CN110926595A - Electromagnetic valve noise test system of automobile electromechanical-hydraulic composite braking system - Google Patents
Electromagnetic valve noise test system of automobile electromechanical-hydraulic composite braking system Download PDFInfo
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- CN110926595A CN110926595A CN201911186795.9A CN201911186795A CN110926595A CN 110926595 A CN110926595 A CN 110926595A CN 201911186795 A CN201911186795 A CN 201911186795A CN 110926595 A CN110926595 A CN 110926595A
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- 238000012360 testing method Methods 0.000 title claims abstract description 80
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- 239000007788 liquid Substances 0.000 claims description 4
- 238000004891 communication Methods 0.000 claims description 3
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01H—MEASUREMENT OF MECHANICAL VIBRATIONS OR ULTRASONIC, SONIC OR INFRASONIC WAVES
- G01H17/00—Measuring mechanical vibrations or ultrasonic, sonic or infrasonic waves, not provided for in the preceding groups
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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
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Abstract
The invention relates to a noise test system for an electromagnetic valve of an automobile electromechanical-hydraulic composite braking system, which comprises a plurality of sound intensity sensor fixing tools and a control acquisition system, wherein the sound intensity sensor fixing tools are uniformly arranged at positions close to the side wall in an anechoic chamber, and the upper end of each sound intensity sensor fixing tool is provided with a sound intensity sensor facing the middle part of the anechoic chamber; the center of the interior of the anechoic chamber is provided with a solenoid valve fixing tool for fixedly placing a solenoid valve; the control acquisition system comprises a power supply module, a control chip circuit module, an upper computer module and an LMS data acquisition system processing module, wherein the LMS data acquisition system processing module is connected with the plurality of sound intensity sensors, and the control chip circuit module is simultaneously connected with the upper computer module, the power supply module and the electromagnetic valve. The method is simple to operate and high in testing efficiency, can accurately test the working noise of the electromagnetic valve, can effectively reduce errors in the early design process of the electromagnetic valve, and verifies the NVH performance of the electromagnetic valve.
Description
Technical Field
The invention relates to the technical field of electromagnetic valve application measurement, in particular to a noise test system for an electromagnetic valve of an automobile electromechanical-hydraulic composite braking system.
Background
The electromagnetic valve is an industrial device controlled by electromagnetism, is an automatic basic element for controlling fluid, belongs to an actuator, and is not limited to hydraulic pressure and pneumatic pressure. Used in industrial control systems to regulate the direction, flow, velocity and other parameters of a medium. The solenoid valve can be matched with different circuits to realize expected control, and the control precision and flexibility can be ensured. There are many types of solenoid valves, different solenoid valves functioning in different positions of the control system, and solenoid valves also play an important role in vehicle braking.
With the development of new technologies of automobiles, people pay more attention to the NVH performance of automobiles. The noise sources of the automobile integrated electro-hydraulic brake system mainly comprise electromagnetic valve action noise, ball screw action noise, motor action noise and other noises. The electromagnetic valve is a key part of the intelligent brake system, and the noise in the action process of the electromagnetic valve is a key index for evaluating the design quality of the electromagnetic valve. At present, noise test systems for automobile brake systems and noise test systems for hydraulic control units exist in the market, such as chinese patent applications with patent numbers CN201821369542.6 and CN201720840335.3, but there is no noise test system for electromagnetic valves alone, and because the noise of the electromagnetic valves is not obvious, it is a difficult problem how to accurately test the noise of the electromagnetic valves, and therefore a test system for testing the noise of the electromagnetic valves needs to be designed so as to improve the NVH performance of the electromagnetic valves in time in the early stage design process of the electromagnetic valves.
Disclosure of Invention
The invention aims to solve the technical problem of providing a noise test system for the electromagnetic valve of the automobile electromechanical-hydraulic composite brake system, which is simple to operate and high in test efficiency, can accurately test the working noise of the electromagnetic valve, can effectively reduce errors in the early design process of the electromagnetic valve, and can verify the NVH performance of the electromagnetic valve.
The technical scheme adopted by the invention for solving the technical problems is as follows: the noise testing system comprises a plurality of sound intensity sensor fixing tools and a control acquisition system, wherein the sound intensity sensor fixing tools are uniformly arranged at positions close to the side wall in an anechoic chamber, and the upper end of each sound intensity sensor fixing tool is provided with a sound intensity sensor facing the middle part of the anechoic chamber;
the center of the interior of the anechoic chamber is provided with an electromagnetic valve fixing tool for fixedly placing an electromagnetic valve;
the control acquisition system comprises a power supply module, a control chip circuit module, an upper computer module and a LMS data acquisition system processing module, wherein the LMS data acquisition system processing module is connected with the plurality of sound intensity sensors, and the control chip circuit module is simultaneously connected with the upper computer module, the power supply module and an electromagnetic valve in the electromagnetic valve fixing tool.
Further, the fixed frock of sound intensity sensor include disc seat, the vertical connection montant of arranging in disc seat upper end, the upper end of connecting the montant rotate and be connected with horizontal pole montant connecting block, the one end of horizontal pole montant connecting block link to each other with connecting the horizontal pole, the connection horizontal pole on portable be provided with sound intensity sensor centre gripping frock.
Furthermore, the bottom of the disc seat is provided with a circular groove, and the top of the disc seat is provided with a threaded connecting column in the middle.
Furthermore, one end of the connecting vertical rod is provided with a threaded connecting hole matched with the threaded connecting column, and the other end of the connecting vertical rod is provided with a connecting plate which axially extends and is provided with a round hole.
Furthermore, one end of each transverse rod and vertical rod connecting block is provided with two square connecting blocks with round holes, each square connecting block is connected with the connecting plate, and the other end of each square connecting block is provided with a threaded rod connected with the connecting transverse rod.
Furthermore, the clamping tool for the sound intensity sensor is a double-ring clamping structure formed by butt joint of two clamping pieces with semicircular concave parts, two ends of the clamping tool are connected through screws, one ring is clamped, and the other ring is clamped with the sound intensity sensor.
Further, the solenoid valve fixing tool comprises a solenoid valve fixing base and a solenoid valve pressing cover arranged at the upper end of the solenoid valve fixing base, the solenoid valve fixing base is used for placing a solenoid valve, and the solenoid valve pressing cover presses the solenoid valve.
Furthermore, the control chip circuit module comprises a voltage stabilizing and converting module, a communication logic processing unit, a power control unit, a motor control loop and an electromagnetic valve control loop.
Furthermore, the upper computer module is an electromagnetic valve testing system compiled based on Labview software and comprises a normally-closed valve testing module, a normally-opened valve testing module, a pressure increasing valve testing module and a pressure reducing valve testing module.
Has the advantages that: the invention relates to a noise test system for an electromagnetic valve of an automobile electromechanical liquid composite braking system, which has a reasonable structure, tests in an anechoic chamber, tests the electromagnetic valve through a plurality of sound intensity sensors, is very convenient to adjust and install, can test various electromagnetic valves, is simple to operate, has high test efficiency, can accurately test the working noise of the electromagnetic valve, can effectively reduce errors in the early design process of the electromagnetic valve, and verifies the NVH performance of the electromagnetic valve.
Drawings
FIG. 1 is a schematic diagram of the solenoid valve noise level test of the present invention;
FIG. 2 is a diagram of a fixture for fixing an acoustic intensity sensor of a noise testing system of an electromagnetic valve according to the present invention;
FIG. 3 is a diagram of a solenoid valve fixing tool of the solenoid valve noise testing system of the present invention;
FIG. 4 is a disk seat diagram of the solenoid valve noise testing system of the present invention;
FIG. 5 is a diagram of a connecting vertical rod of the noise testing system of the solenoid valve of the present invention;
FIG. 6 is a block diagram of the solenoid valve noise test system of the present invention;
FIG. 7 is a pin diagram of a circuit module of a control chip of the solenoid valve noise testing system according to the present invention.
The figure is as follows: 1. fixing a tool for the electromagnetic valve; 2. fixing a tool for the sound intensity sensor; 3. an anechoic chamber; 4. a control chip circuit module; 5. a power supply module; 6. an upper computer module; 7. the LMS data acquisition system processing module; 101. the electromagnetic valve is fixed on the base; 102. the electromagnetic valve is pressed and covered; 201. a disc base; 202. connecting the vertical rods; 203. clamping a tool by using the sound intensity sensor; 204. connecting the cross bars; 205. a cross bar and vertical bar connecting block; 206. a sound intensity sensor; 201a, a circular groove; 201b, a threaded connecting column; 202a, a threaded connection hole; 202b, a connecting plate; 205a, a square connecting block; 205b, threaded rod.
Detailed Description
The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.
As shown in fig. 1-7, an embodiment of the present invention relates to a noise testing system for an electromagnetic valve of an automotive electromechanical-hydraulic composite brake system, which includes a plurality of fixed tools 2 for acoustic intensity sensors and a control acquisition system, wherein the fixed tools 2 for acoustic intensity sensors are uniformly arranged inside an anechoic chamber 3 at a position close to a side wall, and the upper end of the fixed tools 2 for acoustic intensity sensors is provided with an acoustic intensity sensor 206 facing the middle of the anechoic chamber 3;
the center of the interior of the anechoic chamber 3 is provided with an electromagnetic valve fixing tool 1 for fixedly placing an electromagnetic valve;
the three fixed tools 2 of the sound intensity sensor are arranged at three points and are arranged on the edge of a circle with a specified radius in the anechoic chamber 3, the fixed tool 1 of the electromagnetic valve is arranged on the center of the circle, and the probe of the sound intensity sensor 206 points to the center of the circle, so that the three sound intensity sensors 206 can uniformly test the noise of the electromagnet in the fixed tool 1 of the electromagnetic valve.
The control acquisition system comprises a power supply module 5, a control chip circuit module 4, an upper computer module 6 and an LMS data acquisition system processing module 7, wherein the LMS data acquisition system processing module 7 is connected with the plurality of sound intensity sensors 206, and the control chip circuit module 4 is simultaneously connected with the upper computer module 6, the power supply module 5 and the electromagnetic valve in the electromagnetic valve fixing tool 1.
The power supply module 5 is used for supplying power to the control chip circuit module 4, the control chip circuit module 4 is used for storing and executing control instructions, the LMS data acquisition system processing module 7 is used for acquiring signals of the sound intensity sensor and processing experimental data, and the control chip circuit module 4 is used for processing control instructions and execution programs of the electromagnetic valve.
Fixed frock 2 of acoustic intensity sensor include disc seat 201, vertically arrange the connection montant 202 in disc seat 201 upper end, the upper end of connecting montant 202 rotate and be connected with horizontal pole montant connecting block 205, the one end of horizontal pole montant connecting block 205 link to each other with connecting horizontal pole 204, connecting horizontal pole 204 on portable acoustic intensity sensor centre gripping frock 203 that is provided with, connecting horizontal pole 204 can rotate round the upper end of connecting montant 202 through horizontal pole montant connecting block 205 to the adjustment position, acoustic intensity sensor centre gripping frock 203 also can move on connecting horizontal pole 204, the adjustment position.
The utility model discloses a quick detachable connection rod of a vertical rod, including disc seat 201, connecting montant 205, square connecting block 205a and connecting plate 202b, the other end be the threaded rod 205b that links to each other with connecting horizontal rod 204, disc seat 201 bottom have circular recess 201a, disc seat 201's top be provided with threaded connection post 201b between two, the one end of connecting montant 202 be provided with the threaded connection hole 202a that matches with threaded connection post 201b, the other end has arranged the connecting plate 202b that has the round hole that the axial is stretched out, the one end of horizontal rod montant connecting block 205 be two square connecting block 205a that has the round hole, square connecting block 205a link.
The utility model discloses a sound intensity sensor clamping tool, including sound intensity sensor clamping tool 203, two clamping pieces that have semicircular concave part butt joint and constitute are two circle type clamping structure, the screw connection is passed through at both ends, a circle is tight, another circle presss from both sides tight sound intensity sensor 206, the installation elasticity of sound intensity sensor clamping tool 203 and the tight fixing of clamp of sound intensity sensor 206 can be realized through the screw that rotates both ends, the rotation of sound intensity sensor clamping tool 203 can make sound intensity sensor 206 adjust at an annular within range.
The electromagnetic valve fixing tool 1 comprises an electromagnetic valve fixing base 101 and an electromagnetic valve pressing cover 102 arranged at the upper end of the electromagnetic valve fixing base 101, the electromagnetic valve fixing base 101 is used for placing an electromagnetic valve, and the electromagnetic valve pressing cover 102 presses the electromagnetic valve, so that the inertia effect of the electromagnetic valve in the action process can be reduced.
The control chip circuit module 4 comprises a voltage stabilizing and converting module, a communication logic processing unit, a power control unit, a motor control loop and an electromagnetic valve control loop.
The upper computer module 6 is an electromagnetic valve testing system compiled based on Labview software and used for sending control instructions and comprises a normally-closed valve testing module, a normally-opened valve testing module, a pressure increasing valve testing module and a pressure reducing valve testing module, wherein the upper computer module 6 is provided with a display, and modules and set parameters can be selected on the display.
In the first embodiment, the noise amount of the pressure regulating process of the power-on time and the pressure maintaining time is given to the test pressure increasing valve in the no-load state, the sound intensity sensor fixing tool 2 is arranged in the anechoic chamber 3 at three points, and the electromagnetic valve fixing tool 1 is placed in the center of a test circle. And a control acquisition system is built, a power supply module 5 is turned on, and an LMS data acquisition processing system 7 is turned on. The electromagnetic valve testing system software compiled by the Labview software on the upper computer module 6 is opened, a pressure increasing valve testing window is opened, setting parameters such as pressure increasing valve control of the pressure increasing valve, pressure increasing valve control start, pressure increasing valve first-stage pressure maintaining time, pressure increasing valve second-stage pressure maintaining time, pressure increasing valve pressure maintaining time and pressure increasing valve pressure maintaining step frequency are input, a sending button is clicked, the electromagnetic valve acts according to a control instruction, and after a certain time of testing, the LMS data acquisition and processing system 7 stores the data acquired by the sound intensity sensor 206.
In the second embodiment, the noise amount of the pressure regulating process of the power-on time and the pressure maintaining time is given to the test pressure reducing valve in the no-load state, the fixed tool 2 of the sound intensity sensor is arranged in the anechoic chamber 3 by three points, and the fixed tool 1 of the electromagnetic valve is placed in the center of a test circle. And a control acquisition system is built, a power supply 5 is turned on, and an LMS data acquisition processing system 7 is turned on. The method comprises the steps of opening solenoid valve testing system software compiled by Labview software on an upper computer module 6, opening a pressure reducing valve testing window, inputting setting parameters of pressure reducing valve control, pressure reducing valve control start, pressure maintaining time of a first stage of the pressure reducing valve, pressure maintaining time of a second stage of the pressure reducing valve, pressure reducing time, pressure maintaining time of the pressure reducing valve, pressure maintaining step times of the pressure reducing valve and the like of the pressure reducing valve, clicking a sending button, enabling the solenoid valve to act according to a control instruction, and storing data acquired by a sound intensity sensor 206 by an LMS data acquisition and processing system 7 after testing for a certain time.
In the third embodiment, after the test normally-closed valve gives the opening duty ratio when in no-load, the noise amount of the upper electricity and the lower electricity of the holding current is given, the sound intensity sensor fixing tool 2 is arranged in the anechoic chamber 3 by adopting three points, and the electromagnetic valve fixing tool 1 is placed in the center of a test circle. And a control acquisition system is built, a power supply 5 is turned on, and an LMS data acquisition processing system 7 is turned on. Opening the electromagnetic valve testing system software compiled by Labview software on the upper computer module 6, opening a normally closed valve testing window, inputting the setting parameters of normally closed valve control, normally closed valve control start, normally closed valve first-stage opening duty ratio, normally closed valve first-stage opening time, normally closed valve second-stage opening current, normally closed valve second-stage power-on time and the like of a normally closed valve, clicking a sending button, enabling the electromagnetic valve to act according to a control instruction, and after testing for a certain time, storing the data acquired by the sound intensity sensor 206 by the LMS data acquisition and processing system 7.
In the fourth embodiment, after the test normally open valve gives the opening current when no load, the noise amount of the upper and lower electricity of the maintaining current is given, the sound intensity sensor fixing tool 2 is arranged in the anechoic chamber 3 by adopting three points, and the electromagnetic valve fixing tool 1 is placed in the center of the test circle. And a control acquisition system is built, a power supply 5 is turned on, and an LMS data acquisition processing system 7 is turned on. Opening the electromagnetic valve testing system software compiled by Labview software, opening a normally-closed valve testing window, inputting the setting parameters of normally-open valve control of a normally-open valve, starting of the normally-open valve control, opening current of a first stage of the normally-open valve, opening time of a first stage of the normally-open valve, opening current of a second stage of the normally-open valve, power-on time of a second stage of the normally-open valve and the like, clicking a sending button, enabling the electromagnetic valve to act according to a control instruction, and storing data collected by the sound intensity sensor 206 by the LMS data collecting and processing system 7 after testing for a certain time.
The invention has reasonable structure, tests in the anechoic chamber and tests the electromagnetic valve through a plurality of sound intensity sensors, the sound intensity sensors are very convenient to adjust and install, can test various electromagnetic valves, have simple operation and high test efficiency, can accurately test the working noise of the electromagnetic valve, can effectively reduce errors in the early design process of the electromagnetic valve and verify the NVH performance of the electromagnetic valve.
Claims (9)
1. The utility model provides an electromechanical liquid composite brake system solenoid valve noise test system of car, includes fixed frock of sound intensity sensor (2) and control collection system, its characterized in that:
the acoustic intensity sensor fixing tools (2) are uniformly arranged at positions close to the side walls in the anechoic chamber (3), and the upper end of each acoustic intensity sensor fixing tool (2) is provided with an acoustic intensity sensor (206) facing the middle of the anechoic chamber (3);
the center of the interior of the anechoic chamber (3) is provided with an electromagnetic valve fixing tool (1) for fixedly placing an electromagnetic valve;
the control acquisition system comprises a power supply module (5), a control chip circuit module (4), an upper computer module (6) and an LMS data acquisition system processing module (7), wherein the LMS data acquisition system processing module (7) is connected with a plurality of sound intensity sensors (206), and the control chip circuit module (4) is simultaneously connected with the upper computer module (6), the power supply module (5) and an electromagnetic valve in the electromagnetic valve fixing tool (1).
2. The electromagnetic valve noise testing system of the automobile electromechanical hydraulic compound braking system according to claim 1, characterized in that: fixed frock of sound intensity sensor (2) include disc seat (201), vertically arrange connection montant (202) in disc seat (201) upper end, the upper end of connecting montant (202) rotate and be connected with horizontal pole montant connecting block (205), the one end of horizontal pole montant connecting block (205) link to each other with connecting horizontal pole (204), connecting horizontal pole (204) on portable be provided with sound intensity sensor centre gripping frock (203).
3. The electromagnetic valve noise testing system of the automobile electromechanical hydraulic compound braking system according to claim 2, characterized in that: the round disc seat is characterized in that a round groove (201a) is formed in the bottom of the disc seat (201), and a threaded connecting column (201b) is arranged in the middle of the top of the disc seat (201).
4. The automobile electromechanical liquid composite brake system electromagnetic valve noise test system according to claim 3, characterized in that: one end of the connecting vertical rod (202) is provided with a threaded connecting hole (202a) matched with the threaded connecting column (201b), and the other end of the connecting vertical rod is provided with a connecting plate (202b) which axially extends and is provided with a round hole.
5. The automobile electromechanical liquid composite brake system electromagnetic valve noise test system according to claim 4, characterized in that: one end of each cross rod and vertical rod connecting block (205) is provided with two square connecting blocks (205a) with round holes, each square connecting block (205a) is connected with the connecting plate (202b), and the other end of each square connecting block is provided with a threaded rod (205b) connected with the connecting cross rod (204).
6. The electromagnetic valve noise testing system of the automobile electromechanical hydraulic compound braking system according to claim 1, characterized in that: the clamping tool (203) for the sound intensity sensor is a double-ring type clamping structure formed by butt joint of two clamping pieces with semicircular concave parts, two ends of the clamping structure are connected through screws, one ring is clamped, and the other ring is clamped with the sound intensity sensor (206).
7. The electromagnetic valve noise testing system of the automobile electromechanical hydraulic compound braking system according to claim 1, characterized in that: the electromagnetic valve fixing tool (1) comprises an electromagnetic valve fixing base (101) and an electromagnetic valve pressing cover (102) arranged at the upper end of the electromagnetic valve fixing base (101), the electromagnetic valve fixing base (101) is used for placing an electromagnetic valve, and the electromagnetic valve pressing cover (102) presses the electromagnetic valve.
8. The electromagnetic valve noise testing system of the automobile electromechanical hydraulic compound braking system according to claim 1, characterized in that: the control chip circuit module (4) comprises a voltage stabilizing conversion module, a communication logic processing unit, a power control unit, a motor control loop and an electromagnetic valve control loop.
9. The electromagnetic valve noise testing system of the automobile electromechanical hydraulic compound braking system according to claim 1, characterized in that: the upper computer module (6) is an electromagnetic valve testing system compiled based on Labview software and comprises a normally-closed valve testing module, a normally-opened valve testing module, a pressure increasing valve testing module and a pressure reducing valve testing module.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201911186795.9A CN110926595A (en) | 2019-11-28 | 2019-11-28 | Electromagnetic valve noise test system of automobile electromechanical-hydraulic composite braking system |
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| CN201911186795.9A CN110926595A (en) | 2019-11-28 | 2019-11-28 | Electromagnetic valve noise test system of automobile electromechanical-hydraulic composite braking system |
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