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CN-121977616-A - Inductive measuring system with redundancy function

CN121977616ACN 121977616 ACN121977616 ACN 121977616ACN-121977616-A

Abstract

The disclosure relates to the technical field of measurement, and provides an inductance type measurement system with a redundancy function, which comprises a device body, a sensor and a sensor, wherein the device body is provided with a stator and a rotor; the digital back-end processing system comprises a main digital processing module and a standby digital processing module, the main digital processing module and the standby digital processing module are connected with the at least one signal pickup demodulation module to form a main signal processing channel and a standby signal processing channel, the measuring analog signals are converted into measuring digital signals, and the output control module is used for forming output signals at an output end based on a normal signal channel. Therefore, the inductance type measuring system has redundancy capability, can select output when faults occur, and improves reliability.

Inventors

  • CUI XING

Assignees

  • 上海盛耐科技有限公司

Dates

Publication Date
20260505
Application Date
20260408

Claims (11)

  1. 1. An inductive measurement system with redundancy, comprising: The device comprises a stator, a rotor, a receiving coil assembly, a stator, a rotor, a stator and a stator, wherein the rotor is provided with an excitation coil assembly, the stator is provided with the receiving coil assembly, the receiving coil assembly comprises at least one receiving coil of a code channel, the excitation coil assembly comprises at least one excitation coil of the code channel, and the excitation coils of the code channels are arranged in a one-to-one correspondence manner with the receiving coils, wherein signal parameters of excitation signals in excitation coil units of different code channels are different; the circuit system comprises an analog front-end processing system, a digital back-end processing system and an output control module; The analog front-end processing system comprises a signal pickup demodulation module of at least one code channel, a signal detection module and a signal processing module, wherein the signal pickup demodulation module is connected with a receiving coil of the same code channel and is used for picking up and processing an induction signal of the receiving coil to obtain a measurement analog signal; the digital back-end processing system comprises a main digital processing module and a standby digital processing module, wherein the main digital processing module and the standby digital processing module are connected with at least one signal pickup demodulation module to form a main signal processing channel and a standby signal processing channel, and are used for converting the measurement analog signals into measurement digital signals; The output control module is respectively connected with the main digital processing module and the standby digital processing module, is connected with the output end and is used for forming an output signal at the output end based on the measured digital signals received from the main signal processing channel and the standby signal processing channel.
  2. 2. The inductive measurement system of claim 1, wherein the receive coil assembly includes a primary receive coil and a backup receive coil under each code channel.
  3. 3. The inductive measuring system of claim 1, wherein said analog front-end processing system comprises a primary signal pick-up demodulation module and a secondary signal pick-up demodulation module for each code channel, connected to the receiving coil, said primary signal pick-up demodulation module and secondary signal pick-up demodulation module being respectively and correspondingly connected to the primary digital processing module and secondary digital processing module for accessing the primary signal processing channel and secondary signal processing channel.
  4. 4. The inductive measuring system of claim 3, wherein said primary signal pick-up demodulation module and said backup signal pick-up demodulation module are connected to said receiving coil if there is a separate receiving coil under one code channel, or are correspondingly connected to said primary receiving coil and said backup receiving coil if there is a primary receiving coil and a backup receiving coil under one code channel, respectively.
  5. 5. The inductive measurement system of claim 1, wherein the receive coil comprises a pair of receive coils with signal phases in quadrature.
  6. 6. The inductive measurement system of claim 1, comprising: the fault monitoring module is connected with the output control module and is used for monitoring the working state of the main signal channel and outputting a monitoring signal indicating whether the working state is faulty or not to the output control module; the output control module is used for preferentially forming the output signal at the output end based on the measurement digital signal of the main signal channel, and switching to the output signal formed at the output end based on the measurement digital signal of the standby signal processing channel in response to the failure of the main signal channel.
  7. 7. The inductive measurement system of claim 6, wherein the output control module further allows for switching to an output signal formed at the output based on the measured digital signal of the primary signal processing channel triggered by a signal indicating that the primary signal channel is restored to normal.
  8. 8. The inductive measurement system of claim 6, comprising: the fault monitoring module is connected with the output control module and is used for monitoring the working state of the main signal channel and generating a monitoring signal; The output control module is used for comparing consistency deviation between measured digital signals of the main signal processing channel and the standby signal processing channel, forming an output signal at the output end based on the measured digital signals obtained from the main signal processing channel in response to the consistency deviation does not reach a clear difference threshold, and acquiring monitoring signals through the fault monitoring module in response to the consistency deviation reaches the clear difference threshold so as to determine normal signal channels except the fault signal channels in the main signal processing channel and the standby signal processing channel and forming the output signal at the output end based on the measured digital signals obtained from the normal signal channels.
  9. 9. The inductive measurement system of claim 1, comprising: And the synchronous calibration module is respectively connected with symmetrical signal points in the main signal channel and the standby signal channel, and is used for acquiring consistency deviation between signals of the symmetrical signal points, and adjusting signal processing parameters of a signal processing module where the symmetrical signal points in the main signal channel and/or the standby signal channel are positioned with the aim of reducing the consistency deviation to be within an offset threshold.
  10. 10. The inductive measuring system of claim 3, comprising a main signal pickup demodulation module and a standby signal demodulation module, wherein the main signal pickup demodulation module comprises a standby signal pickup module and a standby signal demodulation module, the main signal pickup module and the standby signal pickup module are connected with a receiving coil to pick up an induction signal, and the main signal demodulation module and the standby signal demodulation module are respectively and correspondingly connected with the main signal pickup module and the standby signal pickup module to demodulate the induction signal to obtain a measurement analog signal; And the synchronous calibration module is connected with the main signal pickup demodulation module and the standby signal pickup demodulation module and is used for acquiring consistency deviation between the measured analog signals output by the main signal pickup demodulation module and the standby signal pickup demodulation module, and adjusting signal processing parameters of the main signal pickup demodulation module and the standby signal pickup demodulation module with the aim of reducing the consistency deviation.
  11. 11. The inductive measurement system of claim 1, comprising a power module for providing power to the primary signal path and the backup signal path via separate output power sources.

Description

Inductive measuring system with redundancy function Technical Field The disclosure relates to the field of measurement technologies, and in particular, to an inductive measurement system with redundancy. Background In the fields of industrial automation and high-precision position detection, the inductive encoder is widely applied due to the advantages of non-contact measurement, strong anti-interference capability and the like. However, the existing inductive encoder still has the problem of low reliability in practical application. On the one hand, the circuit architecture adopts a single-channel signal processing scheme. Under this architecture, once critical components on the circuit (such as the pick-up circuit, the demodulation circuit) fail, or the channel is interrupted due to welding defects, line aging and the like, the overall function of the encoder is immediately lost, and the equipment must be shut down to replace the whole set of encoder components. This not only increases maintenance costs, but also significantly increases downtime, severely affecting production continuity. On the other hand, the circuit architecture of the existing inductive encoder also lacks fault diagnosis capability, and fault positioning generally relies on manual disassembly and point-by-point detection, so that maintenance difficulty and time consumption are further increased. Disclosure of Invention In view of the above-described drawbacks of the related art, an object of the present disclosure is to provide an inductive measuring system with redundancy function, which solves the problems in the related art. The first aspect of the disclosure provides an inductive measuring system with a redundancy function, which comprises a stator and a rotor which are cooperatively arranged, wherein the rotor is provided with an excitation coil assembly, the stator is provided with a receiving coil assembly, the receiving coil assembly comprises at least one receiving coil of a code channel, the excitation coil assembly comprises at least one excitation coil of the code channel and is configured in a one-to-one correspondence manner with the receiving coil, signal parameters of excitation signals in excitation coil units of different code channels are different, a circuit system comprises an analog front end processing system, a digital back end processing system and an output control module, the analog front end processing system comprises at least one signal pickup demodulation module of the code channel and is connected with the receiving coil of the same code channel and is used for picking up and processing induction signals of the receiving coil to obtain measurement analog signals, the digital back end processing system comprises a main digital processing module and a standby digital processing module and is connected with at least one signal pickup demodulation module to form a main signal processing channel and a standby signal processing channel and is used for converting the measurement analog signals into measurement digital signals, and the output control module is connected with the main digital processing module and the standby digital processing module to form the output channel based on the measurement analog signals at the main digital processing module and the standby digital processing module. In an embodiment of the first aspect, the receiving coil assembly includes a primary receiving coil and a secondary receiving coil under each code channel, and the number of the code channels is one or two. In an embodiment of the first aspect, the analog front-end processing system includes a primary signal pickup demodulation module and a standby signal pickup demodulation module under each code channel, which are connected to the receiving coil, and the primary signal pickup demodulation module and the standby signal pickup demodulation module are respectively and correspondingly connected to the primary digital processing module and the standby digital processing module, so as to access the primary signal processing channel and the standby signal processing channel. In an embodiment of the first aspect, if there is an independent receiving coil under one code channel, the active signal pickup demodulation module and the standby signal pickup demodulation module are connected to the receiving coil, or if there is an active receiving coil and a standby receiving coil under one code channel, the active signal pickup demodulation module and the standby signal pickup demodulation module are respectively connected to the active receiving coil and the standby receiving coil correspondingly. In an embodiment of the first aspect, the receive coils comprise a pair of receive coils with signal phases in quadrature. In an embodiment of the first aspect, the inductance type measurement system includes a fault monitoring module connected to the output control module and configured to monitor an operation state of the primary signa