CN201122109Y - Water meter automatic verification device - Google Patents

Abstract

The utility model discloses an automatic verification device for a water meter. It is mainly composed of water source device, verification table, solenoid valve, flow meter, standard device, camera, image switching device, electric control box, water pipes, computer, etc. The camera is connected to the image acquisition card inside the computer through the image switching device. And it is fixed by an adjustable bracket so that it is aligned with the water meter to be tested. The water from the standard water source is connected in series by the water meter to be tested, and then flows into the standard device through the solenoid valve and then the flow meter. The initial value and the final value reading, the standard device correspondingly gives a water level standard value and sends it to the computer, after the computer processes the data, the detection result is obtained. The water meter automatic verification device of the utility model has the advantages of simple structure, stable performance, automatic completion of the whole detection process, high precision, simple operation, objective detection result and convenient popularization.

Description

Water meter automatic verification device

technical field

The utility model relates to an automatic verification device for a water meter.

Background technique

Ordinary water meters are widely used in tap water, heat, chemical and other industries. Therefore, enterprises or measurement departments that produce water meters need to perform performance verification on the indication error of these water meters in accordance with the regulations formulated by relevant departments. According to the provisions of the National Metrology Verification Regulations, the verification of water meters requires the verification of three flow points: nominal flow, boundary flow, and minimum flow. The current verification method is carried out manually. The verification personnel need to manually switch the water flow three times, manually read the readings of the tested water meter four times and read the water level of the standard container three times, and manually record these data and calculate various errors. Entering the test data into the computer is convenient for archiving and record printing. During the entire verification process, the verification personnel must control the operation of the verification device in real time. Manually reading a large amount of data repeatedly will inevitably bring about certain human errors. Therefore, it has many shortcomings such as heavy workload, low efficiency, low precision, large human error, and unobjective test results.

Utility model content

The utility model provides a new type of water meter automatic verification device meeting the verification requirements, and realizes a fully automatic verification device with stable performance, high precision, high efficiency, automatic reading of the tested water meter reading and automatic measurement of standard water volume.

The technical scheme adopted by the utility model to solve the following technical problems is: the water meter automatic verification device, including a water source device capable of providing a certain water pressure, and a plurality of tested water meters connected in series are connected to the water source device and fixed on the water meter verification platform. The water outlet of the water meter to be tested is connected in series with several solenoid valves connected in parallel, and each solenoid valve connected in parallel is connected to the standard device. Above each water meter of the verification platform, a device for reading the pointer reading of the water meter is installed. The camera is connected with the image acquisition card inside the computer through the image switcher, and the computer is also connected with the electric control box for controlling and measuring the water level of the standard container, and the electric control box is electrically connected with the solenoid valve.

The water meter automatic verification device uses the camera to capture the image of the water meter and transmits it to the computer. The verification software recognizes the effective pointer reading of the water meter. The electric control box controls and measures the water level of the standard container and sends the measurement data to the computer. The entire verification process is fully automated. The computer finally calculates the result and prints out the test report.

The water source device is a sealed impermeable metal tank that provides a pressure water source of 0.4 MPa. A solenoid valve and a water storage device are arranged below the quasi-device. connected. The water meter automatic verification device is mainly composed of a water source device, a verification platform, a solenoid valve, a flow meter, a standard device, a camera, an image switching device, an electric control box, a water pipe, and a computer. The camera is connected to the computer through an image acquisition card and fixed on the On a movable bracket, the bracket is installed on the movable guide rail directly above the water meter. The camera is aimed at the working surface of the water meter to be inspected. After the water of a certain pressure in the water source device passes through a solenoid valve, it is connected to several water meters connected in series. After three sets of parallel solenoid valves and flowmeters, it finally flows into the standard device. The standard device puts water into the water tank through the bottom solenoid valve, and the water in the water tank is pumped to the water source device through the water pump to form a complete circuit.

The utility model adopts a high-definition industrial camera, and uses a high-speed image acquisition card to connect with a computer. The camera is fixed on an adjustable bracket, and the image position is changed by adjusting the left and right, front and rear positions of the bracket. Adjust the focus ring to achieve the best results for the image.

The computer described in the utility model is equipped with a set of verification software with professional image recognition technology, uses a professional image acquisition card, and can collect four-way image signals at the same time. This device uses an image switching device to collect up to five groups A total of 20 water meter images, that is, on the same verification platform, up to 20 water meters can be verified at the same time.

The water level measuring head device in the standard container used by the utility model comprises two parts of water level detection and water level measurement. The water level detection is to use the light-emitting tube and the photoelectric receiving tube to be respectively located on both sides of the glass water pipe and fixed on it. When the water level rises, because the water level forms a surface in the glass tube, which has a refraction effect on the light, the photoelectric receiving tube will generate light for this change. A pulse signal is sent to the electric control box, and the electric control box closes the solenoid valve to stop water inflow. The water level measurement also utilizes the luminescent tube and the photoelectric receiving tube located on both sides of the glass water tube, and uses a small motor to drive the luminescent tube and the photoelectric receiving tube to rise at the same time. After the motor rotates and counts, the corresponding water volume is generated, and the water volume actually flowed by the water meter is obtained.

The used standard container of the utility model refers to the metal container that has six kinds of volumes that are respectively 5 liters, 10 liters, 20 liters, 50 liters, 100 liters, and 300 liters.

The operation process of verification work is as follows:

Install and fix the tested water meter, ensure that the working surface of the tested water meter faces the camera, adjust the position of the camera so that the image of the tested water meter is within the range required by the computer verification software, adjust the focus circle and aperture, so that the image can achieve the desired effect of the verification . Click "Input Information" on the computer software, enter the relevant information of the water meter to be tested and press OK, click "Start Verification", the computer will send a verification command to the electric control box of the device, and the device will automatically run according to the corresponding regulations. The microprocessor in the electric control box detects the water level in real time. When the water level reaches the nominal water level, after receiving the water level electrical signal from the water level measuring device, the solenoid valve is closed to stop the water intake, and then the standard water level is measured. At the same time, the computer takes pictures of the water meter image and processes the image quickly. Data, read out the reading of the tested water meter, and then compare and calculate with the actual standard water level, so as to automatically complete the relevant data processing, and display and print the verification results.

To sum up, the beneficial effects of the utility model are: simple structure, stable performance, high precision, easy operation, more objective test results, and the whole test process is fully automatic.

Description of drawings

Fig. 1 is the electrical composition block diagram of the present utility model;

Fig. 2 is a schematic structural diagram of this embodiment.

Detailed ways

Referring to Fig. 1 and shown in Fig. 2, the water meter automatic verification device of the present utility model is mainly made up of computer, electric control box, interface circuit, camera, image switching device, image acquisition card, standard container, water level measuring device, solenoid valve. The camera is connected to the computer through the image acquisition card after passing through the image switching device, the electric control box is connected to the solenoid valve and receives the standard device, the standard device sends the measurement data, and transmits the data to the computer through the interface circuit.

Before the verification, the camera recognizes its initial value and final value, and the standard container gives a corresponding standard amount of water. The reading of the water meter under inspection is photographed and identified by the computer through the camera, and the data processing is automatically completed after calculation by the computer. The water meter automatic verification device has simple structure and stable performance.

The automatic verification device for water meters has a computer and an industrial camera. The computer can be any microcomputer or notebook computer. In order to improve the accuracy, the implementation of this embodiment adopts a high-definition industrial camera, which is connected to the computer through an image acquisition card, and through a The adjustable bracket is fixed above the working surface of the device, and its positions in the three directions of up and down, left and right, and front and back are adjusted through the adjustment device of the fixed bracket, and the tested appliance is connected with the pressure standard.

In Fig. 2, after the stabilized water source device 6 is connected in series with the water meter 8 to be tested, it is connected to the standard device 7 after passing through three groups of electromagnetic valves 10, the flow meter 9, and a solenoid valve 14 and a pool 15 are arranged below the standard device. The water pool 15 is connected to the water pump 12 through the pipeline 13, and the water pump 12 is connected to the pressure-stabilizing water source device 6. The camera 5 directly above the water meter 8 to be checked is connected to the computer 2 through the image switching device 1, and the computer is connected to the electric control box 4 through the interface circuit 3 at the same time, and the electric control box is electrically connected to all solenoid valves (including solenoid valve 10 and solenoid valve 14). connect.

The best embodiment of the utility model has been explained, and various changes or modifications made by those skilled in the art all belong to the protection scope of the utility model.

Claims (10)

1. Water meter automatic verification device, including a water source device that can provide a certain water pressure. Multiple tested water meters connected in series are connected to the water source device and fixed on the water meter verification platform. The water outlet of the tested water meter is connected to several parallel connected Solenoid valves are connected in series, and each solenoid valve connected in parallel is connected to the standard device. It is characterized in that: a camera for reading the pointer reading of the water meter is installed above each water meter of the verification platform, and the camera passes through the image switcher. It is connected with the image acquisition card inside the computer, and the computer is also connected with the electric control box for controlling and measuring the water level of the standard container, and the electric control box is electrically connected with the electromagnetic valve. 2. The water meter automatic verification device according to claim 1, characterized in that: the water source device is a sealed impermeable steel tank that provides a pressure water source of 0.4 MPa, and an electromagnetic valve and a storage tank are arranged below the quasi-device. The water device, the water storage device is connected with the water pump through the pipeline, and the water pump is connected with the pressure-stabilized water source device. 3. The water meter automatic verification device according to claim 1, characterized in that: said standard device is an electronic weighing device or a standard container. 4. The water meter automatic verification device according to claim 3, characterized in that: said electronic weighing device refers to an electronic weighing device with digital output and a metal can is placed on the workbench. 5. The water meter automatic verification device according to claim 3, characterized in that: said standard container refers to a standard container metal tank and a water level measuring device. 6. The automatic verification device for water meters according to claim 5, characterized in that: said water level measuring device is a set of components composed of a pair of luminescent tubes, a receiving tube, a micro motor and a driving structure dedicated to measuring the water level. location device. 7. The water meter automatic verification device according to claim 1, characterized in that: the computer is an ordinary desktop computer or a notebook computer, and the computer is provided with an image acquisition card with four-way image signal input, and the computer captures the image captured by the After the image of the water meter is measured, the recognition process is carried out to obtain the reading of the water meter under inspection. 8. The water meter automatic verification device according to claim 1, characterized in that: the image switcher is a group of circuits, including a circuit composed of 5 groups of 10 relays, and transmits the signals of all cameras of the verification platform to the A frame grabber inside a computer. 9. The water meter automatic verification device according to claim 1, characterized in that: the camera is placed directly above the water meter to be tested, and is fixed on an adjustable bracket that can be adjusted in three directions: left and right, up and down, and front and back. 10. The water meter automatic verification device according to claim 1, characterized in that: said verification platform can be equipped with up to 20 common dry and wet water meters with diameters ranging from 15 to 50 mm.

Images