CN105067202A - Electromechanical valve tightness intelligent detection device and detection method thereof - Google Patents
Electromechanical valve tightness intelligent detection device and detection method thereof Download PDFInfo
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- CN105067202A CN105067202A CN201510442297.1A CN201510442297A CN105067202A CN 105067202 A CN105067202 A CN 105067202A CN 201510442297 A CN201510442297 A CN 201510442297A CN 105067202 A CN105067202 A CN 105067202A
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Abstract
The invention discloses an electromechanical valve tightness intelligent detection device and a detection method thereof. The device comprises a pressure acquisition device, an analog to digital conversion device, a stroke solenoid valve which is used for fixing a device to be detected, a pneumatic solenoid valve which is used for pressurizing the device to be detected, a timer and a microcontroller. The signal output end of the pressure acquisition device is connected with the signal input end of the analog to digital conversion device. The signal output end of the analog to digital conversion device is connected with the signal input end of the microcontroller. The control output end of the microcontroller is connected with the control input ends of the stroke solenoid valve and the pneumatic solenoid valve. The microcontroller is connected with the timer. According to the invention, automatic electromechanical valve tightness detection is realized; human judgment is not needed; and a detection result is accurate.
Description
Technical field
The present invention relates to air-leakage test technical field, particularly relate to electromechanical valve impermeability intelligent detection equipment and detection method thereof.
Background technology
Existing gas meter, flow meter electromechanical valve air-leakage test mode mostly adopts U-tube to detect the mode of electromechanical valve leakage value, judges electromechanical valve leakage value by the liquid level change on U-tube both sides within a certain period of time.Whether this kind of mode needs the liquid position on manual observation U-tube both sides to change, calculate leakage value and meet the demands.But existing electromechanical valve detection mode has the following disadvantages:
(1) by artificial judgment electromechanical valve leakage value, testing result is comparatively large by the impact of human factor, can not ensure the accuracy of testing result well, and then affect product quality;
(2) one man operation checkout equipment, is unfavorable for enhancing productivity.
Summary of the invention
The object of the invention is to overcome the deficiencies in the prior art, electromechanical valve impermeability intelligent detection equipment and detection method thereof are provided, the bubble-tight automatic detection of electromechanical valve can be realized, without the need to artificial judgment, thus ensure the accuracy of testing result.
The object of the invention is to be achieved through the following technical solutions: electromechanical valve impermeability intelligent detection equipment, comprise pressure acquisition device, analog-digital commutator, for the stroke electromagnetic valve of fixing Devices to test, for the inflation solenoid valve pressurizeed to Devices to test, timer and microcontroller, the signal output part of pressure acquisition device is connected with the signal input part of analog-digital commutator, the signal output part of analog-digital commutator is connected with the signal input part of microcontroller, the control output end of microcontroller is connected with stroke electromagnetic valve and the control input end of inflating solenoid valve respectively, microcontroller is also connected with timer.
Further, also comprise display device, display device is connected with microcontroller.
Further, also comprise temperature sensor, temperature sensor is connected with microcontroller.
Further, also comprise for showing test results the first qualified pilot lamp and for the second qualified pilot lamp that shows test results, the first pilot lamp is all connected with microcontroller with the second pilot lamp.
The bubble-tight detection method of electromechanical valve, comprises the following steps:
S1. Devices to test fixed by microprocessor controls stroke electromagnetic valve, and control inflation solenoid valve pressurizes to Devices to test;
S2. pressure acquisition device gathers the pressure signal of Devices to test, and this pressure signal is sent to analog-digital commutator;
S3. described pressure signal is converted to digital signal by analog-digital commutator, and this digital signal is sent to microcontroller;
S4. microcontroller calculates the force value of Devices to test, when the force value of Devices to test is more than or equal to default stopping charge pressure value, microprocessor controls inflation solenoid valve stops inflating to Devices to test, and control timer and start timing, the force value of now Devices to test is designated as the first force value;
S5., when the time of timer record reaches the default leak detection time, the force value of now Devices to test is designated as the second force value;
S6. microcontroller calculates the pressure difference value of the first force value and the second force value;
S7. the more described pressure difference value of microcontroller and the gas pressure leak value preset:
If pressure difference value is less than gas pressure leak value, then testing result is qualified, and microprocessor controls first pilot lamp is lighted;
If pressure difference value is greater than gas pressure leak value, then testing result is defective, and microprocessor controls second pilot lamp is lighted;
S8. microprocessor controls stroke electromagnetic valve release Devices to test.
Also comprise temperature sensor before step S4 and gather ambient temperature data, and this ambient temperature data is sent to the step of microcontroller.
Further, the step being stopped charge pressure value, leak detection time and air pressure leakage value by display device setting is also comprised.
Further, the step of display device display testing result is also comprised.
The invention has the beneficial effects as follows:
(1) the present invention can realize the bubble-tight automatic detection of electromechanical valve, without the need to artificial judgment, avoids the impact of human factor on testing result, improves the accuracy of testing result;
(2) temperature sensor gathers the temperature data of surrounding environment, and microcontroller, according to this temperature data compensate for ambient temperature, eliminates the impact of A/D conversion accuracy by variation of ambient temperature.
Accompanying drawing explanation
Fig. 1 is the structured flowchart of electromechanical valve impermeability intelligent detection equipment of the present invention;
Fig. 2 realizes block diagram when four electromechanical valve detect simultaneously;
Fig. 3 is the process flow diagram of the bubble-tight detection method of electromechanical valve of the present invention.
Embodiment
Below in conjunction with accompanying drawing, technical scheme of the present invention is described in further detail, but protection scope of the present invention is not limited to the following stated.
As shown in Figure 1, electromechanical valve impermeability intelligent detection equipment, comprise pressure acquisition device, analog-digital commutator, for the stroke electromagnetic valve of fixing Devices to test, inflation solenoid valve, timer and the microcontroller for pressurizeing to Devices to test, the signal output part of pressure acquisition device is connected with the signal input part of analog-digital commutator, the signal output part of analog-digital commutator is connected with the signal input part of microcontroller, the control output end of microcontroller is connected with stroke electromagnetic valve and the control input end of inflating solenoid valve respectively, and microcontroller is also connected with timer.
Described pressure acquisition device comprises pressure transducer, and the pressure signal of the 0 ~ 20KPa collected is converted to the current signal of 4 ~ 20mA by pressure transducer, then 1 μ A=1.25Pa; Described analog-digital commutator comprises the AD7705 modulus conversion chip of 16, the then current signal correspondence 0 ~ 65535dpi of 4 ~ 20mA, then 1 μ A ≈ 4dpi ≈ 1.25Pa, therefore can identify the change of 2Pa slight pressure, make the present invention have very high accuracy of detection in the scope of 0 ~ 20KPa.The simulating signal input of analog-digital commutator adopts the mode of Differential Input, can reduce the impact of external interference signals on current signal, improve analog-to-digital accuracy.Microcontroller can also set the enlargement factor of analog-digital commutator to input signal, and can control analog-digital commutator carries out digital filtering to the undesired signal of different frequency in simulating signal simultaneously.
Microcontroller implementation controls analog-digital commutator, stroke electromagnetic valve and the inflation startup of solenoid valve and closedown, thus to realize being fixed electromechanical valve, observing and controlling system of pressurizeing, air pressure retentive control, pressure release control, release electromechanical valve controls; And the display and control etc. to test result.
Timer starts timing when inflating solenoid valve stopping and pressurizeing to electromechanical valve, and the time data of record is sent to microcontroller in real time.
Further, also comprise display device, display device is connected with microcontroller.Display device stops charge pressure value, leak detection time and air pressure leakage value for setting, and shows testing result.
Further, also comprise temperature sensor, temperature sensor is connected with microcontroller.Temperature sensor collecting temperature data, and the temperature number collected is sent to microcontroller, microcontroller compensates the A/D conversion accuracy change that variation of ambient temperature causes according to this temperature data.
Further, also comprise for showing test results the first qualified pilot lamp and for the second qualified pilot lamp that shows test results, the first pilot lamp is all connected with microcontroller with the second pilot lamp.
The present invention detects while can also realizing multiple stage electromechanical valve, as shown in Figure 2, pressure difference detection device comprises microcontroller, display device and analog-digital commutator, indicating device comprises the first pilot lamp and the second pilot lamp, electromagnetic valve device comprises stroke electromagnetic valve and inflation solenoid valve, first pressure difference detection device respectively with the first pressure acquisition device, first timer, first electromagnetic valve device is connected with the first indicating device, second pressure difference detection device respectively with the second pressure acquisition device, second timer, second electromagnetic valve device is connected with the second indicating device, 3rd pressure difference detection device respectively with the 3rd pressure acquisition device, 3rd timer, 3rd electromagnetic valve device is connected with the 3rd indicating device, 4th pressure difference detection device respectively with the 4th pressure acquisition device, 4th timer, 4th electromagnetic valve device is connected with the 4th indicating device.First pressure difference detection device is connected with the two ends of the first switch and second switch respectively, second pressure difference detection device is connected with the two ends of the first switch and the 3rd switch respectively, 3rd pressure difference detection device is connected with the two ends of the first switch and the 4th switch respectively, and the 4th pressure difference detection device is connected with the two ends of the first switch and the 5th switch respectively.The air-leakage test that the first pressure difference detection device, the second pressure difference detection device, the 3rd pressure difference detection device and the 4th pressure difference detection device carry out electromechanical valve simultaneously can be controlled by the first switch, also control separately the first pressure difference detection device by second switch, the second pressure difference detection device is controlled separately by the 3rd switch, control separately the 3rd pressure difference detection device by the 4th switch, control separately the 4th pressure difference detection device by the 5th switch.
As shown in Figure 3, the bubble-tight detection method of electromechanical valve, comprises the following steps:
S1. Devices to test fixed by microprocessor controls stroke electromagnetic valve, and control inflation solenoid valve pressurizes to Devices to test;
S2. pressure acquisition device gathers the pressure signal of Devices to test, and this pressure signal is sent to analog-digital commutator;
S3. described pressure signal is converted to digital signal by analog-digital commutator, and this digital signal is sent to microcontroller;
S4. microcontroller calculates the force value of Devices to test, when the force value of Devices to test is more than or equal to default stopping charge pressure value, microprocessor controls inflation solenoid valve stops inflating to Devices to test, and control timer and start timing, the force value of now Devices to test is designated as the first force value;
S5., when the time of timer record reaches the default leak detection time, the force value of now Devices to test is designated as the second force value;
S6. microcontroller calculates the pressure difference value of the first force value and the second force value;
S7. the more described pressure difference value of microcontroller and the gas pressure leak value preset:
If pressure difference value is less than gas pressure leak value, then testing result is qualified, and microprocessor controls first pilot lamp is lighted;
If pressure difference value is greater than gas pressure leak value, then testing result is defective, and microprocessor controls second pilot lamp is lighted;
S8. microprocessor controls stroke electromagnetic valve release Devices to test.
Also comprise temperature sensor before step S4 and gather ambient temperature data, and this ambient temperature data is sent to the step of microcontroller.
Further, the step being stopped charge pressure value, leak detection time and air pressure leakage value by display device setting is also comprised, before this step is positioned at step S4.Described stopping charge pressure value, leak detection time and air pressure leakage value can sets itself as required, if leak detection set of time is 30s, stop charge pressure value to be set to 15kPa.
Further, the step of display device display testing result is also comprised.
Claims (8)
1. electromechanical valve impermeability intelligent detection equipment, it is characterized in that: comprise pressure acquisition device, analog-digital commutator, for the stroke electromagnetic valve of fixing Devices to test, for the inflation solenoid valve pressurizeed to Devices to test, timer and microcontroller, the signal output part of pressure acquisition device is connected with the signal input part of analog-digital commutator, the signal output part of analog-digital commutator is connected with the signal input part of microcontroller, the control output end of microcontroller is connected with stroke electromagnetic valve and the control input end of inflating solenoid valve respectively, microcontroller is also connected with timer.
2. electromechanical valve impermeability intelligent detection equipment according to claim 1, it is characterized in that: also comprise display device, display device is connected with microcontroller.
3. electromechanical valve impermeability intelligent detection equipment according to claim 1, it is characterized in that: also comprise temperature sensor, temperature sensor is connected with microcontroller.
4. electromechanical valve impermeability intelligent detection equipment according to claim 1, it is characterized in that: also comprise for showing test results the first qualified pilot lamp and for the second qualified pilot lamp that shows test results, the first pilot lamp is all connected with microcontroller with the second pilot lamp.
5. the bubble-tight detection method of electromechanical valve, is characterized in that: comprise the following steps:
S1. Devices to test fixed by microprocessor controls stroke electromagnetic valve, and control inflation solenoid valve pressurizes to Devices to test;
S2. pressure acquisition device gathers the pressure signal of Devices to test, and this pressure signal is sent to analog-digital commutator;
S3. described pressure signal is converted to digital signal by analog-digital commutator, and this digital signal is sent to microcontroller;
S4. microcontroller calculates the force value of Devices to test, when the force value of Devices to test is more than or equal to default stopping charge pressure value, microprocessor controls inflation solenoid valve stops inflating to Devices to test, and control timer and start timing, the force value of now Devices to test is designated as the first force value;
S5., when the time of timer record reaches the default leak detection time, the force value of now Devices to test is designated as the second force value;
S6. microcontroller calculates the pressure difference value of the first force value and the second force value;
S7. the more described pressure difference value of microcontroller and the gas pressure leak value preset:
If pressure difference value is less than gas pressure leak value, then testing result is qualified, and microprocessor controls first pilot lamp is lighted;
If pressure difference value is greater than gas pressure leak value, then testing result is defective, and microprocessor controls second pilot lamp is lighted;
S8. microprocessor controls stroke electromagnetic valve release Devices to test.
6. the bubble-tight detection method of electromechanical valve according to claim 5, is characterized in that: also comprise temperature sensor before step S4 and gather ambient temperature data, and this ambient temperature data is sent to the step of microcontroller.
7. the bubble-tight detection method of electromechanical valve according to claim 5, is characterized in that: also comprise the step being stopped charge pressure value, leak detection time and air pressure leakage value by display device setting.
8. the bubble-tight detection method of electromechanical valve according to claim 5, is characterized in that: the step also comprising display device display testing result.
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| CN201510442297.1A CN105067202B (en) | 2015-07-24 | 2015-07-24 | Electromechanical valve air-tightness intelligent detection equipment and its detection method |
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| CN105422854A (en) * | 2015-12-29 | 2016-03-23 | 周庆涛 | Self-pressure test gasket and application method thereof |
| CN108709733A (en) * | 2018-08-06 | 2018-10-26 | 广东万家乐燃气具有限公司 | A kind of solenoid travel and air-tightness detection device |
| CN109632203A (en) * | 2018-11-16 | 2019-04-16 | 嘉兴学院 | A kind of high-precision air tightness leakage detection apparatus and method |
| CN109708826A (en) * | 2018-12-17 | 2019-05-03 | 成都秦川物联网科技股份有限公司 | A kind of differential pressure type detection system and method |
| CN109707700A (en) * | 2019-01-29 | 2019-05-03 | 石家庄市科恒电子有限公司 | A kind of intelligent detecting method and device of Portable engineering Weapon Hydraulic System |
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| CN109707700A (en) * | 2019-01-29 | 2019-05-03 | 石家庄市科恒电子有限公司 | A kind of intelligent detecting method and device of Portable engineering Weapon Hydraulic System |
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| CN105067202B (en) | 2018-12-04 |
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