CN113295939B - Vacuum pump electromagnetic compatibility test system and control method thereof - Google Patents
Vacuum pump electromagnetic compatibility test system and control method thereof Download PDFInfo
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- CN113295939B CN113295939B CN202110333102.5A CN202110333102A CN113295939B CN 113295939 B CN113295939 B CN 113295939B CN 202110333102 A CN202110333102 A CN 202110333102A CN 113295939 B CN113295939 B CN 113295939B
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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
- G01R31/001—Measuring interference from external sources to, or emission from, the device under test, e.g. EMC, EMI, EMP or ESD testing
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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
- G01R31/005—Testing of electric installations on transport means
- G01R31/006—Testing of electric installations on transport means on road vehicles, e.g. automobiles or trucks
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- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Combustion & Propulsion (AREA)
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- Compressors, Vaccum Pumps And Other Relevant Systems (AREA)
Abstract
The invention discloses an electromagnetic compatibility testing system of an automobile vacuum pump and a control method thereof, belonging to the technical field of electronic electromagnetic compatibility testing of automobiles. The invention provides a vacuum pump electromagnetic compatibility test system and a control method thereof. The problem of the vacuum pump in the electromagnetic emission frequency sweep test process, reach certain atmospheric pressure value and can't continue the test result breakpoint that the work leads to promptly is solved, through barometer real time control atmospheric pressure value in the atmospheric pressure jar, guarantee that the vacuum pump is in operating condition continuously, not because of the atmospheric pressure value automatic shutdown work too high.
Description
Technical Field
The invention discloses an electromagnetic compatibility testing system of an automobile vacuum pump and a control method thereof, and belongs to the technical field of electronic electromagnetic compatibility testing of automobiles.
Background
With the continuous development of automobile electronic and electrical technology, automobiles are used as preferred vehicles for more and more people to go out, and the stability and safety of electronic parts of the automobiles during running have higher and higher requirements. The automobile is driven by the motion of the engine to form a vacuum environment, so that the brake boosting system of the automobile is assisted to provide boosting effect. The brake system is used as the most basic function in the automobile operation safety system, and the parts in the system must be ensured not to cause intolerable interference to other automobile electronic components in the operation process, and meanwhile, the normal and stable function can be ensured when the parts are subjected to electromagnetic interference from other automobile electronic components or the external environment, and the function must be within the error range acceptable by the operation requirement of the automobile brake system. Therefore, the electromagnetic compatibility test of the vacuum pump system is very important, and the running stability of the vacuum pump system can be improved through the electromagnetic compatibility test, so that the running safety of the whole vehicle is improved.
Problems exist with current electromagnetic compatibility testing for vacuum pump systems:
the vacuum pump does not belong to automobile electronic parts working for a long time in actual operation, when the pressure in the vacuum tank reaches a certain value, the vacuum pump stops working, the vacuum pump is a short-time disturbance source part specified in an electromagnetic compatibility test, and the limit value of an electromagnetic emission type project can be properly relaxed in the electromagnetic compatibility test.
In actual tests, working current and voltage of a monitoring vacuum pump are mostly adopted to judge whether the vacuum pump system works normally, when electromagnetic emission tests are carried out, the vacuum pump stops working after reaching a certain air pressure value, the test result of a part of frequency bands is a state that the vacuum pump is powered on but does not work, the test result is discontinuous, and the failure is really the electromagnetic emission energy of the vacuum pump working continuously in different frequency bands.
Disclosure of Invention
The invention aims to solve the problem that a vacuum pump cannot continuously work and further cannot continuously test electromagnetic emission energy in a full frequency band under the working state of the vacuum pump, and provides a vacuum pump electromagnetic compatibility test system and a vacuum pump electromagnetic compatibility test method.
The invention aims to solve the problems by the following technical scheme:
the utility model provides a vacuum pump electromagnetic compatibility test system, includes interconnect's vacuum pump and vacuum tank, vacuum tank links to each other with the cylinder, be provided with the barometer on the cylinder is connected the trachea with vacuum tank, the vacuum pump is connected with the power electricity, vacuum pump, vacuum tank, barometer and power all set up in the darkroom, the cylinder sets up outside the darkroom, be provided with the receiver outside the darkroom, the controller detects vacuum pump operating condition data through setting up at the inside detection antenna in darkroom.
Preferably, the vacuum pump is connected to a power supply via an artificial network.
Preferably, the vacuum pump is disposed on a heat sink.
Preferably, a mechanical ammeter is also included, which is electrically connected to the vacuum pump.
Preferably, still include interior light couple, outer light couple and digital multimeter setting are outside at the darkroom, interior light couple sets up inside the darkroom, digital multimeter, outer light couple and interior light couple are connected with the vacuum pump electricity in proper order.
Preferably, the vacuum pump is electrically connected to a temperature sensor inside the darkroom, and the temperature sensor is electrically connected to a temperature tester outside the darkroom.
Preferably, a blower is arranged outside the darkroom, and the blower blows air into the darkroom through an air blowing pipe to dissipate heat of a motor of the vacuum pump.
A control method of a vacuum pump electromagnetic compatibility test system comprises the following steps:
s1, filling air in the vacuum tank, providing a normal-pressure non-vacuum environment, and recording an air pressure value P0 at the moment;
s2, starting the vacuum pump to begin to pump air out of the vacuum tank to form vacuum assistance, and recording a critical air pressure value at the moment as P1 when the vacuum pump stops working because the air pressure in the vacuum tank reaches a certain value;
s3, opening an air cylinder switch outside the darkroom, adjusting the air pressure value to recover to P0 again, and enabling the vacuum pump to recover to work again;
s4, repeating the steps S1-S3, keeping the air pressure value of the vacuum tank between P0 and P1 by adjusting the air cylinder switch, ensuring that the vacuum pump continuously works, and finishing the working state data of the vacuum pump in a relevant frequency band by the control machine by replacing the receiving frequency of the detection antenna;
and S5, judging whether the vacuum pump electromagnetic experiment is qualified or not according to the vacuum pump working state data.
Preferably, when the control machine is a frequency spectrum receiver, the working state data of the vacuum pump is an electromagnetic emission value of the vacuum pump, and when the electromagnetic emission value of the vacuum pump is lower than a design limit requirement, the electromagnetic emission test of the vacuum pump is qualified.
Preferably, when the control machine is a signal source and a power amplifier, the working state data of the vacuum pump is numerical values of a digital multimeter and a mechanical ammeter, and the numerical values of the digital multimeter and the mechanical ammeter are within an allowable fluctuation range, the vacuum pump electromagnetic immunity test is qualified.
Compared with the prior art, the invention has the following beneficial effects:
the invention provides a vacuum pump electromagnetic compatibility test system and a control method thereof. The problem of the vacuum pump in the electromagnetic emission frequency sweep test process, reach certain atmospheric pressure value and can't continue the test result breakpoint that the work leads to promptly is solved, through barometer real time control atmospheric pressure value in the atmospheric pressure jar, guarantee that the vacuum pump is in operating condition continuously, not because of the atmospheric pressure value automatic shutdown work too high.
Drawings
FIG. 1 is a block diagram of the electrical connections of the present invention.
Detailed Description
The invention is further illustrated below with reference to the accompanying drawing 1:
the technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, it should be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
As shown in fig. 1, a first embodiment of the present invention provides a vacuum pump electromagnetic compatibility testing system based on the prior art, which is characterized by comprising: a vacuum pump, a vacuum tank, a barometer, a power supply, a cylinder, a receiver, and a dark room, and the connection relationship of the above components will be described in detail below.
Vacuum pump, vacuum tank, barometer and power all set up in the darkroom, the cylinder sets up outside the darkroom, and the vacuum pump is fixed on the cooling pad, and the vacuum pump passes through artifical internet access with the power and supplies power to it, vacuum pump and vacuum tank interconnect, and the vacuum tank links to each other with the cylinder, installs the barometer on the trachea of being connected of cylinder and vacuum tank, and the receiver is installed outside the darkroom, and the controller detects vacuum pump operating condition data through installing at the inside detection antenna in darkroom
In order to monitor the working current change of the vacuum pump in real time, the embodiment further comprises a mechanical ammeter which is led out from a power supply line of the vacuum pump and is connected to the current monitoring node by using a divider resistor.
In order to monitor the working voltage change of the vacuum pump in real time, the vacuum pump further comprises an inner thermocouple, an outer thermocouple and a digital multimeter, wherein the outer thermocouple and the digital multimeter are arranged outside the darkroom, and the outer thermocouple realizes the conversion from an optical fiber signal to a voltage signal. The inner optical coupler is arranged inside the darkroom, the voltage signal of the vacuum pump is converted into an optical fiber signal and transmitted to the outside of the darkroom through the inner optical coupler, and the digital multimeter, the outer optical coupler and the inner optical coupler are sequentially and electrically connected with the vacuum pump.
In order to monitor the working temperature change of the vacuum pump in real time, the vacuum pump further comprises a temperature sensor, the vacuum pump is electrically connected with the temperature sensor inside the darkroom, and the temperature sensor is electrically connected with a temperature tester outside the darkroom.
The air blowing pipe is fixed near the motor of the vacuum pump, the blower is arranged outside the darkroom, and the blower blows air into the darkroom through the air blowing pipe to dissipate heat of the motor of the vacuum pump.
A control method of a vacuum pump electromagnetic compatibility test system comprises the following specific contents:
s1, filling air in the vacuum tank, providing a normal-pressure non-vacuum environment, and recording an air pressure value P0 at the moment;
s2, starting the vacuum pump to begin to pump air out of the vacuum tank to form vacuum assistance, and recording a critical air pressure value as P1 when the vacuum pump stops working because the air pressure in the vacuum tank reaches a certain value;
s3, opening an air cylinder switch outside the darkroom, adjusting the air pressure value to recover to P0 again, and enabling the vacuum pump to recover to work again;
s4, repeating the steps S1-S3, keeping the air pressure value of the vacuum tank between P0 and P1 by adjusting the air cylinder switch to ensure that the vacuum pump works continuously, finishing the working state data of the vacuum pump in the relevant frequency band by the control machine by replacing the receiving frequency of the detection antenna,
when the control machine is a frequency spectrum receiver, the working state data of the vacuum pump is the electromagnetic emission value of the vacuum pump, the electromagnetic emission test of the vacuum pump in the relevant frequency band is completed by replacing the receiving antenna with a rod antenna (0.1-30 MHz), a biconical antenna (30-200 MHz), a logarithmic antenna (200-1000 MHz) and a horn antenna (1000-2500 MHz), and the electromagnetic emission test of the vacuum pump is qualified when the electromagnetic emission value of the vacuum pump is lower than the design limit requirement according to the electromagnetic emission value received by the antenna.
In a second embodiment, when the control machine is a signal source and a power amplifier, the working state data of the vacuum pump is the numerical values of a digital multimeter and a mechanical ammeter, so that the air pressure in the vacuum tank is kept between P0 and P1, the vacuum pump is ensured to work continuously, the electromagnetic interference rejection test in the relevant frequency band is completed by replacing a transmitting antenna in the darkroom to be a logarithmic antenna (80-1000 MHz) and a horn antenna (1000-6000 MHz), in the process, the working state performance of the vacuum pump is judged according to the numerical values of the digital multimeter and the mechanical ammeter outside the darkroom, and the electromagnetic interference rejection test of the vacuum pump is qualified within an allowable fluctuation range.
While embodiments of the invention have been disclosed above, it is not intended that they be limited to the applications set forth in the specification and examples. It can be applied to all kinds of fields suitable for the present invention. Additional modifications will readily occur to those skilled in the art. It is therefore intended that the invention not be limited to the exact details and illustrations described and illustrated herein, but fall within the scope of the appended claims and equivalents thereof.
Claims (2)
1. The utility model provides a control method of vacuum pump electromagnetic compatibility test system, is applied to a vacuum pump electromagnetic compatibility test system, includes interconnect's vacuum pump and vacuum jar, the vacuum jar links to each other with the cylinder, be provided with the barometer on the connecting trachea of cylinder with the vacuum jar, the vacuum pump is connected with the power electricity, vacuum pump, vacuum jar, barometer and power all set up in the darkroom, the cylinder sets up outside the darkroom, be provided with the receiver outside the darkroom, the controller detects vacuum pump operating condition data through setting up at the inside detection antenna of darkroom, the vacuum pump passes through artificial network with the power and is connected, the vacuum pump sets up on the heat dissipation pad, and the mechanical ammeter is connected with the vacuum pump electricity, and outer optical coupling and digital multimeter set up outside the darkroom, and interior optical coupling sets up inside the darkroom, digital multimeter, outer optical coupling and interior optical coupling are connected with the vacuum pump electricity according to order in proper order, the vacuum pump is connected with the temperature sensor electricity in the darkroom inside, temperature sensor is connected with the temperature tester electricity outside the darkroom, the darkroom is provided with the darkroom is connected, the darkroom is provided with the air-blower outside, the blower will be divided into the motor heat dissipation of vacuum pump through the trachea through, its characterized in that it lies in that it will blow its characteristics lie in that:
s1, filling air in the vacuum tank, providing a normal-pressure non-vacuum environment, and recording an air pressure value P0 at the moment;
s2, starting the vacuum pump to begin to pump air out of the vacuum tank to form vacuum assistance, and recording a critical air pressure value as P1 when the vacuum pump stops working because the air pressure in the vacuum tank reaches a certain value;
s3, opening an air cylinder switch outside the darkroom, adjusting the air pressure value to recover to P0 again, and enabling the vacuum pump to recover to work again;
s4, repeating the steps S1-S3, keeping the air pressure value of the vacuum tank between P0 and P1 by adjusting the air cylinder switch, ensuring that the vacuum pump works continuously, and finishing the working state data of the vacuum pump in the relevant frequency band by the control machine by replacing the receiving frequency of the detection antenna;
s5, judging whether the vacuum pump electromagnetic experiment is qualified or not according to the vacuum pump working state data:
when the control machine is a frequency spectrum receiver, the working state data of the vacuum pump is the electromagnetic emission value of the vacuum pump, and when the electromagnetic emission value of the vacuum pump is lower than the design limit value requirement, the electromagnetic emission test of the vacuum pump is qualified.
2. The method as claimed in claim 1, wherein when the control machine is a signal source and a power amplifier, the operating status data of the vacuum pump is values of a digital multimeter and a mechanical ammeter, and the values of the digital multimeter and the mechanical ammeter are within an allowable fluctuation range, the electromagnetic immunity test of the vacuum pump is qualified.
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| CN202110333102.5A CN113295939B (en) | 2021-03-29 | 2021-03-29 | Vacuum pump electromagnetic compatibility test system and control method thereof |
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| CN202110333102.5A CN113295939B (en) | 2021-03-29 | 2021-03-29 | Vacuum pump electromagnetic compatibility test system and control method thereof |
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| CN113295939B true CN113295939B (en) | 2023-01-31 |
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