CN211669345U

CN211669345U - Transformer sound stethoscope

Info

Publication number: CN211669345U
Application number: CN201822015613.9U
Authority: CN
Inventors: 何位经; 刘嘉; 周良学; 罗传胜; 李宏士; 陈冲; 谭进忠; 王安润; 林雪辉; 韦湘; 张春花; 陈志杰; 李光生; 熊红德; 李宝锋; 黄勉
Original assignee: Nanning Power Supply Bureau of Guangxi Power Grid Co Ltd
Current assignee: Nanning Power Supply Bureau of Guangxi Power Grid Co Ltd
Priority date: 2018-12-03
Filing date: 2018-12-03
Publication date: 2020-10-13
Anticipated expiration: 2028-12-03

Abstract

The utility model discloses a transformer sound auscultation appearance, it is including the sound collection module, sound telecommunication conversion module, signal conditioning module and the DSP treater that connect gradually, display and bee calling organ are connected to the output of DSP treater, and the keypad is connected to the input of DSP treater, and the DSP treater still is equipped with PC connection port and SD joint mouth, sound collection module is including hugging closely the earphone of transformer outer wall, and sound collection module is used for gathering the sound that the transformer sent.

Description

Transformer sound stethoscope

Technical Field

The utility model relates to a detect the instrument, specifically a transformer sound auscultation appearance.

Background

When a charging test is performed after a new production or overhaul of the transformer, or a fault exists inside the transformer, generally, it is preliminarily diagnosed whether the fault exists inside the transformer by listening to the operation sound of the transformer. According to the method, the ears or ears are attached to the wall of the transformer box by means of other metal objects to hear the fault sound, so that similar fault sounds such as buzzing, gurgling, scratching, cutting, biting, sand, a chler and the like of the transformer cannot be accurately identified, the fault misjudgment of the transformer is caused, or the diagnosis of the transformer is delayed, and the fault treatment of the transformer is influenced. Therefore, accurate transformer sound identification research is imperative.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem that a transformer sound auscultation appearance is provided, can avoid adopting the human ear to directly answer another transformer sound and receive the environmental disturbance big, listen not unsafe problem, can improve the degree of accuracy level of transformer sound trouble greatly.

The utility model discloses solve above-mentioned technical problem with following technical scheme:

the utility model discloses transformer sound auscultation appearance, including sound collection module, sound telecommunication conversion module, signal conditioning module and the DSP treater that connects gradually, display and bee calling organ are connected to the output of DSP treater, and the keypad is connected to the input of DSP treater, and the DSP treater still is equipped with PC connection port and SD joint mouth, sound collection module includes the earphone of adsorbable transformer tank wall, and sound collection module is used for gathering the sound that the transformer sent.

The DSP processor adopts TMS320F28335 chip.

Adopt the utility model discloses whether detect the transformer unusual, can avoid using the ear direct listening other transformer sound to receive the environmental disturbance big, listen other inaccurate, the utility model discloses can improve the degree of accuracy level of transformer sound trouble greatly.

Drawings

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

Fig. 2 is a circuit diagram of the signal conditioning module of fig. 1.

Detailed Description

As shown in fig. 1, the utility model discloses transformer sound auscultation appearance is including the sound collection module 7 that connects gradually, sound telecommunication conversion module 6, signal conditioning module 5 and DSP treater 4, display 1 and bee calling organ 2 are connected to DSP treater 4's output, keyboard 8 is connected to DSP treater 4's input, DSP treater 4 still is equipped with PC connection port 9 and SD joint mouth 3, sound collection module 7 includes the earphone of conical loudspeaker form, sound collection module 7 is used for gathering the sound that the transformer sent.

The DSP processor comprises 1 TMS320F28335 chip, 1 74HC04 chip, 74HC32D chip, SST39VF800A70-4C-EKE chip, 1 IS61LV25616AL chip, PS767D301 chip, 74HC08D chip, and adopts 6 layers of PCB process to make and can effectively avoid the electric signal interference.

Signal conditioning module 5 adopts prior art, and its circuit structure can adopt like the circuit structure shown in fig. 2 in the device of the utility model, sound signal forms the form output of voltage through the conversion of adapter. Since the DSP only receives positive 0-3V signals. Therefore, the voltage must be limited to 0-3V, otherwise, the problem of burning out the A/D module of the DSP will occur, in order to ensure that the voltage signal input to the DSP is safe, the signal is conditioned by the LM324 operational amplifier of TI company, the first stage operational amplifier circuit of the signal conditioning circuit is formed by a difference circuit, the second stage operational amplifier circuit is formed by a summation circuit, and the third stage is formed by an inverting proportional amplifier.

The utility model discloses transformer sound auscultation appearance device, precision earphone through sound collection module 7 carries out transformer case sound collection, and filter the noise, then enlarge the audio frequency through sound telecommunication conversion module 6, the audio frequency after enlargies changes the audio frequency waveform into with sound through signal conditioning module 5, the audio frequency waveform that obtains through DSP treater 4 at last confirms the fault type with the comparison of benchmark waveform, and show fault information through display 1, accessible bee calling organ 2 reports to the police and suggests simultaneously, can also pass through the SD card with fault information and save, upload information through the PC link, carry out remote monitoring.

Claims

1. Transformer sound auscultator, its characterized in that, it is including the sound collection module, sound telecommunication conversion module, signal conditioning module and the DSP treater that connect gradually, display and bee calling organ are connected to the output of DSP treater, and the keyboard is connected to the input of DSP treater, and the DSP treater still is equipped with PC connection port and SD joint interface, sound collection module is including hugging closely the earphone of transformer outer wall, and sound collection module is used for gathering the sound that the transformer sent.

2. The transformer sound stethoscope of claim 1, wherein said DSP processor is implemented using a TMS320F28335 chip.