Sensor calibration communication method, sensor and sensor assembly

Abstract

The invention provides a sensor calibration communication method based on a sensor power supply line. The method comprises the steps that S1, calibration equipment modulates an instruction signal to be issued to a sensor into a voltage change signal and couples the voltage change signal to the power supply line of the sensor; s2, a sensor receives the voltage change signal from the power supply line and demodulates the voltage change signal to demodulate the instruction signal; and S3, after the sensor receives the instruction signal, the instruction signal is processed, and a corresponding instruction reply is transmitted back to the calibration equipment. According to the method, sensor communication is realized based on the power supply line of the sensor, an instruction from a calibration device is modulated into a voltage change signal and coupled to the power supply line of the sensor, and an instruction reply is modulated into a current change signal of a power supply loop, so that the anti-interference performance of the communication method is enhanced, and the cost is reduced. The invention further provides a sensor and a sensor assembly comprising the sensor.

Description

TECHNICAL FIELD

[0001] Embodiments of the present disclosure relate to a sensor calibration communication method based on a sensor power supply line, and to a sensor and a sensor assembly comprising the same. BACKGROUND

[0002] Existing sensor calibration communication methods usually require three or more cables, one or two of which are dedicated communication cables, thus resulting in additional material and production costs. In addition, in existing sensor communication methods, the communication cable is usually cut after the sensor is calibrated and when the sensor is assembled, which can result in the inability to calibrate the assembled sensor, thus posing a risk of product scrapping or failure. Furthermore, existing sensor communication methods have poor anti-interference performance and are difficult to adapt to long communication cables. SUMMARY

[0003] One object of the present disclosure aims to solve at least one of the above-mentioned problems and defects in the prior art.

[0004] According to an exemplary embodiment of one aspect of the present disclosure, a sensor calibration communication method based on a sensor power supply line is provided, the method comprising:

[0005] Step S1: a calibration device modulates an instruction signal to be issued to a sensor into a voltage change signal and couples the voltage change signal on a power supply line of the sensor;

[0006] Step S2: the sensor receives the voltage change signal from the power supply line and demodulates the voltage change signal to demodulate the instruction signal;

[0007] Step S3: after receiving the instruction signal, the sensor processes the instruction signal and transmits a corresponding instruction reply back to the calibration device.

[0008] According to an exemplary embodiment of the present disclosure, after receiving the instruction signal, the sensor processes the instruction signal and transmits a corresponding instruction reply back to the calibration device, comprising:

[0009] Step S31: after receiving the instruction signal, the sensor parses the instruction signal and replies the instruction signal in the form of voltage waveform change; and

[0010] Step S32: the instruction reply is modulated into a current change signal of a power supply loop of the sensor by a voltage-to-current circuit of the sensor to transmit the instruction reply back to the calibration device.

[0011] According to an exemplary embodiment of the present disclosure, the method further comprises a step S4 of receiving, by the calibration device, the instruction reply of the sensor by detecting a current variation in the power supply loop.

[0012] According to an exemplary embodiment of the present disclosure, in step S2, the sensor demodulates the voltage variation signal from the calibration device on the power supply line by a capacitance-resistance circuit to demodulate the instruction signal.

[0013] According to an exemplary embodiment of the present disclosure, the high voltage level of the voltage variation signal is 24V and the low voltage level is 16V.

[0014] According to an exemplary embodiment of the present disclosure, the duty cycle of the voltage variation signal is 0.75.

[0015] According to an exemplary embodiment of the present disclosure, the high current level of the current variation signal is 16mA and the low current level is 6mA.

[0016] According to an exemplary embodiment of the present disclosure, the sensor is at least one of a 2-wire current sensor, a 3-wire current sensor, a voltage analog sensor, and a digital sensor.

[0017] According to an exemplary embodiment of another aspect of the present disclosure, a sensor is also provided, which is calibrated by the method according to the present disclosure.

[0018] According to an exemplary embodiment of still another aspect of the present disclosure, a sensor assembly is also provided, which comprises the sensor according to the present disclosure, and a calibration device configured to calibrate the sensor.

[0019] Other objects and advantages of the present disclosure will become apparent and help to understand the present disclosure from the following description of the present disclosure with reference to the accompanying drawings. BRIEF DESCRIPTION OF DRAWINGS

[0020] Fig. 1 is a schematic diagram of a sensor power supply line-based sensor calibration communication method according to an exemplary embodiment of the present disclosure;

[0021] Fig. 2 is a circuit diagram of a sensor power supply line-based sensor calibration communication method according to an exemplary embodiment of the present disclosure; and

[0022] Fig. 3 is a flowchart of a sensor power supply line-based sensor calibration communication method according to an exemplary embodiment of the present disclosure. DETAILED DESCRIPTION

[0023] While this disclosure will be fully described with reference to the accompanying drawings containing preferred embodiments, it should be understood before this description that those skilled in the art can modify the disclosure described herein to obtain the technical effects of this disclosure. Therefore, it should be understood that the above description is a broad disclosure to those skilled in the art and is not intended to limit the exemplary embodiments described herein.

[0024] Furthermore, in the following detailed description, numerous specific details are set forth for ease of explanation to provide a thorough understanding of the embodiments disclosed herein. However, it will be apparent that one or more embodiments may be practiced without these specific details. In other instances, well-known structures and apparatuses are illustrated to simplify the figures.

[0025] Based on the general inventive concept of this disclosure, a sensor calibration communication method based on a sensor power supply line is provided. The method includes: step S1: the calibration device modulates the command signal to be sent to the sensor into a voltage change signal and couples it to the power supply line of the sensor; step S2: the sensor receives the voltage change signal from the power supply line and demodulates the voltage change signal to demodulate the command signal; and step S3: after receiving the command signal, the sensor processes the command signal and sends the corresponding command reply back to the calibration device.

[0026] According to another general inventive concept of this disclosure, a sensor is also provided that is calibrated using the methods described in this disclosure.

[0027] In accordance with another general inventive concept of this disclosure, a sensor assembly is also provided, the sensor assembly including the sensor according to this disclosure, and a calibration device configured to calibrate the sensor.

[0028] Because sensors of the same model may have manufacturing differences, they typically require a precise calibration process before leaving the factory to ensure their performance and measurement accuracy, meeting user requirements for quality and reliability. Calibration makes the output of sensors of the same model more consistent, enhancing product uniformity and facilitating user application and maintenance. Existing sensors typically include a sensor body and a power supply line connected to the sensor body, which is used to connect to a power source to supply power to the sensor body.

[0029] like Figs. 1 to 3 As shown, a sensor calibration communication method based on a sensor power supply line according to an exemplary embodiment of this disclosure includes:

[0030] Step S1: the calibration device modulates an instruction signal to be sent to the sensor into a voltage change signal and couples the voltage change signal on a power supply line of the sensor;

[0031] Step S2: the sensor receives the voltage change signal from the power supply line and demodulates the voltage change signal to demodulate the instruction signal; and

[0032] Step S3: after receiving the instruction signal, the sensor processes the instruction signal and transmits a corresponding instruction reply back to the calibration device.

[0033] In this way, the sensor can realize power supply of the sensor through the power supply line, and at the same time, the calibration device modulates an instruction signal to be sent to the sensor into a voltage change signal and couples the voltage change signal on the power supply line of the sensor itself, so as to realize sending of a communication signal to the sensor, that is, multiplexing the power supply line of the sensor itself. In this way, a communication cable specially used for signal transmission is saved, material is saved, production cost is reduced, and after the sensor is assembled, the communication signal can still be sent to the sensor through the power supply line to recalibrate the sensor, so as to reduce the risk of finished product scrapping. It should be noted that in some other embodiments of the present disclosure, the calibration device can also modulate an instruction signal to be sent to the sensor into a current change signal and couple the current change signal on the power supply line of the sensor to realize sending of a communication signal to the sensor.

[0034] In an exemplary embodiment, as shown in Fig. 2 and Fig. 3 after receiving the instruction signal, processing the instruction signal and generating a corresponding instruction reply, and then transmitting the instruction reply back to the calibration device, the sensor comprises:

[0035] Step S31: after receiving the instruction signal, the sensor analyzes the instruction signal and replies to the instruction signal in the form of voltage waveform change; and

[0036] Step S32: modulating the instruction reply into a current change signal of a power supply loop of the sensor through a voltage-to-current circuit of the sensor to transmit the instruction reply back to the calibration device.

[0037] The sensor calibration communication method saves the communication cable for returning the instruction reply to the calibration device, thereby further saving materials and reducing production costs. In addition, according to the embodiment of the present disclosure, the sensor calibration communication method enhances the anti-interference of the communication method and can adapt to different communication cable lengths by modulating the instruction signal from the calibration device into a voltage change signal and coupling it on the power supply line of the sensor itself, and the instruction reply is modulated by the current in the power supply loop of the sensor itself.

[0038] In an exemplary embodiment, the sensor calibration communication method can further include step S4: the calibration device receives the instruction reply of the sensor by detecting the current change in the power supply loop.

[0039] Specifically, according to the embodiment of the present disclosure, the sensor demodulates the voltage change signal from the calibration device on the power supply line through the resistance-capacitance circuit to demodulate the instruction signal.

[0040] In an exemplary embodiment, the high voltage level of the voltage change signal is 24V, and the low voltage level is 16V. It should be noted that in other embodiments of the present disclosure, the high voltage level and the low voltage level of the voltage change signal can also be other values, and the specific values can be designed according to specific conditions.

[0041] In an exemplary embodiment, the duty cycle of the voltage change signal is 0.75. It should be noted that in other embodiments of the present disclosure, the duty cycle of the voltage change signal can also be other values, and the specific values can be designed according to specific conditions.

[0042] In an exemplary embodiment, the high current level of the current change signal is 16mA, and the low current level is 6mA. It should be noted that in other embodiments of the present disclosure, the high current level and the low current level of the current change signal can also be other values, and the specific values can be designed according to specific conditions.

[0043] In an exemplary embodiment, the sensor can be at least one of a 2-wire current sensor, a 3-wire current sensor, a voltage analog sensor, and a digital sensor.

[0044] According to another aspect of the present disclosure, a sensor calibrated by the method according to the embodiment of the present disclosure is also provided.

[0045] According to still another aspect of the present disclosure, a sensor assembly is also provided, which includes the sensor according to the embodiment of the present disclosure, and a calibration device configured to calibrate the sensor.

[0046] According to the sensor calibration communication method based on the sensor power supply line according to the various embodiments of the present disclosure, the communication signal is sent to the sensor by modulating the instruction signal into a voltage change signal and coupling it on the power supply line of the sensor itself, that is, multiplexing the power supply line of the sensor itself, so that the communication cable specially used for signal transmission is saved, thus saving the materials and reducing the production cost. In addition, the sensor calibration communication method can also return the instruction reply to the calibration device by modulating the current change in the power supply line loop of the sensor itself, so that the communication cable for returning the signal to the calibration device is saved, thus further saving the materials and reducing the production cost. In addition, the sensor can be recalibrated at any time (even after the sensor is assembled), thus reducing the risk of finished product scrapping. In addition, according to the sensor calibration communication method of the present disclosure, the instruction signal from the calibration device is modulated into a voltage change signal and coupled on the power supply line of the sensor itself, and the instruction reply is modulated by the current in the power supply loop of the sensor itself, which enhances the anti-interference of the communication method and can adapt to different communication cable lengths.

[0047] Those skilled in the art can understand that the above-described embodiments are exemplary, and those skilled in the art can make improvements, and the structures described in various embodiments can be freely combined without structural or principle conflicts.

[0048] Although the present disclosure is described in conjunction with the drawings, the embodiments disclosed in the drawings are intended to exemplarily illustrate the preferred embodiments of the present disclosure, and cannot be understood as a limitation of the present disclosure.

[0049] Although some embodiments of the present general inventive concept have been shown and described, it will be understood by those having ordinary skill in the art that changes can be made in these embodiments without departing from the principles and spirit of the general inventive concept, and the scope of the present disclosure is defined by the claims and their equivalents.

[0050] It should be noted that the word "comprising" does not exclude other elements or steps, and the word "a" or "one" does not exclude a plurality. In addition, any reference signs in the claims should not be understood as limiting the scope of the present disclosure.

Claims

1. A sensor calibration communication method based on a sensor power supply line, the method comprising: Step S1: The calibration device modulates the command signal to be sent to the sensor into a voltage change signal and couples it onto the power supply line of the sensor; Step S2: The sensor receives the voltage change signal from the power supply line and demodulates the voltage change signal to obtain the command signal; as well as Step S3: After receiving the command signal, the sensor processes the command signal and sends the corresponding command reply back to the calibration device.

2. The sensor calibration communication method according to claim 1, wherein, After receiving the command signal, the sensor processes the command signal and sends the corresponding command reply back to the calibration device, including: Step S31: After receiving the command signal, the sensor parses the command signal and replies with a voltage waveform change; and Step S32: The command response is modulated into a current change signal of the power supply circuit of the sensor through the voltage-to-current circuit of the sensor, so as to transmit the command response back to the calibration device.

3. The sensor calibration communication method according to claim 2, wherein, The method further includes step S4: the calibration device receives a command response from the sensor by detecting the current change in the power supply circuit.

4. The sensor calibration communication method according to claim 2, wherein, In step S2, the sensor demodulates the voltage change signal from the calibration device on the power supply line through an RC circuit to demodulate the command signal.

5. The sensor calibration communication method according to claim 2, wherein, The high voltage level of the voltage change signal is 24V, and the low voltage level is 16V.

6. The sensor calibration communication method according to claim 2, wherein, The duty cycle of the voltage change signal is 0.

75.

7. The sensor calibration communication method according to claim 2, wherein, The high current level of the current change signal is 16mA, and the low current level is 6mA.

8. The sensor calibration communication method according to any one of claims 1 to 6, wherein, The sensor is at least one of a 2-wire current sensor, a 3-wire current sensor, a voltage analog sensor, or a digital sensor.

9. A sensor calibrated using the method according to any one of claims 1 to 7.

10. A sensor assembly comprising the sensor of claim 9, and a calibration device configured to calibrate the sensor.

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