Anti-theft device for intelligent terminal, intelligent terminal, anti-theft system and method

Abstract

The present invention provides an anti-theft device, an intelligent terminal, an anti-theft system and a method for an intelligent terminal, which are used for anti-theft and charging of multiple intelligent terminals. The anti-theft device includes: a detection circuit, the detection circuit is connected to the intelligent terminal through a USB interface, the USB interface includes at least four signals of a positive voltage pole V+, a positive detection pole D+, a negative detection pole D‑ and a negative voltage pole V‑, the positive voltage pole V+ and the negative voltage pole V‑ are used to power the intelligent terminal, and the positive detection pole D+ and the negative detection pole D‑ are used for in-situ detection of the intelligent terminal; a processor, a computer program is stored in the processor, and the computer program is executed by the processor to realize the anti-theft and charging of the intelligent terminal; the positive detection pole D+ and the negative detection pole D‑ are also used to realize the communication between the intelligent terminal and the processor; a power module is electrically connected to the processor, the detection circuit and the intelligent terminal. The present invention avoids false alarms and missed alarms by matching the terminal with the anti-theft device, which affects the user experience.

Description

Technical Field

[0001] The present invention belongs to the technical field of terminal anti-theft, and in particular relates to an anti-theft device for an intelligent terminal, an intelligent terminal, an anti-theft system and a method. Background Art

[0002] In the product showroom of smart terminals, USB interface cables are generally used for charging and anti-theft of smart terminals. Due to aesthetic requirements, USB interface cables are generally designed as retractable pull-cord reels or spring wire structures. After a large number of customers have used the smart terminals for a long time, their USB interfaces are prone to stress fatigue, resulting in poor contact and false alarms. In addition, as the time customers experience the product increases, the probability of false alarms will also increase, which has affected the user experience.

[0003] Since traditional USB interface cables usually use a single signal level detection method or a signal communication method for theft prevention, and there are many types and models of smart terminals, the signal level and communication protocol of the USB interface cannot be unified, resulting in some terminals being unable to match the anti-theft device, resulting in false alarms and missed alarms, affecting the user experience. Summary of the invention

[0004] The technical problem to be solved by the present invention is to provide an anti-theft device for a smart terminal, a smart terminal, an anti-theft system and a method to solve the technical problem that some terminals cannot match the anti-theft device, resulting in false alarms and missed alarms, affecting the user experience.

[0005] In order to solve the above problems, the first object of the present invention is to provide an anti-theft device for a smart terminal, which is used for anti-theft and charging of multiple smart terminals, comprising:

[0006] The detection circuit is connected to the intelligent terminal via a USB interface, wherein the USB interface includes at least four signals: a positive voltage pole V+, a positive detection pole D+, a negative detection pole D-, and a negative voltage pole V-.

[0007] The voltage positive electrode V+ and the voltage negative electrode V- are used to power the smart terminal, and the detection positive electrode D+ and the detection negative electrode D- are used to implement in-situ detection of the smart terminal;

[0008] A processor, wherein a computer program is stored in the processor, and when the computer program is executed by the processor, the anti-theft and charging of the smart terminal are realized; the detection positive electrode D+ and the detection negative electrode D- are also used to realize the communication between the smart terminal and the processor;

[0009] A power module is electrically connected to the processor, the detection circuit and the smart terminal.

[0010] Preferably, a first diode D1 and a first diode D2 are provided between the processor and the positive and negative ports of the power module.

[0011] Preferably, the detection positive electrode D+ and the detection negative electrode D- of the USB interface are respectively connected to one end of the first resistor R1 and the first resistor R2, and the other ends of the first resistor R1 and the first resistor R2 are connected in parallel and then grounded.

[0012] Preferably, it further comprises an alarm module and a communication module, both of which are electrically connected to the processor, and the alarm module is used to send an anti-theft alarm signal to the user of the smart terminal.

[0013] Preferably, the communication module is a wired module or a wireless module.

[0014] Preferably, a host computer is further included, and the host computer is communicatively connected to the processor.

[0015] Preferably, the processor comprises:

[0016] A state detection module, used to detect the current state of the smart terminal in real time through the detection circuit;

[0017] The judgment module is used to judge whether the smart terminal is being stolen according to the current state of the smart terminal.

[0018] Compared with the prior art, the present invention has significant advantages and beneficial effects, which are specifically embodied in the following aspects:

[0019] The processor of the anti-theft device in the present invention continuously scans and detects the V+, V-, D+ and D- signals of each channel terminal in the detection circuit, and at the same time counts the number of poor contact of the 4-way signals of each channel USB cable within a certain time end, and sends it to the host computer, gives a corresponding prompt level, and replaces auxiliary materials such as fatigue interface cables in advance to avoid missed reports and false alarms.

[0020] 2. The anti-theft device of the smart terminal reduces the probability of false alarms through repeated detection of multiple signals. The traditional solution only has one USB D+ or D- signal detection, which is prone to false alarms due to poor contact, thereby improving reliability.

[0021] A second objective of the present invention is to provide a smart terminal, wherein the smart terminal comprises the anti-theft device for the smart terminal described above.

[0022] The third object of the present invention is to provide an anti-theft system for a smart terminal, the system comprising a smart wearable device and the anti-theft device for the smart terminal described above;

[0023] The smart wearable device is worn by the user of the smart terminal, and is used to receive the anti-theft alarm signal sent by the alarm module when the judgment module determines that the smart terminal is being stolen, and generate vibration under the triggering of the anti-theft alarm signal.

[0024] A fourth object of the present invention is to provide an anti-theft method for an intelligent terminal, the method comprising:

[0025] S1: Detecting the current state of the smart terminal in real time through a detection circuit;

[0026] S2: judging whether the smart terminal is being stolen according to the current state of the smart terminal;

[0027] S3: If it is determined that the smart terminal is being stolen, an anti-theft alarm signal is sent to the user of the smart terminal.

[0028] Since the smart terminal, the anti-theft system and method of the smart terminal are used to implement the anti-theft device of the smart terminal, they at least have all the technical effects of the anti-theft device of the smart terminal. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 A system block diagram of an anti-theft device for an intelligent terminal in an embodiment of the present invention;

[0030] Figure 2 Schematic diagram of the structure of the anti-theft device of the intelligent terminal in an embodiment of the present invention;

[0031] Figure 3 Schematic diagram of a power module output voltage value monitoring circuit in an embodiment of the present invention;

[0032] Figure 4 Schematic diagram of the anti-theft method for a smart terminal in an embodiment of the present invention. DETAILED DESCRIPTION

[0033] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, specific embodiments of the present invention are described in detail below with reference to the accompanying drawings.

[0034] The signal detection method of the traditional anti-theft solution of smart terminals is: when connected to the smart terminal, the D+ and D- voltages will be driven by the smart terminal, so that the level changes. However, the signal level of some smart terminals after connection is consistent with that of the motherboard, which makes it difficult to distinguish, resulting in false alarms after the smart terminal is disconnected. The driving signals of some smart terminals are pulse-type, and the pulse interval is long, so the motherboard cannot effectively prevent theft.

[0035] In addition, the USB ports of some electronic products are only used for charging and cannot detect the driving status of their D+ and D- signals.

[0036] To solve the above technical problems, Figure 1-3 As shown, an embodiment of the present invention provides an anti-theft device for a smart terminal, which is used to prevent theft and charge multiple smart terminals. The anti-theft device includes a detection circuit, a processor and a power module, wherein:

[0037] The detection circuit is connected to the intelligent terminal via a USB interface, which includes at least four signals: a positive voltage pole V+, a positive detection pole D+, a negative detection pole D-, and a negative voltage pole V-. In this embodiment, the anti-theft detection signal is switched to the detection circuit via a multi-channel analog switch to reduce costs.

[0038] The positive voltage pole V+ and the negative voltage pole V- are used to supply power to the smart terminal, and the positive detection pole D+ and the negative detection pole D- are used to implement in-situ detection of the smart terminal;

[0039] The processor stores a computer program, and when the computer program is executed by the processor, the anti-theft and charging of the smart terminal are realized, and the detection positive electrode D+ and the detection negative electrode D- are also used to realize the communication between the smart terminal and the processor;

[0040] The power module is electrically connected to the processor, the detection circuit and the intelligent terminal.

[0041] Therefore, in the embodiment of the present invention, by counting the levels of the 4-way signals (V+, V-, D+ and D-) of each intelligent terminal, the frequency state of poor contact of the cable or interface is determined, and an early warning is given and the cables and other accessories are replaced; by the multi-way signal repeated detection method of the detection circuit, the effective anti-theft of the anti-theft device mainboard is guaranteed, and the false alarm probability of the anti-theft device is reduced; compared with the traditional solution, the traditional solution only has one-way USB interface D+ or D- signal detection, which is easy to cause false alarms due to poor contact.

[0042] In addition, through the joint detection of power supply and communication signal, when the positive detection D+ signal and the negative detection D- signal are disconnected, the corresponding detection voltage is negative relative to the terminal, which is not within the terminal level range, has better discrimination and reduces the probability of missed reporting.

[0043] Specifically, see Figure 2 As shown, in the embodiment of the present invention, a first diode D1 and a first diode D2 are provided between the processor and the positive and negative ports of the power module.

[0044] In this embodiment, the processor is also the host of the anti-theft device. A first diode D1 and a first diode D2 are added to the positive and negative power supply ports of the processor respectively. The mainboard output power V O, the output voltage V+ is passed through the first diode D1 to power the smart terminal. The use of low-voltage Schottky diodes can reduce the energy loss of the system power supply circuit on the one hand, and ensure that the negative voltage of the detection positive electrode D+ and the detection negative electrode D- is small, so as not to damage the terminal.

[0045] When the positive pole of the USB interface is connected normally, there is a voltage drop V on the first diode D1. D =V O -V+, if the positive pole of the power supply is not connected properly, V O =V+, so by detecting V + Voltage value, you can determine whether the positive cable of the USB cable power supply is connected normally; the same method can be used to detect V - Voltage value, to determine whether the negative cable of the USB cable power supply is connected normally.

[0046] It should be noted that since a diode is connected in series at the output end of the power module, the output voltage is 2V lower than the original. D Therefore, the voltage of the power module needs to be set to V O =5+2V D The processor can also detect the output power voltage of the power module and automatically adjust the output voltage value.

[0047] See also Figure 3 As shown in the figure, since the general power module has an over-temperature protection function, when the temperature is too high, the output voltage of the power module drops to 0V, causing the detection circuit to think that the power is disconnected. In order to avoid instantaneous false alarms, a circuit is used to monitor the output of the power module, V O1 , V O2 ...V On It is the output voltage signal of each power module. When one of the power supplies stops outputting, that is, the Power signal is at a low level, the connection problem between the power cable V+ and V- can be ruled out.

[0048] Specifically, see Figure 2 As shown, in the embodiment of the present invention, the detection positive electrode D of the USB interface + and detect negative electrode D - They are respectively connected to one end of the first resistor R1 and the first resistor R2, and the other ends of the first resistor R1 and the first resistor R2 are connected in parallel and then grounded.

[0049] Therefore, the positive electrode D of the USB interface is detected + and detect negative electrode D - The first resistor R1 and the first resistor R2 are respectively added, and the resistance values ​​of the first resistor R1 and the first resistor R2 are relatively large (weak pull-down), and the reference ground potential of the processor (ie, the anti-theft device mainboard) is GND (set to 0V) and is consistent with the potential output by the power module.

[0050] Since the first resistor R1 and the first resistor R2 are large-value resistors, the pull-down current is small and the terminal is not damaged; at the same time, it can ensure that the detection positive electrode D+ and the detection negative electrode D- signals are easily driven by the terminal, and the terminal signal is easier to distinguish and detect when connected to the anti-theft mainboard.

[0051] When the USB interface V- of the smart terminal is connected normally, the corresponding reference ground potential of the smart terminal is V- and satisfies 0+V D =V-.

[0052] When the detection positive electrode D+ or the detection negative electrode D- is disconnected, the signal line is pulled down to 0V through the first resistor R1 or the first resistor R2, which is a negative voltage relative to the voltage negative electrode V-.

[0053] When the detection positive electrode D+ or the detection negative electrode D- is connected normally, the internal signal line driving resistor of the smart terminal will pull up the detection positive electrode D+ and the detection negative electrode D- voltage. + and detect negative electrode D - The voltage value can be used to determine whether the signal line is connected normally.

[0054] Specifically, see Figure 2 As shown, in the embodiment of the present invention, the anti-theft device of the smart terminal further includes an alarm module and a communication module, both of which are electrically connected to the processor, and the alarm module is used to send an anti-theft alarm signal to the user of the smart terminal.

[0055] In this embodiment, the processor prompts different terminal connection states through the alarm module, such as through a buzzer or an LED light corresponding to each channel. When each channel of the processor is normally connected to the intelligent terminal, the buzzer beeps once and the LED light corresponding to the channel is always on;

[0056] If the intelligent terminal disconnects the alarm, the buzzer will sound long and the LED light corresponding to the channel will flash quickly; if at least one signal has poor contact, the buzzer will sound twice short and the LED light corresponding to the channel will flash slowly.

[0057] Specifically, in the embodiment of the present invention, the communication module is a wired module or a wireless module.

[0058] Thus, the processor is connected to the host computer through the communication module, and the functions of the host computer include remote unlocking of the anti-theft alarm, configuration of module parameters and prompting of the status of the anti-theft line of each channel terminal.

[0059] The processor (anti-theft device host) detects the V+, V-, D+ and D- signals of each channel terminal through uninterrupted scanning, and counts the number of poor contact of the 4-way signals of each channel USB cable within a certain time period, and sends it to the host computer, giving the corresponding prompt level, and replacing auxiliary materials such as fatigue interface cables in advance to avoid missed reports and false alarms.

[0060] The method is not limited to the 4-way signals of V+, V-, D+ and D- of the USB interface, but can also be extended to the multi-way signals of TYPE C to further improve reliability. It is also possible to reduce costs by using a detection method with less than 4 ways.

[0061] Specifically, in the embodiment of the present invention, the anti-theft device further includes a host computer, and the host computer is communicatively connected with the processor.

[0062] Specifically, in an embodiment of the present invention, the processor includes:

[0063] A state detection module, used to detect the current state of the intelligent terminal in real time through the detection circuit;

[0064] The judgment module is used to judge whether the smart terminal is being stolen according to the current state of the smart terminal.

[0065] Therefore, for the same smart terminal, the processor detects V+, V-, D+ and D- signals at the same time. When the four signals are disconnected at the same time, the anti-theft device alarms. When at least one signal is disconnected, the anti-theft device gives a corresponding prompt.

[0066] Please refer to Table 1. A detection value of 0 represents that the signal level is the same as the 0 potential, and a detection value of 1 represents that the signal level is the same as the output voltage of the power module.

[0067]

[0068] Table 1 Anti-theft device alarm logic table

[0069] An embodiment of the present invention further provides a smart terminal, which includes the anti-theft device for the smart terminal described above.

[0070] The embodiment of the present invention further provides an anti-theft system for a smart terminal, the anti-theft system comprising a smart wearable device and the anti-theft device for the smart terminal described above;

[0071] When the smart wearable device is worn by the user of the smart terminal, when the judgment module in the processor determines that the smart terminal is being stolen, it receives the anti-theft alarm signal sent by the alarm module and generates vibration under the triggering of the anti-theft alarm signal.

[0072] See also Figure 4As shown, an embodiment of the present invention further provides an anti-theft method for a smart terminal, the method comprising:

[0073] S1: Detecting the current state of the smart terminal in real time through a detection circuit;

[0074] S2: judging whether the smart terminal is being stolen according to the current state of the smart terminal;

[0075] S3: If it is determined that the smart terminal is being stolen, an anti-theft alarm signal is sent to the user of the smart terminal.

[0076] The advantages of the anti-theft method over the prior art are the same as those of the anti-theft device of the above-mentioned smart terminal, which will not be described in detail here.

[0077] Although the disclosure is disclosed as above, the protection scope of the disclosure is not limited thereto. Those skilled in the art may make various changes and modifications without departing from the spirit and scope of the disclosure, and these changes and modifications will fall within the protection scope of the present invention.

Claims

1. An anti-theft device for a smart terminal, used for anti-theft and charging of multiple smart terminals, characterized in that: include: The detection circuit is connected to the intelligent terminal via a USB interface, wherein the USB interface includes at least four signals: a positive voltage pole V+, a positive detection pole D+, a negative detection pole D-, and a negative voltage pole V-. The voltage positive electrode V+ and the voltage negative electrode V- are used to power the smart terminal, and the detection positive electrode D+ and the detection negative electrode D- are used to implement in-situ detection of the smart terminal; A processor, wherein a computer program is stored in the processor, and when the computer program is executed by the processor, the anti-theft and charging of the smart terminal are realized; the detection positive electrode D+ and the detection negative electrode D- are also used to realize the communication between the smart terminal and the processor; A power module, electrically connected to the processor, the detection circuit and the smart terminal; A first diode D1 and a first diode D2 are provided between the processor and the positive and negative ports of the power module; The detection positive electrode D+ and the detection negative electrode D- of the USB interface are respectively connected to one end of the first resistor R1 and the first resistor R2, and the other ends of the first resistor R1 and the first resistor R2 are connected in parallel and then grounded; The processor motherboard output power V O , the output voltage V is passed through the first diode D1 + Provide power to smart terminals; When the positive electrode of the power supply of the USB interface is connected normally, there is a voltage drop V D =V O -V+, if the positive pole of the power supply is not connected properly, V O =V+; The processor continuously scans the V+, V-, D+ and D- signals of the signal channel terminals of the positive voltage V+, the negative voltage V-, the positive detection electrode D+ and the negative detection electrode D-, and simultaneously counts the number of poor contacts of the four signals of the positive voltage V+, the negative voltage V-, the positive detection electrode D+ and the negative detection electrode D- in the USB cable within a certain time period, and sends them to the host computer to give a corresponding prompt level.

2. The anti-theft device for a smart terminal according to claim 1, characterized in that: It also includes an alarm module and a communication module, both of which are electrically connected to the processor, and the alarm module is used to send an anti-theft alarm signal to the user of the smart terminal.

3. The anti-theft device for a smart terminal according to claim 2, characterized in that: The communication module is a wired module or a wireless module.

4. The anti-theft device for a smart terminal according to claim 1, characterized in that: It also includes a host computer, which is communicatively connected with the processor.

5. The anti-theft device for a smart terminal according to claim 1, characterized in that: The processor comprises: A state detection module, used to detect the current state of the smart terminal in real time through the detection circuit; The judgment module is used to judge whether the smart terminal is being stolen according to the current state of the smart terminal.

6. An intelligent terminal, characterized in that: The smart terminal comprises the anti-theft device for the smart terminal according to any one of claims 1 to 5.

7. An anti-theft system for a smart terminal, characterized in that: The system comprises a smart wearable device and an anti-theft device for a smart terminal according to any one of claims 1 to 5; The smart wearable device is worn by the user of the smart terminal, and is used to receive the anti-theft alarm signal sent by the alarm module when the judgment module determines that the smart terminal is being stolen, and generate vibration under the triggering of the anti-theft alarm signal.

8. An anti-theft method for a smart terminal, using the anti-theft device for a smart terminal according to any one of claims 1 to 5, characterized in that: The method comprises: S1: Detecting the current state of the smart terminal in real time through a detection circuit; S2: judging whether the smart terminal is being stolen according to the current state of the smart terminal; S3: If it is determined that the smart terminal is being stolen, an anti-theft alarm signal is sent to the user of the smart terminal.

Images