CN112763825A - Method and device for detecting gasket of electromagnetic valve - Google Patents
Method and device for detecting gasket of electromagnetic valve Download PDFInfo
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- CN112763825A CN112763825A CN202011553501.4A CN202011553501A CN112763825A CN 112763825 A CN112763825 A CN 112763825A CN 202011553501 A CN202011553501 A CN 202011553501A CN 112763825 A CN112763825 A CN 112763825A
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- gasket
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- electromagnetic valve
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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
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/25—Arrangements for measuring currents or voltages or for indicating presence or sign thereof using digital measurement techniques
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Abstract
The invention relates to a method and a device for detecting a gasket of an electromagnetic valve. The scheme has the advantages of small environmental interference, simple operation and high accuracy.
Description
Technical Field
The invention relates to the field of solenoid valve gasket detection.
Background
In order to avoid air leakage, gaskets are generally installed in the electromagnetic valves to enhance the sealing performance, some types of electromagnetic valves adopt an adhesion mode to fix the gaskets, the gaskets may be leaked or fall after adhesion, and whether the gaskets are installed on the electromagnetic valves or not is generally detected. The existing detection methods are various, for example, the judgment is carried out through noise when the electromagnetic valve is attracted, rigid collision exists between an electromagnetic valve iron core without a gasket and a sliding rod, the noise is large, the noise is small when the gasket is attached, but the method needs to be carried out in a quiet environment, and the judgment error is possible if a workshop is noisy. Therefore, there is room for improvement in the existing method of solenoid valve gasket detection.
Disclosure of Invention
One technical problem addressed by one aspect of the present disclosure is to provide an improved solenoid valve gasket detection method and a corresponding apparatus.
The technical scheme adopted by the invention for solving the technical problems is as follows: a solenoid valve gasket detection method, the method comprises the following steps,
acquiring a current parameter generated when the electromagnetic valve provided with the gasket is attracted as a first reference value;
acquiring a current parameter generated when the electromagnetic valve without the gasket is attracted as a second reference value;
taking the value between the first reference value and the second reference value as a threshold value;
acquiring a current parameter generated when the solenoid valve to be detected is attracted as a third reference value;
the third reference value is compared to a threshold value, e.g.,
when the third reference value is smaller than the threshold value, judging that the solenoid valve to be detected is not provided with the gasket;
and when the third reference value is larger than the threshold value, judging that the solenoid valve to be detected is provided with the gasket.
In the solenoid valve gasket detection method, the threshold value is a middle value of the sum of the first reference value and the second reference value.
A solenoid valve gasket detection device, the device comprises,
the master control unit controls the device to operate, and is provided with:
the power supply unit provides electric support for the operation of the device;
the connecting unit is electrically connected with the electromagnetic valve;
a setting unit for setting a threshold value of the current parameter;
and the detection judging unit is used for detecting the current parameter when the electromagnetic valve is attracted, comparing the current parameter with a threshold value, judging whether the electromagnetic valve is provided with the gasket or not, and outputting detection judging data.
One advantageous effect brought by one aspect of the present disclosure: the current of solenoid valve during operation is detected, whether install the gasket according to the current parameter judgement, and it is more convenient to operate, and the judged result is more accurate.
Drawings
Certain embodiments of the invention will now be described in detail, by way of example and not limitation, with reference to the figures, wherein like reference numerals identify identical or similar elements or portions. Those skilled in the art will appreciate that the drawings are not necessarily drawn to scale.
In the drawings:
FIG. 1 is a schematic view of a current characteristic curve of a solenoid valve without a gasket according to the present invention;
FIG. 2 is a schematic view of a current characteristic curve of a gasket-mounted solenoid valve of the present invention;
FIG. 3 is a schematic diagram of a first portion of the circuit of the apparatus of the present invention;
FIG. 4 is a second schematic diagram of a circuit of the present invention;
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the drawings of the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments.
All other embodiments, which can be derived by a person skilled in the art from the described embodiments of the invention without any inventive step, are within the scope of protection of the invention. Unless defined otherwise, technical or scientific terms used herein shall have the ordinary meaning as understood by one of ordinary skill in the art to which this invention belongs.
The use of "first," "second," and similar terms in this disclosure is not intended to indicate any order, quantity, or importance, but rather is used to distinguish one element from another. Also, the use of the terms "a," "an," or "the" and similar referents do not denote a limitation of quantity, but rather denote the presence of at least one. The word "comprising" or "comprises", and the like, means that the element or item listed before the word covers the element or item listed after the word and its equivalents, but does not exclude other elements or items. The terms "connected" or "coupled" and the like are not restricted to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "upper", "lower", "left", "right", and the like are used merely to indicate relative positional relationships, and when the absolute position of the object being described is changed, the relative positional relationships may also be changed accordingly.
The invention provides a method for detecting a gasket of an electromagnetic valve, which is used for detecting whether the gasket is installed on the electromagnetic valve or not, and comprises the following steps: acquiring a current parameter generated when the electromagnetic valve provided with the gasket is attracted as a first reference value;
acquiring a current parameter generated when the electromagnetic valve without the gasket is attracted as a second reference value;
taking a value between the first reference value and the second reference value as a threshold value, for example, taking the middle value of the sum of the first reference value and the second reference value as the threshold value;
acquiring a current parameter generated when the solenoid valve to be detected is attracted as a third reference value;
the third reference value is compared to a threshold value, e.g.,
when the third reference value is smaller than the threshold value, judging that the solenoid valve to be detected is not provided with the gasket;
and when the third reference value is larger than the threshold value, judging that the solenoid valve to be detected is provided with the gasket.
The electromagnetic valve with the gasket has a buffering effect during attraction, the iron core cannot be completely attracted to the bottom, and the inductance variation is not very large, so that the current does not obviously sink when the sliding rod is attracted to the bottom, and the current characteristic curve chart shown in fig. 1 is referred. The electromagnetic valve without the gasket has the advantages that the iron core directly collides with the slide bar, inductance can change greatly, and the phenomenon is shown that the current of the electromagnetic valve is very obviously concave when the slide bar is attracted to the bottom, and the reference is made to figure 2. In a test example, the valley point (solenoid valve actuation time point) in the two drawings corresponds to the current a/D conversion value b: 092. b: 054, taking the value d:084 between the two values as a threshold, judging that the solenoid valve is not provided with the gasket if the actually measured value b: of the solenoid valve to be tested is less than d:084 in the subsequent solenoid valve test of the type, and considering that the solenoid valve is provided with the gasket if the actually measured value b: of the solenoid valve to be tested is more than or equal to d: 084. The standard value is almost not equal to the actual measurement test value, and if the standard value is equal to the actual measurement test value, the abnormal condition can be judged.
The device comprises a main control unit, wherein the main control unit is used for controlling the operation of an adjusting device, the main control unit is connected with a power supply unit, a connecting unit, a setting unit and a detection and judgment unit, the power supply unit is used for providing electric power support for the operation of the device, the connecting unit is electrically connected with the detected electromagnetic valve, the setting unit is used for setting a threshold value of a current parameter, the detection and judgment unit is used for detecting the current parameter of the connected electromagnetic valve during actuation, comparing the current parameter with a preset threshold value and outputting detection and judgment data. The detection judgment data can comprise contents such as a current curve graph, a current A/D value of the pull-in time point, a judgment result and the like, and can be visually displayed on a screen.
The device is internally provided with a default threshold, if the electromagnet of a certain model needs to be detected, the electromagnetic valve provided with the gasket and the electromagnetic valve not provided with the gasket are detected through the device, at the moment, the device can give a judgment result according to the default threshold, and the device can be arranged just by acquiring corresponding current parameters. And selecting a certain numerical value as a new threshold value according to the obtained current parameter, inputting the new threshold value through an operation setting unit, such as a solid key and a touch screen type operation, replacing the default threshold value, and then starting formal detection work. And judging whether the gasket is installed on the electromagnetic valve according to a comparison result of the current value of the electromagnetic valve and the threshold value, if the actually measured current parameter is smaller than the threshold value, judging that the gasket is not installed on the electromagnetic valve, and if the actually measured current parameter is larger than the threshold value, judging that the gasket is installed on the electromagnetic valve.
The current detection of the electromagnetic valve can be realized by various prior arts, referring to fig. 3-4, in the scheme of the application, the main control unit can adopt an MCS-51 single chip microcomputer with the model of STC90C58AD, adopt MAX813 as a watchdog circuit, prevent the single chip microcomputer from crashing, and configure a serial port circuit with the MAX3232 as a main IC chip so as to write in a program. In order to improve the testing efficiency, a plurality of electromagnetic valves can be connected into a whole and electrically connected with the device through a plug-in lead, the device adopts IC UNL2004 to sequentially drive the electromagnetic valves to be attracted in turn, and the current on when the electromagnetic valves are attracted can be fed back to corresponding pins of the single chip microcomputer through the Hall sensing module.
In conclusion, the method and the device for detecting the gasket of the electromagnetic valve can judge whether the gasket is installed or not by detecting the current of the electromagnetic valve, and the technology has the advantages of small interference degree of the environment, simple operation and high accuracy.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the present invention, as it will be apparent to those skilled in the art that various modifications, combinations and variations can be made in the present invention. Any modification, equivalent replacement, or improvement made within the spirit and principle of the present invention should be included in the scope of the claims of the present invention.
Claims (3)
1. A solenoid valve gasket detection method is characterized in that: the method comprises the following steps of,
acquiring a current parameter generated when the electromagnetic valve provided with the gasket is attracted as a first reference value;
acquiring a current parameter generated when the electromagnetic valve without the gasket is attracted as a second reference value;
taking the value between the first reference value and the second reference value as a threshold value;
acquiring a current parameter generated when the solenoid valve to be detected is attracted as a third reference value;
the third reference value is compared to a threshold value, e.g.,
when the third reference value is smaller than the threshold value, judging that the solenoid valve to be detected is not provided with the gasket;
and when the third reference value is larger than the threshold value, judging that the solenoid valve to be detected is provided with the gasket.
2. The method for detecting the gasket of the electromagnetic valve according to claim 1, wherein:
the threshold value is a median value of a sum of the first reference value and the second reference value.
3. The utility model provides a solenoid valve gasket detection device which characterized in that: the device comprises a plurality of devices which are connected with each other,
the master control unit controls the device to operate, and is provided with:
the power supply unit provides electric support for the operation of the device;
the connecting unit is electrically connected with the electromagnetic valve;
a setting unit that sets a threshold value of the current parameter;
and the detection judging unit is used for detecting the current parameter when the electromagnetic valve is attracted, comparing the current parameter with a threshold value, judging whether the electromagnetic valve is provided with the gasket or not, and outputting detection judging data.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011553501.4A CN112763825A (en) | 2020-12-24 | 2020-12-24 | Method and device for detecting gasket of electromagnetic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202011553501.4A CN112763825A (en) | 2020-12-24 | 2020-12-24 | Method and device for detecting gasket of electromagnetic valve |
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| CN112763825A true CN112763825A (en) | 2021-05-07 |
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| CN202011553501.4A Pending CN112763825A (en) | 2020-12-24 | 2020-12-24 | Method and device for detecting gasket of electromagnetic valve |
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Citations (5)
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|---|---|---|---|---|
| DE10124109A1 (en) * | 2001-05-17 | 2002-12-12 | Bosch Gmbh Robert | Monitoring magnetic valve circuit drift, e.g. for vehicle ABS, involves applying PWM input pulse sequence to switch elements to initiate difference measurement at subtraction stage by pulse counting |
| CN103792442A (en) * | 2012-10-31 | 2014-05-14 | 中国广东核电集团有限公司 | Electromagnetic valve detection method and electromagnetic valve detection device for main steam isolation valve of nuclear power plant |
| CN104020378A (en) * | 2014-06-10 | 2014-09-03 | 杭州泽天科技有限公司 | Detection method and device for multiple solenoid valves |
| CN111323663A (en) * | 2020-02-26 | 2020-06-23 | 中南大学 | Electromagnetic valve service life prediction method and device based on current feature extraction |
| CN111880089A (en) * | 2020-07-27 | 2020-11-03 | 深圳市宗泰电机有限公司 | Electromagnet action state testing method and device |
-
2020
- 2020-12-24 CN CN202011553501.4A patent/CN112763825A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10124109A1 (en) * | 2001-05-17 | 2002-12-12 | Bosch Gmbh Robert | Monitoring magnetic valve circuit drift, e.g. for vehicle ABS, involves applying PWM input pulse sequence to switch elements to initiate difference measurement at subtraction stage by pulse counting |
| CN103792442A (en) * | 2012-10-31 | 2014-05-14 | 中国广东核电集团有限公司 | Electromagnetic valve detection method and electromagnetic valve detection device for main steam isolation valve of nuclear power plant |
| CN104020378A (en) * | 2014-06-10 | 2014-09-03 | 杭州泽天科技有限公司 | Detection method and device for multiple solenoid valves |
| CN111323663A (en) * | 2020-02-26 | 2020-06-23 | 中南大学 | Electromagnetic valve service life prediction method and device based on current feature extraction |
| CN111880089A (en) * | 2020-07-27 | 2020-11-03 | 深圳市宗泰电机有限公司 | Electromagnet action state testing method and device |
Non-Patent Citations (1)
| Title |
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| 曹晴峰: "《建筑设备控制工程》", 中国电力出版社, pages: 87 * |
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