CN112763028A - Intelligent meter calibration system and method for ultrasonic water meter - Google Patents
Intelligent meter calibration system and method for ultrasonic water meter Download PDFInfo
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Abstract
An intelligent meter calibration system and a meter calibration method for an ultrasonic water meter relate to the technical field of ultrasonic water meters. The water meter calibration device comprises a meter calibration platform body, wherein the meter calibration platform body is connected with a plurality of RS485 communication modules through RS485 buses, and each RS485 communication module is correspondingly connected with a water meter to be calibrated; the RS485 communication module receives the test data returned by the water meter to be calibrated on one hand, and transmits the test data to the calibration table body after attaching the communication address of the RS485 communication module; and on the other hand, the calibration value and the communication address sent by the meter calibration platform body are received, the received communication address is compared with the communication address of the meter calibration platform body, and if the received communication address and the communication address are the same, the received calibration value is transmitted to the water meter to be calibrated connected with the meter calibration platform body, so that the meter calibration is completed. The invention adopts RS485 communication between the water meter to be measured and the communication module, so as to increase the length of the communication line as much as possible according to different sizes of the appearances of various caliber meters and ensure the stability of the communication.
Description
Technical Field
The invention relates to the technical field of ultrasonic water meters, in particular to an intelligent meter correcting system and method for an ultrasonic water meter.
Background
At present, in the ultrasonic meter calibration industry, a start-stop method and a reversing method are adopted in a mainstream meter calibration mode, a communication or manual reading mode is adopted between a table body and a meter for meter calibration, the scheme of reading through communication gradually replaces manual reading, but the communication reading scheme on the market at present mainly adopts pulse reading and RS485 matched with M-BUS communication.
The pulse reading is suitable for single meter calibration, a plurality of water meters can not be calibrated simultaneously, the working hour for producing a batch of water meters is longer, and the efficiency is not high.
The RS485 and M-BUS communication calibration scheme is as follows: the ultrasonic water meter is connected with a TTL Bus interface of the signal processing module through a serial port of an MCU of the ultrasonic water meter, an RS485 Bus interface of the signal processing module is connected with an RS485 Bus interface of the platform processor module, and an M-Bus interface of the platform processor module is connected with an M-Bus interface of the meter to be calibrated; the signal processing module reads the original signal data output by the ultrasonic water meter, calculates the corresponding time and period of the signal, judges whether the condition of meter calibration is met, and then sends the processed data to the platform processor module for meter calibration. The disadvantages are that: TTL is adopted between the water meter and the signal processing module, RS485 is adopted between the signal processing module and the platform body, and the platform body is connected with the water meter by using M-BUS. In addition, the water meters and the platform body respectively adopt two communication modes to form a meter calibration flow circuit, and when a plurality of water meters are calibrated at the same time, the addresses of the water meters are required to be set so as to ensure that the calibration value can be accurately issued to the corresponding water meters; and RS485 is a half-duplex communication mode, and can form a meter calibration flow circuit, thus causing the waste of platform resources invisibly, increasing the working hours for setting the address of the water meter and reducing the efficiency.
Disclosure of Invention
The invention aims to overcome the defects in the prior art and provides an intelligent meter correcting system and a meter correcting method for an ultrasonic water meter.
The technical scheme adopted by the invention is as follows: an intelligent meter correcting system for an ultrasonic water meter comprises a meter correcting platform body, wherein the meter correcting platform body is connected with a plurality of RS485 communication modules through RS485 buses, and each RS485 communication module is correspondingly connected with a water meter to be corrected;
the RS485 communication module receives the test data returned by the water meter to be calibrated on one hand, and transmits the test data to the calibration table body after attaching the communication address of the RS485 communication module; and on the other hand, the calibration value and the communication address sent by the meter calibration platform body are received, the received communication address is compared with the communication address of the meter calibration platform body, and if the received communication address and the communication address are the same, the received calibration value is transmitted to the water meter to be calibrated connected with the meter calibration platform body, so that the meter calibration is completed.
Preferably, the RS485 communication module is further configured to receive a command and a communication address issued by the meter calibrating body, compare the received communication address with the communication address of the meter calibrating body, and transmit the received command to the water meter to be calibrated connected to the received command if the received communication address is the same as the communication address of the meter calibrating body.
Preferably, the RS485 communication module comprises a processing unit, a storage unit, a platform body communication unit, a water meter communication unit and a power supply unit, wherein,
the platform body communication unit is in communication connection with the processing unit on one hand and is in communication connection with the meter calibration platform body through an RS485 bus on the other hand; the calibration value and the communication address which are issued by the calibration table body are received and transmitted to the processing unit;
the processing unit is in communication connection with the water meter communication unit; receiving the calibration value and the communication address transmitted by the platform body communication unit, and transmitting the received calibration value to the water meter communication unit when the received communication address is the same as the communication address of the platform body communication unit;
the water meter communication unit is in communication connection with the water meter to be calibrated through the RS485 interface and is used for transmitting the received calibration value to the water meter to be calibrated connected with the water meter to be calibrated;
the storage unit is in communication connection with the processing unit and is used for recording the working log of the RS485 communication module;
and the power supply unit is used for providing working power supply for the processing unit, the storage unit, the platform body communication unit and the water meter communication unit respectively.
Preferably, the first and second liquid crystal materials are,
the water meter communication unit is also used for receiving the test data returned by the water meter to be calibrated and transmitting the test data to the processing unit;
the processing unit is also used for receiving the test data transmitted by the water meter communication unit, and transmitting the test data to the platform body communication unit after attaching the communication address of the processing unit;
and the platform body communication unit is also used for receiving the test data which is transmitted by the processing unit and is added with the communication address, and transmitting the test data to the meter calibration platform body through an RS485 bus.
Preferably, the first and second liquid crystal materials are,
the table body communication unit is also used for receiving the command and the communication address issued by the calibration table body and transmitting the command and the communication address to the processing unit;
the processing unit is also used for receiving the command and the communication address transmitted by the platform body communication unit and transmitting the received command to the water meter communication unit when the received communication address is the same as the communication address of the processing unit;
and the water meter communication unit is also used for transmitting the received command to the water meter to be calibrated connected with the water meter communication unit.
Preferably, the RS485 communication module further comprises an upper computer communication unit in communication connection with the processing unit.
Preferably, the table calibration body stores communication addresses of the RS485 communication modules connected with the table calibration body.
A meter correcting method of an ultrasonic water meter intelligent meter correcting system comprises the following steps:
s1, the water meter to be calibrated transmits the test data to the RS485 communication module connected with the water meter to be calibrated;
the S2 and RS485 communication modules receive test data returned by the water meter to be calibrated, and transmit the test data to the meter calibrating platform body after attaching the communication address of the test data to the water meter to be calibrated;
s3, after receiving the test data and the corresponding communication address transmitted by the RS485 communication module, the calibration table body obtains a calibration value according to the received test data and the data acquired by the calibration table body, and after adding the calibration value to the communication address corresponding to the test data, the calibration value is issued to the RS485 communication module through an RS485 bus;
and the S4 and RS485 communication modules receive the calibration value and the communication address issued by the table calibration body, compare the received communication address with the communication address of the communication module, and if the communication address and the communication address are the same, transmit the received calibration value to the water meter to be calibrated connected with the calibration module to finish the table calibration.
Preferably, the method for calibrating a meter further comprises:
s0: the meter calibration platform body issues a command and a communication address to the RS485 communication module; and the RS485 communication module receives the command and the communication address issued by the calibration table body, compares the received communication address with the communication address of the RS485 communication module, and transmits the received command to the water meter to be calibrated connected with the RS485 communication module if the received communication address and the communication address are the same.
Preferably, the calibration table body issues the calibration value and the communication address to the RS485 communication module in a polling manner.
The invention has the beneficial effects that:
1. RS485 communication is adopted between the water meter to be measured and the communication module, so that the length of the communication line is increased as much as possible according to different sizes of appearances of various caliber meters, and meanwhile, the stability of communication is ensured.
2. The communication module is connected with the water meter to be measured and the meter correcting platform body in an RS485 mode, and one communication channel can form a meter correcting loop by utilizing a half-duplex communication mode of the RS 485.
3. The RS485 communication module receives the test data returned by the water meter to be calibrated on one hand, and transmits the test data to the calibration table body after attaching the communication address of the RS485 communication module; on the other hand, the calibration value and the communication address sent by the meter calibration platform body are received, the received communication address is compared with the communication address of the meter calibration platform body, if the calibration value and the communication address are the same, the received calibration value is transmitted to the water meter to be calibrated which is connected with the calibration value, the half-duplex communication mode of RS485 is directly utilized, one communication channel forms a meter calibration loop, the calibration value can be accurately sent to the corresponding water meter without setting the address of the water meter, and the meter calibration efficiency is improved.
Drawings
FIG. 1 is a block diagram of a calibration system according to the present invention.
Fig. 2 is a schematic block diagram of an RS485 communication module circuit of the present invention.
FIG. 3 is a schematic diagram of a processing unit circuit according to the present invention.
FIG. 4 is a schematic diagram of a memory cell circuit according to the present invention.
Fig. 5 is a schematic circuit diagram of the communication unit of the platform of the present invention.
Fig. 6 is a schematic circuit diagram of the water meter communication unit of the present invention.
Fig. 7 is a schematic diagram of a power supply unit circuit of the present invention.
FIG. 8 is a schematic circuit diagram of the communication unit of the upper computer according to the present invention.
FIG. 9 is a schematic diagram of a detection unit circuit according to the present invention.
Detailed Description
The present invention will be further described with reference to the following examples. The following examples are set forth merely to aid in the understanding of the invention. It should be noted that, for a person skilled in the art, several modifications can be made to the invention without departing from the principle of the invention, and these modifications and modifications also fall within the protection scope of the claims of the present invention.
The invention adopts the RS485 communication module to be connected with the meter calibration platform body and the water meter to be calibrated at the same time, the communication address of each RS485 communication module connected with the RS485 communication module is stored in the meter calibration platform body, each RS485 communication module is correspondingly connected with one water meter to be calibrated to form 1-to-1 communication, the address set in the water meter can be ignored by adopting broadcast address communication, and the flow of setting the communication address in the water meter is reduced. In addition, RS485 communication is adopted between the water meter to be calibrated and the RS485 communication module, and the length of the communication line is increased as much as possible according to different sizes of appearances of various caliber meters, and meanwhile, the stability of communication is guaranteed. And the meter calibration platform body and the water meter to be measured are communicated in a half-duplex mode in an RS485 communication mode so as to form a meter calibration flow loop.
As shown in fig. 1, the intelligent meter calibrating system for the ultrasonic water meter in the embodiment includes a meter calibrating table body 1, wherein the meter calibrating table body 1 is connected with a plurality of RS485 communication modules 2 through RS485 buses, and each RS485 communication module 2 is correspondingly connected with a water meter 3 to be calibrated; the communication addresses of the RS485 communication modules 2 connected with the calibration table body 1 are stored in the calibration table body 1;
the RS485 communication module 2 receives the test data returned by the water meter 3 to be calibrated on one hand, and transmits the test data to the meter calibrating platform body 1 after attaching the communication address of the RS485 communication module; on the other hand, the calibration value and the communication address issued by the meter calibration table body 1 are received, the received communication address is compared with the communication address of the meter calibration table body, and if the received communication address and the communication address are the same, the received calibration value is transmitted to the water meter 3 to be calibrated connected with the calibration value, so that the meter calibration is completed; if the two are different, then do not do any processing, directly discard. The half-duplex communication mode of RS485 is directly utilized, one communication channel forms a meter calibration loop, on one hand, an address does not need to be set for the water meter, and the communication address of the RS485 communication module is utilized in the communication process, so that the calibration value can be ensured to be accurately issued to the corresponding water meter to be calibrated, the meter calibration efficiency is improved, on the other hand, the requirement for a reserved interface of the water meter is reduced, the interface resource of a meter calibration platform body is saved, and the hardware cost is reduced.
The RS485 communication module 2 is also used for receiving a command and a communication address issued by the meter calibrating platform body 1, comparing the received communication address with the communication address of the RS485 communication module, and if the received communication address and the communication address are the same, transmitting the received command to the water meter 3 to be calibrated connected with the RS485 communication module; if the two are different, then do not do any processing, directly discard.
As shown in fig. 2, the RS485 communication module 2 includes a processing unit 2-1, a storage unit 2-2, a platform body communication unit 2-3, a water meter communication unit 2-4 and a power supply unit 2-5, wherein,
the platform body communication unit 2-3 is in communication connection with the processing unit 2-1 on one hand and is in communication connection with the meter calibration platform body 1 through an RS485 bus on the other hand; the calibration table is used for receiving the calibration value and the communication address issued by the calibration table body 1 and transmitting the calibration value and the communication address to the processing unit 2-1;
the processing unit 2-1 is in communication connection with the water meter communication unit 2-4; receiving the calibration value and the communication address transmitted by the platform body communication unit 2-3, and transmitting the received calibration value to the water meter communication unit 2-4 when the received communication address is the same as the communication address of the platform body communication unit;
the water meter communication unit 2-4 is in communication connection with the water meter 3 to be calibrated through an RS485 interface and is used for transmitting the received calibration value to the water meter 3 to be calibrated connected with the calibration value so as to finish meter calibration; by utilizing the RS485 transmission characteristic, the length of a communication line is increased as much as possible, and meanwhile, the stability of communication is ensured;
the storage unit 2-2 is in communication connection with the processing unit 2-1 and is used for recording the working log of the RS485 communication module 2;
and the power supply unit 2-5 is used for respectively providing working power supply for the processing unit 2-1, the storage unit 2-2, the platform body communication unit 2-3 and the water meter communication unit 2-4.
In the foregoing description,
the water meter communication unit 2-4 is also used for receiving the test data returned by the water meter 3 to be calibrated and transmitting the test data to the processing unit 2-1;
the processing unit 2-1 is also used for receiving the test data transmitted by the water meter communication unit 2-4, attaching the communication address of the processing unit and transmitting the test data to the platform body communication unit 2-3;
the table body communication unit 2-3 is further configured to receive the test data transmitted by the processing unit 2-1 and appended with the communication address, and transmit the test data to the calibration table body 1 through the RS485 bus.
In the foregoing description,
the table body communication unit 2-3 is also used for receiving the command and the communication address issued by the calibration table body 1 and transmitting the command and the communication address to the processing unit 2-1;
the processing unit 2-1 is also used for receiving the command and the communication address transmitted by the platform body communication unit 2-3, and transmitting the received command to the water meter communication unit 2-4 when the received communication address is the same as the communication address of the processing unit;
the water meter communication unit 2-4 is also used for transmitting the received command to the water meter 3 to be calibrated connected with the water meter communication unit.
As shown in fig. 3-9, in this example, the processing unit 2-1 is composed of a main control chip U3 (manufactured by shanghai compound denier micro corporation) of model FM33LC046N and its peripheral circuits.
The memory cell 2-2 is an erasable read only memory U5 (manufactured by Shanghai Compound Dan micro corporation) with model number FM24C256A, and the pins 5 and 6 are connected to the pins 47 and 46 of the main control chip U3, respectively.
The platform body communication unit 2-3 comprises an RS485 transceiver chip U4 (with the model of MAX485) in communication connection with the processing unit 2-1 and an interface P4 (with four pins) in communication connection with the RS485 transceiver chip U4; the interface P4 is used for being connected with the RS485 bus. Pins 1 and 4 of the RS485 transceiver chip U4 are connected to pins 7 and 8 of the main control chip U3, pins 2 and 3 are connected to pin 9 of the main control chip U3, and pins 6 and 7 are connected to pins 3 and 2 of the interface P4 through resistors R16 and R14, respectively.
The water meter communication unit 2-4 comprises an RS485 transceiver chip U6 (with the model of MAX485) in communication connection with the processing unit 2-1 and an interface P5 (with four pins) in communication connection with the RS485 transceiver chip U6; the interface P5 is used for being in communication connection with the water meter to be tested. Pins 1 and 4 of the RS485 transceiver chip U6 are connected to pins 31 and 32 of the main control chip U3, pins 2 and 3 are connected to a pin 30 of the main control chip U3, and pins 6 and 7 are connected to pins 3 and 2 of the interface P5 through resistors R26 and R24, respectively.
The power supply units 2-5 comprise a voltage stabilizing chip U1 (manufactured by Beijing Santa Clan micro corporation) with the model number of SGM6623YN6G/TR, a filter circuit (for filtering input voltage and current) electrically connected to the input end of the voltage stabilizing chip U1, and a rectifying and filtering circuit (for rectifying and filtering the voltage and current after being reduced by the voltage stabilizing chip to obtain 3.6V direct-current voltage) electrically connected to the output end of the voltage stabilizing chip U1.
As a preferred implementation of this embodiment, the communication module further includes an upper computer communication unit 2-6 communicatively connected to the processing unit 2-1, so as to be compatible with a meter calibration platform or a hand-reading device of another communication method.
As a preferred implementation of this embodiment, the communication module further includes a detection unit 2-7 communicatively connected to the processing unit 2-1; in this example, the detection unit 2-7 adopts a hall sensor U2 with the model MT1321AT, and an output pin 2 of the hall sensor U2 is connected to a pin 4 of a main control chip U3; the system is used for detecting the operation of an operator on the water meter and transmitting the detected signal to the processing unit 2-1 so as to judge whether the normal working mode or the factory debugging mode is currently entered.
In practical application, the meter calibrating platform body 1 controls a meter calibrating system to be communicated with water, the meter calibration is started after the water flow in the meter calibrating platform body 1 is stable (for example, through preset stabilization time), the meter calibrating platform body 1 polls and accesses the RS485 communication module 2, the RS485 communication module 1 accesses the water meter to be calibrated 3 to the meter 1, and the current flow speed in the meter is obtained; specifically, the meter calibrating platform body 1 selects a communication address of an RS485 communication module 2 (the communication addresses of the RS485 communication modules connected with the meter calibrating platform body are stored in the meter calibrating platform body) each time, and sends a command to each RS485 communication module 2 through an RS485 bus, after receiving the command and the communication addresses, the RS485 communication module 2 judges whether the received communication address is the same as the communication address of the RS485 communication module, and if the received communication address is the same as the communication address of the RS485 communication module, the received command is transmitted to the water meter 3 to be calibrated connected with the RS485 communication module; if the two are different, then do not do any processing, directly discard. The water meter 3 to be calibrated returns test data (such as flow rate in the meter) to the RS485 communication module 2 connected with the water meter 3 to be calibrated according to the received command, and the RS485 communication module 2 receives the test data returned by the water meter 3 to be calibrated, attaches a communication address of the RS485 communication module and then transmits the test data to the meter calibrating platform body 1; the meter calibrating platform body 1 selects the communication address of the next RS485 communication module 2 according to the steps, sends the communication address together with the command to each RS485 communication module 2 through the RS485 bus, and receives the returned test data and the communication address until all the water meters to be calibrated in the meter calibrating system return the test data, so that one polling is completed.
Repeating the polling until the water-passing time reaches the preset calibration time, and dividing the calculated volume of the water stored in the calibration table body by the calibration time to calculate the average flow rate which is recorded as the flow rate of the table body; assuming that the time spent by polling once is 1s, that is, each meter feeds back a flow rate to the table body of the calibration meter every second, an average flow rate can be obtained by combining the flow rates fed back with the calibration time and is recorded as the flow rate of the meter, a calibration value k is obtained by the flow rate of the meter and the flow rate of the table body, and the calibration value of each meter is written into the meter through the RS485 communication module 2 in a polling mode after the operation of the table body, so that the calibration of the meter is completed. Specifically, the RS485 communication module 2 receives the calibration value and the communication address issued by the meter calibrating table body 1, compares the received communication address with the communication address of the RS485 communication module, and transmits the received calibration value to the water meter 3 to be calibrated connected with the RS485 communication module to finish meter calibration if the received communication address is the same as the communication address of the RS485 communication module; if not, the data is directly discarded.
The method for calibrating the meter by adopting the intelligent meter calibrating system for the ultrasonic water meter comprises the following steps:
s0: the meter calibrating platform body 1 issues a command and a communication address to the RS485 communication module 2; the RS485 communication module 2 receives the command and the communication address issued by the calibration table body 1, compares the received communication address with the communication address of the RS485 communication module, and transmits the received command to the water meter 3 to be calibrated connected with the RS485 communication module if the received communication address and the communication address are the same;
s1, the water meter 3 to be calibrated transmits the test data to the RS485 communication module 2 connected with the water meter;
s2 and the RS485 communication module 2 receive test data returned by the water meter 3 to be calibrated, attach a communication address of the test data and transmit the test data to the calibration table body 1;
s3, after receiving the test data and the corresponding communication address transmitted by the RS485 communication module 2, the calibration table body 1 obtains a calibration value according to the received test data and the data acquired by the calibration table body, and after adding the calibration value to the communication address corresponding to the test data, the calibration value is issued to the RS485 communication module 2 through an RS485 bus;
and S4 and the RS485 communication module 2 receive the calibration value and the communication address issued by the meter calibrating table body 1, compare the received communication address with the communication address of the communication module, and if the received communication address and the communication address are the same, transmit the received calibration value to the water meter 3 to be calibrated connected with the calibration module to finish meter calibration.
Claims (10)
1. The utility model provides an ultrasonic water meter intelligence school table system, includes school table body (1), its characterized in that: the meter calibrating platform body (1) is connected with a plurality of RS485 communication modules (2) through RS485 buses, and each RS485 communication module (2) is correspondingly connected with a water meter (3) to be calibrated;
the RS485 communication module (2) receives test data returned by the water meter (3) to be calibrated, attaches a communication address of the RS485 communication module and transmits the test data to the meter calibrating platform body (1); and on the other hand, the calibration value and the communication address issued by the meter calibration table body (1) are received, the received communication address is compared with the communication address of the meter calibration table body, and if the received communication address and the communication address are the same, the received calibration value is transmitted to the water meter (3) to be calibrated connected with the calibration value, so that the meter calibration is completed.
2. The intelligent calibration system for ultrasonic water meters as claimed in claim 1, characterized in that: the RS485 communication module (2) is also used for receiving a command and a communication address issued by the meter calibrating table body (1), comparing the received communication address with the communication address of the meter calibrating table body, and transmitting the received command to the water meter (3) to be calibrated connected with the meter calibrating table body if the received communication address is the same as the communication address of the meter calibrating table body.
3. The intelligent calibration system for ultrasonic water meters as claimed in claim 1, characterized in that: the RS485 communication module (2) comprises a processing unit (2-1), a storage unit (2-2), a platform body communication unit (2-3), a water meter communication unit (2-4) and a power supply unit (2-5), wherein,
the table body communication unit (2-3) is in communication connection with the processing unit (2-1) on one hand and is in communication connection with the meter calibration table body (1) through an RS485 bus on the other hand; the calibration table is used for receiving the calibration value and the communication address issued by the calibration table body (1) and transmitting the calibration value and the communication address to the processing unit (2-1);
the processing unit (2-1) is in communication connection with the water meter communication unit (2-4); receiving the calibration value and the communication address transmitted by the platform body communication unit (2-3), and transmitting the received calibration value to the water meter communication unit (2-4) when the received communication address is the same as the communication address of the platform body communication unit;
the water meter communication unit (2-4) is in communication connection with the water meter (3) to be calibrated through an RS485 interface and is used for transmitting the received calibration value to the water meter (3) to be calibrated connected with the calibration value;
the storage unit (2-2) is in communication connection with the processing unit (2-1) and is used for recording the working log of the RS485 communication module (2);
and the power supply unit (2-5) is used for respectively providing working power supply for the processing unit (2-1), the storage unit (2-2), the platform body communication unit (2-3) and the water meter communication unit (2-4).
4. The intelligent calibration system for ultrasonic water meters as claimed in claim 3, characterized in that:
the water meter communication unit (2-4) is also used for receiving the test data returned by the water meter (3) to be calibrated and transmitting the test data to the processing unit (2-1);
the processing unit (2-1) is also used for receiving the test data transmitted by the water meter communication unit (2-4), and transmitting the test data to the platform body communication unit (2-3) after attaching the communication address of the processing unit;
the table body communication unit (2-3) is also used for receiving the test data which is transmitted by the processing unit (2-1) and added with the communication address, and transmitting the test data to the meter calibration table body (1) through an RS485 bus.
5. The intelligent calibration system for ultrasonic water meters as claimed in claim 3, characterized in that:
the table body communication unit (2-3) is also used for receiving the command and the communication address issued by the calibration table body (1) and transmitting the command and the communication address to the processing unit (2-1);
the processing unit (2-1) is also used for receiving the command and the communication address transmitted by the platform body communication unit (2-3), and transmitting the received command to the water meter communication unit (2-4) when the received communication address is the same as the communication address of the processing unit;
the water meter communication unit (2-4) is also used for transmitting the received command to the water meter (3) to be calibrated connected with the water meter communication unit.
6. The intelligent calibration system for ultrasonic water meters as claimed in claim 3, characterized in that: the RS485 communication module (2) further comprises an upper computer communication unit (2-6) in communication connection with the processing unit (2-1).
7. The intelligent calibration system for ultrasonic water meters as claimed in claim 1, characterized in that: and communication addresses of the RS485 communication modules (2) connected with the calibration table body (1) are stored in the calibration table body.
8. The intelligent meter calibrating method for the ultrasonic water meter according to any one of claims 1 to 7, characterized by comprising the following steps:
s1, the water meter (3) to be calibrated transmits the test data to the RS485 communication module (2) connected with the water meter;
the S2 and RS485 communication module (2) receives test data returned by the water meter (3) to be calibrated, attaches a communication address of the test data and transmits the test data to the meter calibrating platform body (1);
s3, after receiving the test data and the corresponding communication address transmitted by the RS485 communication module (2), the calibration table body (1) obtains a calibration value according to the received test data and the data acquired by the calibration table body, and after adding the calibration value to the communication address corresponding to the test data, the calibration value is issued to the RS485 communication module (2) through an RS485 bus;
and S4 and the RS485 communication module (2) receive the calibration value and the communication address issued by the meter calibration table body (1), compare the received communication address with the communication address of the communication module, and if the communication address and the communication address are the same, transmit the received calibration value to the water meter (3) to be calibrated connected with the calibration module to finish meter calibration.
9. A method according to claim 8, wherein the method further comprises:
s0: the meter calibration platform body (1) issues commands and communication addresses to the RS485 communication module (2); the RS485 communication module (2) receives the command and the communication address issued by the meter calibrating platform body (1), compares the received communication address with the communication address of the RS485 communication module, and transmits the received command to the water meter (3) to be calibrated connected with the RS485 communication module if the received communication address and the communication address are the same.
10. A method according to claim 8, wherein: the calibration table body (1) issues calibration values and communication addresses to the RS485 communication module (2) in a polling mode.
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Citations (10)
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| CN111344542A (en) * | 2019-06-28 | 2020-06-26 | 深圳市大疆创新科技有限公司 | Flowmeter calibration system, method, device and storage medium |
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| CN102494743A (en) * | 2011-12-27 | 2012-06-13 | 重庆市智能水表有限责任公司 | Small-flow automatic detection device and detection method for water meters |
| CN103983331A (en) * | 2014-05-29 | 2014-08-13 | 湖南威铭能源科技有限公司 | Electronic type water meter calibration system and meter calibration method thereof |
| CN204228937U (en) * | 2014-10-28 | 2015-03-25 | 福州昌晖自动化系统有限公司 | A kind of 8 epi-position signal switching apparatus and digital instrument automatic school inspection control device |
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| CN109188117A (en) * | 2018-07-26 | 2019-01-11 | 浙江中科领航汽车电子有限公司 | A kind of Meter Test system and test method based on Labview |
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| CN111344542A (en) * | 2019-06-28 | 2020-06-26 | 深圳市大疆创新科技有限公司 | Flowmeter calibration system, method, device and storage medium |
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