Automatic calibration device for analog quantity acquisition interface of spaceborne aircraft and implementation method of automatic calibration device

Abstract

The invention discloses an automatic calibration device for an analog quantity acquisition interface of a spaceborne aircraft and an implementation method of the automatic calibration device. The automatic calibration device comprises a control module which is used for controlling a voltage-stabilizing source module and a matrix change-over switch, wherein the voltage-stabilizing source module outputs power supply voltages of different gears and serves as input signals for analog quantity sampling, and voltage values output by a voltage-stabilizing source are collected; the matrix change-over switch is used for sequentially switching the output of a single voltage stabilization source to a plurality of spaceborne aircraft analog quantity acquisition channels; the ground test cable is used for realizing hardware connection of each interface; the telemetering receiving and processing module is used for receiving and analyzing satellite telemetering data and acquiring an analog quantity acquisition voltage value of the spaceborne aircraft; the formula calibration fitting module carries out fitting based on the voltage stabilization source output voltage value and the spaceborne aircraft analog quantity acquisition voltage value; and the fitting data export module is used for exporting a fitting result value. According to the invention, automatic calibration of the analog quantity acquisition interface of the satellite-borne aircraft is realized.

Description

Technical Field

[0001] The present invention belongs to the field of spaceborne electronic technology, and particularly relates to an automatic calibration device for an analog quantity acquisition interface of a spaceborne computer and a method for realizing the same. Background Art

[0002] When testing a satellite spaceborne computer, it is necessary to calculate and calibrate the formula of the analog quantity acquisition interface. Currently, for the calibration of the spaceborne computer interface, a manual calibration method is adopted. Different voltage gear values are sequentially output to different analog quantity acquisition interfaces of the spaceborne computer through a voltage stabilizer source, and a 6 1 / 2-digit digital multimeter is used to collect the output voltage value of the spaceborne computer. By obtaining the telemetry voltage value transmitted by the spaceborne computer through telemetry, after obtaining the above data, the slope and intercept values of the calibration linear formula are calculated using the least squares method. In this solution, an artificial method is used to control the output of the voltage stabilizer source, read the parameters of the multimeter, and the satellite telemetry analog quantity acquisition value, and then calculate the least squares formula value through excel. It is necessary to calibrate a large amount of analog quantity acquisition data, occupying a large amount of labor costs and being unable to meet the requirements of batch and automatic testing of the spaceborne computer.

[0003] The mass production of commercial satellites requires a large number of satellite platforms to be supported. As the "brain" of the satellite platform, the satellite spaceborne computer is a key link in the mass production of satellites, and its production and manufacturing efficiency also affects the satellite development cycle. In the spaceborne computer test project, it is necessary to calibrate the analog quantity acquisition interface. However, due to the large number of analog quantity channel interfaces and calibration points of the spaceborne computer, for the calibration of one channel, it is necessary to sample the device sampling voltage value and the spaceborne computer sampling voltage value at 30 points respectively through the analog quantity channel, and then perform formula fitting, which takes about 1 hour. To sum up, the disadvantages of the existing satellite spaceborne computer analog quantity interface calibration method are as follows:

[0004] The calibration process is complex. It is necessary to physically connect the analog quantity output end, the reference voltage measurement end, and the analog quantity acquisition end of the spaceborne computer in sequence through a manual method using patch cables and tooling. Due to the large number of analog quantity interfaces, this method not only has extremely low efficiency but also is prone to connection errors, resulting in quality and safety problems of the product.

[0005] The data synchronization, accuracy, analog quantity reference measurement data, spaceborne computer sampling data, etc. are all viewed and recorded manually. The reference sampling voltage and the spaceborne computer sampling voltage value are recorded at different time periods. In addition, the manual recording method may have problems such as inaccurate recording operations and recording results of the recorded data, which may all lead to errors in the linear fitting result. Summary of the Invention

[0006] In view of the above problems, the present invention provides an automatic calibration device for an analog quantity acquisition interface of a spaceborne computer and a method for realizing the same, aiming to realize the automatic calibration of the analog quantity acquisition interface of the satellite spaceborne computer.

[0007] To achieve the above object, the present invention provides an automatic calibration device for the analog quantity acquisition interface of an on-board computer, which includes a voltage stabilizer module, a matrix switch, a ground test cable, a control module, a telemetry receiving and processing module, a formula calibration fitting module, and a fitting data export module. Among them, the control module is used to control the voltage stabilizer module and the matrix switch to achieve:

[0008] The voltage stabilizer module outputs power supply voltages at different gears and serves as the input signal for analog quantity sampling, and collects the output voltage value of the voltage stabilizer;

[0009] The matrix switch sequentially switches the output of a single voltage stabilizer to multiple on-board computer analog quantity acquisition channels;

[0010] The ground test cable is used to realize the interface hardware connection between the voltage stabilizer module, the matrix switch and the device under test;

[0011] The telemetry receiving and processing module is used to receive satellite telemetry data and parse it to obtain the on-board computer analog quantity acquisition voltage value;

[0012] The formula calibration fitting module performs fitting based on the output voltage value of the voltage stabilizer and the on-board computer analog quantity acquisition voltage value;

[0013] The fitting data export module is used to export the fitting result value.

[0014] A further technical solution of the present invention is that the voltage stabilizer module includes a programmable voltage stabilizer and a programmable digital multimeter. The programmable voltage stabilizer is used to output power supply voltages at different gears as the input signal for analog quantity sampling; the programmable digital multimeter serves as a standard measuring device and is used to collect the output voltage value of the voltage stabilizer.

[0015] A further technical solution of the present invention is that the control module includes a voltage stabilizer control module, a digital multimeter control module, and a matrix switch switching control module. The voltage stabilizer control module is used to program the voltage stabilizer to output voltage values at different gears; the digital multimeter control module is used to control the digital multimeter to collect the output voltage value of the voltage stabilizer as the reference / standard measurement value; the matrix switch switching control module is used to program the matrix switch to sequentially switch the analog quantity channels to realize the physical connection between the voltage stabilizer channel and the on-board computer analog quantity interface.

[0016] A further technical solution of the present invention is that the device further includes a serial port adapter, which is used to adapt the communication between the on-board computer and the control module, the telemetry receiving and processing module, the formula calibration fitting module, and the fitting data export module.

[0017] A further technical solution of the present invention is that the formula calibration fitting module performs formula fitting based on the output voltage value of the voltage regulator and the voltage value of the satellite-borne aircraft analog quantity acquisition according to the least squares method to obtain the slope and intercept values ​​of the fitted formula.

[0018] Another aspect of the present invention provides an implementation method of the above-mentioned automatic calibration device for the analog quantity acquisition interface of a satellite-borne aircraft, which specifically includes the following steps:

[0019] Control the voltage stabilization source module to output calibrated voltage values ​​at different gears as the input source of the satellite-borne aircraft analog quantity acquisition interface;

[0020] Control the voltage stabilization source module to collect the actual voltage value of the current calibration channel;

[0021] The telemetry receiving and processing module obtains the telemetry data information transmitted by the satellite-borne aircraft, and obtains the analog quantity acquisition voltage data of each interface of the satellite-borne aircraft from the telemetry information;

[0022] The formula calibration fitting module determines the calibration status of the current channel and whether the current calibration channel has completed the acquisition of all calibration points. If it has been completed, the least squares formula fitting is performed on the acquired data; if it has not been completed, the voltage stabilization source module is controlled to output the calibration voltage of the next gear.

[0023] The fitting data export module determines the status of all calibration channels and whether all channels have completed calibration. If completed, the calibration fitting results of all channels are exported and the results are exported locally, ending the entire calibration process. If not completed, the matrix switch is controlled to switch channels and switch to the next calibration channel for acquisition and calibration, and the physical channel connection from the voltage stabilizing source module to different analog sampling channels of the satellite aircraft is established in a time-sharing manner.

[0024] The embodiment of the present disclosure provides an automatic calibration device for the analog quantity acquisition interface of a satellite-borne aircraft and an implementation method thereof, which can realize the automatic calibration of the analog quantity acquisition interface of the satellite-borne aircraft to solve the shortcomings of the current calibration method of the analog quantity interface of the satellite-borne aircraft and meet the needs of batch and automatic testing of satellite-borne aircraft. Specifically, the present invention mainly solves the following problems:

[0025] To solve the problems of complex manual operation, low test efficiency, and misoperation, through the programmable voltage regulator, digital multimeter, and matrix switching switch, the output voltage and voltage collection, telemetry voltage collection, and automatic formula fitting calculation according to different measurement gears are realized, and the analog interface calibration process is fully automated, which improves the interface test efficiency and avoids misoperation problems caused by manual errors.

[0026] Data sampling is achieved within the same reference time range through program control to avoid numerical errors caused by manual recording of time differences. Analog quantity collection, filling and calculation formulas are automatically calculated and calibrated and output to the local computer.

[0027] The beneficial effects of the present invention specifically include:

[0028] Design and develop an automatic calibration device for the analog quantity acquisition interface of the satellite on-board computer, realizing the automatic calibration of the analog quantity acquisition interface of the satellite on-board computer. It can automatically control the output voltage of the regulated power supply, the standard device collects standard voltage data, obtains the telemetry analog quantity acquisition voltage of the on-board computer, automatically performs curve fitting on the collected data, and generates an interface calibration formula.

[0029] The control module can send control instructions to the regulated power supply and digital multimeter through the Ethernet interface, and can read the channel sampling data of the regulated power supply and digital multimeter;

[0030] The telemetry receiving and processing module can obtain the telemetry parameters of the on-board computer through the network, and obtain the real-time voltage acquisition value of the corresponding analog quantity acquisition channel from the parameters;

[0031] The formula calibration fitting module can fit the voltage collected by the digital multimeter near the same time point and the voltage collected by the analog quantity channel of the on-board computer using the least squares method to obtain the best linear fitting curve, slope, and intercept;

[0032] The fitting data export module can also export the parameter fitting result values of the analog quantity acquisition interface of each channel in text form and store them in the local storage, facilitating subsequent users to view and use the fitting result data.

[0033] It should be understood that the above general description and the following detailed description are only exemplary and explanatory, and cannot limit the present disclosure. Brief Description of the Drawings

[0034] The drawings herein are incorporated into the specification and constitute a part of the specification, showing embodiments consistent with the present invention, and are used together with the specification to explain the principles of the present invention.

[0035] Figure 1 It is a schematic diagram of the structure and connection relationship of the automatic calibration device for the analog quantity acquisition interface of the on-board computer in the embodiment of the present invention;

[0036] Figure 2 It is a flowchart of the implementation method of the automatic calibration device for the analog quantity acquisition interface of the on-board computer in the embodiment of the present invention. Detailed Embodiment

[0037] The present invention will be further described in detail below in conjunction with the drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present invention, rather than limiting the present invention. Additionally, it should be noted that for the sake of description, only parts related to the present invention rather than all structures are shown in the drawings.

[0038] Before discussing the exemplary embodiments in more detail, it should be noted that some exemplary embodiments are described as processes or methods depicted as flowcharts. Although the flowcharts depict the steps as sequential processes, many of the steps can be implemented in parallel, concurrently, or simultaneously. In addition, the order of the steps can be rearranged. The process can be terminated when its operations are completed, but it can also have additional steps not included in the figures. The process can correspond to a method, function, procedure, subroutine, subprogram, etc.

[0039] The application scenarios of the present invention are mainly for the acquisition voltage input control of the analog quantity acquisition interface of the spaceborne machine, the acquisition of the interface voltage input value, the automatic fitting calibration of data, the automatic generation of the calibration structure, etc.

[0040] As Figure 1 shown, an automatic calibration device for the analog quantity acquisition interface of a spaceborne machine mainly includes two major parts: hardware and software. The hardware is mainly used to obtain the telemetry acquisition voltage of the spaceborne machine, output the calibration voltage, and acquire the actual output voltage value. The software is mainly used for the program control of the test equipment, and to parse and obtain the telemetry voltage acquired by the spaceborne machine and the automatic formula calibration. Specifically, it includes a voltage stabilizer module, a matrix switch 100, a ground test cable 200, a control module, a telemetry receiving and processing module 300, a formula calibration fitting module 400, and a fitting data export module 500.

[0041] Among them, the control module is used to control the voltage stabilizer module and the matrix switch 100 to achieve:

[0042] The voltage stabilizer module outputs different gear supply voltages as the input signal for analog quantity sampling, and acquires the output voltage value of the voltage stabilizer;

[0043] The matrix switch 100 sequentially switches the output of a single voltage stabilizer to multiple analog quantity acquisition channels of the spaceborne machine;

[0044] The ground test cable 200 is used to realize the interface hardware connection between the voltage stabilizer module, the matrix switch 200 and the device under test;

[0045] The telemetry receiving and processing module 300 is used to receive satellite telemetry data, parse the analog quantity telemetry sub-packet data transmitted in a packaged manner by the spaceborne machine, and obtain the analog quantity acquisition voltage value of the spaceborne machine;

[0046] The formula calibration fitting module 400 is used to obtain the standard voltage output value and the analog quantity sampling value, perform formula fitting according to the least squares method, and calculate the slope and intercept values of the formula after linear fitting;

[0047] The fitting data export module 500 is used to export the linear fitting result value to the local for subsequent recording, viewing, and use.

[0048] The regulated power supply module includes a programmable regulated power supply 600 and a programmable digital multimeter 700. The programmable regulated power supply 600 is used to output power supply voltages of different gears as input signals for analog quantity sampling; the programmable digital multimeter 700, as a standard measuring device, is used to collect the output voltage value of the regulated power supply.

[0049] The control module includes a regulated power supply control module 610, a digital multimeter control module 720, and a matrix switch switching control module 110. The regulated power supply control module 610 is used to program the regulated power supply to output voltage values of different gears; the digital multimeter control module 720 is used to control the digital multimeter to collect the voltage value output by the regulated power supply as a reference / standard measurement value; the matrix switch switching control module 110 is used to program the matrix switch to sequentially switch the analog quantity channels to realize the physical connection between the regulated power supply channel and the on-board computer analog quantity interface.

[0050] The device further includes a serial port adapter 800, which is used to adapt the communication between the on-board computer and the control module, the telemetry receiving and processing module 300, the formula calibration fitting module 400, and the fitting data export module 500.

[0051] The formula calibration fitting module 400 performs formula fitting according to the least squares method based on the output voltage value of the regulated power supply and the voltage value collected by the on-board computer for analog quantity to obtain the slope and intercept values of the fitted formula.

[0052] Another embodiment provides an implementation method of the on-board computer analog quantity acquisition interface automatic calibration device as described above, mainly realizing the output control of the regulated power supply, the acquisition of the calibration voltage, the switching control of the matrix switch, the parsing and processing of the telemetry data, the formula fitting of the acquired data, and the export of the fitting calibration result. As Figure 2 shown, the on-board computer analog quantity acquisition interface automatic calibration process includes the following steps:

[0053] Regulated power supply output control: Control the regulated power supply module to output calibration voltage values of different gears as the input source of the on-board computer analog quantity acquisition interface;

[0054] Calibration voltage acquisition: Control the regulated power supply module to collect the actual measured voltage value of the current calibration channel; use the voltage collected by the digital multimeter as the standard acquisition value, and program the digital multimeter to collect the actual measured voltage value of the current calibration channel;

[0055] Telemetry data parsing and processing: The telemetry receiving and processing module obtains the telemetry data information transmitted by the on-board computer and obtains the analog quantity acquisition voltage data of each interface of the on-board computer from the telemetry information;

[0056] Current channel calibration status judgment: The formula calibration fitting module judges the current channel calibration status and determines whether the current calibration channel has completed all calibration point acquisitions. If completed, the least squares formula is fitted to the acquired data to obtain the formula calibration coefficient; if not completed, the voltage regulator module is controlled to output the calibration voltage of the next gear;

[0057] Judgment of the status of all calibration channels: The fitting data export module judges the status of all calibration channels to determine whether all channels have completed calibration. If completed, the calibration fitting results of all channels are exported, and the results are exported to the local in .txt and .xls formats to facilitate testers to record and view the fitting results, and end the entire calibration process at the same time; if not completed, the matrix switch is controlled to switch channels and switch to the next calibration channel for acquisition and calibration, and the physical channel connection from the voltage regulator module to different analog sampling channels of the satellite aircraft is established in a time-sharing manner.

[0058] The above embodiments provide a device for calibrating the satellite-borne aircraft analog quantity acquisition interface and its implementation method, compared with the prior art:

[0059] The measurement data acquisition methods are different. The interaction between the device and the test equipment is all software-controlled. According to the test equipment communication protocol, the voltage stabilizer, digital multimeter, matrix switch, etc. are controlled through Ethernet to perform voltage output, data collection, switch switching and other actions.

[0060] The calibration interface switching method is different from the manual method, in which the connection cables between the satellite-borne aircraft analog quantity acquisition interface and the test equipment are manually replaced one by one. This device connects all the satellite-borne aircraft analog quantity acquisition interfaces and the test equipment measurement\acquisition interfaces to the matrix switch respectively, and switches them in sequence through the matrix switch to realize the time-sharing calibration of different analog quantity acquisition interfaces.

[0061] The fitting calibration method is different. The device can obtain the voltage collected by the digital multimeter near the same time point and the voltage collected by the analog channel of the satellite-borne aircraft, and use the least squares method to fit it to calculate the best linear fitting curve, slope and intercept;

[0062] In this document, the terms "comprises," "comprising" or any other variations thereof are intended to cover non-exclusive inclusion, such that a step or method that includes a series of elements includes not only those elements, but also includes other elements not explicitly listed, or also includes elements inherent to such step or method.

[0063] The above content is a further detailed description of the present invention in combination with specific preferred embodiments. It cannot be determined that the specific implementation of the present invention is only limited to these descriptions. For those of ordinary skill in the technical field to which the present invention pertains, without departing from the concept of the present invention, several simple deductions or substitutions can be made, and all should be regarded as belonging to the protection scope of the present invention.

Claims

1. An automatic calibration device for a satellite-borne aircraft analog quantity acquisition interface, characterized in that: It includes a voltage stabilizing source module, a matrix switching switch, a ground test cable, a control module, a telemetry receiving and processing module, a formula calibration fitting module and a fitting data export module, wherein the control module is used to control the voltage stabilizing source module and the matrix switching switch to respectively realize: The voltage stabilizing source module outputs power supply voltages of different gears as input signals for analog quantity sampling, and collects the output voltage value of the voltage stabilizing source; The matrix switching switch sequentially switches the output of a single voltage stabilizing source to multiple satellite-borne aircraft analog quantity acquisition channels; The ground test cable is used to realize the interface hardware connection between the voltage stabilizing source module, the matrix switching switch and the device under test; The telemetry receiving and processing module is used to receive and analyze satellite telemetry data to obtain the voltage value of the satellite-borne aircraft analog quantity acquisition; The formula calibration fitting module performs fitting based on the output voltage value of the voltage stabilizing source and the voltage value of the satellite-borne aircraft analog quantity acquisition; The fitting data export module is used to export the fitting result value.

2. The automatic calibration device for the analog quantity acquisition interface of a satellite-borne aircraft according to claim 1 is characterized in that: The voltage stabilizing source module includes a programmable voltage stabilizing source and a programmable digital multimeter. The programmable voltage stabilizing source is used to output power supply voltages of different gears as input signals for analog quantity sampling; the programmable digital multimeter is used as a standard measuring device to collect the output voltage value of the voltage stabilizing source.

3. The automatic calibration device for the analog quantity acquisition interface of a satellite-borne aircraft according to claim 2 is characterized in that: The control module includes a voltage stabilizer control module, a digital multimeter control module and a matrix switch switching control module. The voltage stabilizer control module is used to program the voltage stabilizer to output different gear voltage values; the digital multimeter control module is used to control the digital multimeter to collect the voltage value output by the voltage stabilizer as a reference / standard measurement value; the matrix switch switching control module is used to program the matrix switch to switch the analog channels in turn to realize the physical connection between the voltage stabilizer channel and the satellite-borne aircraft analog interface.

4. The automatic calibration device for the analog quantity acquisition interface of a satellite-borne aircraft according to claim 1 is characterized in that: The device also includes a serial port adapter for adapting the communication between the satellite-borne machine and the control module, the telemetry receiving and processing module, the formula calibration fitting module and the fitting data export module.

5. The automatic calibration device for the analog quantity acquisition interface of a satellite-borne aircraft according to claim 1 is characterized in that: The formula calibration fitting module performs formula fitting based on the output voltage value of the voltage stabilizing source and the voltage value of the satellite-borne aircraft analog quantity acquisition according to the least square method to obtain the slope and intercept values ​​of the fitted formula.

6. A method for implementing the automatic calibration device for the analog quantity acquisition interface of a satellite-borne aircraft according to any one of claims 1 to 5, characterized in that: The specific steps include: Control the voltage stabilization source module to output calibrated voltage values ​​at different gears as the input source of the satellite-borne aircraft analog quantity acquisition interface; Control the voltage stabilization source module to collect the actual voltage value of the current calibration channel; The telemetry receiving and processing module obtains the telemetry data information transmitted by the satellite-borne aircraft, and obtains the analog quantity acquisition voltage data of each interface of the satellite-borne aircraft from the telemetry information; The formula calibration fitting module determines the calibration status of the current channel and whether the current calibration channel has completed the acquisition of all calibration points. If it has been completed, the least squares formula fitting is performed on the acquired data; if it has not been completed, the voltage stabilization source module is controlled to output the calibration voltage of the next gear. The fitting data export module determines the status of all calibration channels to determine whether all channels have completed calibration. If so, it exports the calibration fitting results of all channels and exports the results to the local computer, thus ending the entire calibration process. If it is not completed, the matrix switch is controlled to switch channels, switch to the next calibration channel for acquisition calibration, and establish the physical channel connection from the voltage stabilization source module to different analog sampling channels of the satellite aircraft in a time-sharing manner.

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