A noise detection device

Abstract

This utility model provides a noise detection device, including: a base, a steering wheel, and a noise detection module. The noise detection module is disposed on the steering wheel, which is rotatably disposed on the base to complete noise detection from 0 to 360°. The noise detection module includes two noise sensors, an operational amplifier, an analog-to-digital converter, a control unit, and a first switching circuit. The output terminal of the operational amplifier is connected to the input terminal of the analog-to-digital converter, and the output terminal of the analog-to-digital converter is connected to the input terminal of the control unit. The inverting input terminal of the operational amplifier is grounded through the first switching circuit, which is also connected to a reference voltage Vref. The first switching circuit has two input ports, input1 and input2, connected to the first switching circuit. The output terminals of the two noise sensors are connected to the two input ports input1 and input2 of the first switching circuit, so that the signals detected by the noise sensors are transmitted to the control unit sequentially through the first switching circuit, the operational amplifier, and the analog-to-digital converter.

Description

Technical Field

[0001] This utility model relates to the field of noise detection technology, specifically a noise detection device with adjustable detection angle, reduced environmental interference, and easy mobility. Background Technology

[0002] Noise is one of the sources of fault diagnosis signals. With the development of large-scale equipment and the increasing demand for intelligent, low-maintenance, and noise-reducing technologies, real-time vibration and noise monitoring of large equipment can effectively provide real-time information on its health status. Based on these signals, some fault predictions can be made in advance, facilitating subsequent equipment maintenance and replacement. Currently, according to a search of domestic and international patents and papers, this field is still emerging, and relevant patents are relatively limited.

[0003] Noise in some areas exhibits directional characteristics, and the device cannot adjust its angle, potentially missing data acquisition from key sound source directions. Furthermore, existing noise detection equipment typically uses a single noise sensor; if this sensor malfunctions, noise information for a given period will be lost. Utility Model Content

[0004] The purpose of this invention is to provide a noise detection device that can monitor, analyze, and transmit data in real time, while enabling multi-directional noise detection and allowing the noise sensor to switch quickly between dual channels.

[0005] The technical solution adopted in this utility model is as follows:

[0006] A noise detection device, comprising:

[0007] The system comprises a base, a steering wheel, and a noise detection module. The noise detection module is mounted on the steering wheel, which is rotatably mounted on the base to perform noise detection from 0 to 360°. The noise detection module includes two noise sensors, an operational amplifier, an analog-to-digital converter (ADC), a control unit, and a first switching circuit. The output of the operational amplifier is connected to the input of the ADC, and the output of the ADC is connected to the input of the control unit. The inverting input of the operational amplifier is grounded through the first switching circuit, which is also connected to a reference voltage Vref and has two input ports, input1 and input2, connected to the first switching circuit. The outputs of the two noise sensors are connected to the two input ports input1 and input2 of the first switching circuit, allowing the signals detected by the noise sensors to be transmitted sequentially through the first switching circuit, the operational amplifier, and the ADC to the control unit.

[0008] In one embodiment, the noise detection module further includes a power supply module, which is connected to the noise sensor, operational amplifier, analog-to-digital converter, control unit and first switching circuit respectively.

[0009] In one embodiment, the base is equipped with a motor, the output end of which is fixedly connected to the steering wheel to drive the steering wheel to deflect 0-360°.

[0010] In one embodiment, the noise detection module further includes a wireless transmission unit connected to the control unit, which is used to send noise information to an external device.

[0011] In one embodiment, the first switching circuit is a CD4051 chip.

[0012] In one embodiment, the control unit may also be connected to a power device for noise detection. When the control unit detects that the noise of the power device exceeds a threshold, the control unit shuts down the power device to wait for the anomaly to be detected.

[0013] Due to the adoption of the above technical solution, the beneficial effects of this utility model include: by using a motor-driven rotating shaft structure, the noise detection sensor can rotate with the steering wheel, adjusting the angle to achieve multi-directional detection, realizing multi-angle detection with a single device. The noise detection device amplifies the noise signal through an operational amplifier → digitizes the signal through an analog-to-digital converter → processes and controls it through a control unit. Combined with the flexible configuration of the two noise sensors in the first switching circuit with dual channels, it achieves accurate acquisition, processing, and application of environmental noise, and can be widely used in industrial noise monitoring, environmental noise assessment, acoustic experiments, and other scenarios. Attached Figure Description

[0014] To more clearly illustrate the technical solutions in the embodiments of this utility model, the following accompanying drawings are provided:

[0015] Figure 1 This is a schematic diagram of the noise detection device of this utility model.

[0016] Figure 2 This is a schematic diagram of the noise module.

[0017] The markings in the diagram are: 01-Operational amplifier; 02-Analog-to-digital converter; 03-Control unit; 04-First switching circuit; 10-Noise detection module; 20-Steering wheel; 30-Base; 31-Motor. Detailed Implementation

[0018] To make the objectives, technical solutions, and beneficial effects of this utility model clearer, the present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present utility model and are not intended to limit the scope of the present utility model.

[0019] For ease of description, spatial relative terms will be used where necessary. It should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0020] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified. In this application, unless otherwise explicitly specified and limited, the terms "installed," "connected," "joined," "fixed," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0021] Unless otherwise specified, the terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention pertains, and are to be understood as having the meaning consistent with the meaning in the context of the related art, and should not be interpreted in an idealized or over-formalized manner, except as expressly defined in this invention.

[0022] Reference Figure 1-2A noise detection device includes: a base 30, a steering wheel 20, and a noise detection module 10. The noise detection module is mounted on the steering wheel, which is rotatably mounted on the base to perform noise detection from 0 to 360°. The noise detection module includes two noise sensors, an operational amplifier, an analog-to-digital converter (ADC), a control unit, and a first switching circuit. The output of the operational amplifier is connected to the input of the ADC, and the output of the ADC is connected to the input of the control unit. The inverting input of the operational amplifier is grounded through the first switching circuit, which is also connected to a reference voltage Vref and has two input ports, input1 and input2, connected to the first switching circuit. The outputs of the two noise sensors are connected to the two input ports input1 and input2 of the first switching circuit, so that the signals detected by the noise sensors are transmitted sequentially through the first switching circuit, the operational amplifier, and the ADC to the control unit. The operational amplifier can be an LM741, the ADC can be an EV10AS940, and the control unit can be a PLC controller. Without limitation, the first switching circuit, operational amplifier, analog-to-digital converter and control unit can all use commercially available components and equipment.

[0023] In one embodiment, the noise detection module further includes a power supply module (not shown in the figure), which is connected to the noise sensor, operational amplifier, analog-to-digital converter, control unit and first switching circuit respectively.

[0024] In one embodiment, a motor 31 is provided inside the base, and the output end of the motor is fixedly connected to the steering wheel to drive the steering wheel to deflect 0-360°. The base is fixed to the monitoring area by fasteners, and the motor leads out a power line to connect to an external power source. After power is turned on, the motor drives the steering wheel to rotate, thereby driving the noise detection module to perform multi-directional detection.

[0025] In one embodiment, two noise sensors, an operational amplifier, an analog-to-digital converter, a control unit, and a first switching circuit are integrated within the housing of the noise detection module 10. The noise sensors collect external noise through through-holes in the housing and are arranged near the through-holes. The integration of these components is a prior art technique and will not be described in detail here.

[0026] In one embodiment, the noise detection module further includes a wireless transmission unit connected to the control unit, which transmits noise information to an external device. The external device can be a terminal, such as a mobile phone or computer.

[0027] In one embodiment, the first switching circuit is a CD4051 chip.

[0028] In one embodiment, a noise detection device is used to detect noise from electrical equipment. The control unit can also be connected to the electrical equipment for noise detection. When the control unit detects that the noise from the electrical equipment exceeds a threshold, the control unit shuts down the electrical equipment to wait for the operator to detect the anomaly.

[0029] This noise detection device uses operational amplifier 01 to acquire and amplify noise signals. As the core amplification component, the operational amplifier features high open-loop gain, high input impedance, and low output impedance, enabling it to amplify weak noise signals (such as electrical signals generated by sound wave vibrations) to a level that subsequent circuits can process. The noise signal is input to the operational amplifier's input terminal via input1 or input2, achieving signal "pickup." The operational amplifier then linearly amplifies the input signal through internal circuitry (such as differential amplification and negative feedback), increasing signal strength and providing a foundation for subsequent analog-to-digital conversion.

[0030] The amplified analog noise signal is converted into a digital signal by the analog-to-digital converter 02, realizing the "analog to digital" information format conversion. Conversion logic: The analog-to-digital converter quantizes the continuously changing analog voltage / current signal into a binary digital signal according to a preset precision (such as 12 bits or 16 bits) for easy processing by digital circuits; Transmission logic: The digital signal is transmitted to the control unit 03 through the circuit bus (or dedicated interface), completing the "digitization" and "transmission" of the signal.

[0031] The control unit (such as a microcontroller or microprocessor) is the "brain" of the device, responsible for signal processing, function control, and data output. It performs filtering, calibration, and decibel calculations on digital noise signals to eliminate environmental interference and output standardized noise data. Through the first switching circuit 04, it achieves signal path switching (e.g., selecting input1 or input2 as the detection channel), dynamic adjustment of the reference voltage Vref (optimizing detection accuracy), or triggering the start / stop logic for noise detection. The processed noise data is output to the display, storage, or communication modules to meet monitoring, recording, and remote transmission requirements. The first switching circuit 04 plays a core role in the system by selecting and switching multiple signals. It has dual input ports (input1 / input2), supports multiple signal inputs, directly connects to the inverting input of the operational amplifier to process analog signals, and simultaneously connects to the reference voltage Vref and ground to achieve signal path switching.

[0032] The above description of the embodiments is provided to enable those skilled in the art to understand and use the present invention. It will be apparent to those skilled in the art that various modifications can be easily made to these embodiments, and the general principles described herein can be applied to other embodiments without inventive effort. Therefore, the present invention is not limited to the above embodiments, and any improvements and modifications made by those skilled in the art based on the disclosure of the present invention without departing from the scope of the present invention should be within the protection scope of the present invention.

Claims

1. A noise detection apparatus, characterized by comprising: include: The system comprises a base, a steering wheel, and a noise detection module. The noise detection module is mounted on the steering wheel, which is rotatably mounted on the base to perform noise detection from 0 to 360°. The noise detection module includes two noise sensors, an operational amplifier, an analog-to-digital converter (ADC), a control unit, and a first switching circuit. The output of the operational amplifier is connected to the input of the ADC, and the output of the ADC is connected to the input of the control unit. The inverting input of the operational amplifier is grounded through the first switching circuit, which is also connected to a reference voltage Vref and has two input ports, input1 and input2, connected to the first switching circuit. The outputs of the two noise sensors are connected to the two input ports input1 and input2 of the first switching circuit, allowing the signals detected by the noise sensors to be transmitted sequentially through the first switching circuit, the operational amplifier, and the ADC to the control unit.

2. The noise detection apparatus according to claim 1, characterized by The noise detection module also includes a power supply module, which is connected to the noise sensor, operational amplifier, analog-to-digital converter, control unit and first switching circuit respectively.

3. The noise detection apparatus according to claim 1, characterized by The base contains a motor, and the output end of the motor is fixedly connected to the steering wheel to drive the steering wheel to deflect 0-360°.

4. The noise detection apparatus according to claim 1, characterized by The noise detection module also includes a wireless transmission unit, which is connected to the control unit and is used to send noise information to external devices.

5. The noise detection apparatus according to claim 1, characterized by The first switching circuit is a CD4051 chip.

6. The noise detection apparatus of claim 1, wherein The control unit can also be connected to the power equipment for noise detection. When the control unit detects that the noise of the power equipment exceeds a threshold, the control unit shuts down the power equipment to wait for the abnormality to be detected.

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