According to the modulation form of the light measured object, it can be divided into: intensity modulation type, polarization state type, phase type and frequency type;
According to whether the light interferes or not, it can be divided into: interference type and non-interference type;
According to whether it can be continuously monitored with the increase of distance, it can be divided into: distributed and point-fraction;
According to the role of optical fiber in the sensor, it can be divided into: one is the functional fiber (abbreviated as FF) sensor, also known as the sensing sensor; The other type is non-functional fiber (abbreviated as NFF), also known as light-transmitting sensors.
Functional
The functional sensor uses the characteristics of the optical fiber itself to modulate the light transmitted in the optical fiber by using the optical fiber as a sensitive element, so that the intensity, phase, frequency or polarization state of the transmitted light changes, and then the measured signal is obtained by demodulating the modulated signal.
The optical fiber is not only a light guide medium, but also a sensitive element, in which the light is measured and modulated, and multimode optical fiber is mostly used.
Advantages: compact structure and high sensitivity.
Disadvantages: special optical fibers must be used, high cost,
Typical examples: fiber optic gyroscopes, fiber optic hydrophones, etc.
Non-functional fiber optic type
Non-functional optical fiber sensors use other sensitive components to sense the changes to be measured, and optical fibers are only used as a transmission medium for information, often using single-mode optical fibers.
Optical fibers only act as light guides, and the light is measured and modulated on the fiber-type sensitive elements.
Advantages: Optical fiber can be used for galvanic isolation, can be used for data transmission, and the signal transmitted by optical fiber is not affected by electromagnetic interference.
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Banner Sensors – An introduction to the application of fiber optic sensors
1. Detection of temperature
The optical fiber temperature sensor uses a polymer temperature-sensitive material that matches the refractive index of the optical fiber to coat the outside of two optical fibers that are fused together, so that the light energy is input from one optical fiber to the reflective surface and output from the other optical fiber.
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Banner Sensor - Introduction to the advantages of fiber optic sensors
1. High precision, fast response speed, wide range of linear features, good repeatability of use, high signal-to-noise ratio of detection signal, due to the mass production of optical fiber, low price, can be widely used.
2. The optical fiber is made of dielectric material quartz, which transmits optical signals, so it is safe ...
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Banner Sensors – Features and Uses of Fiber Optic Sensors
peculiarity
1. Because the prism is used in the reflector, its detection performance is higher and more reliable than that of the general reflective light-controlled sensor
2. Compared with the detached photosensor, the circuit connection is simpler and easier.
3. The design of the child and mother buckle is embedded, and the safety ...
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Banner Sensors – The difference between fiber optic sensors and photoelectric sensors
The first point is that photoelectric sensors and fiber optic sensors work differently
First of all, from the working principle of the two, first of all, the photoelectric sensor works according to the principle of the photoelectric effect, that is, when the light hits the photoelectric sensor made of semiconductors, it will emit light ...
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Banner - Talking about the differences between RTU, ASCII, and TCP in the Modbus protocol
Modbus is an application-layer protocol that defines a data unit (ADU) that is independent of the underlying network and can communicate over Ethernet (TCP/IP) or serial links (RS232, RS485, etc.) (Ethernet ADUs and serial ADUs are slightly different). On a serial link, the Modbus protocol has two ...
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Banner Sensors – Six Elements of Fiber Optic Sensor Selection
1. Determine the type according to the measurement object and environment
It is necessary to carefully analyze the measurement work and consider which principle of sensor to use for measurement, because even the same physical quantity can be measured by different principles. Secondly, we have to consider the range, volume (whether the space is sufficient), amperemia ...
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Banner Sensor – The difference between a photoelectric sensor and an infrared sensor
The sensor is a kind of detection device, which can feel the measured information, and can transform the felt information into electrical signals or other required forms of information output according to a certain law, so as to meet the requirements of information transmission, processing, storage, display, recording and control. Photoelectric sensors and ...
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Banner Sensors - Introduction to the characteristics of fiber optic sensors
1. High precision, fast response speed, wide range of linear features, good repeatability of use, high signal-to-noise ratio of detection signal, due to the mass production of optical fiber, low price, can be widely used.
2. The optical fiber is made of dielectric material quartz, which transmits optical signals, so it is safe ...
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Banner Sensors – A way to test the quality of pressure sensors
First, the test method of pressure sensor
The test on pressure sensors mainly includes the following aspects:
Resistance test
Output signal test
Overload test
1. Resistance test
The test machines are as follows: power supply, multimeter, ammeter, ...
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Common failures of Banner displacement sensors
The common faults of Banner displacement sensors are described in seven points, the details are as follows:
The linear line works on the same principle as a sliding rheostat and is used as a voltage divider, which represents the actual position of the measured position with a relative output voltage. To this outfit ...
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Banner Sensors – An introduction to several package forms of temperature sensors
1. Ordinary metal straight tube package temperature sensor
The packaging form of this temperature sensor is mostly used in a simple installation environment, and is divided into high temperature temperature sensor, medium temperature or ordinary temperature sensor and low temperature temperature sensor according to the measured temperature range.
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Banner Sensors – How pressure sensors work
1. Piezoresistive pressure sensor
Resistive strain gauges are one of the main components of piezoresistive strain transducers. The working principle of metal resistance strain gauge is the phenomenon that the resistance value changes due to mechanical deformation due to the strain resistance adsorbed on the base material, which is commonly known as the resistance strain effect.
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Banner Sensors – Application Scenarios for Pressure Sensors
01. Application of pressure sensor in weighing system
In industrial control, pressure sensing technology is increasingly being used in commercial weighing systems. In many control processes, it is often necessary to collect pressure signals and convert them into electrical signals that can be automatically controlled.
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What problems do Banner laser distance sensors have that need to be solved?
(1) When the target to be measured is not perpendicular to the transducer of the sensor. This is because the target of the ultrasonic test must be within an angle of no more than 10° perpendicular to the sensor.
(2) When a small beam diameter is required. Because the diameter of the general ultrasonic beam is ...
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Banner Sensors - Introduction to the characteristics of distributed fiber optic sensors
(1) The sensing element in the distributed optical fiber sensing system is only optical fiber;
(2) The one-dimensional distribution map of the measured optical fiber area can be obtained in one measurement, and the two-dimensional and three-dimensional distribution of the measured can be measured by erecting the optical fiber into a grating-like shape;
(3) The space of the OTDR system ...
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Banner Sensors - The difference between photoelectric level switches and capacitive level sensors
The increasing adoption of industrial automation, technological advancements in liquid level sensors, and increasing usage in the energy and power sectors will drive the growth of the global liquid level sensors market. However, the lack of precision and accuracy of liquid level sensors may hinder the market growth. There are several types of level sensors, ...
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Installation steps for Banner safety light curtains
1. Determine the installation location. Like injection molding machines, hydraulic presses, etc., are generally installed on the front 2 sides, and some non-standard equipment should be determined according to the actual situation to determine the installation position, to achieve the role of protection, without hindering the normal work.
2. Punching. Determine the installation location ...
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Banner Sensors – Rope Position Sensor Maintenance Considerations
1. The working principle and common parameters of the rope displacement sensor
The function of a rope-actuated displacement sensor is to convert mechanical motion into an electrical signal that can be measured, recorded or transmitted. The rope displacement sensor consists of a stretchable stainless steel rope wound around a threaded hub with a ...
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Banner Sensors - An introduction to the classification of displacement sensors
The displacement sensor has the advantages of digitization, high accuracy, strong anti-interference ability, no human reading error, easy installation, and reliable use. Displacement sensors can be divided into inductive displacement sensors, capacitive displacement sensors, photoelectric displacement sensors, displacement sensors, ultrasonic displacement ...
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How to adjust the sensitivity of Banner color scale sensors
1. Adjust the installation position: After the wire is connected and energized, carefully adjust the installation position to make the light point projected on the surface of the measured object the clearest and brightest.
2. In general, turning the sensitivity knob clockwise can make the green light (OUT2) on, and counterclockwise turning the red light (OUT1) on.
a. Replace the light point ...
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