CN202008400U - Noise detecting system of speed reduction clutch - Google Patents

Abstract

The utility model discloses a noise detection system for a deceleration clutch, which comprises a main control module, a display module and a data acquisition card, the main control module is connected with the data acquisition card, and the input end of the data acquisition card is connected with A washing noise signal acquisition unit and a dehydration noise signal acquisition unit. Due to the adoption of the above structure, the utility model has the following advantages: 1. Based on a single industrial control computer, a unified integrated interface is used to display the data collected by multi-channel sensors, and the vibration and noise waveform diagram is drawn in real time, and animation is used to cooperate with the instructions on the production line The operating status of each station. In terms of human-computer interaction, it has certain convenience and aesthetics; 2. Realize the automatic judgment of the product quality of the deceleration clutch, organically integrate the automatic detection and fault diagnosis, and improve the intelligence of the detection platform.

Description

A Noise Detection System for Reduction Clutch

technical field

The utility model relates to the technical field of deceleration clutches, in particular to a noise detection system of a deceleration clutch.

Background technique

At present, there are many deceleration clutch fault detection methods, which can be roughly divided into: vibration method, noise method and temperature method. Among them, the vibration method is the most widely used. It monitors the vibration signal of the deceleration clutch through the vibration sensor installed in the deceleration clutch seat or the appropriate position of the box, and analyzes and processes the signal to judge the deceleration clutch working condition and fault. Fault detection by vibration method can be divided into time detection method and frequency detection method. The current relatively mature detection parameters in the time detection method are: peak value, effective value, crest factor, kurtosis and pulse factor. The representative detection items in the frequency analysis method include: synchronous equalization, logarithmic cepstrum, adjustable frequency analysis method, high frequency resonance analysis method and short-term signal processing. At present, most of the deceleration clutch fault detection systems developed and produced at home and abroad are designed according to the principle of vibration method.

The measurement of vibration can be expressed mathematically by speed and acceleration. In the early 1980s, the national deceleration clutch industry developed two types of deceleration clutch vibration testers: acceleration type and speed type. Since the frequency response of the speed sensor reaches 15KHz, it basically covers the vibration spectrum range of the deceleration clutch, so it is widely used. The frequency response range of the accelerometer sensor itself can be greater than 15KHz, but because springs and vibration transmission rods are often added to form a sensing system during use, its frequency response is often lower than 6KHz, which cannot cover all the vibration frequencies of the deceleration clutch. , but this kind of sensor is simple, not easy to damage, and it is used more in practice.

At present, several deceleration clutch vibration testers commonly used in China mainly have the following deficiencies in detecting noise:

1. Multiple detection data are completed by multiple computers, and the data of each computer cannot be automatically summarized. Workers are labor intensive. An operator needs to test about 1,000 deceleration clutches under the working condition of 8 hours a day. It is completed within 30 seconds, which is very labor-intensive and prone to misjudgment.

2. The method of judging the failure of the deceleration clutch is to judge the abnormal sound through the operator using earphones, which is relatively backward. It needs to be pointed out that due to the high labor intensity of the workers and the uneven overall quality, plus the fact that the workers judge the quality of the deceleration clutch by listening to the abnormal sound, these factors add up to determine the quality of the deceleration clutch. No high guarantees can be given.

Utility model content

The technical problem to be solved by the utility model is to provide a noise detection system for a deceleration clutch that automatically detects noise and alarms when a failure occurs, aiming at the shortcomings of the prior art.

In order to solve the above-mentioned technical problems, the technical proposal of the present utility model is: a noise detection system for a deceleration clutch, including a main control module, a display module, and a data acquisition card, the main control module is connected with the data acquisition card, and the The input end of the data acquisition card is connected with a washing noise signal acquisition unit and a dehydration noise signal acquisition unit.

Both the washing noise signal acquisition unit and the dehydration noise signal acquisition unit use vibration sensors, and are respectively hoisted above the washing noise and dehydration noise detection stations at the end of the deceleration clutch assembly production line.

The main control module adopts an industrial control computer.

The display module includes a display and a large LCD display.

The input end of the main control module is connected with a keyboard input module and a barcode scanning gun.

The input end of the data acquisition card is connected with a PLC controller.

The output terminals of the main control module are respectively connected with a printer and a fault indicator light.

The utility model adopts the above-mentioned structure and has the following advantages: 1. Based on a single industrial control computer, a unified integrated interface is used to display the data collected by multi-channel sensors, and to draw vibration and noise waveform diagrams in real time, and to use animation to cooperate with instructions for each on the production line. The operating status of the station point. In terms of human-computer interaction, it has certain convenience and aesthetics; 2. Realize the automatic judgment of the product quality of the deceleration clutch, organically integrate the automatic detection and fault diagnosis, and improve the intelligence of the detection platform.

Description of drawings

Below in conjunction with accompanying drawing and specific embodiment the utility model is described in further detail;

Fig. 1 is a logical structural block diagram of the utility model;

In Fig. 1, 1. Main control module; 2. Display; 3. Data acquisition card; 5. Fault indicator light; 6. Large LCD display; 7. Dehydration noise signal acquisition unit; 8. Washing noise signal acquisition unit.

Detailed ways

As shown in Figure 1, a deceleration clutch noise detection system includes a main control module 1, a display 2, and a data acquisition card 3, and the data acquisition card 3 is a PCI-1710L data acquisition card. The main control module 1 is connected with the data acquisition card 3, and the input end of the data acquisition card 3 is connected with a washing noise signal acquisition unit 8 and a dehydration noise signal acquisition unit 7. Both the washing noise signal acquisition unit 8 and the dehydration noise signal acquisition unit 7 adopt vibration sensors, and are respectively hoisted above the washing noise and dehydration noise detection stations at the end of the deceleration clutch assembly production line. The main control module 1 adopts an industrial control computer. The display module includes a display 2 and a large LCD display 6 . The input end of the main control module 1 is connected with a keyboard input module and a barcode scanner. Data can be entered through the keyboard input module. The input end of the data acquisition card 3 is connected with a PLC controller, so as to realize the synchronous operation and stop of the production line of the deceleration clutch and the acquisition and cooperation of the braking torque signal of the deceleration clutch. The output terminals of the main control module 1 are respectively connected with a printer and a fault indicator light 5 . After the vibration sensor collects the fault signal of the No. 2 station point, it is transmitted to the data acquisition card 3, and the data acquisition card transmits the signal to the main control module, and the main control module outputs the control fault indicator light 5 after signal processing, and displays The module is displayed.

Noise detection includes washing noise and dehydration noise. Both washing noise and dehydration noise belong to the category of vibration noise. The detection test of vibration noise can use vibration displacement sensor, vibration speed sensor, vibration acceleration sensor or non-contact electromagnetic displacement sensor to detect vibration noise and require output of continuous data for subsequent output in real time continuous noise waveform. The vibration displacement sensor has a simple structure and low cost, but has a narrow frequency response range and is difficult to detect certain high-frequency abnormal sounds. Vibration speed sensors and vibration acceleration sensors have high precision and moderate frequency response range, but they are relatively large in size and output low-frequency natural frequencies. The non-contact electromagnetic displacement sensor has high measurement accuracy, wide frequency response range, non-contact with the workpiece, and easy installation, but it is costly and susceptible to electromagnetic interference, especially in industrial sites. Therefore, through the vibration and noise detection experiment, the sensor with relatively good detection effect is selected, and combined with the advantages of multi-resolution analysis of the wavelet transform algorithm, the abnormal noise in the unqualified deceleration clutch is detected.

The system finally selects the vibration velocity sensor to detect the vibration noise. The output of the vibration velocity sensor will be accompanied by the inherent low frequency signal. When designing the amplifier circuit, a post high-pass filter is added to solve the problem.

The utility model has been exemplarily described above in conjunction with the accompanying drawings. Obviously, the specific implementation of the utility model is not limited by the above methods, as long as the various improvements of the technical solution of the utility model are adopted, or directly applied to other applications without improvement. Occasions, all within the protection scope of the present utility model.

Claims (7)

1. the noise measuring system of a speed-reducing clutch, it is characterized in that: comprise main control module (1), display module (2), data collecting card (3), described main control module (1) is connected with data collecting card (3), and the input end of described data collecting card (3) is connected with washing noise signal collecting unit (8) and dehydration noise signal collecting unit (7).

2. the noise measuring system of a kind of speed-reducing clutch according to claim 1, it is characterized in that: described washing noise signal collecting unit (8) and dehydration noise signal collecting unit (7) all adopt vibration transducer, are lifted on the washing noise and the dehydration noise measuring station top of speed-reducing clutch assembling line end respectively.

3. the noise measuring system of a kind of speed-reducing clutch according to claim 1 is characterized in that: described main control module (1) employing industrial control computer.

4. the noise measuring system of a kind of speed-reducing clutch according to claim 1 is characterized in that: described display module (2) comprises display and big LCD display.

5. the noise measuring system of a kind of speed-reducing clutch according to claim 1, it is characterized in that: the input end of described main control module (1) is connected with keyboard load module and bar code scan rifle.

6. the noise measuring system of a kind of speed-reducing clutch according to claim 1, it is characterized in that: the input end of described data collecting card (3) is connected with the PLC controller.

7. the noise measuring system of a kind of speed-reducing clutch according to claim 1, it is characterized in that: the output terminal of described main control module (1) is connected with printer and malfunction indicator lamp (5) respectively.

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