CN102376103A - Anti-dismounting on-board unit and realization method thereof - Google Patents
Anti-dismounting on-board unit and realization method thereof Download PDFInfo
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- CN102376103A CN102376103A CN201010259019XA CN201010259019A CN102376103A CN 102376103 A CN102376103 A CN 102376103A CN 201010259019X A CN201010259019X A CN 201010259019XA CN 201010259019 A CN201010259019 A CN 201010259019A CN 102376103 A CN102376103 A CN 102376103A
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Abstract
The invention discloses an anti-dismounting on-board unit (OBU) and a realization method for the anti-dismounting OBU. The realization method for the anti-dismounting OBU comprises the following steps: setting a power control module in OBU; when the OBU is under a normal working state, controlling the power supply control module to close; according to a dismounting signal, determining that the OBU is dismounted; and after the write operation and the indication operation of the dismounting information are finished, controlling the power supply control module to be disconnected, and causing a power supply to stop supplying power to a whole plate. According to the method and the device, the situation that the dismounting information is fail to write because of unstable power supply can be avoided, and the dismounting signal is free from external interference.
Description
Technical Field
The invention relates to an equipment anti-disassembly technology, in particular to an On Board Unit (OBU) and an implementation method thereof.
Background
An Electronic Toll Collection System (ETC), also known as an Electronic Toll Collection System, is an Electronic automatic Toll Collection System for highways, bridges and tunnels, which is being developed and popularized internationally. The ETC is a full electronic toll collection system which utilizes an Automatic Vehicle Identification (AVI) technology to perform wireless data communication between a Vehicle and a toll station and processes toll collection data through a computer network so as to realize Automatic toll collection without stopping the Vehicle.
ETC is mainly composed of two parts, namely Road-Side Units (RSU) and OBU. The RSU is also called a road side unit, an electronic tag reader/writer, a road side read/write antenna, or an ETC antenna, and is composed of a microwave antenna and a read/write controller. The RSU is typically mounted on a portal of a toll road or on a post of a toll island for communication with an OBU mounted on a passing vehicle. The OBU is also called a vehicle-mounted unit or an electronic tag, is a mobile identification device with a microwave communication function and an information storage function, and is installed inside a vehicle, for example: and on the windshield or the instrument desk, information exchange with the RSU is carried out through a special short-range communication technology.
There is the one-to-one relation between OBU and the vehicle, if the user removes the OBU privately, will influence highway administrative agency to traffic flow's statistics work etc. so the OBU need possess the anti-disassembly function.
Present OBU utilizes forms such as viscose to realize anti-disassembly, promptly: when the OBU is detached privately, the adhesive can damage an internal circuit of the OBU, the original OBU cannot be used again due to damage, and only a new OBU can be installed again; in addition, there are also non-destructive disassembly prevention methods in the prior art, such as: the OBU realizes the disassembly prevention through a direct power-off method, and specifically comprises the following steps: when the OBU is dismantled, the micro-gap switch is flicked, and whole veneer outage continues the power supply after the micro-gap switch flicks through the inside large capacity electric capacity that sets up, and after the micro-gap switch is flicked, the OBU need write into the safety module with the dismantlement information to indicate OBU's operating condition through modes such as sound, light, these required electric energy of operation by the electric capacity provides. Because the disassembly information is stored, the OBU can not be used again by the user, and can only be used after being activated again by the related management department, namely, the user can not change the disassembly information, the disassembly prevention function is finally realized, and the hardware of the disassembled OBU is not damaged and can be repeatedly used.
However, the second solution described above also has its own drawbacks: firstly, the existing disassembly signal is in a pulse form, and the signal is easily interfered by external factors such as static electricity and the like, so that the equipment is not disassembled and is mistakenly considered to be disassembled; in addition, when the temperature is higher, the leakage current of the internal capacitor becomes larger, so that the power consumption of the OBU is increased, and the capacitor energy storage may not be enough for sound and light indication and the use of the disassembly information writing operation, so that the disassembly information is not recorded effectively.
Disclosure of Invention
In view of the above, the main objective of the present invention is to provide an anti-detachment OBU and a method for implementing the same, which can avoid the situation of failure of writing detachment information due to unstable power supply, and prevent the detachment signal from being interfered by the outside.
In order to achieve the purpose, the technical scheme of the invention is realized as follows:
the invention provides an anti-disassembly OBU (on-board unit) of vehicle-mounted equipment, which comprises: a power module and a microswitch; further comprising: the system comprises an anti-disassembly detection module, a micro control module and a power supply control module; wherein,
the anti-disassembly detection module is used for detecting and adjusting a disassembly signal generated by the microswitch and sending the disassembly signal obtained by adjustment to the micro control module;
the micro control module is used for controlling the power supply control module to be closed when the OBU is in a normal working state; determining that the OBU is dismantled according to the received dismantling signal, and controlling the power supply control module to be disconnected after the dismantling information writing operation and the indication operation are both finished;
and the power supply control module is used for being switched on or switched off under the control of the micro control module, so that the power supply module supplies power or cuts off the power for the whole OBU board.
In the above scheme, the disassembly-preventing detection module adjusts the disassembly signal to be: and adjusting the disassembly signal generated by the microswitch into a level signal.
In the above scheme, the micro control module controls the power control module to close: when the OBU is in a normal working state, the micro switch is connected with a power supply passage, and the micro control module is powered on and then controls the power supply control module to be closed.
In the above scheme, the micro control module controls the power control module to be disconnected: the micro control module receives and judges the disassembly signal transmitted by the anti-disassembly detection module, after the OBU is determined to be disassembled, the disassembly information is written into the safety module, the acousto-optic indication module is made to send out an indication, and after the disassembly information writing operation and the indication operation are both finished, the power supply control module is controlled to be disconnected.
In the above scheme, the power control module is connected in parallel with the micro switch.
In the above scheme, the power control module includes a MOS array and a resistor; the MOS array comprises a first MOS, a second MOS and a third MOS; when the microswitch is closed, the base electrodes of the first MOS and the third MOS input high level, the source electrode of the first MOS is cut off to the drain electrode, the source electrode of the third MOS is conducted to the drain electrode, the drain electrode of the first MOS is low level, the base electrode of the second MOS is low level, the source electrode of the second MOS is conducted to the drain electrode, and the power supply control module is conducted; when the micro switch is switched off, the base electrodes of the first MOS and the third MOS input low level; the source electrode of the first MOS is conducted to the drain electrode, the source electrode of the third MOS is cut off to the drain electrode, the drain electrode of the first MOS is at a high level, the base electrode of the second MOS is at a high level, the source electrode of the second MOS is cut off to the drain electrode, and the power supply control module is cut off.
The invention also provides a method for realizing the anti-disassembly OBU, wherein a power supply control module is arranged in the OBU; the method further comprises the following steps:
when the OBU is in a normal working state, the power supply control module is controlled to be closed; and determining that the panel is detached according to the detachment signal, and controlling the power supply control module to be disconnected after the detachment information writing operation and the indication operation are both finished, so that the power supply stops supplying power to the whole panel.
In the above scheme, the power control module includes a MOS array and a resistor; the MOS array comprises a first MOS, a second MOS and a third MOS; the OBU controls the power supply control module to close as follows: when OBU was in normal operating condition, the last anti-disassembly touch bar of OBU was pressed, triggers the micro-gap switch closure, the base input high level of first MOS and third MOS, the source electrode of first MOS is to the drain electrode end, and the source electrode of third MOS switches on to the drain electrode, and first MOS drain electrode is the low level, and the second MOS base is low level, and the source electrode of second MOS switches on to the drain electrode, makes power control module switches on.
In the above scheme, the disconnection of the OBU control power supply control module is: when the OBU is dismantled, the anti-disassembly touch rod triggers the micro switch to be flicked, so that the micro switch is disconnected, and the base electrodes of the first MOS and the third MOS input low level; and the source electrode to the drain electrode of the first MOS is conducted, the source electrode to the drain electrode of the third MOS is cut off, the drain electrode of the first MOS is at a high level, the base electrode of the second MOS is at a high level, and the source electrode to the drain electrode of the second MOS is cut off, so that the power supply control module is cut off.
In the above scheme, the disassembly-preventing detection module adjusts the disassembly signal to be: and adjusting the disassembly signal generated by the microswitch into a level signal.
According to the anti-disassembly OBU and the implementation method thereof, the power supply control module is arranged in the OBU, and when the OBU is in a normal working state, the power supply control module is controlled to be closed; and the OBU determines that the OBU is dismantled according to the dismantling signal, controls the power supply control module to be disconnected after the dismantling information writing operation and the indication operation are both finished, and stops supplying power to the whole board. In the invention, the power supply control module and the microswitch form two parallel power supply paths, when the OBU is disassembled, the power supply control module is still in a closed state, namely the power supply path of the power supply control module is still connected, until the disassembly information writing operation and the indication operation of sound, light and the like are finished, the OBU disconnects the power supply control module, and the power supply module stops supplying power to the whole board. Therefore, the invention can continuously provide electric quantity for the writing operation of the disassembly information and the related indication operation after the OBU is disassembled so as to ensure the effective record of the disassembly information and the display of various indication information; and because the OBU can turn off the whole board power supply in time when not needed, the OBU can play the roles of saving electric energy and reducing power consumption.
In addition, when the disassembly signal generated by the micro switch is adjusted, the disassembly signal is adjusted to be the level signal, and compared with the existing pulse signal, the level signal has strong anti-interference capability, so that the error judgment on whether the OBU is disassembled can be avoided.
Drawings
FIG. 1 is a schematic structural view of an anti-disassembly OBU of the present invention;
FIG. 2 is a flow chart of a method for implementing an anti-disassembly OBU according to the present invention;
fig. 3 is a schematic structural diagram of a power control module and a micro switch in an embodiment of the invention.
Detailed Description
The basic idea of the invention is: a power supply control module is arranged in the OBU, and when the OBU is in a normal working state, the power supply control module is controlled to be closed; and the OBU determines that the OBU is dismantled according to the dismantling signal, controls the power supply control module to be disconnected after the dismantling information writing operation and the indication operation are both finished, and stops supplying power to the whole board.
Here, when the OBU is removed, the power control module remains in a closed state until it is controlled by the OBU to be opened.
The invention is described in further detail below with reference to the figures and the embodiments.
Fig. 1 is a schematic structural diagram of an anti-disassembly OBU according to the present invention, as shown in fig. 1, including a conventional power module, a security module, an audible and visual indication module, a micro switch, and an anti-disassembly touch bar; further comprising: the device comprises a micro control module, a power supply control module and an anti-disassembly detection module.
The OBU already has its components first briefly described below.
The power supply module is used for supplying power to each circuit module in the OBU whole board;
the circuit module comprises a safety module, a micro control module, an acousto-optic indication module, an anti-disassembly detection module and a power supply control module. In fig. 1, a circuit for supplying power to each circuit module by the power supply module is not shown, but only a connection relationship between the power supply control module and the micro switch for controlling the power supply function of the power supply module to be effective or ineffective and the power supply module is shown, such as a straight line with an arrow connecting the power supply module, the power supply control module and the micro switch in fig. 1.
The safety module is a safety control module based on key algorithms such as 3DES, RSA and the like, is used for encrypting and decrypting communication data of the OBU and the RSU and storing disassembly information, and can be an embedded safety control module (ESAM);
the sound indication part of the acousto-optic indication module consists of a buzzer and a driving circuit and is used for indicating the working state, command operation results and the like of the OBU in a sound mode, and the light indication part consists of indicator lamps with different colors, such as: red, green, etc. Organic Light Emitting Diodes (OLEDs), Liquid Crystal Displays (LCDs), and driving circuits, which are also used to indicate the operating status of the OBUs and command operation results, etc.
For example: when the equipment is dismantled, the red alarm lamp can flash for 1s, and the buzzer buzzes; when the equipment is triggered to be powered on by the microswitch again, the red light of the equipment is turned on to prompt that the equipment is detached, meanwhile, the LCD can display the character that the equipment is detached, and at the moment, the OBU can not work normally any more.
The anti-disassembly touch rod is made of flame-retardant acrylonitrile-styrene-butadiene copolymer (ABS) and Polycarbonate (PC), and is arranged on the OBU bottom shell and matched with the micro switch;
the microswitch mainly comprises a single-pole double-throw switch and a peripheral circuit, is used for connecting or disconnecting a power supply path after being triggered by the anti-disassembly touch rod, and is also used for generating a disassembly signal.
In the invention, the anti-disassembly detection module is used for detecting and adjusting a disassembly signal generated by the microswitch and sending the disassembly signal obtained by adjustment to the micro control module;
the micro-control module is used for controlling the power supply control module to be closed when the OBU is in a normal working state; determining that the OBU is dismantled according to the received dismantling signal, and controlling the power supply control module to be disconnected after the dismantling information writing operation and the indication operation are both finished;
the power control module is connected with the original micro switch in parallel and is used for being switched on or switched off under the control of the micro control module, so that the power module supplies power or cuts off the power for the whole OBU board.
The anti-dismantling detection module adjusts dismantling signals as follows: and adjusting the disassembly signal generated by the microswitch into a level signal.
The micro control module controls the power supply control module to be switched on or off, and specifically comprises the following steps:
when the OBU is in a normal working state, the micro switch is connected with a power supply circuit, and the micro control module is powered on and then controls the power supply control module to be closed; and receiving and judging a disassembly signal transmitted by the anti-disassembly detection module, writing disassembly information into the safety module after determining that the OBU is disassembled, and enabling the acousto-optic indication module to give an indication, and controlling the power supply control module to be disconnected after the disassembly information writing operation and the indication operation are both finished.
Fig. 2 is a schematic flow chart of an implementation method of the anti-detachment OBU of the present invention, and as shown in fig. 2, the implementation steps of the method are as follows:
step 201: a power supply control module is arranged in the OBU;
the method specifically comprises the following steps: add power control module in original OBU, power control module and original micro-gap switch are two parallelly connected switches, and micro control module in the OBU controls power control module closed or disconnection to realize that power module supplies power or cuts off the power supply for each circuit module in the whole board.
The circuit module comprises a safety module, a micro control module, an acousto-optic indication module, an anti-disassembly detection module and a power supply control module.
Step 202: when the OBU is in a normal working state, the power supply control module is controlled to be closed;
the method specifically comprises the following steps: when the OBU is in normal operating condition, the OBU is installed inside the vehicle, and the anti-disassembly touch bar on the OBU is pressed, and the anti-disassembly touch bar then triggers the micro-gap switch closure, and micro-gap switch's power supply path switch-on, the power can be for each circuit module power supply in the whole board, and when little control module power-on back, little control module control power control module is closed, and power control module's power supply path can the switch-on.
Here, when the OBU is in normal operating condition, whether anti-tear detection module among the OBU detects in real time has the dismantlement signal, the dismantlement signal is produced by micro-gap switch, is conveyed to little control module and judges after preventing tearing detection module regulation.
Step 203: the OBU determines that the OBU is dismantled according to the dismantling signal, controls the power supply control module to be disconnected after the dismantling information writing operation and the indication operation are both finished, and stops supplying power to the whole board;
the method specifically comprises the following steps: when the OBU is dismantled, the anti-disassembly touch bar triggers micro-gap switch to bounce open, makes the dismantlement signal change, and micro-gap switch's power supply route breaks promptly, but power control module's power supply route still keeps the switch-on, prevents tearing open detection module and adjusts the dismantlement signal that detects into level signal to give little control module. The micro control module judges whether the received level signal changes in high and low levels or not, determines that the level signal changes, determines that the OBU is detached, writes the detachment information into the safety module, and enables the acousto-optic indication module to give an indication, and then controls the power supply control module to be disconnected, the power supply path of the power supply control module is disconnected, and the whole panel is powered off.
Here, the micro control module may determine whether the writing of the disassembly information is completed by querying a flag bit of the disassembly information in the security module, for example: if the flag bit of the disassembly information is 1, the disassembly information is written into the memory; or whether the disassembly information is written completely is determined by the way of re-reading the disassembly information. In addition, the acousto-optic indication operation is simple, and no error occurs, so that the micro-control module does not need to judge whether the operation is finished or not, and the micro-control module can determine that the acousto-optic indication operation is finished after the acousto-optic indication module gives an indication.
For example: if the OBU is in a normal working state, the level signal obtained by adjusting the disassembly signal is a low level; after the OBU is dismantled, when the micro control module judges that the level signal is changed from the original low level to the high level, the OBU is dismantled, the micro control module writes the dismantling information into the safety module, buzzing prompt is carried out, the OLED lamp is flickered, and a user is prompted on an LCD (liquid crystal display) to show that equipment is dismantled, and then the micro control module turns off a power supply circuit of the power supply control module, and the whole panel is powered off.
In the invention, the disassembly-preventing detection module adjusts the disassembly signal into the level signal and changes the pulse signal obtained by adjustment in the prior art, thereby improving the anti-interference capability of the disassembly signal and avoiding misjudgment on whether the OBU is disassembled or not. The structure of the disassembly signal adjusting circuit in the disassembly-prevention detection module can be selected differently and is easily obtained by the related technical personnel, and the details are not described herein.
In addition, the micro control module can also adopt a digital filtering anti-shake design, so that pulse interference in the level signal is removed, and the wrong judgment on whether the OBU is disassembled or not is also avoided.
The specific structure of the power control module according to the present invention is described below with reference to an embodiment.
Fig. 3 is a schematic structural diagram of a power control module and a micro switch in this embodiment, and as shown in fig. 3, the COM terminal, the NC terminal, and the NO terminal form a single-pole double-throw micro switch; the power supply control module comprises an MOS array and a resistor, wherein the MOS array can comprise a first MOS, a second MOS and a third MOS, the first MOS is abbreviated as MOS1, the second MOS is abbreviated as MOS2, and the third MOS is abbreviated as MOS 3; the entire board power supply is the specific location where the power module actually provides power to the entire board, and not all circuit modules are shown in fig. 3.
Referring to fig. 3, the specific working principle of the power control module and the micro switch is as follows:
under a normal working state, when the OBU is installed on a vehicle, the touch rod is pressed, the COM end of the microswitch is connected with the NO end, and the microswitch is closed; the micro switch is closed, after the micro control module is powered on, the micro control module outputs high level to the base electrode of the MOS1 and the base electrode of the MOS3, so that the source electrode of the MOS1 is cut off from the drain electrode, and the source electrode of the MOS3 is conducted from the drain electrode; accordingly, the drain of MOS1 is low and the base of MOS2 is low, turning on the source to drain of MOS2, i.e.: and the power supply control module is conducted to supply power to the whole board.
When the OBU is disassembled, the touch rod is bounced off by the microswitch, the COM end is placed back to the NC end from the NO end, the microswitch is disconnected, the micro control module is disconnected, the disassembly information is written into the safety module, and relevant prompts for a user are completed, then the micro control module outputs low level to the base of the MOS1 and the base of the MOS3, so that the source to the drain of the MOS1 is conducted, the source to the drain of the MOS3 is cut off, correspondingly, the drain of the MOS1 is high level, the base of the MOS2 is high level, so that the source to the drain of the MOS2 is cut off, namely: and the power control module is cut off to cut off the power supply of the whole board.
The prompt may be a beep prompt, flashing an OLED light and displaying a word on the LCD that the device has been removed to the user.
The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, and any modifications, equivalents, improvements, etc. that are within the spirit and principle of the present invention should be included in the present invention.
Claims (10)
1. An anti-disassembly OBU, comprising: a power module and a microswitch; characterized in that, this OBU still includes: the system comprises an anti-disassembly detection module, a micro control module and a power supply control module; wherein,
the anti-disassembly detection module is used for detecting and adjusting a disassembly signal generated by the microswitch and sending the disassembly signal obtained by adjustment to the micro control module;
the micro control module is used for controlling the power supply control module to be closed when the OBU is in a normal working state; determining that the OBU is dismantled according to the received dismantling signal, and controlling the power supply control module to be disconnected after the dismantling information writing operation and the indication operation are both finished;
and the power supply control module is used for being switched on or switched off under the control of the micro control module, so that the power supply module supplies power or cuts off the power for the whole OBU board.
2. The tamper-resistant OBU according to claim 1, wherein the tamper detection module adjusts the tamper signal to: and adjusting the disassembly signal generated by the microswitch into a level signal.
3. The tamper-resistant OBU according to claim 1 or 2, wherein the micro-control module controls the power control module to close as:
when the OBU is in a normal working state, the micro switch is connected with a power supply passage, and the micro control module is powered on and then controls the power supply control module to be closed.
4. The tamper resistant OBU of claim 1 or 2, wherein the micro control module controls the power control module to turn off:
the micro control module receives and judges the disassembly signal transmitted by the anti-disassembly detection module, after the OBU is determined to be disassembled, the disassembly information is written into the safety module, the acousto-optic indication module is made to send out an indication, and after the disassembly information writing operation and the indication operation are both finished, the power supply control module is controlled to be disconnected.
5. The tamper-resistant OBU of claim 1 or 2, wherein the power control module is connected in parallel with the micro switch.
6. The tamper-resistant OBU of claim 1 or 2, wherein the power control module comprises a MOS array and a resistor; the MOS array comprises a first MOS, a second MOS and a third MOS;
when the microswitch is closed, the base electrodes of the first MOS and the third MOS input high level, the source electrode of the first MOS is cut off to the drain electrode, the source electrode of the third MOS is conducted to the drain electrode, the drain electrode of the first MOS is low level, the base electrode of the second MOS is low level, the source electrode of the second MOS is conducted to the drain electrode, and the power supply control module is conducted;
when the micro switch is switched off, the base electrodes of the first MOS and the third MOS input low level; the source electrode of the first MOS is conducted to the drain electrode, the source electrode of the third MOS is cut off to the drain electrode, the drain electrode of the first MOS is at a high level, the base electrode of the second MOS is at a high level, the source electrode of the second MOS is cut off to the drain electrode, and the power supply control module is cut off.
7. An anti-disassembly OBU implementation method is characterized in that a power supply control module is arranged in the OBU; the method further comprises the following steps:
when the OBU is in a normal working state, the power supply control module is controlled to be closed; and determining that the panel is detached according to the detachment signal, and controlling the power supply control module to be disconnected after the detachment information writing operation and the indication operation are both finished, so that the power supply stops supplying power to the whole panel.
8. The method of claim 7, wherein the power control module comprises a MOS array and a resistor; the MOS array comprises a first MOS, a second MOS and a third MOS; the OBU controls the power supply control module to close as follows:
when OBU was in normal operating condition, the last anti-disassembly touch bar of OBU was pressed, triggers the micro-gap switch closure, the base input high level of first MOS and third MOS, the source electrode of first MOS is to the drain electrode end, and the source electrode of third MOS switches on to the drain electrode, and first MOS drain electrode is the low level, and the second MOS base is low level, and the source electrode of second MOS switches on to the drain electrode, makes power control module switches on.
9. A method as claimed in claim 8, wherein the OBU controls the power control module to turn off:
when the OBU is dismantled, the anti-disassembly touch rod triggers the micro switch to be flicked, so that the micro switch is disconnected, and the base electrodes of the first MOS and the third MOS input low level; and the source electrode to the drain electrode of the first MOS is conducted, the source electrode to the drain electrode of the third MOS is cut off, the drain electrode of the first MOS is at a high level, the base electrode of the second MOS is at a high level, and the source electrode to the drain electrode of the second MOS is cut off, so that the power supply control module is cut off.
10. The method of claim 9, wherein the tamper detection module adjusts the tamper signal to: and adjusting the disassembly signal generated by the microswitch into a level signal.
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| CN201010259019.XA CN102376103B (en) | 2010-08-17 | 2010-08-17 | Anti-dismounting on-board unit and realization method thereof |
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| CN201010259019.XA CN102376103B (en) | 2010-08-17 | 2010-08-17 | Anti-dismounting on-board unit and realization method thereof |
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| CN102708594A (en) * | 2012-03-23 | 2012-10-03 | 中兴通讯股份有限公司 | Dismounting-preventing device and method |
| CN102854907A (en) * | 2012-08-03 | 2013-01-02 | 福建升腾资讯有限公司 | Tamper circuit based on STM32 chip |
| CN104691443A (en) * | 2013-12-06 | 2015-06-10 | 厦门雅迅网络股份有限公司 | Device and method for preventing vehicle-mounted equipment from being disassembled |
| CN104943654A (en) * | 2014-03-31 | 2015-09-30 | 深圳市金溢科技股份有限公司 | OBU (on-board unit), anti-disassembling method for OBU and motor vehicle |
| CN105551201A (en) * | 2015-12-07 | 2016-05-04 | 广东南方海岸科技服务有限公司 | Anti-dismounting shipborne electronic equipment and anti-dismounting method thereof |
| CN105620377A (en) * | 2014-11-27 | 2016-06-01 | 韩国克拉思通科技有限公司 | In-vehicle OBU terminal anti-disassembly system and method |
| CN107706976A (en) * | 2017-10-16 | 2018-02-16 | 中惠创智无线供电技术有限公司 | A kind of wireless charging device and its tamper monitoring system |
| CN109934943A (en) * | 2017-12-19 | 2019-06-25 | 北京聚利科技股份有限公司 | The method and apparatus for reducing OBU power consumption |
| CN110989421A (en) * | 2019-11-12 | 2020-04-10 | 惠州市德赛西威汽车电子股份有限公司 | Ultra-low power consumption OBU anti-disassembly detection system and method |
| CN112906849A (en) * | 2021-05-06 | 2021-06-04 | 北京数盾信息科技有限公司 | Password card cover opening detection method and device and password card |
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| CN104943654A (en) * | 2014-03-31 | 2015-09-30 | 深圳市金溢科技股份有限公司 | OBU (on-board unit), anti-disassembling method for OBU and motor vehicle |
| CN104943654B (en) * | 2014-03-31 | 2018-07-06 | 深圳市金溢科技股份有限公司 | A kind of OBU tampers discharging method, OBU and motor vehicle |
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| CN105551201B (en) * | 2015-12-07 | 2018-08-07 | 广东南方海岸科技服务有限公司 | Anti-dismantling boat-carrying electronic equipment and its tamper discharging method |
| CN105551201A (en) * | 2015-12-07 | 2016-05-04 | 广东南方海岸科技服务有限公司 | Anti-dismounting shipborne electronic equipment and anti-dismounting method thereof |
| CN107706976A (en) * | 2017-10-16 | 2018-02-16 | 中惠创智无线供电技术有限公司 | A kind of wireless charging device and its tamper monitoring system |
| CN107706976B (en) * | 2017-10-16 | 2019-12-20 | 中惠创智无线供电技术有限公司 | Wireless charging equipment and prevent tearing open monitoring system thereof |
| CN109934943A (en) * | 2017-12-19 | 2019-06-25 | 北京聚利科技股份有限公司 | The method and apparatus for reducing OBU power consumption |
| CN110989421A (en) * | 2019-11-12 | 2020-04-10 | 惠州市德赛西威汽车电子股份有限公司 | Ultra-low power consumption OBU anti-disassembly detection system and method |
| CN112906849A (en) * | 2021-05-06 | 2021-06-04 | 北京数盾信息科技有限公司 | Password card cover opening detection method and device and password card |
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