Leading the Future with Innovation, Keysight Technology Targets 6G, Autonomous Driving, Quantum Information, New Space

Recently, Keysight Technologies held the annual event Keysight World 2020 in Shanghai. The theme of the conference was “Innovate Next”, and many industry leaders, partners, customers and innovators were invited to gather together to deepen the Discuss the latest trends in the industry, accurately target design and testing trends, and share cutting-edge technological innovation hotspots, covering 5G design and deployment, automotive electronics and new energy vehicles, cutting-edge research, high-speed digital and information security and many other technical fields.

At the meeting, Zheng Jifeng, general manager of Keysight’s Greater China market, pointed out that new technological developments are bringing new opportunities to Keysight. These new development opportunities include 6G, quantum computing, automotive electronics, and new space.

Zheng Jifeng, General Manager, Greater China, Keysight Technologies

For example, he said: “It is predicted that the field of wireless communication may bring a market opportunity of more than 3.6 trillion US dollars in the next 15 years. For IoT (Internet of Things), there may be more than 100 per second in the future. Opportunity access to the Internet of Things. And quantum information, in the future, the investment will reach the level of more than 10 trillion US dollars.”

This year is the first year of large-scale commercial use of 5G, and network openness has become a new trend. A long time ago, Keysight joined O-RAN, an organization that advocates network openness. Keysight Technologies wireless application technical support manager Gu Hongliang said that in the 5G era, the open network concept was proposed by the Open-RAN organization, which provides unified technical standards and constitutes an open network based on SDN (software-defined networking) and NFV (network function virtualization). The network, the open network has its advanced nature, but the implementation of the test level has increased the difficulty. Because each manufacturer only does part of it, there are multiple devices and different devices in a network, and the test environment is much more responsible than before. In response to this situation, Keysight’s solution is to sink in the internals, and proposes a solution to each 5G network. A test plan for a device or node (called a component) can eventually be integrated to complete a network-wide test. Gu Hongliang emphasized that Keysight is the only manufacturer that has solutions for each component in the 5G network.

Hongliang Gu, Technical Support Manager for Wireless Applications, Keysight Technologies

As one of the commanding heights of next-generation technology development, 6G technology also has a layout. Zheng Jifeng said that 6G can bring us a new experience, perhaps higher speed, or ultra-low latency, ultra-large-scale IoT, and possibly heterogeneous services. However, the realization of 6G will obviously not be smooth sailing, and higher requirements are put forward for modules, chips or system design.

In August 2019, Keysight Technologies announced as a co-founding member of the multi-party 6G flagship program, which is strongly supported by the Academy of Finland and led by the University of Oulu, Finland, to promote new wireless communication technologies beyond 5G Research to prepare for the future 6G landing.

In terms of quantum computing, it is also one of the focuses of future scientific and technological development. Zheng Jifeng pointed out that in the future, if we use quantum search algorithms, it can successfully crack almost all of our passwords today, because its computing power is very powerful. . To this end, Keysight Technologies has acquired two companies, Labber Quantum and Signadyne, which have greatly completed its testing solutions in quantum information through mergers and acquisitions. Not only that, Keysight has also established a dedicated quantum information research and development team near the Massachusetts Institute of Technology (MIT) and Lincoln Laboratory.

In terms of automotive electronics, Keysight also chose to make arrangements in advance.Zheng Jifeng said that two years ago, Keysight Technology acquired Scienlab, a company specializing in testing solutions for new energy vehicles.

German technology about new energy vehicle testing solutions. At the same time, Keysight has established new energy and automotive electronics customer solution centers in four cities around the world, namely Michigan in the United States, Boblingen in Germany, Nagoya in Japan, and Shanghai in China.

Du Jiwei, Marketing Manager of Automotive and New Energy Testing Solutions at Keysight Technology Greater China, said that Keysight Technology needs to help customers build a complete laboratory, starting from the planning of air conditioning, cooling systems, and sewer systems, to the completion of the entire laboratory. Detech should participate in the whole process to ensure that the customer’s power battery testing process is flawless, and also reduce the labor input of the customer’s self-built laboratory.

Du Jiwei, Marketing Manager, Automotive and New Energy Testing Solutions, Keysight Technologies Greater China

Of course, there is also the new space. Zheng Jifeng said that in the future, the number of satellites launched in space may increase exponentially compared with today. In the future, there may be tens of thousands or even tens of thousands of satellites orbiting the sky above the earth, truly realizing the so-called integration of heaven and earth. It can also bring opportunities.

At the meeting, Keysight also took this conference to show the media the excellent products of Keysight this year, including the 8-in-1 MXR series oscilloscope, the signal analyzer MXA and network analyzer PNA/PNA, which have always been at the leading level in the industry. -X’s latest breakthrough.

The most important new product launched by Keysight in 2020 is the MXR multi-function oscilloscope, which combines eight instruments including oscilloscope, logic analyzer, protocol analyzer, digital voltmeter, frequency meter, function generator, frequency response analyzer and real-time spectrum analyzer. All in one. According to Huang Teng, Digital Test Product Manager of Keysight Technology Greater China, digital products are going wireless, and the combination of time domain and frequency domain analysis is becoming more and more popular. In the past, digital engineers were good at analyzing time domain equipment, but lacked frequency domain analysis. MXR’s integrated real-time spectrum function solves this problem, providing digital engineers with a pan-signal analysis device that can easily span from the time domain to the frequency domain.

Teng Huang, Digital Test Product Manager, Greater China, Keysight Technologies

The Fault Hunter function is also integrated on the MXR. The waveform refresh rate can reach up to 200,000 times per second, which can greatly reduce the dead time of the oscilloscope. By capturing more continuous data, it is very convenient to catch the problem waveform. Aiming at the problem that it is difficult to set trigger conditions for capturing problematic waveforms, Fault Hunter also optimizes the trigger settings, so that users can easily set trigger conditions and quickly capture the desired waveform.

At the meeting, Zheng Jifeng emphasized the importance of innovation. He pointed out that DeTech has now invested in the research and development of emerging technologies such as 6G mobile communication technology and quantum computing. At the same time, Keysight also attaches great importance to emerging technologies such as quantum computing. Keysight has always maintained corresponding R&D investment for continuous innovation.

Leading the future with innovation, Keysight is embracing the next wave of technology.

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Hardware stamping dies need to go through several major processes

Machining metal stamping dies requires cutting steps, at least cutting or sawing the blanks on the die steel raw materials, and then rough machining. The surface and size of the fresh blank is relatively poor, so you need to go to the previous grinder for rough grinding. At this time, it belongs to rough machining, so the size requirement is not high, and the tolerance of 50 threads is generally enough. After rough machining, heat treatment is required. Generally, heat treatment is processed by a special heat treatment plant. There is not much to introduce in this area.

After the heat treatment, finishing is required. Generally, the grinding machine is used for finishing first. At this time, the size requirements are more stringent. Generally, the accuracy is about 0.01. Of course, this accuracy is not. The specific accuracy requirements should also refer to the complexity and precision of the metal stamping parts that need to be processed by the metal stamping die.

After the grinding machine is processed, the design drawings before the installation are processed. Generally, the hole is threaded first, and then the wire is cut to cut the required size and shape according to the drawing, and then the milling machine, CNC, etc. are used as the case. This specific also depends on the complexity of the metal stamping parts.

The equipment needed for metal stamping die includes sawing machine, lathe, wire cutting, electric spark, milling machine, drilling machine, grinder, etc. These are also equipment that a qualified metal stamping die fitter needs to operate skillfully.

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Plastic Mold Sprue

The Sprue

The sprue is a round, tapered hole which leads the plastics material from the nozzle of the heating cylinder of the injection molding machine to the distributing runners in the mold. A typical sprue is shown in Fig. below.

The heater nozzle makes contact with the sprue bushing at the small end of the taper, against some sort of accurately fitting seat which in this diagram is shown to be spherical.

The diameter of the small end of the sprue should be .015″ to .025″ larger than the orifice at the end of the heater nozzle.

sprue

This provides sufficient margin for possible variation in nozzle and mold alignment, so the portion of the sprue which breaks off inside the nozzle when the mold opens will not overhang the hole in the bushing and prevent free passage of the sprue through it.

The size of the nozzle and sprue employed for a specific molding application should be in proportion to the size of the shot or charge of material required to fill the mold.

Large sprues generally provide better flowing conditions than small sprues, and do no particular harm except to increase the amount of sprue scrap which must be reprocessed and used again.

A taper of 2°-30′ on a side is need

This is a practical amount which will insure easy release of the sprue but which will not increase the diameter of the large end unduly for a long sprue.

The taper should be reamed smoothly, without tool marks, and it should be polished.

Rough sprues may cause losses of as much as 10 seconds in the molding cycle because of the extra time the molded material requires to cool and harden sufficiently to permit it to be pulled out of the rough hole.

The use of a standard taper angle for all of the sprue bushings manufactured in a single shop makes it possible to use a single reamer for reaming a wide range of diameters and lengths.

The shoulder on the sprue bushing should be rather long, because there is possibility of encountering large thrusting forces which tend to push the shank through the shoulder.

A generous radius where the diameter changes avoids stress concentration and hardening cracks. A radius at the large end of the sprue, where it meets the runner, improves the flowing conditions for the material.

Mold steel should be used in making the sprue bushing, because it should be hardened to 40-45 Rockwell C. This makes the bushing resistant to crushing and brinelling, and thus it helps in maintaining good seating of the nozzle, which prevents the molding material from leaking out at this junction.

Also, lodged or stuck sprues may be hammered out with a rod of brass or other soft metal without damaging the seat or taper.

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How to avoid the accident of CNC lathe?

For CNC lathe tool collision accidents, personal accidents or equipment accidents may occur if the safety operation regulations of the lathe are not followed. In the process of processing, because most of them are equipped with safety protection doors, the safety doors are required to be closed during processing, and the operator does not directly operate the machine tool. Therefore, the probability of personal accidents is very small, but the probability of equipment accidents is much greater than that of other mechanical processing. , When operating the machine tool, technicians often make programming mistakes, input errors, and make corrections, and the coordinate system or tool compensation is driven into the error. Carelessness when operating the machine tool will cause a tool collision accident. If the tool crash occurs during the use of the CNC lathe, it will not only bring great psychological pressure to the operator, but also cause certain economic losses. So how to avoid and prevent it?
In fact, the occurrence of tool collision accidents can be followed regularly. Because the software is used for locking during Cnc Machining, it is not intuitive to see whether the machine tool is locked in the simulation interface when the automatic operation button is pressed during simulation processing. live. There is often no tool setting during simulation. If the machine tool is not locked and running, tool collision is very likely to occur. Therefore, you should go to the running interface to confirm whether the machine tool is locked before simulating processing. Forgot to turn off the air transport switch during processing. Because in the program simulation, in order to save time, the dry run switch is often turned on. There is no reference point return after the dry run simulation. When verifying the program, the CNC lathe is locked and the tool is in the simulation operation relative to the workpiece processing (absolute coordinates and relative coordinates are changing). At this time, the coordinates do not match the actual position. The method of returning to the reference point must be used to ensure The machine zero coordinate is consistent with the absolute and relative coordinates.
When the CNC lathe is overtravel, you should press the overtravel release button and move it in the opposite direction manually or manually to eliminate it. However, if the direction of release is reversed, it will cause damage to the machine tool. Because when the overtravel release is pressed, the overtravel protection of the machine tool will not work, and the travel switch of the overtravel protection is already at the end of the travel. At this time, it may cause the workbench to continue to move in the overtravel direction, and eventually the lead screw will be broken, causing damage to the machine tool. When the specified line is running, it is often executed downward from the cursor position. For the lathe, it is necessary to call the tool offset value of the used tool. If the tool is not called, the tool of the running program segment may not be the desired tool, and it is very likely that the tool collision accident may occur due to different tools. Of course, the coordinate system such as G54 and the length compensation value of the tool must be called first on the machining center and Cnc Milling Machine. Because the length compensation value of each tool is different, it may cause tool collision if it is not called.

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How augmented reality-assisted surgery is revolutionizing the medical industry

Recently, the augmented reality (AR) knee arthroplasty navigation system Knee+ from French company Pixee Medical received CE certification, which is the first orthopaedic navigation system approved to use augmented reality (AR) in total knee arthroplasty. Similar applications of augmented reality technology in surgical navigation are booming around the world. Augmented reality-assisted surgical technology is of great significance for preoperative planning, intraoperative guidance and postoperative rehabilitation. This article will explain the basic concepts, technical principles, market conditions, major companies and representative products, and describe the future development is discussed.

1. Basic Concepts

1. Augmented Reality (AR)

Augmented reality (AR) is a technology that superimposes computer-processed images of virtual models into real scenes to enhance real scenes. It enhances people’s perception of the real world around them, and integrates simulated scenes, objects, and related prompt information (such as sound, video, graphics or GPS data) into the real scene to enhance the effect. The fundamental discipline of augmented reality (AR) technology is computer vision. It uses tools such as displays, cameras and sensors to overlay digital information onto the real world.

  How augmented reality-assisted surgery is revolutionizing the medical industry

2. Surgical navigation system

Surgical navigation is a technology that accurately corresponds the image data of the patient before or during the operation with the patient’s anatomical structure, tracks the instruments during the operation, and updates and displays their position on the patient’s image in real time in the form of a virtual probe. Surgical navigation enables doctors to see the location of instruments at a glance, making surgery faster, more precise, and safer. After years of development, surgical navigation has become the standard for neurosurgical treatment and is gradually gaining popularity in other fields. Currently in the US surgical navigation market, 578,375 procedures are performed each year, which is expected to grow to 718,224 by 2025. In the United States, surgical navigation is most commonly used in neurosurgery, accounting for approximately 43.3% of the total number of cases; in Europe, the most common is total knee arthroplasty (TKA).

2. Technical principle

Augmented reality surgical navigation system includes three cores: virtual image or environment modeling, virtual environment and real space registration, and Display technology that combines virtual and real environments.

1. Virtual image or environment modeling

AR systems use color or texture distinctions between anatomical structures in CT or MRI tomography and angiography to accomplish 3D reconstruction of subsurface objects in a computer. Non-realistic rendering or inverted reality techniques can improve visualization and depth perception.

2. Registration of virtual environment and real space

Registration can be accomplished by a variety of means, and a three-dimensional Cartesian system based on frame technology can determine the position and attitude of the imaging device.

3. Display technology that combines virtual and real environments

Display technology can be broadly classified into head-mounted displays (HMDs), enhanced external displays, enhanced optical systems, enhanced window displays, and image projection. Using HMD, the virtual environment can be covered not only in the real world under the user’s field of vision (optical perspective), but also in the video source of the real environment (video perspective). Augmented displays are simple stand-alone screens that display virtual content over real-world video. Optically enhanced displays refer to the direct enhancement of the eyepieces of a surgical microscope or binocular. Window-enhanced display is the placement of a translucent screen directly over the surgical site, allowing virtual objects to be displayed directly on the screen over real objects. The virtual environment can be projected directly onto the patient with a projector.

3. Market situation

Augmented reality (AR) applications in the medical market are growing strongly with an expected CAGR of 33.36%, and the market value is expected to grow from $627 million in 2018 to $3.497 billion in 2024. AR technology is gaining a lot of attention from physicians due to its wide range of applications, from assessing surgical preparation to minimally invasive surgery and rehabilitation. Furthermore, according to ResearchandMarkets, the global surgical imaging market size is expected to reach USD 1.7 billion by 2025, growing at a CAGR of 5.4% during the forecast period. The latest role and integration of augmented reality (AR) in healthcare is enhancing the surgical experience. The rapid development of real-time visualization platforms has also led to better surgical treatments. Furthermore, increasing government funding, growing prevalence of sports injuries, and expanding geriatric population are factors contributing to the growth of the global surgical imaging market. Based on application, the market is segmented into neurosurgery, orthopedic and trauma surgery, cardiac and vascular surgery, general surgery, and other surgeries.

4. Main companies and representative products

1. Knee+ system of Pixee Medical

Founded in France in October 2017, PixeeMedical aims to leverage existing advanced computer vision and artificial intelligence technologies to create high-performance computer-assisted surgical solutions while keeping prices affordable in challenging health system environments. Knee+ just recently received CE certification for augmented reality knee arthroplasty navigation. This is the first orthopaedic navigation system to use augmented reality (AR) in total knee arthroplasty. FDA 510(k) approval for the system is currently being sought.

Knee+ patented technology combines proprietary computer vision and deep learning algorithms to work with off-the-shelf AR glasses to track instruments and implants during surgery. Navigation software installed in the smart glasses is combined with a reduced-scale MIS instrument with markers that can be sterilized in an autoclave. Size and ligament balance features can be quickly integrated into the product. As an alternative to bulky and expensive robotic systems, the Knee+ is simple to use, cost-effective, and does not require preoperative DICOM or disposable equipment. Future applications may be introduced into shoulder and hip surgery.

2. XVisionSpine system from Augmedics

Augmedics is a company dedicated to the development of surgical treatment technology, established in 2014. The first product, the xvision-spine (XVS) system, is an augmented reality surgical navigation system. With the XVS system, surgeons can see the real-time position and trajectory of surgical tools under the skin and tissue and navigate inside the patient, making surgery easier, faster and safer. The XVS uses patented see-through optics to project 3D images, as well as axial and sagittal planes, onto the surgeon’s retina in real time with surgical precision and excellent depth perception.

The XVS system includes a transparent near-eye display headset and has all the elements of a traditional navigation system. It accurately determines the location of surgical tools in real-time and superimposes it on the patient’s computed tomography data. The navigation data is then projected onto the surgeon’s retina using a transparent near-eye display headset, allowing the surgeon to simultaneously gaze at the patient and view the navigation data without having to move the eye to a remote screen. In a study conducted at Rush University Medical Center in Chicago, XVision was found to increase surgeon accuracy to an impressive 98.9 percent. The accuracy of the entire system is about 1.4 mm, which meets the US FDA’s requirement of less than 2 mm.

3. VOSTARS Video Optical Perspective Augmented Reality Surgical System

VOSTARS is an innovative action project funded by the Horizon 2020 program. Augmented reality (AR) surgical goggles developed by European scientists are able to see X-ray images and all key data perfectly superimposed in 3D with anatomical structures at once, and move freely at the same time. The VOSTARS Video Optical Fluoroscopy Augmented Reality Surgical System will conveniently display the patient’s anesthesia data, heart rate, body temperature, blood pressure and respiratory rate, etc. within the surgeon’s field of vision. Surgical accuracy will be significantly improved while reducing surgical time (20 minutes for every three-hour procedure), time under anesthesia and the costs involved in any surgery. The project plans to achieve mass production in 2022.

The system combines two existing AR technologies: video see-through (VST) and optical see-through (OST). Neither VST nor OST alone are suitable for surgery on live patients. OST systems such as Microsoft Hololens use translucent mirror surfaces to provide users with a direct view of the natural environment by superimposing computer-generated images on the user’s field of vision. VST systems such as the OcculusRift submerge the user in a virtual world with an enclosed head-mounted display (HMD) and stereoscopic cameras and screens.

4. TrueVision? 3DSurgical system

TrueVision™ 3DSurgical is the global leader in digital 3D visualization and the benchmark for microsurgery. Founded in 2003 and headquartered in Santa Barbara, California, TrueVision® helps doctors perform microsurgery through a self-developed digital 3D visualization platform. The intelligent, real-time, 3D visualization surgery and computer-aided guidance platform developed by the company has been patented.

The system enables surgeons to record surgical procedures in 3D and stream them live, making it an entirely new teaching tool. The company has developed a 3D guidance application for microsurgery that can improve surgical efficiency and patient outcomes. The system can be used in microsurgery, ophthalmology, and neurology, and can be integrated with a variety of application platforms and, in some cases, robotic surgery. The system is used by hundreds of mainstream hospitals and institutions around the world.

5. Discussion on the future development of augmented reality (AR) surgical navigation system

The application of augmented reality in clinical surgery spans many disciplines such as computer science, computer vision, sensors, communications, clinical medicine, and ergonomics, and the technology covers a wide range of areas. It can be seen from the following roadmap of augmented reality (AR)-assisted surgery: future tracking technology and image processing will be more inclined to intelligent technologies represented by deep learning, displays and sensors will be more inclined to technologies that are highly related to human organs, Such as retina display and human-computer symbiosis technology.

  

At the same time, there are challenges and obstacles in the development of augmented reality-assisted surgery. For example, for some display technologies, there are challenges in displaying 3D virtual objects as real-world images; time synchronization between virtual and real environments is another challenge for all AR systems. , especially rapid fluoroscopy changes; in the process of surgery, in some cases, image composite needs to be performed by a professional computer team; the compatibility and interoperability between the augmented reality surgical navigation system and related equipment and solutions need to be optimized improvement; data privacy issues, etc.

Epilogue

Medical surgery navigation is one of the important applications of augmented reality technology. In the era of image-guided surgery, augmented reality (AR) technology represents the next frontier in incorporating guidance systems into surgical workflows. With the rapid development of display technology and interactive technology, the role of augmented reality (AR) in the modern surgical operating room will increase.

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Application of 3kw fiber laser cutting machine in stainless steel decoration engineering industryApplication of 3kw fiber laser cutting machine in stainless ste

Fiber laser Cutting Machine 3kw has become one of the main tools for modern enterprises to process metals. Laser cutting is to irradiate the workpiece with a focused high-power density laser beam to melt, vaporize, ablate or reach the ignition point of the irradiated material.

At the same time, the molten material is blown off by the high-speed air flow coaxial with the beam, thereby achieving workpiece cutting.Stainless steel is widely used in the decoration engineering industry due to its characteristics such as corrosion resistance, high mechanical properties, stable surface color, and color change depending on the angle of light. For example, in the decoration and decoration of local buildings such as entertainment clubs and public leisure places, it is used as a material for the production of decorative objects such as curtain walls, hall walls, elevator decorations, signboard advertisements, and screens at the front desk.

However, it is a very complicated job to make stainless steel plate into stainless steel products, and many manufacturing processes are required, such as cutting, folding, bending, welding and other mechanical processing procedures. Among them, the cutting process is an important process. There are many traditional processing methods for stainless Steel Cutting, but the efficiency is low, the molding quality is poor, and the demand for mass production is rarely achieved.

At present, stainless steel ipg fiber laser cutting machine are used in metal processing and decoration engineering industries due to their good beams, high precision, small slits, smooth cut surfaces, and ability to cut arbitrary graphics. With the increasingly fierce market competition, laser cutting will play an increasingly important role and bring economic benefits.

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Dalian Dapinjia Group Launches EVB, a Touch Sensing Design Solution Based on Microchip Products

On October 15th, 2021, the leading semiconductor component distributor dedicated to the Asia-Pacific market, General Assembly Holdings, announced that its subsidiary Pinjia has launched a touch-sensing design solution EVB based on Microchip’s ATTINY1616.

Dalian Dapinjia Group Launches EVB, a Touch Sensing Design Solution Based on Microchip Products

Figure 1-Display board diagram of the touch-sensing design solution based on Microchip products by Dalian Dapinjia

Touch sensing is becoming a technological trend. It can be found in household appliances, portable Electronic products, or car control screens. The touch-sensitive design is favored by users due to its beauty and durability. In today’s rapidly changing market, manufacturers urgently need a high-performance touch sensing design to meet market demand. The touch sensing design solution EVB, launched by Dalian Dapinjia based on Microchip ATTINY1616 MCU, can help developers complete the design in a short period of time, thereby seizing the market.

  

Dalian Dapinjia Group Launches EVB, a Touch Sensing Design Solution Based on Microchip Products

Figure 2-Scenario application diagram of Dalian Dapinjia’s touch sensing design solution based on Microchip products

This solution uses an 8-bit MCU from Microchip-ATTINY1616. With the Atmel Studio development environment, it can easily realize the design of touch buttons, sliders, and scroll wheels. Microchip is a supplier of intelligent, connected and secure embedded control solutions. Its easy-to-use development tools and comprehensive product portfolio enable customers to create optimal designs, thereby reducing risk while reducing overall system costs.

As a touch sensing design, this solution uses the principle of self-capacitance sensing, that is, detecting changes in the sensor capacitance. There is a parasitic capacitance Cp between the Sensor (capacitive buttons and sliders) and the ground. When a touch occurs, a finger capacitance Cf will be formed, and the total capacitance Cs will change at this time. There are two kinds of Microchip capacitive sensing technology, one is based on mTouch? Technology CVD, and the other is QTouch? Technology PTC. The ATTINY1616 chip used this time is equipped with QTouch technology. It can be used for button, slider and scroll wheel design, and provides built-in hardware for capacitive touch measurement. PTC supports mutual capacitance and self-capacitance measurement, without any external components, can provide excellent sensitivity, noise immunity and self-calibration function, and can minimize the workload required for the user to adjust the sensitivity.

  

Dalian Dapinjia Group Launches EVB, a Touch Sensing Design Solution Based on Microchip Products

Figure 3-Block diagram of the touch sensing design solution based on Microchip products by Dalian Dapinjia

The noise problem is an unavoidable problem with capacitive touch. Both common mode noise and differential mode noise will affect the performance of touch keys. Therefore, designers need to consider noise immunity at the beginning of the design. This scheme can realize the anti-noise design well through hardware design + software debugging. In addition, the solution can also achieve a waterproof design by adding Driven Shield or Driven Shield+.

Core technical advantages:

Anti-noise ability:

High signal-to-noise ratio (SNR);

Passed IEC61000 EFT and BCI test.

Water resistant touch function:

The touch interface can be used normally under various environmental conditions (including wet surfaces), without the need to clean or dry hands each time the device is used.

Metal surface touch function, waterproof touch function:

Microchip provides metal surface capacitance (MoC) technology, which supports:

Metal surface: stainless steel or aluminum;

Can be tested through gloves of any thickness;

Waterproof design;

Support Braille interface.

Low power consumption:

The dedicated hardware on PIC, AVR and SAM devices supports the touch function with the lowest power consumption, and its capacitive sensing current is less than 5μA.

Support mutual capacitance touch sensing, can support multiple keys:

Microchip has optimized and enhanced the method of scanning a large number of buttons in a matrix. Costs can be saved in several ways:

Reduce the number of feed lines and simplify the connection of input and output (flexPCB) ports;

Reduce the number of pins required for touch, making the device cost-effective and occupying less space;

Through Microchip’s unique inherent feed line length compensation, the development time is greatly reduced.

Safety certified touch sensing function:

Microchip provides products (off-the-shelf products and sensor libraries) that have passed the IEC/UL 60730 safety class B standard certification.

Scheme specifications:

Microchip ATTINY1616:

Up to 12 self-capacitive keys/36 mutual-capacitive keys can be realized;

Designs such as sliders and rollers can be realized;

Support Driven Shield and Driven Shield+;

With I2C/SPI/UART interface;

There are car-regulated products.

  

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