Today, I will introduce a national invention authorized patent-a fast and high-precision photoelectric direct-reading smart water meter system. The patent was applied for by Yangzhou Henglong Software Co., Ltd., and the authorization was announced on February 8, 2017.
Content descriptionThe utility model relates to the field of water meters, in particular to a fast and high-precision photoelectric direct-reading intelligent water meter system.
Background of the inventionWater meter is an important measuring instrument related to people's livelihood. In recent years, urban construction has developed rapidly, but the development of water meter industry has been relatively slow. With the development of microelectronic technology and information technology, the development of smart water meter technology has entered the fast lane, and various new technologies have been used in endlessly.
There are currently more than 600 water meter manufacturers in my country. Although downstream users of water plants and real estate companies are very scattered, the competition is still fierce. The camera direct-reading remote water meter product was first developed by Beijing Beibao Electric Co., Ltd. in 2008. Due to the immature image transmission and digital decoding aspects, the product has not been popularized. The second-generation product was developed by Guangdong Huaxu and other companies in 2001. It solved the technical problems of image processing, image transmission and decoding transmission, making this technology a breakthrough. At present, the product has been put into small batch production. , And put it on trial in Beijing and other places. Large-scale promotion has yet to be tested by application time and application quantity.
Although direct-reading water meters and their meter reading systems have appeared on the market, problems such as slow meter reading speed, easy misreading, and environmental light effects still exist.
Summary of the inventionIn order to solve the above technical problems, the purpose of the present invention is to provide a fast and high-precision photoelectric direct-reading smart water meter system, which overcomes the ubiquitous complex structure of the existing remote-transmission direct-reading water meter, and is easily interfered by external light. Interference between adjacent transmission tubes, bus-type meter reading system is prone to failure, meter reading speed is slow and other problems.
In order to achieve the above-mentioned purpose of the invention, the present utility model provides the following technical solutions: a fast and high-precision photoelectric direct-reading intelligent water meter system, which is mainly composed of multiple terminal water meters, a meter reading concentrator, and a meter reading management system. The terminal water meter Including a single-chip microcomputer and multiple word wheel units, each word wheel unit includes a mechanical word wheel and multiple groups of light emitting and receiving pairs of tubes, each group of light emitting and receiving pairs of tubes uses a unique orthogonal code between the transmitting tube and the receiving tube Serial CDMA signal communication connection, each code of the orthogonal code sequence CDMA signal also adopts Manchester encoding to make it jump, and the single-chip microcomputer drives the transmitting tube of each group of light transmitting and receiving pair tubes to send a signal to the receiving tube.
In the above technical solution, the mechanical character wheel adopts a transmissive code disc, and the transmissive code disc includes a disc body and a plurality of light-transmitting holes sequentially arranged in the circumferential direction and passing through the disc surfaces on both sides of the disc body. The emitting tube and the receiving tube of the light emitting and receiving tube are respectively located on both sides of the disk body and projected on the circumferential position. Each character wheel unit includes 5 groups of light emitting and receiving pairs of tubes, and the 5 emitting tubes of the 5 groups of light emitting and receiving pairs of tubes are arranged in sequence along the semicircular direction, and are located on the two adjacent sides of the two emitting tubes at the two ends of the semicircular direction. An included angle of 180 degrees is formed between the two launch tubes located at the two ends of the half-circle direction, and an included angle of 36 degrees is formed between the two adjacent sides of the two adjacent launch tubes. The remaining three launch tubes An included angle of 36 degrees is formed between the two adjacent sides. The five receiving tubes of the 5 groups of light emitting and receiving pairs are arranged in sequence along the semicircular direction, between the two adjacent sides of the two receiving tubes at the two ends of the semicircular direction. An included angle of 180 degrees is formed. The two receiving tubes located at the two ends of the half-circle direction respectively form an included angle of 36 degrees with the adjacent two sides of the two adjacent receiving tubes. The remaining three receiving tubes are adjacent An included angle of 36 degrees is formed between the two sides.
The meter reading concentrator and the multiple terminal water meters are powered by M_BUS bus communication, and are connected by GPRS or Ethernet communication connected to the internet. At the same time, the meter reading concentrator polling and the terminal water meter independent communication are combined. The meter reading concentrator sets the communication sequence of each terminal water meter. When the next terminal water meter detects that the previous terminal water meter communication is completed, the next terminal water meter The collected information is sent immediately. When the meter reading concentrator finds that the communication data of the individual terminal water meter is wrong, the M_BUS bus is also connected with a DC/DC DC chopper in a separate call communication mode.
Each terminal water meter is provided with a unique two-dimensional code. The fast and high-precision photoelectric direct-reading smart water meter system also includes a handheld meter reader. The handheld meter reader and the terminal water meter interact with each other through a QR code. Identify and communicate with the meter reading concentrator. The handheld meter reader is a smart phone or a dedicated terminal device, and the smart phone or the dedicated terminal device is installed with a set APP. The single-chip microcomputer is a microprocessor with a solidification program capable of performing prepayment, segmented metering, and segmented pricing functions.
Due to the application of the above technical solutions, the present utility model has the following advantages compared with the prior art: the emission signal of each emission tube is not a simple pulse signal with light and no light, but a selected orthogonal code sequence. Each code uses Manchester coding to ensure that each code has a jump and eliminates the influence of environmental factors; while different transmitting tubes use different orthogonal code sequences to eliminate adjacent interference; it solves the current difficulty in low-cost methods. The adjacent interference between different transmitting and receiving pairs of tubes and the interference of external environment transmitted light on the reading are solved under the following; by improving the bus drive, the communication rate of communication is improved, and on this basis, a special purpose with a combination of polling and autonomous transmission is developed. The communication protocol greatly reduces the waiting time for polling during meter reading, thereby greatly improving the meter reading speed, improving meter reading efficiency, and extending the life of the concentrator battery. In this utility model, the meter reading speed is reduced to 40ms Left and right; the static power consumption of the meter reading concentrator<5W; the static power of the water meter terminal<4mA; when the meter reading concentrator fails, the image recognition technology and the two-dimensional code technology are used to realize the meter reading when the water meter is out of power. The two-dimensional code can be used to The unique identification of the water meter and the easy positioning of the two-dimensional code solves the problem of digital positioning of the water meter. The camera of the smart phone is used to realize low-cost image-based meter reading; by setting prepaid modules, segmented metering modules and segmented pricing The module enables the water meter system to have the functions of prepayment, segmented metering, and segmented pricing; the stepped water volume is not less than three levels to meet the national requirements for stepped water pricing.
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