CN211019384U - Automatic control system for lighting equipment of engineering truck - Google Patents

Abstract

The utility model discloses an automatic control system for lighting equipment of an engineering vehicle, belonging to the technical field of automatic control, comprising a signal acquisition circuit, a control circuit, a regulating circuit and lighting equipment; The output is connected to a lighting device. The signal acquisition circuit collects the light intensity outside the vehicle and the signal of the turn signal switch, which is comprehensively judged by the control circuit, and outputs the control signal; the current is adjusted by the adjustment circuit, and finally the lighting equipment is controlled for lighting, and the construction vehicle works at the complex construction site at night. In the process of turning, the lighting device is automatically turned on, which has the function of reminding the driver to pay attention to the driving track of the wheels, and reminding the surrounding construction personnel and operation vehicles.

Description

An automatic control system for lighting equipment of an engineering vehicle

technical field

The utility model relates to the technical field of automatic control, in particular to an automatic control system for lighting equipment of an engineering vehicle.

Background technique

The construction site environment is complex, and there are many intersecting operations on the working face. Due to the poor visibility of night construction operations, it is easy to cause safety accidents. Especially in construction vehicles, which are larger in size, have more blind spots in driving vision, and often work in environments with poor lighting conditions such as construction sites or mountain roads. When the engineering vehicle needs to turn at night, it is very prone to safety accidents due to the existence of too many blind spots. The main reason for such an accident is that the vehicle has no auxiliary lighting measures, and the driver cannot see the sides and rear of the vehicle when reversing or turning.

Utility model content

The purpose of the utility model is to overcome the defects of the prior art, and to provide an automatic control system for lighting equipment of a construction vehicle with the functions of reminding the driver to pay attention to the running track of the wheels, and reminding the surrounding construction personnel and working vehicles.

In order to achieve the above purpose, the utility model adopts an automatic control system for lighting equipment of an engineering vehicle, which includes a signal acquisition circuit, a control circuit, an adjustment circuit and a lighting equipment; the output of the signal acquisition circuit is connected with the adjustment circuit through the control circuit, and the output of the adjustment circuit is connected. Connect with lighting equipment.

Further, the signal acquisition circuit includes a turn signal switch signal acquisition circuit and an exterior light intensity signal acquisition circuit.

Further, the turn signal switch signal acquisition circuit includes a turn signal switch SW and a photoelectric isolator U2, one end of the turn signal switch SW is connected to the anode of the light emitting diode in the photoelectric isolator U2 through a resistor R2, and the other end of the turn signal switch SW is sequentially The resistor R1 and the fuse FU1 are connected to the power supply voltage; the cathode of the light emitting diode in the photoelectric isolator U2 is grounded, and the collector of the triode in the photoelectric isolator U2 is connected to an input pin of the control circuit.

Further, the outside light intensity signal acquisition circuit includes a photoresistor LDR and an NPN triode Q1, one end of the photoresistor LDR is connected to the base of the NPN triode Q1 via a resistor R5, and the other end of the photoresistor LDR is connected to the NPN triode. The emitter of Q1 is connected, the collector of the NPN transistor Q1 is connected to one end of the photoresistor LDR through the resistor R3 and the resistor R4, and the collector of the NPN transistor Q1 is connected to an input pin of the control circuit, and one end of the resistor R6 It is connected to resistor R3, and the other end is connected to the collector of the triode in the opto-isolator U2.

Further, the control circuit is a single-chip microcomputer, the P1.0 pin of the single-chip microcomputer is connected with the collector of the NPN type triode Q1, the P1.1 pin of the single-chip microcomputer is connected with the collector of the transistor in the opto-isolator U2, and the P1. Pin 7 is connected to the input of the conditioning circuit.

Further, the adjustment circuit includes NPN type triode Q2, relay RL and sliding rheostat RV, the P1.7 pin output of the single-chip microcomputer is connected with the base of NPN type triode Q2 through resistor R7, and the emitter of NPN type triode Q2 is connected. Connected to the relay RL, the collector of the NPN transistor Q2 is connected to the other end of the turn signal switch SW, and the VCC output is sequentially connected to the lighting equipment through the fuse FU2, the resistor R2, the relay RL and the sliding rheostat RV.

Further, the lighting equipment is a rear view lamp, which is installed on both sides of the vehicle.

Compared with the prior art, the utility model has the following technical effects: the utility model first collects the light intensity outside the vehicle and the turn signal switch signal by the signal acquisition circuit, then outputs the high and low levels through the control circuit, and then adjusts the current size by the adjustment circuit. , the control signal is first amplified by the signal amplifying circuit, and then the current is automatically adjusted according to the size of the steering wheel angle. In this way, the driver can notice the position where the wheels are running, and at the same time, the surrounding construction personnel and work vehicles can notice the running state of the vehicle. The scheme has the advantages of simple operation, low cost, wide adaptability and strong reliability.

Description of drawings

Below in conjunction with the accompanying drawings, the specific embodiments of the present utility model are described in detail:

Fig. 1 is a structural schematic diagram of an automatic control system for lighting equipment of an engineering vehicle;

FIG. 2 is a schematic diagram of the circuit structure of an automatic control system for lighting equipment of an engineering vehicle.

Detailed ways

In order to further illustrate the features of the present invention, please refer to the following detailed description and accompanying drawings of the present invention. The attached drawings are for reference and description only, and are not intended to limit the protection scope of the present invention.

As shown in FIG. 1 , this embodiment discloses an automatic control system for lighting equipment of an engineering vehicle, including: a signal acquisition circuit, a control circuit, a regulating circuit and lighting equipment; the output of the signal acquisition circuit is connected to the regulating circuit through the control circuit, and the regulating circuit is The output of the circuit is connected to the lighting device. Wherein, the signal collection circuit includes a turn signal switch signal collection circuit and a vehicle exterior light intensity signal collection circuit, so as to collect and collect the turn signal switch signal and the exterior light intensity respectively.

Specifically, the function of the signal acquisition circuit is to use the sensor to collect the turn signal switch signal and the light intensity signal outside the vehicle and convert the signal; the function of the control circuit is to comprehensively process the collected sensor signal and output the control signal; the function of the adjustment circuit is to adjust The current intensity input to the execution module; the role of the lighting device is to provide lighting.

The specific working principle is: the signal acquisition circuit collects the light intensity outside the vehicle and the turn signal switch signal, and then comprehensively judges through the control circuit. If the light intensity is bright, it is judged that the lighting equipment does not need to be turned on; When the switch is turned on, it is determined that the lighting device needs to be turned on, and a control signal is output. The current is adjusted by the adjustment circuit. The control signal is first amplified by the signal amplification circuit, and then the current is automatically adjusted according to the steering wheel angle. The larger the angle, the greater the current output to the execution module, and finally the lighting equipment is controlled for lighting. Its function is to automatically turn on the lighting equipment when the construction vehicle turns at night during the operation of the more complex construction site, so as to remind the driver to pay attention to the driving track of the wheels, and remind the surrounding construction personnel and operation vehicles.

Specifically, as shown in Figure 2, the signal acquisition circuit of the turn signal switch includes a turn signal switch SW and an optoelectronic isolator U2. One end of the turn signal switch SW is connected to the anode of the light emitting diode in the opto-isolator U2 through a resistor R2. The other end of the switch SW is connected to the power supply voltage through the resistor R1 and the fuse FU1 in sequence; the cathode of the light-emitting diode in the photoelectric isolator U2 is grounded, and the collector of the triode in the photoelectric isolator U2 is connected to an input pin of the control circuit.

Its working principle is: the function of the photoelectric isolator U2 is to integrate the collected turn signal switch SW signal into a high and low level and input it to the P1.1 pin of the single-chip microcomputer U1. When the driver turns on the turn signal, the turn signal switch SW is closed. At this time, the light-emitting diode in the photoelectric isolator U2 is turned on, and the signal input to the P1.1 pin of the single-chip microcomputer U1 is a low-level signal at this time. When the driver turns on the turn signal, the turn signal switch SW is turned off. At this time, the light-emitting diode in the photoelectric isolator U2 is turned off, and the signal input to the P1.1 pin of the single-chip microcomputer U1 is a high potential signal at this time. Therefore, the state of the turn signal switch can be determined by detecting the input level of the P1.4 pin of the microcontroller U1.

Specifically, the external light intensity signal acquisition circuit includes a photoresistor LDR and an NPN transistor Q1. One end of the photoresistor LDR is connected to the base of the NPN transistor Q1 through a resistor R5, and the other end of the photoresistor LDR is connected to the NPN transistor Q1. The emitter of the NPN transistor Q1 is connected to one end of the photoresistor LDR through the resistor R3 and the resistor R4, and the collector of the NPN transistor Q1 is connected to an input pin of the control circuit, and one end of the resistor R6 is connected to The resistor R3 is connected, and the other end is connected to the collector of the triode in the opto-isolator U2.

Its working principle is: the night driving light is darker, and the resistance value of the photoresistor is large. At this time, the base voltage of the NPN transistor Q1 is a high-level signal, and the transistor is turned on, then the signal of the P1.0 pin of the single-chip microcomputer U1 is input. is a low-level signal. When driving in the daytime, the resistance value of the photoresistor is small. At this time, the base voltage of the NPN transistor Q1 is a low-level signal, and the transistor is off. At this time, the signal input to the P1.0 pin of the single-chip microcomputer U1 is a high-level signal. Therefore, detecting the input level of the P1.0 pin of the microcontroller U1 can determine the light intensity outside the vehicle.

Specifically, the control circuit is a single-chip microcomputer, the P1.0 pin of the single-chip microcomputer is connected to the collector of the NPN transistor Q1, the P1.1 pin of the single-chip microcomputer is connected to the collector of the transistor in the opto-isolator U2, and the P1. The .7 pin is connected to the input of the conditioning circuit.

The function of the single-chip microcomputer system is to comprehensively process the collected sensor signals and output control signals. It comprehensively judges whether the lighting device needs to be turned on according to the signals input by the P1.0 pin and the P1.1 pin. If it needs to be turned on, the P1.7 pin outputs a high-level signal; if not, the P1.7 pin outputs a low-level signal. Only when driving at night and the driver turns on the steering is it determined that the lighting device needs to be turned on. That is, when the P1.0 pin and the P1.4 pin input a low-level signal at the same time, the microcontroller U1 determines that the lighting device needs to be turned on, and at this time, the P1.7 pin outputs a high-level signal.

Specifically, the adjustment circuit includes an NPN transistor Q2, a relay RL and a sliding rheostat RV, the P1.7 pin output of the microcontroller is connected to the base of the NPN transistor Q2 through a resistor R7, and the NPN transistor Q2 emits The pole is connected to the relay RL, the collector of the NPN transistor Q2 is connected to the other end of the turn signal switch SW, and the VCC output is sequentially connected to the lighting equipment through the fuse FU2, the resistor R2, the relay RL and the sliding rheostat RV.

The function of the adjustment circuit is to adjust the current intensity input to the execution module. The relay RL is controlled by the NPN transistor Q2. When the P1.7 pin of the microcontroller U1 outputs a low level, the transistor Q1 is turned off, and the relay RL does not work; when the P1.7 pin of the car microcontroller U1 outputs a high level, the transistor U1 is turned on, making the relay RL work. The relay RL is the switch of the lighting equipment. When the relay is working, the current flows from the VCC through the fuse FU, the resistor R2, the relay RL and the sliding rheostat RV to the lighting equipment L, and the lighting equipment L lights up. When the relay does not work, no current flows through the lighting device L, and the lighting device L does not light up. The function of the sliding varistor RV is to adjust the current of the lighting device L. The sliding contact of the sliding varistor RV is connected with the steering wheel and moves with the rotation of the steering wheel. In the initial state, the sliding contact is located at the lowermost end of the sliding varistor RV. When the steering wheel is rotated, the sliding contact of the sliding varistor RV moves upward, and the larger the rotation angle is, the larger the current of the lighting device L is. When the steering wheel returns to the timing, the sliding contact of the sliding varistor RV rotates with it and is in the initial state again.

Specifically, the lighting equipment is a rear view lamp, which is installed on both sides of the vehicle. The rear-view light is specifically installed on the frame above the wheel, fixed with bolts, and is mainly used to illuminate the wheel. By using the rear view lamp to provide illumination, it helps the driver to observe whether there is a pedestrian or vehicle behind the vehicle, and also reminds the pedestrian or vehicle behind to pay attention to the driving state of the vehicle ahead

The following describes the overall working process of the automatic control system for the lighting equipment of the construction vehicle:

Initial state: The turn signal switch SW is in the off state, the light-emitting diode in the opto-isolator U2 is turned off, and the signal input to the P1.1 pin of the single-chip microcomputer U1 is a high-potential signal at this time. When the relay does not work, no current flows through the lighting device L, and the lighting device L does not light up. The sliding contact of U2 sliding varistor RV is at the lowermost end.

When driving in the daytime: when driving in the daytime, the resistance of the photoresistor is small. At this time, the base voltage of the NPN transistor Q1 is a low-level signal, and the transistor is turned off, then the signal input to the P1.0 pin of the single-chip microcomputer U1 is a high potential at this time. Signal. The single-chip U1 comprehensively judges whether the lighting device needs to be turned on.

When driving at night: the light intensity is dark at night, and the resistance value of the photoresistor is large. At this time, the base voltage of the NPN transistor Q1 is a high-level signal, and the transistor is turned on, then the signal input to the P1.0 pin of the microcontroller U1 is low. potential signal. When the driver turns on the turn signal, the turn signal switch SW is closed. At this time, the light-emitting diode in the photoelectric isolator U2 is turned on, and the signal input to the P1.1 pin of the single-chip microcomputer U1 is a low-level signal at this time. At this time, when the P1.0 pin and the P1.4 pin input a low-level signal at the same time, the microcontroller U1 determines that the lighting device needs to be turned on, and the P1.7 pin outputs a high-level signal. At this time, the transistor U1 is turned on, making the relay RL work, and the current flows from the VCC through the fuse FU, the resistor R2, the relay RL and the sliding varistor RV to the lighting device L, and the lighting device L is lit. When the steering wheel is rotated, the sliding contact of the sliding varistor RV moves upward, and the larger the rotation angle is, the larger the current of the lighting device L is. Through the lighting provided by the lighting device L, the driver can clearly observe the surrounding environment of the vehicle, and at the same time, it also reminds the surrounding construction personnel and operating vehicles to pay attention to the driving state of the vehicle.

It should be noted that this embodiment combines the hardware resources already equipped with the existing engineering vehicles, plus an additional lighting device, determines the driver's steering intention through the hardware circuit design, and automatically turns on the lighting device when the car turns at night, which can act as a reminder. The driver observes the role of the road behind the vehicle, and also reminds the surrounding construction personnel and operation vehicles to pay attention to the driving state of the vehicle.

The above are only preferred embodiments of the present invention, and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention shall be included in the present invention. within the scope of protection of the utility model.

Claims (7)

1. an engineering vehicle lighting equipment automatic control system, is characterized in that, comprises: signal acquisition circuit, control circuit, adjustment circuit and lighting equipment; The output of the signal acquisition circuit is connected with the adjustment circuit through the control circuit, and the output of the adjustment circuit and the lighting device connection. 2 . The automatic control system for lighting equipment of an engineering vehicle according to claim 1 , wherein the signal acquisition circuit comprises a turn signal switch signal acquisition circuit and an exterior light intensity signal acquisition circuit. 3 . 3. The automatic control system for engineering vehicle lighting equipment as claimed in claim 2, wherein the turn signal switch signal acquisition circuit comprises a turn signal switch SW and a photoelectric isolator U2, and one end of the turn signal switch SW is isolated from the photoelectricity via a resistor R2 The anode of the light-emitting diode in the photoelectric isolator U2 is connected, and the other end of the turn signal switch SW is connected to the power supply voltage through the resistor R1 and the fuse FU1 in turn; the cathode of the light-emitting diode in the photoelectric isolator U2 is grounded, and the collector of the triode in the photoelectric isolator U2 is connected. an input pin of the control circuit. 4. The automatic control system for lighting equipment of an engineering vehicle as claimed in claim 3, wherein the signal acquisition circuit of the light intensity outside the vehicle comprises a photoresistor LDR and an NPN type triode Q1, and one end of the photoresistor LDR is connected to the NPN via a resistor R5. The base of the type triode Q1 is connected, the other end of the photoresistor LDR is connected to the emitter of the NPN triode Q1, the collector of the NPN triode Q1 is connected to one end of the photoresistor LDR through the resistor R3 and the resistor R4, and the NPN triode Q1 The collector of the resistor R6 is connected to an input pin of the control circuit, one end of the resistor R6 is connected to the resistor R3, and the other end is connected to the collector of the transistor in the optoelectronic isolator U2. 5. The engineering vehicle lighting equipment automatic control system as claimed in claim 4, wherein the control circuit is a single-chip microcomputer, and the P1.0 pin of the single-chip microcomputer is connected with the collector of the NPN type triode Q1, and the P1.1 The pin is connected with the collector of the triode in the photoelectric isolator U2, and the P1.7 pin of the single-chip microcomputer is connected with the input of the regulating circuit. 6. The construction vehicle lighting equipment automatic control system as claimed in claim 5, is characterized in that, described regulation circuit comprises NPN type triode Q2, relay RL and sliding varistor RV, and the P1.7 pin output of described single-chip microcomputer is through resistance R7 is connected to the base of the NPN transistor Q2, the emitter of the NPN transistor Q2 is connected to the relay RL, the collector of the NPN transistor Q2 is connected to the other end of the turn signal switch SW, and the VCC output goes through the fuse FU2, resistor R2, Relay RL and sliding rheostat RV are connected to the lighting device. 7. The automatic control system for lighting equipment of an engineering vehicle according to any one of claims 1-6, wherein the lighting equipment is a rear-view lamp, which is installed on both sides of the vehicle.

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