Coder, external diagnosis equipment and on-line diagnosis and adjustment method

Abstract

The invention relates to the field of communication, and discloses a coder, external diagnosis equipment and an on-line diagnosis and adjustment method. The on-line diagnosis and adjustment method includes the following steps that if the basic state of the coder is normal, the external diagnosis equipment reads operation parameters of the coder from a register in the coder through an I2C interface in the coder, wherein the operation parameters include the amplitude value, direct-current offset and phase of an output signal of the coder; the external diagnosis equipment determines the operation state of the coder according to the operation parameters, and adjusts the operation parameters according to the operation state until the operation parameters are within a preset range, and otherwise it is judged that the coder is abnormal. In this way, the external diagnosis equipment can remotely read the operation parameters in the register in the coder on line through the I2C driving interface and remotely adjust the operation parameters on line, it is unnecessary to repair the coder through disassembling the coder, then the design complexity is lowered, and the adjustment reliability of the coder is improved.

Description

technical field [0001] The invention relates to the communication field, in particular to an encoder, an external diagnosis device and an online diagnosis and adjustment method. Background technique [0002] During the commissioning and operation of the elevator, the encoder plays an important role. However, due to the harsh operating environment of the elevator, the encoder is prone to problems such as no signal output, pulse loss caused by output signal amplitude offset changes, and system failure caused by output signal phase changes. At the same time, sometimes there is no problem with the encoder itself, but changes in the surrounding environment will also cause the system to report an encoder error. [0003] In the above cases, it is necessary to evaluate whether the encoder is damaged and the degree of damage and adjust according to the situation. At present, most encoders on the market are fixed and integrated. When there is a problem with the encoder, the only way...

AI Technical Summary

Problems solved by technology

However, in this scheme, the amplitude and DC offset need to be adjusted by adding a digital potentiometer with a communication interface, and an additional phase adjustment circuit needs to be added for phase adjustment

Obviously, this scheme increases the complexity of the design and reduces the reliability of the encoder adjustment

Images