Spring length detection control method and detection control system

Abstract

The invention discloses a spring length detection control method and detection control system. The influence of the temperature and humidity in the environment and other interference factors are considered in spring length tolerance measurement, a zero tolerance comprehensive value Z is set, and compensation is made for the zero tolerance comprehensive value Z according to the current temperatureand humidity values and the measured tolerance value of a currently produced spring, in order to minimize the influence of the environment on spring length tolerance. A modulation and amplification circuit is improved, and the problem that the existing modulation and amplification circuit responds slowly and is easily affected by temperature and humidity is overcome. A system zeroing scheme is optimized, and a zeroing mode combining coarse adjustment and fine adjustment and combining analog and digital is adopted. Therefore, the zeroing efficiency and accuracy are improved, and the service life of a zero potentiometer is prolonged.

Description

technical field [0001] The invention relates to a detection method and a detection control system, in particular to a spring length detection control method and a detection control system. Background technique [0002] Springs are often used in some precision electromechanical equipment. In these applications requiring high precision, the relative error range of the spring length during assembly is required to be within ±0.2mm. The precision control of the length has higher requirements. However, traditional contact measurement cannot meet this requirement, so a non-contact spring detection control system based on microcapacitance sensors has emerged. Its main principle is to use the sensor end face as a capacitive plate of The fixed plate, the measured end face of the spring is used as another capacitive plate of the variable gap capacitive sensor, that is, the movable plate of the capacitive sensor, such as figure 1 shown. The end face of the sensor is fixed on the fron...

AI Technical Summary

Problems solved by technology

[0004] The non-contact spring detection control system in the prior art, like the utility model patent CN 204396752U, has the following problems: 1. The weak signal input to the controller will have a slow response speed after being processed by the bridge, and is easily affected by temperature and humidity 2. After the machine has been working for a period of time, the tolerance error caused by temperature and humidity changes is too much, and it needs to be stopped and re-adjusted at regular intervals; 3. I am not aware of the influence of the humidity parameter on the system measurement results, and have not responded to the humidity change 4. There are too many electronic components on the industrial control board used in the controller, which not only costs high, but also dissipates more heat, which has higher requirements for its cooling system; Digital compensation scheme; 6. Operations such as zero point adjustment are knob-type mechanical adjustments, which are basically controlled by humans. When the zero adjustment potentiometer is rotated a little, the number changes greatly, which makes zero adjustment difficult and affects efficiency and accuracy.

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