CN207751487U - A kind of navigator brake detection circuit - Google Patents
A kind of navigator brake detection circuit Download PDFInfo
- Publication number
- CN207751487U CN207751487U CN201721927102.3U CN201721927102U CN207751487U CN 207751487 U CN207751487 U CN 207751487U CN 201721927102 U CN201721927102 U CN 201721927102U CN 207751487 U CN207751487 U CN 207751487U
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- CN
- China
- Prior art keywords
- triode
- resistance
- electrically connected
- navigator
- detection circuit
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- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
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Abstract
The utility model discloses a kind of navigator brake detection circuits, have included resistance R1, R2, R3 and R4, triode Q1, acceleration transducer and control chip U1；The collector of the triode Q1 is electrically connected with the control terminal of control chip U1；It is electrically connected with power supply ground terminal after the base series resistor R3 of triode Q1, the base stage of triode Q1 is electrically connected after being sequentially connected in series resistance R2 and R1 with acceleration transducer, and the third branch of the base stage of the triode Q1 is electrically connected after being sequentially connected in series resistance R2 and R4 with external 5V power ends；The emitter of the triode Q1 is electrically connected with power supply ground terminal.The utility model is electrically connected by triode Q1 with power supply ground terminal, to know voltage turn-on situation, the control terminal root voltage turn-on situation of control chip U1 judges that current vehicle is in braking state, it solves the defect that navigator in the prior art lacks brake detection circuit, improves the detection efficiency of control chip U1.
Description
Technical field
The utility model is related to navigator technical fields, more specifically to a kind of navigator brake detection circuit.
Background technology
Navigator is the product of the modern science and technology for positioning, navigating and entertain, and is chiefly used on automobile.It is general with automobile
And the construction with road, intercity economic interaction is more frequent, and vehicle-mounted GPS navigator seems critically important, is accurately positioned, leads
The navigation that boat, amusement function roll into one can more meet the needs of car owner, become the basic equipment on vehicle.
Navigator is internally provided with control circuit as a kind of electronic product；Control circuit is for controlling other circuits
The operation of module.Conventionally, as lacking brake detection circuit, it can not detect whether vehicle is in braking state, no
The break-make that voltage can be controlled at any time according to the actual state that vehicle is run, causes the detection efficiency of control circuit not high.
Utility model content
In view of this, the utility model provides a kind of navigator brake detection circuit, navigator in the prior art is solved
Lack the defect of brake detection circuit.
To achieve the above object, the utility model provides following technical solution：
A kind of navigator brake detection circuit, includes resistance R1, R2, R3 and R4, triode Q1, acceleration transducer
And control chip U1；The collector of the triode Q1 is electrically connected with the control terminal of control chip U1；The triode Q1's
By being grounded after resistance R3, the base stage of the triode Q1 is sequentially connected in series after resistance R2 and R1 and the acceleration transducer base stage
The base stage of electrical connection, the triode Q1 is sequentially connected in series after resistance R2 and R4 and connects power supply；The emitter of the triode Q1 with
Power supply ground terminal is electrically connected.
As the preferred embodiment of the utility model, navigator brake detection circuit further includes having capacitance C1；The capacitance
It is electrically connected with the base stage of the triode Q1 after one end series resistance R2 of C1, the other end and the power supply ground terminal electricity of the capacitance C1
Connection.
As the preferred embodiment of the utility model, navigator brake detection circuit further includes having diode D1；Described two
Be electrically connected with acceleration transducer after the anode series resistance R1 of pole pipe D1, after the cathode series resistance R2 of the diode D1 with
The base stage of the triode Q1 is electrically connected.
As the preferred embodiment of the utility model, the resistance value of resistance R2 is equal to the resistance value of the resistance R4.
As the preferred embodiment of the utility model, the resistance value of resistance R2 is 10K.
As the preferred embodiment of the utility model, the resistance value of resistance R1 is 1K.
As the preferred embodiment of the utility model, the resistance value of resistance R3 is 4.7K.
It can be seen from the above technical scheme that in the present invention, the collector due to the triode Q1 and control
The control terminal of coremaking piece U1 is electrically connected；It is electrically connected with power supply ground terminal after the first branch series resistance R3 of the base stage of the triode Q1
It connects, the second branch of the base stage of the triode Q1 is electrically connected after being sequentially connected in series resistance R2 and R1 with acceleration transducer, described
The third branch of the base stage of triode Q1 is electrically connected after being sequentially connected in series resistance R2 and R4 with external 5V power ends；The triode Q1
Emitter be electrically connected with power supply ground terminal；Therefore, in the utility model embodiment, when vehicle is in the state of brake, add
Velocity sensor detects that signal, the signal of detection are applied to electric conduction of the voltage higher than triode Q1 of the base stage of triode Q1
When pressure, triode Q1 conductings, the control terminal for then controlling chip U1 will be electrically connected by triode Q1 with power supply ground terminal, to
Know that voltage turn-on situation, the control terminal root voltage turn-on situation of control chip U1 judge that current vehicle is in braking state,
It solves the defect that navigator in the prior art lacks brake detection circuit, improves the detection efficiency of control chip U1.
Description of the drawings
Fig. 1 is the circuit diagram of the utility model.
Specific implementation mode
For the ease of the understanding of those skilled in the art, the utility model is made with reference to embodiment and attached drawing further
Explanation, the content that embodiment refers to not is restriction to the utility model.The utility model is carried out below in conjunction with attached drawing
Detailed description.
As shown in Fig. 1, a kind of navigator brakes detection circuit, include resistance R1, R2, R3 and R4, triode Q1,
Acceleration transducer and control chip U1；The collector of the triode Q1 is electrically connected with the control terminal of control chip U1；Institute
It is electrically connected with power supply ground terminal after stating the first branch series resistance R3 of the base stage of triode Q1, the of the base stage of the triode Q1
Two branches are electrically connected after being sequentially connected in series resistance R2 and R1 with acceleration transducer, the third branch of the base stage of the triode Q1 according to
It is electrically connected with external 5V power ends after secondary series resistance R2 and R4；The emitter of the triode Q1 is electrically connected with power supply ground terminal.
As the preferred embodiment of the utility model, the resistance value of resistance R2 is equal to the resistance value of the resistance R4；The resistance value of resistance R2 is
10K；The resistance value of resistance R1 is 1K；The resistance value of resistance R3 is 4.7K.In the utility model embodiment, the triode Q1
Model 3904, the control chip U1 be common embedded control chip, can according to actual conditions select different model
Electronic component and control chip, the design parameter of electronic component disclosed in the utility model can according to actual needs into
Row is replaced, and specific numerical value, the only preferred embodiment as best preferred embodiment are not limited to.It can from above-mentioned technical solution
To find out, in the present invention, since the collector of the triode Q1 is electrically connected with the control terminal of control chip U1；It is described
It is electrically connected with power supply ground terminal after the first branch series resistance R3 of the base stage of triode Q1, the second of the base stage of the triode Q1
Branch is electrically connected after being sequentially connected in series resistance R2 and R1 with acceleration transducer, and the third branch of the base stage of the triode Q1 is successively
It is electrically connected with external 5V power ends after series resistance R2 and R4；The emitter of the triode Q1 is electrically connected with power supply ground terminal；Cause
This, in the utility model embodiment, when vehicle is in the state of brake, acceleration transducer detects signal, detection
When the voltage that signal is applied to the base stage of triode Q1 is higher than the conducting voltage of triode Q1, then triode Q1 conductings control
The control terminal of chip U1 will be electrically connected by triode Q1 with power supply ground terminal, to know voltage turn-on situation, control chip
The control terminal root voltage turn-on situation of U1 judges that current vehicle is in braking state, solves navigator in the prior art and lacks
The defect for detection circuit of braking improves the detection efficiency of control chip U1.
Specifically, as the preferred embodiment of the utility model, navigator brake detection circuit further includes having capacitance C1；Institute
It is electrically connected with the base stage of the triode Q1 after stating one end series resistance R2 of capacitance C1, the other end and power supply of the capacitance C1
Ground terminal is electrically connected；The capacity of the capacitance C1 is 0.1UF.In the utility model embodiment, when the input of acceleration transducer
When voltage fluctuates, capacitance C1 can directly run fluctuation voltage water conservancy diversion to power supply ground terminal in order to avoid influencing subsequent conditioning circuit；Therefore,
The effect of the capacitance C1 is to filter out the voltage clutter of acceleration transducer, reduces voltage fluctuation, stablize input voltage, prevent
Voltage prevents triode Q1 from out-of-control phenomenon occurs because of the judgement of influence of fluctuations triode Q1, improves control acceleration transducer
Voltage control efficiency facilitates the input voltage that control chip U1 is accurately judged to acceleration transducer whether to reach circuit work institute
Voltage value is needed, to improve the detection efficiency of control chip U1.
More specifically, the preferred embodiment as the utility model, navigator brake detection circuit further includes having diode
D1；It is electrically connected with acceleration transducer after the anode series resistance R1 of the diode D1, the cathode series connection of the diode D1
It is electrically connected with the base stage of the triode Q1 after resistance R2.In the utility model embodiment, when control chip U1 or triode
Q1 break down and generate voltage reflux when, diode D1 can anti-non-return string electric current water conservancy diversion to acceleration transducer, influence to accelerate
The voltage stability of sensor is spent, while also can be prevented from triode Q1 and out-of-control phenomenon occurs, improves control acceleration sensing
The voltage control efficiency of device facilitates the input voltage that control chip U1 is accurately judged to acceleration transducer whether to reach circuit work
Voltage value needed for making, to improve the detection efficiency of control chip U1.
The course of work of the utility model is：Since acceleration transducer no-voltage inputs at the beginning, and outside 5V power supplys
The voltage at end flows to power supply ground terminal after resistance R2, R3 and R4 partial pressure and constitutes circuit, at this time the base voltage of triode Q1 compared with
It is small, the startup voltage of triode Q1 is cannot be satisfied, so triode Q1 is not turned on, control chip U1 can not detect that voltage is believed
Number；When acceleration transducer has control source, resistance R1 and R4 are equivalent to parallel circuit and whole resistance value are become smaller, using
After the partial pressure of resistance R2 and R3 so that the point voltage of the base stage of triode Q1 is more than the startup voltage 0.7V of triode Q1, at this point,
Triode Q1 conducting, then controlling the control terminal of chip U1 will be electrically connected by triode Q1 with power supply ground terminal to form electricity
Road is flowed back to, chip U1 is controlled at this time and detects that triode Q1 has been connected by control terminal, to know voltage turn-on situation, control
The control terminal root voltage turn-on situation of chip U1 judges that current vehicle is in braking state, solves navigator in the prior art
The defect for lacking brake detection circuit improves the detection efficiency of control chip U1.
The above is only the utility model preferred embodiment, is not made in any form to the utility model
Limitation, although the utility model is disclosed as above with preferred embodiment, is not limited to the utility model, any to be familiar with sheet
Technical professional is not departing within the scope of technical solutions of the utility model, is made when using the technology contents of the disclosure above
A little change or the equivalent embodiment for being modified to equivalent variations, as long as being without departing from the content of the technical scheme of the utility model, foundation
The utility model technology refers to belonging to this practicality to any simple modification, equivalent change and modification made by above example
In the range of new technique scheme.
Claims (7)
- The detection circuit 1. a kind of navigator brakes, it is characterised in that：Include resistance R1, R2, R3 and R4, triode Q1, add Velocity sensor and control chip U1；The collector of the triode Q1 is electrically connected with the control terminal of control chip U1；It is described The base stage of triode Q1 by being grounded after resistance R3, the base stage of the triode Q1 be sequentially connected in series after resistance R2 and R1 with it is described plus Velocity sensor is electrically connected, and the base stage of the triode Q1 is sequentially connected in series after resistance R2 and R4 and connects power supply；The triode Q1 Emitter be electrically connected with power supply ground terminal.
- The detection circuit 2. a kind of navigator according to claim 1 brakes, it is characterised in that：Navigator brake detection electricity Road further includes having capacitance C1；One end of the capacitance C1 is set to the common end of resistance R1 and resistance R2, and the capacitance C1's is another End ground connection.
- The detection circuit 3. a kind of navigator according to claim 1 brakes, it is characterised in that：Navigator brake detection electricity Road further includes having diode D1；The anode of the diode D1 after resistance R1 with acceleration transducer by being electrically connected, and described two The cathode of pole pipe D1 after resistance R2 with the base stage of the triode Q1 by being electrically connected.
- The detection circuit 4. a kind of navigator according to any one of claim 1-3 claims brakes, it is characterised in that： The resistance value of the resistance R2 is equal to the resistance value of the resistance R4.
- The detection circuit 5. a kind of navigator according to claim 4 brakes, it is characterised in that：The resistance value of the resistance R2 is 10K。
- The detection circuit 6. a kind of navigator according to claim 1 brakes, it is characterised in that：The resistance value of the resistance R1 is 1K。
- The detection circuit 7. a kind of navigator according to claim 1 brakes, it is characterised in that：The resistance value of the resistance R3 is 4.7K。
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721927102.3U CN207751487U (en) | 2017-12-29 | 2017-12-29 | A kind of navigator brake detection circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721927102.3U CN207751487U (en) | 2017-12-29 | 2017-12-29 | A kind of navigator brake detection circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207751487U true CN207751487U (en) | 2018-08-21 |
Family
ID=63152214
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721927102.3U Expired - Fee Related CN207751487U (en) | 2017-12-29 | 2017-12-29 | A kind of navigator brake detection circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN207751487U (en) |
-
2017
- 2017-12-29 CN CN201721927102.3U patent/CN207751487U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180821 Termination date: 20201229 |
|
| CF01 | Termination of patent right due to non-payment of annual fee |