CN205374627U - Power supply state detection circuitry of on -vehicle air conditioner controller - Google Patents
Power supply state detection circuitry of on -vehicle air conditioner controller Download PDFInfo
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- CN205374627U CN205374627U CN201521119348.9U CN201521119348U CN205374627U CN 205374627 U CN205374627 U CN 205374627U CN 201521119348 U CN201521119348 U CN 201521119348U CN 205374627 U CN205374627 U CN 205374627U
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Abstract
The utility model discloses a power supply state detection circuitry of on -vehicle air conditioner controller, including battery powered line, an ignition wire, the 2nd ignition wire, still include treater and CAN transceiver module, the treater is including power supply input, ignition signal input, ignition steady voltage input and CAN bus communication end, battery powered line connection is connected to the ignition signal input to the power supply input of treater a, ignition wire through the steady voltage switch module, and the 2nd ignition wire passes through automobile body control module and connects ignition steady voltage input, and CAN transceiver module is connected to the CAN bus communication end, and the treater is according to the level signal decision operating condition of ignition signal input and CAN bus communication end. The utility model discloses a does power supply state detection circuitry of on -vehicle air conditioner controller connect DC through adopting DC constant voltage power supply's ignition wire comes the collection source as ignition signal, combines the CAN bus to judge the car fired state simultaneously, can effectively avoid the mistake identification problem of on -vehicle automatic air conditioner to automobile state.
Description
Technical field
The utility model relates to vehicle electronic device, particularly to the power supply state testing circuit of a kind of on-board air conditioner controller.
Background technology
The FATC(Full Automatic Temperature Controller having at present, automatic air conditioning controller of automobile) power supply mode have multiple, it is primarily present two kinds of power supply modes on existing market, the first is to be powered by storage battery power supply line (+B) and an igniting electric wire (Ignition), the low and high level of igniting electric wire determine the state of FATC.Another kind is then to be powered by storage battery power supply line (+B+Battery) and two igniting electric wires (IG1 and IG2 Ignition2), it can make the output that FATC still can be stable when automotive ignition, and it enters normal work (Normal) pattern or sleep (Sleep) pattern by power-up state or the power-down state of detection IG2.Generally by BCM(Body Control Module, car body control module) utilize relay and MOSFET to control being turned on or off of IG2, there is leakage current due to MOSFET when closed, cause the power supply state of FATC flase drop IG2 can not enter corresponding functional mode.
Summary of the invention
The purpose of this utility model is the defect in order to overcome above-mentioned background technology, it is provided that the power supply state testing circuit of a kind of on-board air conditioner controller.
The power supply state testing circuit of a kind of on-board air conditioner controller, including battery supply lines, the first ignition lead, second point live wire；Also including processor and CAN transceiver module, described processor includes energization input, ignition signal input, igniting voltage stabilizing input and CAN communication ends；Described battery supply lines is connected to the energization input of processor, described first ignition lead is connected to described ignition signal input by stabilized switch module, described second point live wire connects described igniting voltage stabilizing input by car body control module, described CAN communication ends connects described CAN transceiver module, and described processor determines duty according to the level signal of described ignition signal input and CAN communication ends.
Further, being provided with power supply detection module between described battery supply lines and described energization input, described power supply detection module is the first D/A converting circuit.
Further, it is provided with igniting detection module between described stabilized switch module and described ignition signal input, described igniting detection module includes the second analog to digital conversion circuit, the input of described second analog to digital conversion circuit and output connect described stabilized switch module and described ignition signal input respectively, being additionally provided with the relay being connected with described second analog to digital conversion circuit output inside described processor, described relay exports the level corresponding with ignition signal to described processor.
Further, it is provided with the 3rd analog to digital conversion circuit between described car body control module and described igniting voltage stabilizing input.
The power supply state testing circuit of on-board air conditioner controller of the present utility model, originated by the collection using the ignition lead connecting DC-DC voltage-stabilized power supply to be used as ignition signal, judge automotive ignition state in combination with CAN, the vehicle-mounted automatic air conditioner misrecognition problem to vehicle condition can be prevented effectively from.
Accompanying drawing explanation
Fig. 1 is the circuit module schematic diagram in an embodiment of the present utility model.
Detailed description of the invention
Below in conjunction with accompanying drawing, the power supply state testing circuit of a kind of on-board air conditioner controller of the present utility model is further described.
A kind of power supply state testing circuit of on-board air conditioner controller, as shown in Figure 1.Including battery supply lines+B, the first ignition lead IG1, second point live wire IG2, processor MCU, CAN transceiver module 2 and state detection module 1.Wherein state detection module 1 is divided into power supply detection module 11, igniting detection module 12 and voltage stabilizing detection module 13.These three state detection module 1 respectively with battery supply lines+B, the first ignition lead IG1 and second point live wire IG2 cooperating, thus read battery supply lines+B, the first ignition lead IG1 and the level state of second point live wire IG2 in real time.
In this automobile power supply mode, its battery supply lines+B, the first ignition lead IG1 and the on off operating mode of second point live wire IG2 and the position corresponding relation of automobile key are as follows:
| Key status | Accumulator line+B | Ignition lead IG1 | Ignition lead IG2 |
| OFF | ON | OFF | OFF |
| ACC | ON | OFF | OFF |
| ON | ON | ON | ON |
| CRANK | ON | ON | OFF |
As long as FATC can accurately identify this four key status, the duty of on-board air conditioner can be controlled exactly.Concrete, processor MCU includes energization input B_INT, ignition signal input IG1_INT, igniting voltage stabilizing input IG2_INT and CAN communication ends CAN_T, and it is mainly judged by the state of automobile by this four pin ports signal of telecommunication respectively.
Energization input B_INT aspect, it is corresponding with battery supply lines+B, before electromagnetism supply lines is connected to energization input B_INT, also need to connect power supply detection module 11, the input of this power supply detection module 11 connects electromagnetism supply lines, and its output then connects energization input B_INT, preferably, this power supply detection module 11 is the first D/A converting circuit, and it is transferred to processor MCU after voltage of battery supply lines+B is converted from analog into data signal.Processor MCU then judges the state of battery supply lines+B according to the size of energization input B_INT voltage.Being normal voltage supplied when battery supply lines+B normal power supply, therefore energization input B_INT should be stable.
Ignition signal input IG1_INT aspect, it is corresponding with the first ignition lead IG1, and FATC is also that the signal of main power-up state or power-down state and CAN by detecting the first ignition lead IG1 controls on-board air conditioner entrance normal mode of operation or sleep pattern.Wherein, it is connected between the first ignition lead IG1 with ignition signal input IG1_INT and has igniting detection module 12, be used for judging fired state.In the present embodiment, this igniting detection module 12 is the second analog to digital conversion circuit, and the second analog to digital conversion circuit input connects the first ignition lead IG1.In order to ensure stablizing of the first ignition lead IG1 output voltage, second analog to digital conversion circuit output is also connected with a relay, this relay is arranged on inside processor, it is to the internal outputs level signals of processor, this level signal is then corresponding with the signal of the second analog to digital conversion circuit output, represent that the first ignition lead is in power-up state when relay output high level, otherwise be then in power-down state.Owing to the first ignition lead front end carries out voltage stabilizing adjustment by the stabilized switch module of DC-DC, therefore the signal exported through the backward ignition signal of the second D/A converting circuit conversion is the most highly stable, therefore occur that the probability that processor MCU misidentifies is the lowest, it is possible to judge the power-up state of this first ignition lead IG1 exactly.
Igniting voltage stabilizing input IG2_INT aspect, corresponding with second point live wire IG2, it is connected between second point live wire IG2 with igniting voltage stabilizing input IG2_INT and has car body control module and voltage stabilizing detection module, the voltage stabilizing detection module 13 of the present embodiment is the 3rd analog to digital conversion circuit, car body control module only just has work when automobile is under launch state, the most just can outside output voltage, after the 3rd analog to digital conversion circuit conversion, then picture point fire voltage stabilizing input IG2_INT exports high level signal.
In other embodiments, if being built-in with corresponding analog-to-digital conversion module inside processor, in order to simplify circuit design, it is possible to use built-in analog-to-digital conversion module replaces the state detection module 1 being arranged on outside processor, reach to simplify circuit, improve the purpose of integrated level.
CAN communication ends CAN_T connects CAN transceiver module 2, and it is used for judging that current vehicle key is whether as the state in Crank state, i.e. automotive ignition.
Thus, can tell, by above-mentioned circuit structure, the state that automobile is presently in accurately, and effectively prevent the misrecognition phenomenon of vehicle condition.
Above in conjunction with accompanying drawing, embodiment of the present utility model is explained in detail, but the utility model is not limited to above-mentioned embodiment, in the ken that those of ordinary skill in the art are possessed, it is also possible on the premise of without departing from the utility model objective, various changes can be made.
Claims (4)
1. a power supply state testing circuit for on-board air conditioner controller, including battery supply lines, the first ignition lead, second point live wire；It is characterized in that: also include processor and CAN transceiver module, described processor includes energization input, ignition signal input, igniting voltage stabilizing input and CAN communication ends；Described battery supply lines is connected to the energization input of processor, described first ignition lead is connected to described ignition signal input by stabilized switch module, described second point live wire connects described igniting voltage stabilizing input by car body control module, described CAN communication ends connects described CAN transceiver module, and described processor determines duty according to the level signal of described ignition signal input and CAN communication ends.
2. testing circuit as claimed in claim 1, it is characterised in that being provided with power supply detection module between described battery supply lines and described energization input, described power supply detection module is the first D/A converting circuit.
3. testing circuit as claimed in claim 1, it is characterized in that, it is provided with igniting detection module between described stabilized switch module and described ignition signal input, described igniting detection module includes the second analog to digital conversion circuit, the input of described second analog to digital conversion circuit and output connect described stabilized switch module and described ignition signal input respectively, being additionally provided with the relay being connected with described second analog to digital conversion circuit output inside described processor, described relay exports the level corresponding with ignition signal to described processor.
4. testing circuit as claimed in claim 1, it is characterised in that be provided with the 3rd analog to digital conversion circuit between described car body control module and described igniting voltage stabilizing input.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521119348.9U CN205374627U (en) | 2015-12-30 | 2015-12-30 | Power supply state detection circuitry of on -vehicle air conditioner controller |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201521119348.9U CN205374627U (en) | 2015-12-30 | 2015-12-30 | Power supply state detection circuitry of on -vehicle air conditioner controller |
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| CN205374627U true CN205374627U (en) | 2016-07-06 |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109398307A (en) * | 2017-08-18 | 2019-03-01 | 法雷奥汽车内部控制（深圳）有限公司 | Keyless entry and activation system and the method for improving the security of system |
| CN110618723A (en) * | 2018-06-20 | 2019-12-27 | 比亚迪股份有限公司 | Vehicle-mounted electronic system, voltage self-adaptive control method thereof and vehicle |
| CN115313550A (en) * | 2022-08-09 | 2022-11-08 | 基洛智能（深圳）有限公司 | Intelligent power supply method for vehicle-mounted electronic equipment |
-
2015
- 2015-12-30 CN CN201521119348.9U patent/CN205374627U/en active Active
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109398307A (en) * | 2017-08-18 | 2019-03-01 | 法雷奥汽车内部控制（深圳）有限公司 | Keyless entry and activation system and the method for improving the security of system |
| CN109398307B (en) * | 2017-08-18 | 2022-06-28 | 法雷奥汽车内部控制（深圳）有限公司 | Keyless entry and start system and method for improving security of keyless entry and start system |
| CN110618723A (en) * | 2018-06-20 | 2019-12-27 | 比亚迪股份有限公司 | Vehicle-mounted electronic system, voltage self-adaptive control method thereof and vehicle |
| CN110618723B (en) * | 2018-06-20 | 2021-08-10 | 比亚迪股份有限公司 | Vehicle-mounted electronic system, voltage self-adaptive control method thereof and vehicle |
| CN115313550A (en) * | 2022-08-09 | 2022-11-08 | 基洛智能（深圳）有限公司 | Intelligent power supply method for vehicle-mounted electronic equipment |
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