Wireless communication module and equipment with circuit for distinguishing power failure and plugging power failure

By designing a fast power-down detection circuit and module confirmation access circuit in the wireless communication module, using specific components and circuit structures, distinguishing the true and false power-down situation of the wireless communication module, solving the error of the module when artificial unplugging and real power outage is achieved. The problem is determined and accurate power termination detection is achieved.

CN222441811UActive Publication Date: 2025-02-07QINGDAO ITECHENE TECH CO LTD
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Patent Information

Application Number
CN202323516091.8
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2023-12-22
Publication Date
2025-02-07
Estimated Expiration
2033-12-22

AI Technical Summary

Technical Problem

When a wireless communication module is unplugged or a real power outage, it cannot distinguish between two power supply termination situations, resulting in misjudgment and false reporting of power outage events.

Method used

A wireless communication module circuit including a fast power-down detection circuit and a module confirmation access circuit was designed. By detecting voltage changes and optocoupler isolation scheme, it distinguishes human unplugging by using transistors, voltage stabilizing diodes, voltage divider resistors and optocoupler isolation schemes. and real power outages.

Benefits of technology

It realizes an accurate distinction between true and false power failure of wireless communication modules, avoids misjudgment and false reporting, is sensitive and fast detection, has strong adaptability and is low-cost.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model relates to a wireless communication module and equipment with a distinguishing circuit for identifying power failure and plugging power failure. The wireless communication module comprises a module main chip MCU (Microprogrammed Control Unit); the communication chip is electrically connected with a rapid power failure detection circuit and a module confirmation access circuit; the quick power failure detection circuit comprises triodes Q1 and Q2, a voltage stabilizing diode DQ1 and divider resistors R2 and R3, the module confirmation access circuit comprises an optocoupler U1, a divider resistor R1, resistors RG1 and RG3, capacitors C1 and C2, and diodes DG1-DG3; the device is reasonable in design, compact in structure and convenient to use.
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Description

Technical Field

[0001] The utility model relates to a wireless communication module and equipment with a circuit for distinguishing power failure and plug-in power failure. Background Art

[0002] When the submodule is installed on equipment such as electric energy meters, it may be manually unplugged. For wired modules, the last information interaction before the power outage can be performed to verify whether the module has been unplugged. However, for wireless communication modules with backup power, the module will lose power when it is manually unplugged, but it will also lose power when there is a real power outage. Both situations mean that the module is powered off and there is no way to distinguish them. Therefore, the power outage event will be reported through the wireless mode, resulting in misjudgment.

[0003] The circuit is mainly composed of two parts, including a fast power-off detection circuit and a module confirmation access circuit. The fast power detection circuit is mainly composed of two triodes, a voltage regulator and two voltage-dividing resistors; the module access detection circuit is mainly composed of three resistors, two diodes, two capacitors and an optical coupler isolation. The utility model provides a method for quickly identifying power failure and plug-in power failure of wireless modules, and provides a new method for preventing false reporting of information. Utility Model Content

[0004] The technical problem to be solved by the utility model is generally to provide a wireless communication module and equipment with a circuit for distinguishing between power failure and plug-in power failure.

[0005] In order to solve the above problems, the technical solution adopted by the utility model is:

[0006] A wireless communication module with a circuit for distinguishing power failure and plug-in power failure, comprising a module main chip MCU;

[0007] The communication chip is electrically connected to a fast power-off detection circuit and a module confirmation access circuit;

[0008] A fast power-off detection circuit includes transistors Q1, Q2, a voltage-stabilizing diode DQ1 and voltage-dividing resistors R2, R3;

[0009] The module confirms that the access circuit includes optocoupler U1, voltage divider resistor R1, resistors RG1 and RG3, capacitors C1 and C2, and diodes DG1-DG3;

[0010] In the optocoupler U1, pin 4 is connected to the module main chip MCU through channel YX1; pin 3 is grounded, pin 4 is grounded through diode C1, and pin 4 is connected to 3.3V through voltage divider resistor R1; diode DG1 and resistor RG1 are connected in parallel between pin 2 and pin 1; after pin 4 passes through diode DG2, it is connected to the GND of the plug-in device through resistor RG3 and grounded through capacitor C2. The output end of resistor RG3 is grounded through diode DG3.

[0011] As a further improvement of the above technical solution:

[0012] The base of transistor Q1 is grounded through the reverse-connected Zener diode DQ1; the emitter of transistor Q1 is connected to the power supply +12V and the collector is connected to the base of transistor Q2; the emitter of transistor Q2 is grounded and the collector is connected to the module main chip MCU through the POW check channel, and the collector of transistor Q2 is connected to +12V and ground respectively through the voltage-dividing resistors R2 and R3.

[0013] The module's main chip MCU model is WS7300-P915.

[0014] A device comprises a mainboard, on which a power supply and the above-mentioned wireless communication module electrically connected to the power supply are mounted.

[0015] The utility model provides a simple method circuit for distinguishing true and false power failure of a wireless communication module with backup power. When the module is manually unplugged, the module will lose power, but when there is a real power failure, the module will also lose power. Both situations are power supply termination for the module, and there is no way to distinguish them. The power failure event will be reported through the wireless mode, resulting in misjudgment. This circuit detects power failure sensitively and quickly, has strong adaptability, and can be applied to all wireless communication modules with backup points. It is low-cost and can meet functional requirements.

[0016] The utility model has the advantages of reasonable design, low cost, firmness and durability, safety and reliability, simple operation, time-saving, labor-saving, money-saving, compact structure and convenient use. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of a detection circuit of the utility model.

[0018] Figure 2 It is a schematic diagram of the process of the utility model.

[0019] Figure 3 It is a circuit diagram of a wireless communication module of the utility model. DETAILED DESCRIPTION

[0020] like Figure 1-3As shown, the wireless communication module and device with a circuit for distinguishing power failure and plug-in power failure of this embodiment include a module main chip MCU;

[0021] The communication chip is electrically connected to a fast power-off detection circuit and a module confirmation access circuit;

[0022] A fast power-off detection circuit includes transistors Q1, Q2, a voltage-stabilizing diode DQ1 and voltage-dividing resistors R2, R3;

[0023] The base of transistor Q1 is connected to ground through the reverse-connected voltage-stabilizing diode DQ1; the emitter of transistor Q1 is connected to the power supply +12V and the collector is connected to the base of transistor Q2; the emitter of transistor Q2 is connected to ground and the collector is connected to the module main chip MCU through the POW check channel, and the collector of transistor Q2 is connected to +12V and ground respectively through the voltage-dividing resistors R2 and R3;

[0024] This circuit uses the DQ1 voltage stabilizing diode DQ1 to stabilize the base voltage of transistor Q1 at 9V. When 12V is normally used to power the module (12V is provided by the module device), transistor Q1 is turned on. At this time, the base voltage of transistor Q2 is greater than the emitter voltage, and Q2 is turned on. Using the principle of resistor voltage division, R2 and R3 divide the POW Check voltage to 3.3V, but at this time, Q2 is turned on to pull POW Check down to 0V and transmit it to the module main chip MCU. At this time, the chip recognizes it as 0, which is normal power supply; when the module power supply voltage 12V starts to lose power, since the power loss is not rapid, when the voltage drops below 9.7V, transistor Q1 is not turned on. At this time, the base voltage of Q2 is not greater than the emitter voltage, and Q2 is not turned on. Using the principle of resistor voltage division, R2 and R3 divide the POW Check voltage to 3.3V. Using the principle of resistor voltage division, R2 and R3 divide the POW Check voltage to 0V. The Check voltage is controlled at 3.3V and transmitted to the module main chip. At this time, the chip recognizes it as 1, indicating that the power supply is about to be cut off, and it is recognized in advance.

[0025] The module confirms that the access circuit includes optocoupler U1, voltage divider resistor R1, resistors RG1 and RG3, capacitors C1 and C2, and diodes DG1-DG3;

[0026] In the optocoupler U1, pin 4 is connected to the module main chip MCU through channel YX1; pin 3 is grounded, pin 4 is grounded through diode C1, and pin 4 is connected to 3.3V through voltage divider resistor R1; diode DG1 and resistor RG1 are connected in parallel between pin 2 and pin 1; after pin 4 passes through diode DG2, it is connected to the GND of the plug-in device through resistor RG3 and grounded through capacitor C2. The output end of resistor RG3 is grounded through diode DG3;

[0027] This circuit adopts the optocoupler isolation solution. YX1 is connected to the module chip to receive signals, and the other end YA0X0 is connected to GND on the device where the module is plugged in. That is to say, when the module is unplugged maliciously, the YA0X0 end cannot form a loop, the optocoupler U1 cannot be turned on, and YX1 is pulled high. If the module is plugged into the device, YA0X0 is short-circuited with GND, and the 5V power supply forms a loop, the optocoupler U1 is turned on, and YX1 is pulled low. That is, when YX1 is recognized as 0, the module is normal, and when it is recognized as 1, the module is unplugged.

[0028] The present invention is fully described for a clearer disclosure, and the prior art will not be listed one by one.

[0029] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit it; although the utility model is described in detail with reference to the above embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the above embodiments, or replace some of the technical features therein with equivalents; it is obvious for those skilled in the art to combine multiple technical solutions of the utility model. However, these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims

1. A wireless communication module with a circuit for distinguishing power outages and plug-in power failures, characterized in that: Including module main chip MCU; The communication chip is electrically connected to a fast power-off detection circuit and a module confirmation access circuit; A fast power-off detection circuit includes transistors Q1, Q2, a voltage-stabilizing diode DQ1 and voltage-dividing resistors R2, R3; The base of transistor Q1 is connected to ground through the reverse-connected voltage-stabilizing diode DQ1; the emitter of transistor Q1 is connected to the power supply +12V and the collector is connected to the base of transistor Q2; the emitter of transistor Q2 is connected to ground and the collector is connected to the module main chip MCU through the POW check channel, and the collector of transistor Q2 is connected to +12V and ground respectively through the voltage-dividing resistors R2 and R3; The module confirms that the access circuit includes optocoupler U1, voltage divider resistor R1, resistors RG1 and RG3, capacitors C1 and C2, and diodes DG1-DG3; In the optocoupler U1, pin 4 is connected to the module main chip MCU through channel YX1; pin 3 is grounded, pin 4 is grounded through diode C1, and pin 4 is connected to 3.3V through voltage divider resistor R1; A diode DG1 and a resistor RG1 are connected in parallel between pin 2 and pin 1; after pin 4 passes through diode DG2, it is connected to the GND of the plug-in device through resistor RG3 and grounded through capacitor C2. The output end of resistor RG3 is grounded through diode DG3.

2. The wireless communication module with a circuit for distinguishing power failure and plug-in power failure according to claim 1, characterized in that: The module's main chip MCU model is WS7300-P915.

3. A device, characterized in that: The invention comprises a main board on which a power supply and a wireless communication module as claimed in any one of claims 1 or 2 electrically connected to the power supply are mounted.