CN103675550A - General performance test load box for car radio cassette player - Google Patents
General performance test load box for car radio cassette player Download PDFInfo
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- CN103675550A CN103675550A CN201310700826.4A CN201310700826A CN103675550A CN 103675550 A CN103675550 A CN 103675550A CN 201310700826 A CN201310700826 A CN 201310700826A CN 103675550 A CN103675550 A CN 103675550A
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Abstract
The invention relates to a test device for a tested car radio cassette player, in particular to a general performance test load box for a car radio cassette player. The general performance test load box for the car radio cassette player comprises a power module, a load module, a single-chip microcomputer module, a dark current detection module and a display module. The power module is used for providing a power source for the single-chip microcomputer module, the load module is used for making a load connected in, and the load module is switched through a touch switch and a relay under the control of the single-chip microcomputer module. The single-chip microcomputer module serves as the core component and is responsible for receiving input signals and output control signals. The dark current detection module is used for detecting a dark current of the tested radio cassette player and outputting detected dark current sampling signals to the single-chip microcomputer module under the control of the control signals output by the single-chip microcomputer module. The display module is used for displaying test power source voltage and the dark current of the tested radio cassette player which are output by the single-chip microcomputer module. The general performance test load box for the car radio cassette player is multifunctional, durable in use, high in reliability, capable of effectively protecting the tested radio cassette player, high in production efficiency, capable of saving development cost, easy to popularize and apply and the like.
Description
Technical field
The present invention relates to the tested radio and tape player testing apparatus of a kind of automobile, particularly a kind of general automobile radio and tape player performance test load box.
Background technology
The tested radio and tape player performance test of existing automobile load box generally has the following disadvantages:
1. function singleness, the fictitious load in the time of can only be as tested radio and tape player test is used; And using mechanical switch as the selection switching of load, the switching of test event, mechanical switch is fragile, easily causes malfunction; 2. test simulation amount needs additional instrument to measure; 3. some circuit protections that there is no need easily cause the damage of tested radio and tape player when producing.
Summary of the invention
The technical problem to be solved in the present invention is: provide a kind of general automobile radio and tape player performance test load box, to solve the function singleness that prior art exists, the weak point that easily causes malfunction.
The technical scheme solving the problems of the technologies described above is: a kind of general automobile radio and tape player performance test load box, comprise power module, load blocks, one-chip computer module, dark current detection module, display module,
Described power module is used to one-chip computer module that power supply is provided, and this power module is connected with the power end of one-chip computer module;
Described load blocks is used for providing load access, and by touch-switch and relay switch, selects load, switch test project under the control of one-chip computer module, and this load blocks is connected with the input/output terminal of one-chip computer module;
Described one-chip computer module, as core component, is responsible for receiving input signal and output control signal;
Described dark current detection module, under controlling in the control signal of one-chip computer module output, detects the dark current of tested radio and tape player and exports the dark current sampled signal detecting to one-chip computer module; This dark current detection module is connected with the input/output terminal of one-chip computer module;
Described display module is for showing testing power supply voltage and the tested radio and tape player dark current of one-chip computer module output, and this display module is connected with the output terminal of one-chip computer module.
Further technical scheme of the present invention is: described dark current detection module comprises electronic switch, sampling resistor and wave filter, the input end of described electronic switch is connected with the output terminal of one-chip computer module, another input end of electronic switch is also connected with tested radio and tape player, the output terminal of electronic switch is connected with the input end of sampling resistor, the output terminal of sampling resistor is connected with the input end of wave filter, and the output terminal of wave filter is connected with the input end of one-chip computer module.
Further technical scheme again of the present invention is: this load box also includes overcurrent protection module, under controlling in the control signal of one-chip computer module output, overcurrent, short circuit phenomenon are carried out to overcurrent protection, and export overcurrent protection detection signal to one-chip computer module; This overcurrent protection module is connected with the input/output terminal of one-chip computer module.
Further technical scheme again of the present invention is: described overcurrent protection module comprises reset circuit, electronic switch, current sampling resistor and sampling comparator circuit, described reset circuit, the input end of electronic switch respectively with the output terminal of one-chip computer module, the output terminal of power supply connects, another input end of electronic switch is connected with tested radio and tape player, the output terminal of electronic switch respectively with current sampling resistor, sampling comparator circuit connects, after the sampling output terminal of comparator circuit and the output terminal parallel connection of reset circuit, be connected with reset circuit, reset circuit is connected with the input end of one-chip computer module.
Further technical scheme again of the present invention is: this load box also includes ILL abnormity of power supply detection module, this ILL abnormity of power supply detection module for detection of vehicle when not opening ILL power supply, because the fault of radio and tape player causes radio and tape player that the situation of power supply is provided to all the other equipment that are connected with ILL power supply on vehicle; This ILL abnormity of power supply detection module is connected with the input end of one-chip computer module.
Further technical scheme again of the present invention is: this load box also includes alarm display module, and this alarm display module is connected with the output terminal of one-chip computer module, for carry out audible alarm and screen display under abnormal conditions.
Further technical scheme again of the present invention is: this load box also includes lighting simulation module, quick break-make for simulated automotive electric control lock, and tested radio and tape player supply voltage falling waveform during automobile starting, this lighting simulation module is connected with the output terminal of one-chip computer module.
Further technical scheme of the present invention is: described lighting simulation module comprises wave filter, adjusts pipe and comparer, the input end of described wave filter is connected with the output terminal of one-chip computer module, the output terminal of wave filter is connected with adjustment pipe, adjust pipe and be connected with comparer, comparer is connected with tested radio and tape player; The control signal of one-chip computer module output is exported DC signal after filter filtering, through adjustment pipe, comparer, exports different voltage to tested radio and tape player.
Owing to adopting said structure, the present invention's general automobile radio and tape player performance test load box has following beneficial effect:
1. functional diversities, durable, reliability is high:
Owing to present invention includes power module, load blocks, one-chip computer module, dark current detection module, display module, overcurrent protection module, ILL abnormity of power supply detection module, alarm display module, lighting simulation module; therefore; the fictitious load of the present invention when as the test of tested radio and tape player with; also can realize the function of dark current detection, overcurrent protection, the detection of ILL abnormity of power supply, alarm indication, lighting simulation, its functional diversities.And because having used one-chip computer module, the present invention comes the switching of control load module and the switching of function in conjunction with touch-switch and relay, be swift in response, can by different programs, reach different functions, by touch-switch, operate, durable, reliability is high.
2. can effectively protect tested radio and tape player:
Owing to having the present invention includes overcurrent protection module; the current sampling resistor sampled signal of this overcurrent protection module compares by the reference value of sampling comparator circuit and setting; if higher than reference value; output signal to immediately electronic switch; cut-out radio and tape player is connected with power supply; one-chip computer module is received the signal of comparator circuit output simultaneously, output alarm signal, thus can effectively protect tested radio and tape player.
3. production efficiency is high:
The overcurrent protection causing because of reasons such as short circuits that the present invention occurs in process of production, and ILL has chimes of doom and corresponding demonstration extremely, detecting dark current only needs just can complete by a button, and test is accurate, and speed is fast.
4. save tooling device cost of development:
The present invention in process of production available same load box of different station work completes different Function detection, avoided test simulation amount to need additional instrument could measure, the need exploitation of also having avoided causing due to function singleness is purchased cycle and the cost of a plurality of tooling devices.
In addition, because this load box supply voltage that also simulated automotive igniting causes reduces waveform, do not need expensive special test equipment just can test this function at production line.
Below, in conjunction with the accompanying drawings and embodiments the technical characterictic of the present invention's general automobile radio and tape player performance test load box is further described.
Accompanying drawing explanation
Fig. 1: the functional block diagram of the present invention's general automobile radio and tape player performance test load box,
Fig. 2: the circuit diagram of dark current detection module,
Fig. 3: the circuit diagram of overcurrent protection module,
Fig. 4: the circuit diagram of lighting simulation module.
Embodiment
Embodiment mono-:
General automobile radio and tape player performance test load box (functional block diagram is referring to Fig. 1) comprises power module, load blocks, one-chip computer module, dark current detection module, display module, stream protection module, ILL abnormity of power supply detection module, alarm display module, a lighting simulation module, wherein:
Described power module is used to one-chip computer module that power supply is provided, and this power module is connected with the input end of one-chip computer module;
Described load blocks comprises high-power wire-wound resistor, be used for providing load access, and by touch-switch and relay switch, select load, switch test project under the control of one-chip computer module, this load blocks is connected with the input/output terminal of one-chip computer module;
Described one-chip computer module, as core component, is responsible for receiving input signal and output control signal;
Described dark current detection module, under controlling in the control signal of one-chip computer module output, detects the dark current of tested radio and tape player and exports the dark current sampled signal detecting to one-chip computer module; This dark current detection module is connected with the input/output terminal of one-chip computer module; Described dark current detection module comprises electronic switch, sampling resistor and wave filter (as shown in Figure 2), the input end of described electronic switch is connected with the output terminal of one-chip computer module, another input end of electronic switch is also connected with tested radio and tape player, the output terminal of electronic switch is connected with the input end of sampling resistor, the output terminal of sampling resistor is connected with the input end of wave filter, and the output terminal of wave filter is connected with the input end of one-chip computer module; During work, electronic switch receives Single-chip Controlling signal, the circuit between the tested radio and tape player of conducting and sampling resistor, and wave filter will export one-chip computer module to after the dark current sampled signal filtering of sampling resistor.
Described display module is for showing testing power supply voltage and the tested radio and tape player dark current of one-chip computer module output, and this display module is connected with the output terminal of one-chip computer module.
Described overcurrent protection module, under controlling in the control signal of one-chip computer module output, carries out overcurrent protection to short circuit phenomenon, and exports overcurrent protection detection signal to one-chip computer module, this overcurrent protection module is connected with the input/output terminal of one-chip computer module, this overcurrent protection module comprises reset circuit, electronic switch, current sampling resistor and sampling comparator circuit (as shown in Figure 3), described reset circuit, the input end of electronic switch respectively with the output terminal of one-chip computer module, the output terminal of power supply connects, another input end of electronic switch is connected with tested radio and tape player, the output terminal of electronic switch respectively with current sampling resistor, sampling comparator circuit connects, after the sampling output terminal of comparator circuit and the output terminal parallel connection of reset circuit, be connected with reset circuit, reset circuit is connected with the input end of one-chip computer module, the electric current adjustable extent 0-20 ampere of overcurrent protection, during work, current sampling resistor sampled signal compares by the reference value of sampling comparator circuit and setting, if higher than reference value, output signal to immediately electronic switch, cut-out radio and tape player is connected with power supply, one-chip computer module is received the signal of comparator circuit output simultaneously, output alarm signal.
Described ILL abnormity of power supply detection module, for detection of vehicle when not opening ILL power supply, because the fault of radio and tape player causes radio and tape player that the situation of power supply is provided to all the other equipment that are connected with ILL power supply on vehicle; This ILL abnormity of power supply detection module is connected with the input end of one-chip computer module.
Described alarm display module is connected with the output terminal of one-chip computer module, for carry out audible alarm and screen display under abnormal conditions.
Described lighting simulation module, for the quick break-make of simulated automotive electric control lock, and tested radio and tape player supply voltage falling waveform during automobile starting, this lighting simulation module is connected with the output terminal of one-chip computer module.This lighting simulation module comprises wave filter, adjusts pipe and comparer (as shown in Figure 4), described wave filter is low-pass filter, the input end of this wave filter is connected with the output terminal of one-chip computer module, the output terminal of wave filter is connected with adjustment pipe, adjust pipe and be connected with comparer, comparer is connected with tested radio and tape player; The control signal of one-chip computer module output is exported DC signal after filter filtering, through adjustment pipe, comparer, exports different voltage to tested radio and tape player, thereby realize simulation, lights a fire.
Claims (8)
1. a general automobile radio and tape player performance test load box, is characterized in that: comprise power module, load blocks, one-chip computer module, dark current detection module, display module,
Described power module is used to one-chip computer module that power supply is provided, and this power module is connected with the power end of one-chip computer module;
Described load blocks is used for providing load access, and by touch-switch and relay switch, selects load, switch test project under the control of one-chip computer module, and this load blocks is connected with the input/output terminal of one-chip computer module;
Described one-chip computer module, as core component, is responsible for receiving input signal and output control signal;
Described dark current detection module, under controlling in the control signal of one-chip computer module output, detects the dark current of tested radio and tape player and exports the dark current sampled signal detecting to one-chip computer module; This dark current detection module is connected with the input/output terminal of one-chip computer module;
Described display module is for showing testing power supply voltage and the tested radio and tape player dark current of one-chip computer module output, and this display module is connected with the output terminal of one-chip computer module.
2. general automobile radio and tape player performance test load box according to claim 1, it is characterized in that: described dark current detection module comprises electronic switch, sampling resistor and wave filter, the input end of described electronic switch is connected with the output terminal of one-chip computer module, another input end of electronic switch is also connected with tested radio and tape player, the output terminal of electronic switch is connected with the input end of sampling resistor, the output terminal of sampling resistor is connected with the input end of wave filter, and the output terminal of wave filter is connected with the input end of one-chip computer module.
3. general automobile radio and tape player performance test load box according to claim 1, it is characterized in that: this load box also includes overcurrent protection module, under controlling in the control signal of one-chip computer module output, overcurrent, short circuit phenomenon are carried out to overcurrent protection, and export overcurrent protection detection signal to one-chip computer module; This overcurrent protection module is connected with the input/output terminal of one-chip computer module.
4. general automobile radio and tape player performance test load box according to claim 1, it is characterized in that: described overcurrent protection module comprises reset circuit, electronic switch, current sampling resistor and sampling comparator circuit, described reset circuit, the input end of electronic switch respectively with the output terminal of one-chip computer module, the output terminal of power supply connects, another input end of electronic switch is connected with tested radio and tape player, the output terminal of electronic switch respectively with current sampling resistor, sampling comparator circuit connects, after the sampling output terminal of comparator circuit and the output terminal parallel connection of reset circuit, be connected with reset circuit, reset circuit is connected with the input end of one-chip computer module.
5. general automobile radio and tape player performance test load box according to claim 1, it is characterized in that: this load box also includes ILL abnormity of power supply detection module, this ILL abnormity of power supply detection module for detection of vehicle when not opening ILL power supply, because the fault of radio and tape player causes radio and tape player that the situation of power supply is provided to all the other equipment that are connected with ILL power supply on vehicle; This ILL abnormity of power supply detection module is connected with the input end of one-chip computer module.
6. general automobile radio and tape player performance test load box according to claim 1, it is characterized in that: this load box also includes alarm display module, this alarm display module is connected with the output terminal of one-chip computer module, for carry out audible alarm and screen display under abnormal conditions.
7. according to the general automobile radio and tape player performance test load box described in the arbitrary claim of claim 1 to 6, it is characterized in that: this load box also includes lighting simulation module, quick break-make for simulated automotive electric control lock, and tested radio and tape player supply voltage falling waveform during automobile starting, this lighting simulation module is connected with the output terminal of one-chip computer module.
8. according to the general automobile radio and tape player performance test load box described in the arbitrary claim of claim 7, it is characterized in that: described lighting simulation module comprises wave filter, adjusts pipe and comparer, the input end of described wave filter is connected with the output terminal of one-chip computer module, the output terminal of wave filter is connected with adjustment pipe, adjust pipe and be connected with comparer, comparer is connected with tested radio and tape player; The control signal of one-chip computer module output is exported DC signal after filter filtering, through adjustment pipe, comparer, exports different voltage to tested radio and tape player.
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| CN201310700826.4A CN103675550B (en) | 2013-12-16 | 2013-12-16 | General automobile radio and tape player performance test load box |
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| CN201310700826.4A CN103675550B (en) | 2013-12-16 | 2013-12-16 | General automobile radio and tape player performance test load box |
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| CN103675550A true CN103675550A (en) | 2014-03-26 |
| CN103675550B CN103675550B (en) | 2016-05-25 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108196145A (en) * | 2017-12-22 | 2018-06-22 | 台州市路桥豪达汽车电器有限公司 | Automobile electric performance test method and system |
| CN109725194A (en) * | 2019-01-23 | 2019-05-07 | 黑龙江省计量检定测试研究院 | Portable car-mounted navigation audio-video system energy consumption testing instrument |
| CN111693814A (en) * | 2020-06-23 | 2020-09-22 | 东风汽车有限公司 | Vehicle-mounted load data acquisition system and data acquisition method |
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| CN111693814A (en) * | 2020-06-23 | 2020-09-22 | 东风汽车有限公司 | Vehicle-mounted load data acquisition system and data acquisition method |
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| CN103675550B (en) | 2016-05-25 |
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