CN-121977420-A - Displacement sensor processing method and device, storage medium and electronic equipment

CN121977420ACN 121977420 ACN121977420 ACN 121977420ACN-121977420-A

Abstract

The application discloses a processing method, a device, a storage medium and electronic equipment of a displacement sensor, wherein an AMT gear shifting executing mechanism is hoisted to calibration equipment, the calibration equipment comprises a high-precision positioning mechanism, a displacement sliding table, a displacement ruler and a driving mechanism, the driving mechanism is used for driving the displacement sliding table to move along a preset track, the driving mechanism is used for driving the displacement sliding table to move, a target shaft in the AMT gear shifting executing mechanism is linked to move in the range of the target shaft, a voltage value of the displacement measuring value of the displacement ruler and a voltage value of the displacement sensor of the AMT gear shifting executing mechanism are obtained at each displacement point, when the target shaft moves, the relative position between a magnetic core on the target shaft and the displacement sensor is changed, a calibration curve is established by adopting a polynomial fitting algorithm based on the voltage value corresponding to the displacement measuring value, and the calibration curve comprises a mapping relation between the displacement measuring value and the voltage value, and the calibration curve is written into the displacement sensor through CAN communication of a controller local area network.

Inventors

LI SUZHOU
ZHAO BING
LI ZHONG
NIE BIN
HUANG GUANGHUI
HU YIYONG
LI JIN

Assignees

常州易控汽车电子股份有限公司

Dates

Publication Date: 20260505
Application Date: 20251231

Claims (10)

1. The utility model provides a displacement sensor's processing method which characterized in that, hoist AMT actuating mechanism to demarcation equipment, demarcation equipment includes high accuracy positioning mechanism, displacement slip table, displacement chi and actuating mechanism, actuating mechanism is used for driving the displacement slip table moves along preset track, the method includes: The driving mechanism drives the displacement sliding table to move, a target shaft in the AMT gear shifting executing mechanism is linked to move in the range of the target shaft, and a displacement measured value of a displacement ruler and a voltage value of a displacement sensor of the AMT gear shifting executing mechanism are obtained at each displacement point, wherein when the target shaft moves, the relative position between a magnetic core on the target shaft and the displacement sensor is changed; Based on the displacement measured value and the voltage value corresponding to the displacement measured value, a polynomial fitting algorithm is adopted to establish a calibration curve, and the calibration curve comprises a mapping relation between the displacement measured value and the voltage value; and writing the calibration curve into the displacement sensor through Controller Area Network (CAN) communication.
2. The method according to claim 1, wherein the method further comprises: And updating the calibration curve in real time through an algorithm based on the attenuation factors and dynamic learning.
3. The method of claim 2, wherein prior to updating the calibration curve in real-time by an algorithm based on an attenuation factor and dynamic learning, the method further comprises: monitoring the actual ambient temperature of the AMT gear shifting executing mechanism through a temperature sensor; And determining a displacement correction amount corresponding to the actual ambient temperature according to the actual ambient temperature and a preset temperature displacement mapping relation, and correcting a displacement measured value in the calibration curve according to the displacement correction amount, wherein the preset temperature displacement mapping relation comprises a mapping relation between the environment temperature calibrated in advance and the displacement correction amount.
4. The method of claim 1, wherein the preset measurement system interfaces with a shift fork in an AMT shift actuator, the method further comprising: After calibration is completed, the displacement sliding table and the driving mechanism are restored to an initial state, wherein the initial state is a state that the displacement sliding table is positioned at the initial endpoint of a preset track, the driving mechanism does not output driving force, and no linkage acting force exists between the displacement sliding table and the target shaft; driving the AMT gear shifting executing mechanism to simulate gear shifting action through control software, and acquiring a displacement value measured by the displacement sensor; obtaining a displacement value of the target shaft measured by the preset measuring system through a shifting fork; And comparing and acquiring the displacement value measured by the displacement sensor with the displacement value measured by the preset measurement system, and judging whether the AMT gear shifting executing mechanism is qualified or not.
5. The method of any one of claims 1-4, wherein the drive mechanism comprises a cylinder body, a cylinder ram, and an electric cylinder ram; the cylinder ejector rod and the electric cylinder ejector rod are respectively positioned at two axial sides of the target shaft to form a bidirectional positioning layout; The cylinder ejector rod is connected with the cylinder body in a telescopic sliding fit manner, one end of the cylinder ejector rod is fixed with a piston in the cylinder body, the other end of the cylinder ejector rod extends out of the cylinder body and is coaxially arranged with the cylinder body along the axial direction of the target shaft, and the free end of the cylinder ejector rod is arranged corresponding to a first limiting reference surface of the target shaft; One end of the electric cylinder ejector rod is fixedly connected with the displacement sliding table, and the other end of the electric cylinder ejector rod is a free end and is arranged corresponding to a second limiting reference surface of the target shaft; The high-precision positioning mechanism is fixedly assembled on a reference rack of the calibration equipment and is used for providing integral positioning reference support for the AMT gear shifting executing mechanism; the displacement ruler is fixedly arranged along the movement direction of the displacement sliding table, and the detection end of the displacement ruler is rigidly connected with the movement main body of the displacement sliding table so as to synchronously acquire the displacement data of the displacement sliding table.
6. The method of claim 5, wherein prior to moving the displacement ramp by the drive mechanism, linking the target shaft in the AMT shift actuator to move within its range of range, the method further comprises: Hoisting the AMT gear shifting executing mechanism to a preset assembly area of the calibration equipment, enabling a positioning pin of the AMT gear shifting executing mechanism to be embedded with a positioning hole on a reference rack of the calibration equipment, and completing preliminary reference alignment of the AMT gear shifting executing mechanism and the calibration equipment; Starting a cylinder in the driving mechanism, introducing compressed gas to drive a piston in the cylinder body to move, driving a cylinder ejector rod to extend out along the axial direction, and propping up a first limiting reference surface of the target shaft to realize positioning and fixing of one side of the target shaft; The driving mechanism drives the displacement sliding table to move towards the direction of the target shaft, so that the free end of the electric cylinder ejector rod is precisely attached to the second limiting reference surface of the target shaft, then the driving mechanism stops working, the displacement sliding table is controlled to reset to the initial end point of the preset track, and the displacement reference return to zero of the displacement sliding table and the electric cylinder ejector rod is completed.
7. The utility model provides a processing apparatus of displacement sensor, its characterized in that, hoist AMT actuating mechanism of shifting to demarcation equipment on, demarcation equipment includes high accuracy positioning mechanism, displacement slip table, displacement chi and actuating mechanism, actuating mechanism is used for the drive displacement slip table moves along preset track, the device includes: the acquisition unit is used for acquiring a displacement measured value of a displacement ruler and a voltage value of a displacement sensor of the AMT shift actuating mechanism at each displacement point under the condition that the driving mechanism drives the displacement sliding table to move and a target shaft in the AMT shift actuating mechanism is linked to move in a range of the target shaft, wherein when the target shaft moves, the relative position between a magnetic core on the target shaft and the displacement sensor is changed; the establishing unit is used for establishing a calibration curve by adopting a polynomial fitting algorithm based on the displacement measured value and the voltage value corresponding to the displacement measured value, wherein the calibration curve comprises a mapping relation between the displacement measured value and the voltage value; And the writing unit is used for writing the calibration curve into the displacement sensor through Controller Area Network (CAN) communication.
8. The apparatus of claim 7, wherein the drive mechanism comprises a cylinder body, a cylinder ram, and an electric cylinder ram; the cylinder ejector rod and the electric cylinder ejector rod are respectively positioned at two axial sides of the target shaft to form a bidirectional positioning layout; The cylinder ejector rod is connected with the cylinder body in a telescopic sliding fit manner, one end of the cylinder ejector rod is fixed with a piston in the cylinder body, the other end of the cylinder ejector rod extends out of the cylinder body and is coaxially arranged with the cylinder body along the axial direction of the target shaft, and the free end of the cylinder ejector rod is arranged corresponding to a first limiting reference surface of the target shaft; One end of the electric cylinder ejector rod is fixedly connected with the displacement sliding table, and the other end of the electric cylinder ejector rod is a free end and is arranged corresponding to a second limiting reference surface of the target shaft; The high-precision positioning mechanism is fixedly assembled on a reference rack of the calibration equipment and is used for providing integral positioning reference support for the AMT gear shifting executing mechanism; the displacement ruler is fixedly arranged along the movement direction of the displacement sliding table, and the detection end of the displacement ruler is rigidly connected with the movement main body of the displacement sliding table so as to synchronously acquire the displacement data of the displacement sliding table.
9. A non-transitory computer readable storage medium, on which a computer program is stored, characterized in that the program, when executed by a processor, implements the method according to any of claims 1-6.
10. An electronic device, the electronic device comprising: One or more processors; The processor is coupled with a storage device for storing one or more programs; The one or more programs, when executed by the one or more processors, cause the electronic device to implement the method of any of claims 1-6.

Description

Displacement sensor processing method and device, storage medium and electronic equipment Technical Field The present application relates to the field of vehicle technologies, and in particular, to a method and apparatus for processing a displacement sensor, a storage medium, and an electronic device. Background In the production and detection of a gear shifting actuator of an automobile AMT (Automated Mechanical Transmission, electrically controlled mechanical automatic transmission), calibration of a displacement sensor is a key link for ensuring gear shifting precision and reliability. The AMT system monitors the gear selection and the gear shifting direction and the displacement of the gear shifting head in real time through the displacement sensor, so that the gear switching of the gearbox is accurately controlled. The calibration process of the displacement sensor aims at establishing an accurate corresponding relation between an output signal (such as voltage) and an actual displacement amount of the displacement sensor so as to eliminate the influence of sensor nonlinearity, hysteresis error, quantization error, mechanical error, installation error and the like on measurement accuracy. Currently, calibration of AMT displacement sensors mainly adopts a "parts control method". The method ensures that the sensor meets the preset displacement requirement after assembly by strictly controlling the dimensional tolerance of high-precision parts and assembling a dimensional chain. Specifically, the method relies on precise machining and assembly processes, and when the sensor is installed, the output signal of the sensor is indirectly influenced by adjusting a mechanical structure (such as a box body, a piston and a shifting fork) so as to be matched with the theoretical displacement. However, this method is highly dependent on the quality and stability of the parts, on the process stability of the production process, and is difficult to dynamically adapt to the change of the sensor characteristics with the environment or the service time. Disclosure of Invention The application provides a processing method and device of a displacement sensor, a storage medium and electronic equipment, and can solve the technical problem generated by a part control method. The specific technical scheme is as follows: in a first aspect, an embodiment of the present application provides a method for processing a displacement sensor, hoisting an AMT shift actuating mechanism to a calibration device, where the calibration device includes a high-precision positioning mechanism, a displacement sliding table, a displacement ruler, and a driving mechanism, where the driving mechanism is used to drive the displacement sliding table to move along a preset track, and the method includes: The driving mechanism drives the displacement sliding table to move, a target shaft in the AMT gear shifting executing mechanism is linked to move in the range of the target shaft, and a displacement measured value of a displacement ruler and a voltage value of a displacement sensor of the AMT gear shifting executing mechanism are obtained at each displacement point, wherein when the target shaft moves, the relative position between a magnetic core on the target shaft and the displacement sensor is changed; Based on the displacement measured value and the voltage value corresponding to the displacement measured value, a polynomial fitting algorithm is adopted to establish a calibration curve, and the calibration curve comprises a mapping relation between the displacement measured value and the voltage value; and writing the calibration curve into the displacement sensor through Controller Area Network (CAN) communication. In one possible embodiment, the method further comprises: And updating the calibration curve in real time through an algorithm based on the attenuation factors and dynamic learning. In one possible embodiment, before updating the calibration curve in real time by an algorithm based on an attenuation factor and dynamic learning, the method further comprises: monitoring the actual ambient temperature of the AMT gear shifting executing mechanism through a temperature sensor; And determining a displacement correction amount corresponding to the actual ambient temperature according to the actual ambient temperature and a preset temperature displacement mapping relation, and correcting a displacement measured value in the calibration curve according to the displacement correction amount, wherein the preset temperature displacement mapping relation comprises a mapping relation between the environment temperature calibrated in advance and the displacement correction amount. In one possible embodiment, the preset measurement system interfaces with a fork in an AMT shift actuator, the method further comprising: After calibration is completed, the displacement sliding table and the driving mechanism are restored to an initial state, wherein the