TWM560015U - Noise detection system - Google Patents

Abstract

An abnormal sound detecting system comprising an audio sensing group, an indicating table, a control box and an image display device, wherein the audio sensing group is mounted on a carbon brush chamber; the indicating system and the sound sense The test group is connected to display the frequency of the sound detected by the audio sensing group; the control box is connected to the audio sensing group. When the carbon brush of the carbon brush room is worn to generate an abnormal sound frequency between the carbon brush and the slip ring, the audio sensing group sends the abnormal sound frequency to the indicator display, and the abnormal sound is converted into the sound by the control box. The current signal is displayed through the image display device. In addition, the alarm sound can be further set by the image display device. When an abnormal sound is detected, the image display device emits a high frequency sound to warn the user to go to the carbon brush room for maintenance.

Description

Abnormal sound detection system

An abnormal sound detecting system, especially an abnormal sound detecting system used in a sintering factory.

In the sintering plant, there are a plurality of carbon brush chambers for operation, the carbon brush chambers are rotated by the motor, and the carbon brushes in the carbon brush chambers are also rotated, when the carbon brushes are used in rotation. Loss due to frictional collision with the corresponding slip ring, or the carbon brushes fall off the axis, so that the copper parts in the carbon brushes are exposed and rubbed against the slip ring, making the wear more serious. . At the current sintering plant, the relevant detection device is not installed to detect whether the carbon brush is in use or not. When the user finds that the carbon brush is worn, the carbon brush and the slip ring are often severely worn and even have to be replaced. The cost is increased; even worse, when the degree of wear is quite serious, it is more likely to cause failure or even damage to the entire machine, which is not conducive to the operation of the entire production line.

In view of the above problems in the sintering plant at present, this creation proposes an abnormal sound detection system to provide an effective detection method for the wear situation of the carbon brush chamber.

In order to achieve the above objectives, the present invention has an abnormal sound detection system comprising:

An audio sensing group is mounted on a carbon brush chamber for detecting a sound frequency generated by the carbon brush chamber during operation, and converting the generated sound frequency into an audio frequency signal;

An indication table coupled to the audio sensing group for receiving the audio signal and displaying the measured sound frequency;

a control box is connected to the audio sensing group, and after receiving the audio signal, the control box converts the audio signal into a current signal;

An image display device is connected to the control box for receiving the current signal and displaying the detected audio data; wherein the image display device further has an alarm when the audio sensing group The alarm emits a high-frequency sound when an abnormality occurs in the detected sound.

With the audio sensing group, the high frequency sound caused by the carbon brush wear of the carbon brush chamber can be detected, and an alarm message is issued in time. The audio sensing group further adopts a capacitive audio sensing component, so that when the abnormal sound generated by the carbon brush chamber is detected, the sensitivity and accuracy can be more accurate, and the capacitive audio sensing component is less likely. Due to the influence of temperature and dust, it can still operate normally in the environment of the sintering plant without being disturbed by the environment. In addition, the image display device can be placed in a control room so that the user can pass through the control room. When the image display device immediately views the carbon brush chambers, if an abnormality occurs in the carbon brush chamber, in addition to displaying the audio frequency generated by the current carbon brush on the image display device, the degree of abnormality is immediately determined, and the image display can also be performed through the image display. The device is set to generate a warning tone, allowing the user to immediately find an abnormal condition, and can go to the scene as soon as possible to perform obstacle removal.

Referring to FIG. 1 , the original sound detection system includes an audio sensing group 10 , an indication table 20 , a control box 30 , and an image display device 41 .

In this embodiment, the audio sensing group 10 has two audio sensors 11 , which may be capacitive audio sensing components, having two partitions, when the audio sensor 11 receives When the sound is vibrated, the sound vibration will cause the diaphragm to vibrate, so that the voltage values of the two partitions are different, and a voltage difference is generated between the two partitions, and the induced current generated by the voltage difference is amplified by the amplifier to receive the sound. It also provides power for operation through an external power supply. It has high sensitivity and is not affected by temperature and dust. It can still operate normally in a sintering plant with high ambient temperature and high suspended particles. The two audio sensors 11 are respectively placed on opposite outer surfaces of a carbon brush chamber 90. When the carbon brushes in the carbon brush chamber 90 are worn due to long-term rotation, the copper portion in the carbon brush and the corresponding slip ring Direct friction, a high-frequency sound is generated during the friction process; in addition, when the carbon brush in the carbon brush chamber 90 is loosened, it will also rub against the slip ring, and the high-frequency sound will also be generated. The audio sensor 11 receives the high frequency sound generated by the friction and converts it into an audio frequency signal. In this embodiment, the audio sensor 11 can detect the volume of 0 to 200 db, and the two audio signals are sensed. The device 11 is preferably a sensor of the same specification, ensuring that the high frequency sound values received by the two audio sensors 11 are identical.

When the audio sensor 11 receives the abnormal high frequency sound, the abnormal high frequency sound is converted into the audio signal and transmitted to the indication table 20, and the indication table 20 displays the high frequency sound. The frequency of the indicator 20 has two sets of seven-segment displays for respectively displaying the sound frequencies measured by the respective audio sensors 11.

When the abnormal high frequency sound is generated, the audio sensor 11 detects the high frequency sound, and transmits the converted audio signal to the control box 30, and the control box 30 includes a control module. 31. In this embodiment, the control module 31 is a single chip module. After receiving the audio signal, the control module 31 converts the audio signal into a current signal, wherein the size of the current signal can be adjusted through the control module 31, and the current signal ranges from 4 to 20 milliamps. .

The image display device 41 can be disposed in a control room 40 and includes a graphic control software. The image display device 41 is connected to the control box 30. The control box 30 transmits the current signal to the image display device 41. The image display device 41 can display the current on the screen with images or data. The sound data contained in the signal. In addition, in the normal operation of the carbon brush in the carbon brush chamber 90, the user can collect the sound of the carbon brush through the audio sensing group 10, and use the image display device 41 to store a reference audio frequency, the reference audio frequency. Representing the sound generated by the carbon brush in an abnormal situation, and setting the reference sound level and the high frequency sound level in the image display device 41, when the carbon brush in the carbon brush chamber 90 is abnormal When the image display device 41 receives the current signal of the high frequency sound, the image display device 41 displays a warning on the screen of the image display device 41. At the same time, a warning sound is sent through an alarm device, so that the user can find the abnormal situation of the carbon brush chamber 90 in the control room 40 in time, and immediately go to the carbon brush chamber 90 for inspection.

10‧‧‧Audio Sensing Group
11‧‧‧Audio sensor
20‧‧‧Instruction Form
30‧‧‧Control box
31‧‧‧Control Module
40‧‧‧Control room
41‧‧‧Image display device
90‧‧‧carbon brush room

Figure 1: Circuit block diagram of the original sound detection system.

Claims (6)

An abnormal sound detecting system comprising: an audio sensing group mounted on a carbon brush chamber for detecting a sound frequency generated by the carbon brush chamber during operation, and converting the generated sound frequency into An audio signal; an indication table coupled to the audio sensing group for receiving the audio signal and displaying the measured sound frequency; a control box connected to the audio sensing group, the control box receiving After the audio signal, the audio signal is converted into a current signal; an image display device is connected to the control box for receiving the current signal and displaying the detected audio data; wherein the image is displayed The device has an alarm that emits a high frequency sound when an abnormality occurs in the audio detected by the audio sensing group. The audio detecting system of claim 1, wherein the audio sensing group comprises two audio sensors, and the audio sensors are respectively disposed on opposite sides of the carbon brush chamber. The noise detecting system according to claim 2, wherein the two audio sensors are capacitive audio sensing components and have the same specifications and models. For the abnormal sound detection system described in claim 2 or 3, the sound sensors detect the volume range from 0 to 200 db. According to the abnormal sound detecting system described in claim 1, the current signal is between 4 and 20 milliamperes. For the abnormal sound detecting system described in claims 1 to 3, the control box has a control module, and the control module is a single chip module.