CN211554159U - Low-voltage branch line platform area identification instrument - Google Patents

Abstract

The utility model discloses a low-voltage branch line platform area identifier, which belongs to the field of power distribution detection products, and comprises an acquisition end, a divider resistance sampling circuit, a data processor, a power circuit, a singlechip, a signal lamp, a keying circuit, a USB interface and a GPRS communication module, wherein the acquisition end and the divider resistance sampling circuit are respectively connected with the data processor; the data processor and the power circuit are respectively connected with the single chip microcomputer; the key circuit, the signal lamp and the USB interface are respectively connected with the singlechip; and the GPRS communication module is connected with the USB interface. The utility model relates to a rationally, simple structure, firm stability can detect many circuits simultaneously, does not receive the influence of detection circuitry, improves measurement personnel's work efficiency greatly.

Description

Low-voltage branch line platform area identification instrument

Technical Field

The utility model relates to a low pressure branch line platform district discernment appearance belongs to distribution detection product field.

Background

In recent years, in order to achieve marketing fine management and achieve the purposes of reducing consumption and reducing loss, a power grid company often needs to collect more user data of various transformer areas, including transformer area information and phase information of a user meter, so that new requirements are provided for a low-voltage centralized meter reading system.

The existing transformer area identification instrument has signal interference and errors in actual detection through a method of coupling current signals, inaccurate detection and wrong judgment exist when the current transformer area identification instrument passes through a plurality of switches and nodes, and misjudgment is brought to the detection process due to the fact that the existing current comparison identification instrument has asynchronous time.

SUMMERY OF THE UTILITY MODEL

According to the deficiency in the above prior art, the utility model discloses the problem that solves is: the pressure branch line platform area identification instrument is reasonable in design, simple in structure, firm and stable, and can solve the problems.

The utility model provides a technical scheme that its technical problem adopted is: the utility model provides a low-voltage branch line platform area identifier, which comprises an acquisition end, a divider resistance sampling circuit, a data processor, a power circuit, a singlechip, a signal lamp, a key circuit, a USB interface and a GPRS communication module, wherein the acquisition end and the divider resistance sampling circuit are respectively connected with the data processor; the data processor and the power circuit are respectively connected with the single chip microcomputer; the key circuit, the signal lamp and the USB interface are respectively connected with the singlechip; and the GPRS communication module is connected with the USB interface.

As a preferred scheme, the acquisition end detects current signals of an electric load to be detected, the acquisition end comprises two stages of current transformers, wherein the first stage is an 200/5A pincerlike transformer, the pincerlike transformer sends acquired signals into the second stage which is a 5/25MA secondary transformer, and the data processor acquires signals of the secondary transformer for processing.

As a preferred scheme, the data processor comprises an AD sampling chip and a DSP module which are connected in sequence; and the acquisition end sends the current signal to an AD sampling chip of the data processor.

As a preferable scheme, the voltage-dividing resistance sampling circuit detects a voltage-dividing resistance signal of the electric load to be detected, and sends the voltage-dividing resistance signal to an AD sampling chip of the data processor.

As a preferred scheme, the AD sampling chip collects input waveforms of a current signal and a divider resistance signal, performs analog-to-digital conversion on the input waveforms of the current signal and the divider resistance signal, and sends the converted input waveforms to the DSP module; the DSP module outputs a data processing result to the single chip microcomputer after the received current signal after analog-to-digital conversion and the divider resistance signal are subjected to Fourier transform, dynamic tracking and root mean square value operation in sequence.

As a preferable scheme, the single chip microcomputer detects according to a received data processing result and transmits the detection result to a server through a GPRS network, and the server displays data on the mobile phone client.

The utility model discloses the beneficial effect who has is:

the utility model discloses small convenient to carry, can detect many circuits simultaneously, do not receive the influence of detection circuitry, improve measurement personnel's work efficiency greatly, the port voltage that adopts GPRS chip (AIR202) is 1.8V, consequently, receive and send the IO mouth at the serial ports and adopt two triodes to carry out the matching of voltage, the GPRS chip is responsible for networking and information transfer, and is simple and convenient, adopt pincerlike mutual-inductor measuring current convenient and fast, not being limited to the environment of locating, adopt the mode of app transmission to acquire data, convenience and swift degree have been brought.

Drawings

FIG. 1 is a schematic view of the structural connection of the present invention;

fig. 2 is a minimum system diagram of the GPRS chip of the present invention;

FIG. 3 is a diagram illustrating an implementation process of the present invention;

Detailed Description

Example 1:

referring to the attached drawings of the specification, the utility model discloses a low pressure branch line platform district identification appearance, including collection end, divider resistance sampling circuit, data processor, power supply circuit, singlechip, signal lamp, keying circuit, USB interface and GPRS communication module, collection end and divider resistance sampling circuit link to each other with data processor respectively; the data processor and the power circuit are respectively connected with the single chip microcomputer; the key circuit, the signal lamp and the USB interface are respectively connected with the singlechip; and the GPRS communication module is connected with the USB interface.

As a preferred scheme, the acquisition end detects current signals of an electric load to be detected, the acquisition end comprises two stages of current transformers, wherein the first stage is an 200/5A pincerlike transformer, the pincerlike transformer sends acquired signals into the second stage which is a 5/25MA secondary transformer, and the data processor acquires signals of the secondary transformer for processing.

As a preferred scheme, the data processor comprises an AD sampling chip and a DSP module which are connected in sequence; and the acquisition end sends the current signal to an AD sampling chip of the data processor.

As a preferable scheme, the voltage-dividing resistance sampling circuit detects a voltage-dividing resistance signal of the electric load to be detected, and sends the voltage-dividing resistance signal to an AD sampling chip of the data processor.

As a preferred scheme, the AD sampling chip collects input waveforms of a current signal and a divider resistance signal, performs analog-to-digital conversion on the input waveforms of the current signal and the divider resistance signal, and sends the converted input waveforms to the DSP module; the DSP module outputs a data processing result to the single chip microcomputer after the received current signal after analog-to-digital conversion and the divider resistance signal are subjected to Fourier transform, dynamic tracking and root mean square value operation in sequence.

As a preferable scheme, the single chip microcomputer detects according to a received data processing result and transmits the detection result to a server through a GPRS network, and the server displays data on the mobile phone client.

The utility model discloses mainly utilize the principle that same moment electric current on same root wire equals to come as detection standard, this method does not receive the restriction of detection circuitry can detect many circuits simultaneously, can improve detection efficiency greatly. When in operation, the open pincerlike mutual inductor is directly clamped on a tested circuit, so that the operation is safe and convenient. Meanwhile, the volume is small, and the carrying is convenient.

Use the utility model discloses small convenient to carry can detect many circuits simultaneously, does not receive the influence of detection circuitry, improves measurement personnel's work efficiency greatly.

The utility model discloses divide into the collection end and handle the end, it is mutual that the collection end divide into the two-stage, and the first order is 200/5A second grade for 5/25ma, and the information that the processing end gathered second grade mutual-inductor is calculated and is handled, obtains the actual electric current of gathering. And then sent to the background over the 2G network.

The using method comprises the following steps:

(1) firstly, turning on a power switch;

(2) when the signal lamp begins to flash rapidly, the equipment is proved to start working;

(3) placing a current clamp on a wire to be detected, and collecting a current signal;

(4) acquiring and converting through two-stage mutual inductance adc, and then calculating actual current according to a proportional relation;

(5) sending the obtained actual current to a server through a serial port, and displaying data on an APP by the server;

(6) the user looks up the obtained signal through the mobile phone APP.

The utility model discloses make small convenient to carry, can detect many circuits simultaneously, do not receive the influence of detection circuitry, improve measurement personnel's work efficiency greatly, the port voltage that adopts GPRS chip (AIR202) is 1.8V, consequently, receive and send the IO mouth at the serial ports and adopt two triodes to carry out the matching of voltage, the AIR202 chip is responsible for networking and information transfer, and is simple and convenient, adopt pincerlike mutual-inductor to detect electric current convenient and fast, not be in the place environment of locating, adopt the mode acquisition data of app transmission, convenience and swiftness have been brought.

The control chip adopts an STM32 series single chip microcomputer, the GPRS chip for remote transmission and control adopts an AIR202 module, the AIR202 module is a four-frequency-band GSM/GPRS module, an RDA8955 platform is adopted, a 32Mb NorFlash +32Mb SRAM is built in, and three development modes such as a Lua script development mode, an AT command development mode and a C language SDK development mode are supported.

The Air202 has rich peripheral interfaces, supports various interfaces such as UART, SPI, I2C and the like, can support 16 GPIOs at most, supports ADC and audio input and output functions, and meets the use requirements of various application scenes.

The Air202 module adopts a power saving technology, and the current power consumption is as low as 1.14mA in the sleep mode DRX-5. The voltage of the AIR202 port is 1.8V, so that two triodes are adopted to match the voltage at the receiving and sending I/O ports of the serial port, and the AIR202 is responsible for networking and information transmission, and is simple and convenient.

The above only is the embodiment of the present invention, not limiting the patent scope of the present invention, all the equivalent structures or equivalent processes that are used in the specification and the attached drawings or directly or indirectly applied to other related technical fields are included in the patent protection scope of the present invention.

Claims (6)

1. The low-voltage branch line station area identifier is characterized by comprising an acquisition end, a divider resistor sampling circuit, a data processor, a power circuit, a single chip microcomputer, a signal lamp, a key circuit, a USB interface and a GPRS communication module, wherein the acquisition end and the divider resistor sampling circuit are respectively connected with the data processor; the data processor and the power circuit are respectively connected with the single chip microcomputer; the key circuit, the signal lamp and the USB interface are respectively connected with the singlechip; and the GPRS communication module is connected with the USB interface.

2. The low-voltage branch line station area identifier according to claim 1, wherein the collection terminal detects a current signal of an electric load to be detected, the collection terminal comprises a two-stage current transformer, the first stage is an 200/5A pincerlike transformer, the pincerlike transformer sends the collected signal to a second stage which is a 5/25MA secondary transformer, and the data processor collects the signal of the secondary transformer for processing.

3. The low-voltage branch line station area identifier according to claim 1, wherein the data processor comprises an AD sampling chip and a DSP module which are connected in sequence; and the acquisition end sends the current signal to an AD sampling chip of the data processor.

4. The apparatus as claimed in claim 3, wherein the divider resistance sampling circuit detects a divider resistance signal of the electric load to be detected and sends the divider resistance signal to the AD sampling chip of the data processor.

5. The identification instrument for the transformer area of the low-voltage branch line according to claim 3, wherein the AD sampling chip collects input waveforms of a current signal and a divider resistance signal, performs analog-to-digital conversion on the input waveforms of the current signal and the divider resistance signal, and sends the converted input waveforms to the DSP module; the DSP module outputs a data processing result to the single chip microcomputer after the received current signal after analog-to-digital conversion and the divider resistance signal are subjected to Fourier transform, dynamic tracking and root mean square value operation in sequence.

6. The low-voltage branch line station area identifier according to claim 1, wherein the single chip microcomputer detects according to a received data processing result and transmits the detection result to a server through a GPRS network, and the server displays data on a mobile phone client.

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