Self-adaptive control and acquisition device based on RVDT excitation source

Abstract

The utility model belongs to the technical field of avionics and communication, and particularly relates to a self-adaptive control and acquisition device based on an RVDT excitation source. The device comprises a working power supply, a standard power supply, a filter circuit, an amplifying circuit, a driving circuit and a calibration module, the working power supply is used for supplying power to the standard power supply, the amplifying circuit and the driving circuit; the standard power supply, the filter circuit, the amplifying circuit and the driving circuit are electrically connected in sequence, and the output end of the driving circuit serves as the output end of the RVDT excitation source; the output end of the drive circuit is further connected with the input end of the calibration module, and the output end of the calibration module is connected with the feedback end of the filter circuit. The technical problems that a traditional RVDT conversion path signal collecting and processing method is high in cost and low in response speed, and self-adaptive collection cannot be achieved are solved.

Description

Technical Field

[0001] This utility model belongs to the field of avionics and communication technology, and particularly relates to an adaptive control and acquisition device based on RVDT excitation source. Background Technology

[0002] With the rapid development of the aviation industry, signal acquisition and processing technology plays a crucial role in related fields. Direct current (DC) is the common power supply mode on aircraft; however, some devices require high-frequency alternating current (AC) for signal transmission, making DC-to-AC conversion an important technical aspect. The RVDT (Radio Frequency Directional Measurement) element, with its advantages of simple structure, large linear range, and high accuracy, has been widely used in aviation signal acquisition technology. However, traditional RVDT interface circuits suffer from high cost, slow response speed, and inability to adaptively control the output excitation source in the process of converting DC to AC signals. Utility Model Content

[0003] To address the problems in the background technology, this utility model provides an adaptive control and acquisition device based on an RVDT excitation source, used to convert a constant voltage element into an RVDT excitation output. This improves upon the technical problems of high cost, slow response speed, and inability to adaptively acquire signals using traditional RVDT conversion circuit signal acquisition and processing methods.

[0004] To achieve the above objectives, the present invention adopts the following technical solution.

[0005] An adaptive control and acquisition device based on an RVDT excitation source, the device comprising: a working power supply, a standard power supply, a filter circuit, an amplifier circuit, a drive circuit, and a calibration module;

[0006] The operating power supply is used to power the standard power supply, amplifier circuit, and driver circuit;

[0007] The standard power supply, filter circuit, amplifier circuit and drive circuit are electrically connected in sequence, and the output terminal of the drive circuit serves as the output terminal of the RVDT excitation source.

[0008] The output of the driving circuit is also connected to the input of the calibration module, and the output of the calibration module is connected to the feedback of the filter circuit.

[0009] Furthermore,

[0010] The calibration module consists of a signal conditioning module, an A / D conversion module, and an adaptive calibration module that are electrically connected in sequence.

[0011] Furthermore,

[0012] The working power supply, standard power supply, filter circuit, and calibration module constitute the signal generation circuit.

[0013] The amplifier circuit and the driver circuit together form an amplifier-driver circuit.

[0014] Furthermore,

[0015] The operating power supply is used to power the standard power supply, amplifier circuit, and drive circuit. The signal generated by the standard power supply enters the filter circuit after passing through the calibration module. The signal then passes through the filter circuit and the drive circuit. The output signal of the drive circuit, while being output externally, enters the signal conditioning module through the sampling channel, and is then converted into a digital signal by the A / D conversion module. The signal then enters the adaptive adjustment module, which outputs the RVDT configuration coefficient. The RVDT configuration coefficient is input to the filter circuit.

[0016] Furthermore,

[0017] The signal generation circuit includes: the positive terminal of the power supply's operating voltage, after passing through a matching impedance, enables the standard power supply to output a 10V standard voltage; a calibration module and a voltage divider resistor R. j The standard voltage is divided, and the positive terminals of the first capacitor C1 and the second capacitor C2 of the filter circuit are connected to the positive terminal of the calibration module. The positive terminal of the voltage follower is connected to the positive output terminal of the filter circuit, and the output of the voltage follower is the output of the signal generation circuit.

[0018] Furthermore,

[0019] The amplification and driving circuit consists of the following: the output of the signal generation circuit serves as the input of the amplification and driving circuit, connected to the positive terminal of operational amplifier A2 and grounded through the first resistor R3. The negative terminal of operational amplifier A2 is divided into two ends, one of which is grounded through the second resistor R2, and the other end is connected to the output terminal of operational amplifier A2 through the third resistor R1. The output terminal of operational amplifier A2 is connected to a push-pull circuit, where the output terminal of operational amplifier A2 is connected to 15V and -15V voltages through the fourth resistor R5 and the fifth resistor R7, respectively. It is also connected to the bases of NPN and PNP transistors. The collector of the NPN transistor is connected to 15V voltage through the sixth resistor R4, and the collector of the PNP transistor is connected to -15V voltage through the seventh resistor R6. The emitters of the two transistors are connected and serve as the output of the amplification and driving circuit.

[0020] This invention provides an adaptive control and acquisition device based on an RVDT excitation source, used to convert a 15V constant voltage source into a 7V 1800Hz RVDT excitation output. It improves upon the technical problems of traditional RVDT conversion circuit signal acquisition and processing methods, which suffer from high cost, slow response speed, and inability to adaptively acquire signals. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the hardware structure of an adaptive control and acquisition device based on an RVDT excitation source;

[0022] Figure 2 This is a schematic diagram of the circuit structure of an adaptive control and acquisition device based on an RVDT excitation source. Detailed Implementation

[0023] The present invention will now be described in detail with reference to the accompanying drawings.

[0024] This utility model provides an adaptive control and acquisition device based on an RVDT excitation source, see reference. Figure 1 (Flowchart description):

[0025] The operating power supply powers the standard power supply, amplification circuit, and drive circuit. The standard power supply generates a signal, which, after being adjusted by the calibration module, enters the filtering circuit. Only the set frequency passes through the filter. The signal then passes through the drive circuit, where it is amplified to meet the amplitude requirements. The generated output signal, while being output externally, enters the signal conditioning module via a sampling channel. It is then converted to a digital signal by an A / D converter and enters the adaptive adjustment module for data processing and analysis. Based on the analysis results, the RVDT() configuration coefficient is adjusted. This coefficient influences the signal before it enters the filtering module, correcting the output result and ensuring that the output signal always operates normally under different external interference conditions.

[0026] See Figure 2 (Schematic description)

[0027] The operating voltage supplies power to the circuit, and the operating voltage ground is a common ground.

[0028] Signal generation circuit: The positive terminal of the operating voltage, after passing through a matching impedance, enables the standard voltage source to output a 10V standard voltage. Calibration module and R... j The standard voltage is divided, and the positive terminals of capacitors C1 and C2 in the filter circuit are connected to the positive terminal of the calibration module. The positive terminal of the voltage follower is connected to the positive output terminal of the filter circuit, and the output is the output of the signal generation circuit.

[0029] Amplification and Driving Circuit: The output of the signal generation circuit serves as the input of the amplification and driving circuit, connected to the positive terminal of operational amplifier A2 and grounded via resistor R3. The negative terminal of operational amplifier A2 is divided into two ends: one end is grounded through resistor R2, and the other end is connected to the output terminal of A2 through resistor R1. The output terminal of operational amplifier A2 is connected to a push-pull circuit, where the output terminal of operational amplifier A2 is connected to 15V and -15V voltages respectively through resistors R5 and R7, and is also connected to the bases of NPN and PNP transistors. The collector of the NPN transistor is connected to 15V through resistor R4, and the collector of the PNP transistor is connected to -15V through resistor R6. The emitters of the two transistors are connected and used as the output terminal to transmit the signal.

[0030] This utility model embodiment provides a hardware circuit for an adaptive control and acquisition device based on an RVDT excitation source, which is implemented in two modules. The first circuit uses a voltage follower as the interface input, with high input impedance and low output impedance. The back-end circuit does not need to design additional circuits for impedance matching, thereby reducing the number of components used and lowering the hardware circuit design cost. Fewer components also reduce the impact of different component qualities on the product's lifespan, thereby reducing the later maintenance cost.

[0031] The second circuit uses a push-pull circuit for output after signal amplification instead of an open-drain circuit. Push-pull output has better level driving capability, does not rely on external pull-up resistors, and has a faster frequency conversion speed, higher sensitivity, and a faster overall circuit response speed.

[0032] After the conventional RVDT control unit circuit is designed, the output signal cannot be changed under the same external conditions. When the temperature changes, the circuit device parameters change slightly, which leads to a decrease in the output signal performance or even failure to work within the required range. This invention uses hardware, FPGA, and software to coordinate negative feedback, which can adjust the output control signal in real time according to different output feedback. Even if the performance of the circuit device changes, the control signal can be adjusted immediately to keep the output signal in the optimal state.

Claims

1. An adaptive control and acquisition device based on an RVDT excitation source, characterized in that, The device includes: a working power supply, a standard power supply, a filter circuit, an amplifier circuit, a driver circuit, and a calibration module; The operating power supply is used to power the standard power supply, amplifier circuit, and driver circuit; The standard power supply, filter circuit, amplifier circuit and drive circuit are electrically connected in sequence, and the output terminal of the drive circuit serves as the output terminal of the RVDT excitation source. The output of the driving circuit is also connected to the input of the calibration module, and the output of the calibration module is connected to the feedback of the filter circuit.

2. The adaptive control and acquisition device based on RVDT excitation source according to claim 1, characterized in that, The calibration module consists of a signal conditioning module, an A / D conversion module, and an adaptive calibration module that are electrically connected in sequence.

3. The adaptive control and acquisition device based on RVDT excitation source according to claim 2, characterized in that, The working power supply, standard power supply, filter circuit, and calibration module constitute the signal generation circuit. The amplifier circuit and the driver circuit together form an amplifier-driver circuit.

4. The adaptive control and acquisition device based on RVDT excitation source according to claim 3, characterized in that, The operating power supply is used to power the standard power supply, amplifier circuit, and drive circuit. The signal generated by the standard power supply enters the filter circuit after passing through the calibration module. The signal then passes through the filter circuit and the drive circuit. The output signal of the drive circuit, while being output externally, enters the signal conditioning module through the sampling channel, and is then converted into a digital signal by the A / D conversion module. The signal then enters the adaptive adjustment module, which outputs the RVDT configuration coefficient. The RVDT configuration coefficient is input to the filter circuit.

5. The adaptive control and acquisition device based on RVDT excitation source according to claim 4, characterized in that, The signal generation circuit includes: the positive terminal of the power supply's operating voltage, after passing through a matching impedance, enables the standard power supply to output a 10V standard voltage; a calibration module and a voltage divider resistor R. j The standard voltage is divided, and the positive terminals of the first capacitor C1 and the second capacitor C2 of the filter circuit are connected to the positive terminal of the calibration module. The positive terminal of the voltage follower is connected to the positive output terminal of the filter circuit, and the output of the voltage follower is the output of the signal generation circuit.

6. The adaptive control and acquisition device based on RVDT excitation source according to claim 5, characterized in that, The amplification and driving circuit consists of the following: the output of the signal generation circuit serves as the input of the amplification and driving circuit, connected to the positive terminal of operational amplifier A2 and grounded through the first resistor R3. The negative terminal of operational amplifier A2 is divided into two ends, one of which is grounded through the second resistor R2, and the other end is connected to the output terminal of operational amplifier A2 through the third resistor R1. The output terminal of operational amplifier A2 is connected to a push-pull circuit, where the output terminal of operational amplifier A2 is connected to 15V and -15V voltages through the fourth resistor R5 and the fifth resistor R7, respectively. It is also connected to the bases of NPN and PNP transistors. The collector of the NPN transistor is connected to 15V voltage through the sixth resistor R4, and the collector of the PNP transistor is connected to -15V voltage through the seventh resistor R6. The emitters of the two transistors are connected and serve as the output of the amplification and driving circuit.

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