CN110987444A - Calibration device and calibration method for time zero of multi-parameter test system - Google Patents
Calibration device and calibration method for time zero of multi-parameter test system Download PDFInfo
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- CN110987444A CN110987444A CN201911284452.6A CN201911284452A CN110987444A CN 110987444 A CN110987444 A CN 110987444A CN 201911284452 A CN201911284452 A CN 201911284452A CN 110987444 A CN110987444 A CN 110987444A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/02—Details or accessories of testing apparatus
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01M—TESTING STATIC OR DYNAMIC BALANCE OF MACHINES OR STRUCTURES; TESTING OF STRUCTURES OR APPARATUS, NOT OTHERWISE PROVIDED FOR
- G01M15/00—Testing of engines
- G01M15/04—Testing internal-combustion engines
- G01M15/05—Testing internal-combustion engines by combined monitoring of two or more different engine parameters
Abstract
The invention discloses a calibration device and a calibration method for time zero of a multi-parameter test system, wherein the calibration device comprises the multi-parameter test system, an air source generating device and a time acquisition device; the gas source generating device comprises a gas pressure generator, a solenoid valve, a testing tool and a pressure sensor, wherein the gas inlet end of the solenoid valve is connected with the gas pressure generator, the gas outlet end of the solenoid valve is connected with the testing tool, and the pressure sensor is connected with the testing tool to measure the pressure of the testing tool; the time acquisition device comprises a multi-channel digital storage oscilloscope; the multi-parameter testing system comprises a computer, a signal acquisition card, a program-controlled power supply, a direct-current power supply, a 5V trigger power supply module and a voltage signal transfer box, wherein the signal acquisition card comprises a pressure acquisition card, a torque acquisition card, a temperature acquisition card and a force value acquisition card. The invention can accurately calibrate the time zero point of each parameter of the multi-parameter test system.
Description
Technical Field
The invention relates to a calibration device and a calibration method for time zero of a multi-parameter test system, and belongs to the technical field of time zero calibration of multi-parameter test systems.
Background
The multi-parameter testing system is mainly applied to testing of attitude and orbit control engine field tests. The main parameters are force values, temperature, torque, pressure, etc. In the test process, the test software sends an ignition instruction to control the program-controlled power supply to simultaneously output 27V ignition voltage and 5V trigger voltage to a gas generator and a valve control system of the attitude and orbit control engine to start working respectively, and the ignition voltage and the 5V trigger voltage are used as time zero points of the test. Data recording is performed on the basis of the time zero point for each parameter. And each action command of the attitude and orbit control engine is accurate to millisecond. If the time zero points of the parameters are inconsistent and the time zero points of the 27V ignition voltage and the 5V trigger voltage are inconsistent, the relationship between the parameters cannot be correctly corresponding in the later data analysis process, and the design of the attitude and orbit control engine flight attitude is influenced. In the conventional calibration process, only the accuracy of the numerical values of all parameters can be ensured, and the data of all parameters can not be acquired on the basis of taking the ignition voltage as the time zero point, so that the uniformity of the time zero point of all parameters can not be ensured.
Disclosure of Invention
The technical problem to be solved by the invention is as follows: the calibration device and the calibration method for the time zero of the multi-parameter test system are provided to solve the technical problems that the existing calibration method cannot collect data of each parameter by taking ignition voltage as the time zero, cannot ensure the uniformity of the time zero of each parameter, and further influences the design of the attitude and orbit control engine flight attitude.
The technical scheme of the invention is as follows: a calibration device for time zero of a multi-parameter test system comprises the multi-parameter test system, an air source generating device and a time collecting device;
the gas source generating device comprises a gas pressure generator, an electromagnetic valve, a testing tool and a pressure sensor, wherein the gas inlet end of the electromagnetic valve is connected with the gas pressure generator, the gas outlet end of the electromagnetic valve is connected with the testing tool, and the pressure sensor is connected with the testing tool to measure the pressure of the testing tool;
the time acquisition device comprises a multi-channel digital storage oscilloscope;
the multi-parameter testing system comprises a computer, a signal acquisition card, a program-controlled power supply, a direct-current power supply, a 5V trigger power supply module and a voltage signal transfer box, wherein the signal acquisition card comprises a pressure acquisition card, a torque acquisition card, a temperature acquisition card and a force value acquisition card;
the voltage signal line of the pressure sensor is electrically connected with the input end of the voltage signal adapter box, the output end of the voltage signal adapter box is respectively connected with the input end of the signal acquisition card, and the multi-channel digital storage oscilloscope is electrically connected to transmit the acquired pressure signal, and the torque signal, the temperature signal and the force value signal acquired by the test system to the signal acquisition card and the multi-channel digital storage oscilloscope, the output end of the signal acquisition card is electrically connected with the input end of the computer, the computer is electrically connected with the programmable power supply, the programmable power supply is respectively connected with the control ends of the electromagnetic valves, the computer is electrically connected with the 5V trigger power supply module, and the 5V trigger power supply module is electrically connected with the multi-channel digital storage oscilloscope; the direct current power supply is electrically connected with the pressure sensor.
Preferably, the gas source generating device further comprises a digital display pressure gauge, and the digital display pressure gauge is connected with the gas pressure generator and is used for measuring the pressure of the gas pressure generator.
Preferably, the air inlet end of the electromagnetic valve is connected with the gas pressure generator through a test tube.
The invention also provides a calibration method of the calibration device, which comprises the following steps:
setting the electromagnetic valve to be in a closed state, starting pressure accumulation by the gas pressure generator, and displaying the current pressure value by the digital display pressure gauge;
the computer sends an ignition instruction to control the programmable power supply to output voltage, the electromagnetic valve is triggered to be opened to release the pressure in the gas pressure generator, meanwhile, the pressure sensor collects the pressure value in the testing tool and converts the pressure value into a voltage value to be input into the voltage signal adapter box, and the testing system transmits the collected torque signal, temperature signal and force value signal to the voltage signal adapter box;
the voltage signal adapter box outputs a voltage signal, a torque signal, a temperature signal and a force value signal to the multi-channel digital storage oscilloscope, and simultaneously inputs the voltage signal, the torque signal, the temperature signal and the force value signal to the signal acquisition card;
the multi-parameter testing system processes and displays the signal images;
when an ignition instruction is sent out, the computer simultaneously inputs the 27V voltage for triggering the electromagnetic valve and the 5V voltage signal for triggering the valve into the multi-channel digital storage oscilloscope, and corrects the time zero point of the 5V voltage signal for triggering the valve by taking the time zero point of the 27V voltage acquired by the multi-channel digital storage oscilloscope as a reference, so that the time zero point of the 5V voltage signal is the same as the time zero point of the 27V voltage;
calibrating the images of all the signals processed and displayed by the multi-parameter testing system by taking the images acquired by the multi-channel digital storage oscilloscope as a standard;
and correcting the time zero point of the voltage signal generated by the voltage sensor and correcting the time zero points of the torque signal, the temperature signal and the force value signal of the multi-parameter testing system by taking the time zero point of the 27V voltage and the standard starting time of the electromagnetic valve as the reference.
Preferably, the standard starting time of the electromagnetic valve is the time from the time when the programmable power supply sends the voltage signal to the time when the electromagnetic valve is started.
The invention has the beneficial effects that: the invention can realize that the test software sends an ignition instruction to control the programmable power supply to output the ignition current, and starts to collect all parameters by taking the received ignition current as the time zero point, and the time zero point of each parameter can be accurately calibrated by the technical index of the electromagnetic valve and the collection of the action time of the electromagnetic valve.
Drawings
FIG. 1 is a schematic view of the calibration apparatus as a whole;
FIG. 2 is a schematic flow chart of a calibration method;
FIG. 3 is a schematic diagram of the connection of the voltage signal patch panel;
FIG. 4 is a schematic diagram of an oscilloscope collecting data images;
FIG. 5 is a schematic diagram of an image of data collected by the test system
In the figure, 1-a computer, 2-a programmable power supply, 3-a pressure acquisition card, 4-a voltage signal transfer box, 5-a direct current power supply, 6-a digital display pressure gauge, 7-a gas pressure generator, 8-a pressure sensor, 9-a multi-channel digital storage oscilloscope, 10-a first voltage signal line, 11-a first 27V electromagnetic valve trigger power line, 12-a pressure sensor power supply line, 13-an electromagnetic valve, 14-a test tube, 15-a test tool, 16-a LAN line, 17-a second voltage signal line, 18-a third voltage signal line, 19-a force value acquisition card, 20-a temperature acquisition card, 21-a torque acquisition card, 22-5V trigger power module, 23-5V trigger valve power line and 24-a second 27V electromagnetic valve trigger power line.
Detailed Description
The invention will be further described with reference to the following drawings and specific embodiments:
referring to fig. 1 to 5, a calibration apparatus for a time zero point of a multi-parameter testing system according to an embodiment of the present invention includes a multi-parameter testing system, an air source generating device, and a time collecting device.
The gas source generating device comprises a gas pressure generator 7, a solenoid valve 13, a testing tool 15 and a pressure sensor 8, wherein the gas inlet end of the solenoid valve 13 is connected with the gas pressure generator 7 through a testing pipe 14, the gas outlet end of the solenoid valve 13 is connected with the testing tool 15, and the pressure sensor 8 is connected with the testing tool 15 to measure the pressure of the testing tool 15. Specifically, the test tube 14 and the test fixture 15 are both tubular, wherein one end of the test tube 14 is fixedly connected to the gas pressure generator 7, the other end of the test tube 14 is fixedly connected to the air inlet end of the electromagnetic valve 13, the test fixture 15 is installed on the air outlet end of the electromagnetic valve 13, and the pressure sensor 8 is installed on the test fixture 15.
Preferably, the gas source generating device further comprises a digital pressure gauge 6, and the digital pressure gauge 6 is connected with the gas pressure generator 7 and used for measuring the pressure of the gas pressure generator 7 so as to visually observe the working state of the gas pressure generator 7 during calibration.
The time acquisition device comprises a multi-channel digital storage oscilloscope 9, and the multi-channel digital storage oscilloscope 9 is mainly used for storing and displaying various voltage signals.
The multi-parameter testing system comprises a computer 1, a signal acquisition card, a program-controlled power supply 2, a direct-current power supply 5, a 5V trigger power supply module 22 and a voltage signal transfer box 4, wherein the signal acquisition card comprises a pressure acquisition card 3, a torque acquisition card 21, a temperature acquisition card 20 and a force value acquisition card 19 so as to acquire and measure various parameters of the attitude and orbit control engine.
The output of the pressure sensor 8 is electrically connected with the input end of the voltage signal adapter box 4 through a second voltage signal line 17, the output end of the voltage signal adapter box 4 is electrically connected with the input end of the signal acquisition card through a third voltage signal line 18, and is electrically connected with the multi-channel digital storage oscilloscope 9 through a first voltage signal line 10, so as to transmit the acquired pressure signal, and the torque signal, the temperature signal and the force value signal acquired by the test system to the signal acquisition card and the multi-channel digital storage oscilloscope 9, the output end of the signal acquisition card is electrically connected with the input end of the computer 1, the computer 1 is electrically connected with the program control power supply 2 through a LAN line 16, the program control power supply 2 is respectively electrically connected with the control end of the electromagnetic valve 13 through a first 27V electromagnetic valve trigger power supply line 11, and is electrically connected with the multi-channel digital storage oscilloscope 9 through, the computer 1 is electrically connected with a 5V trigger power supply module 22 through a 5V trigger valve power supply line 23, and the 5V trigger power supply module 22 is electrically connected with the multi-channel digital storage oscilloscope 9; the dc power supply 5 is electrically connected to the pressure sensor 8 via a pressure sensor power supply line 12.
The calibration method of the calibration device in the embodiment of the invention comprises the following steps:
s1, the solenoid valve 13 is set to be closed, the gas pressure generator 7 is started to accumulate pressure, and the digital display pressure gauge 6 displays the current pressure value.
S2, the computer 1 sends an ignition instruction to control the programmable power supply 2 to output 27V voltage, the electromagnetic valve 13 is triggered to open and release the pressure in the gas pressure generator 7, meanwhile, the pressure sensor 8 collects the pressure value in the test tool 15 and converts the pressure value into a voltage value to be input into the voltage signal adapter box 4, and the test system transmits the collected torque signal, temperature signal and force value signal to the voltage signal adapter box 4.
S3, the voltage signal transfer box 4 outputs the voltage signal, the torque signal, the temperature signal and the force value signal to the multi-channel digital storage oscilloscope 9, and inputs the voltage signal, the torque signal, the temperature signal and the force value signal to the signal acquisition card, as shown in FIG. 3.
S4, processing and displaying each signal image by the multi-parameter testing system;
and S5, when an ignition instruction is sent, the computer 1 simultaneously inputs the 27V voltage of the trigger electromagnetic valve 13 and the 5V voltage signal of the trigger valve into the multi-channel digital storage oscilloscope 9, and corrects the time zero point of the 5V voltage signal of the trigger valve by taking the time zero point of the 27V voltage acquired by the multi-channel digital storage oscilloscope 9 as a reference, so that the time zero point of the 5V voltage signal is the same as the time zero point of the 27V voltage. As shown in fig. 4, the start point of the pulse waveform of the 27V ignition voltage and the 5V trigger voltage coincides, and this start point serves as a time zero point.
And S6, calibrating the images of the signals processed and displayed by the multi-parameter testing system by taking the images acquired by the multi-channel digital storage oscilloscope 9 as a standard.
And S7, correcting the time zero point of the voltage signal generated by the voltage sensor and correcting the time zero points of the torque signal, the temperature signal and the force value signal of the multi-parameter test system by taking the time zero point of the 27V voltage and the standard starting time of the electromagnetic valve 13 as the reference so as to ensure that the uniformity of the time zero points of all parameters of each test system is consistent. Specifically, the standard starting time of the electromagnetic valve 13 is the time from the time when the programmable power supply 2 sends the voltage signal to the time when the electromagnetic valve 13 is started.
If the uniformity of time zero of each parameter of the test system is inconsistent, the time zero of each parameter of the test system can be corrected and then recalibrated.
The invention can realize that the test software sends an ignition instruction to control the programmable power supply 2 to output the ignition current, and the received ignition current is used as the time zero point to start the acquisition of each parameter. Through the technical indexes of the electromagnetic valve 13 and the collection of the action time of the electromagnetic valve 13, the time zero point of each parameter can be accurately calibrated, as shown in the formula (1). And if the time zero points of all the parameters are inconsistent, time correction can be carried out on the test software, so that the accuracy of the design of the flying attitude of the attitude and orbit control engine in the later period is ensured.
t0＝t1(1)
t0The time at which the recording was started with the ignition voltage as time zero is used for each parameter.
t1The time is when the solenoid valve 13 starts operating with the ignition voltage as the time zero point.
In addition, whether the 5V trigger voltage time is consistent with the 27V ignition voltage time can be calibrated by the multi-channel digital storage oscilloscope 9, and the 27V ignition voltage is used as a time zero point for correction, as shown in formula (2).
t2＝t3-t4(2)
t2The difference between the trigger voltage time of 5V and the ignition voltage time of 27V.
t3Is 5V trigger voltage time.
t4Trigger voltage time, t, of 27V4＝0
The technical specification and the actual measured actuation time of the solenoid valve 13 is 50 ms. If the time zero of each parameter is consistent, the waveform measured by the test system should begin to be displayed 50ms after the time zero, as shown in FIG. 5.
According to the formula (1), the time (t) when each parameter of the test system begins to be recorded by taking the ignition voltage as the time zero point0) Time (t) at which the solenoid valve 13 starts operating with the ignition voltage as time zero1) All of which are 50ms, and the calibration of the time zero of each parameter is completed.
The foregoing is a more detailed description of the invention in connection with specific preferred embodiments and it is not intended that the invention be limited to these specific details. For those skilled in the art to which the invention pertains, several simple deductions or substitutions can be made without departing from the spirit of the invention, and all shall be considered as belonging to the protection scope of the invention.
Claims (5)
1. A calibration device for time zero of a multi-parameter test system is characterized by comprising the multi-parameter test system, an air source generating device and a time collecting device;
the gas source generating device comprises a gas pressure generator (7), an electromagnetic valve (13), a testing tool (15) and a pressure sensor (8), wherein the gas inlet end of the electromagnetic valve (13) is connected with the gas pressure generator (7), the gas outlet end of the electromagnetic valve (13) is connected with the testing tool (15), and the pressure sensor (8) is connected with the testing tool (15) to measure the pressure of the testing tool (15);
the time acquisition device comprises a multi-channel digital storage oscilloscope (9);
the multi-parameter testing system comprises a computer (1), a signal acquisition card, a program-controlled power supply (2), a direct-current power supply (5), a 5V trigger power supply module (22) and a voltage signal transfer box (4), wherein the signal acquisition card comprises a pressure acquisition card (3), a torque acquisition card (21), a temperature acquisition card (20) and a force value acquisition card (19);
the voltage signal line of the pressure sensor (8) is electrically connected with the input end of the voltage signal switching box (4), the output end of the voltage signal switching box (4) is respectively electrically connected with the input end of the signal acquisition card and the multichannel digital storage oscilloscope (9) so as to transmit the acquired pressure signal and the torque signal, the temperature signal and the force value signal acquired by the test system to the signal acquisition card and the multichannel digital storage oscilloscope (9), the output end of the signal acquisition card is electrically connected with the input end of the computer (1), the computer (1) is electrically connected with the programmable power supply (2), the programmable power supply (2) is respectively electrically connected with the control end of the electromagnetic valve (13) and the multichannel digital storage oscilloscope (9), the computer (1) is electrically connected with the 5V trigger power supply module (22), the 5V trigger power supply module (22) is electrically connected with the multi-channel digital storage oscilloscope (9); the direct current power supply (5) is electrically connected with the pressure sensor (8).
2. The calibrating device for the time zero point of the multiparameter testing system according to claim 1, wherein the gas source generating device further comprises a digital display pressure gauge (6), and the digital display pressure gauge (6) is connected to the gas pressure generator (7) and is used for measuring the pressure of the gas pressure generator (7).
3. The calibrating apparatus for time zero point of multiparameter testing system according to claim 1, wherein the inlet end of said solenoid valve (13) is connected to said gas pressure generator (7) through a test tube (14).
4. A method of calibrating a calibration device according to any one of claims 1 to 3, comprising:
setting the electromagnetic valve (13) to be in a closed state, starting pressure accumulation by the gas pressure generator (7), and displaying the current pressure value by the digital display pressure gauge (6);
the computer (1) sends an ignition instruction to control the output voltage of the program-controlled power supply (2), the electromagnetic valve (13) is triggered to be opened to release the pressure in the gas pressure generator (7), meanwhile, the pressure sensor (8) collects the pressure value in the testing tool (15) and converts the pressure value into a voltage value to be input into the voltage signal adapter box (4), and the testing system transmits the collected torque signal, temperature signal and force value signal to the voltage signal adapter box (4);
the voltage signal adapter box (4) outputs a voltage signal, a torque signal, a temperature signal and a force value signal to the multi-channel digital storage oscilloscope (9), and simultaneously inputs the voltage signal, the torque signal, the temperature signal and the force value signal to the signal acquisition card;
the multi-parameter testing system processes and displays the signal images;
when an ignition instruction is sent out, the computer (1) simultaneously inputs the 27V voltage for triggering the electromagnetic valve (13) and the 5V voltage signal for triggering the valve into the multi-channel digital storage oscilloscope (9), and corrects the time zero point of the 5V voltage signal for triggering the valve by taking the time zero point of the 27V voltage acquired by the multi-channel digital storage oscilloscope (9) as a reference, so that the time zero point of the 5V voltage signal is the same as the time zero point of the 27V voltage;
calibrating the images of all the signals processed and displayed by the multi-parameter testing system by taking the images acquired by the multi-channel digital storage oscilloscope (9) as a standard;
and correcting the time zero point of the voltage signal generated by the voltage sensor and the time zero points of the torque signal, the temperature signal and the force value signal of the multi-parameter testing system by taking the time zero point of the 27V voltage and the standard starting time of the electromagnetic valve (13) as the reference.
5. Calibration method according to claim 1, characterized in that the standard activation time of the solenoid valve (13) is the time from when the programmable power supply (2) sends a voltage signal to when the solenoid valve (13) is activated.
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| CN113465641A (en) * | 2021-06-15 | 2021-10-01 | 五邑大学 | Low-pressure pneumatic delay and duration parameter detection device and method |
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| CN114856830A (en) * | 2022-04-18 | 2022-08-05 | 四川时代巨创科技有限公司 | Intelligent measurement and inspection system in ignition system simulation work test platform |
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