CN206703969U - A kind of electric car safe driving early warning system - Google Patents
A kind of electric car safe driving early warning system Download PDFInfo
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- CN206703969U CN206703969U CN201720529787.XU CN201720529787U CN206703969U CN 206703969 U CN206703969 U CN 206703969U CN 201720529787 U CN201720529787 U CN 201720529787U CN 206703969 U CN206703969 U CN 206703969U
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- resistance
- comparator
- signal
- early warning
- warning system
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Abstract
The utility model discloses a kind of electric car safe driving early warning system, including power module；Pressure sensor, which is used to be arranged on electric vehicle seat, detects gravitational cue；Signal amplifier is used to amplify voltage signal；The signal that first comparator is used for after receiving signal amplifier amplification；Second comparator is used for the voltage signal for being connected to acquisition electric vehicle lock with electric vehicle lock and being switched on or switched off；With signal and output control signal of the gate circuit module for receiving first comparator and the second comparator；Relay be used to receiving with the control signal of gate circuit module, and control power system of electric automobile is switched on or switched off state.Early warning system of the present utility model can make up the defects of mechanical system, and sensitivity and reliability are high, be conveniently replaceable maintenance and installation, cheap, service life length.
Description
Technical field
It the utility model is related to automobile safety protection technology field, and in particular to a kind of electric car safe driving early warning
System.
Background technology
Electric car, i.e. electric drive vehicle, also known as electricity are driven.Electric car is divided into alternating current electric vehicle and DC electric car.Generally
The electric car said is using battery as energy source, by parts such as controller, motors, converts electrical energy into mechanical energy motion,
Change the vehicle of speed with control electric current size.Electric vehicle portion in national economy is not very high.But it meets
The fixed energy-conserving and environment-protective trend of country, greatly facilitates short distance traffic, main is by the saving and protection to the energy and environment
Played an important role in national economy.
At present, the electric car safe driving early warning system of in the market, most of is to use mechanical structure formula system.Work as driving
People is sitting at seat, in the presence of external force, by structure function between each machinery, so as to turn on the dynamical system of electric car；
When driving people is not sitting at seat, by the auto-lock function of machinery, the dynamical system of electric car is cut off.This mechanical structure formula
Electric car safe driving early warning system, acted on for a long time by external force in using electric car process, cause system to use the longevity
Order short, poor reliability, cost is higher, limits the marketing dynamics of mechanical structure formula system.
Utility model content
The purpose of this utility model is to provide a kind of electric car safe driving early warning system.
For the above-mentioned purpose, a kind of electric car safe driving early warning system is provided in one embodiment of the present utility model
System, including：
Power module, for providing electric energy for early warning system；
Pressure sensor, pressure sensor include being used for port, the port with ground wire connection being connected with power module
And the port being connected with signal amplifier；Pressure sensor, which is used to be arranged on electric vehicle seat, detects gravitational cue；
Signal amplifier, for receiving the voltage signal of pressure sensor and amplifying voltage signal；
First comparator, the signal after amplifying for receiving signal amplifier；
Warning circuit, alarm signal is sent for being connected with first comparator；
Second comparator, for being connected to obtain the voltage signal that is switched on or switched off of electric vehicle lock with electric vehicle lock；
With gate circuit module, for receiving the signal of first comparator and the second comparator, and output control signal；
Relay, for receive with the control signal of gate circuit module, and control power system of electric automobile connects on-off
Open state.
Preferably, power module is constant voltage source module.
Preferably, power module includes：
Operational amplifier A R1 for voltage follow effect；
Resistance R1 and resistance R2 for the positive input generation+5V potentials in operational amplifier；
The electric capacity C1 and voltage-stabiliser tube D1 in parallel with resistance R2；
It is connected to the resistance R3 of the output end of operational amplifier；
The NPN type triode Q1 being connected between resistance R3 and the power end of pressure sensor；
The resistance R4 being connected between NPN type triode Q1 colelctor electrode and power supply.
Preferably, signal amplifier includes：
Small voltage signal for being exported to pressure sensor is amplified the operational amplifier A R2 of effect；
It is connected to operational amplifier A R2 positive input and the resistance R5 and R6 of negative input；
The resistance R7 being connected between operational amplifier A R2 negative input and output end；
It is connected to the resistance R8 of operational amplifier A R2 output end.
Preferably, first comparator includes：
For the first comparator A1 by the voltage signal after amplification compared with reference voltage signal；
For producing the resistance R9 and resistance R10 of reference voltage in first comparator A1 negative input；
The electric capacity C2 in parallel with resistance R10；
The resistance R11 being connected between first comparator A1 output end and supply voltage.
Preferably, warning circuit includes：
The PNP type triode Q2 being connected between the power end of pressure sensor and resistance R17；
It is connected on the resistance R17 of PNP type triode Q2 base stage；
It is connected to first comparator A1 output end and the diode D3 at resistance R17 both ends；
It is connected to the active buzzer U of PNP type triode Q2 colelctor electrode.
Preferably, the second comparator includes：
For the second comparator A2 by the voltage signal after amplification compared with reference voltage signal；
For producing the resistance R13 and resistance R14 of reference voltage in the second comparator A2 positive input；
The electric capacity C3 in parallel with resistance R13；
The resistance R15 being connected between the second comparator A2 negative input and supply voltage；
The electric vehicle lock S and resistance R16 being connected between the second comparator A2 negative input and ground；
The resistance R12 being connected between the second comparator A2 output end and supply voltage.
Preferably, include being connected to gate circuit module first comparator A1 output ends and the second comparator A2 output ends it
Between diode D2.
Preferably, relay includes：
It is connected to the resistance R18 of first comparator A1 output ends；
The NPN type triode Q4 being connected between resistance R18 and ground；
The mechanical relay K being connected between NPN type triode Q4 colelctor electrodes and pressure sensor power end.
In summary, the utility model has advantages below：
Early warning system of the present utility model can make up the defects of mechanical system, and sensitivity and reliability are high, are easy to more
Maintenance and installation are changed, cheap, service life length.
Brief description of the drawings
Fig. 1 is the theory diagram of the utility model one embodiment；
Fig. 2 is the circuit theory diagrams of the utility model one embodiment.
Embodiment
With reference to figure 1, the utility model provides a kind of electric car safe driving early warning system, including：
Power module, for providing electric energy for early warning system；
Pressure sensor, pressure sensor include being used for port, the port with ground wire connection being connected with power module
And the port being connected with signal amplifier；Pressure sensor, which is used to be arranged on electric vehicle seat, detects gravitational cue；
Signal amplifier, for receiving the voltage signal of pressure sensor and amplifying voltage signal；
First comparator, the signal after amplifying for receiving signal amplifier；And by the voltage signal after amplification and reference
Magnitude of voltage carry out voltage ratio compared with；
Warning circuit, alarm signal is sent for being connected with first comparator；When the output end quilt of first comparator module
When setting low, active buzzer occurs audible alarm prompting driving people and taken care；
Second comparator, for being connected to obtain the voltage signal that is switched on or switched off of electric vehicle lock with electric vehicle lock.This
The electric vehicle lock of utility model is used for the control of signal, defeated when electric vehicle lock is by being disconnected to closure or during by being closed into disconnection
Enter signal to change；Second comparator by the voltage signal of input and reference voltage level carry out voltage ratio compared with；
With gate circuit module, for receiving the signal of first comparator and the second comparator, and output control signal；And will
The signal of the two carries out logic and operation；
Relay, for receive with the control signal of gate circuit module, and control power system of electric automobile connects on-off
Open state.
For circuit principle structure of the present utility model with reference to shown in figure 2, the type selectings of each electric elements of the utility model can be with
Selected with reference to lower column signal and parameter.
The symbol and parameter of resistance include：
R4--20 Europe；R11~R12--13K； R3、R5、R6、R8、R15、R18--2K；
R1、R7、R9、R14、R16--20K；R2、R10、R13、R17--10K.
The symbol and parameter of electric capacity include：
C1~C3--0.1uF/63V。
The symbol and parameter of triode include：
Q1, Q3--MMBT3904 (NPN type triode)；Q2--MMBT3906 (PNP type triode).
The symbol and parameter of diode include：
D1--1N4743/5V6；D2~D3--1N4007.
The symbol and parameter of operational amplifier include：
AR1 ~ AR2--LM358 (dual operational amplifier).
The symbol and parameter of comparator include：
A1 ~ A2--LM339 (dual comparator).
The symbol and parameter of buzzer include：
U--TMB12A05 (active electromagnetic buzzer).
The symbol and parameter of relay include：
K--SRD-05VDC-SL-C (electromagnetic type relay).
The symbol and parameter of pressure sensor include：
J--RFP-611 (ultra-thin highly sensitive diaphragm pressure sensor).
The symbol and parameter of electric vehicle lock include：
The electric vehicle lock of S-- common electric cars.
Wherein influence of the value size of main element parameter to circuit：
1st, R1 and R2 value needs to use universal meter to carry out resistance measurement in advance, the high precision electro that choice accuracy is 1%
Resistance, it is ensured that R1 and R2 value is equal.It so can just guarantee to make accurate+5V constant pressure source.
2nd, in each module of system, the quiescent current that can ensure each module is 1mA or so, this makes it possible to
Guarantee system is generated heat small, efficiency high in use.
3rd, diode D2 direction is can so to ensure that the signal of two comparator outputs is not mutually dry from down to up
Disturb, and realize logic and operation；Diode D3 purpose is to prevent the signal of alarm module and each module by signal not phase
Mutually interference.
One of optimal enforcement example of the present utility model, power module are constant voltage source module, further, power module bag
Include：
Operational amplifier A R1 for voltage follow effect；
Resistance R1 and resistance R2 for the positive input generation+5V potentials in operational amplifier；
The electric capacity C1 and voltage-stabiliser tube D1 in parallel with resistance R2；
It is connected to the resistance R3 of the output end of operational amplifier；
The NPN type triode Q1 being connected between resistance R3 and the power end of pressure sensor；
The resistance R4 being connected between NPN type triode Q1 colelctor electrode and power supply.
One of optimal enforcement example of the present utility model, signal amplifier includes：
Small voltage signal for being exported to pressure sensor is amplified the operational amplifier A R2 of effect；
It is connected to operational amplifier A R2 positive input and the resistance R5 and R6 of negative input；
The resistance R7 being connected between operational amplifier A R2 negative input and output end；
It is connected to the resistance R8 of operational amplifier A R2 output end.
One of optimal enforcement example of the present utility model, first comparator includes：
For the first comparator A1 by the voltage signal after amplification compared with reference voltage signal；
For producing the resistance R9 and resistance R10 of reference voltage in first comparator A1 negative input；
The electric capacity C2 in parallel with resistance R10；
The resistance R11 being connected between first comparator A1 output end and supply voltage.
One of optimal enforcement example of the present utility model, warning circuit includes：
The PNP type triode Q2 being connected between the power end of pressure sensor and resistance R17；
It is connected on the resistance R17 of PNP type triode Q2 base stage；
It is connected to first comparator A1 output end and the diode D3 at resistance R17 both ends；
It is connected to the active buzzer U of PNP type triode Q2 colelctor electrode.
One of optimal enforcement example of the present utility model, the second comparator includes：
For the second comparator A2 by the voltage signal after amplification compared with reference voltage signal；
For producing the resistance R13 and resistance R14 of reference voltage in the second comparator A2 positive input；
The electric capacity C3 in parallel with resistance R13；
The resistance R15 being connected between the second comparator A2 negative input and supply voltage；
The electric vehicle lock S and resistance R16 being connected between the second comparator A2 negative input and ground；
The resistance R12 being connected between the second comparator A2 output end and supply voltage.
One of optimal enforcement example of the present utility model, with gate circuit module include be connected to first comparator A1 output ends and
Diode D2 between second comparator A2 output ends.
One of optimal enforcement example of the present utility model, relay includes：
It is connected to the resistance R18 of first comparator A1 output ends；
The NPN type triode Q4 being connected between resistance R18 and ground；
The mechanical relay K being connected between NPN type triode Q4 colelctor electrodes and pressure sensor power end.
Tthe utility model system in the specific implementation, when driving people is not sitting on the seat of electric car, pressure sensing
Device not output signal, the voltage of first comparator A1 positive input close to 0V, first comparator A1 inverting input
Reference voltage is in+5V or so, when first comparator A1 positive input voltage is less than reverse input end voltage, first comparator
A1 output end voltage is pulled low, and triode Q2 is in the conduction state, and active buzzer sends the sound.Now, no matter electric car
Lock S be in opening or closed mode, triode Q3 are in cut-off state all the time, relay no power, such electric car
Dynamical system is cut off all the time.Above-mentioned principle can solve two large problems：First, when driving people is driving electric car, if from
Hold seat and stand and cycle the dynamical system of then electric car and can be cut off at once, and send alarm and remind driving people specification to drive；
Second, electric vehicle lock S is opened and is promoted electric car by driving people's imprudence, when driving people is not intended to touch electric car rotation drive
Dynamic component, will not also start electric car, thus be avoided that the generation of accident.
When driving people is sitting on the seat of electric car, pressure sensor exports small voltage signal, small voltage
Signal carries out voltage amplification by signal amplifier, and the voltage signal that will be above+5V is input to first comparator A1 forward direction
Input, when first comparator A1 positive input voltage is more than anti-phase input terminal voltage, first comparator A1 output end
Resistance R11 is pulled up to draw high；On the other hand, when electric vehicle lock S is closed, the second comparator A2 positive input
Voltage is less than anti-phase input terminal voltage, and the second comparator A2 output end voltage is pulled low, and now supply voltage can pass through resistance
R11, the earth terminal by diode D2 to the second comparator A2, due to diode D2 clamping action, diode D2 positive pole
Current potential is clamped at 0.7V or so, and triode Q3 is in cut-off state, relay K no powers, and power system of electric automobile is in quilt
Dissengaged positions；When electric vehicle lock S is in the conduction state, the second comparator A2 positive input voltage is more than inverting input
Voltage, the second comparator A2 output end voltage are pulled up resistance R12 and drawn high, and now supply voltage can pass through resistance R11, resistance
R18 to triode Q3 emitter stage, triode Q3 is in the conduction state, and relay K is powered, and power system of electric automobile is in and led
Logical state；Above-mentioned principle understands that only when driving people is seated on the seat and electric vehicle lock S is in the conduction state, electric car moves
Force system can be just switched on.
C1, C2, C3 are compensating electric capacities, and capacity is very small, prevent the voltage jump caused by mains fluctuations, even if electric
Source voltage is fluctuated, and stable reference voltage can be also provided for system.Operational amplifier A R1 serves voltage follow effect,
The operational amplifier A R1 push-pull circuit way of output can guarantee that the current output capability of+5V precision voltage sources is strong simultaneously.
Electric car safe driving early warning system of the present utility model is all using electronic type system, because electronic component has
There is cheap, high reliability, be particularly suitable for the batch production of product, and with low cost, high reliability and use
The features such as long lifespan, it greatly compensate for the deficiency of mechanical structure formula system.In addition, it is only necessary to which the electrical system of electric car is done
Minimum improvement, it is possible to smoothly install and use the system.
The utility model uses pressure sensor and electric vehicle lock to system input signal, with the letter exported with gate logic
Number opening and closing for control relay is gone, so as to be switched on or switched off power system of electric automobile；With making, easy, cost is low
Honest and clean, the advantages that reliability is high, service life is long.
This electric car safe driving early warning system of the present utility model, circuit is simple, element is common, cost is cheap, i.e.
It can also be achieved the goal using common components, using then better during high-quality element.Manufacture easily, each component
Acquisition can commercially be facilitated.Debugging is simple, and each resistance only needs simply pairing to meet to require, is particularly suitable for batch production
Large-scale production.The system effectiveness is high, and caloric value is low, and power utilization rate is high, and reliability is high.Applied with wide market
Prospect, it can be widely used in various types of electric cars.
Although being described in detail with reference to accompanying drawing to specific embodiment of the present utility model, should not be construed as pair
The restriction of the protection domain of this patent.In the scope described by claims, those skilled in the art are without creative labor
The dynamic various modification and variation that can be made still belong to the protection domain of this patent.
Claims (9)
- A kind of 1. electric car safe driving early warning system, it is characterised in that including：Power module, for providing electric energy for early warning system；Pressure sensor, the pressure sensor include being used for port, the port with ground wire connection being connected with power module And the port being connected with signal amplifier；The pressure sensor, which is used to be arranged on electric vehicle seat, detects gravitational cue；Signal amplifier, for receiving the voltage signal of pressure sensor and amplifying voltage signal；First comparator, the signal after amplifying for receiving signal amplifier；Warning circuit, alarm signal is sent for being connected with first comparator；Second comparator, for being connected to obtain the voltage signal that is switched on or switched off of electric vehicle lock with electric vehicle lock；With gate circuit module, for receiving the signal of first comparator and the second comparator, and output control signal；Relay, for receive with the control signal of gate circuit module, and control power system of electric automobile is switched on or switched off shape State.
- 2. electric car safe driving early warning system as claimed in claim 1, it is characterised in that：The power module is constant pressure electricity Source module.
- 3. electric car safe driving early warning system as claimed in claim 1, it is characterised in that：The power module includes：Operational amplifier A R1 for voltage follow effect；Resistance R1 and resistance R2 for the positive input generation+5V potentials in operational amplifier；The electric capacity C1 and voltage-stabiliser tube D1 in parallel with resistance R2；It is connected to the resistance R3 of the output end of operational amplifier；The NPN type triode Q1 being connected between resistance R3 and the power end of pressure sensor；The resistance R4 being connected between NPN type triode Q1 colelctor electrode and power supply.
- 4. electric car safe driving early warning system as claimed in claim 1, it is characterised in that：The signal amplifier includes：Small voltage signal for being exported to pressure sensor is amplified the operational amplifier A R2 of effect；It is connected to operational amplifier A R2 positive input and the resistance R5 and R6 of negative input；The resistance R7 being connected between operational amplifier A R2 negative input and output end；It is connected to the resistance R8 of operational amplifier A R2 output end.
- 5. electric car safe driving early warning system as claimed in claim 1, it is characterised in that：The first comparator includes：For the first comparator A1 by the voltage signal after amplification compared with reference voltage signal；For producing the resistance R9 and resistance R10 of reference voltage in first comparator A1 negative input；The electric capacity C2 in parallel with resistance R10；The resistance R11 being connected between first comparator A1 output end and supply voltage.
- 6. electric car safe driving early warning system as claimed in claim 1, it is characterised in that：The warning circuit includes：The PNP type triode Q2 being connected between the power end of pressure sensor and resistance R17；It is connected on the resistance R17 of PNP type triode Q2 base stage；It is connected to first comparator A1 output end and the diode D3 at resistance R17 both ends；It is connected to the active buzzer U of PNP type triode Q2 colelctor electrode.
- 7. electric car safe driving early warning system as claimed in claim 1, it is characterised in that：Second comparator includes：For the second comparator A2 by the voltage signal after amplification compared with reference voltage signal；For producing the resistance R13 and resistance R14 of reference voltage in the second comparator A2 positive input；The electric capacity C3 in parallel with resistance R13；The resistance R15 being connected between the second comparator A2 negative input and supply voltage；The electric vehicle lock S and resistance R16 being connected between the second comparator A2 negative input and ground；The resistance R12 being connected between the second comparator A2 output end and supply voltage.
- 8. electric car safe driving early warning system as claimed in claim 1, it is characterised in that：It is described to include with gate circuit module The diode D2 being connected between first comparator A1 output ends and the second comparator A2 output ends.
- 9. electric car safe driving early warning system as claimed in claim 1, it is characterised in that：The relay includes：It is connected to the resistance R18 of first comparator A1 output ends；The NPN type triode Q4 being connected between resistance R18 and ground；The mechanical relay K being connected between NPN type triode Q4 colelctor electrodes and pressure sensor power end.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720529787.XU CN206703969U (en) | 2017-05-13 | 2017-05-13 | A kind of electric car safe driving early warning system |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720529787.XU CN206703969U (en) | 2017-05-13 | 2017-05-13 | A kind of electric car safe driving early warning system |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206703969U true CN206703969U (en) | 2017-12-05 |
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ID=60464037
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720529787.XU Expired - Fee Related CN206703969U (en) | 2017-05-13 | 2017-05-13 | A kind of electric car safe driving early warning system |
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| Country | Link |
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| CN (1) | CN206703969U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111377030A (en) * | 2018-12-28 | 2020-07-07 | 南京懂玫驱动技术有限公司 | Accidental starting control circuit of electric bicycle |
-
2017
- 2017-05-13 CN CN201720529787.XU patent/CN206703969U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111377030A (en) * | 2018-12-28 | 2020-07-07 | 南京懂玫驱动技术有限公司 | Accidental starting control circuit of electric bicycle |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20171205 Termination date: 20180513 |