CN114646903A - Air switch hunting instrument with socket line sequence detection function and detection method - Google Patents
Air switch hunting instrument with socket line sequence detection function and detection method Download PDFInfo
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- CN114646903A CN114646903A CN202210252959.9A CN202210252959A CN114646903A CN 114646903 A CN114646903 A CN 114646903A CN 202210252959 A CN202210252959 A CN 202210252959A CN 114646903 A CN114646903 A CN 114646903A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/58—Testing of lines, cables or conductors
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R31/00—Arrangements for testing electric properties; Arrangements for locating electric faults; Arrangements for electrical testing characterised by what is being tested not provided for elsewhere
- G01R31/50—Testing of electric apparatus, lines, cables or components for short-circuits, continuity, leakage current or incorrect line connections
- G01R31/66—Testing of connections, e.g. of plugs or non-disconnectable joints
- G01R31/67—Testing the correctness of wire connections in electric apparatus or circuits
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Abstract
The invention discloses an air switch hunting instrument with socket line sequence detection and a detection method, the hunting instrument comprises a transmitter and a receiver which are matched with each other for use, the transmitter comprises a safety protection module, a power socket line sequence detection module and a signal generation oscillation module, the power socket line sequence detection module and the signal generation oscillation module are respectively connected with the safety protection module, the receiver comprises an LC probe receiving frequency selection module and a secondary operational amplifier module, the LC probe is connected to the signal input end of the second-stage operational amplifier module, the signal output end of the second-stage operational amplifier module is connected with the input end of the detection module, the output end of the detection module is connected with the data end of the signal processing module, the audio driving module is connected with the signal processing module, and the power supply module is used for supplying power.
Description
Technical Field
The invention discloses a hunting instrument, in particular to an air switch hunting instrument with socket line sequence detection and a detection method.
Background
In daily life, the most commonly used electrical line tests include: the hot wire, the zero wire, the ground wire and the connecting wire of the socket and socket load equipment controlled correspondingly by each air switch (air switch for short) and the like. Under the condition of the prior art, electricians mainly detect the wrong wiring sequence of the socket by manually disassembling the socket, and the detection of the electric appliance controlled by the air switch mainly eliminates a non-conductive load by disconnecting the switch. The electric line detection technology is limited by the principle of the electric line detection technology, and the problems of low detection efficiency and poor detection accuracy exist. Therefore, there is a need in the art to develop a device capable of simultaneously performing a connection sequence check of a socket and a performance detection of a corresponding device for an air switch control, so as to solve the problems of low detection efficiency and poor detection accuracy of the existing electrical line detection technology.
Disclosure of Invention
In view of the above-mentioned disadvantage that the performance detection operation of the socket connection sequence check and the corresponding device of the idle switch control is complex in the prior art, the invention provides an idle switch hunting instrument with socket line sequence detection, which comprises a hunting detection part and a line sequence detection part, and can not only efficiently perform the electric line hunting detection, but also detect the line sequence.
The technical scheme adopted by the invention for solving the technical problems is as follows: the utility model provides a take empty of socket line preface detection to open hunting appearance, the hunting appearance is including transmitter and the receiver that mutually supports and use, the transmitter includes safety protection module, supply socket line preface detection module and signal generation oscillation module are connected with safety protection module respectively, the receiver includes that LC probe receives the frequency selection module, second grade operational amplifier amplification module, the detection module, singlechip signal processing module, audio drive module and power module, LC probe receiving frequency selection module is connected on second grade operational amplifier amplification module's signal input end, second grade operational amplifier amplification module's signal output part is connected with detection module's input, detection module's output and signal processing module's data end are connected, audio drive module is connected with signal processing module, power module is used for the power supply.
The technical scheme adopted by the invention for solving the technical problem further comprises the following steps:
the safety protection module comprises a plug J2, a capacitor C14, an inductor L3, a capacitor C15 and a capacitor C17, wherein the plug J2 is a three-phase plug, the capacitor C14 is bridged between a live wire interface and a zero wire interface of the plug J2, the inductor L3 is connected in series to the zero wire interface and the live wire interface, the capacitor C15 is connected between a live wire end L and a grounding end E, and the capacitor C17 is connected between a leading section N and the grounding end E.
The power socket line sequence detection module comprises a resistor R20, a resistor R21, a resistor R22, a light emitting diode LED2, a light emitting diode LED3 and a light emitting diode LED4, the resistor R20 and the light emitting diode LED4 are connected between a live line end L and a zero line end N in series, the resistor R21 and the light emitting diode LED3 are connected between the zero line end N and a grounding end E in series, the resistor R22 and the light emitting diode LED2 are connected between the live line end L and the grounding end E in series, a diode D5 is further connected between the live line end L and the zero line end N, a diode D5 and the light emitting diode LED4 are connected in series in the same direction, a diode D6 is further connected between the live line end L and the grounding end E in series, the diode D6 and the light emitting diode LED2 are connected in series in the same direction, a diode D4 is further connected between the zero line end N and the grounding end E, and a diode D4 and the light emitting diode LED3 are connected in series in the same direction.
The signal generation oscillation module comprises a trigger diode Q4, a diode D2, a diode D3, a capacitor C16, a capacitor C18, a resistor R18 and a resistor R19, wherein the anode of the diode D2 is connected with a live wire end L, the cathode of the diode D2 is connected with one end of the capacitor C6, the anode of the diode D3 is connected with a zero line end N, the cathode of the diode D3 is connected with the other end of the capacitor C6, one end of the trigger diode Q4 is connected with the zero line end N, the other end of the trigger diode Q4 is connected with one end of the resistor R19, the other end of the resistor R19 is connected with the cathode of the diode D2, the capacitor C18 is connected with a resistor R19 in parallel, and the resistor R18 is connected with a capacitor C16 in parallel.
The LC probe receiving frequency selection module comprises a capacitor C19 and an inductor L2, the capacitor C19 is connected with the inductor L2 in parallel, the inductor L2 is 680uH, the parallel capacitor C19 is 330nF, the resonance frequency is 10.625KHZ, the front end of the LC probe receiving frequency selection module is connected with a voltage division resistor network, the voltage division resistor network comprises a resistor R31 and a resistor R32 which are connected between a positive power supply and the ground in series, the common end of the resistor R31 and the resistor R32 is connected with the LC probe receiving frequency selection module, the capacitor C18 is connected with the resistor R32 in parallel, and the rear end of the LC probe receiving frequency selection module is connected with the secondary operational amplifier module.
The second-stage operational amplification module comprises a first-stage amplification module and a second-stage amplification module, the output end of the LC probe receiving frequency selection module is connected with the input end of the first-stage amplification module, the output end of the first-stage amplification module is connected with the input end of the second-stage amplification module, the output end of the second-stage amplification module is connected with the input end of the detection module, the first-stage amplification module comprises an operational amplifier U5B, a capacitor C20, a resistor R34, a resistor R33 and a capacitor C26, the output end of the LC probe receiving frequency selection module is connected with the equidirectional input end of the operational amplifier U5B, the inverting input end of the operational amplifier U5B is grounded through a resistor R33 and a capacitor C26 which are connected in series, the capacitor C20 is connected between the equidirectional input end and the inverting input end of the operational amplifier U5B, the resistor R34 is connected between the inverting input end and the output end of the operational amplifier U5B, and the second-stage amplification module comprises an operational amplifier U51, a frequency selection module and a detection module, The output end of the first-stage amplification module is connected with the same-direction input end of an operational amplifier U5A, the inverting input end of the operational amplifier U5A is grounded through a resistor R35 and a capacitor C27 which are connected in series, a capacitor C21 is connected between the same-direction input end and the inverting input end of the operational amplifier U5A, and a resistor R36 is connected between the inverting input end and the output end of the operational amplifier U5B.
The detection module comprises an amplifier U5D, a diode D4, a resistor R39, a resistor R40, a resistor R41, a capacitor C24 and a capacitor C25, the output end of the secondary operational amplifier amplification module is connected to the non-inverting input end of the amplifier U5D, a diode D4 and a resistor R41 are connected to the output end of the amplifier U5D in series, a resistor R40 is connected between the inverting input end of the amplifier U5D and the common end of the diode D4 and the resistor R41, a resistor R6852 is connected between the inverting input end of the amplifier U5D and the ground, a capacitor C41 is connected between the common end of the diode D4 and the resistor R41 and the ground, a capacitor C41 is connected between the other end of the resistor R41 and the ground, a capacitor C41 and a resistor R41 are connected between the secondary operational amplifier amplification module and the detection module in series, and a resistor R41 is connected between the common end of the ground.
The detection module further comprises a secondary detection module, the secondary detection module comprises an amplifier U5C, a diode D7, a resistor R42, a resistor R45, a resistor R46, a capacitor C29 and a capacitor C30, the output end of the secondary operational amplifier amplification module is connected to the non-inverting input end of the amplifier U5C, a diode D7 and a resistor R46 are connected to the output end of the amplifier U5C in series, a resistor R42 is connected between the inverting input end of the amplifier U5C and the common end of the diode D7 and the resistor R47, a resistor R45 is connected between the inverting input end of the amplifier U5C and the ground, a capacitor C46 is connected between the common end of the diode D7 and the resistor R46 and the ground, a capacitor C46 and a resistor R46 are connected between the other end of the resistor R46 and the ground, a capacitor C46 and a resistor R46 are connected between the common end of the secondary operational amplifier module and the detection module in series, and the ground.
The audio driving module comprises an operational amplifier U1 and a power amplifier U2, the data output end of the signal processing module is connected with the inverting input end of the operational amplifier U1, a capacitor C2 is connected in series between the data output end of the signal processing module and the inverting input end of the operational amplifier U1, the power amplifier circuit comprises a resistor R2 and a resistor R4, a capacitor C3 is connected between the common end of the resistor R2 and the resistor R4 and the ground, a resistor R3 is connected between the common end of the resistor R2 and the resistor R4 and the output end of an operational amplifier U1, a capacitor C4 is connected between the inverting input end of the operational amplifier U1 and the output end of the operational amplifier U1, the non-inverting input end of the operational amplifier U1 is connected with a reference power supply, the output end of the operational amplifier U1 is connected with the input end of a power amplifier U2, the output end of the power amplifier U2 is connected with a loudspeaker P1, and a capacitor C5 and a resistor R5 are connected between the output end of the operational amplifier U1 and the input end of the power amplifier U2 in series.
The detection method of the air switch hunting instrument with the socket line sequence detection comprises hunting detection and line sequence detection, wherein
The line sequence detection is to connect the transmitter of the invention into a socket, judge whether the line sequence is correct according to the lighting condition of the LED lamp, and specifically refer to the following table:
| LED2 | LED3 | LED4 | |
| correction of | Bright Light (LIGHT) | NO | Bright Light (LIGHT) |
| Lack of live wire | NO | NO | NO |
| Zero line | Bright Light (LIGHT) | NO | NO |
| Ground wire lack | NO | NO | Bright Light (LIGHT) |
| Fire-zero misconnection | NO | Bright Light (LIGHT) | Bright Light (LIGHT) |
| Fire ground misconnection | Bright Light (LIGHT) | Bright Light (LIGHT) | NO |
| Misconnection of fire and earth and non-connection of earth | Bright and bright | Bright Light (LIGHT) | Bright Light (LIGHT) |
The line-seeking detection is that a signal generation oscillation module generates oscillation signals, the oscillation signals are input into an electric wire through a safety protection module, an LC probe receives the oscillation signals in the electric wire detected by a frequency selection module, the oscillation signals are amplified by a secondary operational amplifier module and then input to a detection module, the oscillation signals are detected by the detection module and then output to a signal processing module, the signal processing module judges the oscillation signals, the signal processing module outputs alarm signals to an audio driving module, and the audio driving module drives a loudspeaker to produce sound.
The invention has the beneficial effects that: the invention comprises a line-seeking detection part and a line sequence detection part, which can not only carry out the line-seeking detection of the electric line with high efficiency, but also detect the line-seeking sequence. The invention integrates the detector into the instrument, can quickly and accurately realize the installation and construction of the strong-current cable, reduces the possibility of error and the time wasted by manual searching, greatly improves the installation efficiency and saves the cost.
The invention will be further described with reference to the accompanying drawings and specific embodiments.
Drawings
Fig. 1 is a schematic circuit diagram of a transmitter portion of the present invention.
Fig. 2 is a schematic diagram of a receiver portion of the present invention.
FIG. 3 is a schematic diagram of the circuit of the alarm signal amplification part of the present invention.
Fig. 4 is a schematic circuit diagram of the audio driving part of the present invention.
Fig. 5 is a schematic diagram of a part of a circuit of the LC probe receiving frequency-selecting module of the present invention.
Fig. 6 is a schematic circuit diagram of a two-stage amplifying part according to the present invention.
FIG. 7 is a schematic diagram of a detection module according to the present invention.
Fig. 8 is a schematic diagram of a part of the circuit of the safety protection module of the invention.
Fig. 9 is a schematic circuit diagram of a part of the signal generating oscillation module according to the present invention.
Fig. 10 is a schematic circuit diagram of a part of the power socket line sequence detection module according to the present invention.
Detailed Description
The present embodiment is a preferred embodiment of the present invention, and other principles and basic structures that are the same as or similar to the present embodiment are within the scope of the present invention.
Referring now to fig. 1-10 in combination, the present invention includes a transmitter (i.e., a main unit) and a receiver (i.e., a hand-held sub-unit) that cooperate with each other. The transmitter comprises a 220V safety protection module, a power socket line sequence detection module and a signal generation oscillation module, wherein the power socket line sequence detection module and the signal generation oscillation module are respectively connected with the safety protection module.
The receiver includes that the LC probe receives the frequency selection module, second grade operational amplifier module, the detection module, singlechip signal processing module, audio drive module and power end, the LC probe receives the frequency selection module and connects on second grade operational amplifier module's signal input end, second grade operational amplifier module's signal output part is connected with the input of detection module, the output of detection module is connected with signal processing module's data terminal, audio drive module is connected with signal processing module, power module is used for the power supply.
In this embodiment, the 220V safety protection module includes a plug J2, a capacitor C14, an inductor L3, a capacitor C15, and a capacitor C17, the plug J2 is a three-phase plug (i.e., includes a live wire interface, a neutral wire interface, and a ground wire interface, respectively), the capacitor C14 is bridged between the live wire interface and the neutral wire interface, the inductor L3 is connected in series to the neutral wire interface and the live wire interface, the capacitor C15 is connected between the live wire end L and a ground terminal E, and the capacitor C17 is connected between the leading segment N and the ground terminal E. A double pi-shaped filter network consisting of the resistor C14, the inductor L3, the capacitor C15 and the capacitor C17 mainly suppresses electromagnetic noise and clutter signals of an input power supply, prevents the interference on the power supply, and simultaneously prevents high-frequency clutter generated by the power supply from interfering a power grid. In this embodiment, a fuse F1 is connected in series to the live wire interface for overcurrent protection.
In this embodiment, the power socket line sequence detection module includes a resistor R20, a resistor R21, a resistor R22, a light emitting diode LED2, a light emitting diode LED3, and a light emitting diode LED4, where the resistor R20 and the light emitting diode LED4 are connected in series between the live line terminal L and the neutral line terminal N, the resistor R21 and the light emitting diode LED3 are connected in series between the neutral line terminal N and the ground terminal E, and the resistor R22 and the light emitting diode LED2 are connected in series between the live line terminal L and the ground terminal E. In this embodiment, a diode D5 is further connected between the live line end L and the neutral line end N, a diode D5 is connected in series with the light emitting diode LED4 in the same direction, that is, the conduction direction of the diode D5 and the light emitting diode LED4 is toward the drum, a diode D6 is further connected between the live line end L and the ground end E, the diode D6 is connected in series with the light emitting diode LED2 in the same direction, a diode D4 is further connected between the neutral line end N and the ground end E, and a diode D4 is connected in series with the light emitting diode LED3 in the same direction. In this embodiment, the current limiting resistor is composed of 3 1N4007 diodes and 3 LEDs, and the resistor R20, the resistor R21, and the resistor R22 are 68K Ω resistors and serve as current limiting resistors of the LEDs. When the power socket line sequence detection is carried out, the detection results can refer to the following table:
| LED2 | LED3 | LED4 | |
| correction of | Bright Light (LIGHT) | NO | Bright and bright |
| Lack of live wire | NO | NO | NO |
| Zero line | Bright Light (LIGHT) | NO | NO |
| Ground wire lack | NO | NO | Bright Light (LIGHT) |
| Fire and zero misconnection | NO | Bright Light (LIGHT) | Bright Light (LIGHT) |
| Fire ground misconnection | Bright Light (LIGHT) | Bright Light (LIGHT) | NO |
| Misconnection of fire and earth and disconnection of earth | Bright Light (LIGHT) | Bright Light (LIGHT) | Bright Light (LIGHT) |
In this embodiment, the signal generation oscillation module includes a trigger diode Q4, a diode D2, a diode D3, a capacitor C16, a capacitor C18, a resistor R18, and a resistor R19, an anode of the diode D2 is connected to the live line terminal L, a cathode of the diode D2 is connected to one end of the capacitor C6, an anode of the diode D3 is connected to the neutral line terminal N, a cathode of the diode D3 is connected to the other end of the capacitor C6, one end of the trigger diode Q4 is connected to the neutral line terminal N, the other end of the trigger diode Q4 is connected to one end of the resistor R19, the other end of the resistor R19 is connected to a cathode of the diode D2, the capacitor C18 is connected to the resistor R19 in parallel, and the resistor R18 is connected to the capacitor C16 in parallel. When the alternating current of 220V is positive for a half cycle, the power supply charges a capacitor C16 through a resistor R19 and a trigger diode Q4, so that high-frequency oscillation pulses are formed in loops of a live wire end L and a zero wire end N; when the alternating current is in a negative half cycle, the power supply forms a loop through the diode D3, the resistor R18, the capacitor C18 and the trigger diode Q4 to form high-frequency oscillation pulses, so that high-frequency trigger pulse signals can be generated in both the positive half cycle and the negative half cycle and pass through the plug J2.
In this embodiment, the LC probe receiving frequency-selecting module includes a capacitor C19 and an inductor L2, the capacitor C19 and the inductor L2 are connected in parallel, and are used as an LC probe for receiving a resonant signal, in this embodiment, the inductor L2 is 680uH, the parallel capacitor C19 is 330nF, and the resonant frequency is 10.625 KHZ. The front end (or one end) of the LC probe receiving frequency selection module is connected with a voltage-dividing resistor network, the voltage-dividing resistor network comprises a resistor R31 and a resistor R32 which are connected between a positive power supply (+5V power supply) and the ground in series, the common end of the resistor R31 and the resistor R32 is connected with the LC probe receiving frequency selection module, a capacitor C18 is connected with the resistor R32 in parallel, and the rear end (or the other end or the output end) of the LC probe receiving frequency selection module is connected with the secondary operational amplifier module.
In this embodiment, the second-stage operational amplifier module includes a first-stage amplifier module and a second-stage amplifier module, an output end of the LC probe receiving frequency selection module is connected to an input end of the first-stage amplifier module, an output end of the first-stage amplifier module is connected to an input end of the second-stage amplifier module, and an output end of the second-stage amplifier module is connected to an input end of the detection module. In this embodiment, the first-stage amplification module includes an operational amplifier U5B, a capacitor C20, a resistor R34, a resistor R33, and a capacitor C26, an output terminal of the LC probe receiving frequency selection module is connected to a same-direction input terminal of the operational amplifier U5B, an inverting-phase input terminal of the operational amplifier U5B is grounded through a resistor R33 and a capacitor C26 connected in series, a capacitor C20 is connected between the same-direction input terminal and an inverting-phase input terminal of the operational amplifier U5B, and a resistor R34 is connected between the inverting-phase input terminal and an output terminal of the operational amplifier U5B. In this embodiment, the second-stage amplification module includes an operational amplifier U51, a capacitor C21, a resistor R36, a resistor R35, and a capacitor C27, an output end of the first-stage amplification module is connected to a unidirectional input end of the operational amplifier U5A, an inverting input end of the operational amplifier U5A is grounded through the resistor R35 and the capacitor C27 which are connected in series, the capacitor C21 is connected between the unidirectional input end and the inverting input end of the operational amplifier U5A, and the resistor R36 is connected between the inverting input end and the output end of the operational amplifier U5B.
In this embodiment, the resistor R34 is a 150K Ω resistor, and the resistor R33 is a 10K Ω resistor, so in this embodiment, the amplification factor of the first-stage amplification module is:
AU1＝1+(R32/R33)＝1+(150k/10k)＝16；
in this embodiment, the resistor R36 is a 100K Ω resistor, and the resistor R35 is a 9.1K Ω resistor, so in this embodiment, the amplification factor of the second-stage amplification module is:
AU2＝1+(R30/R31)＝1+(100k/9.1k)＝12；
the total amplification factor of the second-stage operational amplifier module is as follows: AU1 AU2 is 16, 12, 192.
In this embodiment, the detection module includes an amplifier U5D, a diode D4, a resistor R39, a resistor R40, a resistor R41, a capacitor C24 and a capacitor C25, an output terminal of the second-stage operational amplifier module is connected to a non-inverting input terminal of the amplifier U5D, the diode D4 and the resistor R41 are connected in series to an output terminal of the amplifier U5D, a resistor R40 is connected between an inverting input terminal of the amplifier U5D and a common terminal of the diode D4 and the resistor R41, a resistor R39 is connected between the inverting input terminal of the amplifier U5D and ground, a capacitor C24 is connected between the common terminal of the diode D4 and the resistor R41 and ground, and a capacitor C25 is connected between the other terminal of the resistor R41 and ground. The amplifier U5D, the diode D4, the resistor R39, the resistor R40, the resistor R41, the capacitor C24 and the capacitor C25 can detect out the signals of the positive half cycle, and then the signals can be transmitted to an ADC interface of the signal processing module for collection and processing. In this embodiment, a zener diode D5 and a zener diode D6 are connected between the output end of the detection module and ground.
In this embodiment, a capacitor C23 and a resistor R38 connected in series are connected between the second-stage operational amplifier module and the detector module, and a resistor R37 is connected between the common end of the capacitor C23 and the resistor R38 and the ground.
In this embodiment, the detection module further includes a secondary detection module, the secondary detection module includes an amplifier U5C, a diode D7, a resistor R42, a resistor R45, a resistor R46, a capacitor C29 and a capacitor C30, an output end of the secondary operational amplifier amplification module is connected to a non-inverting input end of the amplifier U5C, the diode D7 and the resistor R46 are connected in series to an output end of the amplifier U5C, a resistor R42 is connected between an inverting input end of the amplifier U5C and a common end of the diode D7 and the resistor R47, a resistor R45 is connected between the inverting input end of the amplifier U5C and ground, a capacitor C29 is connected between a common end of the diode D7 and the resistor R46 and ground, and a capacitor C30 is connected between the other end of the resistor R46 and ground. The amplifier U5C, the diode D7, the resistor R42, the resistor R45, the resistor R46, the capacitor C29 and the capacitor C30 can detect the signal of the positive half cycle of the signal amplified by the first stage, and then can transmit the signal to an ADC interface of the signal processing module for acquisition and processing.
In this embodiment, the output of the signal CH1 (i.e., the primary detection module) is amplified by two stages and then detected, and the output of the signal CH2 (i.e., the secondary detection module) is detected by one stage of amplification, which can be conveniently adjusted according to the strength of the signal, so as to satisfy the range of the measurement range of the ADC acquisition.
In this embodiment, a capacitor C28 and a resistor R44 connected in series are connected between the second-stage operational amplifier module and the detector module, and a resistor R43 is connected between the common end of the capacitor C28 and the resistor R44 and the ground.
In this embodiment, the audio driving module includes an operational amplifier U1 and a power amplifier U2, a data output end of the signal processing module is connected to an inverting input end of the operational amplifier U1, the signal processing module outputs a PWM model to the operational amplifier U1, a capacitor C2, a resistor R2 and a resistor R4 are connected in series between the data output end of the signal processing module and the inverting input end of the operational amplifier U1, a capacitor C3 is connected between a common end of the resistor R2 and the resistor R4 and ground, a resistor R3 is connected between a common end of the resistor R2 and the resistor R4 and an output end of the operational amplifier U1, a capacitor C4 is connected between the inverting input end of the operational amplifier U1 and an output end of the operational amplifier U1, and a non-inverting input end of the operational amplifier U1 is connected to a reference power supply.
In this embodiment, the output end of the operational amplifier U1 is connected to the input end of the power amplifier U2, the output end of the power amplifier U2 is connected to the speaker P1, the speaker P1 is directly driven to sound through the power amplifier U2, and the capacitor C5 and the resistor R5 are connected in series between the output end of the operational amplifier U1 and the input end of the power amplifier U2. The signal processing module outputs a PWM signal with a certain frequency (the frequency can be freely set) to the operational amplifier U1, a preposed voltage amplifying circuit formed by the operational amplifier U1 is amplified by the operational amplifier U1 and then output to the power amplifier U2, and the power amplifier U2 drives a loudspeaker to make sound.
In this embodiment, the signal processing module is a single chip microcomputer, and various types of single chip microcomputers in the prior art can realize the function, so that the type of the single chip microcomputer is not limited in the invention, and the single chip microcomputer can be commercially available. The power module adopts the lithium battery to output power after passing through the voltage stabilizing module, and the circuit structure can adopt a conventional circuit structure.
The invention also discloses a detection method of the air switch hunting instrument with the socket line sequence detection, which comprises hunting detection and line sequence detection, wherein the hunting detection and the line sequence detection are adopted
The line sequence detection is to connect the transmitter of the invention into a socket, judge whether the line sequence is correct according to the lighting condition of the LED lamp, and specifically refer to the following table:
| LED2 | LED3 | LED4 | |
| correction of | Bright Light (LIGHT) | NO | Bright Light (LIGHT) |
| Lack of live wire | NO | NO | NO |
| Zero line | Bright Light (LIGHT) | NO | NO |
| Ground wire lack | NO | NO | Bright Light (LIGHT) |
| Fire-zero misconnection | NO | Bright Light (LIGHT) | Bright Light (LIGHT) |
| Fire ground misconnection | Bright Light (LIGHT) | Bright Light (LIGHT) | NO |
| Misconnection of fire and earth and non-connection of earth | Bright Light (LIGHT) | Bright Light (LIGHT) | Bright Light (LIGHT) |
The line-seeking detection is that a signal generation oscillation module generates oscillation signals, the oscillation signals are input into an electric wire through a safety protection module, an LC probe receives the oscillation signals in the electric wire detected by a frequency selection module, the oscillation signals are amplified by a secondary operational amplifier module and then input to a detection module, the oscillation signals are detected by the detection module and then output to a signal processing module, the signal processing module judges the oscillation signals, the signal processing module outputs alarm signals to an audio driving module, and the audio driving module drives a loudspeaker to produce sound.
The invention comprises a line-seeking detection part and a line sequence detection part, which can not only carry out the line-seeking detection of the electric line with high efficiency, but also detect the line-seeking sequence. The invention integrates the detector into the instrument, can quickly and accurately realize the installation and construction of the strong-current cable, reduces the possibility of error and the time wasted by manual searching, greatly improves the installation efficiency and saves the cost.
Claims (10)
1. The utility model provides a take empty appearance of hunting that opens that socket line preface detected which characterized by: the hunting appearance including transmitter and the receiver that mutually supports and use, the transmitter includes safety regulation protection module, supply socket line preface detection module and signal generation oscillation module are connected with safety regulation protection module respectively, the receiver includes that the LC probe receives the selection frequency module, second grade operational amplifier amplification module, the detection module, singlechip signal processing module, audio drive module and power module, the LC probe is received the selection frequency module and is connected on second grade operational amplifier amplification module's signal input end, second grade operational amplifier amplification module's signal output part is connected with the input of detection module, the output of detection module is connected with signal processing module's data terminal, audio drive module is connected with signal processing module, power module is used for the power supply.
2. The air switch hunting instrument with socket line sequence detection according to claim 1, characterized in that: the safety protection module comprises a plug J2, a capacitor C14, an inductor L3, a capacitor C15 and a capacitor C17, wherein the plug J2 is a three-phase plug, the capacitor C14 is bridged between a live wire interface and a zero wire interface of the plug J2, the inductor L3 is connected in series to the zero wire interface and the live wire interface, the capacitor C15 is connected between a live wire end L and a grounding end E, and the capacitor C17 is connected between a leading section N and the grounding end E.
3. The air switch hunting instrument with socket line sequence detection according to claim 1, characterized in that: the power socket line sequence detection module comprises a resistor R20, a resistor R21, a resistor R22, a light-emitting diode LED2, a light-emitting diode LED3 and a light-emitting diode LED4, the resistor R20 and the light-emitting diode LED4 are connected between a live wire end L and a zero wire end N in series, the resistor R21 and the light-emitting diode LED3 are connected between the zero wire end N and a grounding end E in series, the resistor R22 and the light-emitting diode LED2 are connected between the live wire end L and the grounding end E in series, a diode D5 is further connected between the live wire end L and the zero wire end N, the diode D5 and the light-emitting diode LED4 are connected in series in the same direction, a diode D6 is further connected between the live wire end L and the grounding end E in series, a diode D6 and the light-emitting diode LED2 are connected in series in the same direction, a diode D4 is further connected between the zero wire end N and the grounding end E, and the diode D4 and the light-emitting diode LED3 are connected in series in the same direction.
4. The air switch hunting instrument with socket line sequence detection according to claim 1, characterized in that: the signal generation oscillation module comprises a trigger diode Q4, a diode D2, a diode D3, a capacitor C16, a capacitor C18, a resistor R18 and a resistor R19, wherein the anode of the diode D2 is connected with a live wire end L, the cathode of the diode D2 is connected with one end of the capacitor C6, the anode of the diode D3 is connected with a zero line end N, the cathode of the diode D3 is connected with the other end of the capacitor C6, one end of the trigger diode Q4 is connected with the zero line end N, the other end of the trigger diode Q4 is connected with one end of the resistor R19, the other end of the resistor R19 is connected with the cathode of the diode D2, the capacitor C18 is connected with a resistor R19 in parallel, and the resistor R18 is connected with a capacitor C16 in parallel.
5. The air switch hunting instrument with socket line sequence detection according to claim 1, characterized in that: the LC probe receiving frequency selection module comprises a capacitor C19 and an inductor L2, the capacitor C19 is connected with the inductor L2 in parallel, the inductor L2 is 680uH, the parallel capacitor C19 is 330nF, the resonance frequency is 10.625KHZ, the front end of the LC probe receiving frequency selection module is connected with a voltage division resistor network, the voltage division resistor network comprises a resistor R31 and a resistor R32 which are connected between a positive power supply and the ground in series, the common end of the resistor R31 and the resistor R32 is connected with the LC probe receiving frequency selection module, the capacitor C18 is connected with the resistor R32 in parallel, and the rear end of the LC probe receiving frequency selection module is connected with the secondary operational amplifier module.
6. The air switch hunting instrument with socket line sequence detection according to claim 1, characterized in that: the second-stage operational amplification module comprises a first-stage amplification module and a second-stage amplification module, the output end of the LC probe receiving frequency selection module is connected with the input end of the first-stage amplification module, the output end of the first-stage amplification module is connected with the input end of the second-stage amplification module, the output end of the second-stage amplification module is connected with the input end of the detection module, the first-stage amplification module comprises an operational amplifier U5B, a capacitor C20, a resistor R34, a resistor R33 and a capacitor C26, the output end of the LC probe receiving frequency selection module is connected with the equidirectional input end of the operational amplifier U5B, the inverting input end of the operational amplifier U5B is grounded through a resistor R33 and a capacitor C26 which are connected in series, the capacitor C20 is connected between the equidirectional input end and the inverting input end of the operational amplifier U5B, the resistor R34 is connected between the inverting input end and the output end of the operational amplifier U5B, and the second-stage amplification module comprises an operational amplifier U51, a frequency selection module and a detection module, The output end of the first-stage amplification module is connected with the same-direction input end of an operational amplifier U5A, the inverting input end of the operational amplifier U5A is grounded through a resistor R35 and a capacitor C27 which are connected in series, a capacitor C21 is connected between the same-direction input end and the inverting input end of the operational amplifier U5A, and a resistor R36 is connected between the inverting input end and the output end of the operational amplifier U5B.
7. The air switch hunting instrument with socket line sequence detection according to claim 1, characterized in that: the detection module comprises an amplifier U5D, a diode D4, a resistor R39, a resistor R40, a resistor R41, a capacitor C24 and a capacitor C25, the output end of the secondary operational amplifier amplification module is connected to the non-inverting input end of the amplifier U5D, a diode D4 and a resistor R41 are connected to the output end of the amplifier U5D in series, a resistor R40 is connected between the inverting input end of the amplifier U5D and the common end of the diode D4 and the resistor R41, a resistor R39 is connected between the inverting input end of the amplifier U5D and the ground, a capacitor C24 is connected between the common end of the diode D4 and the resistor R41 and the ground, a capacitor C25 is connected between the other end of the resistor R41 and the ground, a capacitor C23 and a resistor R38 which are connected in series are connected between the secondary operational amplifier amplification module and the detection module, and a resistor R23 and a resistor R38 are connected between the common end and the ground with a resistor R37.
8. The air switch hunting instrument with socket line sequence detection according to claim 1, characterized in that: the detection module further comprises a secondary detection module, the secondary detection module comprises an amplifier U5C, a diode D7, a resistor R42, a resistor R45, a resistor R46, a capacitor C29 and a capacitor C30, the output end of the secondary operational amplifier amplification module is connected to the non-inverting input end of the amplifier U5C, a diode D7 and a resistor R46 are connected to the output end of the amplifier U5C in series, a resistor R42 is connected between the inverting input end of the amplifier U5C and the common end of the diode D7 and the resistor R47, a resistor R45 is connected between the inverting input end of the amplifier U5C and the ground, a capacitor C46 is connected between the common end of the diode D7 and the resistor R46 and the ground, a capacitor C46 and a resistor R46 are connected between the other end of the resistor R46 and the ground, a capacitor C46 and a resistor R46 are connected between the common end of the secondary operational amplifier module and the detection module in series, and the ground.
9. The air switch hunting instrument with socket line sequence detection according to claim 1, characterized in that: the audio driving module comprises an operational amplifier U1 and a power amplifier U2, the data output end of the signal processing module is connected with the inverting input end of the operational amplifier U1, a capacitor C2 is connected in series between the data output end of the signal processing module and the inverting input end of the operational amplifier U1, the power amplifier circuit comprises a resistor R2 and a resistor R4, a capacitor C3 is connected between the common end of the resistor R2 and the resistor R4 and the ground, a resistor R3 is connected between the common end of the resistor R2 and the resistor R4 and the output end of an operational amplifier U1, a capacitor C4 is connected between the inverting input end of the operational amplifier U1 and the output end of the operational amplifier U1, the non-inverting input end of the operational amplifier U1 is connected with a reference power supply, the output end of the operational amplifier U1 is connected with the input end of a power amplifier U2, the output end of the power amplifier U2 is connected with a loudspeaker P1, and a capacitor C5 and a resistor R5 are connected between the output end of the operational amplifier U1 and the input end of the power amplifier U2 in series.
10. A detection method using the line sequence detection-equipped line sequence detector of any one of claims 1 to 9, the method comprising line sequence detection and line sequence detection, wherein the line sequence detection is to connect the transmitter of the present invention into a socket, and determine whether the line sequence is correct according to the lighting condition of an LED lamp, specifically referring to the following table:
the line-seeking detection is that a signal generation oscillation module generates oscillation signals, the oscillation signals are input into an electric wire through a safety protection module, an LC probe receives the oscillation signals in the electric wire detected by a frequency selection module, the oscillation signals are amplified by a secondary operational amplifier module and then input to a detection module, the oscillation signals are detected by the detection module and then output to a signal processing module, the signal processing module judges the oscillation signals, the signal processing module outputs alarm signals to an audio driving module, and the audio driving module drives a loudspeaker to produce sound.
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210252959.9A CN114646903A (en) | 2022-03-15 | 2022-03-15 | Air switch hunting instrument with socket line sequence detection function and detection method |
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| CN202210252959.9A CN114646903A (en) | 2022-03-15 | 2022-03-15 | Air switch hunting instrument with socket line sequence detection function and detection method |
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| CN114646903A true CN114646903A (en) | 2022-06-21 |
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| CN202210252959.9A Pending CN114646903A (en) | 2022-03-15 | 2022-03-15 | Air switch hunting instrument with socket line sequence detection function and detection method |
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| CN2128389Y (en) * | 1992-02-28 | 1993-03-17 | 钟茂干 | Electric leakage equipment and " wire sequence " tester for building |
| CN2331099Y (en) * | 1998-04-01 | 1999-07-28 | 康文兆 | Multifunctional display type safe socket |
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