CN109975738B - Electronic water meter calibration method and calibration device - Google Patents
Electronic water meter calibration method and calibration device Download PDFInfo
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- CN109975738B CN109975738B CN201910218177.1A CN201910218177A CN109975738B CN 109975738 B CN109975738 B CN 109975738B CN 201910218177 A CN201910218177 A CN 201910218177A CN 109975738 B CN109975738 B CN 109975738B
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R35/00—Testing or calibrating of apparatus covered by the other groups of this subclass
- G01R35/04—Testing or calibrating of apparatus covered by the other groups of this subclass of instruments for measuring time integral of power or current
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- G—PHYSICS
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- G08C—TRANSMISSION SYSTEMS FOR MEASURED VALUES, CONTROL OR SIMILAR SIGNALS
- G08C17/00—Arrangements for transmitting signals characterised by the use of a wireless electrical link
Abstract
The invention relates to a calibration method and a calibration device of an electronic water meter, the calibration method of the electronic water meter comprises S1, setting the preset water flow through the water meter, and receiving a first instruction sent by a user unit after the preset water flow; s2, analyzing the first instruction to obtain a first identification code of the first instruction, and obtaining the measured water quantity of the water meter water quantity sensor according to the first identification code; s3, generating a second instruction according to the first instruction and sending the second instruction to the user unit; and S4, the user unit analyzes the second instruction to obtain a second identification code of the user unit, and obtains the measured water quantity according to the second identification code to obtain the error of the water meter. The method and the device can simplify the water meter calibration process and improve the water meter calibration precision.
Description
Technical Field
The invention relates to the technical field of water meter calibration, in particular to an electronic water meter calibration method and a calibration device.
Background
In a conventional water meter calibration process, a specified amount of water is usually run on a calibration stand of the water meter, and the flow rate of the water meter displayed on the water meter is checked, and the error of the water meter is calculated by the difference between the two readings. The calculation process needs manual table lookup calculation, the process is complex, and the precision is difficult to guarantee.
Disclosure of Invention
The present invention provides a method and a device for calibrating an electronic water meter, aiming at the above-mentioned defects in the prior art.
The technical scheme adopted by the invention for solving the technical problems is as follows: the method for calibrating the electronic water meter comprises the following steps:
s1, setting a preset water flow through the water meter, and receiving a first instruction sent by the user unit after the preset water flow;
s2, analyzing the first instruction to obtain a first identification code of the first instruction, and obtaining the measured water quantity of the water meter water quantity sensor according to the first identification code;
s3, generating a second instruction according to the first instruction and sending the second instruction to the user unit;
and S4, the subscriber unit analyzes the second instruction to obtain a second identification code of the second instruction, and obtains the measured water quantity according to the second identification code to obtain the error of the water meter.
Preferably, the first and second electrodes are formed of a metal,
the first instruction and the second instruction both meet CJT-188 protocol, and the first identification code comprises a downlink control code arranged at byte 9 and first instruction data arranged at bytes 11-13;
the generating a second instruction according to the first instruction comprises:
adding BCD code data corresponding to the measured water amount in the first instruction data to form second instruction data, and modifying the downlink control code into a first uplink control code to generate a second instruction; the second identification code comprises the first uplink control code and the second instruction data;
the method further comprises the following steps:
and the user unit returns the water meter error according to the first uplink control code and the second instruction data.
Preferably, the first and second electrodes are formed of a metal,
the downlink control code is 0X01, and the data identifier in the first instruction data is 0X 9010;
the first uplink control code is 0X81, and the BCD code data is the last 4 bytes in the second instruction data.
Preferably, the BCD code data includes an integer bit and a decimal bit, and of the 4 bytes, the first 2.5 bytes are the decimal bit, and the last 1.5 bytes are the integer bit.
Preferably, the first and second electrodes are formed of a metal,
the generating a second instruction according to the first instruction further comprises:
before the BCD code data is added to the first instruction data, judging the state of the water meter, and modifying the downlink control code into a second uplink control code when the state of the water meter is abnormal to generate a second instruction; the second identification code comprises the second uplink control code;
the method further comprises the following steps:
and the user unit returns a default value according to the second uplink control code.
Preferably, the second uplink control code is 0XC 1.
The invention also constructs an electronic water meter calibration device, which comprises a preset water quantity setting unit, a user unit, a water quantity sensor and a control unit;
the preset water quantity setting unit is used for setting the preset water quantity flowing through the water meter;
the water quantity sensor is used for acquiring the measured water quantity when the preset water quantity flows through;
the user unit is used for sending a first instruction
The control unit is used for receiving the first instruction after the preset water quantity flows through the water meter, analyzing the first instruction to obtain a first identification code, and obtaining the measured water quantity according to the first identification code;
the control unit is also used for generating a second instruction according to the first instruction and sending the second instruction to the user unit;
and the user unit is also used for receiving and analyzing the second instruction to obtain a second identification code of the user unit, obtaining the measured water quantity according to the second identification code, and obtaining the error of the water meter according to the preset water quantity.
Preferably, the control unit includes a first generation unit;
the first generation unit is configured to add BCD code data corresponding to the measured water amount to first instruction data of the first instruction to form second instruction data, and modify a downlink control code of the first instruction to be a first uplink control code to generate the second instruction;
and the user unit returns the water meter error according to the first uplink control code and the second instruction data.
Preferably, the control unit includes a judgment unit and a second generation unit;
the judging unit is used for judging the state of the water meter before the BCD code data is added into the first instruction data;
the second generating unit is used for modifying the downlink control code into a second uplink control code when the state of the water meter is abnormal so as to generate a second instruction;
and the user unit is used for returning a default value according to the second uplink control code.
Preferably, the electronic water meter calibration device further comprises a display unit connected with the control unit, and the display unit is used for displaying the measured water amount.
The implementation of the electronic water meter calibration method and the electronic water meter calibration device has the following beneficial effects: the water meter calibration process can be simplified, and the water meter calibration precision is improved.
Drawings
The invention will be further described with reference to the accompanying drawings and examples, in which:
fig. 1 is a flowchart illustrating a first embodiment of a method for calibrating an electronic water meter according to the present invention;
FIG. 2 is a flowchart illustrating a second embodiment of a method for calibrating an electronic water meter according to the present invention;
FIG. 3 is a flowchart illustrating a third embodiment of a method for calibrating an electronic water meter according to the present invention;
fig. 4 is a functional block diagram of an electronic water meter calibration apparatus according to an embodiment of the present invention.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
As shown in fig. 1, in a first embodiment of the electronic water meter calibration method of the present invention, the method includes the following steps:
s1, setting the preset water flow through the water meter, and receiving a first instruction sent by the user unit after the preset water flow; specifically, the preset water amount meeting the requirement flows through the water meter through presetting, and after the preset water amount completely flows through the water meter, a first instruction sent by a user through a user unit is received, wherein the user unit can be a mobile phone or a computer of the user.
S2, analyzing the first instruction to obtain a first identification code of the first instruction, and obtaining the measured water quantity of the water meter water quantity sensor according to the first identification code; specifically, the first instruction is analyzed, the first identification code is obtained from the first instruction, the calibration process corresponding to the first identification code can be understood, and after the first identification code corresponding to the calibration process is obtained, the measured water amount of the water meter water amount sensor starts to be obtained.
S3, generating a second instruction according to the first instruction and sending the second instruction to the user unit; specifically, after the measured water amount of the water meter water amount sensor is obtained, the first instruction is modified according to the measured water amount, a second instruction carrying information of the measured water amount is generated, and the second instruction is sent to the user unit.
And S4, the user unit analyzes the second instruction to obtain a second identification code of the user unit, and obtains the measured water quantity according to the second identification code to obtain the error of the water meter. Specifically, after the user unit obtains the second instruction, the user unit analyzes the second instruction, obtains the first identification code therein, obtains the measurement water volume carried therein, and finally obtains the error of the water meter according to the measurement water volume.
Furthermore, the first instruction and the second instruction both meet CJT-188 protocol, the first identification code comprises a downlink control code arranged at byte 9 and first instruction data arranged at bytes 11-13; in the embodiment shown in FIG. 2, generating the second instruction based on the first instruction, on the basis of the above, comprises: s31, adding BCD code data corresponding to the measured water amount in the first instruction data to form second instruction data, and modifying the downlink control code into a first uplink control code to generate a second instruction; the second identification code comprises a first uplink control code and second instruction data; the method further comprises the following steps: and S41, the user unit returns the water meter error according to the first uplink control code and the second instruction data. Specifically, the protocol followed by the first instruction and the second instruction may be a common CJT-188 protocol, and the first identification code in the first instruction is defined on the basis of satisfying the protocol, where the first identification code includes a downlink control code at byte 9 and first instruction data at bytes 11-13. Wherein in step S3, generating the second instruction according to the first instruction includes: and on the basis of the above, the user unit can obtain the measured water quantity according to the first uplink control code and the second instruction data in the second instruction, and simultaneously returns the error of the water meter according to the measured water quantity.
Further, the downlink control code is 0X01, and the data in the first instruction data is identified as 0X 9010; the first up control code is 0X81, and the BCD code data is the last 4 bytes in the second instruction data. Specifically, on the basis of the above, the specific downlink control code is 0X01, where the first instruction data identifier is 0X9010, that is, when the control code and the data identifier are acquired in the calibration process, a calibration reading is performed. And simultaneously, responding to the first instruction, adding corresponding return data and adding a first uplink control code which embodies a response result.
Further, the BCD code data includes integer bits and decimal bits, and of the 4 bytes, the first 2.5 bytes are decimal bits, and the last 1.5 bytes are integer bits. Specifically, the BCD code data corresponding to the water amount measured by the water meter includes an integer number and a decimal number of the water amount measured by the water meter, and it can be understood that, in the BCD code data of 4 bytes, the corresponding relationship between the BCD code data and the integer number and the decimal number is defined respectively as required. The specific definition can adopt the first 2.5 bytes as decimal digits and the second 1.5 bytes as integer digits.
Further, in the embodiment shown in fig. 3, generating the second instruction according to the first instruction further includes: s32, before BCD code data are added to the first instruction data, the state of the water meter is judged, and when the state of the water meter is abnormal, the downlink control code is modified into a second uplink control code to generate a second instruction; the second identification code comprises a second uplink control code; the method further comprises the following steps: and S42, the user unit returns the default value according to the second uplink control code. Specifically, when the second instruction is generated according to the first instruction, namely, before BCD code data is added to the first instruction data, the state of the water meter is judged, generally, when the state of the water meter is normal, BCD code data is added, and the first uplink control code is generated. And in the judging process, the state of the water meter is found to be abnormal, the calibration of the water meter does not have reference significance at the moment, the downlink control code in the first instruction is modified into a second uplink control code, and meanwhile, the BCD code data can not be increased any more to generate a second instruction. And when the subscriber unit receives the second instruction, identifying the second uplink control code therein, and returning a default value at this time, where the default value may be understood as an identification code representing an abnormal state, and may also be a value representing that the calibration result is invalid, such as a maximum value or a minimum value.
Further, the second uplink control code is 0XC 1. Specifically, according to the above definition of the first instruction and the second instruction, here, the second uplink control code is set to 0XC 1.
The following is a specific example of an instruction in the calibration process, defining the frame format of CJT-188 instruction that meets the standard, the frame format of the first instruction:
| byte(s) | Code | Description of the invention |
| 0 | 68h | Frame start symbol |
| 1 | T | Meter type code |
| 2-8 | A0-A6 | Address of meter |
| 9 | 01h | CTR_0 |
| 10 | 03h | Data field length L |
| 11-12 | 9010h | Data identification DI0-DI1 |
| 13 | SER | Serial number (00h) |
| 14 | CS | Check code |
| 15 | 16h | End of frame symbol |
Frame format of the second instruction:
| byte(s) | Code | Description of the invention |
| 0 | 68h | Frame start symbol |
| 1 | T | Meter type code |
| 2-8 | A0-A6 | Address of meter |
| 9 | 81h | CTR_1 |
| 10 | L | Data field length |
| 11-12 | 9010 | Data identification DI0-DI1 |
| 13 | SER | Serial number (00h) |
| 14-17 | CURDATA | Current cumulative flow |
| 18 | CS | Check code |
| 19 | 16h | End of frame symbol |
Specific embodiments of the first instruction:
Data1：FE FE FE 68 10 12 00 00 00 00 00 00 01 03 90 10 00 2E 16
the first instruction specifies: FE FE FE is a guide character; 68 is a frame start; 10 is a meter type; 12000000000000 is a table address; 01 is a control code; 03 is the data field length; 9010 is a data identifier; 00 is a serial number; 2E is a check code; and 16 is a frame end.
Specific embodiments of the second instruction:
Data2：FE FE FE 68 10 12 00 00 00 00 00 00 81 07 90 10 00 56 34 12 00 4E 16。
the second instruction specifies: FE FE FE is a guide character; 68 is a frame start; 10 is a meter type; 12000000000000 is a table address; 81 is a control code; 07 is the data field length; 9010 is a data identifier; 00 is a serial number; 56341200 return data for the table; 4E is a check code; and 16 is a frame end. Wherein 81 is the first downlink control code, the returned data is the BCD code, which is 56341200, and the measured quantity is 1.23456 cubes. And the user unit can calculate to obtain the final water meter calibration data by obtaining the data.
In addition, as shown in the embodiment shown in fig. 4, the electronic water meter calibration apparatus of the present invention includes a preset water amount setting unit 40, a user unit 10, a water amount sensor 30 and a control unit 20;
the preset water amount setting unit 40 is used for setting the preset water amount flowing through the water meter;
the water amount sensor 30 is used to acquire the measured water amount when a preset water amount flows;
the subscriber unit 10 is arranged to send a first instruction
The control unit 20 is configured to receive a first instruction after a preset amount of water flows through the water meter, parse the first instruction to obtain a first identification code, and obtain a measured amount of water according to the first identification code;
the control unit 20 is further configured to generate a second instruction according to the first instruction, and send the second instruction to the user unit;
the subscriber unit 10 is further configured to receive and parse the second instruction to obtain a second identification code thereof, obtain the measured water volume according to the second identification code, and obtain the error of the water meter according to the preset water volume.
Specifically, in the calibration device, a preset water amount flowing through the water meter is set by the preset water amount setting unit 40, and after the preset water amount flows through, the measured water amount flowing through the preset water amount is obtained by the water amount sensor 30, the user unit sends a first instruction, the control unit 20 receives the first instruction after the preset water amount flows through, analyzes the first instruction, obtains a first identification code from the first instruction, can understand that the first identification code corresponds to the calibration process, and starts to obtain the measured water amount of the water meter water amount sensor after obtaining the first identification code corresponding to the calibration process. And after the control unit acquires the measured water quantity of the water meter water quantity sensor, the control unit modifies the first instruction according to the measured water quantity, generates a second instruction carrying the information of the measured water quantity, and sends the second instruction to the user unit. After the user unit obtains the second instruction, the user unit analyzes the second instruction, obtains the first identification code in the second instruction, obtains the measurement water volume carried in the second instruction, and finally obtains the error of the water meter according to the measurement water volume.
Further, the control unit 20 includes a first generation unit; the first generation unit is used for adding BCD code data corresponding to the measured water quantity in first instruction data of the first instruction to form second instruction data, modifying a downlink control code of the first instruction into a first uplink control code and generating a second instruction; the subscriber unit 10 returns a meter error based on the first uplink control code and the second command data. Specifically, the control unit adds BCD code data corresponding to the measured water amount in the first instruction data through the first generation unit to form second instruction data, meanwhile, the downlink control code is modified into the first uplink control code, meanwhile, calculation of some check bits is carried out again according to a protocol instruction generation mode, so that the second instruction data is formed, and meanwhile, on the basis of the above, the user unit can obtain the measured water amount according to the first uplink control code and the second instruction data in the second instruction, and meanwhile, the water meter error is returned according to the measured water amount. The first and second instructions specified herein may be as described above.
Further, the control unit 20 includes a judgment unit and a second generation unit; the judging unit is used for judging the state of the water meter before BCD code data is added in the first instruction data; the second generation unit is used for modifying the downlink control code into a second uplink control code when the state of the water meter is abnormal so as to generate a second instruction; and the user unit is used for returning a default value according to the second uplink control code. Specifically, the control unit 20 determines the state of the water meter through the determination unit, generally adds BCD code data when the state of the water meter is normal, and generates a first uplink control code. And in the judging process, the state of the water meter is found to be abnormal, the calibration of the water meter does not have reference significance at the moment, the downlink control code in the first instruction is modified into a second uplink control code, and meanwhile, the BCD code data can not be increased any more to generate a second instruction. When receiving the second instruction, the subscriber unit 10 identifies the second uplink control code therein, and returns a default value at this time, where the default value may be an identification code representing an abnormal state, or may be a value representing that the calibration result is invalid, such as a maximum value or a minimum value.
Further, the electronic water meter calibration device of the present invention further includes a display unit 50 connected to the control unit 20, wherein the display unit 50 is used for displaying the measured water amount. Specifically, the measured water amount may be directly displayed by the display unit 50, or the error of the water meter may be displayed.
It is to be understood that the foregoing examples, while indicating the preferred embodiments of the invention, are given by way of illustration and description, and are not to be construed as limiting the scope of the invention; it should be noted that, for those skilled in the art, the above technical features can be freely combined, and several changes and modifications can be made without departing from the concept of the present invention, which all belong to the protection scope of the present invention; therefore, all equivalent changes and modifications made within the scope of the claims of the present invention should be covered by the claims of the present invention.
Claims (8)
1. An electronic water meter calibration method is characterized by comprising the following steps:
s1, setting a preset water flow through the water meter, and receiving a first instruction sent by the user unit after the preset water flow;
s2, analyzing the first instruction to obtain a first identification code of the first instruction, and obtaining the measured water quantity of the water meter water quantity sensor according to the first identification code;
s3, generating a second instruction according to the first instruction and sending the second instruction to the user unit;
s4, the user unit analyzes the second instruction to obtain a second identification code of the user unit, and obtains the measured water quantity according to the second identification code to obtain a water meter error;
the first instruction and the second instruction both meet CJT-188 protocol, and the first identification code comprises a downlink control code arranged at byte 9 and first instruction data arranged at bytes 11-13;
the generating a second instruction according to the first instruction comprises:
adding BCD code data corresponding to the measured water amount in the first instruction data to form second instruction data, and modifying the downlink control code into a first uplink control code to generate a second instruction; the second identification code comprises the first uplink control code and the second instruction data;
the method further comprises the following steps:
and the user unit returns the water meter error according to the first uplink control code and the second instruction data.
2. The method of calibrating an electronic water meter recited in claim 1,
the downlink control code is 0X01, and the data identifier in the first instruction data is 0X 9010;
the first uplink control code is 0X81, and the BCD code data is the last 4 bytes in the second instruction data.
3. The method of calibrating an electronic water meter recited in claim 2, wherein said BCD code data includes an integer number and a decimal place, and of said 4 bytes, the first 2.5 bytes are said decimal place, and the last 1.5 bytes are said integer number.
4. The method of calibrating an electronic water meter recited in claim 1,
the generating a second instruction according to the first instruction further comprises:
before the BCD code data is added to the first instruction data, judging the state of the water meter, and modifying the downlink control code into a second uplink control code when the state of the water meter is abnormal to generate a second instruction; the second identification code comprises the second uplink control code;
the method further comprises the following steps:
and the user unit returns a default value according to the second uplink control code.
5. The method of calibrating an electronic water meter as set forth in claim 4, wherein said second uplink control code is 0XC 1.
6. An electronic water meter calibration device is characterized by comprising a preset water quantity setting unit, a user unit, a water quantity sensor and a control unit;
the preset water quantity setting unit is used for setting the preset water quantity flowing through the water meter;
the water quantity sensor is used for acquiring the measured water quantity when the preset water quantity flows through;
the user unit is used for sending a first instruction
The control unit is used for receiving the first instruction after the preset water quantity flows through the water meter, analyzing the first instruction to obtain a first identification code, and obtaining the measured water quantity according to the first identification code;
the control unit is also used for generating a second instruction according to the first instruction and sending the second instruction to the user unit;
the user unit is also used for receiving and analyzing the second instruction to obtain a second identification code of the user unit, obtaining the measured water quantity according to the second identification code, and obtaining a water meter error according to the preset water quantity;
the control unit comprises a first generation unit;
the first generation unit is configured to add BCD code data corresponding to the measured water amount to first instruction data of the first instruction to form second instruction data, and modify a downlink control code of the first instruction to be a first uplink control code to generate the second instruction; the first instruction and the second instruction both meet CJT-188 protocol, and the first identification code comprises a downlink control code arranged at byte 9 and first instruction data arranged at bytes 11-13; the second identification code comprises the first uplink control code and the second instruction data;
and the user unit returns the water meter error according to the first uplink control code and the second instruction data.
7. The electronic water meter calibration device of claim 6, wherein the control unit comprises a judgment unit and a second generation unit;
the judging unit is used for judging the state of the water meter before the BCD code data is added into the first instruction data;
the second generating unit is used for modifying the downlink control code into a second uplink control code when the state of the water meter is abnormal so as to generate a second instruction;
and the user unit is used for returning a default value according to the second uplink control code.
8. The electronic water meter calibration device of claim 6, further comprising a display unit connected to the control unit, the display unit being configured to display the measured water volume.
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| CN113639832B (en) * | 2021-08-12 | 2024-02-13 | 宁波水表(集团)股份有限公司 | Detection method and monitoring system for water meter measurement accuracy influence factors |
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