CN211206755U - Zero live wire identification system with detect function - Google Patents

Abstract

The utility model discloses a zero live wire identification system with detect function, include: the signal conversion unit, the zero-live line detection and identification device and the signal prompt module are sequentially connected; 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 zero-live wire detection and identification device; the input ends of the first analog-to-digital converter and the second analog-to-digital converter are respectively connected with a first antenna which can extend into the jack of the socket and is used for detecting a live wire and a second antenna which can extend into the jack of the socket and is used for detecting a zero wire. The utility model has reasonable and ingenious design, saves time and labor, can determine whether the live wire is open-circuited, whether the zero line is open-circuited and whether the line wiring is abnormal by one-time measurement, and improves the detection efficiency; even non-professional personnel can also relax the differentiation socket whether can normally use, improved the application scope of this product, easily popularize.

Description

A zero-fire wire identification system with detection function

technical field

The utility model relates to the field of zero live line detection, in particular to a zero live line identification system with a detection function.

Background technique

With the development of the electronics industry, the types of sockets tend to be diversified. Among them, the wiring of the neutral wire of the two-hole socket is easy to be confused. Since the normal switch controls the live wire, if the wiring is wrong, closing the switch will only break the neutral wire, and the live wire is still energized. , it is easy to cause an electric shock accident; at the same time, some electrical appliances have requirements for the connection of the zero wire and cannot be reversed. Before use and during maintenance operations, it is often necessary to test the national standard two-hole socket.

At present, the detection device for the national standard two-hole socket has a relatively common test pen. By inserting it into the socket of the socket in turn, the status of the induction signal of the two-hole zero-live wire of the socket is respectively tested, and the neutral and live wire of the socket is distinguished by artificially comparing the indication status effect; The detection efficiency is low. Secondly, the detection device configured for the maintenance personnel must have a self-inspection function. Otherwise, due to the failure of the device itself, there is no response reminder when it is inserted into the live wire hole, so that the operator mistakenly thinks that this hole is connected to the neutral wire. , resulting in serious safety hazards;

In addition, conventional detection devices cannot provide open circuit abnormality detection, and it is necessary to rely on the experience of maintenance personnel to draw conclusions after multiple tests. Maintenance personnel often ignore problems such as open circuit abnormality when testing through conventional detection devices, resulting in two It takes time and effort to repair the situation.

Utility model content

In order to solve the above problems, the utility model discloses a zero live wire identification system with detection function.

The technical scheme that the utility model adopts for realizing the above-mentioned purpose is:

A zero live wire identification system with detection function, comprising: a signal conversion unit, a zero live wire detection and identification device and a signal prompt module connected in sequence; the signal conversion unit includes a first analog-to-digital converter and a second analog-to-digital converter, The first analog-to-digital converter and the second analog-to-digital converter are respectively connected to the first signal input end and the second signal input end of the zero live wire detection and identification device; the first analog-to-digital converter and the second analog-to-digital converter The input ends of the digital converter are respectively connected with a first antenna which can be inserted into the socket jack for detecting the live wire and a second antenna which is used for detecting the neutral wire.

The signal prompting module includes a first indicator light and a second indicator light; the first indicator light and the second indicator light are respectively connected to the first output end and the second output end of the zero live wire detection and identification device.

The signal prompting module further includes a buzzer; the buzzer is connected to the third output end of the zero live wire detection and identification device through an NPN transistor.

The emitter stage of the NPN triode is grounded, and its collector and base are respectively connected to the buzzer and the third output end of the zero live wire detection and identification device.

The input ends of the first analog-to-digital converter and the second analog-to-digital converter are both connected with a first voltage dividing resistor and a second voltage dividing resistor with equal resistance values; a capacitor is connected in parallel with the second voltage dividing resistor.

The signal prompting module further comprises a third indicator light and a fourth indicator light which are respectively connected with the fourth output end and the fifth output end of the zero live wire detection and identification device.

The first indicator light and the second indicator light are red light-emitting diodes, and the third indicator light and the fourth indicator light are green light-emitting diodes.

The resistance of the first voltage dividing resistor is 10 megohms, and the capacitance of the capacitor is 470 picofarads.

A protection resistor is connected in series between the first indicator light, the second indicator light, the third indicator light, the fourth indicator light and the neutral and live wire detection and identification device.

The first antenna and the second antenna are covered with insulating protective sleeves.

The beneficial effects of the utility model are as follows: the utility model has a reasonable and ingenious design, one measurement can determine whether the live wire is open, whether the neutral wire is open, and whether the line wiring is abnormal; the detection efficiency is improved, and secondary detection is avoided; The setting of the antenna can measure the left and right jacks of the socket at the same time, which will not mislead the user due to the lack of feedback, which solves the potential safety hazard of conventional test pens, and does not require self-checking, which saves time and at the same time Reduce costs; in addition, 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.

The present utility model will be further described below with reference to the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the circuit diagram of the present utility model;

FIG. 2 is a flow chart of detecting a national standard socket in an embodiment of the present invention.

Detailed ways

Embodiment, referring to FIG. 1 to FIG. 2, a zero live wire identification system with detection function provided in this embodiment includes: a signal conversion unit, a zero live wire detection and identification device and a signal prompt module connected in sequence; the signal conversion unit includes: a first analog-to-digital converter and a second analog-to-digital converter, the first analog-to-digital converter and the second analog-to-digital converter are respectively connected to the first signal input end and the second signal input of the zero live wire detection and identification device The input ends of the first analog-to-digital converter and the second analog-to-digital converter are respectively connected with a first antenna extending into the socket jack for detecting live wire and a second antenna for detecting neutral wire.

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 first analog-to-digital converter (ADC_L) and the second analog-to-digital converter (ADC_N) Setting, the live wire terminal measurement signal and the neutral wire terminal measurement signal obtained by the first antenna and the second antenna measurement can be simultaneously converted into digital signals and sent to the zero live wire detection and identification device 2, and the process does not interfere with each other, and the measurement results The accuracy is guaranteed; the first antenna and the second antenna are covered with an insulating protective cover to prevent the first antenna and the second antenna from directly contacting the power supply.

In addition, compared with conventional test pens and conventional detection methods, firstly, only one measurement is needed to obtain the results of whether the live wire is open, whether the neutral wire is open, and whether the line wiring is abnormal, and prompt the module to feedback through a signal. High, even non-professional maintenance personnel can know the abnormal situation of the measured target from the feedback of the signal prompting module; the second is to measure through the first antenna and the second antenna at the same time, even if the user is negligent, without giving the When the system is powered on or the power supply of the system fails, it is directly used for measurement. The system just cannot run normally, and cannot give feedback to the user through the signal prompt module; This socket is open and open circuit and other misleading, which greatly reduces the potential safety hazards. Therefore, compared with the conventional test pen, the zero-fire wire identification system with detection function does not need to configure the self-check function to ensure that it does not mislead the maintenance personnel, and solves the problem. The safety hazards of conventional test pens.

The signal prompting module includes a first indicator light and a second indicator light; the first indicator light and the second indicator light are respectively connected to the first output end and the second output end of the zero live wire detection and identification device.

The signal prompting module further includes a buzzer; the buzzer is connected to the third output end of the zero live wire detection and identification device through an NPN transistor.

The emitter stage of the NPN triode is grounded, and its collector and base are respectively connected to the buzzer and the third output end of the zero live wire detection and identification device.

Specifically, the NPN type triode plays a switch function, and the NPN type triode is controlled to turn on the buzzer through the zero live wire detection and identification device 2, so that the buzzer alarms to play a warning role to the user;

Among them, when the zero live wire detection and identification device 2 judges that the measured target live wire is open, the neutral wire is open, and the line wiring is abnormal, the buzzer is turned on through the NPN transistor to make the buzzer alarm.

The input ends of the first analog-to-digital converter and the second analog-to-digital converter are both connected with a first voltage dividing resistor and a second voltage dividing resistor with equal resistance values; a capacitor is connected in parallel with the second voltage dividing resistor.

Specifically, a capacitor is connected in parallel with the voltage dividing resistor to form a filter circuit, which reduces high-frequency interference and makes the detection result more accurate.

The signal prompting module further comprises a third indicator light and a fourth indicator light which are respectively connected with the fourth output end and the fifth output end of the zero live wire detection and identification device.

The first indicator light and the second indicator light are red light-emitting diodes, and the third indicator light and the fourth indicator light are green light-emitting diodes.

The resistance of the first voltage dividing resistor is 10 megohms, and the capacitance of the capacitor is 470 picofarads.

A protection resistor is connected in series between the first indicator light, the second indicator light, the third indicator light, the fourth indicator light and the neutral and live wire detection and identification device.

The first antenna and the second antenna are covered with insulating protective sleeves.

In a preferred embodiment, the signal prompting module further includes a display screen, which is connected to the zero live wire detection and identification device 2 for displaying the operation result of the zero live wire detection and identification device 2; the operation result.

The process of detecting the national standard socket by the zero-fire wire identification system with detection function is as follows: the system is powered on, and the first antenna and the second antenna are respectively inserted into the right and left jacks of the socket according to the national standard, and obtain the live wire. terminal measurement signal and neutral terminal measurement signal;

The measurement signal of the live wire end and the measurement signal of the zero wire end are respectively converted into digital signals by the first analog-to-digital converter (ADC_L) and the second analog-to-digital converter (ADC_N), and then sent to the zero live wire detection and identification device 2 to obtain the analog-to-digital signal. The measurement signal of the live wire end and the measurement signal of the neutral wire end converted by the converter; then pass = judge whether the measurement signal of the live wire end and the measurement signal of the neutral wire end are greater than the preset reference threshold; then measure the signal of the live wire end and the measurement signal of the neutral wire end When it is less than the reference threshold, it is determined that the live wire is open, and the buzzer is controlled to give an alarm. At this time, the first indicator light, the second indicator light, the third indicator light and the fourth indicator light are all off; then measure the signal and neutral line at the live wire end. When the measurement signal of the terminal is greater than the reference threshold, it is judged whether the absolute value of the difference between the measurement signal of the live terminal and the measurement signal of the neutral terminal is smaller than the preset fluctuation threshold; then, the difference between the measurement signal of the live terminal and the measurement signal of the neutral terminal is determined When the absolute value of the signal is less than the fluctuation threshold, it is determined that the zero line is open, and the first indicator light and the second indicator light are controlled to light red to drive the buzzer to alarm; then measure the absolute value of the difference between the live line end and the zero line end. When the value is greater than the fluctuation threshold, compare the measurement signal of the live wire end and the measurement signal of the neutral wire end; finally, when the measurement signal of the live wire end is greater than the measurement signal of the neutral end, it is determined that the line connection is normal, and the first indicator light is controlled to light red, and the fourth The indicator light is green; when the measurement signal of the live wire end is less than the measurement signal of the neutral wire end, it is determined that the wiring is abnormal, the third indicator light is controlled to light green, the second indicator light is red, and the buzzer is driven to alarm.

When the user detects the national standard socket through the zero-fire wire identification system with detection function, he can know whether the socket is abnormal according to whether the buzzer alarms; and then according to the first indicator light, the second indicator light, the third indicator light, The lighting situation of the fourth indicator light can distinguish the abnormal type. Even non-professionals can easily distinguish whether the socket can be used normally, which improves the scope of application of the product and is easy to popularize; in a preferred embodiment, abnormal types can also be distinguished by the text displayed on the screen.

The design of the utility model is reasonable and ingenious, and one measurement can determine whether the live wire is open, the neutral wire is open, and whether the line connection is abnormal; the detection efficiency is improved, and secondary detection is avoided; The left and right jacks of the tester are used for measurement, which will not mislead the user due to the lack of feedback, solve the hidden safety problems of the conventional test pen, and do not need self-testing, which saves time and reduces costs; in addition, even non-professionals Personnel can also easily distinguish whether the socket can be used normally, which improves the scope of application of this product and is easy to popularize.

The above descriptions are only preferred embodiments of the present invention, and do not limit the present invention in any form. Any person skilled in 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 be modified to equivalent changes. equivalent example. Therefore, all equivalent changes made according to the shape, structure and principle of the present utility model without departing from the technical solution of the present utility model shall be included in the protection scope of the present utility model.

Claims (10)

1. A null line and live line identification system with a detection function is characterized by comprising: the signal conversion unit, the zero-live line detection and identification device and the signal prompt module are sequentially connected;

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 zero-live wire detection and identification device;

the input ends of the first analog-to-digital converter and the second analog-to-digital converter are respectively connected with a first antenna which can extend into the jack of the socket and is used for detecting a live wire and a second antenna which can extend into the jack of the socket and is used for detecting a zero wire.

2. The system for identifying a null line and a live line with a detection function according to claim 1, wherein the signal prompt module comprises a first indicator light and a second indicator light;

the first indicator light and the second indicator light are respectively connected to a first output end and a second output end of the zero-live wire detection and identification device.

3. The system for identifying a null line and a live line with a detection function according to claim 2, wherein the signal prompt module further comprises a buzzer;

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

4. The system according to claim 3, wherein the emitter of the NPN transistor is grounded, and the collector and the base of the NPN transistor are respectively connected to the third output terminals of the buzzer and the zero-live line detection and identification device.

5. The system for identifying the null line and the live line with the detection function as claimed in claim 1, wherein the input ends of the first analog-to-digital converter and the second analog-to-digital converter are respectively connected with a first voltage dividing resistor and a second voltage dividing resistor which have the same resistance;

and a capacitor is connected in parallel to the second voltage-dividing resistor.

6. The null and live wire recognition system with the detection function as claimed in claim 2, wherein the signal prompt module further comprises a third indicator light and a fourth indicator light respectively connected to a fourth output end and a fifth output end of the null and live wire detection recognition device.

7. The fire and zero line recognition system with detection function of claim 6, wherein the first indicator light and the second indicator light are red light emitting diodes, and the third indicator light and the fourth indicator light are green light emitting diodes.

8. The system for identifying hot and zero lines with detection function as claimed in claim 5, wherein the resistance of the first voltage dividing resistor is 10 mega ohms, and the capacitance of the capacitor is 470 pico farads.

9. The system for identifying a null line and a live line with a detection function according to claim 6, wherein a protection resistor is connected in series between the first indicator light, the second indicator light, the third indicator light, the fourth indicator light and the null line and live line detection and identification device.

10. The null-line and live-line identification system with the detection function according to claim 1, wherein the first antenna and the second antenna are sleeved with insulating protective sleeves.

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