A linear displacement sensor is an electrical signal device that converts the linear mechanical displacement into a linear or arbitrary function relationship through the potentiometer element. In order to achieve the intention of measuring displacement, it is necessary to have a confirmation relationship between the change in displacement and the change in resistance. Usually, the variable resistance slide rail is fixed at the fixed part of the sensor, and the displacement of the slide blade on the slide rail is used to measure different resistance values.
Application Requirements:
1. Ensure the stability of the power supply
The power supply requires ± 0.1% stability, otherwise it will lead to apparent scam fluctuations. Make sure that the fluctuation of the apparent scam does not exceed the fluctuation of the fluctuating voltage.
2. Prevent disturbance caused by static electricity
The measures to prevent electrostatic disturbance include: the signal line of the displacement sensor is shielded and placed in the trunking separated 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. Once these three lines are connected incorrectly, a large linearity error will occur.
Fourth, the requirements of power supply capacity
If the power supply capacity is too small, the following will simply occur: the clamping motion will cause the injection tape to run, or the melt motion will cause the clamping tape to fluctuate. Especially when the solenoid valve drive power supply and the electronic ruler power supply are together, this situation is simply presented, and the voltage fluctuation can be measured with the voltage level of the multimeter in serious cases. If this situation is presented, the primary sweep is not electrostatic disturbance and high-frequency disturbance, and the problem cannot be solved under the condition that the neutral is not good, it can be suspected that the power of the power supply is too small.
Fifth, the installation should be good for neutralization
The viewpoint is allowed to have an error of no more than 12°, and the parallelism is allowed to not exceed 0.5mm. If this is the case, the viewpoint and parallelism will need to be adjusted.
6. Prevent short circuit
During the working process of the electronic ruler of the linear displacement sensor, the data jumps or does not show the data at a certain point, and in this case, it is necessary to check whether the insulation of the connecting wire is damaged and the short circuit to the ground caused by regular contact with the metal shell of the machine.
7. Prevent aging
If the displacement sensor is in a harsh environment for a long time, the aging phenomenon will simply occur, which will affect the touch resistance of the brush, causing the digital jump. So, protect it often.
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