阅读说明：本技术 变压器铁芯接地带就地显示传感器 (Transformer core grounding band shows sensor on the spot ) 是由 宋青帅 王鸣江 于 2019-09-27 设计创作，主要内容包括：本发明公开了一种变压器铁芯接地带就地显示传感器,包括依次连接的单片机、A/D采样模块、传感器、数码管、驱动电路和数字信号处理器,还包括连接盒体和通讯模块,单片机分别连接数字信号处理器和通讯模块,单片机、A/D采样模块、传感器、驱动电路、数字信号处理器和通讯模块位于连接盒体内,连接盒体为矩形体,数码管设于连接盒体的前端面。本发明可对变压器铁芯接地电流及夹件接地电流实时监测,抗干扰能力强,可方便采集,监测数据通过通讯传输到后台,结合后台分析实现在线监测及故障报警的同时拥有就地显示的功能,给现场的工作人员创造更便捷的故障排查环境；模块化设计,体积紧凑,安装灵活,利于调试,使用安全可靠。(The invention discloses a kind of transformer core grounding bands to show sensor on the spot, including sequentially connected single-chip microcontroller, A/D sampling module, sensor, charactron, driving circuit and digital signal processor, it further include connection box body and communication module, single-chip microcontroller is separately connected digital signal processor and communication module, single-chip microcontroller, A/D sampling module, sensor, driving circuit, digital signal processor and communication module are located in connection box body, connection box body is cuboid, and charactron is set to the front end face of connection box body.The present invention can be to transformer iron core grounding current and clamp earthing current real-time monitoring, strong antijamming capability, acquisition can be facilitated, monitoring data pass through communication transfer to backstage, possess the function of showing on the spot while realizing on-line monitoring and fault alarm in conjunction with background analysis, creates more convenient and fast malfunction elimination environment to the staff at scene；Modularized design, volume compact is flexible for installation, is conducive to debugging, safe and reliable.)

1. a kind of transformer core grounding band shows sensor on the spot, which is characterized in that including sequentially connected single-chip microcontroller, A/D Sampling module, sensor, charactron, driving circuit and digital signal processor further include connecting box body and communication module, described Single-chip microcontroller is separately connected the digital signal processor and the communication module, the single-chip microcontroller, the A/D sampling module, institute Sensor, the driving circuit, the digital signal processor and the communication module is stated to be located in the connection box body, it is described Connection box body is cuboid, and the charactron is set to the front end face of the connection box body.

2. transformer core grounding band as described in claim 1 shows sensor on the spot, which is characterized in that the connection box body Left side and right side have connection stomidium that is opposite and setting, and the left side of the connection box body is equipped with connector.

3. transformer core grounding band as described in claim 1 shows sensor on the spot, which is characterized in that the connection box body The edge of front end face is equipped with assembly frame.

4. transformer core grounding band as described in claim 1 shows sensor on the spot, which is characterized in that the cross of the charactron Cross-sectional sizes are consistent with the connection front end face size of box body.

Technical field

The invention belongs to sensor attachment tool structure, the iron core grounding current for power industry power transformer is monitored Field, and in particular to a kind of transformer core grounding band shows sensor on the spot.

Background technique

When electrical transformer cores two o'clock or multipoint earthing, circulation can be generated in core interior, causes hot-spot, seriously When will cause iron core localized burn, or even ground strip is made to fuse, leads to iron core electric potential floating, generate discharging fault, serious prestige Strain depressor reliability service, therefore in the operation of the transformer, energy real-time monitoring transformer core and clamp earthing current are aobvious It obtains most important.Conventional method, which uses, is similar to the descriptions such as CN107247172A, CN107219381A and CN109387684A Hand-held clamp on amperemeter measures earth current, the disadvantage is that being easy to be interfered by power frequency magnetic field, and cannot be to ground connection electricity Stream is accomplished real time on-line monitoring and is shown on the spot.Existing monitoring device unreasonable structural design, installation and debugging are inconvenient.

Summary of the invention

In view of this, the object of the present invention is to provide a kind of transformer core grounding bands to show sensor on the spot, to solve Deficiency in the prior art.

In order to achieve the above object, the purpose of the present invention is be achieved through the following technical solutions:

A kind of transformer core grounding band is provided and shows sensor on the spot, wherein including sequentially connected single-chip microcontroller, A/D Sampling module, sensor, charactron, driving circuit and digital signal processor further include connecting box body and communication module, described Single-chip microcontroller is separately connected the digital signal processor and the communication module, the single-chip microcontroller, the A/D sampling module, institute Sensor, the driving circuit, the digital signal processor and the communication module is stated to be located in the connection box body, it is described Connection box body is cuboid, and the charactron is set to the front end face of the connection box body.

Above-mentioned transformer core grounding band shows sensor on the spot, wherein the left side and right side of the connection box body The left side of the connection stomidium set with opposite, the connection box body is equipped with connector.

Above-mentioned transformer core grounding band shows sensor on the spot, wherein the edge of the front end face of the connection box body Equipped with assembly frame.

Above-mentioned transformer core grounding band shows sensor on the spot, wherein the cross section size of the charactron with it is described The front end face size for connecting box body is consistent.

The beneficial effect of technical solution of the present invention is:

-- it can be to transformer iron core grounding current and clamp earthing current real-time monitoring, strong antijamming capability, signal output For standard 4-20mA analog current signal, acquisition can be facilitated, monitoring data are by communication transfer to backstage, in conjunction with background analysis reality Now on-line monitoring and fault alarm while, possess the function of showing on the spot, create more convenient and fast failure to the staff at scene Check environment；

-- use modularized design, can according to different demands using generic connectivity box and show on the spot connect box connected It connects；

-- volume compact, it is flexible for installation, it is conducive to debugging, it is safe and reliable.

Detailed description of the invention

Fig. 1 a, Fig. 1 b and Fig. 1 c are respectively perspective view of the invention, bottom view and rearview；

Fig. 2 is the internal schematic diagram of the present invention.

Specific embodiment

The present invention will be further explained below with reference to the attached drawings and specific examples, but not as the limitation of the invention.

Referring to shown in Fig. 1 a, Fig. 1 b, Fig. 1 c and Fig. 2, transformer core grounding band of the present invention shows that sensor includes on the spot Sequentially connected single-chip microcontroller 1, A/D sampling module 2, sensor 3, charactron 4, driving circuit 5 and digital signal processor 6, also Digital signal processor 6 and communication module 8, single-chip microcontroller 1, A/ are separately connected including connection box body 7 and communication module 8, single-chip microcontroller 1 D sampling module 2, sensor 3, driving circuit 5, digital signal processor 6 and communication module 8 are located in connection box body 7, connect box Body 7 is cuboid, and charactron 4 is set to the front end face of connection box body 7.The left side and right side for connecting box body 7 have it is opposite and If connection stomidium 9, connection box body 7 left side be equipped with connector 10.The edge for connecting the front end face of box body 7 is equipped with dress With frame 11.In a preferred approach, the cross section size of charactron 4 is consistent with the connection front end face size of box body 7.

In use, iron core grounding to be shown to sensor sleeve loaded on transformer core grounding line or copper bar, makes iron core on the spot Ground line or copper bar pass through sensor, are then fixed on transformer base sensor with the screw of four M6X12, use boat Empty connector connects the reserved jack in iron core grounding sensor, while it is (+/- to be equipped with the high performance electric power supply of bipolar output Both 12VDC or +/- 15VDC all can) be sensor power.It is exported, and can facilitated using the 4-20mA analog current of standard Other acquisition devices are accessed, so that convenient interconnect with various communication interfaces.

Analog signal is switched to digital signal by measurement sensor, passes to A/ through overmodulated circuit, filter circuit, amplifying circuit D converter carries out the conversion of analog signal, converts digital signal for the analog signal received and is sent to single-chip microcontroller 1, single-chip microcontroller 1 Obtained signal is sent to digital signal processor 6 (DSP) and carries out digital filtering, FFT calculating, frequency analysis etc., and will most Whole sampled data, analysis result upload to the display of charactron 4 by driving circuit 5 and complete sampled measurements.

The above is only preferred embodiments of the present invention, are not intended to limit the implementation manners and the protection scope of the present invention, right For those skilled in the art, it should can appreciate that and all replace with being equal made by description of the invention and diagramatic content It changes and obviously changes obtained scheme, should all be included within the scope of the present invention.