CN115077812A - Electric vehicle controller seals detecting system - Google Patents
Electric vehicle controller seals detecting system Download PDFInfo
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- CN115077812A CN115077812A CN202210772463.4A CN202210772463A CN115077812A CN 115077812 A CN115077812 A CN 115077812A CN 202210772463 A CN202210772463 A CN 202210772463A CN 115077812 A CN115077812 A CN 115077812A
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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
- G01M3/00—Investigating fluid-tightness of structures
- G01M3/02—Investigating fluid-tightness of structures by using fluid or vacuum
- G01M3/26—Investigating fluid-tightness of structures by using fluid or vacuum by measuring rate of loss or gain of fluid, e.g. by pressure-responsive devices, by flow detectors
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Abstract
The invention discloses a sealing detection system of an electric vehicle controller, which specifically comprises a gas circuit system and a control interaction system; the gas circuit system consists of a quick-connection type electric input interface, an integrated control box and a sealing box, and the control interaction system consists of an interaction panel and a warning lamp; the detection principle is that automatic detection of the controller with smaller pressure bearing capacity is completed by comparing pressure change values in the controller in real time; the specific operation method is that only a start button and an emergency stop button are arranged on an interactive panel, automatic detection of the sealing performance of the controller is realized through a preset program, and finally test data are stored and a detection result is displayed through an indicator light; the invention utilizes the automatic control function of the electric proportional valve and the gas flow controller to control the inflation pressure and the inflation speed, realizes the stable and controllable inflation and deflation process, has low requirement on operators and accurate test result, and is suitable for the detection of the controller with smaller pressure bearing capacity.
Description
The technical field is as follows:
the invention relates to the field of electric vehicle controller tightness detection, and mainly relates to an electric vehicle controller tightness detection system.
Background art:
along with the implementation of low-carbon travel policies advocated by the state and the current situation of traffic jam caused by urbanization development, more and more people select electric vehicles to travel, and the purpose of rapid traffic is achieved. The manufacturing quality of the electric vehicle directly influences the traveling safety of people, the controller of the electric vehicle is a core problem in the production process of the electric vehicle, the sealing performance detection is used as an important link of the controller performance detection, the controller has an extremely important effect on the aspect of guaranteeing the product quality, and for the controller with the sealing performance requirement, if the sealing performance of the product does not meet the design requirement in the actual detection process, the reliability and the safety of the product are directly influenced. The direct-pressure method detection is simple, convenient and easy to implement, has good economical efficiency, and is widely applied to container sealing performance detection devices, but the currently adopted direct-pressure method detection device usually adopts a single stop valve or an electric proportional valve to control the inflation and deflation processes, and the final inflation pressure of a low-pressure-resistant product with a high inflation pressure requirement is difficult to guarantee, and the inflation safety is poor. The invention provides a sealing detection system of an electric vehicle controller, which adopts a gas path control structure in which an electric proportional valve and a gas flow controller are connected in series, designs a set of automatic sealing performance detection device, realizes one-key detection of the sealing performance of a low-pressure-resistant cylinder, and effectively improves the detection efficiency and the safety.
The invention content is as follows:
the invention aims to make up the defects of the prior art, and provides a sealing detection system for an electric vehicle controller.
The invention is realized by the following technical scheme:
a sealing detection system of an electric vehicle controller specifically comprises a gas circuit system and a control interaction system; the gas circuit system consists of a quick-connection type electric input interface, an integrated control box and a seal box, and the control interaction system consists of an interaction panel and a warning lamp; the detection principle is that automatic detection of the controller with smaller pressure bearing capacity is completed by comparing pressure change values in the controller in real time; the specific operation method is that only a start button and an emergency stop button are arranged on an interactive panel, automatic detection of the sealing performance of the controller is realized through a preset program, and finally test data are stored and a detection result is displayed through a warning lamp;
preferably, whole gas circuit system comprises formula electrical input interface, integrated form control box, seal box soon, and the system gas circuit mainly divide into two parts: the detection gas circuit and the execution gas circuit are specifically composed of a quick connector (connected with a workshop gas source), an air filter, a pressure reducing valve, an electric proportional valve, a gas flow controller, an electromagnetic control valve, an execution cylinder, a gas pressure sensor and the like;
preferably, the control interaction system consists of an interaction panel and a warning lamp, wherein the interaction panel specifically consists of an embedded touch control screen (TPC1162Hi), a PLC (CP1E-N40DR-D), a sensor, an electromagnetic valve, a gas flow controller, an electric proportional valve (pressure) and input and output equipment; the embedded touch control screen is used as an upper computer to realize man-machine interaction equipment and main control equipment, the RS232/RS485 is respectively connected with the gas flow controller, the pressure type electric proportional valve and the PLC, and the PLC realizes signal acquisition and control of the sensor, the button, the indicator lamp and the electromagnetic valve and realizes the detection operation of the sealing performance of the controller;
preferably, the sealing detection device of the electric vehicle controller is characterized in that gas is purified and pressure-regulated, then the gas is directly filled into a measured controller, a pressure source is disconnected when the pressure of the measured controller reaches a set pressure, the variation of the internal pressure of the measured controller along with time is started after the internal pressure of a container is stabilized after pressure maintaining, then the gas leakage amount in unit time is calculated according to the function relation of the pressure value and the leakage amount, and the sealing performance of the measured controller is judged by comparing the variation with an allowable value required by a product process, wherein the test comprises four stages of a constant-flow constant-speed inflation period, a constant-pressure inflation period, a pressure maintaining test period and an exhaust period;
preferably, in the constant-flow constant-speed inflation period, the electric proportional valve (pressure) keeps the maximum opening, and the gas flow controller controls the inflation flow in real time to complete the constant-flow constant-speed inflation period at the uniform inflation flow; in the constant-pressure inflation period, when the pressure in the measured controller body is close to the test initial pressure, the electric proportional valve (pressure) adjusts the outlet pressure to the cylinder body detection initial pressure required by the process according to pressure feedback, and the gas flow controller keeps the maximum opening degree, so that the final inflation pressure in the measured controller body can be ensured to safely reach the detection initial pressure required by the process; in the pressure maintaining test period, after the constant pressure inflation period is finished, closing the stop valve K1, and beginning to meter and read the change value of the air pressure in the measured controller along with the time; if the product has a leakage point, the air pressure in the measured controller is continuously reduced, after the judgment time is reached, the gas leakage is calculated through a leakage calculation model and is compared with the design index, and finally the qualification of the product is judged; in the exhaust period, after the test is finished, the gas in the tested controller is exhausted by opening the stop valve K2, and the tested controller is taken out to finish the detection process;
preferably, the leakage calculation model is inversely proportional to V, P when n and T are constant, and the function relation between the pressure value and the leakage is:
P 1 *V＝P 2 *V+P 0 *V leakage
In the formula: p 1 The initial pressure of the measured controller is MPa; p 2 The pressure is the pressure of the tested controller in the test, MPa; p 0 Is the ambient air pressure, MPa; v leak is the volume of gas leaked into the environment, L; v is the equivalent volume inside the measured controller, L; m is the gas leakage per unit time, L/s; t is the detection interval time, s.
The invention has the advantages that:
1. the device and the detection method can realize the controllability of the processes of inflation, pressure maintaining and exhaust of the sealed cavity, greatly improve the detection efficiency of the sealing performance of the controller and simultaneously ensure the safety and the reliability of the detection process of the sealing performance of the controller;
2. the device and the detection method are used for detecting the sealing performance of the controller with smaller pressure bearing capacity, the testing air pressure and the inflating flow can be strictly controlled, and the irreversible damage of the sealing cylinder body caused by overlarge pressure and flow is avoided;
3. for batch detection work, detection parameters are often solidified, and excessive operation functions and keys reduce the detection performance of equipment.
Description of the drawings:
FIG. 1: the overall structure schematic diagram of the sealing detection device of the electric vehicle controller;
FIG. 2: a system gas path schematic diagram;
FIG. 3: a schematic test flow diagram of the automatic detection device for the sealing performance of the cylinder body;
FIG. 4: and (4) a hardware system schematic diagram.
In the figure: 1 seal box, 2 connect formula electrical input interface soon, 3 by controller, 4 integrated form control box, 5 control interactive system, 6 warning lights.
The specific implementation mode is as follows:
a sealing detection system of an electric vehicle controller specifically comprises a gas circuit system and a control interaction system; the gas circuit system consists of a quick-connection type electric input interface 2, an integrated control box 4 and a seal box 1, and the control interaction system 5 consists of an interaction panel and a warning lamp 6; the detection principle is that automatic detection of the controller with smaller pressure bearing capacity is completed by comparing pressure change values in the controller in real time; the specific operation method comprises the steps that only a starting button and an emergency stop button are arranged on an interactive panel, automatic detection of the sealing performance of the controller is achieved through a preset program, finally, test data are stored, and a detection result is displayed through a warning light;
the specific implementation mode is as follows:
1. whole gas circuit system comprises quick-connect electrical input interface 2, integrated form control box 4, seal box 1, and the system gas circuit mainly divide into two parts: the detection gas circuit and the execution gas circuit are specifically composed of a quick connector (connected with a workshop gas source), an air filter, a pressure reducing valve, an electric proportional valve, a gas flow controller, an electromagnetic control valve, an execution cylinder, a gas pressure sensor and the like;
2. the control interaction system 5 comprises an interaction panel and a warning lamp, wherein the interaction panel specifically comprises an embedded touch control screen (TPC1162Hi), a PLC (CP1E-N40DR-D), a sensor, an electromagnetic valve, a gas flow controller, an electric proportional valve (pressure) and input and output equipment; the embedded touch control screen is used as an upper computer to realize man-machine interaction equipment and main control equipment, the RS232/RS485 is respectively connected with the gas flow controller, the pressure type electric proportional valve and the PLC, and the PLC realizes signal acquisition and control of the sensor, the button, the indicator lamp and the electromagnetic valve and realizes the detection operation of the sealing performance of the controller;
3. a detection method of a sealing detection device of an electric vehicle controller comprises the steps of directly filling gas into a measured controller after the gas is purified and pressure regulated, disconnecting a pressure source when the pressure of the measured controller reaches a set pressure, starting the variation of the internal pressure of the measured controller along with time after the internal pressure of a container is stabilized after pressure maintaining, calculating the gas leakage amount in unit time according to the function relation of the pressure value and the leakage amount, and comparing the gas leakage amount with an allowable value required by a product process to judge the sealing performance of the measured controller, wherein the test comprises four stages of a constant-flow constant-speed inflation period, a constant-pressure inflation period, a pressure maintaining test period and an exhaust period;
4. in the constant flow and uniform speed inflation period, the electric proportional valve (pressure) keeps the maximum opening, and the gas flow controller controls the inflation flow in real time to complete the constant flow and uniform speed inflation period with uniform inflation flow; in the constant-pressure inflation period, when the pressure in the measured controller body is close to the test initial pressure, the electric proportional valve (pressure) adjusts the outlet pressure to the cylinder body detection initial pressure required by the process according to pressure feedback, and the gas flow controller keeps the maximum opening degree, so that the final inflation pressure in the measured controller body can be ensured to safely reach the detection initial pressure required by the process; in the pressure maintaining test period, after the constant pressure inflation period is finished, closing the stop valve K1, and beginning to meter and read the change value of the air pressure in the measured controller along with the time; if the product has a leakage point, the air pressure in the measured controller is continuously reduced, after the judgment time is reached, the gas leakage is calculated through a leakage calculation model and is compared with the design index, and finally the qualification of the product is judged; in the exhaust period, after the test is finished, the gas in the tested controller is exhausted by opening the stop valve K2, and the tested controller is taken out to finish the detection process;
the leakage calculation model is that when n and T are fixed, V, P is in inverse proportion, and the functional relation between the pressure value and the leakage is as follows:
P 1 *V＝P 2 *V+P 0 *V leakage
In the formula: p 1 The initial pressure of the measured controller is MPa; p 2 The pressure is the pressure of the measured controller during testing, MPa; p 0 Is ambient air pressure, MPa; v leak is the volume of gas leaked into the environment, L; v is the equivalent volume inside the measured controller, L; m is gas leakage per unit time, L/s; t is the detection interval time, s.
Claims (6)
1. A sealing detection system of an electric vehicle controller is specifically characterized by comprising a gas circuit system and a control interaction system; the gas circuit system consists of a quick-connection type electric input interface, an integrated control box and a sealing box, and the control interaction system consists of an interaction panel and a warning lamp; the detection principle is that automatic detection of the controller with smaller pressure bearing capacity is completed by comparing pressure change values in the controller in real time; the specific operation method comprises the steps that only a starting button and an emergency stop button are arranged on the interactive panel, automatic detection of the sealing performance of the controller is achieved through a preset program, finally, test data are stored, and a detection result is displayed through a warning lamp.
2. The electric vehicle controller sealing detection system according to claim 1, wherein the whole gas circuit system is characterized by consisting of a quick-connection type electrical input interface, an integrated control box and a sealing box, and the gas circuit of the system is mainly divided into two parts: the detection gas circuit and the execution gas circuit are specifically composed of a quick connector (connected with a workshop gas source), an air filter, a pressure reducing valve, an electric proportional valve, a gas flow controller, an electromagnetic control valve, an execution cylinder, a gas pressure sensor and the like.
3. The electric vehicle controller sealing detection system according to claim 1, wherein the control interaction system is characterized by comprising an interaction panel and a warning light, wherein the interaction panel is specifically composed of an embedded touch control screen (TPC1162Hi), a PLC (CP1E-N40DR-D), a sensor, an electromagnetic valve, a gas flow controller, an electric proportional valve (pressure) and an input/output device; the embedded touch control screen is used as an upper computer to realize man-machine interaction equipment and main control equipment, the RS232/RS485 is respectively connected with the gas flow controller, the pressure type electric proportional valve and the PLC, and the PLC realizes signal acquisition and control of the sensor, the button, the indicator lamp and the electromagnetic valve to realize the detection operation of the sealing performance of the controller.
4. The electric vehicle controller sealing detection system according to claim 1, wherein the detection is characterized in that the gas is purified, the pressure is adjusted, and then the gas is directly filled into the measured controller, the pressure source is disconnected when the pressure of the measured controller reaches the set pressure, the variation of the internal pressure of the measured controller along with time is started after the internal pressure of the container is stabilized after the pressure is maintained, then the gas leakage rate in unit time is calculated according to the function relationship between the pressure value and the leakage rate, and the sealing performance of the measured controller is determined by comparing the gas leakage rate with an allowable value required by a product process, wherein the test is divided into four stages, namely a constant-flow constant-speed inflation period, a constant-pressure inflation period, a pressure-maintaining test period and an exhaust period.
5. The four stages of the constant-flow constant-speed inflation period, the constant-pressure inflation period, the pressure-maintaining test period and the exhaust period according to claim 4 are specifically characterized in that in the constant-flow constant-speed inflation period, the electrical proportional valve (pressure) keeps the maximum opening degree, the gas flow controller controls the inflation flow in real time, and the constant-flow constant-speed inflation period is completed with the uniform inflation flow; in the constant-pressure inflation period, when the pressure in the measured controller body is close to the test initial pressure, the electric proportional valve (pressure) adjusts the outlet pressure to the cylinder body detection initial pressure required by the process according to pressure feedback, and the gas flow controller keeps the maximum opening degree, so that the final inflation pressure in the measured controller body can be ensured to safely reach the detection initial pressure required by the process; in the pressure maintaining test period, after the constant pressure inflation period is finished, closing the stop valve K1, and beginning to meter and read the change value of the air pressure in the measured controller along with the time; if the product has a leakage point, the air pressure in the measured controller is continuously reduced, after the judgment time is up, the gas leakage amount is calculated through a leakage amount calculation model, the gas leakage amount is popularized and compared with the design index, and finally the qualification of the product is judged; and in the exhaust period, after the test is finished, the gas in the tested controller is exhausted by opening the stop valve K2, and the tested controller is taken out to finish the detection process.
6. The model of claim 4, wherein the model is characterized by an inverse relationship of V, P when n and T are constant, and the pressure value as a function of the leak is:
P 1 *V＝P 2 *V+P 0 *V leakage
In the formula: p 1 The initial pressure of the measured controller is MPa; p 2 The pressure is the pressure of the measured controller during testing, MPa; p 0 Is the ambient air pressure, MPa; v leak is the volume of gas leaked into the environment, L; v is the equivalent volume inside the measured controller, L; m is the gas leakage per unit time, L/s; t is the detection interval time, s.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210772463.4A CN115077812A (en) | 2022-06-30 | 2022-06-30 | Electric vehicle controller seals detecting system |
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| Application Number | Priority Date | Filing Date | Title |
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| CN202210772463.4A CN115077812A (en) | 2022-06-30 | 2022-06-30 | Electric vehicle controller seals detecting system |
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| CN115077812A true CN115077812A (en) | 2022-09-20 |
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| CN202210772463.4A Withdrawn CN115077812A (en) | 2022-06-30 | 2022-06-30 | Electric vehicle controller seals detecting system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117147070A (en) * | 2023-10-30 | 2023-12-01 | 菏泽市产品检验检测研究院 | Air tightness detection system and detection method for tubular medical instrument |
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2022
- 2022-06-30 CN CN202210772463.4A patent/CN115077812A/en not_active Withdrawn
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN117147070A (en) * | 2023-10-30 | 2023-12-01 | 菏泽市产品检验检测研究院 | Air tightness detection system and detection method for tubular medical instrument |
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Application publication date: 20220920 |