Lane monitoring equipment

Abstract

The utility model provides lane monitoring equipment, and belongs to the technical field of lane monitoring. The lane monitoring equipment comprises a main control module, a first vehicle detection module, a second vehicle detection module, a switch module, a license plate recognition module and a communication module, the first vehicle detection module is arranged at a ramp entrance, and the second vehicle detection module is arranged at the position of a barrier; the first vehicle detection module and the second vehicle detection module are both connected with the main control module, and the first vehicle detection module and the second vehicle detection module are both used for detecting vehicles; the control end of the switch module is connected with the master control module, the first end of the switch module is connected with a power supply, and the second end of the switch module is connected with the license plate recognition module which is connected with the master control module. The master control module is in communication connection with a terminal through the communication module. The problem that traditional lane monitoring equipment has limitation can be solved.

Description

Technical Field

[0001] The present disclosure relates to the technical field of lane monitoring, and in particular to a lane monitoring device. Background Art

[0002] With the rapid development of intelligent transportation systems, traditional lane monitoring equipment can no longer meet the increasingly complex traffic management needs. Especially in key areas such as highway ramps and toll stations, the rapid flow and efficient management of vehicles have put forward higher requirements for the real-time, accuracy and intelligence level of the monitoring system.

[0003] Traditional monitoring methods, such as manual monitoring or single-function detection equipment, have obvious limitations. They often cannot fully cover the entire process of vehicle driving, especially in the critical stage from the vehicle entering the ramp to passing the barrier machine. There are many monitoring blind spots and slow response speeds, making it difficult to ensure real-time acquisition of vehicle information and timely handling of abnormal situations. In addition, traditional systems lack intelligent linkage mechanisms and have low resource utilization efficiency, making it difficult to achieve energy conservation and consumption reduction while ensuring monitoring effects. Utility Model Content

[0004] The embodiments of the present disclosure provide a lane monitoring device to solve the problem of limitations of traditional lane monitoring devices.

[0005] The present disclosure provides a lane monitoring device, including:

[0006] A main control module, a first vehicle detection module, a second vehicle detection module, a switch module, a license plate recognition module and a communication module;

[0007] The first vehicle detection module is arranged at the ramp entrance, and the second vehicle detection module is arranged at the barrier machine position;

[0008] The first vehicle detection module and the second vehicle detection module are both connected to the main control module, and the first vehicle detection module and the second vehicle detection module are both used to detect vehicles;

[0009] The control end of the switch module is connected to the main control module, the first end of the switch module is used to connect to the power supply, the second end of the switch module is connected to the license plate recognition module, and the license plate recognition module is connected to the main control module;

[0010] The main control module is connected to the terminal through the communication module.

[0011] In an exemplary embodiment of the present disclosure, the first vehicle detection module and the second vehicle detection module have the same structure, and the first vehicle detection module includes a pulse generating circuit, a vehicle detection circuit and a vehicle determination circuit;

[0012] The pulse generating circuit is connected to the input end of the vehicle detection circuit, the output end of the vehicle detection circuit is connected to the input end of the vehicle judgment circuit, and the output end of the vehicle judgment circuit is connected to the main control module.

[0013] In an exemplary embodiment of the present disclosure, the pulse generating circuit includes a controller U1, a resistor R1, a variable resistor RP1 and a capacitor C3;

[0014] The first end of the resistor R1 is connected to the VCC power supply, the second end of the resistor R1 is connected to the discharge end of the controller U1, the second end of the resistor R1 is connected to the first end of the variable resistor RP1, the second end of the variable resistor RP1 is grounded through the capacitor C3, the sliding end of the variable resistor RP1 is connected to the first trigger end of the controller U1, the second trigger end of the controller U1 is connected to the first trigger end of the controller U1, the power supply end of the controller U1 is connected to the VCC power supply, and the output end of the controller U1 is connected to the input end of the vehicle detection circuit.

[0015] In an exemplary embodiment of the present disclosure, the pulse generating circuit further includes a transistor Q1 and a transistor Q2;

[0016] The base of the transistor Q1 is connected to the output end of the controller U1, the base of the transistor Q1 is connected to the base of the transistor Q2, the collector of the transistor Q1 is connected to the VDD power supply, the emitter of the transistor Q1 is connected to the emitter of the transistor Q2, the collector of the transistor Q2 is grounded, and the emitter of the transistor Q2 is connected to the input end of the vehicle detection circuit.

[0017] In an exemplary embodiment of the present disclosure, the vehicle detection circuit includes a detection coil L1, a resistor R4, an operational amplifier U2, a resistor R6, and a resistor R5;

[0018] The first end of the detection coil L1 serves as the input end of the vehicle detection circuit, the second end of the detection coil L1 is grounded, the first end of the detection coil L1 is connected to the non-inverting input end of the operational amplifier U2 through the resistor R4, the inverting input end of the operational amplifier U2 is grounded through the resistor R6, the output end of the operational amplifier U2 is connected to the inverting input end of the operational amplifier U2 through the resistor R5, and the output end of the operational amplifier U2 is connected to the input end of the vehicle judgment circuit.

[0019] In an exemplary embodiment of the present disclosure, the vehicle determination circuit includes an operational amplifier U3, a NOT gate U4, a NOT gate U5, and a trigger U6;

[0020] The non-inverting input terminal of the operational amplifier U3 is connected to the output terminal of the vehicle detection circuit, the inverting input terminal of the operational amplifier U3 is connected to the Vr reference voltage, the output terminal of the operational amplifier U3 is connected to the input terminal of the NOT gate U4, the output terminal of the NOT gate U4 is connected to the input terminal of the NOT gate U5, the output terminal of the NOT gate U5 is connected to the input terminal of the trigger U6, the clock terminal of the trigger U6 is connected to the output terminal of the operational amplifier U3, and the output terminal of the trigger U6 is connected to the main control module.

[0021] In an exemplary embodiment of the present disclosure, the switch module includes a switch tube Q4, a resistor R8, a capacitor C6 and a transistor Q3;

[0022] The control end of the switch tube Q4 is connected to the main control module, the first end of the switch tube Q4 is connected to the VCC power supply, the second end of the switch tube Q4 is connected to the first end of the capacitor C6 through the resistor R8, the second end of the capacitor C6 is grounded, the first end of the capacitor C6 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to the VCC power supply, and the emitter of the transistor Q3 is connected to the license plate recognition module.

[0023] In an exemplary embodiment of the present disclosure, the switch module further includes a switch tube Q5;

[0024] The control end of the switch tube Q5 is connected to the control end of the switch tube Q4, the first end of the switch tube Q5 is connected to the first end of the capacitor C6, and the second end of the switch tube Q5 is grounded.

[0025] The lane monitoring device provided by the embodiment of the present disclosure has the following beneficial effects:

[0026] The disclosed embodiment realizes efficient monitoring and management of vehicles in the lane through the first vehicle detection module, the second vehicle detection module, the switch module, the license plate recognition module and the main control module. The first vehicle detection module and the second vehicle detection module are respectively arranged at the ramp entrance and the barrier machine, ensuring that the position and status of the vehicle are known in real time, thereby improving the accuracy and timeliness of monitoring. The main control module receives and processes the detection signal, and intelligently controls the operation of the license plate recognition module, effectively saving resources. At the same time, the built-in timing unit and communication module of the main control module can quickly send alarm information to the terminal when an abnormality is detected (such as a vehicle that has not passed the barrier machine for a long time), so as to facilitate the staff to respond in time and ensure that the road is unobstructed. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the technical solutions in the embodiments of the present disclosure, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present disclosure. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0028] Figure 1 is a structural schematic diagram of a lane monitoring device provided by an embodiment of the present disclosure;

[0029] Figure 2 is a circuit diagram of a first vehicle detection module provided by an embodiment of the present disclosure;

[0030] Figure 3 is a circuit diagram of a switch module provided in an embodiment of the present disclosure. DETAILED DESCRIPTION

[0031] In order to enable people in the technical field to better understand the present solution, the technical solution in the embodiment of the present solution will be clearly described below in conjunction with the drawings in the embodiment of the present solution. Obviously, the described embodiment is an embodiment of a part of the present solution, not all of the embodiments. Based on the embodiments in the present solution, all other embodiments obtained by ordinary technicians in the field without creative work should fall within the scope of protection of the present solution.

[0032] The term "including" and any other variations in the specification and claims of this solution and the above drawings mean "including but not limited to", and is intended to cover non-exclusive inclusions and is not limited to the examples listed in the text. In addition, the terms "first" and "second" are used to distinguish different objects, not to describe a specific order.

[0033] The following is a detailed description of the implementation of the present disclosure in conjunction with the specific drawings:

[0034] Figure 1 A schematic diagram of the structure of a lane monitoring device provided by an embodiment of the present disclosure. Figure 1 , a lane monitoring device comprises a main control module, a first vehicle detection module, a second vehicle detection module, a switch module and a license plate recognition module; the first vehicle detection module is arranged at the ramp entrance, and the second vehicle detection module is arranged at the barrier machine position; the first vehicle detection module and the second vehicle detection module are both connected to the main control module, and the first vehicle detection module and the second vehicle detection module are both used to detect vehicles; the control end of the switch module is connected to the main control module, the first end of the switch module is used to connect to the power supply, the second end of the switch module is connected to the license plate recognition module, and the license plate recognition module is connected to the main control module; the main control module is connected to the terminal communication through the communication module.

[0035] In this embodiment, the first vehicle detection module is arranged at the entrance of the ramp. When a vehicle enters the ramp, the first vehicle detection module can detect the presence of the vehicle and transmit the detection signal to the main control module. This helps to sense the arrival of the vehicle in advance and prepare for subsequent monitoring and processing. The second vehicle detection module is located at the barrier machine position and is used to detect whether the vehicle has arrived at the barrier machine. Its detection result is also transmitted to the main control module to determine the specific location and status of the vehicle. The first vehicle detection module and the second vehicle detection module can be implemented by induction coil and camera technology. The main control module is used to receive and process the detection signals from the first vehicle detection module and the second vehicle detection module.

[0036] The switch module is controlled by the main control module and is used to control the power supply of the license plate recognition module. When the main control module determines that the license plate needs to be recognized based on the data of the vehicle detection module (for example, when a vehicle passes through the barrier machine), the switch module will send a signal to the switch module to close the switch module, thereby providing power to the license plate recognition module. In this way, the license plate recognition module can start working and recognize the license plate of the passing vehicle.

[0037] The license plate recognition module can automatically capture and identify the license plate number when a vehicle passes by. The license plate recognition module can be realized through high-definition cameras and image processing technology. The recognized license plate information will be sent to the main control module, which can then be used for various purposes such as vehicle management, charging, violation records, etc.

[0038] In this embodiment, a timing unit is provided inside the main control module. When the first vehicle detection module detects a vehicle, timing starts. If the second vehicle detection module does not detect the vehicle within the set time, it indicates that the vehicle on the ramp or the second vehicle detection module has a fault. At this time, the main control module can send the signal to the terminal through the communication unit to notify relevant staff to check the situation on site in time to ensure normal traffic on the road.

[0039] For example: the lane monitoring device mentioned above is installed in a toll booth lane of a certain highway.

[0040] At the entrance of the ramp, a first vehicle detection module based on the principle of electromagnetic induction is installed. When a car enters the ramp, the first vehicle detection module quickly detects the vehicle and transmits the detection signal to the main control module in the form of an electrical signal. After receiving the signal, the main control module begins to prepare for the subsequent monitoring process. When the car drives to the barrier machine position, the second vehicle detection module installed here detects that the vehicle has arrived and transmits the detection result to the main control module. The main control module receives this information and determines that the vehicle's license plate needs to be identified. At this time, the main control module sends a control signal to the switch module, the switch module is closed, and the power supply supplies power to the license plate recognition module. The license plate recognition module uses a high-definition camera and advanced image processing technology to quickly capture the vehicle's license plate image and identify it. The identified license plate number is sent to the main control module. The main control module compares the license plate information with the vehicle information in the database, confirms that the vehicle has no arrears and violation records, and then controls the barrier machine to rise and allow the vehicle to pass. At the same time, the information of the vehicle passing this time, including the license plate number, passing time, etc., is recorded in the system for subsequent statistics and management.

[0041] It can be concluded from the above that this embodiment realizes efficient monitoring and management of vehicles in the lane through the first vehicle detection module, the second vehicle detection module, the switch module, the license plate recognition module and the main control module. The first vehicle detection module and the second vehicle detection module are respectively arranged at the ramp entrance and the barrier machine to ensure that the vehicle position and status are known in real time, thereby improving the accuracy and timeliness of monitoring. The main control module receives and processes the detection signal, intelligently controls the operation of the license plate recognition module, and effectively saves resources. At the same time, the built-in timing unit and communication module of the main control module can quickly send alarm information to the terminal when an abnormality is detected (such as a vehicle that has not passed the barrier machine for a long time), so as to facilitate the staff to respond in time and ensure that the road is unobstructed.

[0042] like Figure 2 As shown, in one embodiment of the present disclosure, the first vehicle detection module and the second vehicle detection module have the same structure, and the first vehicle detection module includes a pulse generating circuit, a vehicle detection circuit and a vehicle judgment circuit; the pulse generating circuit is connected to the input end of the vehicle detection circuit, the output end of the vehicle detection circuit is connected to the input end of the vehicle judgment circuit, and the output end of the vehicle judgment circuit is connected to the main control module.

[0043] In this embodiment, the first vehicle detection module and the second vehicle detection module have the same structure. The first vehicle detection module and the second vehicle detection module can accurately and reliably detect the presence of vehicles on the lane, and report the detection results to the main control module in a timely manner, providing an important basis for subsequent processing of lane monitoring. Taking the first vehicle detection module as an example, the first vehicle detection module is composed of a pulse generating circuit, a vehicle detection circuit and a vehicle judgment circuit.

[0044] The pulse generating circuit is responsible for generating periodic electrical signals (pulses), which are used as the excitation source of the vehicle detection circuit. The pulse generating circuit can be implemented by a timer, an oscillator or other electronic components to ensure the generation of stable and controllable pulse signals. The vehicle detection circuit receives the pulse signals from the pulse generating circuit and uses these signals to detect the presence of the vehicle. The vehicle detection circuit may include a circuit connected to an induction coil. When a vehicle passes through the induction coil, the inductance or mutual inductance of the coil is changed, thereby changing the current or voltage in the circuit. This change is detected and converted into a signal of the presence of the vehicle. The vehicle judgment circuit receives the signal from the vehicle detection circuit and determines whether a vehicle actually passes according to a preset threshold or logic judgment rule. The output end of the vehicle judgment circuit is connected to the main control module and sends the judgment result to the main control module.

[0045] like Figure 2 As shown, in one embodiment of the present disclosure, the pulse generating circuit includes a controller U1, a resistor R1, a variable resistor RP1 and a capacitor C3; the first end of the resistor R1 is connected to the VCC power supply, the second end of the resistor R1 is connected to the discharge end of the controller U1, the second end of the resistor R1 is connected to the first end of the variable resistor RP1, the second end of the variable resistor RP1 is grounded through the capacitor C3, the sliding end of the variable resistor RP1 is connected to the first trigger end of the controller U1, the second trigger end of the controller U1 is connected to the first trigger end of the controller U1, the power supply end of the controller U1 is connected to the VCC power supply, and the output end of the controller U1 is connected to the input end of the vehicle detection circuit.

[0046] In this embodiment, the controller U1 can use a 555 timer. The controller U1, resistor R1, variable resistor RP1 and capacitor C3 constitute an oscillator. The output end of the controller U1 is used to output a pulse signal, which can be used as an excitation source for the vehicle detection circuit.

[0047] In one embodiment of the present disclosure, the pulse generating circuit also includes a transistor Q1 and a transistor Q2; the base of the transistor Q1 is connected to the output end of the controller U1, the base of the transistor Q1 is connected to the base of the transistor Q2, the collector of the transistor Q1 is connected to the VDD power supply, the emitter of the transistor Q1 is connected to the emitter of the transistor Q2, the collector of the transistor Q2 is grounded, and the emitter of the transistor Q2 is connected to the input end of the vehicle detection circuit.

[0048] In this embodiment, the driving capability of the pulse signal output by the controller U1 is weak, resulting in the inability of the vehicle detection circuit to effectively identify the passing vehicle. For this reason, this embodiment adds transistors Q1 and Q2, and the transistors Q1 and Q2 form a push-pull circuit for improving the driving capability of the pulse signal.

[0049] When the controller U1 outputs a low level, transistor Q1 is turned off and transistor Q2 is turned on. At this time, the emitter of transistor Q2 is a low level; when the controller U1 outputs a high level, transistor Q1 is turned on and transistor Q2 is turned off. At this time, the emitter of transistor Q2 is the VDD power supply.

[0050] like Figure 2 As shown, in one embodiment of the present disclosure, the vehicle detection circuit includes a detection coil L1, a resistor R4, an operational amplifier U2, a resistor R6 and a resistor R5; the first end of the detection coil L1 serves as the input end of the vehicle detection circuit, the second end of the detection coil L1 is grounded, the first end of the detection coil L1 is connected to the non-inverting input end of the operational amplifier U2 through the resistor R4, the inverting input end of the operational amplifier U2 is grounded through the resistor R6, the output end of the operational amplifier U2 is connected to the inverting input end of the operational amplifier U2 through the resistor R5, and the output end of the operational amplifier U2 is connected to the input end of the vehicle judgment circuit.

[0051] In this embodiment, the detection coil L1 is buried under the ground of the ramp, and the detection coil L1 generates a magnetic field under the action of the pulse excitation source. When a metal object (such as a vehicle) approaches, the distribution of this magnetic field will change, thereby generating an induced current (also called eddy current) in the detection coil L1. This induced current will further affect the impedance of the detection coil L1, and then be detected by the circuit. When there is no vehicle, the magnetic field in which the detection coil L1 is located is relatively stable, and the induced electrical signal is weak. The electrical signal induced by the detection coil L1 is input to the in-phase input terminal of the operational amplifier U2 through the resistor R4. The operational amplifier U2 and its resistors R5 and R6 constitute a in-phase proportional amplifier circuit. Since the inverting input terminal of the operational amplifier U2 is grounded through the resistor R6 and connected to the output terminal of the operational amplifier U2 through the resistor R5, negative feedback is formed. When there is no vehicle, the operational amplifier U2 outputs a relatively stable low-level signal. When a vehicle passes by, the electrical signal induced by the detection coil L1 changes, and after being amplified by the operational amplifier U2, an electrical signal with a large change is output to the input terminal of the vehicle judgment circuit.

[0052] For example, if the voltage change induced by the detection coil L1 is small, after being amplified by the operational amplifier U2, this change can be recognized and processed by the subsequent vehicle judgment circuit.

[0053] In this embodiment, the vehicle detection circuit realizes efficient and stable detection of metal objects (such as vehicles) by combining an inductive sensor (detection coil L1) with a high-precision operational amplifier (op amp U2). This design not only improves the sensitivity and accuracy of detection, but also enhances the stability and anti-interference ability of the signal through a negative feedback circuit, providing a reliable data basis for subsequent vehicle identification and judgment, thereby improving the performance and efficiency of the entire lane monitoring system.

[0054] like Figure 2As shown, in one embodiment of the present disclosure, the vehicle judgment circuit includes an operational amplifier U3, a NOT gate U4, a NOT gate U5 and a trigger U6; the non-inverting input terminal of the operational amplifier U3 is connected to the output terminal of the vehicle detection circuit, the inverting input terminal of the operational amplifier U3 is connected to the Vr reference voltage, the output terminal of the operational amplifier U3 is connected to the input terminal of the NOT gate U4, the output terminal of the NOT gate U4 is connected to the input terminal of the NOT gate U5, the output terminal of the NOT gate U5 is connected to the input terminal of the trigger U6, the clock terminal of the trigger U6 is connected to the output terminal of the operational amplifier U3, and the output terminal of the trigger U6 is connected to the main control module.

[0055] In this embodiment, the operational amplifier U3 constitutes a comparator, and the non-inverting input terminal of the operational amplifier U3 receives the output signal from the vehicle detection circuit. The operational amplifier U3 compares the input signal with the Vr reference voltage connected to the inverting input terminal. When the signal voltage output by the vehicle detection circuit is higher than the Vr reference voltage, the operational amplifier U3 outputs a high level; otherwise, the operational amplifier U3 outputs a low level. The output terminal of the operational amplifier U3 is connected to the input terminal of the NOT gate U4, and the function of the NOT gate is to invert the level of the input signal. That is, when the operational amplifier U3 outputs a high level, the NOT gate U4 outputs a low level; when the operational amplifier U3 outputs a low level, the NOT gate U4 outputs a high level. The output terminal of the NOT gate U4 is connected to the input terminal of the NOT gate U5, and is inverted again through the NOT gate U5.

[0056] The NOT gates U4 and U5 are connected in sequence to form two-stage inversion, which can enhance the stability of the signal. The output end of the NOT gate U5 is connected to the input end of the trigger U6. In this embodiment, the trigger U6 can be a D trigger.

[0057] The clock end of trigger U6 is also connected to the output end of op amp U3. When the output level of op amp U3 changes (that is, a change in the vehicle signal is detected), this change is first transmitted to the clock end of trigger U6 as a trigger signal, and then the output level of op amp U3 is added to the input end of trigger U6 after two inversions. Trigger U6 can play a role in signal delay. The clock end of trigger U6 (D trigger) is only valid when it is at a high level. Two inversions can ensure that trigger U6 receives the clock signal first. Trigger U6 generates a corresponding output signal at its output end according to the input trigger signal and clock signal, and sends the signal to the main control module.

[0058] For example, when a vehicle passes by, the op amp U2 outputs a voltage signal, and the voltage signal is greater than the Vr reference voltage, the op amp U3 outputs a high level, and the high level is sent to the clock end of the trigger U6. The high level output by the op amp U3 is sent to the input end of the trigger U6 after being inverted twice. At this time, the trigger U6 also outputs a high level, which is sent to the main control module. If the vehicle stops on the detection coil L1 and does not move, the main control module will continue to receive high-level signals.

[0059] In this embodiment, the performance of vehicle detection is enhanced by using an op amp comparator, two-stage NOT gate logic inversion and a D flip-flop. By accurately comparing the vehicle detection signal with the reference voltage, using the two-stage NOT gate to stabilize the signal, and coordinating the clock control of the D flip-flop to achieve signal delay output, the circuit effectively filters out noise interference and ensures that a clear signal is sent to the main control module only when a real vehicle is detected, thereby greatly improving the accuracy of vehicle detection and the overall reliability of the system.

[0060] like Figure 3 As shown, in one embodiment of the present disclosure, the switch module includes a switch tube Q4, a resistor R8, a capacitor C6 and a transistor Q3; the control end of the switch tube Q4 is connected to the main control module, the first end of the switch tube Q4 is connected to the VCC power supply, the second end of the switch tube Q4 is connected to the first end of the capacitor C6 through the resistor R8, the second end of the capacitor C6 is grounded, the first end of the capacitor C6 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to the VCC power supply, and the emitter of the transistor Q3 is connected to the license plate recognition module.

[0061] In this embodiment, when the second vehicle detection module detects a vehicle, the main control module outputs a high-level signal, the switch tube Q4 is turned on, the resistor R8 and the capacitor C6 form a buffer circuit, the switch tube Q4 is turned on, the voltage on the capacitor C6 is 0, the transistor Q3 is turned off, and then the capacitor C5 starts to charge, the voltage on the capacitor C6 starts to increase, and when the voltage on the capacitor C6 is greater than the conduction voltage of the transistor Q3, the transistor Q3 is turned on, and as the voltage on the capacitor C6 increases, the base current of the transistor Q3 increases, so that the current added to the license plate recognition module increases, so that the license plate recognition module slowly enters the working state, avoiding the instantaneous large current at the moment of the switch module closing to damage the license plate recognition module. Thereby, the service life of the license plate recognition module is improved.

[0062] In this embodiment, the switch module effectively protects the license plate recognition module from transient large current impact through a fine control mechanism. The module uses the on and off of the switch tube Q4, in conjunction with the buffer circuit composed of the resistor R8 and the capacitor C6, to achieve a smooth transition of the current. This ensures that the license plate recognition module can slowly and smoothly enter the working state, effectively avoiding the damage that may be caused by the instantaneous large current of the switch, thereby extending the service life of the license plate recognition module.

[0063] like Figure 3 As shown, in one embodiment of the present disclosure, the switch module also includes a switch tube Q5; the control end of the switch tube Q5 is connected to the control end of the switch tube Q4, the first end of the switch tube Q5 is connected to the first end of the capacitor C6, and the second end of the switch tube Q5 is grounded.

[0064] In this embodiment, the switch tube Q5 constitutes a discharge module. When the license plate recognition module is not working, the switch tube Q4 is turned off. In order to ensure that the license plate recognition module is not damaged when the switch module is closed next time, the electric energy stored in the capacitor C6 in advance needs to be released. In this embodiment, the switch tube Q5 is a P-channel enhancement field effect transistor. When the license plate recognition module is not working, the control end of the switch tube Q4 is at a low level, the switch tube Q3 is turned on, and the capacitor C6 releases the electric energy through the switch tube Q5.

[0065] The above embodiments are only used to illustrate the technical solutions of the present disclosure, rather than to limit them. Although the present disclosure has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present disclosure.

Claims

1. A lane monitoring device, characterized in that: include: A main control module, a first vehicle detection module, a second vehicle detection module, a switch module, a license plate recognition module and a communication module; The first vehicle detection module is arranged at the ramp entrance, and the second vehicle detection module is arranged at the barrier machine position; The first vehicle detection module and the second vehicle detection module are both connected to the main control module, and the first vehicle detection module and the second vehicle detection module are both used to detect vehicles; The control end of the switch module is connected to the main control module, the first end of the switch module is used to connect to the power supply, the second end of the switch module is connected to the license plate recognition module, and the license plate recognition module is connected to the main control module; The main control module is connected to the terminal through the communication module.

2. A lane monitoring device as claimed in claim 1, characterized in that: The first vehicle detection module and the second vehicle detection module have the same structure, and the first vehicle detection module includes a pulse generating circuit, a vehicle detection circuit and a vehicle determination circuit; The pulse generating circuit is connected to the input end of the vehicle detection circuit, the output end of the vehicle detection circuit is connected to the input end of the vehicle judgment circuit, and the output end of the vehicle judgment circuit is connected to the main control module.

3. A lane monitoring device as claimed in claim 2, characterized in that: The pulse generating circuit includes a controller U1, a resistor R1, a variable resistor RP1 and a capacitor C3; The first end of the resistor R1 is connected to the VCC power supply, the second end of the resistor R1 is connected to the discharge end of the controller U1, the second end of the resistor R1 is connected to the first end of the variable resistor RP1, the second end of the variable resistor RP1 is grounded through the capacitor C3, the sliding end of the variable resistor RP1 is connected to the first trigger end of the controller U1, the second trigger end of the controller U1 is connected to the first trigger end of the controller U1, the power supply end of the controller U1 is connected to the VCC power supply, and the output end of the controller U1 is connected to the input end of the vehicle detection circuit.

4. A lane monitoring device as claimed in claim 3, characterized in that: The pulse generating circuit also includes a transistor Q1 and a transistor Q2; The base of the transistor Q1 is connected to the output end of the controller U1, the base of the transistor Q1 is connected to the base of the transistor Q2, the collector of the transistor Q1 is connected to the VDD power supply, the emitter of the transistor Q1 is connected to the emitter of the transistor Q2, the collector of the transistor Q2 is grounded, and the emitter of the transistor Q2 is connected to the input end of the vehicle detection circuit.

5. A lane monitoring device as claimed in claim 2, characterized in that: The vehicle detection circuit includes a detection coil L1, a resistor R4, an operational amplifier U2, a resistor R6 and a resistor R5; The first end of the detection coil L1 serves as the input end of the vehicle detection circuit, the second end of the detection coil L1 is grounded, the first end of the detection coil L1 is connected to the non-inverting input end of the operational amplifier U2 through the resistor R4, the inverting input end of the operational amplifier U2 is grounded through the resistor R6, the output end of the operational amplifier U2 is connected to the inverting input end of the operational amplifier U2 through the resistor R5, and the output end of the operational amplifier U2 is connected to the input end of the vehicle judgment circuit.

6. A lane monitoring device as claimed in claim 2, characterized in that: The vehicle judgment circuit includes an operational amplifier U3, a NOT gate U4, a NOT gate U5 and a trigger U6; The non-inverting input terminal of the operational amplifier U3 is connected to the output terminal of the vehicle detection circuit, the inverting input terminal of the operational amplifier U3 is connected to the Vr reference voltage, the output terminal of the operational amplifier U3 is connected to the input terminal of the NOT gate U4, the output terminal of the NOT gate U4 is connected to the input terminal of the NOT gate U5, the output terminal of the NOT gate U5 is connected to the input terminal of the trigger U6, the clock terminal of the trigger U6 is connected to the output terminal of the operational amplifier U3, and the output terminal of the trigger U6 is connected to the main control module.

7. A lane monitoring device as claimed in claim 1, characterized in that: The switch module includes a switch tube Q4, a resistor R8, a capacitor C6 and a transistor Q3; The control end of the switch tube Q4 is connected to the main control module, the first end of the switch tube Q4 is connected to the VCC power supply, the second end of the switch tube Q4 is connected to the first end of the capacitor C6 through the resistor R8, the second end of the capacitor C6 is grounded, the first end of the capacitor C6 is connected to the base of the transistor Q3, the collector of the transistor Q3 is connected to the VCC power supply, and the emitter of the transistor Q3 is connected to the license plate recognition module.

8. A lane monitoring device as claimed in claim 7, characterized in that: The switch module also includes a switch tube Q5; The control end of the switch tube Q5 is connected to the control end of the switch tube Q4, the first end of the switch tube Q5 is connected to the first end of the capacitor C6, and the second end of the switch tube Q5 is grounded.

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