Adaptive temperature compensation device based on multipath voltage acquisition system

Abstract

The utility model discloses a self-adaptive temperature compensation device based on a multipath voltage acquisition system, which comprises an MCU, an ADC acquisition module, a reference source module, a temperature acquisition circuit and a calibration circuit, the MCU is respectively connected with the ADC acquisition module, the reference source module and the temperature acquisition circuit, the reference source module is connected with the calibration circuit, the ADC acquisition module is used for acquiring voltage, and the temperature acquisition circuit is connected with the calibration circuit. The reference source module is used for providing reference voltage, the temperature acquisition circuit is used for acquiring real-time temperature, the calibration circuit is used for calibrating circuit voltage, the MCU fits a real-time compensation curve by acquiring working environment temperature and the reference voltage, real-time compensation is carried out on acquired voltage signals according to the compensation curve, and the MCU is connected with a communication interface. The communication interface is connected with an upper computer, and the MCU can communicate with the upper computer. According to the utility model, compensation calibration can be carried out according to the ambient temperature, so that the consistency and accuracy of voltage acquisition can be still maintained in a wide temperature range, and the use requirements are met.

Description

Technical Field

[0001] The utility model belongs to the technical field of voltage acquisition, and in particular relates to an adaptive temperature compensation device based on a multi-channel voltage acquisition system. Background Art

[0002] Voltage acquisition is a fundamental parameter acquisition process in electronic measurement. It involves measuring and recording the potential difference (i.e., voltage) between two points in a circuit. This process is fundamental to many electrical parameter measurements and is crucial for measurements such as current, field strength, and attenuation. Voltage acquisition relies on specialized equipment and systems that support various communication protocols and data formats to ensure accurate voltage data collection and transmission.

[0003] There are various ways to implement voltage collection, including but not limited to using bus system data collectors, Internet of Things data collectors, Ethernet data collectors, etc. These collectors can support communication protocols such as Modbus RTU or Modbus TCP, and can be programmed to calibrate accuracy and program the address and baud rate to meet different application requirements.

[0004] The accuracy and speed of voltage acquisition are crucial to ensuring data accuracy and real-time performance. However, with technological advancements, existing voltage acquisition technology is unable to meet the demands of emerging applications, such as high-speed data acquisition, remote monitoring, and automated testing. This is especially true as application scenarios become more complex and diverse, and under increasingly harsh operating temperature conditions, such as the -40°C to 125°C range, the temperature characteristics of various system components make it difficult to ensure consistent and accurate voltage acquisition over a wide temperature range.

[0005] Therefore, in order to solve the above technical problems, it is necessary to provide an adaptive temperature compensation device based on a multi-channel voltage acquisition system.

[0006] The information disclosed in this background technology section is only intended to increase the understanding of the overall background of the present invention, and should not be regarded as an admission or any form of suggestion that the information constitutes the prior art already known to those skilled in the art. Utility Model Content

[0007] The purpose of the utility model is to provide an adaptive temperature compensation device based on a multi-channel voltage acquisition system, which can solve the problem of low acquisition accuracy of voltage acquisition under extreme working temperatures.

[0008] In order to achieve the above-mentioned purpose, the technical solution provided by a specific embodiment of the present invention is as follows:

[0009] An adaptive temperature compensation device based on a multi-channel voltage acquisition system includes an MCU, an ADC acquisition module, a reference source module, a temperature acquisition circuit, and a calibration circuit. The MCU is connected to the ADC acquisition module, the reference source module, and the temperature acquisition circuit, respectively. The reference source module is connected to the calibration circuit. The ADC acquisition module is used to acquire voltage, the reference source module is used to provide a reference voltage, the temperature acquisition circuit is used to acquire real-time temperature, and the calibration circuit is used to calibrate the circuit voltage. The MCU collects the working environment temperature and the reference voltage to fit a real-time compensation curve, and performs real-time compensation on the collected voltage signal according to the compensation curve.

[0010] In one or more embodiments of the present invention, the MCU is connected to a communication interface, and the communication interface is connected to a host computer, so that the MCU can communicate with the host computer.

[0011] In one or more embodiments of the present invention, the ADC acquisition module includes an ADC, the ADC is connected to a multi-channel acquisition circuit, and the multi-channel acquisition circuit is connected to a unit under test. The ADC can convert analog voltage signals into digital signals to achieve multi-channel synchronous data acquisition.

[0012] In one or more embodiments of the present invention, the multi-channel acquisition circuit is used to transmit the preliminarily processed voltage signal to the ADC.

[0013] In one or more embodiments of the present invention, the ADC has a resolution of at least 16 bits and an adjustable sampling rate, and can be applied to different application scenarios.

[0014] In one or more embodiments of the present invention, the reference source module includes a group of reference voltage sources, the number of which is at least 2, and the reference sources are 2 different reference sources, so that the MCU can determine the temperature compensation curve through two reference values.

[0015] In one or more embodiments of the present invention, the temperature acquisition circuit is an NTC temperature acquisition circuit, which is used to monitor the working environment temperature of the voltage acquisition system in real time.

[0016] In one or more embodiments of the present invention, the temperature acquisition circuit is a PT100 temperature acquisition circuit, which is used to monitor the working environment temperature of the voltage acquisition system in real time.

[0017] In one or more embodiments of the present invention, the calibration circuit includes several relay switching circuits, and the several relay switching circuits are respectively connected to the multi-channel acquisition circuit. The calibration circuit switches through the relay switching circuits when the system is powered on to accurately calibrate each branch circuit of the system to ensure the accuracy of the collected data.

[0018] In one or more embodiments of the present invention, the relay switching circuit is installed between the ADC acquisition module and the unit under test. The relay switching circuit has an active protection function. When a voltage acquisition channel fails or the measured voltage exceeds the maximum input voltage of the system, the acquisition system and the unit under test are disconnected, thereby playing an active protection role.

[0019] Compared with the existing technology, the adaptive temperature compensation device based on the multi-channel voltage acquisition system of the utility model can perform compensation calibration according to the ambient temperature, thereby maintaining the consistency and accuracy of voltage acquisition in a wide temperature range, meeting the use requirements. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments recorded in the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0021] Figure 1 This is a schematic diagram of a multi-channel synchronous voltage acquisition system based on an adaptive temperature compensation device of a multi-channel voltage acquisition system in one embodiment of the present invention;

[0022] Figure 2 Schematic diagram of a voltage acquisition system of an adaptive temperature compensation device based on a multi-channel voltage acquisition system in one embodiment of the present invention. DETAILED DESCRIPTION

[0023] In order to enable those skilled in the art to better understand the technical solutions of the present invention, the following will be combined with the drawings of the embodiments of the present invention to clearly and completely describe the technical solutions of the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts should fall within the scope of protection of the present invention.

[0024] like Figures 1 to 2 As shown, an adaptive temperature compensation device based on a multi-channel voltage acquisition system in one embodiment of the present invention includes an MCU, an ADC acquisition module, a reference source module, a temperature acquisition circuit and a calibration circuit.

[0025] The MCU is connected to the ADC acquisition module, the reference source module, and the temperature acquisition circuit, respectively. The reference source module is connected to the calibration circuit. The ADC acquisition module is used to acquire voltage, the reference source module is used to provide a reference voltage, and the temperature acquisition circuit is used to acquire real-time temperature. The calibration circuit is used to calibrate the circuit voltage. The MCU collects the operating environment temperature and the reference voltage to fit a real-time compensation curve, and performs real-time compensation on the acquired voltage signal based on the compensation curve.

[0026] like Figures 1 to 2 As shown in the figure, the MCU, as the system's control core, undertakes key tasks such as controlling various circuit components, further processing signals, and communicating with the host computer. By collecting the operating environment temperature and reference source voltage, the MCU fits a compensation curve at the current temperature. This curve then compensates the actual collected voltage value at that temperature to offset the voltage collection error caused by the system's own temperature differences, ensuring that voltage collection maintains precision and accuracy over a wider operating temperature range.

[0027] The MCU is connected to a communication interface, and the communication interface is connected to a host computer, so that the MCU can communicate with the host computer.

[0028] like Figures 1 to 2 As shown, the ADC acquisition module is the core part of the system, responsible for synchronous multi-channel acquisition of the preliminarily processed voltage signal.

[0029] The ADC acquisition module includes an ADC that can convert analog voltage signals into digital signals to achieve multi-channel synchronous data acquisition. The ADC is connected to a multi-channel acquisition circuit, which is connected to a unit under test to achieve multi-channel synchronous data acquisition.

[0030] Preferably, the ADC has a resolution of at least 16 bits and an adjustable sampling rate, and can be applied to different application scenarios.

[0031] like Figures 1 to 2 As shown, the reference source module includes a group of reference voltage sources, the number of which is at least 2, and the reference sources are 2 different reference sources, so that the MCU can determine the temperature compensation curve through two reference values.

[0032] like Figures 1 to 2 As shown, the temperature acquisition circuit is an NTC temperature acquisition circuit or a PT100 temperature acquisition circuit, which is used to monitor the working environment temperature of the voltage acquisition system in real time.

[0033] like Figures 1 to 2As shown, the calibration circuit includes several relay switch circuits, each of which is connected to the multi-channel acquisition circuit. The calibration circuit switches through the relay switch circuits to accurately calibrate each branch circuit of the system when the system is powered on to ensure the accuracy of the collected data.

[0034] The relay switch circuit is installed between the ADC acquisition module and the unit under test. It has an active protection function. When a voltage acquisition channel fails or the measured voltage exceeds the system's maximum input voltage, it disconnects the acquisition system from the unit under test, providing active protection.

[0035] While collecting voltage signals, this application can also perform compensation and calibration based on the ambient temperature. Unlike traditional temperature compensation methods that use fixed compensation curves, this application can fit the compensation curve in real time based on temperature changes, thereby achieving more accurate compensation. Specifically, this application uses an MCU to control the ADC acquisition module to collect ambient temperature in real time, provides a stable reference voltage through a reference source module, and performs temperature compensation and calibration through real-time comparison using a temperature acquisition circuit, thereby improving acquisition accuracy within the temperature range.

[0036] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0037] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. An adaptive temperature compensation device based on a multi-channel voltage acquisition system, characterized in that: The system comprises an MCU, an ADC acquisition module, a reference source module, a temperature acquisition circuit and a calibration circuit. The MCU is respectively connected to the ADC acquisition module, the reference source module and the temperature acquisition circuit. The reference source module is connected to the calibration circuit. The ADC acquisition module is used to acquire voltage, the reference source module is used to provide a reference voltage, the temperature acquisition circuit is used to acquire real-time temperature, and the calibration circuit is used to calibrate the circuit voltage. The MCU acquires the working environment temperature and the reference voltage to fit a real-time compensation curve, and performs real-time compensation on the acquired voltage signal according to the compensation curve.

2. The adaptive temperature compensation device based on a multi-channel voltage acquisition system according to claim 1, characterized in that: The MCU is connected to a communication interface, and the communication interface is connected to a host computer.

3. The adaptive temperature compensation device based on a multi-channel voltage acquisition system according to claim 1, characterized in that: The ADC acquisition module includes an ADC, the ADC is connected to a multi-channel acquisition circuit, and the multi-channel acquisition circuit is connected to a unit under test.

4. The adaptive temperature compensation device based on a multi-channel voltage acquisition system according to claim 3, characterized in that: The multi-channel acquisition circuit is used to transmit the preliminarily processed voltage signal to the ADC.

5. The adaptive temperature compensation device based on a multi-channel voltage acquisition system according to claim 4, characterized in that: The ADC has a resolution of at least 16 bits and is used to convert an analog signal into a digital signal.

6. The adaptive temperature compensation device based on a multi-channel voltage acquisition system according to claim 1, characterized in that: The reference source module includes a group of reference voltage sources, and the number of the reference voltage sources is at least 2.

7. The adaptive temperature compensation device based on a multi-channel voltage acquisition system according to claim 1, characterized in that: The temperature acquisition circuit is an NTC temperature acquisition circuit.

8. The adaptive temperature compensation device based on a multi-channel voltage acquisition system according to claim 1, characterized in that: The temperature acquisition circuit is a PT100 temperature acquisition circuit.

9. The adaptive temperature compensation device based on a multi-channel voltage acquisition system according to claim 3, characterized in that: The calibration circuit includes a plurality of relay switch circuits, and the plurality of relay switch circuits are respectively connected to the multi-channel acquisition circuit.

10. The adaptive temperature compensation device based on a multi-channel voltage acquisition system according to claim 9, characterized in that: The relay switch circuit is installed between the ADC acquisition module and the unit under test.

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