CN103324096B - Sensor signal treating apparatus and vehicle-mounted type electronic-controlled installation - Google Patents
Sensor signal treating apparatus and vehicle-mounted type electronic-controlled installation Download PDFInfo
- Publication number
- CN103324096B CN103324096B CN201210101413.XA CN201210101413A CN103324096B CN 103324096 B CN103324096 B CN 103324096B CN 201210101413 A CN201210101413 A CN 201210101413A CN 103324096 B CN103324096 B CN 103324096B
- Authority
- CN
- China
- Prior art keywords
- power supply
- signal
- setting
- path
- state
- Prior art date
- 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.)
- Active
Links
Abstract
The invention provides a kind of sensor signal treating apparatus and vehicle-mounted type electronic-controlled installation; even if it is stopping under the situation of sensor supply electric power; also can guard signal treating apparatus from the negative voltage surge inputted from signal input terminal, and can power consumption be suppressed.Sensor signal treating apparatus is connected with the 1st power supply BAT.Signal processing part is connected on the terminal that is connected with the 2nd power supply VC, when the state that the 2nd power supply VC connects, and corresponds to sensor and exports and processed by the signal that terminal inputs.Voltage limiting circuit is connected with terminal, and utilizes the 1st power supply BAT the current potential of the signal on terminal to be limited in the current potential being more than or equal to regulation.The potential setting of regulation is the 1st setting when the 2nd power supply VC is on-state by commutation circuit, and is the 2nd setting by the potential setting of regulation when the 2nd power supply VC is off state, and the 2nd setting is more than or equal to 0V, and lower than the 1st setting.
Description
Technical field
The present invention relates to a kind of device that the signal of sensor-based output is processed and vehicle-mounted type electronic-controlled installation vehicle-carrying mechanism controlled based on the output of onboard sensor.
Background technology
As an example of onboard sensor, known a kind of detonation sensor that the pinking of engine is detected.ECU as vehicle-mounted type electronic-controlled installation is configured to, and processes the signal based on the output coming from detonation sensor, and carries out the control for eliminating pinking.
In the circuit that the signal based on the output coming from detonation sensor is processed, the buffer amplifier being used for input signal being carried out to impedance transformation is set.If because buffer amplifier is transfused to the signal of the current potential had beyond specialized range, then job insecurity, so arrange the voltage limiting circuit (clamping circuit) (such as with reference to patent documentation 1) being used for being limited in by the current potential of input signal within specialized range at the leading portion of buffer amplifier.
The ECU comprising voltage limiting circuit is connected with Vehicular accumulator cell (the 1st power supply).On the other hand, input the terminal coming from the signal of detonation sensor to be connected with the power supply driven detonation sensor (the 2nd power supply).Voltage limiting circuit utilizes the 1st power supply to control voltage, becomes such as 1.5V to make the potential minimum of input signal.
Patent documentation 1: Japanese Unexamined Patent Publication 2000-9530 publication
Summary of the invention
If the ignition switch of engine disconnects, then the output that there is no need in ECU based on coming from detonation sensor controls.But, even if because ECU itself is in this condition also using the structure of Vehicular accumulator cell as power work, so need to make voltage limiting circuit work in order to inputting surge from the terminal be connected with detonation sensor.Particularly when inputting negative voltage surge, there is the worry causing due to the impact of parasitic elements etc. and produce maloperation on ECU.
That is, voltage limiting circuit is by the 1st power supply continuous firing, stops on the other hand from the 2nd power supply supply electric power along with disconnection ignition switch.Its result, compared with the voltage limiting circuit being enhanced current potential to make minimum input current potential higher than 0V, the current potential flowed to the circuit of the 2nd power supply from the input terminal of sensor signal is lower, thus can flow out dark current from input terminal to the 2nd mains side.This phenomenon cannot be ignored in view of the requirement of saving electric power more strict in recent years and restriction.
Therefore, the object of the invention is to supply a kind of technology, even if it is stopping under the situation of sensor supply electric power, also can guard signal treating apparatus from the negative voltage surge inputted from signal input terminal, and suppress power consumption.
To achieve these goals, the sensor signal treating apparatus of the 1st embodiment that the present invention relates to, it is connected with the 1st power supply, it is characterized in that, have: signal processing circuit, it is connected on the signal wire that is connected with the 2nd power supply, and exports corresponding signal with sensor when described 2nd power supply is on-state process what inputted by described signal wire; Voltage limiting circuit, it is connected with described signal wire, uses described 1st power supply that the current potential of the described signal in described signal wire is restricted to the current potential being more than or equal to regulation; And commutation circuit, the potential setting of described regulation is the 1st setting when described 2nd power supply is on-state by it, and be the 2nd setting when described 2nd power supply is off state by the potential setting of described regulation, the 2nd setting is more than or equal to 0V, and lower than described 1st setting.
According to this structure, no matter voltage limiting circuit the 2nd power supply is in the state of being switched on or switched off, all the current potential of the input signal in signal wire can be restricted to and be more than or equal to 0V.Therefore, when needing when the 2nd power supply is in off-state to make the work of sensor signal treating apparatus, the surge of the negative voltage of reason becoming maloperation by signal wire input and break down reliably can be prevented.
In addition, the potential difference (PD) between the 2nd power supply under the current potential of signal wire and off-state can be reduced as far as possible.Therefore, voltage limiting circuit continuous firing can be made in order to surge input, also can suppress the dark current amount flowed out to the 2nd mains side from signal wire simultaneously.
Described commutation circuit has the path that one end and described signal wire are electrically connected, described path comprises the resistance that is connected in parallel and at least one has the element of operating voltage, described commutation circuit is configured to, by making the electric current flowing through described path increase, thus be described 1st setting by the potential setting of described regulation.
Or, described commutation circuit has the 1st path and the 2nd path, wherein said 1st path produces the 1st potential difference (PD), described 2nd path produces 2nd potential difference (PD) less than described 1st potential difference (PD), be configured to, when described 2nd power supply is on-state, electric current flows through described 1st path, when described 2nd power supply is off state, electric current flows through described 2nd path.In this case, because do not need the circuit making electric current increase, so structure can be made simple, and realize saving work about electric power.
The structure that the one end that can form described 1st path and described 2nd path is electrically connected with described terminal respectively.Or also can form described 2nd path by walking around the structure of the part in described 1st path.In the latter case, because do not need to arrange on each circuit the element producing potential difference (PD), so the quantity irreducible minimum of element can be made and suppression component cost.
When above-mentioned 1st setting is the voltage of the work ensureing above-mentioned signal processing circuit, signal processing circuit can be made to work exactly.
In order to reach above-mentioned purpose, the vehicle-mounted type electronic-controlled installation of the 2nd embodiment that the present invention relates to, it is connected with the 1st power supply, it is characterized in that having: signal wire, and it is connected with the 2nd power supply, and inputs onboard sensor output; Signal processing circuit, it is connected with described signal wire, and pair exports corresponding signal with described onboard sensor when described 2nd power supply is on-state and process; Voltage limiting circuit, it is connected with described signal wire, uses described 1st power supply that the current potential of the described signal in described signal wire is restricted to the current potential being more than or equal to regulation; And commutation circuit, it is when described 2nd power supply is on-state, it is the 1st setting by the potential setting of described regulation, and when described 2nd power supply is off state, it is the 2nd setting by the potential setting of described regulation, 2nd setting is more than or equal to 0V, and lower than described 1st setting.
According to this structure, no matter voltage limiting circuit the 2nd power supply is in connection or off-state, all the current potential of the input signal on signal wire can be limited in and be more than or equal to 0V.Therefore, when needing when the 2nd power supply is off state to make the work of sensor signal treating apparatus, can reliably prevent from being entered as maloperation and the surge of the negative voltage of reason of breaking down by signal wire.
In addition, the potential difference (PD) between the 2nd power supply under the current potential of signal wire and off-state can be reduced as much as possible.Therefore, voltage limiting circuit continuous firing can be made in order to surge input, also can suppress the dark current amount flowed out to the 2nd mains side from signal wire simultaneously.
Such as, can be configured to, the on-off state of described 2nd power supply is corresponding with the on-off state of the ignition switch of engine, and described signal is the signal corresponding with the output of the sensor detected the pinking of engine.
Accompanying drawing explanation
Fig. 1 represents that sensor signal treating apparatus that the first embodiment of the present invention relates to is arranged on the circuit diagram of the state on vehicle-mounted type electronic-controlled installation.
Fig. 2 is the circuit diagram of the 1st example of the circuit representing the voltage limiting part be formed on the sensor signal treating apparatus of Fig. 1.
Fig. 3 is the circuit diagram of the 2nd example of the circuit representing the voltage limiting part be formed on the sensor signal treating apparatus of Fig. 1.
Fig. 4 is the circuit diagram of the 3rd example of the circuit representing the voltage limiting part be formed on the sensor signal treating apparatus of Fig. 1.
Embodiment
Below, based on accompanying drawing, the present invention is described in detail.In addition, in each accompanying drawing used in the following description, be that the size that can identify makes engineer's scale suitably change in order to make each parts.
Fig. 1 represents that sensor signal treating apparatus that the first embodiment of the present invention relates to is arranged on the circuit diagram of the state on vehicle-mounted type electronic-controlled installation.In addition, " connection " this term in the explanation using circuit diagram to carry out afterwards, unless otherwise specified, all represents electrical connection, as long as connection physically, directly connects or connection indirectly.
As the ECU100 of vehicle-mounted type electronic-controlled installation carrying out engine control etc., there is the 1st sensor splicing ear 101 and the 2nd sensor splicing ear 102.As the detonation sensor 300 of the sensor in the present invention, side of the positive electrode is connected with the 1st sensor splicing ear 101, and negative side is connected with the 2nd sensor splicing ear 102.Detonation sensor 300 has and produces to the pinking in engine the known structure detected.
ECU100 installs signal input circuit 110 and sensor signal treating apparatus 200.Sensor signal treating apparatus 200 is connected with the battery feed BAT as the 1st power supply of the present invention.Battery feed BAT is the power supply be not directly connected with Vehicular accumulator cell via ignition switch and accessory power supply switch.
Signal input circuit 110 has resistance 111, capacitor 112, resistance 113 and resistance 114.The signal input terminal 201 that 1st sensor splicing ear 101 has via the resistance 111 be connected in series and capacitor 112 and sensor signal treating apparatus 200 is connected.Resistance 113 is connected with the element drives power supply VC as the 2nd power supply of the present invention at the upstream side of resistance 111.Resistance 114 is connected with element drives power supply VC at the downstream side of capacitor 112.2nd sensor input 102 is fixed on earthing potential.
In addition, element drives power supply VC is switched on by the ignition switch of vehicle and becomes on-state, is disconnected the power supply forming the state of being off by ignition switch.
Detonation sensor 300 is arranged in the cylinder block of engine.Be switched on by the ignition switch of vehicle, element drives power supply VC also becomes on-state, and supplies electric power via signal input circuit 110 to detonation sensor 300.In addition, because the input terminal 201 of sensor signal treating apparatus 200 is also connected with element drives power supply VC via signal input circuit 110, drive electric power so also supply to sensor signal treating apparatus 200.
Detonation sensor 300 exports and pinking and make cylinder block shake corresponding signal occurs.This output inputs to the 1st sensor splicing ear 101 of a part and the 2nd sensor splicing ear 102 forming signal wire of the present invention.Further, export corresponding signal via signal input circuit 110 with sensor, the input terminal 201 to the part forming signal wire of the present invention inputs.
Sensor signal treating apparatus 200 has signal processing part 202, buffer amplifier 203 and voltage limiting part 210.
Signal processing part 202 plays the effect of the part as signal processing circuit of the present invention, carries out known process to the signal corresponding with the output of detonation sensor 300 inputted from input terminal 201.That is, signal processing part 202 carries out signal transacting when element drives power supply VC is on-state.The not shown microcomputer that the output coming from signal processing part 202 has to ECU100 sends, and uses in the known control (adjustment ignition timing etc.) for suppressing the pinking occurred.
Buffer amplifier 203 is the operational amplifiers forming known voltage follower circuit, in order to carry out input signal impedance transformation and between input terminal 201 and signal processing part 202.Buffer amplifier 203 plays the effect of the part as signal processing circuit of the present invention.
Voltage limiting part 210 is between input terminal 201 and buffer amplifier 203.Voltage limiting part 210 plays the so-called clamping circuit as the effect of voltage limiting circuit of the present invention.If because buffer amplifier 203 is transfused to the signal of the current potential had outside specialized range, then job insecurity, so voltage limiting part 210 receives the electric power supply coming from battery feed BAT, thus be restricted to the current potential making the current potential of input signal be more than or equal to regulation.
In addition, voltage limiting part 210 also plays the effect as commutation circuit of the present invention, consist of, when element drives power supply VC is on-state, be the about 1.5V as the 1st setting using afore mentioned rules potential setting, when element drives power supply VC is off state, be the 0V as the 2nd setting using afore mentioned rules potential setting.As this value of 1.5V of the 1st setting, as ensureing that the operating voltage of signal processing part 202 specifies.
With reference to the circuit diagram of Fig. 2, the work as above-mentioned voltage limiting circuit and commutation circuit of voltage limiting part 210 is described.
The voltage limiting part 210 of present embodiment has the 1st constant current source 211, the 2nd constant current source 212, transistor 213, switch 214, resistance 215 and diode D1 ~ D5.
1st constant current source 211 supplies the electric current I 1 of the degree that transistor 213 can be made to work, and one end is connected with battery feed BAT, and the other end is connected with the base terminal of transistor 213.The collector terminal of transistor 213 is connected with battery feed BAT, and emitter terminal is connected with the anode terminal of diode D5.The cathode terminal of diode D5 is connected with input terminal 201.
2nd constant current source 212 supplies the electric current I 2 larger than electric current I 1, and one end is connected with battery feed BAT, and the other end is connected with the 1st terminal 214a of switch 214.The 2nd terminal 214b to switch 214 inputs the signal of the on-off state representing element drives power supply VC.Switch 214 is configured to, if input the signal of the on-state representing element drives power supply VC to the 2nd terminal 214b, then it is switched on (the 1st terminal 214a and the 3rd terminal 214c conducting).
The path flow through from the electric current I 1 of the 1st constant current source 211 supply and switch 214 path that electric current I 2 flows through when on-state, collaborate at tie point 216 place.One end of resistance 215 and the anode terminal of diode D4 and tie point 216 are connected in parallel.
The cathode terminal of diode D4 and the anode terminal of diode D3 are connected in series.The anode terminal of the other end of resistance 215 and the cathode terminal of diode D3 and diode D2 is connected in parallel.
The cathode terminal of diode D2 and the anode terminal of diode D1 are connected in series.The cathode terminal of diode D1 is fixed on earthing potential.
When element drives power supply VC is on-state, switch 214 is on-state, flows through electric current (I1+I2) in resistance 215.The value of I2 and resistance 215 is defined as, and can utilize the electric current flowing through resistance 215 and the bias voltage guaranteeing the positive dirction of diode D3, D4.At this moment, the summation (4VF) of the current potential of the base terminal of transistor 213 and the operating voltage of diode D1 ~ D4 is roughly equal.
On the other hand, make transistor 213 for conducting state by electric current I 1, because also flow through electric current in diode D5, so the current potential of input terminal 201 is roughly equal with the value (4VF-2VF=is about 1.5V) deducted after the operating voltage of transistor 213 and the operating voltage of diode D5 from the base terminal current potential of transistor 213.
Like this, the current potential of the input signal on input terminal 201 can be restricted to when element drives power supply VC is on-state and be more than or equal to about 1.5V by voltage limiting part 210.Therefore, the current potential of the signal inputted to buffer amplifier 203 can be limited in specialized range, thus the signal processing circuit 202 of back segment is dealt with the work normally.
On the other hand, if the ignition switch of engine is disconnected, then switch 214 is in off-state.At this moment, because the electric current flowing through resistance 215 only has faint I1, so the potential difference (PD) produced at the two ends of resistance 215 is essentially zero, the bias voltage along diode D3, D4 positive dirction cannot be guaranteed.Therefore, the base terminal current potential of transistor 213 is roughly equal with the summation (2VF) of the operating voltage of diode D1, D2.
On the other hand, make transistor 213 for conducting state by electric current I 1, because also flow through electric current in diode D5, so the current potential of input terminal 201 is roughly equal with the value (2VF-2VF=0V) deducted after the operating voltage of transistor 213 and the operating voltage of diode D5 from the base terminal current potential of transistor 213.
Like this, the current potential of the input signal on input terminal 201 can be restricted to when element drives power supply VC is off state and be more than or equal to 0V by voltage limiting part 210.Therefore, when needing ECU100 is worked when element drives power supply VC is off state, can reliably prevent the surge of the negative voltage becoming maloperation reason from being inputted by input terminal 201.
In addition, because the electric current of input terminal 201 is 0V, so and potential difference (PD) between the element drives power supply VC under off-state in fact do not exist.Therefore, can prevent from flowing out dark current via signal input circuit 110 to element drives power supply VC side from input terminal 201.Therefore, voltage limiting part 210 continuous firing can be made in order to surge input, and power consumption can be suppressed as much as possible.
The voltage limiting part 210 of present embodiment, there is the path that one end and input terminal 201 are electrically connected, this path is configured to, containing the resistance 215 be connected in parallel and diode D3, D4, and by the work of switch 214, the electric current flowing through this path is increased, thus potential setting will be limited for about 1.5V.As the action of this commutation circuit, also can be realized by circuit structure described below.
As the 2nd example, the circuit forming voltage limiting part 220 is shown in Figure 3.Circuit for the voltage limiting part 210 with pie graph 2 has structural detail that is identical or same function and marks identical reference marks, and the repetitive description thereof will be omitted.
Voltage limiting part 220 is only have the 1st constant current source 211 with the difference of voltage limiting part 210, the path that electric current I 1 flows through at take-off point 225 place, to the 1st path 221 and the 2nd path 222 branch.
1st path 221 is connected with the 1st terminal 214a of switch 214.3rd terminal 214c of switch 214 is connected with the anode terminal of diode D7.The cathode terminal of diode D7 and the anode terminal of diode D6 are connected in series, and the cathode terminal of diode D6 and the anode terminal of diode D4 are connected in series, and the cathode terminal of diode D4 and the anode terminal of diode D3 are connected in series.The cathode terminal of diode D3 is fixed to earthing potential.
2nd path 222 is connected with the 1st terminal 223a of switch 223.The 2nd terminal 223b to switch 223 after logic inversion is inputted by not gate 224 by the signal being configured to the on-off state representing element driving power VC.That is, when switch 214 is on-state, switch 223 is off state, and when switch 214 is off state, switch 223 is on-state (the 1st terminal 223a and the 3rd terminal 223c conducting).
3rd terminal 223c of switch 223 is connected with the anode terminal of diode D2.The cathode terminal of diode D2 and the anode terminal of diode D1 are connected in series, and the cathode terminal of diode D1 is fixed as earthing potential.
When element drives power supply VC is on-state, switch 214 is on-state, and switch 223 is off state, in the 1st path 221, flow through electric current I 1.At this moment, the current potential of the base terminal of transistor 213 and the operating voltage summation (4VF) of diode D3, D4, D6, D7 roughly equal.
On the other hand, make transistor 213 for conducting state by electric current I 1, because also flow through electric current in diode D5, so the current potential of input terminal 201 is roughly equal with the value (4VF-2VF=is about 1.5V) deducted after the operating voltage of transistor 213 and the operating voltage of diode D5 from the base terminal current potential of transistor 213.Like this, the current potential of the input signal in input terminal 201 when element drives power supply VC is on-state, can be restricted to and be more than or equal to about 1.5V by voltage limiting part 220.
On the other hand, if the ignition switch of engine disconnects, then switch 214 is off state, and switch 223 is on-state, flows through electric current I 1 in path 222.At this moment, the summation (2VF) of the current potential of the base terminal of transistor 213 and the operating voltage of diode D1, D2 is roughly equal.
On the other hand, make transistor 213 for conducting state by electric current I 1, because also flow through electric current in diode D5, so the current potential of input terminal 201 is roughly equal with the value (2VF-2VF=0V) deducted after the operating voltage of transistor 213 and the operating voltage of diode D5 from the base terminal current potential of transistor 213.Like this, the current potential of the input signal on input terminal 201 can be restricted to when element drives power supply VC is off state and be more than or equal to 0V by voltage limiting part 220.
Namely, voltage limiting part 220 has the 1st path 221 and the 2nd path 222, wherein the 1st path 221 produces the 1st potential difference (PD) (4VF), 2nd path 222 produces 2nd potential difference (PD) (2VF) less than the 1st potential difference (PD), consist of, when element drives power supply VC is on-state, electric current flows through in the 1st path 221, when element drives power supply VC is off state, electric current flows through in the 2nd path 222.The one end in the 1st path 221 and the 2nd path 222 is electrically connected with input terminal 201 respectively.
According to the circuit structure of this example, because constant current source quantity can be made to be 1, the electric power of sensor signal processing circuit 200 further can be saved.
Below, as the 3rd example, the circuit of formation voltage limiting part 230 shown in Figure 4.The structural detail that circuit for the voltage limiting part 210 with pie graph 2 has identical or equal function marks identical reference marks, and the repetitive description thereof will be omitted.
Voltage limiting part 230 is only have the 1st constant current source 211 with the difference of voltage limiting part 210, forms the part walking around the diode D1 ~ D4 be connected in series and the path 233 that electric current flows through.
Voltage limiting part 230 has transistor 231.The collector terminal of transistor 231 is connected between the cathode terminal of diode D3 and the anode terminal of diode D2.The emitter terminal of transistor 231 is fixed as earthing potential.That is, formation comprises transistor 231 and walks around the path 233 of diode D1, D2.
Be configured to, represent the signal of the on-off state of element driving power VC by not gate 232 by after logic inversion, the base terminal to transistor 231 inputs.Therefore, when element drives power supply VC is on-state, transistor 231 is made to be off state by not gate 232.
At this moment, in circuitous path 233, do not flow through electric current, electric current I 1 flows through in the path that diode D1, D2 are connected in series.Therefore, the summation (4VF) of the current potential of the base terminal of transistor 213 and the operating voltage of diode D1 ~ D4 is roughly equal.
On the other hand, make transistor 213 for conducting state by electric current I 1, because also flow through electric current in diode D5, so the current potential of input terminal 201 is roughly equal with the value (4VF-2VF=is about 1.5V) deducted after the operating voltage of transistor 213 and the operating voltage of diode D5 from the base terminal current potential of transistor 213.Like this, the current potential of the input signal on input terminal 201 can be restricted to when element drives power supply VC is on-state and be more than or equal to about 1.5V by voltage limiting part 230.
On the other hand, if the ignition switch of engine is disconnected, then makes transistor 231 for conducting state by not gate 232, in circuitous path 233, flow through electric current.Therefore, the current potential of the base terminal of transistor 213 is roughly equal with the summation (2VF) of the operating voltage of diode D1, D2.
On the other hand, make transistor 213 for conducting state by electric current I 1, because also flow through electric current in diode D5, so the current potential of input terminal 201 is roughly equal with the value (2VF-2VF=0V) deducted after the operating voltage of transistor 213 and the operating voltage of diode D5 from the base terminal current potential of transistor 213.Like this, the current potential of the input signal on input terminal 201 can be restricted to when element drives power supply VC is on-state and be more than or equal to 0V by voltage limiting part 230.
Namely, voltage limiting part 230 has the 1st path and the 2nd path, wherein the 1st path produces the 1st potential difference (PD) (4VF), 2nd path produces 2nd potential difference (PD) (2VF) less than the potential difference (PD) in the 1st path, consist of, when element drives power supply VC is on-state, electric current flows through in the 1st path, and when element drives power supply VC is off state, electric current flows through in the 2nd path.2nd path as walk around the 1st path a part path 233 and formed.
According to the circuit structure of this example, constant current source can be made to be 1, and make the quantity of diode be irreducible minimum on this basis.Therefore, device volume can be made to reduce, and suppression component cost.
Above-mentioned embodiment be conveniently understand of the present invention, be not limit the present invention.The present invention can make various change improvement in the scope not departing from main points, comprises its equivalent clearly in the present invention simultaneously.
As commutation circuit voltage limiting part 210 (220,230) set by the 1st setting, namely, at element drives power supply VC be on-state situation lower terminal 201 on the restriction current potential of input signal, be not limited to the 1.5V of the guarantee of work voltage as signal processing part 202.Suitable value can be set as according to the requirement of sensor signal treating apparatus 200 or ECU100.
According to the 1st set setting, the quantity of the diode be connected in parallel with resistance 215 in voltage limiting part 210 is defined as the suitable quantity being more than or equal to 1.When the quantity of diode is n, the 1st setting is roughly equal with nVF.
Similarly, in voltage limiting part 220, be included in the quantity of the diode in the 1st path 221, be also defined as according to the 1st set setting the suitable value being more than or equal to 3.When the quantity of diode is n, the 1st setting is roughly equal with (n-2) VF.
Similarly, the quantity of the diode do not walked around by path 233 in voltage limiting part 230, is also defined as according to the 1st set setting the right quantity being more than or equal to 1.When the quantity of diode is n, the 1st setting is roughly equal with nVF.
In addition, in order to produce the potential difference (PD) realized as commutation circuit function, as long as have the element of operating voltage, it also can be the structure using transistor etc. to replace diode.
As commutation circuit voltage limiting part 210 (220,230) set by the 2nd setting, that is, when element drives power supply VC is in off-state, the restriction current potential not necessarily 0V of the input signal on terminal 201.Also can input the value of countermeasure and permissible dark current in view of surge, suitably be set as the value large and less than the 1st setting than 0V.
Voltage limiting part 210 (220,230), as long as connect with the terminal 201 as the signal wire be connected with element drives power supply VC, also can be the structure being arranged on sensor signal treating apparatus 200 outside.
Export the sensor of the signal inputted to sensor signal treating apparatus 200, not necessarily detonation sensor.Can to following suitable onboard sensor application the present invention, that is, also need when element drive voltage VC is off state to use battery feed BAT to carry out voltage restriction to input signal.
Sensor signal treating apparatus 200 is not necessarily arranged in the ECU100 as vehicle-mounted type electronic-controlled installation.The present invention can be suitable for following suitable sensor signal treating apparatus, that is, also need when the power supply of driving sensor is off state to use other power supply to carry out voltage restriction to input signal.
Claims (8)
1. a sensor signal treating apparatus, it is connected with the 1st power supply,
It is characterized in that having:
Signal processing circuit, it is connected on the signal wire that is connected with the 2nd power supply, and exports corresponding signal with sensor when described 2nd power supply is on-state process what inputted by described signal wire;
Voltage limiting circuit, it is connected with described signal wire, uses described 1st power supply that the current potential of the described signal in described signal wire is restricted to the current potential being more than or equal to regulation; And
Commutation circuit, the potential setting of described regulation is the 1st setting when described 2nd power supply is on-state by it, and be the 2nd setting when described 2nd power supply is off state by the potential setting of described regulation, the 2nd setting is more than or equal to 0V, and lower than described 1st setting.
2. sensor signal treating apparatus according to claim 1, is characterized in that,
Described commutation circuit has the path that one end and described signal wire are electrically connected,
Described path comprises the resistance that is connected in parallel and at least one has the element of operating voltage,
Described commutation circuit is configured to, and by making the electric current flowing through described path increase, thus is described 1st setting by the potential setting of described regulation.
3. sensor signal treating apparatus according to claim 1, is characterized in that,
Described commutation circuit has the 1st path and the 2nd path, and wherein said 1st path produces the 1st potential difference (PD), and described 2nd path produces 2nd potential difference (PD) less than described 1st potential difference (PD),
Be configured to, when described 2nd power supply is on-state, electric current flows through described 1st path, and when described 2nd power supply is off state, electric current flows through described 2nd path.
4. sensor signal treating apparatus according to claim 3, is characterized in that,
The one end in described 1st path and described 2nd path is electrically connected with described signal wire respectively.
5. sensor signal treating apparatus according to claim 3, is characterized in that,
On described 1st path, be connected in series with multiple elements that potential difference (PD) is produced, described 2nd path as walk around the described multiple element forming described 1st path a part path and formed.
6. the sensor signal treating apparatus according to any one in claim 1 to 5, is characterized in that,
Described 1st setting is the guarantee of work voltage of described signal processing circuit.
7. a vehicle-mounted type electronic-controlled installation, it is connected with the 1st power supply,
It is characterized in that having:
Signal wire, it is connected with the 2nd power supply, and is transfused to the output of onboard sensor;
Signal processing circuit, it is connected with described signal wire, and pair exports corresponding signal with described onboard sensor when described 2nd power supply is on-state and process;
Voltage limiting circuit, it is connected with described signal wire, uses described 1st power supply that the current potential of the described signal in described signal wire is restricted to the current potential being more than or equal to regulation; And
Commutation circuit, the potential setting of described regulation is the 1st setting when described 2nd power supply is on-state by it, and when described 2nd power supply is off state, be the 2nd setting by the potential setting of described regulation, the 2nd setting is more than or equal to 0V, and lower than described 1st setting.
8. electronic-controlled installation according to claim 7, is characterized in that,
The on-off state of described 2nd power supply is corresponding with the on-off state of the ignition switch of engine,
Described signal is the signal corresponding with the output of the sensor detected the pinking of engine.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2012065702A JP5875426B2 (en) | 2012-03-22 | 2012-03-22 | Sensor signal processing device and in-vehicle electronic control device |
| JP2012-065702 | 2012-03-22 |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN103324096A CN103324096A (en) | 2013-09-25 |
| CN103324096B true CN103324096B (en) | 2016-04-20 |
Family
ID=47541880
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201210101413.XA Active CN103324096B (en) | 2012-03-22 | 2012-03-31 | Sensor signal treating apparatus and vehicle-mounted type electronic-controlled installation |
| CN 201220133322 Withdrawn - After Issue CN202686222U (en) | 2012-03-22 | 2012-03-31 | Signal processing device of sensor and vehicle-mounted electronic control device |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220133322 Withdrawn - After Issue CN202686222U (en) | 2012-03-22 | 2012-03-31 | Signal processing device of sensor and vehicle-mounted electronic control device |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP5875426B2 (en) |
| CN (2) | CN103324096B (en) |
Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5875426B2 (en) * | 2012-03-22 | 2016-03-02 | 富士通テン株式会社 | Sensor signal processing device and in-vehicle electronic control device |
| US9748945B2 (en) * | 2014-10-28 | 2017-08-29 | Infineon Technologies Ag | Communicating with power switching devices |
| KR102458394B1 (en) * | 2018-02-28 | 2022-10-24 | 미쓰비시덴키 가부시키가이샤 | electronic component device |
Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5828141A (en) * | 1996-07-02 | 1998-10-27 | Siemens Aktiengesellschaft | Apparatus for switching an inductive load |
| JP3670669B2 (en) * | 1991-12-17 | 2005-07-13 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Control circuit device for control after control device |
| CN1711665A (en) * | 2002-11-12 | 2005-12-21 | 半导体元件工业有限责任公司 | Integrated inrush current limiter circuit and method |
| JP2007024756A (en) * | 2005-07-20 | 2007-02-01 | Auto Network Gijutsu Kenkyusho:Kk | Battery state management device |
| CN101061618A (en) * | 2005-12-09 | 2007-10-24 | 木嵨均 | Overvoltage protective device and method of overvoltage protection |
| JP2007295758A (en) * | 2006-04-26 | 2007-11-08 | Denso Corp | Surge protector |
| JP4741337B2 (en) * | 2005-10-17 | 2011-08-03 | 新電元工業株式会社 | Charger |
| CN202686222U (en) * | 2012-03-22 | 2013-01-23 | 富士通天株式会社 | Signal processing device of sensor and vehicle-mounted electronic control device |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3427598B2 (en) * | 1995-11-06 | 2003-07-22 | 株式会社デンソー | Signal processing circuit |
| JP2000009530A (en) * | 1998-06-23 | 2000-01-14 | Denso Corp | Signal processor |
| JP2003243985A (en) * | 2002-02-15 | 2003-08-29 | Denso Corp | A/d converter |
| JP4882938B2 (en) * | 2007-09-25 | 2012-02-22 | 株式会社デンソー | Power circuit |
-
2012
- 2012-03-22 JP JP2012065702A patent/JP5875426B2/en active Active
- 2012-03-31 CN CN201210101413.XA patent/CN103324096B/en active Active
- 2012-03-31 CN CN 201220133322 patent/CN202686222U/en not_active Withdrawn - After Issue
Patent Citations (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3670669B2 (en) * | 1991-12-17 | 2005-07-13 | ローベルト ボツシユ ゲゼルシヤフト ミツト ベシユレンクテル ハフツング | Control circuit device for control after control device |
| US5828141A (en) * | 1996-07-02 | 1998-10-27 | Siemens Aktiengesellschaft | Apparatus for switching an inductive load |
| CN1711665A (en) * | 2002-11-12 | 2005-12-21 | 半导体元件工业有限责任公司 | Integrated inrush current limiter circuit and method |
| JP2007024756A (en) * | 2005-07-20 | 2007-02-01 | Auto Network Gijutsu Kenkyusho:Kk | Battery state management device |
| JP4741337B2 (en) * | 2005-10-17 | 2011-08-03 | 新電元工業株式会社 | Charger |
| CN101061618A (en) * | 2005-12-09 | 2007-10-24 | 木嵨均 | Overvoltage protective device and method of overvoltage protection |
| JP2007295758A (en) * | 2006-04-26 | 2007-11-08 | Denso Corp | Surge protector |
| CN202686222U (en) * | 2012-03-22 | 2013-01-23 | 富士通天株式会社 | Signal processing device of sensor and vehicle-mounted electronic control device |
Also Published As
| Publication number | Publication date |
|---|---|
| CN202686222U (en) | 2013-01-23 |
| CN103324096A (en) | 2013-09-25 |
| JP2013198076A (en) | 2013-09-30 |
| JP5875426B2 (en) | 2016-03-02 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| EP3683592B1 (en) | Insulation detection circuit and method | |
| CN102047368B (en) | Relay controller | |
| CN102419608B (en) | Soft start circuit based on feedback voltage clamping soft start signal | |
| CN103324096B (en) | Sensor signal treating apparatus and vehicle-mounted type electronic-controlled installation | |
| CN106416071A (en) | Drive circuit for semiconductor switching element | |
| KR20140040701A (en) | Driver circuit for an electric vehicle and a diagnostic method for determining when an electrical short circuit to a ground voltage is present between a contactor coil and a voltage driver | |
| CN102781763A (en) | Electric power steering device | |
| JP2015101184A (en) | Power supply distribution device and power supply distribution system | |
| CN107972496B (en) | Pre-charging system and device for power battery of electric vehicle | |
| CN102057573B (en) | Overcurrent protective device for load circuit | |
| CN206100533U (en) | Electrified way of high pressure constant current lamp | |
| JP2009542179A (en) | Circuit arrangement and method for controlling a power consuming device | |
| CN204794010U (en) | Prevent surge circuit | |
| CN210246297U (en) | Load control output circuit with output short-circuit protection | |
| CN103677053B (en) | A kind of IC chip input voltage scope optimized circuit and optimization method | |
| CN103151923A (en) | Voltage stabilizer | |
| JP2006060971A (en) | Controller of semiconductor switch | |
| CN104850163B (en) | A kind of DC-stabilized circuit | |
| CN106500261A (en) | A kind of air conditioner electronic temperature controller | |
| CN203532297U (en) | Automobile fan speed control circuit | |
| CN203645295U (en) | Device and system for switch value output protection | |
| CN203352449U (en) | Multifunctional direct-current high-voltage power supply with intelligent numerical-control voltage stabilization | |
| CN207426781U (en) | Charging pile control module | |
| CN108432136A (en) | The control device of transistor | |
| CN106129959A (en) | A kind of power circuit and power circuit protection circuit thereof |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant |