电能表蓝牙故障自检测电路、电能表
By adding a startup circuit between the MCU and Bluetooth module of the energy meter, and utilizing a heartbeat response mechanism and timed reset control, the accuracy problem of Bluetooth fault detection in smart energy meters is solved, achieving efficient Bluetooth module fault detection and improving the accuracy and reliability of meter reading.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- GALAXY ELECTRIC POWER GROUP CO LTD JIANGXI BRANCH
- Filing Date
- 2025-06-30
- Publication Date
- 2026-07-17
AI Technical Summary
Most existing smart meters lack Bluetooth fault detection capabilities, making it impossible to detect Bluetooth communication failures in a timely manner, resulting in inaccurate meter readings.
A startup circuit, including resistors, capacitors, transistors, and MOSFETs, is added between the MCU and Bluetooth module of the energy meter. The heartbeat response mechanism is used to initially detect whether the Bluetooth module is faulty, and combined with timed reset control, multiple in-depth detections are achieved in a time-division manner.
It improves the accuracy of Bluetooth module fault detection, avoids misjudgments caused by signal interference, and ensures the accuracy and reliability of meter reading.
Smart Images
Figure CN224518954U_ABST
Abstract
Claims
1. A Bluetooth fault self-detection circuit for an electricity meter, characterized in that, include: The energy meter's MCU and Bluetooth module, as well as the startup circuit; the startup circuit includes a resistor R3, a capacitor C1, a transistor Q1, and a MOSFET Q2; The RX and TX pins of the MCU are connected to the TX and RX pins of the Bluetooth module, respectively. The CTL control pin of the MCU is connected to the VCC pin of the MCU and one end of the resistor R3 via the transistor Q1. The other end of the resistor R3 is split into two paths: one path is connected to the gate of the MOSFET Q2, and the other path is connected to the VCC pin of the MCU via the capacitor C1. The source of the MOSFET Q2 is connected to the VCC pin of the MCU, and its drain is connected to the VCC_BLT pin of the Bluetooth module.
2. The electric energy meter Bluetooth fault self-detecting circuit of claim 1, wherein, The startup circuit also includes resistors R1 and R4; the CTL control pin of the MCU is divided into two paths, one of which is grounded through resistor R4, and the other is connected to the base of transistor Q1 through resistor R1; the emitter of transistor Q1 is grounded, and its collector is connected to the VCC pin of the MCU and one end of resistor R3 respectively.
3. The electric energy meter Bluetooth fault self-detecting circuit of claim 2, wherein, The startup circuit also includes a resistor R2; the collector of the transistor Q1 is connected to the VCC pin of the MCU via the resistor R2.
4. The electric energy meter Bluetooth fault self-detecting circuit of claim 1, wherein, It also includes a clock circuit for the electricity meter; the clock circuit is connected to the MCU.
5. The electric energy meter Bluetooth fault self-detection circuit of claim 1, wherein, The source and drain of the MOS transistor Q2 are connected to an integrated diode.
6. The electric energy meter Bluetooth fault self-detection circuit of claim 1, wherein, The MCU's input VCC pin is connected to a 5V voltage input.
7. The electric energy meter Bluetooth fault self-detection circuit of claim 1, wherein, The capacitance value of capacitor C1 ranges from 100nF to 10μF.
8. The electric energy meter Bluetooth fault self-detection circuit of claim 1, wherein, The resistance value of the resistor R3 ranges from 10KΩ to 470KΩ.
9. An electric energy meter, characterized by The electricity meter includes the Bluetooth fault self-detection circuit for electricity meters as described in any one of claims 1 to 8.
10. The electric energy meter of claim 9, wherein, The electricity meter is a smart electricity meter.