CN112345886A - Detection circuit, device and method - Google Patents

Detection circuit, device and method Download PDF

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Publication number
CN112345886A
CN112345886A CN202011290737.3A CN202011290737A CN112345886A CN 112345886 A CN112345886 A CN 112345886A CN 202011290737 A CN202011290737 A CN 202011290737A CN 112345886 A CN112345886 A CN 112345886A
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China
Prior art keywords
line
detection
detected
detection unit
power
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CN202011290737.3A
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Chinese (zh)
Inventor
陈杰聪
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Wulian intelligent (Shandong) Group Co.,Ltd.
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Guangdong Wulian Intelligent Technology Co ltd
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Priority to CN202011290737.3A priority Critical patent/CN112345886A/en
Publication of CN112345886A publication Critical patent/CN112345886A/en
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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
    • G01R31/08—Locating faults in cables, transmission lines, or networks
    • G01R31/081—Locating faults in cables, transmission lines, or networks according to type of conductors
    • G01R31/085—Locating faults in cables, transmission lines, or networks according to type of conductors in power transmission or distribution lines, e.g. overhead
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
    • G01R27/00—Arrangements for measuring resistance, reactance, impedance, or electric characteristics derived therefrom
    • G01R27/02—Measuring real or complex resistance, reactance, impedance, or other two-pole characteristics derived therefrom, e.g. time constant
    • 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
    • G01R31/12—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing
    • G01R31/1227—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials
    • G01R31/1263—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation
    • G01R31/1272—Testing dielectric strength or breakdown voltage ; Testing or monitoring effectiveness or level of insulation, e.g. of a cable or of an apparatus, for example using partial discharge measurements; Electrostatic testing of components, parts or materials of solid or fluid materials, e.g. insulation films, bulk material; of semiconductors or LV electronic components or parts; of cable, line or wire insulation of cable, line or wire insulation, e.g. using partial discharge measurements
    • 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
    • G01R31/52—Testing for short-circuits, leakage current or ground faults
    • 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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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)

Abstract

The invention discloses a detection circuit, a device and a method, wherein the circuit comprises: the main controller is used for connecting a zero line, a live line and a ground wire of the line to be detected; the output end of the detection module is connected with the main controller, the input end of the detection module is connected with the zero line, the live line and the ground wire of the power utilization line, and the detection module comprises a power supply detection unit, an RCD detection unit, a line sequence detection unit, an insulation detection unit, a resistance value detection unit and an analog load detection unit. The device comprises: the host computer comprises a shell, a power input end and the detection circuit. The method comprises the following steps: measuring voltage data between the live wire and the zero line and voltage data between the ground wire and the zero line by taking the zero line as a reference point, and detecting whether the line sequence is correct or not; detecting the sensitivity and the tripping time of the leakage protector; detecting the insulation value of the power line; the analog load detects whether the line is safe. The safety of the power line can be detected from multiple angles, time and labor are saved, and the detection efficiency is higher.

Description

Detection circuit, device and method
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to a detection circuit, a detection device, and a detection method.
Background
At present, the proportion of fire caused by electrical reasons in the total fire amount of China is at the first place. The reasons for the electrical fire are complex, which relate to the design, manufacture and installation of electrical equipment, and also relate to the maintenance management and safety precaution after the product is put into use, wherein the direct reasons for the electrical fire include the reasons of equipment overload, poor line contact, short circuit and the like. After the distribution line is laid, the user cannot know whether the distribution line is laid properly. The existing detection equipment generally detects the safety of the power line through single dimensionality such as load detection or line sequence detection, and cannot detect the safety of the power line from multiple dimensionalities, so that the safety of the power line is lack of comprehensive and comprehensive detection and evaluation. Of course, different dimensions of the power line can be detected through different devices, but the detection results of multiple dimensions are obtained by switching different detection devices, which consumes time and labor and is low in efficiency.
Disclosure of Invention
The invention aims to at least solve one of the technical problems in the prior art, and therefore, the invention provides a detection circuit, a detection device and a detection method, which can detect the safety of an electric line from multiple angles, are time-saving and labor-saving and have higher detection efficiency.
In a first aspect of the present invention, a detection circuit is provided, which includes: the main controller is used for connecting a zero line, a live line and a ground wire of the line to be detected; the detection module, the output end of the detection module is connected with the main controller, the input end of the detection module is used for connecting the zero line, the live line and the ground line of the line to be detected, the detection module comprises a power supply detection unit, an RCD detection unit, a line sequence detection unit, an insulation detection unit, a resistance value detection unit and an analog load detection unit, the power supply detection unit is used for respectively detecting the voltage data between the zero line and the live line of the line to be detected and the voltage data between the zero line and the ground line, the line sequence detection unit is used for determining the line sequence data of the live line, the ground line and the zero line, the resistance value detection unit is used for detecting the resistance value data of the live line, the ground line and the zero line of the line to be detected according to the line sequence data detected by the line sequence detection unit, the analog load detection unit is used for detecting the voltage drop data under various loads, the, the RCD detection unit is used for detecting the sensitivity and the tripping time of the leakage protector.
The detection circuit according to the embodiment of the first aspect of the present invention has at least the following beneficial effects: through main control unit control detection module, treat that the circuit that detects carries out power detection, RCD detects, line preface detects, insulation detection, resistance detects and analog load detects, can detect the safety of using electric wire way from many angles, can carry out a comprehensive and comprehensive detection to treating the circuit, need not switching equipment when carrying out the difference and detecting moreover, only need each circuit unit within a definite time cooperation control can accomplish, labour saving and time saving, detection efficiency is higher.
According to some embodiments of the present invention, the power detection device further comprises an auxiliary module, the auxiliary module is connected to one power interface of the line to be detected, the power interface includes output ends of a live wire, a ground wire and a zero wire, the auxiliary module is configured to send a signal to the one power interface of the line to be detected, and the main controller is configured to receive the signal sent by the auxiliary module at the other power interface. Due to the difference of the distances between the transformer and the power line, when the voltages of the live wire and the zero line and the voltages of the ground wire and the zero line are tested, the current fluctuation of the third line can be influenced, so that the accuracy of the detection result is influenced. And utilize auxiliary module, detect different circuits respectively when waiting to detect the circuit outage, can avoid receiving the influence of electric current fluctuation when the test, can effectively improve the precision of testing result.
According to some embodiments of the present invention, the detection circuit further comprises a wireless transmission module, the wireless transmission module is used for respectively connecting the main controller and the external terminal device, and the wireless transmission module is used for transmitting wireless communication information between the detection circuit and the external terminal device. The wireless transmission module can communicate with external terminal equipment, and sends a detection result to the terminal equipment, so that a user can check the detection result in real time. Or receiving an operation instruction of the external terminal equipment to perform correlation detection. The operation is simple and convenient, and the detection result can be obtained in real time.
According to some embodiments of the present invention, the leakage protector further comprises a memory, the memory is respectively connected to the detection module and the main controller, and the memory is configured to store detection data of the detection module, where the detection data includes voltage data, line sequence data, resistance data, voltage drop data, insulation value, and sensitivity and trip time data of the leakage protector.
According to some embodiments of the present invention, the RCD detection unit includes an RCD detection circuit, and the RCD detection circuit includes a photo coupler, the photo coupler is configured to receive a first current signal sent by the main controller, convert the first current signal into an optical signal, convert the optical signal into a second current signal, and transmit the second current signal to the line to be detected to detect the sensitivity and the trip time of the earth leakage protector. If the sensitivity is too high, the normal operation of the power line is influenced, and if the sensitivity is too low, the leakage protector cannot play a protection role. When RCD detection circuitry received the great electric current that main control unit sent, earth-leakage protector's reaction time was the trip time promptly, and the trip time overlength can make earth-leakage protector can't play the effect at the very first time of electric leakage, causes serious threat to the personal property.
According to some embodiments of the present invention, the display device further comprises a display module, the display module is respectively connected to the main controller and the detection module, and the main controller is configured to control the display module to display the detection data. The display module is arranged to display the detection result of the detection circuit on the power line in real time, so that a user can check the detection result conveniently.
In a second aspect of the present invention, there is provided a detection apparatus, comprising a host, wherein the host comprises a housing, a power input end and the detection circuit of the first aspect of the present invention, wherein the power input end is used for connecting a power interface of an electric line, and the power interface comprises output ends of a live wire, a ground wire and a zero wire.
The detection device according to the embodiment of the second aspect of the invention has at least the following advantages: through main control unit control detection module, carry out power detection, RCD to detect, line preface detects, insulating detection, resistance detects and analog load detects with the electric wire way, detects the safety of electric wire way from a plurality of angles. This detection device can detect the safety of power consumption circuit from many angles, can carry out a synthesis and comprehensive detection to power consumption circuit, does not need switch equipment when carrying out different detections moreover, only needs the circuit to cooperate control to accomplish, labour saving and time saving, and detection efficiency is higher.
According to some embodiments of the present invention, the mobile phone further includes an auxiliary module, the auxiliary module is used for connecting with one power interface of the line to be detected, the auxiliary module is used for sending a signal to the one power interface of the line to be detected when the circuit to be detected is powered off, and the host is used for receiving the signal sent by the auxiliary module at the other power interface to detect the line to be detected. The auxiliary machine sends a signal to one power interface of the line to be detected when the line to be detected is powered off, and the main machine receives the signal sent by the auxiliary machine at the other power interface and detects the line to be detected according to the received signal. The interference of the current fluctuation of the line can be effectively isolated, and the influence of the interference of the current fluctuation on the accuracy of the detection result is avoided. The accuracy of the calibration result can be effectively improved.
In a third aspect of the present invention, a detection method is provided, including: respectively detecting voltage data between the live wire and the zero line and voltage data between the ground wire and the zero line by taking the zero line as a reference point; acquiring line sequence data of a live line, a zero line and a ground line; sending a current signal to a line to be detected to acquire the sensitivity and the tripping time of the leakage protector; cutting off power supply to all loads of the line to be detected, and obtaining insulation values of a live wire, a zero line and a ground wire; and acquiring voltage drop data of the line to be detected after the line is accessed to the analog load unit.
The detection method according to the embodiment of the third aspect of the invention has at least the following beneficial effects: through carrying out power detection, RCD to detect, line sequence detects, insulating detection, resistance detects and analog load detects with the electric wire way, detects the safety of electric wire way from many angles, can carry out a comprehensive and comprehensive detection to the electric wire way, detect comprehensively and the accuracy is high.
According to some embodiments of the invention, further comprising the steps of: sending a signal to one power interface in a circuit to be detected through the auxiliary module, receiving the signal at the other power interface by the main controller to detect the circuit to be detected, wherein the power interface comprises output ends of the live wire, the ground wire and the zero line; and receiving a detection instruction and outputting detection data.
Additional aspects and advantages of the invention will be set forth in part in the description which follows and, in part, will be obvious from the description, or may be learned by practice of the invention.
Drawings
The above and/or additional aspects and advantages of the present invention will become apparent and readily appreciated from the following description of the embodiments, taken in conjunction with the accompanying drawings of which:
FIG. 1 is a schematic diagram of a detection circuit module according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a first detection circuit of the detection circuit according to the embodiment of the invention;
FIG. 3 is a second exemplary schematic diagram of a detection circuit according to an embodiment of the present invention;
FIG. 4 is a schematic diagram of a main controller of a detection circuit according to an embodiment of the present invention;
FIG. 5 is a schematic diagram of an analog load detection unit of the detection circuit according to the embodiment of the invention;
FIG. 6 is a flowchart of a detection method according to an embodiment of the present invention.
Reference numerals:
the wireless transmission module comprises a detection module 100, a power detection unit 110, an RCD detection unit 120, a simulated load detection unit 130, a line sequence detection unit 140, an insulation detection unit 150, a resistance detection unit 160, a main controller 200, a power supply module 300, a power supply module 310, a charging module 320, a memory 400, an auxiliary module 500, a wireless transmission module 600 and a display module 700.
Detailed Description
Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like or similar reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the accompanying drawings are illustrative only for the purpose of explaining the present invention, and are not to be construed as limiting the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship referred to in the description of the orientation, such as the upper, lower, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, the meaning of a plurality of means is one or more, the meaning of a plurality of means is two or more, and larger, smaller, larger, etc. are understood as excluding the number, and larger, smaller, inner, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless otherwise explicitly limited, terms such as arrangement, installation, connection and the like should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above terms in the present invention in combination with the specific contents of the technical solutions. The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Referring to fig. 1, in a first aspect of the embodiments of the present invention, a detection circuit is provided, including: the main controller 200 is used for connecting a zero line, a live line and a ground line of the line to be detected; the detection module 100, an output end of the detection module 100 is connected with the main controller 200, an input end of the detection module 100 is used for connecting a zero line, a live line and a ground line of a line to be detected, the detection module 100 comprises a power supply detection unit 110, an RCD detection unit 120, a line sequence detection unit 140, an insulation detection unit 150, a resistance value detection unit 160 and an analog load detection unit 130, the power supply detection unit 110 is used for respectively detecting voltage data between the zero line and the live line and between the zero line and the ground line of the line to be detected, the line sequence detection unit 140 is used for determining line sequence data of the live line, the ground line and the zero line, the resistance value detection unit 160 is used for detecting resistance value data of the live line, the ground line and the zero line of the line to be detected according to the line sequence data detected by the line sequence detection unit 140, the analog load detection unit 130 is used for detecting voltage drop data under various loads, and the insulation detection, The insulation values of the ground wire and the zero wire, and the RCD detection unit 120 is used for detecting the sensitivity and the trip time of the earth leakage protector.
Further, the detection circuit also comprises a power supply module 300 and a memory 400, wherein the power supply module 300 is connected with the main controller 200 and used for supplying power to the detection circuit; the memory 400 is connected with the detection module 100 and the main controller 200 respectively, and is used for storing detection data of the detection module 100, wherein the detection data comprises voltage data, line sequence data, resistance data, voltage drop data, an insulation value, and sensitivity and tripping time data of the earth leakage protector, and whether an electric leakage exists in a line to be detected is judged according to the insulation value, wherein the voltage data comprises a voltage value and a voltage frequency.
Specifically, the line sequence detection unit 140 may adopt two ways: on one hand, the line sequence of the live wire, the ground wire and the neutral wire can be determined according to the voltage data between the live wire and the neutral wire and the voltage data between the neutral wire and the ground wire detected by the power detection unit 110; on the other hand, the line sequence of the live line, the ground line and the zero line can be detected with the aid of the auxiliary module 500, that is, when the line to be detected is powered off, the auxiliary module 500 sends a signal to one line of the live line, the ground line or the zero line at one power interface, the main controller 200 receives a signal at the other power interface, and the line sequence of the live line, the ground line and the zero line at the power interface connected with the main controller 200 is determined according to the line receiving the signal.
In addition, the resistance value detecting unit 160 determines the resistance values of the live wire, the ground wire and the neutral wire in two ways: on one hand, the line sequence of the live wire, the ground wire and the zero wire can be determined according to the voltage data between the zero wire and the live wire, the voltage data between the zero wire and the ground wire and the current data in the line to be detected, which are detected by the power detection unit 110; on the other hand, the resistances of the live wire, the ground wire and the zero line can be detected with the aid of the auxiliary module 500, that is, when the line to be detected is powered off, the auxiliary module sends a signal to one of the live wire, the ground wire or the zero line at one power interface of 500, the main controller 200 receives the signal at the other power interface, and the resistances of the live wire, the ground wire and the zero line at the power interface connected with the main controller 200 are determined according to the voltage and current data of the received signal line.
The main controller 200 controls the detection module 100 to perform power detection, RCD detection, line sequence detection, insulation detection, resistance detection and analog load detection on the line to be detected, detect the safety of the electric line from multiple angles, and then store the detection result in the memory 400. Can carry out a comprehensive and comprehensive detection to with the electric wire way, need not switch equipment when carrying out different detections moreover, only need cooperation control between the circuit to accomplish, labour saving and time saving, detection efficiency is higher.
Referring to fig. 2 to 4, in particular, in the circuit of the main controller 200, the 25 th pin of the third chip U3 is provided with a POWER KEY interface POWER _ KEY for turning on or off the main controller 200. The 41 th pin of the third chip U3 is provided with an alarm interface for connecting with a buzzer alarm, and when the detected result is abnormal, the alarm will be sent out to remind the user of the abnormality of the power line. The 39 th pin of the third chip U3 is provided with a power automatic shutdown interface, and when the detection circuit is not used within a certain time, the power of the main controller 200 is automatically shut down, so as to avoid electric quantity waste. The 45 th pin and the 46 th pin of the third chip U3 are connected with the RCD detection circuit, the main controller 200 gives the RCD detection circuit a current signal of 10ma to 30ma, the RCD detection circuit comprises a photoelectric coupler, the photoelectric coupler is used for receiving a first current signal sent by the main controller 200, converting the first current signal into an optical signal, converting the optical signal into a second current signal, and finally transmitting the second current signal to a line to be detected so as to detect the sensitivity and the trip time of the leakage protector. If the sensitivity is too high, the normal operation of the power line is influenced, and if the sensitivity is too low, the leakage protector cannot play a protection role. And the 28 th pin and the 29 th pin of the third chip U3 are provided with analog load interfaces which are used for being connected with an analog load detection circuit, measuring the voltage change when different loads are simulated, and calculating the voltage drop percentage to judge whether the measurement meets the requirements.
In some embodiments of the present invention, the auxiliary module 500 is further included, the auxiliary module 500 is connected to one power interface of the line to be detected, the power interface includes output ends of a live wire, a ground wire and a neutral wire, the auxiliary module 500 is configured to send a signal to one power interface of the line to be detected when the line to be detected is powered off, and the main controller 200 is configured to receive the signal sent by the auxiliary module at another power interface to detect the line to be detected. Due to the difference of the distances between the transformer and the power circuit, the voltage of the live wire and the zero line and the voltage of the ground wire and the zero line can be influenced by current fluctuation when being tested, so that the accuracy of a detection result is influenced. And by utilizing the auxiliary module 500, different lines are respectively detected when the line to be detected is powered off, so that the influence of current fluctuation during testing can be avoided, and the accuracy of the detection result can be effectively improved.
In some embodiments of the present invention, the wireless transmission module 600 is further included, the wireless transmission module 600 is configured to connect the main controller 200 and an external terminal device, and the wireless transmission module 600 is configured to transmit wireless communication information between the detection circuit and the external terminal device. The wireless transmission module 600 can communicate with an external terminal device, and sends a detection result to the terminal device, so that a user can check the detection result in real time. Or receiving an operation instruction of the external terminal equipment to perform correlation detection. The operation is simple and convenient, and the detection result can be obtained in real time.
In some embodiments of the present invention, the RCD detecting unit 120 includes an RCD detecting circuit including a photo coupler for receiving the first current signal sent by the main controller 200, for converting the first current signal into an optical signal, for converting the optical signal into a second electrical signal, and for transmitting the second electrical signal to the line to be detected to detect the sensitivity and the trip time of the earth-leakage protector. When the RCD detection circuit receives a signal that the main controller 200 sends a small current, the sensitivity of the earth leakage protector can be detected. If the sensitivity is too high, the normal operation of the power line is influenced, and if the sensitivity is too low, the leakage protector cannot play a protection role. When the RCD detection circuit receives the great current that main control unit 200 sent, earth-leakage protector's reaction time is trip time promptly, and trip time overlength can make earth-leakage protector can't play the effect at the very first time of electric leakage, causes serious threat to the human and property.
Referring to fig. 2 and 3, in some embodiments of the present invention, the RCD detection circuit includes a first detection circuit and a second detection circuit, the first detection circuit includes a first chip U1, a first resistor R1, a second resistor R2, and a third resistor R3, a first port of the first chip U1 is connected to one end of a first resistor R1, the other end of the first resistor R1 is connected to a first power source, a second port of the first chip U1 is connected to a 47 th pin of the main controller 200, a third port of the first chip U1 is connected to a ground line of a power line, a fourth port of the first chip U1 is connected to one ends of a second resistor R2 and a third resistor R3 connected in parallel, and the other ends of the second resistor R2 and the third resistor R3 are connected to a live line of the power line; the second detection circuit comprises a second chip U2, a fourth resistor R4, a fifth resistor R5 and a sixth resistor R6, a first port of the second chip U2 is connected with one end of the fourth resistor R4, the other end of the fourth resistor R4 is connected with a first power supply, a second port of the second chip U2 is connected with a 46 th pin of the main controller 200, a third port of the second chip U2 is connected with a ground wire of a power line, a fourth port of the second chip U2 is connected with one ends of the fifth resistor R5 and the sixth resistor R6 which are connected in parallel, and the other ends of the fifth resistor R5 and the sixth resistor R6 are connected with a live wire of the power line.
In some embodiments of the present invention, the analog load detecting unit 130 includes an analog load detecting circuit, the analog load detecting circuit includes a first bidirectional diode Q1, a second bidirectional diode Q2, and a seventh resistor R7, one end of the seventh resistor R7 is connected to the hot wire, the other end of the seventh resistor R7 is connected to the second port of the first bidirectional diode Q1 and the second port of the second bidirectional diode Q2, the first port of the first bidirectional diode Q1 is connected to the ground wire, the first port of the second bidirectional diode Q2 is connected to the neutral wire, the third port of the first bidirectional diode Q1 is connected to the 30 th pin of the main controller 200, and the third port of the second bidirectional diode Q2 is connected to the 29 th pin of the main controller 200.
In some embodiments of the present invention, the power module 300 includes a power module 310 and a charging module 320, the power module 310 is connected to the main controller 200, the charging module 320 is connected to the power module 310, the power module 310 is used for supplying power to the main controller 200, and the charging module 320 is used for charging the power module 310.
Specifically, the voltage conversion circuit converts the original voltage into a high voltage, and simulates the insulation state of the circuit to detect whether the circuit in the insulation state has electric leakage.
In some embodiments of the present invention, the present invention further comprises a display module 700, and the display module 700 is connected to the main controller 200 and the detection module 100, respectively, for displaying the detection data. The display module 700 is arranged to display the detection result of the detection circuit on the power line in real time, so that a user can check the detection result conveniently.
In a second aspect of the present invention, there is provided a detection apparatus, comprising a host, wherein the host comprises a housing, a power input end and the detection circuit of the first aspect of the present invention, wherein the power input end is used for connecting a power interface of an electric line, and the power interface comprises output ends of a live wire, a ground wire and a zero wire.
The detection module 100 is controlled by the main controller 200, and power detection, RCD detection, line sequence detection, insulation detection, resistance detection and analog load detection are performed on the power line, so that the safety of the power line is detected from multiple angles. This detection device can detect the safety of power consumption circuit from many angles, can carry out a synthesis and comprehensive detection to power consumption circuit, does not need switch equipment when carrying out different detections moreover, only needs the circuit to cooperate control to accomplish, labour saving and time saving, and detection efficiency is higher.
In some embodiments of the present invention, the auxiliary device further includes an auxiliary module 500, the auxiliary device is configured to be connected to one power interface of the line to be detected, the auxiliary device is configured to send a signal to the one power interface of the line to be detected when the circuit to be detected is powered off, and the host is configured to receive the signal sent by the auxiliary device at another power interface to detect the line to be detected. The auxiliary machine sends a signal to one power interface of the line to be detected when the line to be detected is powered off, and the main machine receives the signal sent by the auxiliary machine at the other power interface and detects the line to be detected according to the received signal. The interference of current fluctuation of a non-detection line can be effectively isolated, and the influence of the interference of the current fluctuation on the accuracy of a detection result is avoided. The accuracy of the calibration result can be effectively improved.
Referring to fig. 6, in a third aspect of the present invention, there is provided a detection method including:
s100, with the zero line as a reference point, respectively detecting voltage data between the live wire and the zero line and voltage data between the ground wire and the zero line;
s200, acquiring line sequence data of a live line, a zero line and a ground line;
s300, sending a current signal to a line to be detected, and acquiring the sensitivity and the tripping time of the leakage protector;
s400, cutting off power supply to all loads of the line to be detected, and obtaining insulation values of a live wire, a zero line and a ground wire;
s500, voltage drop data of the line to be detected after the line is connected to the analog load unit are obtained.
Through carrying out power detection, RCD to detect, line sequence detects, insulating detection, resistance detects and analog load detects with the electric wire way, detects the safety of electric wire way from many angles, can carry out a comprehensive and comprehensive detection to the electric wire way, detect comprehensively and the accuracy is high.
In some embodiments of the invention, further comprising the steps of:
s110, sending a signal to one power interface in a line to be detected through the auxiliary module 500, receiving the signal by the main controller 200 at the other power interface to detect the line to be detected, wherein the power interface comprises output ends of the live wire, the ground wire and the zero line;
and S500, receiving a detection instruction and outputting detection data.
The embodiments of the present invention have been described in detail with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge of those skilled in the art without departing from the gist of the present invention.
Referring to fig. 1 to 6, a detection circuit and a detection device according to an embodiment of the present invention are described in detail. It is to be understood that the following description is only exemplary, and not a specific limitation of the invention.
Referring to fig. 1 to 6, an embodiment of the present invention provides a detection circuit and a device, including: the main controller 200 is used for connecting a zero line, a live line and a ground line of the line to be detected; the detection module 100, an output end of the detection module 100 is connected with the main controller 200, an input end of the detection module 100 is used for connecting a zero line, a live line and a ground line of a line to be detected, the detection module 100 includes a power detection unit 110, an RCD detection unit 120, a line sequence detection unit 140, an insulation detection unit 150, a resistance value detection unit 160 and an analog load detection unit 130, the power detection unit 110 is used for respectively detecting voltage data between the zero line and the live line of the line to be detected and voltage data between the zero line and the ground line, the line sequence detection unit 140 is used for determining line sequence data of the live line, the zero line, the ground line and the zero line according to the voltage data between the zero line and the live line of the line to be detected by the power detection unit 110, and the resistance value detection unit 160 is used for detecting the live line, the live line and the ground line, The resistance data of the ground wire and the zero wire, the analog load detection unit 130 is used for detecting and simulating voltage drop under various loads according to the resistance data detected by the resistance detection unit 160, the insulation detection unit 150 is used for detecting the insulation value of the line to be detected in a power failure state, and the RCD detection unit 120 is used for detecting the sensitivity and tripping time of the earth leakage protector; the power supply module 300 is connected with the main controller 200, the power supply module 300 comprises a power supply module 310 and a charging module 320, the power supply module 310 is connected with the main controller 200, the charging module 320 is connected with the power supply module 310, the power supply module 310 is used for supplying power to the main controller 200, and the charging module 320 is used for charging the power supply module 310; the memory 400 is respectively connected with the detection module 100 and the main controller 200 and is used for storing detection data of the detection module 100, wherein the detection data comprises voltage data, line sequence data, resistance value data, voltage drop data, leakage state data and sensitivity and tripping time data of the leakage protector; the auxiliary module 500 is connected with one power interface in the line to be detected, the power interface comprises output ends of a live wire, a ground wire and a zero wire, the auxiliary module 500 is used for sending a signal to one power interface in the line to be detected when the line to be detected is powered off, and the main controller 200 is used for receiving the signal sent by the auxiliary module at the other power interface so as to detect the power-consuming line; the wireless transmission module 600, the wireless transmission module 600 is used for connecting the main controller 200 and the external terminal equipment, and the wireless transmission module 600 is used for transmitting the wireless communication information between the detection circuit and the external terminal equipment; and the display module 700, the display module 700 is connected with the main controller 200 and the detection module 100, and is used for displaying the detection data.
The specific using method comprises the following steps: inserting a power interface of the detection circuit into an interface of the power line, measuring the voltage between the live wire and the zero line and the voltage between the ground wire and the zero line by taking the zero line as a reference point, detecting the power voltage and the power frequency, and judging whether the line sequence is correct or not according to the measurement result data; the 45 th pin and the 46 th pin of the third chip U3 are connected with the RCD detection circuit, the main controller 200 firstly gives a current signal of 10ma to 30ma to the RCD detection circuit for detecting the sensitivity and the tripping time of the earth leakage protector; removing all loads of the power line when the power is cut off, and detecting whether the power line leaks electricity or not; measuring the voltage change of the power line before and after the power line is connected to the analog load unit, and calculating the voltage drop percentage to judge whether the quality of the power line meets the requirement; the auxiliary module 500 sends a signal to one power interface in the line to be detected at one power interface when the line to be detected is powered off, and the main controller 200 is used for receiving the signal sent by the auxiliary module at the other power interface so as to detect the power-using line; receiving a detection instruction sent by external terminal equipment, and sending detection data to the external terminal equipment; in the circuit of the main controller 200, a 25 th pin of the third chip U3 is provided with a POWER KEY interface POWER _ KEY for turning on or off the main controller 200. The 41 th pin of the third chip U3 is provided with an alarm interface for connecting with a buzzer alarm, and when the detected result is abnormal, the alarm will be sent out to remind the user of the abnormality of the power line. The 39 th pin of the third chip U3 is provided with a power automatic shutdown interface, and when the detection circuit is not used within a certain time, the power of the main controller 200 is automatically shut down, so as to avoid electric quantity waste. And the 28 th pin and the 29 th pin of the third chip U3 are provided with analog load interfaces which are used for being connected with an analog load detection circuit, measuring the voltage change when different loads are simulated, and calculating the voltage drop percentage to judge whether the measurement meets the requirements.
In the description herein, references to the description of the term "one embodiment," "some embodiments," "an illustrative embodiment," "an example," "a specific example," or "some examples" or the like mean that a particular feature, structure, material, or characteristic described in connection with the embodiment or example is included in at least one embodiment or example of the invention. In this specification, the schematic representations of the terms used above do not necessarily refer to the same embodiment or example. Furthermore, the particular features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.
While embodiments of the invention have been shown and described, it will be understood by those of ordinary skill in the art that: various changes, modifications, substitutions and alterations can be made to the embodiments without departing from the principles and spirit of the invention, the scope of which is defined by the claims and their equivalents.

Claims (10)

1. A detection circuit, comprising:
the main controller is used for connecting a zero line, a live line and a ground wire of the line to be detected;
the detection module comprises a power detection unit, an RCD detection unit, a line sequence detection unit, an insulation detection unit, a resistance detection unit and an analog load detection unit, wherein the power detection unit is used for respectively detecting voltage data between a zero line and a live line of the line to be detected and voltage data between the zero line and a ground line of the line to be detected, the line sequence detection unit is used for determining line sequence data of the live line, the ground line and the zero line, the resistance detection unit is used for detecting resistance data of the live line, the ground line and the zero line of the line to be detected according to the line sequence data detected by the line sequence detection unit, and the analog load detection unit is used for detecting voltage drop data under various loads, the insulation detection unit is used for detecting insulation values of the live wire, the ground wire and the zero wire in a power-off state, and the RCD detection unit is used for detecting sensitivity and tripping time of the leakage protector according to the leakage state.
2. The detection circuit according to claim 1, further comprising an auxiliary module, wherein the auxiliary module is connected to one power interface of the lines to be detected, the power interface includes output terminals of the live line, the ground line and the neutral line, the auxiliary module is configured to send a signal to one power interface of the lines to be detected, and the main controller is configured to receive a signal sent by the auxiliary module at another power interface.
3. The detection circuit according to claim 1, further comprising a wireless transmission module, wherein the wireless transmission module is configured to connect the main controller and an external terminal device, respectively, and the wireless transmission module is configured to transmit wireless communication information between the detection circuit and the external terminal device.
4. The detection circuit according to claim 1, further comprising a memory, wherein the memory is connected to the detection module and the main controller, respectively, and the memory is configured to store detection data of the detection module, and the detection data includes the voltage data, the line sequence data, the resistance value data, the voltage drop data, the insulation value, and sensitivity and trip time data of the earth leakage protector.
5. The detection circuit according to claim 1, wherein the RCD detection unit comprises an RCD detection circuit, and the RCD detection circuit comprises a photo coupler, the photo coupler is configured to receive a first current signal sent by the main controller, convert the first current signal into an optical signal, convert the optical signal into a second current signal, and transmit the second current signal to the line to be detected to detect the sensitivity and the trip time of the earth leakage protector.
6. The detection circuit of claim 1, further comprising a display module, wherein the display module is connected to the main controller and the detection module for displaying detection data.
7. A test device comprising a main unit including a housing, a power input and a test circuit according to any one of claims 1 to 6, wherein the power input is adapted to connect to a power interface of a power line, and the power interface includes outputs of the live, ground and neutral wires.
8. The detection device according to claim 7, further comprising an auxiliary machine, wherein the auxiliary machine includes an auxiliary module, the auxiliary machine is connected to one power interface of the line to be detected, the auxiliary machine is configured to send a signal to the one power interface of the line to be detected, and the main machine is configured to receive the signal sent by the auxiliary module at another power interface to detect the line to be detected.
9. A method of detection, comprising:
respectively detecting voltage data between the live wire and the zero line and voltage data between the ground wire and the zero line by taking the zero line as a reference point;
acquiring line sequence data of the live line, the zero line and the ground line;
sending a current signal to a line to be detected to acquire the sensitivity and the tripping time of the leakage protector;
disconnecting power supply to all loads of the line to be detected, and obtaining insulation values of the live wire, the zero line and the ground wire;
and acquiring voltage drop data of the line to be detected after the line is accessed to the analog load unit.
10. The detection method according to claim 9, further comprising:
sending a signal to one power interface in the line to be detected through the auxiliary module, receiving the signal at the other power interface by the main controller to detect the line to be detected, wherein the power interface comprises output ends of the live wire, the ground wire and the zero line;
and receiving a detection instruction and outputting detection data.
CN202011290737.3A 2020-11-18 2020-11-18 Detection circuit, device and method Pending CN112345886A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202011290737.3A CN112345886A (en) 2020-11-18 2020-11-18 Detection circuit, device and method

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202011290737.3A CN112345886A (en) 2020-11-18 2020-11-18 Detection circuit, device and method

Publications (1)

Publication Number Publication Date
CN112345886A true CN112345886A (en) 2021-02-09

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Family Applications (1)

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Country Status (1)

Country Link
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