[Instrument latest patent] A direct-reading remote photoelectric water meter system and use method

[Chinese instrument network meter patent] creative limit, instrumentation invention. Today we introduced a national invention-granting patent - a direct-reading remote optical water meter system and its usage. The patent was applied for by Jiangsu Bingchen Electronics Co., Ltd. and was authorized on December 15, 2017.

Content Description

The invention relates to the technical field of water meters, in particular to a direct-reading remote photoelectric water meter system.

Background of the invention

Water meters are commonly used instrumentation devices and are widely used in industry and home. With the increasing number of water users and the continuous improvement of users' demands for water supply services, traditional water meters and meter reading methods can no longer meet the development needs of urban water supply. With the development of modern science and technology, in the smart home, the meter reading method of the water meter also puts forward new requirements. That is, the meter reading method of the water meter and the meter in the smart home has higher reliability, real-time and data processing convenience. . In order to ensure that the meter readers read the meter accurately, quickly, and efficiently, the meter reading work has entered a modern, intelligent management mode, and the use of smart meter readers and remote meter reading to replace the traditional manual recording has become a trend.

Summary of the Invention

The object of the present invention is to provide a direct-reading remote-transmission photoelectric water meter system, which adopts infrared light-emitting diodes and infrared photosensors to form water meter data and uses M-Bus for data communication, thereby overcoming the ubiquitous structure of the water meters of the prior art. It is susceptible to external light interference, mutual interference between adjacent transmission tubes, bus-type meter reading systems are prone to failure, and slow meter reading speeds.

The figure is a schematic diagram of the structure of the invention

The invention provides a direct-reading remote-transmission photoelectric water meter system, including a water meter, a water meter communication system and a water meter data collection system. The water meter includes a character wheel, a photoelectric emission device, a photoelectric receiving device and a single chip computer, and the character wheel is arranged on the photoelectric emission device and the photoelectricity. In the middle of the receiving device, the single-chip microcomputer collects the photoelectric signals formed by the character wheel, optoelectronic transmitting device and optoelectronic receiving device and converts it into data; the water meter communication system adopts M-Bus bus communication, and the M-Bus bus communication checks the communication address code and transmits the data to the water meter. Data collection system; water meter data collection system for data query, verification and backup. The direct-reading remote photoelectric water meter system of the invention is compared with the conventional pulse counting remote water meter, and the photoelectric direct-reading remote water meter can always keep the mechanical code disc number consistent with the meter reading data, and there is no accumulated error.

Photoelectric direct reading remote water meter directly transmits data instead of pulse signal. It is not only not affected by mechanical vibration, but also has extremely high immunity to electromagnetic interference. Therefore, it can achieve stable, accurate and reliable measurement in a complex use environment. Because it is based on the M-Bus meter reading system, it eliminates the need for workers to copy meter by house, saving labor costs and saving time. There are four character wheels, optoelectronic emission devices and optoelectronic receiving devices, which constitute four groups of work units, representing thousands, hundred, ten, and one place. The maximum reading is 9999 tons. The number formed by the four character wheels constitutes the meter usage.

The word wheel is provided with two fan-shaped through holes, a first fan-shaped hole and a second fan-shaped hole. The parallel light emitted by the light source reaches the corresponding receiver and blocks the other emitted light. When the table wheel rotates with the user's water, a gap and a gap between the sensor and the sensor must occur. Some receivers can receive the emitted light and turn on. Some receivers do not receive the emitted light. It cannot be turned on. An infrared light emitting diode is provided on the photoemissive device, and an infrared photosensor is provided at a symmetrical position of the photoreceiving device. Infrared light emitting diodes and infrared photosensors are provided at symmetrical positions for receiving photoelectric signals. The photo-emissive device consists of five infrared light-emitting diodes and an emission circuit. The photo-reception device consists of five infrared photosensors and a receiving circuit. The photoemissive device emits light for receiving by the optoelectronic receiving device. The photosensor exhibits a low impedance state under light conditions and a high-impedance state under non-light conditions. Thus, different light is received to form different encoding states. Infrared light emitting diodes are arranged along a half circumference, and the infrared light emitting diodes located on both sides are at an angle of 18 degrees with the radius of the semicircle, and the rest of the infrared light emitting diodes are arranged at an angle of 36 degrees. The infrared light sensitive elements are symmetrically distributed on the word wheel. The other side. With this setting method, the accuracy of photoelectric signal acquisition can be improved. Anti-magnetic circuit is provided on the single-chip microcomputer. The circuit has extremely high anti-interference to electromagnetic interference, so it can be measured accurately and reliably in a complex use environment. The water meter is equipped with a flow sensor, and the flow sensor used is a Wiegand type flow sensor. The Wiegand-type flow sensor functions to provide reliable flow pulses to the microcontroller for statistical traffic. M-Bus bus communication powers the water meter. Photoelectric direct-reading remote water meter does not require power supply for daily work, and it avoids measurement errors and a large amount of maintenance due to unstable power supply or malfunction. Only when meter reading is required, power is supplied to the meter through the M-Bus bus, and the power can be turned off after the meter reading is over.

Directly read the use of remote optical water meter system, 1) start the water meter data collection system; enter the main program of the water meter data collection system, and initialize the IO port, configure the clock, communication parameters; 2) start the water meter communication system: M-Bus The communication address check, when the M-Bus communication address is checked correctly, communication is started; the communication address is checked for errors and enters the hibernation state; 3) the water meter receives the data acquisition instruction sent by the water meter data collection system; 4) the single-chip microcomputer in the water meter starts the photoelectric emission device; At the same time, the MCU receives the signal from the optoelectronic receiver; 5) Closes the optoelectronic transmitter and the optoelectronic receiver; 6) The MCU processes the acquisition signal and forms the water meter data; 7) The MCU sends the meter data to the M-Bus bus communication and uploads the meter data to the meter. Data collection system; 8) Water meter data collection system backs up water meter data.

The beneficial effect of the present invention is that the photoelectric direct reading remote water meter can always keep the mechanical code disc number consistent with the meter reading data, and there is no accumulated error. Photoelectric direct reading remote water meter directly transmits data instead of pulse signal. It is not only not subject to mechanical vibration, but also has extremely high anti-interference to electromagnetic interference, so it can achieve stable, accurate and reliable measurement in a complex use environment. With this optical water meter system, the water meter data can be directly searched in the water meter data collection system, which eliminates the need for personnel to go directly to the door and saves manpower and material resources. At the same time, the system can be backed up to help the statistics and archiving of data.

For more information, please download the full specification of the patent.

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