CN112634556A - Electronic device, detection method, detection device, storage medium, and computer device - Google Patents
Electronic device, detection method, detection device, storage medium, and computer device Download PDFInfo
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- G—PHYSICS
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- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/18—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength
- G08B13/181—Actuation by interference with heat, light, or radiation of shorter wavelength; Actuation by intruding sources of heat, light, or radiation of shorter wavelength using active radiation detection systems
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B13/00—Burglar, theft or intruder alarms
- G08B13/02—Mechanical actuation
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- H—ELECTRICITY
- H05—ELECTRIC TECHNIQUES NOT OTHERWISE PROVIDED FOR
- H05K—PRINTED CIRCUITS; CASINGS OR CONSTRUCTIONAL DETAILS OF ELECTRIC APPARATUS; MANUFACTURE OF ASSEMBLAGES OF ELECTRICAL COMPONENTS
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Abstract
The invention discloses electronic equipment, a detection method, a detection device, a storage medium and computer equipment, and relates to the technical field of electronics. The electronic equipment comprises a shell, a control circuit, an infrared emitting device and an infrared receiving device, wherein light-transmitting plates are arranged on the parts of the shell corresponding to the infrared emitting device and the infrared receiving device, and light-isolating plates are arranged between the infrared emitting device and the infrared receiving device; the control circuit is respectively connected with the infrared transmitting device and the infrared receiving device and used for controlling the infrared transmitting device to transmit a first modulation signal, receiving a second modulation signal through the infrared receiving device and determining whether the electronic equipment is in a disassembly state or not according to the matching relation between the second modulation signal and the first modulation signal. The electronic equipment has the advantages of simple structure, low cost, good anti-disassembly detection effect, no need of opening at the bottom, good waterproof and dustproof effects, and capability of effectively realizing the anti-disassembly function of the electronic equipment by matching with the detection method provided by the invention.
Description
Technical Field
The present invention relates to the field of electronic technologies, and in particular, to an electronic device, a detection method, a detection apparatus, a storage medium, and a computer device.
Background
Along with the continuous development of electronic technology, data security and equipment security receive more and more people's attention gradually, at present, for the purpose such as loss prevention and anti-theft, some electronic equipment have set up the anti-disassembly function, and these electronic equipment generally can not pull down after pasting to on the carrier, in case pull down, electronic equipment will make corresponding processing, for example send out the warning, damage the physical structure of self or make self can not normally work etc..
For example, as shown in fig. 1, in one conventional technical solution, a tamper-proof mechanical switch is disposed in an electronic device, a touch rod of the tamper-proof mechanical switch extends out from a bottom of the electronic device, so that when the electronic device is attached to a surface of a carrier, the touch rod is compressed, the switch is in a closed state (or an open state), and if the electronic device is detached from the surface of the carrier, the touch rod pops up, and a switch state of the switch is switched (from closed to open or from open to closed). Once the detection circuit in the electronic equipment detects the switching of the states, the electronic equipment can be judged to be in the disassembly state, and therefore the disassembly prevention function is achieved.
However, the above-mentioned mechanical anti-removal scheme has a great anti-removal leak, for example, if the blade or other objects are firstly extended to the bottom of the electronic device to press the touch rod before the electronic device is removed, so that the anti-removal mechanical switch cannot be bounced, the anti-removal function of the electronic device will fail, and in addition, the existing anti-removal scheme of the electronic device also has the problems that the touch rod of the anti-removal mechanical switch is easily broken due to multiple times of removal, and the opening of the touch rod causes poor waterproof and dustproof performance of the electronic device.
Disclosure of Invention
In view of this, the present application provides an electronic device, a detection method, a detection apparatus, a storage medium, and a computer device, and mainly aims to solve the technical problems that an existing electronic device detachment prevention scheme is prone to failure and has poor dustproof and waterproof performance.
According to a first aspect of the present invention, there is provided an electronic apparatus comprising a housing, a control circuit, an infrared emitting device, and an infrared receiving device, wherein,
the shell is provided with light-transmitting plates corresponding to the parts of the infrared emitting device and the infrared receiving device, and a light-isolating plate is arranged between the infrared emitting device and the infrared receiving device;
the control circuit is respectively connected with the infrared transmitting device and the infrared receiving device and used for controlling the infrared transmitting device to transmit a first modulation signal, receiving a second modulation signal through the infrared receiving device and determining whether the electronic equipment is in a disassembly state or not according to the matching relation between the second modulation signal and the first modulation signal.
Optionally, the first modulation signal is composed of a constant level signal and an oscillating square wave signal.
Optionally, the infrared emitting device includes an infrared emitting device, the infrared receiving device includes an infrared receiving device, and the light shielding plate is disposed between the infrared emitting device and the infrared receiving device.
Optionally, the light barrier extends to the housing.
Optionally, the infrared emitting device includes a light emitting driving circuit and an infrared emitting device, where the light emitting driving circuit is connected to the control circuit and the infrared emitting device respectively, and is configured to receive a first modulation signal sent by the control circuit and drive the infrared emitting device to emit an infrared signal through the first modulation signal.
Optionally, the light-emitting driving circuit includes a first pull-up resistor, a first current-limiting resistor, and a switching transistor, wherein one end of the first pull-up resistor is connected to the power supply terminal, and the other end of the pull-up resistor is connected to the anode of the infrared emitting device; one end of the first current-limiting resistor is connected with the control circuit, the other end of the first current-limiting resistor is connected with the base electrode of the switching triode, the emitting electrode of the switching triode is connected with the grounding end, and the collecting electrode of the switching triode is connected with the negative electrode of the infrared emitting device.
Optionally, the infrared emitting device is an infrared light emitting diode.
Optionally, the infrared receiving apparatus includes a receiving amplifier circuit and an infrared receiving device, where the receiving amplifier circuit is connected to the control circuit and the infrared receiving device respectively, and is configured to receive the infrared signal through the infrared receiving device, convert the infrared signal into a second modulation signal, and input the second modulation signal into the control circuit.
Optionally, the receiving amplifying circuit includes a signal receiving circuit, a signal isolating circuit and a signal amplifying circuit, wherein the signal receiving circuit is connected to an input terminal of the signal isolating circuit, an output terminal of the signal isolating circuit is connected to a control terminal of the signal amplifying circuit, and an output terminal of the signal amplifying circuit is connected to the control circuit; when the signal receiving circuit receives the infrared signal, the signal isolation circuit transmits the infrared signal to the signal amplification circuit, and the signal amplification circuit converts the infrared signal into a second modulation signal and inputs the second modulation signal into the control circuit.
Optionally, the signal receiving circuit includes a second pull-up resistor and a second current-limiting resistor, wherein one end of the second pull-up resistor is connected to the power supply terminal, and the other end of the second pull-up resistor is connected to the cathode of the infrared receiving device and the input terminal of the signal isolating circuit respectively; one end of the second current-limiting resistor is connected with the grounding end, and the other end of the second current-limiting resistor is connected with the anode of the infrared receiving device.
Optionally, the signal isolation circuit includes a coupling capacitor and a third pull-up resistor, wherein one end of the coupling capacitor is connected to the signal receiving circuit, the other end of the coupling capacitor is connected to the control end of the signal amplification circuit, and the end of the coupling capacitor connected to the signal amplification circuit is further connected to the power supply terminal through the third pull-up resistor.
Optionally, the signal amplifying circuit includes a field effect transistor, a third current limiting resistor, and a pull-down resistor, wherein a gate of the field effect transistor is connected to an output terminal of the signal isolating circuit, a source of the field effect transistor is connected to a power supply terminal, a drain of the field effect transistor is connected to the control circuit through the third current limiting resistor, and the control circuit is further connected to the ground terminal through the pull-down resistor.
Optionally, the infrared receiving device is an infrared photodiode.
Optionally, the electronic device further comprises a communication device, and the communication device is connected with the control circuit.
According to a second aspect of the present invention, there is provided a detection method, which can be applied to the electronic device according to any one of the above embodiments, the detection method including:
generating a first signal sequence;
converting the first signal sequence into a first modulation signal according to a preset modulation period, and transmitting the first modulation signal;
receiving a second modulation signal, and converting the second modulation signal into a second signal sequence according to a preset modulation period;
and determining whether the electronic equipment is in a detached state according to the matching relation between the second signal sequence and the first signal sequence.
Optionally, generating a first signal sequence includes: the first signal sequence is generated by a random algorithm, wherein the first signal sequence is a number sequence of a predetermined length consisting of a number 0 and a number 1.
Optionally, the first modulation signal is composed of a constant level signal and an oscillating square wave signal.
Optionally, converting the first signal sequence into a first modulation signal according to a preset modulation period, including: converting a digital 0 in the first signal sequence into a constant level signal with a preset modulation period, and converting a digital 1 in the first signal sequence into an oscillation square wave signal with the preset modulation period; or converting a digital 1 in the first signal sequence into a constant level signal with a preset modulation period, and converting a digital 0 in the first signal sequence into an oscillation square wave signal with the preset modulation period; a first modulation signal is generated based on the digital conversion result and the digital conversion order of the first signal sequence.
Optionally, converting the second modulation signal into a second signal sequence according to a preset modulation period includes: converting the non-oscillation square wave signal with the preset modulation period in the second modulation signal into a digital 0, and converting the oscillation square wave signal with the preset modulation period in the second modulation signal into a digital 1; or converting the non-oscillation square wave signal with the preset modulation period in the second modulation signal into a digital 1, and converting the oscillation square wave signal with the preset modulation period in the second modulation signal into a digital 0; and generating a second signal sequence according to the signal conversion result and the signal conversion sequence of the second modulation signal.
Optionally, before converting the second modulation signal into the second signal sequence according to the preset modulation period, the method further includes: configuring the signal receiving pins into an edge triggering mode, and judging whether the edge triggering quantity in each preset modulation period in the second modulation signal reaches a preset quantity or not; if the edge triggering number in the preset modulation period reaches the preset number, determining that the signal in the preset modulation period is an oscillation square wave signal; and if the edge triggering quantity in the preset modulation period does not reach the preset quantity, determining that the signal in the preset modulation period is a non-oscillation square wave signal.
Optionally, the oscillation frequency of the oscillating square wave signal is between 100hz and 100 khz.
Optionally, transmitting the first modulation signal includes: the first modulation signal is transmitted periodically.
Optionally, determining whether the electronic device is in a detached state according to a matching relationship between the second signal sequence and the first signal sequence includes: when the second signal sequence is the same as or corresponds to the first signal sequence, determining that the electronic equipment is in an undetached state; and when the second signal sequence is different from and does not correspond to the first signal sequence, determining that the electronic equipment is in a disassembly state.
Optionally, the method further includes: and if the electronic equipment is in the detached state, recording and transmitting the detached state of the electronic equipment.
According to a third aspect of the present invention, there is provided a detection apparatus comprising:
a signal generation module for generating a first signal sequence;
the signal modulation module is used for converting the first signal sequence into a first modulation signal according to a preset modulation period and transmitting the first modulation signal;
the signal demodulation module is used for receiving the second modulation signal and converting the second modulation signal into a second signal sequence according to a preset modulation period;
and the signal judgment module is used for determining whether the electronic equipment is in a disassembly state according to the matching relation between the second signal sequence and the first signal sequence.
According to a fourth aspect of the present invention, there is provided a storage medium having stored thereon a computer program which, when executed by a processor, implements the above-described detection method.
According to a fifth aspect of the present invention, there is provided a computer device comprising a memory, a processor and a computer program stored on the memory and executable on the processor, the processor implementing the detection method when executing the program.
The invention provides an electronic device, a detection method, a detection device, a storage medium and a computer device, wherein the electronic device comprises a shell, a control circuit, an infrared emitting device and an infrared receiving device, the control circuit is respectively connected with the infrared emitting device and the infrared receiving device, the control circuit can emit a first modulation signal through the infrared emitting device and receive a second modulation signal through the infrared receiving device, and then determines whether the electronic device is in a disassembly state according to the matching relation between the two signals, so as to realize the disassembly prevention function of the electronic device, in the electronic device, the shell is provided with a light-transmitting plate corresponding to the infrared emitting device and the infrared receiving device, the infrared receiving device can receive an infrared signal which is reflected back through the surface of a carrier after being emitted by the infrared emitting device through the light-transmitting plate, and a light-isolating plate is arranged between the infrared emitting device and the infrared receiving device, the modulated signal transmitted by the infrared transmitting means and the modulated signal received by the infrared receiving means may be separated. The electronic equipment is simple in structure, low in cost, good in anti-disassembly detection effect, free of opening at the bottom and good in waterproof and dustproof effects.
Further, the detection method provided by the present invention may be applied to the electronic device, and the detection method modulates the generated signal sequence into the first modulation signal according to a preset modulation period, demodulates the second modulation signal into the second signal sequence according to the preset modulation period, and determines whether the electronic device is in a detached state according to a matching relationship between the second signal sequence and the first signal sequence. The method can effectively improve the safety of signal detection and prevent the detection signal from being forged by signal modulation and signal demodulation, is simple and effective, and can effectively realize the anti-disassembly function of the electronic equipment by matching with the electronic equipment.
The foregoing description is only an overview of the technical solutions of the present application, and the present application can be implemented according to the content of the description in order to make the technical means of the present application more clearly understood, and the following detailed description of the present application is given in order to make the above and other objects, features, and advantages of the present application more clearly understandable.
Drawings
The accompanying drawings, which are included to provide a further understanding of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the invention without limiting the invention. In the drawings:
fig. 1 illustrates a schematic structural diagram of an electronic device in the prior art according to an embodiment of the present invention;
fig. 2 is a schematic structural diagram of an electronic device according to an embodiment of the present invention;
fig. 3 is a schematic waveform diagram of a first modulation signal according to an embodiment of the present invention;
fig. 4 is a schematic structural diagram of another electronic device provided in an embodiment of the present invention;
fig. 5 is a schematic circuit diagram illustrating a light-emitting driving circuit of an electronic device according to an embodiment of the present invention;
fig. 6 is a schematic circuit diagram illustrating a light-emitting driving circuit of another electronic device according to an embodiment of the present invention;
fig. 7 is a schematic circuit connection diagram of a receiving and amplifying circuit of an electronic device according to an embodiment of the present invention;
FIG. 8 is a flow chart of a detection method according to an embodiment of the present invention;
fig. 9 is a schematic structural diagram of a detection apparatus according to an embodiment of the present invention.
Detailed Description
The invention will be described in detail hereinafter with reference to the accompanying drawings in conjunction with embodiments. It should be noted that the embodiments and features of the embodiments in the present application may be combined with each other without conflict.
In one embodiment, as shown in fig. 2, there is first provided an electronic apparatus including a housing, a control circuit, an infrared emitting device, and an infrared receiving device, wherein a portion of the housing corresponding to the infrared emitting device and the infrared receiving device is provided with a light-transmitting plate, and a light-blocking plate is provided between the infrared emitting device and the infrared receiving device; the control circuit is respectively connected with the infrared transmitting device and the infrared receiving device and used for controlling the infrared transmitting device to transmit a first modulation signal, receiving a second modulation signal through the infrared receiving device and determining whether the electronic equipment is in a disassembly state or not according to the matching relation between the second modulation signal and the first modulation signal.
Specifically, referring to fig. 2, after the electronic device is powered on, the control circuit may generate a first modulation signal, and transmit the first modulation signal through the infrared emitting device, where the first modulation signal may be emitted from a transparent plate of the housing corresponding to the infrared emitting device and irradiate the outside of the housing. If the electronic equipment is attached to the surface of the carrier, the first modulation signal can be irradiated to the surface of the carrier and is reflected to the inside of the shell again through the light-transmitting plate corresponding to the infrared receiving device, so that the first modulation signal is received by the infrared receiving device; if the electronic device is not attached to the surface of the carrier, the first modulation signal is dispersed in the air, and at this time, a small part of reflected light may be reflected back to the inside of the housing through the light-transmitting plate, but the reflected light signal is very weak and is difficult to be received by the infrared receiving device, and even if the infrared receiving device can receive the reflected light signal, a part of signal fragments may be lost. In addition, the infrared transmitting device transmits modulated signals, the signal complexity is much higher than that of common signals, the communication safety is further improved, the electronic equipment cannot be interfered by natural light signals, and the electronic equipment cannot receive complete modulated signals after leaving the surface of the carrier.
Further, when the control circuit judges that the second modulation signal received by the infrared receiving device and the first modulation signal transmitted by the infrared transmitting device have a matching relationship, it can be determined that the electronic equipment is in an undetached (mounted) state; when the control circuit judges that the second modulation signal does not have the matching relation with the first modulation signal, the electronic equipment can be determined to be in a disassembly state, and therefore the disassembly prevention function of the electronic equipment is achieved. In this embodiment, the matching relationship may specifically mean that each bit signal of the second modulation signal is the same as or corresponds to the first modulation signal, for example, when the first modulation signal is 010110, if the second modulation signal is also 010110, or the second modulation signal is 101001, it may be considered that the second modulation signal and the first modulation signal have a matching relationship therebetween, and it is determined that the electronic device is in an undetached state.
Furthermore, in terms of structural relationship, the light-transmitting plate corresponding to the infrared emitting device and the infrared receiving device may be a complete light-transmitting plate, or two light-transmitting plates independent of each other. It should be noted that the transparent plate needs to be arranged corresponding to the infrared emitting device and the infrared receiving device, respectively, so that the infrared light emitted by the infrared emitting device can be received by the infrared receiving device after being emitted through the surface of the carrier. In addition, the light-blocking plate needs to be arranged between the infrared emitting device and the infrared receiving device, and can completely separate infrared light emitted by the infrared emitting device from infrared light received by the infrared receiving device, so that the infrared receiving device cannot directly receive the infrared light emitted by the infrared emitting device in the shell.
The electronic device provided by the embodiment comprises a shell, a control circuit, an infrared transmitting device and an infrared receiving device, wherein the control circuit is respectively connected with the infrared transmitting device and the infrared receiving device, the control circuit can transmit a first modulation signal through the infrared transmitting device and receive a second modulation signal through the infrared receiving device, then determining whether the electronic equipment is in a disassembly state according to the matching relationship between the two signals so as to realize the disassembly prevention function of the electronic equipment, in the electronic apparatus, a portion of the casing corresponding to the infrared emitting means and the infrared receiving means is provided with a light-transmitting plate, through the light-transmitting plate, the infrared receiving device can receive the infrared signal reflected by the surface of the carrier after being transmitted by the infrared transmitting device, and a light-isolating plate is arranged between the infrared transmitting device and the infrared receiving device, and can isolate the modulation signal transmitted by the infrared transmitting device from the modulation signal received by the infrared receiving device. The electronic equipment is simple in structure, low in cost, good in anti-disassembly detection effect, free of opening at the bottom and good in waterproof and dustproof effects.
In one embodiment, the first modulation signal may be composed of a constant level signal and an oscillating square wave signal. Specifically, the first modulation signal may be emitted into the air medium through the infrared emission device after being generated by the control circuit, and the form of the first modulation signal may be various, and this embodiment only proposes one of them. In this embodiment, the digital signals "0" and "1" can be represented by a constant level signal and an oscillating square wave signal, respectively, for example, a digital "0" can be modulated into a constant level signal, a digital "1" can be modulated into an oscillating square wave signal, or a digital "1" can be modulated into a constant level signal, and a digital "0" can be modulated into an oscillating square wave signal, for example, the digital signal 010110 can be modulated into a modulation signal composed of a constant level signal and an oscillating square wave signal as shown in fig. 3. It should be noted that the oscillation frequency of the oscillation square wave signal is related to circuit parameters, and generally may be between several hundred hertz and several thousand hertz, and the constant level signal may be a high level signal or a low level signal.
According to the embodiment, the first modulation signal consisting of the constant level signal and the oscillation square wave signal is transmitted, the infrared signal with high safety can be obtained in a very simple mode, and adverse factors such as natural light interference are effectively eliminated.
In one embodiment, as shown in fig. 4, the infrared emitting device includes an infrared emitting device, the infrared receiving device includes an infrared receiving device, and the light blocking plate is disposed between the infrared emitting device and the infrared receiving device. Specifically, infrared emitter need pass through infrared emitter transmission infrared light signal, infrared receiver then needs receive infrared light signal through infrared receiver, consequently, infrared emitter and infrared receiver are the two devices that are the most sensitive to infrared light signal among the electronic equipment, based on this, the setting of light baffle is the preferred mode of setting between infrared emitter and infrared receiver, such mode of setting can be kept apart infrared light and the infrared light that infrared receiver received the infrared light that infrared receiver transmitted completely with infrared emitter transmission, thereby make infrared receiver can't be in the inside infrared light of direct receipt infrared emitter transmission of casing, infrared light signal's isolation effect has been strengthened.
In one embodiment, as shown in fig. 4, a light-shielding plate disposed between the infrared emitting device and the infrared receiving device may extend to the housing. Specifically, the light isolating plate extends to the shell from the position between the infrared emitting device and the infrared receiving device, so that infrared light emitted by the infrared emitting device and infrared light received by the infrared receiving device can be isolated more thoroughly, and the isolation effect of an infrared light signal is better.
In one embodiment, as shown in fig. 4, the infrared emitting device may include a light emitting driving circuit and an infrared emitting device, where the light emitting driving circuit is connected to the control circuit and the infrared emitting device, respectively, on one hand, the light emitting driving circuit needs to receive a first modulation signal sent by the control circuit, and on the other hand, the light emitting driving circuit further needs to drive the infrared emitting device to emit an infrared signal through the received first modulation signal, and in this way, the infrared emitting device may convert the first modulation signal into an infrared light signal and successfully emit the infrared light signal into an air medium.
In one embodiment, a circuit connection manner of the light emitting driving circuit of the infrared emitting device may be as shown in fig. 5, wherein the light emitting driving circuit may include a first pull-up resistor R1, a first current limiting resistor R2 and a switching transistor Q1, wherein one end of the first pull-up resistor R1 is connected to a power supply terminal, and the other end of the first pull-up resistor R1 is connected to the anode of the infrared emitting device D1; one end of the first current-limiting resistor R2 is connected to the control circuit, the other end of the first current-limiting resistor R2 is connected to the base of the switching transistor Q1, the emitter of the switching transistor Q1 is connected to the ground, and the collector of the switching transistor Q1 is connected to the cathode of the infrared emitting device D1.
In the above embodiment, the switching transistor Q1 is an NPN transistor, and when the control circuit outputs a high level signal, the switching transistor Q1 is turned on, and the infrared emitting device D1 emits infrared light; when the control circuit outputs a low level signal, the switching triode Q1 is cut off, and the infrared emitting device D1 does not emit infrared light; when the control circuit outputs a square wave oscillation signal, the switching transistor Q1 is switched on and off continuously, and the infrared emitting device D1 emits infrared light continuously flickers. In this way, the light-emitting driving circuit can convert various signals sent by the control circuit, such as a high level signal, a low level signal and a square wave oscillation signal, into various types of infrared light signals and emit the infrared light signals.
In one embodiment, another circuit connection manner of the light-emitting driving circuit of the infrared emitting device may be as shown in fig. 6, wherein the light-emitting driving circuit includes two current-limiting resistors R1 and R2, and further includes a switching transistor Q1, wherein an emitter of the switching transistor Q1 is connected to a power supply terminal, a collector of the switching transistor Q1 is connected to an anode of the infrared emitting device D1, a base of the switching transistor Q1 is connected to one end of the current-limiting resistor R2, and the other end of the current-limiting resistor R2 is connected to the control circuit; one end of the current limiting resistor R1 is connected with the ground terminal, and the other end of the current limiting resistor R1 is connected with the cathode of the infrared emitting device D1.
In the above embodiment, the switching transistor Q1 is a PNP transistor, and when the control circuit outputs a high level signal, the switching transistor Q1 is turned off, and the infrared emitting device D1 does not emit infrared light; when the control circuit outputs a low level signal, the switching triode Q1 is conducted, and the infrared emitting device D1 emits infrared light; when the control circuit outputs a square wave oscillation signal, the switching transistor Q1 is switched on and off continuously, and the infrared emitting device D1 emits infrared light continuously flickers. In this way, the light-emitting driving circuit can convert various signals sent by the control circuit, such as a high level signal, a low level signal and a square wave oscillation signal, into various types of infrared light signals and emit the infrared light signals.
In one embodiment, as shown in fig. 5 and 6, the infrared emitting device may be an infrared light emitting diode. Specifically, the infrared light emitting diode has the advantages of low cost and low energy consumption, and the connection mode of the infrared light emitting diode is simpler, so that the design difficulty and the manufacturing cost of a circuit can be effectively reduced. It is understood that in other embodiments, the infrared emitting device may be implemented with other components.
In one embodiment, as shown in fig. 4, the infrared receiving apparatus may include a receiving amplifying circuit and an infrared receiving device, wherein the receiving amplifying circuit is connected to the control circuit and the infrared receiving device, respectively, on one hand, the receiving amplifying circuit is to receive the infrared signal through the infrared receiving device, and on the other hand, the receiving amplifying circuit is to convert the infrared signal into a second modulation signal and input the second modulation signal to the control circuit. Through this kind of mode, infrared emitter can convert infrared light signal into second modulation signal to in inputing second modulation signal to control circuit, make control circuit can judge the first modulation signal of launching and the second modulation signal that receives, thereby confirm whether electronic equipment is in the dismantlement state.
In one embodiment, as shown in fig. 7, the receiving amplifying circuit includes a signal receiving circuit, a signal isolating circuit and a signal amplifying circuit, wherein the signal receiving circuit is connected to an input terminal of the signal isolating circuit, an output terminal of the signal isolating circuit is connected to a control terminal of the signal amplifying circuit, and an output terminal of the signal amplifying circuit is connected to the control circuit; when the signal receiving circuit receives the infrared signal, the signal isolation circuit transmits the infrared signal to the signal amplification circuit, and the signal amplification circuit converts the infrared signal into a second modulation signal and inputs the second modulation signal into the control circuit.
In one embodiment, as shown in fig. 7, the signal receiving circuit includes a second pull-up resistor R1 and a second current limiting resistor R5, wherein one end of the second pull-up resistor R1 is connected to the power supply terminal, and the other end of the second pull-up resistor R1 is connected to the cathode of the infrared receiving device and the input terminal of the signal isolating circuit, respectively; one end of the second current limiting resistor R5 is connected with the ground terminal, and the other end of the second current limiting resistor R5 is connected with the anode of the infrared receiving device.
In the above embodiment, when the infrared receiver device receives the infrared light signal, the voltage value at the output end of the signal receiving circuit is a low level signal; when the infrared receiver does not receive the infrared light signal, the voltage value of the output end of the signal receiving circuit is a high-level signal; when the infrared receiving device receives an infrared light signal which continuously flickers, the voltage value at the output end of the signal receiving circuit is an oscillating level signal, that is, when the infrared receiving device receives a constant infrared light signal, the voltage value at the point a in fig. 7 is kept constant; when the infrared receiving device receives an oscillating infrared light signal, the voltage value at the point a in fig. 7 oscillates, and in this way, the signal receiving circuit can convert the received infrared light signal into a voltage signal and transmit the voltage signal to the signal isolating circuit.
In one embodiment, as shown in fig. 7, the signal isolation circuit includes a coupling capacitor C1 and a third pull-up resistor R2, wherein one end of the coupling capacitor C1 is connected to the signal receiving circuit, the other end of the coupling capacitor C1 is connected to the control terminal of the signal amplification circuit, and the end of the coupling capacitor C1 connected to the signal amplification circuit is further connected to the power supply terminal through the third pull-up resistor R2.
In the above embodiment, when the voltage value at the output terminal of the signal receiving circuit is a constant level signal, the voltage at the output terminal of the signal isolating circuit will be kept at a high level by the third pull-up resistor R2; when the voltage value of the output end of the signal receiving circuit is an oscillating level signal, the voltage of the output end of the signal isolation circuit can output the oscillating level signal under the action of the coupling capacitor, and the signal isolation circuit can effectively transmit the received level signal to the signal amplification circuit in such a way.
In one embodiment, as shown in fig. 7, the signal amplifying circuit includes a fet Q1, a third current limiting resistor R4, and a pull-down resistor R3, wherein the gate of the fet Q1 is connected to the output terminal of the signal isolating circuit, the source of the fet Q1 is connected to the power supply terminal, the drain of the fet Q1 is connected to the control circuit through the third current limiting resistor R4, and the control circuit is further connected to the ground terminal through the pull-down resistor R3.
In the above embodiment, when the voltage value at the output end of the signal isolation circuit is a high level signal, the field effect transistor is turned off, the signal amplification circuit outputs a low level signal, and the control circuit receives the low level signal; when the voltage value of the output end of the signal isolation circuit is an oscillating level signal, the field effect transistor is switched between on and off continuously, the signal amplification circuit outputs the oscillating level signal, and the control circuit receives the oscillating level signal. In this way, the signal amplification circuit can amplify the original infrared light signal into a level signal which can be received by the control circuit, and transmit the effective infrared light signal to the control signal, so that the control circuit can perform corresponding operation.
In one embodiment, as shown in FIG. 7, the infrared receiving device is an infrared photodiode. Specifically, the infrared photodiode has the advantages of low cost and low energy consumption, and the connection mode of the infrared photodiode is simple, so that the design difficulty and the manufacturing cost of the circuit can be effectively reduced. It is understood that in other embodiments, the infrared receiving device may be implemented by using other components.
In one embodiment, the electronic device further comprises a communication device, wherein the communication device is connected to the control circuit and is operable to emit a communication signal. Specifically, the control circuit may send out a communication signal, an alarm signal, and the like through the communication device. For example, when the electronic device is in an undetached state, the main control circuit may send an undetached state signal through the communication device; when the electronic equipment is in a disassembly state, the main control circuit can send out a disassembly state signal and an alarm signal through the communication device. In addition, the control circuit may also record time information, position information and other related information of the occurrence of the detachment state, or the control circuit may also perform data protection operations such as clearing the memory and chip self-destruction, and the specific operation of the control circuit is not specifically limited in this embodiment and may be determined according to actual conditions. In the present embodiment, the communication device may specifically be a wireless communication device, such as a WIFI communication device, a bluetooth communication device, a UWB communication device, and the like. Through the communication device, a user can know the working state of the electronic equipment in time, so that corresponding treatment is performed.
In an embodiment, as shown in fig. 8, a detection method is provided, which is described by way of example when the method is applied to a control circuit of an electronic device according to any one of the above embodiments, and includes the following steps:
101. a first signal sequence is generated.
102. And converting the first signal sequence into a first modulation signal according to a preset modulation period, and transmitting the first modulation signal.
103. And receiving the second modulation signal, and converting the second modulation signal into a second signal sequence according to a preset modulation period.
104. And determining whether the electronic equipment is in a detached state according to the matching relation between the second signal sequence and the first signal sequence.
Specifically, the control circuit may generate the first signal sequence by random or preset value, wherein, the first signal sequence may be a series of serial numbers consisting of numbers, and then, the control circuit may control the first signal sequence according to a preset modulation period, modulating the first signal sequence to obtain a first modulated signal, and then the control circuit can transmit the first modulated signal through the signal transmission pin and wait for receiving a second modulated signal, if the control circuit receives the second modulation signal, the second modulation signal is demodulated according to the modulation rule of the first modulation signal, to obtain a second signal sequence, and finally, the control circuit will compare the second signal sequence with the first signal sequence, if the second signal sequence and the first signal sequence have a matching relationship, determining that the electronic equipment is in an undetached state; and if the second signal sequence does not have a matching relation with the first signal sequence, determining that the electronic equipment is in a disassembly state, so as to realize the disassembly prevention function of the electronic equipment.
In this embodiment, the matching relationship may specifically mean that each bit signal of the second signal sequence is the same as or corresponds to the first signal sequence, for example, when the first signal sequence is 010110, if the second signal sequence is also 010110, or the second signal sequence is 101001, it may be considered that the second signal sequence and the first signal sequence have a matching relationship therebetween, and it is determined that the electronic device is in an undetached state.
According to the detection method provided by the embodiment, the generated signal sequence is modulated into the first modulation signal according to the preset modulation period, then the second modulation signal is demodulated into the second signal sequence according to the preset modulation period, and finally whether the electronic equipment is in the disassembly state is determined according to the matching relation between the second signal sequence and the first signal sequence.
In an embodiment, the method for generating the first signal sequence in step 101 may specifically be implemented by: the first signal sequence is generated by a random algorithm, wherein the first signal sequence is a number sequence of a predetermined length consisting of a number 0 and a number 1. Specifically, the signal sequence generated by the random algorithm has higher anti-counterfeiting performance and higher safety, and the anti-disassembly function of the electronic equipment can be effectively improved, in addition, the first signal sequence consists of a digital 0 and a digital 1, and the first signal sequence has a preset length, so that the signal can be modulated more conveniently, namely when the signal is modulated, the digital 0 is modulated into one signal, and the digital 1 is modulated into another signal.
In one embodiment, the first modulation signal is comprised of a constant level signal and an oscillating square wave signal, as shown in fig. 3. Specifically, the form of the first modulation signal may be various, and the present embodiment only proposes one of them. In this embodiment, the numbers 0 and 1 can be represented by a constant level signal and an oscillating square wave signal, respectively, for example, the number 0 can be modulated into a constant level signal, and the number 1 can be modulated into an oscillating square wave signal, or the number 1 can be modulated into a constant level signal and the number 0 can be modulated into an oscillating square wave signal, for example, the number 010110 can be modulated into a modulation signal composed of a constant level signal and an oscillating square wave signal as shown in fig. 3. It should be noted that the oscillation frequency of the oscillation square wave signal is related to circuit parameters, and generally may be between several hundred hertz and several thousand hertz, and the constant level signal may be a high level signal or a low level signal.
In an embodiment, the method for converting the first signal sequence into the first modulation signal in step 102 may specifically include the following steps: firstly, converting a digital 0 in a first signal sequence into a constant level signal with a preset modulation period, and converting a digital 1 in the first signal sequence into an oscillation square wave signal with the preset modulation period, or converting a digital 1 in the first signal sequence into a constant level signal with the preset modulation period, and converting a digital 0 in the first signal sequence into an oscillation square wave signal with the preset modulation period, and finally generating a first modulation signal according to a digital conversion result and a digital conversion sequence of the first signal sequence. In this way, the efficiency of signal modulation can be improved, and it is noted that the rule of signal modulation needs to correspond to the rule of signal demodulation.
In an embodiment, the method for converting the second modulation signal into the second signal sequence in step 103 may specifically include the following steps: firstly, a non-oscillation square wave signal with a preset modulation period in a second modulation signal is converted into a digital 0, an oscillation square wave signal with the preset modulation period in the second modulation signal is converted into a digital 1, or the non-oscillation square wave signal with the preset modulation period in the second modulation signal is converted into the digital 1, the oscillation square wave signal with the preset modulation period in the second modulation signal is converted into the digital 0, and finally, a second signal sequence is generated according to a signal conversion result and a signal conversion sequence of the second modulation signal. In this embodiment, the demodulation process of the second modulation signal needs to correspond to the modulation process of the first modulation signal, so as to ensure the accuracy of signal demodulation.
In an embodiment, before converting the second modulation signal into the second signal sequence in step 103, the detection method may further include the following steps: firstly configuring a signal receiving pin into an edge triggering mode, then judging whether the edge triggering quantity in each preset modulation period in a second modulation signal reaches a preset quantity, and if the edge triggering quantity in one modulation period reaches the preset quantity, determining that the signal in the modulation period is an oscillation square wave signal; and if the edge triggering quantity in one modulation period does not reach the preset quantity, determining that the signal in the modulation period is a non-oscillation square wave signal. The signal type can be conveniently and rapidly judged by counting the edge triggering number in the modulation period, and the method has low restrictive requirement on the frequency of the oscillation method signal and high judgment accuracy.
In one embodiment, the oscillating square wave signal has an oscillation frequency between 100hz and 100 khz. The oscillation frequency of the oscillation square wave signal is related to circuit parameters, and the oscillation frequency of the oscillation signal is not specifically limited in this embodiment, that is, the oscillation frequency of the oscillation signal may be determined according to actual situations.
In one embodiment, the step 102 of transmitting the first modulation signal may specifically be transmitting the first modulation signal periodically, where the transmission period may be set or adjusted according to actual situations. The first modulation signal is periodically transmitted, so that the electric quantity of the electronic equipment can be saved, and the cruising ability of the electronic equipment is improved.
In an embodiment, the method for determining whether the electronic device is in the detached state in step 104 may specifically include the following steps: when the second signal sequence is the same as or corresponds to the first signal sequence, determining that the electronic equipment is in an undetached state; and when the second signal sequence is not the same as the first signal sequence and does not correspond to the first signal sequence, determining that the electronic equipment is in a disassembly state. Specifically, the second signal sequence is identical to the first signal sequence, which means that each bit signal of the second signal sequence is identical to the first signal sequence, and the second signal sequence is opposite to the first signal sequence. It should be noted that, whether the second signal sequence is the same as or is related to the actual circuit connection relationship correspondingly with the first signal sequence, and therefore, whether the second signal sequence is the same as or is determined correspondingly with the first signal sequence needs to be determined according to the actual circuit connection relationship, which is not specifically limited in this embodiment.
In one embodiment, the detection method further includes the following steps: if the electronic equipment is in the disassembly state, the disassembly state of the electronic equipment is recorded and sent, such as a disassembly state signal and an alarm signal. In addition, when the electronic device is in the detached state, the control circuit may further record time information, position information and other related information that occurs in the detached state, or may further perform data protection operations such as clearing the memory and chip self-destruction, and for the specific operation of the control circuit, this embodiment is not specifically limited, and may be determined according to actual conditions. In this way, the user can know the working state of the electronic equipment in a more timely manner, so that corresponding treatment is performed.
Further, as a specific implementation of the method shown in fig. 8, the present embodiment provides a detection apparatus, as shown in fig. 9, the apparatus includes: a signal generating module 31, a signal modulating module 32, a signal demodulating module 33 and a signal judging module 34.
A signal generation module 31 operable to generate a first signal sequence;
the signal modulation module 32 is configured to convert the first signal sequence into a first modulation signal according to a preset modulation period, and transmit the first modulation signal;
the signal demodulation module 33 is configured to receive the second modulation signal, and convert the second modulation signal into a second signal sequence according to a preset modulation period;
and the signal judging module 34 is configured to determine whether the electronic device is in a detached state according to a matching relationship between the second signal sequence and the first signal sequence.
In a specific application scenario, the signal generating module 31 is specifically configured to generate a first signal sequence by a random algorithm, where the first signal sequence is a digital sequence with a predetermined length and composed of a number 0 and a number 1.
In a specific application scenario, the first modulation signal emitted by the signal modulation module 32 is composed of a constant level signal and an oscillating square wave signal.
In a specific application scenario, the signal modulation module 32 may be specifically configured to convert a digital 0 in the first signal sequence into a constant level signal with a preset modulation period, and convert a digital 1 in the first signal sequence into an oscillating square wave signal with the preset modulation period; or converting a digital 1 in the first signal sequence into a constant level signal with a preset modulation period, and converting a digital 0 in the first signal sequence into an oscillation square wave signal with the preset modulation period; a first modulation signal is generated based on the digital conversion result and the digital conversion order of the first signal sequence.
In a specific application scenario, the signal demodulation module 33 may be specifically configured to convert a non-oscillating square wave signal with a preset modulation period in the second modulation signal into a digital 0, and convert an oscillating square wave signal with a preset modulation period in the second modulation signal into a digital 1; or converting the non-oscillation square wave signal with the preset modulation period in the second modulation signal into a digital 1, and converting the oscillation square wave signal with the preset modulation period in the second modulation signal into a digital 0; and generating a second signal sequence according to the signal conversion result and the signal conversion sequence of the second modulation signal.
In a specific application scenario, the signal demodulation module 33 may be further configured to configure the signal receiving pin to be in an edge triggering mode, and determine whether the number of edge triggers in each preset modulation period in the second modulation signal reaches a preset number; if the edge triggering number in the preset modulation period reaches the preset number, determining that the signal in the preset modulation period is an oscillation square wave signal; and if the edge triggering quantity in the preset modulation period does not reach the preset quantity, determining that the signal in the preset modulation period is a non-oscillation square wave signal.
In a specific application scenario, the oscillation frequency of the oscillating square wave signal is between 100hz and 100 khz.
In a specific application scenario, the signal modulation module 32 may be further configured to periodically transmit the first modulation signal.
In a specific application scenario, the signal determining module 34 is specifically configured to determine that the electronic device is in an undetached state when the second signal sequence is the same as or corresponds to the first signal sequence; and when the second signal sequence is different from and does not correspond to the first signal sequence, determining that the electronic equipment is in a disassembly state.
In a specific application scenario, the apparatus further includes a signal recording module 35, where the signal recording module 35 is configured to record and send a detachment state of the electronic device if the electronic device is in the detachment state.
It should be noted that other corresponding descriptions of the functional units related to the detection apparatus provided in this embodiment may refer to the corresponding descriptions of the related embodiments of the test method, and are not described herein again.
Based on the method shown in fig. 8, correspondingly, the present embodiment further provides a storage medium, on which a computer program is stored, and the computer program, when executed by a processor, implements the detection method shown in fig. 8.
Based on such understanding, the technical solution of the present application may be embodied in the form of a software product, and the software product to be identified may be stored in a non-volatile storage medium (which may be a CD-ROM, a usb disk, a removable hard disk, or the like), and include several instructions for enabling a computer device (which may be a personal computer, a server, or a network device) to execute the method according to the implementation scenarios of the present application.
Based on the method shown in fig. 8 and the embodiment of the detection apparatus shown in fig. 9, in order to achieve the above object, this embodiment further provides a detected entity device, which may specifically be a personal computer, a server, a smart phone, a tablet computer, a smart watch, or other network devices, and the entity device includes a storage medium and a processor; a storage medium for storing a computer program; a processor for executing a computer program to implement the method as described above and illustrated in fig. 8.
Optionally, the entity device may further include a user interface, a network interface, a camera, a Radio Frequency (RF) circuit, a sensor, an audio circuit, a WI-FI module, and the like. The user interface may include a Display screen (Display), an input unit such as a keypad (Keyboard), etc., and the optional user interface may also include a USB interface, a card reader interface, etc. The network interface may optionally include a standard wired interface, a wireless interface (e.g., WI-FI interface), etc.
It will be understood by those skilled in the art that the structure of a detected physical device provided in the present embodiment does not constitute a limitation to the physical device, and may include more or less components, or some components in combination, or a different arrangement of components.
The storage medium may further include an operating system and a network communication module. The operating system is a program for managing the hardware of the above-mentioned entity device and the software resources to be identified, and supports the operation of the information processing program and other software and/or programs to be identified. The network communication module is used for realizing communication among components in the storage medium and communication with other hardware and software in the information processing entity device.
Through the above description of the embodiments, those skilled in the art will clearly understand that the present application can be implemented by software plus a necessary general hardware platform, and can also be implemented by hardware. By applying the technical scheme of the application, the generated signal sequence is firstly modulated into a first modulation signal according to a preset modulation period, then a second modulation signal is demodulated into a second signal sequence according to the preset modulation period, and finally whether the electronic equipment is in a disassembly state or not is determined according to the matching relation between the second signal sequence and the first signal sequence. Compared with the prior art, the method can effectively improve the safety of signal detection through signal modulation and signal demodulation, prevent the detection signal from being forged, is simple and effective, and can effectively realize the anti-disassembly function of the electronic equipment by matching with the electronic equipment.
Those skilled in the art will appreciate that the figures are merely schematic representations of one preferred implementation scenario and that the blocks or flow diagrams in the figures are not necessarily required to practice the present application. Those skilled in the art will appreciate that the modules in the devices in the implementation scenario may be distributed in the devices in the implementation scenario according to the description of the implementation scenario, or may be located in one or more devices different from the present implementation scenario with corresponding changes. The modules of the implementation scenario may be combined into one module, or may be further split into a plurality of sub-modules.
The above application serial numbers are for description purposes only and do not represent the superiority or inferiority of the implementation scenarios. The above disclosure is only a few specific implementation scenarios of the present application, but the present application is not limited thereto, and any variations that can be made by those skilled in the art are intended to fall within the scope of the present application.
Claims (10)
1. An electronic device comprising a housing, a control circuit, an infrared emitting device and an infrared receiving device, wherein,
a light-transmitting plate is arranged on the part of the shell corresponding to the infrared emitting device and the infrared receiving device, and a light-isolating plate is arranged between the infrared emitting device and the infrared receiving device;
the control circuit is respectively connected with the infrared transmitting device and the infrared receiving device and used for controlling the infrared transmitting device to transmit a first modulation signal, receiving a second modulation signal through the infrared receiving device and determining whether the electronic equipment is in a disassembly state according to the matching relation between the second modulation signal and the first modulation signal.
2. The electronic device of claim 1, wherein the first modulation signal is comprised of a constant level signal and an oscillating square wave signal.
3. The electronic device according to claim 1, wherein the infrared emission means comprises an infrared emission device, the infrared reception means comprises an infrared reception device, and the light-shielding sheet is disposed between the infrared emission device and the infrared reception device.
4. The electronic device according to claim 1 or 3, wherein the light shielding plate extends to the housing.
5. A detection method, applied in an electronic device according to any one of claims 1-4, the method comprising:
generating a first signal sequence;
converting the first signal sequence into a first modulation signal according to a preset modulation period, and transmitting the first modulation signal;
receiving a second modulation signal, and converting the second modulation signal into a second signal sequence according to the preset modulation period;
and determining whether the electronic equipment is in a detached state or not according to the matching relation between the second signal sequence and the first signal sequence.
6. The method of claim 5, wherein generating the first signal sequence comprises:
generating a first signal sequence by a random algorithm, wherein the first signal sequence is a number sequence of a predetermined length consisting of a number 0 and a number 1.
7. The method of claim 5, wherein the first modulation signal is comprised of a constant level signal and an oscillating square wave signal.
8. A detection device, the device comprising:
a signal generation module for generating a first signal sequence;
the signal modulation module is used for converting the first signal sequence into a first modulation signal according to a preset modulation period and transmitting the first modulation signal;
the signal demodulation module is used for receiving a second modulation signal and converting the second modulation signal into a second signal sequence according to the preset modulation period;
and the signal judgment module is used for determining whether the electronic equipment is in a disassembly state according to the matching relation between the second signal sequence and the first signal sequence.
9. A storage medium having a computer program stored thereon, the computer program, when being executed by a processor, realizing the steps of the method of any one of claims 5 to 7.
10. A computer arrangement comprising a memory, a processor and a computer program stored on the memory and executable on the processor, characterized in that the computer program realizes the steps of the method of any one of claims 5 to 7 when executed by the processor.
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