CN103986430A - Analog signal processing circuit for hybrid electric vehicle - Google Patents
Analog signal processing circuit for hybrid electric vehicle Download PDFInfo
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- CN103986430A CN103986430A CN201410150168.0A CN201410150168A CN103986430A CN 103986430 A CN103986430 A CN 103986430A CN 201410150168 A CN201410150168 A CN 201410150168A CN 103986430 A CN103986430 A CN 103986430A
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Abstract
The invention discloses an analog signal processing circuit for a hybrid electric vehicle. The analog signal processing circuit comprises an operational amplifier; the non-inverting input end of the operational amplifier is used for being connected with a to-be-amplified input signal, the inverting input end and the output end of the operational amplifier are respectively connected with a mimic input signal reference ground, the output end of the operational amplifier is used for being connected with an amplified output signal, and the ground end and the non-inverting input end of the operational amplifier are also connected with an output signal reference ground. According to the analog signal processing circuit for the hybrid electric vehicle disclosed by the invention, the mimic input signal reference ground is used as the input signal; the input signal is processed through a subtraction circuit formed by the operational amplifier; the voltage of the output end is a difference value between the input signal and the corresponding reference ground of the input signal, and is unrelated to the ground potential of an input circuit, and therefore, signal amplification is realized, and the problem that the wave distortion of the signals is caused by the fact that dropout voltage exists between the input circuit and an input circuit reference ground is avoided; the analog signal processing circuit is especially suitable for accelerator signal processing of the hybrid electric vehicle.
Description
Technical field
The present invention relates to a kind of hybrid vehicle analog signal processing circuit.
Background technology
On new forms of energy car, engine is not directly to be controlled by accelerator pedal, and need to be by the entire car controller accelerator pedal signal of sampling, through control strategy computing, send analog signal control engine accelerator open degree, generator generation current and motor output torque by entire car controller, thereby realize car load power division.
Automotive electrical system generally adopts one wire system, and an electrode of storage battery is received on car body, is commonly called as " bonding ", and according to national Specification, the electrical system of domestic automobile all adopts minus earth.But due to the bonding dots difference of different power consumption equipments, car body impedance meeting causes the current potential of bonding dots there are differences, i.e. earth potential skew.Accelerator pedal, entire car controller, Engine ECU are due to installation site difference, and earth potential skew is difficult to avoid, and when especially high-current equipment is worked, not only affects signal transmission, even can change and damage power consumption equipment because of return flow path.
Summary of the invention
The object of this invention is to provide a kind of hybrid vehicle analog signal processing circuit, be offset the analog signal distortion causing and even damage the problem of power consumption equipment in order to solve earth potential.
In order to realize above object, the technical solution adopted in the present invention is: a kind of hybrid vehicle analog signal processing circuit, comprise an operational amplifier, the in-phase input end of described operational amplifier is for connecting input signal to be amplified, its inverting input is all connected with reference to ground with analog input signal with output, its output is for connecting output signal after amplification, the ground end of operational amplifier and in-phase input end also with output signal with reference to be connected.
The in-phase input end of described operational amplifier connects input signal to be amplified through resistance R 1.
The in-phase input end of described operational amplifier through resistance R 2 and output signal with reference to be connected.
The inverting input of described operational amplifier through resistance R 3 and input signal with reference to be connected.
The inverting input of described operational amplifier is connected with its output through resistance R 4.
This circuit also comprises a stabilized voltage power supply, and the input of described stabilized voltage power supply is for being connected with the power supply of hybrid electric vehicle, and its output is connected with the power end of operational amplifier, and its ground end is connected with reference to ground with output signal.
Between the in-phase input end of described operational amplifier and inverting input, be connected with clamp diode D2.
Between the in-phase input end of described operational amplifier and its power end and inverting input and output signal with reference to being connected with respectively clamp diode D1 and D3 between ground.
Hybrid vehicle analog signal processing circuit of the present invention using analog input signal with reference to as input signal, the subtraction circuit consisting of operational amplifier is processed this signal, output end voltage is input signal difference with reference to ground corresponding to it, irrelevant with the earth potential of input circuit, thereby realize signal amplification, avoided input circuit, output circuit with reference to exist pressure reduction to cause signal fluctuation problem of dtmf distortion DTMF, be especially applicable to hybrid electric vehicle throttle signal processing.In addition, ground corresponding to analog input signal and output circuit are relevant but directly do not connect with reference to ground, have larger impedance between the two, therefore can not produce potential return flow path, have guaranteed circuit safety.
Brief description of the drawings
Fig. 1 is the circuit diagram of analog signal processing circuit of the present invention for the treatment of analog output signal;
Fig. 2 is the circuit diagram of analog signal processing circuit of the present invention for the treatment of analog input signal.
Embodiment
Below in conjunction with accompanying drawing and specific embodiment, the present invention is described further.
Be the circuit diagram of hybrid vehicle analog signal processing circuit embodiment of the present invention as depicted in figs. 1 and 2, as seen from the figure, this circuit comprises an operational amplifier U1B, the in-phase input end of this operational amplifier is for connecting analog input signal to be amplified, its inverting input is all connected with reference to ground with input signal with output, the output of operational amplifier is the automobile-used analog output signal after amplifying, the ground end of this operational amplifier and in-phase input end also with output signal with reference to be connected.
This circuit also comprises a stabilized voltage power supply U1, and the input of stabilized voltage power supply is for being connected with the power supply VCC of hybrid electric vehicle, and its output is connected with the power end VDD of operational amplifier, and its ground end is connected with reference to ground with output signal.This stabilized voltage power supply is a low pressure difference linear voltage regulator, and its output is powered to amplifier, to improve operational amplifier power supply quality.
In the present embodiment, the in-phase input end of operational amplifier connects analog input signal to be amplified through resistance R 1, its in-phase input end through resistance R 2 and output signal with reference to be connected; The inverting input of this operational amplifier through resistance R 3 and input signal with reference to be connected; Its inverting input is connected with its output through resistance R 4.
Between the in-phase input end of operational amplifier and inverting input, be connected with clamp diode D2; Between its in-phase input end and power supply and inverting input and analog signal with reference to being connected with respectively clamp diode D1 and D3 between ground.D1, D2, D3, for clamper, play the object of protection amplifier work.
Be illustrated in figure 1 the circuit diagram of analog signal processing circuit of the present invention for the treatment of entire car controller analog output signal, according to control strategy output throttle signal control engine, DAC is the analog signal to be amplified that entire car controller sends, G_DAC is the reference ground of DAC analog signal, AOUT is the automobile-used analog output signal after amplifying, and G_AOUT is that AOUT is with reference to ground.
The operation principle of hybrid vehicle analog signal processing circuit of the present invention is as follows: analog signal processing circuit of the present invention is the resistance circuit of R1, R2, R3, R4 formation and the subtraction circuit of operational amplifier U1B composition, analog input signal DAC to be amplified and reference ground G_DAC thereof connect the input of subtraction circuit, and input signal uses as signal with reference to ground G_DAC.According to subtraction circuit principle, analog output signal AOUT equals input signal DAC and its with reference to the voltage difference between ground G_DAC, even if earth potential is offset, simulation output AOUT still can correctly follow status input signal.Due to input signal with reference to as signal, be connected with output circuit through resistance, can not form potential return flow path, earth potential skew does not affect signal processing and device security.
Be illustrated in figure 2 the circuit diagram of the present invention for the treatment of entire car controller analog input signal, can process the signal of gas pedal to entire car controller, AIN is the analog signal to be amplified from gas pedal, G_AIN is the reference ground of AIN analog signal, ADC is the automobile-used analog output signal after amplifying, for entire car controller sampling, G_ADC is that ADC is with reference to ground.Its operation principle is described above, identical with output signal processing mode, is not repeated.
Operational amplifier output terminal of the present invention can also increase extra protective circuit according to actual needs, meets the application needs of different occasions.
Above embodiment is only for helping to understand core concept of the present invention; can not limit the present invention with this; for those skilled in the art; every foundation thought of the present invention; the present invention is modified or is equal to replacement; any change of doing in specific embodiments and applications, within all should being included in protection scope of the present invention.
Claims (8)
1. a hybrid vehicle analog signal processing circuit, it is characterized in that: comprise an operational amplifier, the in-phase input end of described operational amplifier is for connecting input signal to be amplified, its inverting input is all connected with reference to ground with analog input signal with output, its output is for connecting output signal after amplification, the ground end of operational amplifier and in-phase input end also with output signal with reference to be connected.
2. hybrid vehicle analog signal processing circuit according to claim 1, is characterized in that: the in-phase input end of described operational amplifier connects input signal to be amplified through resistance R 1.
3. hybrid vehicle analog signal processing circuit according to claim 1, is characterized in that: the in-phase input end of described operational amplifier through resistance R 2 and output signal with reference to be connected.
4. hybrid vehicle analog signal processing circuit according to claim 1, is characterized in that: the inverting input of described operational amplifier through resistance R 3 and input signal with reference to be connected.
5. hybrid vehicle analog signal processing circuit according to claim 1, is characterized in that: the inverting input of described operational amplifier is connected with its output through resistance R 4.
6. hybrid vehicle analog signal processing circuit according to claim 1, it is characterized in that: this circuit also comprises a stabilized voltage power supply, the input of described stabilized voltage power supply is for being connected with the power supply of hybrid electric vehicle, its output is connected with the power end of operational amplifier, and its ground end is connected with reference to ground with output signal.
7. hybrid vehicle analog signal processing circuit according to claim 1, is characterized in that: between the in-phase input end of described operational amplifier and inverting input, be connected with clamp diode D2.
8. hybrid vehicle analog signal processing circuit according to claim 1, is characterized in that: between the in-phase input end of described operational amplifier and its power end and inverting input and output signal with reference to being connected with respectively clamp diode D1 and D3 between ground.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410150168.0A CN103986430A (en) | 2014-04-15 | 2014-04-15 | Analog signal processing circuit for hybrid electric vehicle |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410150168.0A CN103986430A (en) | 2014-04-15 | 2014-04-15 | Analog signal processing circuit for hybrid electric vehicle |
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| CN103986430A true CN103986430A (en) | 2014-08-13 |
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| CN201410150168.0A Pending CN103986430A (en) | 2014-04-15 | 2014-04-15 | Analog signal processing circuit for hybrid electric vehicle |
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6100764A (en) * | 1998-02-19 | 2000-08-08 | Samsung Electronics Co., Ltd. | Remote control preamp circuit |
| CN2441144Y (en) * | 2000-08-25 | 2001-08-01 | 山东省远大网络多媒体有限责任公司 | Relative voltage measuring device |
| CN102944744A (en) * | 2012-11-06 | 2013-02-27 | 昆山北极光电子科技有限公司 | Low-drift online impedance measurement circuit |
| JP2013104942A (en) * | 2011-11-11 | 2013-05-30 | Renesas Electronics Corp | Output circuit and amplifier having the same |
| CN103389407A (en) * | 2013-07-29 | 2013-11-13 | Tcl空调器(中山)有限公司 | Mains supply detecting device |
| CN203883776U (en) * | 2014-04-15 | 2014-10-15 | 郑州宇通客车股份有限公司 | Analog signal processing circuit for hybrid electric vehicle |
-
2014
- 2014-04-15 CN CN201410150168.0A patent/CN103986430A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US6100764A (en) * | 1998-02-19 | 2000-08-08 | Samsung Electronics Co., Ltd. | Remote control preamp circuit |
| CN2441144Y (en) * | 2000-08-25 | 2001-08-01 | 山东省远大网络多媒体有限责任公司 | Relative voltage measuring device |
| JP2013104942A (en) * | 2011-11-11 | 2013-05-30 | Renesas Electronics Corp | Output circuit and amplifier having the same |
| CN102944744A (en) * | 2012-11-06 | 2013-02-27 | 昆山北极光电子科技有限公司 | Low-drift online impedance measurement circuit |
| CN103389407A (en) * | 2013-07-29 | 2013-11-13 | Tcl空调器(中山)有限公司 | Mains supply detecting device |
| CN203883776U (en) * | 2014-04-15 | 2014-10-15 | 郑州宇通客车股份有限公司 | Analog signal processing circuit for hybrid electric vehicle |
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Application publication date: 20140813 |