CN110823277A - Equipment anti-dismounting device and equipment with anti-dismounting function - Google Patents
Equipment anti-dismounting device and equipment with anti-dismounting function Download PDFInfo
- Publication number
- CN110823277A CN110823277A CN201810891993.4A CN201810891993A CN110823277A CN 110823277 A CN110823277 A CN 110823277A CN 201810891993 A CN201810891993 A CN 201810891993A CN 110823277 A CN110823277 A CN 110823277A
- Authority
- CN
- China
- Prior art keywords
- power supply
- circuit
- equipment
- controller
- diode
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D21/00—Measuring or testing not otherwise provided for
-
- G—PHYSICS
- G05—CONTROLLING; REGULATING
- G05B—CONTROL OR REGULATING SYSTEMS IN GENERAL; FUNCTIONAL ELEMENTS OF SUCH SYSTEMS; MONITORING OR TESTING ARRANGEMENTS FOR SUCH SYSTEMS OR ELEMENTS
- G05B19/00—Programme-control systems
- G05B19/02—Programme-control systems electric
- G05B19/04—Programme control other than numerical control, i.e. in sequence controllers or logic controllers
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Engineering & Computer Science (AREA)
- Automation & Control Theory (AREA)
- Power Sources (AREA)
Abstract
The invention discloses an equipment anti-dismantling device and equipment with an anti-dismantling function, which comprises: the anti-disassembly detection circuit is connected with the controller of the device at the output end and is used for detecting whether the device is disassembled in real time when the conventional power supply of the controller supplies power, so that the controller does not execute a normal operation time sequence after receiving a detection result that the device is disassembled; the standby circuit is used for supplying power to the anti-dismounting detection circuit after the conventional power supply is powered off so as to facilitate the anti-dismounting detection circuit to continue to detect in real time; and provides the controller with the power required for receiving the detection result with the device detached. Therefore, the device for preventing the equipment from being disassembled can continue to detect even after the conventional power supply is powered off, so that the functional information confidentiality and the application safety of the equipment are improved.
Description
Technical Field
The invention relates to the field of anti-disassembly detection, in particular to an equipment anti-disassembly device and equipment with an anti-disassembly function.
Background
At present, for some manufacturers of security-type devices, the security performance of the function information of the devices is very important, and if the devices are disassembled by others, the leakage of the function information is likely to be caused, and the application security of the devices at this time cannot be ensured, so that the device anti-disassembling device is gradually developed in order to prevent the devices from being disassembled. In the prior art, there are two kinds of equipment anti-dismounting devices: first, a physical tamper-evident device, such as a structural lock with high strength, prevents the device from being removed by others, but the physical tamper-evident device cannot detect whether the device is removed; the second kind, the dismouting is prevented to electric detection circuit puts, and it utilizes electrical contact mode check out test set whether dismantled, but, this electric detection circuit prevents that the dismouting is put and to have the risk that can't detect after the outage to lead to the functional information security performance of equipment relatively poor, the applied security performance is lower.
Therefore, how to provide a solution to the above technical problem is a problem that needs to be solved by those skilled in the art.
Disclosure of Invention
The invention aims to provide an equipment anti-disassembly device and equipment with an anti-disassembly function, which can continuously detect even after a conventional power supply is powered off, thereby improving the functional information confidentiality and application safety of the equipment.
In order to solve the above technical problem, the present invention provides an apparatus detachment prevention device, disposed inside an apparatus, comprising:
the anti-disassembly detection circuit is connected with the controller of the equipment at the output end and is used for detecting whether the equipment is disassembled in real time when a conventional power supply of the controller supplies power, so that the controller does not execute a normal operation time sequence after receiving a detection result that the equipment is disassembled;
the standby circuit is used for supplying power to the anti-dismantling detection circuit after the conventional power supply is powered off so as to facilitate the continuous real-time detection of the anti-dismantling detection circuit; and provides the controller with the electric energy required by the disassembled detection result of the receiving equipment.
Preferably, the power backup circuit comprises a first diode, a rechargeable battery, a controllable switch and a second diode; wherein:
the anode of the first diode is connected with the output end of the conventional power supply, the cathode of the first diode is respectively connected with the anode of the rechargeable battery, the power supply end of the anti-disassembly detection circuit and the first end of the controllable switch, the cathode of the rechargeable battery is grounded, the second end of the controllable switch is connected with the anode of the second diode, and the cathode of the second diode is connected with the power supply end of the controller;
the tamper detection circuit is specifically configured to control the controllable switch to be turned on and output a tamper detection result to the controller when it is detected that the device is detached, so that the standby circuit provides the controller with electric energy required to receive the tamper detection result when the conventional power supply is powered off.
Preferably, the power backup circuit further comprises a current limiting resistor and a filter capacitor; wherein:
the first end of the current-limiting resistor is connected with the output end of the conventional power supply, the second end of the current-limiting resistor is connected with the anode of the first diode, the first end of the filter capacitor is connected with the cathode of the second diode, and the second end of the filter capacitor is grounded.
Preferably, the controllable switch is a solid-state relay, and the first end and the second end of the controllable switch are used as two output controlled ends of the solid-state relay one by one; the anti-disassembly detection circuit comprises a metal patch, an inductive switch circuit, a first current-limiting resistor, a switch tube, a first photoelectric coupler, a second photoelectric coupler, a discharge diode and a second current-limiting resistor, wherein the metal patch is fixed on the side of the equipment shell;
the first photoelectric coupler comprises a first light emitting diode and a first phototriode, the second photoelectric coupler comprises a second light emitting diode and a second phototriode, and the power supply end of the anti-disassembly detection circuit comprises a first power supply end, a second power supply end, a third power supply end and a fourth power supply end; wherein:
the power supply end of the inductive switch circuit is used as a first power supply end, the output end of the inductive switch circuit is connected with the control end of the switch tube, the first end of the switch tube is connected with the first end of the first current-limiting resistor, the second end of the first current-limiting resistor is used as a second power supply end, the second end of the switch tube is connected with the anode of the first light-emitting diode, the cathode of the first light-emitting diode is connected with the anode of the second light-emitting diode, the cathode of the second light-emitting diode is grounded, the collector electrode of the first phototriode is respectively connected with the first input control end of the solid-state relay and the anode of the discharge diode, the second input control end of the solid-state relay is connected with the cathode of the discharge diode, the common end of the second phototriode is used as a third power supply end of the discharge diode, and the emitter electrode of the first phototriode, a collector of the second phototriode is connected with a first end of the second current-limiting resistor, a common end of the second phototriode is used as an output end of the second phototriode, a second end of the second current-limiting resistor is used as a fourth power supply end of the second phototriode, and an emitter of the second phototriode is grounded;
the inductive switch circuit is used for sensing the distance between the inductive switch circuit and the metal patch, and when the distance between the inductive switch circuit and the metal patch is larger than a preset sensing distance, the switch tube is controlled to be closed.
Preferably, the standby circuit comprises an environmental energy device, an energy collector matched with the environmental energy device and a rechargeable battery; wherein:
the first input end of the energy collector is connected with the output end of the conventional power supply, the second input end of the energy collector is connected with the environmental energy device, the output ends of the energy collector and the environmental energy device are respectively connected with the power supply end of the anti-disassembly detection circuit and the power supply end of the controller, the charging end of the energy collector is connected with the anode of the rechargeable battery, and the cathode of the rechargeable battery is grounded;
the energy collector is used for converting the energy collected by the environmental energy device into electric energy to be stored so as to automatically maintain the power supply requirements of the anti-dismantling detection circuit and the controller after the conventional power supply is powered off.
Preferably, the environmental energy source device is embodied as a photovoltaic cell or a magnetic source collecting device.
Preferably, the tamper detection circuit includes a metal patch fixed to the device case side and an inductive switching circuit; wherein:
the output end of the inductance switch circuit serves as the output end of the anti-disassembly detection circuit and is used for sensing the distance between the inductance switch circuit and the metal patch, when the distance between the inductance switch circuit and the metal patch is larger than a preset sensing distance, the fact that the equipment is disassembled is determined, and the detection result that the equipment is disassembled is sent to the controller.
In order to solve the technical problem, the invention also provides equipment with an anti-disassembly function, which comprises a controller and any one of the anti-disassembly devices.
Preferably, the controller comprises a CPU, a memory circuit, and a clock circuit having a separate power supply;
the CPU is respectively connected with the clock circuit and the storage circuit, and is specifically used for reading the time mark of the clock circuit at the moment after receiving the detection result that the equipment is detached, and storing the time mark, the detached action mark and the equipment number into the storage circuit, so that a normal running time sequence is not executed under the condition that the storage circuit stores the equipment detachment information.
Preferably, the apparatus further comprises a communication circuit connected to the CPU;
the CPU is also used for uploading the equipment disassembly information to an upper computer by using the communication circuit, so that equipment manufacturers can conveniently erase the equipment disassembly information stored in the storage circuit through the upper computer and the CPU to restore the normal operation of the equipment.
The invention provides an equipment anti-dismantling device, which is arranged in equipment and comprises: the anti-disassembly detection circuit is connected with the controller of the device at the output end and is used for detecting whether the device is disassembled in real time when the conventional power supply of the controller supplies power, so that the controller does not execute a normal operation time sequence after receiving a detection result that the device is disassembled; the standby circuit is used for supplying power to the anti-dismounting detection circuit after the conventional power supply is powered off so as to facilitate the anti-dismounting detection circuit to continue to detect in real time; and provides the controller with the power required for receiving the detection result with the device detached.
Compared with the device anti-dismounting device in the prior art, the device anti-dismounting device comprises an anti-dismounting detection circuit and a standby power circuit, wherein the anti-dismounting detection circuit can detect whether the device is dismounted in real time; the power supply circuit can continue to supply power for the anti-disassembly detection circuit under the condition that the conventional power supply source of the equipment is powered off, so that the anti-disassembly detection circuit can continue to detect, and the controller can also receive the detection result that the equipment is disassembled under the condition that the conventional power supply source is powered off due to the existence of the power supply circuit, so that a normal operation time sequence is not executed any more, and the application safety of the equipment and the function information of the confidential equipment are protected. Therefore, the device for preventing the equipment from being disassembled can continue to detect even after the conventional power supply is powered off, so that the functional information confidentiality and the application safety of the equipment are improved.
The invention also provides equipment with the anti-dismantling function, and the equipment has the same beneficial effects as the anti-dismantling device of the equipment.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed in the prior art and the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a first embodiment of an anti-disassembly device for equipment according to the present invention;
fig. 2 is a schematic structural diagram of a second embodiment of an anti-disassembly device for equipment according to the present invention;
FIG. 3 is a schematic structural diagram of the tamper detection circuit shown in FIG. 2 according to the present invention;
FIG. 4 is a schematic diagram of a specific structure of the tamper detection circuit shown in FIG. 3 according to the present invention;
FIG. 5 is a schematic structural diagram of a third embodiment of an anti-tamper apparatus according to the present invention;
fig. 6 is a schematic structural diagram of an apparatus with a tamper-evident function according to the present invention.
Detailed Description
The core of the invention is to provide the device for preventing the equipment from being disassembled and the equipment with the function of preventing the equipment from being disassembled, so that the detection can be continued even after the conventional power supply is powered off, and the functional information confidentiality and the application safety of the equipment are improved.
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a first embodiment of an apparatus detachment prevention device provided in the present invention.
Inside this equipment is prevented dismouting and is put and locate equipment, include:
the anti-disassembly detection circuit 1 is connected with the controller of the device at the output end and is used for detecting whether the device is disassembled in real time when the conventional power supply of the controller supplies power, so that the controller does not execute a normal operation time sequence after receiving a detection result that the device is disassembled;
the standby circuit 2 is used for supplying power to the anti-dismounting detection circuit 1 after the conventional power supply is powered off so as to facilitate the anti-dismounting detection circuit 1 to continue to detect in real time; and provides the controller with the power required for receiving the detection result with the device detached.
It should be noted in advance that the preset in the present application is set in advance, and only needs to be set once, and the preset is not needed to be reset unless modified according to actual conditions.
Specifically, the device is prevented tearing open that this application provided is including preventing tearing open detection circuitry 1 and spare circuit 2, and its theory of operation is:
1) under the condition that a conventional power supply contained in the equipment normally works, the electric energy output by the conventional power supply is used by the controller and the anti-dismantling detection circuit 1, at the moment, the controller is in a normal working state, and the anti-dismantling detection circuit 1 is in a real-time detection state; the anti-disassembly detection circuit 1 is used for detecting whether the equipment is disassembled in real time and sending a detection result to the controller, and if the controller receives the detection result that the equipment is disassembled, the normal operation time sequence is not executed (namely, a disassembly protection measure is taken, as long as the controller stores relevant information that the equipment is disassembled, the controller does not execute the normal operation time sequence, namely, the meaning of 'no longer', so that the leakage of the function information of the equipment is prevented; and if the controller receives a detection result that the equipment is not detached, the controller does not process the detection result. When the anti-disassembly detection circuit 1 detects that the equipment is disassembled, the controller does not execute a normal operation time sequence any more, namely, the equipment cannot operate at the moment, so that the application safety of the equipment is protected. In addition, after the equipment is disassembled, the controller can control the controller and subsequent circuits to enter a low power consumption mode or a power-off mode so as to save the electric energy of a conventional power supply.
2) Under the condition that the conventional power supply is powered off, the standby circuit 2 supplies power to the anti-disassembly detection circuit 1, so that the anti-disassembly detection circuit 1 can continue to detect even after the conventional power supply is powered off; in addition, the standby circuit 2 also provides the controller with electric energy required by the controller to receive the detection result that the equipment is detached, so that the controller can also receive the information that the equipment is detached under the condition that the conventional power supply is powered off, detachment protection measures are taken, leakage of equipment function information is prevented, and the application safety of the equipment is protected.
The invention provides an equipment anti-dismantling device, which is arranged in equipment and comprises: the anti-disassembly detection circuit is connected with the controller of the device at the output end and is used for detecting whether the device is disassembled in real time when the conventional power supply of the controller supplies power, so that the controller does not execute a normal operation time sequence after receiving a detection result that the device is disassembled; the standby circuit is used for supplying power to the anti-dismounting detection circuit after the conventional power supply is powered off so as to facilitate the anti-dismounting detection circuit to continue to detect in real time; and provides the controller with the power required for receiving the detection result with the device detached.
Compared with the device anti-dismounting device in the prior art, the device anti-dismounting device comprises an anti-dismounting detection circuit and a standby power circuit, wherein the anti-dismounting detection circuit can detect whether the device is dismounted in real time; the power supply circuit can continue to supply power for the anti-disassembly detection circuit under the condition that the conventional power supply source of the equipment is powered off, so that the anti-disassembly detection circuit can continue to detect, and the controller can also receive the detection result that the equipment is disassembled under the condition that the conventional power supply source is powered off due to the existence of the power supply circuit, so that a normal operation time sequence is not executed any more, and the application safety of the equipment and the function information of the confidential equipment are protected. Therefore, the device for preventing the equipment from being disassembled can continue to detect even after the conventional power supply is powered off, so that the functional information confidentiality and the application safety of the equipment are improved.
On the basis of the above-described embodiment:
referring to fig. 2, fig. 2 is a schematic structural diagram of a second embodiment of an apparatus detachment prevention device provided in the present invention.
As a preferred embodiment, the standby circuit 2 includes a first diode D1, a rechargeable battery BATT, a controllable switch K, and a second diode D2; wherein:
the anode of the first diode D1 is connected with the output end of the conventional power supply, the cathode of the first diode D1 is respectively connected with the anode of the rechargeable battery BATT, the power supply end of the anti-disassembly detection circuit 1 and the first end of the controllable switch K, the cathode of the rechargeable battery BATT is grounded, the second end of the controllable switch K is connected with the anode of the second diode D2, and the cathode of the second diode D2 is connected with the power supply end of the controller;
the tamper-proof detection circuit 1 is specifically configured to control the controllable switch K to be closed and output the tamper detection result to the controller when it is detected that the device is detached, so that the standby circuit 2 provides the controller with electric energy required for receiving the tamper detection result at this time when the conventional power supply is powered off.
Specifically, the standby circuit in the second embodiment of the present application includes a first diode D1, a rechargeable battery BATT, a controllable switch K, and a second diode D2, where a full-power voltage Vbatt of the rechargeable battery BATT is smaller than an output voltage Vin of the conventional power supply (since the power of the rechargeable battery BATT is limited, the standby circuit is more suitable for a case where the conventional power supply is powered off for a short time). The working principle of the standby circuit is as follows:
under the condition that the conventional power supply normally works, the conventional power supply charges the rechargeable battery BATT until the rechargeable battery BATT is charged to the full-power voltage Vbatt, and at the moment, the tamper-proof detection circuit 1 and the controller are both in a normal working state. When the anti-detachment detection circuit 1 detects that the device is detached, on one hand, the controllable switch K is controlled to be closed, and since the full-power voltage Vbatt of the rechargeable battery BATT is less than the power supply voltage VCC of the controller, the second diode D2 is cut off, and the power supply of the controller is not affected; and on the other hand, the disassembled detection result is output to the controller, so that the controller stops and does not execute a normal operation time sequence after receiving the disassembled detection result.
The positive pole of the rechargeable battery BATT is connected with the power supply end of the anti-dismantling detection circuit 1, and specifically, when the conventional power supply works normally, the anti-dismantling detection circuit 1 utilizes the electric energy output by the conventional power supply; when the conventional power supply is powered off, the anti-removal detection circuit 1 utilizes the electric energy stored in the rechargeable battery BATT.
In order to prevent that the electric energy of the rechargeable battery BATT is quickly consumed by the controller and other electronic components when the conventional power supply is powered off, so that the anti-detachment detection circuit 1 cannot continuously detect the equipment, the standby circuit in the second embodiment of the present application includes a first diode D1 and a controllable switch K, wherein the first diode D1 utilizes the characteristic of unidirectional conduction of the first diode D1, and when the conventional power supply is powered off, the first diode D1 is cut off; and the controllable switch K is in an off state under the condition that the conventional power supply is powered off and the equipment is not detached, so that the rechargeable battery BATT only supplies power to the anti-detachment detection circuit 1 under the condition that the conventional power supply is powered off and the equipment is not detached, and the electric energy required by detection is supplied to the anti-detachment detection circuit 1 for a longer time. The type of the first diode D1 can be determined by the application platform of the voltage of the rechargeable battery BATT, so that the charging voltage of the rechargeable battery BATT can be estimated according to the conventional power supply and the voltage drop of the first diode D1.
Because the controller is in the outage state after conventional power supply outage, can't receive the testing result that anti-tear detection circuit 1 sent, so when anti-tear detection circuit 1 detects that equipment is dismantled, the controller can't make dismantlement safeguard measure, consider this point, anti-tear detection circuit 1 of this embodiment is when detecting that equipment is dismantled, control controllable switch K closes, make rechargeable battery BATT provide the required electric energy of receiving the detection result of being dismantled this moment for the controller, thereby make the controller make dismantlement safeguard measure after receiving the detection result of being dismantled this moment, the controller at this moment is in low-power consumption mode.
If the conventional power supply is not powered on, but the casing of the equipment is installed to a state before being detached, the detection result of the anti-detachment detection circuit 1 at this time is that the equipment is not detached, the anti-detachment detection circuit 1 controls the controllable switch K to be switched off, and then the controller exits the low power consumption mode to execute the power-off operation. When the regular power supply is powered on again, the controller does not execute a normal operation sequence because the controller has the history of storing the relevant information that the equipment is detached.
As a preferred embodiment, the standby circuit 2 further includes a current limiting resistor R and a filter capacitor C; wherein:
the first end of the current-limiting resistor R is connected with the output end of the conventional power supply, the second end of the current-limiting resistor R is connected with the anode of the first diode D1, the first end of the filter capacitor C is connected with the cathode of the second diode D2, and the second end of the filter capacitor C is grounded.
Further, the standby circuit in the second embodiment of the present application further includes a filter capacitor C and a current limiting resistor R, where the filter capacitor C is used to filter an interference signal in a power supply signal of the controller, so as to improve the quality of the power supply signal. The current limiting resistor R is used to limit the current flowing into the rechargeable battery BATT, so as to prevent the rechargeable battery BATT from being burnt out due to excessive current. The value of the current limiting resistor R can be determined according to the capacity of the rechargeable battery BATT and the maximum charging current. In addition, the charging connection between the conventional power supply and the rechargeable battery BATT may also be an integrated power conversion circuit, instead of a simple circuit composed of the current limiting resistor R and the first diode D1, which is not limited herein.
Referring to fig. 3, fig. 3 is a schematic structural diagram of the tamper detection circuit shown in fig. 2 according to the present invention.
As a preferred embodiment, the controllable switch K is embodied as a solid-state relay, and the first end and the second end of the controllable switch K are respectively used as two output controlled ends of the solid-state relay; the anti-disassembly detection circuit 1 comprises a metal patch fixed on the side of an equipment shell, an inductance switch circuit, a first current limiting resistor R1, a switch tube Q, a first photoelectric coupler N1, a second photoelectric coupler N2, a discharge diode D and a second current limiting resistor R2;
the first photoelectric coupler N1 comprises a first light emitting diode and a first phototriode, the second photoelectric coupler N2 comprises a second light emitting diode and a second phototriode, and the power supply end of the anti-disassembly detection circuit 1 comprises a first power supply end, a second power supply end, a third power supply end and a fourth power supply end; wherein:
the power supply end of the inductive switch circuit is used as a first power supply end, the output end of the inductive switch circuit is connected with the control end of a switch tube Q, the first end of the switch tube Q is connected with the first end of a first current-limiting resistor R1, the second end of the first current-limiting resistor R1 is used as a second power supply end, the second end of the switch tube Q is connected with the anode of a first light-emitting diode, the cathode of the first light-emitting diode is connected with the anode of a second light-emitting diode, the cathode of the second light-emitting diode is grounded, the collector electrode of a first phototriode is respectively connected with the first input control end of a solid-state relay and the anode of a discharge diode D, the second input control end of the solid-state relay is connected with the cathode of the discharge diode D, the common end of the second phototriode is used as a third power supply end, the emitter electrode of the first phototriode is grounded, the collector electrode of, the common end of the second phototriode is used as the output end of the second phototriode, the second end of the second current limiting resistor R2 is used as the fourth power supply end of the second phototriode, and the emitter of the second phototriode is grounded;
the inductance switch circuit is used for sensing the distance between the inductance switch circuit and the metal patch, and when the distance between the inductance switch circuit and the metal patch is larger than a preset sensing distance, the switch tube Q is controlled to be closed.
Specifically, considering that most of the conventional electrical detection circuit detachment prevention devices are contact type detection devices, such as an electrical detection circuit detachment prevention device including a detection switch, when the device is installed, the detection switch is pressed down by a housing thereof, the detection switch is in a closed state, when the device is detached, the housing thereof is separated from the device body, the detection switch is turned off, so that the electrical detection circuit detachment prevention device determines whether the device is detached according to the on-off state of the detection switch, however, the detection switch is aged due to long-time friction, the service life of the detection switch is reduced when the number of times of the detection switch is large, and the environmental immunity of the detection switch is low, the detachment prevention detection circuit according to the second embodiment of the present application is designed with a metal patch, an inductive switch circuit, a first current limiting resistor R1, a switching tube Q, a first photocoupler N1, a second photocoupler N2, a second photocoupler, a metal patch, and a switch according to a non-contact type detection principle, The working principle of the discharge diode D and the second current limiting resistor R2 is as follows:
the metal patch is fixed on the side of the equipment shell, the inductance switch circuit senses the distance between the inductance switch circuit and the metal patch by utilizing the magnetic induction of the inductance switch circuit and the metal patch, compares the distance between the inductance switch circuit and the set sensing distance (the inductance switch circuit is positioned in the equipment, a sensing device contained in the inductance switch circuit is right opposite to the metal patch, and the set sensing distance is generally equal to the distance between the sensing device and the metal patch when the equipment is installed), and when the distance between the inductance switch circuit and the set sensing distance is larger than the set sensing distance, the equipment shell is far away from the equipment body, namely the equipment is disassembled, the inductance switch circuit controls the switch tube Q to be closed, so that the first photoelectric coupler N1 and the second photoelectric coupler N2 are both conducted. The voltage of the collector YX1 of the second phototransistor before being turned off is Vbatt and is high (the device is not detached); after the device is switched on, the voltage is pulled down to be low level (the device is detached); the controller determines whether the device is detached according to the high-low state of the level of the collector YX1 of the second phototransistor.
The known controllable switch K is a solid-state relay, and when the first photoelectric coupler N1 is turned on, that is, the first phototriode is turned on, the solid-state relay is closed, so that the standby circuit 2 supplies the controller with the electric energy required for receiving the detached detection result after the conventional power supply is powered off.
Because the coil is contained in the part of the solid-state relay connected with the first phototriode, the coil is actually an inductor, when the solid-state relay is released, the coil can generate induced voltage with opposite directions and high voltage due to sudden power failure, and the solid-state relay is easily damaged by the voltage, a discharge diode D is connected in parallel on the part of the solid-state relay in an anti-parallel mode to play a role in discharging current of the coil, and therefore the solid-state relay is protected.
In addition, this application also can directly select for use the metal screw of fixed shell usefulness as the metal paster, need not to establish the metal paster in addition.
Referring to fig. 4, fig. 4 is a schematic structural diagram of the tamper detection circuit shown in fig. 3 according to the present invention.
Further, the working principle of the inductive switch circuit is as follows: assuming that the distance between the induction coil L1 (the above sensing device) and the metal patch on the device case side is D, the presence of the metal patch affects the inductance value of the induction coil L1 measured by the differential induction switch (the closer the distance is, the smaller the measured inductance value of the induction coil L1 is; the farther the distance is, the larger the measured inductance value of the induction coil L1 is), the differential induction switch compares the measured inductance value of the induction coil L1 with the measured inductance value of the reference coil L2, when the inductance value of the induction coil L1 is greater than the inductance value of the reference coil L2, the OUT pin outputs high level, and the switching tube Q is turned on; when the inductance value of the induction coil L1 is not greater than the inductance value of the reference coil L2, the OUT pin outputs low level, and the switch tube Q is turned off.
This application is through the size of adjustment adjustable resistance RP, can indirectly adjust the size of the inductance value of the reference coil L2 of differential inductive switch comparison link (here is not the inductance value that changes reference coil L2, only changes the comparative value), so the size of adjustable resistance RP has been adjusted in advance to this application to satisfy differential inductive switch OUT pin output low level when equipment is not disassembled, OUT pin output high level after equipment is disassembled.
Therefore, under the adjustment of the adjustable resistor RP, the sensing distance D can be adjusted as long as the requirements that the OUT pin outputs low level when the equipment is not disassembled and the OUT pin outputs high level after the equipment is disassembled of the differential sensing switch are met, so that the sensing distance adjusting device is suitable for different requirements of different occasions on the sensing distance.
Referring to fig. 5, fig. 5 is a schematic structural diagram of a third embodiment of an apparatus detachment prevention device provided in the present invention.
As a preferred embodiment, the power backup circuit 2 comprises an ambient energy source device 21, an energy harvester 22 matched with the ambient energy source device 21 and a rechargeable battery batt; wherein:
a first input end of the energy collector 22 is connected with an output end of a conventional power supply, a second input end of the energy collector is connected with the environmental energy device 21, an output end of the energy collector is respectively connected with a power supply end of the anti-disassembly detection circuit 1 and a power supply end of the controller, a charging end of the energy collector is connected with a positive electrode of the rechargeable battery batt, and a negative electrode of the rechargeable battery batt is grounded;
the energy collector 22 is used for converting the energy collected by the environmental energy device 21 into electric energy to be stored, so as to automatically maintain the power supply requirement of the tamper detection circuit 1 and the controller after the conventional power supply is powered off.
Specifically, the power backup circuit in the third embodiment of the present application includes the environmental energy device 21, the energy harvester 22, and the rechargeable battery batt (since the external energy source is not limited, the power backup circuit is more suitable for the case that the conventional power supply is powered off for a long time). The environment energy device 21 is used for collecting energy of an external environment, the energy collector 22 converts the energy collected by the environment energy device 21 into electric energy to be stored, and the energy collector 22 charges the rechargeable battery batt after the electric energy is sufficiently stored, so that the rechargeable battery batt is sufficient in electric energy when the external energy is lost, and further power supply of a subsequent circuit is realized. In addition, the load power consumption and the charging current of the rechargeable battery batt are reasonably designed so as to ensure that the equipment can work for a long time under the condition that the external energy source and the rechargeable battery batt supply power alternately.
The energy collector 22 has two input channels, one channel inputs the electric energy of the conventional power supply, and the other channel inputs the energy collected by the environmental energy device 21. When the conventional power supply works normally, the energy collector 22 outputs the electric energy of the conventional power supply; after the conventional power supply is powered off, the energy collector 22 immediately outputs the electric energy stored by itself, so that the anti-dismantling detection circuit and the controller are ensured to be powered off continuously. Based on this, the controller and its subsequent circuit can select low-power consumption device to practice thrift the electric energy.
As a preferred embodiment, the environmental energy source means 21 is embodied as a photovoltaic cell or a magnetic source collecting means.
Further, the environmental energy device 21 of the present application can be selected from, but not limited to, a photovoltaic cell or a magnetic source collecting device, and the present application is not limited thereto, and depends on the external actual environment.
As a preferred embodiment, the tamper detection circuit 1 includes a metal patch fixed to the device case side and an inductive switching circuit; wherein:
the output end of the inductance switch circuit is used as the output end of the anti-disassembly detection circuit 1 and used for sensing the distance between the inductance switch circuit and the metal patch, when the distance between the inductance switch circuit and the metal patch is larger than the preset sensing distance, the fact that the equipment is disassembled is determined, and the detection result that the equipment is disassembled is sent to the controller.
Specifically, the tamper detection circuit in the third embodiment of the present application includes a metal patch and an inductive switching circuit, where the inductive switching circuit adopts the inductive switching circuit shown in fig. 4, so as to implement non-contact detection, which is not described herein again. Therefore, when the equipment is not disassembled, the OUT pin of the differential sensing switch outputs low level; when the device is detached, the OUT pin of the differential inductive switch outputs a high level, and in this embodiment, the controller determines whether the device is detached according to the level high-low state (detection result) of the OUT pin of the differential inductive switch, so as to determine whether to take a detachment protection measure. In addition, the EN enabling pin of the differential sensing switch can be connected with the CPU, and the CPU can directly control the working sampling frequency of the differential sensing switch through the EN enabling pin, so that the power consumption of the differential sensing switch is reduced.
In addition, the tamper detection circuit of the third embodiment of the present application can also refer to the tamper detection circuit of the second embodiment, a switch tube and a photoelectric coupler are added to an OUT pin (i.e., an output end of the inductive switch circuit) of the differential inductive switch, and the controller determines whether the device is detached according to a level state of a collector of a photosensitive triode in the photoelectric coupler. The application is not particularly limited as to which tamper detection circuit is specifically selected, and depends on the actual common ground requirement.
The invention also provides equipment with an anti-disassembly function, which comprises a controller and any one of the anti-disassembly devices.
For the introduction of the device provided in this embodiment, please refer to the above-mentioned embodiment of the device detachment prevention apparatus, which is not described herein again.
Referring to fig. 6, fig. 6 is a schematic structural diagram of an apparatus with a tamper-proof function according to the present invention. The device is based on the above embodiment:
as a preferred embodiment, the controller includes a CPU, a memory circuit a1, and a clock circuit a2 having a separate power supply;
the CPU is connected to the clock circuit a2 and the memory circuit a1, respectively, and is specifically configured to, after receiving a detection result that the device is detached, read the timestamp of the clock circuit a2 at this time, and store the timestamp, the detached operation flag, and the device number in the memory circuit a1, so that the normal operation timing is not executed any longer under the condition that the memory circuit a1 holds the device detachment information.
Specifically, the controller of the present application includes a CPU, a storage circuit a1, and a clock circuit a2, and it is known that as long as the controller stores the relevant information that the device is detached, the controller does not execute a normal operation sequence, and based on this, the specific operation principle of the controller is as follows:
the CPU reads the detection result output from the tamper-proof detection circuit 1 in real time when the CPU is normally powered on, reads the time stamp (representing the time when the device is detached) of the clock circuit a2 at this time when the detection result that the device is detached is read, and stores the device detachment information with the time stamp in the storage circuit a1 so as not to execute the normal operation timing any more under the condition that the storage circuit a1 holds the device detachment information. The device detachment information here includes a time stamp, a detached operation stamp, and a device number. The storage circuit A1 is a medium capable of realizing power-down storage, such as EEPROM of CPU extension, FRAM of CPU extension or Flash of CPU itself.
After the conventional power supply of the CPU is powered off, when the anti-disassembly detection circuit 1 detects that the equipment is disassembled, the standby circuit 2 provides a series of electric energy required by reading and storing for the CPU. In addition, considering that the clock circuit a2 is also in a power-off state after the normal power supply circuit of the device is powered off and the clock information cannot be updated in real time, in this case, the time stamp of the clock circuit a2 read after the CPU is powered on is not accurate, so the clock circuit a2 in the present application supplies power alone to prevent the clock information from being updated in real time after the normal power supply circuit of the device is powered off. Specifically, the separate power supply of the clock circuit a2 may be the power backup power supply in the power backup circuit 2, so that the detection by the tamper detection circuit 1 and the timing by the clock circuit a2 maintain the same power supply state.
As a preferred embodiment, the apparatus further includes a communication circuit B connected to the CPU;
the CPU is also used for uploading the equipment disassembly information to the upper computer by using the communication circuit B, so that equipment manufacturers can erase the equipment disassembly information stored in the storage circuit A1 through the upper computer and the CPU to restore the normal operation of the equipment.
Further, the equipment that this application provided still includes the communication circuit B who is connected with CPU, and CPU utilizes communication circuit B can be with equipment dismantlement information upload to the host computer. The communication circuit B CAN upload the equipment disassembly information to an upper computer in a wired transmission mode (such as a network port, a serial port, a CAN communication port and the like); and equipment disassembly information can be uploaded to an upper computer in a wireless transmission mode (such as GPRS, wifi and the like). The equipment manufacturer can check the equipment disassembly information through the upper computer so as to acquire the time for disassembling the equipment and the equipment number. Then, the device manufacturer can determine the application manufacturer of the device according to the device number and the factory record.
It is known that the normal operation sequence of the equipment, i.e. the established function of the normal operation of the equipment, is stopped as long as the disassembly operation occurs or occurs, thereby ensuring the application safety of the equipment. In order to restore the normal operation of the equipment, equipment manufacturers perform a corresponding action of program erasing through the upper computer and the controller aiming at the confidentiality of the functional information of the equipment, and erase the equipment disassembly information stored in the storage circuit A1; or, the equipment manufacturer dispatches a person to arrive at the location of the equipment, and erases the equipment disassembly information stored in the storage circuit a1 through the special authority of the local interface of the equipment so as to restore the normal operation of the equipment.
In addition, in order to facilitate the follow-up verification of the occurred disassembly behavior, the memory circuit A1 is divided into a real-time information area and a historical information area in advance, and a single memory area is allocated to the real-time information area; the history information area is allocated with a plurality of times of storage areas according to the memory size of the storage circuit a1, and the latest storage information position is determined by the latest stored address pointer in a loop coverage manner.
After receiving an erasing instruction sent by the upper computer or the local interface, the storage circuit a1 only erases the real-time information area and retains the information of the historical information area, so that the information of the historical information area can be read through the upper computer or the local interface in the following, and the disassembly behavior can be verified. It is to be understood that, as mentioned above: the controller does not execute the normal operation timing as long as the controller stores the information related to the detachment of the device, and the CPU does not execute the normal operation timing regardless of the information stored in the history information area, which means that only the real-time information area stores the information related to the detachment of the device.
It is further noted that, in the present specification, relational terms such as first and second, and the like are used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Also, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising an … …" does not exclude the presence of other identical elements in a process, method, article, or apparatus that comprises the element.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (10)
1. The utility model provides a device is prevented tearing open, its characterized in that locates inside the equipment, includes:
the anti-disassembly detection circuit is connected with the controller of the equipment at the output end and is used for detecting whether the equipment is disassembled in real time when a conventional power supply of the controller supplies power, so that the controller does not execute a normal operation time sequence after receiving a detection result that the equipment is disassembled;
the standby circuit is used for supplying power to the anti-dismantling detection circuit after the conventional power supply is powered off so as to facilitate the continuous real-time detection of the anti-dismantling detection circuit; and provides the controller with the electric energy required by the disassembled detection result of the receiving equipment.
2. The tamper-evident device of claim 1, wherein the backup circuit comprises a first diode, a rechargeable battery, a controllable switch, and a second diode; wherein:
the anode of the first diode is connected with the output end of the conventional power supply, the cathode of the first diode is respectively connected with the anode of the rechargeable battery, the power supply end of the anti-disassembly detection circuit and the first end of the controllable switch, the cathode of the rechargeable battery is grounded, the second end of the controllable switch is connected with the anode of the second diode, and the cathode of the second diode is connected with the power supply end of the controller;
the tamper detection circuit is specifically configured to control the controllable switch to be turned on and output a tamper detection result to the controller when it is detected that the device is detached, so that the standby circuit provides the controller with electric energy required to receive the tamper detection result when the conventional power supply is powered off.
3. The tamper-evident device of claim 2, wherein the backup circuit further comprises a current limiting resistor and a filter capacitor; wherein:
the first end of the current-limiting resistor is connected with the output end of the conventional power supply, the second end of the current-limiting resistor is connected with the anode of the first diode, the first end of the filter capacitor is connected with the cathode of the second diode, and the second end of the filter capacitor is grounded.
4. The device detachment prevention apparatus according to any one of claims 2 to 3, wherein the controllable switch is embodied as a solid-state relay, and then a first end and a second end of the controllable switch are respectively used as two output controlled ends of the solid-state relay; the anti-disassembly detection circuit comprises a metal patch, an inductive switch circuit, a first current-limiting resistor, a switch tube, a first photoelectric coupler, a second photoelectric coupler, a discharge diode and a second current-limiting resistor, wherein the metal patch is fixed on the side of the equipment shell;
the first photoelectric coupler comprises a first light emitting diode and a first phototriode, the second photoelectric coupler comprises a second light emitting diode and a second phototriode, and the power supply end of the anti-disassembly detection circuit comprises a first power supply end, a second power supply end, a third power supply end and a fourth power supply end; wherein:
the power supply end of the inductive switch circuit is used as a first power supply end, the output end of the inductive switch circuit is connected with the control end of the switch tube, the first end of the switch tube is connected with the first end of the first current-limiting resistor, the second end of the first current-limiting resistor is used as a second power supply end, the second end of the switch tube is connected with the anode of the first light-emitting diode, the cathode of the first light-emitting diode is connected with the anode of the second light-emitting diode, the cathode of the second light-emitting diode is grounded, the collector electrode of the first phototriode is respectively connected with the first input control end of the solid-state relay and the anode of the discharge diode, the second input control end of the solid-state relay is connected with the cathode of the discharge diode, the common end of the second phototriode is used as a third power supply end of the discharge diode, and the emitter electrode of the first phototriode, a collector of the second phototriode is connected with a first end of the second current-limiting resistor, a common end of the second phototriode is used as an output end of the second phototriode, a second end of the second current-limiting resistor is used as a fourth power supply end of the second phototriode, and an emitter of the second phototriode is grounded;
the inductive switch circuit is used for sensing the distance between the inductive switch circuit and the metal patch, and when the distance between the inductive switch circuit and the metal patch is larger than a preset sensing distance, the switch tube is controlled to be closed.
5. The tamper-evident device of claim 1, wherein the backup circuit comprises an ambient energy device, an energy harvester mated with the ambient energy device, and a rechargeable battery; wherein:
the first input end of the energy collector is connected with the output end of the conventional power supply, the second input end of the energy collector is connected with the environmental energy device, the output ends of the energy collector and the environmental energy device are respectively connected with the power supply end of the anti-disassembly detection circuit and the power supply end of the controller, the charging end of the energy collector is connected with the anode of the rechargeable battery, and the cathode of the rechargeable battery is grounded;
the energy collector is used for converting the energy collected by the environmental energy device into electric energy to be stored so as to automatically maintain the power supply requirements of the anti-dismantling detection circuit and the controller after the conventional power supply is powered off.
6. Tamper evident device in accordance with claim 5, characterized in that the environmental energy means is embodied as photovoltaic cells or magnetic source collecting means.
7. The device tamper apparatus of any one of claims 5 to 6, wherein the tamper detection circuit comprises a metal patch and an inductive switching circuit secured to the device housing side; wherein:
the output end of the inductance switch circuit serves as the output end of the anti-disassembly detection circuit and is used for sensing the distance between the inductance switch circuit and the metal patch, when the distance between the inductance switch circuit and the metal patch is larger than a preset sensing distance, the fact that the equipment is disassembled is determined, and the detection result that the equipment is disassembled is sent to the controller.
8. An appliance having tamper-evident functionality, comprising a controller and further comprising an appliance tamper-evident device as claimed in any one of claims 1 to 7.
9. The tamper-resistant apparatus according to claim 8, wherein the controller includes a CPU, a memory circuit, and a clock circuit having a separate power supply;
the CPU is respectively connected with the clock circuit and the storage circuit, and is specifically used for reading the time mark of the clock circuit at the moment after receiving the detection result that the equipment is detached, and storing the time mark, the detached action mark and the equipment number into the storage circuit, so that a normal running time sequence is not executed under the condition that the storage circuit stores the equipment detachment information.
10. The tamper-resistant device of claim 9, further comprising a communication circuit connected to the CPU;
the CPU is also used for uploading the equipment disassembly information to an upper computer by using the communication circuit, so that equipment manufacturers can conveniently erase the equipment disassembly information stored in the storage circuit through the upper computer and the CPU to restore the normal operation of the equipment.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810891993.4A CN110823277B (en) | 2018-08-07 | 2018-08-07 | Equipment anti-dismounting device and equipment with anti-dismounting function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201810891993.4A CN110823277B (en) | 2018-08-07 | 2018-08-07 | Equipment anti-dismounting device and equipment with anti-dismounting function |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN110823277A true CN110823277A (en) | 2020-02-21 |
| CN110823277B CN110823277B (en) | 2021-12-17 |
Family
ID=69534057
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201810891993.4A Active CN110823277B (en) | 2018-08-07 | 2018-08-07 | Equipment anti-dismounting device and equipment with anti-dismounting function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN110823277B (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111753341A (en) * | 2020-06-29 | 2020-10-09 | 广州邦讯信息系统有限公司 | Illegal disassembly detection method for Internet of things equipment |
| CN114550398A (en) * | 2022-02-18 | 2022-05-27 | 深圳市商汤科技有限公司 | Anti-dismantling target equipment |
| WO2022222041A1 (en) * | 2021-04-20 | 2022-10-27 | Alan Arnold | Tamper detection memory save with delay |
| CN116118984A (en) * | 2023-04-18 | 2023-05-16 | 天津海翼科技有限公司 | Emergency system, device and control method for underwater unmanned underwater vehicle |
Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006008382A1 (en) * | 2004-06-21 | 2006-01-26 | Innova Card | Electronic circuit safety device |
| JP2006119987A (en) * | 2004-10-22 | 2006-05-11 | Nidec Sankyo Corp | Card reader |
| JP2007167251A (en) * | 2005-12-20 | 2007-07-05 | Olympia:Kk | Game machine and detection method and program for fraudulence in game machine |
| CN101853347A (en) * | 2010-04-27 | 2010-10-06 | 中兴通讯股份有限公司 | Dismounting monitoring method and device |
| CN102016868A (en) * | 2008-04-30 | 2011-04-13 | 日本电产三协株式会社 | Method for detecting the improper removal of electronic equipment |
| CN102682241A (en) * | 2011-03-10 | 2012-09-19 | 研祥智能科技股份有限公司 | Electronic equipment and method and system for protecting data of same |
| CN103902936A (en) * | 2014-04-02 | 2014-07-02 | 广东华大集成技术有限责任公司 | Data protection device of terminal equipment |
| CN107368759A (en) * | 2017-08-31 | 2017-11-21 | 中惠创智无线供电技术有限公司 | A kind of equipment detatching-proof system |
| 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 |
| CN207232967U (en) * | 2017-08-31 | 2018-04-13 | 中惠创智无线供电技术有限公司 | A kind of equipment detatching-proof system |
-
2018
- 2018-08-07 CN CN201810891993.4A patent/CN110823277B/en active Active
Patent Citations (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2006008382A1 (en) * | 2004-06-21 | 2006-01-26 | Innova Card | Electronic circuit safety device |
| JP2006119987A (en) * | 2004-10-22 | 2006-05-11 | Nidec Sankyo Corp | Card reader |
| JP2007167251A (en) * | 2005-12-20 | 2007-07-05 | Olympia:Kk | Game machine and detection method and program for fraudulence in game machine |
| CN102016868A (en) * | 2008-04-30 | 2011-04-13 | 日本电产三协株式会社 | Method for detecting the improper removal of electronic equipment |
| CN101853347A (en) * | 2010-04-27 | 2010-10-06 | 中兴通讯股份有限公司 | Dismounting monitoring method and device |
| CN102682241A (en) * | 2011-03-10 | 2012-09-19 | 研祥智能科技股份有限公司 | Electronic equipment and method and system for protecting data of same |
| CN103902936A (en) * | 2014-04-02 | 2014-07-02 | 广东华大集成技术有限责任公司 | Data protection device of terminal equipment |
| CN107368759A (en) * | 2017-08-31 | 2017-11-21 | 中惠创智无线供电技术有限公司 | A kind of equipment detatching-proof system |
| CN207232967U (en) * | 2017-08-31 | 2018-04-13 | 中惠创智无线供电技术有限公司 | A kind of equipment detatching-proof system |
| 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 |
Non-Patent Citations (2)
| Title |
|---|
| MICHAEL WEYRICH 等: "Architecture design of a vision-based intelligent system for automated disassembly of E-waste with a case study of traction batteries", 《2013 IEEE 18TH CONFERENCE ON EMERGING TECHNOLOGIES & FACTORY AUTOMATION (ETFA)》 * |
| 赵军 等: "YJY—1型液压系统不拆卸检测仪的研制", 《黑龙江八一农垦大学学报》 * |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111753341A (en) * | 2020-06-29 | 2020-10-09 | 广州邦讯信息系统有限公司 | Illegal disassembly detection method for Internet of things equipment |
| CN111753341B (en) * | 2020-06-29 | 2023-09-22 | 广州邦讯信息系统有限公司 | Illegal disassembly detection method for Internet of things equipment |
| WO2022222041A1 (en) * | 2021-04-20 | 2022-10-27 | Alan Arnold | Tamper detection memory save with delay |
| CN114550398A (en) * | 2022-02-18 | 2022-05-27 | 深圳市商汤科技有限公司 | Anti-dismantling target equipment |
| WO2023155484A1 (en) * | 2022-02-18 | 2023-08-24 | 上海商汤智能科技有限公司 | Anti-removal target device |
| CN116118984A (en) * | 2023-04-18 | 2023-05-16 | 天津海翼科技有限公司 | Emergency system, device and control method for underwater unmanned underwater vehicle |
| CN116118984B (en) * | 2023-04-18 | 2023-08-15 | 天津海翼科技有限公司 | Emergency system, device and control method for underwater unmanned underwater vehicle |
Also Published As
| Publication number | Publication date |
|---|---|
| CN110823277B (en) | 2021-12-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN110823277B (en) | Equipment anti-dismounting device and equipment with anti-dismounting function | |
| TW530429B (en) | Intelligent secondary battery management method and device | |
| CN103809492B (en) | One-touch multifunctional control circuit and wearing electronic product | |
| CN203705875U (en) | One-button multifunctional control circuit and wearable electronic product | |
| TW201813183A (en) | Battery device, electronic device and methods for protecting the electronic device | |
| CN112600275A (en) | Automatic charging circuit and charging method thereof | |
| CN105703021A (en) | Battery management system with low standby power consumption and battery management system awaking method | |
| CN201937560U (en) | Reset circuit | |
| CN103124097A (en) | Intelligent lithium ion charger | |
| CN201975855U (en) | Ammeter and power supply management circuit thereof | |
| CN202616815U (en) | On-board unit | |
| CN204928344U (en) | Low -power consumption image data collection camera | |
| JP2009118054A (en) | Power supply system for terminal network controller | |
| CN102270877A (en) | Power supply system | |
| CN205051670U (en) | Fall electricity from opening control circuit | |
| CN206922502U (en) | Power down protection control circuit and electronic equipment | |
| CN207664703U (en) | A kind of standby power alarm power supply circuit | |
| CN203014439U (en) | Automatic identification apparatus of charger | |
| CN203180580U (en) | An intelligent lithium ion charger | |
| CN211554286U (en) | Drop switch monitoring terminal | |
| CN207234519U (en) | Outage detection control circuit and gas meter, flow meter | |
| CN107634577A (en) | Outage detection control circuit and gas meter, flow meter | |
| CN107171414A (en) | A kind of battery management system of low-power consumption | |
| CN107800188A (en) | A kind of standby power alarm power supply circuit and oxygenerator | |
| CN203747473U (en) | Dedicated chip integrating linear charging and constant-voltage output |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| TA01 | Transfer of patent application right | ||
| TA01 | Transfer of patent application right |
Effective date of registration: 20210304 Address after: 518000 room 133-134, No.1 International Students (Longgang) Pioneer Park, Longcheng street, Longgang District, Shenzhen City, Guangdong Province Applicant after: ZONECHARGE (SHENZHEN) WIRELESS POWER SUPPLY TECHNOLOGY Co.,Ltd. Address before: 264003 Mingda West Road, Laishan District, Yantai, Shandong Province, No. 11 Applicant before: ZHONG HUI POWERISE WIRELESS POWER TECHNOLOGY Ltd. |
|
| GR01 | Patent grant | ||
| GR01 | Patent grant |