CN214428201U - Automobile ignition analog circuit - Google Patents

Abstract

The application discloses an automobile ignition analog circuit, wherein an infrared trigger circuit comprises an infrared receiving tube, a third resistor and a fourth resistor, and the infrared trigger circuit is used for providing a trigger level so as to trigger a gate logic circuit to act; the gate logic circuit mainly controls the action of the boosting ignition circuit through the change condition of the level; the boost ignition circuit comprises a fifth resistor, a transistor, an inductor, a reverse bias diode and a second capacitor and is used for generating ignition voltage. The method and the device solve the technical problem that in the prior art, the triggering process is complex in the awakening test process of automobile ignition, more resources are occupied, the requirement of a large number of awakening tests cannot be met, and the actual execution process is lack of high efficiency.

Description

Automobile ignition analog circuit

Technical Field

The application relates to the technical field of vehicle-mounted voltage control, in particular to an automobile ignition analog circuit.

Background

With the rapid development of the automobile industry, the central control vehicle-mounted entertainment system is increasingly complicated and diversified. When many entertainment functions perform a vehicle ignition instant (Cranking) operation in the course of operation, various abnormal behaviors are caused due to instantaneous abnormal changes in voltage. The tester needs to simulate according to actual conditions and realize verification tests, and the simulation mode is either real vehicle test or equipment instrument simulation. For various complex conditions to be tested, the equipment instrument simulation can obviously better adapt to the verification test tasks of various complex states.

In the prior art, when a product is awakened and tested, CAN bus data needs to be acquired through a processor for processing, then an ignition signal is transmitted, and a terminal is awakened, so that the development of the processor occupies more resources. In addition, in the product testing stage, an accurate automobile simulator or a real automobile is needed as a testing environment, when the number of wake-up function testing items is large, the requirement on the number of ignition triggering times is increased due to the increase of the number of products, the flow is more complex, and the wake-up testing is lack of high efficiency.

SUMMERY OF THE UTILITY MODEL

The application provides a car ignition analog circuit for it is more complicated to solve prior art and to trigger the flow at the awakening test in-process of car ignition, not only occupies more resource, still can't be applicable to a large amount of test demands of awakening up, leads to the technical problem that actual implementation process lacks the high efficiency.

In view of the above, the first aspect of the present application provides an automobile ignition analog circuit, comprising: the infrared trigger circuit, the gate logic circuit and the boost ignition circuit;

the infrared trigger circuit comprises an infrared receiving tube, a third resistor and a fourth resistor, and is used for providing a trigger level;

the gate logic circuit comprises a first resistor, a second resistor, a first capacitor, a first NAND gate, a second NAND gate, a third NAND gate, a fourth NAND gate, a fifth NAND gate and a sixth NAND gate;

the input end of the first nand gate is connected with the first end of the first resistor, the first end of the second resistor, the first end of the first capacitor, the input end of the fourth nand gate, the input end of the fifth nand gate and the output end respectively;

the input end of the second NAND gate is respectively connected with the infrared trigger circuit, the output end of the first NAND gate and the output end of the fourth NAND gate;

the input end of the third NAND gate is respectively connected with the infrared trigger circuit, the output end of the first NAND gate and the output end of the fourth NAND gate;

the input end of the fourth NAND gate is respectively connected with the output end of the second NAND gate and the infrared trigger circuit;

the input end of the fifth NAND gate is respectively connected with the output end of the third NAND gate and the output end of the sixth NAND gate;

the input end of the sixth nand gate is connected with the infrared trigger circuit, the output end of the fourth nand gate and the output end of the fifth nand gate respectively, and the output end of the sixth nand gate is connected with the boost ignition circuit;

the boosting ignition circuit comprises a fifth resistor, a transistor, an inductor, a reverse bias diode and a second capacitor and is used for generating ignition voltage.

Optionally, an input end of the infrared receiving tube is connected to a first end of the third resistor and a first end of the fourth resistor respectively;

and the second end of the third resistor is respectively connected with the second end of the first resistor, the power supply and the first end of the inductor.

Optionally, the second end of the second resistor, the second end of the fourth resistor, and the second end of the first capacitor are all grounded.

Optionally, the method further includes: an inverter;

the input end of the phase inverter is connected with the output end of the sixth NAND gate, and the output end of the phase inverter is connected with the first end of the fifth resistor.

Optionally, the second end of the fifth resistor is connected to the base of the transistor;

the collector of the transistor is respectively connected with the second end of the inductor and the input end of the reverse bias diode;

the output end of the reverse bias diode is respectively connected with a circuit voltage output port and the first end of the second capacitor;

and the emitter of the transistor and the second end of the second capacitor are both grounded.

Optionally, the first nand gate, the second nand gate, the third nand gate, the fourth nand gate, the fifth nand gate, and the sixth nand gate are all three nand gates with the same structure.

According to the technical scheme, the embodiment of the application has the following advantages:

in this application, a car ignition analog circuit is provided, includes: the infrared trigger circuit comprises an infrared receiving tube, a third resistor and a fourth resistor, and is used for providing a trigger level; the gate logic circuit comprises a first resistor, a second resistor, a first capacitor, a first NAND gate, a second NAND gate, a third NAND gate, a fourth NAND gate, a fifth NAND gate and a sixth NAND gate; the input end of the first NAND gate is respectively connected with the first end of the first resistor, the first end of the second resistor, the first end of the first capacitor, the input end of the fourth NAND gate, the input end of the fifth NAND gate and the output end; the input end of the second NAND gate is respectively connected with the infrared trigger circuit, the output end of the first NAND gate and the output end of the fourth NAND gate; the input end of the third NAND gate is respectively connected with the infrared trigger circuit, the output end of the first NAND gate and the output end of the fourth NAND gate; the input end of the fourth NAND gate is respectively connected with the output end of the second NAND gate and the infrared trigger circuit; the input end of the fifth NAND gate is respectively connected with the output end of the third NAND gate and the output end of the sixth NAND gate; the input end of the sixth NAND gate is respectively connected with the infrared trigger circuit, the output end of the fourth NAND gate and the output end of the fifth NAND gate, and the output end of the sixth NAND gate is connected with the boost ignition circuit; the boost ignition circuit comprises a fifth resistor, a transistor, an inductor, a reverse bias diode and a second capacitor and is used for generating ignition voltage.

The automobile ignition simulation circuit is simple in circuit structure, a complex processor is not introduced, an automobile ignition task is mainly achieved through the level change condition of a gate logic circuit, and the circuit is provided with low-cost components without cost pressure; the awakening mode is that the infrared trigger circuit generates trigger level, and finally the boost ignition circuit outputs awakening voltage to realize ignition. Therefore, the method and the device can solve the technical problem that in the prior art, the triggering process is complex in the awakening test process of automobile ignition, more resources are occupied, the requirements of a large number of awakening tests cannot be met, and the actual execution process is lack of high efficiency.

Drawings

FIG. 1 is a schematic circuit diagram of an automobile ignition analog circuit provided by the present application;

FIG. 2 is an application scene diagram of an automobile ignition simulation circuit based on an on-board OBD terminal provided by the present application;

reference numerals:

an infrared trigger circuit 1; a gate logic circuit 2; a booster ignition circuit 3; a first resistor R1; a second resistor R2; a third resistor R3; a fourth resistor R4; a fifth resistor R5; a first capacitance C1; a second capacitance C2; an inductance L1; an inverter P1; a first nand gate G1; a second nand gate G2; a third nand gate G3; a fourth nand gate G4; a fifth nand gate G5; a sixth nand gate G6; an infrared receiving tube D1; reverse-biased diode D2; a transistor Q1;

firstly, an OBD power line; secondly, moving a power supply; PCBA of the vehicle-mounted OBD terminal; fourthly, carrying out an OBD terminal; and fifthly, a mobile phone terminal or an infrared remote control trigger.

Detailed Description

In order to make the technical solutions of the present application better understood, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, and not all of the 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.

In the description of the embodiments of the present application, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience in describing the embodiments of the present application and simplifying the description, but do not indicate or imply that the referred devices or elements must have specific orientations, be configured in specific orientations, and operate, and thus, should not be construed as limiting the embodiments of the present application. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.

In the description of the embodiments of the present application, it should be noted that the terms "mounted," "connected," and "connected" are to be construed broadly and may be, for example, fixedly connected, detachably connected, or integrally connected unless explicitly stated or limited otherwise; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. Specific meanings of the above terms in the embodiments of the present application can be understood in specific cases by those of ordinary skill in the art.

For easy understanding, referring to fig. 1, the present application provides an automobile ignition analog circuit, comprising: infrared trigger circuit 1, gate logic circuit 2 and boost ignition circuit 3.

The infrared trigger circuit 1 comprises an infrared receiving tube D1, a third resistor R3 and a fourth resistor R4, and the infrared trigger circuit 1 is used for providing a trigger level; the third resistor R3 and the fourth resistor R4 in the infrared trigger circuit 1 are mainly used for voltage division, and when the OBD terminal of the automobile is in a dormant state, the third resistor R3 and the fourth resistor R4 can be divided into appropriate voltages to be supplied to the infrared receiving tube D1, so that the output end of the infrared receiving tube D1 outputs a high level.

The gate logic circuit 2 mainly includes a first nand gate G1, a second nand gate G2, a third nand gate G3, a fourth nand gate G4, a fifth nand gate G5, and a sixth nand gate G6, and in addition, includes voltage dividing resistors, such as a first resistor R1 and a second resistor R2. Specifically, the input end of the first nand gate G1 is respectively connected to the first end of the first resistor R1, the first end of the second resistor R2, the first end of the first capacitor C1, the input end of the fourth nand gate G4, the input end and the output end of the fifth nand gate G5; the input end of the second nand gate G2 is respectively connected with the infrared trigger circuit 1, the output end of the first nand gate G1 and the output end of the fourth nand gate G4; the input end of the third nand gate G3 is connected with the infrared trigger circuit 1, the output end of the first nand gate G1 and the output end of the fourth nand gate G4 respectively; the input end of the fourth nand gate G4 is connected with the output end of the second nand gate G2 and the infrared trigger circuit 1 respectively; the input end of the fifth nand gate G5 is connected to the output end of the third nand gate G3 and the output end of the sixth nand gate G6, respectively; the input end of the sixth nand gate G6 is connected to the infrared trigger circuit 1, the output end of the fourth nand gate G4 and the output end of the fifth nand gate G5, respectively, and the output end of the sixth nand gate G6 is connected to the boost ignition circuit 3.

Referring to fig. 1, the six nand gates each include 4 connecting pins and have the same structure, where pins 1, 2 and 3 are input terminals of the nand gate, and pin 4 is an output terminal of the nand gate. For convenience of understanding and description, the connection pins of the nand gates are labeled as Gn _ m, where n is a serial number of the nand gate, and m is a serial number of the connection pin, for example, pin 1 of the first nand gate is G1_1, and pin 2 is G1_ 2.

It should be understood that the output terminal of the gate logic circuit in this embodiment is the output terminal 4 pin G6_4 of the sixth nand gate G6. Therefore, the analysis and judgment of the overall operation of the nand gate is based on the voltage output state at G6_4, and the level situation at G6_4 can be affected by the change in the trigger level of the infrared receiver tube D1, which differs in the power-on state of the on-board OBD terminal. The booster ignition circuit 3 is then influenced according to the voltage state at G6_ 4.

The output level of the NAND gate group can be judged and analyzed according to different power-on states:

1) at the moment that the vehicle-mounted OBD terminal is powered on, due to the non-mutability of the first capacitor C1, the 2 pin G1_2 input to the first NAND gate G1, the 1 pin G4_1 of the fourth NAND gate G4 and the 1 pin G5_1 of the fifth NAND gate G5 are all low level, and then the 4 pin G4_4 of the fourth NAND gate G4 and the 2 pin G6_2 of the sixth NAND gate G6 are both high level; due to the voltage division of the fourth resistor R4, the pin G6_3 of the sixth nand gate G6 is at a high level, and the pin G5_1 of the fifth nand gate G5 is at a low level, so the pin G5_4 of the fifth nand gate G5 and the pin G6_1 of the sixth nand gate G6 are both at a high level, and the pin G6_4 of the sixth nand gate G6 is at a low level.

2) After the on-vehicle OBD terminal is powered on, the first capacitor C1 is charged through the first resistor R1, at this time, the 2 leg G1_2 of the first nand gate G1, the 1 leg G4_1 of the fourth nand gate G4 and the 1 leg G5_1 of the fifth nand gate G5 are all at high level, as can be seen from the above analysis, the 4 leg G1_4 of the first nand gate G1 and the 4 leg G1_4 of the fourth nand gate G4 are both at high level, the 1 leg G1_1 of the second nand gate G1 and the 3 leg G1_3 of the second nand gate G1 are both at high level, the 4 leg G1_4 of the second nand gate G1 is at low level, the 3 leg G1_3 of the third nand gate G1 and the 2 leg G1_2 of the sixth nand gate G1 are both at high level, and the 1 leg G1 of the third nand gate G1 is at high level, the sixth nand gate G1 is at high level, since the pin 3G 6_3 of the sixth nand gate G6 is at high level, the pin 4G 6_4 of the sixth nand gate G6 still outputs low level, which means that the pin 4G 6_4 of the sixth nand gate G6 keeps outputting low level until the vehicle OBD terminal is in sleep after the vehicle OBD terminal is powered on instantaneously.

3) When the signal is transmitted by using a mobile phone or an infrared trigger, the infrared receiving tube D1 generates signal waveforms of falling edge and rising edge. That is, the output OUT of the infrared receiving tube D1 first outputs a low level (falling edge), the 4G 3_4 of the third nand gate G3 and the 2G 5_2 of the fifth nand gate G5 are high levels, the 4G 4_4 of the fourth nand gate G4 and the 2G 6_2 of the sixth nand gate G6 are high levels, since the 4G 6_4 of the sixth nand gate G6 is low level, the 4G 5_4 of the fifth nand gate G5 and the 1G 6_1 of the sixth nand gate G6 are high levels, and the 4G 6_4 of the sixth nand gate G6 remains low level.

4) When the infrared receiver D1 outputs OUT at a high level (rising edge), the 1G 4_1 of the fourth nand gate G4 and the 3G 4_3 of the fourth nand gate G4 are at a high level, as can be seen from the above 1)2)3), as the 1G 1_1 of the first nand gate G1, the 2G 1_2 of the first nand gate G1 and the 3G 1_3 of the first nand gate G1 are at a high level, the 4G 1_4 of the first nand gate G1 and the 1G 2_1 of the second nand gate G2 are at a low level, the 4G 2_4 of the second nand gate G2 is at a high level, and similarly, the 4G 4_4 of the fourth nand gate G4 is at a low level, and the 4G 6_4 of the sixth nand gate G6 is at a high level.

The boost ignition circuit 3 comprises a fifth resistor R5, a transistor Q1, an inductor L1, a reverse bias diode D2 and a second capacitor C2, and is used for generating ignition voltage and executing a vehicle-mounted terminal wake-up task.

By combining the above analysis, it can be found that different power-on or trigger mechanisms can enable the levels of the pins of different nand gates to be different, so that the level control of the boost ignition circuit is realized through the level conversion of the nand gate group, and further the vehicle-mounted terminal awakening operation is realized.

The automobile ignition simulation circuit provided by the embodiment of the application has a simple circuit structure, does not introduce a complex processor, mainly realizes an automobile ignition task through the level change condition of a gate logic circuit, and is provided with low-cost components without cost pressure; the awakening mode is that the infrared trigger circuit generates trigger level, and finally the boost ignition circuit outputs awakening voltage to realize ignition. Therefore, the technical problem that in the prior art, the triggering process is complex in the awakening test process of automobile ignition, more resources are occupied, the requirement of a large number of awakening tests cannot be met, and the actual execution process is lack of high efficiency can be solved.

As a modification of the above embodiment, further, the input terminals of the infrared receiving tube D1 are connected to the first terminal of the third resistor R3 and the first terminal of the fourth resistor R4, respectively; the second end of the third resistor R3 is connected to the second end of the first resistor R1, the power supply, and the first end of the inductor L1, respectively.

It can be understood that, this section describes a specific connection mode of the components of the infrared trigger circuit 1, as shown in fig. 1, the power supply is a 12V power supply, the vehicle OBD terminal maintains 12V power supply before and after entering sleep, the third resistor R3 and the fourth resistor R4 divide the voltage into appropriate voltages and supply the voltages to the infrared receiving tube D1, and at this time, the output OUT of the infrared receiving tube D1 is at a high level.

As a modification of the previous embodiment, the second terminal of the second resistor R2, the second terminal of the fourth resistor R4 and the second terminal of the first capacitor C1 are all grounded.

As an improvement of the above embodiment, further, the method further includes: an inverter P1; the input terminal of the inverter P1 is connected to the output terminal of the sixth nand gate G6, and the output terminal of the inverter P1 is connected to the first terminal of the fifth resistor R5.

It should be noted that the output terminal of the gate logic circuit 2 is G6_4, when G6_4 is high, the output of the inverter P1 is low, otherwise, the output of the inverter P1 is high.

As an improvement of the previous embodiment, further, the specific connection relationship of each device in the boost ignition circuit 3 in the embodiment of the present application is: a second end of the fifth resistor R5 is connected with the base of the transistor Q1; the collector of the transistor Q1 is connected to the second terminal of the inductor L1 and the input terminal of the reverse biased diode D2, respectively; the output end of the reverse bias diode D2 is respectively connected with the circuit voltage output port VCC _ OUT and the first end of the second capacitor C2; the emitter of the transistor Q1 and the second terminal of the second capacitor C2 are both grounded.

The specific triggering mechanism of the boost ignition circuit 3 can be divided into two types:

1) at the moment of electrifying the vehicle-mounted OBD terminal, the base electrode of the transistor Q1 is at a high level, the transistor Q1 is conducted, the inductor L1 is charged by the power supply, the charging state is continued until the rising edge of the trigger signal occurs, namely when the 4 pin G6_4 of the sixth NAND gate G6 outputs a high level, and the transistor Q1 is disconnected when the inverter P1 outputs a low level.

2) After the vehicle-mounted OBD terminal is powered on, the inductor L1 and the second capacitor C2 are charged, the voltage value of two ends of the second capacitor C2 reaches 12V, when an infrared trigger signal enables the transistor Q1 to be disconnected, the inductor L1 charges the second capacitor C2 through the reverse bias diode D2, namely the voltage of two ends of the second capacitor C2 is increased, and if the voltage exceeds a set ignition voltage threshold value, the vehicle-mounted OBD terminal is awakened.

By combining the above analysis, after the on-board OBD terminal is powered on, the transistor Q1 is turned on through the gate logic circuit 2, the inductor L1 is charged, when the infrared receiving tube D1 receives a trigger signal (the rising edge is valid), the transistor Q1 is not turned on, the inductor L1 charges the second capacitor C2, so that the voltage across the second capacitor C2 rises and exceeds the ignition voltage threshold, and ignition is completed. Therefore, the automobile ignition infrared trigger circuit based on the simulation of the vehicle-mounted OBD terminal in the embodiment of the application can simulate ignition of a large number of vehicle-mounted OBD products, so that more convenient conditions are provided for the awakening test process of the vehicle-mounted OBD products, for example, test items such as the positioning capability and the data transmission stability of the terminal during awakening.

As an improvement of the previous embodiment, further, the first nand gate, the second nand gate, the third nand gate, the fourth nand gate, the fifth nand gate and the sixth nand gate are all three nand gates with the same structure.

With the circuit applied to an actual scene, referring to fig. 2, the whole system mainly includes a mobile power supply, an OBD power line, a vehicle-mounted OBD terminal, an infrared receiving tube, and an infrared transmitter (a mobile phone or an infrared remote controller). The OBD power line is used for being connected with a vehicle-mounted OBD terminal of the mobile power supply; the mobile power supply is used for supplying power to the vehicle-mounted OBD terminal; the PCBA of the vehicle-mounted OBD terminal comprises an exposed infrared receiving tube; fourthly, the vehicle-mounted OBD terminal is obtained; a mobile phone terminal or an infrared remote control trigger.

The awakening process comprises the following steps:

1) after the vehicle-mounted OBD terminal enters a sleep mode, the mobile power supply maintains 12V power supply;

2) transmitting a signal to a vehicle-mounted OBD terminal by using a mobile phone or an infrared remote control trigger;

3) after infrared trigger signals are received by infrared receiving tubes in the vehicle-mounted OBD terminal, the vehicle-mounted OBD terminal is triggered to ignite through the automobile ignition analog circuit, and therefore the terminal is waken up.

The above 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; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims (6)

1. An automotive ignition analog circuit, comprising: the infrared trigger circuit, the gate logic circuit and the boost ignition circuit;

the infrared trigger circuit comprises an infrared receiving tube, a third resistor and a fourth resistor, and is used for providing a trigger level;

the gate logic circuit comprises a first resistor, a second resistor, a first capacitor, a first NAND gate, a second NAND gate, a third NAND gate, a fourth NAND gate, a fifth NAND gate and a sixth NAND gate;

the input end of the first nand gate is connected with the first end of the first resistor, the first end of the second resistor, the first end of the first capacitor, the input end of the fourth nand gate, the input end of the fifth nand gate and the output end respectively;

the input end of the second NAND gate is respectively connected with the infrared trigger circuit, the output end of the first NAND gate and the output end of the fourth NAND gate;

the input end of the third NAND gate is respectively connected with the infrared trigger circuit, the output end of the first NAND gate and the output end of the fourth NAND gate;

the input end of the fourth NAND gate is respectively connected with the output end of the second NAND gate and the infrared trigger circuit;

the input end of the fifth NAND gate is respectively connected with the output end of the third NAND gate and the output end of the sixth NAND gate;

the input end of the sixth nand gate is connected with the infrared trigger circuit, the output end of the fourth nand gate and the output end of the fifth nand gate respectively, and the output end of the sixth nand gate is connected with the boost ignition circuit;

the boosting ignition circuit comprises a fifth resistor, a transistor, an inductor, a reverse bias diode and a second capacitor and is used for generating ignition voltage.

2. The automobile ignition simulation circuit according to claim 1, wherein the input end of the infrared receiving tube is respectively connected with the first end of the third resistor and the first end of the fourth resistor;

and the second end of the third resistor is respectively connected with the second end of the first resistor, the power supply and the first end of the inductor.

3. The vehicle ignition simulation circuit of claim 1, wherein the second terminal of the second resistor, the second terminal of the fourth resistor, and the second terminal of the first capacitor are all grounded.

4. The automotive ignition simulation circuit of claim 1, further comprising: an inverter;

the input end of the phase inverter is connected with the output end of the sixth NAND gate, and the output end of the phase inverter is connected with the first end of the fifth resistor.

5. The automobile ignition analog circuit of claim 1, wherein a second terminal of the fifth resistor is connected to a base of the transistor;

the collector of the transistor is respectively connected with the second end of the inductor and the input end of the reverse bias diode;

the output end of the reverse bias diode is respectively connected with a circuit voltage output port and the first end of the second capacitor;

and the emitter of the transistor and the second end of the second capacitor are both grounded.

6. The automobile ignition simulation circuit of claim 1, wherein the first nand gate, the second nand gate, the third nand gate, the fourth nand gate, the fifth nand gate and the sixth nand gate are all three nand gates with the same structure.

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