An analog torque sensor designed based on ne555 for eps

Abstract

The invention discloses an analog torque sensor designed based on NE555 for EPS; it includes two circuit systems, both of which include NE555 chips, and the second pins of the two NE555 chips are electrically connected respectively. A diode D2 and a diode D4 are connected, one end of the diode D2 is electrically connected to a resistor R2, one end of the diode D4 is electrically connected to a resistor R6, and one end of the resistor R2 is electrically connected to an RV1A potentiometer, the One end of the resistor R6 is electrically connected to the RV1B potentiometer, one end of the RV1A potentiometer is electrically connected to the resistor R1, and one end of the RV1B potentiometer is electrically connected to the resistor R5; the present invention can output adjustable by adjusting the potentiometer The square wave of the duty cycle simulates the signal of the torque sensor, so that the EPS enters the power-assisted working state, avoiding the tedious process of frequently changing the EPS controller program and the disassembly process during the test, and protecting the structural quality of the EPS controller and the hardware of the EPS controller life.

Description

technical field [0001] The invention belongs to the technical field of torque sensors for EPS, in particular to an analog torque sensor for EPS designed based on NE555. Background technique [0002] During the testing process of EPS (electric power steering) controller, such as life test, temperature test, vibration test, EMC test, etc., it is necessary for the EPS controller to drive the motor to rotate to judge whether the EPS controller is working normally. In the prior art, it is generally possible to test by modifying the EPS controller program and changing it to the rotation program. This method needs to reprogram the EPS controller. For the EPS controller without CAN communication function, the heat sink of the controller needs to be disassembled. Program programming can only be performed after dismantling the controller. This method is time-consuming and laborious. Repeated dismantling of the controller will cause irreversible damage to the sealing of the controller....

AI Technical Summary

Problems solved by technology

In the prior art, it is generally possible to test by modifying the EPS controller program and changing it to the rotation program. This method needs to reprogram the EPS controller. For the EPS controller without CAN communication function, the heat sink of the controller needs to be disassembled. Program programming can only be performed after dismantling the controller. This method is time-consuming and labor-intensive. Repeatedly dismantling the controller for many times will cause irreversible damage to the sealing of the controller.

[0003] Traditional torque sensor integration and EPS assembly mechanical structure, bulky and not easy to carry

In the test of brushless EPS products, it is necessary to use the hand force applied to the input shaft or use a special test bench to judge whether the EPS product is working normally, which is time-consuming and laborious

When collecting the PWM waveform of the EPS controller drive motor, the current situation should be connected to the test bench. The operator turns the steering wheel with one hand and uses the oscilloscope probe to detect the test points of the EPS controller, which is inconvenient to operate.

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