CN210689508U

CN210689508U - Comprehensive data board card for RVDT and rotary transformer acquisition

Info

Publication number: CN210689508U
Application number: CN201922324518.1U
Authority: CN
Inventors: 汪明华; 高思国; 马兆军; 左学杰; 周琦; 刁鹏; 宋海彤; 武润泽
Original assignee: Shandong Gaite Aviation Technology Co ltd
Current assignee: Shandong Gaite Aviation Technology Co ltd
Priority date: 2019-12-19
Filing date: 2019-12-19
Publication date: 2020-06-05
Anticipated expiration: 2029-12-19

Abstract

The utility model provides a comprehensive data integrated circuit board that is used for RVDT and rotary transformer to gather, including the controller, RVDT detection circuitry and rotary transformer detection circuitry that are connected with the controller electricity, rotary transformer detection circuitry includes rotary transformer excitation production circuit and the RD demodulator that is connected with the controller respectively; the excitation generating circuit of the rotary transformer comprises a direct digital frequency synthesizer (DDS) and an amplifying circuit which are connected with each other, wherein the direct digital frequency synthesizer is connected with a controller, and configuration parameters of the direct digital frequency synthesizer are set through the controller to output excitation signals of various frequencies and voltages. The RVDT sensor of integrated multiple specification and resolver's test is gathered, has configured analog signal output and input circuit simultaneously, can realize the test of the device that needs trigger signal detection ware performance, to the detection like components and parts of this kind of main equipment of aircraft, adopts the utility model discloses a synthesize the integrated circuit board and can effectively promote efficiency of software testing.

Description

Comprehensive data board card for RVDT and rotary transformer acquisition

Technical Field

The utility model relates to a relevant technical field of rotary transformer, specific theory relates to a synthesize data integrated circuit board that is used for RVDT and rotary transformer to gather.

Background

The statements in this section merely provide background information related to the present disclosure and may not necessarily constitute prior art.

Rvdt (rotary Variable Differential transformer) is an abbreviation for rotary Variable Differential transformer, belonging to angular displacement sensors. It adopts the same differential transformer type principle as LVDT, i.e. the rotation of mechanical component is transferred to the shaft of angular displacement sensor to drive the connected spoiler/iron core, change the induced voltage/inductance in the coil and output the voltage/current signal proportional to the rotation angle. The RVDT is designed in a non-contact mode, has the characteristics of infinite resolution, long service life and high precision, can realize 360-degree rotation measurement, and is widely applied to transmission and feedback control of ball valve positions, hydraulic pumps, forklifts, robots, fans and other equipment.

A resolver (resolver) is an electromagnetic sensor, also known as a resolver. The small AC motor is used to measure angular displacement and speed of rotating shaft of rotating object and consists of stator and rotor. The stator winding is used as the primary side of the transformer and receives the excitation voltage, and the rotor winding is used as the secondary side of the transformer and obtains the induction voltage through electromagnetic coupling. The operation principle of the rotary transformer is basically similar to that of a common transformer, and the difference is that the primary winding and the secondary winding of the common transformer are relatively fixed, so that the ratio of the output voltage to the input voltage is constant, the primary winding and the secondary winding of the rotary transformer change in relative positions along with the angular displacement of a rotor, so that the output voltage changes along with the angular displacement of the rotor, and the voltage amplitude of the output winding and the rotor rotation angle form a sine function relationship and a cosine function relationship, or a certain proportional relationship is kept, or a linear relationship is formed between the voltage amplitude and the rotation angle within a certain rotation angle range. Rotary transformers can be used to transfer rotational angles or electrical signals in synchronous servo systems and digital servo systems.

The RVDT and the rotary transformer are detection parts commonly used for aerospace equipment (such as airplanes), belong to precise detection parts, are tested before being used, and accurately acquire the relationship between the angle of a sensor and output voltage. Different board cards need to be replaced according to different testing requirements in the testing process, and the testing efficiency is greatly reduced.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve above-mentioned problem, provide a synthesize data integrated circuit board that is used for RVDT and rotary transformer to gather, integrated multiple test function to such main equipment as aircraft, the sensor of involving is numerous, and wherein sensor is mostly accurate device, needs regularly to mark the school, adopts the utility model discloses a synthesize the integrated circuit board and can effectively promote efficiency of software testing.

In order to achieve the above purpose, the utility model adopts the following technical scheme:

one or more embodiments provide a comprehensive data board card for RVDT and resolver acquisition, which includes a controller, an RVDT detection circuit and a resolver detection circuit electrically connected to the controller, where the resolver detection circuit includes a resolver excitation generation circuit and an RD demodulator respectively connected to the controller; the excitation generating circuit of the rotary transformer comprises a direct digital frequency synthesizer and an amplifying circuit which are connected with each other, wherein the direct digital frequency synthesizer is connected with a controller, and the controller is used for setting configuration parameters of the direct digital frequency synthesizer to output excitation signals with various frequencies and voltages.

Further, the RD demodulator is connected with the rotary transformer and used for converting speed and angle signals of the rotary transformer into digital signals and sending the digital signals to the controller through the parallel bus.

Further, the RVDT detection circuit comprises an RVDT demodulator and a first analog-to-digital conversion circuit, and the RVDT demodulator is connected with the controller through the first analog-to-digital conversion circuit.

Further, the RVDT demodulator is used for being connected with the RVDT angle sensor and used for generating an excitation signal with specific frequency and voltage and converting the real-time angle signal of the RVDT angle sensor into direct current voltage.

Further, the first A/D conversion circuit is connected with the controller via a parallel bus

Further, the RVDT demodulator is configured to generate an excitation signal of a set frequency and voltage based on peripheral parameters of the demodulator configured by the controller.

Further, the peripheral parameters include an excitation voltage and an excitation frequency.

Furthermore, the device also comprises an AD acquisition circuit, wherein the AD acquisition circuit comprises a conditioning circuit and a second analog-to-digital conversion circuit which are connected with each other, and the second analog-to-digital conversion circuit is connected with the controller.

And the DAC chip is connected with the controller through an SPI bus and is used for outputting analog signals with set amplitude and frequency according to parameter configuration of the controller.

Further, the device also comprises an RS422 interface circuit connected with the controller, wherein the RS422 interface circuit is used for connecting external equipment; the external equipment is a computer terminal or a mobile terminal.

Compared with the prior art, the beneficial effects of the utility model are that:

the utility model discloses a set up direct digital frequency synthesizer and RVDT demodulator to set up its configuration parameter, can realize different excitation signal output, the RVDT sensor of integrated multiple specification and resolver's test acquisition adopt direct digital frequency synthesizer to improve the output frequency range of signal greatly, make this data integrated circuit board be applicable to the resolver of multiple model. Meanwhile, the analog signal output and input circuit is configured, so that the test of a device needing to trigger the performance of the signal detector can be realized, a plurality of detection functions are integrated on one board card, the carrying is convenient, and the test efficiency is effectively improved.

Drawings

The accompanying drawings, which form a part of the specification, are provided to provide a further understanding of the invention, and are included to explain the illustrative embodiments and the description of the invention, and not to constitute a limitation of the invention.

Fig. 1 is a schematic diagram of a circuit board circuit structure according to embodiment 1 of the present invention.

The specific implementation mode is as follows:

the present invention will be further explained with reference to the accompanying drawings and examples.

It should be noted that the following detailed description is exemplary and is intended to provide further explanation of the invention. Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs.

It is noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to be limiting of example embodiments in accordance with the invention. As used herein, the singular forms "a", "an" and "the" are intended to include the plural forms as well, and it should be understood that when the terms "comprises" and/or "comprising" are used in this specification, they specify the presence of stated features, steps, operations, devices, components, and/or combinations thereof, unless the context clearly indicates otherwise. It should be noted that, in the present invention, the features of the embodiments and the examples may be combined with each other without conflict. The embodiments will be described in detail below with reference to the accompanying drawings.

In one or more embodiments, as shown in fig. 1, an integrated data board card for RVDT and resolver acquisition includes a controller, an RVDT detection circuit and a resolver detection circuit electrically connected to the controller, where the resolver detection circuit includes a resolver excitation generation circuit and an RD demodulator respectively connected to the controller; the excitation generating circuit of the rotary transformer comprises a direct digital frequency synthesizer (DDS) and an amplifying circuit which are connected with each other, wherein the direct digital frequency synthesizer is connected with a controller, and configuration parameters of the direct digital frequency synthesizer are set through the controller to output excitation signals of various frequencies and voltages.

As an implementation structure, the specific model of the direct digital frequency synthesizer (DDS) may be AD5930, AD9102, AD9850, or AD 9951. The amplifying circuit can be a specific circuit and can be set as a differential amplifier; direct digital frequency synthesizer (DDS) configuration parameters include at least frequency.

The direct digital frequency synthesizer generates analog quantity waveform signals with certain frequency according to digital signals; the frequency and the voltage of the excitation signal are changed by the controller through changing the configuration parameters of the direct digital frequency synthesizer, parameter configuration can be carried out according to the model of a specific rotary transformer, different waveforms are output, the output frequency range of the signal is greatly improved by adopting the direct digital frequency synthesizer, and the data board card is suitable for rotary transformers of various models.

The RD demodulator is connected with the rotary transformer and used for converting speed and angle signals of the rotary transformer into digital signals, and the digital signals are sent to the controller through the parallel bus to finish the acquisition of signals of the rotary transformer. The model of the RD demodulator may be AD2S80A, AD2S82A, AD2S83, or AD2S 1210.

In some embodiments, the RVDT detection circuit includes an RVDT demodulator connected to the controller through a first analog-to-digital conversion circuit ADC1 and a first analog-to-digital conversion circuit ADC1, the RVDT demodulator being connected to the RVDT angle sensor, the RVDT demodulator being configured to generate an excitation signal of a particular frequency and voltage and to convert the real-time angle signal of the RVDT angle sensor to a dc voltage.

Optionally, the RVDT demodulator is configured to generate an excitation signal of a particular frequency and voltage based on peripheral parameters of the demodulator configured by the controller. That is, the frequency and voltage of the excitation signal are realized by changing the peripheral parameters of the demodulator, and the peripheral parameters of the demodulator can be flexibly configured through the controller.

Optionally, the model of the RVDT demodulator may be AD598 or AD698, and the peripheral parameters of the RVDT demodulator include an excitation voltage and an excitation frequency.

The first analog/digital conversion circuit ADC1 is used to convert the dc voltage signal converted by the RVDT demodulator according to the real-time angle signal of the RVDT sensor into a digital signal, and transmit the digital signal to the controller. A parallel bus may be provided to connect the first analog/digital conversion circuit and the controller in a parallel transmission manner.

As a further improvement, in order to realize signal acquisition of multiple signal detection units, an AD acquisition circuit may be further disposed on the integrated data board, the AD acquisition circuit includes a conditioning circuit and a second analog/digital conversion circuit, which are connected to each other, and the second analog/digital conversion circuit is connected to the controller.

The conditioning circuit is used for conditioning, amplifying, buffering or calibrating the analog signal and processing the input analog signal into a signal meeting the requirements of the ADC chip; the second analog/digital conversion circuit, such as the ADC2 or the ADC3 in fig. 1, receives and digitizes the signal transmitted by the conditioning circuit, collects an input signal, and sends the signal to the controller through the parallel bus. The second analog/digital conversion circuit ADC2 or ADC3 may be an ADC chip of model AD7606, AD7616 or AD 7705.

As a further improvement, a corresponding trigger signal can be output to the detected component, for example, the detection of the switching tube can send out a pulse signal for detecting whether the switching tube works normally or not. Can set up analog signal output circuit, including interconnect's DAC chip and peripheral circuit, the DAC chip passes through the SPI bus and is connected with the controller for according to the analog signal of the parameter configuration output setting amplitude and frequency of controller. The model of the DAC chip can be AD5674, AD5679, AD5766 or LTC 2668.

The analog signal output circuit and the AD acquisition circuit can be used independently respectively. The combination of the analog signal output circuit and the AD acquisition circuit can realize the test of a device to be tested after triggering, for example, a switch tube in the circuit can output a voltage signal with an amplitude larger than a trigger voltage at the analog signal output circuit, and the switch-on end of the switch tube is connected with the AD acquisition circuit, so that the switch-on condition of the switch tube is tested.

As a further improvement, the system can further comprise an RS422 interface circuit connected with the controller, the RS422 interface circuit is used for connecting external equipment, the RS422 interface circuit comprises an RS422 interface chip and a peripheral circuit, the controller sends acquired data to the external equipment through the RS422 interface circuit, and configuration information of the external equipment is sent to the controller through the RS422 interface circuit.

The external device can be an upper computer, a computer terminal or a mobile terminal, such as a notebook computer or a tablet.

The controller is a core device of the board card in this embodiment, and the model of the controller may be STM32F407ZGT6, which is responsible for board card self-checking, data processing, and communication with external devices.

As a specific example, the present embodiment is provided with 4 paths of RVDT excitation signal output and demodulation functions, 4 paths of resolver excitation output and demodulation functions, 32 paths of analog signal acquisition and 16 paths of analog signal output functions, and communicates with external devices through an RS422 bus, and the specific number of paths set is only an example and can be set according to specific needs.

The frequency range of the RVDT excitation signal is 20 Hz-20 kHz, the voltage range is 0V-22V, the frequency and the voltage of the output excitation signal are adjusted according to the model of the RVDT sensor to be detected, and 4 paths of RVDT output angle signals with different models can be acquired in real time at a time interval of 50 us.

The frequency range of an excitation signal for driving the rotary transformer in the board card is 400 Hz-10 kHz, the voltage range is 3.5V-30V, the frequency and the voltage of the output excitation signal are adjusted according to the type of the rotary transformer to be detected, and the real-time acquisition of output rotating speed and angle signals of 4 rotary transformers with different types at 50us time intervals can be realized.

The acquisition function of 32 paths of analog signals, the sampling range is +/-10V, the resolution is 12 bits, and the conversion time is 10 us;

the 16-path analog signal output function has the output range of +/-10V, the resolution of 12 bits and the conversion time of 10 us.

The use method of the integrated data board card of the embodiment is as follows:

after the power is on, the controller initializes, data acquisition is carried out after configuration is read from the internal Flash memory Flash, and the acquired data is sent to external equipment through an RS422 serial bus interface. When the configuration is updated, the external equipment sends the configuration to the controller through the RS422 serial bus, and the controller stores the configuration in the internal Flash. And after the board card is powered on again, acquiring data according to the new configuration and uploading the data.

The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention, and various modifications and changes may be made by those skilled in the art. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Although the present invention has been described with reference to the accompanying drawings, it is not intended to limit the scope of the present invention, and those skilled in the art should understand that various modifications or variations that can be made by those skilled in the art without inventive work are still within the scope of the present invention.

Claims

1. A comprehensive data board card for RVDT and resolver collection is characterized in that: the system comprises a controller, an RVDT detection circuit and a rotary transformer detection circuit, wherein the RVDT detection circuit and the rotary transformer detection circuit are electrically connected with the controller; the excitation generating circuit of the rotary transformer comprises a direct digital frequency synthesizer and an amplifying circuit which are connected with each other, wherein the direct digital frequency synthesizer is connected with a controller, and the controller is used for setting configuration parameters of the direct digital frequency synthesizer to output excitation signals with various frequencies and voltages.

2. The integrated data board card for RVDT and resolver acquisition of claim 1, wherein: the RD demodulator is connected with the rotary transformer and used for converting speed and angle signals of the rotary transformer into digital signals and sending the digital signals to the controller through the parallel bus.

3. The integrated data board card for RVDT and resolver acquisition of claim 1, wherein: the RVDT detection circuit comprises an RVDT demodulator and a first analog-to-digital conversion circuit, and the RVDT demodulator is connected with the controller through the first analog-to-digital conversion circuit.

4. The integrated data board card for RVDT and resolver acquisition of claim 3, wherein: the RVDT demodulator is used for being connected with the RVDT angle sensor and used for generating an excitation signal with specific frequency and voltage and converting a real-time angle signal of the RVDT angle sensor into direct-current voltage.

5. The integrated data board card for RVDT and resolver acquisition of claim 3, wherein: the first analog/digital conversion circuit is connected with the controller through a parallel bus.

6. The integrated data board card for RVDT and resolver acquisition of claim 3, wherein: the RVDT demodulator is used for generating an excitation signal with set frequency and voltage according to peripheral parameters of the demodulator configured by the controller.

7. The integrated data board card for RVDT and resolver acquisition of claim 6, wherein: the peripheral parameters include an excitation voltage and an excitation frequency.

8. The integrated data board card for RVDT and resolver acquisition of claim 1, wherein: the AD acquisition circuit comprises a conditioning circuit and a second analog/digital conversion circuit which are connected with each other, and the second analog/digital conversion circuit is connected with the controller.

9. The integrated data board card for RVDT and resolver acquisition of claim 1, wherein: the digital-to-analog converter further comprises an analog signal output circuit which comprises a DAC chip and a peripheral circuit which are connected with each other, wherein the DAC chip is connected with the controller through an SPI bus and used for outputting analog signals with set amplitude and frequency according to parameter configuration of the controller.

10. The integrated data board card for RVDT and resolver acquisition of claim 1, wherein: the controller also comprises an RS422 interface circuit connected with the controller, wherein the RS422 interface circuit is used for connecting external equipment; the external equipment is a computer terminal or a mobile terminal.