A traffic signal light detection device

Abstract

This invention relates to a traffic signal light detection device, belonging to the field of traffic signal light control technology. It includes a control circuit, a detection circuit, and a light control circuit. The control circuit is connected to both the detection circuit and the light control circuit. The light control circuit controls the traffic signal light to turn on or off according to the control signal from the control circuit and outputs a light signal to the detection circuit. The detection circuit detects the traffic signal light, the light control circuit, and itself according to the light signal and the detection signal from the control circuit, and transmits the detection results to the control circuit for judgment. This invention has the effect of real-time detection of whether the traffic signal light, the light control circuit, and the detection circuit are working properly, ensuring normal traffic signal indication and improving traffic safety.

Description

Technical Field

[0001] This invention relates to the field of traffic signal control technology, and in particular to a traffic signal detection device. Background Technology

[0002] Traffic lights are an indispensable part of life. As essential guides for travel, they illuminate and turn on according to traffic control signals, directing the movement of various vehicles on the road. Under normal circumstances, traffic lights can follow the traffic control signals. However, traffic lights are, after all, physical objects, and problems are bound to occur. For example, when a traffic light malfunctions, the traffic control signals may still be output normally, but the traffic light may not illuminate and turn on accordingly. If problems with traffic lights are not detected in time, it can cause traffic congestion.

[0003] Therefore, how to detect the status of traffic lights is an urgent problem to be solved. Summary of the Invention

[0004] The purpose of this invention is to provide a traffic signal light detection device for detecting traffic signals and light control circuits, while also detecting whether its own working status is normal. Based on the different states of the control signal and the light control signal, the device detects whether the status of the light, the light control circuit, and the detection circuit is normal.

[0005] The above-mentioned objective of this invention is achieved through the following technical solution:

[0006] A traffic signal light detection device includes a control circuit, a detection circuit, and a light control circuit. The control circuit is connected to both the detection circuit and the light control circuit. The light control circuit controls the traffic signal light to open or close according to the control signal from the control circuit and outputs a light signal to the detection circuit. The detection circuit detects the traffic signal light, the light control circuit, and the detection circuit itself according to the light signal and the detection signal from the control circuit, and transmits the detection results to the control circuit for judgment.

[0007] The present invention is further configured such that: the detection circuit includes a lamp detection circuit and a lamp control detection circuit, the lamp detection circuit is connected to the control circuit and the lamp signal, and outputs the lamp detection result to the control circuit, and the lamp control detection circuit is connected to the lamp control circuit and the control circuit, and transmits the detection result of the lamp control circuit to the control circuit.

[0008] The present invention is further configured such that: the lamp detection circuit includes a lamp detection first sub-circuit and a lamp detection second sub-circuit connected to each other, the output terminals of the lamp detection first sub-circuit and the lamp detection second sub-circuit are connected together and connected to the control circuit, the lamp detection second sub-circuit is connected to the lamp control circuit and is used to detect whether the lamp control circuit is working properly according to the lamp signal, and the lamp detection first sub-circuit is connected to the control circuit and is used to detect whether the lamp detection first sub-circuit is working properly according to the control signal.

[0009] The present invention is further configured such that: the first lamp detection sub-circuit includes a first switching circuit, the control terminal of the first switching circuit is connected to the control signal output terminal of the control circuit, and its output terminal is connected to the output terminal of the second lamp detection sub-circuit and the first detection signal input terminal of the control circuit, for detecting whether the lamp detection circuit is normal according to the lamp signal and the control signal.

[0010] The present invention is further configured such that the first switching circuit is a low-level active switching circuit.

[0011] The present invention is further configured such that: the second sub-circuit for lamp detection includes a unidirectional conduction circuit, the negative terminal of which is connected to the lamp signal output terminal, and the positive terminal of which is connected to the output terminal of the first sub-circuit for lamp detection and the first detection signal input terminal of the control circuit, for detecting whether the lamp control circuit is normal according to the lamp signal.

[0012] The present invention is further configured such that: the lamp control detection circuit includes a second switch circuit, a third switch circuit, and a fourth switch circuit. The control terminal of the second switch circuit is connected to the control signal output terminal of the control circuit, and its output terminal is grounded. Its input terminal is connected to the control terminal of the third switch circuit. The input terminal of the third switch circuit is connected to the lamp signal terminal. The output terminal of the third switch circuit is connected to the control terminal of the fourth switch circuit. The input terminal of the fourth switch circuit is connected to the power supply terminal through a resistor and serves as the second detection signal terminal of the control circuit.

[0013] The present invention is further configured such that: the second switching circuit is a high-level active switching circuit, the third switching circuit is a low-level active switching circuit, and the fourth switching circuit is a high-level active switching circuit.

[0014] The present invention is further configured such that: the control circuit includes a control chip and peripheral circuits, wherein the peripheral circuits are used to provide clock signals to the control chip.

[0015] The present invention is further configured such that: the lighting control circuit includes a lighting switch circuit, which is connected to the control circuit and the traffic signal light, and is used to control the traffic signal light to open or close according to the control signal of the control circuit, and output the lighting signal to the detection circuit.

[0016] Compared with the prior art, the beneficial technical effects of this application are as follows:

[0017] 1. This application achieves real-time detection of traffic lights by setting up a detection circuit to detect the status of the lights, the light control circuit, and the detection circuit according to different control signals and light control signals, thereby ensuring the normal display of traffic lights;

[0018] 2. Furthermore, this application sets up a lamp detection circuit and a lamp control detection circuit to detect whether the lamp and the lamp control circuit are normal, thereby realizing real-time detection of each part of the lamp control circuit, lamp, and lamp detection circuit, ensuring the normal operation of traffic lights and improving safety;

[0019] 3. Furthermore, this application not only tests the lamp and the lamp control circuit, but also tests the testing circuit, realizing comprehensive testing of traffic lights and ensuring that traffic lights work normally. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the detection device structure according to a specific embodiment of this application;

[0021] Figure 2 This is a schematic diagram of the control circuit structure according to a specific embodiment of this application;

[0022] Figure 3 This is a schematic diagram of a lamp control circuit structure according to a specific embodiment of this application;

[0023] Figure 4 This is a schematic diagram of a lamp detection circuit structure according to a specific embodiment of this application;

[0024] Figure 5 This is a schematic diagram of a lamp control detection circuit structure according to a specific embodiment of this application. Detailed Implementation

[0025] The present invention will be further described in detail below with reference to the accompanying drawings.

[0026] This application discloses a traffic signal light detection device, such as... Figure 1 As shown, it includes a control circuit, a lighting control circuit, and a detection circuit. The control circuit is connected to both the lighting control circuit and the detection circuit. The lighting control circuit is connected to the detection circuit. The output of the lighting control circuit is connected to one end of the traffic light, and the other end of the traffic light is connected to the first power supply VCC.

[0027] The control circuit outputs a light control signal L-OUTR to the light control circuit. Under the control of the light control signal, the light control circuit outputs a light signal OUTR, and the traffic light L turns on and off under the control of the light signal.

[0028] The control circuit outputs control signal SW4 to the detection circuit. The detection circuit uses the light signal OUTR and control signal SW4 to detect whether the traffic lights, the light control circuit, and the detection circuit are functioning correctly.

[0029] After receiving the lamp control signal L-OUTR, the lamp control circuit inverts it to obtain the lamp signal OUTR.

[0030] The detection circuit includes a lamp detection circuit and a lamp control detection circuit. The lamp detection circuit is used to detect the lamp status, whether the lamp control circuit and the lamp detection circuit are normal, and the lamp control detection circuit is used to detect the lamp status, whether the lamp control circuit and the lamp control detection circuit are normal.

[0031] The lamp detection circuit is connected to the control signal and the lamp signal as inputs, and outputs the lamp detection signal INR_0 to the control circuit. The control circuit determines whether the lamp is working properly based on the control signal, the lamp signal, and the lamp detection signal.

[0032] The input of the lighting control detection circuit is connected to the control signal and the lamp signal, and the output lighting control detection signal L_INR is given to the control circuit. The control circuit determines whether the lighting control circuit is normal based on the control signal, the lamp signal and the lighting control detection signal.

[0033] The control circuit includes a control chip and peripheral circuits, such as... Figure 2 As shown, the control chip U1 outputs the lamp control signal L-OUTR and the control signal SW4, and receives the lamp control detection signal L_INR and the lamp detection signal INR_0 transmitted from the detection circuit. Based on the lamp control signal, the control signal, the lamp detection signal, and the lamp control detection signal, it determines the lamp status, the lamp control circuit status, the lamp detection circuit status, and the lamp control detection circuit status.

[0034] The peripheral circuit includes a clock circuit for providing a clock to the control chip. The clock circuit includes a first clock circuit and a second clock circuit. The first clock circuit includes a crystal oscillator Y1, a capacitor C19, and a capacitor C20. One end of the crystal oscillator Y1 is connected to one end of the capacitor C19 and a pin PC14 of the control circuit. The other end of the crystal oscillator Y1 is connected to one end of the capacitor C20 and a pin PC15 of the control circuit. The other ends of the capacitors C19 and C20 are grounded to generate the first clock.

[0035] The second clock circuit includes crystal oscillator Y2, capacitor C21, and capacitor C22. One end of crystal oscillator Y2 is connected to one end of capacitor C21 and a pin PD0 of the control circuit. The other end of crystal oscillator Y2 is connected to one end of capacitor C22 and a pin PD1 of the control circuit. The other ends of capacitor C21 and capacitor C22 are grounded to generate the second clock.

[0036] The lighting control circuit includes a light switch circuit. The control terminal of the light switch circuit is connected to the control circuit, its output terminal is grounded, and its input terminal is connected to one end of the traffic light. The other end of the traffic light is connected to the first power supply VCC.

[0037] like Figure 3 As shown, the lighting control circuit includes a first resistor R1, a second resistor R2, and a lighting switch circuit. The lighting switch circuit includes a first switching transistor Q1. The control electrode of the switching transistor Q1 is connected to one end of the first resistor R1 and one end of the second resistor R2. The other end of the first resistor R1 is connected to the output terminal of the lighting control signal L-OUTR of the control circuit. The other end of the second resistor R2 is grounded. The output electrode of the switching transistor Q1 is grounded. The input electrode of the switching transistor Q1 is connected to one end of the traffic light and serves as the output terminal of the lighting signal. The other end of the traffic light is connected to the lighting power supply VCC.

[0038] The switching transistor Q1 is an N-type transistor. When the lamp control signal L-OUTR is high, the lamp switch circuit is turned on and the lamp signal is low; when the lamp control signal L-OUTR is low, the lamp switch circuit is turned off and the lamp signal is high.

[0039] The lamp detection circuit includes a first lamp detection sub-circuit and a second lamp detection sub-circuit connected to each other. For example... Figure 4 As shown, the first sub-circuit for lamp detection includes a second switch Q2. The switch Q2 and its peripheral resistors R3 and R4 form a first switching circuit. The control terminal of the switch Q2 is connected to the output terminal of the control signal SW4 of the control circuit and one end of the third resistor R3. The input terminal of the switch Q2 and the other end of the third resistor R3 are connected to the second power supply VDD. The output terminal of the switch Q2 is connected to one end of the fourth resistor R4. The other end of the fourth resistor R4 is connected to the input terminal of the lamp detection signal INR_0 of the control circuit.

[0040] The second switching transistor Q2 is a P-type transistor.

[0041] The second sub-circuit for lamp detection includes a diode D1 for unidirectional conduction. The positive terminal of diode D1 is connected to the lamp detection signal INR_0 input terminal of the control circuit, and the negative terminal is connected to the lamp signal output terminal OUTR.

[0042] The lighting control detection circuit includes a second switch circuit, a third switch circuit, and a fourth switch circuit, such as... Figure 5 As shown, the second switching circuit includes a fourth switching transistor Q4 and a fifth resistor R5. The control terminal of the fourth switching transistor Q4 is connected to the output terminal of the control signal SW4 of the control circuit and one end of the fifth resistor R5. The other end of the fifth resistor R5 is connected to the output terminal of the fourth switching transistor Q4 and grounded. The input terminal of the fourth switching transistor Q4 is connected to the control terminal of the third switching circuit.

[0043] The third switching circuit includes a third switching transistor Q3 and a sixth resistor R6. The control terminal of the third switching transistor Q3 is connected to the input terminal of the fourth switching transistor Q4 and one end of the sixth resistor R6. The input terminal of the third switching transistor Q3 and the other end of the sixth resistor R6 are connected to the lamp signal OUTR output terminal. The output terminal of the third switching transistor Q3 is connected to the control terminal of the fourth switching circuit.

[0044] The fourth switching circuit includes a fifth switching transistor Q5, a seventh resistor R7, and an eighth resistor R8. The control terminal of the fifth switching transistor Q5 and one end of the seventh resistor R7 are connected to the output terminal of the third switching circuit. The output terminal of the fifth switching transistor Q5 and the other end of the seventh resistor R7 are connected to the power supply ground. The input terminal of the fifth switching transistor Q5 is connected to one end of the eighth resistor R8 and serves as the output terminal of the lamp control detection signal L_INR. The other end of the eighth resistor R8 is connected to the power supply VDD.

[0045] Among them, the fourth switch Q4 and the fifth switch Q5 are N-type transistors, and the third switch Q3 is a P-type transistor.

[0046] When the control signal SW4 is high, the fourth switch Q4 is turned on. When the lamp signal OUTR is high, the third switch Q3 is turned on, the fifth switch Q5 is turned on, and the lamp control detection signal L_INR is low.

[0047] When the control signal SW4 is low, the fourth switch Q4 is turned off. If the lamp signal OUTR is low, the third switch Q3 is turned off, the fifth switch Q5 is turned off, and the lamp control detection signal L_INR is high.

[0048] The working principle of the detection circuit is as follows:

[0049] When the lamp control signal L-OUTR is high, after passing through the lamp control circuit, the lamp signal OUTR becomes low. After passing through the lamp detection circuit, the output lamp detection signal INR_0 is low, indicating that the first switch Q1 in the lamp control circuit is normal and undamaged. At this time, the lamp detection does not work. At this time, the control signal SW4 is set to low, the fifth switch Q5 is cut off, and the lamp detection signal L_INR is high.

[0050] When the light control signal L-OUTR is low, the first switch Q1 is off, and the light signal OUTR is high. At this time, setting the control signal SW4 to high turns on the fourth switch Q4, the third switch Q3, and the fifth switch Q5. The light control detection signal L_INR is low, indicating that the traffic light is normal and undamaged. At this time, the second switch Q2 is off.

[0051] When the lamp control signal L-OUTR is low, the first switch Q1 is off, and the lamp signal OUTR is high. At this time, when the control signal SW4 is low, the second switch Q2 is on. When one end of the fourth resistor R4 is high and the negative end of the diode D1 is also high, the lamp detection signal INR_0 is high, indicating that the lamp detection circuit is normal and undamaged.

[0052] When the lamp control signal L-OUTR is low, the first switch Q1 is off, and the lamp signal OUTR is high. At this time, setting the control signal SW4 to low will cause the fourth switch Q4, the third switch Q3, and the fifth switch Q5 to be off. The lamp control detection signal L_INR will then be high, indicating that the lamp control detection circuit is normal and undamaged.

[0053] The above are all preferred embodiments of the present invention and are not intended to limit the scope of protection of the present invention. Therefore, all equivalent changes made in accordance with the structure, shape and principle of the present invention should be covered within the scope of protection of the present invention.

Claims

1. A traffic signal detection apparatus characterized by: The control circuit, the detection circuit and the lamp control circuit are connected respectively, the lamp control circuit is used for controlling the opening or closing of the traffic signal lamp according to the control signal of the control circuit, and outputs the lamp signal to the detection circuit, the detection circuit is used for detecting the traffic signal lamp, the lamp control circuit and the detection circuit itself according to the lamp signal and the detection signal given by the control circuit, and transmitting the detection result to the control circuit for judgment, the detection circuit includes the lamp detection circuit and the lamp control detection circuit, the lamp detection circuit is connected with the control circuit and the lamp signal, and is used for detecting whether the lamp state, the lamp control circuit and the lamp detection circuit are normal, the lamp control detection circuit is connected with the lamp control circuit and the control circuit, and is used for detecting whether the lamp state, the lamp control circuit and the lamp control detection circuit are normal, the lamp detection circuit includes the lamp detection first sub-circuit and the lamp detection second sub-circuit connected with each other, the output ends of the lamp detection first sub-circuit and the lamp detection second sub-circuit are connected together and connected with the control circuit, the lamp detection second sub-circuit is connected with the lamp control circuit, and is used for detecting whether the lamp control circuit works normally according to the lamp signal, the lamp detection first sub-circuit is connected with the control circuit, and is used for detecting whether the lamp detection first sub-circuit works normally according to the control signal, the lamp control detection circuit includes the second switch circuit, the third switch circuit and the fourth switch circuit, the control end of the second switch circuit is connected with the control signal output end of the control circuit, the output end thereof is grounded, and the input end thereof is connected with the control end of the third switch circuit, the input end of the third switch circuit is connected with the lamp signal end, the output end of the third switch circuit is connected with the control end of the fourth switch circuit, and the input end of the fourth switch circuit is connected with the power supply end through a resistor and serves as the second detection signal end of the control circuit.

2. The traffic signal detection apparatus according to claim 1, characterized by: The lamp detection first sub-circuit includes the first switch circuit, the control end of the first switch circuit is connected with the control signal output end of the control circuit, the output end thereof is connected with the output end of the lamp detection second sub-circuit and the first detection signal input end of the control circuit, and is used for detecting whether the lamp detection circuit is normal according to the lamp signal and the control signal.

3. The traffic signal detection apparatus of claim 2, wherein: The first switch circuit is a low-level effective switch circuit.

4. The traffic signal detection apparatus of claim 1, wherein: The lamp detection second sub-circuit includes the unidirectional conduction circuit, the negative end of the unidirectional conduction circuit is connected to the lamp signal output end, the positive end of the unidirectional conduction circuit, the output end of the lamp detection first sub-circuit and the first detection signal input end of the control circuit are connected, and are used for detecting whether the lamp control circuit is normal according to the lamp signal.

5. The traffic signal detection apparatus of claim 1, wherein: The second switch circuit is a high-level effective switch circuit, the third switch circuit is a low-level effective switch circuit, and the fourth switch circuit is a high-level effective switch circuit.

6. The traffic signal detection apparatus of claim 1, wherein: The control circuit includes the control chip and the peripheral circuit, and the peripheral circuit is used for providing the clock signal for the control chip.

7. The traffic signal detection apparatus of claim 1, wherein: The lamp control circuit includes the lamp switch circuit, and is connected with the control circuit and the traffic signal lamp, and is used for controlling the opening or closing of the traffic signal lamp according to the control signal of the control circuit and outputting the lamp signal to the detection circuit.

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