Signal lamp control device and signal lamp

Abstract

A signal lamp control device and a signal lamp relate to the technical field of traffic control and comprise a single-chip microcomputer, a voltage sampling circuit connected with the single-chip microcomputer and a lamp driving circuit connected with the single-chip microcomputer. The number of the voltage sampling circuits is more than one, and the number of the lamp driving circuits is also more than one. The single-chip microcomputer is also connected with a wireless transmit-receive mechanism, and the wireless transmit-receive mechanism is in communication connection with one serial port of the single-chip microcomputer. The color state of the input signal of the signal lamp is obtained through the voltage sampling circuit, and the output color of each signal lamp is interacted with each signal lamp at the intersection through the wireless transceiver module, so that the comparison between the signal output color of the signal lamp and the output color of the signal lamp in the intersection direction is realized.

Description

Technical Field

[0001] The utility model relates to the technical field of traffic control, in particular to a signal light control device and a signal light. Background Art

[0002] Traffic light control devices and signal lights are the basic infrastructure for urban traffic signal command. The command center controls the traffic signal machine through the network to output electrical signals, lights up the traffic light control devices and signal lights through cables, and transmits traffic command signals to road traffic participants. Among them, the link between the signal machine and the signal light control device and signal light is the most vulnerable. Failure of the driver board, cable, signal light control device and signal light will cause control signal errors.

[0003] When a phase conflict fault occurs in the input signal of the current signal light control device and signal light, the signal light control device and signal light cannot recognize that there is an error in the input signal and can only passively light up the wrong light color according to the input signal, causing doubts to the driver and disrupting the normal traffic order.

[0004] Therefore, it is urgent to develop a signal light control device and a signal light to solve the problems in the prior art. Utility Model Content

[0005] The utility model aims to provide a signal light control device and a signal light, which can exchange the output colors of the signal lights at the intersection by setting a wireless transceiver mechanism, so as to solve the problem that the signal light cannot recognize the error of the input signal proposed in the above background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A signal light control device comprises a single chip microcomputer, a voltage sampling circuit connected to the single chip microcomputer and a light driving circuit connected to the single chip microcomputer; the voltage sampling circuit is provided with more than one, and the light driving circuit is also provided with more than one; the single chip microcomputer is also connected to a wireless transceiver mechanism, and the wireless transceiver mechanism is connected to a serial port of the single chip microcomputer for communication.

[0008] Furthermore, the voltage sampling circuit includes a rectifier bridge, a voltage-dividing resistor and an optocoupler; the voltage-dividing resistor is connected to the rectifier bridge; one end of the optocoupler is connected to the voltage-dividing resistor, and the other end is connected to the single-chip microcomputer.

[0009] Furthermore, the voltage sampling circuit also includes an indicator light, and the indicator light is electrically connected to the voltage dividing resistor and the optical coupler respectively.

[0010] Furthermore, the lamp driving circuit includes a transistor and a MOSFET, the base of the transistor is connected to the interface of the single-chip microcomputer, the emitter of the transistor is grounded, the gate of the MOSFET is connected to the collector of the transistor, the drain of the MOSFET is connected to a 24V power supply, and the source of the MOSFET is used to connect to the light-emitting unit of the signal lamp.

[0011] Furthermore, it also includes a power supply unit, which includes a switching power supply and a regulated power supply. The input end of the switching power supply is connected to the output end of the rectifier bridge, the output end of the switching power supply is connected to the regulated power supply, and the regulated power supply is connected to the single-chip microcomputer to power the single-chip microcomputer.

[0012] Furthermore, the output end of the switching power supply is also connected to the drain of the MOS tube of the lamp driving circuit.

[0013] Furthermore, it also includes a satellite positioning mechanism, which is connected to the serial port of the single-chip microcomputer for communication.

[0014] Furthermore, the satellite positioning mechanism includes a GPS chip, and the wireless transceiver mechanism includes a LORA module.

[0015] Furthermore, it also includes a light-emitting unit, wherein more than one light-emitting unit is provided and the light-emitting unit is connected to the lamp driving circuit. The number of the voltage sampling circuit, the lamp driving circuit and the light-emitting unit is the same.

[0016] A signal light comprises a signal light body and the signal light control device, wherein the signal light control device is arranged in the signal light body.

[0017] Compared with the prior art, the beneficial effects of the utility model are: reading the color state of the signal input signal of the signal light corresponding to the control device through the voltage sampling circuit, and exchanging the output color of each light with the signal lights at the intersection through the wireless transceiver module, so as to realize the comparison between the output color of the corresponding light signal and the output color of the cross direction signal light.

[0018] Other features and advantages of the present invention will be disclosed in detail in the following specific implementations and drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0020] Figure 2 It is a circuit schematic diagram of the voltage sampling circuit of the utility model;

[0021] Figure 3 It is the circuit principle diagram of the utility model single chip microcomputer;

[0022] Figure 4 This is a circuit schematic diagram of the lamp drive circuit of the utility model;

[0023] Figure 5 It is the circuit principle diagram of the wireless transceiver mechanism of the utility model;

[0024] Figure 6 This is a circuit schematic diagram of the satellite positioning mechanism of the utility model;

[0025] Figure 7 It is a circuit principle diagram of the power supply unit of the utility model.

[0026] Explanation of the markings in the figure: 1. Voltage sampling circuit; 2. Lamp driving circuit; 3. Power supply circuit; 4. Light-emitting unit. DETAILED DESCRIPTION

[0027] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0028] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0029] Signal light control devices, such as Figure 1 As shown, it includes a single-chip microcomputer, a voltage sampling circuit 1 connected to the single-chip microcomputer, a lamp driving circuit 2 connected to the single-chip microcomputer, and a power supply circuit 3 connected to the single-chip microcomputer; the single-chip microcomputer is also electrically connected to a satellite positioning mechanism and a wireless transceiver mechanism, the satellite positioning mechanism is connected to a serial port of the single-chip microcomputer for communication, and the wireless transceiver mechanism is connected to another serial port of the single-chip microcomputer for communication.

[0030] The voltage sampling circuit 1 is used to convert an AC voltage signal into a DC voltage signal. The single chip microcomputer reads the color state of the input signal of the signal light corresponding to the control device through the voltage sampling circuit 1.

[0031] In this embodiment, the voltage sampling circuit 1 includes a rectifier bridge connected to an AC power supply, a voltage-dividing resistor connected to the rectifier bridge, an indicator light connected to the voltage-dividing resistor, and an optocoupler connected to the indicator light, which can convert a 220VAC AC voltage signal into a 5V DC voltage signal. The optocoupler is connected to the single-chip microcomputer to provide a DC voltage signal to the single-chip microcomputer.

[0032] like Figure 2 As shown, the voltage sampling circuit 1 includes an interface J1 for connecting to 220VAC, the first, second and third ends of the interface J1 are respectively used to connect to the L line of R / Y / G, and the fourth end is used to connect to the N line. The first end, the second end and the third end of the interface J1 are respectively connected to the fourth end of the first rectifier bridge D3, the second rectifier bridge D4 and the third rectifier bridge D5.

[0033] Taking the red light as an example, the first end of the first rectifier bridge D3 is connected to one end of the voltage-dividing resistor R4, the other end of the voltage-dividing resistor R4 is connected to the cathode of the light-emitting diode D7, one end of the resistor R7 and the first end of the optocoupler U1, the anode of the light-emitting diode D7, the other end of the resistor R7 and the second end of the optocoupler U1 are connected to the N line. The third end of the optocoupler U1 is grounded, the fourth end is connected to the sixth pin of the single-chip microcomputer, and outputs a 5V current through the resistor R1. The second end of the first rectifier bridge is connected to the switching power supply, the third end is connected to the N line, and the fourth end is connected to the red light L line.

[0034] The single chip microcomputer controls the output color of the signal light through the light driving circuit 2. Figure 4 As shown, a lamp driving circuit 2 includes a transistor and a MOS tube, the base of the transistor is connected to the interface of the single-chip microcomputer, the emitter of the transistor is grounded, the gate of the MOS tube is connected to the collector of the transistor, the drain of the MOS tube is connected to a 24V power supply, and the source of the MOS tube is connected to one end of the output interface. The output interface is used to connect to the light-emitting unit 4, and the other end of the output interface is grounded. The single-chip microcomputer controls the light-emitting unit 4 of the signal light through the transistor and the MOS tube connected to the transistor to realize the control of the output color of the signal light. The light-emitting unit 4 of the signal light is a prior art, which is used to display the output color of the signal light, and this application will not repeat it.

[0035] The wireless transceiver module is used to communicate with other traffic lights at the intersection to exchange their respective positions and traffic light colors. Figure 5As shown, the wireless transceiver module is a LORA module, a first end of which is connected to the 27th pin of the single-chip microcomputer through a resistor R24, a second end is connected to the 28th pin of the single-chip microcomputer through a resistor R25, a third end is connected to the 16th pin of the single-chip microcomputer through a resistor R30, a fourth end is connected to the 15th pin of the single-chip microcomputer through a resistor R31, a sixth end is connected to a power supply, and a seventh end is grounded. The LORA module is a prior art and can be purchased, and this application will not repeat it.

[0036] The present application sets a voltage sampling circuit 1 to read the input signal color state of the traffic light corresponding to the control device, and exchanges the output color of each traffic light with the lights at the intersection through a wireless transceiver module to achieve a comparison between the output color of the corresponding light signal and the output color of the cross direction signal light.

[0037] The satellite positioning mechanism is used to obtain the position information of the traffic light and determine the position of the traffic light at the intersection. Figure 6 As shown, the satellite positioning mechanism includes a GPS chip, which is a prior art and can be purchased, and is not described in detail in this application. Its 20th and 21st pins are respectively connected to the 21st and 22nd pins of the single-chip microcomputer.

[0038] It also includes a power supply unit, which includes a switching power supply and a regulated power supply. The input end of the switching power supply is connected to the output end of the rectifier bridge, and the output end of the switching power supply is respectively connected to the drain of the MOS tube of the lamp driving circuit 2 and the regulated power supply. The light-emitting unit 4 is powered by the MOS tube, and the single-chip microcomputer is powered by the regulated power supply.

[0039] like Figure 7 As shown, the first ends of the first rectifier bridge D3, the second rectifier bridge D4 and the third rectifier bridge D5 are connected to the switching power supply through the interface J2 after passing through the diodes, the switching power supply outputs a 24V voltage, which is connected to the first end of the voltage-stabilized power supply U5, and the third end of the voltage-stabilized power supply U5 outputs a 5V voltage. The first end of the voltage-stabilized power supply is also grounded through the capacitor C8, the second end is grounded, and the third end is also grounded through the capacitor C9.

[0040] The light-emitting unit 4 is connected to the lamp driving circuit 2, and includes an LED light-emitting pattern and a current-limiting resistor. The lamp driving circuit 2 is connected to the LED light-emitting pattern to supply power to the LED light-emitting pattern. The LED light-emitting pattern is connected to the current-limiting resistor, and the current-limiting resistor is grounded.

[0041] When in use, 220VAC AC signal is input, rectified by rectifier bridge ABS210, one way is output to 12W / 24V switching power supply input, 12W / 24V switching power supply outputs 24VDC power, one way is sent to voltage stabilizer power supply CJ7805 to generate 5VDC power required by microcontroller, and the other way is sent to three PMOS switches as output power to light-emitting unit 4.

[0042] Light drive circuit 2 is composed of 3-way PMOS tube AO3401 and NPN transistor MMBT3904. The base of the transistor is controlled by the IO port of the single-chip microcomputer. The three-way PMOS tube controls the red, yellow and green lights of the corresponding signal lights. The TTL serial port 1 of the single-chip microcomputer is connected to the Lora communication module to perform two-way communication with the intersection signal lights, which is used to send the status of the light to other signal lights and read the status of other signal lights at the intersection.

[0043] The other path of the rectifier bridge ABS210 passes through the voltage divider resistor 150K / 4.7K, connects to the LED indicator, and then connects to the input end of EL817. After the optocoupler EL817 isolates and outputs a 5V square wave signal to the IO input pin of the microcontroller STC15w408AS, forming a voltage sampling circuit 1. The microcontroller identifies the color of the input signal light by inputting the corresponding IO signal.

[0044] Among them, the optocoupler output voltage is a square wave pulse waveform. The microcontroller uses the rising and falling edge transitions of the waveform as triggers to record the moment and duration of the signal input. Each input optocoupler corresponds to a certain input signal terminal. For example, if the signal input from the left-turn red terminal is detected by the microcontroller through the optocoupler, it is considered to be a left-turn red signal input. It is necessary to confirm that the wiring must be correct during construction.

[0045] The TTL serial port 2 of the single-chip microcomputer is connected to a pluggable satellite positioning mechanism to provide the location information of the installation point for the traffic light. The traffic light can determine the position of its own light and the traffic lights in the crossing direction through the location information of each light at the intersection. At the same time, a pluggable satellite positioning mechanism interface is provided. Users can also choose not to install the satellite positioning mechanism, but to write the location information through a handheld device.

[0046] Working method:

[0047] After the signal light is powered on for the first time, the microcontroller can read the location information recorded in the built-in read-only memory EEPROM. If there is no record, the location information is obtained by reading the message sent by the satellite positioning mechanism through TTL serial port 2.

[0048] The microcontroller determines the current color of the signal light and eliminates induced electrical interference by measuring the strength difference of the signal changes of the three IO inputs connected to the optocoupler.

[0049] After receiving the input signal light color, the microcontroller first controls the light drive circuit 2 to light up the LED display unit of the corresponding color according to the input signal, and then exchanges position information, input signal light color, current actual signal light color and other information with other signal lights at the intersection through the Lora module connected to the TTL serial port 1. Each signal light obtains the lighting status of all signal lights at the entire intersection.

[0050] The single chip microcomputer then determines whether the current traffic light and the traffic light in the intersecting direction are both green. If both are green, it means that the current traffic light is in a conflicting phase. In this case, the error output can be turned off and the traffic light can be changed to flashing yellow, thereby avoiding traffic in two intersecting directions being released at the same time, causing congestion at the intersection.

[0051] A signal light comprises a signal light housing and the signal light control device.

[0052] The utility model provides a signal light control device and a signal light, which have simple structure, convenient use and high reliability.

[0053] It is obvious to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0054] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A signal light control device, characterized in that: It includes a single-chip microcomputer, a voltage sampling circuit connected to the single-chip microcomputer, and a lamp driving circuit connected to the single-chip microcomputer; there are more than one voltage sampling circuit and more than one lamp driving circuit; the single-chip microcomputer is also connected to a wireless transceiver mechanism, and the wireless transceiver mechanism is connected to a serial port of the single-chip microcomputer for communication.

2. The signal light control device according to claim 1, characterized in that: The voltage sampling circuit comprises a rectifier bridge, a voltage-dividing resistor and an optical coupler; the voltage-dividing resistor is connected to the rectifier bridge; one end of the optical coupler is connected to the voltage-dividing resistor, and the other end is connected to the single-chip microcomputer.

3. The signal light control device according to claim 2, characterized in that: The voltage sampling circuit also includes an indicator light, which is electrically connected to the voltage dividing resistor and the optical coupler respectively.

4. The signal light control device according to claim 2, characterized in that: The lamp driving circuit includes a transistor and a MOSFET, the base of the transistor is connected to the interface of the single-chip microcomputer, the emitter of the transistor is grounded, the gate of the MOSFET is connected to the collector of the transistor, the drain of the MOSFET is used to connect to a power supply, and the source of the MOSFET is used to connect to a light-emitting unit of a signal lamp.

5. The signal light control device according to claim 4, characterized in that: It also includes a power supply unit, which includes a switching power supply and a regulated power supply. The input end of the switching power supply is connected to the output end of the rectifier bridge, the output end of the switching power supply is connected to the regulated power supply, and the regulated power supply is connected to the single-chip microcomputer.

6. The signal light control device according to claim 5, characterized in that: The output end of the switching power supply is also connected to the drain of the MOS tube of the lamp driving circuit.

7. The signal light control device according to any one of claims 1 to 6, characterized in that: It also includes a satellite positioning mechanism, which is connected to the serial port of the single-chip microcomputer for communication.

8. The signal light control device according to claim 7, characterized in that: The satellite positioning mechanism includes a GPS chip, and the wireless transceiver mechanism includes a LORA module.

9. The signal light control device according to any one of claims 1 to 6, characterized in that: It also includes a light emitting unit, wherein more than one light emitting unit is provided and the light emitting unit is connected to the lamp driving circuit.

10. A signal light, characterized in that: It comprises a signal light body and a signal light control device as claimed in any one of claims 1 to 9, wherein the signal light control device is arranged in the signal light body.

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