CN113129619A - Safety signal lamp control system and method - Google Patents
Safety signal lamp control system and method Download PDFInfo
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- CN113129619A CN113129619A CN202110515420.3A CN202110515420A CN113129619A CN 113129619 A CN113129619 A CN 113129619A CN 202110515420 A CN202110515420 A CN 202110515420A CN 113129619 A CN113129619 A CN 113129619A
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- 238000012423 maintenance Methods 0.000 abstract description 8
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/09—Arrangements for giving variable traffic instructions
- G08G1/095—Traffic lights
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- G—PHYSICS
- G08—SIGNALLING
- G08G—TRAFFIC CONTROL SYSTEMS
- G08G1/00—Traffic control systems for road vehicles
- G08G1/07—Controlling traffic signals
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Abstract
The invention discloses a safety signal lamp control system and a method, and the safety signal lamp control system mainly comprises a signal host, a transformer connected to the signal host and a safety signal lamp connected with the transformer. The beneficial effect of this patent lies in: the safety voltage is used, and even if the problems of electric leakage of the equipment case, cable aging and the like occur, the power utilization safety coefficient is continuously reduced, and the safety of personnel can not be endangered. And secondly, the safe voltage is supplied to the cable, so that the joule heating effect is reduced, the electric power is saved to a certain extent, and the durable use degree of the cable is improved. Thirdly, original supply cable and signal cable have been optimized to this patent, share supply cable and signal cable as a cable, significantly reduced construction cost and maintenance cost, take an intersection as an example, reducible construction cost and subsequent maintenance cost of at least 10000 yuan. Fourthly, the subsequent mobile signal lamp is quite convenient to use.
Description
Technical Field
The invention relates to a control system, in particular to a control system used in the field of traffic signal lamps, and belongs to the technical field of intelligent traffic signal lamp control.
Background
With the continuous expansion of urban scale and the increase of roads and motor vehicles, the level of the technology of road traffic management is also continuously improved. The traffic signal controller (hereinafter referred to as signal machine) is used as an important device for controlling traffic signals at the intersection, and the product type is evolved in a fixed timing mode, a multi-period timing mode, an induction mode and a centralized coordination mode.
In order to further standardize the problems of setting, using and managing the road traffic signal lamps, the state at present develops standards and technical specifications such as 'road traffic signal lamp setting and installation specifications' (GB 14886-2016) and 'road traffic signal control machine' (GB 25280-2016). The standards and technical specifications mainly focus on the functional design of road traffic signal equipment, and specific requirements are not explicitly given on the aspect of electrical safety design, so that the installation requirements of equipment cases are continuously used in construction and maintenance, and the safety factor of design protection requirements is low. And the power utilization safety coefficient is continuously reduced due to the problems of cable aging and the like. In addition, the outfield system lacks reliable and effective power utilization protection equipment, and the power utilization safety is continuously and seriously threatened.
Specifically, for example, the document with publication number CN104167104A proposes a self-adaptive traffic adaptive countdown display and a control method thereof, in which a countdown module is respectively connected to a wireless module, a network module, power carrier communication, and RS485 communication, and this mode seems to be powerful and is really unreasonable, if equipped with wireless devices requiring purchasing, the cost is high, and there is a wireless interference problem; a special communication line needs to be laid for the network module and the RS485, so that the cost and the complexity of construction and maintenance are increased; the power carrier communication also needs to adopt a special chip, the transmission signal quality is poor, the single width is narrow, and data cannot be transmitted when the line is stopped and maintained. Therefore, the countdown display cannot integrate multiple communication modes from the aspect of cost, and unnecessary high cost is caused.
Generally, a TST319023 cable is adopted in an existing fixed traffic signal lamp, a transmission cable needs to be separately provided for signal transmission, and a signal cable and a power supply cable are separately arranged, so that the cost is high in general terms, which is divided into a construction cost and a maintenance cost.
Disclosure of Invention
The invention comprises two aspects, on one hand, the invention discloses a specific safety signal lamp control system, and realizes a new safety signal lamp control system, on the other hand, the invention discloses a safety signal lamp control method used by the safety signal lamp control system, and the disclosed safety signal lamp control system can be reasonably designed according to the disclosed method.
The technical scheme of the invention is as follows: a safety signal lamp control system is characterized in that: the system comprises a signal host, a transformer connected to the signal host and a safety signal lamp connected with the transformer;
the input end of the transformer is more than or equal to 220AC, and the output end of the transformer is 18-36AC output;
a pulse countdown signal generator in the signal host sends out a preset pulse control signal to be output to a single-tube common-emitter amplifier, then the pulse control signal is connected to a bidirectional thyristor circuit through a photoelectric combiner, the output end face of the bidirectional thyristor circuit is coupled to 18-36AC output, the 18-36AC output is connected with a rectifying circuit in a safety signal lamp, and a control circuit with pulse detection and the rectifying circuit in the safety signal lamp are also connected in parallel to the 18-36AC output;
the rectification circuit supplies power to the safety signal lamp;
the control circuit controls the safety signal lamp according to the detected pulse signal.
Preferably, the pulse countdown signal generator is a Spartan-6 FPGA module.
Further, the width of the pulse control signal is between 5 and 1000 mu s.
Further, the pulse control signal is a PWM control signal.
In addition, the control circuit comprises an STC89C52RC chip for detecting the pulse signal.
Preferably, the photoelectric combiner is a TLP 521-1.
It should be noted that, in the technical scheme, the single-tube cascode amplifier is used for signal amplification; the photoelectric combiner is used for reducing signal crosstalk and distortion; the bidirectional thyristor circuit plays a role in alternating current voltage regulation.
It should be noted that, since the AC frequency of the utility power is 50HZ, the AC frequency of 18-36AC output by the transformer is also 50HZ, and for convenience of subsequent detection of the pulse signal, the frequency of the pulse signal is preferably greater than 500HZ, which is convenient for detection of the pulse signal, and the pulse signal designed based on the FPGA mainly utilizes the principle that the frequency divider inside the FPGA divides the frequency of the clock signal to obtain the pulse signal. The design needs an FPGA working clock to meet the design requirement, and as the pulse signal designed by the invention is adjustable from 5 to 1000 mu s, a spark-6 series PFGA is selected, the main clock of the FPGA can reach 750MHz, and simultaneously an IO port can output the pulse signal of a 2ns jump edge, and the FPGA has low price and can be used for realizing the accurate pulse width modulation between 5 and 1000 mu s.
In another aspect of the present invention, a method for controlling a safety signal lamp is disclosed, which is characterized in that: the method comprises the following steps:
step 1: the input end of the transformer is input voltage which is more than or equal to 220AC, and 18-36AC is output to a common cable for supplying power for the work of a safety signal lamp;
step 2: supplying power to a signal host by a transformer, wherein the signal host is used for modulating a control signal which does not interfere with the 18-36AC output of the transformer on the shared cable, and the control signal is connected to the shared cable;
and step 3: the safety signal lamp is internally provided with a control circuit for detecting a control signal, and the control circuit is used for controlling the safety signal lamp.
Specifically, the generated interference includes one or a combination of two or more of co-channel interference, intermodulation interference, spurious interference, adjacent channel interference, intersymbol interference and multipath interference.
The beneficial effect of this patent lies in: the 18-36AC voltage is used, and even if the problems of electric leakage of the equipment case, cable aging and the like occur, the power utilization safety coefficient is continuously reduced, and the safety of personnel can not be endangered. And secondly, the 18-36AC voltage is supplied to the cable, so that the Joule heating effect is reduced, the power is saved to a certain extent, and the durable use degree of the cable is improved. Thirdly, original power supply cable and signal cable have been optimized to this patent, share power supply cable and signal cable as a cable, greatly reduced construction cost and maintenance cost, take an intersection as an example, reducible construction cost and subsequent maintenance cost of at least 10 ten thousand yuan. Fourthly, the subsequent mobile signal lamp is quite convenient to use.
Drawings
FIG. 1 is a block diagram of a system.
Reference numerals: the device comprises a transformer 1, a red light power supply and signal cable 11, a counting yellow light power supply and signal cable 12, a green light power supply and signal cable 13, a ground wire 14, a live wire 15 and a zero line 16;
the system comprises a signal host 2, a red light signal line 21, a yellow light signal line 22, a green light signal line 23, a TLP521-1 photoelectric combiner 24, a Spartan-6 FPGA module 25, a bidirectional thyristor circuit 26 and a single-tube cascode amplifier 27;
the safety signal lamp 3, the red light 31, the yellow light 32, the green light 33, the control circuit 34, the rectifying circuit 35 and the STC89C52RC chip 36.
Detailed Description
Example 1
In the embodiment, a transformer 1 transforms high voltage of a live wire 15 and a zero line 16 to safe voltage to output a red light power supply and signal cable 11, a counting yellow light power supply and signal cable 12 and a green light power supply and signal cable 13, a voltage stabilizer is arranged in the transformer 1, and the transformer 1 also supplies alternating current to a signal host machine 2; the same side of the red light power supply and signal cable 11, the counting yellow light power supply and signal cable 12 and the green light power supply and signal cable 13 is connected with the transformer 1 and the signal host machine 2, the other side of the red light power supply and signal cable is connected with the safety signal lamp 3, however, the side of the safety signal lamp 3 is connected with the rectifying circuit 35 to supply power for the safety signal lamp 3, and is also connected with the STC89C52RC chip 36 to detect the pulse signal, and the pulse signal is converted into the control signal for the red light 31, the yellow light 32 and the green light 33.
The safety signal lamp 3 of the embodiment is a double 8 countdown lampwick of an alternating current 36v pedestrian lamp, and the yellow lamp 32 has a timing function.
Specifically, the signal host 2 is provided with a red light signal line 21, a yellow light signal line 22, a green light signal line 23, a TLP521-1 photoelectric combiner 24 and a Spartan-6 FPGA module 25, an alternating current voltage supplied from the transformer 1 is firstly subjected to pulse bandwidth modulation by the Spartan-6 FPGA module 25, then passes through a monotube common emitter amplifier 27 and then is connected to a bidirectional thyristor circuit 26 through the TLP521-1 photoelectric combiner 24, and an output end of the bidirectional thyristor circuit 26 is coupled to the red light power supply and signal cable 11, the count yellow light power supply and signal cable 12 and the green light power supply and signal cable 13 through the red light signal line 21, the yellow light signal line 22 and the green light signal line 23.
It is understood that the red light power supply and signal cable 11, the yellow light power supply and signal cable 12, and the green light power supply and signal cable 13 in the embodiment are common cables described in the safety signal light control method.
In the embodiment of Spartan-6 FPGA module 25, the ModelSim partial excitation code in the Xilinx ISE development environment is as follows:
reg c1k200 m// clock
reg mcu _ cs _ n// control word select enable
reg mcu _ wr _ n// control word write enable
reg mcu _ rd _ n// control word read enable
reg [3:0] mcu _ addr// register address
wire [7:0] mcu _ data// control word
wire div _ data// output pulse signal
parameter PEIOD=(1000.0/200);
always #(PEIOD/2) c1k50m=~c1k50m;
mcu _ wr (4'h9,8' h 1);/make register set
mcu _ wr (4'h0,8'd 250)// write repetition frequency control word
mcu_ wr(4'h1,8'd0);
mcu_ wr(4'h2,8'd0);
mcu_ wr(4'h3,8'd0);
mcu _ wr (4'h4,8'd 1);/write pulse width control word B0
mcu_ wr(4'h5,8'd0);
mcu_ wr(4'h6,8'd0);
mcu_ wr(4'h7,8'd0);
mcu _ wr (4'h8,8'd 0);/write pulse width control word B1
mcu _ wr (4'h9,8' h 0);/register set done
This patent significantly reduces construction cost and maintenance cost to it is fairly convenient to provide for subsequent removal signal lamp. When a new traffic signal lamp is built, the building design can be completely carried out on the original power supply cable, and the laying of signal cables and the design of a signal system are not required to be continuously increased.
It should be noted that, as one of ordinary skill in the art can appreciate, all or part of the processes in the methods of the above embodiments may also be implemented by a computer program that can be stored in a computer-readable storage medium and that, when executed, can include the processes of the embodiments of the methods described above. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a Random Access Memory (RAM), or the like.
It should be noted that those skilled in the art can appreciate that the method of the above embodiment may be implemented not only by the PWM control signal to control the traffic signal, but also by the carrier or carrier frequency phase being modulated to transmit a signal for adjusting the traffic safety signal.
The above disclosure is only for the purpose of illustrating the preferred embodiments of the present invention, and it is therefore to be understood that the invention is not limited by the scope of the appended claims.
Claims (9)
1. A safety signal lamp control system is characterized in that: the system comprises a signal host, a transformer connected to the signal host and a safety signal lamp connected with the transformer;
the input end of the transformer is more than or equal to 220AC, and the output end of the transformer is 18-36AC output;
a pulse countdown signal generator in the signal host sends out a preset pulse control signal to be output to a single-tube common-emitter amplifier, and then is connected to a bidirectional thyristor circuit through a photoelectric combiner, the output end of the bidirectional thyristor circuit is coupled to 18-36AC output, the 36AC output is connected with a rectifying circuit in a safety signal lamp, and the 36AC output is also connected in parallel with a control circuit with pulse detection and the rectifying circuit in the safety signal lamp;
the rectification circuit supplies power to the safety signal lamp;
the control circuit controls the safety signal lamp according to the detected pulse signal.
2. A safety signal lamp control system as claimed in claim 1, wherein: the pulse countdown signal generator is a spark tan-6 FPGA module.
3. A safety signal lamp control system according to claim 1 or 2, wherein: the width of the pulse control signal is between 5 and 1000 mu s.
4. A safety signal lamp control system according to claim 1 or 2, wherein: the pulse control signal is a PWM control signal.
5. A safety signal lamp control system as claimed in claim 1, wherein: the control circuit comprises an STC89C52RC chip for detecting the pulse signal.
6. A safety signal lamp control system as claimed in claim 1, wherein: the photoelectric combiner is of the type TLP 521-1.
7. A safety signal lamp control system as claimed in claim 1, wherein: the AC output ends of the transformers 18 to 36 are multiple.
8. A safety signal lamp control method is characterized in that: the method comprises the following steps:
step 1: the input end of the transformer is input voltage which is more than or equal to 220AC, and 18-36AC is output to a common cable for supplying power for the work of a safety signal lamp;
step 2: supplying power to a signal host by a transformer, wherein the signal host is used for modulating a control signal which does not interfere with the 18-36AC output of the transformer on the shared cable, and the control signal is connected to the shared cable;
and step 3: the safety signal lamp is internally provided with a control circuit for detecting a control signal, and the control circuit is used for controlling the safety signal lamp.
9. The method of claim 8, wherein: the generated interference comprises one interference or a combination of two or more than two interferences of same frequency interference, intermodulation interference, stray interference, adjacent channel interference, intersymbol interference and multipath interference.
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| CN202110515420.3A CN113129619B (en) | 2021-05-12 | 2021-05-12 | Safety signal lamp control system and method |
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| CN202110515420.3A CN113129619B (en) | 2021-05-12 | 2021-05-12 | Safety signal lamp control system and method |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113744545A (en) * | 2021-08-26 | 2021-12-03 | 广东华络电子科技有限公司 | Signal control circuit and intelligent traffic signal lamp safety power utilization system with same |
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| US5309155A (en) * | 1992-07-07 | 1994-05-03 | Industrial Technology Research Institute | Control apparatus for network traffic light |
| US20060028357A1 (en) * | 2004-08-05 | 2006-02-09 | Beckwith Leslie A | 2-Wire push button station control system for a traffic light controlled intersection |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113744545B (en) * | 2021-08-26 | 2023-11-03 | 广东华络电子科技有限公司 | Signal control circuit and intelligent traffic signal lamp safety power utilization system with same |
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