CN210865095U - Road traffic signal lamp driving and detecting circuit - Google Patents
Road traffic signal lamp driving and detecting circuit Download PDFInfo
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- CN210865095U CN210865095U CN201922303748.XU CN201922303748U CN210865095U CN 210865095 U CN210865095 U CN 210865095U CN 201922303748 U CN201922303748 U CN 201922303748U CN 210865095 U CN210865095 U CN 210865095U
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- 238000001514 detection method Methods 0.000 claims abstract description 49
- XUIMIQQOPSSXEZ-UHFFFAOYSA-N Silicon Chemical compound [Si] XUIMIQQOPSSXEZ-UHFFFAOYSA-N 0.000 claims abstract description 12
- 229910052710 silicon Inorganic materials 0.000 claims abstract description 12
- 239000010703 silicon Substances 0.000 claims abstract description 12
- 238000010521 absorption reaction Methods 0.000 claims description 7
- 230000002457 bidirectional effect Effects 0.000 claims description 6
- 239000003990 capacitor Substances 0.000 claims description 6
- 230000008054 signal transmission Effects 0.000 abstract 1
- 238000010586 diagram Methods 0.000 description 2
- 206010039203 Road traffic accident Diseases 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000005070 sampling Methods 0.000 description 1
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Abstract
The utility model provides a road traffic signal lamp drive and detection circuitry can be used to control signal lamp L1 and open and close and detect signal lamp L1 on-off state, the on-off signal of control signal lamp power is sent with silicon controlled rectifier Q1 to electronic switch control circuit among the drive circuit, the on-off signal transmission action of silicon controlled rectifier Q1 is controlled by photoelectric coupler U1 among the drive circuit; the photoelectric coupler U1 is driven by an externally input control signal; the detection circuit is a signal lamp state detection circuit for detecting the on-off state of the signal lamp L1, and the detection circuit comprises a diode and a photoelectric coupler; the utility model discloses can realize the function of the traditional drive circuit of traffic signal controller reliably with more succinct electronic circuit structure.
Description
Technical Field
The utility model belongs to the technical field of the traffic signal lamp control technique and specifically relates to a road traffic signal lamp drive and detection circuitry.
Background
In an urban road traffic system, a traffic signal lamp is one of the most important terminal devices for urban road traffic management and control, and the on and off of the traffic signal lamp is controlled by a driving circuit in a road traffic signal controller. But sometimes signals are erroneous for some reasons, including: 1) the signal error of the controlled silicon is controlled to cause the signal error of the intersection; 2) the damage of the thyristor leads to signal error. 3) Signal lamps are connected in parallel by unknown external voltages resulting in signal errors. The signal error not only causes traffic jam, but also even traffic accidents, and causes serious economic loss.
According to the national standard, a driving circuit needs to have the capacity of sampling the state of a signal lamp in real time, although the signal lamp driving circuits of domestic manufacturers at present all comprise detection circuits, most of the signal lamp driving circuits use transformers and rectifiers or other electronic components, and one detection circuit usually comprises a current detection circuit and a voltage detection circuit, so that the circuit scale and the size of the driving plate are increased, and the cost is increased.
Disclosure of Invention
The utility model provides a road traffic signal lamp drive and detection circuitry can realize the traditional drive circuit's of traffic signal controller function reliably with more succinct electronic circuit structure.
The utility model adopts the following technical scheme.
A road traffic signal lamp driving and detecting circuit can be used for controlling the on-off of a signal lamp L1 and detecting the on-off state of a signal lamp L1, an electronic switch control circuit in the driving circuit sends out an on-off signal for controlling the power supply of the signal lamp through a silicon controlled rectifier Q1, and the on-off signal sending action of the silicon controlled rectifier Q1 is controlled by a photoelectric coupler U1 in the driving circuit; the photoelectric coupler U1 is driven by an externally input control signal; the detection circuit is a signal lamp state detection circuit for detecting the on-off state of the signal lamp L1, and the detection circuit comprises a diode and a photoelectric coupler.
The power supply circuit of the signal lamp is connected with a resistor R24 with the resistance value far larger than that of the signal lamp resistor in parallel; the resistor R24 is connected in series with the traffic light status detection circuit, and when the traffic light is turned on, the current at the resistor R24 forms an electrical signal that can be detected by the traffic light status detection circuit.
The signal lamp state detection circuit comprises a photoelectric coupler of which the input end is connected with a resistor R22 in series; the output stage of the photoelectric coupler is a photosensitive triode U2; an emitter of the phototriode U2 is an output end W1 of the detection circuit, a capacitor C21 is connected between the emitter of the phototriode U2 and a signal ground in parallel, and a collector of the phototriode U2 is connected to a working power supply of the signal lamp state detection circuit through a resistor R23 in series; the phototriode U2 is also connected in parallel with diodes D22, D23 and D24.
The working power supply voltage of the signal lamp state detection circuit is 5V.
The signal lamp state detection circuit does not comprise an alternating voltage device and a rectifier.
The photoelectric coupler U1 is driven by a control signal input by an external signal machine; the driving circuit comprises a photoelectric coupler U1 and a bidirectional thyristor Q1; the photoelectric coupler U1 is a photosensitive triode; a first pin of the photosensitive triode U1 is connected to a working power supply of the driving circuit through a series resistor R11, and a second pin of the photosensitive triode U1 is connected with a control signal output end of the signal machine; the thyristor Q1 is connected with a gate resistor R12 and a current-limiting resistor R13; a surge absorption circuit used for keeping the controlled silicon Q1 is further arranged at the driving circuit; the surge absorption circuit is composed of a resistor R14 and a capacitor C11.
The working voltages of the signal lamp L1 and the electronic switch control circuit are both 220V; the electronic switch control circuit is a zero-crossing trigger circuit consisting of a photoelectric coupler U1 and a bidirectional thyristor Q1.
The beneficial effects of the utility model are that it bears road traffic signal lamp drive and state detection function with new circuit structure, only just can realize detecting signal lamp return current or the function of signal lamp both ends voltage with a detection circuitry moreover, reduced circuit scale and drive plate size, the cost is reduced has improved the reliability.
Drawings
The invention will be described in further detail with reference to the following drawings and detailed description:
FIG. 1 is a schematic diagram of the circuit principle of the present invention;
FIG. 2 is a schematic circuit diagram of the present invention;
in the figure: 1-a drive circuit; 2-signal lamp state detection circuit; 3-surge absorption circuit.
Detailed Description
As shown in fig. 1-2, a driving and detecting circuit for a road traffic signal lamp can be used for controlling the on-off of a signal lamp L1 and detecting the on-off state of a signal lamp L1, an electronic switch control circuit in the driving circuit sends an on-off signal for controlling a signal lamp power supply through a silicon controlled rectifier Q1, and the sending action of the on-off signal of the silicon controlled rectifier Q1 is controlled by a photoelectric coupler U1 in the driving circuit; the photoelectric coupler U1 is driven by an externally input control signal; the detection circuit is a signal lamp state detection circuit for detecting the on-off state of the signal lamp L1, and the detection circuit comprises a diode and a photoelectric coupler.
The power supply circuit of the signal lamp is connected with a resistor R24 with the resistance value far larger than that of the signal lamp resistor in parallel; the resistor R24 is connected in series with the traffic light status detection circuit, and when the traffic light is turned on, the current at the resistor R24 forms an electrical signal that can be detected by the traffic light status detection circuit.
The signal lamp state detection circuit comprises a photoelectric coupler of which the input end is connected with a resistor R22 in series; the output stage of the photoelectric coupler is a photosensitive triode U2; an emitter of the phototriode U2 is an output end W1 of the detection circuit, a capacitor C21 is connected between the emitter of the phototriode U2 and a signal ground in parallel, and a collector of the phototriode U2 is connected to a working power supply of the signal lamp state detection circuit through a resistor R23 in series; the phototriode U2 is also connected in parallel with diodes D22, D23 and D24.
The working power supply voltage of the signal lamp state detection circuit is 5V.
The signal lamp state detection circuit does not comprise an alternating voltage device and a rectifier.
The photoelectric coupler U1 is driven by a control signal input by an external signal machine; the driving circuit comprises a photoelectric coupler U1 and a bidirectional thyristor Q1; the photoelectric coupler U1 is a photosensitive triode; a first pin of the photosensitive triode U1 is connected to a working power supply of the driving circuit through a series resistor R11, and a second pin of the photosensitive triode U1 is connected with a control signal output end of the signal machine; the thyristor Q1 is connected with a gate resistor R12 and a current-limiting resistor R13; a surge absorption circuit used for keeping the controlled silicon Q1 is further arranged at the driving circuit; the surge absorption circuit is composed of a resistor R14 and a capacitor C11.
The working voltages of the signal lamp L1 and the electronic switch control circuit are both 220V; the electronic switch control circuit is a zero-crossing trigger circuit consisting of a photoelectric coupler U1 and a bidirectional thyristor Q1.
In this example, since a resistor R24 with a large resistance is connected in parallel to the loop of the traffic light L1, the shunt to the traffic light is negligible since the resistance is much larger than the traffic light resistor.
When the thyristor Q1 is turned off, if the signal lamp L1 is lit with an unknown voltage applied thereto, a loop current is detected by the detection circuit. With this circuit design, as shown in fig. 2, the detection function of the signal lamp loop current or the voltage across the signal lamp can be achieved by only using one detection circuit, and there is no need to use one current detection circuit and one voltage detection circuit. Due to the design, the circuit scale and the size of the driving plate are reduced, the cost is reduced, and the reliability is improved.
Claims (7)
1. The utility model provides a road traffic signal lamp drive and detection circuitry, can be used to control signal lamp L1 and open and close and detect signal lamp L1 and open and close the state, its characterized in that: an electronic switch control circuit in a driving circuit of the driving and detecting circuit sends out an on-off signal for controlling a signal lamp power supply through a silicon controlled rectifier Q1, and the on-off signal sending action of the silicon controlled rectifier Q1 is controlled by a photoelectric coupler U1 in the driving circuit; the photoelectric coupler U1 is driven by an externally input control signal; the detection circuit is a signal lamp state detection circuit for detecting the on-off state of the signal lamp L1, and the detection circuit comprises a diode and a photoelectric coupler.
2. The driving and detecting circuit of a road traffic signal lamp as claimed in claim 1, wherein: the power supply circuit of the signal lamp is connected with a resistor R24 with the resistance value far larger than that of the signal lamp resistor in parallel; the resistor R24 is connected in series with the traffic light status detection circuit, and when the traffic light is turned on, the current at the resistor R24 forms an electrical signal that can be detected by the traffic light status detection circuit.
3. The driving and detecting circuit of a road traffic signal lamp as claimed in claim 2, wherein: the signal lamp state detection circuit comprises a photoelectric coupler of which the input end is connected with a resistor R22 in series; the output stage of the photoelectric coupler is a photosensitive triode U2; an emitter of the phototriode U2 is an output end W1 of the detection circuit, a capacitor C21 is connected between the emitter of the phototriode U2 and a signal ground in parallel, and a collector of the phototriode U2 is connected to a working power supply of the signal lamp state detection circuit through a resistor R23 in series; the phototriode U2 is also connected in parallel with diodes D22, D23 and D24.
4. The driving and detecting circuit of a road traffic signal lamp as claimed in claim 3, wherein: the working power supply voltage of the signal lamp state detection circuit is 5V.
5. The driving and detecting circuit of a road traffic signal lamp as claimed in claim 2, wherein: the signal lamp state detection circuit does not comprise an alternating voltage device and a rectifier.
6. The driving and detecting circuit of a road traffic signal lamp as claimed in claim 1, wherein: the photoelectric coupler U1 is driven by a control signal input by an external signal machine; the driving circuit comprises a photoelectric coupler U1 and a bidirectional thyristor Q1; the photoelectric coupler U1 is a photosensitive triode; a first pin of the photosensitive triode U1 is connected to a working power supply of the driving circuit through a series resistor R11, and a second pin of the photosensitive triode U1 is connected with a control signal output end of the signal machine; the thyristor Q1 is connected with a gate resistor R12 and a current-limiting resistor R13; a surge absorption circuit used for keeping the controlled silicon Q1 is further arranged at the driving circuit; the surge absorption circuit is composed of a resistor R14 and a capacitor C11.
7. The driving and detecting circuit of a road traffic signal lamp as claimed in claim 1, wherein: the working voltages of the signal lamp L1 and the electronic switch control circuit are both 220V; the electronic switch control circuit is a zero-crossing trigger circuit consisting of a photoelectric coupler U1 and a bidirectional thyristor Q1.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922303748.XU CN210865095U (en) | 2019-12-20 | 2019-12-20 | Road traffic signal lamp driving and detecting circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201922303748.XU CN210865095U (en) | 2019-12-20 | 2019-12-20 | Road traffic signal lamp driving and detecting circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN210865095U true CN210865095U (en) | 2020-06-26 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201922303748.XU Expired - Fee Related CN210865095U (en) | 2019-12-20 | 2019-12-20 | Road traffic signal lamp driving and detecting circuit |
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| Country | Link |
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| CN (1) | CN210865095U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112907820A (en) * | 2021-02-02 | 2021-06-04 | 深圳市乐科智控科技有限公司 | Automatic vending machine and goods outlet switch control system and method thereof |
-
2019
- 2019-12-20 CN CN201922303748.XU patent/CN210865095U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN112907820A (en) * | 2021-02-02 | 2021-06-04 | 深圳市乐科智控科技有限公司 | Automatic vending machine and goods outlet switch control system and method thereof |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20200626 |