Low-power-consumption infrared communication system of gas meter, gas meter controller and gas meter

Abstract

The utility model belongs to the technical field technical field of gas meter infrared communication technology field, the utility model provides a kind of low-power gas meter infrared communication system, it includes main control module, infrared receiving module, infrared transmitting module, key trigger module, power module, key trigger module is electrically connected with main control module, main control module is electrically connected with infrared receiving module and infrared transmitting module, infrared receiving module includes IRCTRL pin, infrared receiving circuit and IRIN pin, first control circuit is arranged between IRCTRL pin and infrared receiving circuit, infrared transmitting module includes IROUT pin and infrared transmitting circuit, second control circuit is arranged between IROUT pin and infrared transmitting circuit.The utility model among them gas meter infrared communication system, circuit design is simple, the quantity of component used is less, and hardware design cost is low, can close infrared module under non-communication state, effectively prolongs the service life of gas meter, and maintenance cost is reduced.

Description

Technical Field

[0001] This utility model belongs to the field of infrared communication technology for gas meters, specifically relating to a low-power infrared communication system for gas meters, a gas meter controller, and a gas meter. Background Technology

[0002] Traditional gas meters have long relied on manual on-site meter reading, requiring gas company staff to visit each household to record gas usage data. This method suffers from inefficiency, high labor costs, and is prone to misreading and missed reporting, especially when users are not at home. With the development of IoT technology, smart gas meters are gradually replacing traditional mechanical meters, with remote gas meters based on NB-IoT narrowband IoT technology becoming the mainstream solution.

[0003] However, purely remote communication cannot meet all the needs of gas meter lifecycle management. The following pain points still exist in actual deployment and operation: On-site commissioning and maintenance rely on dedicated equipment: technicians need to carry computers for parameter configuration, which is cumbersome and involves heavy tools; Communication vacuum in scenarios without network coverage: remote control is completely ineffective when the NB-IoT signal is weak or the base station fails; Timeliness requirements for emergency operations: in emergencies such as gas leaks, remote commands may not be responded to in a timely manner due to network latency; Physical isolation requirements for security authentication: highly sensitive operations (such as key updates) need to avoid relying on wireless channels to prevent man-in-the-middle attacks.

[0004] To address these challenges, there is an urgent need for a reliable means of short-range communication to form a dual-mode communication architecture of "long-range transmission + near-field" with NB-IoT gas meters.

[0005] Infrared communication technology, as a mature and widely used short-range wireless communication technology, plays an increasingly important role in production and daily life. However, existing infrared communication technologies also have some obvious drawbacks, such as complex circuit design, a large number of components, high hardware design costs, limited circuit functionality, and high power consumption. These shortcomings limit its application in large-scale communication, especially in smart gas meters that require long-term operation or operate in complex environments. Utility Model Content

[0006] In order to overcome the shortcomings of the prior art, this utility model provides a low-power gas meter infrared communication system with low power consumption characteristics that can be applied to gas meters, a gas meter controller with the infrared communication system, and a gas meter.

[0007] This utility model is achieved through the following technical solution.

[0008] This invention provides a low-power infrared communication system for a gas meter, applied in a gas meter. It includes a main control module, an infrared receiving module, an infrared transmitting module, a button triggering module, and a power supply module. The power supply module supplies power to each module. The button triggering module is electrically connected to the main control module and sends an infrared start signal to it. The main control module is electrically connected to both the infrared receiving module and the infrared transmitting module. Upon receiving a button signal, the main control module sends a control signal to either the infrared receiving module or the infrared transmitting module. The infrared receiving module includes an IRCTRL pin, an infrared receiving circuit, and an IRIN pin. The IRCTRL pin is connected to the infrared receiving module... A first control circuit is provided between the receiving circuits to control the on / off state of the infrared receiving circuit. The infrared receiving module receives control signals from the main control module through the IRCTRL pin, interacts with the infrared handheld device through the infrared receiving circuit, and sends data received from external devices to the main control module through the IRIN pin. The infrared transmitting module includes an IROUT pin and an infrared transmitting circuit. A second control circuit is provided between the IROUT pin and the infrared transmitting circuit to control the on / off state of the infrared transmitting circuit. The infrared transmitting circuit interacts with the infrared handheld device, and the infrared transmitting module can receive control signals and data from the main control module through the IROUT pin.

[0009] As a further improvement to the above scheme, the first control circuit includes a current-limiting resistor R1 and a PMOS transistor T1. One end of the current-limiting resistor R1 is connected to the IRCTRL pin, and the other end of the current-limiting resistor R1 is connected to the gate (G) of the PMOS transistor T1. The source (S) of the PMOS transistor T1 is connected to the power supply module, and the drain (D) of the PMOS transistor T1 is connected to the infrared transmitting circuit. The second control circuit includes a current-limiting resistor R3 and a PMOS transistor T2. One end of the current-limiting resistor R3 is connected to the IROUT pin, and the other end of the current-limiting resistor R3 is connected to the gate (G) of the PMOS transistor T2. The source (S) of the PMOS transistor T2 is connected to the power supply module, and the drain (D) of the PMOS transistor T2 is connected to the infrared transmitting circuit.

[0010] As a further improvement to the above scheme, the infrared receiving circuit includes a pull-up resistor R2, an infrared receiving transistor U1, and a transistor Q. One end of the pull-up resistor R2 is connected to the drain of the PMOS transistor T1 and the collector of the infrared receiving transistor U1, respectively. The other end of the pull-up resistor R2 is connected to the collector of the transistor Q. The IRIN pin is located in the circuit between the pull-up resistor R2 and the transistor Q. The base of the transistor Q is connected to the emitter of the infrared receiving transistor U1, and the emitter of the transistor Q is grounded.

[0011] As a further improvement to the above scheme, the infrared transmitting circuit includes a current-limiting resistor R4 and an infrared transmitting tube U2. One end of the current-limiting resistor R4 is connected to the drain of the PMOS transistor T2, and the other end of the current-limiting resistor R4 is connected to the positive terminal of the infrared transmitting tube U2. The negative terminal of the infrared transmitting tube U2 is grounded.

[0012] As a further improvement to the above solution, an indicator module is also included. The indicator module is electrically connected to the main control module. The main control module can send a status indicator signal to the indicator module according to the system status. The indicator module can receive the status indicator signal and respond to prompt the operator about the system status.

[0013] As a further improvement to the above solution, the main control module is an MCU.

[0014] As a further improvement to the above solution, the indicator module is at least one of an LCD display, a buzzer, and an indicator light.

[0015] As a further improvement to the above scheme, a decoupling capacitor C is also provided, one end of which is connected to the power supply module, and the other end of which is grounded.

[0016] This utility model provides a gas meter controller that has the aforementioned infrared communication system.

[0017] This utility model provides a gas meter having the aforementioned gas meter controller.

[0018] The beneficial effects of this utility model are:

[0019] Compared with existing technologies, this invention utilizes infrared communication technology in gas meters, achieving dual communication modes of local and remote operation. This not only improves the overall reliability of the system but also enhances its anti-interference capabilities, ensuring stable operation even in complex electromagnetic environments and meeting the real-time and reliability requirements of gas meters. Infrared communication technology can provide a physically isolated authentication mechanism for highly sensitive operations (such as key updates and rate adjustments), ensuring operational security and preventing remote attacks and data tampering. In NB-IoT-based smart gas meters, the infrared communication system is not only used for engineering debugging and parameter configuration but also serves as an emergency communication channel in case of NB-IoT network anomalies, ensuring the timely execution of critical operations.

[0020] In this invention, the infrared communication system can be used to support near-field operation of handheld terminals (such as PDAs or mobile phones). Technicians can complete parameter setting, data reading and other operations without carrying additional equipment, which simplifies the on-site debugging process and improves work efficiency.

[0021] This invention achieves dynamic switching of the infrared module through the control of a switching element, thereby turning off the infrared module in non-communication state, reducing standby power consumption. The circuit design is simple, uses few components, and has low hardware design cost. Its low power consumption characteristics can significantly reduce the overall power consumption of the system, making it very suitable for battery-powered smart gas meters, effectively extending the service life of the equipment and reducing maintenance costs. Attached Figure Description

[0022] Figure 1 This is a schematic diagram of the functional modules of this utility model;

[0023] Figure 2 This is a circuit diagram of the power interruption detection module of this utility model;

[0024] In the diagram: 1. Main control module; 2. Infrared receiving module; 3. Infrared transmitting module; 4. Button triggering module; 5. Indicator module. Detailed Implementation

[0025] To further illustrate the technical solution of this utility model, the following description is provided in conjunction with the accompanying drawings and embodiments.

[0026] This utility model discloses a low-power infrared communication system for a gas meter, which is applied to a gas meter. It includes a main control module 1, an infrared receiving module 2, an infrared transmitting module 3, a button triggering module 4, and a power supply module. The power supply module supplies power to each module. The button triggering module 4 is electrically connected to the main control module 1 to send an infrared start signal to the main control module 1. The main control module 1 is electrically connected to the infrared receiving module 2 and the infrared transmitting module 3. After receiving the button signal, the main control module 1 sends a control signal to either the infrared receiving module 2 or the infrared transmitting module 3. The infrared receiving module 2 includes an IRCTRL pin, an infrared receiving circuit, and an IRIN pin. The IRCTRL pin is connected to... A first control circuit is provided between the infrared receiving circuits to control the on / off state of the infrared receiving circuits. The infrared receiving module 2 receives control signals from the main control module 1 through the IRCTRL pin, interacts with the infrared handheld device through the infrared receiving circuit, and sends data received from the external device to the main control module 1 through the IRIN pin. The infrared transmitting module 3 includes an IROUT pin and an infrared transmitting circuit. A second control circuit is provided between the IROUT pin and the infrared transmitting circuit to control the on / off state of the infrared transmitting circuit. The infrared transmitting circuit interacts with the infrared handheld device. The infrared transmitting module 3 can receive control signals and data from the main control module 1 through the IROUT pin.

[0027] Specifically, the main control module 1 is an MCU, and the MCU model is FMLG048.

[0028] Specifically, the power supply module includes a battery and an LDO, wherein the LDO model is MD5333.

[0029] Furthermore, the first control circuit includes a current-limiting resistor R1 and a PMOS transistor T1. One end of the current-limiting resistor R1 is connected to the IRCTRL pin, and the other end of the current-limiting resistor R1 is connected to the gate (G) of the PMOS transistor T1. The source (S) of the PMOS transistor T1 is connected to the power supply module, and the drain (D) of the PMOS transistor T1 is connected to the infrared transmitting circuit. The second control circuit includes a current-limiting resistor R3 and a PMOS transistor T2. One end of the current-limiting resistor R3 is connected to the IROUT pin, and the other end of the current-limiting resistor R3 is connected to the gate (G) of the PMOS transistor T2. The source (S) of the PMOS transistor T2 is connected to the power supply module, and the drain (D) of the PMOS transistor T2 is connected to the infrared transmitting circuit.

[0030] Specifically, the current-limiting resistors R1 and R3 have a resistance of 1KΩ.

[0031] Furthermore, the infrared receiving circuit includes a pull-up resistor R2, an infrared receiving transistor U1, and a transistor Q. One end of the pull-up resistor R2 is connected to the drain of the PMOS transistor T1 and the collector of the infrared receiving transistor U1, respectively. The other end of the pull-up resistor R2 is connected to the collector of the transistor Q. The IRIN pin is located in the circuit between the pull-up resistor R2 and the transistor Q. The base of the transistor Q is connected to the emitter of the infrared receiving transistor U1, and the emitter of the transistor Q is grounded.

[0032] Specifically, the infrared receiver U1 is model PT204-6B.

[0033] Specifically, the transistor Q model is 8050 (J3Y).

[0034] Specifically, the pull-up resistor R2 is 10KΩ.

[0035] Furthermore, the infrared transmitting circuit includes a current-limiting resistor R4 and an infrared transmitting transistor U2. One end of the current-limiting resistor R4 is connected to the drain of the PMOS transistor T2, and the other end of the current-limiting resistor R4 is connected to the positive terminal of the infrared transmitting transistor U2. The negative terminal of the infrared transmitting transistor U2 is grounded.

[0036] Specifically, the infrared receiver U1 is model IR204C-AL.

[0037] Specifically, the resistance of the current-limiting resistor R4 is 330Ω.

[0038] In some embodiments, the system further includes an indicator module 5, which is electrically connected to the main control module 1. The main control module 1 can send a status indication signal to the indicator module 5 according to the system status. The indicator module 5 can receive the status indication signal and respond to prompt the operator about the system status.

[0039] Furthermore, the indicator module 5 is at least one of an LCD display, a buzzer, and an indicator light.

[0040] Furthermore, a decoupling capacitor C is also provided. One end of the decoupling capacitor C is connected to the power supply module, and the other end of the decoupling capacitor C is grounded. The decoupling capacitor C is used to improve power supply stability.

[0041] This utility model discloses a gas meter controller, which has the infrared communication system described above.

[0042] This utility model discloses a gas meter having a gas meter controller as described above.

[0043] In some embodiments, during use, pressing and holding the button in the trigger module 4 for 5 seconds activates the infrared receiving module 2 and the infrared transmitting module 3 via the MCU. When the indicator module 5 has an LCD display, the LCD screen displays a countdown of the infrared activation time. The infrared handheld device is then aligned with the infrared transceiver element for operation. When parameters to be sent or changed are input via the infrared handheld device, the MCU verifies the data and, if the reception is successful, controls the LCD screen to display "successful transmission" and simultaneously controls the buzzer to sound once. After the reception is complete, the MCU sends the terminal parameters to the infrared handheld device via the infrared transmitting module 3. The infrared handheld device verifies the data, and if it is correct, displays it on its screen.

[0044] Working principle of a low-power gas meter infrared communication system:

[0045] Infrared receiving mode:

[0046] The button controls the MCU to set the IRCTRL pin to low level (0V). The low level signal is connected to the P-channel silicon MOS field-effect transistor through the current limiting resistor R2. The PMOS transistor T1 is turned on, and the 3.3V voltage is supplied to the infrared receiver U1, the pull-up resistor R2 (10KΩ), and the transistor Q5 through T1 (S to D).

[0047] When an infrared signal (modulation signal) shines on the PT204-6B, the PT204-6B drives Q5 to conduct. After Q5 conducts, the IRIN pin output is pulled low, outputting a low-level pulse signal.

[0048] When there is no infrared signal, in PT204-6B, pull-up resistor R2 pulls the IRIN pin high, and Q5 is cut off.

[0049] When infrared transmission ends, the low-level signal is turned off, and PMOS transistor T1 is turned off, reducing system power consumption.

[0050] Infrared transmission mode:

[0051] When the MCU sets the IROUT pin to low level (0V), the gate voltage of the MOSFET becomes low level (0V), which is far below the threshold. PMOS transistor T2 is turned on, and the loop current flows through PMOS transistor T2, current limiting resistor R4, and infrared transmitter U2. Infrared transmitter U2 then emits an infrared signal.

[0052] When infrared transmission ends, the low-level signal is turned off, and PMOS transistor T2 is turned off, reducing system power consumption.

[0053] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. It will be apparent to those skilled in the art that this utility model is not limited to the details of the exemplary embodiments described above, and that it can be implemented in other specific forms without departing from the spirit or basic characteristics of this utility model. Therefore, the embodiments should be considered exemplary and non-limiting in all respects. The scope of this utility model is defined by the appended claims rather than the foregoing description, and thus all variations falling within the meaning and scope of equivalents of the claims are intended to be included within this utility model.

[0054] Furthermore, it should be understood that although this specification describes embodiments, not every embodiment contains only one independent technical solution. This narrative style is merely for clarity. Those skilled in the art should consider the specification as a whole, and the technical solutions in each embodiment can also be appropriately combined to form other embodiments that can be understood by those skilled in the art.

Claims

1. A low-power infrared communication system for a gas meter, applied in a gas meter, characterized in that: The system includes a main control module (1), an infrared receiving module (2), an infrared transmitting module (3), a button triggering module (4), and a power supply module. The power supply module supplies power to each module. The button triggering module (4) is electrically connected to the main control module (1) and sends an infrared start signal to the main control module (1). The main control module (1) is electrically connected to the infrared receiving module (2) and the infrared transmitting module (3). After receiving the button signal, the main control module (1) sends a control signal to the infrared receiving module (2) or the infrared transmitting module (3). The infrared receiving module (2) includes an IRCTRL pin, an infrared receiving circuit, and an IRIN pin. The IRCTRL pin is connected to the infrared receiving circuit... A first control circuit is provided between the infrared receiving module (2) and the infrared receiving module (3) to control the on / off state of the infrared receiving circuit. The infrared receiving module (2) receives control signals from the main control module (1) through the IRCTRL pin, interacts with the infrared handheld device through the infrared receiving circuit, and sends data received from the external device to the main control module (1) through the IRIN pin. The infrared transmitting module (3) includes an IROUT pin and an infrared transmitting circuit. A second control circuit is provided between the IROUT pin and the infrared transmitting circuit to control the on / off state of the infrared transmitting circuit. The infrared transmitting circuit interacts with the infrared handheld device. The infrared transmitting module (3) can receive control signals and data from the main control module (1) through the IROUT pin.

2. The low-power gas meter infrared communication system according to claim 1, characterized in that: The first control circuit includes a current-limiting resistor R1 and a PMOS transistor T1. One end of the current-limiting resistor R1 is connected to the IRCTRL pin, and the other end of the current-limiting resistor R1 is connected to the gate (G) of the PMOS transistor T1. The source (S) of the PMOS transistor T1 is connected to the power supply module, and the drain (D) of the PMOS transistor T1 is connected to the infrared transmitting circuit. The second control circuit includes a current-limiting resistor R3 and a PMOS transistor T2. One end of the current-limiting resistor R3 is connected to the IROUT pin, and the other end of the current-limiting resistor R3 is connected to the gate (G) of the PMOS transistor T2. The source (S) of the PMOS transistor T2 is connected to the power supply module, and the drain (D) of the PMOS transistor T2 is connected to the infrared transmitting circuit.

3. The low-power gas meter infrared communication system according to claim 2, characterized in that: The infrared receiving circuit includes a pull-up resistor R2, an infrared receiving transistor U1, and a transistor Q. One end of the pull-up resistor R2 is connected to the drain of the PMOS transistor T1 and the collector of the infrared receiving transistor U1, respectively. The other end of the pull-up resistor R2 is connected to the collector of the transistor Q. The IRIN pin is located in the circuit between the pull-up resistor R2 and the transistor Q. The base of the transistor Q is connected to the emitter of the infrared receiving transistor U1, and the emitter of the transistor Q is grounded.

4. The low-power gas meter infrared communication system according to claim 1, characterized in that: The infrared transmitting circuit includes a current-limiting resistor R4 and an infrared transmitting tube U2. One end of the current-limiting resistor R4 is connected to the drain of the PMOS transistor T2, and the other end of the current-limiting resistor R4 is connected to the positive terminal of the infrared transmitting tube U2. The negative terminal of the infrared transmitting tube U2 is grounded.

5. The low-power gas meter infrared communication system according to claim 1, characterized in that: It also includes an indicator module (5), which is electrically connected to the main control module (1). The main control module (1) can send a status indicator signal to the indicator module (5) according to the system status. The indicator module (5) can receive the status indicator signal and respond to prompt the operator about the system status.

6. The low-power gas meter infrared communication system according to claim 1, characterized in that: The main control module (1) is an MCU.

7. The low-power gas meter infrared communication system according to claim 5, characterized in that: The indicator module (5) is at least one of an LCD display, a buzzer, and an indicator light.

8. A low-power gas meter infrared communication system according to claim 2, characterized in that: A decoupling capacitor C is also provided, with one end of the decoupling capacitor C connected to the power supply module and the other end of the decoupling capacitor C grounded.

9. A gas meter controller, characterized in that: An infrared communication system having any one of claims 1 to 8.

10. A gas meter, characterized in that: It has a gas meter controller as described in claim 9.

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