CN205958051U - Thing networking flow volume correction appearance - Google Patents

Abstract

The utility model relates to an Internet of Things flow volume correction instrument. The purpose of the utility model is to provide an Internet of Things flow volume correction instrument to accurately measure the volume of gas and realize remote detection of gas consumption. The technical solution of the present utility model is: an Internet of Things flow volume correction instrument, which is characterized in that it includes a micro-control unit, a micro-control unit and a storage unit, a GPRS communication unit, a pressure sensor, a temperature sensor, a valve control circuit and an RS458 communication circuit Electrically connected; the micro control unit, pressure sensor, temperature sensor, valve control circuit and RS458 communication circuit are all powered by the battery pack; the GPRS communication unit is electrically connected to the battery pack and the multi-power supply selection circuit through the micro control unit to control the action respectively External DC power supply. The utility model is suitable for gas meters.

Description

Internet of things flow volume corrector

technical field

The utility model relates to an Internet of Things flow volume correction instrument. Suitable for gas meters.

Background technique

The volume corrector is installed on the flow meter, equipped with a temperature sensor and a pressure sensor, and receives the pulse signal from the flow meter, and uses a certain mathematical model to calculate the cumulative volume flow rate under standard reference conditions (accumulated flow rate under standard conditions for short) , and a device for displaying, storing and transmitting flow data. The temperature sensor of the volume corrector, the pressure sensor of the volume corrector, the volume corrector and the flow base meter are interconnected to form an overall intelligent flowmeter.

With the development of urban gas and the improvement of people's living standards, the number of gas residential users is increasing year by year. It is difficult for gas meter readers to enter and see the meter. They make appointments with residents and wait at home for the meter readers to go door-to-door. The efficiency of meter reading is low. This method of meter reading brings a lot of inconvenience to our daily life, and it is difficult to read meters. Troubled many gas companies.

Contents of the invention

The technical problem to be solved by the utility model is to provide an Internet of Things flow volume corrector to accurately measure gas volume and realize remote detection of gas consumption in view of the above existing problems.

The technical solution adopted by the utility model is: a flow volume corrector for the Internet of Things, characterized in that it includes a micro control unit, a micro control unit and a storage unit, a GPRS communication unit, a pressure sensor, a temperature sensor, a valve control circuit and an RS458 Communication circuit electrical connection;

The micro control unit, pressure sensor, temperature sensor, valve control circuit and RS458 communication circuit are all powered by a battery pack; the GPRS communication unit is electrically connected to the battery pack and an external DC power supply via a multi-power supply selection circuit controlled by the micro control unit .

The battery pack is electrically connected to the micro control unit via a battery voltage sampling circuit, and the external DC power supply is electrically connected to the micro control unit via a DC voltage sampling circuit.

The micro control unit is connected with a voice alarm circuit.

The beneficial effects of the utility model are: 1. The utility model collects temperature and pressure information through the temperature sensor and the pressure sensor to correct the gas consumption. 2. The utility model sends the corrected gas consumption information to the cloud server through the GPRS communication unit, and the meter reading personnel can read the meter wirelessly without entering the user's home, reducing the difficulty of meter reading. 3. Due to the large power consumption of GPRS communication, the utility model is a utility model that supplies power to the GPRS communication unit through an external DC power supply and a battery pack, and temporarily calls the battery pack to supply power to the GPRS communication unit without an external power supply to ensure smooth communication , Improve the reliability of the flowmeter.

Description of drawings

Fig. 1 is a circuit block diagram of the embodiment.

detailed description

As shown in Figure 1, the present embodiment is a flow volume correction instrument for the Internet of Things, including a micro control unit 1, a storage unit 2 electrically connected to the micro control unit, a GPRS communication unit 3, a valve control circuit 6, and a voice alarm circuit 7 , pressure sensor 14, temperature sensor 15 and RS458 communication circuit 17, the above-mentioned components and parts are all powered by battery pack 8 in this embodiment.

Because the power consumption of GPRS communication is relatively large, GPRS communication unit 3 also adopts external DC power supply 11 to supply power to it in the present embodiment, and GPRS communication unit 3 links to each other with battery pack 8 and external DC power supply 11 through multi-power supply selection circuit 13, multi-power supply selection The circuit 13 is electrically connected to the micro control unit 1, and the micro control unit 1 controls the multi-power supply selection circuit 13 to select the battery pack 8 and the GPRS communication unit 3 or the external DC power supply 11 and the GPRS communication unit 3 to be powered.

In this embodiment, the battery pack 8 is electrically connected to the micro control unit 1 via the battery voltage sampling circuit 9 , and the external DC power supply 11 is electrically connected to the micro control unit 1 via the DC voltage sampling circuit 12 . The micro-control unit 1 samples the voltage of the battery pack 8 through the battery voltage sampling circuit 9, and sends an alarm through the voice alarm circuit 7 when the battery pack 8 is low in power; samples the voltage of the external DC power supply 11 through the DC voltage sampling circuit 12, and connects the external DC When the voltage of the power supply 11 is insufficient, the multi-power supply selection circuit 13 is controlled to switch the battery pack 8 to supply power for the GPRS communication unit 3 .

In the absence of external power access, due to the large power consumption of GPRS communication, the meter end does not support the GPRS real-time online function, and the communication server of the master station cannot communicate with the meter end at any time for data exchange, but the interval data upload function can be set for the meter end , such as uploading several times a month, the number of times should not be too much, so as not to exhaust the battery pack 8 quickly. Under the condition of external power access, the GPRS interface is automatically enabled, and the meter terminal will automatically log in to the meter reading system of the master station server, and the server can communicate with the meter terminal in real time. When the external power is cut off, the meter end will upload data immediately, and notify the system that the meter end is not connected to the external power state.

The working principle of this embodiment is as follows: this embodiment communicates with the flow base meter through the RS458 communication circuit 17, obtains the gas consumption information collected by the flow base meter, and carries out the gas consumption in combination with the temperature and pressure information collected by the pressure sensor 14 and the temperature sensor 15. Amended, and the amended usage information is uploaded to the cloud server through the GPRS communication unit 3.

Of course, the above description is not a limitation of the present utility model, and the present utility model is not limited to the above-mentioned examples. Those of ordinary skill in the art, within the scope of the present utility model, make changes, additions or replacements, which should belong to Protection scope of the present utility model.

Claims (3)

1. a kind of Internet of things flow volume correction instrument is characterized in that: comprise micro-control unit (1), micro-control unit and storage unit (2), GPRS communication unit (3), pressure sensor (14), temperature sensor (15 ), valve control circuit (6) and RS458 communication circuit (17) are electrically connected; Described micro control unit (1), pressure sensor (14), temperature sensor (15), valve control circuit (6) and RS458 communication circuit (17) are all powered by battery pack (8); Described GPRS communication unit (3 ) is electrically connected to the battery pack (8) and the external DC power supply (11) via the multi-power supply selection circuit (13) controlled by the micro control unit (1). 2. The Internet of Things flow volume corrector according to claim 1, characterized in that: the battery pack (8) is electrically connected to the micro-control unit (1) via a battery voltage sampling circuit (9), and the external DC The power supply (11) is electrically connected to the micro control unit (1) via a DC voltage sampling circuit (12). 3. The Internet of Things flow volume corrector according to claim 1 or 2, characterized in that: said micro control unit (1) is connected with a voice alarm circuit (7).