(1) Conductive plastic displacement sensor
Conductive plastic displacement sensors use a special process to coat the insulating body with DAP (didipropylphthalate) resistance paste, heat and polymerize to form a resistive film, or a solid body formed by thermoplastic pressing DAP resistive powder into the groove of the insulating matrix as a resistive body. The characteristics are: good slippery, excellent resolution, good wear resistance, long life, low dynamic noise, high reliability, and chemical corrosion resistance. Servo systems for world devices, aircraft radar antennas, etc.
(2) Inductive displacement sensor
Inductive displacement sensor is a kind of linear device attributed to metal induction, after the power is turned on, an alternating magnetic field will be generated on the sensing surface of the switch, when the metal object is close to this sensing surface, eddy current is generated in the metal and absorbs the energy of the oscillator, so that the output amplitude of the oscillator is linearly attenuated, and then according to the change of the attenuation amount to complete the intention of detecting the object without touch.
(3) Photoelectric displacement sensor (photoelectric sensor):
Photoelectric displacement sensor is based on the amount of obstruction luminous flux of the measured target to measure the displacement or geometric size of the target. It is characterized by non-touch measurement, and can be measured continuously. Photoelectric displacement sensors are often used to measure the diameter of wires in succession or as edge orientation sensors in strip edge orientation control systems. The advantage is that the mechanical touch is eliminated, the life is long, the reliability is high, and the defect is the digital signal output, which is cumbersome to handle.
(4) Metal film displacement sensor
The resistive body of a metal film displacement sensor can be composed of an alloy film, a metal oxide film, a metal foil, etc. It is characterized by high resolution, high temperature resistance, low temperature coefficient, low dynamic noise, and good lubricability. Metallic glass uranium sensors,
(5) Wound displacement sensor:
Wirewound displacement sensors are made by using constantan wire or nichrome wire as a resistor and winding it around an insulating frame. The winding potentiometer is characterized by small touch resistance, high precision, and small temperature coefficient, and its defects are poor resolution, low resistance, and poor high-frequency characteristics. It is mainly used as voltage divider, rheostat, zero adjustment and working point in the instrument.
(6) Metallic glass uranium displacement sensor
The metal-glass uranium displacement sensor is made by coating the metal-glass uranium resistance paste on a ceramic matrix according to a certain pattern by screen printing method, and sintering at high temperature. The characteristics are: wide resistance range, good heat resistance, strong overload capacity, moisture resistance, wear resistance, etc., it is a promising type of potentiometer, and the defects are touch resistance and current noise.
(7) Magnetic displacement sensor
Magnetic displacement sensor eliminates mechanical touch, long life, high reliability, defects: high requirements for the working environment.
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Displacement sensor failure solution - double blessing
(1) Electronic ruler
When the electronic ruler is used to a certain moment, in the face of aging problems, we should pay attention to the fact that if the seal is now aged, and there are many impurities, water mixtures and oil, then it will affect the touch resistance of the brush, resulting in the continuous beating of the displayed numbers.
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Single receiver and multiple receiver for photoelectric sensors
Photoelectric sensors are generally composed of three parts: transmitter, receiver and detection circuit, and its operating principle is to first convert the measured change into the change of the optical signal, and then convert the change of the optical signal into the change of the electrical signal (this part is called the "photoelectric effect"). According to the detection method, it is not ...
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Our basic sensor detection method
1. Proximity sensing.
Proximity usually refers to exploration:
a. Whether the target exists.
The scale or abbreviated shape of an object.
Proximity sensors can be divided into touch, non-touch, and imitation. The choice of sensor depends on physical, environmental, and control conditions.
Machine...
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Wiring of weighing strain gauge tension and compression sensors – we are in control
Wiring method of weighing strain tension and compression sensor:
Strain gauge tension and compression load cells can be wired in two different input and output wiring methods:
The first is the four-wire connection method.
The load cell of the four-wire connection method has no special requirements for the secondary instrument panel, and it is very convenient to use.
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Classification and principle of displacement sensors
According to the principle of operation:
Potentiometer-type displacement sensor
It converts the mechanical displacement through the potentiometer element into a resistive or voltage output that is linearly or arbitrarily linked to it. Generally, linear potentiometers and round potentiometers can be used as linear and angular displacement sensors, respectively. ...
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Industrial applications of rotary encoders
Rotary encoders are a class of sensors used to detect the angle of rotation and its derived mechanical parameters, including velocity and acceleration, etc., and can detect transmission movements such as rotation and linear lines. Due to its widespread use, rotary encoders convert mechanical inputs into electrical signals, which can be used by counters, tachometers, programmable...
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The application of P+F sensors
Positioning, Navigation, Sorting...... The completion of various functions of mobile robots can be said to be inseparable from the role of sensors, and with the continuous expansion of the scope of use of mobile robots, the environment they face is more complex and diverse, and the requirements for sensors are also constantly improving.
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Benefits and features of our industrial sensors
The R2 and R3 series of photoelectric sensors are impressive products that characterize a very small housing plan. Robust R2/R3 miniature photoelectric sensors – smaller than a matchbox, space-saving miniature housing photoelectric sensors R2/R3 series ...
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The difference between a force transducer and a load cell – we are blessed
A device that converts the value of a force transducer into an associated electrical signal. Force is the direct cause of changes in the motion of materials. Force sensors can detect tension, tension, pressure, components, torque, internal stresses, and strains. The specific equipment is metal strain gauges, pressure sensors, etc., which have become electric ...
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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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How to choose an accelerometer
First, understand the digital output part. When purchasing an accelerometer sensor, you must understand the digital output, because this determines the interface between the system and the acceleration sensor, if the number does not correspond, it is inconvenient to use, so you must understand the data at the time of selection.
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Application features of rotary incremental encoders
The rotary incremental encoder outputs pulses when it rotates, knows its orientation by the counting device, and remembers the orientation by relying on the internal memory of the counting device when the encoder does not move or the power goes out. In this way, when the power goes out, the encoder can not have any movement, and when the call is working, the encoder ...
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What are the designs of torque sensors – we are blessed
Unlike load cells or force transducers, the measuring body of a torque transducer is not subjected to a tension load during operation, but is affected by the lever torque or torque, which can be changed. Therefore, torque sensors require special strain gauges to measure this type of load, i.e. torque. Canon...
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Precautions for the installation of single-point load cells – we are blessed
1. Single-point load cells should be handled with care, especially for small capacity sensors with alloy aluminum as elastomers, any vibration-induced impact or drop is likely to cause large output errors.
2. Design loading ...
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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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How torque sensors work – we are blessed
Like many other types of sensors, torque sensors are measured using strain gauge technology. The sensor is usually a metal elastomer with a strain gauge mounted on it. Strain gauges are firmly attached to the elastomer.
If an external load acts on the sensor, the measuring body will ...
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Important things to do with your torque sensor – we are blessed
In the process of application, the sensor will inevitably be affected by the environment, temperature, dust and other factors, so that the equipment is aging or wearing, and if these problems are not dealt with in time, it will bury potential troubles for the future use of the equipment, resulting in large and small problems, and ...
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Proximity sensor requirements for CNC machines – BEBB
Because of its high precision, high speed and reliability, CNC machine tools have been rapidly spread throughout the enterprise in the upgrading of manufacturing technology and equipment. CNC machine tool is an automatic machine tool equipped with a program control system, which makes the machine tool move and process parts according to the programmed program. It...
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Wireless HART technology for industrial processes
WirelessHART uses the 2.4 GHz band (which is no-nonsense and globally) as a transmission medium for a variety of radio skills, including WLAN, Bluetooth, and ZigBee. However, WirelessHART is more than just a variant of WLAN.
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Precautions for installation during the use of encoders
First of all, the following points should be paid attention to when wiring the encoder:
1. It is necessary to use a metal cable bracket and ensure that the bracket connection is connected to the ground;
2. The cable should be arranged as close to the metal parts as possible, such as control cabinet panels, beams and metal rails, etc.
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