CN108896241B - Vacuum degree detection system and method - Google Patents
Vacuum degree detection system and method Download PDFInfo
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- CN108896241B CN108896241B CN201810242335.2A CN201810242335A CN108896241B CN 108896241 B CN108896241 B CN 108896241B CN 201810242335 A CN201810242335 A CN 201810242335A CN 108896241 B CN108896241 B CN 108896241B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L27/00—Testing or calibrating of apparatus for measuring fluid pressure
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- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05D—SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES
- G05D16/00—Control of fluid pressure
- G05D16/20—Control of fluid pressure characterised by the use of electric means
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Abstract
The invention discloses a vacuum degree detection system, which comprises: the vacuum chamber, a vacuum generator for vacuumizing the vacuum chamber, a negative pressure gauge for reading the vacuum degree in the vacuum chamber, a first electromagnetic valve for controlling the deflation of the vacuum chamber, a vacuum sensor for detecting the vacuum degree and a controller; the vacuum generator, the negative pressure gauge, the vacuum sensor and the first electromagnetic valve are all connected with the vacuum chamber, and the negative pressure gauge and the vacuum sensor are also connected with the controller. Based on the vacuum degree detection system, the invention also discloses a vacuum degree detection method. The vacuum degree detection system and the method can realize automatic detection of the vacuum sensor, improve the detection efficiency, shorten the detection time from 18s to 8 s; and the feedback signal is judged by the controller, so that manual judgment is avoided, and misjudgment is eliminated.
Description
Technical Field
The invention relates to the technical field of detection methods, in particular to a vacuum degree detection system and method.
Background
The vacuum sensor is a commonly used pressure sensor, is widely applied to various industrial automatic control environments, and relates to various industries such as petroleum pipelines, water conservancy and hydropower, railway traffic, intelligent buildings, production automatic control, aerospace, military industry, petrifaction, oil wells, electric power, ships, machine tools, ventilation pipelines and the like. The vacuum sensor is characterized by that the pressure of medium is directly acted on the diaphragm of the sensor, so that the diaphragm can produce micro-displacement in direct proportion to the pressure of medium, and the resistance of the sensor can be changed, and said change can be detected by means of electronic circuit, and converted and outputted into a standard signal correspondent to said pressure.
The vacuum degree of the existing vacuum sensor adopts a manual detection method, the manual detection method of the vacuum sensor is to connect the sensor to a vacuum pump, manually increase vacuum negative pressure through a pressure controller, observe whether the sensor works after a set value is reached, and observe whether the sensor stops after the vacuum negative pressure is continuously increased to a certain value. The method has low efficiency, needs manual judgment and is easy to misjudge.
Therefore, the invention provides an automatic vacuum degree detection system and method.
Disclosure of Invention
The invention mainly aims to provide a vacuum degree detection system and method, which have the advantages of automatic detection, detection efficiency improvement and misjudgment elimination.
In order to achieve the purpose, the invention adopts the technical scheme that:
a vacuum detection system comprising:
a vacuum chamber;
a vacuum generator for evacuating the vacuum chamber;
a negative pressure gauge for reading the vacuum degree in the vacuum chamber;
a first solenoid valve for controlling the deflation of the vacuum chamber;
a vacuum sensor for detecting vacuum degree;
and a controller;
the vacuum generator, the negative pressure gauge, the vacuum sensor and the first electromagnetic valve are all connected with the vacuum chamber, and the negative pressure gauge and the vacuum sensor are also connected with the controller.
Preferably, the vacuum degree detection system further comprises a first exhaust throttle valve, and the first exhaust throttle valve and the first electromagnetic valve are sequentially connected to the vacuum chamber.
Preferably, the first exhaust throttle valve is used for controlling the speed of the negative pressure rising of the vacuum chamber.
Preferably, the vacuum degree detection system further comprises a second electromagnetic valve and a second exhaust throttle valve, and the second electromagnetic valve and the second exhaust throttle valve are sequentially connected between the vacuum generator and the vacuum chamber.
Preferably, the second exhaust throttle valve is used for controlling the speed of reducing the negative pressure of the vacuum chamber.
A vacuum degree detection method specifically comprises the following steps:
s100, vacuumizing the vacuum chamber, reading the current first vacuum degree by the controller when a vacuum sensor feeds back a signal to the controller, stopping vacuumizing when the vacuum chamber reaches a set vacuum degree, and entering the next step;
and S200, deflating the vacuum chamber, and reading the second vacuum degree by the controller when the vacuum sensor feeds back a signal to the controller.
Preferably, before the step S100, the method further includes:
s0: and presetting a set vacuum degree in the controller, wherein the set vacuum degree is determined according to the vacuum sensor to be detected.
Preferably, the step S100 specifically includes:
s101, opening a second electromagnetic valve, and vacuumizing a vacuum chamber through a vacuum generator;
s102, reading a vacuum degree detected by a negative pressure gauge at intervals of a set time by a controller;
and S103, reducing the negative pressure in the vacuum chamber, feeding back a signal to the controller by the vacuum sensor when the vacuum degree is reduced to the lower vacuum degree limit of the vacuum sensor, and acquiring the first vacuum degree read by the controller.
And step S104, continuing to vacuumize, and stopping vacuumization when the vacuum chamber reaches a set vacuum degree.
Preferably, the step S200 specifically includes:
step S201, opening a first electromagnetic valve to deflate a vacuum chamber;
step S202, the controller reads a vacuum degree detected by the negative pressure gauge at intervals of a set time;
and S203, increasing the negative pressure in the vacuum chamber, feeding back a signal to the controller by the vacuum sensor when the vacuum degree is increased to the upper limit of the vacuum degree of the vacuum sensor, and acquiring the second vacuum degree read by the controller.
Compared with the prior art, the vacuum generator disclosed by the invention is used for vacuumizing or deflating the vacuum chamber, the negative pressure vacuum degree of the negative pressure gauge is obtained by the controller when the feedback signal of the vacuum sensor is obtained, the lowest value of the vacuum degree receiving range of the vacuum sensor is measured when the negative pressure is increased, and the highest value of the vacuum degree receiving range of the vacuum sensor is measured when the negative pressure is reduced. The vacuum degree detection system and the method can realize automatic detection of the vacuum sensor, improve the detection efficiency, shorten the detection time from 18s to 8 s; and the feedback signal is judged by the controller, so that manual judgment is avoided, and misjudgment is eliminated.
Drawings
Fig. 1 is a schematic view of a combination structure of a vacuum degree detection system and a vacuum sensor according to an embodiment of the present invention.
FIG. 2 is a flow chart of a vacuum level detection method according to an embodiment of the present invention.
Detailed Description
In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further described with the specific embodiments.
The present invention provides an automatic vacuum degree detection system 100 for detecting the vacuum degree of a vacuum sensor 60, fig. 1 is a schematic structural diagram of the vacuum degree detection system 100 according to an embodiment of the present invention, and as shown in fig. 1, the vacuum degree detection system 100 according to the present embodiment includes a vacuum chamber 10, a vacuum generator 20, a negative pressure gauge 30, a vacuum sensor 60 for detecting the vacuum degree, a first solenoid valve 40, and a controller 70, wherein the vacuum generator 20 is used for vacuumizing the vacuum chamber 10, the negative pressure gauge 30 is used for reading the vacuum degree in the vacuum chamber 10, and the first solenoid valve 40 is used for controlling the vacuum chamber 10 to deflate.
Specifically, the connection relationship between the components is as follows:
referring to fig. 1, as shown in fig. 1, a vacuum generator 20, a negative pressure gauge 30, a vacuum sensor 60 and a first solenoid valve 40 of the present embodiment are all connected to a vacuum chamber 10, and the negative pressure gauge 30 and the vacuum sensor 60 are further connected to a controller 70.
Furthermore, the vacuum degree detection system 100 of the present embodiment further includes a first exhaust throttle valve 50, a second electromagnetic valve 80, and a second exhaust throttle valve 90, wherein the first exhaust throttle valve 50 is used for controlling the speed of the negative pressure rising speed of the vacuum chamber 10, the second electromagnetic valve 80 is used for controlling the vacuum pumping of the vacuum chamber 10, and the first exhaust throttle valve 50 is used for controlling the speed of the negative pressure rising speed of the vacuum chamber 10. Wherein, the first exhaust throttle valve 50 and the first solenoid valve 40 are sequentially connected to the vacuum chamber 10, and the second solenoid valve 80 and the second exhaust throttle valve 90 are sequentially connected between the vacuum generator 20 and the vacuum chamber 10. However, the positions of the first solenoid valve 40 and the first exhaust throttle valve 50 in the front-rear direction are not particularly limited, and the positions of the second solenoid valve 80 and the second exhaust throttle valve 90 in the front-rear direction are not particularly limited.
Based on the vacuum degree detection system 100, the present invention further provides a vacuum degree detection method, fig. 2 is a flowchart of the vacuum degree detection method according to the embodiment of the present invention, and as shown in fig. 2, the vacuum degree detection method according to the embodiment specifically includes:
s100, vacuumizing the vacuum chamber, reading the current first vacuum degree by the controller when a vacuum sensor feeds back a signal to the controller, stopping vacuumizing when the vacuum chamber reaches a set vacuum degree, and entering the next step;
and S200, deflating the vacuum chamber, and reading the second vacuum degree by the controller when the vacuum sensor feeds back a signal to the controller.
The vacuum chamber is vacuumized, a lower vacuum degree limit is required to be set, vacuumizing is stopped when the set vacuum degree is reached, specifically, the set vacuum degree is preset in the controller and is determined according to a vacuum sensor to be detected. Example (c): when the vacuum degree receiving range of the vacuum sensor is-40 KPa to-60 KPa, the-40 KPa is the upper limit of the vacuum degree of the vacuum sensor, and the-60 KPa is the lower limit of the vacuum degree of the vacuum sensor, the set vacuum degree can be-70 KPa, but not limited to this, only the set vacuum degree is less than the lower limit of the vacuum degree.
After the preset vacuum degree is finished, the vacuum degree of the vacuum sensor can be detected, the lower vacuum degree limit of the vacuum sensor is measured when the vacuum chamber is vacuumized, and the upper vacuum degree limit of the vacuum sensor is measured when the vacuum chamber is deflated. Step S100 is specifically as follows: opening a second electromagnetic valve, vacuumizing the vacuum chamber through a vacuum generator, reading a vacuum degree detected by a negative pressure gauge by a controller at intervals of a set time, reducing the negative pressure in the vacuum chamber, feeding back a signal to the controller by the vacuum sensor when the vacuum degree is reduced to the lower limit of the vacuum degree of the vacuum sensor, and acquiring the read first vacuum degree by the controller; and continuing to vacuumize, and stopping vacuuming when the vacuum chamber reaches a set vacuum degree.
After the detection of the lower vacuum degree limit of the vacuum sensor is completed, the upper vacuum degree limit of the vacuum sensor is continuously detected, and the step S200 is as follows: and opening the first electromagnetic valve to deflate the vacuum chamber, reading a vacuum degree detected by the negative pressure gauge by the controller at intervals of a set time, increasing the negative pressure in the vacuum chamber, feeding back a signal to the controller by the vacuum sensor when the vacuum degree is increased to the upper limit of the vacuum degree of the vacuum sensor, and acquiring a second vacuum degree read at the moment by the controller.
The first vacuum degree detected is the lower vacuum degree limit of the vacuum sensor, the second vacuum degree detected is the upper vacuum degree limit of the vacuum sensor, and the vacuum degree range of the vacuum sensor is from the first vacuum degree to the second vacuum degree.
Compared with the prior art, the vacuum generator disclosed by the invention is used for vacuumizing or deflating the vacuum chamber, the negative pressure vacuum degree of the negative pressure gauge is obtained by the controller when the feedback signal of the vacuum sensor is obtained, the lowest value of the vacuum degree receiving range of the vacuum sensor is measured when the negative pressure is increased, and the highest value of the vacuum degree receiving range of the vacuum sensor is measured when the negative pressure is reduced. The vacuum degree detection system and the method can realize automatic detection of the vacuum sensor, improve the detection efficiency, shorten the detection time from 18s to 8 s; and the feedback signal is judged by the controller, so that manual judgment is avoided, and misjudgment is eliminated.
The foregoing shows and describes the general principles and broad features of the present invention and advantages thereof. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.
Claims (5)
1. A vacuum detection system, comprising:
a vacuum chamber;
a vacuum generator for evacuating the vacuum chamber;
a negative pressure gauge for reading the vacuum degree in the vacuum chamber;
a first solenoid valve for controlling the deflation of the vacuum chamber;
a vacuum sensor for detecting the upper limit and the lower limit of the vacuum degree;
and a controller;
the vacuum generator, the negative pressure gauge, the vacuum sensor and the first electromagnetic valve are all connected with the vacuum chamber, and the negative pressure gauge and the vacuum sensor are also connected with the controller;
the vacuum chamber is provided with a vacuum chamber, and the vacuum chamber is provided with a negative pressure lifting speed control device;
the vacuum generator is characterized by further comprising a second electromagnetic valve and a second exhaust throttle valve, the second electromagnetic valve and the second exhaust throttle valve are sequentially connected between the vacuum generator and the vacuum chamber, and the second exhaust throttle valve is used for controlling the speed of reducing the negative pressure of the vacuum chamber.
2. A vacuum level detection method using the vacuum level detection system according to claim 1, characterized by comprising the steps of:
s100, vacuumizing the vacuum chamber, reading the current first vacuum degree by the controller when a vacuum sensor feeds back a signal to the controller, stopping vacuumizing when the vacuum chamber reaches a set vacuum degree, and entering the next step;
s200, deflating the vacuum chamber, and reading the second vacuum degree by the controller when the vacuum sensor feeds back a signal to the controller;
the first vacuum degree is the lower limit of the vacuum degree of the vacuum sensor, and the detection is performed
The measured second vacuum degree is the upper vacuum degree limit of the vacuum sensor.
3. The vacuum degree detection method according to claim 2, further comprising, before the step S100:
s0: and presetting a set vacuum degree in the controller, wherein the set vacuum degree is determined according to the vacuum sensor to be detected.
4. The vacuum degree detection method according to claim 2, wherein the step S100 specifically includes:
s101, opening a second electromagnetic valve, and vacuumizing a vacuum chamber through a vacuum generator;
s102, reading a vacuum degree detected by a negative pressure gauge at intervals of a set time by a controller;
s103, reducing the negative pressure in the vacuum chamber, feeding back a signal to the controller by the vacuum sensor when the vacuum degree is reduced to the lower vacuum degree limit of the vacuum sensor, and acquiring the first vacuum degree read at the moment by the controller;
and step S104, continuing to vacuumize, and stopping vacuumization when the vacuum chamber reaches a set vacuum degree.
5. The vacuum degree detection method according to claim 2, wherein the step S200 specifically includes:
step S201, opening a first electromagnetic valve to deflate a vacuum chamber;
step S202, the controller reads a vacuum degree detected by the negative pressure gauge at intervals of a set time;
and S203, increasing the negative pressure in the vacuum chamber, feeding back a signal to the controller by the vacuum sensor when the vacuum degree is increased to the upper limit of the vacuum degree of the vacuum sensor, and acquiring the second vacuum degree read by the controller.
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| CN201810242335.2A CN108896241B (en) | 2018-03-22 | 2018-03-22 | Vacuum degree detection system and method |
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| CN201810242335.2A CN108896241B (en) | 2018-03-22 | 2018-03-22 | Vacuum degree detection system and method |
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| CN108896241B true CN108896241B (en) | 2021-07-06 |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04204133A (en) * | 1990-11-30 | 1992-07-24 | Yokogawa Electric Corp | Calibrating device for reference vacuum gage |
| CN202442842U (en) * | 2012-02-09 | 2012-09-19 | 江苏东方航天校准检测有限公司 | Portable vacuum gauge calibrating device |
| CN102944357A (en) * | 2012-11-12 | 2013-02-27 | 中国航天科技集团公司第五研究院第五一〇研究所 | Device and method for calibrating vacuum gauge for work |
| CN203191151U (en) * | 2012-12-21 | 2013-09-11 | 黄鸣 | Vacuum gauge automatic calibrating device |
| CN103808457A (en) * | 2013-12-24 | 2014-05-21 | 兰州空间技术物理研究所 | Low-temperature vacuum calibration device and method |
| CN206269962U (en) * | 2016-12-02 | 2017-06-20 | 山东中检高科检测技术有限公司 | A kind of vacuum meter dynamic contrast calibrating installation |
-
2018
- 2018-03-22 CN CN201810242335.2A patent/CN108896241B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH04204133A (en) * | 1990-11-30 | 1992-07-24 | Yokogawa Electric Corp | Calibrating device for reference vacuum gage |
| CN202442842U (en) * | 2012-02-09 | 2012-09-19 | 江苏东方航天校准检测有限公司 | Portable vacuum gauge calibrating device |
| CN102944357A (en) * | 2012-11-12 | 2013-02-27 | 中国航天科技集团公司第五研究院第五一〇研究所 | Device and method for calibrating vacuum gauge for work |
| CN203191151U (en) * | 2012-12-21 | 2013-09-11 | 黄鸣 | Vacuum gauge automatic calibrating device |
| CN103808457A (en) * | 2013-12-24 | 2014-05-21 | 兰州空间技术物理研究所 | Low-temperature vacuum calibration device and method |
| CN206269962U (en) * | 2016-12-02 | 2017-06-20 | 山东中检高科检测技术有限公司 | A kind of vacuum meter dynamic contrast calibrating installation |
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Effective date of registration: 20230608 Address after: 518000 1507b, building 8, Qianhai excellence Financial Center (phase I), No. 5033, Menghai Avenue, Nanshan street, Qianhai Shenzhen Hong Kong cooperation zone, Shenzhen, Guangdong Province Patentee after: Shenzhen Dingli Software Technology Co.,Ltd. Address before: 523000 workshop of the second Southwest Industrial Zone, Dongfeng North Road, Shijie Town, Dongguan City, Guangdong Province Patentee before: DONGGUAN DINGLI AUTOMATION TECHNOLOGY Co.,Ltd. |
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