KR20200005800A - Power control device for vehicle black box with security function - Google Patents

Abstract

The present invention relates to a power control device of a black box for a vehicle having a security function and, more specifically, to a method for controlling power of a black box for a vehicle installed in a vehicle entering a security area. The power control device for controlling power supplied to a black box for a vehicle comprises: a power supply unit to supply power received from a vehicle or a battery to a black box for a vehicle; a transceiving unit to receive a security mode setting signal or a security mode cancelation signal from the outside; a control unit to lower or raise voltage in accordance with a power control algorithm which controls the voltage of the power supplied to the black box for a vehicle by the power supply unit in accordance with the security mode setting signal or the security mode cancelation signal received via the transceiving unit, and recognize a voltage change of the power supply unit; and a memory unit storing the power control algorithm which controls the power supplied to the black box for a vehicle by the power supply unit.

Description

Power control device for vehicle black box with security function

The present invention relates to a power control apparatus for a vehicle black box having a security function, and more particularly, to a method for controlling a power supply of a vehicle black box installed in a vehicle entering a security area.

The black box was originally developed for an aircraft, and serves to record the state and communication contents of the aircraft's altitude, route, speed, engine status, and the like. In the event of an aircraft accident, a black box can be collected and analyzed to help determine the exact situation of the aircraft. Today, black boxes are installed in vehicles as well as aircraft. Car black boxes are also called 'EDR (Event Data Recorder)', and many camera type products. It is mainly installed near the room mirror inside the vehicle or on the dashboard. It records the video in front of the vehicle and records it as a video, and is mainly used to cover sisbibi in the event of a traffic accident.

Depending on the product, two or more cameras may be installed to photograph not only the front, but also the rear and the side at the same time.In the case of a vehicle such as a taxi or a bus used by an unspecified number, a black box that records the inside of the vehicle while recording voice do. In addition, there are products that always shoot during driving regardless of a collision, a product that detects a sudden movement of a vehicle and shoots only a moment of collision, or a product that works only when parking. There are many. There's also an all-in-one black box with navigation and high-pass features.

In addition to a separate black box for a vehicle, a car black box may be mounted from the beginning by a car manufacturer. At this time, whether the pedal (accelerator, brake) or steering wheel (handle) is operated, the speed of the vehicle, the state of the seat belt, etc. are recorded, so that the accident situation can be investigated more systematically and accurately. This type of black box is widely used in the United States and Europe, where car black boxes have a high penetration rate.

However, when a vehicle with a vehicle black box enters a military security facility or an industrial security facility, there is a need to prevent a vehicle black box with a built-in camera in areas requiring confidential information or military security.

Therefore, there is a problem in that it is not possible to check, recover or return the power of the black box for the vehicle that enters and exits each time.

Korean Registered Patent No. 10-1515582 (Invention name: Facility security management device and method using short-range communication) Korean Registered Patent No. 10-1234347 (Name of the invention: Method of providing security-enhanced vehicle black box service based on watermarking technology)

The problem to be solved by the present invention is to propose a method for controlling the power of the vehicle black box installed in the vehicle entering the security area.

Another object of the present invention is to propose a method of limiting image capturing and storage of a camera built in a black box in a secure area.

Another problem to be solved by the present invention is to propose a method for minimizing the electric shock applied to the black box due to forced power off.

Another problem to be solved by the present invention is to propose a method for notifying to the outside when the power line of the black box is forcibly removed.

To this end, a power control device for controlling power supplied to a vehicle black box of the present invention includes a power supply unit for supplying power supplied from a vehicle or a battery to the vehicle black box; A transceiver for receiving a security mode setting signal or a release signal from the outside; Pressure reduction or boosting according to a power control algorithm for controlling the voltage of the power supplied from the power supply unit to the vehicle black box according to the security mode setting signal or the security mode release signal received through the transmission and reception unit, and recognizes the voltage change of the power supply unit. A control unit; And a memory unit in which a power control algorithm for controlling power supplied from the controller to the vehicle black box is stored.

The power control device for controlling the power supplied to the vehicle black box according to the present invention controls the power of the vehicle black box installed in the vehicle entering the security area, and in particular in the security area video recording and storage of the camera built in the black box By restricting this, it is possible to prevent the outflow of the image of the complementary region to the outside.

In addition, it is possible to minimize the electric shock applied to the vehicle black box by not automatically forcibly shutting off the power supplied to the vehicle black box, but automatically shutting off the power by recognizing the vehicle black box as a low voltage state. In addition, when power is forcibly removed from the vehicle black box, by notifying the outside, the manager may monitor the power supply state of the vehicle black box.

1 is a view showing the configuration of a vehicle black box according to an embodiment of the present invention.
2 is a block diagram showing a configuration of a power supply control apparatus according to an embodiment of the present invention.
3 is a flowchart illustrating an operation of a power control apparatus according to an embodiment of the present invention.
4 illustrates a nonpolar rectifying circuit according to an embodiment of the present invention.
5 illustrates an insider power control apparatus according to an embodiment of the present invention.
6 illustrates an external power supply control apparatus according to an embodiment of the present invention.

The foregoing and further aspects of the present invention will become more apparent through the preferred embodiments described with reference to the accompanying drawings. Hereinafter will be described in detail to enable those skilled in the art to easily understand and reproduce through this embodiment of the present invention.

1 is a view showing the configuration of a vehicle black box according to an embodiment of the present invention. Hereinafter, the configuration of the vehicle black box according to an embodiment of the present invention will be described in detail with reference to FIG. 1.

Referring to FIG. 1, a vehicle black box includes an image information generator 110, a vehicle driving state detector 120, a speed calculator 130, an operation mode determiner 140, a controller 150, and a storage 160. ) And the communication unit 170.

The image information generator 110 captures an image of the front or rear of the vehicle from the camera sensor and generates image information accordingly. Here, the camera sensor may be mounted in the vehicle black box 100 according to an embodiment of the present invention, and in some embodiments, may be located inside the vehicle.

According to an embodiment, the image information generating unit 110 may include a front camera sensor photographing the front of the vehicle, a rear camera sensor photographing the rear of the vehicle, and a side camera sensor photographing the left and right directions of the vehicle, respectively. Image capturing may be performed in all directions, and image information may be generated accordingly, and types, numbers, and positions of camera sensors are not limited.

The camera sensor may include a fixed front camera sensor or a rear camera sensor cabled together with the front camera sensor, or both a side camera sensor cabled together with the front camera sensor and the rear camera sensor according to a function or a purpose. Can be.

In addition, the image information generating unit 110 may rewritable image information photographed from a camera sensor including RAM, EEPROM, SD memory, NAND memory, SSD, hard disk, and flash memory. A memory module may be stored in at least one of the storage media, and the memory module may convert and store the captured image information into a set resolution and size, and include data including the shooting position and time information of the vehicle. You can also save it.

According to an exemplary embodiment, the memory module may include an event generation storage module for separately storing a captured image for a predetermined time according to an event occurrence from the controller 150.

The image information generator 110 may generate image information using at least one of a radar, a rider, and a camera sensor, and is not limited to the type and number of devices.

The vehicle driving state sensor 120 detects a dynamic force of any one of acceleration, vibration, and impact of the vehicle from the acceleration sensor, and measures the acceleration information of the vehicle.

For example, the vehicle driving state detector 120 may measure acceleration information including slope information of the vehicle from the acceleration sensor. Here, the acceleration sensor may be mounted in the intelligent vehicle black box 100 according to an embodiment of the present invention, and depending on the embodiment may be located inside the vehicle, but the type, number and location of the acceleration sensor are not limited. Do not. In addition, the acceleration sensor is a three-axis or more that can calculate the acceleration of all the X, Y, Z axis relative to the vehicle It may be an acceleration sensor.

According to an exemplary embodiment, the vehicle driving state detecting unit 120 may detect the longitudinal acceleration and the lateral acceleration of the vehicle by calculating the acceleration on the X, Y, and Z axes using the acceleration sensor. In addition to the acceleration sensor, the present invention can be operated in more than nine axes including a gyro sensor, a geomagnetic sensor, and a temperature sensor.

The speed calculator 130 calculates speed information of the vehicle based on the measured acceleration information. The speed calculator 130 may calculate a rate of change of the acceleration of the vehicle based on the measured change in speed, determine a state of movement of the vehicle based on the calculated change rate, and calculate speed information of the vehicle indicating the speed. .

For example, the speed calculator 130 may calculate the speed information of the vehicle by integrating the acceleration information including the tilt information of the vehicle.

The speed calculator 130 may measure the measured acceleration information for a predetermined time and measure the standard deviation A of the acceleration change rate of the vehicle indicating the acceleration change, the current acceleration information, and the immediately previous acceleration information.

In addition, according to an embodiment, the speed calculator 130 may accelerate or decelerate the vehicle by determining the speed of the vehicle at a constant speed if the deviation of the current acceleration information is greater than the measured previous acceleration information. And speed information of the vehicle including the constant speed state.

Here, the speed calculator 130 checks whether the measured standard deviation A of the acceleration change rate is smaller than the preset acceleration threshold, and if the speed is smaller than the preset acceleration threshold, the speed of the vehicle is determined in the stop mode, that is, the speed and speed of the vehicle. All accelerations in the advancing direction can be set to "0".

In addition, the speed calculator 130 checks whether the absolute value J between the current acceleration information and the immediately previous acceleration information is greater than the threshold JTH of the preset acceleration difference value, if it is not smaller than the preset acceleration threshold value. If it is larger than the threshold JTH of the preset acceleration difference value, the speed information of the vehicle may be calculated from the acceleration change rate of the vehicle.

Here, the threshold JTH of the preset acceleration difference value may mean a set value for determining whether the vehicle is slow. Therefore, the speed calculator 130 may calculate speed information of a predetermined slow speed or more by comparing a predetermined speed designated as a slow speed with an absolute acceleration J of the current acceleration information of the vehicle and the immediately preceding acceleration information.

In addition, according to the exemplary embodiment, the speed calculator 130 may include a difference between the first longitudinal acceleration and the second longitudinal acceleration measured from the first acceleration sensor and the second acceleration sensor of the vehicle driving state detection unit 120, and The rotation angle of the vehicle can be inferred from the distance value between the first acceleration sensor and the second acceleration sensor, and the speed information with high accuracy can be calculated based on the rotation angle of the inferred vehicle and the acceleration change rate according to the measured acceleration change. It may be.

The operation mode determination unit 140 determines the operation mode of the vehicle by using the calculated speed information and the generated image information. The operation mode determination unit 140 may determine at least one operation mode among the emergency braking, lane departure, forward collision, and preceding vehicle departure using the calculated speed information and the generated image information.

The storage unit 160 is divided into a temporary storage unit and a permanent storage unit, the temporary storage unit stores the image taken from the camera sensor for a set time, the permanent storage unit stores the image that requires permanent storage of the image stored in the temporary storage unit do. The image requiring permanent storage stores an image of a time period set before and after a corresponding time point when the acceleration, vibration, and impact of the vehicle measured by the vehicle driving state detecting unit 120 are greater than or equal to a set threshold.

The communication unit 170 communicates with an external device, and particularly, receives a security mode setting signal and a security mode release signal in connection with the present invention. The security mode setting signal is a signal for requesting to set the mode of the vehicle black box to the security mode, and the security mode release signal is a signal for canceling the set security mode. The security mode will be described later.

The controller 150 controls the operation of the vehicle black box 100 according to the present invention. That is, the controller sets the mode of the vehicle black box 100 to the security mode according to the security mode setting signal provided from the outside, and sets the mode of the vehicle black box 100 to the general mode according to the security mode release signal.

In addition, the vehicle black box according to the present invention may include a display unit and a power supply unit. The display unit displays the current state of the vehicle black box or an image captured by the camera sensor. In addition, the display unit displays whether the mode of the vehicle black box is in a security mode or a security mode release state, and displays information for receiving necessary information from the driver. The display unit may not display an image captured by the camera sensor in the security mode. In addition, the display unit may include a light emitting device such as an LED lamp, and may display necessary information using the light emitting device.

The power supply unit may receive power from an external separate component or may be built in. The power supply unit supplies power required for driving the vehicle black box, and in connection with the present invention, the power supply unit may block the power supply provided to the camera sensor in the security mode state as required by the controller.

2 illustrates a configuration of a power control device connected to a vehicle black box according to an embodiment of the present invention. Hereinafter, a configuration of a power control device connected to a vehicle black box according to an embodiment of the present invention will be described in detail with reference to FIG. 2.

According to FIG. 2, the power supply control device includes a power supply unit, a power control unit, a main control unit, a memory unit, and a transmission / reception unit. Of course, in addition to the above-described configuration, other configuration may be included in the power control device proposed by the present invention.

In addition, according to Figure 2, the power control device 200 is connected to the vehicle black box 100, the vehicle power (battery) 300, in addition to the external server / terminal 400. The external server / terminal 400 provides a security mode setting signal or a security mode release signal to the power control device 200.

As described above, when the vehicle enters the security area, the external server / terminal 400 provides a security mode setting signal to the power control device 200. When the vehicle enters the secure area, the external server / terminal 400 provides a security mode release signal to the power control device 200.

Hereinafter, the operation of each component constituting the power control device will be described in detail. The power supply unit 210 is connected to the power of the vehicle and receives power from the power of the vehicle. Of course, the power supply unit 210 may receive power from the built-in battery. The power supply unit 210 supplies an external or built-in power to the vehicle black box 100.

The power control unit 220 controls the power supplied to the vehicle black box 100. When the power controller 220 receives the security mode setting signal from the external server / terminal 400, the power controller 220 controls the power supplied to the vehicle black box 100 according to the set power control algorithm. A method of controlling the power supplied from the power control unit 220 to the vehicle black box 100 will be described later.

The memory unit 230 stores a security state, a security release state, security area related information, and information for recognizing a specific state. In addition, the memory unit 230 stores a program for driving the power control device. The memory 230 stores a power control algorithm for controlling power supplied to the vehicle black box.

The transceiver 240 receives a security mode setting signal from the external server / terminal 400 or receives a security mode release signal. The transceiver 240 may transmit a response signal indicating that the security mode setting signal or the security mode release signal is normally received to the external server / terminal 400. As such, by transmitting the response signal to the external server / terminal 400 through the transmission / reception unit 240, the external server / terminal 400 receives the security mode setting signal or the security mode release signal normally. It can be recognized that.

In detail, the transceiver 240 receives the security mode setting signal from the external server / terminal 400 when entering the secure area, and secures the external server / terminal 400 when entering the secure area. Receive the mode release signal.

The main controller 250 controls the overall operation of the power control device according to the information on the power status display, security control signal, power algorithm driving, black box power line departure recognition of the vehicle black box. In connection with the present invention, the main control unit 250 and the power control unit 220 may be configured as one as necessary. When the security mode setting signal is received through the transceiver 220, the main controller 250 instructs the power controller 220 to control power supplied to the vehicle black box according to a power control algorithm. When the security mode release signal is received through the transceiver 240, the main controller 250 controls the power controller 220 to control the power supplied to the vehicle black box according to a power control algorithm.

The main controller 250 monitors whether the power line of the vehicle black box 100 is removed, and stores information on this or warns the user if necessary. In detail, the main controller 250 removes the power line of the vehicle black box 100, stores information about the power line, and transmits a warning sound to the outside. The main controller 250 monitors whether the power line of the vehicle black box 100 is removed while the vehicle is turned on. Whether or not the power line of the vehicle black box 100 is removed may be monitored using the presence or absence of a current supplied to the vehicle black box. In addition, it is possible to monitor whether the vehicle black box is disconnected from the power line in various ways.

In other words, it includes a locking means for connecting the input terminal supplied with power from the vehicle, and locking it, and the main control unit controls the locking means, and can check whether it is normally locked.

3 is a flowchart illustrating an operation of a power control apparatus according to an embodiment of the present invention. Hereinafter, the operation of the power control apparatus according to an embodiment of the present invention will be described in detail with reference to FIG. 3.

In step S300 the car black box is driven.

In step S305 enters the standby state.

In step S310 the main controller checks the lock (locking) state of the power cable. If the power cable is locked, the main controller moves to step S320. If the power cable is not locked, the main controller moves to step S315 and outputs a warning signal to the outside using a sound or an LED.

In operation S320, the main controller monitors whether a security mode setting signal is received through the transceiver. When the security mode setting signal is received, the main controller moves to step S325, and if the security mode setting signal is not received, moves to step S305 to monitor whether the security mode setting signal is received.

In step S325, the main control unit instructs the power control unit to control the power supplied to the vehicle black box.

In step S330 the power control unit controls the power supplied to the vehicle black box according to the power control algorithm stored in the memory unit. Hereinafter, a method of controlling the power supplied to the vehicle black box according to the power control algorithm in the power control unit will be described in detail.

The power control unit supplies power to the vehicle black box at the first voltage. The power control unit checks whether the power of the vehicle black box supplied with the first voltage is turned off. In general, an electric device including a vehicle black box is automatically turned off because the internal circuit protection and driving are impossible when the voltage supplied from the outside is a low voltage. That is, the vehicle black box is automatically turned off not only when power is supplied from the outside but also when it is supplied at a low voltage. In this case, when the power of the vehicle black box supplied from the outside is forcibly cut off, the parts embedded in the vehicle black box are shocked, which may cause a failure of the vehicle black box if used repeatedly. Therefore, the present invention proposes a method of turning off the power of the vehicle black box by receiving power from a low voltage state in the vehicle black box rather than forcibly cutting off the power supplied to the vehicle black box. In addition, the voltage that the vehicle black box recognizes as a low voltage state is different for every vehicle black box model. Accordingly, the present invention proposes a method of sequentially lowering a voltage from a relatively high voltage, and the first voltage is a relatively high voltage.

The power controller determines whether the power of the vehicle black box is turned off. If the power of the vehicle black box is not turned off, the power control unit supplies a second voltage that is relatively lower than the first voltage to the vehicle black box. The power controller determines whether the power of the vehicle black box is turned off. As described above, the power control unit proposed by the present invention sequentially drops the voltage of the power supplied to the vehicle black box until the vehicle black box is turned off.

In operation S335, the main controller monitors whether the security mode release signal is received through the transceiver. When the security mode release signal is received, the main controller moves to step S340, and if the security mode setting signal is not received, moves to step S335 to monitor whether the security mode release signal is received.

In step S340, the main control unit instructs the power control unit to control the power supplied to the vehicle black box. Accordingly, the power control unit supplies power for driving the vehicle black box to the vehicle black box in step S345.

The method of supplying power to the power control device includes a method of connecting a separate power line to the power control device and a method of connecting using a power terminal of an existing vehicle black box. Among these, the method of using the power terminal of the existing vehicle black box has a problem that the power terminal is different for each model of the existing vehicle black box, and the power connection method is also different. Therefore, there is a need for a method of commonizing (generalizing) a different power supply method for each model of an existing vehicle black box.

Hereinafter, a method of supplying power to the power control device will be described in detail. The power control device is divided into the insider used at all times and the outsider used when necessary, and the outsider supplies the power of the vehicle to the power control device, and supplies the power to the vehicle black box via the power control device. Supply power. In contrast, the insider supplies the vehicle's power to the power controller and at the same time supplies the vehicle's black box.

The insider supplies the vehicle's power to the vehicle black box, while the outsider supplies the vehicle's power to the power controller. That is, the power of the existing vehicle black box is connected to the input terminal of the power controller, and the output terminal of the power controller and the input terminal of the vehicle black box are connected.

Therefore, the output terminal of the existing vehicle black box and the input terminal of the power control device should be the same. Since the output terminals of the existing vehicle black box are different from each other, there is a problem that the output terminal of the existing vehicle black box cannot be used as it is. Therefore, the present invention proposes a solution to the above problems.

Existing car black boxes use a 3-pole 3.5 mm plug and a mini USB-B type plug, and some manufacturers use micro USB plugs. In the 3.5mm plug for three poles, ACC uses the same pin depending on the type, but the G and B + pins are reversely designed like G / B + (A type for example) or B + / G (B type for example). In order to solve this problem, the present invention is designed to connect a 3.5mm plug and a mini USB-B type plug to the input terminal of the power control device, and to supply power using a nonpolar rectifying circuit. This design can solve the power supply problem of the external power supply control device and the internal power supply control control device because the voltage drop of about 0.2V is caused only by the nonpolar rectifying circuit.

4 is a circuit diagram illustrating a nonpolar rectifying circuit according to an embodiment of the present invention. Hereinafter, a configuration of a non-polar rectifying circuit according to an embodiment of the present invention will be described with reference to FIG. 4.

According to Figure 4, it can be seen that the power supplied from the vehicle is rectified by the bridge circuit. Therefore, the present invention proposes a method of designing a nonpolar rectifier circuit using a bridge circuit (or rectifier circuit). In detail, in the present invention, the ACC, whose polarity is not changed, is positioned as it is, and then, power is supplied to the power controller using the B + pin and the ground pin. Of course, when the above-described circuit is used as described above, the non-polar type power supply is possible, but the voltage drop occurs in the diode, but only a voltage drop of 0.2 V occurs.

However, since the power supply for the insider uses the power of the input terminal as the black box power and the plug of the existing vehicle, it is preferable to design the power supply of the output terminal in the same way.

In order to solve this problem, a first method of connecting an input terminal and an output terminal identically is required, and a second method of switching and connecting the same as an existing power line using a switch therebetween is required. There may be a method of connecting the power of the input terminal to the output terminal using a scheme and a relay.

5 is a diagram illustrating a power connection method of an insider power control apparatus according to an embodiment of the present invention. According to Figure 5, the power connection of the insider power control device is connected to the input and output 1: 1 and the middle part The relay controls the power supplied to the vehicle black box. The input terminal of the power control device is applied as a 3-pole 3.5mm plug or a mini USB-type plug, and the output terminal is standardized as a mini USB-B type, or composed of a 3-pole 3.5mm plug and a mini USB-B type plug. have. The power control device directly supplies the vehicle power to the vehicle black box or supplies power to the vehicle black box via a relay. The relay controls power supplied to the vehicle black box according to a control command of the power controller of the vehicle black box.

6 is a diagram illustrating a power connection method of an external power supply control apparatus according to an embodiment of the present invention. According to Figure 6, the input terminal of the power supply control device is applied to a three-pole 3.5mm plug or a mini USB type plug.

The power controller controls the power output to the outside according to the control command of the power controller. To this end, the power control unit provides a voltage level of the power output to the outside to the power control device, the power control device controls to adjust the voltage level to the power control unit.

Although the present invention has been described with reference to one embodiment shown in the drawings, this is merely exemplary, and those skilled in the art will understand that various modifications and equivalent other embodiments are possible therefrom. .

100: vehicle black box 110: image information generating unit
120: vehicle driving state detection unit 130: speed calculation unit
140: operation mode determination unit 150: control unit
160: storage unit 170: communication unit

Claims (6)

A power supply unit supplying power supplied from the vehicle or the battery to the vehicle black box;
A transceiver for receiving a security mode setting signal or a release signal from the outside;
Pressure reduction or boosting according to a power control algorithm for controlling the voltage of the power supplied from the power supply unit to the vehicle black box according to the security mode setting signal or the security mode release signal received through the transmission and reception unit, and recognizes the voltage change of the power supply unit. A control unit; And
And a memory unit storing a power control algorithm for controlling power supplied from the controller to the vehicle black box.
The method of claim 1, wherein the control unit,
A main controller instructing to control the power supplied from the power supply unit to the vehicle black box according to a security mode setting signal or a security mode release signal received through the communication unit, and recognizing a voltage change of the power supply unit;
And a power controller configured to decompress or boost the voltage of the power supplied to the vehicle black box according to an instruction of the main controller according to a power control algorithm.
The method of claim 2, wherein the power control unit,
If the vehicle black box is not turned off while the voltage is reduced in accordance with the power control algorithm,
Power control device for a vehicle black box, characterized in that the voltage is reduced again in accordance with the power control algorithm in the voltage depressurized state.
The method of claim 1,
An input terminal receiving power from the vehicle; And
Power control device for a vehicle black box, characterized in that it comprises an output terminal for supplying power to the vehicle black box.
The method of claim 4, wherein
The input terminal includes a 3-pole 3.5 mm plug type and a USB type, and is commutated connected to the 3-pole 3.5 mm plug type. Power control device for a vehicle black box, comprising a circuit.
The method of claim 1,
A structure and a locking means for connecting an input terminal supplied with power from the vehicle and locking the input terminal;
The main control unit is a power control device for a vehicle black box, characterized in that for monitoring the locking of the locking means.

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