Fiber-optic gyroscope data acquisition device

Abstract

The utility model relates to a fiber-optic gyroscope data acquisition device, which comprises a case shell and a control circuit positioned in the case shell, the interface board is provided with a plurality of channels and can be simultaneously connected with a plurality of fiber-optic gyroscopes; the power supply board is connected with the interface board and is used for supplying power to the interface board; the main control board is connected with the interface board and the power supply board, controls data acquisition, integration and transmission of the fiber-optic gyroscope, controls power on and off of the power supply board, and receives data of a working circuit of the power supply board; and the display screen is connected with the main control board and is used for displaying the current value of each channel in real time and monitoring the power supply state of the fiber-optic gyroscope. Compared with the prior art, the multi-channel fiber-optic gyroscope data acquisition device can realize data acquisition of multi-channel fiber-optic gyroscopes of different models, improves the acquisition efficiency, and is high in integration level and convenient to maintain.

Description

Technical Field

[0001] The utility model relates to the technical field of data acquisition, in particular to a fiber optic gyroscope data acquisition device. Background Art

[0002] As a high-precision, high-stability inertial measurement device, fiber optic gyroscope has broad application prospects in aerospace, shipbuilding, navigation and other fields. However, for a long time, my country has relied on imported equipment in the field of fiber optic gyroscope test systems, which is not only costly, but also has hidden dangers in terms of technical confidentiality and supply chain security. Because the working environment of the fiber optic gyroscope is very harsh, and each fiber optic gyroscope product must be tested in a harsh test environment, in the actual working environment of the simulated fiber optic gyroscope, the fiber optic gyroscope test environment types are many, the test items are many, and the test takes a long time, resulting in high fiber optic gyroscope test costs and other problems. With the expansion of production scale, fiber optic gyroscope testing has become a more prominent problem. With the current testing capabilities, it is impossible to meet the needs of timely and sufficient delivery.

[0003] Therefore, it is urgent and necessary to design and develop a multi-channel fiber optic gyroscope data acquisition device that can improve the test efficiency of gyroscope data testing to meet the needs of scientific research experiments and engineering production inspection of gyroscopes.

[0004] Patent publication number CN108507591A discloses a multi-channel MEMS gyroscope calibration test data acquisition device and acquisition method, wherein the processor communication interface of the CAN transceiver is connected to the CAN controller interface of the DSP processor; the first channel selection signal communication end of the DSP processor is respectively connected to the selection signal interface of each MEMS gyroscope angular velocity sensor of the first MEMS gyroscope angular velocity sensor group through a level converter, and the second channel selection signal communication end of the DSP processor is respectively connected to the selection signal interface of each MEMS gyroscope angular velocity sensor of the second MEMS gyroscope angular velocity sensor group through a level converter; each SPI communication interface of the DSP processor is connected to the SPI communication interface of the corresponding MEMS gyroscope angular velocity sensor through a level converter. It can realize multi-channel and fast MEMS gyroscope calibration test data acquisition. However, the device is for MEMS gyroscopes, and its required accuracy is lower than that of fiber optic gyroscopes. Utility Model Content

[0005] The purpose of the utility model is to provide a fiber optic gyroscope data acquisition device to overcome the defects of the above-mentioned prior art, which can realize the acquisition of multi-channel and different types of fiber optic gyroscope data, improve the acquisition efficiency and have high integration.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A fiber optic gyroscope data acquisition device comprises a chassis housing and a control circuit module located inside the chassis housing, wherein the control circuit comprises:

[0008] Main power supply;

[0009] An interface board with multiple channels that can connect multiple fiber optic gyroscopes simultaneously;

[0010] A power board connected to the interface board and providing power to the interface board;

[0011] A main control board is connected to the interface board and the power board, and controls the data collection, integration, and transmission of the fiber optic gyroscope, controls the power on and off of the power board, and receives the working circuit data of the power board;

[0012] A display screen connected to the main control board to display the current value of each channel in real time and monitor the power supply status of the fiber optic gyroscope.

[0013] Furthermore, the interface board is provided with 2 to 12 channels and 6 to 36 axes.

[0014] Furthermore, each channel of the interface board is connected to an isolation transformer for electrical isolation.

[0015] Furthermore, the interface board is provided with an interface for connecting to an expansion interface board.

[0016] Furthermore, the power board has multiple independent power supplies inside.

[0017] Furthermore, the number of the independent power supplies is 5 to 60.

[0018] Furthermore, each independent power supply is connected to an isolation transformer for electrical isolation.

[0019] Furthermore, the main control board has an interface for connecting to a host computer. Multi-channel fiber optic gyroscope data will be sent to the main control board at the same time. For high-speed parallel data, the solution adopts field programmable gate array (FPGA) control, and FPGA realizes the functions of parallel data integration, packaging and transmission. FPGA can flexibly configure the baud rate, data length and data rate according to the gyroscope protocol, which can meet the data collection requirements of most gyroscopes. The main control board transmits the integrated data to the host computer stably and reliably through the Ethernet TCP / IP protocol.

[0020] Furthermore, a switch is provided between the main control board and the independent power supply to control the on and off of the independent power supply. The channel to be collected is selected by the host computer. When the collection starts, the independent power supply of the corresponding channel will be turned on, and the independent power supply of the unselected channel will remain in the off state.

[0021] Furthermore, the data acquisition device is also connected to an overload protection circuit, which can automatically cut off the power output when an external short circuit or overload occurs.

[0022] Furthermore, the display screen includes a liquid crystal display screen.

[0023] Furthermore, the collected current data of the channel will be received by the main control board in real time, and the data will be sent to the host computer together with the data of the fiber optic gyroscope, and displayed on the display screen together with the current data.

[0024] Compared with the prior art, the utility model has the following advantages:

[0025] (1) High efficiency. The data acquisition device can collect data from 48 fiber optic gyroscopes at a time. Compared with the traditional data acquisition device that can only collect data from one fiber optic gyroscope at a time, the data acquisition device greatly improves the data acquisition efficiency of the fiber optic gyroscope and further improves the test efficiency of the fiber optic gyroscope. Its advantages are more obvious in large-scale tests. And with the cooperation of the host computer, the automatic test of the high and low temperature, dynamic and static data of the gyroscope can be realized.

[0026] (2) High integration. The data acquisition device realizes the integration of multi-channel gyro data and current data. With the cooperation of the host computer, it is conducive to the analysis and storage of test data.

[0027] (3) Easy maintenance. When using the data acquisition device, you only need to use the host computer to configure the parameters and the test process, and there is no need for testers to be on site. BRIEF DESCRIPTION OF THE DRAWINGS

[0028] Figure 1 It is a schematic diagram of the data acquisition device shown in Example 1;

[0029] Figure 2 This is a connection diagram of the data acquisition device shown in Example 1, the temperature control box and the host computer;

[0030] Description of the markings in the figure:

[0031] 1-interface board, 2-main control board, 3-power board, 4-display screen, 5-main power supply, 6-fiber optic gyroscope, 7-upper machine position, 8-chassis shell, 9-temperature control box. DETAILED DESCRIPTION

[0032] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0033] Example 1

[0034] like Figure 1 As shown, a fiber optic gyro data acquisition device includes a chassis housing 8 and a control circuit module located inside the chassis housing 8, wherein the control circuit includes:

[0035] Main power supply 5;

[0036] An interface board 1 having multiple channels and capable of connecting multiple fiber optic gyroscopes 6 simultaneously;

[0037] A power board 3 connected to the interface board 1 to provide power to the interface board 1;

[0038] The main control board 2 is connected to the interface board 1 and the power board 3, and controls the data collection, integration and transmission of the fiber optic gyroscope 6, controls the power on and off of the power board 3, and receives the working circuit data of the power board 3;

[0039] A display screen 4 connected to the main control board 2 to display the current value of each channel in real time and monitor the power supply status of the fiber optic gyroscope 6.

[0040] In this embodiment, the interface board 1 is provided with 12 channels, 36 axes, connected with 12 sets of three-axis gyroscopes, and has 36 single meters. Each channel of the interface board 1 is connected to an isolation transformer for electrical isolation. The power board 3 has 60 independent power supplies inside. Each independent power supply is connected to an isolation transformer for electrical isolation. The main control board 2 has an interface for connecting to the host computer 7. A switch is provided between the main control board 2 and the independent power supply to control the power on and off of the independent power supply. The channel to be collected is selected by the host computer 7. When the collection starts, the independent power supply of the corresponding channel will be turned on, and the independent power supply of the unselected channel will remain in a power-off state. The data acquisition device is also connected to an overload protection circuit, which can automatically cut off the power output when an external short circuit or overload occurs. The display screen 4 is an LCD screen.

[0041] In this embodiment, the data of the multi-channel fiber optic gyroscope 6 will be sent to the main control board 2 at the same time. For high-speed parallel data, FPGA (Field Programmable Gate Array) field editable gate array control is adopted. The FPGA adopts the Intel Cyclone IV EP4C75 core board to realize the functions of parallel data integration, packaging and transmission. FPGA can flexibly configure the baud rate, data length and data rate according to the gyroscope protocol, which can meet the data collection requirements of most gyroscopes. The main control board 2 transmits the integrated data to the upper machine position 7 stably and reliably through the Ethernet TCP / IP protocol.

[0042] In this embodiment, the interface board uses a standard DB25, including a full-duplex RS422 data channel, five power supplies of ±5V, ±15V, +27V, and a set of ±5V power supply voltage feedback loops, for a total of 60 independent power supplies.

[0043] In this embodiment, the power board 3 adopts an electrical isolation design, and the channels are electrically isolated from each other and from the main control board 2. In the design, the independent power supply of each channel can output five voltages of ±5V, ±15V, and +27V, of which ±5V has a voltage feedback loop to ensure that the voltage at the screw interface end is constant at ±5V.

[0044] In this embodiment, the current data of the collected channel will be received by the main control board 2 in real time, and the data will be sent to the host computer 7 together with the data of the fiber optic gyroscope 6, and displayed on the display screen 4 together with the current data.

[0045] In this embodiment, the LCD display screen adopts a 7-inch capacitive touch screen, which can display the current value of each channel of the gyro acquisition device, and the host computer is a computer.

[0046] The working principle of the data acquisition device is:

[0047] First, the fiber optic gyroscope 6 is connected to the interface board 1, and then the main power supply 5 in the chassis housing 8 is turned on. The host computer 7 sends the configuration command to the main control board 2 through Ethernet, USB, RS-232 or PCI / PCI-E bus protocol according to the data protocol of the fiber optic gyroscope 6. After receiving the configuration command, the main control board 2 starts to configure the power board 3 to output the voltage and current required by the fiber optic gyroscope 6.

[0048] When the host computer 7 sends the "start acquisition" command, the main control board 2 controls the power board 3 to start supplying power to the fiber optic gyroscope 6, and the fiber optic gyroscope 6 starts to send data to the interface board 1, and the interface board 1 sends it to the main control board 2. At the same time, the power board 3 will send the voltage and current value data of each mounted fiber optic gyroscope 6 to the main control board 2. At this time, the main control board 2 starts to integrate and package the data of the mounted multiple fiber optic gyroscopes 6 and the data of the power board 3, and send them to the host computer 7 together. The display screen 4 will synchronously display the voltage and current data of the power board 3 forwarded by the main control board 2.

[0049] When data collection is finished, the host computer 7 sends a collection end command. After receiving the command, the main control board 2 stops sending data and disconnects the power supply of the power board 3. The fiber optic gyroscope 6 will be powered off and stop working.

[0050] When the fiber optic gyroscope mounted on the interface board 1 has an abnormality, such as a short circuit or overload, the main control board 2 will receive an abnormal signal from the power board 3, and then automatically send a power-off command to cut off the power output in time to protect the fiber optic gyroscope 6 and other external devices.

[0051] The above-mentioned acquisition status and output abnormality information will also be displayed in real time on the display 4 as a reference for the tester.

[0052] The fiber optic gyroscope 6 test is divided into normal temperature test, high and low temperature test, static test, and dynamic test. The test equipment needs to meet different test environments and test conditions. The data acquisition device can be connected to the temperature control box 9, the turntable, and the host computer 7 to perform various tests, such as Figure 2 shown.

[0053] The data acquisition device can measure the data of multiple fiber optic gyroscopes 6 at the same time, integrate and package the collected data of multiple gyroscopes, and send the data to the computer through interfaces such as Ethernet or RS-232, and finally the host computer 7 performs data analysis. Through the LCD display screen, the working current, voltage and status information of each fiber optic gyroscope 6 are displayed in real time, and all information is written into the computer memory in real time, and finally the record information of the whole detection process is generated, so as to realize the simultaneous asynchronous acquisition of multiple fiber optic gyroscopes 6 or inertial navigation devices.

[0054] The data acquisition device can independently protect the fiber optic gyroscope 6 in each channel in real time. If there is a functional abnormality or performance change, the data acquisition device can effectively protect the fiber optic gyroscopes 6 of the same batch because it can have a multi-channel isolated power supply protection circuit design. In addition, the data acquisition device is based on an ordinary data acquisition device, and the number of data acquisitions has been expanded. It can collect data from multiple fiber optic gyroscopes 6 at the same time, and can output multi-channel isolated power supplies, and the data of each channel is electrically isolated, which reduces the mutual crosstalk between the fiber optic gyroscopes 6 and improves the efficiency, stability and reliability of data acquisition.

[0055] All modules of the data acquisition device realize automatic management, which not only effectively reduces the complexity of operation, but also reduces a series of problems caused by human operation errors.

[0056] The above description of the embodiments is to facilitate the understanding and use of the utility model by those skilled in the art. It is obvious that those familiar with the art can easily make various modifications to these embodiments and apply the general principles described herein to other embodiments without creative work. Therefore, the utility model is not limited to the above embodiments, and improvements and modifications made by those skilled in the art based on the disclosure of the utility model without departing from the scope of the utility model should be within the scope of protection of the utility model.

Claims

1. A fiber optic gyroscope data acquisition device, characterized in that: It comprises a chassis shell (8) and a control circuit module located inside the chassis shell (8), wherein the control circuit comprises: Main power supply (5); An interface board (1) having multiple channels and capable of connecting multiple fiber optic gyroscopes (6) at the same time; A power board (3) connected to the interface board (1) and providing power to the interface board (1); A main control board (2) connected to the interface board (1) and the power board (3); A display screen (4) connected to the main control board (2) for displaying the current value of each channel in real time and monitoring the power supply status of the fiber optic gyroscope (6); Each channel of the interface board (1) is connected to an isolation transformer for electrical isolation; The power board (3) has multiple independent power supplies inside; Each of the independent power supplies is connected to an isolation transformer for electrical isolation.

2. The fiber optic gyro data acquisition device according to claim 1, characterized in that: The interface board (1) is provided with 2 to 12 channels and has 6 to 36 axes.

3. The fiber optic gyro data acquisition device according to claim 1, characterized in that: The interface board (1) is provided with an interface for connecting to an expansion interface board.

4. The fiber optic gyro data acquisition device according to claim 1, characterized in that: The number of the independent power supplies is 10 to 60.

5. The fiber optic gyro data acquisition device according to claim 1, characterized in that: A switch is provided between the main control board (2) and the independent power supply.

6. The fiber optic gyro data acquisition device according to claim 1, characterized in that: The data acquisition device is also connected to an overload protection circuit.

7. The fiber optic gyro data acquisition device according to claim 1, characterized in that: The main control board (2) has an interface for connecting to a host computer (7).

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