CN210803618U - Prevent tearing open quick-witted detection control circuit and electronic equipment - Google Patents
Prevent tearing open quick-witted detection control circuit and electronic equipment Download PDFInfo
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- CN210803618U CN210803618U CN201921381571.9U CN201921381571U CN210803618U CN 210803618 U CN210803618 U CN 210803618U CN 201921381571 U CN201921381571 U CN 201921381571U CN 210803618 U CN210803618 U CN 210803618U
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Abstract
The utility model discloses an anti-dismantling detection control circuit and electronic equipment.A dismantling detection switch K2 is designed for detecting whether the equipment is dismantled illegally, and if so, outputting an illegal dismantling signal; the disassembly state detection circuit is connected with the disassembly detection switch K2 and used for changing the circuit state and outputting data in the disassembly state when detecting an illegal disassembly signal; and the main control circuit is connected with the disassembly state detection circuit and used for controlling the equipment to operate according to the data in the disassembly state. Through implementing the utility model discloses, can effectively and timely detect illegal operation of tearing open the quick-witted, when detecting illegal operation of tearing open, can send the warning that electronic equipment was demolishd or electronic equipment starts unusually, do and set up that electronic equipment can't be visited by illegal user, make illegal user can't carry out illegal operation to electronic equipment.
Description
Technical Field
The utility model relates to a prevent tearing open technical field, especially relate to a prevent tearing open quick-witted detection control circuit and electronic equipment.
Background
The electronic equipment such as the existing attendance access control equipment can have the condition that an illegal user unpacks the equipment for illegal operation, a manufacturer generally can judge whether the electronic equipment is illegally unpacked or not by arranging the anti-unpacking sticker on the screw hole of the electronic equipment, but the electronic equipment can be informed to the user that the electronic equipment is illegally unpacked only when the user arrives at the site, the unpacking operation cannot be detected often, or the illegal user can illegally unpack the equipment under the condition of not damaging the anti-unpacking sticker on the screw hole, so that the user cannot know that the equipment is illegally unpacked, and the prior art cannot effectively detect and limit the illegal unpacking operation.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model lies in, to prior art in can not carrying out effectual detection and the defect of restriction to the illegal operation of tearing open the machine, provide one kind and prevent tearing open quick-witted detection control circuit and electronic equipment.
The utility model provides a technical scheme that its technical problem adopted is: construct a prevent tearing open quick-witted detection control circuit, include: the disassembly detection switch K2, the disassembly state detection circuit and the main control circuit are electrically connected in sequence;
wherein, tear quick-witted state detection circuitry open includes: a state reset input end CJ _ RES connected with the main control circuit is connected with a sixth resistor R6 in a first way through a first diode D1 and a fourth resistor R4, a second way is grounded through a second capacitor C2, a third way is connected with a seventh resistor R7, the sixth resistor R6 is connected with a dismantling signal detection end CJ _ SW through a fifth diode D5, the dismantling signal detection end CJ _ SW is connected with a dismantling detection switch K2 capable of being triggered during illegal dismantling, a first way of the seventh resistor R7 is grounded through a ninth resistor R9, a second way is connected with a base electrode of a second triode Q2, and an emitting electrode of the second triode Q2 is grounded;
the first power supply VCC is connected to the cathode of the third diode D3 through the second diode D2 in a first path, grounded through the first capacitor C1 in a second path, and connected to the collector of the second triode Q2 through the second resistor R2 in the third path; a second power supply BAT _ OUT is connected to the emitter of the first triode Q1 through the third diode D3 in a first way, connected to the collector of the second triode Q2 through a third resistor R3 and a fifth resistor R5 in a second way, and connected to the base of the first triode Q1 through the third resistor R3 in a third way;
the first path of the collector of the first triode Q1 is grounded through a tenth resistor R10, the second path is connected to the cathode of the first diode D1 through a fourth diode D4, and the third path is connected to the base of a third triode Q3 through an eighth resistor R8;
the emitter of the third triode Q3 is grounded, the first path of the collector is connected to the first power source VCC through a first resistor R1, and the second path is connected to a trip signal output terminal CJ _ DET, which is connected to the main control circuit.
Preferably, in the machine disassembly prevention detection control circuit of the present invention, the first triode Q1 is a PNP type triode, and the second triode Q2 and the third triode Q3 are NPN type triodes.
Preferably, prevent tearing open quick-witted detection control circuit in, first power VCC is + 3.3V's power supply, second power BAT _ OUT is the RTC power.
Preferably, in the machine disassembly prevention detection control circuit of the present invention, when the machine disassembly detection switch K2 is not triggered, the machine disassembly signal detection end CJ _ SW does not detect an illegal machine disassembly signal, the state reset input end CJ _ RES is a high level, the first triode Q1, the second triode Q2 and the third triode Q3 are all turned on, and the machine disassembly signal output end CJ _ DET is a low level.
Preferably, prevent tearing open quick-witted detection control circuit in, when tearing open quick-witted detection switch K2 and trigger, tear quick-witted signal detection end CJ _ SW and detect illegal signal of tearing open quick-witted, tear quick-witted signal detection end CJ _ SW and be the low level, state reset input CJ _ RES is the high level, first triode Q1 second triode Q2 with third triode Q3 all ends, tear quick-open signal output CJ _ DET and be the high level.
Preferably, in the tamper-proof detection control circuit of the present invention, the tamper detection switch K2 is a single-pole double-throw switch, the movable end contact is a first contact, and the stationary end contact includes a second contact and a third contact;
a first contact of the dismantling detection switch K2 is connected to the dismantling signal detection terminal CJ _ SW, a second contact of the dismantling detection switch K2 is grounded, and a third contact of the dismantling detection switch K2 is suspended.
Preferably, in the tamper detection control circuit of the present invention, when the tamper detection switch K2 is not triggered, the first contact is connected to the third contact; when the dismantling detection switch K2 is triggered, the first contact is connected to the second contact, and the dismantling signal detection end CJ _ SW is at a low level.
Preferably, prevent tearing open quick-witted detection control circuit in, main control circuit includes: and a power supply pin of the main controller U1 is electrically connected with the first power supply, a state reset pin is electrically connected with the state reset input end CJ _ RES, and a disassembly signal output detection pin is electrically connected with the disassembly signal output end CJ _ DET.
The utility model also discloses an electronic equipment has been constructed, including the main part, still include above-mentioned arbitrary one prevent tearing open quick-witted detection control circuit.
Through implementing the utility model discloses following beneficial effect has:
the utility model discloses a prevent tearing open quick-witted detection control circuit with tear quick-witted detection switch open, can trigger this tear quick-witted detection switch open when illegal user tears open the machine, the illegal signal of tearing open the machine of output, tear quick-witted state detection circuit and detect after the illegal signal of tearing open, can change circuit state and export the data under the state of tearing open the machine, inform main control circuit equipment by the illegal machine of tearing open, main control circuit is according to the data under the state of tearing open the machine, controlgear moves, thereby effectively and timely detect the illegal operation of tearing open the machine, when detecting the illegal operation of tearing open the machine, can send the warning that electronic equipment was demolishd or electronic equipment starts unusually, it can't be visited by illegal user to set up electronic equipment, make the illegal user can't carry out illegal.
Drawings
The invention will be further explained with reference to the drawings and examples, wherein:
FIG. 1 is a block diagram of the tamper-proof detection control circuit of the present invention;
FIG. 2 is a circuit diagram of the anti-dismantling machine detection control circuit of the present invention;
fig. 3 is a circuit diagram of a first power supply of the present invention;
fig. 4 is a circuit diagram of a second power supply of the present invention;
fig. 5 is a circuit diagram of the main control circuit of the present invention.
Detailed Description
In order to clearly understand the technical features, objects, and effects of the present invention, embodiments of the present invention will be described in detail with reference to the accompanying drawings.
Fig. 1 is the utility model discloses prevent quick-witted detection control circuit's block diagram that tears open, as shown in fig. 1, in the first embodiment, the utility model discloses an prevent quick-witted detection control circuit that tears open has been constructed, include: the disassembly detection switch K2 is used for detecting whether the equipment is disassembled illegally, and if so, outputting an illegal disassembly signal; the disassembly state detection circuit is connected with the disassembly detection switch K2 and is used for changing the circuit state and outputting data in the disassembly state when the illegal disassembly signal is detected; and the main control circuit is connected with the machine disassembling state detection circuit and used for controlling equipment to operate according to the data in the machine disassembling state.
Specifically, fig. 2 is the circuit diagram of the anti-dismantling machine detection control circuit of the present invention, as shown in fig. 2, in this embodiment, the dismantling machine state detection circuit includes: the system comprises a disassembly detection switch K2, a state reset input end CJ _ RES, a disassembly signal detection end CJ _ SW, a disassembly signal output end CJ _ DET, a first diode D1, a second diode D2, a third diode D3, a fourth diode D4, a fifth diode D5, a first resistor R1, a second resistor R2, a third resistor R3, a fourth resistor R4, a fifth resistor R5, a sixth resistor R6, a seventh resistor R7, an eighth resistor R8, a ninth resistor R9, a tenth resistor R10, a first capacitor C1, a second capacitor C2, a first triode Q1, a second triode Q2 and a third triode Q3;
a state reset input end CJ _ RES connected with the main control circuit is connected to a sixth resistor R6 through a first diode D1 and a fourth resistor R4 in a first way, a second way is grounded through a second capacitor C2, a third way is connected to a seventh resistor R7, a sixth resistor R6 is connected to a dismantling signal detection end CJ _ SW through a fifth diode D5, the dismantling signal detection end CJ _ SW is connected to a dismantling detection switch K2 capable of being triggered during illegal dismantling, a seventh resistor R7 is connected to the ground through a ninth resistor R9 in a first way, a second way is connected to the base of a second triode Q2, and the emitter of the second triode Q2 is grounded;
the first power supply VCC is connected to the cathode of the third diode D3 through the second diode D2 in a first path, grounded through the first capacitor C1 in a second path, and connected to the collector of the second triode Q2 through the second resistor R2 in the third path; the second power supply BAT _ OUT is connected to the emitter of the first triode Q1 through a third diode D3 in a first path, connected to the collector of the second triode Q2 through a third resistor R3 and a fifth resistor R5 in a second path, and connected to the base of the first triode Q1 through a third resistor R3 in a third path;
the first path of the collector of the first triode Q1 is grounded through a tenth resistor R10, the second path is connected to the cathode of the first diode D1 through a fourth diode D4, and the third path is connected to the base of the third triode Q3 through an eighth resistor R8;
the emitter of the third triode Q3 is grounded, the first path of the collector is connected to the first power source VCC through the first resistor R1, and the second path is connected to the disconnection signal output terminal CJ _ DET, which is connected to the main control circuit.
In this embodiment, the first transistor Q1 is a PNP transistor, and the second transistor Q2 and the third transistor Q3 are NPN transistors.
The first power supply VCC is a +3.3V power supply for power supply conversion when the device is powered on, and the second power supply BAT _ OUT is an RTC power supply for keeping normal operation of the time when the power-off state detection circuit is powered on. As shown in fig. 3, fig. 3 is a circuit diagram of the first power supply of the present invention, including: a third capacitor C3, a fourth capacitor C4, a fifth capacitor C5, a sixth capacitor C6, a seventh capacitor C7, an eighth capacitor C8, a ninth capacitor C9, a tenth capacitor C10, an eleventh capacitor C11, a twelfth capacitor C12, a thirteenth capacitor C13, an eleventh resistor R11, a twelfth resistor R12, a thirteenth resistor R13, a third inductor L3 and a buck chip U2; the model of the voltage reduction chip U2 is MP 1580.
An external input power supply +12V is grounded through being connected with a third capacitor C3 in one path, a fourth capacitor C4 in one path, a fifth capacitor C5 in one path, a pin PVin of a voltage reduction chip U2 in one path, a pin SVin of a voltage reduction chip U2 in one path, an eleventh resistor R11 in one path, an eleventh resistor R11 and a sixth capacitor C6 in one path, a pin SS of the voltage reduction chip U2 is grounded through a seventh capacitor C7, a pin GND of the voltage reduction chip U2 is grounded, a pin VCC of the voltage reduction chip U2 is grounded through an eighth capacitor C8 in one path, an output power supply +3.3V in one path is grounded through a thirteenth capacitor C13 in one path, a twelfth capacitor C12 in one path, an eleventh capacitor C11 in one path, a tenth capacitor C10 in one path, a pin FB of the voltage reduction chip U2 in one path, and FB 12 in one path is connected with a pin FB of the voltage reduction chip U2 in one path, one path is connected with a pin LX of the buck chip U2 through the third inductance coil L3, one path is connected with a pin BS of the buck chip U2 through the third inductance coil L3 and the ninth capacitor C9, and the pin FB of the buck chip U2 is grounded through the thirteenth resistor R13.
As shown in fig. 4, fig. 4 is a circuit diagram of a second power supply of the present invention, including: a fourteenth resistor R14, a fifteenth resistor R15, a sixteenth resistor R16, a seventeenth resistor R17, an eighteenth resistor R18, a fourteenth capacitor C14, a fifteenth capacitor C15, a battery BAT1 and a power conversion chip U3. The model number of the power conversion chip U3 is SD 3078.
The +3.3V power supply is connected to the pin SCL of the power conversion chip U3 through a fourteenth resistor R14, the +3.3V power supply is connected to the pin SDA of the power conversion chip U3 through a fifteenth resistor R15, the +3.3V power supply is connected to the pin F32K of the power conversion chip U3 through a sixteenth resistor R16, one is grounded through a fourteenth capacitor C14, one is grounded through a fifteenth capacitor C15, one is connected to the pin VDD of the power conversion chip U3, the +3.3V power supply is connected to the pin of the power conversion chip U3 through a seventeenth resistor R17, the pin GND of the power conversion chip U3 is grounded, the pin VBAT of the power conversion chip U3 is connected to the breakdown state detection circuit through an eighteenth resistor R18, the positive pole of the battery BAT1 is connected to the breakdown state detection circuit, and the negative pole is grounded.
In this embodiment, when the electronic device is not powered on, the battery BAT1 in the second power supply circuit continuously supplies power to the power failure state detection circuit, and keeps the power failure state detection circuit operating normally. When the electronic equipment is powered on, the first power supply circuit is connected with an external input power supply of +12V, the power supply outputting +3.3V in a voltage reduction mode is used for supplying power to the main control circuit, the second power supply circuit and the power supply state detection circuit, and at the moment, the second power supply circuit is switched to be supplied with power of +3.3V to supply power to the power supply state detection circuit.
The state reset input end CJ _ RES is connected with the main control circuit and is controlled by the main control circuit to input a state reset signal, when the electronic equipment needs to be maintained, in order to prevent the electronic equipment from giving an alarm, the state reset signal is controlled to be input to the disassembling state detection circuit through the main control circuit, the disassembling state detection circuit is enabled to output a low level, and therefore the main control circuit cannot determine that the machine is disassembled. The disassembly signal output end CJ _ DET is also connected with the main control circuit, and the main control circuit detects the level of the disassembly signal output end CJ _ DET.
Fig. 5 is a circuit diagram of the main control circuit of the present invention, as shown in fig. 5, the main control circuit includes: the main controller U1 is characterized in that a power supply pin on the main controller U1 is electrically connected with a first power supply, a state reset pin is electrically connected with a state reset input end CJ _ RES, and a disassembly signal output detection pin is electrically connected with a disassembly signal output end CJ _ DET. Specifically, the main controller U1 has a model AK3750, a power supply pin Vdd, a state reset pin PD2, and a power down signal output detection pin PD 1.
In this embodiment, the disconnecting detection switch K2 is a single-pole double-throw switch, the moving end contact is a first contact, the stationary end contact includes a second contact and a third contact, the first contact of the disconnecting detection switch K2 is connected to the disconnecting signal detection end CJ _ SW, the second contact of the disconnecting detection switch K2 is grounded, and the third contact of the disconnecting detection switch K2 is suspended.
When the disassembly detection switch K2 is not triggered, the first contact is connected with the third contact, the disassembly signal detection end CJ _ SW does not detect an illegal disassembly signal, the state reset input end CJ _ RES is at a high level, the first triode Q1, the second triode Q2 and the third triode Q3 are all conducted, and the disassembly signal output end CJ _ DET is at a low level.
When the disassembly detection switch K2 is triggered, the first contact is connected with the second contact, the disassembly signal detection end CJ _ SW detects an illegal disassembly signal, the disassembly signal detection end CJ _ SW is at a low level, the state reset input end CJ _ RES is at a high level, the first triode Q1, the second triode Q2 and the third triode Q3 are all cut off, and the disassembly signal output end CJ _ DET is at a high level.
In addition, it should be noted that, in the present invention, to prevent the current of the first power supply VCC from being inversely hung on the second power supply BAT _ OUT, the second diode D2 is added to the terminal of the second power supply BAT _ OUT.
Completely, a state reset input end CJ _ RES connected with the main control circuit is connected with an anode of a first diode D1, a cathode of a first diode D1 is connected with a first end of a fourth resistor R4, a second end of a fourth resistor R4 is connected with a first end of a sixth resistor R6, a first end of a second capacitor C2 and a first end of a seventh resistor R7, a second end of the second capacitor is grounded, a second end of the sixth resistor R6 is connected with an anode of a fifth diode D5, a cathode of a fifth diode D5 is connected with a first end of a disconnection signal detection end CJ _ SW, a second end of the disconnection signal detection end CJ _ SW is connected with a first contact of a disconnection detection switch K2, a second contact of the disconnection detection switch K2 is grounded, and a third floating contact of the disconnection detection switch K2; a second end of the seventh resistor R7 is connected to a first end of the ninth resistor R9 and a base of the second transistor Q2, a second end of the ninth resistor R9 is grounded, and an emitter of the second transistor Q2 is grounded;
the first power source VCC is connected with the anode of the second diode D2, the cathode of the second diode D2 is connected with the first end of the first capacitor C1 and the first end of the second resistor R2, the second power source BAT _ OUT is connected with the anode of the third diode D3, the cathode of the third diode D3 is connected with the cathode of the second diode D2, the first end of the third resistor R3 and the emitter of the first triode Q1, the second end of the first capacitor C1 is grounded, the second end of the second resistor R2 is connected with the collector of the second triode Q2, the second end of the third resistor R3 and the base of the first triode Q1 are connected with the first end of the fifth resistor R5, and the second end of the fifth resistor R5 is connected with the collector of the second triode Q2;
a collector of the first transistor Q1 is connected to a first terminal of the tenth resistor R10, an anode of the fourth diode D4, and a first terminal of the eighth resistor R8, a second terminal of the tenth resistor R10 is grounded, a cathode of the fourth diode D4 is connected to a cathode of the first diode D1, a second terminal of the eighth resistor R8 is connected to a base of the third transistor Q3, an emitter of the third transistor Q3 is grounded, a collector of the third transistor Q3 is connected to a first terminal of the first resistor R1 and a first terminal of the tear-down signal output terminal CJ _ DET, a second terminal of the tear-down signal output terminal CJ _ DET is connected to the main control circuit, and a second terminal of the first resistor R1 is connected to the first power source VCC.
In a second embodiment, the present invention further provides an electronic device, which includes a main body and the tamper detection control circuit described above.
Completely, before the electronic equipment leaves a factory, the state reset input end CJ _ RES connected with the main control circuit is at a high level, the base of the second triode Q2 is at a high level, the second triode Q2 is conducted, the base of the first triode Q1 is at a low level, the first triode Q1 is conducted, two ends of the eighth resistor R8 are at a high level, the third triode Q3 is conducted, and the shutdown signal output end CJ _ DET is at a low level.
After the electronic equipment leaves the factory and is powered off, the second power supply BAT _ OUT always keeps the power on the disassembly state detection circuit, the disassembly state detection circuit belongs to a self-locking state, and the disassembly signal output end CJ _ DET is at a low level.
When the main control circuit of the electronic equipment is not powered on, if the electronic equipment is illegally dismounted, the dismounting detection switch K2 is pressed down, the dismounting signal detection end CJ _ SW is at a low level, the fourth diode D4 and the fifth diode D5 have a pressure difference, the fourth diode D4 and the fifth diode D5 are conducted, the second power BAT _ OUT is pulled down through the base electrode of the second triode Q2 and is cut off, the base electrode of the first triode Q1 is at a high level, the first triode Q1 is cut off, the base electrode of the third triode Q3 is at a low level, the third triode Q3 is cut off, and the dismounting state detection circuit releases the locking state.
When the electronic equipment is powered on, the first power supply VCC supplies power to the disconnection state detection circuit and the main control circuit, the disconnection signal output end CJ _ DET is at a high level, the main control circuit detects that the disconnection signal output end CJ _ DET is at the high level, it is determined that the electronic equipment is disconnected, the main control circuit sends out a warning that the electronic equipment is disconnected or the electronic equipment is abnormally started, or the electronic equipment cannot be accessed, so that an illegal user cannot perform illegal operation on the electronic equipment, and the illegal operation comprises the following steps: control commands and parameters of the electronic device are modified.
When the electronic equipment is always powered on, the first power supply VCC supplies power to the tamper-proof detection control circuit and the main control circuit, if the electronic equipment is illegally tampered, the tamper detection switch K2 is pressed, the tamper signal detection end CJ _ SW is at a low level, the fourth diode D4 and the fifth diode D5 have a pressure difference, the fourth diode D4 and the fifth diode D5 are turned on, the second power supply BAT _ OUT is pulled down and cut off through the base of the second triode Q2, the base of the first triode Q1 is at a high level, the first triode Q1 is cut off, the base of the third triode Q3 is at a low level, the third triode Q3 is cut off, the tamper state detection circuit is unlocked, the tamper signal output end CJ _ DET is at a high level, the circuit detects that the tamper signal output end CJ _ DET is at a high level, it is determined that the electronic equipment is tampered, and the circuit sends a warning that the main control circuit is tampered or the electronic equipment is abnormally started, the electronic equipment can also be set to be inaccessible, so that an illegal user can not perform illegal operation on the electronic equipment, wherein the illegal operation comprises the following steps: control commands and parameters of the electronic device are modified.
Through implementing the utility model discloses following beneficial effect has:
the utility model discloses a prevent tearing open quick-witted detection control circuit with tear quick-witted detection switch open, this tear quick-witted detection switch open can be triggered when illegal user tears open the machine, the illegal signal of tearing open of output, tear quick-witted state detection circuit and detect after the illegal signal of tearing open, can change circuit state and export the data under the state of tearing open, main control circuit is according to the data under the state of tearing open, controlgear moves to effectively and detect illegal operation of tearing open in time, when detecting illegal operation of tearing open the machine, can send the warning that electronic equipment was demolishd or electronic equipment starts unusually, it can't be visited by illegal user to do to set up electronic equipment, make illegal user can't carry out illegal operation to electronic equipment.
The present invention has been described in terms of specific embodiments, and it will be understood by those skilled in the art that various changes may be made and equivalents may be substituted without departing from the scope of the invention. In addition, many modifications may be made to adapt a particular situation or material to the teachings of the invention without departing from its scope. Therefore, it is intended that the invention not be limited to the particular embodiment disclosed, but that the invention will include all embodiments falling within the scope of the appended claims.
Claims (9)
1. An anti-tamper detection control circuit, comprising: the disassembly detection switch K2, the disassembly state detection circuit and the main control circuit are electrically connected in sequence;
wherein, tear quick-witted state detection circuitry open includes: a state reset input end CJ _ RES connected with the main control circuit is connected with a sixth resistor R6 in a first way through a first diode D1 and a fourth resistor R4, a second way is grounded through a second capacitor C2, a third way is connected with a seventh resistor R7, the sixth resistor R6 is connected with a dismantling signal detection end CJ _ SW through a fifth diode D5, the dismantling signal detection end CJ _ SW is connected with a dismantling detection switch K2 capable of being triggered during illegal dismantling, a first way of the seventh resistor R7 is grounded through a ninth resistor R9, a second way is connected with a base electrode of a second triode Q2, and an emitting electrode of the second triode Q2 is grounded;
the first power supply VCC is connected to the cathode of the third diode D3 through the second diode D2 in a first path, grounded through the first capacitor C1 in a second path, and connected to the collector of the second triode Q2 through the second resistor R2 in the third path; a second power supply BAT _ OUT is connected to the emitter of the first triode Q1 through the third diode D3 in a first way, connected to the collector of the second triode Q2 through a third resistor R3 and a fifth resistor R5 in a second way, and connected to the base of the first triode Q1 through the third resistor R3 in a third way;
the first path of the collector of the first triode Q1 is grounded through a tenth resistor R10, the second path is connected to the cathode of the first diode D1 through a fourth diode D4, and the third path is connected to the base of a third triode Q3 through an eighth resistor R8;
the emitter of the third triode Q3 is grounded, the first path of the collector is connected to the first power source VCC through a first resistor R1, and the second path is connected to a trip signal output terminal CJ _ DET, which is connected to the main control circuit.
2. The tamper detection control circuit of claim 1, wherein the first transistor Q1 is a PNP transistor, and the second transistor Q2 and the third transistor Q3 are NPN transistors.
3. The tamper-resistant detection control circuit according to claim 1, wherein the first power source VCC is a +3.3V power supply source, and the second power source BAT _ OUT is an RTC power source.
4. The tamper detection control circuit of claim 1, wherein when the tamper detection switch K2 is not triggered, the tamper signal detection terminal CJ _ SW does not detect an illegal tamper signal, the state reset input CJ _ RES is high, the first transistor Q1, the second transistor Q2 and the third transistor Q3 are all turned on, and the tamper signal output CJ _ DET is low.
5. The tamper detection control circuit of claim 1, wherein the tamper signal detection terminal CJ _ SW detects an illegal tamper signal when the tamper detection switch K2 is activated, the tamper signal detection terminal CJ _ SW is at a low level, the state reset input terminal CJ _ RES is at a high level, the first transistor Q1, the second transistor Q2 and the third transistor Q3 are all turned off, and the tamper signal output terminal CJ _ DET is at a high level.
6. The tamper detection control circuit of claim 1, wherein the tamper detection switch K2 is a single pole double throw switch, the moving end contact is a first contact, and the stationary end contact comprises a second contact and a third contact;
a first contact of the dismantling detection switch K2 is connected to the dismantling signal detection terminal CJ _ SW, a second contact of the dismantling detection switch K2 is grounded, and a third contact of the dismantling detection switch K2 is suspended.
7. The tamper detection control circuit of claim 6, wherein the first contact is connected to the third contact when the tamper detection switch K2 is not activated; when the dismantling detection switch K2 is triggered, the first contact is connected to the second contact, and the dismantling signal detection end CJ _ SW is at a low level.
8. The tamper detection control circuit of claim 1, wherein the main control circuit comprises: and a power supply pin of the main controller U1 is electrically connected with the first power supply, a state reset pin is electrically connected with the state reset input end CJ _ RES, and a disassembly signal output detection pin is electrically connected with the disassembly signal output end CJ _ DET.
9. An electronic device comprising a main body, characterized by further comprising the tamper-proof detection control circuit according to any one of claims 1 to 8.
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| CN110456202A (en) * | 2019-08-23 | 2019-11-15 | 中控智慧(广东)科技有限公司 | A kind of tamper machine testing control circuit and electronic equipment |
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| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110456202A (en) * | 2019-08-23 | 2019-11-15 | 中控智慧(广东)科技有限公司 | A kind of tamper machine testing control circuit and electronic equipment |
| CN110456202B (en) * | 2019-08-23 | 2024-10-01 | 熵基科技(广东)有限公司 | Anti-disassembly machine detection control circuit and electronic equipment |
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Address after: 523000 Jinhe Industrial Zone, Yufeng Community, Zhangmu Town, Dongguan City, Guangdong Province Patentee after: Entropy based technology (Guangdong) Co., Ltd Address before: 523000 Jinhe Industrial Zone, Yufeng Community, Zhangmu Town, Dongguan City, Guangdong Province Patentee before: Central Control Wisdom (Guangdong) Technology Co.,Ltd. |
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