CN220185980U - Wireless external valve circuit based on LoRa communication - Google Patents

Abstract

The utility model relates to the technical field of intelligent gas safety, and particularly discloses a wireless external valve circuit based on LoRa communication, which comprises a main controller, a valve control module, a key module, a LoRa communication module and a power supply module, wherein the valve control module, the key module and the LoRa communication module are electrically connected with the main controller, and the power supply module is electrically connected with the main controller, the valve control module, the key module and the LoRa communication module respectively; the main controller comprises a main controller chip, a resistor R10, a capacitor C8 and a downloading port, wherein one end of the resistor R10 is connected with a 3.3V power supply, the other end of the resistor R10 is connected with the capacitor C8, a fourth pin of the main controller chip is connected between the resistor R10 and the capacitor C8, and the downloading port is respectively connected with a third pin and a fourth pin of the main controller chip. The utility model has compact structure, can effectively meet the long-term stable data communication using requirement of the gas external valve, has wide application range, reduces the using cost, has high efficiency, and is safe and reliable.

Description

Wireless external valve circuit based on LoRa communication

Technical Field

The utility model relates to the technical field of intelligent gas safety, in particular to a wireless external valve circuit based on LoRa communication.

Background

At present, with the continuous improvement of science and technology, the residential community gradually develops to an intelligent and digital direction, and in recent years, natural gas is increasingly applied to the residential community, but the gas safety problem also becomes more and more interesting for society.

At present, the existing gas pipeline valve is opened and closed either through mechanical and manual operation, is inconvenient to operate and difficult to operate in real time, or is controlled in a traditional wired mode, so that wiring is quite inconvenient and attractive, and user experience is poor. Moreover, when gas leakage occurs or the gas valve is forgotten to be closed when the gas valve goes out, the gas valve cannot be closed timely, and the requirement of safe and intelligent use of the gas valve of the current resident user is difficult to be met.

Disclosure of Invention

In order to solve the defects in the prior art, the utility model provides the wireless external valve circuit based on LoRa communication, which has a compact structure, can effectively meet the long-term stable data communication use requirement of the gas external valve, has a wide application range, reduces the use cost, has high efficiency, and is safe and reliable.

As a first aspect of the present utility model, a wireless external valve circuit based on LoRa communication is provided, which includes a main controller, a valve control module, a key module, a LoRa communication module and a power supply module, wherein the valve control module, the key module and the LoRa communication module are all electrically connected with the main controller, and the power supply module is electrically connected with the main controller, the valve control module, the key module and the LoRa communication module respectively; the main controller comprises a main controller chip U2, a resistor R10, a capacitor C8 and a program downloading port X2, wherein one end of the resistor R10 is connected with a 3.3V power supply, the other end of the resistor R10 is connected with one end of the capacitor C8, the other end of the capacitor C8 is grounded, a fourth pin of the main controller chip U2 is connected between the resistor R10 and the capacitor C8, and the program downloading port X2 is respectively connected with a third pin and a fourth pin of the main controller chip U2.

Further, the valve control module comprises a valve control chip U1, a capacitor C6, a capacitor C7 and a two-wire electromagnetic valve X1, one end of the capacitor C6 is connected with a first pin of the valve control chip U1, the other end of the capacitor C6 is grounded, one end of the capacitor C7 is connected with an eighth pin of the valve control chip U1, the other end of the capacitor C7 is grounded, the two-wire electromagnetic valve X1 is respectively connected with a second pin and a third pin of the valve control chip U1, a fourth pin and a zero pin of the valve control chip U1 are grounded, and a fifth pin, a sixth pin and a seventh pin of the valve control chip U1 are respectively connected to a thirteenth pin, a twelfth pin and an eleventh pin of the main controller U2.

Further, the key module includes a key P2 and a resistor R3, one end of the resistor R3 is connected to a 3.3V power supply, the other end is connected to a first pin of the key P2, the first pin of the key P2 is further connected to a fifth pin of the main controller chip U2, and a second pin of the key P2 is grounded.

Further, the LoRa communication module comprises an electrostatic resistor VD1, an antenna A1, a resistor R1, a capacitor C9 and a LoRa communication module U3, one end of the electrostatic resistor VD1 is connected with the antenna A1, the other end of the electrostatic resistor VD1 is grounded, the antenna A1 is connected to an RF pin of the LoRa communication module U3 through the resistor R1, a VCC pin of the LoRa communication module U3 is connected with one end of the capacitor C9, and the other end of the capacitor C9 is grounded.

Further, the power supply module comprises a dry battery P1, a resistor R5, a resistor R6, a capacitor C1, a level conversion chip D1, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C5, wherein the positive electrode of the dry battery P1 is respectively connected with one end of the resistor R5, one end of the capacitor C1 and a third pin of the level conversion chip D1, the negative electrode of the dry battery P1 is grounded, the other end of the resistor R5 is connected with one end of the resistor R6, the other end of the resistor R6 is grounded, the other end of the capacitor C1 is grounded, and two ends of the capacitor C2, two ends of the capacitor C4 and two ends of the capacitor C5 are respectively connected with a first pin and a second pin of the level conversion chip D1.

Further, the level conversion chip D1 is an LDO chip or a DCDC chip.

The wireless external valve circuit based on LoRa communication has the following advantages: the structure is compact, the long-term stable data communication requirement of the gas external valve can be effectively met, the application range is wide, the use cost is reduced, the efficiency is high, and the safety and the reliability are realized.

Drawings

The accompanying drawings are included to provide a further understanding of the utility model, and are incorporated in and constitute a part of this specification, illustrate the utility model and together with the description serve to explain, without limitation, the utility model.

Fig. 1 is a block diagram of a wireless external valve circuit based on LoRa communication.

Fig. 2A to 2C are schematic circuit diagrams of a main controller according to the present utility model.

Fig. 3 is a schematic circuit diagram of a valve control module according to the present utility model.

Fig. 4 is a schematic circuit diagram of a key module according to the present utility model.

Fig. 5 is a schematic circuit diagram of the LoRa communication module provided by the utility model.

Fig. 6 is a schematic circuit diagram of a power supply module according to the present utility model.

Fig. 7 is a flow chart of operation of the wireless external valve circuit based on LoRa communication provided by the utility model.

Reference numerals illustrate: 1-a main controller; 2-a valve control module; 3-a key module; a 4-LoRa communication module; and 5-a power supply module.

Detailed Description

In order to further describe the technical means and effects adopted by the utility model to achieve the preset aim, the following detailed description refers to the specific implementation, structure, characteristics and effects of a wireless external valve circuit based on LoRa communication according to the utility model with reference to the accompanying drawings and the preferred embodiments. It will be apparent that the described embodiments are some, but not all, embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to fall within the scope of the utility model.

It should be noted that the terms "first," "second," and the like in the description and the claims of the present utility model and the above figures are used for distinguishing between similar objects and not necessarily for describing a particular sequential or chronological order. It is to be understood that the data so used may be interchanged where appropriate in order to describe the embodiments of the utility model herein. Furthermore, the terms "comprises," "comprising," and "having," and any variations thereof, are intended to cover a non-exclusive inclusion, such that a process, method, system, article, or apparatus that comprises a list of steps or elements is not necessarily limited to those steps or elements expressly listed but may include other steps or elements not expressly listed or inherent to such process, method, article, or apparatus.

In the explanation of the present utility model, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly, unless otherwise indicated. For example, the connection may be a fixed connection, or may be a connection through a special interface, or may be an indirect connection via an intermediary. The specific meaning of the above terms in the present utility model will be understood in specific cases by those of ordinary skill in the art.

In this embodiment, as shown in fig. 1-2, the wireless external valve circuit based on the LoRa communication includes a main controller 1, a valve control module 2, a key module 3, a LoRa communication module 4, and a power supply module 5, where the valve control module 2, the key module 3, and the LoRa communication module 4 are all electrically connected with the main controller 1, and the power supply module 5 is electrically connected with the main controller 1, the valve control module 2, the key module 3, and the LoRa communication module 4; the main controller 1 comprises a main controller chip U2, a resistor R10, a capacitor C8 and a program downloading port X2, one end of the resistor R10 is connected with a 3.3V power supply, the other end of the resistor R10 is connected with one end of the capacitor C8, the other end of the capacitor C8 is grounded, a fourth pin of the main controller chip U2 is connected between the resistor R10 and the capacitor C8, and the program downloading port X2 is respectively connected with a third pin and a fourth pin of the main controller chip U2 to realize a program downloading function. The fourth pin of the main controller chip U2 is a reset pin, and the third pin of the main controller chip U2 is a program download pin.

In this embodiment, the main controller 1 may be an MCU capable of running an embedded operating system, which is commonly used in the art, or may be an STM8L051 processor of ST company and a peripheral circuit as required.

Preferably, as shown in fig. 3, the valve control module 2 includes a valve control chip U1, a capacitor C6, a capacitor C7, and a two-wire electromagnetic valve X1, one end of the capacitor C6 is connected to a first pin of the valve control chip U1, the other end of the capacitor C6 is grounded, one end of the capacitor C7 is connected to an eighth pin of the valve control chip U1, the other end of the capacitor C7 is grounded, the two-wire electromagnetic valve X1 is respectively connected to a second pin and a third pin of the valve control chip U1, a fourth pin and a zeroth pin of the valve control chip U1 are grounded, and a fifth pin, a sixth pin and a seventh pin of the valve control chip U1 are respectively connected to a thirteenth pin, a twelfth pin and an eleventh pin of the main controller U2.

In this embodiment, the valve control chip U1 may be a DRV8837 model dc motor driving chip of TI company.

Preferably, as shown in fig. 4, the key module 3 includes a key P2 and a resistor R3, wherein one end of the resistor R3 is connected to a 3.3V power supply, the other end is connected to a first pin of the key P2, the first pin of the key P2 is further connected to a fifth pin of the main controller chip U2, and a second pin of the key P2 is grounded.

In this embodiment, the key P2 may be a key switch or a button commonly used in products, for example, the key P2 may be a two-contact switch key conforming to a valve structure.

Preferably, as shown in fig. 5, the LoRa communication module 4 includes an electrostatic resistor VD1, an antenna A1, a resistor R1, a capacitor C9, and a LoRa communication module U3, one end of the electrostatic resistor VD1 is connected to the antenna A1, the other end of the electrostatic resistor VD1 is grounded, so as to play a role of preventing static electricity, the antenna A1 is further connected to an RF pin of the LoRa communication module U3 through the resistor R1, the resistor R1 is attached to a 0 ohm resistor, a VCC pin of the LoRa communication module U3 is connected to one end of the capacitor C9, the other end of the capacitor C9 is grounded, and the VCC pin of the LoRa communication module U3 is further connected to a 3.3V power supply, so as to provide power. GND pin of the LoRa communication module U3 is grounded; the LORA_SCLK pin, the LORA_SPISSN pin, the LORA_SIMO pin and the LORA_SOMI pin of the LoRa communication module U3 are respectively connected with the SPI corresponding pins of the main controller chip U2, and the main controller U2 realizes communication with the LoRa communication module U3 through the SPI pins; the LORA_NRESET pin, the LORA_DIO0 pin, the LORA_DIO1 pin and the LORA_DIO3 pin of the LoRa communication module U3 are respectively connected with the IO pin of the main controller chip U2, and the main controller chip U2 resets the LoRa communication module U3 and receives an interrupt signal of the LoRa communication module U3 through corresponding IO pins.

In this embodiment, the LoRa communication module 4 may be a LoRa communication module based on SX1278 chip by rilda corporation.

Preferably, as shown in fig. 6, the power supply module 5 includes a dry battery P1, a resistor R5, a resistor R6, a capacitor C1, a level conversion chip D1, a capacitor C2, a capacitor C3, a capacitor C4, and a capacitor C5, where an anode of the dry battery P1 is connected to one end of the resistor R5, one end of the capacitor C1, and a third pin of the level conversion chip D1, a cathode of the dry battery P1 is grounded, another end of the resistor R5 is connected to one end of the resistor R6, another end of the resistor R6 is grounded, and two ends of the capacitor C2, two ends of the capacitor C3, two ends of the capacitor C4, and two ends of the capacitor C5 are respectively connected to a first pin and a second pin of the level conversion chip D1.

In this embodiment, the level conversion chip D1 is an LDO or DC-DC device well known to those skilled in the art, and the power supply module 5 can use the level conversion chip D1 to step down to meet the operating voltage requirement of each module.

Specifically, the dry battery P1 may be replaced by a lithium battery, and the level conversion chip D1 drops the voltage of the dry battery or the lithium battery to a stable voltage suitable for the main controller and other devices.

In this embodiment, the communication mode between the main controller 1 and the valve control module 2 may be a common GPIO port connection or serial port, but is not limited to the above two modes. The valve in the valve control module 2 may be a conventional electromechanical valve or a solenoid valve. The number of tasks and the order of operation of the utility model are within the scope of the claims.

In this embodiment, the main controller 1 receives the LoRa valve closing command and transmits the valve closing response command through the LoRa communication module 4. The communication mode between the main controller 1 and the LoRa communication module 4 may be, but not limited to, SPI, serial port, I2C, etc.

As shown in fig. 1, the working principle of the wireless external valve circuit based on LoRa communication provided by the utility model is as follows: the main controller 1 completes the function of opening the valve by the key through the key module 3. The main controller 1 transmits and receives the LoRa wireless data through the LoRa communication module 4. The LoRa communication module 4 forwards the received LoRa wireless data to the main controller 1. The LoRa communication module 4 transmits data to be wirelessly transmitted to the flammable gas detector by the main controller 1. The main controller 1 detects whether a key in the key module 3 is pressed or not through interruption, and if the key is pressed, the main controller 1 issues a valve opening command to the valve control module 2. The main controller 1 is connected with the valve control module 2, and can realize the functions of closing and opening the valve. The power supply module 5 provides power required for other module operation. When the combustible gas detector detects that the gas leaks, wireless valve closing command data can be sent through the LoRa, when a user needs to remotely close a valve outside, the valve is closed through a mobile phone applet or a short message, and the LoRa gas meter reading gateway can also send the LoRa valve closing command data.

Specifically, the LoRa communication module 4 receives the valve closing command data, and reminds the main controller 1 of receiving the data through interruption, and the main controller 1 reads the LoRa communication module 4 to receive the LoRa valve closing command data through an SPI interface. The main controller 1 checks the integrity and the correctness of the data, and after the data is determined to be free of problems, the valve control module 2 performs valve closing processing, and then the main controller 1 sends response valve closing data through the LoRa communication module 4. After the problem of gas leakage is solved or after the user returns home to confirm safety, the valve can be opened through the key, and after the main controller 1 detects the interruption sent by the key module 3, the valve opening action is performed through the valve control module 2.

As shown in fig. 7, the operation flow of the wireless external valve circuit based on LoRa communication provided by the utility model is as follows: after the system is electrified, the main controller 1 firstly initializes the valve control module 2, the key module 3 and the LoRa communication module 4, after the initialization is finished, the main controller 1 monitors whether the LoRa data exists in the air through the LoRa communication module 4, if the LoRa data exists in the air, whether the key module 3 presses a key is judged, if the key does not press, the main controller 1 and the LoRa communication module 4 enter a low-power consumption intermittent monitoring mode, the main controller 1 can exit dormancy every few seconds to continuously detect whether the LoRa data exists and whether the key presses, and the cycle is performed. If the main controller 1 detects that the key module 3 presses a key, the valve control module 2 firstly executes valve opening action, and then the main controller 1 and the LoRa communication module 4 enter a low-power consumption and intermittent interception mode. If the LoRa communication module 4 detects the LoRa data preamble, the LoRa communication module 4 receives the LoRa data from the CAD cycle listening mode to the receiving mode. The main controller 1 reads the data received by the LoRa communication module 4, checks whether the data is complete and correct and is sent to the equipment, if so, the valve closing action is carried out through the valve control module 2, and valve closing response data is sent through the LoRa communication module 4; if not, the main controller 1 and the LoRa communication module 4 enter the low power consumption and intermittent interception mode again, and wait for the next detection period time to come, and the cycle is performed.

The wireless external valve circuit based on LoRa communication has the characteristic of low power consumption, the main controller 1 is in a dormant state at ordinary times, the LoRa communication module 4 is in a CAD mode, a receiving window is opened every few seconds in the mode to sense whether LoRa data exist in the air, the receiving mode is switched to receive the data, the main controller 1 is notified after the data is received, the main controller 1 is changed into an operation state from the dormant state, and then the data is read through an SPI interface. The low-power consumption characteristic can meet the long-term stable use under the condition of power supply of the LoRa wireless valve battery.

The utility model can effectively solve the problems that the gas valve in the prior art needs to be manually opened and closed and can not be automatically and remotely closed when the gas valve is dangerous, effectively improves the gas safety, and has the advantages of compact structure, high efficiency, wide application range, reduced use cost, safety and reliability.

The wireless external valve circuit based on LoRa communication for the gas pipeline can realize that the wireless meter reading equipment or the wireless alarm and other equipment can open or close the gas external valve. When a user forgets to turn off the fire when boiling water and cooking, the external gas valve can be closed through the remote terminals such as a mobile phone and the like through the LoRa wireless gateway equipment or the wireless combustible gas detector. When the gas leakage and other conditions occur, the external valve can be closed in time by wirelessly receiving the data of the wireless gas detector, so that the danger is avoided. The household gas safety device has the advantages of high reliability and easy maintenance, effectively protects the long-term safe use of household gas, protects the life and property safety of residents, has wide application range, reduces the use cost, and is safe and reliable.

The present utility model is not limited to the above-mentioned embodiments, but is intended to be limited to the following embodiments, and any modifications, equivalents and modifications can be made to the above-mentioned embodiments without departing from the scope of the utility model.

Claims (6)

1. The wireless external valve circuit based on LoRa communication is characterized by comprising a main controller (1), a valve control module (2), a key module (3), a LoRa communication module (4) and a power supply module (5), wherein the valve control module (2), the key module (3) and the LoRa communication module (4) are electrically connected with the main controller (1), and the power supply module (5) is electrically connected with the main controller (1), the valve control module (2), the key module (3) and the LoRa communication module (4) respectively; the main controller (1) comprises a main controller chip U2, a resistor R10, a capacitor C8 and a program downloading port X2, one end of the resistor R10 is connected with a 3.3V power supply, the other end of the resistor R10 is connected with one end of the capacitor C8, the other end of the capacitor C8 is grounded, a fourth pin of the main controller chip U2 is connected between the resistor R10 and the capacitor C8, and the program downloading port X2 is respectively connected with a third pin and a fourth pin of the main controller chip U2.

2. The wireless external valve circuit based on LoRa communication according to claim 1, wherein the valve control module (2) comprises a valve control chip U1, a capacitor C6, a capacitor C7 and a two-wire electromagnetic valve X1, one end of the capacitor C6 is connected with a first pin of the valve control chip U1, the other end of the capacitor C6 is grounded, one end of the capacitor C7 is connected with an eighth pin of the valve control chip U1, the other end of the capacitor C7 is grounded, the two-wire electromagnetic valve X1 is respectively connected with a second pin and a third pin of the valve control chip U1, a fourth pin and a zero pin of the valve control chip U1 are grounded, and a fifth pin, a sixth pin and a seventh pin of the valve control chip U1 are respectively connected to a thirteenth pin, a twelfth pin and an eleventh pin of the main controller U2.

3. The wireless external valve circuit based on LoRa communication according to claim 1, wherein the key module (3) comprises a key P2 and a resistor R3, one end of the resistor R3 is connected to a 3.3V power supply, the other end is connected to a first pin of the key P2, the first pin of the key P2 is further connected to a fifth pin of the main controller chip U2, and a second pin of the key P2 is grounded.

4. The wireless external valve circuit based on LoRa communication according to claim 1, wherein the LoRa communication module (4) comprises an electrostatic resistor VD1, an antenna A1, a resistor R1, a capacitor C9 and a LoRa communication module U3, one end of the electrostatic resistor VD1 is connected with the antenna A1, the other end of the electrostatic resistor VD1 is grounded, the antenna A1 is further connected to an RF pin of the LoRa communication module U3 through the resistor R1, a VCC pin of the LoRa communication module U3 is connected with one end of the capacitor C9, and the other end of the capacitor C9 is grounded.

5. The wireless external valve circuit based on LoRa communication according to claim 1, wherein the power supply module (5) comprises a dry battery P1, a resistor R5, a resistor R6, a capacitor C1, a level conversion chip D1, a capacitor C2, a capacitor C3, a capacitor C4 and a capacitor C5, wherein the positive electrode of the dry battery P1 is respectively connected with one end of the resistor R5, one end of the capacitor C1 and a third pin of the level conversion chip D1, the negative electrode of the dry battery P1 is grounded, the other end of the resistor R5 is connected with one end of the resistor R6, the other end of the resistor R6 is grounded, the other end of the capacitor C1 is grounded, and two ends of the capacitor C2, two ends of the capacitor C3, two ends of the capacitor C4 and two ends of the capacitor C5 are respectively connected with a first pin and a second pin of the level conversion chip D1.

6. The wireless external valve circuit based on LoRa communication according to claim 5, wherein the level conversion chip D1 is an LDO chip or a DCDC chip.