CN115855204A - Detection method and automatic detection device of piston type water meter detection device - Google Patents
Detection method and automatic detection device of piston type water meter detection device Download PDFInfo
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- CN115855204A CN115855204A CN202211462254.6A CN202211462254A CN115855204A CN 115855204 A CN115855204 A CN 115855204A CN 202211462254 A CN202211462254 A CN 202211462254A CN 115855204 A CN115855204 A CN 115855204A
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Abstract
The invention relates to a detection method of a piston type water meter calibrating device, which comprises the following steps: filling the piston cylinder with water, and emptying the pipe section; reading the initial value m of the electronic balance 1 (ii) a Setting a drainage volume V, and discharging the water from a water outlet to a container; reading the weighing indication value m of the electronic balance 2 (ii) a Inquiring the corresponding water density rho when the water temperature t is obtained through a preset water density table; by the formula V 1 ＝c(m 2 ‑m 1 ) Rho, obtaining the volume of water in the container; by the formula E 1 ＝(V‑V 1 )/V 1 Obtaining the test error; the piston cylinder continues to discharge water with the volume of V, and the test steps are repeated to obtain the indication error of each test section of the piston cylinder; repeatedly measuring the indicating value error of each test section of the piston cylinder, and obtaining the repeatability of the indicating value error; and judging whether the requirements of the regulations are met. The method ensures that the test result is more accurate and reliable, and realizes the automatic detection of the piston type water meter calibrating device.
Description
Technical Field
The invention relates to a detection method, in particular to a detection method and an automatic detection device of a piston type water meter detection device.
Background
The detection of the piston type water meter calibrating device at the present stage mainly depends on manual operation, including an electronic balance, water temperature reading and data recording, and a lot of data processing is also performed after the test, namely, the test site is inconvenient to give out a test result, so that the unqualified device cannot be timely adjusted to a state meeting the requirements; secondly, because the test data is numerous, the possibility of human error reading or recording exists; finally, during the test, the operation is basically repeated manually, so that the operation difference exists, and certain influence may be generated on the test result, so that the misjudgment is caused.
Disclosure of Invention
In order to solve the problems, the invention provides a detection method for a piston type water meter calibrating device, which can automatically detect the piston type water meter calibrating device and has accurate and reliable detection structure, and the specific technical scheme is as follows:
a detection method of a piston type water meter calibrating device comprises the following steps:
filling the piston cylinder with water and discharging air in the pipeline;
reading the initial value m of the electronic balance 1 ；
Setting a drainage volume V, and discharging the water from a water outlet to a container;
reading the weighing indication value m of the electronic balance 2 ；
Inquiring the corresponding water density rho when the water temperature t is reached through a preset water density table;
by the formula V 1 ＝c(m 2 -m 1 ) ρ obtaining the volume of water in the vessel, wherein V 1 Is a standard value of the volume discharged from the piston cylinder, and c is a buoyancy compensation coefficient;
by the formula E 1 ＝(V-V 1 )/V 1 Obtaining the test error;
the piston cylinder continues to discharge water with the volume of V, and the test steps are repeated to obtain the indication error of each test section of the piston cylinder;
repeatedly measuring the indicating value error of each test section of the piston cylinder according to the set requirement, and obtaining the repeatability of the indicating value error;
and judging whether the requirements of the regulations are met.
Preferably, the method further comprises the following steps:
after the indication error and repeatability detection is finished, a pressure transmitter is installed according to test requirements, a certain water pressure is applied to a piston cylinder, pressure signals collected by the pressure transmitter are monitored for pressure curve change, and the sealing performance of the piston type water meter calibrating device is obtained;
and judging whether the requirements of the regulations are met.
Preferably, the volume of the piston cylinder is at least more than 3V.
Preferably, in the test, when the water in the container reaches a certain amount limit, the drain valve is opened to drain, the drain valve is automatically closed after the water is drained, and simultaneously the reading change of the electronic balance is monitored.
Preferably, the method further comprises flow stability detection, when the flow stability is detected, a water outlet of the piston cylinder is connected with the turbine flowmeter, instantaneous flow of the turbine flowmeter within a period of time is collected under specified flow, and the flow stability of the piston type water meter calibrating device is calculated.
An automatic detection device of a piston type water meter calibrating device comprises: the piston cylinder is used for draining water; the container is used for storing water discharged by the piston cylinder; the electronic balance is arranged on the container; a temperature sensor mounted within the container for detecting a temperature of water within the container; the pressure transmitter is arranged on the piston cylinder and used for detecting the sealing performance of the piston type water meter calibrating device; the controller is respectively connected with the piston cylinder, the electronic balance, the temperature sensor and the pressure transmitter; and the upper computer is connected with the controller and used for processing the collected data and judging whether the collected data meets the requirements of the regulations or not according to the data.
Preferably, the method further comprises the following steps: and the turbine flowmeter is arranged at the water outlet of the piston cylinder, is connected with the upper computer and is used for detecting the stability of flow.
Compared with the prior art, the invention has the following beneficial effects:
1. the whole-process test software automatically acquires required data, and the method comprises the following steps: electronic balance readings, temperature sensor readings, pressure transmitter readings, and flow meter readings;
2. in each test section, when the software acquires the data of the temperature sensor, the corresponding water density in the database is automatically called out, and the corresponding volume is converted to obtain an indication error;
3. the testing software automatically controls the valve of the container, so that high repeatability in operation is ensured;
4. after each test section is finished, software obtains a test result according to a set algorithm, if the test result does not meet the requirement, the piston cylinder coefficient can be immediately adjusted, and the test is carried out again, so that the metering parameters of the device meet the relevant requirements;
5. the whole test process greatly reduces the influence brought by artificial reading or operation, so that the test result is more accurate and reliable, and the automatic detection of the piston type water meter device is realized.
Drawings
Fig. 1 is a detection device of a piston type water meter verification device;
FIG. 2 is pressure data for a piston cylinder;
fig. 3 is a schematic diagram of flow detection.
Detailed Description
The invention will now be further described with reference to the accompanying drawings.
This embodiment is used for realizing the automated inspection to piston water gauge calibrating installation. The device mainly comprises an electronic balance, a temperature sensor, a pressure transmitter, a turbine flowmeter, a high-precision standard timer, a computer, a solenoid valve switch, a container, a movable detection table and the like. Firstly, directly installing a pipeline with a pressure transmitter at a water meter position, starting a piston, closing a water outlet valve, and monitoring the water pressure change of a piston type water meter calibrating device through device testing software so as to test the tightness of the device; secondly, the device testing software can automatically read the indication value of the electronic balance and the water temperature through the temperature transmitter, and then the indication value error result is obtained according to the calculation formula; through the external pipe section, the turbine flowmeter is connected in series at the water meter detection position, and under the specified flow, the test software collects the instantaneous flow of the turbine flowmeter within a period of time so as to calculate the flow stability of the piston type water meter calibrating device. After the test is finished, the electronic original record and the certificate are generated according to the requirements, the influence caused by manual reading or operation is reduced in the whole process, and the automatic verification of the piston type water meter device is realized.
Example one
As shown in fig. 1 and 2, a method for detecting a piston-type water meter includes the following steps:
opening the piston cylinder to exhaust;
the test software reads the initial value m of the electronic balance 1 ；
Filling the piston cylinder with water, wherein the volume of the piston cylinder is at least more than 3V, setting the volume V of water to be drained from the water outlet to the container;
the test software reads the weighing indicating value m of the electronic balance 2 (ii) a Reading the water temperature t in the measuring device through a temperature sensor and test software;
software inquires the corresponding water density rho when the water temperature t is measured through a preset water density meter;
by the formula V 1 ＝c(m 2 -m 1 ) Rho, the volume of water in the container, i.e. the standard value V of the volume discharged from the piston cylinder 1 And c is a buoyancy compensation coefficient;
by the formula E 1 ＝(V-V 1 )/V 1 Obtaining the test error;
the piston cylinder continues to discharge water with the volume of V, and the test steps are repeated to obtain the indication error of each test section of the piston cylinder;
in the test, when the water in the container reaches a certain amount limit, the drain valve can be automatically opened, the drain valve can be automatically closed after the water is drained, and the test software can monitor the reading change of the electronic balance;
repeatedly measuring the indicating value error of each test section of the piston cylinder according to the set requirement, and obtaining the repeatability of the indicating value error;
after the indication error and repeatability detection is finished, a pressure transmitter is installed according to test requirements, a certain water pressure is applied to a piston cylinder, a pressure signal collected by the pressure transmitter is displayed in computer software through a conversion device, and the change of a pressure curve is monitored to obtain the tightness of the piston type water meter calibrating device;
after all data are collected, software processes according to the set processing method to obtain a test result and judge whether the test result meets the requirements of regulations.
Repeatedly measuring the indicating value error of each test section of the piston cylinder, and obtaining the repeatability of the indicating value error, wherein the test data are as follows:
the piston rod can adopt the piston cylinder of following producer:
the manufacturer: justur, model: PP 30S 7/15-20X 15SEMI.
The manufacturer: hangzhou Tianma measurement science and technology company, model: LHCS DN 15-DN 20.
As shown in fig. 3, the method further comprises flow stability detection, wherein during the flow stability detection, a water outlet of the piston cylinder is connected with the turbine flowmeter, and instantaneous flow of the turbine flowmeter within a period of time is collected under specified flow, so that the flow stability of the piston type water meter calibrating device is calculated.
Example two
A detection device of a piston type water meter comprises a piston cylinder 1, a container 2, an electronic balance 3, a temperature sensor 4, a pressure transmitter, a controller 5 and an upper computer 6, wherein the piston cylinder 1 is used for draining water and is connected with the container 2 through a drain pipe; the container 2 is used for storing water discharged by the piston cylinder 1; the container 2 is arranged on the electronic balance 3 and is provided with a drain valve 7; a temperature sensor 4 installed in the container 2 for detecting the temperature of water in the container 2; the pressure transmitter is arranged on the piston cylinder 1 and used for detecting the pressure inside the piston cylinder 1; the controller 5 is respectively connected with the piston cylinder 1, the electronic balance 3, the temperature sensor 4 and the pressure transmitter; the upper computer 6 is connected with the controller 5 and used for processing the collected data and judging whether the collected data meets the requirements of regulations or not according to the data.
As shown in fig. 3, the device also comprises a turbine flowmeter 8 when detecting the flow stability, wherein the turbine flowmeter 8 is installed at the water outlet of the piston cylinder 1 and is connected with the upper computer 6. The turbine flowmeter 8 is connected in series at the water meter detection position, and under the specified flow, the test software collects the instantaneous flow of the turbine flowmeter 8 within a period of time so as to calculate the flow stability of the piston type water meter calibrating device.
The technical principles of the present invention have been described above with reference to specific embodiments. The description is made for the purpose of illustrating the principles of the invention and should not be construed in any way as limiting the scope of the invention. Based on the explanations herein, those skilled in the art will be able to conceive of other embodiments of the present invention without inventive step, which shall fall within the scope of the appended claims.
Claims (7)
1. A detection method of a piston type water meter calibrating device is characterized by comprising the following steps:
filling the piston cylinder with water and exhausting air in the pipeline;
reading the initial value m of the electronic balance 1 ；
Setting a drainage volume V, and discharging the water from a water outlet to a container;
reading the weighing indication value m of the electronic balance 2 ；
Inquiring the corresponding water density rho when the water temperature t is obtained through a preset water density table;
by the formula V 1 ＝c(m 2 -m 1 ) ρ obtaining the volume of water in the vessel, wherein V 1 Is a standard value of the volume discharged from the piston cylinder, and c is a buoyancy compensation coefficient;
by the formula E 1 ＝(V-V 1 )/V 1 Obtaining the test error;
the piston cylinder continuously discharges water with the volume of V, and the test steps are repeated to obtain the indication value error of each test section of the piston cylinder;
repeatedly measuring the indicating value error of each test section of the piston cylinder according to the set requirement, and obtaining the repeatability of the indicating value error;
and judging whether the requirements of the regulations are met.
2. A method of testing a piston water meter verification device as claimed in claim 1, further comprising the steps of:
after the indication error and repeatability detection is finished, a pressure transmitter is installed according to test requirements, a certain water pressure is applied to a piston cylinder, pressure signals collected by the pressure transmitter are monitored for pressure curve change, and the tightness of the piston type water meter calibrating device is obtained;
and judging whether the requirements of the regulations are met.
3. A method of testing a piston water meter calibrating device according to claim 1,
the volume of the piston cylinder is at least more than 3V.
4. A method of testing a piston water meter calibrating device according to claim 1,
in the test, when the water in the container reaches a certain amount limit, the drain valve is opened to drain, the drain valve is automatically closed after the water is drained, and the reading change of the electronic balance is monitored.
5. A method of testing a piston water meter calibrating device according to claim 1,
the method is characterized by further comprising flow stability detection, wherein during flow stability detection, a water outlet of the piston cylinder is connected with the turbine flowmeter, instantaneous flow of the turbine flowmeter within a period of time is collected under specified flow, and the flow stability of the piston type water meter calibrating device is calculated.
6. The utility model provides a piston water gauge calibrating installation's automatic checkout device which characterized in that includes:
the piston cylinder is used for draining water;
the container is used for storing water discharged by the piston cylinder;
an electronic balance on which the container is mounted;
a temperature sensor mounted within the container for detecting a temperature of water within the container;
the pressure transmitter is arranged on the piston cylinder and is used for detecting the sealing performance of the piston type water meter calibrating device;
the controller is respectively connected with the piston cylinder, the electronic balance, the temperature sensor and the pressure transmitter; and
and the upper computer is connected with the controller and is used for processing the collected data and judging whether the collected data meets the regulation requirement or not according to the data.
7. An automatic detection device for a piston water meter verification device as claimed in claim 6, further comprising: and the turbine flowmeter is arranged at a water outlet of the piston cylinder, is connected with the upper computer and is used for detecting the stability of flow.
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| Application Number | Priority Date | Filing Date | Title |
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| CN202211462254.6A CN115855204A (en) | 2022-11-21 | 2022-11-21 | Detection method and automatic detection device of piston type water meter detection device |
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| CN202211462254.6A CN115855204A (en) | 2022-11-21 | 2022-11-21 | Detection method and automatic detection device of piston type water meter detection device |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116124256A (en) * | 2023-04-14 | 2023-05-16 | 宁德时代新能源科技股份有限公司 | Error detection and calibration method, apparatus and medium for gas flowmeter |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116124256A (en) * | 2023-04-14 | 2023-05-16 | 宁德时代新能源科技股份有限公司 | Error detection and calibration method, apparatus and medium for gas flowmeter |
| CN116124256B (en) * | 2023-04-14 | 2023-08-29 | 宁德时代新能源科技股份有限公司 | Error detection and calibration method, apparatus and medium for gas flowmeter |
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