Anti-theft system and method for computer host hardware

Abstract

The invention relates to the technical field of computer hardware anti-theft, and discloses a computer host hardware anti-theft system which comprises an anti-theft signal generation unit, a test data generation module, a test data sending module, a data analysis module, a trigger alarm module, a signal conversion module and a signal acquisition module. The anti-theft signal generating unit specifically comprises a test data receiving module, a data storage module, a test data conversion module and a signal transmitting module. According to the invention, the anti-theft signal generating unit is arranged in the case, and the case is made of a metal material, so that a specific frequency band signal emitted by the anti-theft signal generating unit can be shielded, and at the moment, whether the case is disassembled or not can be judged according to the shielding strength of the signal received by the signal acquisition module; according to the judgment method, anti-theft monitoring can be accurately carried out on internal hardware of all indoor cases.

Description

Technical Field

[0001] The present invention relates to the technical field of computer hardware anti-theft, and in particular to an anti-theft system and method for computer host hardware. Background Art

[0002] In places where computers are concentrated and there are many people, such as Internet cafes, call centers, and service centers, computer hardware such as the CPU, memory, and graphics card of the computer host are often stolen. Currently, there is no good anti-theft method, and it can only be avoided by personnel patrols. However, manual inspections alone are bound to have omissions, providing thieves with opportunities.

[0003] An existing patent discloses a computer hardware anti-theft system (publication number CN204406576U), which includes a hardware position deflection detection device, a signal transmitter, and an anti-theft host. Hardware position deflection detection and current detection trigger the signal transmitter to send a signal to the anti-theft host, which then issues an alarm, prompting management to promptly investigate the computer corresponding to the signal transmitter. The technology disclosed in this patent is expensive to deploy, especially in environments with a large number of computers, such as internet cafes. Furthermore, it is difficult to monitor the computer chassis for hardware theft after the computer is powered off. Summary of the Invention

[0004] The main technical problem solved by the present invention is to provide an anti-theft system and method for computer host hardware, which solves the problems in the above-mentioned background technology.

[0005] To solve the above technical problems, according to one aspect of the present invention, more specifically, a computer host hardware anti-theft system includes an anti-theft signal generating unit, a test data generating module, a test data sending module, a data analyzing module, a triggering alarm module, a signal conversion module, and a signal acquisition module; the anti-theft signal generating unit specifically includes a test data receiving module, a data storage module, a test data conversion module, and a signal transmitting module; The anti-theft signal generating unit is placed inside the chassis and is used to transmit a signal in a specific frequency band; The signal acquisition module is used to receive the signal transmitted by the anti-theft signal generating unit and shielded by the metal chassis; The data analysis module is used to compare the change in the original transmission signal with the shielded signal to determine whether the chassis has been disassembled and decide whether to trigger an alarm accordingly.

[0006] Furthermore, the test data receiving module is used to download the test data packet from the wireless router and store the downloaded test data packet in the data storage module.

[0007] Furthermore, the test data generating module is used to generate a test data packet, and the test data packet is uploaded to the wireless router end through the test data sending module.

[0008] Furthermore, the data storage module is used to store the test data packets and provide the test data conversion module with the calling of the test data packets.

[0009] Furthermore, the test data conversion module is used to parse the frequency band information of the test signal in the test data packet and feed the parsed frequency band information back to the signal transmission module; The signal transmitting module is a module for generating signals in a specific frequency band.

[0010] Furthermore, the data analysis module determines the probability coefficient of the host chassis being disassembled based on the shielding coefficient of the collected signal, the distortion amount of the signal, and the phase change amount of the signal, which is:

[0011] Where, Indicates the probability coefficient of the host chassis being disassembled, Indicates the shielding coefficient of the collected signal, Indicates the amount of signal distortion of the acquired signal, Indicates the phase change of the acquired signal.

[0012] Furthermore, the data analysis module determines the shielding coefficient of the collected signal according to the signal attenuation and the noise increase of the collected signal, which is:

[0013] Where, Indicates the shielding coefficient of the collected signal, Indicates the attenuation of the acquired signal. Indicates the amount of noise added to the acquired signal.

[0014] Furthermore, when , it means that the host chassis has been disassembled. At this time, the data analysis module needs to send a red alarm command to the trigger alarm module; when , it means that the host chassis has not been obviously disassembled. At this time, the data analysis module needs to send a yellow warning instruction to the trigger alarm module; when , it indicates that the host chassis has not been disassembled, and the data analysis module does not need to send an alarm instruction to the trigger alarm module.

[0015] Furthermore, the anti-theft signal generating unit is provided with an independent power supply battery, wherein the independent power supply battery is powered by the host power supply of the computer host; the anti-theft signal generating unit is signal-connected to the network card module of the computer host, wherein the anti-theft signal generating unit downloads the test data packet through the network card module.

[0016] A method for preventing theft of computer host hardware comprises the following steps: S1. The test data generation module generates a signal of a specific frequency band and transmits it to the anti-theft signal generation unit through a wireless router; S2, the anti-theft signal generating unit transmits a signal of a specific frequency band, which is received by the signal acquisition module after being shielded by the metal chassis of the host; S3. The data analysis module determines whether the host chassis is disassembled according to the shielded state of the received transmission signal.

[0017] Beneficial effects: 1. The present invention places the anti-theft signal generating unit inside the chassis. Since the chassis is made of metal, the specific frequency band signal emitted by the anti-theft signal generating unit will be shielded. At this time, it can be judged whether the chassis is disassembled based on the strength of the shielding of the signal received by the signal acquisition module. This judgment method can accurately perform anti-theft monitoring on the internal hardware of all indoor chassis.

[0018] 2. The present invention uploads the test data packet to the anti-theft signal generating unit through the wireless router through the test data generating module. The test data packet can record the host number information and the frequency band information of the transmitted signal, so that the anti-theft signal generating unit can transmit the sub-frequency band information, and the signal acquisition module will also collect the signal of the frequency band, so that it can determine whether the collected signal is blocked.

[0019] 3. The present invention determines the probability coefficient of the host chassis being disassembled based on the shielding coefficient of the collected signal, the distortion amount of the signal and the phase change amount of the signal through the data analysis module, and judges whether the host chassis has been disassembled based on the probability coefficient of the host chassis being disassembled, and whether it is necessary to issue a red alarm instruction to the trigger alarm module. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 Schematic diagram of the anti-theft signal generating unit of the present invention; Figure 3 This is the mathematical model diagram of P, c and e under the state of controlling variable d. DETAILED DESCRIPTION

[0021] In order to make the technical solution of the present invention clearer, the present invention is further described in detail below with reference to the accompanying drawings and specific embodiments.

[0022] like Figure 1 、 2 As shown, a method for preventing theft of computer host hardware includes the following steps: Step 1: The test data generation module generates a signal of a specific frequency band, and transmits the signal information of the frequency band to the anti-theft signal generation unit in the host chassis through the wireless router.

[0023] Step 2: The anti-theft signal generating unit in the host chassis transmits a signal of a specific frequency band, which is still received by the signal acquisition module after being shielded by the host metal chassis.

[0024] Step 3: The data analysis module determines whether the host chassis is disassembled according to the state after the received transmission signal is shielded.

[0025] Example 1 like Figure 1 、 2 According to one aspect of the present invention, a computer host hardware anti-theft system is provided, comprising an anti-theft signal generating unit, a test data generating module, a test data transmitting module, a data analyzing module, an alarm triggering module, a signal conversion module, and a signal acquisition module. The anti-theft signal generating unit specifically comprises a test data receiving module, a data storage module, a test data conversion module, and a signal transmitting module. By placing the anti-theft signal generating unit inside a computer chassis, the specific frequency band signal emitted by the anti-theft signal generating unit is shielded due to the metal chassis. The signal emitted by the anti-theft signal generating unit is a low-frequency signal of approximately 125 kHz.

[0026] The 125 kHz low-frequency signal has excellent penetration, effectively penetrating metal chassis and remaining detectable by the signal acquisition module even when shielded. This frequency band is suitable for detecting chassis disassembly. Furthermore, the use of low-frequency signals significantly reduces the energy consumption of the signal transmission module.

[0027] The test data generation module is used to generate a test data packet, which is uploaded to the wireless router via the test data transmission module. The anti-theft signal generation unit is used to download the test data packet from the wireless router and convert the downloaded test data packet into a signal corresponding to the test frequency band, which is then transmitted by the signal transmission module. The signal acquisition module is used to acquire the signal transmitted by the anti-theft signal generation unit and feed the acquired signal information back to the data analysis module. The data analysis module compares the signal data generated by the test data generation module with the signal collected by the signal acquisition module to determine the signal attenuation, noise increase, signal distortion, and phase change of the acquired signal, and determines whether to send an alarm instruction to the alarm triggering module based on the change in the acquired signal. By placing the anti-theft signal generation unit inside the chassis, and because the chassis is made of metal, the specific frequency band signal emitted by the anti-theft signal generation unit is shielded. At this time, the strength of the shielding of the signal received by the signal acquisition module can be used to determine whether the chassis has been disassembled. This judgment method can accurately monitor the internal hardware of all chassis in the room.

[0028] Example 2 like Figure 2 As shown, the test data receiving module is used to download test data packets from the wireless router and store the downloaded test data packets in the data storage module. The data storage module is used to store the test data packets and provide the test data conversion module with access to the test data packets. The test data conversion module is used to parse the frequency band information of the test signal in the test data packet and feed the parsed frequency band information back to the signal transmission module. The signal transmission module is used to transmit the signal corresponding to the test frequency band. The anti-theft signal generating unit is equipped with an independent power supply battery, wherein the independent power supply battery is powered by the host power supply of the computer host; the anti-theft signal generating unit is connected to the network card module of the computer host, wherein the anti-theft signal generating unit downloads the test data packets through the network card module. The test data packet is uploaded to the anti-theft signal generating unit via the wireless router through the test data generation module. The test data packet can record the host number information and the frequency band information of the transmitted signal, so that the anti-theft signal generating unit can transmit the sub-frequency band information, and the signal acquisition module will also acquire the signal in this frequency band, so that it can determine whether the acquired signal is blocked.

[0029] Example 3 like Figure 3 As shown, the data analysis module determines the probability coefficient of the host chassis being disassembled based on the shielding coefficient of the collected signal, the distortion amount of the signal, and the phase change amount of the signal, which is:

[0030] Where, Indicates the probability coefficient of the host chassis being disassembled, Indicates the shielding coefficient of the collected signal, Indicates the amount of signal distortion of the acquired signal, Indicates the phase change of the acquired signal.

[0031] In this embodiment, variable e is used as the probability coefficient for determining whether the host chassis has been disassembled. This is because attenuation caused by shielding materials can cause changes in signal transmission speed, thereby affecting the signal phase. When a signal passes through different media or materials, its propagation speed varies, causing the signal phase to shift at the receiving end.

[0032] The enclosed metal chassis of the host computer will form a Faraday cage, which will cause the phase of the signal at the receiving end to shift. When estimating the degree of signal shielding, the square of the phase change is used to calculate the change in signal quality. This change can reflect the stability or accuracy of the signal.

[0033] The data analysis module determines the shielding coefficient of the collected signal based on the signal attenuation and the noise increase of the signal, which is:

[0034] Where, Indicates the shielding coefficient of the collected signal, Indicates the attenuation of the acquired signal. Indicates the amount of noise added to the acquired signal.

[0035] Among them, the probability coefficient of the host chassis being disassembled at any time is calculated. Then the attenuation of the collected signal is (Unit: dB, signal attenuation = ,in Indicates the power of the collected signal. represents the actual power of the transmitted signal). The noise increase of the collected signal is (unit: dB), then:

[0036] Through the above calculation, we can know that the shielding coefficient of the collected signal is .

[0037] Furthermore, the signal distortion of the collected signal is measured (The signal distortion of the collected signal = , Indicates the amplitude of the original signal emitted by the anti-theft signal transmitting unit in the chassis. Indicates the amplitude of each harmonic in the acquired signal).

[0038] Among them, since physical media have their inherent electrical, magnetic and optical properties, these properties will affect the propagation of signals, and electronic components in the real world such as resistors, capacitors, transistors, etc. are not ideal, they have certain tolerances and nonlinear characteristics, which will cause signal distortion. Therefore, a certain degree of distortion is usually unavoidable, that is, .

[0039] The phase change of the collected signal is obtained (unit: degrees, a phase difference of 180° indicates a complete phase reversal of the signal). Then:

[0040] From the above calculation, we can know that the probability coefficient of the host chassis being disassembled any number of times is calculated, where the probability coefficient of the host chassis being disassembled is , then compare multiple groups of data: Table 1 Signal monitoring parameters and chassis status of some embodiments From the data in Table 1 above, we can see that when the sample embodiment data tends to infinity, there will be a probability coefficient P as a dividing line to determine whether the host chassis is disassembled. When , it means that the host chassis has been disassembled. At this time, the data analysis module needs to send a red alarm command to the trigger alarm module; when When , it means that the host chassis has not been obviously disassembled. At this time, the data analysis module needs to send a yellow warning instruction to the trigger alarm module; when , it indicates that the host chassis has not been disassembled, and the data analysis module does not need to send an alarm instruction to the trigger alarm module.

[0041] The above-described embodiments merely illustrate several implementations of the present invention, and while their descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the present invention. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the spirit of the present invention, all of which fall within the scope of protection of the present invention. Therefore, the scope of protection of the present invention shall be determined by the appended claims.

Claims

1. A computer host hardware anti-theft system, characterized in that: It includes an anti-theft signal generating unit, a test data generating module, a test data sending module, a data analyzing module, a triggering alarm module, a signal conversion module and a signal acquisition module; the anti-theft signal generating unit specifically includes a test data receiving module, a data storage module, a test data conversion module and a signal transmitting module; The anti-theft signal generating unit is placed inside the chassis and is used to transmit a signal in a specific frequency band; The signal acquisition module is used to receive the signal transmitted by the anti-theft signal generating unit and shielded by the metal chassis; The data analysis module is used to compare the change in the original transmission signal with the shielded signal to determine whether the chassis has been disassembled and decide whether to trigger an alarm accordingly.

2. The computer host hardware anti-theft system and method according to claim 1, characterized in that: The test data receiving module is used to download the test data packet from the wireless router and store the downloaded test data packet in the data storage module.

3. The computer host hardware anti-theft system and method according to claim 1, characterized in that: The test data generating module is used to generate a test data packet, which is uploaded to the wireless router end through the test data sending module.

4. The computer host hardware anti-theft system and method according to claim 1, characterized in that: The data storage module is used to store the test data packets and provide the test data conversion module with the calling of the test data packets.

5. The computer host hardware anti-theft system and method according to claim 1, characterized in that: The test data conversion module is used to parse the frequency band information of the test signal in the test data packet and feed the parsed frequency band information back to the signal transmission module; The signal transmitting module is a module for generating signals in a specific frequency band.

6. The computer host hardware anti-theft system and method according to claim 1, characterized in that: The data analysis module determines the probability coefficient of the host chassis being disassembled based on the shielding coefficient of the collected signal, the distortion amount of the signal, and the phase change amount of the signal, which is: ； Where, Indicates the probability coefficient of the host chassis being disassembled, Indicates the shielding coefficient of the collected signal, Indicates the amount of signal distortion of the acquired signal, Indicates the phase change of the acquired signal.

7. The computer host hardware anti-theft system and method according to claim 6, characterized in that: The data analysis module determines the shielding coefficient of the collected signal according to the signal attenuation and the noise increase of the signal, which is: ； Where, Indicates the shielding coefficient of the collected signal, Indicates the attenuation of the acquired signal. Indicates the amount of noise added to the acquired signal.

8. The computer host hardware anti-theft system and method according to claim 6, characterized in that: when , it means that the host chassis has been disassembled. At this time, the data analysis module needs to send a red alarm command to the trigger alarm module; when , it means that the host chassis has not been obviously disassembled. At this time, the data analysis module needs to send a yellow warning instruction to the trigger alarm module; when , it indicates that the host chassis has not been disassembled, and the data analysis module does not need to send an alarm instruction to the trigger alarm module.

9. The computer host hardware anti-theft system and method according to claim 1, characterized in that: The anti-theft signal generating unit is provided with an independent power supply battery, wherein the independent power supply battery is powered by the host power supply of the computer host; the anti-theft signal generating unit is signal-connected to the network card module of the computer host, wherein the anti-theft signal generating unit downloads the test data packet through the network card module.

10. A method for preventing theft of computer host hardware, characterized in that: The computer host hardware anti-theft method is applied to the computer host hardware anti-theft system according to any one of claims 1 to 9, and the computer host hardware anti-theft method comprises the following steps: S1. The test data generation module generates a signal of a specific frequency band and transmits it to the anti-theft signal generation unit through a wireless router; S2, the anti-theft signal generating unit transmits a signal of a specific frequency band, which is received by the signal acquisition module after being shielded by the metal chassis of the host; S3. The data analysis module determines whether the host chassis is disassembled according to the shielded state of the received transmission signal.

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