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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, great influence on stability, and relatively high airtightness requirements between the diaphragm to be tested and the test tooling

Active Publication Date: 2017-03-15
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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  • Loudspeaker diaphragm tester with controlled excitation source
  • Loudspeaker diaphragm tester with controlled excitation source
  • Loudspeaker diaphragm tester with controlled excitation source

Examples

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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 air pressure sensor feedback. The system connection diagram is as follows figure 1 shown. This embodiment includes: 1. excitation source; 2. air pressure sensor; 3. platform to be tested; 4. laser displacement sensor; 5. data processor; 501. control device; 502. signal preprocessing module; 503. data acquisition and Operation module; 504, display device; 505, computer. Among them, the control 501 , the signal preprocessing module 502 , the data acquisition and calculation 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 sens...

Embodiment 2

[0133] This embodiment provides a loudspeaker diaphragm tester with a controlled excitation source. The controlled excitation source is a cylinder with air pressure sensor feedback. 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 air cylinder 103 .

[0134] Figure 6 It is a schematic diagram of the appearance provided by this embodiment. The diaphragm 6 to be tested is fixed by an upper pressing tool 301 and a lower pressing tool 302 . The lower pressing tool 302 is combined with the abutment 303 to form a sealed cavity, and a leakage hole 9 is set in the sealed cavity. A channel is provided on the base platform 303, and is connected with the cylinder 103 through an air pipe. The abutment 303 is assembled on the base 304, and its horizontal position is adjust...

Embodiment 3

[0140] This embodiment provides a speaker diaphragm tester with a controlled excitation source. The controlled excitation source is a stepping rod motor excitation system with air pressure sensor feedback. 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 tested is fixed by an upper pressing tool 301 and a lower pressing tool 302 . The lower pressing tool 302 is combined with the abutment 303 to form a closed cavity. A channel is provided on the base platform 303, and is connected with the stepping rod motor 102 through an air pipe. The abutment 303 is assembled on the base 304, and its horizontal pos...

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Abstract

The invention provides a loudspeaker diaphragm tester with a controlled excitation source. The tester comprises a to-be-tested platform, the controlled excitation source, a laser displacement sensor and a control device. To-be-tested diaphragm is fixed on the to-be-tested platform. The laser displacement sensor is fixed on the to-be-tested platform. To-be-tested diaphragm and the laser displacement sensor are coaxially arranged on the to-be-tested platform. The control device inputs a control signal into the controlled excitation source. The controlled excitation source generates an excitation signal according to the control signal. The to-be-tested diaphragm is excited by an excitation signal generated by the controlled excitation source to generate vibration. The laser displacement sensor detects vibration information when the diaphragm vibrates. According to the tester, the to-be-tested diaphragm can be excited by the controlled excitation source to vibrate well; physical parameters of the diaphragm are obtained through various channels such as measuring air pressure and diaphragm displacement; and the tester has relatively high test precision and relatively high 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 loudspeaker is an electric-force-acoustic transducer, which is an important component in audio equipment. As an important part inside the speaker, the diaphragm directly affects the performance parameters of the speaker. Therefore, there is a need for a reliable and stable testing method and a tester constructed accordingly to test the speaker 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 tested is captured by a pressure sensor or a laser sensor, so as to obtain the resonance 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 ...

Claims

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Application Information

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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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