CN216248131U

CN216248131U - Current detection device

Info

Publication number: CN216248131U
Application number: CN202122351863.1U
Authority: CN
Inventors: 张鑫; 卫永鹏; 王宗琳; 裴希华; 关宇; 李睿; 庞海峰; 韦勇; 陈业锐; 赵韦; 宋来顺
Original assignee: State Grid Gansu Electric Power Co Maintenance Co
Current assignee: State Grid Gansu Electric Power Co Maintenance Co
Priority date: 2021-09-27
Filing date: 2021-09-27
Publication date: 2022-04-08
Anticipated expiration: 2031-09-27

Abstract

The utility model provides a current detection device, and belongs to the field of current detection equipment. The device comprises a single chip microcomputer and a power supply module, wherein the power supply module is electrically connected with the single chip microcomputer through a charge-discharge control module, the device further comprises at least one current detection loop, the current detection loop comprises a current transformer and a current processing unit, the input end of the current transformer is connected with the output end of a current input device, and the output end of the current transformer is electrically connected with the single chip microcomputer through the current processing unit. The device is provided with a plurality of current detection loops, and a precise current transformer is selected to measure a plurality of current ranges.

Description

Current detection device

Technical Field

The utility model belongs to the field of current detection equipment, and particularly relates to a current detection device.

Background

At present, in the production and use processes of various electronic devices or components, the amount of current change carried by the component has become an important parameter for determining the performance of the component. The traditional current detection method mainly depends on a current meter and utilizes a manual operation mode to carry out intermittent acquisition, has the defects of non-real time, missing detection, false detection and the like, and particularly has the defects that some special working conditions are not beneficial to on-site manual measurement, so the traditional current detection method cannot meet the requirements of the development of the current production technology.

The current in the lines of power generation, transformation, transmission, distribution and utilization is very different, from several amperes to several tens of thousands of amperes. In order to convert the current into a more uniform current for measurement, protection and control, the voltage on the line is generally higher, and direct measurement is very dangerous. The current transformer plays the role of current transformation and electric isolation.

Disclosure of Invention

The utility model aims to provide a current detection device which is provided with a plurality of current detection loops, a precise current transformer is selected to measure a plurality of current ranges, and an acousto-optic alarm function and visual display of current value data are realized in the current detection process.

In order to achieve the above object, the present invention adopts a technical scheme that the current detection device comprises a single chip microcomputer, a power supply module, and at least one current detection loop, wherein the power supply module is electrically connected with the single chip microcomputer through a charge-discharge control module, the current detection loop comprises a current transformer and a current processing unit, an input end of the current transformer is connected with an output end of a current input device, and an output end of the current transformer is electrically connected with the single chip microcomputer through the current processing unit.

Further, in some preferred embodiments of the present invention, the current detection loop is 6.

Further, in some preferred embodiments of the present invention, the current processing unit includes a rectifier bridge and an operational amplifier circuit, and the current transformer is sequentially connected to the rectifier bridge and the operational amplifier circuit.

Further, in some preferred embodiments of the present invention, the current processing unit further includes a first zener diode disposed between the rectifier bridge and the operational amplifier circuit.

Further, in some preferred embodiments of the present invention, the current processing unit further includes a second zener diode, and the second zener diode is disposed between the operational amplifier circuit and the single chip.

Further, in some preferred embodiments of the present invention, the single chip microcomputer is further connected to an alarm module.

Further, in some preferred embodiments of the present invention, the single chip is further connected to a switch, and the switch is respectively connected to the bluetooth module and the display screen.

Preferably, the single chip microcomputer is STM32F03, the alarm module adopts a voice chip BY8310, the Bluetooth module is HC-05, the first voltage stabilizing diode is IN4733, the second voltage stabilizing diode is IN4619, and the current transformer is selected from DL-CT03C0 series, DL-CT08CL series and DL-CT1005A series.

Compared with the prior art, the utility model has the beneficial technical effects that as the technical scheme is adopted: six current detection loops are arranged, and a precise current transformer is selected to measure a plurality of current ranges; the STM32F103 single chip microcomputer can realize various control and communication functions and is provided with a Bluetooth communication function; the current unit is provided with two stages of voltage-regulator tube protection circuit elements, IN4733 is used for preventing the current processing unit from being damaged by overlarge induced current, IN4619 is used for preventing the output of the current processing unit from exceeding the input limit value of the ADC of the single chip microcomputer and burning the IO port of the single chip microcomputer; the low-power voice alarm unit is arranged, so that various sound and light alarm functions can be realized; the high-power lithium battery is equipped, so that the device can run for a long time under the condition of no external power supply.

Drawings

Fig. 1 is a block diagram of a schematic structure of a current detection device according to an embodiment of the present invention;

FIG. 2 is a circuit diagram of one of the current handling units U1A of FIG. 1;

FIG. 3 is a circuit diagram of one of the current handling units U1B of FIG. 1;

FIG. 4 is a circuit diagram of one of the current handling units U3A of FIG. 1;

FIG. 5 is a circuit diagram of one of the current handling units U3B of FIG. 1;

FIG. 6 is a circuit diagram of one of the current handling units U5A of FIG. 1;

FIG. 7 is a circuit diagram of one of the current handling units U5B of FIG. 1;

fig. 8 is a circuit diagram of the voice chip BY8310 of the alarm module in fig. 1;

fig. 9 is a circuit diagram of the chip microcomputer STM32F03 in fig. 1;

FIG. 10 is a circuit diagram of the power module, the Bluetooth module, the switch and the display screen of FIG. 1;

reference numerals: the device comprises a current input device 1, a current transformer 2, a current processing unit 3, a rectifier bridge 4, a first voltage stabilizing diode 5, an operational amplifier circuit 6, a second voltage stabilizing diode 7, a single chip microcomputer 8, an alarm module 9, a charge and discharge control module 10, a power supply module 11, a Bluetooth module 12, a change-over switch 13, a display screen 14 and a mobile phone 15.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is described in further detail below with reference to preferred embodiments.

Example 1

Referring to fig. 1, the present embodiment provides a current detection device, including a single chip microcomputer 8, a power module 11, the power module 11 is electrically connected to the single chip microcomputer 8 through a charge-discharge control module 10, and further including at least one current detection loop, where the current detection loop includes a current transformer 2 and a current processing unit 3, an input end of the current transformer 2 is connected to an output end of the current input device 1, and an output end of the current transformer 2 is electrically connected to the single chip microcomputer 8 through the current processing unit 3; the current processing unit 3 comprises a rectifier bridge 4 and an operational amplifier circuit 6, the current transformer 2 is sequentially connected with the rectifier bridge 4 and the operational amplifier circuit 6, the current processing unit 3 further comprises a first voltage stabilizing diode 5, and the first voltage stabilizing diode 5 is arranged between the rectifier bridge 4 and the operational amplifier circuit 6; the current processing unit 3 further comprises a second voltage stabilizing diode 7, and the second voltage stabilizing diode 7 is arranged between the operational amplification circuit 6 and the singlechip 8; the single chip microcomputer 8 is further connected with an alarm module 9 and a change-over switch 13, and the change-over switch 13 is respectively connected with a Bluetooth module 12 and a display screen 14.

In this embodiment, the current detection loop includes 6 loops.

The current transformer 2 can select sensors with the models of DL-CT03C0 series, DL-CT08CL series, DL-CT1005A series and related series with any coil ratio, and the specific model and specification are determined according to the specification of the current to be detected.

The rectifier bridge 4 is used for converting the alternating current signal sensed by the current transformer 2 into a direct current signal.

The single chip microcomputer 8 is STM32F03, and is used for completing various functions including current detection program, detection algorithm, communication, display and control functions.

The current processing unit 3 is used for converting the current signal into a voltage signal and adjusting the voltage detection range according to the requirement; fig. 2 to 7 correspond to circuit diagrams of one of the current handling units from left to right in fig. 1, respectively.

The operational amplifier circuit 6 is built based on an OPA2604 operational amplifier, and the OPA2604 is a dual FET input, low distortion operational amplifier.

The alarm module 9 is used for sound and light alarm, the adopted voice chip selects BY8310, the chip is provided with a 32MB memory, various trigger modes are provided, the working voltage is 3.6-5V, and a serial port is supported to drive a 3W power amplifier.

The display screen 14 adopts a 32-inch capacitive screen, and can be connected through a USB (universal serial bus) to realize a human-computer interaction function.

The Bluetooth module 12 is HC-05, and the Bluetooth module 12 is connected with a mobile phone 15 provided with a corresponding APP.

The power module 11 is a rechargeable lithium battery equipped with a special charge and discharge control module 10, and can be used for a long time in an environment without external power supply.

The switch 13 is a switch 13 between bluetooth and the display screen 14, and is used for controlling wireless or wired display.

Install the special tall and erect APP of ann of this device of development on cell-phone 15, the function includes that the bluetooth is connected, return circuit current reports to the police, current display, pilot lamp report to the police, audio alert, opens APP and refreshes equipment and can search for near bluetooth equipment, and the equipment that finds current detection device can automatic connection, later can set up interface display content according to the detection demand to set up the alarm mode.

The model of the first voltage-stabilizing diode 5 is IN4733 and is used for preventing the current processing unit 3 from being damaged by overlarge induced current, and the model of the second voltage-stabilizing diode 7 is IN4619 and is used for preventing the output of the circuit processing unit from exceeding the input limit value of the ADC of the single chip microcomputer 8 and burning the IO port of the single chip microcomputer 8.

The working principle of the device of the embodiment is as follows: sense the current detection return circuit with alternating current through current transformer 2, utilize current processing unit 3 to convert current signal into voltage signal, and adjust direct by 8ADC input of singlechip behind the voltage detection range as required and detect, the detection range can reach 1mA-10A through adjusting operation amplifier circuit 6 and selecting suitable current transformer 2, can show the current value through setting for the procedure through display screen 14 and realize the warning through alarm module 9, can external power supply directly, also can realize the power supply through the lithium cell, display screen 14 can the limit line directly link, also can be with bluetooth wireless connection, the bluetooth mode still supports cell-phone 15 directly to link, cell-phone 15APP through special development directly is connected with this device, carry out remote monitoring.

As an improvement on the scheme, a WIFI functional module and an Ethernet functional module can be further arranged, so that the device can be used in a networking mode.

The foregoing is a preferred embodiment of the present invention for the purpose of illustrating the utility model, and it is therefore contemplated that modifications, equivalents and improvements will readily occur to those skilled in the art, which modifications are within the spirit and scope of the utility model.

Claims

1. The utility model provides a current detection device, includes singlechip (8), power module (11), and power module (11) are through charge-discharge control module (10) and singlechip (8) electric connection, its characterized in that: the current detection circuit comprises a current transformer (2) and a current processing unit (3), the input end of the current transformer (2) is connected with the output end of the current input device (1), and the output end of the current transformer (2) is electrically connected with the single chip microcomputer (8) through the current processing unit (3).

2. The current detection device according to claim 1, wherein: the current detection loop is 6.

3. The current detection device according to claim 2, wherein: the current processing unit (3) comprises a rectifier bridge (4) and an operational amplifier circuit (6), and the current transformer (2) is sequentially connected with the rectifier bridge (4) and the operational amplifier circuit (6).

4. The current detection device according to claim 3, wherein: the current processing unit (3) further comprises a first voltage stabilizing diode (5), and the first voltage stabilizing diode (5) is arranged between the rectifier bridge (4) and the operational amplification circuit (6).

5. The current detection device according to claim 4, wherein: the current processing unit (3) further comprises a second voltage stabilizing diode (7), and the second voltage stabilizing diode (7) is arranged between the operational amplification circuit (6) and the single chip microcomputer (8).

6. The current detection device according to claim 5, wherein: the single chip microcomputer (8) is also connected with an alarm module (9).

7. The current detection device according to claim 6, wherein: the single chip microcomputer (8) is further connected with a change-over switch (13), and the change-over switch (13) is respectively connected with a Bluetooth module (12) and a display screen (14).

8. The current detection device according to claim 7, wherein: the type of the single chip microcomputer (8) is STM32F03, the type of a voice chip adopted BY the alarm module (9) is BY8310, the type of the Bluetooth module (12) is HC-05, the type of the first voltage stabilizing diode (5) is IN4733, the type of the second voltage stabilizing diode (7) is IN4619, and the type of the current transformer (2) is selected from DL-CT03C0 series, DL-CT08CL series and DL-CT1005A series.

9. The current detection device according to claim 8, wherein: the Bluetooth module (12) is connected with a mobile phone (15) provided with a corresponding APP.