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Electric control sound production device

A sounding device and electronic control technology, which is applied in the direction of using electrical devices, measuring devices, and electromagnetic means, can solve the problems of inability to analyze high-frequency parts and poor high-frequency reciprocity results, and achieve improved test accuracy and high reliability. Noise ratio, demand reduction effect

Active Publication Date: 2021-10-08
深蓝汽车科技有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Based on pipeline acoustics, the technology of separating incident sound and reflected sound under the one-dimensional assumption will be limited by the cut-off frequency of the pipeline size, and the high-frequency part cannot be analyzed, and the high-frequency reciprocity results are poor

Method used

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  • Electric control sound production device
  • Electric control sound production device
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Embodiment Construction

[0068] refer to figure 1 and figure 2 , an embodiment of the present invention provides an electronically controlled sounding device, comprising:

[0069] AC power supply, transformer B2, switch circuit 3, supercapacitor 5, sounding head 6, hysteresis voltage unlocking circuit 8 and trigger circuit 9;

[0070] When the unlock switch SB2 in the hysteresis voltage unlocking circuit 8 and the trigger switch SB1 in the trigger circuit 9 are both off, if the second operational amplifier IC4 in the hysteresis voltage unlocking circuit 8 outputs a high level And the first operational amplifier IC3 in the trigger circuit 9 outputs a low level, prompting the switch circuit 3 arranged between the AC power supply and the transformer B2 to form a path for charging the supercapacitor 5;

[0071] When the unlocking switch SB2 in the hysteresis voltage unlocking circuit 8 and the trigger switch SB1 in the triggering circuit 9 are both off, if the signal output by the second operational am...

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Abstract

The invention relates to an electric control sound production device which can be used as acoustic excitation in the automobile industry to carry out a transmission path analysis test. In the electric control sound production device, when an unlocking switch in a hysteresis voltage unlocking circuit and a trigger switch in a trigger circuit are both switched off, if a second operational amplifier in the hysteresis voltage unlocking circuit outputs a high level and a first operational amplifier in the trigger circuit outputs a low level, a switching circuit arranged between an alternating current power supply and a transformer is promoted to form an access for charging a super capacitor; when the trigger switch in the trigger circuit is closed and the unlocking switch in the hysteresis voltage unlocking circuit is kept open, if a signal output by the second operational amplifier in the hysteresis voltage unlocking circuit jumps from a low level to a high level and the first operational amplifier in the trigger circuit outputs a high level, the switching circuit arranged between the alternating current power supply and the transformer is promoted to reform an access for charging the super capacitor; and when the trigger switch is closed, a sound production head is triggered to produce sound by using the energy stored in the super capacitor.

Description

technical field [0001] The invention belongs to the field of automobile vibration and noise testing, and in particular relates to an electronically controlled sounding device. Background technique [0002] Vibration and noise performance is an important performance index of vehicles. Vibration, Noise, and Harshness (NVH) has become a specialized research field with a multidisciplinary background, involving multiphysics, deeply coupled and highly correlated with other vehicle properties. Transfer Path Analysis (TPA) is to identify the energy transfer from the excitation source to the response in the vehicle, use the structural optimization design to improve the system impedance matching, directly reduce the structural noise and air noise transmission rate, thereby reducing the response in the vehicle. Transfer path analysis is to carry out excitation detection, system transfer function identification and response prediction analysis from the perspective of system dynamics. I...

Claims

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Application Information

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IPC IPC(8): G01H11/08
CPCG01H11/08Y02T90/00
Inventor 牟小龙周安健邓承浩喻成刘卫国周富明
Owner 深蓝汽车科技有限公司