A sensitivity-adapting circuit breaker finder circuit

Abstract

The application relates to a sensitivity-adaptive circuit for a circuit breaker finder, which comprises a transmitter rectifier voltage stabilizing circuit, a transmitter sampling circuit, a transmitter signal transmitting circuit, a transmitter single-chip microcomputer U1, a receiver power supply circuit, a receiver signal induction amplification circuit, a receiver sound-light alarm circuit and a receiver single-chip microcomputer U3; the transmitter rectifier voltage stabilizing circuit is used for supplying power to the transmitter single-chip microcomputer U1; the transmitter sampling circuit divides the voltage generated by the transmitter rectifier voltage stabilizing circuit to generate several small signal inputs to the transmitter single-chip microcomputer U1; the transmitter signal transmitting circuit is used for generating a pulse signal; the transmitter single-chip microcomputer U1 is used for analyzing the small signal and acquiring zero-crossing point information; the receiver power supply circuit is used for supplying power to the receiver single-chip microcomputer U3; and the receiver signal induction amplification circuit is used for amplifying an induction signal and inputting the induction signal into the receiver single-chip microcomputer U3.

Description

Technical Field

[0001] This invention relates to the field of circuit detection technology, specifically to a sensitivity-adaptive circuit breaker finder circuit. Background Technology

[0002] In some residential communities or factories, when planning to repair a specific circuit without affecting the normal power supply to other circuits, it is necessary to locate the corresponding circuit breaker in the distribution box and disconnect it. Improper maintenance of the distribution box will prevent quick location of the target circuit breaker and may result in the incorrect circuit breaker being disconnected, affecting other circuits.

[0003] This invention solves the problem of being unable to quickly and accurately locate the circuit breaker position corresponding to a specific circuit. Simply connect the transmitter of this invention to the target circuit, and then use the receiver of this invention to scan the circuit breaker location in the distribution box to find the circuit breaker corresponding to the target circuit. Summary of the Invention

[0004] To address the problems existing in the prior art, this invention proposes a sensitivity-adaptive circuit breaker finder circuit.

[0005] The technical solution of the present invention is as follows:

[0006] On one hand, this invention proposes a sensitivity-adaptive circuit breaker finder circuit, including a transmitter rectifier and voltage regulator circuit, a transmitter sampling circuit, a transmitter signal transmission circuit, a transmitter microcontroller U1, a receiver power supply circuit, a receiver signal sensing and amplification circuit, a receiver audible and visual alarm circuit, and a receiver microcontroller U3. The transmitter rectifier and voltage regulator circuit supplies power to the transmitter microcontroller U1. The transmitter sampling circuit divides the voltage generated by the transmitter rectifier and voltage regulator circuit to generate several small signals that are input to the transmitter microcontroller U1. The transmitter signal transmission circuit generates pulse signals. The transmitter microcontroller U1 analyzes the small signals and obtains zero-crossing information. The receiver power supply circuit supplies power to the receiver microcontroller U3. The receiver signal sensing and amplification circuit amplifies the sensed signal and inputs it into the receiver microcontroller U3. The receiver microcontroller U3 analyzes the sensed signal and adaptively adjusts the reference value of the signal strength. The receiver audible and visual alarm circuit indicates the signal strength of the circuit breaker to be detected.

[0007] In a preferred embodiment, the transmitter rectification and voltage regulation circuit includes a rectifier bridge D1, a current-limiting resistor R1, a current-limiting resistor R4, a Zener diode D2, and a capacitor C1; one end of the rectifier bridge D1 is connected to the power supply, and the other end is connected to one end of the current-limiting resistor R1; the other end of the current-limiting resistor R1 is connected to one end of the current-limiting resistor R4, and the other end of the current-limiting resistor R4 is connected to one end of the Zener diode D2 and one end of the capacitor C1; the other ends of the Zener diode D2 and the capacitor C1 are both grounded.

[0008] In a preferred embodiment, the transmitter sampling circuit includes resistors R2 and R3; one end of resistor R2 is connected to the connection line of current-limiting resistors R1 and R4, and the other end is connected to the PA1 port of the transmitter microcontroller U1 and one end of resistor R3 respectively; the other end of resistor R3 is grounded.

[0009] In a preferred embodiment, the transmitter signal transmission circuit is composed of a field-effect transistor Q1. The gate of the field-effect transistor Q1 is connected to the PA3 port of the transmitter microcontroller U1, the drain of the field-effect transistor Q1 is connected to the rectifier bridge D1, and the source of the field-effect transistor Q1 is grounded.

[0010] In a preferred embodiment, the receiver power supply circuit includes a battery BAT, a Zener diode U2, and a capacitor C2; the positive terminal of the battery BAT is connected to the input terminal of the Zener diode U2, and the negative terminal of the battery BAT is grounded; the output terminal of the Zener diode U2 is connected to one end of the capacitor C2, and the other end of the capacitor C2 is grounded.

[0011] In a preferred embodiment, the receiver signal sensing and amplification circuit includes an inductor L1, resistors R5, R6, R7, R8, a capacitor C3, and a field-effect transistor Q2. One end of the inductor L1 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to the gate of the field-effect transistor Q2. The drain of the field-effect transistor Q2 is connected to a power supply via resistor R5. The source of the field-effect transistor Q2 is connected to one end of both resistor R6 and capacitor C3. The other end of resistor R6 is grounded, and the other end of capacitor C3 is connected to both resistor R7 and the PA0 port of the receiver microcontroller U3.

[0012] In a preferred embodiment, the receiver's audible and visual alarm circuit includes a light-emitting diode (LED1) and a buzzer (BZ1); one end of the LED1 is connected to the PA3 port of the receiver's microcontroller U3, and the other end is grounded; one end of the buzzer (BZ1) is connected to the PA1 port of the receiver's microcontroller U3, and the other end is grounded.

[0013] On the other hand, this invention proposes a control method for a sensitivity-adaptive circuit breaker finder circuit, the specific steps of which include:

[0014] The transmitter's microcontroller U1 controls the field-effect transistor Q1 to conduct, transmitting a pulse signal into the power grid under test;

[0015] When the receiver is powered on, the receiver automatically obtains the reference signal strength through the receiver microcontroller and controls the receiver to scan each circuit breaker in the distribution box in sequence.

[0016] The baseline signal strength is updated based on the signal with the highest signal strength among all circuit breakers obtained from the scan results.

[0017] Scan each circuit breaker in the distribution box again in sequence, and determine the specific circuit and its corresponding circuit breaker based on the status of the LEDs and buzzers.

[0018] On the other hand, the present invention proposes an electronic device, including a memory, a processor, and a computer program stored in the memory and executable on the processor, wherein the processor executes the program to implement a control method for a sensitivity-adaptive circuit breaker finder circuit as described in any embodiment of the present invention.

[0019] On the other hand, the present invention proposes a computer-readable storage medium having a computer program stored thereon, which, when executed by a processor, implements a control method for a sensitivity-adaptive circuit breaker finder circuit as described in any embodiment of the present invention.

[0020] The present invention has the following beneficial effects:

[0021] 1. This invention transmits a stable pulse signal to a specific circuit through a transmitter rectifier and voltage regulator circuit, a transmitter sampling circuit, a transmitter signal transmission circuit, and a transmitter microcontroller U1, which facilitates detection.

[0022] 2. This invention obtains the sensed signal stably through each circuit in the receiver, and analyzes the sensed signal to discover specific circuits.

[0023] 3. This invention uses the receiver microcontroller to calculate and analyze the induced signal, which can automatically adjust the sensitivity, making the entire short circuit locator circuit suitable for various voltage environments. Attached Figure Description

[0024] Figure 1 This is a schematic diagram of the circuit structure of the present invention;

[0025] Figure 2 This is a transmitter circuit diagram according to an embodiment of the present invention;

[0026] Figure 3 This is a power supply circuit diagram of the receiver according to an embodiment of the present invention;

[0027] Figure 4 This is a receiver circuit diagram according to an embodiment of the present invention. Detailed Implementation

[0028] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0029] It should be understood that the step numbers used in the text are for ease of description only and are not intended to limit the order in which the steps are performed.

[0030] It should be understood that the terminology used in this specification is for the purpose of describing particular embodiments only and is not intended to limit the invention. As used in this specification and the appended claims, the singular forms “a,” “an,” and “the” are intended to include the plural forms unless the context clearly indicates otherwise.

[0031] The terms “comprising” and “including” indicate the presence of the described feature, whole, step, operation, element and / or component, but do not exclude the presence or addition of one or more other features, wholes, steps, operations, elements, components and / or collections thereof.

[0032] The term “and / or” refers to any combination of one or more of the associated listed items, as well as all possible combinations, and includes these combinations.

[0033] Example 1:

[0034] See Figure 1 A sensitivity-adaptive circuit breaker finder circuit includes a transmitter rectifier and voltage regulator circuit, a transmitter sampling circuit, a transmitter signal transmission circuit, a transmitter microcontroller U1, a receiver power supply circuit, a receiver signal sensing and amplification circuit, a receiver audible and visual alarm circuit, and a receiver microcontroller U3. The transmitter rectifier and voltage regulator circuit powers the transmitter microcontroller U1. The transmitter sampling circuit divides the voltage generated by the transmitter rectifier and voltage regulator circuit to generate several small signals that are input to the transmitter microcontroller U1. The transmitter signal transmission circuit generates pulse signals. The transmitter microcontroller U1 analyzes the small signals and obtains zero-crossing information. The receiver power supply circuit powers the receiver microcontroller U3. The receiver signal sensing and amplification circuit amplifies the sensed signal and inputs it into the receiver microcontroller U3. The receiver microcontroller U3 analyzes the sensed signal and adaptively adjusts the reference value of the signal strength. The receiver audible and visual alarm circuit indicates the signal strength of the circuit breaker to be detected.

[0035] In a preferred embodiment of this invention, the transmitter rectification and voltage regulation circuit includes a rectifier bridge D1, a current-limiting resistor R1, a current-limiting resistor R4, a Zener diode D2, and a capacitor C1. One end of the rectifier bridge D1 is connected to a power supply, and the other end is connected to one end of the current-limiting resistor R1. The other end of the current-limiting resistor R1 is connected to one end of the current-limiting resistor R4, and the other end of the current-limiting resistor R4 is connected to one end of the Zener diode D2 and one end of the capacitor C1, respectively. The other ends of the Zener diode D2 and the capacitor C1 are both grounded.

[0036] In this embodiment, as Figure 2 As shown, after the AC current passes through the rectifier bridge D1 and the current-limiting resistor R1, it flows through the sampling resistors R2 and R3. The small signal after voltage division enters the transmitter microcontroller U1 from the PA1 port.

[0037] In a preferred embodiment of this invention, the transmitter sampling circuit includes resistors R2 and R3; one end of resistor R2 is connected to the connection line of current-limiting resistors R1 and R4, and the other end is connected to the PA1 port of the transmitter microcontroller U1 and one end of resistor R3 respectively; the other end of resistor R3 is grounded.

[0038] In this embodiment, as Figure 2 As shown, resistors R2 and R3 act as a voltage divider, and two small signals can be obtained after the voltage is divided.

[0039] In a preferred embodiment of this invention, the transmitter signal transmission circuit is composed of a field-effect transistor Q1. The gate of the field-effect transistor Q1 is connected to the PA3 port of the transmitter microcontroller U1, the drain of the field-effect transistor Q1 is connected to the rectifier bridge D1, and the source of the field-effect transistor Q1 is grounded.

[0040] In this embodiment, the transmitter's microcontroller U1 analyzes the signal in real time to obtain the zero-crossing information of the full-wave AC rectification. Whenever the AC current crosses zero, the transmitter's microcontroller U1 controls the field-effect transistor Q1 to conduct for a duration of 10µs. When Q1 is turned on, the rectified AC live and neutral wires are momentarily short-circuited, generating a pulse signal on the AC circuit where the transmitter is located. This pulse propagates along the conductors through the power grid and reaches the circuit breaker in the substation. Because the conduction time of Q1 is extremely short, it does not have any other adverse effects on the power grid.

[0041] In a preferred embodiment of this invention, the receiver power supply circuit includes a battery BAT, a Zener diode U2, and a capacitor C2; the positive terminal of the battery BAT is connected to the input terminal of the Zener diode U2, and the negative terminal of the battery BAT is grounded; the output terminal of the Zener diode U2 is connected to one end of the capacitor C2, and the other end of the capacitor C2 is grounded.

[0042] In this embodiment, as Figure 3 As shown, the receiver is powered by battery BAT.

[0043] In a preferred embodiment of this invention, the receiver signal sensing and amplification circuit includes an inductor L1, resistors R5, R6, R7, R8, a capacitor C3, and a field-effect transistor Q2. One end of the inductor L1 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to the gate of the field-effect transistor Q2. The drain of the field-effect transistor Q2 is connected to a power supply via resistor R5. The source of the field-effect transistor Q2 is connected to one end of resistor R6 and one end of capacitor C3, respectively. The other end of resistor R6 is grounded, and the other end of capacitor C3 is connected to resistor R7 and the PA0 port of the receiver microcontroller U3, respectively.

[0044] In this embodiment, as Figure 4 As shown, the signal induced by inductor L1 is amplified by field-effect transistor Q2 and sent to the receiver microcontroller through port PA0 for signal analysis. Invalid signals are eliminated, valid signals sent by the transmitter are found, and the signals are converted into signal strength information.

[0045] In a preferred embodiment of this invention, the receiver audible and visual alarm circuit includes a light-emitting diode (LED1) and a buzzer (BZ1); one end of the LED1 is connected to the PA3 port of the receiver microcontroller U3, and the other end is grounded; one end of the buzzer (BZ1) is connected to the PA1 port of the receiver microcontroller U3, and the other end is grounded.

[0046] In this embodiment, both the light-emitting diode LED1 and the buzzer BZ1 react by comparing the intensity of the sensed signal with the reference signal of the receiver. When the sensed signal is greater than the reference signal, the light-emitting diode LED1 lights up and the buzzer BZ1 starts to sound.

[0047] Example 2:

[0048] A control method for a sensitivity-adaptive circuit breaker finder circuit as described in any one of claims 1-7, comprising the following steps:

[0049] The transmitter's microcontroller U1 controls the field-effect transistor Q1 to conduct, transmitting a pulse signal into the power grid under test;

[0050] When the receiver is powered on, the receiver automatically obtains the reference signal strength through the receiver microcontroller and controls the receiver to scan each circuit breaker in the distribution box in sequence.

[0051] The baseline signal strength is updated based on the signal with the highest signal strength among all circuit breakers obtained from the scan results.

[0052] Scan each circuit breaker in the distribution box again in sequence, and determine the specific circuit and its corresponding circuit breaker based on the status of the LEDs and buzzers.

[0053] In this embodiment, the receiver is powered on away from the transformer box and AC power. At this time, the receiver microcontroller will automatically calibrate and store the currently measured signal strength as the reference value Uref.

[0054] Place the receiver close to the distribution box where the target circuit breaker is located, and scan each circuit breaker in turn to perform the first scan.

[0055] As the receiver moves, the receiver microcontroller obtains a changing signal strength Ui.

[0056] The receiver microcontroller compares the obtained signal strength with the reference value. If the obtained signal strength is greater than the reference value, i.e., Ui>Uref, the obtained signal strength is set as the new reference value, i.e., Uref=Ui.

[0057] Set a small tolerance range Ua in advance.

[0058] When the signal strength is greater than or equal to Uref-Ua, the receiver microcontroller lights up the LED and makes the buzzer sound, but this does not represent the test result.

[0059] When the signal strength is less than Uref-Ua, the receiver microcontroller turns off the LED and the buzzer.

[0060] After scanning all circuit breakers, the reference value Uref stored in the receiver microcontroller will be the maximum value obtained in the first scan. The maximum value will only be generated on the target circuit breaker.

[0061] Use the receiver to scan the distribution box where the target circuit breaker is located, and scan each circuit breaker in turn to perform a second scan.

[0062] Based on a two-scan operation, this invention achieves adaptive sensitivity, making it applicable to various voltage environments, such as 110V, 220V, and 380V. It also ensures accuracy and ease of operation, eliminating the need for manual sensitivity adjustment by the user.

[0063] Since the receiver's microcontroller has already stored the maximum signal strength Uref near the target circuit breaker, the receiver will only light up the LED above the target circuit breaker and sound the buzzer. This is used to locate the target circuit breaker.

[0064] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent structural or procedural transformations made based on the content of the present invention's specification and drawings, or direct or indirect applications in other related technical fields, are similarly included within the patent protection scope of the present invention.

Claims

1. A control method for a sensitivity-adaptive circuit breaker finder circuit, characterized in that, The specific steps include: The sensitivity-adaptive circuit breaker finder circuit includes a transmitter rectifier and voltage regulator circuit, a transmitter sampling circuit, a transmitter signal transmission circuit, a transmitter microcontroller U1, a receiver power supply circuit, a receiver signal sensing and amplification circuit, a receiver audible and visual alarm circuit, and a receiver microcontroller U3. The transmitter rectifier and voltage regulator circuit powers the transmitter microcontroller U1. The transmitter sampling circuit divides the voltage generated by the transmitter rectifier and voltage regulator circuit to generate several small signals, which are then input to the transmitter microcontroller U1. The transmitter signal transmission circuit generates pulse signals. The transmitter microcontroller U1 analyzes these small signals to obtain zero-crossing information. The receiver power supply circuit powers the receiver microcontroller U3. The receiver signal sensing and amplification circuit amplifies the sensed signals and inputs them into the receiver microcontroller U3. The receiver audible and visual alarm circuit indicates the signal strength of the circuit breaker under test. The receiver microcontroller U3 obtains a reference signal value through automatic calibration and sequentially scans the circuit breakers under test, updating the reference signal value according to the signal strength. The transmitter's microcontroller U1 controls the field-effect transistor Q1 to conduct, transmitting a pulse signal into the power grid under test; When the receiver is powered on, the receiver automatically obtains the reference signal strength through the receiver microcontroller and controls the receiver to scan each circuit breaker in the distribution box in sequence. The baseline signal strength is updated based on the signal with the highest signal strength among all circuit breakers obtained from the scan results. Scan each circuit breaker in the distribution box again in sequence, and determine the specific circuit and its corresponding circuit breaker based on the status of the LEDs and buzzers. The transmitter rectification and voltage regulation circuit includes a rectifier bridge D1, a current-limiting resistor R1, a current-limiting resistor R4, a Zener diode D2, and a capacitor C1. One end of the rectifier bridge D1 is connected to the power supply, and the other end is connected to one end of the current-limiting resistor R1. The other end of the current-limiting resistor R1 is connected to one end of the current-limiting resistor R4, and the other end of the current-limiting resistor R4 is connected to one end of the Zener diode D2 and one end of the capacitor C1. The other ends of the Zener diode D2 and the capacitor C1 are both grounded. The transmitter sampling circuit includes resistors R2 and R3; one end of resistor R2 is connected to the connection line of current-limiting resistors R1 and R4, and the other end is connected to the PA1 port of the transmitter microcontroller U1 and one end of resistor R3 respectively; the other end of resistor R3 is grounded. The transmitter signal transmission circuit is composed of a field-effect transistor Q1. The gate of the field-effect transistor Q1 is connected to the PA3 port of the transmitter microcontroller U1, the drain of the field-effect transistor Q1 is connected to the rectifier bridge D1, and the source of the field-effect transistor Q1 is grounded. The receiver power supply circuit includes a battery BAT, a Zener diode U2, and a capacitor C2; the positive terminal of the battery BAT is connected to the input terminal of the Zener diode U2, and the negative terminal of the battery BAT is grounded; the output terminal of the Zener diode U2 is connected to one end of the capacitor C2, and the other end of the capacitor C2 is grounded. The receiver signal sensing and amplification circuit includes an inductor L1, resistors R5, R6, R7, R8, a capacitor C3, and a field-effect transistor Q2. One end of the inductor L1 is connected to one end of the resistor R8, and the other end of the resistor R8 is connected to the gate of the field-effect transistor Q2. The drain of the field-effect transistor Q2 is connected to the power supply via resistor R5. The source of the field-effect transistor Q2 is connected to one end of both resistor R6 and capacitor C3. The other end of resistor R6 is grounded, and the other end of capacitor C3 is connected to both resistor R7 and the PA0 port of the receiver microcontroller U3.

2. The control method for a sensitivity-adaptive circuit breaker finder circuit according to claim 1, characterized in that, The receiver's audible and visual alarm circuit includes a light-emitting diode (LED1) and a buzzer (BZ1); one end of the LED1 is connected to the PA3 port of the receiver's microcontroller U3, and the other end is grounded; one end of the buzzer (BZ1) is connected to the PA1 port of the receiver's microcontroller U3, and the other end is grounded.

3. An electronic device, comprising a memory, a processor, and a computer program stored in the memory and executable on the processor, characterized in that, When the processor executes the program, it implements a control method for a sensitivity-adaptive circuit breaker finder circuit as described in claims 1-2.

4. A computer-readable storage medium having a computer program stored thereon, characterized in that, When executed by the processor, the program implements a control method for a sensitivity-adaptive circuit breaker finder circuit as described in claims 1-2.

Images