CN213457325U - Socket detection device supporting abnormal detection of ground wire zero line - Google Patents
Socket detection device supporting abnormal detection of ground wire zero line Download PDFInfo
- Publication number
- CN213457325U CN213457325U CN202021192435.8U CN202021192435U CN213457325U CN 213457325 U CN213457325 U CN 213457325U CN 202021192435 U CN202021192435 U CN 202021192435U CN 213457325 U CN213457325 U CN 213457325U
- Authority
- CN
- China
- Prior art keywords
- circuit
- zero line
- ground wire
- connecting end
- test sub
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Landscapes
- Testing Of Short-Circuits, Discontinuities, Leakage, Or Incorrect Line Connections (AREA)
Abstract
The utility model discloses a support socket detection device of ground wire zero line anomaly detection, a serial communication port, include: the testing device comprises a micro control unit, a testing plug and a detection circuit, wherein the testing plug is provided with a live wire connecting end, a zero line connecting end and a ground wire connecting end; the detection circuit comprises a live wire test sub-circuit, a zero line test sub-circuit and a ground wire test sub-circuit which are respectively connected with the live wire connecting end, the zero line connecting end and the ground wire connecting end, and the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are sequentially connected to form a loop; an induction antenna is arranged corresponding to the live wire connecting end and is communicated with the first signal input end of the micro control unit. The utility model has the advantages of reasonable design ingenious, accomplish ground wire zero line anomaly detection automatically, realized to supply socket whether be in only the live wire, lack zero line, ground wire, or zero line and ground wire connect the detection of anti-state, filled market blank, all-round guarantee business personnel's life safety.
Description
Technical Field
The utility model relates to a supply socket detection area, concretely relates to support socket detection device of ground wire zero line anomaly detection.
Background
At present, 220V/50Hz power frequency electroscope, or power socket polarity detector and the like have the following seven states at most: firstly, the live wire, the zero line and the ground wire are correctly wired; second, lack the zero line; thirdly, a ground wire is cut; fourthly, lacking a live wire; fifthly, connecting the live wire and the ground wire reversely; sixthly, connecting the live wire and the zero line reversely; seventhly, the live wire and the ground wire are reversely connected, and the ground wire is not connected. However, there are two important states that no enterprise can make a product that can be realized, one is only a live wire, a zero wire and a ground wire; and secondly, the zero line and the ground wire are reversely connected. The existing product tie is not effective in the detection of the two states.
The omission of the two states is accompanied by great potential safety hazard; when the power socket is only provided with a live wire and lacks a zero line and a ground wire, the live wire still has electricity, and because the zero line and the ground wire are open-circuited, the current power socket polarity detector cannot be switched on, and cannot detect the state, so that a user mistakenly thinks that the socket is dead, the socket can be safely operated and is very dangerous, and the socket is possibly shocked by electricity; when the zero line and the ground wire of the power socket are reversely connected, because the power socket can be normally connected, the alarm indication of the current power socket polarity detector during detection is the same as the alarm indication of the power socket during normal detection, and the state can not be identified; and the harm brought by the device is that firstly, the accessed device can not operate, and secondly, the shell of the device can also cause electric shock accidents.
Furthermore, it is important to detect whether the power socket is in a state of only live wire, zero wire lack, ground wire or reverse connection between the zero wire and the ground wire, and the two states can be summarized as abnormal of the ground wire and the zero wire. Furthermore, a socket detection device supporting the abnormal detection of the ground wire zero line is urgently needed in the market to fill the blank in the aspect and ensure the life safety of operators.
SUMMERY OF THE UTILITY MODEL
Make supply socket to have the technical problem of hidden danger unusually in order to overcome above-mentioned ground wire zero line, the utility model discloses a support socket detection device of ground wire zero line anomaly detection.
The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is:
a socket detection device supporting abnormal detection of a ground wire zero line is characterized by comprising: the testing device comprises a micro control unit, a testing plug and a detection circuit, wherein the testing plug is provided with a live wire connecting end, a zero line connecting end and a ground wire connecting end;
the detection circuit comprises a live wire test sub-circuit, a zero line test sub-circuit and a ground wire test sub-circuit which are respectively connected with the live wire connecting end, the zero line connecting end and the ground wire connecting end, and the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are sequentially connected to form a loop;
an induction antenna is arranged corresponding to the live wire connecting end, and the induction antenna is communicated with the first signal input end of the micro control unit.
Preferably, the live wire test sub-circuit comprises a first light emitting diode, a first protection resistor and a first rectifying diode which are sequentially connected in series, wherein the anode of the first light emitting diode is connected with the live wire connecting end, and the cathode of the first rectifying diode is connected with the ground wire test sub-circuit;
the zero line test sub-circuit comprises a second rectifier diode, a second light emitting diode and a second protection resistor which are sequentially connected in series, wherein the anode of the second rectifier diode is connected with the zero line connecting end, and the input end of the first light emitting diode is also connected with the output end of the second protection resistor;
the ground wire test sub-circuit comprises a third light emitting diode, a third protection resistor and a third rectifier diode which are sequentially connected in series, wherein the negative electrode of the third rectifier diode is connected with the ground wire connecting end, and the positive electrode of the second rectifier diode is also connected with the positive electrode of the third light emitting diode.
Preferably, the resistances of the live wire test sub-circuit, the zero wire test sub-circuit and the ground wire test sub-circuit are the same.
Preferably, the induction antenna is connected with a first signal input end of the micro control unit through a fourth protection resistor;
and the input end of the fourth protection resistor is also connected with a grounded signal attenuation resistor.
Preferably, a first signal output end of the micro control unit is connected with a zero line ground wire open circuit indicator lamp;
and a second signal output end of the micro control unit is connected with a zero line ground wire reverse connection indicating lamp.
Preferably, the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are respectively connected with the live wire connecting end, the zero line connecting end and the ground wire connecting end through a first MOS transistor switch, a second MOS transistor switch and a third MOS transistor switch;
the grid electrodes of the first MOS tube switch, the second MOS tube switch and the third MOS tube switch are respectively connected with the first control output end, the second control output end and the third control output end of the micro control unit.
Preferably, the detection circuit further comprises a hall sensor arranged corresponding to the detection circuit, and the hall sensor is connected with a second signal input end of the micro control unit;
and the induction antenna is also connected with an analog-to-digital converter, and the analog-to-digital converter is connected with a first signal input end of the micro control unit.
Preferably, the testing device further comprises an insulating shell, wherein the insulating shell is internally provided with a first circuit accommodating cavity, a second circuit accommodating cavity and a third circuit accommodating cavity which are independent, and the fire wire testing sub-circuit, the zero line testing sub-circuit and the ground wire testing sub-circuit are respectively arranged in the first circuit accommodating cavity, the second circuit accommodating cavity and the third circuit accommodating cavity and are connected with the fire wire connecting end, the zero line connecting end and the ground wire connecting end.
Preferably, the first circuit accommodating cavity, the second circuit accommodating cavity and the third circuit accommodating cavity are respectively provided with a first antenna guide groove for the induction antenna to slide; a second antenna guide groove for the induction antenna to slide is formed in the live wire connecting end of the test plug;
preferably, a knob is arranged corresponding to the first circuit accommodating cavity, the second circuit accommodating cavity and the third circuit accommodating cavity, the knob is provided with at least four gears corresponding to the second antenna guide groove and the three first antenna guide grooves, and the induction antenna is connected with the knob through a telescopic mechanism;
the knob is driven to rotate through a steering driving device, the telescopic mechanism is driven to do telescopic motion through a telescopic driving mechanism, and the steering driving device and the telescopic driving mechanism are respectively connected to a third signal output end and a fourth signal output end of the micro control unit.
The utility model has the advantages that: the utility model has reasonable and ingenious structural design, automatically completes the abnormal detection of the ground wire and the zero line by supporting the detection device of the abnormal detection socket of the ground wire and the zero line, realizes the detection of whether the power socket is in the state of only live wire, zero line lack and ground wire or reverse connection of the zero line and the ground wire, and is simultaneously suitable for the national standard 220V/50HZ system and the power system of 110V such as America/Japan; except that 7 kinds of power socket states that can be detected at most by the current socket detection device can be realized, the detection of the abnormal state of the ground wire zero line of the power socket is supported, the market blank is filled, and the life safety of the personnel is guaranteed in all directions.
The present invention will be further described with reference to the accompanying drawings and the following detailed description.
Drawings
Fig. 1 is a schematic circuit diagram of a socket detection device supporting abnormal detection of a ground wire zero line in an embodiment of the present invention.
Detailed Description
Referring to fig. 1, the socket detection device supporting abnormal detection of the zero line of the ground wire provided in this embodiment includes: the testing device comprises a micro control unit, a testing plug and a detection circuit, wherein the testing plug is provided with a live wire connecting end, a zero line connecting end and a ground wire connecting end; and an induction antenna is arranged at the end of the fire wire corresponding to the tested power socket and is communicated with the first signal input end of the micro control unit. In this embodiment, the induction antenna corresponds to the live wire connection end.
Specifically, the live wire connecting end, the zero line connecting end and the ground wire connecting end are made of electrified materials, and when the detection is carried out, the live wire connecting end, the zero line connecting end and the ground wire connecting end are respectively inserted into a live wire hole, a zero line hole and a ground wire hole of the power socket to be detected, so that the detection circuit is connected with the live wire, the zero line and the ground wire of the power socket to be detected, and the correct wiring of the live wire, the zero line and the ground wire is realized; a zero line is absent; a ground wire is cut; lack of firing line; the live wire and the ground wire are reversely connected; the live wire and the zero line are reversely connected; the live wire and the ground wire are reversely connected and lack the ground wire; detecting and judging the 7 conditions;
in addition, through the arrangement of the induction antenna and the micro control unit, the zero line and the ground wire of the power socket to be detected are determined in a mode that the detection circuit cannot be conducted when being connected with the power socket to be detected and the induction antenna is used for obtaining the voltage value which can be acquired only when the live wire is connected; and then, determining whether the zero line and the ground wire of the tested power socket are reversely connected or not by comparing the voltage values measured by the induction antenna when the tested circuit is respectively connected with the live wire, the zero line/the live wire and the ground wire of the tested power socket. The socket detection device can detect whether the power socket is in a state of only live wire, zero wire lack, ground wire or reverse connection of the zero wire and the ground wire, namely, the socket detection device can detect the abnormity of the zero wire of the ground wire. Furthermore, the socket detection device can detect 7 power socket states at most by the conventional socket detection device, also can simultaneously support the detection of the abnormal state of the zero line of the ground wire of the power socket, fills the market blank and ensures the life safety of the personnel in all directions.
The detection circuit comprises a live wire test sub-circuit, a zero line test sub-circuit and a ground wire test sub-circuit which are respectively connected with the live wire connecting end, the zero line connecting end and the ground wire connecting end, and the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are sequentially connected to form a loop.
Specifically, the shapes of the live wire connecting end, the zero line connecting end and the ground wire connecting end are long strips.
Furthermore, the socket detection device supporting the abnormal detection of the ground wire zero line also comprises an insulating shell, wherein an independent first circuit accommodating cavity, a second circuit accommodating cavity and a third circuit accommodating cavity are arranged in the insulating shell, and the fire wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are respectively arranged in the first circuit accommodating cavity, the second circuit accommodating cavity and the third circuit accommodating cavity and are connected with the fire wire connecting end, the zero line connecting end and the ground wire connecting end;
first antenna guide grooves for the induction antenna to slide are formed in the first circuit accommodating cavity, the second circuit accommodating cavity and the third circuit accommodating cavity; a second antenna guide groove for the induction antenna to slide is formed in the live wire connecting end of the test plug;
a knob is arranged corresponding to the first circuit accommodating cavity, the second circuit accommodating cavity and the third circuit accommodating cavity, the knob is provided with at least four gears corresponding to the second antenna guide groove and the three first antenna guide grooves, and the induction antenna is connected with the knob through a telescopic mechanism;
the knob is driven to rotate through a steering driving device, the telescopic mechanism is driven to do telescopic motion through a telescopic driving mechanism, and the steering driving device and the telescopic driving mechanism are respectively connected to a third signal output end and a fourth signal output end of the micro control unit.
Specifically, in the present embodiment, the telescopic mechanism is a common piston rod, the telescopic driving mechanism is a telescopic cylinder, and the steering driving device is a steering cylinder.
Furthermore, the induction antenna can drive the induction antenna to move to the first antenna guide groove or the second antenna guide groove through the matching of the knob and the telescopic mechanism according to the control signal sent by the micro control unit, so that the subsequent ground wire zero line abnormity detection method can be implemented.
The micro control unit is powered by a 3V power supply IC.
In addition, the induction antenna and the live wire end of the tested power socket have at least an electrical gap larger than 1mm, and can resist an electric field signal of a live wire of 1KV, so that potential safety hazards during measurement caused by overlarge electric field signal of the live wire are avoided. In this embodiment, the inductive antenna is wrapped by an insulating antenna housing to achieve the above-mentioned electrical gap of at least greater than 1 mm.
The live wire test sub-circuit comprises a first light emitting diode, a first protection resistor and a first rectifier diode which are sequentially connected in series, wherein the anode of the first light emitting diode is connected with the live wire connecting end, and the cathode of the first rectifier diode is connected with the ground wire test sub-circuit; the zero line test sub-circuit comprises a second rectifier diode, a second light emitting diode and a second protection resistor which are sequentially connected in series, wherein the anode of the second rectifier diode is connected with the zero line connecting end, and the input end of the first light emitting diode is also connected with the output end of the second protection resistor; the ground wire test sub-circuit comprises a third light emitting diode, a third protection resistor and a third rectifier diode which are sequentially connected in series, wherein the negative electrode of the third rectifier diode is connected with the ground wire connecting end, and the positive electrode of the second rectifier diode is also connected with the positive electrode of the third light emitting diode. The condition that the normal state and the state of lacking the ground wire are displayed to be the same can be effectively avoided.
Specifically, the resistance values of the first protection resistor, the second protection resistor and the third protection resistor are 90 kilo-ohms.
During detection, if the connection of the live wire, the zero line and the ground wire is correct, the live wire test sub-circuit and the zero line test sub-circuit are conducted when the alternating current is in the positive half cycle, and the first light emitting diode and the second light emitting diode are lightened;
if no zero line exists, only the live wire has voltage to the ground wire, the live wire test sub-circuit is conducted when the alternating current is in the positive half cycle, the first light-emitting diode is lightened, at the moment, the zero line test sub-circuit and the ground wire test sub-circuit are equivalently connected in series and then connected to the live wire and the ground wire, but the effective resistance is doubled because the second light-emitting diode and the third light-emitting diode are connected in series, so that the second light-emitting diode and the third light-emitting diode are weak in light emission and can hardly see the light;
if the ground wire is not available, only the live wire has voltage to the zero wire, the zero wire test sub-circuit is conducted when the alternating current is in a negative half cycle, and the second light-emitting diode is lightened;
if the live wire is short, the voltage of the live wire to the zero line and the ground wire is 0, the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are all disconnected, and the first light-emitting diode and the second light-emitting diode are not lightened;
if the live wire and the ground wire are reversely connected, the live wire test sub-circuit and the ground wire connection sub-circuit are conducted in the negative half cycle of the alternating current, and the first light-emitting diode and the third light-emitting diode are lightened;
if the live wire and the zero wire are reversely connected, the zero wire test sub-circuit and the ground wire test sub-circuit are conducted in the positive half cycle of the alternating current, and the second light-emitting diode and the third light-emitting diode are lightened;
if the live wire and the ground wire are reversely connected and lack of the ground wire, the ground wire test sub-circuit is conducted when the alternating current is in a negative half cycle, and the third light-emitting diode is lightened.
And the resistances of the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are the same.
Specifically, the resistances of the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are the same, so that the electric fields generated by the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are the same when the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are connected with the same voltage. So that the interference of different electric fields caused by different resistance values is reduced when the detection of the reverse connection state of the zero line and the ground wire is implemented subsequently, and the detection precision is improved.
The induction antenna is connected with a first signal input end of the micro control unit through a fourth protection resistor; and the input end of the fourth protection resistor is also connected with a grounded signal attenuation resistor.
Specifically, the resistance value of the grounded signal attenuation resistor is 50 megaohms, so that the measurement antenna is prevented from being in a suspension state, and the defect that the measurement antenna is easy to interfere in the suspension state to cause unstable functional state is overcome. And then improve this socket detection device's measurement stability effectively.
A first signal output end of the micro control unit is connected with a zero line ground wire open circuit indicator lamp; and a second signal output end of the micro control unit is connected with a zero line ground wire reverse connection indicating lamp.
Specifically, when the zero line ground wire is determined to be in an open circuit, the micro control unit controls the zero line ground wire open circuit indicator lamp to be turned on, and when the zero line ground wire is determined to be in a reverse connection, the micro control unit controls the zero line ground wire reverse connection indicator lamp to be turned on;
the micro control unit can be a chip with logic operation function, control function and storage function, such as a single chip microcomputer and a cpu.
The live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are respectively connected with the live wire connecting end, the zero line connecting end and the ground wire connecting end through a first MOS tube switch, a second MOS tube switch and a third MOS tube switch; the grid electrodes of the first MOS tube switch, the second MOS tube switch and the third MOS tube switch are respectively connected with the first control output end, the second control output end and the third control output end of the micro control unit.
The Hall sensor is arranged corresponding to the detection circuit and is connected with a second signal input end of the micro control unit; and the induction antenna is also connected with an analog-to-digital converter, and the analog-to-digital converter is connected with a first signal input end of the micro control unit.
Specifically, the adc may be embedded in the mcu, or directly adopt the mcu with an adc function.
A ground wire zero line abnormity detection method implemented according to the socket detection device supporting ground wire zero line abnormity detection comprises the following steps:
presetting a preliminary value, sampling a test environment by an induction antenna, converting by an analog-to-digital converter to obtain a self-checking AD preliminary value, and adding the self-checking AD preliminary value and the preliminary value to obtain a preset threshold;
specifically, the AD value refers to ADC conversion, and is a sampling value of an analog-to-digital converter. Specifically, in this embodiment, the self-test AD initial value is a sampling value obtained by the power polarity detector during the power-on self-test, and compared with the subsequent restart of ADC sampling, firstly, energy is saved, and secondly, efficiency is improved;
the initial value is 90V, on one hand, the effective voltage value of the existing power socket specification during power-on is at least 110V, and meanwhile, the measured value of the induction antenna is the instantaneous voltage and the measurement error of the induction antenna is considered, the initial value is 90V, and the power socket can be simultaneously suitable for the detection of a national standard 220V power socket and a 110V power system such as the United states/Japan and the like;
moreover, by the method for obtaining the self-checking AD initial value, electric field interference in the environment is eliminated, the measurement stability of the method is further improved, and the detection accuracy is improved;
inserting a test plug of a power polarity detector into a tested power socket, acquiring a current value of a detection circuit through a Hall sensor, and judging whether the current value is greater than a preset current or not; the preset current is a current value of the test circuit when the test circuit is not electrified, and is generally 0A;
if the current value is less than or equal to the preset current, the induction antenna samples the live wire end of the tested power socket, and voltage information is obtained after conversion of the live wire end of the tested power socket by the analog-to-digital converter;
and when the voltage information is larger than a preset threshold, determining that the zero line and the ground line of the power socket to be tested are in an open circuit, and lighting the zero line and ground line open circuit indicator lamp.
When judging whether the current value is larger than the preset current, the method further comprises the following steps:
if the current value is larger than the preset current, controlling the first MOS tube switch and the third MOS tube switch to be closed, sampling the live wire quantum measurement circuit through the induction antenna, and obtaining a first comparison voltage after conversion through the analog-to-digital converter;
controlling a second MOS tube switch to be closed and a third MOS tube switch to be opened, sampling the zero line measurement quantum circuit through the induction antenna, and obtaining a second comparison voltage after conversion through the analog-to-digital converter;
and when the second comparison voltage is greater than the first comparison voltage, determining that the zero line and the ground line of the power socket to be tested are reversely connected, and lighting the indicating lamp for indicating that the zero line and the ground line are reversely connected.
Specifically, the potential on the ground wire of the power socket is always 0, although the zero line is grounded, the potential at the zero line end in practical application is not completely 0 due to various reasons such as moisture, distance and the like, and the larger the potential difference is, the larger the measured voltage is; and because the potential on the live wire is constant, the voltage between the live wire end and the ground wire end of the tested power socket is always larger than the voltage between the live wire end and the zero wire end. Further, the conclusion that the first comparison voltage is necessarily larger than the second comparison voltage under the normal condition can be obtained; therefore, when the second comparison voltage is larger than the first comparison voltage, it can be determined that the zero line and the ground line of the power socket to be detected are reversely connected.
Further, before judging whether the zero line and the ground wire of the power socket to be tested are reversely connected, it is also required to determine that the power socket to be tested is connected with a live wire, and the live wire is connected to a correct position; specifically, in this embodiment, that is, when the current state information is greater than the preset current, the following steps are also performed:
driving the detection circuit to disconnect the connection with the live wire end, the zero line end and the ground wire end of the tested power socket, and receiving a first live wire end voltage obtained from an induction antenna, wherein the first live wire end voltage is an induction voltage measured when the induction antenna is close to the live wire end of the tested power socket;
and judging whether the voltage of the first live wire terminal is greater than a preset voltage, wherein the preset voltage is 90V.
Furthermore, whether the power socket to be tested is connected with the live wire or not is achieved, and the live wire is connected to the correct position.
The method is matched with the socket detection device to automatically finish the abnormal detection of the zero line of the ground wire, realize the detection of whether the power socket is in the state of only a live wire, a zero line lack, the ground wire or the reverse connection of the zero line and the ground wire, and is simultaneously suitable for the national standard 220V/50HZ system and the power system of 110V such as America/Japan; electric field interference in the environment is eliminated by a mode of obtaining a self-checking AD initial value, and the measurement stability and the detection accuracy of the method are improved.
From the perspective of a micro control unit, during measurement, a self-checking instruction is sent, no-load operation of an induction antenna and the like is performed, a test environment is sampled, a self-checking AD initial value is obtained after conversion of an analog-to-digital converter, and a preset threshold is calculated according to the preset threshold, namely the self-checking AD initial value plus a payment initial value (90V);
inserting a test plug of the socket detection device into a tested power socket, acquiring circuit state information through a Hall sensor, and judging whether the current state information is larger than a preset current or not; when the current state information is less than or equal to the preset current, determining that a detection circuit of the power polarity detector is not electrified, namely that the detected power socket does not form a loop through the power polarity detector, and at the moment, the situation that the detected power socket lacks a live wire or lacks a zero line or a ground wire may occur;
through the matching of the knob and the telescopic mechanism, the induction antenna is driven to move to the second antenna guide groove, the induction antenna is pushed into the live wire connecting end of the test plug, and voltage information corresponding to the live wire end of the tested power socket is received; judging whether the voltage information is larger than the calculated preset threshold or not;
when the voltage information is larger than the calculated preset threshold, generating a first alarm signal, and driving a zero line ground wire open circuit indicator lamp to be turned on through a first signal output end;
when judging whether the current state information is larger than the preset current or not, if so, outputting third control information to control the first MOS tube switch, the second MOS tube switch and the third MOS tube switch to be disconnected, so that the detection circuit is disconnected with the live wire end, the zero wire end and the ground wire end of the tested power socket;
through the cooperation of the knob and the telescopic mechanism, the induction antenna is driven to move to the second antenna guide groove to receive the voltage of the first live wire; further judging whether the voltage of the first live wire terminal is greater than a preset voltage (90V) or not, so as to judge whether the power socket to be detected is connected with a live wire or not and whether the live wire is connected to a correct position or not;
when the voltage of the first live wire terminal is greater than a preset voltage, implementing judgment on whether a zero line and a ground wire of the power socket to be tested are reversely connected or not: outputting fourth control information to control the first switch and the third switch to be closed, so that the detection circuit is restored to be connected with the live wire end and the ground wire end of the power socket; then, through the matching of the knob and the telescopic mechanism, the induction antenna is driven to move into the first antenna guide groove of the first circuit accommodating cavity, so that the induction antenna is close to the fire wire measuring sub-circuit, and the induction antenna acquires voltage information through an electric field of the fire wire measuring sub-circuit at the moment to serve as first comparison voltage; thirdly, receiving a first comparison voltage acquired from the induction antenna and temporarily registering;
further, fifth control information is output, the second switch is controlled to be closed, and the third switch is switched off, so that the detection circuit is restored to be connected with the zero line end of the power socket and is disconnected with the ground wire end of the tested power socket; then, through the cooperation of the knob and the telescopic mechanism, the induction antenna is driven to move into the first antenna guide groove of the second circuit accommodating cavity, so that the induction antenna is close to the zero line measuring sub-circuit, and the induction antenna acquires voltage information as a second comparison voltage through an electric field of the zero line measuring sub-circuit; thirdly, receiving a second comparison voltage acquired from the induction antenna and temporarily registering;
and judging whether the second comparison voltage is greater than the first comparison voltage, generating a second alarm signal when the second comparison voltage is greater than the first comparison voltage, and driving a zero line ground wire reverse connection indicator lamp to light through a second signal output end.
When receiving the voltage information corresponding to the live wire end of the tested power socket, the filtering process is required to be implemented: the induction antenna collects ten continuous instantaneous voltages of the live wire end of the tested power socket, and the instantaneous voltages are used as sine period information; calculating the average value of the remaining 8 sinusoidal cycle information after removing the maximum value and the minimum value in ten continuous sinusoidal cycle information, taking the average value as the voltage information, and then judging whether the voltage information is greater than the calculated preset threshold to realize the filtering function; meanwhile, the filtering process is also suitable for collecting the first comparison voltage and the second comparison voltage.
In addition, the filtering process may also be one, the maximum deviation value allowed by two times of sensing antenna sampling is determined (set as a), and the judgment is made each time a new sampling value is detected: if the difference between the current value and the previous value is less than or equal to A, the current value is valid; if the difference between the current value and the previous value is greater than A, the current value is invalid, and the previous value is used for replacing the current value. And taking the current value as the voltage information. The method has the advantages that the pulse interference caused by accidental factors can be effectively overcome; continuously taking N induction antenna sampling values (N is an odd number), arranging the N sampling values according to the size, and taking the intermediate value as the voltage information; and thirdly, generating a queue according to the sampling values of the continuous N induction antennas, wherein the length of the queue is fixed to N, sampling a new data through the induction antennas each time, putting the new data into the tail of the queue, throwing away a data at the head of the original queue, and carrying out arithmetic average operation on the N data in the queue to obtain the operation value as the voltage information. The method has the advantages of good inhibition effect on external interference and high smoothness.
The utility model has reasonable and ingenious structural design, automatically completes the abnormal detection of the ground wire and the zero line by supporting the detection device of the abnormal detection socket of the ground wire and the zero line, realizes the detection of whether the power socket is in the state of only live wire, zero line lack and ground wire or reverse connection of the zero line and the ground wire, and is simultaneously suitable for the national standard 220V/50HZ system and the power system of 110V such as America/Japan; except that 7 kinds of power socket states that can be detected at most by the current socket detection device can be realized, the detection of the abnormal state of the ground wire zero line of the power socket is supported, the market blank is filled, and the life safety of the personnel is guaranteed in all directions.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. The technical solution of the present invention can be used by anyone skilled in the art to make many possible variations and modifications, or to modify the technical solution of the present invention to equivalent embodiments with equivalent variations, without departing from the scope of the technical solution of the present invention. Therefore, the equivalent changes made according to the shape, structure and principle of the present invention should be covered in the protection scope of the present invention.
Claims (10)
1. A socket detection device supporting abnormal detection of a ground wire zero line is characterized by comprising: the testing device comprises a micro control unit, a testing plug and a detection circuit, wherein the testing plug is provided with a live wire connecting end, a zero line connecting end and a ground wire connecting end;
the detection circuit comprises a live wire test sub-circuit, a zero line test sub-circuit and a ground wire test sub-circuit which are respectively connected with the live wire connecting end, the zero line connecting end and the ground wire connecting end, and the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are sequentially connected to form a loop;
an induction antenna is arranged corresponding to the live wire connecting end, and the induction antenna is communicated with the first signal input end of the micro control unit.
2. The socket detection device supporting the abnormal detection of the ground wire and zero line of claim 1, wherein the live wire test sub-circuit comprises a first light emitting diode, a first protection resistor and a first rectifying diode which are sequentially connected in series, wherein the anode of the first light emitting diode is connected with the live wire connecting end, and the cathode of the first rectifying diode is connected with the ground wire test sub-circuit;
the zero line test sub-circuit comprises a second rectifier diode, a second light emitting diode and a second protection resistor which are sequentially connected in series, wherein the anode of the second rectifier diode is connected with the zero line connecting end, and the input end of the first light emitting diode is also connected with the output end of the second protection resistor;
the ground wire test sub-circuit comprises a third light emitting diode, a third protection resistor and a third rectifier diode which are sequentially connected in series, wherein the negative electrode of the third rectifier diode is connected with the ground wire connecting end, and the positive electrode of the second rectifier diode is also connected with the positive electrode of the third light emitting diode.
3. The apparatus of claim 1, wherein the live test sub-circuit, the neutral test sub-circuit, and the ground test sub-circuit have the same resistance.
4. The apparatus of claim 1, wherein the sensing antenna is connected to the first signal input of the micro control unit via a fourth protection resistor;
and the input end of the fourth protection resistor is also connected with a grounded signal attenuation resistor.
5. The socket detection device supporting the abnormal detection of the ground wire and the zero line according to claim 1, wherein a first signal output end of the micro control unit is connected with a zero line and ground wire open circuit indicator lamp;
and a second signal output end of the micro control unit is connected with a zero line ground wire reverse connection indicating lamp.
6. The socket detection device supporting the abnormal detection of the ground wire and the zero line according to claim 1, wherein the live wire test sub-circuit, the zero line test sub-circuit and the ground wire test sub-circuit are respectively connected with the live wire connecting end, the zero line connecting end and the ground wire connecting end through a first MOS tube switch, a second MOS tube switch and a third MOS tube switch;
the grid electrodes of the first MOS tube switch, the second MOS tube switch and the third MOS tube switch are respectively connected with the first control output end, the second control output end and the third control output end of the micro control unit.
7. The socket detection device supporting the abnormal detection of the ground wire zero line according to claim 1, further comprising a hall sensor arranged corresponding to the detection circuit, wherein the hall sensor is connected with a second signal input end of the micro control unit;
and the induction antenna is also connected with an analog-to-digital converter, and the analog-to-digital converter is connected with a first signal input end of the micro control unit.
8. The socket testing device supporting the abnormal detection of the ground wire and the zero line according to claim 1, further comprising an insulating housing, wherein the insulating housing is provided with a first circuit accommodating cavity, a second circuit accommodating cavity and a third circuit accommodating cavity, which are independent, and the live wire testing sub-circuit, the zero line testing sub-circuit and the ground wire testing sub-circuit are respectively arranged in the first circuit accommodating cavity, the second circuit accommodating cavity and the third circuit accommodating cavity and connected with the live wire connecting end, the zero line connecting end and the ground wire connecting end.
9. The socket detection device supporting the abnormal detection of the ground wire and the zero line of the claim 8 is characterized in that the first circuit accommodating cavity, the second circuit accommodating cavity and the third circuit accommodating cavity are respectively provided with a first antenna guide groove for the induction antenna to slide; and a second antenna guide groove for the sliding of the induction antenna is arranged in the live wire connecting end of the test plug.
10. The socket detecting device supporting the abnormal detection of the ground wire zero line according to claim 9, wherein a knob is provided corresponding to the first circuit accommodating chamber, the second circuit accommodating chamber and the third circuit accommodating chamber, the knob is provided with at least four gears corresponding to the second antenna guide groove and three first antenna guide grooves, and the induction antenna is connected with the knob through a telescopic mechanism;
the knob is driven to rotate through a steering driving device, the telescopic mechanism is driven to do telescopic motion through a telescopic driving mechanism, and the steering driving device and the telescopic driving mechanism are respectively connected to a third signal output end and a fourth signal output end of the micro control unit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021192435.8U CN213457325U (en) | 2020-06-24 | 2020-06-24 | Socket detection device supporting abnormal detection of ground wire zero line |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021192435.8U CN213457325U (en) | 2020-06-24 | 2020-06-24 | Socket detection device supporting abnormal detection of ground wire zero line |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213457325U true CN213457325U (en) | 2021-06-15 |
Family
ID=76371313
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021192435.8U Active CN213457325U (en) | 2020-06-24 | 2020-06-24 | Socket detection device supporting abnormal detection of ground wire zero line |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN213457325U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115902705A (en) * | 2022-11-30 | 2023-04-04 | 国网山东省电力公司电力科学研究院 | Intelligent acquisition device, automatic detection system and method for secondary circuit of transformer substation |
-
2020
- 2020-06-24 CN CN202021192435.8U patent/CN213457325U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN115902705A (en) * | 2022-11-30 | 2023-04-04 | 国网山东省电力公司电力科学研究院 | Intelligent acquisition device, automatic detection system and method for secondary circuit of transformer substation |
| CN115902705B (en) * | 2022-11-30 | 2024-04-09 | 国网山东省电力公司电力科学研究院 | Intelligent acquisition device, automatic detection system and method for secondary circuit of transformer substation |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN111722150B (en) | Socket detection device and method supporting ground wire zero line abnormity detection | |
| CN105137161A (en) | Digital composite functional high-voltage electroscope | |
| CN111580019B (en) | Method, device and system for detecting abnormity of ground wire zero line and readable storage medium | |
| CN102998520B (en) | Digital display high-voltage electroscope of telescopic rod | |
| CN102243286B (en) | Apparatus for detecting and displaying grounding state of equipment or socket | |
| CN213457325U (en) | Socket detection device supporting abnormal detection of ground wire zero line | |
| CN111025006B (en) | Non-contact voltage detection and phase recognition device | |
| CN105652098A (en) | Ground resistance detection and analysis system adopting solar energy to supply power | |
| CN202631672U (en) | Portable detector for indicator with short-circuit and grounding fault | |
| CN107942190A (en) | Measuring equipment electrified automatic alarm formula device for detecting polarity | |
| CN202057749U (en) | Instrument for detecting and displaying ground state of equipment or socket | |
| CN110824263A (en) | Phase difference type multifunctional phase checking device | |
| CN206331066U (en) | A kind of overhead transmission line electric leakage addressing instrument | |
| CN204314369U (en) | There is the test pencil of voltage digital detection and temperature acquisition function | |
| CN210657142U (en) | Transformer substation grounding device cathodic protection potential detection system | |
| CN204086445U (en) | A kind of wire breakage detection device for cables | |
| CN203350346U (en) | Potential indicator with temperature measuring function | |
| CN108631394B (en) | Internal resistance detection sensor | |
| CN110656335A (en) | Transformer substation grounding device cathode protection potential detection system and detection method thereof | |
| CN105629075A (en) | Grounding resistance detection system with automatic detection function | |
| CN206399988U (en) | A kind of automobile specified electroprobe | |
| CN208795814U (en) | A kind of Novel electric area network safety detector | |
| CN219799718U (en) | Control cable detection device | |
| CN215894890U (en) | Sensor line detector and dynamic measuring device | |
| CN203444033U (en) | Locomotive direct power supply passenger train centralized control signal detector |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |