Remote electronic lock state detector
By integrating sensors and logic circuits into the electronic wheel lock, remote detection and alarm of the clamping arm angle and distance are achieved, solving the problem that users cannot know in time that the wheel lock has been pried open, and providing remote status monitoring and power control functions.
Patent Information
- Application Number
- CN202521465207.6
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-07-14
- Publication Date
- 2026-03-20
- Estimated Expiration
- 2035-07-14
AI Technical Summary
When existing electronic wheel locks are pried open, users cannot know in time, resulting in the wheel lock being damaged without any notification.
It employs a first angle sensor, a second angle sensor, a distance sensor, a signal processing circuit, a logic judgment circuit, a control circuit, a wireless communication module, and a power management module to achieve remote status detection and alarm by detecting changes in the angle and distance of the clamping arm.
When the angle or distance of the clamping arm is abnormal, a buzzer will sound and the user will be notified remotely to ensure that the user is aware of the wheel lock status in a timely manner and can control the power management module to turn on and off.
Smart Images
Figure CN224013309U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of electronic lock technology, and in particular to a remote electronic lock status detector. Background Technology
[0002] Electronic wheel locks are security devices used to prevent vehicle theft or tampering. They prevent the vehicle from moving by locking the rotation of the wheels, thus serving as anti-theft and anti-movement measures. Wheel locks are typically made of sturdy metal, possessing high strength and resistance to damage, effectively resisting external forces. Their design principle involves using the lock body structure to lock the wheel hub or tire, restricting wheel rotation. Wheel locks are generally installed on the front or rear wheels of the vehicle, with the specific location depending on the vehicle type and usage scenario. When using wheel locks, ensure they are securely installed and regularly check the integrity and reliability of the lock body to ensure their anti-theft effectiveness.
[0003] Current electronic wheel locks, such as Figure 1 As shown, it includes a left clamping arm 1 and a right clamping arm 2 that are hinged together, a movable clamping arm 4 mounted on the right clamping arm 2, a chuck base 5 that is hinged to the movable clamping arm 4 at the end away from the right clamping arm 2, and a handle 3 that is fixedly connected to the left clamping arm 1 and the right clamping arm 2. An electronic lock is provided between the left clamping arm 1 and the right clamping arm 2.
[0004] Current electronic wheel locks can provide a good locking effect, but they are not immune to being pried open. Because they are independent units, users are often unaware when they are pried open, resulting in the wheel lock being damaged without any warning.
[0005] Therefore, a remote electronic lock status detector is proposed to solve or alleviate the above problems. Utility Model Content
[0006] The purpose of this invention is to address the shortcomings of existing technologies by proposing a remote electronic lock status detector.
[0007] To achieve the above objectives, the present invention adopts the following technical solution:
[0008] A remote electronic lock status detector includes a first angle sensor, a second angle sensor, a distance sensor, a signal processing circuit, a logic judgment circuit, a control circuit, a wireless communication module, and a power management module.
[0009] The first angle sensor and the second angle sensor are arranged at the rotation joint axis of the left and right clamping arms respectively and collect the clamping angle signals, the distance sensor is arranged in the chuck base and collects the distance between the chuck base and the hub end face, the output terminals of the first angle sensor, the second angle sensor and the distance sensor are connected with the input terminal of the signal processing circuit, the output terminal of the signal processing circuit is connected with the input terminal of the logic judgment circuit, the output terminal of the logic judgment circuit is connected with the input terminal of the control circuit, the control circuit is connected with the wireless communication module, the power management module supplies power for the first angle sensor, the second angle sensor and the distance sensor, and the power management module is coupled with the control circuit.
[0010] Preferably, the delay control circuit, the alarm driving circuit and the buzzer are further included, the input terminal of the delay control circuit is connected with the output terminal of the logic judgment circuit, the output terminal of the delay control circuit is connected with the input terminal of the alarm driving circuit, and the alarm driving circuit is coupled with the buzzer and controls the working of the buzzer.
[0011] Preferably, the signal processing circuit includes an LM339 four-way comparator, the first input terminal, the second input terminal and the third input terminal of the LM339 four-way comparator are connected with the output terminals of the distance sensor, the first angle sensor and the second angle sensor respectively, the reference terminal of the LM339 four-way comparator is connected with a 2.5V reference through a voltage dividing network, and the first output terminal, the second output terminal and the third output terminal of the LM339 four-way comparator are connected with the input terminal of the logic judgment circuit.
[0012] Preferably, the logic judgment circuit includes a CD4081 four-AND gate chip, the first primary input terminal and the second primary input terminal of the CD4081 four-AND gate chip are connected with the first output terminal and the second output terminal of the LM339 four-way comparator in the signal processing circuit respectively, the first output terminal of the CD4081 four-AND gate chip is connected with the first secondary input terminal of the CD4081 four-AND gate chip, the second secondary input terminal of the CD4081 four-AND gate chip is connected with the third output terminal of the LM339 four-way comparator in the signal processing circuit, and the second output terminal of the CD4081 four-AND gate chip is connected with the input terminals of the delay control circuit and the control circuit.
[0013] Preferably, the control circuit comprises an STM32F407VGT6 controller, the wireless communication module comprises an HC-05 Bluetooth module, the power management module comprises a battery pack, a triode and a first relay, the output end of the control circuit is connected with the base of the triode, the emitter of the triode is grounded, the collector of the triode is connected with one end of the coil of the first relay, the other end of the coil of the first relay is connected with electricity, one end of the normally open contact of the first relay is connected with the battery pack, and the other end of the normally open contact of the first relay is connected to the power supply end of the first angle sensor, the second angle sensor and the distance sensor.
[0014] Preferably, the delay control circuit comprises a first NE555 timer, a second NE555 timer, a first delay resistor and a first delay capacitor, the trigger end of the first NE555 timer is connected with the second output end of a CD4081 four AND gate chip, the threshold end of the first NE555 timer is connected with electricity through the first delay resistor, the discharge end of the first NE555 timer is connected with the first delay capacitor and then grounded, and the trigger end of the second NE555 timer is connected with the output end of the first NE555 timer.
[0015] Preferably, the alarm driving circuit comprises a TIP122 Darlington tube and a second relay, the base of the TIP122 Darlington is connected with the output end of the second NE555 timer in the delay control circuit, the emitter of the TIP122 Darlington is grounded, the collector of the TIP122 Darlington is connected with the positive electrode of the coil of the second relay, the negative electrode of the coil of the second relay is grounded, the positive electrode of the buzzer is connected with the battery pack in the power management module in series with the normally open contact of the second relay, and the negative electrode of the buzzer is grounded.
[0016] The utility model has the following beneficial effects:
[0017] When the distance between the chuck base and the hub is too large or any clamping arm angle offset exceeds 5 degrees, the comparator level flips to trigger the interlocking logic gate, the buzzer is driven to sound and the relay is switched to the continuous power supply alarm state after 10 seconds of delay confirmation, and before the buzzer works, information can be remotely transmitted through the control circuit and the wireless communication module, so that the user of the electronic wheel lock can know whether the electronic wheel lock is pried at the moment, and the user can control the power management module on-off through the wireless communication module, so that the state control of the electronic wheel lock is realized. BRIEF DESCRIPTION OF DRAWINGS
[0018] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the drawings needed to be used in the embodiments will be briefly introduced as follows. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of the drawings.
[0019] Figure 1 A structural schematic diagram of an electronic wheel lock in the prior art;
[0020] Figure 2 A structural block diagram of the present application.
[0021] In the figure, 1 is a left clamping arm, 2 is a right clamping arm, 3 is a handle, 4 is a movable clamping arm, 5 is a chuck base, 6 is a first angle sensor, 7 is a second angle sensor, 8 is a distance sensor, 9 is a signal processing circuit, 10 is a logic judgment circuit, 11 is a delay control circuit, 12 is an alarm driving circuit, 13 is a buzzer, 14 is a control circuit, 15 is a wireless communication module, and 16 is a power management module. DETAILED DESCRIPTION
[0022] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application will be clearly and completely described below in combination with the drawings in the embodiments of the present application. Obviously, the described embodiments are only some of the embodiments of the present application, rather than all the embodiments. The components of the embodiments of the present application described and shown in the drawings herein can be arranged and designed in various different configurations.
[0023] Therefore, the following detailed description of the embodiments of the present application provided in the drawings is not intended to limit the scope of the claimed present application, but only represents selected embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of the present application.
[0024] It should be noted that: similar reference numerals and letters represent similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.
[0025] In the description of the utility model, it is necessary to understand that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer" and the like is based on the orientation or positional relationship shown in the drawings, or is the orientation or positional relationship commonly placed when the utility model product is used, or is the orientation or positional relationship commonly understood by those skilled in the art, and is merely for the convenience of describing the utility model and simplifying the description, and therefore cannot be understood as indicating or implying that the indicated device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the utility model.
[0026] In addition, the terms "first", "second", "third" and the like are merely used for differentiation in description and cannot be understood as indicating or implying relative importance.
[0027] In the description of the utility model, it is also necessary to explain that, unless otherwise explicitly specified and limited, the terms "arrangement", "installation", "connection", "connection" should be understood broadly, for example, it can be fixedly connected, or it can be detachably connected, or integrally connected, it can be mechanically connected, or it can be electrically connected, it can be directly connected, or it can be indirectly connected through an intermediate medium, it can be the communication inside two elements. For those skilled in the art, the specific meaning of the above terms in the utility model can be understood according to the specific circumstances.
[0028] A remote electronic lock state detector, as shown in Figure 2 Fig. 1, comprises a first angle sensor 6, a second angle sensor 7, a distance sensor 8, a signal processing circuit 9, a logic judgment circuit 10, a control circuit 14, a wireless communication module 15, a power management module 16, a delay control circuit 11, an alarm driving circuit 12, and a buzzer 13.
[0029] The first angle sensor 6 and the second angle sensor 7 are respectively arranged at the rotation joint shaft center of the left and right clamping arms 2 and collect the included angle signals, the distance sensor 8 is arranged in the chuck base 5 and is used for collecting the distance between the chuck base 5 and the hub end face and collecting the distance signal, the output ends of the first angle sensor 6, the second angle sensor 7 and the distance sensor 8 are connected with the input end of the signal processing circuit 9, the output end of the signal processing circuit 9 is connected with the input end of the logic judgment circuit 10, the output end of the logic judgment circuit 10 is connected with the input end of the control circuit 14, the control circuit 14 is connected with the wireless communication module 15, the power management module 16 supplies power for the first angle sensor 6, the second angle sensor 7 and the distance sensor 8, the power management module 16 is coupled with the control circuit 14, the input end of the delay control circuit 11 is connected with the output end of the logic judgment circuit 10, the output end of the delay control circuit 11 is connected with the input end of the alarm driving circuit 12, the alarm driving circuit 12 is coupled with the buzzer 13 and controls the working of the buzzer 13.
[0030] The signal processing circuit 9 comprises a LM339 four-way comparator, the first input end, the second input end and the third input end of the LM339 four-way comparator are connected with the output end of the distance sensor 8, the first angle sensor 6 and the second angle sensor 7 respectively, the reference end of the LM339 four-way comparator is connected with a 2.5V reference through a voltage dividing network, and the first output end, the second output end and the third output end of the LM339 four-way comparator are all connected with the input end of the logic judgment circuit 10.
[0031] The logic judgment circuit 10 comprises a CD4081 four-way AND gate chip, the first primary input end and the second primary input end of the CD4081 four-way AND gate chip are connected with the first output end and the second output end of the LM339 four-way comparator in the signal processing circuit 9 respectively, the first output end of the CD4081 four-way AND gate chip is connected with the first secondary input end of the CD4081 four-way AND gate chip, the second secondary input end of the CD4081 four-way AND gate chip is connected with the third output end of the LM339 four-way comparator in the signal processing circuit 9, and the second output end of the CD4081 four-way AND gate chip is connected with the input end of the delay control circuit 11 and the control circuit 14.
[0032] The control circuit 14 comprises an STM32F407VGT6 controller, the wireless communication module 15 comprises an HC-05 Bluetooth module, the power management module 16 comprises a battery pack, a triode and a first relay, the output end of the control circuit 14 is connected with the base of the triode, the emitter of the triode is grounded, the collector of the triode is connected with one end of the coil of the first relay, the other end of the coil of the first relay is connected with electricity, one end of the normally open contact of the first relay is connected with the battery pack, the other end of the normally open contact of the first relay is connected with the power supply end of the first angle sensor 6, the second angle sensor 7 and the distance sensor 8, when the STM32F407VGT6 controller is connected with the HC-05 Bluetooth module, the TX pin, the RX pin, the GND pin, the VCC pin, the state pin and the EN / KEY pin of the HC-05 Bluetooth module are connected with the PD9 pin, the PD8 pin, the GND pin, the 3.3V pin, the PC10 pin and the PC11 pin of the STM32F407VGT6 controller respectively, and when the STM32F407VGT6 controller is connected with the CD4081 four-way AND gate chip, the 2Y pin of the CD4081 four-way AND gate chip is connected with the PA0 pin of the STM32F407VGT6 controller.
[0033] The delay control circuit 11 comprises a first NE555 timer, a second NE555 timer, a first delay resistor and a first delay capacitor, the trigger end of the first NE555 timer is connected with the second output end of a CD4081 four AND gate chip, the threshold end of the first NE555 timer is connected with the first delay resistor, the discharge end of the first NE555 timer is connected with the first delay capacitor and then grounded, the trigger end of the second NE555 timer is connected with the output end of the first NE555 timer, and the output end of the second NE555 timer is connected with the input end of the alarm driving circuit 12.
[0034] The alarm driving circuit 12 comprises a TIP122 Darlington tube and a second relay, the base of the TIP122 Darlington tube is connected with the output end of the second NE555 timer in the delay control circuit 11, the emitter of the TIP122 Darlington tube is grounded, the collector of the TIP122 Darlington tube is connected with the positive electrode of the coil of the second relay, the negative electrode of the coil of the second relay is grounded, the positive electrode of the buzzer 13 is connected with the battery pack in the power management module 16 through the normally open contact of the second relay in series, and the negative electrode of the buzzer 13 is grounded.
[0035] When the wheel lock is locked, the chuck base 5 is attached to the end surface of the wheel hub, the resistance value of the distance sensor 8 is reduced, and the output signal is output to the LM339 four-way comparator.
[0036] Meanwhile, the left and right clamping arms 2 are accurately clamped into the hollowed grooves of the wheel hub, the first angle sensor 6 and the second angle sensor 7 installed at the clamping arm rotating shaft and being AS5040 double magnetic angle sensors output a signal greater than 3V to the LM339 four-way comparator when the clamping arm angle deviation is less than or equal to 5° by detecting the position of the rotating magnet.
[0037] At this time, the LM339 four-way comparator takes the reference voltage as the reference, all input channels meet the threshold condition, the distance sensor 8 normally outputs a high level, and the clamping arm angle normally synchronously outputs a high level.
[0038] The state signal enters the CD4081 four AND gate chip of the logic judgment circuit 10, the normally output high level of the distance sensor 8 and the normally synchronous output high level of the left clamping arm 1 angle make the first output end of the CD4081 four AND gate chip output a high level, and the normally synchronous output high level of the right clamping arm 2 angle makes the second output end of the CD4081 four AND gate chip output a high level.
[0039] Since the second output end of the CD4081 four AND gate chip maintains a high level, the trigger end of the first NE555 timer in the rear stage is not triggered, the normally open contact of the second relay cannot be connected with the battery pack at this time, and therefore the buzzer 13 cannot work.
[0040] Meanwhile, the high level output from the second output end of the CD4081 four AND gate chip is input to the STM32F407VGT6 controller, and the STM32F407VGT6 controller is connected with the user's mobile phone or other mobile terminal (such as a tablet computer) capable of Bluetooth communication through the wireless communication module 15.
[0041] When the prying action occurs, any sensor anomaly triggers the alarm chain, if the distance sensor 8 and the wheel hub spacing changes, the resistance rises, the voltage received by the LM339 four-way comparator drops, and the high level flips to low level.
[0042] If the left arm 1 is violently prying and the angle deviation is greater than 5°, the AS5040 dual magnetic angle sensor outputs less than 1V, which makes the high level flip to low level, and the right arm 2 anomaly causes the high level to flip.
[0043] Any of the above anomalies will break the logic balance of the CD4081 four AND gate chip, for example, when the left arm 1 is abnormal, the CD4081 four AND gate chip outputs low level. The falling edge signal triggers the first NE555 timer, and starts a 10-second delay, if the anomaly persists, a high level is output after the delay to trigger the second NE555 timer.
[0044] The second NE555 timer outputs a 1Hz square wave to drive the base of the TIP122 Darlington tube, making the collector electrode conduct current, and the second relay drives the buzzer 13 to produce a 110dB sound pressure alarm.
[0045] And the low level signal output from the CD4081 four AND gate chip is given to the STM32F407VGT6 controller, and the STM32F407VGT6 controller can communicate wirelessly through the wireless communication module 15, and the STM32F407VGT6 controller can control the first relay, specifically, the GPIO pin of the STM32F407VGT6 controller is connected with the base of the transistor, thereby completing the power supply on-off connection of the battery pack to the first angle sensor 6, the second angle sensor 7, the distance sensor 8, and the buzzer 13.
[0046] The above only describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can be variously changed and modified. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.
Claims
1. A remote electronic lock status detector, characterized in that, It includes a first angle sensor (6), a second angle sensor (7), a distance sensor (8), a signal processing circuit (9), a logic judgment circuit (10), a control circuit (14), a wireless communication module (15), and a power management module (16); The first angle sensor (6) and the second angle sensor (7) are respectively set at the rotation joint axis of the left and right clamping arms (2) and collect the included angle signal. The distance sensor (8) is set in the chuck base (5) and is used to collect the distance between it and the end face of the wheel hub and collect the distance signal. The output terminals of the first angle sensor (6), the second angle sensor (7), and the distance sensor (8) are connected to the input terminal of the signal processing circuit (9). The output terminal of the signal processing circuit (9) is connected to the input terminal of the logic judgment circuit (10). The output terminal of the logic judgment circuit (10) is connected to the input terminal of the control circuit (14). The control circuit (14) is connected to the wireless communication module (15). The power management module (16) supplies power to the first angle sensor (6), the second angle sensor (7), and the distance sensor (8). The power management module (16) is coupled to the control circuit (14).
2. The remote electronic lock status detector according to claim 1, characterized in that, It also includes a delay control circuit (11), an alarm drive circuit (12), and a buzzer (13). The input terminal of the delay control circuit (11) is connected to the output terminal of the logic judgment circuit (10), the output terminal of the delay control circuit (11) is connected to the input terminal of the alarm drive circuit (12), and the alarm drive circuit (12) is coupled to the buzzer (13) and controls its operation.
3. A remote electronic lock status detector according to claim 2, characterized in that, The signal processing circuit (9) includes an LM339 quad comparator. The first, second, and third input terminals of the LM339 quad comparator are connected to the output terminals of the distance sensor (8), the first angle sensor (6), and the second angle sensor (7), respectively. The reference terminal of the LM339 quad comparator is connected to a 2.5V reference through a voltage divider network. The first, second, and third output terminals of the LM339 quad comparator are all connected to the input terminals of the logic judgment circuit (10).
4. A remote electronic lock status detector according to claim 2, characterized in that, The logic judgment circuit (10) includes a CD4081 quad AND gate chip. The first primary input terminal and the second primary input terminal of the CD4081 quad AND gate chip are respectively connected to the first output terminal and the second output terminal of the LM339 quad comparator in the signal processing circuit (9). The first output terminal of the CD4081 quad AND gate chip is connected to the first stage input terminal of the CD4081 quad AND gate chip. The second stage input terminal of the CD4081 quad AND gate chip is connected to the third output terminal of the LM339 quad comparator in the signal processing circuit (9). The second output terminal of the CD4081 quad AND gate chip is connected to the input terminals of the delay control circuit (11) and the control circuit (14).
5. A remote electronic lock status detector according to claim 2, characterized in that, The control circuit (14) includes an STM32F407VGT6 controller, the wireless communication module (15) includes an HC-05 Bluetooth module, and the power management module (16) includes a battery pack, a transistor, and a first relay. The output terminal of the control circuit (14) is connected to the base of the transistor, the emitter of the transistor is grounded, the collector of the transistor is connected to one end of the coil of the first relay, the other end of the coil of the first relay is energized, the battery pack is connected to one end of the normally open contact of the first relay, and the other end of the normally open contact of the first relay is connected to the power supply terminals of the first angle sensor (6), the second angle sensor (7), and the distance sensor (8).
6. A remote electronic lock status detector according to claim 2, characterized in that, The delay control circuit (11) includes a first NE555 timer, a second NE555 timer, a first delay resistor, and a first delay capacitor. The trigger terminal of the first NE555 timer is connected to the second output terminal of the CD4081 quad AND gate chip. The threshold terminal of the first NE555 timer is powered through the first delay resistor. The discharge terminal of the first NE555 timer is connected to the first delay capacitor and then grounded. The trigger terminal of the second NE555 timer is connected to the output terminal of the first NE555 timer. The output terminal of the second NE555 timer is connected to the input terminal of the alarm drive circuit (12).
7. A remote electronic lock status detector according to claim 2, characterized in that, The alarm drive circuit (12) includes a TIP122 Darlington transistor and a second relay. The base of the TIP122 Darlington transistor is connected to the output terminal of the second NE555 timer in the delay control circuit (11). The emitter of the TIP122 Darlington transistor is grounded. The collector of the TIP122 Darlington transistor is connected to the positive terminal of the coil of the second relay. The negative terminal of the coil of the second relay is grounded. The positive terminal of the buzzer (13) is connected in series with the normally open contact of the second relay and then connected to the battery pack in the power management module (16). The negative terminal of the buzzer (13) is grounded.