CN113242503A - Self-checking method for loudspeaker - Google Patents
Self-checking method for loudspeaker Download PDFInfo
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- CN113242503A CN113242503A CN202110452558.3A CN202110452558A CN113242503A CN 113242503 A CN113242503 A CN 113242503A CN 202110452558 A CN202110452558 A CN 202110452558A CN 113242503 A CN113242503 A CN 113242503A
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- loudspeaker
- self
- vibration signal
- acceleration sensor
- sound
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04R—LOUDSPEAKERS, MICROPHONES, GRAMOPHONE PICK-UPS OR LIKE ACOUSTIC ELECTROMECHANICAL TRANSDUCERS; DEAF-AID SETS; PUBLIC ADDRESS SYSTEMS
- H04R29/00—Monitoring arrangements; Testing arrangements
- H04R29/001—Monitoring arrangements; Testing arrangements for loudspeakers
Abstract
The invention discloses a loudspeaker self-checking method, which comprises the following steps: arranging an acceleration sensor and a loudspeaker on a device; under the static state of the equipment, enabling the loudspeaker to emit first sound, simultaneously detecting a first vibration signal by the acceleration sensor during the playing period of the first sound, and recording and storing the first vibration signal; when the loudspeaker is subjected to self-checking, the loudspeaker emits a first sound, and meanwhile, the acceleration sensor detects a second vibration signal during the playing period of the first sound and records and stores the second vibration signal; comparing the first vibration signal with the second vibration signal, if the similarity is greater than or equal to a first threshold value, determining that the loudspeaker is normal, and passing self-checking; if the similarity is smaller than the first threshold value, the loudspeaker is judged to be abnormal, and the self-test is not passed. The invention has the advantages of simple structure, low complexity of calculation mode, relatively small calculation pressure, high self-checking accuracy and difficult interference by external factors.
Description
Technical Field
The invention relates to the field of loudspeakers, in particular to a loudspeaker self-checking method.
Background
A speaker, also called a "horn", is a very common electroacoustic transducer, which is found in electronic and electrical devices for generating sound. The loudspeaker is a transducer for converting an electric signal into an acoustic signal, and the quality of the loudspeaker has great influence on the sound quality. The loudspeaker is the weakest component in the audio equipment, and is the most important component for the audio effect. Therefore, it becomes an important self-test item to detect whether the speaker can work normally.
The conventional way of performing self-checking on the speaker is to monitor the sound emitted by the speaker through a microphone, or to add a hardware detection circuit to perform self-checking, and to perform self-checking through the microphone is easily interfered by external noise, and to perform self-checking through the detection circuit increases the circuit cost.
Disclosure of Invention
In order to solve the above technical problem, the present invention provides a speaker self-checking method, including:
arranging an acceleration sensor and a loudspeaker on a device;
under the static state of the equipment, enabling the loudspeaker to emit first sound, simultaneously detecting a first vibration signal by the acceleration sensor during the playing period of the first sound, and recording and storing the first vibration signal;
when the loudspeaker is subjected to self-checking, the loudspeaker emits a first sound, and meanwhile, the acceleration sensor detects a second vibration signal during the playing period of the first sound and records and stores the second vibration signal;
comparing the first vibration signal with the second vibration signal, if the similarity is greater than or equal to a first threshold value, determining that the loudspeaker is normal, and passing self-checking; if the similarity is smaller than the first threshold value, the loudspeaker is judged to be abnormal, and the self-test is not passed.
Further, in the speaker self-test method, in the step of comparing the first vibration signal with the second vibration signal:
the first vibration signal is divided into pieces according to 10ms, and the amplitude of each piece is averaged to obtain a first average amplitude;
the second vibration signal is sliced according to 10ms, and amplitude of each slice is averaged to obtain a second average amplitude;
summing the absolute values of the differences of the subtraction of the first average amplitude and the second average amplitude, to give M0;
the absolute values of the first average amplitudes are summed, which is taken as M1.
Further, in the speaker self-test method, the similarity is equal to (M1-M0)/M1.
Further, in the speaker self-test method, the similarity is set to 80%.
Further, in the loudspeaker self-checking method, the acceleration sensor and the loudspeaker are arranged on the same circuit board or in the same cavity.
Further, in the speaker self-test method, during speaker self-test, the method further includes the steps of: and judging whether the equipment is in a non-acceleration state or not through an acceleration sensor.
Further, in the speaker self-test method, the no-acceleration state includes: uniform motion or static state.
The invention does not need to increase the cost for the equipment with the acceleration sensor, and the cost for adding the acceleration sensor to the equipment without the acceleration sensor is not high. The invention has the advantages of simple structure, low complexity of calculation mode, relatively small calculation pressure, high self-checking accuracy and difficult interference by external factors.
Drawings
Fig. 1 is a flow chart of the self-checking method of the loudspeaker of the invention.
Detailed Description
The loudspeaker self-test method of the present invention will now be described in more detail with reference to the schematic drawings, in which preferred embodiments of the invention are shown, it being understood that a person skilled in the art may modify the invention described herein while still achieving the advantageous effects of the invention. Accordingly, the following description should be construed as broadly as possible to those skilled in the art and not as limiting the invention.
The invention is described in more detail in the following paragraphs by way of example with reference to the accompanying drawings. Advantages and features of the present invention will become apparent from the following description and from the claims. It is to be noted that the drawings are in a very simplified form and are not to precise scale, which is merely for the purpose of facilitating and distinctly claiming the embodiments of the present invention.
Because the loudspeaker pronounces sound by self vibration, when the acceleration sensor and the loudspeaker are positioned on the same circuit board or in the same cavity, the acceleration sensor can clearly detect the vibration in the sound frequency range, and according to the characteristic, the acceleration sensor can be used for detecting whether the loudspeaker works normally.
As shown in fig. 1, the present invention provides a speaker self-testing method, including:
s1: arranging an acceleration sensor and a loudspeaker on a device, and arranging the acceleration sensor and the loudspeaker on the same circuit board or in the same cavity;
s2: under the static state of the equipment, enabling the loudspeaker to emit first sound, simultaneously detecting a first vibration signal by the acceleration sensor during the playing period of the first sound, and recording and storing the first vibration signal;
s3: when the loudspeaker is subjected to self-detection, whether the equipment is in an acceleration-free state or not is judged through an acceleration sensor, wherein the acceleration-free state comprises the following steps: uniform motion or static state; if the loudspeaker is in a non-acceleration state, the loudspeaker emits a first sound, and meanwhile, the acceleration sensor detects a second vibration signal during the playing period of the first sound and records and stores the second vibration signal;
s4: comparing the first vibration signal with the second vibration signal, if the similarity is greater than or equal to a first threshold value, determining that the loudspeaker is normal, and passing self-checking; if the similarity is smaller than the first threshold value, the loudspeaker is judged to be abnormal, and the self-test is not passed.
Specifically, in this step:
s4-1: the first vibration signal is divided into pieces according to 10ms, and the amplitude of each piece is averaged to obtain a first average amplitude;
s4-2: the second vibration signal is sliced according to 10ms, and amplitude of each slice is averaged to obtain a second average amplitude;
s4-3: summing the absolute values of the differences of the subtraction of the first average amplitude and the second average amplitude, to give M0;
s4-4: the absolute values of the first average amplitudes are summed, which is taken as M1.
S4-5: calculating the similarity to be equal to (M1-M0)/M1, in this embodiment, setting the similarity to be 80%, that is, if the similarity is greater than or equal to 80%, determining that the speaker is normal, and passing the self-test; and if the similarity is less than 80%, the loudspeaker is judged to be abnormal, and the self-test is not passed.
In summary, the present invention does not require a cost increase for the device having the acceleration sensor, and the cost is not high for the device having no acceleration sensor. The invention has the advantages of simple structure, low complexity of calculation mode, relatively small calculation pressure, high self-checking accuracy and difficult interference by external factors.
It will be apparent to those skilled in the art that various changes and modifications may be made in the present invention without departing from the spirit and scope of the invention. Thus, if such modifications and variations of the present invention fall within the scope of the claims of the present invention and their equivalents, the present invention is also intended to include such modifications and variations.
Claims (7)
1. A loudspeaker self-test method, comprising:
arranging an acceleration sensor and a loudspeaker on a device;
under the static state of the equipment, enabling the loudspeaker to emit first sound, simultaneously detecting a first vibration signal by the acceleration sensor during the playing period of the first sound, and recording and storing the first vibration signal;
when the loudspeaker is subjected to self-checking, the loudspeaker emits a first sound, and meanwhile, the acceleration sensor detects a second vibration signal during the playing period of the first sound and records and stores the second vibration signal;
comparing the first vibration signal with the second vibration signal, if the similarity is greater than or equal to a first threshold value, determining that the loudspeaker is normal, and passing self-checking; if the similarity is smaller than the first threshold value, the loudspeaker is judged to be abnormal, and the self-test is not passed.
2. The loudspeaker self-test method of claim 1, wherein in the step of comparing the first vibration signal and the second vibration signal:
the first vibration signal is divided into pieces according to 10ms, and the amplitude of each piece is averaged to obtain a first average amplitude;
the second vibration signal is sliced according to 10ms, and amplitude of each slice is averaged to obtain a second average amplitude;
summing the absolute values of the differences of the subtraction of the first average amplitude and the second average amplitude, to give M0;
the absolute values of the first average amplitudes are summed, which is taken as M1.
3. The loudspeaker self-test method of claim 2, wherein the similarity is equal to (M1-M0)/M1.
4. The loudspeaker self-test method of claim 1, wherein the similarity is set to 80%.
5. The loudspeaker self-test method of claim 1, wherein the acceleration sensor and the loudspeaker are disposed on the same circuit board or within the same cavity.
6. The loudspeaker self-checking method of claim 1, characterized in that, in the loudspeaker self-checking, it further comprises the steps of: and judging whether the equipment is in a non-acceleration state or not through an acceleration sensor.
7. The loudspeaker self-test method of claim 5, wherein the no acceleration state comprises: uniform motion or static state.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN202110452558.3A CN113242503A (en) | 2021-04-26 | 2021-04-26 | Self-checking method for loudspeaker |
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| CN202110452558.3A CN113242503A (en) | 2021-04-26 | 2021-04-26 | Self-checking method for loudspeaker |
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486470A (en) * | 2014-12-31 | 2015-04-01 | 山东共达电声股份有限公司 | Self-inspection method and system of acoustical device in terminal equipment |
| CN106154158A (en) * | 2015-04-10 | 2016-11-23 | 小米科技有限责任公司 | Terminal motor detecting method and device |
| CN106817470A (en) * | 2017-01-20 | 2017-06-09 | 上海卓易科技股份有限公司 | A kind of detecting system and system based on mobile terminal motor |
| WO2018081927A1 (en) * | 2016-11-01 | 2018-05-11 | 华为技术有限公司 | Volume adjustment method and apparatus, and electronic device |
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2021
- 2021-04-26 CN CN202110452558.3A patent/CN113242503A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104486470A (en) * | 2014-12-31 | 2015-04-01 | 山东共达电声股份有限公司 | Self-inspection method and system of acoustical device in terminal equipment |
| CN106154158A (en) * | 2015-04-10 | 2016-11-23 | 小米科技有限责任公司 | Terminal motor detecting method and device |
| WO2018081927A1 (en) * | 2016-11-01 | 2018-05-11 | 华为技术有限公司 | Volume adjustment method and apparatus, and electronic device |
| CN106817470A (en) * | 2017-01-20 | 2017-06-09 | 上海卓易科技股份有限公司 | A kind of detecting system and system based on mobile terminal motor |
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