CN214585694U

CN214585694U - Portable electric quantity measuring device

Info

Publication number: CN214585694U
Application number: CN202023100200.4U
Authority: CN
Inventors: 杨晓华; 巴挺杰; 赵永辉; 杨昊; 刘兴龙; 杨茗; 张益鸣; 杨子阳
Original assignee: Yunnan Power Grid Co Ltd
Current assignee: Yunnan Power Grid Co Ltd
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-11-02
Anticipated expiration: 2030-12-21

Abstract

The utility model discloses a portable electric quantity measuring device relates to intelligent instrument technical field. The measuring device comprises a shell and a measuring module arranged in the shell, wherein a keyboard and a display screen are arranged on the surface of the shell, and a plurality of pincerlike sensors are arranged on the side wall of the shell; the measuring module comprises a voltage input circuit, a current input circuit, an electric quantity data acquisition module, a microprocessor, a memory, a communication interface and a power supply module, wherein the electric quantity data acquisition module adopts an ADE7763 chip, and the microprocessor adopts a TMS320C54x chip. External data acquisition, measurement and parameter calculation such as real-time power and active power, reactive power, power factor are realized through chip ADE7763, and ADE7763 is equipped with special ADC and fixed function DSP, can keep high accuracy characteristic for a long time under the great environmental condition of change. The ability to speed data processing and coordinate data communications between the various functional blocks is achieved through the use of a high performance microprocessor TMS320C54x chip.

Description

Portable electric quantity measuring device

Technical Field

The utility model relates to an intelligent instrument and meter technical field, concretely relates to portable electric quantity measuring device.

Background

With the continuous development and progress of scientific technology, the phenomenon of electricity stealing which is frequently forbidden gradually develops to the high-tech field in recent years, which brings great challenges to the electricity stealing prevention monitoring work. At present, electricity stealing prevention work mainly depends on the field of workers to check, the great dependence on the experience of the workers usually invests a large amount of manpower and material resources, and the effect is not ideal. The electricity consumption data needs to be subjected to statistical analysis in the checking work, the level of the currently used measuring instrument is relatively backward, the hardware in the instrument is backward, the measuring precision is poor, and the data processing and transmission speed is slow, so that the whole checking period is long and the working efficiency is low.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a portable electric quantity measuring device solves the problem that current measuring instrument measurement accuracy is poor, data processing and transmission speed are slow.

In order to solve the technical problem, the utility model adopts the following technical scheme: a portable electric quantity measuring device is characterized in that: the device comprises a shell and a measuring module arranged in the shell, wherein a keyboard and a display screen are arranged on the surface of the shell, and a plurality of pincerlike sensors are arranged on the side wall of the shell; the measuring module comprises a voltage input circuit, a current input circuit, an electric quantity data acquisition module, a microprocessor, a memory, a communication interface and a power supply module, wherein the voltage input circuit and the current input circuit are respectively in signal connection with the electric quantity data acquisition module, and the keyboard, the display screen, the electric quantity data acquisition module, the memory, the communication interface and the power supply module are respectively in signal connection with the microprocessor; the electric quantity data acquisition module adopts an ADE7763 chip, and the microprocessor adopts a TMS320C54x chip.

The clamp-shaped sensor comprises a clamp-shaped clamp and a lead, the clamp-shaped clamp is positioned outside the shell, one end of the lead is connected with the clamp-shaped clamp, and the other end of the lead is fixed inside the shell through a coil spring and is respectively connected with the voltage input circuit and the current input circuit.

The further technical scheme is that the number of the voltage clamp-on sensors and the number of the current clamp-on sensors are respectively 3.

The further technical scheme is that the voltage input circuit is composed of a voltage divider, a sample holder and an A/D converter which are connected in sequence, and the current input circuit is composed of a current-voltage converter, a sample holder and an A/D converter which are connected in sequence.

The further technical proposal is that the memory comprises an RAM internal memory, a ROM read-only memory and an E2PROM read-only memory.

The further technical scheme is that the communication interface adopts a TL16C550C interface.

The working principle is as follows: when the clamp is used, the corresponding number of clamp-shaped sensors are selected according to the requirements of single phase and three phase, the clamp clamps are pulled out to be clamped on a wire to be tested, and the measuring device is started through a keyboard. The acquired current signals are converted into voltage signals by a current-voltage converter, amplified by a sampling holder and transmitted to an ADE7763 chip by an A/D converter; the collected voltage signal is amplified by the sampling holder after being processed by the voltage divider, and then is transmitted to an ADE7763 chip by the A/D converter. The ADE7763 chip transmits the current and voltage signals of the same path to the TMS320C54x chip for processing, and then displays the signals on a display screen, so that the signals are convenient for workers to read, and meanwhile, the data are stored in a memory. After the detection is finished, the clamp is taken down, and the wire connected with the clamp is rolled into the shell under the action of the coil spring, so that the wire is convenient to arrange and store, and the measuring device is convenient to use.

Compared with the prior art, the beneficial effects of the utility model are that:

1. external data acquisition, measurement and parameter calculation such as real-time power and active power, reactive power, power factor are realized through chip ADE7763, and ADE7763 is equipped with special ADC and fixed function DSP, can keep high accuracy characteristic for a long time under the great environmental condition of change.

2. The TMS320C54x chip of the high-performance microprocessor has an advanced multi-bus structure and high operation speed, and can achieve the functions of accelerating the data processing speed and coordinating the data communication among all functional blocks.

3. The voltage pincerlike sensor and the current pincerlike sensor are respectively provided with 3, so that a circuit is not required to be interrupted during measurement, and the three-phase three-wire system three-meter method, the three-phase three-wire system three-meter method and the three-phase four-wire system can be satisfied, so that the measuring device is wide in application range.

4. Various storage requirements of various forms are met through various storages, and the storage capacity is large; the TL16C550C interface is used for realizing communication between the measuring device and an upper computer, so that data can be conveniently extracted and analyzed, and the measuring device can be conveniently upgraded.

Drawings

Fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic block diagram of the measuring module of the present invention.

In the figure: the device comprises a shell 1, a keyboard 2, a display screen 3, a clamp-shaped sensor 4, a voltage input circuit 5, a current input circuit 6, an electric quantity data acquisition module 7, a microprocessor 8, a memory 9, a communication interface 10 and a power supply module 11.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

Fig. 1 shows a portable electric quantity measuring device, which comprises a casing 1 and a measuring module arranged in the casing 1, wherein a keyboard 2 and a display screen 3 are arranged on the surface of the casing 1, and a plurality of clamp-shaped sensors 4 are arranged on the side wall of the casing 1.

As shown in fig. 2, the measuring module includes a voltage input circuit 5, a current input circuit 6, an electric quantity data acquisition module 7, a microprocessor 8, a memory 9, a communication interface 10 and a power module 11, the voltage input circuit 5 and the current input circuit 6 are respectively in signal connection with the electric quantity data acquisition module 7, and the keyboard 2, the display screen 3, the electric quantity data acquisition module 7, the memory 9, the communication interface 10 and the power module 11 are respectively in signal connection with the microprocessor 8; the electric quantity data acquisition module 7 adopts an ADE7763 chip, and the microprocessor 8 adopts a TMS320C54x chip. The memory 9 comprises a RAM internal memory, a ROM read-only memory and an E2PROM read-only memory. The communication interface adopts TL16C550C interface.

The clamp-on sensor 4 comprises a voltage clamp-on sensor and a current clamp-on sensor, the clamp-on sensor 4 comprises a clamp-on clamp and a lead, the clamp-on clamp is located outside the shell 1, one end of the lead is connected with the clamp-on clamp, and the other end of the lead is fixed inside the shell 1 through a coil spring and is respectively connected with the voltage input circuit 5 and the current input circuit 6. The voltage pincerlike sensor and the current pincerlike sensor are respectively provided with 3.

The voltage input circuit 5 is composed of a voltage divider, a sample holder and an A/D converter which are connected in sequence, and the current input circuit 6 is composed of a current-voltage converter, a sample holder and an A/D converter which are connected in sequence.

When the device is used, the corresponding number of the pincer-shaped sensors 4 is selected according to the requirements of single phase and three phase, the pincer-shaped clamps are pulled out to be clamped on a wire to be tested, and the measuring device is started through the keyboard 2. The acquired current signals are converted into voltage signals by a current-voltage converter, amplified by a sampling holder and transmitted to an ADE7763 chip by an A/D converter; the collected voltage signal is amplified by the sampling holder after being processed by the voltage divider, and then is transmitted to an ADE7763 chip by the A/D converter. The ADE7763 chip transmits current and voltage signals of the same wire to be tested to the TMS320C54x chip for processing, displays the signals on the display screen 3, facilitates reading of workers, and stores data in the memory 9. The display part comprises 3 display windows, and the display type is 7-segment LED. After the detection is finished, the clamp is taken down, and the wire connected with the clamp is rolled into the shell 1 under the action of the coil spring, so that the wire is convenient to arrange and store, and the measuring device is convenient to use. And the communication between the measuring device and an upper computer is realized through a TL16C550C interface.

Although the invention has been described herein with reference to a number of illustrative embodiments thereof, it should be understood that numerous other modifications and embodiments can be devised by those skilled in the art that will fall within the spirit and scope of the principles of this invention. More particularly, various variations and modifications are possible in the component parts and/or arrangements within the scope of the disclosure, the drawings and the appended claims. In addition to variations and modifications in the component parts and/or arrangements, other uses will also be apparent to those skilled in the art.

Claims

1. A portable electric quantity measuring device is characterized in that: the device comprises a shell (1) and a measuring module arranged in the shell (1), wherein a keyboard (2) and a display screen (3) are arranged on the surface of the shell (1), and a plurality of pincerlike sensors (4) are arranged on the side wall of the shell (1); the measuring module comprises a voltage input circuit (5), a current input circuit (6), an electric quantity data acquisition module (7), a microprocessor (8), a memory (9), a communication interface (10) and a power supply module (11), wherein the voltage input circuit (5) and the current input circuit (6) are respectively in signal connection with the electric quantity data acquisition module (7), and a keyboard (2), a display screen (3), the electric quantity data acquisition module (7), the memory (9), the communication interface (10) and the power supply module (11) are respectively in signal connection with the microprocessor (8); the electric quantity data acquisition module (7) adopts an ADE7763 chip, and the microprocessor (8) adopts a TMS320C54x chip.

2. The portable electrical quantity measuring device of claim 1, wherein: the clamp-on sensor (4) comprises a voltage clamp-on sensor and a current clamp-on sensor, the clamp-on sensor (4) is composed of a clamp and a lead, the clamp is located outside the shell (1), one end of the lead is connected with the clamp, and the other end of the lead is fixed inside the shell (1) through a coil spring and is respectively connected with the voltage input circuit (5) and the current input circuit (6).

3. A portable electrical quantity measuring device according to claim 2, characterized in that: the voltage pincerlike sensor and the current pincerlike sensor are respectively provided with 3.

4. The portable electrical quantity measuring device of claim 1, wherein: the voltage input circuit (5) is composed of a voltage divider, a sample holder and an A/D converter which are connected in sequence, and the current input circuit (6) is composed of a current-voltage converter, a sample holder and an A/D converter which are connected in sequence.

5. The portable electrical quantity measuring device of claim 1, wherein: the memory (9) comprises a RAM internal memory, a ROM read-only memory and an E2PROM read-only memory.

6. The portable electrical quantity measuring device of claim 1, wherein: the communication interface adopts TL16C550C interface.