KR20110024188A - Method for detecting on/off change for starting power in in-vehicle electronic device - Google Patents

Abstract

PURPOSE: A method for detecting an on/off change of starting power for electronic equipment in a vehicle is provided to safely and accurately supply battery power to electronic equipment for a vehicle by recognizing an on/off change of starting power. CONSTITUTION: A method for detecting an on/off change of starting power for electronic equipment in a vehicle is as follows. When the starting power of a vehicle is turned off, a battery voltage value is measured. A first condition is determined whether a difference between current battery voltage values is more than a starting power recognition critical value(S100). A second condition is determined whether a reed signal is periodically detected for a pre-determined time(S110). A third condition is determined whether communication with electronic equipment is normally operated(S120).

Description

METHOD FOR DETECTING ON / OFF CHANGE FOR STARTING POWER IN IN-VEHICLE ELECTRONIC DEVICE}

The present invention relates to a method for detecting an on / off change of a vehicle starting power supply in an electronic device for a vehicle connected to an on board diagnostics (OBD) terminal coupled to an electronic control unit (ECU) of a vehicle. More specifically, the vehicle starting power on / off change of the vehicle starting power by performing the starting power on / off recognition threshold value, periodic detection of the lead signal, and the condition check for normal communication with the electronic controller in the automotive electronic device. It relates to a method for providing a service that can determine the.

As a representative automotive electronic device that is connected to a vehicle and provides additional functions to a driver, a navigation and a vehicle black box can be considered. Conventional navigation and vehicle black boxes are structured to receive power through a cigar jack of a vehicle.

Cigar jack power is supplied to the car electronics through the cigar jack power through the operation of the car key, that is, the relay by the intermittent relay. However, in the case of using a cigar jack power, there is a problem in that damage to the power circuit of the navigation or vehicle black box due to severe power fluctuations at the time of driving or starting the car.

In addition, in the case of a vehicle black box may be a case where the power supplied through the cigar jack is cut off when the ignition is turned off in the event of an accident. In order to prevent this, there is also a problem that the cost is increased by installing a separate additional battery inside the vehicle black box.

An electronic control unit (ECU) mounted on a vehicle is used as a term for a device that controls a state of an engine, an automatic transmission, an ABS, or the like by a computer. Most recently released cars include an electronic control device, the electronic control device is a configuration that controls the overall function of the vehicle has been increasing in recent years its importance.

The power supply for the navigation or vehicle black box can also be provided via an ON Board Diagnostics (OBD) terminal coupled to the electronic control unit. As such, by supplying battery power through the OBD terminal, there is a need for a method and system that can supply more stable power and recognize on / off of more accurate starting power.

The present invention has been made to solve the above problems, by recognizing the on / off change of the normal start-up power in the vehicle electronics coupled to the electronic control device through the OBD terminal, compared to the battery through the jack It is an object of the present invention to provide a method in which a power source can be provided to a vehicle electronic device more safely and accurately.

In addition, the present invention is a method that can detect the change in the normal start power by setting the start power on / off recognition threshold value, the detection of the lead signal and whether or not normal communication with the electronic control device by setting the start change condition, etc. To provide another purpose.

In addition, the present invention is to detect the case that is not the normal start-off and continue to supply the battery power to the automotive electronics, thereby turning on / off the vehicle starting power in the automotive electronics that do not need to install an additional battery to the automotive electronics Another object is to provide a method for detecting off changes.

In addition, the present invention is not connected to the electronic device for automobiles using a cigar jack, but by connecting the power using the OBD terminal located in the lower part of the driver's seat handle portion, the automobile electronics can be more neatly organized in the vehicle Another object is to provide a method for detecting on / off changes in the car starting power in the device.

In order to achieve the above objects, according to an aspect of the present invention, the on / off of the vehicle starting power in the vehicle electronics connected to the OBD (ON Board Diagnostics) terminal coupled to the electronic control unit (ECU) of the vehicle ( On, Off) A method for detecting a change, the first step of determining a first condition whether the difference between the battery voltage value and the current battery voltage value in the vehicle starting power off state is greater than the starting power on recognition threshold value ; A second step of determining a second condition that is whether a read signal is periodically detected for a predetermined time; A third step of determining a third condition which is whether communication with the electronic control apparatus is normally performed; And a fourth step of determining whether at least one preset condition among the first to third conditions is satisfied, and determining that the vehicle starting power is changed from the off state to the on state when the preset condition is satisfied. In a vehicle electronic device, it is possible to provide a method for detecting a change in on / off of a vehicle starting power source.

Here, the electronic device for a vehicle may be a vehicle black box or a vehicle navigation device that can be connected to an OBD terminal coupled to an electronic control unit (ECU).

According to another aspect of the present invention, detecting the on / off change of the vehicle starting power in the vehicle electronics connected to the OBD (ON Board Diagnostics) terminal coupled to the electronic control unit (ECU) of the vehicle A method, comprising: a first step of determining a first condition whether a difference between a battery voltage value in a vehicle starting power on state and a current battery voltage value is equal to or greater than a starting power off recognition threshold value; A second step of determining a second condition that is whether a read signal is periodically detected for a predetermined time; A third step of determining a third condition, which is whether communication with the electronic controller is not performed for a predetermined period of time; And a fourth step of determining whether at least one preset condition among the first to third conditions is satisfied, and determining that the vehicle starting power is changed from the on state to the off state when the preset condition is satisfied. In a vehicle electronic device, it is possible to provide a method for detecting a change in on / off of a vehicle starting power source.

Here, the electronic device for a vehicle may be a vehicle black box or a vehicle navigation device that can be connected to an OBD terminal coupled to an electronic control unit (ECU).

According to the present invention, by recognizing the on / off change of the normal start-up power in the vehicle electronics combined with the electronic control device through the OBD terminal, the battery power is safer and more accurate than the connection through the cigar jack It can provide a method that can be provided by.

Further, according to the present invention, it is possible to detect a change in the normal starting power by setting the starting power on / off recognition threshold value, the detection of the lead signal, and whether or not normal communication with the electronic controller is set as the starting change condition. It can provide a way to.

In addition, according to the present invention, by detecting the case that is not the normal start-off, the battery power is continuously supplied to the vehicle electronics, thereby eliminating the need to attach additional batteries to the vehicle electronics, It is possible to provide a method for detecting an on / off change.

In addition, according to the present invention, by connecting the power using the OBD terminal located in the lower part of the driver's seat handle portion rather than connecting the car electronics using a cigar jack, the car can be more neatly organized in the vehicle It is possible to provide a method for detecting an on / off change of a vehicle starting power source in a consumer electronic device.

Hereinafter, exemplary embodiments of the present invention will be described in detail with reference to the accompanying drawings.

1 is a view for explaining the overall configuration for providing a method for detecting a change in the on / off of the vehicle starting power in the electronic device for automobiles according to the present invention.

Referring to FIG. 1, a configuration for providing a method for detecting an on / off change of a vehicle starting power source in an electronic device for a vehicle according to the present invention includes an electronic control unit 10 included in an automobile (Electronic Control Unit (ECU)). )), The OBD (ON Board Diagnostics) terminal 20 and the automotive electronic device 30.

The electronic control device 10 is a device for controlling the state of the engine, automatic transmission, ABS, etc. of the vehicle by a computer, and is coupled with the electronic device 30 for the vehicle through the OBD terminal 20. In the electronic control apparatus 10 according to the present invention, the automotive electronic device 30 is powered on by the vehicle electronic device 30 by analyzing the battery voltage value, detecting the lead signal, and providing communication information with the vehicle electronic device 30. To determine whether it has changed from off to on. Since the electronic controller 10 exists as a conventional general configuration included in an automobile, detailed description thereof will be omitted.

The OBD terminal 20 is a means for connecting the electronic controller 10 and the vehicle electronic device 30. In general, the OBD terminal located under the steering wheel of the vehicle is a means for combining with the inspection apparatus used when inspecting the current state of the vehicle in a car center. The vehicle electronics in the present invention is configured to have a connection jack compatible with the OBD terminal for communicating with the electronic control device 10.

Automotive electronic device 30 is defined as a term meaning a device that is attached to the vehicle to provide additional information to the car user. For example, a vehicle black box having a photographing function for grasping a situation at the time of an accident of a vehicle, a navigation for providing road guidance information to a user of a vehicle, and the like may exist as the vehicle electronic device 30. In addition, it will of course be able to include all the electronic devices that can be used in connection with the vehicle.

Such automotive electronics 30 require a power source for operation of the operation. In the related art, a method of being connected to a cigar jack power of a vehicle and receiving battery power was used. However, the automotive electronic device 30 according to the present invention is not connected to the cigarette lighter and is supplied with battery power, but is supplied with battery power by being connected to the electronic controller 10 through the OBD terminal 20. One of the main configurations. The vehicle electronic device 30 determines whether the vehicle starting power is turned on or off by using the battery voltage value information, lead signal information, and communication performance information from the electronic controller 10 connected through the OBD terminal 20. Done.

2 is a flow chart illustrating a method for detecting that the vehicle starting power is changed from the off state to the on state in the electronic device for a vehicle according to the present invention.

) 이상인지 여부인 제1 조건을 판단한다(S100). 자동차 시동 전원이 오프 상태에서 온 상태로 변화하는 경우, 즉 자동차 키에 의한 시동 온을 시도하는 경우에는 배터리 전원 값의 변화가 발생한다. 시동 전원 온 인식 임계값(

)은 자동차 시동 전원이 오프 상태에서 온 상태로 변하는 것을 판단하는 임계값으로서 존재한다. Referring to FIG. 2, first, the vehicle electronic device 30 has a difference between a battery voltage value and a current battery voltage value in a vehicle starting power-off state.

In step S100, it is determined whether the first condition is abnormal. When the vehicle starting power is changed from the off state to the on state, that is, when the vehicle starting power is attempted to be turned on by the car key, a change in the battery power value occurs. Startup power-on awareness threshold (

) Is present as a threshold for determining that the vehicle starting power source changes from the off state to the on state.

Next, the automotive electronic device 30 determines a second condition that is whether a lead signal is periodically detected for a predetermined time (S110). The read signal is a non-zero signal value and can be used as one of the conditions that there is a change in the starting power supply if the read signal is periodically detected for a predetermined time.

Next, the vehicle electronic device 30 determines a third condition that is whether communication with the electronic control apparatus 10 is normally performed (S120). In the present invention, the automotive electronic device 30 is one of the main objects to detect the start-up / off changes in the normal state. When the normal starting power is not turned on or off, for example, when an automobile accident or a failure of the electronic controller 10 occurs, communication with the electronic controller 10 is not normally performed. In this case, since the third condition is not satisfied, it may not be determined that the starting power is changed from the off state to the on state.

Next, it is determined whether at least one preset condition among the first to third conditions is satisfied (S130). When the vehicle electronic device 10 determines whether the vehicle starting power is changed from off to on, it is determined whether a predetermined specific condition among the first to third conditions is satisfied by setting to change the starting power. It can be detected.

For example, when the condition 1 and the condition 3 are satisfied, it may be set to determine that the starting power source has changed from off to on even if the condition 2 is not satisfied. In addition, for example, even if only condition 2 or condition 3 is satisfied, of course, it can be set so as to determine that the starting power source changed from OFF to ON. The setting of the condition for determining the change in the starting power source is preferably configured to be freely changed by the user according to the environment.

Finally, when at least one preset condition among the first to third conditions is satisfied, the vehicle electronic device 10 determines that the vehicle starting power is changed from the off state to the on state (S140). In this way, when it is determined that the starting power is changed from the off state to the on state, the vehicle electronic device 10 uses the battery power to drive the operation of the device. Such an electronic device 10 for a vehicle performs a function such as a vehicle black box or a vehicle navigation device, which is connected to an OBD terminal 20 coupled to the electronic controller 10 unlike the general configuration. It is configured to have a jack possible.

3 is a flow chart illustrating a method of detecting that the vehicle starting power is changed from the on state to the off state in the electronic device for a vehicle according to the present invention.

) 이상인지 여부인 제1 조건을 판단한다(S200). 자동차 시동 전원이 온 상태에서 오프 상태로 변화하는 경우, 즉 자동차 키에 의한 시동 오프를 시도하는 경우에는 배터리 전원 값의 변화가 발생한다. 시동 전원 오프 인식 임계값(

)은 자동차 시동 전원이 온 상태에서 오프 상태로 변하는 것을 판단하는 임계값으로서 존재한다. Referring to FIG. 3, first, the electronic device 30 for a vehicle includes a difference between a battery voltage value and a current battery voltage value in a vehicle starting power on state.

The first condition is determined whether or not (S200). When the vehicle starting power is changed from the on state to the off state, that is, when the vehicle is turned off by the car key, a change in the battery power value occurs. Startup power off detection threshold (

) Is present as a threshold for determining that the vehicle starting power source turns from the on state to the off state.

Next, the automotive electronic device 30 determines a second condition whether the lead signal is periodically detected for a predetermined time (S210). The read signal is a non-zero signal value and can be used as one of the conditions that there is a change in the starting power supply if the read signal is periodically detected for a predetermined time.

Next, the vehicle electronic device 30 determines a third condition that is whether communication with the electronic control apparatus 10 is normally performed (S120). When the starting power source changes from the on state to the off state normally, the communication of the electronic control apparatus 10 is cut off. In other words, the communication with the electronic controller 10 is set as a change requirement for starting power-off.

Next, it is determined whether at least one preset condition among the first to third conditions is satisfied (S230). When the vehicle electronic device 10 determines whether the vehicle starting power is changed from on to off, it is determined whether the predetermined specific condition among the first to third conditions is satisfied by setting to change the starting power. It can be detected.

For example, when the first condition and the third condition are satisfied, it may be set to determine that the starting power source is changed from on to off even if the second condition is not satisfied. In addition, when only the first condition or the second condition is satisfied, it may be set to determine that the starting power is changed from on to off even if other conditions are not satisfied, and only when all of the first to third conditions are satisfied. Of course, it can be set to determine the change in the starting power source. When it is determined that the conditions set as described above are satisfied, the vehicle electronic device 30 may recognize that the vehicle starting is turned off and stop driving of the electronic device.

FIG. 4 is a view illustrating a state of change of battery voltage according to time when a vehicle starting power is detected from an on / off state to an off / on state in a vehicle electronic device according to the present invention.

Referring to FIG. 4, the voltage change of the battery when the vehicle starting power is changed from the off state to the on state (t1 to t2) and the change of the battery voltage when the on state is changed from the on state to the off state (t2 to t3) are shown in a graph form. .

는 시동 오프 상태에서의 배터리 전압값,

은 시동 온 후 정상상태에서의 배터리 전압값,

및

는 시동 오프 상태에서 시동 온 상태로 변하는 경우 나타나는 배터리 전압값의 최소/최대값,

은 시동 오프에서 시동 온으로 상태 변화가 시작되었다는 것을 판단하는 시동 전원 온 인식 임계값,

은 시동 온에서 시동 오프로 상태 변화가 시작되었다는 것을 판단하는 시동 전원 오프 인식 임계값을 의미하는 용어로서 정의된다.

Is the battery voltage value at start-up,

Is the battery voltage at steady state after start-up,

And

Is the minimum / maximum value of the battery voltage value,

Is the startup power on awareness threshold, which determines that a state change has started from startup off to startup on,

Is defined as a term meaning a startup power off recognition threshold that determines that a state change has started from startup on to startup off.

값까지 내려갔다가

값까지 상승한 후 점차 안정적인

값까지 내려옴으로써 정상상태의 배터리 전압값이 유지된다. Time 0 to time t1 represent a state in which the vehicle starting power is turned off. Time t1 to time t2 represent the change of the battery voltage value at the time of turning on a starting power supply using a car key etc. In other words, the battery voltage value is

Down to the price

Gradually stable after rising to the value

By lowering the value, the normal battery voltage value is maintained.

로부터 일정값 이상 차이가 나는 시동 전원 온 인식 임계값

만큼의 전압값 차이를 인식하여 시동 전원 오프에서 온 상태로의 변화를 판단하는 하나의 조건으로 사용한다. In this case, as described above with reference to FIG. 2, the vehicle electronic device 30 has a battery voltage value in a start-off state.

Power-on detection threshold that differs from

It recognizes the difference in voltage value as much as and uses it as a condition to judge the change from starting power off to on state.

으로부터 일정값 이상 차이가 나는 시동 전원 오프 인식 임계값

만큼의 전압값 차이를 인식하여 시동 전원 온 상태에서 오프 상태로의 변화를 판단하는 하나의 조건으로 사용한다. The time t2-time t3 show the change of the battery voltage value in the case where it changes from a state which starts power supply to on state. In this case, as described above with reference to FIG. 3, the vehicle electronic device 30 has a battery voltage value in a startup on state.

Power off detection threshold that deviates by more than a certain value from

It recognizes the difference in voltage value and uses it as a condition for judging the change from starting power on state to off state.

외에 도 2에서 상술 한 리드 시그널의 주기적인 검출 여부 및 전자제어장치(10)의 정상적인 통신 여부 등을 조건으로 하여 시동 변화를 판단할 수 있음은 앞서 살펴본 바와 같다. The above starting power on recognition threshold as a condition for determining that the vehicle starting power is normally changed from the off state to the on state.

In addition, as described above, the start change may be determined based on the periodic detection of the lead signal described above with reference to FIG. 2 and the normal communication of the electronic controller 10.

외에 도 3에서 상술한 리드 시그널의 주기적인 검출 여부 및 전자제어장치(10)와의 통신이 정상적으로 이루어지지 않는지 여부 등을 조건으로 하여 시동 변화를 판단할 수도 있다는 것 역시 앞서 살펴본 바와 같다. Further, the starting power off recognition threshold value is a condition for determining that the vehicle starting power is normally changed from the on state to the off state.

In addition, as described above, the start change may be determined based on whether the lead signal described above with reference to FIG. 3 is periodically detected and whether communication with the electronic controller 10 is not normally performed.

In the above, the configuration of the present invention with reference to the preferred embodiment of the present invention, but the present invention is not limited to the above embodiment, of course, it is within the scope of the present invention as grasped by the appended claims and drawings Various modifications, modifications, and improvements are possible in the art to those skilled in the art.

1 is a view for explaining the overall configuration for providing a method for detecting a change in the on / off of the vehicle starting power in the electronic device for automobiles according to the present invention.

2 is a flow chart illustrating a method for detecting that the vehicle starting power is changed from the off state to the on state in the electronic device for a vehicle according to the present invention.

3 is a flow chart illustrating a method of detecting that the vehicle starting power is changed from the on state to the off state in the electronic device for a vehicle according to the present invention.

FIG. 4 is a view illustrating a state of change of battery voltage according to time when a vehicle starting power is detected from an on / off state to an off / on state in a vehicle electronic device according to the present invention.

Claims (4)

In the method of detecting the on / off change of the starting power of the car in the vehicle electronics connected to the OBD (ON Board Diagnostics) terminal coupled to the electronic control unit (ECU) of the vehicle, A first step of determining whether a difference between the battery voltage value and the current battery voltage value in the vehicle starting power off state is equal to or greater than the starting power on recognition threshold value; A second step of determining a second condition that is whether a read signal is periodically detected for a predetermined time; A third step of determining a third condition which is whether communication with the electronic control apparatus is normally performed; And A fourth step of determining whether at least one preset condition among the first to third conditions is satisfied, and determining that the vehicle starting power is changed from the off state to the on state when the preset condition is satisfied Method for detecting a change in the on / off (On, Off) of the vehicle starting power in the electronic device for cars comprising a. The method of claim 1, The vehicle electronics may be a vehicle black box or a vehicle navigation system which may be connected to an OBD terminal coupled to an electronic control unit (ECU). How to detect. In the method of detecting the on / off change of the starting power of the car in the vehicle electronics connected to the OBD (ON Board Diagnostics) terminal coupled to the electronic control unit (ECU) of the vehicle, A first step of determining whether the difference between the battery voltage value and the current battery voltage value in the vehicle starting power on state is equal to or greater than the starting power off recognition threshold value; A second step of determining a second condition that is whether a read signal is periodically detected for a predetermined time; A third step of determining a third condition, which is whether communication with the electronic controller is not performed for a predetermined period of time; And A fourth step of determining whether at least one preset condition among the first to third conditions is satisfied, and determining that the vehicle starting power is changed from the on state to the off state when the preset condition is satisfied Method for detecting a change in the on / off (On, Off) of the vehicle starting power in the electronic device for cars comprising a. The method of claim 3, The vehicle electronics may be a vehicle black box or a vehicle navigation system which may be connected to an OBD terminal coupled to an electronic control unit (ECU). How to detect.

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