CN213069003U

CN213069003U - Self-powered wireless acquisition device for detecting power current of electric equipment

Info

Publication number: CN213069003U
Application number: CN202021999987.XU
Authority: CN
Inventors: 余刃; 谢旭阳; 彭俏
Original assignee: Naval University of Engineering PLA
Current assignee: Naval University of Engineering PLA
Priority date: 2020-09-14
Filing date: 2020-09-14
Publication date: 2021-04-27
Anticipated expiration: 2030-09-14

Abstract

The utility model discloses a self-power wireless collection system for electric equipment power current detects, including current transformer and main part equipment, main part equipment includes signal acquisition and control circuit, wireless data transceiver circuit and supply circuit, current transformer links to each other with signal acquisition and control circuit and supply circuit's input respectively, signal acquisition and control circuit and wireless data transceiver circuit's power input end links to each other with supply circuit respectively, signal acquisition and control circuit's output links to each other with wireless data transceiver circuit's input signal end. The utility model discloses need not the external power supply for gather electric equipment power current data and wireless transmission, so that through amplitude, frequency and the phase place of monitoring motor power current waveform, analysis motor running state and abnormal conditions, can the wide application in electric equipment running state monitoring and protection field.

Description

Self-powered wireless acquisition device for detecting power current of electric equipment

Technical Field

The utility model relates to an electrical equipment running state monitoring and protection field especially relate to a self-power wireless collection system for electrical equipment power current detects.

Background

At present, two monitoring means are mainly provided in the field, one is a mutual inductor and transmitter scheme which is mainly used for monitoring the change condition of a current effective value of a medium-high power motor, and the scheme is usually used for collecting an interphase current effective value and is used for overcurrent protection of the motor; the other scheme is a scheme of a mutual inductor, a collector and an analysis system, and can obtain the change conditions of the amplitude, the frequency and the phase of the power current of the equipment, so that the running health condition and the change of the equipment can be obtained.

The prior art has the following disadvantages: the device in the scheme 1 is simple and convenient to install, but the monitored information amount is small, and the device is mainly used for overcurrent protection of motor equipment; the scheme 2 has abundant monitoring information and can be used for analyzing the running health condition of equipment, but the monitoring equipment is relatively complex, signal cables need to be laid, and the field popularization and implementation are not convenient.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming above-mentioned background art not enough, provide a self-power wireless collection system for electric equipment power current detects, make it be used for gathering electric equipment power current data to current characteristic parameter data or original waveform data are uploaded to wireless network communication's mode, through amplitude, frequency and the phase change of monitoring motor power current waveform, obtain motor running state and abnormal conditions.

The utility model provides a pair of a self-power wireless collection system for electric equipment power current detects, including current transformer and main part equipment, main part equipment includes signal acquisition and control circuit, wireless data transceiver circuit and supply circuit, current transformer links to each other with signal acquisition and control circuit and supply circuit's input respectively, signal acquisition and control circuit and wireless data transceiver circuit's power input end links to each other with supply circuit respectively, signal acquisition and control circuit link to each other with wireless data transceiver circuit's input signal end.

In the above technical solution, the power supply circuit is composed of a power management module and a rechargeable battery electrically connected to each other.

In the above technical solution, the wireless data transceiver circuit adopts a zigbee (also called zigbee, which is a wireless network protocol for low-speed short-distance transmission, and the bottom layer is a medium access layer and a physical layer that adopt ieee802.15.4 standard specification) communication module.

In the technical scheme, the current transformer is connected with the main body equipment through a plug.

In the technical scheme, the bottom of the main body equipment is provided with a strong magnet.

In the above technical scheme, the current transformer is a pincerlike transformer.

The utility model is used for self-power wireless collection system that electric equipment power current detected has following beneficial effect:

1. the equipment self-powered technology obtains electric energy from a power cable through the induction of the pincerlike mutual inductor and charges a rechargeable battery of the equipment, so that the equipment does not need an external power supply, and permanent self-powering and maintenance-free are realized.

2. The installation mode is as follows: the clamp type mutual inductor signal sensing and magnetic type main body module fixing device breaks through the limitation of inconvenient field installation due to the self-powered technology, the arrangement of equipment measuring points can be realized at any part where a power cable passes through, a power cable and a signal cable do not need to be laid for a sensor, and the convenience in installation and use is greatly improved.

3. Intelligent control of signal acquisition and power management. The high-performance embedded controller realizes switching of the device among working modes such as data acquisition, charging, dormancy and the like according to control requirements, and realizes high-performance acquisition and wireless transmission of current signals of the electric equipment on the premise of low power consumption.

Drawings

Fig. 1 is a schematic structural view of a self-powered wireless acquisition device for detecting power current of an electric device according to the present invention;

fig. 2 is a schematic connection diagram of the self-powered wireless collection device for detecting power current of the electric device according to the present invention.

Fig. 3 is a schematic view of the working process of the self-powered wireless collection device for detecting the power current of the electric device of the present invention.

Detailed Description

The present invention will be described in further detail with reference to the following drawings and examples, but the examples should not be construed as limiting the present invention.

Referring to fig. 1, the utility model discloses a self-power wireless collection system for electrical equipment power current detects, including current transformer 1 and main body equipment 2, main body equipment 2 includes signal acquisition and control circuit 21, wireless data transceiver circuit 22 and supply circuit 23, current transformer 1 links to each other with signal acquisition and control circuit 21 and supply circuit 23's input respectively, signal acquisition and control circuit 21 and wireless data transceiver circuit 22's power input end links to each other with supply circuit 23 respectively, signal acquisition and control circuit 21 link to each other with wireless data transceiver circuit 22's signal end.

The power supply circuit 23 is composed of a power management module and a rechargeable battery electrically connected to each other.

The wireless data transceiver circuit 22 employs a zigbee communication module.

The current transformer 1 is connected with the main body equipment 2 through a plug.

The bottom of the main body device 2 is provided with a strong magnet.

The current transformer 1 is a pincer-shaped transformer.

Referring to fig. 2 and 3, the utility model discloses a self-power wireless collection system for electrodynamic machine power current detects.

The work flow in practical application is as follows:

step 1: starting the electric equipment;

step 2: the self-powered wireless acquisition device automatically detects whether the battery is in short of electricity, and if the battery is in short of electricity, a charging mode is started to charge the battery;

and step 3: if the battery is not under-charged, detecting whether the timing acquisition time is up. If the timing acquisition time is not up, the signal acquisition and control circuit 21 and the wireless data transceiver circuit 22 enter a sleep mode. Returning to the step 2;

and 4, step 4: if the timing acquisition time is up, the acquisition function of the signal acquisition and control circuit 21 is started to acquire data;

and 5: and performing data processing, calculating a current characteristic value, and judging the state of the electric equipment. If the current characteristic value is normal, the current characteristic value is sent through the wireless data transceiver circuit 22; if it deviates from the normal state, the current original waveform data is transmitted through the wireless data transceiver circuit 22. And after the transmission is finished, returning to the step 2.

In this embodiment, current transformer 1 is independent part, sets up in the outside of main part equipment 2, and current transformer 1 can clamp on the power cable of electrical equipment, and simple to operate accomplishes two kinds of functions of device current signal pickup and induction electricity-taking simultaneously.

The signal acquisition and control circuit 21 is composed of a signal conditioning and amplifying circuit, an AD converter and a high-performance embedded controller, and can synchronously complete the conditioning, amplifying and acquiring work of the power current waveforms of the three channels. The high-performance embedded controller realizes the control of the acquisition process, can analyze and process the data, and provides the engineering technicians for further analysis through the signal data of the wireless transmission force current of the wireless data transceiver circuit. The signal acquisition and control circuit 21 sends the acquired power current data to the wireless data transceiver circuit 22, and the wireless data transceiver circuit 22 sends the received upper computer instruction data to the signal acquisition and control circuit 21.

The wireless data transceiver circuit 22 adopts a zigbee communication module with low power consumption, so that the equipment nodes are flexibly networked, and after multiple pieces of equipment are networked, the running states of a plurality of pieces of motor equipment can be monitored and analyzed in real time.

The power supply circuit 23 performs self-power management of the main apparatus 2. The part consists of a power management module and a rechargeable battery. The power management module is mainly used for conditioning and collecting the electric signals transmitted back by the current transformer 1 and storing electric energy in the rechargeable battery so as to meet the power requirements of each module of the equipment.

In the embodiment, structurally, the current transformer 1 is an independent part and is connected with the main body device 2 through a plug; the signal acquisition and control circuit 21, the wireless data transceiver circuit 22 and the power supply circuit 23 are integrated together to form the main body device 2, and 3 paths of mutual inductors can be connected at most simultaneously to realize three paths of current signal acquisition. The bottom of the main body device 2 is provided with a strong magnetic attraction which can be absorbed on an iron plane near a monitoring point. The on-site arrangement is convenient, power supply and signal cables do not need to be laid, and the signal sensing and the electric energy pickup can be realized by clamping the current transformer 1 on a power cable; main part equipment 2 adsorb near iron plane can, need not to insert the power supply, accessible mutual-inductor realizes permanent power supply with inside battery cooperation.

It will be apparent to those skilled in the art that various changes and modifications may be made without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims and their equivalents, the present invention is also intended to include such modifications and variations.

Those not described in detail in this specification are within the skill of the art.

Claims

1. A self-powered wireless collection device for detecting power current of electric equipment is characterized in that: including current transformer (1) and main part equipment (2), main part equipment (2) include signal acquisition and control circuit (21), wireless data transceiver circuit (22) and supply circuit (23), current transformer (1) links to each other with signal acquisition and control circuit (21) and supply circuit (23)'s input respectively, the power input end of signal acquisition and control circuit (21) and wireless data transceiver circuit (22) links to each other with supply circuit (23) respectively, the output of signal acquisition and control circuit (21) links to each other with the input signal end of wireless data transceiver circuit (22).

2. A self-powered wireless pick-up device for power current detection of electrically powered equipment as claimed in claim 1, wherein: the power supply circuit (23) is composed of a power supply management module and a rechargeable battery which are electrically connected with each other.

3. A self-powered wireless pick-up device for power current detection of electrically powered equipment as claimed in claim 2, wherein: the wireless data transceiver circuit (22) adopts a zigbee communication module.

4. A self-powered wireless pick-up device for power current detection of electrically powered equipment as claimed in claim 3, wherein: the current transformer (1) is connected with the main body equipment (2) through a plug.

5. A self-powered wireless pick-up device for power current detection of electrically powered equipment as claimed in claim 4, wherein: the bottom of the main body device (2) is provided with a strong magnet.

6. A self-powered wireless pick-up device for power current detection of electrically powered equipment as claimed in claim 5, wherein: the current transformer (1) is a pincerlike transformer.