Small signal conversion and measurement device

Abstract

The utility model relates to a small signal conversion and measurement device, which aims to solve the problems of the existing equipment in the aspects of volume, integration level, measurement accuracy and the like. The device comprises a signal conversion module and a signal processing module, and the input end of the signal processing module is electrically connected with the output end of the signal conversion module. And the signal conversion module is used for converting an input small signal into a required high voltage or large current to be output so as to meet the requirements of precise measurement and calibration. And the signal processing module is used for receiving and processing the converted signal, and the signal is monitored and controlled in real time through the integrated measuring unit and control unit, so that the stability and accuracy of the output signal are ensured. The device has the characteristics of high integration level, simple structure, high measurement precision and strong adjustability, and is suitable for a plurality of fields of power systems, electronic product tests, scientific research experiments and the like.

Description

Technical Field

[0001] The utility model relates to the technical field of electric power measurement, in particular to a small signal conversion and measurement device. Background Art

[0002] In the fields of power systems, electronic product testing, and scientific research experiments, converting and measuring small signals is a common and important task. Existing small signal conversion and measurement equipment has some problems during use:

[0003] Test equipment is usually large and heavy, which makes it difficult to carry and operate on site. This bulky feature limits the use of the equipment, especially in environments that require frequent movement or limited space, causing many inconveniences to operators.

[0004] The power supply methods of existing equipment often cannot meet the actual use needs. Some equipment relies on external power supply, which is difficult to use in field environments without stable power supply; while some portable equipment may not be able to work for a long time due to battery capacity limitations.

[0005] In addition, existing equipment also has room for improvement in terms of accuracy, functional integration, and ease of operation. Many devices require multiple independent instruments to complete comprehensive measurement tasks, which increases operational complexity and cost. Utility Model Content

[0006] The utility model proposes a small signal conversion and measurement device, aiming to solve the defects of large device volume, insufficient precision and functional integration, etc.

[0007] The utility model proposes the following technical solutions:

[0008] A small signal conversion and measurement device comprises a signal conversion module and a signal processing module, wherein the signal conversion module is arranged on a base plate, the signal processing module is arranged on a core board, and the input end of the signal processing module is electrically connected to the output end of the signal conversion module, thereby realizing effective integration of signal conversion and processing.

[0009] Furthermore, the signal conversion module includes a voltage output circuit and a current output circuit connected in parallel, which can provide voltage and current output simultaneously. Preferably, the voltage output circuit includes a voltage follower, a first transformer and a voltage transformer connected in series in sequence, realizing the conversion of small signals to high voltages. Correspondingly, the current output circuit includes an operational amplifier, a power amplifier, a second transformer and a current transformer connected in series in sequence, realizing the conversion of small signals to large currents.

[0010] More specifically, the signal processing module includes a measuring unit and a control unit, and the output end of the measuring unit is connected to the input end of the control unit. This structure allows the measurement and control functions to be closely combined, thereby improving the overall performance of the system. Further optimized, the measuring unit includes a metering chip, and the input end of the metering chip is electrically connected to the output end of the signal conversion module, thereby achieving accurate measurement of the converted signal. Accordingly, the control unit includes a microcontroller (MCU), and the data port of the MCU is connected to the data output end of the measuring unit, so that the control unit can make real-time adjustments and controls according to the measurement results.

[0011] The utility model also includes a communication interface, the data end of the communication interface is electrically connected to the communication port of the signal processing module, so that the device can exchange data with external equipment, thereby enhancing the expansibility and interoperability of the system.

[0012] In addition, the utility model is further provided with a serial port maintenance module, the data end of the serial port maintenance module is electrically connected to the debugging port of the signal processing module, which is convenient for debugging and maintenance of the equipment and improves the maintainability of the system.

[0013] The beneficial effects of the utility model are:

[0014] The device includes a signal conversion module and a signal processing module, wherein the signal conversion module is arranged on a base plate, the signal processing module is arranged on a core board, and the input end of the signal processing module is electrically connected to the output end of the signal conversion module. Through this modular design, a high degree of integration of the functional modules inside the device is achieved, the complexity of the system and the volume of the device are reduced, and the compactness and reliability of the device are improved. The signal conversion module can convert a small signal into a high voltage or high current output through an improved voltage and current output circuit, meeting the needs of various precision measurements and calibrations.

[0015] The signal processing module integrates the measurement unit and the control unit, and can monitor and control the output signal in real time to ensure the stability and accuracy of the signal. Through the communication interface, the device can be integrated with other devices or systems to adapt to a variety of application scenarios. In addition, the setting of the serial port maintenance module simplifies the debugging and maintenance process of the equipment, reduces maintenance costs, and improves work efficiency. In general, the device integrates signal conversion, measurement and control functions in one system, reduces the complexity of the system, and improves overall performance and reliability. Due to its high integration and multifunctional characteristics, the device is suitable for power systems, electronic product testing, scientific research experiments and other fields, and has broad application prospects. Through the above design and functional implementation, the utility model provides a solution in the field of small signal conversion and measurement, and contributes to the development of related technical fields. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a principle block diagram of a small signal conversion and measurement device in one embodiment of the utility model;

[0017] Figure 2 It is a structural schematic diagram of a small signal conversion and measurement device in one embodiment of the utility model. DETAILED DESCRIPTION

[0018] The technical solution of the utility model is described in detail below in conjunction with the accompanying drawings and specific embodiments. It should be noted that the described embodiments are only used to explain the technical principles of the utility model, rather than to limit its protection scope. Those skilled in the art should understand that, without departing from the spirit and scope of the utility model, these embodiments can be subjected to various transformations, modifications or equivalent substitutions. These transformations, modifications or equivalent substitutions should all be deemed to fall within the protection scope defined by the claims of the utility model.

[0019] like Figure 1 As shown, the small signal conversion and measurement device involved in this embodiment includes a signal conversion module and a signal processing module.

[0020] The signal conversion module is divided into a current output circuit and a voltage output circuit. The current output circuit is connected in series with an operational amplifier, a power amplifier, a transformer and a current transformer. The voltage output circuit is connected in series with a voltage follower, a transformer and a voltage transformer. The two circuits output current signals and voltage signals respectively, which are input into the signal processing module.

[0021] The signal processing module includes a measuring unit and a control unit. The measuring unit contains a metering chip, which is responsible for accurately measuring the input voltage and current signals and transmitting the measurement data to the control unit. The control unit contains a microcontroller, which is used to process the measurement data and realize data communication and device debugging with external devices through the communication interface and serial port maintenance module.

[0022] That is, the output end of the signal processing module is connected to the communication interface and serial port maintenance module to realize other functions of the device. This modular design improves the accuracy, functional integration and operational convenience of the device, and is suitable for various application scenarios that require precise signal conversion and measurement.

[0023] like Figure 2 As shown, the device includes a signal conversion module and a signal processing module, wherein the input end of the signal processing module is electrically connected to the output end of the signal conversion module.

[0024] In this embodiment, the signal conversion module includes a voltage output circuit and a current output circuit. The voltage output circuit is connected in series with a voltage follower, a transformer and a voltage transformer. In this embodiment, the voltage output is preferably 57.5V. Specifically, the voltage output can be adjusted according to actual use requirements to meet the voltage requirements of different devices or systems. The voltage follower uses an OP07C operational amplifier, the primary winding of the transformer is connected to the output end of the voltage follower, and the secondary winding is connected to the output end. The transformer has a transformation ratio of 5:100, which can amplify the 0-5V input signal to an output voltage of 0-100V.

[0025] The current output circuit is connected in series with an operational amplifier, a power amplifier, a transformer and a current transformer in sequence. In this embodiment, the current output range is preferably 1A, 5.1A, 6.1A and 9.1A. Specifically, for example, when a larger current output is required, the current can be adjusted to 6.1A or 9.1A, and when a smaller current output is required, the current can be adjusted to 1A or 5.1A to adapt to the current requirements of different loads or application scenarios. The operational amplifier uses an OPA445 high-voltage and high-current operational amplifier, the power amplifier uses an LM3886 power amplifier, and the transformer ratio is 20:1 to ensure the stability and accuracy of the current output.

[0026] The signal processing module includes a measuring unit and a control unit. The output end of the measuring unit is connected to the input end of the control unit, the measuring unit includes a metering chip HT7036, and the input end of the metering chip is electrically connected to the output end of the signal conversion module. The control unit includes a microcontroller STM32F103C8T6, and the data port of the microcontroller is connected to the data output end of the measuring unit.

[0027] The device also includes a communication interface and a serial port maintenance module. The communication interface includes an RS232 interface for communicating with the main chip, and the data end of the interface is electrically connected to the communication port of the signal processing module. The data end of the serial port maintenance module is electrically connected to the debugging port of the signal processing module for equipment maintenance and debugging.

[0028] The power connector uses 6PIN and 4PIN aviation plug connectors to realize power input and signal transmission. Through the 6PIN and 4PIN aviation plug connectors, voltage and current signals are input from the outside to the signal conversion module and the signal and signal processing module. In another embodiment, the device is also compatible with external lithium battery pack power supply. Especially in field environments where there is a lack of fixed power supply, it can be connected to a lithium battery pack with matching specifications through a 6PIN aviation plug connector to achieve portable power supply. This design not only improves the integration of the device, but also enhances its flexibility of use. By integrating multiple power supply methods, the device can adapt to a variety of work scenarios and expand its scope of application.

[0029] In actual work, the signal conversion module is responsible for converting the input analog signal into voltage or current output. The converted signal is amplified and adjusted through circuits such as voltage followers, operational amplifiers, and power amplifiers, and is output to the signal processing module through transformers and mutual inductors. The signal processing module receives the converted signal and performs precise measurement through the metering chip HT7036, and the measurement results are transmitted to the microcontroller STM32F103C8T6 for data processing and control.

[0030] The communication interface realizes data exchange with external devices through the RS232 interface, and can perform remote monitoring and control. The serial port maintenance module is used for debugging and maintenance of the device. The device also includes a reset button and a watchdog function to ensure that the device can automatically recover and protect during operation, thereby improving the stability and reliability of the system.

[0031] In this embodiment, the signal conversion module is arranged on the base plate, and the signal processing module is arranged on the core board. The base plate is fixedly connected to the inside of a housing by screws, and the core board is also fixed to the inside of the housing by screws. In addition, the base plate and the core board can also be connected to the preset fixing groove inside the housing by snaps. This design method improves the integration of the device, so that the signal conversion module and the signal processing module can be tightly integrated in one device, reducing the complexity of internal connections and improving the overall performance.

[0032] The small signal conversion and measurement device proposed in the utility model has the advantages of high integration, simple structure, high measurement accuracy and strong adjustability. The high integration of the device is reflected in that the signal conversion module and the signal processing module are respectively arranged on the base plate and the core board. Through this layout, efficient space utilization and functional integration are achieved, the complexity of the equipment is reduced, and the reliability is improved. By using high-precision metering chips and microcontrollers, the device can accurately convert and measure input voltage and current signals, ensuring the accuracy of the measurement results.

[0033] The output range of the voltage output circuit and the current output circuit can be adjusted according to actual needs to adapt to different application scenarios. For example, the voltage output can be adjusted to 57.5V, and the current output range can be adjusted to 1A, 5.1A, 6.1A and 9.1A, meeting diverse usage requirements. The device can be used not only in power systems, but also in multiple fields such as electronic product testing and scientific research experiments. It performs well in situations where precise signal conversion and measurement are required, such as in field operations and portable applications, and its compact and lightweight design makes it easier to carry and use. In summary, the small signal conversion and measurement device of this embodiment simplifies the structure, improves the measurement accuracy and enhances the adjustability through a highly integrated design, solves the problems in the prior art, and can be applied to various situations where precise signal conversion and measurement are required, meeting a variety of application requirements.

[0034] Obviously, those skilled in the art can make various changes and modifications to the present invention without departing from the spirit and scope of the present invention. Thus, if these modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include these modifications and variations.

Claims

1. A small signal conversion and measurement device, characterized in that: include: Signal conversion module and signal processing module; Wherein, the signal conversion module is arranged on the base board, the signal processing module is arranged on the core board, and the input end of the signal processing module is electrically connected to the output end of the signal conversion module; The signal processing module includes a measuring unit and a control unit, and the output end of the measuring unit is connected to the input end of the control unit; The measuring unit comprises a metering chip, the input end of the metering chip is electrically connected to the output end of the signal conversion module; The control unit comprises a microcontroller, and a data port of the microcontroller is connected to a data output terminal of the measuring unit.

2. The device according to claim 1, characterized in that The signal conversion module includes a voltage output circuit and a current output circuit connected in parallel.

3. The device according to claim 2, characterized in that The voltage output circuit comprises a voltage follower, a first transformer and a voltage transformer which are connected in series in sequence.

4. The device according to claim 2, characterized in that The current output circuit comprises an operational amplifier, a power amplifier, a second transformer and a current transformer which are sequentially connected in series.

5. The device according to claim 1, characterized in that It also includes a communication interface, a data end of the communication interface is electrically connected to the communication port of the signal processing module.

6. The device according to claim 1, characterized in that It also includes a serial port maintenance module, a data end of the serial port maintenance module is electrically connected to the debugging port of the signal processing module.

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