Lock rope state detection and wire breakage alarm device and method

Abstract

The invention relates to a rope locking state detection and broken line alarm device and method. An inner core wire is wrapped in the steel wire lock rope, one end of the inner core wire extends out of the fixed end of the steel wire lock rope, the other end of the inner core wire is suspended inside the movable end of the steel wire lock rope in an insulating mode, and the inner core wire is not communicated with the steel wire lock rope. A single chip microcomputer and a detection circuit are arranged in the lock body, the inner core wire extending to the outer end of the steel wire lock rope is communicated with the CVCC signal end of the detection circuit, and the fixed end of the steel wire lock rope is communicated with the PGND signal end of the detection circuit. The self-locking structure in the lock body is communicated with the PVCC signal end of the detection circuit, and during locking, after the movable end of the steel wire lock rope is connected with the self-locking structure in the lock body, the movable end of the steel wire lock rope is communicated with the PVCC signal end of the detection circuit; at the moment, the PVCC signal end in the detection circuit is connected with the PGND signal end; the input end of the single chip microcomputer is respectively communicated with the DXCGQ end and the DXCGQ1 end of the detection circuit; whether the lock rope is damaged or not is judged by detecting the level change condition, and the safety of the lock is improved.

Description

Technical Field

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

[0002] With the development of electronic technology, smart electronic locks have become more and more popular. The advantages of electronic locks are obviously higher than those of traditional pure mechanical locks, but in terms of padlocks, the lock rope detection alarm function of electronic locks is slightly insufficient. Many electronic padlocks do not have the alarm function of lock rope cutting or damage. They still use the steel beams, iron chains, steel wire lock rope sleeves and other lock rope methods of traditional locks, and cooperate with the lock body to complete the lock, without the lock rope detection alarm function. The existing lock rope detection function of some electronic padlocks is not satisfactory in detection sensitivity, and there are loopholes in safety protection. There is a defect that can be easily avoided by human beings, which poses 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 which can determine whether the lock rope is damaged according to the change of the level in the lock rope, such as determining that the lock rope is damaged and giving a timely alarm.

[0004] To achieve the above-mentioned purpose, the present invention adopts the following technical scheme: 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 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 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; 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 steel wire lock rope is connected to the self-locking structure inside the lock body, and 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 end 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 lock rope is cut, the inner core wire is disconnected, the PVCC signal end is disconnected from the PGND signal end, and the single-chip microcomputer detects that the level of the DXCGQ end in the detection circuit has changed, and a disconnection alarm is issued; when the wire lock rope is damaged, the CVCC signal end connected to the suspended inner core wire briefly touches the wire lock rope. At this time, the single-chip microcomputer detects that the level of the DXCGQ_1 end in the detection circuit has changed, and an alarm that the wire lock rope is damaged is issued.

[0007] Further, the detection circuit includes 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 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 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;

[0009] 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 end 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 tube 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 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 lock rope is cut, the PVCC signal end is disconnected from the PGND end, the first resistor R1 and the second resistor R2 are pulled up, the level signal of the PVCC signal end 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 end is converted from a high level to a low level. At this time, the single-chip microcomputer receives the signal change of the DXCGQ end and sends out a disconnection alarm signal;

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

[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 tube 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, two ends of the inner core conductor inside the steel wire locking rope are respectively fixedly insulated and connected to two ends of the steel wire locking rope, and the inner core conductor is a single-wire 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 lock rope is cut, the inner core wire of the wire lock rope is disconnected, the PVCC signal end is disconnected from the PGND signal end, and the level signal of the PVCC signal end in the detection circuit is converted from a low level signal to a high level signal. The single chip detects that the level of the DXCGQ end in the detection circuit has changed and issues a disconnection alarm.

[0024] When the wire lock rope is damaged, the CVCC signal end connected to the suspended inner core wire briefly touches the wire lock rope, the CVCC signal end and the PGND signal end are briefly connected, and 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 out a damage alarm signal.

[0025] Furthermore, when the steel 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 microcomputer receives the signal change of the DXCGQ terminal and sends a disconnection alarm signal;

[0026] When the steel wire lock rope is damaged, the CVCC signal end connected to the suspended inner core wire briefly touches the steel wire lock rope, 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 out an alarm signal of damage.

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

[0028] The detection circuit and the single-chip microcomputer are connected during locking by an inner core wire in the lock rope. 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 means that the lock rope is damaged. At this time, the single-chip microcomputer controls the alarm device to alarm and remind, which solves the current defect that there is no way to accurately detect the damage of the lock rope. At the same time, an inner core wire is added to the lock rope to serve as a 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 is a schematic diagram of the structure of a lock in an embodiment of the present invention;

[0030] Figure 2 This is a schematic diagram of the structure 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 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 in conjunction with the accompanying drawings and implementation modes.

[0036] Embodiment 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 steel wire lock rope 2, wherein a fixed end 201 of the steel wire lock rope 2 is fixedly connected to the lock body 1, and a movable end 202 of the steel 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 lock rope 2. When the steel wire lock rope is braided, an inner core conductor 3 is braided into the inside of the steel wire lock rope, and the middle part of the inner core conductor is suspended in the steel wire lock rope and is not connected to the steel wire lock rope; the two ends of the inner core conductor 3 are respectively located at the two ends of the steel wire lock rope, and are insulated and fixed to the two ends of the steel wire lock rope; this arrangement does not require the internal inner core conductor to rotate, and only needs to seal the end of the inner core conductor inside the steel wire lock rope so that it is not short-circuited with the outer jacket of the steel wire lock rope; after the braiding is completed, the inner core conductor 3 is located in the middle of the steel wire lock rope; it is easy to manufacture and the cost is relatively low. It solves the current defect that the steel wire lock rope 2 needs to form a back-and-forth loop steel wire lock rope, the steel wire lock rope is difficult to process, the steel wire lock rope becomes thicker, and the manufacturing cost of the steel wire lock rope increases.

[0038] The end of the inner core wire 3 corresponding to the fixed end 201 of the steel wire locking rope 2 extends outside the steel wire locking rope 2 and is connected to the CVCC signal end in the detection circuit in the lock body 1, and the fixed end 201 of the steel wire locking rope is connected to the ground end of the detection circuit in the lock body 1, that is, connected to the PGND end in the detection circuit; when the movable end 202 of the steel 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 steel wire locking rope 2 is connected to the PVCC signal end 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, and both the first metal block and the second metal block are made of metals with good conductive properties such as copper, gold or silver. In this embodiment, a metal block made of copper is used; the first metal block is fixedly arranged in the lock body 1, and the first metal block is connected to the PGND end of the detection circuit in the lock body 1. The fixed end 201 of the steel 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 steel wire lock rope 2 with the PGND end. At the same time, the inner core wire 3 extending from the fixed end of the steel wire lock rope 2 is connected to the CVCC signal end of the detection circuit;

[0039] The second metal block is fixed in the self-locking device of the lock body 1, and 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 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, and the pin 1 of the terminal H3 is connected to the network signal PVCC, the pin 2 of the terminal H3 is connected to the network signal CVCC, and the pin 3 of the terminal H3 is connected to the network signal PGND.

[0040] It also includes an input end of a single-chip microcomputer arranged in the lock body 1, which is connected to the DXCGQ end and the DXCGQ_1 end of the detection circuit respectively. 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 single-chip microcomputer shown includes an I / O level detection port, which is connected to the external I / O pin of the single-chip microcomputer (MCU). The external pin of the MCU is used to detect the change of the analog input voltage level to detect the trigger signal. For example: rising edge trigger, falling edge trigger. As a 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 to be an external core detection signal, and DXCGQ_1 is an internal core detection signal. This embodiment uses the I / O port of the single-product machine to detect the high and low voltage levels, so as to determine whether the wire lock rope is damaged. There is no need to specify the use of a functional ADC port. Save single-chip microcomputer resources and improve 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 conductor in the wire lock rope is connected to the detection circuit, as long as the inner core conductor 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 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 the power interface; the power interface in this embodiment is connected to 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 tube Q2 and the PVCC signal end; the anode of the voltage stabilizing diode D3 is connected to the PGND end, the other end of the second capacitor C2 is connected to the PGND end, one end of the fuse F1 is connected to the PGND end, the other end of the fuse F1 is connected to the GND end, and the fuse is located between the source of the N_MOS tube 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 tube Q2 and the DXCGQ end.

[0045] The other end of the second resistor R2 is connected to the positive electrode of the second diode D2, and the negative electrode of the second diode D2 is connected to the gate of the P_MOS tube Q1, the CVCC signal end and the first capacitor C1; the drain of the P_MOS tube Q1 is connected to the DXCHQ_1 end; 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 end, the inner core wire extending from the fixed end is connected to the CVCC signal end, the movable end of the wire lock rope is connected to the PVCC signal end, and the two input ports of the single-chip microcomputer are respectively connected to the DXCGQ end and the DXCHQ_1 end.

[0046] In this embodiment, by installing N-type and P-type MOS tubes, the lock can achieve low power consumption when locked and in standby for a long time. At the same time, the first capacitor C1 and the second capacitor C2 can filter well. By adjusting the capacitance, the sensitivity of the circuit detection can be adjusted. Even if the outside world uses a large hydraulic pliers to quickly cut the wire rope, it can trigger the inner core wire and the wire rope inside the wire rope to form a closed loop. The purpose of triggering the wire rope alarm is achieved.

[0047] In practical applications, it needs to be used with a single-product machine chip, which is used as the core logic processing chip. If the single-chip microcomputer is powered by 3.3V, the entire power supply port is powered by 3.3V. If it is powered by 5V, the entire power supply port is powered by 5V. It has strong versatility and does not have specific requirements for the specific model of the single-chip microcomputer. The network signal DXCGQ and DXCGQ_1 terminals can be connected to two independent I / O ports of the single-product machine, and the analog level method is used to collect the rising or falling edge. Then the triggered signal can be tested and detected.

[0048] In the circuit, the function of the resettable fuse F1 is to prevent a large current from flowing into the lock body from the external wire lock rope, thus protecting the stability of the lock body. Therefore, the current limit of F1 should be as small as possible, and a 50mA overcurrent protection fuse is selected in the schematic diagram.

[0049] The pull-up circuit composed of the first resistor R1 and the first diode D1 is used to prevent short-circuit current when the PVCC network signal is connected to the PGND network signal. On the other hand, it is used to prevent the external steel wire lock rope from being maliciously charged with voltage and flowing back into the lock body. Therefore, the diode is indispensable.

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

[0051] The second capacitor C2 and the first capacitor C1 have the function of providing filtering to prevent the circuit voltage from fluctuating. On the other hand, the two capacitors cooperate with the first resistor R1 and the first diode D1, the second resistor R2 and the second diode D2 respectively. The charging and discharging rates can be controlled, so that the trigger waveform has clear and complete upper and lower trigger edges. This can prevent the waveform speed from changing too fast and exceeding the detection reaction time of the single-chip microcomputer.

[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 tube is used at Q2 because the lock is low power. Therefore, when the lock is normally locked, the N_MOS tube at Q2 is turned on to reduce the current discharge to the ground. The P_MOS tube is used at Q1 to reduce power consumption, because under normal circumstances, the P_MOS tube at Q1 is turned off, which is also to reduce the current release to the ground.

[0054] The resistance of the first resistor R1 and the second resistor R2 can be adjusted according to the length of the wire rope. Specifically, the longer the wire rope is, the smaller the resistance is. This can compensate for the resistance of the wire rope. Because it is an analog level control trigger, it is not an absolute fixed value. After appropriate adjustment, it can meet the level detection range of the microcontroller. For example: the boundary value of the detection level of a 3.3V powered microcontroller is around 2.8V.

[0055] In this embodiment, since a positive detection inner core wire is added inside the steel wire lock rope, even if the two ends of the lock steel wire lock rope are short-circuited manually and then the steel wire lock rope is cut, the inner core steel wire lock rope detection alarm will be triggered. At the same time, because the inner core is a positive pole, in actual use tests, as long as the inner core cable conductor is touched manually, it is possible to cause the voltage level 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 movable end of the wire lock rope is out of contact with the second metal block, and the PVCC signal end is no longer connected to the PGND end through the inner core wire. Due to the pull-up effect of the first resistor R1 and the first diode D1, the level signal of the PVCC signal end is high at this time. N_MOS tube Q2 is turned on at this time, that is, the source and drain of N_MOS tube Q2 are turned on. The network signal at the DXCGQ end is pulled down to ground, and the detection level of the I / O port of the microcontroller connected to this signal is low at this time. Due to the pull-up effect of the second resistor R2 and the second diode D2, the gate of the P_MOS tube Q1 is not turned on by the source and drain of the P_MOS tube Q1. Due to the existence of the fourth pull-down resistor R4, the network signal at the DXCGQ_1 end has a low detection level at this time.

[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 end is connected to the PGND end through the inner core wire. This is equivalent to pulling the signal of the PVCC signal end to the ground. Due to the existence of the first resistor R1 and the first diode D1, the circuit VCC_3.3V is not directly short-circuited to the ground. At this time, the level signal of the PVCC signal end is low. The N_MOS tube Q2 is turned off at this time, that is, the source and drain of the N_MOS tube Q2 are not conducting. The network signal at the DXCGQ end is pulled up by the third resistor R3, and the detection level of the I / O port of the microcontroller connected to this signal is high at this time. The situation of the P_MOS tube Q1 remains unchanged, and the network signal state at the DXCGQ_1 end has not changed.

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

[0062] If the wire rope is damaged and disconnected at any point in the middle, the network signal at the PVCC signal end is no longer connected to the network signal at the PGND end through the inner core wire in the wire rope. Due to the pull-up effect of the first resistor R1 and the first diode D1, the level signal at the PVCC signal end is converted from low level to high level, and the N_MOS tube Q2 is changed from non-conductive to conductive, that is, the source and drain of the N_MOS tube Q2 are changed from non-conductive to conductive, and the network signal at the DXCGQ end is changed from high level to low level. At this time, the I / O port of the microcontroller connected to this signal detects the level to the corresponding level change, which will trigger the wire rope disconnection alarm. Due to the pull-up effect of the second resistor R2 and the second diode D2, the gate of the P_MOS tube Q1 has a non-conductive source and drain. However, when the steel wire lock rope is damaged and the inner core wire is cut, the network signal at the CVCC signal end will be short-circuited with the PGND signal on the steel wire for a short time, and the gate of the P_MOS tube Q1 will have a low-level signal. The source and drain of the P_MOS tube Q1 will be turned on, causing the network signal at the DXCGQ_1 end to be pulled up. At this time, the I / O port detection level of the microcontroller connected to this signal will detect the level change from low to high and then from high to low. This level change signal will trigger the wake-up of the microcontroller and send the corresponding alarm information. The detection and alarm function of the steel wire lock rope is completed.

[0063] When the wire lock rope is unlocked, it is connected to the network signal at the PGND end, and the low level does not have a high electromotive force. After the lock is closed, although it is connected to the network signal at the PVCC signal end, it is a low-level signal that is pulled down. Therefore, the wire lock rope is still at a low level, without a high electromotive force and voltage difference. Therefore, the level voltage value on the wire lock rope will not be detected. This greatly avoids the possibility of artificially identifying the level to deliberately simulate the level damage.

[0064] The above embodiments are merely examples of the present invention and do not limit the protection scope of the present invention. All designs that are the same or similar to the present invention fall within the protection scope 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 located inside the locking rope is not 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 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; 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 steel wire lock rope is connected to the self-locking structure inside the lock body, and 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 end of the single-chip microcomputer is respectively connected to the DXCGQ terminal and the DXCGQ_1 terminal 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 PGND signal end, and the single-chip microcomputer detects that the level of the DXCGQ end in the detection circuit has changed, and a disconnection alarm is issued; when the wire lock rope is damaged, the CVCC signal end connected to the suspended inner core wire briefly touches the wire lock rope. At this time, the single-chip microcomputer detects that the level of the DXCGQ_1 end in the detection circuit has changed, and an alarm that the wire lock rope is damaged is issued.

2. The lock rope state detection and disconnection alarm device according to claim 1, characterized in that: The detection circuit includes 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 the power interface; 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 other end of one end of the third resistor R3 is connected to the drain of the N_MOS tube Q2 and the DXCGQ end 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 transistor Q1, the CVCC signal terminal and the first capacitor C1; The drain of 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 lock rope is cut, the PVCC signal end is disconnected from the PGND end, the first resistor R1 and the second resistor R2 are pulled up, the level signal of the PVCC signal end 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 end is converted from a high level to a low level. At this time, the single-chip microcomputer receives the signal change of the DXCGQ end and sends out a disconnection alarm signal; When the steel wire lock rope is damaged, the inner core wire is connected to the middle part of the steel wire lock rope, the CVCC signal end is briefly connected to the PGND end, the source and drain of the P_MOS tube Q1 are connected, and the signal at the DXCGQ_1 end will be pulled up. The microcontroller detects that the level at the DXCGQ_1 end changes from low to high and then from high to low, and the microcontroller sends out an alarm signal of damage.

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

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

5. According to claim 2, a lock rope state detection and disconnection alarm device is 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 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.

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 device for detecting and alarming a broken wire when locking a rope 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-wire core electric wire.

8. The device for detecting and alarming a broken wire when locking a rope 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. A method for detecting a broken wire and alarming a locked wire, characterized in that: include: When the wire lock rope is cut, the inner core wire of the wire lock rope is disconnected, the PVCC signal end is disconnected from the PGND signal end, and the level signal of the PVCC signal end in the detection circuit is converted from a low level signal to a high level signal. The single chip detects that the level of the DXCGQ end in the detection circuit has changed and issues a disconnection alarm. When the wire lock rope is damaged, the CVCC signal end connected to the suspended inner core wire briefly touches the wire lock rope, the CVCC signal end and the PGND signal end are briefly connected, and 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 out a damage alarm signal.

10. The method for detecting a broken wire and alarming 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 end and the PGND signal end is disconnected, the first resistor R1 and the second resistor R2 are pulled up, the level signal of the PVCC signal end 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 end is converted from a high level to a low level. At this time, the single-chip microcomputer receives the signal change of the DXCGQ end and sends a disconnection alarm signal; When the steel wire lock rope is damaged, the CVCC signal end connected to the suspended inner core wire briefly touches the steel wire lock rope, 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 out an alarm signal of damage.

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