CN110618303A - Voltage measuring device and method capable of realizing single-hole and double-hole switching detection - Google Patents

Abstract

The invention discloses a voltage measuring device capable of switching detection between single and double holes, comprising: a casing, a signal prompt module arranged on the casing, and a detection and identification circuit arranged in the casing; the front end of the casing is fixed with an insulating protection The insulating protection seat is provided with the first plug and the second plug which are used to open the safety protection door of the socket and extend into the socket jack; The first antenna and the second antenna connected to the input end of the detection and identification circuit are respectively fixed in the two plugs; a plug retractable mechanism for driving the second plug to extend and retract in the insulating protection seat is also provided in the casing. The invention also discloses a method for switching the single-hole detection and double-hole detection of the voltage measuring device. The invention has reasonable and ingenious design and convenient detection. The safety protection door can be pushed back through the cooperation of the first plug and the second plug, and the single-hole and double-hole detection states can be switched to meet the needs of more users and is easy to popularize.

Description

A voltage measuring device and method capable of single and double hole switching detection

technical field

The invention relates to the field of detection of zero and live wires, in particular to a voltage measuring device and method capable of switching and detecting single and double holes.

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;

Therefore, the market is in urgent need of a voltage measuring device that can be applied to the new national standard socket and is also applicable to the old national standard.

Contents of the invention

In order to solve the above problems, the present invention discloses a voltage measuring device and method for single and double hole switching detection.

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

A voltage measuring device capable of switching between single and double holes, comprising: a housing, a signal prompt module arranged on the housing, and a detection and identification circuit arranged in the housing; the front end of the housing is fixed with an insulating protection The insulating protection 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; the signal prompt module is connected to the output end of the detection and identification circuit, The first antenna and the second antenna connected to the input end of the detection and identification circuit are respectively fixed in the first plug and the second plug; Extending and retracting plug telescopic mechanism in the seat.

A plug guide hole is provided on the insulating protection base, and the second plug is inserted into the plug guide hole.

The plug telescopic mechanism includes a booster plate and a sliding guide groove provided on the inner wall of the housing corresponding to the plug guide hole, and the booster plate is movably installed in the sliding guide groove; the second plug and the booster plate Fixed connection.

Corresponding to the sliding guide groove, a telescopic guide groove is provided through the inner and outer walls of the housing, and a slider is movably installed in the telescopic guide groove; a first limiting block, a second limiting block, and a second limiting block are vertically arranged on the booster plate. As for the positioning block, a connecting plate is movably installed between the first limiting block and the second limiting block, and the slider is fixedly connected with the connecting plate.

The upper end of the sliding guide groove is extended with an ejection positioning groove; the right end of the ejection positioning groove is provided with an anti-deflection groove, and an anti-deflection protrusion is fixed on the slider corresponding to the anti-deflection groove.

The inner wall of the insulating protection seat is provided with a spring baffle corresponding to the first limiting block; a compression spring is fixedly connected to the spring baffle, and the compression spring is fixedly connected to the first limiting block.

The detection and identification circuit includes a signal conversion unit and a micro-control unit connected in sequence; the signal conversion unit includes a first analog-to-digital converter and a second analog-to-digital converter, and the first analog-to-digital converter and the second analog-to-digital converter The device is respectively connected to the first signal input end and the second signal input end of the micro control unit; the first antenna and the second antenna are respectively connected to the first analog-to-digital converter and the second analog-to-digital converter input.

The insulating protective seat is provided with a child-proof cover corresponding to the first plug and the second plug; the end of the insulating protective seat is provided with a protruding ring, and the end of the child-proof cover is provided with several Tightly fitted buckles; deformation reserved grooves are provided on both sides of the childproof cover corresponding to the buckles.

The child-resistant cover is also provided with a plug-in and pull-out booster block perpendicular to the direction of insertion and extraction of the child-proof cover.

A method for switching a voltage measuring device between single-hole detection and double-hole detection, comprising:

When switching the double-hole detection state, the slider moves in the sliding guide groove to the bottom of the ejection positioning groove, so that the second plug protrudes from the plug guide hole to the outside of the insulating protection seat;

The slider moves up to the ejection positioning groove, and the compression spring drives the anti-deflection protrusion of the slider into the anti-deflection groove;

When switching the single hole detection state, the slider moves to the left in the ejection positioning groove, so that the anti-deflection protrusion breaks away from the anti-deflection groove;

The slide block moves down to the sliding guide groove, and the compression spring pushes the slide block to move to the right to reset, driving the second plug to retract into the insulating protection seat along the plug guide hole.

The beneficial effects of the present invention are as follows: the present invention has a reasonable and ingenious design, and is convenient for detection. 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, and the measurement accuracy is ensured; 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, and the detection efficiency can be improved; and the detection state of single hole and double hole can be switched to meet the needs of more users, and it is easy to popularize ; Moreover, through the setting of the childproof cover, the first antenna and the second antenna can be effectively protected, the service life is prolonged, and it also provides assistance for promoting the popularization of the product to families.

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

Description of drawings

Fig. 1 is a front view of a voltage measuring device capable of switching between single and double holes in an embodiment of the present invention;

Fig. 2 is a schematic structural view of a childproof cover and an insulating protection seat in an embodiment of the present invention;

Fig. 3 is an exploded view of the telescoping mechanism of the housing and the plug in the embodiment of the present invention;

Fig. 4 is a structural schematic diagram of the telescoping mechanism of the housing and the plug in the embodiment of the present invention;

Fig. 5 is the circuit diagram of detection identification circuit in the embodiment of the present invention;

Fig. 6 is a diagram of the use state of the voltage measuring device capable of switching detection of single and double holes in the embodiment of the present invention when it is used to detect sockets.

Detailed ways

Embodiment, refer to Fig. 1 to Fig. 6. This embodiment provides a voltage measuring device capable of switching between single and double holes, including: a housing 1, a signal prompt module arranged on the housing 1, and a signal prompt module arranged on the housing. The detection and identification circuit in the body 1; the front end of the housing 1 is fixed with an insulating protective seat 2, and the insulating protective seat 2 is provided with a first plug for opening the socket safety protection door 61 and extending into the socket jack 21. The second plug 22; the signal prompt module is connected to the output end of the detection and identification circuit, and the first plug 21 and the second plug 22 are respectively fixed with a plug connected to the input end of the detection and identification circuit. The first antenna and the second antenna; a plug retractable mechanism 3 that drives the second plug 22 to extend and retract in the insulating protection seat 2 is also provided in the housing 1 .

Specifically, when detecting a socket with a safety protection door 61 in the new national standard, the second plug 22 is driven to stretch out in the insulating protection seat 2 through the plug telescopic mechanism 3; When the socket is used, it can maintain the double-plug state for insertion detection, and can also drive the second plug 22 to retract the insulating protection seat 2 through the plug telescopic mechanism 3, and switch to the single-plug state; therefore, the device can be applied to both new and old national standards. socket.

In addition, the first plug 21 and the second plug 22 are independent of each other. According to the opening principle of the safety protection door 61, the second plug 22 is provided so that the first plug 21 and the second plug 22 can be passed through during detection. Working together to open the safety protection door 61, so that the first antenna can be closer to the charged body 62 in the socket, to ensure the accuracy of measurement, and without using other tools outside the device, the detection process for the new national standard socket is simple, time-saving and labor-saving; It can meet the needs of customers and is easy to popularize.

Furthermore, 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. 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 insulating protection base 2 is provided with a plug guide hole, and the second plug 22 is inserted into the plug guide hole. The setting of the plug guide hole ensures that the distance between the second plug 22 and the first plug 21 remains unchanged after each extension.

The plug telescopic mechanism 3 includes a booster plate 31 and a sliding guide groove 11 arranged on the inner wall of the housing 1 corresponding to the plug guide hole, and the booster plate 31 is movably installed in the sliding guide groove 11; the second The plug 22 is fixedly connected to the booster board 31 . Drive the second plug 22 to move through the booster plate 31. First, the volume of the booster plate 31 is larger than the second plug 22, and the sliding stability is high; the second is to protect the second plug 22. Even if the telescopic function is used too much, the plug will If the telescopic mechanism 3 is damaged, the second plug 22 and the second antenna fixed in the second plug 22 will not be damaged. The maintenance cost of the second antenna must be higher than that of the plug telescopic mechanism 3, therefore, the maintenance cost can be effectively reduced.

Corresponding to the sliding guide groove 11, a telescopic guide groove 12 is provided through the inner and outer walls of the housing 1, and a slider 13 is movably installed in the telescopic guide groove 12; The positioning block 311 and the second limiting block 312 are movably installed with a connecting plate 32 between the first limiting block 311 and the second limiting block 312 , and the sliding block 13 is fixedly connected with the connecting plate 32 .

The upper end of the sliding guide groove 11 is extended with a ejection positioning groove 14; Anti-deflection bumps.

Specifically, the setting of the anti-deflection protrusion prevents the slider 13 from shifting in the ejection positioning groove 14, or accidentally touches a foreign object to cause the slider 13 to slip out of the ejection positioning groove 14, and is compressed by the force of the spring. The elastic force drives the sliding guide groove 11 to move to the right and reset, which ensures the stability of use.

The inner wall of the insulating protection seat 2 is provided with a spring baffle corresponding to the first limiting block 311; a compression spring 23 is fixedly connected to the spring baffle, and the compression spring 23 is fixed to the first limiting block 311. connect.

The detection identification circuit includes a signal conversion unit and a micro-control unit 4 connected in sequence; the signal conversion unit includes a first analog-to-digital converter and a second analog-to-digital converter, and the first analog-to-digital converter and the second analog-to-digital converter Converters are respectively connected to the first signal input end and the second signal input end of the micro control unit 4; the first antenna and the second antenna are respectively connected to the first analog-to-digital converter and the second analog-to-digital converter input terminal of the device.

Specifically, 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 1 and connected to the micro control unit 4 . The live wire state indicator light includes a first light emitting diode, and the zero line state light light includes a second light emitting diode; the first light emitting diode and the second light emitting diode are respectively connected to the first light emitting diode of the micro control unit 4. output terminal, the second output terminal.

Wherein, the live wire status indicator light and the zero line status indicator light respectively also include a third light emitting diode and a fourth light emitting diode; 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.

Therefore, 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 first The measurement signals of the live wire end and the neutral wire end measured by the antenna and the second antenna are simultaneously converted into digital signals and sent to the micro control unit 4, and the process does not interfere with each other, and the accuracy of the measurement results is guaranteed;

Furthermore, the micro-control unit 4 is preset with a reference threshold. When the first antenna measures a voltage signal higher than the reference threshold, the micro-control unit 4 judges that the measurement target of the first antenna is the live wire, and controls the first light-emitting When the diode lights up, the live wire status indicator lights up in red;

When the second antenna measures a voltage signal higher than the reference threshold, the micro-control unit 4 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 lights up in red;

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

And also have three-hole socket etc., the double plug of this voltage measuring device is difficult to insert, therefore need as above-mentioned arranging plug retractable mechanism 3, switch to single-hole detection state to adapt to more sockets of different specifications.

The insulating protection seat 2 is provided with a childproof cover 5 corresponding to the first plug 21 and the second plug 22; There are several buckles 51 tightly matched with the protruding ring 24 ; deformation reserved grooves 52 are provided on both sides of the childproof cover 5 corresponding to the buckles 51 .

Specifically, the setting of the childproof cover 5 can be placed on the insulating protection seat 2 when the device is not in use, and fixed by the convex ring 24 and the buckle 51, which can prevent children from damaging the first plug 21 and the second plug when they are playing. Two plugs 22; since the first plug 21 and the second plug 22 need to be inserted into the socket of the socket, their lateral thickness must be very small, and they are easily damaged when receiving a lateral external force;

In addition, the material used in the childproof cover 5 has weak deformation ability, so it has good protection performance, and the force required for the insertion and extraction process of the childproof cover 5 is slightly larger. The deformation damages the childproof cover 5, and the second is to reduce the required force for inserting and pulling out the protective cover.

Therefore, the setting of the childproof cover 5 can effectively protect the first antenna and the second antenna, reduce the probability of damage, prolong the service life, and provide assistance for popularizing the product to families.

The child-resistant cover 5 is also provided with a plug-and-extract booster block 53 perpendicular to the insertion and extraction direction of the child-resistant cover 5 .

Specifically, the setting of the plug-and-pull booster block 53 provides a good stress point for the plug-in and pull-out of the child-proof cover 5 , which is convenient for the plug-in and pull-out of the child-proof cover 5 .

A method for switching a voltage measuring device between single-hole detection and double-hole detection, comprising:

When switching the double-hole detection state, the slider 13 moves in the sliding guide groove 11 to the bottom of the ejection positioning groove 14, so that the second plug 22 protrudes from the plug guide hole to the outside of the insulating protection seat 2;

The slider 13 moves up to the ejection positioning groove 14, and the compression spring 23 drives the anti-deflection protrusion of the slider 13 into the anti-deflection groove 15;

When switching the single hole detection state, the slider 13 moves to the left in the ejection positioning groove 14, so that the anti-deflection protrusion is separated from the anti-deflection groove 15;

The slider 13 moves down to the sliding guide groove 11, and the compression spring 23 pushes the slider 13 to move to the right and resets, driving the second plug 22 to retract into the insulating protection seat 2 along the plug guide hole.

When measuring a socket with a safety protection plate, the buckle 51 is disengaged from the convex ring 24 and the childproof cover 5 is taken out by applying force through the plug-in booster block 53, and the insulating protection seat 2 drives the first plug 21 and the second plug 22 are respectively inserted into the left and right jacks of the socket, and the first plug 21 and the second plug 22 apply force together in a direction perpendicular to the safety protection door 61 to squeeze and open the safety protection door 61 and push the first plug 21, The first end of the second plug 22 is respectively close to the live wire electrified body 62 and the neutral wire electrified body 62 of the socket;

After the detection, the insulating protection seat 2 drives the first plug 21 and the second plug 22 to be pulled out from the left and right jacks of the socket, and the childproof cover 5 corresponds to the first plug 21 and the second plug 22 to be set on the insulating protection seat 2 , the buckle 51 is buckled on the protruding ring 24 by applying force through the plug-in and pull-out booster block 53 .

The present invention is reasonable and ingenious in design, and detection is convenient, and the safety protection door 61 can be pushed back through the cooperation of the first plug 21 and the second plug 22, so that the first antenna can be closer to the charged body 62 in the socket to ensure measurement accuracy; The antenna setting, in conjunction with the first antenna, can detect the measurement data of the live wire end and the neutral wire end of the socket at the same time, which improves the detection efficiency; and can switch the detection state of single hole and double hole to meet the needs of more users and is easy to popularize; moreover , through the setting of the childproof cover 5, the first antenna and the second antenna can be effectively protected, and the service life is prolonged, which also provides assistance for popularizing the product to families.

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 voltage measuring device capable of single-hole and double-hole switching detection is characterized by 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;

the signal prompting module is connected with the output end of the detection identification circuit, and a first antenna and a second antenna which are connected with the input end of the detection identification circuit are respectively fixed in the first plug and the second plug;

and a plug telescopic mechanism for driving the second plug to extend and retract in the insulating protection seat is also arranged in the shell.

2. The apparatus according to claim 1, wherein the insulating protection seat has a plug guide hole, and the second plug is inserted into the plug guide hole.

3. The apparatus for measuring voltage according to claim 2, wherein the plug retracting mechanism comprises a force-assisting plate and a sliding guide groove disposed on the inner wall of the housing corresponding to the plug guide hole, the force-assisting plate being movably mounted in the sliding guide groove;

the second plug is fixedly connected with the power assisting plate.

4. The apparatus for measuring voltage according to claim 3, wherein a telescopic guide slot is provided corresponding to the sliding guide slot through the inner and outer wall surfaces of the casing, and a slide block is movably mounted in the telescopic guide slot;

the boosting plate is vertically provided with a first limiting block and a second limiting block, a connecting plate is movably arranged between the first limiting block and the second limiting block, and the sliding block is fixedly connected with the connecting plate.

5. The apparatus for measuring voltage according to claim 4, wherein the sliding guide slot has an ejection positioning slot extending from an upper end thereof;

the right end of the ejection positioning groove is provided with an anti-deviation groove, and an anti-deviation lug is fixed on the sliding block corresponding to the anti-deviation groove.

6. The apparatus according to claim 5, wherein the inner wall of the insulating protection seat is provided with a spring baffle corresponding to the first limiting block;

and the spring baffle is fixedly connected with a compression spring which is fixedly connected with the first limiting block.

7. The apparatus for measuring voltage according to claim 1, wherein the detection and identification circuit comprises a signal conversion unit and a micro control unit connected in sequence;

the signal conversion unit comprises a first analog-to-digital converter and a second analog-to-digital converter, wherein the first analog-to-digital converter and the second analog-to-digital converter are respectively connected to a first signal input end and a second signal input end of the micro control unit;

the first antenna and the second antenna are respectively connected to the input ends of the first analog-to-digital converter and the second analog-to-digital converter.

8. The apparatus according to claim 1, wherein a child-resistant cover is sleeved on the insulating protection seat corresponding to the first plug and the second plug;

the tail end of the insulating protection seat is provided with a convex ring, and the tail end of the child protection cover is provided with a plurality of buckles which are tightly matched with the convex ring;

and deformation preformed grooves are arranged on the child protection cover corresponding to the two sides of the buckle.

9. The apparatus according to claim 8, wherein the child-proof cover further comprises a plug-in assisting block perpendicular to the plug-in direction of the child-proof cover.

10. A method for switching single-hole detection and double-hole detection of a voltage measuring device is characterized by comprising the following steps:

when the double-hole detection state is switched, the sliding block moves to the position below the ejection positioning groove in the sliding guide groove, so that the second plug extends out of the insulation protection seat from the plug guide hole;

the slide block moves up to the ejection positioning groove, and the compression spring drives the anti-deviation lug of the slide block to be clamped into the anti-deviation groove;

when the single-hole detection state is switched, the sliding block moves leftwards in the ejection positioning groove, so that the deviation-preventing convex block is separated from the deviation-preventing groove;

the sliding block moves downwards to the sliding guide groove, the compression spring pushes the sliding block to move rightwards to reset, and the second plug is driven to retract into the insulating protection seat along the plug guide hole.