CN113129619B - Safety signal lamp control system and method - Google Patents
Safety signal lamp control system and method Download PDFInfo
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- CN113129619B CN113129619B CN202110515420.3A CN202110515420A CN113129619B CN 113129619 B CN113129619 B CN 113129619B CN 202110515420 A CN202110515420 A CN 202110515420A CN 113129619 B CN113129619 B CN 113129619B
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- 238000010276 construction Methods 0.000 abstract description 10
- 238000012423 maintenance Methods 0.000 abstract description 9
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Classifications
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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, wherein 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 equipment cabinet leakage, cable aging and the like occur, the electricity safety coefficient is continuously reduced, and the situation of personnel safety is not endangered. Secondly, the safety voltage supplies power on 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, this patent has optimized original power supply cable and signal cable, uses power supply cable and signal cable as a cable, and construction cost and maintenance cost have significantly reduced to an intersection is the example, reducible at least 10000 yuan' construction cost and subsequent maintenance cost. Fourth, it provides convenience for follow-up mobile signal lamp.
Description
Technical Field
The invention relates to a control system, in particular to the field of traffic signal lamps, and belongs to the technical field of intelligent traffic signal lamp control.
Background
Along with the continuous expansion of urban scale and the increase of roads and motor vehicles, the technological level of road traffic management is also continuously improved. Wherein, the traffic signal controller (hereinafter referred to as a signaler) is used as an important device for controlling the traffic signal of the intersection, and the product type is subjected to fixed timing, multi-period timing, induction type and centralized coordination type evolution.
The national standards and technical specifications of road traffic signal lamp setting and mounting Specification (GB 14886-2016) and road traffic signal controller (GB 25280-2016) are issued for further standardization of road traffic signal lamp setting, use and management. The standards and the technical specifications mainly focus on the functional design of road traffic signal equipment, and specific requirements are not explicitly given to the aspect of electric safety design, so that the equipment case installation requirements are always used in construction and maintenance, and the safety factor of the design protection requirements is low. And the problems of cable aging and the like, so that the electric safety coefficient is continuously reduced. In addition, the outfield system lacks reliable and effective electricity protection equipment and also continuously threatens the electricity safety seriously.
Specifically, for example, a document with publication number CN104167104a proposes a self-adaptive traffic self-adaptive countdown display and a control method thereof, wherein a countdown module is respectively connected with a wireless module, a network module, power carrier communication and RS485 communication, and the mode looks powerful, is in fact unprecedented, and has the problems of high cost and wireless interference if a wireless device needing to be purchased is equipped; the network module and the RS485 are required to be paved with special communication lines, 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 the data can not be transmitted when the line is overhauled when the line is stopped. So from a cost perspective, a countdown display is not likely to integrate multiple modes of communication, resulting in an unnecessarily high cost.
Generally, a conventional fixed traffic signal adopts a TST319023 cable, so that a transmission cable is required to be separately provided for signal transmission, and a signal cable and a power supply cable are separately provided, so that the cost is high in general, the cost is high and divided into a construction cost and a maintenance cost, and the construction cost is high because the power supply cable and the signal cable are systems of separate components during construction, but when any one of the system where the power supply cable is located and the system where the signal cable is located is problematic, a problem occurs in a display portion of the final traffic signal, and the maintenance cost is relatively high from the aspect of probability of occurrence of the problem.
Disclosure of Invention
The invention comprises two aspects, on one hand, a specific safety signal lamp control system is disclosed, a new safety signal lamp control system is realized, on the other hand, a safety signal lamp control method used by the safety signal lamp control system is disclosed, 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, 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 220AC or more, and the output end of the transformer is 18-36AC output;
the pulse counting-down signal generator in the signal host sends out a preset pulse control signal to the single-tube common-emission amplifier, and then is connected to the bidirectional thyristor circuit through the photoelectric combiner, the output end surface of the bidirectional thyristor circuit is coupled to 18-36AC output, the 18-36AC output is connected with the rectifying circuit in the safety signal lamp, and the 18-36AC output is also connected with the control circuit with pulse detection in the safety signal lamp and the rectifying circuit in parallel;
the rectification circuit supplies power for 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 pulse control signal width is between 5 and 1000 mu s.
Further, the pulse control signal is a PWM control signal.
The control circuit comprises an STC89C52RC chip for detecting the pulse signal.
Preferably, the photovoltaic combiner is of the type TLP521-1.
It should be noted that, in the present technical solution, the single tube co-emission 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 in order to facilitate the subsequent pulse signal detection, the frequency of the pulse signal is preferably greater than 500HZ, so that the pulse signal detection is facilitated, and the pulse signal designed based on the FPGA mainly uses the principle that the frequency divider in the FPGA divides the clock signal to obtain the pulse signal. The design needs an FPGA working clock to meet the design requirement, and because the pulse signal designed by the FPGA working clock is adjustable from 5-1000 mu s, the FPGA working clock selects Spartan-6 series PFGA, the main clock of the FPGA can reach 750MHz, and meanwhile, an IO port can output a pulse signal with a 2ns jump edge, and meanwhile, the FPGA working clock is low in cost and can be used for realizing accurate pulse width modulation between 5 and 1000 mu s.
Another aspect of the present invention discloses a method for controlling a safety signal lamp, 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, 18-36AC is output to a common cable for working power supply of the 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 transformer output 18-36AC on a common cable, and the control signal is connected to the common cable;
step 3: the safety signal lamp is internally provided with a control circuit for detecting control signals, 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 common-frequency 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 equipment cabinet leakage, cable aging and the like occur, the electricity safety coefficient is continuously reduced, and the situation of personnel safety is not endangered. Secondly, 18-36AC voltage supplies power on 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, this patent has optimized original power supply cable and signal cable, uses power supply cable and signal cable as a cable, and construction cost and maintenance cost have significantly reduced to an intersection is the example, reducible at least 10 ten thousand yuan's construction cost and subsequent maintenance cost. Fourth, it provides convenience for follow-up mobile signal lamp.
Drawings
Fig. 1 is a block diagram of a system.
Reference numerals: the transformer 1, the red light power supply and signal cable 11, the counting yellow light power supply and signal cable 12, the green light power supply and signal cable 13, the ground wire 14, the live wire 15 and the zero wire 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 co-emission amplifier 27;
the safety signal lamp 3, the red lamp 31, the yellow lamp 32, the green lamp 33, the control circuit 34, the rectifying circuit 35 and the STC89C52RC chip 36.
Detailed Description
Example 1
In the embodiment, high voltage electricity of a live wire 15 and a zero wire 16 is transformed to a safe voltage through a transformer 1, and then a red light power supply and signal cable 11, a yellow light counting power supply and signal cable 12 and a green light power supply and signal cable 13 are output, wherein a voltage stabilizer is arranged in the transformer 1, and meanwhile, the transformer 1 also supplies alternating current power to a signal host 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 2, and the other side 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 to the safety signal lamp 3, is connected with the STC89C52RC chip 36 to detect pulse signals, and converts the pulse signals into control signals for the red light 31, the yellow light 32 and the green light 33.
The safety signal lamp 3 of the embodiment is an alternating current 36v pedestrian lamp double 8 countdown lamp wick, and the yellow lamp 32 has a timing function.
Specifically, a 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, alternating voltage supplied by a transformer 1 is subjected to pulse bandwidth modulation in the Spartan-6 FPGA module 25, passes through a single tube co-emission amplifier 27, then passes through the TLP521-1 photoelectric combiner 24 and is connected to a bidirectional thyristor circuit 26, and the output end of the bidirectional thyristor circuit 26 is coupled to 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 through the red light signal line 21, the yellow light signal line 22 and the green light signal line 23.
It will be appreciated that the red light power and signal cable 11, the counter yellow light power and signal cable 12, the green light power and signal cable 13 described in the embodiments, namely the common cable described in the safety signal control method.
In an embodiment, spartan-6 FPGA module 25, modelSim partial stimulus code in the Xilinx ISE development environment is as follows:
reg c1k200m;// clock
reg mcu_cs_n;// control chip 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);// 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 up complete
This patent has significantly reduced construction cost and maintenance cost to for follow-up removal signal lamp provides fairly facility. The novel traffic signal lamp can be completely built and designed on the conventional power supply cable when a novel traffic signal lamp is built, 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, it will be understood by those skilled in the art that all or part of the procedures in the methods of the above embodiments may be implemented by a computer program to instruct related hardware, where the program may be stored in a computer readable storage medium, and the program may include the procedures of the embodiments of the methods when executed. The storage medium may be a magnetic disk, an optical disk, a Read-Only Memory (ROM), a random access Memory (Random Access Memory, RAM), or the like.
It should be noted that, it will be understood by those skilled in the art that the method of implementing the above embodiment may implement control of the traffic signal not only by using PWM control signals, but also by modulating carrier waves or carrier frequency phases to transmit signals for adjusting the traffic safety signal.
The foregoing disclosure is illustrative of the present invention and is not to be construed as limiting the scope of the invention, which is defined by the appended claims.
Claims (6)
1. A safety signal lamp control system, 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 220AC or more, and the output end of the transformer is 18-36AC output;
the pulse countdown signal generator in the signal host sends out a preset pulse control signal to the single-tube common-emission amplifier, and then is connected to the bidirectional thyristor circuit through the photoelectric combiner, the output end of the bidirectional thyristor circuit is coupled to 18-36AC output, the 36AC output is connected with the rectifying circuit in the safety signal lamp, and the 36AC output is also connected with the control circuit with pulse detection in the safety signal lamp and the rectifying circuit in parallel;
the rectification circuit supplies power for the safety signal lamp;
the control circuit controls the safety signal lamp according to the detected pulse signal;
the high voltage of the live wire and the zero wire is transformed to safe voltage through a transformer, the safe voltage is output to a red light power supply and signal cable, a yellow light power supply and signal cable and a green light power supply and signal cable, a voltage stabilizer is arranged in the transformer, and the transformer supplies power to a signal host in an alternating current manner; wherein, the same side of the red light power supply and signal cable, the counting yellow light power supply and signal cable and the green light power supply and signal cable is connected with the transformer and the signal host, the other side is connected with a safety signal lamp;
the signal host is provided with a red light signal wire, a yellow light signal wire, a green light signal wire, a photoelectric combiner and a pulse countdown signal generator, wherein alternating voltage provided by a transformer is firstly subjected to pulse bandwidth modulation in the pulse countdown signal generator and then is connected to a bidirectional thyristor circuit through the photoelectric combiner after passing through a single-tube common-emission amplifier, and the output end of the bidirectional thyristor circuit is coupled to a red light power supply and signal cable, a counting yellow light power supply and signal cable and a green light power supply and signal cable through the red light signal wire, the yellow light signal wire and the green light signal wire;
the safety signal lamp control method based on the safety signal lamp control system comprises the following steps:
step 1: the input end of the transformer is input voltage which is more than or equal to 220AC, 18-36AC is output to a common cable for working power supply of the 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 transformer output 18-36AC on a common cable, and the control signal is connected to the common cable;
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;
the interference comprises one or a combination of two or more of common-frequency interference, intermodulation interference, stray interference, adjacent channel interference, intersymbol interference and multipath interference;
the pulse control signal width is between 5 and 1000 mu s.
2. A safety signal control system as claimed in claim 1, wherein: the pulse countdown signal generator is a Spartan-6 FPGA module.
3. A safety signal control system according to claim 1 or 2, characterized in that: the pulse control signal is a PWM control signal.
4. A safety signal control system as claimed in claim 1, wherein: the control circuit comprises an STC89C52RC chip for detecting the pulse signal.
5. A safety signal control system as claimed in claim 1, wherein: the photo-electric combiner is of the type TLP521-1.
6. A safety signal control system as claimed in claim 1, wherein: the transformers 18-36 have a plurality of AC outputs.
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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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| 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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| US5309155A (en) * | 1992-07-07 | 1994-05-03 | Industrial Technology Research Institute | Control apparatus for network traffic light |
| WO2007087756A1 (en) * | 2006-02-05 | 2007-08-09 | Hai Wang | A capacitor-switched power supply with low power loss standby function |
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