Sensors can be said to be intelligent Internet devices and smart networking products under the Internet of Things (IoT) architecture, such as smart robots, smart factories, smart electric cars, smart bracelets, smart medical devices, Smart home appliances, smart mobile phones, etc., perform key components of instant interaction.
The sensor can be defined as: "A device capable of sensing and detecting the physical or chemical quantity of an object to be measured and converting it into a measurable output signal." Among them, the measured physical quantity includes temperature, pressure, magnetism, light, etc.; and the chemical quantity includes pH value, concentration, purity, humidity, and the like.
In recent years, with the rapid development of automation equipment and automation control systems, the field of sensor applications as "sensory" components of electronic devices has also expanded significantly, including transportation, machinery, construction, chemistry, food, medical, home appliances, communications, Manufacturing processing, etc.
Variety of sensors
The following describes several sensors that can be equipped with automation equipment and control systems, and further explains their technical characteristics, technology development direction and application fields.
The Image Sensor captures thousands of rays from a single image. The basic principle is to convert the light energy into electric charge through the photoelectric effect. The stronger the light, the more the charge becomes. The basis for the intensity of light.
Image sensor applications include industrial automation applications such as inspection, metrology, measurement, orientation, and helium detection. Future technology development will move toward lower power consumption, wider wavelength range, higher precision detection and identification, and faster detection and identification speed.
Pressure Sensor (Pressure Sensor) is to detect the pressure intensity of gas or liquid, and convert the pressure intensity into output signal; it has been widely used in various industrial automatic control environments, involving water conservancy and hydropower, railway transportation, intelligent building, automatic production control. , aviation aerospace, etc. Future technologies will evolve toward more micro MEMS cavity structure design and higher sensitivity detection capabilities.
Position sensor (PosiTIon Sensor) is mainly used in robot control systems, such as linear encoders, rotary encoders, servo motors, etc.; technology development is toward higher precision control, acceleration sensing control, and more miniature MEMS cavity structure design. Go ahead.
Level Sensor, also known as line sensor, is divided into inductive displacement sensor, capacitive displacement sensor, photoelectric displacement sensor, ultrasonic displacement sensor, Hall. Displacement sensor; mainly used in intelligent equipment production line for intelligent control of analog quantity. Technological development has evolved toward more micro MEMS cavity structure design, non-contact detection technology development, digital detection technology development, and higher precision control.
Force Sensor is a sensor used to detect the interaction between gases, solids, liquids, etc., and is used in force detection, such as the control of the size of the robot arm. Technology development is moving toward lower power consumption, faster detection response time, and higher accuracy detection and identification.
The Gas Sensor measures the flammable gas and toxic gas components and converts them into output signals for industrial automation, mineral resource detection, meteorological observation and telemetry, fresh storage, anti-theft, energy saving, etc. field. Technological developments are moving toward faster monitoring of reaction times, shorter monitoring distances, and continuous monitoring of more gas types.
Semiconductor sensors are sensors that utilize various physical, chemical, and biological properties of semiconductor materials. Applications include industrial automation, telemetry, industrial robots, household appliances, environmental pollution monitoring, healthcare, medical engineering, bioengineering, and more. Technological development is moving toward more micro MEMS cavity structure design, higher sensitivity detection capability, and lower manufacturing costs.
Fiber optic sensor
A fiber optic sensor (Fiber OpTIc Sensor) can send light from a light source through a fiber to a modulator, causing the parameter to be measured to interact with light entering the modulation zone, resulting in a change in the optical properties of the light. The modulated signal light is sent to the photodetector through the optical fiber, and after demodulation, the measured parameter is obtained. Mainly used in the field of industrial automation, such as magnetic, acoustic, pressure, temperature, acceleration, gyroscope, displacement, liquid, torque, sound and light, current and strain force and other physical quantities. Technological development is advancing in the direction of shorter monitoring distances and improved accuracy of metering energy intensity.
In response to global trends and market changes, manufacturers are actively proposing research and development plans for innovative technology development. Important technological achievements must be protected to avoid losing competitive advantage due to competitors' copying or imitation. In this regard, the scientific and technological community mainly protects the technical achievements through the patent application process. Other manufacturers can understand the trend of patent technology in specific fields and the trend of patent distribution of specific manufacturers through systematic patent exploration and analysis. At the same time, it is also avoided or early. In response to the threat of patent infringement that may arise in the future.
This article uses the approved patents promulgated by the US Patent and Trademark Office (USPTO) as the source of patent search data, and through the "Technical Planning Patent Exploration and Analysis Platform", patent search, patent analysis and patent data download and collation.
Conduct patent analysis on the sensor to grasp the international R&D investment of the sensor, and further understand the trend of patent technology and the possible impact on the industry.
The patent search is based on key sensor manufacturers and is searched by keywords and key fields. Among them, key manufacturers include: Robert Bosch, Denson, Honeywell, Infineon Technologies, STMicrolectronics, Analog Devices, Freescale Semiconductor, etc.; the keywords are Sensors; the classification item is 73* (UPC); the key fields are mainly request items.
The patent search results were judged and adjusted. Finally, 22,612 sensors were screened for US approved patents for analysis.
First, Country, Sector, and Field analysis were performed through the Data Mining function and for 22,612 sensor patents. Secondly, the 22,612 sensor patents were compared to the technical classification project to grasp the distribution of important technical classification items involved in the sensor patent.
Medical/semiconductor patents are valued
According to the comparison table issued by the World Intellectual Property Organization (WIPO), each International Patent Classification (IPC) can correspond to a certain industry and field, and data exploration analysis is carried out accordingly. Through the data exploration function, and comparative analysis of 22,612 sensor patents, further grasp the distribution of the industry and field of the sensor patent.
First, according to the data analysis of the industry of the International Patent Classification (IPC), 22,612 sensor patents belong to the industry, mainly concentrated in Instruments (40.9%), followed by Electrical Engineering (31.1%), Mechanical Engineering (22.4%), Chemistry (3.6%), Other Fields (2.1%).
Secondly, according to the field analysis of the domain of the international patent classification code, 22,612 sensor patents belong to the top ten in the field:
1. Measurement (27.2%)
2. Computer technology (10.9%)
3. Transport (10.0%)
4. Electrical machinery, apparatus, energy (9.1%)
5. Control (7.6%)
6. Engines, pumps, turbines (6.2%)
7. Semiconductors (4.6%)
8. Medical technology (4.3%)
9. Audio-visual technology (3.1%)
10. Mechanical elements (2.1%).
Overall, sensor patents are distributed in the field, mainly in measurement, mechanical, computing technology, transportation, electrical energy devices, control, engines, semiconductors, medical technology, audio-visual technology.
In recent years, sensor patents have been relatively active in the fields of medical technology and semiconductors, and it is worthwhile for the scientific and technological community to pay close attention to the follow-up development trend.
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