A linear displacement sensor is an electrical signal device that converts the linear mechanical displacement into a linear or arbitrary function connection through the potentiometer element. In order to achieve the purpose of measuring displacement, the potentiometer must require a confirmed link between the change in displacement and the change in resistance. Generally, the variable resistance slide rail is fixed on the fixed part of the sensor, and different resistance values are measured by the displacement of the slide blade on the slide rail.
Application Requirements:
1. Ensure the stability of the power supply
The power supply requires ± 0.1% stability, otherwise it will lead to the manifestation of the scam to waver. It is necessary to ensure that the fluctuations of the apparent scam do not exceed the fluctuations of the shaking voltage.
2. Prevent disturbance caused by static electricity
The measures to prevent electrostatic disturbance are: the signal line of the displacement sensor adopts a shielded wire, and the duct is arranged separately from the power line; The electronic ruler is installed on the bracket of forced grounding to ensure that the electronic ruler shell is well grounded; The shielded wire of the signal is grounded at one end of the electrical box. When the electronic ruler shows the digital jump, there is generally a disturbance signal in it, and the voltage can be used with a multimeter. To verify whether it is caused by static electricity, you can use a section of power cord to short the cover screw of the electronic ruler with a certain point of metal on the machine, and then the static electricity disturbance will be eliminated immediately.
Third, the connection of the three lines of the electronic ruler
The "1" and "3" lines are the power cables, and the "2" lines are the output lines. If these three lines are connected incorrectly, a large linear error will occur.
Fourth, the requirements of power supply capacity
If the power supply capacity is too small, it is easy to cause the clamping motion to cause the injection tape to jump, or the melt motion to cause the clamping ruler to wave. Especially when the solenoid valve drive power supply and the electronic ruler power supply are together, it is easy to present this situation, and the voltage level of the multimeter can be measured to the voltage fluctuation when it is severe. If this situation occurs, first of all, it is not possible to solve the problem if it is not electrostatic disturbance and high-frequency disturbance, and the problem cannot be solved under the condition that the neutral is not good, then it can be suspected that the power of the power supply is too small.
Fifth, the installation should be good for neutralization
The angle tolerance is not more than 12°, and the parallelism tolerance is not more than 0.5mm, if both errors are too large, it will cause the number to jump. If this is the case, the angle and parallelism will need to be adjusted.
6. Prevent short circuit
In the process of linear displacement sensor electronic ruler operation, there is a regular data jumping or no data at a certain point, and in this case, it is necessary to check whether the insulation of the connecting wire is damaged and has a regular touch with the metal shell of the machine to cause a short circuit to the ground.
7. Avoid aging
If the displacement sensor is exposed to harsh environments for a long time, it is prone to aging, which will affect the touch resistance of the brushes and cause the digital jump. So, it's important to maintain it often.
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