CN205679681U - A kind of portable digital voltmeter - Google Patents

Abstract

The utility model relates to the technical field of electric power detection equipment, which is a portable digital voltmeter. The detection module and the data transmission module are respectively arranged inside the voltmeter shell; the data acquisition module is connected to the input end of the single-chip microcomputer through the analog-to-digital conversion module, and the output end of the single-chip microcomputer is respectively connected to the data display module, the function self-test module and the data transmission module, and through The data display module is connected to the display screen, and communicates with the monitoring equipment of the monitoring center through the data transmission module; the lower surface of the voltmeter shell is provided with claws, a support plate and a measuring pen storage socket. It has a wireless transmission module, which can transmit the detection results to the monitoring center in time, and solves the problems that the voltmeter in the prior art does not have the function of automatic recording and the voltmeter is inconvenient to carry.

Description

A Portable Digital Voltmeter

technical field

The utility model relates to the technical field of electric power detection equipment, in particular to a voltmeter, more specifically, a portable digital voltmeter.

Background technique

A voltmeter is an instrument for measuring voltage. In the power system, the fault detection of circuit lines and circuit components is inseparable from the voltmeter.

At present, voltmeters are divided into two categories, one is the traditional electromagnetic induction pointer voltmeter, and the other is the digital voltmeter. Among them, the digital voltmeter has the advantages of convenient use and high precision.

Due to the large scale of the actual power testing site, there are many testing lines and components, sometimes it is difficult to draw testing conclusions directly on site, and it is often necessary to bring back all the measurement results, and then do further analysis to draw conclusions; there are also Sometimes, in the process of on-site inspection, it is necessary to record the inspection results in order to analyze the damage of each line and component and the cause of the damage, so as to prevent it. However, the existing recording method is manual recording, and the operation is relatively complicated, while the general on-line detection device has a complicated structure and a large volume, and is not suitable for carrying around.

Contents of the invention

The problem to be solved by the utility model is to provide a portable digital voltmeter, which has a wireless transmission module, which can transmit the detection results to the monitoring center in time, and solve the problem that the voltmeter in the prior art does not have the function of automatic recording, and the voltage The problem of inconvenient portability.

The technical scheme adopted to solve its problem is, a kind of portable digital voltmeter, comprises voltmeter shell, display screen, data acquisition module, analog-to-digital conversion module, single-chip microcomputer, data display module, function self-inspection module and data transmission module; The display screen is set on the upper surface of the voltmeter shell, and the data acquisition module, analog-to-digital conversion module, single-chip microcomputer, data display module, function self-check module and data transmission module are respectively set inside the voltmeter shell; The data acquisition module is connected to the input end of the single-chip microcomputer through the analog-to-digital conversion module, and the output end of the single-chip microcomputer is connected to the data display module, the function self-check module and the data transmission module respectively, and is connected to the data display module through the data display module. The display screen communicates with the monitoring equipment of the monitoring center through the data transmission module; the lower surface of the voltmeter housing is provided with claws, a support plate and a measuring pen storage socket.

Further, the upper surface of the voltmeter housing is also provided with a self-test button, a transmission button and a function adjustment knob, the self-test button is connected to the functional self-test module; the transmission button is connected to the data transmission module; The data acquisition module includes a plurality of voltage acquisition circuits with different measurement ranges, and the function adjustment knob is connected to the data acquisition module and switches between the voltage acquisition circuits.

Further, the upper surface of the voltmeter housing is also provided with a power switch and a group of wiring holes, the number of the wiring holes is 4, and the wiring holes are connected to the data acquisition module.

Further, the data transmission module includes one or more of a WIFI communication module, a GPRS transmission module, and a Bluetooth module.

Further, the monitoring equipment of the monitoring center is a computer, a mobile phone or a tablet computer.

Further, the display screen is an LED display screen or an LCD display screen.

Further, an alarm device is provided on the side wall of the housing of the voltmeter, and the alarm device is connected to the single-chip microcomputer; the alarm device is an audible and visual alarm device.

Further, the housing of the voltmeter is rotatably connected to the opening end of the U-shaped support plate through a rotating shaft, and the claws are located in the space formed by the U-shaped support plate; the number of measuring pen storage sockets is two, and they are located at In the gap between the claw and the U-shaped support plate.

Further, a horn is provided on the side wall of the voltmeter casing, and a voice broadcast module is provided inside the voltmeter casing, and the output end of the single-chip microcomputer is connected to the voice broadcast module and the speaker.

The beneficial effect of a kind of portable digital voltmeter of the utility model is:

Since the display screen is arranged on the upper surface of the voltmeter casing, the data acquisition module, the analog-to-digital conversion module, the single-chip microcomputer, the data display module, the functional self-check module and the data transmission module are respectively arranged inside the voltmeter casing; the lower surface of the voltmeter casing Equipped with claws, support plate and measuring pen storage socket. Its structure is simple, compact, small in size, and easy to carry; since there are claws on the shell of the voltmeter, the voltmeter can also be snapped into a backpack or pocket through the claws; since the voltmeter is equipped with a measuring pen storage socket, it can be conveniently Insert the test pen into it to prevent the loss of the test pen; because the output end of the single-chip microcomputer is connected to the data transmission module, and the data transmission module communicates with the monitoring equipment of the monitoring center, the detection result can be transmitted to the monitoring center in time, which solves the problem of existing technology The voltmeter in the meter does not have the function of automatic recording, and the recorded data is accurate and the operation is simple and convenient.

Description of drawings

Fig. 1 is the front view of the utility model portable digital voltmeter;

Fig. 2 is the rear view of the utility model portable digital voltmeter;

Fig. 3 is a schematic diagram of the utility model portable digital voltmeter.

Among them, 1 voltmeter shell; 2 display screen; 3 alarm device; 4 function adjustment knob; 5 power switch; 6 horn; 7 self-test button; 8 transmission button; 9 wiring hole; ; 12 jaws.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described below in conjunction with the accompanying drawings and embodiments.

As shown in Figures 1-3, this embodiment provides a portable digital voltmeter, which mainly includes a voltmeter housing 1, a display screen 2, a data acquisition module, an analog-to-digital conversion module, a single-chip microcomputer, a data display module, and a function self-test module and data transfer module.

As shown in Figure 1, the display screen 2 is arranged on the upper surface of the voltmeter casing 1, and the data acquisition module, the analog-to-digital conversion module, the single-chip microcomputer, the data display module, the function self-check module and the data transmission module are arranged on the voltmeter casing 1 respectively. Internally, this voltmeter has a simple and compact structure, which makes the voltmeter small and portable. As shown in Figure 3, the data acquisition module is connected to the input terminal of the single-chip microcomputer through the analog-to-digital conversion module. The analog voltage signal collected by the data acquisition module is converted into a digital voltage signal by the analog-to-digital conversion module and then transmitted to the single-chip microcomputer. The output end of the single-chip microcomputer is respectively connected to the data display module, the function self-check module and the data transmission module, and the single-chip microcomputer is connected to the display screen 2 through the data display module, and the display screen 2 displays readings and operation instructions. The single-chip microcomputer communicates with the monitoring equipment of the monitoring center through the data transmission module, and can transmit the detection results to the monitoring center through wireless in time.

In addition, the upper surface of the voltmeter housing 1 is also provided with a self-test button 7, a transmission button 8 and a function adjustment knob 4. The self-test button 7 is connected to the functional self-test module to control the start of the functional self-test module. After the self-test module is started, Compare the regulated reference voltage of the voltmeter’s self-contained battery with the voltage value of the measured output terminal. If the voltage error is less than or equal to the set value, the display 2 will prompt that the voltmeter is normal. If the voltage error is greater than the set value, the display will 2 It indicates that the voltmeter is abnormal. The transmission button 8 is connected to the data transmission module to control the start of the data transmission module. When the transmission button 8 is pressed, the data will be transmitted to the monitoring equipment of the monitoring center, otherwise, the data will not be transmitted to the monitoring equipment of the monitoring center. The data acquisition module includes a plurality of voltage acquisition circuits with different measurement ranges. The function adjustment knob 4 is connected to the data acquisition module and switches between each voltage acquisition circuit. When the function adjustment knob 4 is rotated to a gear position of a measurement range, Then automatically switch to the corresponding voltage acquisition circuit, so as to adjust the measurement voltage range.

As shown in FIG. 1 , a power switch 5 and a group of wiring holes 9 are also provided on the upper surface of the voltmeter housing 1 , wherein the number of wiring holes 9 is four, and the wiring holes 9 are connected to the data acquisition module.

As shown in FIG. 2 , the lower surface of the voltmeter housing 1 is provided with claws 12 , a support plate 10 and a measuring pen storage socket 11 . Preferably in this embodiment, the open end of the U-shaped support plate 10 is rotationally connected with the voltmeter case 1 through a rotating shaft. When the U-shaped support plate 10 rotates outward and forms a certain angle with the voltmeter case 1, it can be used for Support the voltmeter to keep it in an upright state, which is convenient for users to observe the readings and operate. The claw 12 is located in the space formed by the U-shaped plate, and is preferably located at the center of the lower surface of the entire voltmeter casing 1, so that the voltmeter can be snapped into a backpack or pocket through the claw 12. There are two measuring pen storage sockets 11, which are respectively located in the gap between the claw 12 and the U-shaped plate. In this embodiment, the two measuring pen storage sockets 11 are respectively located on both sides of the claw 12. In practical applications, The two measuring pen storage sockets 11 can also be located on the same side of the claw 12 .

In this embodiment, the data transmission module includes one or more of a WIFI communication module, a GPRS transmission module, and a Bluetooth module. The monitoring equipment in the monitoring center includes computers, mobile phones or tablet computers. The display screen 2 is an LED display screen 2 or an LCD display screen 2 .

The material of the voltmeter casing 1 is an insulating polymer material, which has a waterproof protection function to prevent the internal circuit from being damaged due to water ingress, or causing danger to the user.

And the side wall of voltmeter housing 1 is provided with alarm device 3, and alarm device 3 is connected with single-chip microcomputer; Alarm device 3 is sound and light alarm device 3. When the functional self-check module detects that the voltmeter is abnormal, or when the measured voltage exceeds the measurement range, the alarm device 3 will alarm.

In this embodiment, the voltmeter also includes a voice broadcast module and a loudspeaker 6, and the loudspeaker 6 is arranged on the side wall of the voltmeter shell 1, and the voice broadcast module is arranged in the inside of the voltmeter shell 1, and the output terminal of the single-chip microcomputer is connected with the voice broadcast module and the voltmeter shell 1. The speaker 6 is connected, and when a voltage value is detected, the speaker 6 can automatically read the value and broadcast it, which is convenient for users to use.

The embodiments of the present utility model are only used to illustrate the technical scheme of the present utility model, but not to limit it; although the utility model has been described in detail with reference to the foregoing embodiments, those of ordinary skill in the art should understand that: it still can The technical solutions recorded in the foregoing embodiments are modified, or some of the technical features are replaced equivalently; and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims (9)

1. a portable digital voltmeter, it is characterised in that include voltmeter shell, display screen, data acquisition module, modulus Modular converter, single-chip microcomputer, data disaply moudle, function selftest module and data transmission module；Described display screen is arranged at described The upper surface of voltmeter shell, described data acquisition module, analog-to-digital conversion module, single-chip microcomputer, data disaply moudle, function self-inspection Module and data transmission module are respectively arranged at the inside of described voltmeter shell；Described data acquisition module passes through described modulus Modular converter connects the input of described single-chip microcomputer, and the outfan of described single-chip microcomputer connects described data disaply moudle, merit respectively Energy selftest module and data transmission module, and connect described display screen by described data disaply moudle, passed by described data Defeated module and the monitoring device communication of Surveillance center；The lower surface of described voltmeter shell is provided with claw, gripper shoe and measuring pen Storage socket.

Portable digital voltmeter the most according to claim 1, it is characterised in that the upper surface of described voltmeter shell is also Being provided with self-inspection button, transmission button and function point analysis knob, described self-inspection button connects described function selftest module；Described transmission Button connects described data transmission module；Described data acquisition module includes the voltage collection circuit that multiple measurement scope is different, Described function point analysis knob is connected with described data acquisition module, and is switching between voltage collection circuit each described.

Portable digital voltmeter the most according to claim 1, it is characterised in that the upper surface of described voltmeter shell is also Being provided with on and off switch and one group of wiring hole, the quantity of described wiring hole is 4, and described wiring hole is with described data acquisition module even Connect.

Portable digital voltmeter the most according to claim 1 and 2, it is characterised in that described data transmission module includes WIFI communication module, GPRS transmission module, bluetooth module one or more.

Portable digital voltmeter the most according to claim 1, it is characterised in that the monitoring device of described Surveillance center is Computer, mobile phone or panel computer.

Portable digital voltmeter the most according to claim 1, it is characterised in that described display screen be LED display or Person's LCD display.

Portable digital voltmeter the most according to claim 1, it is characterised in that set on the sidewall of described voltmeter shell Alarm device, described alarm device is had to be connected with described single-chip microcomputer；Described alarm device is acoustic-optic alarm.

Portable digital voltmeter the most according to claim 1, it is characterised in that described voltmeter shell by rotating shaft with The opening of U-shaped gripper shoe is rotationally connected, and described claw is positioned at the space that described U-shaped gripper shoe is formed；Measuring pen storage is inserted The quantity of mouth is two, and lays respectively in the gap of described claw and described U-shaped gripper shoe.

Portable digital voltmeter the most according to claim 1, it is characterised in that put on the sidewall of described voltmeter shell Loudspeaker, the inside of described voltmeter shell are had to be provided with voice broadcast module, the outfan of described single-chip microcomputer and described voice broadcast Module, loudspeaker connect.