CN201293805Y - AC voltage test pen - Google Patents

Abstract

The utility model relates to an electric signal test equipment, especially an alternating current signal test equipment. Including the shell and locate the detection pointed end of shell one end, detect a receiving antenna unit in pointed end connection, receiving antenna unit sends received voltage signal to main control unit, and main control unit is connected with the suggestion unit, and main control unit and suggestion unit connection power supply unit, main control unit connect a sensitivity regulating unit, its characterized in that: the sensitivity adjusting unit is a key adjusting unit. The utility model discloses a sensitivity regulatory function is that the life of adjusting the instrument like this of sensitivity size can prolong greatly through two electrically conductive buttons, owing to need not use the help of the instrument, uses more convenient and fast. The instrument has the function of setting the default sensitivity of starting, has visual prompt during adjustment to show the success of operation, and has corresponding visual prompt when the sensitivity is adjusted to the maximum or minimum.

Description

AC Voltage Test Pen

technical field

The utility model relates to an electric signal testing device, in particular to an alternating current signal testing device.

Background technique

At present, to detect whether there is AC voltage on the conductor, contact detectors and non-contact detectors can usually be used. The contact detector needs to be in direct contact with the uninsulated part of the conductor to detect whether there is AC voltage on the conductor. The non-contact detector judges whether there is an AC voltage on the conductor by detecting whether there is a changing electromagnetic field near the conductor, and does not need to be in direct contact with the conductor. Therefore, non-contact detectors have more advantages than contact detectors in terms of safety.

Non-contact voltage detectors usually have two types with adjustable sensitivity and non-adjustable sensitivity. They use sound (auditory) indication and visual (visual) indication or both sound and visual indication to indicate the presence of voltage detected by the detector. This instrument is a non-contact AC voltage detector with adjustable sensitivity, which has both visual indication and sound indication. However, it is different from the same type of detectors currently on the market: in terms of the sensitivity adjustment function, the latter uses the potentiometer The adjustment of the potentiometer usually requires the help of tools, which is a mechanical adjustment. Since the number of times the potentiometer is used is limited, the service life of the instrument is limited, and it is not very convenient to use.

Contents of the invention

One of the purposes of the utility model is to provide an AC voltage testing pen with long service life and convenient sensitivity adjustment.

The utility model adopts the following technical solutions:

It includes a shell and a detection tip located at one end of the shell. The detection tip is connected to a receiving antenna unit, and the receiving antenna unit sends the received voltage signal to the main control unit. The main control unit is connected to a prompt unit, and the main control unit and the prompt unit are connected to a power supply. unit, and the main control unit is connected with a sensitivity adjustment unit, which is characterized in that: the sensitivity adjustment unit is a button adjustment unit.

Preferably, an isolation unit for preventing high-voltage signals from entering the main control unit is further included between the receiving antenna unit and the main control unit.

Preferably, the prompt unit includes an audio prompt unit and a visual prompt unit.

Preferably, the housing is provided with a portable clip and a power switch.

Preferably, the sound prompt unit is a buzzer.

Preferably, the visual prompt unit is an LED.

Preferably, a cover is included between the detection tip and the housing, and the detection tip is an extension of the cover.

Preferably, the probe tip is a hollow structure.

Preferably, the cover is a transparent cover.

Preferably, the main control unit is connected with an operation instruction unit.

The sensitivity adjustment function of the utility model is to adjust the sensitivity through two conductive buttons, which are electronic adjustments just like the buttons on the TV remote control, so that the service life of the instrument will be greatly extended, and it is more convenient to use because no tools are needed fast. This instrument has the function of setting the default sensitivity when starting up. When adjusting, there is a visual prompt, indicating that the operation is successful. When the sensitivity is adjusted to the maximum or minimum, there is also a corresponding visual prompt, which can achieve the same effect as when the potentiometer is adjusted without using the potentiometer. Disadvantages when adjusting.

Description of drawings

Fig. 1 is the structural representation of the utility model first embodiment;

Fig. 2 is a schematic diagram of the functional module structure of the first embodiment of the utility model.

The purpose, functions and advantages of the utility model will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

Detailed ways

As shown in Fig. 1, the first embodiment of the present utility model is included in Fig. 1, and the appearance structure of this instrument has included a cover body 2 that is made of light-transmitting plastics, and the front end of cover body 2 has included and included a Detecting tip 1, button 3 are two conductive buttons for adjusting the sensitivity and setting the default sensitivity when starting up, the casing 4 is a secondary injection molding casing, the portable clip 5 is a clip installed on the casing, and the switch 6 is the base Instrument's manual power switch.

The mechanical components of the instrument are all made of non-conductive plastics to improve the safety of the instrument. The cover 2 is a light-transmitting cover, which is welded to the shell 4 by ultrasonic waves. The front end of the cover contains the detection tip. 1. The detection tip 1 is an extension of the cover body 2. It is also hollow inside and can be embedded in one end of the receiving antenna to receive the energy radiated by the AC voltage on the conductor. There is a small hole for the sound, and a part of the circuit board is included in the inside of the cover body 2. The light-emitting diode and the buzzer are welded on this part of the circuit board, so when the instrument detects that there is an AC voltage on the conductor, it can be seen through the cover. The light-emitting diodes see and hear the sound of the buzzer coming from the small hole on the cover. Button 3 is two conductive buttons with conductive rubber at the bottom, which are used to adjust the sensitivity of the instrument to make it larger or smaller. At the same time, these two buttons can also be used to set the default sensitivity of the instrument every time it is turned on. When the button is pressed When pressing down, the conductive rubber on the key short-circuits the line corresponding to the key part on the circuit board inside the housing, thereby generating a voltage signal and sending it to the control circuit, which will generate corresponding actions according to the signals of different keys. The shell 4 is a hollow secondary injection molded shell with a circuit board inside, a transparent cover 2 welded on the front end, a portable clip 5 installed in the middle, which is convenient for hanging the instrument on the user's pocket, and a A power switch 6 is provided, and the power switch 6 is connected with the switch of the power supply part on the internal circuit board for manual starting and shutting down.

In Fig. 2, the circuit function structure of the instrument includes the following several circuit units: the main control unit 7, which is composed of a single-chip microcomputer, is used for the operation and control of the entire circuit system; It gives certain instructions; the receiving antenna unit 9, one end of which is embedded in the detection tip 1, and the other end is welded on the circuit board where the signal enters, is used to receive the electromagnetic energy radiated by the AC voltage on the conductor; the isolation unit 10 is used for Prevent the high-voltage signal from the antenna unit from entering the control unit to damage the instrument; the key adjustment unit 11 is used in conjunction with the conductive key to complete the corresponding key operation; the sound prompt unit 12 is used to generate sound prompts, and the main control unit controls whether to generate sound Prompt; the visual prompt unit 13 is used to generate visual prompts, and the main control unit controls whether to generate visual prompts; the power supply 14 is used to provide electrical energy for each circuit unit of the system.

Each circuit unit of the instrument is welded on the circuit board. When the power of the instrument is turned on, the power supply unit 14 starts to supply power to each circuit unit of the instrument, and the entire circuit system starts to run. If the receiving antenna 9 of the instrument is embedded in the probe tip and is close to a conductor, and there is an AC voltage signal satisfying a certain amplitude and frequency on the conductor, the antenna will receive the electromagnetic field energy radiated from the conductor and convert it into The AC voltage signal of the corresponding frequency, this signal enters an A/D converter on the main control unit 7 after passing through the isolation unit 10, after the main control unit detects the signal coming from the receiving antenna, after certain calculation processing, the The amplitude and frequency of this signal are compared with a pre-set threshold value, if the signal amplitude is greater than the set threshold value and the frequency range also meets, the main control unit 7 will issue a prompt command to control the sound prompt unit 12 And the visual prompting unit 13 sends out corresponding sound prompts and visual prompts to prompt the user that there is an AC voltage signal on the conductor. 14 in the circuit function structure is a power supply module, which is used to provide electric energy for the system, which can be turned on or off by pressing the power switch 6 by the user. When the user forgets to turn off the power supply, the power supply module can also be activated by the main control module. Automatically shuts off to save power. 8 and 11 in the functional structure of the circuit are the operation indication unit and the key unit respectively, wherein there are two keys in the key unit, one is used to increase the detection sensitivity of the meter, and the other is used to reduce the detection sensitivity of the meter. When one of the keys is pressed, the key unit will send a specific level signal to the main control module. After receiving the key signal, the main control unit will first judge which key signal it is, and then increase or decrease accordingly. Detection sensitivity of small meters. Simultaneously, when the user has a button operation, the main control unit issues a command to make the operation prompt unit 8 produce a certain frequency of vision, indicating that there is a button operation. When the sensitivity of the instrument is adjusted to the maximum or minimum, the main control unit makes the operation The light emitting diode on the prompt unit 8 is always on to prompt that the sensitivity reaches the maximum or minimum. When the user wants to set the default sensitivity when starting up the instrument, the main control unit controls the operation unit 8 to make it generate another frequency of vision, prompting the user that the setting is successful. When the instrument is automatically turned off, the main control unit will first control the sound prompt unit 12 and the operation prompt unit 8 to generate a certain frequency of sound and visual prompts, and then issue an instruction to turn off the power module, thereby realizing automatic shutdown.

The above descriptions are only preferred embodiments of the present utility model, and are not therefore limiting the patent scope of the present utility model. Any equivalent structure or equivalent process transformation made by using the specification of the utility model and the contents of the accompanying drawings may be directly or indirectly used in Other relevant technical fields are all included in the patent protection scope of the present utility model in the same way.

Claims (10)

1, a kind of alternating voltage test pen, comprise shell and be located at the detection tip of shell one end, survey the most advanced and sophisticated receiving antenna unit that connects, the receiving antenna unit is sent to main control unit with the voltage signal that receives, main control unit is connected with Tip element, main control unit and Tip element connect power supply unit, and main control unit connects a sensitivity adjusting unit, it is characterized in that: described sensitivity adjusting unit is the button regulon.

2, alternating voltage test pen as claimed in claim 1 is characterized in that: comprise also between described receiving antenna unit and the main control unit that one is used to prevent that high-voltage signal from entering the isolated location of main control unit.

3, alternating voltage test pen as claimed in claim 1 or 2 is characterized in that: described Tip element comprises auditory tone cues unit and visual cues unit.

4, alternating voltage test pen as claimed in claim 1 or 2, it is characterized in that: described shell is provided with portable folder and power switch.

5, alternating voltage test pen as claimed in claim 3 is characterized in that: described auditory tone cues unit is a hummer.

6, alternating voltage test pen as claimed in claim 3 is characterized in that: described visual cues unit is LED.

7, alternating voltage test pen as claimed in claim 1 or 2 is characterized in that: comprise a cover body between described detection tip and the shell, surveying the tip is the extension of cover body.

8, alternating voltage test pen as claimed in claim 1 or 2 is characterized in that: described detection is most advanced and sophisticated to be hollow structure.

9, alternating voltage test pen as claimed in claim 7 is characterized in that: described cover body is a transparent cover.

10, alternating voltage test pen as claimed in claim 1 or 2 is characterized in that: described main control unit connects an operation indicating member.

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