CN219192122U

CN219192122U - Circuit for identifying ignition and flameout of vehicle

Info

Publication number: CN219192122U
Application number: CN202320386310.6U
Authority: CN
Inventors: 梁风雷
Original assignee: Shanghai Hyundai Information Technology Co ltd
Current assignee: Shanghai Hyundai Information Technology Co ltd
Priority date: 2023-03-03
Filing date: 2023-03-03
Publication date: 2023-06-16
Anticipated expiration: 2033-03-03

Abstract

The utility model discloses a circuit for identifying ignition and flameout of a vehicle, which is characterized by comprising an IO level detection module (M2), a main control module (M1), a first resistor (R16), a first diode (D4) and a first power supply (U1); one end of the first resistor (R16) is electrically connected with the first power supply (U1), and the other end of the first resistor is electrically connected with the anode of the first diode (D4); the detection module (M2) is electrically connected with the anode of the first diode (D4); the main control module (M1) is electrically connected with the cathode of the first diode (D4).

Description

Circuit for identifying ignition and flameout of vehicle

Technical Field

The utility model belongs to the technical field of the Internet of things, and particularly relates to a circuit for identifying ignition and flameout of a vehicle.

Background

The traditional 4G vehicle-mounted equipment generally records when the vehicle starts to travel and stops to travel through accurate ignition and flameout time of the vehicle, generally the traditional 4G vehicle-mounted equipment is awakened by the vibration of a three-axis sensor or a six-axis sensor when the vehicle is started, but along with popularization of electric vehicles, the traditional 4G vehicle-mounted equipment cannot ensure that the traditional 4G vehicle-mounted equipment is awakened simultaneously when the electric vehicles are started to enable the electric vehicles to normally run due to relative stability of the ignition of the electric vehicles.

Disclosure of Invention

The utility model aims to provide a circuit for identifying ignition and flameout of a vehicle.

The utility model provides a circuit for identifying ignition and flameout of a vehicle, which comprises an IO level detection module (M2), a main control module (M1), a first resistor (R16), a first diode (D4) and a first power supply (U1); one end of the first resistor (R16) is electrically connected with the first power supply (U1), and the other end of the first resistor is electrically connected with the anode of the first diode (D4); the detection module (M2) is electrically connected with the anode of the first diode (D4); the main control module (M1) is electrically connected with the cathode of the first diode (D4).

Preferably, the circuit for ignition and extinction of a vehicle identified by the utility model further comprises a second resistor (R14); one end of the second resistor (R14) is connected to the cathode of the first diode (D4), and the other end of the second resistor is grounded.

Preferably, the circuit for ignition and extinction of a vehicle identified by the utility model further comprises a third resistor (R15); the third resistor (R15) is connected between the cathode of the first diode (D4) and the main control module (M1).

Preferably, the resistance of the first resistor (R16) is greater than the resistance of the third resistor (R15); the resistance value of the third resistor (R15) is larger than the resistance value of the second resistor (R14).

Preferably, the resistance value of the first resistor (R16) is 560K; the resistance value of the second resistor (R14) is 15K; the resistance value of the third resistor (R15) is 56K; the voltage of the first power supply (U1) is 1.8V.

Preferably, the model of the first diode (D4) is 1N 4001W; the first resistor (R16), the second resistor (R14) and the third resistor (R15) are all 0402 in type.

The circuit for identifying the ignition and flameout of the vehicle provided by the utility model realizes the wake-up device by detecting the high and low levels output by the circuit, and overcomes the defect that the traditional device depends on the vibration of the three-axis sensor or the six-axis sensor to wake up the device when the vehicle is started.

Drawings

FIG. 1 is a schematic diagram of a circuit for identifying ignition and flameout of a vehicle according to the present utility model;

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

As shown in fig. 1, the circuit for identifying ignition and flameout of a vehicle provided in this embodiment includes an IO level detection module M2, a main control module M1, a first resistor R16, a first diode D4, and a first power supply U1; one end of the first resistor R16 is electrically connected with the first power supply U1, and the other end of the first resistor R16 is electrically connected with the anode of the first diode D4; the detection module M2 is electrically connected with the anode of the first diode D4; the main control module M1 is electrically connected with the cathode of the first diode D4. As will be appreciated by those skilled in the art, the main control module M1 is configured to be connected to an ignition device of an automobile, and the IO level detection module M2 is configured to be connected to a conventional 4G vehicle-mounted device. When the automobile is ignited and started, the main control module M1 outputs high voltage, and the voltage of the cathode of the first diode D4 is larger than the voltage of the anode of the first diode D4, so that the first diode D4 is in a cut-off state, the IO level detection module M2 is pulled up to be at the same potential with the first resistor R16, the IO level detection module M2 can always detect high level output, and the vehicle-mounted equipment is informed that the automobile is in an ignition state, and the vehicle-mounted equipment is awakened.

Further, the circuit for ignition and flameout of the vehicle identified in the present embodiment further includes a second resistor R14; one end of the second resistor R14 is connected to the cathode of the first diode D4, and the other end is grounded. It can be understood by those skilled in the art that when the automobile is flameout, the master control module M1 outputs a low level or a 0 level, the cathode of the first diode D4 is at 0 potential, the anode of the first diode D4 is at the same potential as the first resistor R16 and is larger than the conducting voltage of the first diode, so that the first diode D4 is in a conducting state, at this time, since the resistance values of the first resistor R16 and the second resistor R15 differ by a multiple, the IO level detection module M2 is pulled down to be close to 0, i.e. outputs a low level all the time, the vehicle-mounted device is informed that the automobile is in a flameout state, and meanwhile, the vehicle-mounted device enters a dormant state. The second resistor R14 is used to divide the circuit to determine the voltage at the diode cathode.

Further, the circuit for igniting and extinguishing the vehicle identified in the present embodiment further includes a third resistor R15; the third resistor R15 is connected between the cathode of the first diode D4 and the master control module M1. One skilled in the art will appreciate that the third resistor R15 is used to divide the voltage and the second resistor R14 is used together to determine the voltage at the diode cathode.

Further, the resistance value of the first resistor R16 is greater than the resistance value of the third resistor R15; the third resistor is further provided, and the resistance value of the first resistor R16 is 560K; the resistance value of the second resistor R14 is 15K; the resistance value of the third resistor R15 is 56K; the voltage of the first power supply U1 is 1.8V.

Further, the model of the first diode D4 is 1N 4001W; the types of the first resistor R16, the second resistor R14 and the third resistor R15 are 0402.

As will be appreciated by those skilled in the art, a normal vehicle power supply voltage of 12V/24V, when VACC is above 8V, the device will recognize that the vehicle is in an ignited state. If the VACC is below 2.5V, the device will recognize the flameout condition.

Principle of: the IO level detection module M2 is used as level input to detect and distinguish high level or low level, the module can be identified as high level when reaching 0.89V, and can be identified as low level when being lower than 0.89V.

When the input voltage of the main control module M1 reaches 8V, the cathode voltage of the 1N4001W diode is 1.69V, because the 1N4001W diode is on and off, the anode is pulled to 1V8, and the current state is just off, so when the input voltage of the main control module M1 is more than 8V and less than 30V, the state of the diode is off, the theoretical value of the anode of the diode is always pulled up to 1.723V under the actual measurement condition of 1V8, and therefore, the IO level detection module M2 is always identified as high level under the condition of automobile ignition.

Due to the voltage-current characteristic problem of the diode, when the input voltage of the VACC is between 2.5V and 8V, that is, the voltage of the cathode of the diode is between 0.53V and 1.69V, the diode is actually turned on during the period, and the voltage of the anode of the diode is increased in a certain non-linear way between 0.89V and 1.723V, so that the input detection of the IO level detection module M2 is also high.

When the input of the main control module M1 is 0V-2.5V, the diode is also conducted, but the anode of the diode is lower than 0.89V, so the IO level detection module M2 recognizes as a low level, and the state is a flameout state.

In summary, when the voltage range of the automobile is 0V-30V, the design VACC is lower than 2.5V, and the flameout is judged. Above 2.5V ignition is determined. The 2.5V threshold can also stably identify the ignition/flameout state under the condition that the main control module M1 has weak influence.

Finally, it should be noted that: the above embodiments are only for illustrating the technical solution of the present utility model, and are not limiting; although the utility model has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical scheme described in the foregoing embodiments can be modified or some technical features thereof can be replaced by equivalents; such modifications and substitutions do not depart from the spirit and scope of the technical solutions of the embodiments of the present utility model.

Claims

1. The circuit for identifying the ignition and flameout of the vehicle is characterized by comprising an IO level detection module (M2), a main control module (M1), a first resistor (R16), a first diode (D4) and a first power supply (U1); one end of the first resistor (R16) is electrically connected with the first power supply (U1), and the other end of the first resistor is electrically connected with the anode of the first diode (D4); the detection module (M2) is electrically connected with the anode of the first diode (D4); the main control module (M1) is electrically connected with the cathode of the first diode (D4).

2. The circuit for identifying vehicle ignition and extinction of claim 1, further comprising a second resistor (R14); one end of the second resistor (R14) is connected to the cathode of the first diode (D4), and the other end of the second resistor is grounded.

3. A circuit for identifying ignition and extinction of a vehicle according to claim 2, further comprising a third resistor (R15); the third resistor (R15) is connected between the cathode of the first diode (D4) and the main control module (M1).

4. A circuit for identifying ignition and extinction of a vehicle according to claim 3, characterized in that the resistance of said first resistor (R16) is greater than the resistance of said third resistor (R15); the resistance value of the third resistor (R15) is larger than the resistance value of the second resistor (R14).

5. The circuit for identifying vehicle ignition and extinction according to claim 4, characterized in that said first resistance (R16) has a resistance value of 560K; the resistance value of the second resistor (R14) is 15K; the resistance value of the third resistor (R15) is 56K; the voltage of the first power supply (U1) is 1.8V.

6. The circuit for identifying vehicle ignition and extinction of claim 5 wherein said first diode (D4) is of type 1N 4001W; the first resistor (R16), the second resistor (R14) and the third resistor (R15) are all 0402 in type.