CN202952951U - Electronic steering column lock state detection circuit - Google Patents
Electronic steering column lock state detection circuit Download PDFInfo
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- CN202952951U CN202952951U CN 201220657163 CN201220657163U CN202952951U CN 202952951 U CN202952951 U CN 202952951U CN 201220657163 CN201220657163 CN 201220657163 CN 201220657163 U CN201220657163 U CN 201220657163U CN 202952951 U CN202952951 U CN 202952951U
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- steering column
- electronic steering
- state
- column lock
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Abstract
The utility model discloses an electronic steering column lock state detection circuit. The bus communication feedback and the hardware independence feedback can be achieved through a communication interface of a microcontroller module and a hardware interface of a hardware unit, even under a failure mode of a microcontrol module of an electronic steering column lock, the independent hardware unit can also accurately feed back unlocking or locking state of the electronic steering column lock, and the locking state of the electronic steering column lock can be accurately and reliably fed back, so that the safety of the electronic steering column lock can be improved.
Description
Technical field
The utility model relates to the automobile burglar technology, particularly a kind of electronic steering column lock state detection circuit.
Background technology
Electronic steering column lock is a safety member in automotive theft proof system, in the electronic steering column locking system, according to the authorized user, whether by checking, electronic steering column lock drives by the forward or reverse of motor, and lock locking steering shaft or release discharge steering shaft.The modern automobile industry has proposed more and more higher requirement for the compactedness of the reliability of electronic steering column locking system, safety, installing space.
Electronic steering column lock, as a safety member, does not allow accident to lock in the Vehicle Driving Cycle process; Lock if meet accident and not effectively prompting, the personal safety accident just probably occurs.Therefore how to feed back accurately in real time the electronic steering column lock status in Vehicle Driving Cycle just most important.
Common electronic steering column lock state detection circuit, as shown in Figure 1, comprise a micro controller module 2, a micro-switch 3, and an end of described micro-switch 3 is for connecing a state input end 22 of micro controller module 2, and the other end is for connecing a direct current voltage or ground; When electronic steering column lock is in the unlocked position, mechanical mechanism can touch micro-switch 3 makes a state input end 22 that connects micro controller module 2 connect with vdc, and making this state input end is high level; When electronic steering column lock, during in upper lock position, mechanical mechanism can touch micro-switch 3 connects together a state input end 22 that connects micro controller module 2, and making this state input end is low level; When this state input end is high level, (bus) communication interface 21 of passing through of micro controller module 2 is passed to the car load network to the electronic steering column lock released state, when this state input end is low level, (bus) interface 1 that passes through of micro controller module 2 is passed to the car load network to the electronic steering column lock locking state.
Common electronic steering column lock state detection circuit, when micro controller module 2 breaks down, can't feed back the electronic steering column lock status accurately, and reliability is lower.
The utility model content
The technical problems to be solved in the utility model is to provide a kind of electronic steering column lock state detection circuit, can feed back accurately, reliably the electronic steering column lock status.
For solving the problems of the technologies described above, the electronic steering column lock state detection circuit that the utility model provides, its micro controller module, micro-switch, NPN aerotron, PNP aerotron, the first diode, the second diode, the first resistance, the second resistance;
Described micro-switch, an end is for connecing the first state input end or the second state input end of micro controller module, and the other end is for ground connection;
Along with the release of electronic steering column lock, upper lock position conversion, an end of described micro-switch is being connected the first state input end and is being disconnected the second state input end, connect the second state input end and disconnect between the first state input end and changing;
Described NPN aerotron, base stage connects the second state input end of described micro controller module, and collecting electrode connects the base stage of described PNP aerotron, grounded emitter;
Described PNP aerotron, emitter connects the first vdc, and collecting electrode is as the second electronic steering column lock released state mouth;
Described the first diode, the second resistance are serially connected between the first state input end of the second vdc with described micro controller module, and the anode of the first diode is in the second DC voltage side;
Described the second diode is connected between the first state input end of collecting electrode with described micro controller module of described NPN aerotron, and the anode of the second diode is in the collecting electrode side of NPN aerotron;
Described the first resistance, be connected between the second state input end of the first vdc with described micro controller module;
Described micro controller module, according to the level of the first state input end and the second state input end, control communication interface output release or locking state signal; The communication interface of described micro controller module, as the first electronic steering column lock released state mouth.
Preferably, the electronic steering column lock state detection circuit, also comprise the 3rd resistance, electric capacity;
Described the 3rd resistance, capacitance series are between the collecting electrode of described PNP aerotron is with ground, and the point of connection of described the 3rd resistance and electric capacity is as the second electronic steering column lock released state mouth.
Preferably, the second vdc is greater than the first vdc.
Preferably, when electronic steering column lock is in the unlocked position, logical the first state input end of one termination of described micro-switch also disconnects the second state input end, the first state input end of micro controller module is connected together, and the second state input end of micro controller module is disconnected together;
When electronic steering column lock during in upper lock position, logical the second state input end of one termination of described micro-switch also disconnects the first state input end, the second state input end of micro controller module is connected together, and the first state input end of micro controller module is disconnected together;
When the first state input end of described micro controller module is low level, and the second state input end is high level, and described micro controller module is controlled communication interface output released state signal;
When the first state input end of described micro controller module is high level, and the second state input end is low level, and described micro controller module is controlled communication interface output locking state signal;
When the second electronic steering column lock released state mouth, during higher than setting voltage, the expression electronic steering column lock is released state; When the second electronic steering column lock released state mouth, during lower than setting voltage, the expression electronic steering column lock is locking state;
Setting voltage is lower than the first vdc.
Electronic steering column lock state detection circuit of the present utility model, by the communication interface of micro controller module and two kinds of modes of hardware interface of hardware cell, realize bus communication feedback and hardware independent feedback, even under the pattern lost efficacy at the electronic steering column lock micro controller module, independently hardware cell also can correctly feed back release or the locking state of electronic steering column lock, can feed back accurately, reliably electronic steering column lock status, the safety that has improved electronic steering column lock.
The accompanying drawing explanation
In order to be illustrated more clearly in the technical solution of the utility model, below the accompanying drawing of the required use of the utility model is briefly described, apparently, accompanying drawing in the following describes is only embodiment more of the present utility model, for those of ordinary skills, under the prerequisite of not paying creative work, can also obtain according to these accompanying drawings other accompanying drawing.
Fig. 1 is the schematic diagram of common electronic steering column lock state detection circuit;
Fig. 2 is the schematic diagram of electronic steering column lock state detection circuit of the present utility model.
The specific embodiment
Below in conjunction with accompanying drawing, the technical scheme in the utility model is carried out to clear, complete description, obviously, described embodiment is a part of embodiment of the present utility model, rather than whole embodiment.Embodiment based in the utility model, all other embodiment that those of ordinary skills obtain under the prerequisite of not making creative work, belong to the scope that the utility model is protected.
Embodiment mono-
The electronic steering column lock state detection circuit, as shown in Figure 2, comprise a micro controller module 2, a micro-switch 3, a NPN aerotron 8, a PNP aerotron 9, the first diode 6, the second diode 7, the first resistance 4, the second resistance 5;
Described micro-switch 3, one ends are for connecing the first state input end 22 or the second state input end 23 of micro controller module 2, and the other end is for ground connection;
Along with release, the upper lock position conversion of electronic steering column lock, an end of described micro-switch 3 is being connected the first state input end 22 and is disconnecting the second state input end 23, connects the second state input end 23 and disconnect 22 conversions of the first state input end;
Preferably, when electronic steering column lock is in the unlocked position, mechanical mechanism can touch micro-switch 3, make the logical first state input end 22 of a termination of micro-switch 3 and disconnect the second state input end 23, thereby the first state input end 22 of micro controller module 2 is connected together, and the second state input end 23 of micro controller module 2 is disconnected together;
When electronic steering column lock during in upper lock position, mechanical mechanism can touch micro-switch 3, make the logical second state input end 23 of a termination of micro-switch 3 and disconnect the first state input end 22, thereby the second state input end 23 of micro controller module 2 is connected together, and the first state input end 22 of micro controller module 2 is disconnected together;
The base stage of described NPN aerotron 8, connect the second state input end 23 of described micro controller module 2; The collecting electrode of NPN aerotron 8 connects the base stage of described PNP aerotron 9, the grounded emitter of NPN aerotron 8;
The emitter of described PNP aerotron 9 connects the first vdc, and the collecting electrode of described PNP aerotron 9 is as the second electronic steering column lock released state mouth;
Preferably, when the second electronic steering column lock released state mouth, during higher than setting voltage, the expression electronic steering column lock is released state; When the second electronic steering column lock released state mouth, during lower than setting voltage, the expression electronic steering column lock is locking state; Setting voltage is lower than the first vdc.
Described the first diode 6, the second resistance 5 are connected between the first state input end 22 of the second vdc with described micro controller module 2, and the anode of the first diode 6 is in the second DC voltage side;
Described the second diode 7 is connected between the first state input end 22 of collecting electrode with described micro controller module 2 of NPN aerotron 8, and the anode of the second diode 7 is in the collecting electrode side of NPN aerotron 8;
Described the first resistance 4, be connected between the second state input end 23 of the first vdc with described micro controller module 2;
Described micro controller module, according to the level of the first state input end and the second state input end, control communication interface 21 output release or locking state signals;
The communication interface 21 of described micro controller module 2, as the first electronic steering column lock released state mouth;
Preferably, when the first state input end 22 of described micro controller module 2 is low level, and the second state input end 23 is high level, and described micro controller module 2 is controlled communication interfaces 21 output released state signals;
When the first state input end 22 of described micro controller module 2 is high level, and the second state input end 23 is low level, and described micro controller module 2 is controlled communication interfaces 21 output locking state signals.
Embodiment bis-
Based on embodiment mono-, the electronic steering column lock state detection circuit, also comprise the 3rd resistance 10, electric capacity 11;
The collecting electrode that described the 3rd resistance 10, electric capacity 11 are serially connected in PNP aerotron 9 is with between ground, and the point of connection of described the 3rd resistance 10 and electric capacity 11 is as the second electronic steering column lock released state mouth.
The 3rd resistance 10 is for current limliting, and electric capacity 11 is for filtering.
Preferably, the second vdc is greater than the first vdc, and as the second vdc is 12V, the first vdc is 5V.
The electronic steering column lock state detection circuit of embodiment mono-and embodiment bis-, when electronic steering column lock is in the unlocked position, because the first state input end 22 of micro controller module 2 is connected together, the second state input end 23 disconnects together, the first state input end 22 is low level, the second state input end 23 is high level, and micro controller module 2 is controlled communication interface 21 output electronic steering column lock released state signals to the car load network; The second state input end 23 is high level, can make 8 conductings of NPN aerotron, thereby the base tension that makes PNP aerotron 9 pulls down to ground, 9 conductings of PNP aerotron, described second voltage is in the collecting electrode output of PNP aerotron 9, make the second electronic steering column lock released state mouth higher than setting voltage, the expression electronic steering column lock is released state.Electronic steering column lock is when upper lock position, because the second state input end 23 of micro controller module 2 is connected together, the first state input end 22 disconnects together, the first state input end 22 is high level, the second state input end 23 is low level, and micro controller module 2 is controlled communication interface 21 output electronic steering column lock locking state signals to the car load network; The second state input end 23 is low level, can make 8 cut-offs of NPN aerotron, thereby make the base stage of PNP aerotron 9 and emitter not exist voltage difference also to end, make the second electronic steering column lock released state mouth lower than setting voltage, the expression electronic steering column lock is locking state.The first diode 6, the second diode 7, can guarantee that the first vdc and the second vdc can power up the first state input end 22 that is pressed onto micro controller module 2, do not interact again.
Electronic steering column lock state detection circuit of the present utility model, by the communication interface of micro controller module and two kinds of modes of hardware interface of hardware cell, realize bus communication feedback and hardware independent feedback, even under the pattern lost efficacy at the electronic steering column lock micro controller module, independently hardware cell also can correctly feed back release or the locking state of electronic steering column lock, can feed back accurately, reliably electronic steering column lock status, the safety that has improved electronic steering column lock.
The foregoing is only preferred embodiment of the present utility model; not in order to limit the utility model; all within spirit of the present utility model and principle, any modification of making, be equal to replacement, improvement etc., within all should being included in the scope of the utility model protection.
Claims (5)
1. an electronic steering column lock state detection circuit, is characterized in that, comprises micro controller module, micro-switch, NPN aerotron, PNP aerotron, the first diode, the second diode, the first resistance, the second resistance;
Described micro-switch, an end is for connecing the first state input end or the second state input end of micro controller module, and the other end is for ground connection;
Along with the release of electronic steering column lock, upper lock position conversion, an end of described micro-switch is being connected the first state input end and is being disconnected the second state input end, connect the second state input end and disconnect between the first state input end and changing;
Described NPN aerotron, base stage connects the second state input end of described micro controller module, and collecting electrode connects the base stage of described PNP aerotron, grounded emitter;
Described PNP aerotron, emitter connects the first vdc, and collecting electrode is as the second electronic steering column lock released state mouth;
Described the first diode, the second resistance are serially connected between the first state input end of the second vdc with described micro controller module, and the anode of the first diode is in the second DC voltage side;
Described the second diode is connected between the first state input end of collecting electrode with described micro controller module of described NPN aerotron, and the anode of the second diode is in the collecting electrode side of NPN aerotron;
Described the first resistance, be connected between the second state input end of the first vdc with described micro controller module;
Described micro controller module, according to the level of the first state input end and the second state input end, control communication interface output release or locking state signal; The communication interface of described micro controller module, as the first electronic steering column lock released state mouth.
2. electronic steering column lock state detection circuit according to claim 1, is characterized in that,
The electronic steering column lock state detection circuit, also comprise the 3rd resistance, electric capacity;
Described the 3rd resistance, capacitance series are between the collecting electrode of described PNP aerotron is with ground, and the point of connection of described the 3rd resistance and electric capacity is as the second electronic steering column lock released state mouth.
3. electronic steering column lock state detection circuit according to claim 2, is characterized in that,
The second vdc is greater than the first vdc.
4. electronic steering column lock state detection circuit according to claim 3, is characterized in that,
The second vdc is 12V, and the first vdc is 5V.
5. according to the described electronic steering column lock state detection circuit of claim 1 to 4 any one, it is characterized in that,
When electronic steering column lock is in the unlocked position, logical the first state input end of one termination of described micro-switch also disconnects the second state input end, the first state input end of micro controller module is connected together, and the second state input end of micro controller module is disconnected together;
When electronic steering column lock during in upper lock position, logical the second state input end of one termination of described micro-switch also disconnects the first state input end, the second state input end of micro controller module is connected together, and the first state input end of micro controller module is disconnected together;
When the first state input end of described micro controller module is low level, and the second state input end is high level, and described micro controller module is controlled communication interface output released state signal;
When the first state input end of described micro controller module is high level, and the second state input end is low level, and described micro controller module is controlled communication interface output locking state signal;
When the second electronic steering column lock released state mouth, during higher than setting voltage, the expression electronic steering column lock is released state; When the second electronic steering column lock released state mouth, during lower than setting voltage, the expression electronic steering column lock is locking state;
Described setting voltage is lower than the first vdc.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220657163 CN202952951U (en) | 2012-12-03 | 2012-12-03 | Electronic steering column lock state detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220657163 CN202952951U (en) | 2012-12-03 | 2012-12-03 | Electronic steering column lock state detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN202952951U true CN202952951U (en) | 2013-05-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220657163 Expired - Lifetime CN202952951U (en) | 2012-12-03 | 2012-12-03 | Electronic steering column lock state detection circuit |
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| CN (1) | CN202952951U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873030A (en) * | 2013-12-16 | 2014-06-18 | 联合汽车电子有限公司 | Latched fault detection circuit and realizing method thereof |
-
2012
- 2012-12-03 CN CN 201220657163 patent/CN202952951U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103873030A (en) * | 2013-12-16 | 2014-06-18 | 联合汽车电子有限公司 | Latched fault detection circuit and realizing method thereof |
| CN103873030B (en) * | 2013-12-16 | 2018-04-17 | 联合汽车电子有限公司 | The fault detection circuit and its implementation that a kind of band latches |
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Legal Events
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20130529 |
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| CX01 | Expiry of patent term |