CN111546999A - Double detection circuit, method and system for ignition and flameout of automobile - Google Patents
Double detection circuit, method and system for ignition and flameout of automobile Download PDFInfo
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- CN111546999A CN111546999A CN202010321690.6A CN202010321690A CN111546999A CN 111546999 A CN111546999 A CN 111546999A CN 202010321690 A CN202010321690 A CN 202010321690A CN 111546999 A CN111546999 A CN 111546999A
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- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60R—VEHICLES, VEHICLE FITTINGS, OR VEHICLE PARTS, NOT OTHERWISE PROVIDED FOR
- B60R16/00—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for
- B60R16/02—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements
- B60R16/023—Electric or fluid circuits specially adapted for vehicles and not otherwise provided for; Arrangement of elements of electric or fluid circuits specially adapted for vehicles and not otherwise provided for electric constitutive elements for transmission of signals between vehicle parts or subsystems
- B60R16/0231—Circuits relating to the driving or the functioning of the vehicle
Abstract
The application belongs to the technical field of circuit detection, and provides a double detection circuit, a method and a system for automobile ignition and flameout, wherein the circuit comprises: the device comprises a generator, an automobile storage battery, a one-way conduction pipe, a filtering energy storage module, a voltage division module, an ignition detection module and a flameout detection module of an automobile; the input end of the voltage division module is connected with the anode of the one-way conduction tube and used for balancing the voltage drop and the voltage division of the one-way conduction tube and outputting the voltage after voltage division to the detection end of the ignition detection module and the detection end of the flameout detection module; the flameout detection module is used for comparing the voltages of the detection end and the reference end and outputting a flameout detection signal to the controller; the ignition detection module is used for comparing the voltages of the detection end and the reference end and outputting an ignition detection signal to the controller. The embodiment of the application solves the problems that the detection branch is high in cost, large in occupied space and incapable of carrying out automobile flameout detection.
Description
Technical Field
The application relates to the technical field of circuit detection, in particular to a double detection circuit, a method and a system for automobile ignition and flameout.
Background
The dormancy and wake-up control of the electronic device of the automobile generally requires the automobile to input an ACC (Adaptive cruise control) signal (power supply of an auxiliary device of an automobile electric door key), but for the electronic device mounted in the automobile after the automobile to acquire the ACC signal, a wire breaking external connection or a signal switching device is usually required on the basis of the original circuit, the steps are complicated, and the cost is high. In the prior art, an independent detection branch is designed to detect the ignition action of an automobile, and the detection branch comprises a diode and an energy storage capacitor to detect the voltage of an automobile storage battery in the actual application process. However, if the energy storage capacitor is used to maintain the capacitor, it needs higher withstand voltage and larger capacitance value, but the capacitor with high withstand voltage and high capacitance value will bring larger cost and installation space, generally the cost of the ceramic capacitor exceeding more than 25V is more than 10V by one time, and the space is increased by several times by using the electrolytic capacitor, which cannot be realized on miniaturized low-cost products, resulting in high cost and occupying the design space of the printed circuit board PCB. For the holding capacitor below 22uF in the detection branch, the input end of the operational amplifier also consumes current, and if the voltage drop speed is relatively slow at the moment of ignition, the voltage holding end also drops along with the voltage holding end and is not necessarily higher than the comparison end, and the detection response of the ignition action cannot be made under the condition that the voltage difference exists in the diode; and the detection branch cannot detect the flameout action of the automobile.
Disclosure of Invention
In view of this, the embodiment of the present application provides a circuit, a method and a system for detecting ignition and flameout of an automobile, so as to solve the problems that a detection branch has high cost and large occupied space, and the flameout detection of the automobile cannot be performed.
The first aspect of the embodiment of the present application provides a double detection circuit for ignition and flameout of an automobile, including: the device comprises a generator, an automobile storage battery, a one-way conduction pipe, a filtering energy storage module, a voltage division module, an ignition detection module and a flameout detection module of an automobile; wherein the content of the first and second substances,
the generator is connected with the automobile storage battery in parallel, the anode of the automobile storage battery is connected with the first input end of the filtering energy storage module through the one-way conduction pipe, and the cathode of the automobile storage battery is connected with the second input end of the filtering energy storage module; the output end of the filtering energy storage module is connected with a load;
the input end of the voltage division module is connected with the anode of the one-way conduction tube and is used for balancing the voltage drop and the voltage division of the one-way conduction tube and outputting the voltage after voltage division to the detection end of the ignition detection module and the detection end of the flameout detection module;
the reference end of the flameout detection module is connected with a preset reference voltage, and the reference end of the ignition detection module is connected with the voltage stabilizing end of the filtering energy storage module; the flameout detection module is used for comparing the voltages of the detection end and the reference end and outputting a flameout detection signal to the controller; the ignition detection module is used for comparing the voltages of the detection end and the reference end and outputting an ignition detection signal to the controller.
In one implementation example, the voltage dividing module comprises a first resistor and a second resistor;
the first end of the first resistor is connected with the input end of the voltage division module, and the second end of the first resistor is connected with the first end of the second resistor; the first end of the second resistor is connected with the detection end of the ignition detection module and the detection end of the flameout detection module, and the second end of the second resistor is grounded.
In one implementation example, the ignition detection module includes a first comparator; the misfire detection module comprises a second comparator;
the non-inverting input end of the first comparator is connected with the detection end of the ignition detection module, the inverting input end of the first comparator is connected with the reference end of the ignition detection module, and the output end of the first comparator is connected with the controller;
the non-inverting input end of the second comparator is connected with the detection end of the flameout detection module, the inverting input end of the second comparator is connected with the reference end of the flameout detection module, and the output end of the second comparator is connected with the controller.
In one implementation example, the double detection circuit further comprises a current fuse;
the positive pole of the automobile storage battery is connected with the positive pole of the one-way conduction pipe through the current fuse, and the negative pole of the one-way conduction pipe is connected with the first input end of the filtering energy storage module.
In one implementation example, the dual detection circuit further comprises a TVS tube (Transient voltage super, Transient diode);
the positive pole of TVS pipe with the second input of filtering energy storage module is connected, the negative pole of TVS pipe with the positive pole of one-way conduction pipe is connected.
In one implementation example, the preset reference voltage is set according to performance parameters of the misfire detection module and the voltage division module.
In one implementation example, the filtering and energy storing module comprises a first capacitor bank, a first inductor, a second inductor and a second capacitor bank;
the first input end of the first capacitor bank is connected with the first input end of the filtering energy storage module, the second input end of the first capacitor bank is connected with the second input end of the filtering energy storage module, and the first output end of the first capacitor bank is connected with the voltage stabilizing end of the filtering energy storage module; a first output end of the first capacitor bank is connected with a first input end of the second capacitor bank through the first inductor, and a second output end of the first capacitor bank is connected with a second input end of the second capacitor bank through the second inductor; and the output end of the second capacitor bank is connected with the output end of the filtering energy storage module.
In one implementation example, the first capacitor bank comprises a first capacitor and a second capacitor connected in parallel; the second capacitor group comprises a third capacitor, a fourth capacitor and a fifth capacitor which are connected in parallel, and one end of the fifth capacitor is grounded.
A second aspect of the embodiments of the present application provides a method for detecting ignition and flameout of an automobile, including:
receiving an ignition detection signal sent by an ignition detection module and a flameout detection signal sent by a flameout detection module in real time;
if the ignition detection signal is turned over, outputting a detection result of automobile ignition;
and if the flameout detection signal is overturned twice, outputting the flameout detection result of the automobile.
A third aspect of the embodiments of the present application provides a dual detection system for ignition and flameout of an automobile, including: the double detection circuit and the controller for automobile ignition and flameout; the controller includes: a memory, a processor and a computer program stored in the memory and executable on the processor, the processor when executing the computer program implementing the dual detection method for ignition and misfire of a vehicle in the second aspect.
The embodiment of the application provides a pair of detection circuitry, method and system that car was igniteed and is flamed out, the input of voltage division module with the anodal of one way conduction pipe is connected, is used for balancing the pressure drop and the partial pressure of one way conduction pipe to with the voltage output after the partial pressure extremely the detection end of ignition detection module with the detection end of flameout detection module, make full use of load line has the filtering energy storage module of device to carry out voltage status to keep. The reference end of the flameout detection module is connected with a preset reference power supply, and the reference end of the ignition detection module is connected with the voltage stabilizing end of the filtering energy storage module. The flameout detection module compares the voltages of the detection end and the reference end according to different voltage states of the automobile storage battery in the starting process and after the automobile storage battery is started to output flameout detection signals to the controller, and the ignition detection module compares the voltages of the detection end and the reference end according to different voltage states of the automobile storage battery before the automobile storage battery is started and after the automobile storage battery is started to output ignition detection signals to the controller. The voltage division module, the ignition detection module and the flameout detection module are arranged on the basis of the original load self-contained device circuit to realize double detection of automobile ignition and flameout, an external circuit does not need to be additionally added, and the automobile ignition and flameout detection device is low in cost and small in occupied space.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiments or the prior art descriptions will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present application, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a dual detection circuit for ignition and flameout of an automobile according to an embodiment of the present application;
fig. 2 is a schematic circuit diagram of a dual detection circuit for ignition and flameout of an automobile according to a second embodiment of the present application;
FIG. 3 is a schematic flowchart of a method for detecting ignition and misfire of an automobile according to a third embodiment of the present application;
fig. 4 is a schematic structural diagram of a dual ignition and misfire detection system of an automobile according to a fourth embodiment of the present application.
Detailed Description
In order to make the technical solutions better understood by those skilled in the art, the technical solutions in the embodiments of the present application will be clearly described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are some embodiments of the present application, but not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present application.
The terms "comprises" and "comprising," and any variations thereof, in the description and claims of this application and the drawings described above, are intended to cover non-exclusive inclusions. For example, a process, method, or system, article, or apparatus that comprises a list of steps or elements is not limited to only those steps or elements listed, but may alternatively include other steps or elements not listed, or inherent to such process, method, article, or apparatus. Furthermore, the terms "first," "second," and "third," etc. are used to distinguish between different objects and are not used to describe a particular order.
Example one
Fig. 1 is a schematic structural diagram of a dual detection circuit for ignition and misfire of an automobile according to an embodiment of the present application. This embodiment can be applicable to the application scene of detecting the ignition and flame-out state of car, and this car ignition and flame-out double detection circuitry can include: the device comprises a generator 10 of the automobile, an automobile storage battery 20, a one-way conduction pipe 30, a filtering energy storage module 40, a voltage division module 50, an ignition detection module 60 and a flameout detection module 70.
When the automobile does not start the engine or is flamed out, the load on the automobile is supplied with power through the own storage battery of the automobile. After the automobile is ignited to start the engine, the generator on the automobile is switched to supply power to the whole automobile and the load. Therefore, the automobile has a power supply circuit composed of a generator and a battery, and the circuit is connected to a load circuit. Specifically, in the existing generator and battery connection circuit of the automobile, the generator 10 of the automobile is connected in parallel with the automobile battery 20. After a power supply circuit consisting of the generator and the storage battery is connected to a load, in order to avoid the situation that when negative voltage and negative current appear in the automobile power supply circuit due to other sudden current interference, the detection of the ignition action and the flameout action of the automobile is interfered by the ignition detection module and the flameout detection module, the anode of the automobile power supply circuit is connected with the load through the one-way conduction pipe 30. And in order to provide stable and interference-free voltage for the load, a filtering energy storage module 40 is also required to be added into a load circuit. Specifically, the positive electrode of the automobile storage battery 20 is connected with the positive electrode of the one-way conduction pipe 30, the negative electrode of the one-way conduction pipe 30 is connected with the first input end of the filtering energy storage module 40, and the negative electrode of the automobile storage battery 20 is connected with the second input end of the filtering energy storage module 40; the output end of the filtering energy storage module 40 is connected with a load 80.
Optionally, the unidirectional conducting tube 30 may be a diode, or may be other electronic components with unidirectional conducting characteristics. The one-way conduction tube 30 can be conducted when the vehicle power supply circuit normally works, and the one-way conduction tube 30 is in a reverse connection state when the vehicle power supply circuit generates negative voltage, so that negative current is effectively inhibited.
For low-cost and effective realization of dual detection of automobile ignition and flameout, the present embodiment sets the voltage dividing module 50, the ignition detecting module 60 and the flameout detecting module 70 on the basis of the circuit of the original load of the automobile to realize dual detection of automobile ignition and flameout, so as to solve the problems that the detection branch has high cost, occupies a large space and cannot perform automobile flameout detection.
Specifically, the input end of the voltage dividing module 50 is connected to the positive electrode of the unidirectional conducting tube 30, and is configured to balance the voltage drop and the voltage division of the unidirectional conducting tube 30, and output the divided voltage to the detection end of the ignition detecting module 60 and the detection end of the misfire detecting module 70; the reference end of the flameout detection module 70 is connected with a preset reference power supply, and the reference end of the ignition detection module 60 is connected with the voltage stabilizing end of the filtering energy storage module 40; the flameout detection module 70 is configured to compare voltages of the detection terminal and the reference terminal and output a flameout detection signal to the controller 90; the ignition detection module 60 is configured to compare voltages of the detection terminal and the reference terminal and output an ignition detection signal to the controller 90.
The generator consumes extremely large current at the moment of automobile ignition, so that the voltage of a positive line of a power circuit drops, and an operational amplifier input end used by a maintaining capacitor in a detection circuit in the prior art also consumes current, so that the voltage of a voltage maintaining end is not necessarily higher than a comparison end when ignition detection is carried out through a comparator, and accurate detection cannot be carried out; and after the power circuit is connected to the load through the one-way conduction tube 30, a voltage difference exists between the positive end and the negative end of the one-way conduction tube, and the voltage of the maintaining end, namely the negative end of the one-way conduction tube, is further reduced. In order to solve the problem, the dual detection circuit for ignition and flameout of the automobile provided by the embodiment is provided with the voltage division module 50 on the basis of the circuit of the original load of the automobile, and is used for offsetting the voltage difference and voltage division of the unidirectional conducting tube 30 in the circuit. Because the input end of the voltage dividing module 50 is connected with the anode of the unidirectional conduction tube 30, the voltage of the anode of the unidirectional conduction tube 30, namely the voltage of the comparison end, can be acquired through the voltage dividing module 50; and the voltage division module 50 divides the collected voltage to balance the voltage drop of the unidirectional conduction tube 30. The voltage dividing module 50 outputs the divided voltage to the detection end of the ignition detection module 60 and the detection end of the flameout detection module 70, so that the initial voltage of the reference end of the ignition detection module 60 is the same as the initial voltage of the detection end of the ignition detection module 60, and the accuracy of ignition detection is improved.
Specifically, the double detection circuit for automobile ignition and flameout is provided with a reference end of an ignition detection module 60 connected with a voltage stabilizing end of a filtering energy storage module 40 to obtain the voltage of the negative electrode end of the unidirectional conducting tube 30 after the voltage is stabilized by a capacitor; the detection end of the ignition detection module 60 is connected with the voltage output end of the voltage dividing module 50, and obtains a voltage value obtained by offsetting the voltage difference of the unidirectional conduction tube 30 by the voltage dividing module 50 and dividing the voltage. When the car ignition generator in the twinkling of an eye consumed very big electric current and leads to power supply circuit's anodal line voltage to fall, because the effect of electric capacity in the filtering energy storage module 40 of one-way conduction pipe 30 and back-end connection, can make the voltage drop of the one-way conduction pipe 30 negative pole end after the electric capacity steady voltage be slower than the voltage of the positive pole end of one-way conduction pipe 30, the electric capacity in the filtering energy storage module 40 on utilizing the original load circuit of car keeps the negative pole terminal voltage of one-way conduction pipe 30, need not additionally to carry out independent circuit design, add external capacitor, reduce cost and compression circuit occupation space. When the ignition detection module 60 is set to compare the voltages of the detection end and the reference end, if the voltage of the detection end is greater than the voltage of the reference end, an ignition detection signal is output to the controller 90, so that the detection of the automobile ignition action is realized.
Specifically, a preset reference voltage Vref is connected to a reference end of a flameout detection module 70 arranged in a double detection circuit for ignition and flameout of the automobile; the detection end of the flameout detection module 70 is connected to the voltage output end of the voltage dividing module 50, and obtains a voltage value obtained by voltage dividing the voltage of the positive end of the unidirectional conducting tube 30 by the voltage dividing module 50 to offset the voltage difference. Before the automobile is ignited to start the engine to start, the automobile storage battery 20 supplies power, and the maximum voltage of a circuit is 12.8V; when the automobile is ignited, the power is supplied by the generator 10, the automobile storage battery 20 is used as the charging filter of the whole automobile, and the normal voltage range of the circuit is 13.2V-14.8V after the engine is started. When the automobile is shut down, the circuit voltage drops below 13.2V.
According to the above-mentioned state of the circuit voltage after the vehicle is turned off, in one implementation example, the detection threshold voltage of the misfire detection module 70 may be set to 13.25V, and the preset reference voltage Vref may be set according to the detection threshold voltage value, the voltage dividing capability of the voltage dividing module 50, and the performance parameter of the misfire detection module, so that the voltage value of the detection end of the misfire detection module 70 is close to the voltage value of the reference end when the circuit voltage is stable after the vehicle is ignited and started.
When the flameout detection module 70 compares the voltages of the detection end and the reference end, if the voltage of the detection end is greater than the voltage of the reference end, a flameout detection signal is output to the controller, and if the voltage of the detection end is less than the voltage of the reference end, a flameout detection signal is output to the controller 90, so that the flameout action of the automobile is detected.
The embodiment of the application provides a pair of detection circuitry that car was igniteed and is flamed out, voltage division module's input with unidirectional conducting tube's positive pole is connected, is used for balancing unidirectional conducting tube's pressure drop and partial pressure to with the voltage output after the partial pressure extremely the detection end of ignition detection module with flameout detection module's detection end, make full use of load line carry out voltage status with the filtering energy storage module of device certainly and keep. The reference end of the flameout detection module is connected with a preset reference power supply, and the reference end of the ignition detection module is connected with the voltage stabilizing end of the filtering energy storage module. The flameout detection module compares the voltages of the detection end and the reference end according to different voltage states of the automobile storage battery in the starting process and after the automobile storage battery is started to output flameout detection signals to the controller, and the ignition detection module compares the voltages of the detection end and the reference end according to different voltage states of the automobile storage battery before the automobile storage battery is started and after the automobile storage battery is started to output ignition detection signals to the controller. The voltage division module, the ignition detection module and the flameout detection module are arranged on the basis of the original load self-contained device circuit to realize double detection of automobile ignition and flameout, an external circuit does not need to be additionally added, and the automobile ignition and flameout detection device is low in cost and small in occupied space.
Example two
Fig. 2 is a schematic circuit diagram of a dual detection circuit for ignition and misfire of an automobile according to a second embodiment of the present invention. On the basis of the first embodiment, the structure of a part of functional circuits is further optimized, and the circuit for detecting the ignition and flameout of the automobile is specifically as follows:
the double detection circuit for ignition and flameout of the automobile also comprises a current fuse F1; before the automobile storage battery 20 is connected with the unidirectional conduction pipe 30, the positive pole of the automobile storage battery 20 is connected with the positive pole of the unidirectional conduction pipe 30 through a current fuse F1, and the negative pole of the unidirectional conduction pipe 30 is connected with the first input end of the filtering energy storage module 40.
The current fuse F1 is a resettable fuse. When the circuit normally works, the current fuse F1 is in a low-resistance state, and the heat energy generated by the current flowing through the current fuse F1 on the circuit is small, so that the crystal structure of the current fuse F1 cannot be changed, and the current fuse F1 is equivalent to a lead. When a short circuit or an overload occurs to the circuit, a large current flows through the current fuse F1, and the current fuse F1 forms a high-resistance state to limit and protect the circuit.
The double detection circuit for ignition and flameout of the automobile also comprises a TVS tube D1; the positive pole of the TVS tube D1 is connected to the second input terminal of the filtering energy storage module 40, and the negative pole of the TVS tube D1 is connected to the positive pole of the unidirectional conducting tube 30. Wherein, the TVS transistor D1 is a transient voltage suppressor diode, which can make its impedance decrease suddenly at a very high speed (up to minus 12 th power second of 10) when the two ends of the TVS transistor are subjected to transient high energy impact, and absorb a large current to clamp the voltage between the two ends at a predetermined value, thereby ensuring that the circuit elements behind the circuit are not damaged by the transient high energy impact. The influence of the pulse current on the circuit can be absorbed rapidly through the TVS tube D1.
In the dual detection circuit for ignition and flameout of a vehicle, the voltage dividing module 50 includes a first resistor R1 and a second resistor R2. As shown in fig. 3, a first terminal of the first resistor R1 is connected to the input terminal of the voltage divider module 50, and a second terminal of the first resistor R1 is connected to a first terminal of the second resistor R2; a first terminal of the second resistor R2 is connected to the detection terminal of the ignition detection module 60 and the detection terminal of the misfire detection module 70, and a second terminal of the second resistor R2 is grounded.
Since the voltage dividing module 50 is used for balancing the voltage drop and the divided voltage of the unidirectional conducting tube, and outputting the divided voltage to the detection end of the ignition detection module 60 and the detection end of the flameout detection module 70. When the voltage dividing module 50 includes the first resistor R1 and the second resistor R2, the specific working process of the voltage dividing module 50 for balancing the voltage drop and the voltage division of the unidirectional conducting tube is as follows: when current flows into the unidirectional conduction tube 30, a differential pressure is generated, which is generally 0.35V-0.7V; however, when the vehicle is in an off state, the current flowing through the unidirectional conduit 30 is extremely small, and the differential pressure is generally about 0.1V. If the voltage of the positive terminal of the unidirectional conduction tube 30 is Vd1 and the voltage of the positive terminal of the unidirectional conduction tube 30 is Vd2, the collected voltage can be divided by setting the resistance values of the first resistor R1 and the second resistor R2 to be Vd2+0.1 ═ Vd1 [ R2/R1+ R2], so that the voltage difference of the unidirectional conduction tube 30 is offset. The divided voltage is output to the detection end of the ignition detection module 60 and the detection end of the flameout detection module 70 through the first end of the second resistor R2, so that the initial voltage of the reference end of the ignition detection module 60 is the same as the initial voltage of the detection end of the ignition detection module 60, and the accuracy of ignition detection is improved.
In the double detection circuit for ignition and flameout of the automobile, the ignition detection module 60 comprises a first comparator U1; misfire detection module 70 includes a second comparator U2;
specifically, in the ignition detection module 60, the non-inverting input terminal of the first comparator U1 is connected to the detection terminal of the ignition detection module 60, the inverting input terminal of the first comparator U1 is connected to the reference terminal of the ignition detection module 60, and the output terminal of the first comparator U1 is connected to the controller.
In the ignition detection process, the voltage of the non-inverting input terminal of the first comparator U1 is a voltage value obtained by offsetting the voltage difference of the unidirectional conducting tube 30 by the voltage of the positive terminal of the unidirectional conducting tube through the first resistor R1 and the second resistor R2 in the voltage dividing module 50 and dividing the voltage; the voltage of the inverting input terminal of the first comparator U1 is the voltage of the negative terminal of the unidirectional conducting tube 30 after being stabilized by the capacitor. When the automobile is not ignited, the voltage of the non-inverting input end of the first comparator U1 is greater than that of the inverting input end, and the ignition detection signal output by the output end of the first comparator U1 to the controller is logic '1'. When an automobile is ignited, the first comparator U1 is used for judging that the input voltage of a circuit falls off when the automobile is ignited, due to the action of the unidirectional conducting tube 30 and the capacitor in the filtering energy storage module 40 connected at the later stage, the voltage drop of the inverting input end of the first comparator U1 is slower than that of the non-inverting input end of the first comparator U1, the voltage of the inverting input end of the first comparator U1 is larger than that of the non-inverting input end, an ignition detection signal output from the output end of the first comparator U1 to the controller is logic '0', and the level of the ignition detection signal is inverted. When the controller detects that the level of the ignition detection signal output by the output end of the first comparator U1 is reversed, the automobile is judged to have an ignition action.
Specifically, in the misfire detection module 70, a non-inverting input terminal of a second comparator U2 is connected to the detection terminal of the misfire detection module 70, an inverting input terminal of the second comparator U2 is connected to the reference terminal of the misfire detection module 70, and an output terminal of the second comparator U2 is connected to the controller.
In the flameout detection process, the voltage of the non-inverting input terminal of the second comparator U2 is a voltage value obtained by offsetting the voltage difference of the unidirectional conducting tube 30 by the voltage of the positive terminal of the unidirectional conducting tube through the first resistor R1 and the second resistor R2 in the voltage dividing module 50 and dividing the voltage; the voltage at the inverting input of the second comparator U2 is the predetermined reference voltage Vref.
Before the automobile is ignited to start the engine to start, the automobile storage battery 20 supplies power, and the maximum voltage of a circuit is 12.8V; when the automobile is ignited, the power is supplied by the generator 10, the automobile storage battery 20 is used as the charging filter of the whole automobile, and the normal voltage range of the circuit is 13.2V-14.8V after the engine is started. When the automobile is shut down, the circuit voltage drops below 13.2V. In one embodiment, the detection threshold voltage of the misfire detection module 70 may be set to 13.25V according to the state of the circuit voltage after the vehicle is turned off, and the preset reference voltage Vref is set according to the detection threshold voltage value, the resistances of the first resistor R1 and the second resistor R2 in the voltage division module 50, and the performance parameters of the second comparator U2 in the misfire detection module. Specifically, for example, if the preset reference voltage is set to be 1.8V to 3.3V according to the voltage allowable range of the second comparator U2, the voltage value of the preset reference voltage Vref is set to satisfy Vref-13.25 ═ R2/R1+ R2. When the voltage of the positive terminal of the unidirectional conducting tube 30 is less than 13.25V, the voltage of the non-inverting input terminal of the second comparator U2 is less than the voltage Vref of the inverting input terminal of the second comparator U2.
When the automobile is not ignited, the voltage of the circuit is 12.8V at most, the voltage of the inverting input end of the second comparator U2 is larger than that of the non-inverting input end, and an ignition detection signal output from the output end of the second comparator U2 to the controller is logic '0'. When the automobile is ignited and started, the normal voltage range of the circuit is 13.2V-14.8V, the voltage of the non-inverting input end of the second comparator U2 is larger than that of the inverting input end, the ignition detection signal output by the output end of the second comparator U2 to the controller is logic '1', and the ignition detection signal is subjected to level inversion once. When the automobile is flameout, the circuit voltage drops to be lower than 13.2V, the voltage of the inverting input end of the second comparator U2 is larger than that of the non-inverting input end, the ignition detection signal output to the controller by the output end of the second comparator U2 is logic '0', and the ignition detection signal is subjected to secondary level inversion. When the controller detects that the flameout detection signal output by the output end of the second comparator U2 has two level inversions, the automobile is judged to have flameout action.
In the double detection circuit for ignition and flameout of the automobile, the filtering energy storage module 40 comprises a first capacitor bank, a first inductor, a second inductor and a second capacitor bank; the first input end of the first capacitor bank is connected with the first input end of the filtering energy storage module, the second input end of the first capacitor bank is connected with the second input end of the filtering energy storage module, and the first output end of the first capacitor bank is connected with the voltage stabilizing end of the filtering energy storage module; a first output end of the first capacitor bank is connected with a first input end of the second capacitor bank through the first inductor L1, and a second output end of the first capacitor bank is connected with a second input end of the second capacitor bank through the second inductor L2; and the output end of the second capacitor bank is connected with the output end of the filtering energy storage module.
In one implementation example, as shown in fig. 3, the first capacitor bank includes a first capacitor C1 and a second capacitor C2 connected in parallel; the second capacitor bank comprises a third capacitor C3, a fourth capacitor C4 and a fifth capacitor C5 which are connected in parallel, and one end of the fifth capacitor C5 is grounded. Specifically, a first end of the first capacitor C1 is connected to a first input end of the first capacitor bank, and a second end of the first capacitor C1 is connected to a second input end of the first capacitor bank; a first end of the second capacitor C2 is connected with a first end of the first capacitor C1, and a second end of the second capacitor C2 is connected with a second end of the first capacitor C1; a first terminal of the second capacitor C2 is connected to the first output terminal of the first capacitor bank, and a second terminal of the second capacitor C2 is connected to the second output terminal of the first capacitor bank. A first end of a third capacitor C3 is connected to the first input terminal of the second capacitor bank, and a second end of the third capacitor C3 is connected to the second input terminal of the second capacitor bank; a first terminal of the fourth capacitor C4 is connected to a first terminal of the third capacitor C3, and a second terminal of the fourth capacitor C4 is connected to a second terminal of the third capacitor C3; a first terminal of the fifth capacitor C5 is connected to a first terminal of the fourth capacitor C4, and a second terminal of the fifth capacitor C5 is connected to a second terminal of the fourth capacitor C4; a first terminal of a fifth capacitor C5 is connected to the first output terminal of the second capacitor bank and a second terminal of the fifth capacitor C5 is connected to the second output terminal of the second capacitor bank.
EXAMPLE III
Fig. 3 is a schematic flow chart of a method for detecting ignition and misfire of an automobile according to a third embodiment of the present application. The embodiment can be applied to application scenes for detecting the ignition and flameout states of the automobile. The method can be executed by a controller, and the controller can be an intelligent terminal, a tablet or a PC; in the embodiment of the present application, a controller is taken as an execution subject to be described, and the method specifically includes the following steps:
and S110, receiving an ignition detection signal sent by the ignition detection module and a flameout detection signal sent by the flameout detection module in real time.
For the low-cost and effective realization car ignition and two detections of putting out a fire, set up voltage division module, ignition detection module and putting out a fire detection module and constitute the car ignition and two detection circuits of putting out a fire on the basis of the original load of car own device circuit, realize the car ignition and two detections of putting out a fire to solve the detection branch road with high costs, occupation space is big and can't carry out the problem that the car put out a fire and detect. The double detection circuit for ignition and flameout of the automobile can comprise: the automobile ignition device comprises an automobile generator, an automobile storage battery, a one-way conduction pipe, a filtering energy storage module, a voltage division module, an ignition detection module and a flameout detection module.
Specifically, the generator is connected with the automobile storage battery in parallel, the anode of the automobile storage battery is connected with the first input end of the filtering energy storage module through a one-way conduction tube, and the cathode of the automobile storage battery is connected with the second input end of the filtering energy storage module; the output end of the filtering energy storage module is connected with a load. The input end of the voltage division module is connected with the anode of the one-way conduction tube and used for balancing the voltage drop and the voltage division of the one-way conduction tube and outputting the voltage after voltage division to the detection end of the ignition detection module and the detection end of the flameout detection module; the reference end of the flameout detection module is connected with a preset reference power supply, and the reference end of the ignition detection module is connected with the voltage stabilizing end of the filtering energy storage module 40. The controller receives flameout detection signals output by the flameout detection module after comparing the voltages of the detection end and the reference end in real time; and the controller receives an ignition detection signal output by the ignition detection module after comparing the voltages of the detection end and the reference end in real time.
And S120, if the ignition detection signal is turned over, outputting the detection result of the automobile ignition.
In the ignition detection process, the voltage of the detection end of the ignition detection module is a voltage value obtained by offsetting the voltage difference of the one-way conduction tube by the voltage division module on the voltage of the positive end of the one-way conduction tube and dividing the voltage; the reference end voltage of the ignition detection module is the negative end voltage of the unidirectional conduction tube 30 after voltage stabilization by the capacitor.
Optionally, the ignition detection module may be constituted by a first comparator; the detection end of the ignition detection module is the non-inverting input end of the first comparator, and the reference end is the inverting input end of the first comparator. When the automobile is not ignited, the voltage of the non-inverting input end of the first comparator is larger than that of the inverting input end, and an ignition detection signal output to the controller by the output end of the first comparator is logic '1'. When an automobile is ignited, the input voltage drop of a circuit when the automobile is ignited is judged through the first comparator, and due to the action of the unidirectional conduction tube and the capacitor in the filtering energy storage module connected at the later stage, the voltage drop of the reverse phase input end of the first comparator is slower than that of the in-phase input end of the first comparator; at this time, the voltage of the inverting input terminal of the first comparator is greater than that of the non-inverting input terminal, the ignition detection signal output from the output terminal of the first comparator to the controller is logic "0", and the level of the ignition detection signal is inverted. Therefore, when the controller detects that the level of the ignition detection signal output by the output end of the first comparator U1 is reversed, the controller can judge that the automobile has the ignition action, so that the detection result of the automobile ignition is output, and the detection of the automobile ignition action is realized.
And S130, if the flameout detection signal is overturned twice, outputting the detection result of the flameout of the automobile.
In the flameout detection process, the voltage of the detection end of the flameout detection module is a voltage value obtained by offsetting the voltage difference of the unidirectional conduction tube by the voltage division module on the voltage of the positive end of the unidirectional conduction tube and dividing the voltage; and the reference voltage of the flameout detection module is a preset reference voltage Vref.
Before the automobile is ignited to start the engine to start, the automobile storage battery 20 supplies power, and the maximum voltage of a circuit is 12.8V; when the automobile is ignited, the power is supplied by the generator 10, the automobile storage battery 20 is used as the charging filter of the whole automobile, and the normal voltage range of the circuit is 13.2V-14.8V after the engine is started. When the automobile is shut down, the circuit voltage drops below 13.2V. In one embodiment, according to the state of the circuit voltage after the vehicle is turned off, the detection threshold voltage of the key-off detection module may be set to 13.25V, and the preset reference voltage Vref may be set according to the detection threshold voltage value, the voltage dividing module and the performance parameters of the key-off detection module. When the voltage of the positive terminal of the unidirectional conduction tube is less than 13.25V, the voltage of the detection terminal of the flameout detection module is less than the voltage Vref of the reference terminal.
Optionally, the misfire detection module may be constituted by a second comparator; the detection end of the flameout detection module is the non-inverting input end of the second comparator, and the reference end is the inverting input end of the second comparator. When the automobile is not ignited, the voltage of the circuit is 12.8V at most, the voltage of the inverting input end of the second comparator is larger than that of the non-inverting input end, and an ignition detection signal output from the output end of the second comparator to the controller is logic '0'. When the automobile is ignited and started, the normal voltage range of the circuit is 13.2V-14.8V, the voltage of the non-inverting input end of the second comparator is larger than that of the inverting input end, the ignition detection signal output by the output end of the second comparator to the controller is logic '1', and the ignition detection signal is subjected to level inversion once. When the automobile is flamed out, the circuit voltage drops to be lower than 13.2V, the voltage of the inverting input end of the second comparator is larger than that of the non-inverting input end, the ignition detection signal output by the output end of the second comparator to the controller is logic '0', and the ignition detection signal is subjected to secondary level inversion. Therefore, when the controller detects that the flameout detection signal output by the output end of the second comparator is subjected to level reversal twice, the automobile can be judged to have flameout action, so that the detection result of automobile flameout is output, and the detection of the flameout action of the automobile is realized.
Example four
Fig. 4 is a schematic structural diagram of a dual ignition and misfire detection system of an automobile according to a fourth embodiment of the present application. The system comprises a double detection circuit for automobile ignition and flameout and a controller 5; the dual detection circuit for ignition and flameout of the vehicle may be the dual detection circuit for ignition and flameout of the vehicle in the first embodiment or the second embodiment. The controller includes: a processor 41, a memory 42 and a computer program 43 stored in said memory 42 and executable on said processor 41, such as a program for a data processing method for multiple data centers. The processor 41 executes the computer program 43 to implement the steps of the above-mentioned embodiment of the dual detection method for ignition and misfire of the vehicle, such as the steps S110 to S130 shown in fig. 4.
The controller may include, but is not limited to, a processor 41, a memory 42, and a computer program 43 stored in the memory 42. Those skilled in the art will appreciate that fig. 4 is merely an example of a controller, and does not constitute a limitation on the controller, and may include more or fewer components than shown, or combine certain components, or different components, e.g., the controller may also include input-output devices, network access devices, buses, etc.
The Processor 41 may be a Central Processing Unit (CPU), other general purpose Processor, a Digital Signal Processor (DSP), an Application Specific Integrated Circuit (ASIC), an off-the-shelf Programmable Gate Array (FPGA) or other Programmable logic device, discrete Gate or transistor logic device, discrete hardware component, etc. A general purpose processor may be a microprocessor or the processor may be any conventional processor or the like.
The memory 42 may be an internal storage unit of the controller, such as a hard disk or a memory of the controller. The memory 42 may also be an external storage device, such as a plug-in hard disk provided on the controller, a Smart Memory Card (SMC), a Secure Digital (SD) Card, a Flash memory Card (Flash Card), or the like. Further, the memory 42 may also include both an internal storage unit of the controller and an external storage device. The memory 42 is used for storing the computer program and other programs and data required for the dual detection method of ignition and misfire of the vehicle. The memory 42 may also be used to temporarily store data that has been output or is to be output.
It will be apparent to those skilled in the art that, for convenience and brevity of description, only the above-mentioned division of the functional units and modules is illustrated, and in practical applications, the above-mentioned function distribution may be performed by different functional units and modules according to needs, that is, the internal structure of the apparatus is divided into different functional units or modules to perform all or part of the above-mentioned functions. Each functional unit and module in the embodiments may be integrated in one processing unit, or each unit may exist alone physically, or two or more units are integrated in one unit, and the integrated unit may be implemented in a form of hardware, or in a form of software functional unit. In addition, specific names of the functional units and modules are only for convenience of distinguishing from each other, and are not used for limiting the protection scope of the present application. The specific working processes of the units and modules in the system may refer to the corresponding processes in the foregoing method embodiments, and are not described herein again.
In the above embodiments, the descriptions of the respective embodiments have respective emphasis, and reference may be made to the related descriptions of other embodiments for parts that are not described or illustrated in a certain embodiment.
Those of ordinary skill in the art will appreciate that the various illustrative elements and algorithm steps described in connection with the embodiments disclosed herein may be implemented as electronic hardware or combinations of computer software and electronic hardware. Whether such functionality is implemented as hardware or software depends upon the particular application and design constraints imposed on the implementation. Skilled artisans may implement the described functionality in varying ways for each particular application, but such implementation decisions should not be interpreted as causing a departure from the scope of the present application.
In the embodiments provided in the present application, it should be understood that the disclosed apparatus/terminal device and method may be implemented in other ways. For example, the above-described embodiments of the apparatus/terminal device are merely illustrative, and for example, the division of the modules or units is only one logical division, and there may be other divisions when actually implemented, for example, a plurality of units or components may be combined or integrated into another system, or some features may be omitted, or not executed. In addition, the shown or discussed mutual coupling or direct coupling or communication connection may be an indirect coupling or communication connection through some interfaces, devices or units, and may be in an electrical, mechanical or other form.
The units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the units can be selected according to actual needs to achieve the purpose of the solution of the embodiment. In addition, functional units in the embodiments of the present application may be integrated into one processing unit, or each unit may exist alone physically, or two or more units are integrated into one unit. The integrated unit can be realized in a form of hardware, and can also be realized in a form of a software functional unit.
The integrated modules/units, if implemented in the form of software functional units and sold or used as separate products, may be stored in a computer readable storage medium. Based on such understanding, all or part of the flow in the method of the embodiments described above can be realized by a computer program, which can be stored in a computer-readable storage medium and can realize the steps of the embodiments of the methods described above when the computer program is executed by a processor. Wherein the computer program comprises computer program code, which may be in the form of source code, object code, an executable file or some intermediate form, etc. The computer-readable medium may include: any entity or device capable of carrying the computer program code, recording medium, usb disk, removable hard disk, magnetic disk, optical disk, computer Memory, Read-Only Memory (ROM), Random Access Memory (RAM), electrical carrier wave signals, telecommunications signals, software distribution medium, and the like. It should be noted that the computer readable medium may contain content that is subject to appropriate increase or decrease as required by legislation and patent practice in jurisdictions, for example, in some jurisdictions, computer readable media does not include electrical carrier signals and telecommunications signals as is required by legislation and patent practice.
The above-mentioned embodiments are only used for illustrating the technical solutions of the present application, and not for limiting the same; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not substantially depart from the spirit and scope of the embodiments of the present application and are intended to be included within the scope of the present application.
Claims (10)
1. A double detection circuit for ignition and flameout of an automobile is characterized by comprising the following components: the device comprises a generator, an automobile storage battery, a one-way conduction pipe, a filtering energy storage module, a voltage division module, an ignition detection module and a flameout detection module of an automobile; wherein the content of the first and second substances,
the generator is connected with the automobile storage battery in parallel, the anode of the automobile storage battery is connected with the first input end of the filtering energy storage module through the one-way conduction pipe, and the cathode of the automobile storage battery is connected with the second input end of the filtering energy storage module; the output end of the filtering energy storage module is connected with a load;
the input end of the voltage division module is connected with the anode of the one-way conduction tube and is used for balancing the voltage drop and the voltage division of the one-way conduction tube and outputting the voltage after voltage division to the detection end of the ignition detection module and the detection end of the flameout detection module;
the reference end of the flameout detection module is connected with a preset reference voltage, and the reference end of the ignition detection module is connected with the voltage stabilizing end of the filtering energy storage module; the flameout detection module is used for comparing the voltages of the detection end and the reference end and outputting a flameout detection signal to the controller; the ignition detection module is used for comparing the voltages of the detection end and the reference end and outputting an ignition detection signal to the controller.
2. The dual detection circuit for ignition and misfire in an automobile according to claim 1, wherein the voltage dividing module includes a first resistor and a second resistor;
the first end of the first resistor is connected with the input end of the voltage division module, and the second end of the first resistor is connected with the first end of the second resistor; the first end of the second resistor is connected with the detection end of the ignition detection module and the detection end of the flameout detection module, and the second end of the second resistor is grounded.
3. The dual detection circuit for ignition and misfire in an automobile according to claim 2, wherein the ignition detection module includes a first comparator; the misfire detection module comprises a second comparator;
the non-inverting input end of the first comparator is connected with the detection end of the ignition detection module, the inverting input end of the first comparator is connected with the reference end of the ignition detection module, and the output end of the first comparator is connected with the controller;
the non-inverting input end of the second comparator is connected with the detection end of the flameout detection module, the inverting input end of the second comparator is connected with the reference end of the flameout detection module, and the output end of the second comparator is connected with the controller.
4. The dual detection circuit for ignition and misfire in an automobile according to claim 3, wherein the dual detection circuit further comprises a current fuse;
the positive pole of the automobile storage battery is connected with the positive pole of the one-way conduction pipe through the current fuse, and the negative pole of the one-way conduction pipe is connected with the first input end of the filtering energy storage module.
5. The dual detection circuit for ignition and misfire in an automobile according to claim 4, wherein the dual detection circuit further comprises a TVS tube;
the positive pole of TVS pipe with the second input of filtering energy storage module is connected, the negative pole of TVS pipe with the positive pole of one-way conduction pipe is connected.
6. The dual ignition and misfire detection circuit for an automobile according to claim 5, wherein the preset reference voltage is set according to performance parameters of the misfire detection module and the voltage division module.
7. The dual detection circuit for ignition and flameout of an automobile according to claim 6, wherein the filtering energy storage module comprises a first capacitor bank, a first inductor, a second inductor and a second capacitor bank;
the first input end of the first capacitor bank is connected with the first input end of the filtering energy storage module, the second input end of the first capacitor bank is connected with the second input end of the filtering energy storage module, and the first output end of the first capacitor bank is connected with the voltage stabilizing end of the filtering energy storage module; a first output end of the first capacitor bank is connected with a first input end of the second capacitor bank through the first inductor, and a second output end of the first capacitor bank is connected with a second input end of the second capacitor bank through the second inductor; and the output end of the second capacitor bank is connected with the output end of the filtering energy storage module.
8. The dual detection circuit for ignition and misfire in an automobile according to claim 7, wherein said first capacitor bank comprises a first capacitor and a second capacitor connected in parallel; the second capacitor group comprises a third capacitor, a fourth capacitor and a fifth capacitor which are connected in parallel, and one end of the fifth capacitor is grounded.
9. A double detection method for ignition and flameout of an automobile is characterized by comprising the following steps:
receiving an ignition detection signal sent by an ignition detection module and a flameout detection signal sent by a flameout detection module in real time;
if the ignition detection signal is turned over, outputting a detection result of automobile ignition;
and if the flameout detection signal is overturned twice, outputting the flameout detection result of the automobile.
10. The double detection system for ignition and flameout of the automobile is characterized by comprising a double detection circuit for ignition and flameout of the automobile and a controller; wherein the content of the first and second substances,
the controller performs the steps of the method for dual detection of ignition and misfire of an automobile as recited in claim 9.
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| CN202010321690.6A CN111546999A (en) | 2020-04-22 | 2020-04-22 | Double detection circuit, method and system for ignition and flameout of automobile |
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| CN202010321690.6A CN111546999A (en) | 2020-04-22 | 2020-04-22 | Double detection circuit, method and system for ignition and flameout of automobile |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864096A (en) * | 2021-09-28 | 2021-12-31 | 黑龙江科技大学 | Parking heater flameout protection device and working method thereof |
| CN113978389A (en) * | 2021-10-29 | 2022-01-28 | 北京乐驾科技有限公司 | Detection circuit, system and method for automobile ignition, electronic equipment and storage medium |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104260677A (en) * | 2014-09-18 | 2015-01-07 | 深圳市双赢伟业科技股份有限公司 | Vehicle power supply control circuit and car |
| CN104635520A (en) * | 2013-11-12 | 2015-05-20 | 重庆金美通信有限责任公司 | Power supply switch control circuit with power down delay function |
| CN105422360A (en) * | 2015-11-30 | 2016-03-23 | 深圳市轱辘软件开发有限公司 | Detecting circuit for automobile ignition action |
| CN105467247A (en) * | 2015-12-17 | 2016-04-06 | 上海移为通信技术股份有限公司 | Detection circuit and method for ignition and flameout identification based on vehicle battery voltage change |
| WO2018235790A1 (en) * | 2017-06-22 | 2018-12-27 | 日立オートモティブシステムズ株式会社 | Vehicle control device |
-
2020
- 2020-04-22 CN CN202010321690.6A patent/CN111546999A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104635520A (en) * | 2013-11-12 | 2015-05-20 | 重庆金美通信有限责任公司 | Power supply switch control circuit with power down delay function |
| CN104260677A (en) * | 2014-09-18 | 2015-01-07 | 深圳市双赢伟业科技股份有限公司 | Vehicle power supply control circuit and car |
| CN105422360A (en) * | 2015-11-30 | 2016-03-23 | 深圳市轱辘软件开发有限公司 | Detecting circuit for automobile ignition action |
| CN105467247A (en) * | 2015-12-17 | 2016-04-06 | 上海移为通信技术股份有限公司 | Detection circuit and method for ignition and flameout identification based on vehicle battery voltage change |
| WO2018235790A1 (en) * | 2017-06-22 | 2018-12-27 | 日立オートモティブシステムズ株式会社 | Vehicle control device |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113864096A (en) * | 2021-09-28 | 2021-12-31 | 黑龙江科技大学 | Parking heater flameout protection device and working method thereof |
| CN113864096B (en) * | 2021-09-28 | 2022-08-26 | 黑龙江科技大学 | Parking heater flameout protection device and working method thereof |
| CN113978389A (en) * | 2021-10-29 | 2022-01-28 | 北京乐驾科技有限公司 | Detection circuit, system and method for automobile ignition, electronic equipment and storage medium |
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