CN111141521A - Electric propulsion high-voltage power supply digital measuring device and method for ground measurement - Google Patents
Electric propulsion high-voltage power supply digital measuring device and method for ground measurement Download PDFInfo
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- CN111141521A CN111141521A CN201911369005.0A CN201911369005A CN111141521A CN 111141521 A CN111141521 A CN 111141521A CN 201911369005 A CN201911369005 A CN 201911369005A CN 111141521 A CN111141521 A CN 111141521A
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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
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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
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R15/00—Details of measuring arrangements of the types provided for in groups G01R17/00 - G01R29/00, G01R33/00 - G01R33/26 or G01R35/00
- G01R15/14—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks
- G01R15/20—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices
- G01R15/202—Adaptations providing voltage or current isolation, e.g. for high-voltage or high-current networks using galvano-magnetic devices, e.g. Hall-effect devices, i.e. measuring a magnetic field via the interaction between a current and a magnetic field, e.g. magneto resistive or Hall effect devices using Hall-effect devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/40—Testing power supplies
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- General Physics & Mathematics (AREA)
- Measurement Of Current Or Voltage (AREA)
Abstract
The digital measuring device and method for the electric propulsion high-voltage power supply for ground measurement can realize low-speed acquisition and analysis of electric parameters of the electric propulsion high-voltage power supply under the steady-state output. The online measurement can be carried out when the ion thruster works. The ion thruster is positioned in the vacuum chamber and normally works, the high-voltage power supply supplies power to the thruster through the high-voltage flange outside the vacuum chamber, the electric propulsion high-voltage power supply digital measuring device is connected between the high-voltage flange outside the chamber and the high-voltage power supply in series, and the electric parameters of the high-voltage power supply are collected in real time during the working period of the thruster. The device can measure parameters of multiple paths of power supplies during working of the thruster simultaneously, and can also carry out specific measurement on different working states of the thruster, wherein the specific measurement comprises low-rate data acquisition and analysis in a normal propulsion mode and trigger high-rate data acquisition in a transition state and a fault state, and the measurement mode is very suitable for measuring output electric parameters of a high-voltage power supply during ground working of the ion thruster.
Description
Technical Field
The invention belongs to the technical field of measurement, and particularly relates to a digital measuring device and method for an electric propulsion high-voltage power supply for ground measurement.
Background
The method has the advantages that the electric parameters of the high-voltage (more than 1000V) power supply when the ion thruster works are accurately obtained, and the method is of great significance for researching the mechanism of the thruster, adjusting the performance of the thruster and improving the design of the thruster and the power supply unit.
The electric propulsion high-voltage power supply has 7 paths of output, 10 paths of electric parameters need to be measured, the maximum rated output voltage is 1500V, the minimum output current is 4mA, the high-precision current measurement is required, and the voltage output measurement of the 1500V high-voltage suspension power supply is required. During the flashover discharge period of the thruster, the maximum transient impact current can reach hundreds of amperes, so that high design requirements are provided for the real-time high-precision acquisition of electric propulsion power supply. The main measurement method at present is to carry out loose connection measurement through a differential probe, a current probe, an oscilloscope and a multimeter, and although various measurements of electric propulsion can be flexibly realized, the automation degree is low, the field safety is poor, the automatic data acquisition and storage realization degree is low, and the method is not enough in the aspect of micro current measurement.
Disclosure of Invention
In view of this, the invention provides a digital measurement device and method for an electric propulsion high-voltage power supply for ground measurement, which can realize low-speed acquisition and analysis under steady-state output of electric parameters of the electric propulsion high-voltage power supply and high-speed data acquisition and storage triggered by transient sudden change, and have the advantages of safe measurement and high data reliability.
In order to achieve the purpose, the invention discloses an electric propulsion high-voltage power supply digital measuring device for ground measurement, wherein a high-voltage power supply is used for supplying power to a thruster, and a vacuum chamber provides a vacuum environment for the working of the thruster;
the differential voltage and current sampling unit is arranged on a high-voltage wire harness of the high-voltage power supply and the high-voltage flange; the signal conditioning unit is used for converting the signal obtained by the differential voltage and current sampling unit, enabling the signal to be within the board card sampling voltage range in the lower computer real-time system and sending the signal to the lower computer real-time system; the lower computer real-time system receives and stores the signal sent by the signal conditioning unit and sends measurement data to the industrial personal computer according to the stored signal; and the industrial personal computer receives the measurement data from the real-time system of the lower computer through the network cable.
The differential voltage and current sampling unit realizes measurement of the floating voltage output by the high-voltage power supply by a voltage differential measurement method.
The differential voltage and current sampling unit represents the current as voltage in a mode of serially connecting resistors at a zero potential end in a current cable in a high-voltage wiring harness, and the voltage is amplified by the signal conditioning unit, so that the current is measured.
And the data acquisition software in the industrial personal computer adopts a trigger design for any channel mutation signal.
The differential voltage sensor of the differential voltage and current sampling unit is connected in a contact mode in the high-voltage wire harness, and the current sensor is sleeved in the high-voltage wire harness in a non-contact mode through Hall induction.
The invention also provides a digital measuring method of the high-voltage power supply, which adopts the digital measuring device of the electric propulsion high-voltage power supply for ground measurement to measure and comprises the following steps:
step 1, installing an ion thruster in a vacuum chamber and connecting a gas path pipeline;
step 2, connecting an industrial personal computer and a lower computer real-time system by using a network cable, and connecting a high-voltage wire harness;
and (4) acquiring and storing the measurement data in real time by using an industrial personal computer, and calculating the specific impulse, the thrust and the power to finish the measurement.
Has the advantages that:
the invention can carry out on-line measurement on the working condition of the ion thruster. The ion thruster is positioned in a vacuum chamber and normally works, a high-voltage power supply (a ground high-voltage power supply set or a satellite-borne power supply processing unit) supplies power to the thruster through a high-voltage flange outside the vacuum chamber, an electric propulsion high-voltage power supply digital measuring device is connected between the high-voltage flange outside the vacuum chamber and the high-voltage power supply in series, and electric parameters of the high-voltage power supply are collected in real time during the working period (including a propulsion mode, a transition state and a fault state) of the thruster. The device can measure parameters of multiple paths of power supplies during working of the thruster simultaneously, and can also carry out specific measurement on different working states of the thruster, wherein the specific measurement comprises low-rate data acquisition and analysis (calculating thrust specific impulse power in real time) in a normal propulsion mode, and triggering high-rate data acquisition in a transition state and a fault state, and the measurement mode is very suitable for measuring output electric parameters of a high-voltage power supply during ground working of the ion thruster.
Drawings
FIG. 1 is a schematic view of the apparatus of the present invention.
The system comprises a 1-differential voltage and current sampling unit, a 2-signal conditioning unit, a 3-lower computer real-time system, a 4-industrial personal computer, a 5-network cable, a 6-high-voltage power supply, a 7-high-voltage wiring harness A, a 9-high-voltage flange, a 10-high-voltage wiring harness B, an 11-thruster and a 12-vacuum cabin.
Detailed Description
The invention is described in detail below by way of example with reference to the accompanying drawings.
As shown in fig. 1, the digital measuring device for the ground-based measurement electric propulsion high-voltage power supply comprises a differential voltage and current sampling unit 1, a signal conditioning unit 2, a lower computer real-time system 3, an industrial personal computer 5 and a network cable 4.
The differential voltage and current sampling unit 1 is arranged on a high-voltage wiring harness A7 of the high-voltage power supply 6 and the high-voltage flange 9, wherein the differential voltage sensor is connected in a high-voltage wiring harness A7 in a contact mode and used for collecting voltage values, and the current sensor is sleeved in the high-voltage wiring harness A7 in a non-contact mode through Hall induction and used for collecting the voltage values. The differential voltage and current sampling unit 1 realizes the measurement of 1500V floating voltage output by the high-voltage power supply 6 safely and accurately by a voltage differential measurement method, and avoids the interference of common ground measurement; the differential voltage and current sampling unit 1 represents the micro current as voltage in a mode that a zero potential end in a 4mA micro current cable in the high-voltage wire harness 7 is connected with a precision resistor in series, and then the voltage is amplified through the signal conditioning unit 2, so that the measurement of the 4mA micro current is realized.
The signal conditioning unit 2 is used for converting the signal obtained by the differential voltage and current sampling unit 1, enabling the signal to be within the board card sampling voltage range of the lower computer real-time system 3, and sending the signal to the lower computer real-time system 3.
And the lower computer real-time system 3 receives and stores the signals sent by the signal conditioning unit 2, and sends measurement data to the industrial personal computer according to the stored signals.
The industrial personal computer 4 receives the measurement data sent by the lower computer real-time system 3 through the network cable 5, so that the distance-unlimited remote data acquisition is realized, and the high sampling rate is ensured, wherein the network cable 5 is used for the lower computer real-time system 3 to transmit the measurement data to the industrial personal computer 4.
The high-voltage power supply 6 is used for supplying power to the thruster 11 through the high-voltage wiring harness a7, the high-voltage wiring harness B10 and the high-voltage flange 9.
The vacuum chamber 12 provides a vacuum environment for thruster operation. Data acquisition software in the industrial personal computer 4 realizes capture and storage of high-speed data of the thruster at the moment of sudden change of the high-voltage power supply electrical parameters through trigger design of a sudden change signal of a certain channel.
The invention also provides a digital measuring method of the high-voltage power supply, which adopts the digital measuring device of the electric propulsion high-voltage power supply for ground measurement to measure and comprises the following steps:
step 1, an ion thruster 11 is arranged in a vacuum chamber 12 and connected with a gas path pipeline.
And 2, connecting the industrial personal computer 4 and the lower computer real-time system 3 by using a network cable 5, and connecting high- voltage wire harnesses 7, 8 and 10.
the industrial personal computer 4 is operated, and the ion thruster 11 starts to work normally;
and the industrial personal computer 4 is used for collecting and storing the measurement data in real time, and calculating the specific impulse, the thrust and the power to finish the measurement.
In summary, the above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the present invention. 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.
Claims (6)
1. A digital measuring device of an electric propulsion high-voltage power supply for ground measurement is disclosed, wherein a high-voltage power supply (6) is used for supplying power to a thruster (11), and a vacuum cabin (12) provides a vacuum environment for the working of the thruster, and is characterized in that the measuring device comprises a differential voltage and current sampling unit (1), a signal conditioning unit (2), a lower computer real-time system (3), an industrial personal computer (4), a network cable (5) and a high-voltage wire harness;
the differential voltage and current sampling unit (1) is arranged on a high-voltage wire harness of a high-voltage power supply (6) and a high-voltage flange (9); the signal conditioning unit (2) is used for converting the signal obtained by the differential voltage and current sampling unit (1), enabling the signal to be within the sampling voltage range of the board card in the lower computer real-time system (3), and sending the signal to the lower computer real-time system (3); the lower computer real-time system (3) receives and stores the signal sent by the signal conditioning unit (2), and sends measurement data to the industrial personal computer (4) according to the stored signal; the industrial personal computer (4) receives the measurement data from the real-time system (3) of the lower computer through the network cable (5).
2. The digital measuring device for the electrically propelled high-voltage power supply for ground measurement as claimed in claim 1, wherein the differential voltage current sampling unit (1) is used for measuring the floating voltage output by the high-voltage power supply (6) by a voltage differential measuring method.
3. The digital measuring device for the electrically propelled high-voltage power supply for the ground measurement as claimed in claim 1, wherein the differential voltage and current sampling unit (1) is used for representing the current as the voltage by serially connecting a resistor at a zero potential end in a current cable in a high-voltage wire harness, and then the voltage is amplified by the signal conditioning unit (2) to realize the measurement of the current.
4. The digital measuring device of the electrically-propelled high-voltage power supply for the ground measurement as claimed in claim 1, characterized in that the data acquisition software in the industrial personal computer (4) adopts a trigger design for any channel mutation signal.
5. The digital measuring device of the electrically propelled high-voltage power supply for ground measurement as claimed in claim 1, wherein the differential voltage sensor of the differential voltage and current sampling unit (1) is connected in contact with the high-voltage wire harness, and the current sensor is sleeved in the high-voltage wire harness in a non-contact way through hall induction.
6. A digital measurement method of a high-voltage power supply, which adopts the digital measurement device of the electrically propelled high-voltage power supply for ground measurement as claimed in any one of claims 1-5 to carry out measurement, and comprises the following steps:
step 1, installing an ion thruster (11) in a vacuum chamber (12) and connecting a gas path pipeline;
step 2, connecting an industrial personal computer (4) and a lower computer real-time system (3) by using a network cable (5) and connecting a high-voltage wire harness;
step 3, vacuumizing the vacuum chamber (12), and starting the industrial personal computer (4) and the lower computer real-time system (3) after the vacuum degree reaches the measuring working condition; operating the industrial personal computer (4), and starting the ion thruster (11) to work normally;
step 4, utilizing the differential voltage and current sampling unit (1) to acquire signals and sending the signals to the signal conditioning unit (2); the signal conditioning unit (2) converts the signal and sends the converted signal to the real-time system 3 of the lower computer; the lower computer real-time system (3) receives and stores the signals sent by the signal conditioning unit (2), and sends measurement data to the industrial personal computer according to the stored signals;
and the industrial personal computer (4) is used for collecting and storing the measurement data in real time, and calculating the specific impulse, the thrust and the power to finish the measurement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911369005.0A CN111141521A (en) | 2019-12-26 | 2019-12-26 | Electric propulsion high-voltage power supply digital measuring device and method for ground measurement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201911369005.0A CN111141521A (en) | 2019-12-26 | 2019-12-26 | Electric propulsion high-voltage power supply digital measuring device and method for ground measurement |
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| CN111141521A true CN111141521A (en) | 2020-05-12 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201911369005.0A Pending CN111141521A (en) | 2019-12-26 | 2019-12-26 | Electric propulsion high-voltage power supply digital measuring device and method for ground measurement |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684256A (en) * | 2020-12-11 | 2021-04-20 | 兰州空间技术物理研究所 | Device and method for testing equivalent complex impedance of discharge chamber of ion thruster |
| CN112985643A (en) * | 2021-02-09 | 2021-06-18 | 兰州空间技术物理研究所 | Single display element multichannel online temperature acquisition system |
| CN112684256B (en) * | 2020-12-11 | 2024-11-15 | 兰州空间技术物理研究所 | Ion thruster discharge chamber equivalent complex impedance testing device and method |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112684256A (en) * | 2020-12-11 | 2021-04-20 | 兰州空间技术物理研究所 | Device and method for testing equivalent complex impedance of discharge chamber of ion thruster |
| CN112684256B (en) * | 2020-12-11 | 2024-11-15 | 兰州空间技术物理研究所 | Ion thruster discharge chamber equivalent complex impedance testing device and method |
| CN112985643A (en) * | 2021-02-09 | 2021-06-18 | 兰州空间技术物理研究所 | Single display element multichannel online temperature acquisition system |
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Application publication date: 20200512 |