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A Loudspeaker Diaphragm Tester with Controlled Excitation Source

A technology of excitation source and loudspeaker, which is applied in the direction of electrical components, etc., can solve the problems of no effective monitoring of the driving loudspeaker, relatively high airtightness requirements between the diaphragm to be tested and the test tooling, and greater impact on stability

Active Publication Date: 2022-06-28
SHENZHEN JINGTUO INNOVATION TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] However, since this system does not effectively monitor the driving speaker, the stability of the system is greatly affected by the driving unit, and the airtightness between the diaphragm to be tested and the test tool is also relatively high; in practical applications has many limitations

Method used

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  • A Loudspeaker Diaphragm Tester with Controlled Excitation Source
  • A Loudspeaker Diaphragm Tester with Controlled Excitation Source
  • A Loudspeaker Diaphragm Tester with Controlled Excitation Source

Examples

Experimental program
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Effect test

Embodiment 1

[0120] This embodiment provides a speaker diaphragm tester with a controlled excitation source. The controlled excitation source is a speaker excitation system with feedback from an air pressure sensor. The system connection diagram is as follows figure 1 shown. This embodiment includes: 1. an excitation source; 2. an air pressure sensor; 3. a platform to be tested; 4. a laser displacement sensor; 5. a data processor; 501, a control device; 502, a signal preprocessing module; Operation module; 504, display device; 505, computer. The control 501 , the signal preprocessing module 502 , the data acquisition and operation module 503 , the display device 504 , and the computer 505 are collectively referred to as the data processor 5 .

[0121] The control device 501 is used to output the excitation signal to the excitation source 1; the signal processing module 502 is used to receive the detection signals of the air pressure sensor 2 and the laser displacement sensor 4, and transm...

Embodiment 2

[0133] This embodiment provides a speaker diaphragm tester with a controlled excitation source. The controlled excitation source selects a cylinder with feedback from an air pressure sensor. The system connection diagram is as follows figure 1 shown. The system connection and data detection method of the data processor 5 in this embodiment are similar to those in the first embodiment, only the excitation source 1 is changed from the speaker 101 to the cylinder 103 .

[0134] Image 6 It is a schematic diagram of the appearance provided by this embodiment. The diaphragm 6 to be measured is fixed by an upper pressing tool 301 and a lower pressing tool 302 . The lower pressing tool 302 is combined with the base 303 to form a sealed cavity, and the sealed cavity is provided with a leak hole 9 . A channel is provided on the base 303 and is connected with the air cylinder 103 through a gas pipe. The base 303 is assembled on the base 304, and the horizontal position is adjustable...

Embodiment 3

[0140] This embodiment provides a speaker diaphragm tester with a controlled excitation source. The controlled excitation source is a stepper push rod motor excitation system with feedback from an air pressure sensor. The system connection diagram is as follows figure 1 shown. The system connection, data detection, and data processing methods of the data processor 5 in this embodiment are similar to those in the second embodiment, only the excitation source 1 is changed from the cylinder 103 to the stepper push rod motor 102 .

[0141] Figure 9 It is a schematic diagram of the appearance provided by this embodiment. The diaphragm 6 to be measured is fixed by an upper pressing tool 301 and a lower pressing tool 302 . The lower pressing tool 302 is combined with the base 303 to form a closed cavity. A channel is provided on the base 303, and is connected with the stepper push rod motor 102 through a trachea. The base 303 is assembled on the base 304, and the horizontal posi...

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Abstract

The invention proposes a loudspeaker diaphragm tester with a controlled excitation source, including a platform to be tested, a controlled excitation source, a laser displacement sensor, and a control device; the diaphragm to be tested is fixed on the platform to be tested, and the laser displacement sensor is fixed On the platform to be tested; the diaphragm to be tested and the laser displacement sensor are coaxially arranged on the platform to be tested; the control device inputs the control signal to the controlled excitation source, and the controlled excitation source generates an excitation signal according to the control signal; the vibration to be measured The diaphragm is excited to vibrate by the excitation signal generated by the controlled excitation source; the laser displacement sensor detects the vibration information when the diaphragm vibrates. The controlled excitation source of the invention can better excite the vibration of the diaphragm to be tested, and obtain the physical parameters of the diaphragm by measuring air pressure, diaphragm displacement and other ways, and has high test accuracy and good stability.

Description

technical field [0001] The invention relates to the field of loudspeaker testing, in particular to a loudspeaker diaphragm tester with a controlled excitation source. Background technique [0002] The speaker is an electro-mechanical-sound transducer and an important element in audio equipment. As an important component inside the speaker, the diaphragm directly affects the performance parameters of the speaker. Therefore, there is a need for a reliable and stable test method and a tester constructed accordingly to test the loudspeaker diaphragm. [0003] The traditional test scheme drives the air through the speaker to further push the diaphragm; the amplitude curve of the diaphragm to be measured is captured by a pressure sensor or a laser sensor, so as to obtain the resonant frequency Fo value of the diaphragm. [0004] For example, in the patent CN 201788018 U, an acoustic sensor is used to pick up the pressure change of the cavity to obtain the resonant frequency Fo v...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): H04R29/00
CPCH04R29/001
Inventor 袁世明顾善勇闫鑫
Owner SHENZHEN JINGTUO INNOVATION TECH
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