CN101938685B - Automatic diagnosis method of automobile sound loudspeaker and antenna - Google Patents
Automatic diagnosis method of automobile sound loudspeaker and antenna Download PDFInfo
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- CN101938685B CN101938685B CN 201010153826 CN201010153826A CN101938685B CN 101938685 B CN101938685 B CN 101938685B CN 201010153826 CN201010153826 CN 201010153826 CN 201010153826 A CN201010153826 A CN 201010153826A CN 101938685 B CN101938685 B CN 101938685B
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Abstract
The invention relates to the technical field of automobile sound, in particular to an automatic diagnosis method of an automobile sound loudspeaker and an antenna. The automatic diagnosis method is characterized in that an automobile sound circuit is respectively provided with a detection circuit for monitoring the loudspeaker or the connection state of two ends of the antenna; the detection circuit outputs a signal to a microprocessor MCU; the MCU controls a display screen to display the detected sate after judging data; the detection circuit comprises a power amplifier, a voltage acquisition unit and a voltage comparison unit, wherein the power amplifier is used for driving the loudspeaker or the antenna, the voltage acquisition unit and the voltage comparison unit are successively connected to the automobile sound loudspeaker or two ends of the antenna, the power amplifier is provided with a diagnosis pin which is connected with the MCU, and the output end of the voltage comparison unit is connected with the MCU. The diagnosis method of the invention is simple and visual, does not need other diagnosis equipment and greatly improves detection efficiency while lowering detection cost.
Description
Technical field
The present invention relates to the automobile audio technical field, specifically instigate the loudspeaker of automobile audio and the automatic diagnosis method of antenna.
Background technology
At present, automobile audio diagnostic techniques complicated operation is generally diagnosed by bus, also needs special equipment to coordinate and carries out for example diagnostic equipment, and the diagnosis cost is higher.For the automobile that there is no bus, can not realize especially diagnosis.Automobile audio is with the antenna reception external information, and with the loudspeaker broadcast information, when it dispatches from the factory, these two fundamentals are to detect, and because detection method is complicated, efficient is relatively low, and whole production management process is restricted.
Summary of the invention
The problem that the present invention need solve is to provide a kind of method of can be easily and efficiently automotive acoustic speaker and antenna being diagnosed.
For addressing the above problem, the technical scheme that the present invention takes is: the automatic diagnosis method of automotive acoustic speaker or antenna, namely be provided for respectively monitoring the testing circuit of loudspeaker or antenna ends connection status in automobile audio circuit, this testing circuit outputs signal to Micro-processor MCV, and Micro-processor MCV shows to the rear control display screen display of data judgement the state that detects.
Described testing circuit comprises that the power amplifier for driving loudspeaker or antenna reaches voltage acquisition unit, the voltage comparison unit that is connected in successively automotive acoustic speaker or antenna ends, described power amplifier is provided with the diagnosis pin, this pin is connected with Micro-processor MCV, and described voltage comparison unit output connects MCU.
Be provided with the button for the detection trigger function in described sound equipment, this button is connected with Micro-processor MCV.
Described loudspeaker self-diagnosing method comprise successively detect loudspeaker whether over the ground or the step of power supply short circuit, detect between loudspeaker two lines whether short circuit step, detect the step whether loudspeaker two lines open a way.
Described antenna self-diagnosing method comprises successively the step that detects between antenna two lines whether short circuit, detects the step whether antenna two lines open a way.
With respect to prior art, diagnostic method of the present invention is succinct, directly perceived, and need not pass through other diagnostic device, and when testing cost reduces, detection efficiency improves greatly.
Description of drawings
Speaker detection circuit schematic block diagram figure in the described vehicle audio of Fig. 1;
Speaker detection circuit voltage acquisition and voltage rating unit embodiment principle schematic in the described vehicle audio of Fig. 2;
Speaker detection circuit voltage transitions part embodiment circuit theory schematic diagram in the described vehicle audio of Fig. 3;
Fig. 4 is antenna detection schematic block diagram in described vehicle audio;
Fig. 5 is described antenna detection schematic flow sheet.
Embodiment
The present invention is described in further detail below in conjunction with drawings and Examples.
The automatic diagnosis method of automotive acoustic speaker of the present invention and antenna is to utilize the original resource of automobile audio (driving the power amplifier of loudspeaker), and expansion Micro-processor MCV function realizes.
As Fig. 1, described method arranges a sample resistance R between the loudspeaker both positive and negative polarity of automobile audio, sample resistance R both end voltage is finally led to a comparator through a series of processing, and comparator output terminal is connected to Micro-processor MCV; The diagnosis pin that drives simultaneously the power amplifier of loudspeaker also is connected to MCU, and MCU is according to the connection status of the magnitude of voltage judgement loudspeaker of the power amplifier diagnosis pin output that detects, and the control LCD display shows this state.
When loudspeaker two lines during to power supply or ground short circuit, power amplifier diagnosis pin (the 25th pin) output through a series of processing output 2V voltages to MCU, if loudspeaker two lines not to the VDD-to-VSS short circuit, are exported 5V voltage to MCU.
Concrete, in described testing circuit voltage acquisition and voltage rating unit as shown in Figure 2, voltage transitions part embodiment circuit.Four loudspeaker of automobile audio operated by rotary motion, the corresponding comparator of speaker detection circuit, two comparator output terminals connect a voltage conversion circuit.
Detect loudspeaker two ends whether during short circuit, SVR-LOW input 14V voltage, the MCU output low level is during to OPEN/SHORT, if loudspeaker two terminal shortcircuits, NO_LS_FRONT_MCU returns to low level to MCU.Whether when detecting loudspeaker two ends and opening a way, SVR-LOW input 14V voltage, MCU output high level is during to OPEN/SHORT, if loudspeaker two ends open circuit, NO_LS_FRONT_MCU returns to high level to MCU.If between loudspeaker two lines, normally MCU output high level during to OPEN/SHORT, NO_LS_FRONT_MCU returns to low level to MCU, the MCU output low level is during to OPEN/SHORT, and NO_LS_FRONT_MCU returns to high level to MCU.
To sum up, the possible malfunction of vehicle audio loudspeaker comprises:
| The loudspeaker state | The MCU testing result | The LCD show state |
| Over the ground or to power supply short circuit | The diagnosis pin output end voltage of power amplifier is in a specified scope. | Over the ground or power supply short circuit |
| The two poles of the earth short circuit | The diagnosis pin output end voltage of power amplifier is in normal range (NR), and during to control switch, the testing circuit output low level is to MCU when M CU output low level. | The two poles of the earth short circuit |
| The two poles of the earth open circuit | The diagnosis pin output end voltage of power amplifier is in normal range (NR), and when MCU exported high level to control switch, testing circuit output high level was to MCU. | The two poles of the earth open circuit |
| Normally | The diagnosis pin output end voltage of power amplifier is in normal range (NR).When control switch was low level, MCU detected high level; When control switch was high level, MCU detected low level. | Normally |
The diagnosis of described antenna and the diagnostics classes of above-mentioned loudspeaker seemingly, are also to add testing circuit in antenna ends, and testing result input MCU finally shows the antenna ends state by MCU.Its testing circuit block diagram and schematic diagram are as shown in Fig. 4,5, and wherein ANT_ON/OFF, ANT_SENS end connects MCU, and ANT_ON/OFF is the MCU control end, starts or closes antenna detection, and ANT_SENS is MCU detection signal end.
Detected state and MCU detected value are listed as follows:
| Antenna condition | ANT_SENS end output valve scope | The ANT_SENS representative value |
| ok | 0-1V | 0V |
| Short circuit | 1-3.5V | 2.7V |
| Open circuit | 3.5-5.5 |
5V |
Above-mentioned testing process can be triggered by button, after automobile audio start, when MCU detects this button and is pressed, enters trace routine, gathers sound equipment and antenna ends voltage condition and judgement demonstration.
The method of the invention can promote the use of other parts of automobile audio, as long as correspondence arranges testing circuit, then correspondence is write trace routine and got final product.
Need to prove, conceive under prerequisite not breaking away from the present invention, any apparent or minor variations to the present invention does all belongs to protection range of the present invention.
Claims (4)
1. the automatic diagnosis method of automotive acoustic speaker and antenna, it is characterized in that: the testing circuit that is provided for respectively monitoring loudspeaker or antenna ends connection status in automobile audio circuit, this testing circuit outputs signal to Micro-processor MCV, and Micro-processor MCV shows to the rear control display screen display of data judgement the state that detects;
Described testing circuit comprises that the power amplifier for driving loudspeaker or antenna reaches voltage acquisition unit, the voltage comparison unit that is connected in successively automotive acoustic speaker or antenna ends, described power amplifier is provided with the diagnosis pin, this pin is connected with Micro-processor MCV, and described voltage comparison unit output connects MCU.
2. the automatic diagnosis method of automotive acoustic speaker according to claim 1 and antenna,
It is characterized in that: be provided with the button for the detection trigger function in described sound equipment, this button is connected with Micro-processor MCV.
3. the automatic diagnosis method of automotive acoustic speaker according to claim 2 and antenna,
It is characterized in that: described loudspeaker self-diagnosing method comprise successively detect loudspeaker whether over the ground or the step of power supply short circuit, detect between loudspeaker two lines whether short circuit step, detect the step whether loudspeaker two lines open a way.
4. the automatic diagnosis method of automotive acoustic speaker according to claim 2 and antenna,
It is characterized in that: described antenna self-diagnosing method comprises successively the step that detects between antenna two lines whether short circuit, detects the step whether antenna two lines open a way.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010153826 CN101938685B (en) | 2010-04-20 | 2010-04-20 | Automatic diagnosis method of automobile sound loudspeaker and antenna |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010153826 CN101938685B (en) | 2010-04-20 | 2010-04-20 | Automatic diagnosis method of automobile sound loudspeaker and antenna |
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| Publication Number | Publication Date |
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| CN101938685A CN101938685A (en) | 2011-01-05 |
| CN101938685B true CN101938685B (en) | 2013-05-22 |
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| CN 201010153826 Active CN101938685B (en) | 2010-04-20 | 2010-04-20 | Automatic diagnosis method of automobile sound loudspeaker and antenna |
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| TWI432749B (en) * | 2011-11-28 | 2014-04-01 | Wistron Corp | Antenna detection module and electronic device thereof |
| CN102426452A (en) * | 2011-12-30 | 2012-04-25 | 上海博泰悦臻电子设备制造有限公司 | Vehicle-mounted system with long-distance diagnostic function |
| US8706278B2 (en) * | 2012-02-15 | 2014-04-22 | GM Global Technology Operations LLC | Non-bussed vehicle amplifier diagnostics |
| CN102929268B (en) * | 2012-10-16 | 2015-04-15 | 福建慧翰微电子股份有限公司 | Self checking implementation method of vehicle-mounted remote monitoring terminal |
| CN104703110B (en) * | 2013-12-10 | 2018-12-04 | 上海博泰悦臻网络技术服务有限公司 | Loudspeaker state diagnostic circuit |
| CN105277834A (en) * | 2014-06-18 | 2016-01-27 | 艾默生网络能源有限公司 | Detection circuit |
| CN107172558A (en) * | 2017-06-08 | 2017-09-15 | 浙江工业大学 | A kind of novel horn fault detection method |
| CN107368061B (en) * | 2017-08-23 | 2020-05-29 | 安徽江淮汽车集团股份有限公司 | Self-diagnosis system and method for vehicle-mounted sound equipment |
| CN107402330A (en) * | 2017-09-08 | 2017-11-28 | 慧翰微电子股份有限公司 | TBOX external antennas measure loop and detection method |
| CN109756729B (en) * | 2017-11-01 | 2020-07-31 | 厦门雅迅网络股份有限公司 | Vehicle-mounted CVBS video signal output interface state detection circuit and method |
| CN108235212A (en) * | 2017-12-26 | 2018-06-29 | 惠州市德赛西威汽车电子股份有限公司 | A kind of open detection circuit of horn circuit |
| CN110350473B (en) * | 2018-04-03 | 2022-08-12 | 中兴通讯股份有限公司 | Control circuit, method and device |
| CN113242502B (en) * | 2021-03-22 | 2022-07-26 | 苏州上声电子股份有限公司 | A kind of car audio system and its speaker open circuit detection method |
| CN115782746A (en) * | 2022-10-08 | 2023-03-14 | 重庆长安汽车股份有限公司 | Vehicle warning sound control method, device, control equipment, automobile and storage medium |
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| JP5002045B2 (en) * | 2010-09-10 | 2012-08-15 | 株式会社フジタ | Building basic structure |
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| JPH052045A (en) * | 1991-06-25 | 1993-01-08 | Onkyo Sokki Kk | Vehicle-borne inspecting apparatus |
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| CN2229087Y (en) * | 1994-10-12 | 1996-06-12 | 煤炭科学研究总院南京研究所 | Automotive circuit tester |
| CN1204904A (en) * | 1997-06-30 | 1999-01-13 | 日本电气株式会社 | Antenna Fault Detection System |
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| JP5002045B2 (en) * | 2010-09-10 | 2012-08-15 | 株式会社フジタ | Building basic structure |
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| CN101938685A (en) | 2011-01-05 |
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Address after: 516006 Guangdong province Huizhou Zhongkai hi tech Industrial Development Zone Pearl River Road No. 1 Patentee after: HUIZHOU DESAY SV AUTOMOTIVE CO., LTD. Address before: 516006 Guangdong province Huizhou Zhongkai hi tech Industrial Development Zone Pearl River Road No. 1 Patentee before: Huizhou Desay SV Auto. Electronics Co., Ltd. |