CN112924087A - Automatic detection system of pressure transmitter - Google Patents
Automatic detection system of pressure transmitter Download PDFInfo
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- CN112924087A CN112924087A CN202110119639.1A CN202110119639A CN112924087A CN 112924087 A CN112924087 A CN 112924087A CN 202110119639 A CN202110119639 A CN 202110119639A CN 112924087 A CN112924087 A CN 112924087A
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- 238000001514 detection method Methods 0.000 title claims abstract description 73
- 239000007788 liquid Substances 0.000 claims abstract description 25
- 238000005259 measurement Methods 0.000 claims abstract description 13
- 238000012360 testing method Methods 0.000 claims description 14
- 230000007613 environmental effect Effects 0.000 claims description 2
- 230000007547 defect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 8
- 238000012795 verification Methods 0.000 description 7
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000009530 blood pressure measurement Methods 0.000 description 1
- 230000001419 dependent effect Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
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- 238000012544 monitoring process Methods 0.000 description 1
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L25/00—Testing or calibrating of apparatus for measuring force, torque, work, mechanical power, or mechanical efficiency
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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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Abstract
Pressure transmitter automatic check out system belongs to pressure transmitter detection area. The pressure transmitter calibration device solves the defects that the prior pressure transmitter measurement accuracy calibration needs manual calibration, and has low detection speed and low detection accuracy. The pressure source is used for simultaneously providing gas or liquid pressure for the standard detection meter and the detected pressure transmitter; the standard detection meter generates corresponding standard current according to the received gas or liquid pressure; the pressure transmitter to be measured generates corresponding current to be measured according to the received gas or liquid pressure; the data acquisition module is used for making a difference between the received standard current and the current to be measured, taking the absolute value of the difference as an error variable and sending the error variable to the report generation module; and the report generation module is used for calling a corresponding error reference range according to the received precision grade, comparing the error variable with the called error reference range, obtaining a detection result whether the pressure transmitter to be detected is qualified or not, and generating a detection report. The pressure transmitter detection device is mainly used for detecting the pressure transmitter.
Description
Technical Field
The invention belongs to the field of pressure transmitter detection.
Background
The pressure transmitter is a common instrument used for measuring and controlling pressure parameters in industrial processes in the industries of electric power, chemical industry and the like, and needs to be periodically checked according to relevant regulations in order to ensure the accuracy and reliability of monitoring parameters. The calibration of the pressure transmitter is manually operated in the past, and a calibrating person respectively calculates current standard values corresponding to different percentages of the measuring range according to the measuring range of the transmitter, compares the deviation of the current value output by the transmitter and the standard values in the calibration process and finally gives a report. The whole process is relatively complicated, is easy to make mistakes and is influenced by the level of verification personnel, so that a device capable of automatically, efficiently and precisely verifying the pressure transmitter is needed.
Disclosure of Invention
The invention aims to solve the defects that the existing pressure transmitter measurement accuracy verification needs manual verification, and has low detection speed and low detection accuracy.
The automatic detection system of the pressure transmitter comprises a pressure source 1, a standard detection table 2, an image acquisition module 3, a data acquisition module 4 and a report generation module 5;
the pressure source 1 is used for simultaneously providing a first gas or liquid pressure for the standard detection meter 2 and the detected pressure transmitter 7;
the standard detection table 2 generates corresponding standard current according to the received first gas or liquid pressure and sends the corresponding standard current to the data acquisition module 4;
the measured pressure transmitter 7 generates corresponding first current to be measured according to the received first gas or liquid pressure and transmits the first current to the data acquisition module 4;
the image acquisition module 3 is used for acquiring a manufacturer, a product name, a model, a measurement range, a factory number and a precision grade on a nameplate of the pressure transmitter 7 to be measured, and sending the data to the report generation module 5 through the data acquisition module 4;
the data acquisition module 4 is used for sending the received standard current and the first current to be measured to the report generation module 5; the current measuring device is also used for subtracting the received standard current from the first current to be measured, and the absolute value of the difference is used as an error variable and is sent to the report generating module 5;
the report generating module 5 is used for storing the error reference range under each precision grade;
the report generation module 5 is further configured to invoke a corresponding error reference range according to the received precision level, and compare the error variable with the invoked error reference range to obtain a detection result of whether the pressure transmitter 7 to be detected is qualified; and generating a detection report according to the detection result of the pressure transmitter 7 to be detected, the standard current, the first current to be detected, the manufacturer, the product name, the model, the measurement range, the factory number and the precision grade on the nameplate of the pressure transmitter 7 to be detected.
Preferably, the report generating module 5 compares the error variable with the called error reference range to obtain the detection result of whether the measured pressure transmitter 7 is qualified or not by the following implementation manner:
when the error variable is within the called error reference range, judging that the detected pressure transmitter 7 is qualified for detection;
and when the error variable is out of the called error reference range, judging that the detected pressure transmitter 7 is unqualified.
Preferably, the automatic detection system of the pressure transmitter further comprises an environment detection instrument 6;
the environment detection instrument 6 is used for detecting the atmospheric pressure, temperature and humidity of the test environment and sending the atmospheric pressure, temperature and humidity to the report generation module 5 through the data acquisition module 4;
and the report generating module 5 is used for generating a detection report according to the received atmospheric pressure, temperature and humidity of the test environment.
Preferably, the image acquisition module 3 is implemented by a high-definition camera.
Preferably, the automatic detection system is also used for measuring the pressure range of the pressure transmitter 7 to be measured; the implementation mode of measuring the pressure range of the measured pressure transmitter 7 by the automatic detection system is as follows:
the pressure source 1 provides a second gas or liquid pressure for the pressure transmitter 7 to be measured according to the received pressure measuring range measurement given command; the measured pressure transmitter 7 generates corresponding second current to be measured according to the received second gas or liquid pressure, and transmits the second gas or liquid pressure and the second current to be measured to the report generating module 5 through the data acquisition module 4;
and the report generating module 5 is used for obtaining a linear equation according to the linear relationship between the second gas or liquid pressure and the corresponding second current to be measured and the linear relationship between the current of the corresponding pressure transmitter 7 to be measured and 4mA when the pressure is 0, and substituting the current of 20mA into the obtained linear equation, so as to obtain the pressure measuring range of the pressure transmitter 7 to be measured and generate a detection report.
The invention has the following beneficial effects: on one hand, the automatic detection system of the pressure transmitter adopts the image recognition technology to obtain the related information on the transmitter identifier, thereby reducing the workload of manual input; on the other hand, whether the pressure transmitter to be detected is qualified is determined by comparing the collected current to be detected with the standard current, the verification precision of the measurement precision of the pressure transmitter to be detected is high, a corresponding detection report is automatically generated, the whole detection process does not need manual participation, automatic identification and judgment are realized, the detection process is simple and convenient to realize, the intelligent degree is high, and the verification precision is high.
Drawings
FIG. 1 is a schematic diagram of an automatic detection system for a pressure transmitter according to the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that the embodiments and features of the embodiments may be combined with each other without conflict.
Referring to fig. 1, the automatic detection system of a pressure transmitter according to the present embodiment is described, and includes a pressure source 1, a standard detection table 2, an image acquisition module 3, a data acquisition module 4, and a report generation module 5;
the pressure source 1 is used for simultaneously providing a first gas or liquid pressure for the standard detection meter 2 and the detected pressure transmitter 7;
the standard detection table 2 generates corresponding standard current according to the received first gas or liquid pressure and sends the corresponding standard current to the data acquisition module 4;
the measured pressure transmitter 7 generates corresponding first current to be measured according to the received first gas or liquid pressure and transmits the first current to the data acquisition module 4;
the image acquisition module 3 is used for acquiring a manufacturer, a product name, a model, a measurement range, a factory number and a precision grade on a nameplate of the pressure transmitter 7 to be measured, and sending the data to the report generation module 5 through the data acquisition module 4;
the data acquisition module 4 is used for sending the received standard current and the first current to be measured to the report generation module 5; the current measuring device is also used for subtracting the received standard current from the first current to be measured, and the absolute value of the difference is used as an error variable and is sent to the report generating module 5;
the report generating module 5 is used for storing the error reference range under each precision grade;
the report generation module 5 is further configured to invoke a corresponding error reference range according to the received precision level, and compare the error variable with the invoked error reference range to obtain a detection result of whether the pressure transmitter 7 to be detected is qualified; and generating a detection report according to the detection result of the pressure transmitter 7 to be detected, the standard current, the first current to be detected, the manufacturer, the product name, the model, the measurement range, the factory number and the precision grade on the nameplate of the pressure transmitter 7 to be detected.
On one hand, the automatic detection system of the pressure transmitter adopts the image recognition technology to obtain the related information on the transmitter identifier and reduce the workload of manual input; on the other hand, whether the measured pressure transmitter 7 is qualified or not is determined by comparing the collected current to be measured with the standard current, the verification precision of the measurement precision of the measured pressure transmitter 7 is high, a corresponding detection report is automatically generated, the whole detection process does not need manual participation, automatic identification and judgment are realized, the detection process is simple, the realization is convenient, the intelligent degree is high, and the verification precision is high.
When the pressure source is used specifically, the pressure source 1 is used for providing a first gas pressure or a first liquid pressure for the standard detection meter 2 and the detected pressure transmitter 7 simultaneously; when the pressure source 1 gradually increases the pressure to a preset pressure value according to a system instruction, the standard detection table 2 and the pressure value received by the pressure transmitter 7 to be detected are the same, and after the pressure value is stabilized for 3 minutes, the output current values of the standard detection table 2 and the pressure transmitter 7 to be detected are recorded.
Before the pressure transmitter automatic detection system is used, firstly, whether the pressure transmitter 7 to be detected is reliably connected or not is checked, and whether leakage exists in physical connection or not is judged, wherein the method comprises the following specific steps: stopping after a small amount of pressurization is carried out for 20kPa, judging that no leakage exists or the pressure drop per minute is less than 20Pa, and judging that no leakage exists; judging whether the electrical connection is correct or not, and the specific method comprises the following steps: after a small amount of pressurization, the output current of the transmitter is increased in the positive direction, and then the wiring is correct. If the connection is checked to be in good condition, the next step is carried out, otherwise, an alarm can be sent out to prompt the transmitter to be reconnected.
Further, referring specifically to fig. 1, the report generation module 5 compares the error variable with the called error reference range, and obtains the detection result of whether the detected pressure transmitter 7 is qualified according to the following implementation manner:
when the error variable is within the called error reference range, judging that the detected pressure transmitter 7 is qualified for detection;
and when the error variable is out of the called error reference range, judging that the detected pressure transmitter 7 is unqualified.
Further, with particular reference to fig. 1, the automatic detection system further comprises an environmental test meter 6;
the environment detection instrument 6 is used for detecting the atmospheric pressure, temperature and humidity of the test environment and sending the atmospheric pressure, temperature and humidity to the report generation module 5 through the data acquisition module 4;
and the report generating module 5 is used for generating a detection report according to the received atmospheric pressure, temperature and humidity of the test environment.
In the present embodiment, the environment detection instrument 6 is added to obtain information related to the detection environment of the pressure transmitter 7 to be detected.
Further, referring to fig. 1 specifically, the image capturing module 3 is implemented by using a high-definition camera.
Further, referring specifically to fig. 1, the automatic detection system is also used for measuring the pressure measurement range of the pressure transmitter 7 to be measured; the implementation mode of measuring the pressure range of the measured pressure transmitter 7 by the automatic detection system is as follows:
the pressure source 1 provides a second gas or liquid pressure for the pressure transmitter 7 to be measured according to the received pressure measuring range measurement given command; the measured pressure transmitter 7 generates corresponding second current to be measured according to the received second gas or liquid pressure, and transmits the second gas or liquid pressure and the second current to be measured to the report generating module 5 through the data acquisition module 4;
and the report generating module 5 is used for obtaining a linear equation according to the linear relationship between the second gas or liquid pressure and the corresponding second current to be measured and the linear relationship between the current of the corresponding pressure transmitter 7 to be measured and 4mA when the pressure is 0, and substituting the current of 20mA into the obtained linear equation, so as to obtain the pressure measuring range of the pressure transmitter 7 to be measured and generate a detection report.
In the preferred embodiment, the pressure source 1 provides a second gas pressure or a second fluid pressure to the measured pressure transmitter 7.
Although the invention herein has been described with reference to particular embodiments, it is to be understood that these embodiments are merely illustrative of the principles and applications of the present invention. It is therefore to be understood that numerous modifications may be made to the illustrative embodiments and that other arrangements may be devised without departing from the spirit and scope of the present invention as defined by the appended claims. It should be understood that features described in different dependent claims and herein may be combined in ways different from those described in the original claims. It is also to be understood that features described in connection with individual embodiments may be used in other described embodiments.
Claims (5)
1. The automatic detection system of the pressure transmitter is characterized by comprising a pressure source (1), a standard detection meter (2), an image acquisition module (3), a data acquisition module (4) and a report generation module (5);
the pressure source (1) is used for simultaneously providing a first gas or liquid pressure for the standard detection meter (2) and the detected pressure transmitter (7);
the standard detection table (2) generates corresponding standard current according to the received first gas or liquid pressure and sends the corresponding standard current to the data acquisition module (4);
the measured pressure transmitter (7) generates corresponding first current to be measured according to the received first gas or liquid pressure and transmits the first current to the data acquisition module (4);
the image acquisition module (3) is used for acquiring the manufacturer, the product name, the model, the measurement range, the factory number and the precision grade on the nameplate of the pressure transmitter (7) to be measured and sending the data to the report generation module (5) through the data acquisition module (4);
the data acquisition module (4) is used for sending the received standard current and the first current to be measured to the report generation module (5); the current detection device is also used for subtracting the received standard current from the first current to be detected, and the absolute value of the difference value is used as an error variable and is sent to a report generation module (5);
the report generating module (5) is used for storing the error reference range under each precision level;
the report generation module (5) is also used for calling a corresponding error reference range according to the received precision grade, comparing the error variable with the called error reference range and obtaining the detection result whether the pressure transmitter (7) to be detected is qualified or not; and generating a detection report according to the detection result of the pressure transmitter (7), the standard current, the first current to be detected, the manufacturer, the product name, the model, the measurement range, the factory number and the precision grade on the nameplate of the pressure transmitter (7).
2. The automatic pressure transmitter test system according to claim 1, wherein the report generation module (5) compares the error variable with the called error reference range to obtain a test result of whether the tested pressure transmitter (7) is qualified by:
when the error variable is within the called error reference range, judging that the detected pressure transmitter (7) is qualified in detection;
and when the error variable is out of the called error reference range, judging that the detected pressure transmitter (7) is unqualified.
3. The automatic pressure transmitter testing system of claim 1, further comprising an environmental test meter (6);
the environment detection instrument (6) is used for detecting the atmospheric pressure, temperature and humidity of the test environment and sending the atmospheric pressure, temperature and humidity to the report generation module (5) through the data acquisition module (4);
and the report generation module (5) is used for generating a detection report according to the received atmospheric pressure, temperature and humidity of the test environment.
4. The automatic pressure transmitter detection system according to claim 1, wherein the image acquisition module (3) is implemented by a high-definition camera.
5. The automatic pressure transmitter testing system of claim 1, wherein the automatic testing system is further configured to measure a pressure range of the pressure transmitter (7) under test; the realization mode that the automatic detection system measures the pressure range of the pressure transmitter (7) to be detected is as follows:
the pressure source (1) provides a second gas or liquid pressure for the pressure transmitter (7) to be measured according to the received pressure measuring range measurement given command; the measured pressure transmitter (7) generates corresponding second current to be measured according to the received second gas or liquid pressure, and transmits the second gas or liquid pressure and the second current to be measured to the report generating module (5) through the data acquisition module (4);
and the report generating module (5) is used for obtaining a linear equation according to the linear relationship between the second gas or liquid pressure and the corresponding second current to be measured and the linear relationship between the current of the corresponding pressure transmitter (7) to be measured and 4mA when the pressure is 0, substituting the current of 20mA into the obtained linear equation, thus obtaining the pressure measuring range of the pressure transmitter (7) to be measured and generating a detection report.
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| CN202110119639.1A CN112924087A (en) | 2021-01-28 | 2021-01-28 | Automatic detection system of pressure transmitter |
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| CN202110119639.1A CN112924087A (en) | 2021-01-28 | 2021-01-28 | Automatic detection system of pressure transmitter |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113504005A (en) * | 2021-07-13 | 2021-10-15 | 武汉飞恩微电子有限公司 | Calibration method, device and equipment of pressure sensor and storage medium |
| CN114441092A (en) * | 2022-02-10 | 2022-05-06 | 杭州和利时自动化有限公司 | Pressure transmitter calibration and inspection method, system and device and storage medium |
| CN116448314A (en) * | 2023-06-12 | 2023-07-18 | 乐山市计量测试所 | Independent pressure source and pressure gauge online detection method |
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2021
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| CN113504005A (en) * | 2021-07-13 | 2021-10-15 | 武汉飞恩微电子有限公司 | Calibration method, device and equipment of pressure sensor and storage medium |
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