CN110632364A - A non-contact voltage detection device, plug structure and method - Google Patents

Abstract

The invention discloses a non-contact voltage detection device, comprising: the device comprises a shell, a signal prompt module arranged on the shell and a detection identification circuit arranged in the shell; an insulating protection seat is fixed at the front end of the shell, and a first plug and a second plug which are used for jacking the socket safety protection door and extending into the socket jack are arranged on the insulating protection seat; a first antenna is fixed in the first plug and is connected with the input end of the detection identification circuit; the signal prompt module is connected with the output end of the detection identification circuit. The invention also discloses a plug-in structure of the non-contact voltage detection device and the socket and a method for inserting the voltage detection device into the socket. The invention has reasonable and ingenious design, convenient detection, no need of self-checking, time and labor saving, can jack the safety protection door through the first plug and the second plug in a cooperative manner, ensures that the first antenna can be closer to a charged body in the socket, ensures the measurement accuracy, is also suitable for the socket without the safety protection door, and is easy to popularize.

Description

A non-contact voltage detection device, plug structure and method

technical field

The invention relates to the field of zero live wire detection, in particular to a non-contact voltage detection device, a plug-in structure and a method.

Background technique

With the development of the electronics industry, the types of sockets also tend to be diversified. Among them, the wiring of the zero and live wires of the two-hole socket is easy to confuse. Since the normal switch is to control the live wire, if the wiring is wrong, turning off the switch will only break the neutral wire, and the live wire is still powered. , it is easy to cause electric shock accidents; at the same time, some electrical appliances require that the connection of the zero and live wires cannot be reversed. Before use and during maintenance operations, it is often necessary to test the national standard two-hole socket.

At present, non-contact voltage detectable devices are all single-plug. After the promulgation of the new 3C compulsory certification, the new national standard sockets are equipped with safety protection doors. The safety protection door can only be opened by applying force; therefore, the single-plug voltage measuring device on the market cannot be inserted into the jack of the new national standard socket, and it is difficult to detect an effective voltage signal. It is necessary to use a special tool to open the safety protection door of the socket. The voltage is detected, this process is cumbersome, time-consuming and labor-intensive;

In addition, when using the voltage measuring device to detect the socket, the existing single-plug voltage measuring device needs to be inserted into the jack of the socket in turn to test the state of the induction signal of the two holes of the socket respectively, and artificially compare the effect of the indicating state to distinguish the state of the socket. Zero live wire; the detection efficiency is low, and when it is applied to the new national standard socket, the single-plug voltage measuring device needs special tools to open the safety protection door, which undoubtedly further increases the cumbersomeness of the operation;

Secondly, the detection device configured for the maintenance personnel must have a self-test function, which increases the cost. Otherwise, due to the failure of the single-plug voltage measuring device itself, there is no response reminder when it is inserted into the live wire hole, so that the operator mistakenly thinks that the hole connected is the zero line, causing serious safety hazards.

Contents of the invention

In order to solve the above problems, the invention discloses a non-contact voltage detection device, a plug structure and a method.

The technical scheme that the present invention adopts for realizing the above object is:

A non-contact voltage detection device, comprising: a housing, a signal prompt module disposed on the housing, and a detection and identification circuit disposed in the housing; an insulating protective seat is fixed at the front end of the housing, and the insulating The protective seat is provided with a first plug and a second plug for opening the safety protection door of the socket and extending into the socket jack; a first antenna is fixed in the first plug, and the first antenna is connected with the detection The input end of the identification circuit is connected; the signal prompt module is connected with the output end of the detection identification circuit.

The detection and identification circuit includes a first analog-to-digital converter and a micro-control unit connected in sequence; the first antenna is connected to the input of the first analog-to-digital converter, and the signal prompt module and the micro-control unit output connection.

A second antenna is fixed in the second plug; the signal conversion unit also includes a second analog-to-digital converter, and the second analog-to-digital converter is connected to the micro control unit; the second antenna is connected to the The input terminal of the second analog-to-digital converter.

The signal prompt module includes a live wire status indicator light and a neutral wire status indicator light; the live wire status indicator light and the neutral wire status indicator light are fixed on the housing and connected to the micro control unit.

The live wire status indicator light includes a first light-emitting diode, and the neutral line state light includes a second light-emitting diode; the first light-emitting diode and the second light-emitting diode are respectively connected to the first output of the micro control unit Terminal, the second output terminal.

The live wire status indicator light and the neutral line status indicator light also include a third light-emitting diode and a fourth light-emitting diode respectively; The four output terminals are connected; the first light-emitting diode and the second light-emitting diode are red light-emitting diodes, and the third light-emitting diode and the fourth light-emitting diode are green light-emitting diodes.

The signal prompt module also includes a buzzer arranged in the housing; the buzzer is connected to the third output terminal of the zero live wire detection and identification device through an NPN transistor; the emitter stage of the NPN transistor It is grounded, and its collector and base are respectively connected to the buzzer and the fifth output terminal of the micro control unit.

A plug-in structure between a non-contact voltage detection device and a socket, the socket includes a live wire end jack, a neutral wire end jack and sockets corresponding to the live wire end jack and the neutral wire end respectively arranged on the socket shell. The conductors connected to the live wire and the conductors connected to the neutral wire are set in the hole; a safety protection door is also provided corresponding to the jack of the live wire end and the jack of the neutral wire end; the safety protection door is opened by the first plug and the second plug together and respectively inserted into the live wire end jack and the neutral wire end jack; the first end of the first plug and the second plug are respectively close to the live wire conductor and the neutral wire conductor.

A depth limiting groove is provided on the insulating protection seat corresponding to the space between the first plug and the second plug.

A method for inserting a voltage detection device into a socket, comprising: an insulating protection seat drives the first plug and the second plug into the live wire end jack and the neutral wire end jack of the socket respectively, and the first plug and the second plug are inserted vertically applying forces together in the direction of the safety guard door to squeeze said safety guard door;

Push the first plug and the second plug in the direction of the depth limit groove and continue to insert to the limited position of the limit groove, so that the first end of the first plug and the second plug are respectively close to the conductor of the live line and the conductor of the neutral line.

The beneficial effects of the present invention are: the present invention has reasonable and ingenious design, convenient detection, no need for self-inspection, and the safety protection door can be pushed back through the cooperation of the first plug and the second plug, so that the first antenna can be closer to the charged body in the socket, ensuring Accurate measurement, without using other tools other than this device, the detection process for the new national standard socket is simple, time-saving and labor-saving; in addition, this device is also applicable to sockets without safety protection doors, which can meet the needs of customers , easy to popularize; moreover, through the setting of the second antenna, in cooperation with the first antenna, the measurement data of the live wire end and the neutral wire end of the socket can be detected at the same time, and the detection efficiency is improved.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

1 is a perspective view of a non-contact voltage detection device in an embodiment of the present invention;

Fig. 2 is a structural diagram of a detection and identification circuit in an embodiment of the present invention;

Fig. 3 is a diagram of the plugging state of the non-contact voltage detection device and the socket in the embodiment of the present invention;

Fig. 4 is a cross-sectional view of the plugged state of the non-contact voltage detection device and the socket in the embodiment of the present invention.

Detailed ways

Embodiment, refer to Fig. 1 to Fig. 4 A non-contact voltage detection device provided in this embodiment includes: a housing 1, a signal prompt module arranged on the housing 1 and a Detection and identification circuit; the front end of the housing 1 is fixed with an insulating protection seat 3, and the insulating protection seat 3 is provided with a first plug 31 and a second plug 32 for opening the socket safety protection door and extending into the socket jack ; A first antenna is fixed in the first plug 31, and the first antenna is connected to the input end of the detection and identification circuit; the signal prompt module is connected to the output end of the detection and identification circuit.

Specifically, the first plug 31 and the second plug 32 are independent of each other, and according to the opening principle of the safety protection door, the second plug 32 is provided so that during detection, the first plug 31 and the second plug 32 can be passed. Work together to open the safety protection door, so that the first antenna can be closer to the charged body in the socket, ensuring measurement accuracy, and without using other tools outside the device, the detection process for the new national standard socket is simple, time-saving and labor-saving; In addition, For sockets without a safety protection door, since the socket originally has two jacks, the device is also applicable, can meet the needs of customers, and is easy to popularize.

The detection and identification circuit includes a first analog-to-digital converter and a micro-control unit 2 connected in sequence; the first antenna is connected to the input of the first analog-to-digital converter, and the signal prompt module and the micro-controller The output of unit 2 is connected.

Specifically, the voltage signal detected by the first antenna is sent to the first analog-to-digital converter, and the voltage signal detected by the first antenna is converted to analog-to-digital by the first analog-to-digital converter, and then sent to the micro control unit 2; The control unit 2 prompts the module to make corresponding feedback according to the control signal of the input voltage signal.

A second antenna is fixed in the second plug 32; the signal conversion unit also includes a second analog-to-digital converter, and the second analog-to-digital converter is connected to the micro control unit 2; the second antenna is connected to to the input of the second ADC.

Specifically, through the setting of the second antenna, in conjunction with the first antenna, the measurement data of the live wire end and the neutral wire end of the socket can be detected at the same time. First, when detecting whether there is an abnormality in the socket, there is no need for a conventional voltage measuring device with only a single plug. At least two measurements are required to obtain the live and neutral signals; the second is to measure simultaneously through the first antenna and the second antenna, even if the user is negligent, if the device is not powered on or the power supply of the system fails If it is directly used for measurement under such circumstances, the device just cannot operate normally, and cannot give feedback to the user through the signal prompt module; it will not cause misleading to the user such as the open circuit of the socket due to no feedback, to a great extent Potential safety hazards are reduced. Therefore, compared with conventional electric measuring pens, this device does not need to be configured with a self-check function to ensure that maintenance personnel are not misled, and solves the potential safety hazards of conventional electric measuring pens.

Moreover, the device can obtain the voltage signals of the live wire end and the neutral wire end in one measurement, with high efficiency, and feedback is given through the signal prompt module, and the user obtains the measurement result according to the feedback, making the measurement process convenient and quick, saving time and effort.

The signal prompt module includes a live wire status indicator light 41 and a neutral wire status indicator light 42; connect.

The live wire status indicator light 41 includes a first light emitting diode, and the neutral line status indicator light 42 includes a second light emitting diode; the first light emitting diode and the second light emitting diode are respectively connected to the micro control unit 2 The first output terminal and the second output terminal.

The live wire state indicator light 41 and the zero line state indicator light 42 also include a third light emitting diode and a fourth light emitting diode respectively; terminal and the fourth output terminal; the first light-emitting diode and the second light-emitting diode are red light-emitting diodes, and the third light-emitting diode and the fourth light-emitting diode are green light-emitting diodes.

Specifically, through the setting of the first antenna and the second antenna, the left and right jacks of the socket can be measured at the same time, and then through the setting of the first analog-to-digital converter and the second analog-to-digital converter, the second analog-to-digital converter can be measured at the same time The measurement signals of the live wire end and the neutral wire end measured by the first antenna and the second antenna are simultaneously converted into digital signals and sent to the micro control unit 2, and the process does not interfere with each other, and the accuracy of the measurement results is guaranteed;

Wherein, the micro-control unit 2 is preset with a reference threshold, and when the first antenna measures a voltage signal higher than the reference threshold, the micro-control unit 2 judges that the measurement target of the first antenna is the live wire, and controls the first light-emitting diode If it is on, the live wire status indicator light 41 will be bright red;

When the second antenna measures a voltage signal higher than the reference threshold, the micro-control unit 2 judges that the measurement target of the second antenna is the live wire, and controls the second light-emitting diode to light up, and then the zero-line status indicator light 42 lights up red. ;

Maintenance personnel can further judge which end of the socket has dangerous voltage according to the state of the live wire status indicator light 41 and the neutral line status indicator light 42, and then determine whether the live wire is open circuit, whether the neutral line is open circuit, and whether the line connection is abnormal.

In addition, the reference threshold is set according to the voltage standards of different countries and regions, and is an accurate value. In a preferred embodiment, there are multiple reference thresholds preset, and the measurement at the live wire end obtained after conversion by the analog-to-digital converter Before measuring the signal at the signal and neutral terminals, first select the appropriate reference threshold according to the country and region where the staff is located; the setting principle of the reference threshold is: the national standard socket is equivalent to an alternating power supply, and an alternating electric field is formed around it, and the antenna is extended Into the alternating electric field, the corresponding alternating voltage can be induced; but at the same time, due to environmental factors, other interference such as non-test target electric fields, etc., produce misleading signals, but when testing, insert the antenna into the socket jack , protected by the socket shell, the interference signal can be minimized. Therefore, a reference threshold is set. When the test signal is smaller than the reference threshold, it is regarded as an interference signal. If the signal is not passed to the next step, it will not affect the subsequent judgment. ; If the reference threshold is not set and the interference signal is allowed to continue to be transmitted, it will interfere with subsequent judgments and cause serious security risks.

The signal prompt module also includes a buzzer arranged in the housing 1; the buzzer is connected to the third output end of the zero live wire detection and identification device through an NPN transistor; the NPN transistor The emitter stage is grounded, and its collector and base are respectively connected to the buzzer and the fifth output terminal of the microcontroller unit 2 .

As a preferred embodiment, the non-contact voltage detection device is provided with an intelligent gear, and a fluctuation threshold is preset in the control unit. When adjusted to this gear, the micro-control unit 2 obtains the The measurement signal of the live wire end and the measurement signal of the neutral wire end; when the measurement signal of the live wire end and the measurement signal of the neutral wire end are less than the reference threshold, it is determined that the live wire is open, and the buzzer is controlled to alarm. At this time, the first light-emitting diode, the second The light emitting diode, the third light emitting diode and the fourth light emitting diode are all off, and the live wire status indicator 41 and the neutral line status indicator 42 are all green;

When the measurement signal at the live line end and the measurement signal at the neutral line end are greater than the reference threshold, determine whether the absolute value of the difference between the measurement signal at the live line end and the measurement signal at the neutral line end is less than the fluctuation threshold;

If the absolute value of the difference between the live wire end measurement signal and the neutral wire end measurement signal is less than the fluctuation threshold, it is determined that the zero line is open, and the first light-emitting diode and the second light-emitting diode are controlled to light up, so that the live wire status indicator light 41 and the zero line status indication Lamp 42 is all bright red light, and drives the buzzer to report to the police;

If the absolute value of the difference between the live wire end measurement signal and the neutral wire end measurement signal is greater than the fluctuation threshold, compare the live wire end measurement signal and the neutral wire end measurement signal;

When the measurement signal at the live line end is greater than the measurement signal at the neutral line end, confirm that the line connection is normal; control the first light-emitting diode and the fourth light-emitting diode to light up, so that the live line status indicator 41 lights up in red, and the neutral line status indicator 42 lights up in green , the buzzer does not alarm;

When the measurement signal at the live line end is smaller than the measurement signal at the neutral line end, determine that the line connection is abnormal, control the second light-emitting diode and the third light-emitting diode to light up, so that the live line status indicator 41 lights up in green, and the neutral line status indicator 42 lights up in red. , and control the buzzer alarm.

Then when the user detects the socket by the device, he can know whether there is abnormality in the socket according to whether the buzzer alarms; Even non-professionals can easily distinguish whether the socket can be used normally, which improves the scope of application of this product and is easy to popularize;

Wherein, the fluctuation threshold is set according to the distance between the two holes of the socket, which is an accurate value. The smaller the distance between the holes, the closer the measurement signal at the neutral line end is to the measurement signal at the live line end when the neutral line is disconnected. The threshold is smaller.

In a preferred embodiment, the sixth output terminal of the micro control unit 2 is also connected to a display screen, and the user can also distinguish the abnormal types through the text displayed on the screen.

Specifically, the input terminals of the first analog-to-digital converter and the second analog-to-digital converter are connected with a first voltage-dividing resistor and a second voltage-dividing resistor with equal resistance; There are capacitors.

A plug-in structure between a non-contact voltage detection device and a socket. The socket 5 includes a live wire end jack, a neutral wire end jack, and a socket corresponding to the live wire end and the neutral wire end respectively. The jack is provided with a live wire conductor 51 and a neutral wire conductor 52; corresponding to the live wire end jack and the neutral wire end jack, a safety protection door 53 is also provided; the first plug 31 and the second plug 32 have a common Open the safety protection door 53 and insert them into the live wire end jack and the neutral wire end jack respectively; Connect to the conductor 52 of the neutral line.

A depth limiting groove 33 is provided on the insulating protection seat 3 corresponding to the first plug 31 and the second plug 32 .

Specifically, open the safety protection door 53 jointly by the first plug 31 and the second plug 32, which is designed according to the opening principle of the safety protection door 53 of the new national standard socket 5, push the safety protection door 53, so that the first antenna, The second antenna can be close to the live wire conductor 51 and the neutral wire conductor 52; then through the setting of the depth limit groove 33, it is prevented that the first plug 31 and the second plug 32 are inserted into the transition and damage the socket 5.

Therefore, the design of the plug-in structure is ingenious, so that the first antenna and the second antenna can be close to the conductor 51 of the live line and the conductor 52 of the neutral line to improve the detection accuracy, protect the socket 5, and prolong the service life.

A method for inserting a voltage detection device into a socket, comprising: the insulating protection seat 3 drives the first plug 31 and the second plug 32 into the live wire end jack and the neutral wire end jack of the socket 5 respectively, the first plug 31, The second plug 32 exerts force together in a direction perpendicular to the safety protection door 53 to squeeze the safety protection door 53;

Push the first plug 31 and the second plug 32 in the direction of the depth limit groove 33 and continue to insert them to the limited position of the limit groove, so that the first end of the first plug 31 and the second plug 32 are respectively close to the live wire conductor 51 and the neutral wire. Conductor 52.

Specifically, the first plug 31 and the second plug 32 apply force together in a direction perpendicular to the safety protection door 53 to squeeze the safety protection door 53, and can easily push the safety protection door 53; and the process of inserting the socket 5 The operation is simplified without using tools outside the device; the process of inserting the voltage detection device into the socket 5 is easy to operate.

When in use, first turn on the power and insert the first plug 31 and the second plug 32 into the live line end jack and the neutral line end jack of the socket 5 respectively, and the first plug 31 and the second plug 32 are vertically The direction of the safety protection door 53 applies force together to extrude the safety protection door 53; the first plug 31 and the second plug 32 are pushed toward the depth limit groove 33 and continue to be inserted to the limit position of the limit groove, so that the first plug 31 1. The first end of the second plug 32 is respectively close to the live conductor 51 and the neutral conductor 52;

The first antenna and the second antenna respectively measure the voltage signal at the same time;

When the first antenna measures a voltage signal higher than the reference threshold, the micro-control unit 2 judges that the first antenna measurement target is the live wire, and controls the first light-emitting diode to light up, and then the live wire status indicator light 41 lights up in red;

When the second antenna measures a voltage signal higher than the reference threshold, the micro-control unit 2 judges that the measurement target of the second antenna is the live wire, and controls the second light-emitting diode to light up, and then the zero-line status indicator light 42 lights up red. .

The present invention has reasonable and ingenious design, convenient detection, no need for self-inspection, and the safety protection door 53 can be pushed back through the cooperation of the first plug 31 and the second plug 32, so that the first antenna can be closer to the charged body in the socket 5, ensuring measurement accuracy , and without using other tools other than this device, the detection process for the new national standard socket 5 is simple, time-saving and labor-saving; in addition, for the socket 5 without safety protection door 53, this device is also applicable and can meet the needs of customers , easy to popularize; moreover, through the setting of the second antenna, in cooperation with the first antenna, the measurement data of the live wire end and the neutral wire end of the socket 5 can be detected at the same time, and the detection efficiency is improved.

The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any person familiar with the art, without departing from the scope of the technical solution of the present invention, can use the technical means and technical content disclosed above to make many possible changes and modifications to the technical solution of the present invention, or modify it into an equivalent change, etc. effective example. Therefore, all equivalent changes made according to the shape, structure and principle of the present invention that do not deviate from the technical solution of the present invention shall fall within the scope of protection of the present invention.

Claims (10)

1. A non-contact voltage detecting apparatus, comprising: the device comprises a shell, a signal prompt module arranged on the shell and a detection identification circuit arranged in the shell;

an insulation protection seat is fixed at the front end of the shell, and a first plug and a second plug which are used for jacking the socket safety protection door and extending into the socket jack are arranged on the insulation protection seat;

a first antenna is fixed in the first plug and is connected with the input end of the detection identification circuit;

the signal prompt module is connected with the output end of the detection identification circuit.

2. The non-contact voltage detection device according to claim 1, wherein the detection identification circuit comprises a first analog-to-digital converter and a micro control unit which are connected in sequence;

the first antenna is connected to the input end of the first analog-to-digital converter, and the signal prompt module is connected with the output end of the micro control unit.

3. The noncontact voltage detecting device of claim 2, wherein a second antenna is fixed in said second plug;

the signal conversion unit further comprises a second analog-to-digital converter, and the second analog-to-digital converter is connected to the micro control unit;

the second antenna is connected to an input end of the second analog-to-digital converter.

4. The non-contact voltage detection device according to claim 2, wherein the signal prompt module comprises a live line status indicator light and a neutral line status indicator light;

and the live wire state indicator lamp and the zero line state indicator lamp are fixed on the shell and connected with the micro control unit.

5. The contactless voltage detection apparatus according to claim 4, wherein the live status indicator light includes a first light emitting diode therein, and the neutral status indicator light includes a second light emitting diode therein;

the first light emitting diode and the second light emitting diode are respectively connected to a first output end and a second output end of the micro control unit.

6. The non-contact voltage detecting device according to claim 5, wherein the live line status indicator light and the neutral line status indicator light each further comprise a third light emitting diode and a fourth light emitting diode;

the third light-emitting diode and the fourth light-emitting diode are respectively connected with a third output end and a fourth output end of the micro control unit;

the first light emitting diode and the second light emitting diode are red light emitting diodes, and the third light emitting diode and the fourth light emitting diode are green light emitting diodes.

7. The non-contact voltage detection device according to claim 4, wherein the signal prompt module further comprises a buzzer disposed in the housing;

the buzzer is connected with the third output end of the zero-live wire detection and identification device through an NPN type triode;

the emitter of the NPN type triode is grounded, and the collector and the base of the NPN type triode are respectively connected with the buzzer and the fifth output end of the micro control unit.

8. A plug-in structure of a non-contact voltage detection device and a socket is characterized in that the socket comprises a live wire end jack and a zero wire end jack which are arranged on a shell of the socket, and a live wire conductor and a zero wire conductor which are respectively arranged corresponding to the live wire end jack and the zero wire end jack; safety protection doors are arranged corresponding to the live wire end jack and the zero line end jack;

the first plug and the second plug jointly prop open the safety protection door and are respectively inserted into the live wire end jack and the null wire end jack;

the head ends of the first plug and the second plug are respectively close to the live wire connecting conductor and the zero wire connecting conductor.

9. The plug-in structure of the non-contact voltage detecting device and the socket according to claim 8, wherein a depth-limiting groove is formed in the insulating protection seat corresponding to the space between the first plug and the second plug.

10. A method of inserting a voltage sensing device into a receptacle, comprising: the insulation protection seat drives a first plug and a second plug to be respectively inserted into a live wire end jack and a zero wire end jack of the socket, and the first plug and the second plug apply force together along a direction perpendicular to the safety protection door to extrude the safety protection door;

and the first plug and the second plug are pushed towards the depth limiting groove direction to continue to be inserted into the limiting groove limiting position, so that the head ends of the first plug and the second plug are respectively close to the live wire conductor and the zero wire conductor.

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