We produce various of assembly lines applied in many fields, like led light, Shaft , led bulb ect. The production line can be customized. We also provide technical support to our customer. Besides production lines, we also supply stand-alone machines for motor manufacturing production, such as Armature Production Machine, stator production machine; and Motor Components, such as Commutator , Carbon Brush , Ball Bearing , insulation paper and so on. Non-standard Intelligent Assembly Line Intelligent Assembly Line, Non-standard Intelligent Assembly Line, assembly line, production line Ningbo Nide Mechanical Equipment Co., Ltd. , http://www.nide-auto.com
Description of the Invention The invention belongs to the technical field of water meters, and in particular relates to a household water meter on-site calibration meter and a verification method thereof.
BACKGROUND OF THE INVENTION The verification of the accuracy of on-site measurement of a conventional household water meter is based on a comparison of a measured water meter with a standard water meter. The specific measures are: 1) Connect the outlet pipe in the household to the inlet of the on-site calibration meter through the hose, and the outlet of the on-site calibration meter to the water container through the hose; 2) Open the calibration meter by the operator The electronically controlled valve adjusts the tap to change the flow rate of water, and when the flow rate of water discharged from the faucet reaches the instantaneous flow rate value required by the calibration standard (according to the instantaneous flow value measured by the standard water meter), the electronic control valve of the on-site calibration meter is closed, Cut off the water flow of the pipeline; 3) When the standard water meter and the water meter under test in the on-site calibration meter stop rotating, record the initial readings of both, and then open the electronic control valve. At this time, the standard water meter and the measured water meter will start to measure at the same time. 4) When the water flow through the standard water meter reaches the volume value specified in the calibration (as judged by the cumulative flow value measured by the standard water meter), the operator closes the electronic control valve of the on-site calibration meter and reads out the period of time separately. The measured volume value of the standard water meter and the measured water meter (obtained from the water meter's measurement termination value minus the initial value); 5) The difference between the two can be used to determine the measurement accuracy of the calibration meter, ie the measured water meter. most Error tolerance.
Since the open and close of the control valve is controlled by naked eye reading and manual operation, there is a large operation error in the calibration process, which affects the accuracy and reliability of the on-site calibration; in addition, it is due to the standard water meter and the tested water meter. The installation distance between the two water meters is far away, which will also bring great inconvenience to the reading of the water meter when the meter is calibrated on the spot, which reduces the work efficiency of the on-site calibration.
SUMMARY OF THE INVENTION The present invention addresses the deficiencies of the prior art and provides a user metering device for household water meters that is convenient for reading water meters and has high schooling efficiency.
In order to solve the above technical problems, the present invention is solved by the following technical solutions: A household water meter on-site calibration device is characterized in that it includes an on-site calibration meter and an external conversion and transmission device; wherein the on-site calibration meter The computer includes a computer, the computer is connected with a standard water meter which is an electronic water meter, which is used for an electrical signal such as an instantaneous flow rate and an accumulated flow rate measured by the computer outputting a standard water meter; an external parameter input device and an external command input , which is used to input measurement parameters and measurement instructions into the computer; an instantaneous flow regulation valve, which is used to adjust the flow through the standard water meter to a specified instantaneous flow rate value; measure the opening and closing control valve, which is used to open The on-site calibration meter enables the standard water meter and the meter to be measured to perform synchronous measurement of the accumulated flow rate under the specified instantaneous flow rate conditions. 
The figure is a block diagram of the working principle of a field calibration meter according to an embodiment of the present invention
At the same time, when the computer measures that the metering water consumption is used up, the on-site calibration meter is automatically closed; a short-range wireless receiver is used to receive the volume measurement value of the water meter for the household meter; the measurement result is displayed. An apparatus for displaying an indication error value of a water meter to be tested; the external conversion and transmission apparatus comprises a photoelectric reflection electromechanical transducer and a short-range wireless transmitter, wherein the photoelectric reflection electromechanical transducer is used for The cumulative flow of the measuring water meter is converted into a pulsed electrical signal; the short-range wireless transmitter is used to send the accumulated flow pulse electrical signal of the measured water meter to the short-range wireless receiver of the on-site calibration meter.
The invention adopts methods of wireless communication, electromechanical conversion reading and automatic data processing, and can rapidly and accurately complete the indication error of the meter under different instantaneous flow conditions, and the reading is convenient, and the efficiency of field calibration work is high.
Preferably, the above-mentioned standard water meter is an electromagnetic water meter or an ultrasonic water meter or a jet water meter. The measurement accuracy level is higher than or equal to 1 level. The above computer is an embedded computer.
The invention also provides a method for verifying a water meter of a household, characterized by comprising the following steps: 1) inputting the indication error value of the standard water meter at different instantaneous flow rates in the field calibration meter Simultaneously input the pulse equivalent of the water meter under test; at the same time, set the water consumption for calibration under different instantaneous flow conditions on the on-site calibration meter; 2) Fix the external conversion and transmission device on the water meter under test, At the same time, the outlet pipe in the household is connected to the inlet of the on-site calibration meter through a hose. The outlet of the on-site calibration meter is inserted into the water container through the hose, and then the faucet is turned on. 3) The on-site calibration meter is automatically adjusted. The instantaneous flow regulating valve adjusts the flow rate through the standard meter of the field calibration meter to the specified instantaneous flow rate value; 4) turns on the measurement opening and closing control valve of the field calibration meter, and the standard water meter and the measured water meter are Measurement of the cumulative flow under the specified instantaneous flow rate conditions; 5) When the standard water meter detects that the calibration water consumption is used up, the computer sends a control command to make the measurement start and stop control. The valve is closed automatically and the measurement is completed; 6) The computer 11 of the field calibration meter calculates the standard water meter 12 and the measured water meter based on the error correction of the standard water indication value. And shows the value of the meter's indication error.
The beneficial effects of the present invention are: compared with the prior art, the present invention adopts methods such as wireless communication, electromechanical conversion readings and automatic data processing, and can quickly and accurately complete the indication error of the meter under different instantaneous flow conditions on the site. , And the reading is convenient, on-site calibration work efficiency.
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[Chinese instrument network meter patent] creative limit, instrumentation invention. Today we will introduce a national invention-invented patent—a household water meter on-site calibration meter and its calibration method. The patent was applied for by Ningbo Water Meter Co., Ltd. and was authorized to be announced on February 22, 2017.