CN107295450B

CN107295450B - Loudspeaker and correction method thereof

Info

Publication number: CN107295450B
Application number: CN201610221510.0A
Authority: CN
Inventors: 许志荣
Original assignee: Huaqi Shanghai Electronic Technology Co ltd
Current assignee: Huaqi Shanghai Electronic Technology Co ltd
Priority date: 2016-04-11
Filing date: 2016-04-11
Publication date: 2020-10-13
Anticipated expiration: 2036-04-11
Also published as: CN107295450A

Abstract

The invention discloses a loudspeaker and a correction method thereof.A controller judges and decodes the input signal to generate control signals of different modes, and an output end outputs the control signals to a loudspeaker unit to drive or adjust the loudspeaker unit.

Description

Loudspeaker and correction method thereof

Technical Field

The invention relates to a loudspeaker and a correction method thereof, in particular to the correction applied to the loudspeaker of an automobile.

Background

The loudspeaker (commonly called loudspeaker) is a device which is visible everywhere in modern society, the function of the loudspeaker is to make a sound, so that people in a certain range can receive the sound, the loudspeaker has the function of expanding or transmitting information, and when the loudspeaker is applied to a vehicle, the loudspeaker can make the sound to alert people outside the vehicle.

The control module of the loudspeaker used by the automobile can be mainly divided into two types, one type is a mechanical loudspeaker, and the other type is an electronic loudspeaker. The mechanical horn uses the on-off vibration diaphragm of the contact spring to make sound, and the electronic horn uses the on-off vibration diaphragm of the oscillation circuit control coil to make sound.

However, when the existing automobile horn is produced, according to the frequency requirements of different customers, the horn frequency must meet a change interval, so the horn needs to be respectively corrected after the production is finished, the correction mode is to open a hole on the horn, the horn is adjusted by the open hole, and if the automobile horn is a mechanical horn, the tightness of a contact reed is adjusted to control the frequency of a contact switch; if the electronic horn is used, the resistance value of the variable resistor in the circuit is adjusted to control the charging and discharging frequency of the circuit. The entire calibration process must be adjusted independently for each horn, which severely affects the production time, and the horn must be perforated, which may cause the quality of the horn to be affected or cause moisture permeation and a reduction in service life.

Therefore, the conventional calibration method for the car speaker has the defects of inconvenient mass production and influence on the quality of the speaker.

Disclosure of Invention

The present invention provides a speaker, which can simultaneously drive or adjust a speaker unit by using a single input signal.

The present invention provides a speaker, which utilizes input signals with different voltage levels and periods to generate different control signals for a speaker unit.

The present invention provides a speaker, which uses a controller to decode an input signal to generate a control signal.

To achieve the above-mentioned objectives and effects, the present invention discloses a speaker, which has an input end for receiving an input signal, the input signal having a power time and a calibration time, a controller for receiving the input signal and generating a control signal, and an output end for outputting the control signal to a speaker unit to drive or adjust the speaker unit.

In another embodiment of the present invention, a calibration method for a speaker includes receiving an input signal, the input signal having a power time and a calibration time, generating a control signal according to the input signal by a controller, and outputting the control signal to a speaker unit to drive or adjust the speaker unit.

Drawings

FIG. 1: which is a schematic diagram of a speaker according to an embodiment of the present invention;

FIG. 2: it is the input signal diagram of the speaker of the present invention;

FIG. 3: it is a schematic diagram of the input signal of the present invention in different voltage periods at the calibration time;

FIG. 4: which is a schematic diagram of the switching time of the input signal according to the present invention.

[ brief description of the drawings ]

1 loudspeaker

10 correction unit

100 controller

101 memory element

20 speaker unit

Vi input

Vo output terminal

Detailed Description

In order to provide a further understanding and appreciation for the structural features and advantages achieved by the present invention, the following detailed description of the presently preferred embodiments is provided:

referring to fig. 1, a speaker according to an embodiment of the invention is shown. As shown in the figure, the speaker 1 of the present invention has a speaker unit 20 and a calibration unit 10, the calibration unit 10 includes: an input Vi, a controller 100 and an output Vo.

Please refer to fig. 2, which is a schematic diagram of input signals of the speaker according to the present invention. As shown, the input Vi receives an input signal, which has a power time and a calibration time, the power time represents a time when the input signal provides a power voltage to drive the speaker unit 20, and the calibration time represents a time when the input signal provides a calibration voltage to calibrate the speaker unit 20. After the input Vi receives the input signal, the controller 100 generates a control signal having a power mode and a calibration mode, where the two modes are to decode the input signal by the controller 100, and generate control signals of different modes according to different times of the input signal, and the decoding mode of the controller 100 is described later. The output Vo receives the control signal and outputs the control signal to the speaker unit 20 to drive the speaker unit 20 to generate sound or adjust the frequency of the speaker unit 20. The control module of the speaker unit 20 can be applied to the present invention either electronically or mechanically.

In other words, the loudspeaker is calibrated by providing the input signal through the jig and automatically adjusting the frequency in the mass production process, thereby saving the production time, eliminating the need to open holes on the speaker unit 20 and prolonging the service life of the speaker unit 20.

Referring back to fig. 1, the calibration unit 10 further includes a memory device 101 connected to the controller 100, the memory device 101 being used for storing parameters. When the controller 100 adjusts the speaker unit 20, the parameters are stored in the storage device 101 together, so that the parameters do not disappear due to power loss when the speaker 1 is manufactured and shipped. The memory device 101 may be an electronic fuse (eFUSE) or an electrically erasable, rewritable read only memory (EEPROM).

Since the driving voltage of a speaker in the market is 12 volts, the decoding mode of the controller 100 is described here by taking the maximum 12 volts of the input signal as an example. Please refer to fig. 3, which is a schematic diagram of different voltage periods of the input signal at the calibration time according to the present invention. As shown, the input signal has different voltage levels and periods. When the input signal is in the power time, it is a constant voltage signal, i.e. a 12 v voltage source, and the controller receives the 12 v voltage, and can determine the current voltage time, and generate the control signal of the power mode, and output the control signal to the speaker unit 20 through the output Vo. It should be noted that the control signal of the power mode may be the same voltage level as the input signal, or may generate different voltage levels according to different driving voltages of the speaker unit 20, for example, when the driving voltage of the speaker unit 20 requires a higher voltage level, the controller 100 generates the control signal of the voltage level.

When the input signal is at the calibration time, it is a periodic voltage signal, and the voltage level at the calibration time is lower than the voltage level at the power time, and when the controller 100 receives the voltage level lower than the power time, it can determine that the current time is the calibration time. Taking the above example as an example, the controller 100 receives a voltage of 10.5 volts or 9 volts lower than 12 volts, and determines that the current time is the calibration time, and generates the control signal of the calibration mode. The controller 100 receives the input signal of the calibration time, starts decoding the input signal, and generates the control signal of the calibration mode according to the period of the voltage level. Taking fig. 3 as an example, the high level of the input signal is 10.5 volts, the low level is 9 volts, and when the high level is 0.5 milliseconds and the low level is 0.5 milliseconds (i.e. the whole period is 1 millisecond), the logic of the control signal is 0; when the high level is 0.5 ms and the low level is 1 ms (i.e. the whole period is 1.5 ms), the logic of the control signal is 1. It should be noted that the decoding manner of the controller 100 can be determined according to the period of the high or low bits, or according to the entire period, which is not limited by the present invention.

By the judgment and decoding of the controller 100, the loudspeaker unit 20 can be driven and tested and the frequency can be adjusted at the same time by using only one input signal, so that the loudspeaker unit 20 does not need to open a hole and the pin connection frequency signal of the loudspeaker unit 20 does not need to be increased to adjust the frequency.

Please refer to fig. 4, which is a schematic diagram of the switching time of the input signal according to the present invention. As shown in the figure, the input signal can include a switching time, the input signal of the switching time is a periodic signal, the period of the high and low level bits is different from the calibration time, so that the controller can judge. Taking fig. 4 as an example, the voltage level of the input signal has a high level and a low level, and when the controller receives the input signal with the low level and the time exceeds 4 milliseconds, it can know that the input signal is ready to enter the calibration time.

The input signal includes a switching time, which can be switched first when the power time enters the calibration time, so that the controller 100 has enough time to determine that the input signal is ready to enter the calibration time, thereby avoiding the instability of the input signal caused by circuit factors and causing the controller 100 to determine the occurrence of errors.

The invention relates to a loudspeaker and a correction method thereof.A controller is used for judging an input signal which has voltage levels and periods of different time, and if the input signal is in the power supply time, the controller provides a control signal of a power supply mode to drive the loudspeaker. If the input signal is in the calibration time, the controller decodes the input signal, and provides a control signal of the calibration mode to the speaker according to the decoding result, so that the inspector can adjust the speaker frequency, or can actively adjust the sound frequency of the speaker unit 20 after the speaker 1 is set, thereby achieving the advantage of reducing the labor cost. The present invention can drive and adjust the speaker unit 20 only by a single input signal, and can be combined with an on-line production jig to be simultaneously performed in mass production, thereby saving the time cost of adjusting the speaker unit one by one and prolonging the service life of the speaker unit.

The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not intended to limit the scope of the present invention, which is defined by the appended claims.

Claims

1. A speaker is characterized in that the speaker is provided with a speaker unit and a correction unit, and the correction unit comprises:

an input terminal for receiving an input signal, the input signal having a power time and a calibration time, the input signal being a constant voltage signal during the power time, the input signal being a periodic voltage signal during the calibration time;

a controller, generating a control signal according to the input signal, wherein the control signal is a control signal of a power mode when the input signal is in the power time, the control signal is a control signal of a calibration mode when the input signal is in the calibration time, the input signal further comprises a switching time, and the controller judges the switching time point of the power mode and the calibration mode according to the switching time; and

an output end, through which the control signal is output to a speaker unit;

the controller generates the control signal according to the period of the high level and the low level, the input signal of the switching time is a periodic signal, the period of the high level and the low level is different from the correction time, and the voltage level of the input signal at the correction time is lower than the voltage level of the input signal at the power time.

2. The speaker of claim 1, wherein the control module of the speaker unit is electronic or mechanical.

3. The loudspeaker of claim 1, wherein the calibration unit further comprises a memory element coupled to the controller, the memory element storing parameters adjusted by the controller.

4. A method for calibrating a loudspeaker, comprising:

receiving an input signal, wherein the input signal has a power time and a calibration time, the input signal is a constant voltage signal during the power time, and the input signal is a periodic voltage signal during the calibration time;

a controller generates a control signal according to the input signal, the generated control signal is a control signal of a power mode when the input signal is in the power time, the generated control signal is a control signal of a correction mode when the input signal is in the correction time, the input signal further comprises a switching time, and the controller judges the switching time point of the power mode and the correction mode according to the switching time; and

outputting the control signal to a speaker unit to drive or adjust the speaker unit;

5. The method of claim 4, further comprising storing the adjusted parameters.