Photoelectric switches are what we generally call sensors. The definition of the sensor under the national standard GB7665-87 is: the equipment or device that can feel the specified measured parts and convert them into usable signals in accordance with certain rules, generally composed of sensitive elements and conversion elements.
The sensor is a kind of detection device, which can feel the measured information, and can change the detected and felt information into an electrical signal or other required form of information output according to certain rules, so as to meet the requirements of information transmission, processing, storage, display, recording and control. It is the link to complete automatic detection and automatic control.
Function:
The function of the sensor is often compared with the five major sensory organs of human beings: Light-sensitive sensor--vision Acoustic sensor--auditory Gas sensor--smell Chemical sensor--taste Pressure-sensitive, temperature-sensitive, fluid sensor--tactile Classification of sensitive components: (1) Physical category, according to physical effects such as force, heat, light, electricity, magnetism and sound. (2) Chemistry, according to the principle of chemical reactions. (3) Biological categories, according to enzymes, antibodies, hormones and other molecular recognition functions. Generally, according to its basic sensing function, it can be divided into ten categories, such as thermal elements, photosensitive elements, gas-sensitive elements, force-sensitive elements, magnetic sensitive elements, moisture-sensitive elements, sound-sensitive elements, radiation sensitive elements, color-sensitive elements and taste-sensitive elements (some people have divided sensitive elements into 46 categories).
Features (Features of the sensor)
The characteristics of the sensor include: miniaturization, digitization, intelligence, multi-functional, systematization, networking, it not only promotes the transformation and upgrading of traditional industries, but also may establish the best industry, and then become a new economic growth point in the 21st century. Miniaturization is based on the skills of microelectro-mechanical systems (MEMS), and has been successfully applied to silicon devices to make silicon pressure sensors.
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The selection of proximity sensors follows the essentials – the blessing of the United States
For different raw material detection bodies and different detection intervals, different types of proximity sensors should be selected to make them have a high performance-to-price ratio in the system, for which the following principles should be followed in the selection:
1. When the detector body is a metal material: high-frequency oscillation proximity ...
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Introducing the P+F Ultrasonic Technology Series
In industrial use, ultrasonic sensors are characterized by high reliability and versatility. Since the ultrasonic sensor measurement method works reliably in almost all environmental conditions, it is possible to provide a stable connection for object detection or level measurement even in the most chaotic tasks.
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Tips and tricks for using sensors – a blessing
Tip 1 – Start with the bus stuff
As a first step, the engineer should use the method of first interfacing the sensor to constrain the ignorance through a bus thing. A bus thing connects to a personal computer (PC) and then to the sensor for I2C, SPI or other ...
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Illustrate the dynamic characteristics and linearity of our sensors
The dynamic characteristics of a sensor refer to the characteristics of the output of the sensor when the input changes. In practice, the dynamic characteristics of the sensor are often indicated by its echo to some normative input signals, because the echo of the sensor to the normative input signal is easy to obtain by experimental methods, ...
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The main classification of encoders – Beggarb
Encoders can be classified as follows.
1. Classification according to the engraving method of the code disc
(1) Incremental type: that is, every time the viewpoint of the unit is rotated, a pulse signal is announced (there is also a sine and cosine signal, and then it is ...
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Q&A on ultrasonic sensor technology
Q1: How does the ultrasonic sensor work?
Ultrasonic sensors are used to measure the detection function of emitting high-frequency sound pulses that are inaudible to the human ear, which are dispersed in the air into a conical shape and reflected back as soon as they hit an object. Ultrasonic ...
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The difference between a light sensor and a photoelectric sensor – we are blessed
Sensors we all know, at the same time the market demand is very large, there are many varieties, during which people are more commonly used light sensors and photoelectric sensors, although only a word difference, but the difference between the two is very large.
1. Different definitions:
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Exhibit at productap China 2019
On March 20, at the 2019 Munich Shanghai Electronic Production Equipment Exhibition, the reporter of Zhihui Industry interviewed Mr. Xiao Dong, the sales manager of the South China Region of the company, and Mr. Xiao shared the history of the company's development, the strategy of shopping malls in China, and the latest products brought by the company at this exhibition.
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Introduction of photoelectric switches for sensors
Photoelectric switches are what we generally call sensors. **Standard GB7665-87 defines a sensor as: a device or device that can sense the specified measured part and convert it into a usable signal in accordance with certain rules, which is generally composed of a sensitive element and a conversion element.
The sensor is a ...
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Features of image sensors – a blessing
Picture sensor is an extremely useful product, which has gradually attracted the favor of shopping malls with its strong sensitivity and speed.
The use of picture sensors in daily life is undoubtedly a digital camera product, and its development speed can be described as changing with each passing day. At...
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P+F proximity switch selection points
1. Select the proximity switch type according to the detected object. If the detection object is metal, the inductive proximity switch is preferred, and if the detection object is a non-metal such as wood, plastic, paper, water, etc., or a smaller and finer metal, a capacitive proximity switch should be selected.
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Introduction to the sensor model
Proximity Switches:
NBB2-12GM50-E2 NBB2-12GM50-E0 NBN4-12GM50-E2
NBN4-12GM50-E0 NBB5-18GM50-E2 NBB5-18GM50-E0
NBN8-18GM50-E2 NBN8-18GM50-E0 NBN15-30GM50-E0
NBN15-3 ...
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Points to note for encoder installation
1. Each electrical interface has its own characteristics, but also has different baud rate and transmission interval, which can be selected according to the specific application environment of the site, and the actual transmission interval is very related to the transmission rate, encoder and communication cable installation disturbance environment, grounding, cable material selection, etc.
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Safety barriers are used for intrinsically safe system features
The barrier and barrier are composed of four parts: the input signal processing unit, the barrier unit, the output signal processing unit, and the power supply. Depending on the direction of the signal, a substantial safety plan is added to the input or output unit, which then forms a barrier and a barrier. Traditional barrier and safety ...
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Test method for sensor output
1. Test for NPN output sensor
The NPN sensor output, also known as OC gate output, is based on the principle of open collector output of a transistor.
The principle of NPN type OC gate output is whether the output of the NPN transistor and GND are short-circuited. When the transistor is turned on, the output and GND ( ...
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The role and classification of safety barriers
In electrical intrinsic safety explosion-proof (abbreviation: intrinsically safe explosion-proof), we generally divide the workplace into explosion-proof area and non-explosion-proof area. There is the transmission of electrical energy between the explosion-proof area and the non-explosion-proof area, for example, the switches, buttons, sensors, etc. in the explosion-proof area are connected to the non-explosion-proof area through the wires.
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The difference between NPN and PNP photoelectric switches – we are blessed
The difference between NPN type and PNP photoelectric switching sensors lies in the different output levels. NPN outputs low, PNP then outputs high. The type of photoelectric switch is a very specialized technical issue. What are photoelectric switches NPN and PNP? What are their differences?
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Installation and equipping of ultrasonic sensors
Ultrasonic sensors are used for the inspection of printed circuit boards (PCBs):
In this application, ultrasonic sensors are used to inspect printed circuit boards. So what factors need to be considered when installing and installing ultrasonic sensors ...
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Troubleshooting for coding problems
P+F encoders are devices that compile signals (e.g. bit streams) or data and convert them into signals that can be communicated, transmitted, and stored. The P+F encoder converts angular or linear displacements, the former known as the code disc and the latter into an electrical signal. Therefore, the phenomenon: 1, ...
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Sensor calibration method – Blessing Blessing
Sensor calibration refers to the process of transmitting the standard value expressed by the norm to the indexing of the sensor's operating range, and the indexing is determined.
The calibration of the sensor is based on the standard value generated by a standard device (e.g. a known standard force, pressure, torque, displacement, etc.).
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