CN203811715U - Circuit for test of automobile audio and video and multimedia integrated system - Google Patents
Circuit for test of automobile audio and video and multimedia integrated system Download PDFInfo
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- CN203811715U CN203811715U CN201420205131.9U CN201420205131U CN203811715U CN 203811715 U CN203811715 U CN 203811715U CN 201420205131 U CN201420205131 U CN 201420205131U CN 203811715 U CN203811715 U CN 203811715U
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Abstract
The utility model relates to automobile electronic tests, and especially relates to a circuit for a test of an automobile audio and video and multimedia integrated system. The circuit includes a master control IC, and further includes an ACC control circuit connected to a test device, and an LED display circuit, a key detection circuit and a nixie tube drive circuit which are all connected with IO ports of the master control IC, a current detection circuit, a CON3 socket of which is connected with the test device, and an SDA/SCI end connected with an I2C port of the master control IC. The circuit for the test of the automobile audio and video and multimedia integrated system does not need manual control, can work in high-temperature or low-temperature environment, and helps to shorten a development cycle of the multimedia integrated system and to reduce the road test time.
Description
Technical field
The present invention relates to automotive electronics test, particularly relate to the circuit of a kind of automobile audio-video and multimedia integrated system test.
Background technology
Automobile audio-video and multimedia integrated system are collection MP3, MP4, navigation, WIFI connection, 3G communication, Bluetooth technology, CD/DVD broadcasting, FM/AM, the vehicle video-audio system that the technology such as TFT demonstration integrate.
Because in-vehicle navigation apparatus quality at present is on the market uneven, cause user to experience very poor.And the integrated function of navigational system itself is various, need parameter and the index of test a lot, in development and production process, still adopt at present the row of one on frock clamp toggle switch to simulate to automobile and control one group of relevant signal, such as the opening and closing of the signals such as ACC, reversing, parking, car light.By manually repeatedly stirring these analog switches, detect the whether number of times of these control signals of significant response statistical system failure-free operation of multimedia integrated system.On this basis, refill the enterprising walking along the street face test of automobile.
Above-mentioned this manual mode is simulated and is carried out reliability testing checking and not only expend a large amount of time, and is difficult to the system reliability under a lot of pressure test conditions of test, such as repeatedly restart for 10,000 times test, 10,000 times repeatedly dormancy test etc.Consider running car environment, car multimedia integrated system may be for a long time in low-temperature working state when winter simultaneously, and may be for a long time in hot operation state during summer.Can cause thus the car multimedia integrated system construction cycle long, and need to expend a large amount of manpower and materials and carry out road surface test.
Utility model content
For the deficiency in above-mentioned technology, the utility model provides the circuit of a kind of automobile audio-video and multimedia integrated system test, this circuit can not need manually operated, can under high temperature or low temperature condition, work, and can shorten the multimedia integrated system construction cycle, reduce the road surface test duration.
For solving the problems of the technologies described above, the utility model is realized by following scheme: a kind of circuit for automobile audio-video and multimedia integrated system test, comprise a master control IC, and also comprise:
Be connected to the ACC control circuit of testing apparatus;
Be connected to IO mouth LED display circuit, key press detecting circuit, the Nixie tube drive circuit of master control IC;
Current detection circuit, the CON3 socket connecting test equipment of described current detection circuit, SDA/SCL end connects the I of master control IC
2c port.
Further, described master control IC adopt in 10 above microcontroller STM8S208 that touch number conversion and CAN bus.
Further, in described ACC control circuit, be connected with 2N3904 triode, the resistance R 25 of this 2N3904 triode input end b contact resistance 1K Ω, output terminal c connects the resistance R 23 of 47K Ω, the resistance R 24 of 47K Ω, described resistance R 23 is in parallel with resistance R 24,2N3904 triode e holds ground connection, is connected with the resistance R 10 of 10K Ω between described 2N3904 triode b, e end, and described resistance R 23 is connected on blocking effect pipe A04403 with the negative pole end of resistance R 24.
Further, described LED display circuit is provided with red, blue LED lamp in parallel, and red, blue LED lamp connects respectively the resistance R 94 of 1K Ω, the resistance R 93 of 1K Ω, and resistance R 94, resistance R 93 connect 3.3V power supply.
Further, described key press detecting circuit is provided with button SW1, and this button SW1 is parallel with the capacitor C 4 of 1nF, rear negative pole end ground connection in parallel, and rear positive terminal in parallel connects the resistance R 18 of 10K Ω.
Further, the display screen connecting in described Nixie tube drive circuit adopts 6 charactrons.
Further, in the circuit of described current detection circuit, be connected with flash current sense amplifier MAX9611.
Further, between the RS+ of described amplifier MAX9611 end, RS-end, be connected with in parallel and be all resistance R 41, the R44 of 0.2K Ω, two resistance positive terminals connection 12VDCN power supplys in parallel, negative pole end gang socket CON3.
Further, described amplifier MAX9611 set end SET connects resistance R 42, the resistance R 43 of 1.65K Ω, the capacitor C 15 of 1uF of 20K Ω, described resistance R 43, capacitor C 15 rear negative pole end ground connection in parallel, and resistance R 42 connects the power supply of 3.3V.
Further, the VCC of described amplifier MAX9611 end connects the power supply of 3.3V, and GND holds ground connection, and VCC holds the resistance R 39 that is connected with 10K Ω with SDA end, and VCC end holds with SCL the resistance R 40 that is connected with 10K Ω.
The beneficial effects of the utility model are:
1. each signal output can independently arrange the opening and closing time.
2. while testing, there are two kinds of mode of operations, the one, according to the fixedly opening and closing of the time interval that arrange, the signal intensity while simulating normal running; The 2nd, dynamically opening and closing within the time interval arranging, the signal intensity while simulating abnormal operation.
3. when simulating signal represents to require system under low dormant state, now start quiescent current and detect, if fail at the appointed time to reach the quiescent current of regulation, automatically stop test, show until testing time during fault, otherwise continue next round test.
4. the circuit of the utility model automobile audio-video and multimedia integrated system test, can be operated under the operating voltage and working environment same with multimedia integrated system, while having solved manual testing, and the test problem under high temperature and low temperature for a long time.
5. need to be in the problem that could find in two seasons of summer in winter in exploitation while on the way surveying yet.
6. adopt the circuit of the utility model automobile audio-video and multimedia integrated system test, after connecting with multimedia integrated system input, set test condition, test signal, put into constant temperature oven and carry out high low temperature reliability testing.
Accompanying drawing explanation
Fig. 1 is the ACC control circuit that the utility model is connected to testing apparatus.
Fig. 2 is the LED display circuit that the utility model is connected to the IO mouth of master control IC.
Fig. 3 is the key press detecting circuit that the utility model is connected to the IO mouth of master control IC.
Fig. 4 is the Nixie tube drive circuit that the utility model is connected to the IO mouth of master control IC.
Fig. 5 is the utility model current detection circuit.
Embodiment
Below in conjunction with accompanying drawing, the utility model is elaborated.
The circuit of this automobile audio-video and multimedia integrated system test is because signal major part on car is all the operating voltage higher than 12V, and microcontroller master control IC is generally operational in 3.3V ~ 5V left and right, therefore output signal need be carried out level conversion through transistor or relay.Circuit for automobile audio-video and multimedia integrated system test of the present utility model, it comprises a master control IC, also comprises: the ACC control circuit 1 that is connected to testing apparatus; Be connected to IO mouth LED display circuit 2, key press detecting circuit 3, the Nixie tube drive circuit 4 of master control IC; Current detection circuit 5, the CON3 socket connecting test equipment of described current detection circuit 5, SDA/SCL end connects the I of master control IC
2c port.In the circuit board at the utility model circuit place, have enough general input/output ports, in master control IC adopts with 10 above microcontroller STM8S208 that touch number conversion and CAN bus.
Please refer to accompanying drawing 1, Fig. 1 is the ACC control circuit that the utility model is connected to testing apparatus, in this circuit, be connected with 2N3904 triode, the resistance R 25 of this 2N3904 triode input end b contact resistance 1K Ω, output terminal c connects the resistance R 23 of 47K Ω, the resistance R 24 of 47K Ω, described resistance R 23 is in parallel with resistance R 24,2N3904 triode e holds ground connection, between described 2N3904 triode b, e end, be connected with the resistance R 10 of 10K Ω, described resistance R 23 is connected on blocking effect pipe A04403 with the negative pole end of resistance R 24.
Please refer to accompanying drawing 2, Fig. 2 is the LED display circuit 2 that the utility model is connected to the IO mouth of master control IC, in this circuit, be provided with red, blue LED lamp in parallel, red, blue LED lamp connects respectively the resistance R 94 of 1K Ω, the resistance R 93 of 1K Ω, and resistance R 94, resistance R 93 connect 3.3V power supply.
Please refer to accompanying drawing 3, Fig. 3 is the key press detecting circuit 3 that the utility model is connected to the IO mouth of master control IC, is provided with button SW1 in this circuit, and this button SW1 is parallel with the capacitor C 4 of 1nF, rear negative pole end ground connection in parallel, and rear positive terminal in parallel connects the resistance R 18 of 10K Ω.Gauge tap on car is manually operated, the utility model is to simulate this class control signal, therefore also need to have button and display screen that opening time and the shut-in time of these signals are set, with the light on and off of LED light, indicate the opening and closing of each signal, display screen adopts 6 charactrons, shows the number of times of test or the number of times of test crash etc.
Please refer to accompanying drawing 4, Fig. 4 is the Nixie tube drive circuit 4 that the utility model is connected to the IO mouth of master control IC, and the display screen connecting in this circuit adopts 6 charactrons.
Please refer to accompanying drawing 5, Fig. 5 is the utility model current detection circuit 5, in the circuit of described current detection circuit 5, be connected with flash current sense amplifier MAX9611, between the RS+ end of described amplifier MAX9611, RS-end, be connected with in parallel and be all resistance R 41, the R44 of 0.2K Ω, two resistance positive terminals in parallel connect 12VDCN power supply, negative pole end gang socket CON3; Described amplifier MAX9611 set end SET connects resistance R 42, the resistance R 43 of 1.65K Ω, the capacitor C 15 of 1uF of 20K Ω, described resistance R 43, capacitor C 15 rear negative pole end ground connection in parallel, and resistance R 42 connects the power supply of 3.3V; The VCC end of described amplifier MAX9611 connects the power supply of 3.3V, and GND holds ground connection, and VCC holds the resistance R 39 that is connected with 10K Ω with SDA end, and VCC end holds with SCL the resistance R 40 that is connected with 10K Ω.During automobile parking, on car, equipment is to be powered by the battery on car, and multimedia integrated system, must be in low power consumpting state when automobile parking as stereo set on car.Therefore also need the working current that detects testing apparatus to come the duty of judgment device and standby current whether to meet the demands.With flash current sense amplifier, MAX9611 realizes current sense function.Flash current sense amplifier MAX9611 is integrated 12 ADC and can be configured to the gain module of operational amplifier or comparer, be operated in the wider common mode input scope of 0V to 60V, wider dynamic range, accurate current measurement can be provided, and can select flexibly to examine the resistance of leakage resistance.12 of I2C interface accessing MAX9611 inside by master control IC, 500sps A/D converter (ADC) are for reading voltage (VSENSE), common mode input (VRSCM), the output of operational amplifier/comparer (VOUT), operational amplifier/comparator reference voltage (VSET) and the internal die temperature at inspection leakage resistance two ends.
The foregoing is only preferred implementation of the present utility model; not thereby limit the scope of the claims of the present utility model; every equivalent structure or conversion of equivalent flow process that utilizes the utility model instructions and accompanying drawing content to do; or be directly or indirectly used in other relevant technical field, be all in like manner included in scope of patent protection of the present utility model.
Claims (10)
1. for a circuit for automobile audio-video and multimedia integrated system test, comprise a master control IC, it is characterized in that, also comprise:
Be connected to the ACC control circuit (1) of testing apparatus;
Be connected to IO mouth LED display circuit (2), key press detecting circuit (3), the Nixie tube drive circuit (4) of master control IC;
Current detection circuit (5), the CON3 socket connecting test equipment of described current detection circuit (5), SDA/SCL end connects the I of master control IC
2c port.
2. a kind of circuit for the test of automobile audio-video and multimedia integrated system according to claim 1, is characterized in that: in described master control IC adopts with 10 above microcontroller STM8S208 that touch number conversion and CAN bus.
3. a kind of circuit for the test of automobile audio-video and multimedia integrated system according to claim 1, it is characterized in that: in described ACC control circuit (1), be connected with 2N3904 triode, the resistance R 25 of this 2N3904 triode input end b contact resistance 1K Ω, output terminal c connects the resistance R 23 of 47K Ω, the resistance R 24 of 47K Ω, described resistance R 23 is in parallel with resistance R 24, 2N3904 triode e holds ground connection, described 2N3904 triode b, between e end, be connected with the resistance R 10 of 10K Ω, described resistance R 23 is connected on blocking effect pipe A04403 with the negative pole end of resistance R 24.
4. a kind of circuit for the test of automobile audio-video and multimedia integrated system according to claim 1, it is characterized in that: described LED display circuit (2) is provided with red, blue LED lamp in parallel, red, blue LED lamp connects respectively the resistance R 94 of 1K Ω, the resistance R 93 of 1K Ω, and resistance R 94, resistance R 93 connect 3.3V power supply.
5. a kind of circuit for the test of automobile audio-video and multimedia integrated system according to claim 1, it is characterized in that: described key press detecting circuit (3) is provided with button SW1, this button SW1 is parallel with the capacitor C 4 of 1nF, negative pole end ground connection after in parallel, rear positive terminal in parallel connects the resistance R 18 of 10K Ω.
6. a kind of circuit for automobile audio-video and multimedia integrated system test according to claim 1, is characterized in that: the display screen connecting in described Nixie tube drive circuit (4) adopts 6 charactrons.
7. a kind of circuit for automobile audio-video and multimedia integrated system test according to claim 1, is characterized in that: in the circuit of described current detection circuit (5), be connected with flash current sense amplifier MAX9611.
8. a kind of circuit for the test of automobile audio-video and multimedia integrated system according to claim 7, it is characterized in that: between the RS+ of described amplifier MAX9611 end, RS-end, be connected with in parallel and be all resistance R 41, the R44 of 0.2K Ω, two resistance positive terminals in parallel connect 12VDCN power supply, negative pole end gang socket CON3.
9. a kind of circuit for the test of automobile audio-video and multimedia integrated system according to claim 7, it is characterized in that: described amplifier MAX9611 set end SET connects resistance R 42, the resistance R 43 of 1.65K Ω, the capacitor C 15 of 1uF of 20K Ω, described resistance R 43, capacitor C 15 rear negative pole end ground connection in parallel, resistance R 42 connects the power supply of 3.3V.
10. a kind of circuit for the test of automobile audio-video and multimedia integrated system according to claim 7, it is characterized in that: the VCC end of described amplifier MAX9611 connects the power supply of 3.3V, GND holds ground connection, VCC end holds with SDA the resistance R 39 that is connected with 10K Ω, and VCC end and SCL end are connected with the resistance R 40 of 10K Ω.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420205131.9U CN203811715U (en) | 2014-04-24 | 2014-04-24 | Circuit for test of automobile audio and video and multimedia integrated system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420205131.9U CN203811715U (en) | 2014-04-24 | 2014-04-24 | Circuit for test of automobile audio and video and multimedia integrated system |
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| Publication Number | Publication Date |
|---|---|
| CN203811715U true CN203811715U (en) | 2014-09-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201420205131.9U Expired - Fee Related CN203811715U (en) | 2014-04-24 | 2014-04-24 | Circuit for test of automobile audio and video and multimedia integrated system |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008285A (en) * | 2017-12-04 | 2018-05-08 | 丰顺县培英电声有限公司 | A kind of vehicle multimedia system test device and its method |
| CN108092230A (en) * | 2017-12-05 | 2018-05-29 | 中国电子科技集团公司第二十八研究所 | A kind of airborne power supply system of DC source |
| CN108490227A (en) * | 2018-06-26 | 2018-09-04 | 重庆力华科技有限责任公司 | A kind of vehicle mounted multimedia product test circuit of control line superposition communication test instruction |
-
2014
- 2014-04-24 CN CN201420205131.9U patent/CN203811715U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108008285A (en) * | 2017-12-04 | 2018-05-08 | 丰顺县培英电声有限公司 | A kind of vehicle multimedia system test device and its method |
| CN108092230A (en) * | 2017-12-05 | 2018-05-29 | 中国电子科技集团公司第二十八研究所 | A kind of airborne power supply system of DC source |
| CN108092230B (en) * | 2017-12-05 | 2019-10-29 | 中国电子科技集团公司第二十八研究所 | A kind of airborne power supply system of DC source |
| CN108490227A (en) * | 2018-06-26 | 2018-09-04 | 重庆力华科技有限责任公司 | A kind of vehicle mounted multimedia product test circuit of control line superposition communication test instruction |
| CN108490227B (en) * | 2018-06-26 | 2023-09-05 | 重庆力华科技有限责任公司 | Vehicle-mounted multimedia product test circuit with control line overlapped with communication test instruction |
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| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C41 | Transfer of patent application or patent right or utility model | ||
| TR01 | Transfer of patent right |
Effective date of registration: 20160629 Address after: 518000 Guangdong city of Shenzhen province Baoan District Xixiang City Road solid air garrison AFP Industrial Park Fl building on the third floor (301, 302) plant Patentee after: Shenzhen palm Sharp Electronics Co., Ltd. Address before: 518000, Nanshan District, Guangdong hi tech Industrial Park, South District, Shenzhen science and technology twelve South Road 2 Kingdee Software Park, B building 7, South 701 room Patentee before: Shenzhen Zhang Yixingtong Science and Technology Ltd. |
|
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140903 Termination date: 20180424 |