CN201548643U - Load open circuit or short circuit detecting system for vehicle controller - Google Patents
Load open circuit or short circuit detecting system for vehicle controller Download PDFInfo
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- CN201548643U CN201548643U CN2009200746613U CN200920074661U CN201548643U CN 201548643 U CN201548643 U CN 201548643U CN 2009200746613 U CN2009200746613 U CN 2009200746613U CN 200920074661 U CN200920074661 U CN 200920074661U CN 201548643 U CN201548643 U CN 201548643U
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Abstract
The utility model discloses a load open circuit or short circuit detecting system for a vehicle controller, comprising a microcontroller, a power supply and voltage monitoring circuit, a load current detecting circuit, a load drive circuit and a fault warning circuit, wherein the microcontroller obtains a real-time load impedance value after operating according to real-time working voltage analog voltage signals sent by the power supply and voltage monitoring circuit and real-time load current analog voltage signals sent by the load current detecting circuit; and the microcontroller leads the real-time load impedance value to be compared with the setting of the corresponding warning door limit impedance value and outputs the corresponding open circuit or short circuit warning signal according to the compared result to an alarming control I/O port. The system is difficult to generate misjudgment when the power supply and voltage is abnormal.
Description
Technical field
The utility model relates to automotive electronic technology, particularly the car body controller load open, the short trouble detection system.
Background technology
All kinds of electric faults appear in vehicle in using driving process be inevitable (as the open circuit of wire harness or electrical load, short circuit etc.), how in time to find and take safeguard measure to remind simultaneously that the user is the key that guarantees vehicle driving safety.Car body controller (BCM) is being controlled the work of most electrical load on the vehicle as one of important electronic unit of car load; can in time find and diagnose as the electric fault of each external circuit of load and take the corresponding protection measure; in time reminding the user to note, is one of most important functions of car body controller (BCM).Detection as the external circuit of load thus the barrier conventional method be that the output current of the output port of the load driving circuits that connects by the inspection vehicle body controller is judged the duty as the outside electrical equipment of load, if electric current just thinks that greater than certain scope outside electrical equipment (or wire harness) has short circuit, if just think that less than a certain scope outside electrical equipment may open a way.The existing problem of this method is that output current also can change when the load driving circuits supply voltage changes, and might can produce erroneous judgement when supply voltage is unusual.
The utility model content
The technical problems to be solved in the utility model provides that a kind of car body controller load is opened, the short trouble detection system, is difficult for producing erroneous judgement when supply voltage is unusual.
For solving the problems of the technologies described above, car body controller load of the present utility model is opened, the short trouble detection system, comprising: microcontroller, supply voltage monitoring circuit, load current detection circuit, load driving circuits, fault warning circuit;
Described supply voltage monitoring circuit is used for gathering in real time the operating voltage of the load of car body controller, exports the A/D port of a real-time working voltage analog voltage signal to microcontroller;
Described load current detection circuit is used to detect load current, and output one real-time load current analog voltage signal is to another A/D port of microcontroller;
Described load driving circuits, the drive controlling I/O port of one termination microcontroller, the working voltage source of the load of one termination car body controller, each external loading of output termination, when the drive controlling I/O of microcontroller port not during output drive signal, the connection that the working voltage source that described load driving circuits control disconnects the load of car body controller arrives described output terminal, when the drive controlling I/O of microcontroller port output drive signal, the working voltage source that the load of car body controller is connected in described load driving circuits control arrives described output terminal;
Described fault warning circuit connects the alarm control I/O port of microcontroller, carries out alarm prompt according to the open circuit or the short circuit alarm signal of the output of alarm control I/O port;
The real-time load current analog voltage signal that real-time working voltage analog voltage signal that described microcontroller transmits according to described supply voltage monitoring circuit and load current detection circuit transmit carries out obtaining real-time load impedance value after the computing, microcontroller compares described real-time load impedance value with setting corresponding alarming threshold resistance value, export corresponding open circuit or short circuit alarm signal to alarm control I/O port according to comparative result.
Described load driving circuits can also comprise short-circuit protection circuit; described short-circuit protection circuit connects the alarm control I/O port of microcontroller; when the drive controlling I/O of microcontroller port not during output drive signal; the connection that the working voltage source that described load driving circuits control disconnects the load of car body controller arrives described output terminal; when the drive controlling I/O of microcontroller port output drive signal and the alarm control I/O port that connects microcontroller not during the output load short-circuit signal; the working voltage source that the load of car body controller is connected in described load driving circuits control arrives described output terminal; when the alarm control I/O of microcontroller port output short-circuit alarm signal, the connection that the working voltage source that described load driving circuits control disconnects the load of car body controller arrives described output terminal.
The rated operational voltage of external loading that described load driving circuits connects and the rated power of each external loading can be arranged in the memory write in the described microcontroller, microcontroller is with described real-time load impedance value, compare with the corresponding alarming threshold resistance value of setting according to the rated power of the rated operational voltage of external loading that described load driving circuits connects and each external loading, export corresponding open circuit or the short circuit alarm signal is controlled the I/O port to alarm according to comparative result.
Car body controller of the present utility model (BCM) load is opened, the short trouble detection system, the working voltage source voltage and the load current value of the load by while inspection vehicle body controller, high-speed computation by MCU inside, obtain the load impedance value on the output terminal that load driving circuits connects each external loading, compare with the alarming threshold resistance value of setting then, judge the open circuit or the short circuit of external circuit, export corresponding open circuit or short circuit alarm signal to alarm control I/O port according to comparative result, if be judged to be load open circuit, just send sound and light alarm, remind the user in time to check, if be judged to be short circuit, with regard to the working power of disconnecting external load immediately, and send sound and light alarm, remind the user in time to check.Because load current changes with supply voltage, so traditional passing through detects current methods judgement external loading and opens, the erroneous judgement that can cause owing to the shakiness of supply voltage during short trouble, and the resistance of (temperature-resistant) load is not with change in voltage under general state, so car body controller of the present utility model (BCM) load is opened, the short trouble detection system, adopt the variation that detects the output port pull-up resistor to judge the fault type of output port, can be more accurate, can fundamentally solve the existing problem that when supply voltage is unusual, may produce erroneous judgement of classic method.
Description of drawings
The utility model is described in further detail below in conjunction with the drawings and specific embodiments.
Fig. 1 is that car body controller load of the present utility model is opened, short trouble detection system one embodiment synoptic diagram.
Embodiment
Car body controller of the present utility model (BCM) load is opened, short trouble detection system one embodiment as shown in Figure 1, mainly comprise: microcontroller (MCU), supply voltage monitoring circuit, load current detection circuit, load driving circuits, fault warning circuit, periphery are supported circuit.
The working voltage source Vcc of the load of described supply voltage monitoring circuit one termination car body controller, an A/D port of a termination microcontroller (MCU) is used for gathering in real time the operating voltage of the load of car body controller.The operating voltage of the load of car body controller is passed through supply voltage monitoring circuit; after electric resistance partial pressure, signal condition and clamped protection; export a real-time working voltage analog voltage signal and carry out mould/number conversion to an A/D port of microcontroller (MCU); make one of foundation of fault judgement, participate in microcontroller (MCU) computing.
Described load current detection circuit is used to detect load current, and output one real-time load current analog voltage signal is to another A/D port of microcontroller (MCU).Load current detection circuit is by current ratio sensor load current and convert voltage signal to; after signal condition and clamped protection; another A/D port of delivering to microcontroller (MCU) carries out mould/number conversion, makes one of foundation of fault judgement, participates in microcontroller (MCU) computing.
Described load driving circuits; the drive controlling I/O port of one termination microcontroller (MCU); the working voltage source of the load of one termination car body controller; each external loading of output termination; described load driving circuits can also comprise short-circuit protection circuit; described short-circuit protection circuit connects the alarm control I/O port of microcontroller (MCU); when the drive controlling I/O port of microcontroller (MCU) not during output drive signal; the connection that the working voltage source that described load driving circuits control disconnects the load of car body controller arrives described output terminal; when the drive controlling I/O port output drive signal of microcontroller (MCU) and the alarm control I/O port that connects microcontroller (MCU) not during the output load short-circuit signal; the working voltage source that the load of car body controller is connected in described load driving circuits control arrives described output terminal; when the alarm control I/O of microcontroller (MCU) port output short-circuit alarm signal, the connection that the working voltage source that described load driving circuits control disconnects the load of car body controller arrives described output terminal.
Described fault warning circuit connects the alarm control I/O port of microcontroller (MCU), carries out alarm prompt according to the open circuit or the short circuit alarm signal of the output of alarm control I/O port, as reminding the user by sound, light etc.
Storer in the described microcontroller (MCU) (EEPROM for example, EEPROM (Electrically Erasable Programmable Read Only Memo)) with the rated operational voltage of external loading that described load driving circuits connects and the rated power of each external loading, microcontroller (MCU) carries out obtaining real-time load impedance value after the computing according to the operating voltage signal and the real-time detected load current signal of described load current detection circuit of the load that described supply voltage monitoring circuit real-time monitors, microcontroller (MCU) is with described real-time load impedance value, compare with the corresponding alarming threshold resistance value of setting according to the rated operational voltage of described external loading and rated power, export corresponding open circuit or short circuit alarm signal to alarm control I/O port according to comparative result.
Described periphery supports circuit mainly to finish the acquisition process to other all kinds of MCU input control signals.
One embodiment is as follows.
When doing fault detect at every turn, described supply voltage monitoring circuit detects the real-time working voltage V of the load of car body controller, described load current detection circuit detects real-time load current I, microcontroller (MCU) carries out obtaining real-time load impedance value: R=V/I after the computing so, described load driving circuits, output terminal is connected to the individual external loading of n (n is a positive integer), and the rated operational voltage of n external loading is V
Cc, rated power is respectively P
1, P
2, P
3..., Pn, microcontroller (MCU) is with described real-time load impedance value, compare with the corresponding alarming threshold resistance value of setting according to the rated operational voltage and the rated power of described external loading, output open circuit or short circuit alarm signal are to alarm control I/O port.
Concrete decision procedure is as follows.
The judgement of load open circuit:
Output terminal has only a single load, and (rated operational voltage is V
Cc, rated power is P
1), promptly during n=1, if V/I＞2 (V
Cc/ P
1) just think that load open circuit, the corresponding open circuit alarm signal of microcontroller (MCU) output arrive alarm control I/O port.
Output terminal is connected to 2 loads, and (rated operational voltage is V
Cc, rated power is respectively P
1, P
2), promptly during n=2, if V/I＞[(V
Cc)
2/ (P
1+ P
2/ 2)] or V/I＞[(V
Cc)
2/ (P
1+ P
2/ 2)] just think to have a load open circuit at least, if V/I＞2[(V
Cc)
2/ (P
1+ P
2)] just concede defeat to carry and all open a way, the corresponding open circuit alarm signal of microcontroller (MCU) output is to alarm control I/O port.。
Output terminal is connected to 3 loads, and (rated operational voltage is V
Cc, rated power is respectively P
1, P
2, P
3), promptly during n=3, if V/I＞[(V
Cc)
2/ (P
1+ P
2+ P
3/ 2)] or V/I＞[(V
Cc)
2/ (P
1+ P
2/ 2+P
3)] or V/I＞[(V
Cc)
2/ (P
1/ 2+P
2+ P
3)] just think to have a load open circuit at least, if V/I＞2[(V
Cc)
2/ (P
1+ P
2+ P
3)] just think that all loads all open a way, the corresponding open circuit alarm signal of microcontroller (MCU) output is to alarm control I/O port.
The judgement of load driving circuits output short-circuit:
(rated operational voltage is V to have only a single load for the load driving circuits output terminal
Cc, rated power is P
1), promptly during n=1, if V/I＜[V
Cc 2/ (2P
1)] just think that short circuit has taken place in load driving circuits output, the corresponding short circuit alarm signal of microcontroller (MCU) output is to alarm control I/O port.
(rated operational voltage is V to be connected to two loads for the load driving circuits output terminal
Cc, rated power is respectively P
1, P
2), if V/I＜[V
Cc 2/ (P
1+ 2P
2)] or V/I＜[V
Cc 2/ (2P
1+ P
2)] just think to have at least a load to be short-circuited, the corresponding short circuit alarm signal of microcontroller (MCU) output is to alarm control I/O port.
Car body controller of the present utility model (BCM) load is opened, the short trouble detection system, the working voltage source voltage and the load current value of the load by while inspection vehicle body controller, high-speed computation by MCU inside, obtain the load impedance value on the output terminal that load driving circuits connects each external loading, compare with the alarming threshold resistance value of setting then, judge the open circuit or the short circuit of external circuit, export corresponding open circuit or short circuit alarm signal to alarm control I/O port according to comparative result, if be judged to be load open circuit, just send sound and light alarm, remind the user in time to check, if be judged to be short circuit, with regard to the working power of disconnecting external load immediately, and send sound and light alarm, remind the user in time to check.Because load current changes with supply voltage, so traditional passing through detects current methods judgement external loading and opens, the erroneous judgement that can cause owing to the shakiness of supply voltage during short trouble, and the resistance of (temperature-resistant) load is not with change in voltage under general state, so car body controller of the present utility model (BCM) load is opened, the short trouble detection system, adopt the variation that detects the output port pull-up resistor to judge the fault type of output port, can be more accurate, can fundamentally solve the existing problem that when supply voltage is unusual, may produce erroneous judgement of classic method.
Claims (4)
- A car body controller load open, the short trouble detection system, it is characterized in that, comprising: microcontroller, supply voltage monitoring circuit, load current detection circuit, load driving circuits, fault warning circuit;Described supply voltage monitoring circuit is used for gathering in real time the operating voltage of the load of car body controller, exports the A/D port of a real-time working voltage analog voltage signal to microcontroller;Described load current detection circuit is used to detect load current, and output one real-time load current analog voltage signal is to another A/D port of microcontroller;Described load driving circuits, the drive controlling I/O port of one termination microcontroller, the working voltage source of the load of one termination car body controller, each external loading of output termination, when the drive controlling I/O of microcontroller port not during output drive signal, the connection that the working voltage source that described load driving circuits control disconnects the load of car body controller arrives described output terminal, when the drive controlling I/O of microcontroller port output drive signal, the working voltage source that the load of car body controller is connected in described load driving circuits control arrives described output terminal;Described fault warning circuit connects the alarm control I/O port of microcontroller, carries out alarm prompt according to the open circuit or the short circuit alarm signal of the output of alarm control I/O port;The real-time load current analog voltage signal that real-time working voltage analog voltage signal that described microcontroller transmits according to described supply voltage monitoring circuit and load current detection circuit transmit carries out obtaining real-time load impedance value after the computing, microcontroller compares described real-time load impedance value with setting corresponding alarming threshold resistance value, export corresponding open circuit or short circuit alarm signal to alarm control I/O port according to comparative result.
- 2. car body controller load according to claim 1 is opened; the short trouble detection system; it is characterized in that; described load driving circuits also comprises short-circuit protection circuit; described short-circuit protection circuit connects the alarm control I/O port of microcontroller; when the drive controlling I/O of microcontroller port not during output drive signal; the connection that the working voltage source that described load driving circuits control disconnects the load of car body controller arrives described output terminal; when the drive controlling I/O of microcontroller port output drive signal and the alarm control I/O port that connects microcontroller not during the output load short-circuit signal; the working voltage source that the load of car body controller is connected in described load driving circuits control arrives described output terminal; when the alarm control I/O of microcontroller port output short-circuit alarm signal, the connection that the working voltage source that described load driving circuits control disconnects the load of car body controller arrives described output terminal.
- 3. car body controller load according to claim 1 is opened, the short trouble detection system, it is characterized in that, memory write in the described microcontroller has the rated operational voltage of external loading that described load driving circuits connects and the rated power of each external loading, microcontroller is with described real-time load impedance value, compare with the corresponding alarming threshold resistance value of setting according to the rated power of the rated operational voltage of external loading that described load driving circuits connects and each external loading, export corresponding open circuit or the short circuit alarm signal is controlled the I/O port to alarm according to comparative result.
- 4. car body controller load according to claim 1 is opened, the short trouble detection system, it is characterized in that, described supply voltage monitoring circuit, with the operating voltage of the load of car body controller, output one real-time working voltage analog voltage signal is to an A/D port of microcontroller after electric resistance partial pressure, signal condition and clamped protection; Described load current detection circuit, by current ratio sensor load current and convert voltage signal to, after signal condition and clamped protection, output one real-time load current analog voltage signal is to another A/D port of microcontroller.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200746613U CN201548643U (en) | 2009-11-05 | 2009-11-05 | Load open circuit or short circuit detecting system for vehicle controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2009200746613U CN201548643U (en) | 2009-11-05 | 2009-11-05 | Load open circuit or short circuit detecting system for vehicle controller |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201548643U true CN201548643U (en) | 2010-08-11 |
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ID=42603819
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2009200746613U Expired - Lifetime CN201548643U (en) | 2009-11-05 | 2009-11-05 | Load open circuit or short circuit detecting system for vehicle controller |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201548643U (en) |
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466769A (en) * | 2010-11-03 | 2012-05-23 | 北京普源精电科技有限公司 | Test equipment for realizing on-off test with adjustable threshold and method thereof |
| CN102721894A (en) * | 2011-03-31 | 2012-10-10 | 联创汽车电子有限公司 | Fuel metering valve drive diagnostic system |
| CN102866319A (en) * | 2012-09-27 | 2013-01-09 | 重庆华渝电气仪表总厂 | Fault diagnosis circuit based on AD convertor of single chip microcomputer |
| CN103513645A (en) * | 2013-04-28 | 2014-01-15 | 惠州市德赛西威汽车电子有限公司 | Feedback detection circuit and method of automobile body controller |
| CN104300502A (en) * | 2014-09-26 | 2015-01-21 | 哈尔滨威帝电子股份有限公司 | Intelligent vehicle-mounted power device with current direction and short-circuit protection functions |
| CN105372549A (en) * | 2015-11-13 | 2016-03-02 | 安徽江淮汽车股份有限公司 | High-voltage load short circuit detection system and method |
| CN106646077A (en) * | 2016-11-18 | 2017-05-10 | 深圳市有方科技股份有限公司 | Detection apparatus used for detecting open and short circuit of load |
| CN108362944A (en) * | 2018-03-07 | 2018-08-03 | 安徽江淮汽车集团股份有限公司 | A kind of vehicle power load performance test methods |
| CN112986713A (en) * | 2020-12-16 | 2021-06-18 | 安徽阿瑞特汽车电子科技有限公司 | Power load state monitoring device for passenger car body control module |
| CN113702707A (en) * | 2021-08-05 | 2021-11-26 | 芯海科技（深圳）股份有限公司 | Load impedance measuring circuit, system and electronic equipment |
-
2009
- 2009-11-05 CN CN2009200746613U patent/CN201548643U/en not_active Expired - Lifetime
Cited By (14)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102466769A (en) * | 2010-11-03 | 2012-05-23 | 北京普源精电科技有限公司 | Test equipment for realizing on-off test with adjustable threshold and method thereof |
| CN102721894A (en) * | 2011-03-31 | 2012-10-10 | 联创汽车电子有限公司 | Fuel metering valve drive diagnostic system |
| CN102721894B (en) * | 2011-03-31 | 2014-10-22 | 联创汽车电子有限公司 | Fuel metering valve drive diagnostic system |
| CN102866319B (en) * | 2012-09-27 | 2015-11-18 | 重庆华渝电气仪表总厂 | Based on the fault diagnosis circuit of Chip Microcomputer A/D converter |
| CN102866319A (en) * | 2012-09-27 | 2013-01-09 | 重庆华渝电气仪表总厂 | Fault diagnosis circuit based on AD convertor of single chip microcomputer |
| CN103513645A (en) * | 2013-04-28 | 2014-01-15 | 惠州市德赛西威汽车电子有限公司 | Feedback detection circuit and method of automobile body controller |
| CN104300502A (en) * | 2014-09-26 | 2015-01-21 | 哈尔滨威帝电子股份有限公司 | Intelligent vehicle-mounted power device with current direction and short-circuit protection functions |
| CN104300502B (en) * | 2014-09-26 | 2018-03-09 | 哈尔滨威帝电子股份有限公司 | A kind of belt current detection and the intelligent vehicle-carried power device of short-circuit protection function |
| CN105372549A (en) * | 2015-11-13 | 2016-03-02 | 安徽江淮汽车股份有限公司 | High-voltage load short circuit detection system and method |
| CN106646077A (en) * | 2016-11-18 | 2017-05-10 | 深圳市有方科技股份有限公司 | Detection apparatus used for detecting open and short circuit of load |
| CN108362944A (en) * | 2018-03-07 | 2018-08-03 | 安徽江淮汽车集团股份有限公司 | A kind of vehicle power load performance test methods |
| CN108362944B (en) * | 2018-03-07 | 2019-10-25 | 安徽江淮汽车集团股份有限公司 | A kind of vehicle power load performance test methods |
| CN112986713A (en) * | 2020-12-16 | 2021-06-18 | 安徽阿瑞特汽车电子科技有限公司 | Power load state monitoring device for passenger car body control module |
| CN113702707A (en) * | 2021-08-05 | 2021-11-26 | 芯海科技（深圳）股份有限公司 | Load impedance measuring circuit, system and electronic equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| EE01 | Entry into force of recordation of patent licensing contract |
Assignee: United Automobile Electronic Systems Co., Ltd. Assignor: Lianchuang Auto Electronic Co., Ltd. Contract record no.: 2012990000826 Denomination of utility model: Load open circuit or short circuit detecting system for vehicle controller Granted publication date: 20100811 License type: Exclusive License Record date: 20121112 |
|
| LICC | Enforcement, change and cancellation of record of contracts on the licence for exploitation of a patent or utility model | ||
| CX01 | Expiry of patent term |
Granted publication date: 20100811 |
|
| CX01 | Expiry of patent term |