CN213638221U

CN213638221U - LoRaWAN teletransmission ultrasonic small-caliber water meter

Info

Publication number: CN213638221U
Application number: CN202022707816.1U
Authority: CN
Inventors: 董漪杰
Original assignee: Hangzhou Zhongpei Electronic Co ltd
Current assignee: Hangzhou Zhongpei Electronic Co ltd
Priority date: 2020-11-21
Filing date: 2020-11-21
Publication date: 2021-07-06
Anticipated expiration: 2030-11-21

Abstract

The utility model discloses a LoRaWAN teletransmission ultrasonic small-caliber water meter, which comprises a master control MCU, a LoRaWAN teletransmission module, an ultrasonic flow metering module, a local man-machine interaction module and a power supply processing module, wherein the master control MCU is used for coordinating the work of each functional module comprehensively; the LoRaWAN remote transmission module is used for realizing real-time monitoring of the condition of the water meter and real-time monitoring of the water consumption condition of a user; the local man-machine interaction module is used for installation and debugging, metering data display and LoRaWAN state indication. The utility model combines LoRaWAN and ultrasonic measurement, so that the meter not only has the characteristics of high-precision measurement, low initial flow, small pressure loss, no blockage and the like, but also adopts a wireless interface, does not need wiring, is more convenient for networking and meter reading, and simultaneously has a remote transmission function, and can realize real-time effective monitoring of the water meter; when overload instantaneous flow occurs, the user and the water company can be reminded of carrying out corresponding processing in real time, and pipe burst reminding is completed.

Description

LoRaWAN teletransmission ultrasonic small-caliber water meter

Technical Field

The utility model belongs to the instrument and meter field especially relates to a small-bore water gauge of LoRaWAN teletransmission ultrasonic wave.

Background

At present, common water meters are divided into mechanical water meters and ultrasonic water meters, the traditional mechanical water meters often have the defects of low metering precision, high initial flow, large pressure loss, easy blockage and the like, and the mechanical water meters work under overload flow for a long time and easily cause the abrasion of a machine core to cause the increase of metering errors; compared with a mechanical water meter, the ultrasonic water meter is a pure electronic water meter almost without a mechanical structure, and almost no structural part participates in metering, so that the metering performance is not influenced when the ultrasonic water meter works under overload flow for a long time; compared with the traditional mechanical water meter, the intelligent electronic part is easier to introduce, and the remote communication technology is easier to integrate; however, the conventional ultrasonic water meter needs to be provided with a cable interface for wiring, wiring is needed, networking and meter reading are troublesome, a remote transmission function is not provided, and the water meter cannot be effectively monitored in real time.

SUMMERY OF THE UTILITY MODEL

The utility model discloses a solve the defect that exists among the above-mentioned prior art and not enough, provide one kind and combine LoRaWAN and supersound measurement, make it not only possess the high accuracy measurement, low initial flow, the pressure loss is little, characteristics such as unblock, and adopt wireless interface, need not the wiring, it is more convenient to organize the net and check meter, possess the teletransmission function simultaneously, can realize the real-time effective monitoring of water gauge, when the instantaneous flow that transships appears, can pass through the wireless teletransmission mode of LoRaWAN, remind user and water utilities company to correspond the processing immediately, accomplish the LoRaWAN teletransmission ultrasonic wave small-diameter water gauge that the pipe explosion was reminded.

The technical scheme of the utility model: a LoRaWAN remote transmission ultrasonic small-caliber water meter comprises a master control MCU, a LoRaWAN remote transmission module, an ultrasonic flow metering module, a local man-machine interaction module and a power supply processing module, wherein the LoRaWAN remote transmission module, the ultrasonic flow metering module, the local man-machine interaction module and the power supply processing module are connected to the master control MCU; the LoRaWAN remote transmission module is used for realizing real-time monitoring of the condition of the water meter and real-time monitoring of the water consumption condition of a user; the local man-machine interaction module is used for installation and debugging, metering data display and LoRaWAN state indication.

The utility model combines LoRaWAN and ultrasonic measurement, which not only has the characteristics of high precision measurement, low initial flow, small pressure loss, no blockage and the like, but also adopts wireless interface, does not need wiring, is more convenient for network reading, and has remote transmission function, thereby realizing real-time effective monitoring of the water meter; when overload instantaneous flow occurs, the user and the water affair company can be reminded of carrying out corresponding processing in real time in a LoRaWAN wireless remote transmission mode, and pipe burst reminding is completed.

Preferably, the water meter is internally provided with a Flash memory of 16MBytes, and a user stores data by using 1L of water every 1 minute, and stores 30000 pieces of real-time data and 6000 days of daily water consumption data.

The utility model discloses real-time data's storage adopts FIFO's mechanism, stores 30000 data recently, and 6000 daily storage data guarantee that the instrument uses for the whole life. The water consumption of the instrument and the water consumption condition can be monitored in a full range.

Preferably, under the normal water use condition of user, this water gauge will be with water use condition data upload through LoRaWAN teletransmission module every 8 hours.

Preferably, the power supply processing module adopts a parallel structure of a battery of a lithium sub-battery ER26500 and a 1.0F super capacitor.

The utility model discloses a ER26500 provides abundant energy and carries out work for the instrument, but on the instantaneous supply current who considers the inferior battery of lithium just is in LoRaWAN needs instantaneous maximum current, we connect 1.0F's super capacitor in parallel on the battery, provide reliable instantaneous current for LoRaWAN.

Preferably, the water meter is a DN20 caliber water meter, and the initial flow rate is less than 1L/h.

When the small flow rate of single water consumption is more than 30L; when the single water consumption of the medium flow is more than 200L and the single water consumption of the large flow is more than 4000L, the water leakage of the pipeline is judged. When the meter finds the water leakage situation, the situation is immediately uploaded through a LoRaWAN network. And meanwhile, under the condition that the water flow is not stopped, data uploading is carried out once after every other flow. Until the water supply is cut off.

Drawings

FIG. 1 is a schematic block diagram of the present invention;

fig. 2 is a circuit diagram of the power supply processing module of the present invention;

FIG. 3 is a flow chart of the user water drip leakage detection function of the present invention;

fig. 4 is a flow chart for determining reverse installation of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings, but the present invention is not limited thereto.

As shown in fig. 1 and 2, the LoRaWAN remote ultrasonic small-caliber water meter comprises a main control MCU, and a LoRaWAN remote transmission module, an ultrasonic flow metering module, a local human-computer interaction module and a power supply processing module which are connected to the main control MCU, wherein the main control MCU is used for coordinating the work of each functional module; the LoRaWAN remote transmission module is used for realizing real-time monitoring of the condition of the water meter and real-time monitoring of the water consumption condition of a user; the local man-machine interaction module is used for installation and debugging, metering data display and LoRaWAN state indication. A Flash memory of 16MBytes is arranged in the water meter, and a user stores data by using 1L of water every 1 minute and stores 30000 pieces of real-time data and 6000 days of daily water consumption data. Under the normal water use condition of user, this water gauge will use water condition data upload through LoRaWAN teletransmission module every 8 hours. The power supply processing module adopts a parallel structure of a lithium sub-battery ER26500 battery and a 1.0F super capacitor. The water meter is a DN20 caliber water meter, and the initial flow is less than 1L/h.

The utility model discloses can real-time reaction user water instantaneous flow, adjust wireless frequency and the time point of uploading data in real time according to the water condition. The functions which cannot be completed by the traditional mechanical water meter are completed:

1. the water leakage detection and reminding function of the water consumption condition of the user is provided. The traditional mechanical meter is difficult to complete the water leakage detection with the instantaneous flow rate below 8L/h. The utility model discloses there is lower pickup flow to mechanical water gauge, can detect the littleer condition of leaking.

2. The pipe explosion detection and reminding function of the water use condition of the user is provided. The utility model discloses can be real-time instantaneous flow of measurement water, can be more immediate with the booster remind the user unusually.

3. The bidirectional metering and reminding functions can be completed, and the situation that the flow is not metered due to errors of field construction reverse installation and the like is avoided. Traditional mechanical water meter generally can not two-way measurement, nevertheless the utility model discloses under the condition that does not change the structure, just can realize the function of two-way measurement.

4. The functions of empty pipe detection and measurement part abnormity detection and reminding are provided, and it is ensured that each meter on site is normal and each site is quantifiable. The utility model discloses the service condition at scene can be detected to the signal quality detection function that can provide. When foreign matters exist in the pipeline, the user can be reminded immediately to carry out on-site maintenance.

5. The utility model discloses last storage device provides massive data and preserves, provides the basis for tracing back and the investigation of problem of data.

The water leakage detection flow for the user of the utility model is shown in figure 3, when the water consumption per time is less than 30L; when the single water consumption of the medium flow is more than 200L and the single water consumption of the large flow is more than 4000L, the water leakage of the pipeline is judged. When the meter finds the water leakage situation, the situation is immediately uploaded through a LoRaWAN network. And meanwhile, under the condition that the water flow is not stopped, data uploading is carried out once after every other flow. Until the water supply is cut off.

When the water meter is empty or clogged with foreign matter, ultrasonic energy is substantially attenuated in the transmission path. The ultrasonic signals are transmitted or not received, or the received signals are weak, and the ultrasonic travel time is messy. We in turn used as a judgment of an empty tube or abnormal blockage. When the situation occurs, one-time abnormal information is provided for the LoRaWAN receiving platform in real time, and the platform can judge whether the clock is in question or not according to the state of the water network system.

The utility model discloses a reverse installation is judged flow as shown in figure 4, when on-the-spot water gauge when reverse installation because construction or other reasons, can carry out reverse flow's normal measurement. And meanwhile, when 3 times of continuous reverse large and medium instantaneous flow occurs, reverse installation prompt is given. The reverse cumulative water usage can also be uploaded to the system. The reverse instantaneous flow for 3 times can avoid misjudgment of installation caused by water flow fluctuation due to instability of a water pipe network.

The LoRa is one of low-power-consumption wide area network communication technologies, and is an ultra-long-distance wireless transmission technology based on a spread spectrum technology, which is proprietary to Semtech corporation. LoRaWAN is a set of communication protocols and system architecture designed for LoRa long-distance communication networks. Which is a Medium Access Control (MAC) layer protocol.

The utility model combines LoRaWAN and ultrasonic measurement, which is two strong combinations of the technology of Internet of things in water meter application; the real-time effective monitoring of the water meter is realized; the water meter is a breakthrough of the water metering technology of users in the background of a new era in the traditional water meter, and is a concrete landing of the low-power consumption Internet of things technology in the application field of meters.

The utility model discloses compare in traditional mechanical water gauge possess high accuracy measurement, low initial flow, the pressure loss is little, characteristics such as unblock compare in conventional supersound water gauge possess LoRaWAN teletransmission technique and adopt wireless interface, need not the wiring, advantages such as the network deployment is checked meter more conveniently.

Claims

1. A LoRaWAN teletransmission ultrasonic small-caliber water meter is characterized in that: the system comprises a master control MCU, and a LoRaWAN remote transmission module, an ultrasonic flow metering module, a local man-machine interaction module and a power supply processing module which are connected to the master control MCU, wherein the master control MCU is used for coordinating the work of each functional module; the LoRaWAN remote transmission module is used for realizing real-time monitoring of the condition of the water meter and real-time monitoring of the water consumption condition of a user; the local man-machine interaction module is used for installation and debugging, metering data display and LoRaWAN state indication.

2. The LoRaWAN remote ultrasonic small-caliber water meter of claim 1, wherein: a Flash memory of 16MBytes is arranged in the water meter, and a user stores data by using 1L of water every 1 minute and stores 30000 pieces of real-time data and 6000 days of daily water consumption data.

3. The LoRaWAN remote ultrasonic small-caliber water meter of claim 1, wherein: under the normal water use condition of user, this water gauge will use water condition data upload through LoRaWAN teletransmission module every 8 hours.

4. The LoRaWAN remote ultrasonic small-caliber water meter of claim 1, wherein: the power supply processing module adopts a parallel structure of a lithium sub-battery ER26500 battery and a 1.0F super capacitor.

5. The LoRaWAN remote ultrasonic small-caliber water meter of claim 1, wherein: the water meter is a DN20 caliber water meter, and the initial flow is less than 1L/h.