A device and method for detecting and alarming a broken wire in a locking rope state

Abstract

The present invention relates to a lock rope state detection and disconnection alarm device and method; an inner core wire is wrapped in a steel wire lock rope, one end of the inner core wire extends to the outside of the fixed end of the steel wire lock rope, and the other end is insulated and suspended inside the movable end of the steel wire lock rope, and the inner core wire is not conductive with the steel wire lock rope; a single-chip microcomputer and a detection circuit are provided in the lock body, the inner core wire extending to the outer end of the steel wire lock rope is connected to the CVCC signal terminal of the detection circuit, and the fixed end of the steel wire lock rope is connected to the PGND signal terminal of the detection circuit; a self-locking structure inside the lock body is connected to the PVCC signal terminal of the detection circuit, when the lock is engaged, after the movable end of the steel wire lock rope is connected to the self-locking structure inside the lock body, the movable end of the steel wire lock rope is connected to the PVCC signal terminal of the detection circuit; at this time, the PVCC signal terminal in the detection circuit is connected to the PGND signal terminal; the input terminal of the single-chip microcomputer is respectively connected to the DXCGQ terminal and the DXCGQ_1 terminal of the detection circuit; by detecting the change in electrical level, it is determined whether the lock rope is damaged, thereby improving the safety of the lock.

Description

Technical Field

[0001] The present application relates to the technical field of rope lock alarms, and in particular to a rope lock status detection and line break alarm device and method. Background Art

[0002] With the advancement of electronic technology, smart electronic locks have become increasingly popular. While electronic locks offer significant advantages over traditional mechanical locks, they lack cord detection and alarm functionality. Many electronic padlocks lack alarms for cord cuts or damage. They still utilize traditional locks, such as steel beams, chains, or wire rope loops, which are integrated with the lock body to lock the lock, without cord detection and alarm functionality. The existing cord detection functionality in some electronic padlocks is subpar in sensitivity and presents security vulnerabilities. This vulnerability allows for easy circumvention of detection and alarms, posing a safety hazard. Summary of the Invention

[0003] In order to overcome the shortcomings of the above-mentioned prior art, the main purpose of the present invention is to provide a lock rope status detection and break alarm device and method that can determine whether the lock rope is damaged based on the changes in the level of the lock rope, such as determining whether the lock rope is damaged and issuing a timely alarm.

[0004] To achieve the above-mentioned object, the present invention adopts the following technical solution: a lock rope state detection and disconnection alarm device, comprising a lock body and a steel wire lock rope, wherein the fixed end of the steel wire lock rope is fixedly connected to the lock body, and the movable end of the steel wire lock rope is connected to a self-locking device in the lock body; an inner core wire is wrapped in the steel wire lock rope, one end of the inner core wire extends outside the fixed end of the steel wire lock rope, and the other end is insulated and suspended inside the movable end of the steel wire lock rope, and the inner core wire located inside the lock rope is not electrically connected to the steel wire lock rope;

[0005] The lock body is provided with a single-chip microcomputer and a detection circuit. The inner core wire extending to the outer end of the wire lock rope is connected to the CVCC signal terminal of the detection circuit, and the fixed end of the wire lock rope is connected to the PGND signal terminal of the detection circuit; the self-locking structure inside the lock body is connected to the PVCC signal terminal of the detection circuit. When the lock is engaged, the movable end of the wire lock rope is connected to the self-locking structure inside the lock body, and the movable end of the wire lock rope is connected to the PVCC signal terminal of the detection circuit; at this time, the PVCC signal terminal in the detection circuit is connected to the PGND signal terminal; the input terminal of the single-chip microcomputer is respectively connected to the DXCGQ terminal and the DXCGQ_1 terminal of the detection circuit;

[0006] When the wire rope is cut, the inner core wire is disconnected, the PVCC signal terminal and the PGND signal terminal are disconnected, and the microcontroller detects a change in the electrical level at the DXCGQ terminal in the detection circuit and issues a wire break alarm. When the wire rope is damaged, the CVCC signal terminal connected to the suspended inner core wire briefly touches the wire rope. The microcontroller detects a change in the electrical level at the DXCGQ_1 terminal in the detection circuit and issues an alarm indicating that the wire rope is damaged.

[0007] Furthermore, the detection circuit includes a first resistor R1, a third resistor R3, a second resistor R2 and a P_MOS transistor Q1; one end of the first resistor R1, one end of the third resistor R3, one end of the second resistor R2 and the source of the P_MOS transistor Q1 are connected to the power interface;

[0008] The other end of the first resistor R1 is connected to the anode of the first diode D1, and the cathode of the first diode D1 is connected to one end of the second capacitor C2, the cathode of the voltage stabilizing diode D3, the gate of the N_MOS transistor Q2, and the PVCC signal terminal respectively;

[0009] The other end of one end of the third resistor R3 is connected to the drain of the N_MOS transistor Q2 and the DXCGQ terminal respectively;

[0010] The other end of the second capacitor C2 and the cathode of the voltage stabilizing diode D3 are connected to the PGND signal terminal, and the source of the N_MOS transistor Q2 is connected to the GND terminal;

[0011] The other end of the second resistor R2 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the gate of the P_MOS transistor Q1, the CVCC signal terminal and the first capacitor C1;

[0012] The drain of the P_MOS tube Q1 is connected to the DXCGQ_1 terminal;

[0013] The drain of the P_MOS tube Q1 and the first capacitor C1 are connected to the PGND terminal;

[0014] When the wire rope is cut, the PVCC signal terminal is disconnected from the PGND terminal, the first resistor R1 and the second resistor R2 are pulled up, the level signal of the PVCC signal terminal changes from a low level signal to a high level signal, the N_MOS tube Q2 changes from non-conducting to conducting, and the signal of the DXCGQ terminal changes from a high level to a low level. At this time, the single-chip microcomputer receives the signal change of the DXCGQ terminal and sends a disconnection alarm signal;

[0015] When the wire rope is damaged, the inner core wire is connected to the middle of the wire rope, the CVCC signal terminal is briefly connected to the PGND terminal, the source and drain of the P_MOS tube Q1 are connected, and the signal at the DXCGQ_1 terminal is pulled up. The microcontroller detects that the level of the DXCGQ_1 terminal changes from low to high and then from high to low, and the microcontroller sends a damage alarm signal.

[0016] Furthermore, a fuse F1 is connected between the second capacitor C2 and the source of the N_MOS transistor Q2.

[0017] Furthermore, the drain of the P_MOS transistor Q1 is connected to the PGND terminal via a fourth resistor R4.

[0018] Furthermore, a first metal block and a second metal block are provided in the lock body, the first metal is connected to the PGND end of the detection circuit, the second metal block is located in the self-locking device in the lock body, and the second metal block is connected to the PVCC signal end of the detection circuit, the fixed end of the wire locking rope passes through the first metal block and is fixedly connected to the first metal block, and is connected to the PGND end, and the inner core wire extending outside the fixed end of the wire locking rope is connected to the CVCC signal end; after the movable end of the wire locking rope is inserted into the self-locking device and connected to the second metal block, the movable end of the wire locking rope is connected to the PVCC signal end.

[0019] Furthermore, the first metal block, the second metal block and the inner core wire are made of conductive materials.

[0020] Furthermore, the two ends of the inner core conductor inside the wire locking rope are respectively fixedly insulated and connected to the two ends of the wire locking rope, and the inner core conductor is a single-core electric wire.

[0021] Furthermore, it also includes an I / O level detection port, which is electrically connected to the single chip microcomputer, wherein two ports of the I / O level detection port are respectively connected to the DXCGQ terminal and the DXCGQ_1 terminal of the detection circuit.

[0022] A method for detecting a broken wire and alarming a locked rope state, comprising:

[0023] When the wire rope is cut, the inner core wire of the wire rope is disconnected, the PVCC signal terminal is disconnected from the PGND signal terminal, and the level signal of the PVCC signal terminal in the detection circuit is converted from a low-level signal to a high-level signal. The microcontroller detects the level change of the DXCGQ terminal in the detection circuit and issues a disconnection alarm.

[0024] When the wire rope is damaged, the CVCC signal end of the suspended inner core wire briefly touches the wire rope, and the CVCC signal end and the PGND signal end are briefly connected. The signal at the DXCGQ_1 end will be pulled up. At this time, the microcontroller detects that the level signal at the DXCGQ_1 end changes from low to high and then from high to low, and the microcontroller sends a damage alarm signal.

[0025] Furthermore, when the wire lock rope is cut, the inner core wire connecting the PVCC signal terminal and the PGND signal terminal is disconnected, the first resistor R1 and the second resistor R2 are pulled up, the level signal of the PVCC signal terminal is converted from a low level signal to a high level signal, the N_MOS tube Q2 is turned from non-conductive to conductive, and the signal of the DXCGQ terminal is converted from a high level to a low level. At this time, the single chip receives the signal change of the DXCGQ terminal and issues a disconnection alarm signal;

[0026] When the wire lock rope is damaged, the CVCC signal terminal connected to the suspended inner core wire briefly touches the wire lock rope, and the CVCC signal terminal and the PGND terminal are briefly connected. The source and drain of the P_MOS tube Q1 are turned on, and the signal at the DXCGQ_1 terminal will be pulled up. The microcontroller detects that the level of the DXCGQ_1 terminal changes from low to high and then from high to low, and the microcontroller sends a damage alarm signal.

[0027] Compared with the prior art, the present invention has the following advantages:

[0028] The inner core wire in the lock rope is used to connect the detection circuit and the single-chip microcomputer during locking. The single-chip microcomputer monitors the level signal of the detection circuit in real time. When the level signal monitored by the single-chip microcomputer changes, it indicates that the lock rope has been damaged. At this time, the single-chip microcomputer controls the alarm device to sound an alarm, which solves the current defect that there is no way to accurately detect the damage of the lock rope. At the same time, the inner core wire is added to the lock rope to serve as the basis for judging the damage of the lock rope, which reduces the cost of manufacturing the lock rope, and has high sensitivity and strong safety. BRIEF DESCRIPTION OF THE DRAWINGS

[0029] Figure 1 This is a schematic structural diagram of a lock according to an embodiment of the present invention;

[0030] Figure 2 This is a schematic structural diagram of a lock rope according to an embodiment of the present invention;

[0031] Figure 3 is a circuit diagram of a detection circuit in an embodiment of the present invention;

[0032] Figure 4 This is an interface diagram of a power supply unit in an embodiment of the present invention;

[0033] Figure 5 This is a diagram of the single chip microcomputer interface in an embodiment of the present invention;

[0034] Figure 6 This is a diagram of the rope lock interface in an embodiment of the present invention. DETAILED DESCRIPTION

[0035] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0036] Example 1:

[0037] like Figure 1 As shown, this embodiment provides a lock rope state detection and disconnection alarm device, including a lock body 1 and a wire lock rope 2, wherein the fixed end 201 of the wire lock rope 2 is fixedly connected to the lock body 1, and the movable end 202 of the wire lock rope 2 is inserted into the lock body 1 and fixedly connected to the lock body 1 when locking. Figure 2 As shown, an inner core conductor 3 is provided in the steel wire rope 2. When the steel wire rope is woven, an inner core conductor 3 is woven into the steel wire rope, and the middle part of the inner core conductor is suspended in the steel wire rope and is not connected to the steel wire rope; the two ends of the inner core conductor 3 are respectively located at the two ends of the steel wire rope, and are insulated and fixed to the two ends of the steel wire rope; this arrangement does not require the inner core conductor to rotate, and only needs to seal the end of the inner core conductor inside the steel wire rope so that it is not short-circuited with the outer shell of the steel wire rope; after the weaving is completed, the inner core conductor 3 is located in the middle of the steel wire rope; it is easy to manufacture and relatively low in cost. This solves the current problem that the steel wire rope 2 needs to form a back-and-forth loop steel wire rope, which makes the steel wire rope difficult to process, makes the steel wire rope thicker, and increases the manufacturing cost of the steel wire rope.

[0038] The end of the inner core wire 3 corresponding to the fixed end 201 of the wire locking rope 2 extends outside the wire locking rope 2 and is connected to the CVCC signal terminal in the detection circuit in the lock body 1, and the fixed end 201 of the wire locking rope is connected to the ground terminal of the detection circuit in the lock body 1, that is, connected to the PGND terminal in the detection circuit; when the movable end 202 of the wire locking rope 2 is inserted into the lock body 1, it is fixedly connected to the self-locking device in the lock body (the self-locking device is a conventional device for locking in the lock body, which will not be described in detail here) The movable end of the wire locking rope 2 is connected to the PVCC signal terminal in the detection circuit in the lock body 1; specifically, Figure 6 As shown, a first metal block and a second metal block are provided in the lock body 1. Both the first metal block and the second metal block are made of a metal with good conductive properties such as copper, gold, or silver. In this embodiment, a copper metal block is used. The first metal block is fixedly provided in the lock body 1 and is electrically connected to the PGND terminal of the detection circuit in the lock body 1. The fixed end 201 of the wire lock rope 2 passes through the first metal block and is fixedly connected to the first metal block to achieve the purpose of connecting the wire lock rope 2 to the PGND terminal. At the same time, the inner core wire 3 extending from the fixed end of the wire lock rope 2 is connected to the CVCC signal terminal of the detection circuit.

[0039] The second metal block is fixed in the self-locking device of the lock body 1. The second metal block is connected to the PVCC signal end of the detection circuit. When locking, the movable end 202 of the wire lock rope 2 is inserted into the second metal block for locking, and at the same time, the wire lock rope 2 is connected to the PVCC signal end of the detection circuit; specifically, a wire lock rope port is set on the lock body 1, which is a welding interface for the wire lock rope lead, so that the detection signal can be added to the wire lock rope, pin 1 of terminal H3 is connected to the network signal PVCC, pin 2 of terminal H3 is connected to the network signal CVCC, and pin 3 of terminal H3 is connected to the network signal PGND.

[0040] It also includes a single-chip microcomputer provided in the lock body 1, whose input end is respectively connected to the DXCGQ end and the DXCGQ_1 end of the detection circuit. When the wire lock rope is cut, the inner core wire is disconnected, the PVCC signal end is disconnected from the ground end, and the single-chip microcomputer detects that the level of the detection circuit has changed and issues a disconnection alarm; when the wire lock rope is damaged, the suspended inner core wire is connected to the middle part of the wire lock rope, and the CVCC signal end of the detection circuit is short-circuited with the wire lock rope. At this time, the single-chip microcomputer issues an alarm that the wire lock rope is damaged according to the change of the detection circuit.

[0041] Specifically, Figure 5 The microcontroller shown includes an I / O level detection port connected to an external I / O pin of the microcontroller (MCU). The MCU's external pins detect changes in the analog input voltage level to detect trigger signals. For example, rising edge triggering and falling edge triggering are used as a single-shot trigger signal. Pin 1 of terminal H2 is connected to the network signal DXCGQ, and pin 2 of terminal H2 is connected to the network signal DXCGQ_1. Specifically, DXCGQ is designed as an external core detection signal, and DXCGQ_1 is designed as an internal core detection signal. This embodiment uses the I / O port of the microcontroller to detect voltage levels to determine whether the wire rope is damaged. This eliminates the need to specify a functional ADC port. This conserves microcontroller resources and improves versatility.

[0042] The DXCGQ interface (first network interface) and the DXCGQ interface (second network interface) of the I / O level detection port are connected to the detection circuit. The single-chip microcomputer collects the level signal of the detection circuit through the two network interfaces. Since the inner core wire in the wire lock rope is connected to the detection circuit, as long as the inner core wire is damaged, the level in the entire detection circuit will change. When the single-chip microcomputer detects that the level signal in the detection circuit has changed, it means that the wire lock rope has been damaged. At this time, the single-chip microcomputer controls the alarm device to alarm. The alarm device in this embodiment can be an audible and visual alarm preset in the lock body or a remote alarm. The remote alarm includes an alarm module set in the running software for alarm reminder.

[0043] In one embodiment, Figure 3 As shown, the detection circuit includes a first resistor R1, a third resistor R3, a second resistor R2 and a P_MOS transistor Q1; one end of the first resistor R1, one end of the third resistor R3, one end of the second resistor R2 and the source of the P_MOS transistor Q1 are connected to the power interface; the power interface in this embodiment is connected to the Figure 4 The power supply port shown is the interface for the input power supply of the entire schematic diagram; pin 1 of terminal H1 is connected to the power network VCC_3.3V; pin 2 of terminal H1 is connected to GND.

[0044] The other end of the first resistor R1 is connected to the anode of the first diode D1, and the cathode of the first diode D1 is respectively connected to one end of the second capacitor C2, the cathode of the voltage stabilizing diode D3, the gate of the N-MOS transistor Q2, and the PVCC signal terminal; the anode of the voltage stabilizing diode D3 is connected to the PGND terminal, the other end of the second capacitor C2 is connected to the PGND terminal, one end of the fuse F1 is connected to the PGND terminal, and the other end of the fuse F1 is connected to the GND terminal. The fuse is located between the source of the N-MOS transistor Q2 of the second capacitor C2; the other end of one end of the third resistor R3 is respectively connected to the drain of the N-MOS transistor Q2 and the DXCGQ terminal.

[0045] The other end of the second resistor R2 is connected to the anode of the second diode D2, and the cathode of the second diode D2 is connected to the gate of the P_MOS transistor Q1, the CVCC signal terminal, and the first capacitor C1; the drain of the P_MOS transistor Q1 is connected to the DXCHQ_1 terminal; the other end of the fourth resistor R4 is connected to PGND, and the other end of the first capacitor C1 is connected to PGND. During the specific connection, the fixed end of the wire lock rope is connected to the PGND terminal, the inner core wire extending from the fixed end is connected to the CVCC signal terminal, and the movable end of the wire lock rope is connected to the PVCC signal terminal. The two input ports of the microcontroller are connected to the DXCGQ terminal and the DXCHQ_1 terminal, respectively.

[0046] By incorporating N-type and P-type MOS transistors, this embodiment achieves low power consumption even when the lock is locked and in standby mode for extended periods. Furthermore, the first and second capacitors C1 and C2 provide effective filtering. Adjusting their capacitance adjusts the circuit's detection sensitivity. Even if a large hydraulic pliers is used to quickly cut the wire rope, the inner core wire and the rope will form a closed loop, triggering the wire rope alarm.

[0047] In practical applications, this system must be used in conjunction with a single-chip microcontroller (MCU), which serves as the core logic processing chip. If the MCU is powered by 3.3V, the entire power supply port should be powered by 3.3V. If powered by 5V, the entire power supply port should be powered by 5V. This system is highly versatile and does not require a specific MCU model. The network signal terminals DXCGQ and DXCGQ_1 can be connected to two independent I / O ports on the MCU. Using analog level detection, rising and falling edges can be detected, allowing for detection of triggered signals.

[0048] In the circuit, the resettable fuse F1 prevents large currents from flowing from the external wire lock cable into the lock body, protecting the lock's internal stability. Therefore, the current limit of F1 should be as small as possible. The schematic diagram shows a 50mA overcurrent protection fuse.

[0049] The pull-up circuit formed by the first resistor R1 and the first diode D1 prevents short-circuit current when the PVCC network signal is connected to the PGND network signal. It also prevents the external wire lock from being maliciously charged with voltage that flows back into the lock body. Therefore, the diode is essential.

[0050] The third resistor R3 prevents the power supply VCC_3.3V from being short-circuited to ground when the N_MOS transistor Q2 is turned on. Secondly, it provides a pull-up function to raise the DXCGQ network to a high level when the N_MOS transistor Q2 is turned off.

[0051] The second capacitor C2 and the first capacitor C1 function, on the one hand, to provide filtering and prevent circuit voltage fluctuations. Furthermore, these two capacitors, in conjunction with the first resistor R1 and the first diode D1, and the second resistor R2 and the second diode D2, respectively, can control the charging and discharging rates, ensuring clear and complete upper and lower trigger edges in the trigger waveform. This prevents waveform changes from being too rapid and exceeding the microcontroller's detection response time.

[0052] The overvoltage protection diode D3 is also used to prevent the outside world from adding a large voltage to the wire lock rope and causing damage to the lock.

[0053] The N_MOS transistor is used at Q2 because the lock is designed for low power consumption. When the lock is normally locked, the N_MOS transistor at Q2 is turned on, reducing current leakage to ground. The P_MOS transistor is used at Q1 to reduce power consumption. Under normal circumstances, the P_MOS transistor at Q1 is turned off, thus reducing current leakage to ground.

[0054] The resistance values of the first resistor R1 and the second resistor R2 can be adjusted based on the length of the wire rope. Specifically, the longer the wire rope, the smaller the resistance value. This compensates for the resistance of the wire rope. Because the trigger is analog level-controlled, the values are not absolute. After appropriate adjustment, they should meet the microcontroller's level detection range. For example, the detection level threshold for a 3.3V-powered microcontroller is around 2.8V.

[0055] In this embodiment, since a positive detection core wire is added to the wire lock, even if the ends of the lock wire are manually short-circuited and then the wire is cut, the inner core wire lock wire detection alarm will be triggered. At the same time, because the inner core is positive, in actual use tests, any human contact with the inner core cable conductor may cause the voltage on the inner core cable to fluctuate. However, since the external steel wire is the ground wire, this design has strong anti-interference performance in terms of electromagnetic interference.

[0056] A wire lock rope state detection and wire break alarm method, comprising:

[0057] When the lock is in unlocked state;

[0058] The free end of the wire lock cable is disconnected from the second metal block, and the PVCC signal terminal is no longer connected to the PGND terminal via the inner core wire. Due to the pull-up action of the first resistor R1 and the first diode D1, the voltage level of the PVCC signal terminal is now high. N-MOS transistor Q2 is now conductive, meaning its source and drain are conductive. The network signal at the DXCGQ terminal is pulled down to ground, and the I / O port connected to this signal detects a low voltage level. The gate of the P-MOS transistor Q1 is pulled up by the second resistor R2 and the second diode D2, and the source and drain of the P-MOS transistor Q1 are not conductive. Due to the pull-down action of the fourth resistor R4, the network signal at the DXCGQ_1 terminal detects a low voltage level at the I / O port connected to this signal.

[0059] When the lock is in the locked state;

[0060] The movable end of the wire lock rope contacts the second metal block. The PVCC signal terminal is connected to the PGND terminal via an inner core conductor. This is equivalent to pulling the signal of the PVCC signal terminal to ground. The presence of the first resistor R1 and the first diode D1 prevents the circuit VCC_3.3V from being directly short-circuited to ground. At this time, the voltage level of the PVCC signal terminal is low. The N_MOS transistor Q2 is turned off, that is, the source and drain of the N_MOS transistor Q2 are not conductive. The network signal at the DXCGQ terminal is pulled high by the third resistor R3. At this time, the detection level of the microcontroller I / O port connected to this signal is high. The status of the P_MOS transistor Q1 remains unchanged, and the network signal status at the DXCGQ_1 terminal does not change.

[0061] When the steel wire rope is damaged when the lock is in the locked state.

[0062] If the wire rope is broken or disconnected anywhere in the middle, the network signal at the PVCC signal terminal no longer connects to the network signal at the PGND terminal through the inner core wire of the wire rope. Due to the pull-up action of the first resistor R1 and the first diode D1, the voltage level at the PVCC signal terminal transitions from low to high. The N-MOS transistor Q2 then transitions from non-conducting to conducting, meaning that the source and drain of the N-MOS transistor Q2 transition from non-conducting to conducting. The network signal at the DXCGQ terminal transitions from high to low. At this point, the microcontroller I / O port connected to this signal detects the corresponding voltage change, triggering a wire rope disconnection alarm. The gate of the P-MOS transistor Q1, due to the pull-up action of the second resistor R2 and the second diode D2, becomes non-conducting at the source and drain of the P-MOS transistor Q1. However, when the wire rope is damaged and the inner conductor is cut, the network signal at the CVCC signal terminal is briefly shorted to the PGND signal on the wire. The gate of the P_MOS transistor Q1 receives a low-level signal, and the source and drain of the P_MOS transistor Q1 are conductive, causing the network signal at the DXCGQ_1 terminal to be pulled up. At this time, the microcontroller I / O port connected to this signal will detect the voltage change from low to high and then from high to low. This voltage change triggers the microcontroller to wake up and send the corresponding alarm information, completing the detection and alarm function of the wire rope.

[0063] When the lock is unlocked, the wire rope is connected to the network signal at the PGND terminal, which is a low-level signal with no high electromotive force. When the lock is locked, although it is connected to the network signal at the PVCC terminal, it is a low-level signal. Therefore, the wire rope remains at a low level, without a high electromotive force or voltage difference. Therefore, the voltage level on the wire rope cannot be detected, greatly reducing the possibility of artificially identifying the voltage level and deliberately simulating it to cause damage.

[0064] The above embodiments are merely examples of the present invention and do not limit the scope of protection of the present invention. Any designs that are identical or similar to the present invention fall within the scope of protection of the present invention.

Claims

1. A lock rope state detection and disconnection alarm device, comprising a lock body and a wire lock rope, wherein the fixed end of the wire lock rope is fixedly connected to the lock body, and the movable end of the wire lock rope is connected to a self-locking device in the lock body; characterized in that: The steel wire locking rope is wrapped with an inner core conductor, one end of the inner core conductor extends outside the fixed end of the steel wire locking rope, and the other end is insulated and suspended inside the movable end of the steel wire locking rope, and the inner core conductor inside the locking rope is not electrically connected to the steel wire locking rope; The lock body is provided with a single-chip microcomputer and a detection circuit. The inner core wire extending to the outer end of the wire lock rope is connected to the CVCC signal terminal of the detection circuit, and the fixed end of the wire lock rope is connected to the PGND signal terminal of the detection circuit; the self-locking structure inside the lock body is connected to the PVCC signal terminal of the detection circuit. When the lock is engaged, the movable end of the wire lock rope is connected to the self-locking structure inside the lock body, and the movable end of the wire lock rope is connected to the PVCC signal terminal of the detection circuit; at this time, the PVCC signal terminal in the detection circuit is connected to the PGND signal terminal; the input terminal of the single-chip microcomputer is respectively connected to the DXCGQ terminal and the DXCGQ_1 terminal of the detection circuit; When the wire rope is cut, the inner core wire is disconnected, the PVCC signal terminal and the PGND signal terminal are disconnected, and the microcontroller detects a change in the electrical level at the DXCGQ terminal in the detection circuit and issues a wire break alarm. When the wire rope is damaged, the CVCC signal terminal connected to the suspended inner core wire briefly touches the wire rope. The microcontroller detects a change in the electrical level at the DXCGQ_1 terminal in the detection circuit and issues an alarm indicating that the wire rope is damaged.

2. The lock rope state detection and disconnection alarm device according to claim 1, characterized in that: The detection circuit comprises a first resistor (R1), a third resistor (R3), a second resistor (R2) and a P_MOS tube (Q1); one end of the first resistor (R1), one end of the third resistor (R3), one end of the second resistor (R2) and the source of the P_MOS tube (Q1) are connected to a power supply interface; The other end of the first resistor (R1) is connected to the positive electrode of the first diode (D1), and the negative end of the first diode (D1) is respectively connected to one end of the second capacitor (C2), the negative electrode of the voltage-stabilizing diode (D3), the gate of the N_MOS tube (Q2), and the PVCC signal end; The other end of one end of the third resistor (R3) is connected to the drain of the N_MOS tube (Q2) and the DXCGQ terminal respectively; The other end of the second capacitor (C2) and the cathode of the voltage-stabilizing diode (D3) are connected to the PGND signal terminal, and the source of the N_MOS tube (Q2) is connected to the GND terminal; The other end of the second resistor (R2) is connected to the anode of the second diode (D2), and the cathode of the second diode (D2) is connected to the gate of the P_MOS tube (Q1), the CVCC signal terminal and the first capacitor (C1); The drain of the P_MOS tube (Q1) is connected to the DXCGQ_1 terminal; The drain of the P_MOS tube (Q1) and the first capacitor (C1) are connected to the PGND terminal; When the wire rope is cut, the PVCC signal terminal is disconnected from the PGND terminal, the first resistor (R1) and the second resistor (R2) are pulled up, the level signal of the PVCC signal terminal changes from a low level signal to a high level signal, the N_MOS tube (Q2) changes from non-conducting to conducting, and the signal of the DXCGQ terminal changes from a high level to a low level. At this time, the single-chip microcomputer receives the signal change of the DXCGQ terminal and sends a disconnection alarm signal; When the wire rope is damaged, the inner core wire is connected to the middle of the wire rope, the CVCC signal terminal is briefly connected to the PGND terminal, the source and drain of the P_MOS tube (Q1) are connected, and the signal at the DXCGQ_1 terminal is pulled up. The microcontroller detects that the level at the DXCGQ_1 terminal changes from low to high and then from high to low, and the microcontroller sends a damage alarm signal.

3. The lock rope state detection and disconnection alarm device according to claim 2, characterized in that: A fuse (F1) is connected between the second capacitor (C2) and the source of the N_MOS tube (Q2).

4. The lock rope state detection and disconnection alarm device according to claim 2, characterized in that: The drain of the P_MOS tube (Q1) is connected to the PGND terminal via a fourth resistor (R4).

5. The lock rope state detection and disconnection alarm device according to claim 2, characterized in that: A first metal block and a second metal block are provided in the lock body, the first metal is connected to the PGND terminal of the detection circuit, the second metal block is located in the self-locking device in the lock body, and the second metal block is connected to the PVCC signal terminal of the detection circuit, the fixed end of the steel wire locking rope passes through the first metal block and is fixedly connected to the first metal block, and is connected to the PGND terminal, and the inner core wire extending outside the fixed end of the steel wire locking rope is connected to the CVCC signal terminal; after the movable end of the steel wire locking rope is inserted into the self-locking device and connected to the second metal block, the movable end of the steel wire locking rope is connected to the PVCC signal terminal.

6. A lock rope state detection and disconnection alarm device according to claim 5, characterized in that: The first metal block, the second metal block and the inner core wire are made of conductive materials.

7. The lock rope state detection and disconnection alarm device according to claim 1, characterized in that: The two ends of the inner core conductor inside the steel wire locking rope are respectively fixedly insulated and connected to the two ends of the steel wire locking rope, and the inner core conductor is a single-core electric wire.

8. The lock rope state detection and disconnection alarm device according to claim 2, characterized in that: It also includes an I / O level detection port, which is electrically connected to the single chip microcomputer, wherein two ports of the I / O level detection port are respectively connected to the DXCGQ terminal and the DXCGQ_1 terminal of the detection circuit.

9. The alarm method of the lock rope state detection and disconnection alarm device according to any one of claims 1 to 8, characterized in that: include: When the wire rope is cut, the inner core wire of the wire rope is disconnected, the PVCC signal terminal is disconnected from the PGND signal terminal, and the level signal of the PVCC signal terminal in the detection circuit is converted from a low-level signal to a high-level signal. The microcontroller detects the level change of the DXCGQ terminal in the detection circuit and issues a disconnection alarm. When the wire rope is damaged, the CVCC signal end of the suspended inner core wire briefly touches the wire rope, and the CVCC signal end and the PGND signal end are briefly connected. The signal at the DXCGQ_1 end will be pulled up. At this time, the microcontroller detects that the level signal at the DXCGQ_1 end changes from low to high and then from high to low, and the microcontroller sends a damage alarm signal.

10. The method for detecting and alarming a broken wire in a locking rope state according to claim 9, characterized in that: When the wire lock rope is cut, the inner core wire connecting the PVCC signal terminal and the PGND signal terminal is disconnected, the first resistor (R1) and the second resistor (R2) are pulled up, the level signal of the PVCC signal terminal is converted from a low level signal to a high level signal, the N_MOS tube Q2 is turned from non-conductive to conductive, and the signal of the DXCGQ terminal is converted from a high level to a low level. At this time, the single chip receives the signal change of the DXCGQ terminal and sends a disconnection alarm signal; When the wire lock rope is damaged, the CVCC signal end connected to the suspended inner core wire briefly touches the wire lock rope, and the CVCC signal end and the PGND end are briefly connected. The source and drain of the P_MOS tube (Q1) are turned on, and the signal at the DXCGQ_1 end will be pulled up. The microcontroller detects that the level of the DXCGQ_1 end changes from low to high and then from high to low, and the microcontroller sends a damage alarm signal.

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