A vehicle driving height limit auxiliary detection circuit

Abstract

The utility model relates to height limit detection technical field discloses a kind of vehicle driving height limit auxiliary detection circuit that can actively detect and timely early warning, including infrared height measuring module (210,220) for emitting infrared and receiving infrared signal of infrared reflection, main control module (310) and warning execution module (320), wherein, when main control module (310) receives carrier signal, the height of vehicle is lower than height limit height, main control module (310) is according to current state output low-level control signal, warning execution module (320) has no output;When main control module (310) does not receive carrier signal, the height of vehicle is higher than height limit height, main control module (310) is according to current state output high-level control signal, warning execution module (320) is controlled to issue warning signal.

Description

Technical Field

[0001] This utility model relates to the field of height limit detection technology, and more specifically, to a vehicle driving height limit auxiliary detection circuit. Background Technology

[0002] With the rapid development of urban transportation networks, height-restricted structures such as underpasses, tunnels, interchanges, and pedestrian bridges are becoming increasingly common. To ensure the safety of these structures, height restriction protection facilities are usually installed at the entrances to prevent vehicles exceeding the prescribed height from entering and to prevent collisions.

[0003] However, the height restriction facilities currently in widespread use still have the following significant drawbacks:

[0004] The fixed steel structure height restriction frame is not adjustable. If the driver does not pay attention to the height markings or makes a misjudgment, he may collide directly with the height restriction frame, which may cause damage to the vehicle, damage to the cargo, or even personal injury.

[0005] While adjustable height limiters offer height adjustment capabilities, they lack the ability to detect and warn of approaching vehicles in real time. Furthermore, the adjustment process requires manual or electric operation, resulting in delayed responses and an inability to provide real-time feedback for individual vehicles. Consequently, the risk of collisions due to driver negligence remains. Utility Model Content

[0006] The technical problem to be solved by this utility model is to provide a vehicle driving height limit auxiliary detection circuit that can actively detect and provide timely warnings, addressing the shortcomings of existing technologies that use fixed steel structure height limit frames or adjustable height limit frames.

[0007] The technical solution adopted by this utility model to solve its technical problem is: to construct a vehicle driving height limit auxiliary detection circuit, including:

[0008] An infrared altimeter module, configured inside a vehicle, is used to emit infrared rays and receive infrared signals reflected from the infrared rays, and to amplify and decode the infrared signals to output at least one carrier signal.

[0009] The main control module, whose signal input terminal is connected to the output terminal of the infrared altimeter module, is used to receive and process the carrier signal, and output at least one control signal according to the processed carrier signal.

[0010] The warning execution module has its signal input terminal connected to the output terminal of the main control module.

[0011] When the main control module receives the carrier signal, if the vehicle's height is below the height limit, the main control module outputs a low-level control signal based on the current state, and the warning execution module has no output.

[0012] When the main control module does not receive the carrier signal, and the vehicle's height is higher than the height limit, the main control module outputs a high-level control signal according to the current state, and the warning execution module is controlled to issue a warning signal.

[0013] In some embodiments, the infrared altimeter module includes at least a transmitting module and a receiving module.

[0014] The transmitting module is used to emit the infrared rays;

[0015] The receiving module is used to receive the infrared signal reflected by the infrared rays from the transmitting module;

[0016] The output terminal of the receiving module is coupled to the signal input terminal of the main control module.

[0017] In some embodiments, an amplification module is also included, with one input terminal of the amplification module connected to the output terminal of the receiving module.

[0018] The output terminal of the amplification module is connected to the signal input terminal of the main control module.

[0019] In some embodiments, a decoding module is also included. The input of the decoding module is connected to the output of the amplification module. The decoding module receives the amplified infrared signal from the amplification module and processes the infrared signal to obtain the carrier signal.

[0020] The output terminal of the decoding module is connected to the signal input terminal of the main control module, and is used to receive the carrier signal and output the control signal in response to the carrier signal.

[0021] In some embodiments, the transmitting module includes a transmitting tube and a transistor.

[0022] The anode of the transmitting tube is connected to the power supply terminal.

[0023] The cathode of the transmitting tube is connected to the collector of the transistor.

[0024] The base of the transistor is coupled to a signal terminal of the decoding module.

[0025] The emitter of the transistor is connected to the common terminal.

[0026] In some embodiments, the receiving module includes at least a receiving tube.

[0027] The input terminal of the receiving tube is used to receive the infrared signal.

[0028] The output terminal of the receiving tube is connected to the signal input terminal of the amplification module.

[0029] In some embodiments, the amplification module includes an operational amplifier.

[0030] The inverting input of the operational amplifier is connected to the output of the receiving tube.

[0031] The non-inverting input of the operational amplifier is connected to its output.

[0032] The output of the operational amplifier is coupled to the input of the decoding module.

[0033] In some embodiments, the decoding module includes at least a decoder, the input of which is connected to the output of the operational amplifier, for receiving the infrared signal input from the operational amplifier, processing the input infrared signal, and outputting at least one carrier signal;

[0034] One signal terminal of the decoder is connected to the base of the transistor and is used to input an oscillation signal to the transistor.

[0035] In some embodiments, a power supply module is also included, the output of which is connected to the power input of the infrared height measurement module and the power input of the main control module, respectively, to provide operating power to the infrared height measurement module and the main control module.

[0036] The vehicle height restriction auxiliary detection circuit described in this utility model includes an infrared height measurement module for emitting infrared rays and receiving infrared signals reflected from the infrared rays, a main control module, and a warning execution module. When the main control module receives a carrier signal, the vehicle's height is below the height restriction limit. The main control module outputs a low-level control signal based on the current state, and the warning execution module has no output. When the main control module does not receive a carrier signal, the vehicle's height is above the height restriction limit. The main control module outputs a high-level control signal based on the current state, and the warning execution module is controlled to issue a warning signal. Compared with existing technologies, by using the infrared beam transmission principle of the infrared height measurement module, the vehicle's roof height can be detected in real-time and non-contactly before the vehicle enters the height restriction area. When the vehicle is detected to be too tall, the circuit system can trigger an audible and visual alarm before the vehicle reaches the collision point, providing the driver with a valuable 3-5 seconds of reaction time to brake or change lanes, completely avoiding collisions and preventing vehicle damage, bridge damage, cargo loss, and personal injury caused by collisions. Attached Figure Description

[0037] The present invention will be further described below with reference to the accompanying drawings and embodiments. In the accompanying drawings:

[0038] Figure 1 This is a circuit schematic diagram of an embodiment of the power module provided by this utility model;

[0039] Figure 2 This is a circuit diagram of an embodiment of the detection and processing module provided by this utility model;

[0040] Figure 3 This is a circuit diagram of an embodiment of the main control alarm module provided by this utility model. Detailed Implementation

[0041] To provide a clearer understanding of the technical features, objectives, and effects of this utility model, the specific embodiments of this utility model will now be described in detail with reference to the accompanying drawings.

[0042] like Figures 1-3 As shown, in the first embodiment of the vehicle height limit auxiliary detection circuit of this utility model, the vehicle height limit auxiliary detection circuit includes a power supply module 100, a detection and processing module 200, and a main control alarm module 300.

[0043] The power supply module 100 is used to receive a DC12V voltage signal, and then step down / regulate the input DC12V voltage signal to output a 3.3V voltage signal to provide working voltage for the detection and processing module 200 and the main control alarm module 300.

[0044] The detection and processing module 200 is used to emit infrared rays, receive reflected infrared signals, amplify and decode the infrared signals, and output at least one carrier signal accordingly.

[0045] The detection and processing module 200 includes an infrared height measurement module (210, 220), an amplification module 230, and a decoding module 240.

[0046] The infrared altimeter module (210, 220) is used to emit infrared rays and receive reflected infrared signals;

[0047] The amplification module 230 has an amplification function and is used to amplify the infrared signal input from the infrared height measurement modules (210, 220);

[0048] The core function of the decoding module 240 is to act as a "frequency filter", which is sensitive to a preset specific frequency. By setting the center frequency and bandwidth, it can decode or oscillate the input infrared signal and output at least one carrier signal.

[0049] The main control alarm module 300 has the functions of logic operation, signal reception, analysis, and outputting control signals and alarm signals according to the carrier signal input by the decoding module 240.

[0050] The main control alarm module 300 includes a main control module 310 and an alarm execution module 320.

[0051] The main control module 310 has the functions of logic operation, signal reception, analysis and output control signals;

[0052] The warning execution module 320 is used to output an audible alarm or a flashing light alarm.

[0053] Specifically, the infrared height measurement modules (210, 220) are configured inside the vehicle to emit infrared rays and receive infrared signals reflected from the infrared rays, and to amplify and decode the received infrared signals and output at least one carrier signal accordingly.

[0054] The signal input terminal of the main control module 310 is connected to the output terminal of the infrared height measurement module (210, 220) to receive and process the carrier signal, and output at least one control signal according to the processed carrier signal.

[0055] Furthermore, the signal input terminal of the warning execution module 320 is connected to the output terminal of the main control module 310, and is used to receive the control signal output by the main control module 310;

[0056] Specifically, when the main control module 310 receives a carrier signal, it indicates that the vehicle's height is below the height limit. The main control module 310 can output a low-level control signal according to the current state, and the warning execution module 320 will have no output.

[0057] When the main control module 310 does not receive a carrier signal, it indicates that the vehicle's height is higher than the height limit. The main control module 310 outputs a high-level control signal based on the current state, and the warning execution module 320 is controlled to issue a warning signal, thereby reminding the driver that the current driving state may lead to a dangerous situation.

[0058] Using this technical solution, the infrared height measurement module emits infrared beams to detect the vehicle's roof height in real time and non-contactly before the vehicle enters the height-restricted area. When the vehicle is detected to be too tall, the circuit system can trigger an audible and visual alarm before the vehicle reaches the collision point, providing the driver with a valuable 3-5 seconds of reaction time to brake or change lanes in an emergency, thus completely avoiding a collision. This can prevent vehicle damage, bridge damage, cargo loss, and personal injury caused by a collision.

[0059] In some implementations, such as Figure 2 As shown, to ensure the reliability of transmitting and receiving reflected signals, a transmitting module 210 and a receiving module 220 can be set in the infrared altimeter modules (210, 220).

[0060] Specifically, the transmitting module 210 is used to emit infrared light;

[0061] The receiving module 220 is used to receive the infrared signal reflected by the infrared radiation from the transmitting module 210;

[0062] The output of the receiving module 220 is coupled to the signal input of the main control module 310, and the infrared signal is input to the main control module 310.

[0063] In some implementations, such as Figure 2 As shown, to ensure the reliability of the reflected signal processing, an amplification module 230 can be set in the detection and processing module 200, which has the function of signal amplification;

[0064] Specifically, one input terminal of the amplification module 230 is connected to the output terminal of the receiving module 220 to receive infrared signals, amplify the input infrared signals, and then output them to the subsequent circuit (such as the decoding module 240).

[0065] The output of the amplifier module 230 is connected to the signal input of the main control module 310.

[0066] In some implementations, such as Figure 2 As shown, to ensure the reliability of infrared signal processing, a decoding module 240 can be set in the detection and processing module 200, which has the functions of signal decoding and oscillation;

[0067] Specifically, the input terminal of the decoding module 240 is connected to the output terminal of the amplification module 230, and is used to receive the infrared signal amplified by the amplification module 230, process the infrared signal to obtain the carrier signal, and output the carrier signal to the main control module 310.

[0068] The output terminal of the decoding module 240 is connected to the signal input terminal of the main control module 310. The main control module 310 is used to receive the carrier signal input by the decoding module 240 and output at least one other control signal according to the carrier signal response.

[0069] In some implementations, such as Figure 2 As shown, the transmitting module 210 includes a transmitting diode IR1 and a transistor Q201, wherein the transmitting diode IR1 is used to emit infrared light.

[0070] Transistor Q201 is selected as an NPN type transistor, which has the function of a switch;

[0071] Specifically, the anode of the emitting diode IR1 is connected to the power supply terminal (corresponding to VCC) through the first resistor R201.

[0072] The cathode of the IR1 transmitter is connected to the collector of the Q201 transistor.

[0073] The base of transistor Q201 is connected to a signal terminal of decoding module 240 through the fifth resistor R205.

[0074] The emitter of transistor Q201 is connected to the common terminal. The operating state of transistor Q201 is controlled by the oscillation signal output by decoding module 240, which in turn controls the operating state of emitter IR1.

[0075] In some implementations, such as Figure 2 As shown, the receiving module 220 includes at least a receiving tube IR2.

[0076] Specifically, the cathode of the receiving tube IR2 is connected to the power supply terminal (corresponding to VCC) through a second resistor R202 and a third resistor R203 connected in series.

[0077] The input terminal of receiver IR2 is used to receive reflected infrared signals.

[0078] The output terminal of the receiving tube IR2 is connected to the signal input terminal of the amplifier module 230 through the fourth resistor R204.

[0079] In some implementations, such as Figure 2 As shown, the amplification module 230 includes an operational amplifier A201, which has the function of signal amplification;

[0080] Specifically, the inverting input (corresponding to pin 2) of operational amplifier A201 is connected to the output of receiver module 220 through a fourth resistor R204 and a third capacitor C201 connected in series, for receiving infrared signals and amplifying them.

[0081] The non-inverting input (corresponding to pin 3) of operational amplifier A201 is connected to its output through resistor R206.

[0082] Among them, the sixth resistor R206 is the positive feedback resistor;

[0083] The output terminal (corresponding to pin 1) of the operational amplifier A201 is connected to the input terminal of the decoding module 240 through the fourth capacitor C202. The amplified infrared signal is input to the decoding module 240 through the fourth capacitor C202.

[0084] In some implementations, such as Figure 2 As shown, the decoding module 240 includes at least a decoder U201, which has the function of decoding / oscillation;

[0085] Among them, pins 1 and 2 of decoder U201 are usually grounded through a capacitor to form an output filter network and a loop single-stage low-pass filter network.

[0086] The capacitor connected to pin 2 determines the capture bandwidth of the phase-locked loop: the larger the capacitance value, the narrower the loop bandwidth.

[0087] The capacitance of the capacitor connected to pin 1 should be at least twice that of the capacitor connected to pin 2;

[0088] Pin 3 is the signal input terminal, and the input signal is required to be ≥25mV;

[0089] Pin 8 is the logic output terminal, which contains an open-collector transistor with a maximum allowable sink current of 100mA.

[0090] Specifically, the input terminal (corresponding to pin 3) of the decoder U201 is connected to the output terminal (corresponding to pin 1) of the operational amplifier A201 to receive the infrared signal input to the operational amplifier A201, and to decode the input infrared signal to output at least one carrier signal;

[0091] The signal output terminal (corresponding to pin 8) of the decoder U201 is connected to the signal input terminal of the main control module 310 to input the carrier signal into the main control module 310;

[0092] One signal terminal (corresponding to pin 5) of decoder U201 is connected to the base of transistor Q201 to input an oscillation signal to transistor Q201 in order to control the state of transistor Q201;

[0093] Specifically, the decoder U201 outputs a 38kHz oscillation signal at pin 5. Its characteristic is that the infrared transmitting section does not have a dedicated signal generation circuit. The infrared signal received by the receiving tube IR2 is input at pin 4. This can prevent the difference in transmission and reception frequencies caused by changes in the surrounding environment and component parameters. It realizes the synchronous automatic tracking of the infrared transmission and reception operating frequencies, which greatly enhances the stability and anti-interference capability of the circuit.

[0094] In some implementations, such as Figure 3 As shown, the main control module 310 includes at least one main controller U301, which has the functions of logic operation, signal processing and control signal output;

[0095] Specifically, the signal input terminal (corresponding to pin 1) of the main controller U301 is connected to the signal output terminal (corresponding to pin 8) of the decoder U201 to receive carrier signals, analyze and process the input carrier signals, and adjust the level of the output control signal according to the processing results.

[0096] The signal output terminal (corresponding to pin 11) of the main controller U301 is connected to the signal input terminal of the alarm execution module 320.

[0097] When the main controller U301 receives a carrier signal, it indicates that the vehicle's height is below the height limit. The main controller U301 can output a low-level control signal according to the current status, and the buzzer BU1 of the warning execution module 320 will not output any sound.

[0098] When the main controller U301 does not receive a carrier signal, it indicates that the vehicle's height is higher than the height limit. The main controller U301 outputs a high-level control signal according to the current state, and the buzzer BU1 of the warning execution module 320 is controlled to issue a warning signal to remind the driver that the current driving state may be dangerous.

[0099] In some implementations, such as Figure 1 As shown, it also includes a power supply module 100. The output terminal of the power supply module 110 is connected to the power input terminal of the infrared height measurement module (210, 220) and the power input terminal of the main control module 310, respectively, to provide working power for the infrared height measurement module (210, 220) and the main control module 310.

[0100] The embodiments of the present invention have been described above with reference to the accompanying drawings. However, the present invention is not limited to the specific embodiments described above. The specific embodiments described above are merely illustrative and not restrictive. Those skilled in the art can make many other forms under the guidance of the present invention without departing from the spirit and scope of the claims. All of these forms are within the protection scope of the present invention.

Claims

1. A vehicle height limit auxiliary detection circuit, characterized in that, include: An infrared altimeter module, configured inside a vehicle, is used to emit infrared rays and receive infrared signals reflected from the infrared rays, and to amplify and decode the infrared signals to output at least one carrier signal. The main control module, whose signal input terminal is connected to the output terminal of the infrared altimeter module, is used to receive and process the carrier signal, and output at least one control signal according to the processed carrier signal. The warning execution module has its signal input terminal connected to the output terminal of the main control module. When the main control module receives the carrier signal, if the vehicle's height is below the height limit, the main control module outputs a low-level control signal based on the current state, and the warning execution module has no output. When the main control module does not receive the carrier signal, and the vehicle's height is higher than the height limit, the main control module outputs a high-level control signal according to the current state, and the warning execution module is controlled to issue a warning signal.

2. The vehicle driving height limit auxiliary detection circuit according to claim 1, characterized in that, The infrared altimeter module includes at least a transmitting module and a receiving module. The transmitting module is used to emit the infrared rays; The receiving module is used to receive the infrared signal reflected by the infrared rays from the transmitting module; The output terminal of the receiving module is coupled to the signal input terminal of the main control module.

3. The vehicle driving height limit auxiliary detection circuit according to claim 2, characterized in that, It also includes an amplification module, one input of which is connected to the output of the receiving module. The output terminal of the amplification module is connected to the signal input terminal of the main control module.

4. The vehicle driving height limit auxiliary detection circuit according to claim 3, characterized in that, It also includes a decoding module, the input of which is connected to the output of the amplification module. The decoding module receives the amplified infrared signal from the amplification module and processes the infrared signal to obtain the carrier signal. The output terminal of the decoding module is connected to the signal input terminal of the main control module, and is used to receive the carrier signal and output the control signal in response to the carrier signal.

5. The vehicle driving height limit auxiliary detection circuit according to claim 4, characterized in that, The transmitting module includes a transmitting tube and a transistor. The anode of the transmitting tube is connected to the power supply terminal. The cathode of the transmitting tube is connected to the collector of the transistor. The base of the transistor is coupled to a signal terminal of the decoding module. The emitter of the transistor is connected to the common terminal.

6. The vehicle driving height limit auxiliary detection circuit according to claim 5, characterized in that, The receiving module includes at least a receiving tube. The input terminal of the receiving tube is used to receive the infrared signal. The output terminal of the receiving tube is connected to the signal input terminal of the amplification module.

7. The vehicle driving height limit auxiliary detection circuit according to claim 6, characterized in that, The amplification module includes an operational amplifier. The inverting input of the operational amplifier is connected to the output of the receiving tube. The non-inverting input of the operational amplifier is connected to its output. The output of the operational amplifier is coupled to the input of the decoding module.

8. The vehicle driving height limit auxiliary detection circuit according to claim 7, characterized in that, The decoding module includes at least a decoder, the input of which is connected to the output of the operational amplifier, for receiving the infrared signal input from the operational amplifier, processing the input infrared signal, and outputting at least one carrier signal. One signal terminal of the decoder is connected to the base of the transistor and is used to input an oscillation signal to the transistor.

9. The vehicle driving height limit auxiliary detection circuit according to claim 8, characterized in that, It also includes a power module, the output of which is connected to the power input of the infrared height measurement module and the power input of the main control module, respectively, to provide working power for the infrared height measurement module and the main control module.

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