CN203849868U - Wireless traffic signal control system - Google Patents
Wireless traffic signal control system Download PDFInfo
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- CN203849868U CN203849868U CN201420248880.XU CN201420248880U CN203849868U CN 203849868 U CN203849868 U CN 203849868U CN 201420248880 U CN201420248880 U CN 201420248880U CN 203849868 U CN203849868 U CN 203849868U
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Abstract
The utility model discloses a wireless traffic signal control system, which comprises a radio broadcast receiving circuit used for receiving signals of a public radio broadcast station, an automatic frequency tuning and decoding circuit used for carrying out tuning and decoding on the received signals, a signal demodulating and amplifying circuit used for carrying out demodulating and amplifying on the signals and a traffic signal display and driving circuit used for controlling signal output, wherein the output end of the radio broadcast receiving circuit is connected with the input end of the automatic frequency tuning and decoding circuit; the output end of the automatic frequency tuning and decoding circuit is connected with the input end of the signal demodulating and amplifying circuit; the output end of the signal demodulating and amplifying circuit is connected with the input end of the traffic signal display and driving circuit; and the output end of the traffic signal display and driving circuit is connected with a loudspeaker and an indicating lamp. According to the wireless traffic signal control system, broadcast signals of various frequencies widely sent by worldwide public radio stations are used, the hourly chime function of radio broadcast signals is used for acquiring hourly chime signals, and the function of accurate traffic signal lamp control can be realized.
Description
Technical field
The utility model relates to the control system in traffic signals control technology field, particularly a kind of wireless traffic signal.
Background technology
Time reference signal is the most basic requirement of traffic signals control function, current traffic signals control product is not having under the condition in diverse network support or other wired mode control source, work very reliably if required, often need accurate correct time control as signal source, traditional mode often adopts GPS, Big Dipper satellite signal etc. to carry out accurate time signal as time service instrument, the time signal of utilizing the transmitting of non-free radio specialty time signal platform or use high-precision electronic elapsed time clock and exports.
If adopt the time service instruments such as GPS, big-dipper satellite, certainly will cause the high cost of equipment set, moreover heavy snow, heavy rain, thick fog, the natural conditions such as block and can have impact to receiving satellite signal, easily cause the loss of short-term satellite-signal, cause the working time confusion of traffic control, can cause serious consequence, satellite signal receiving system cost is more expensive simultaneously.
If adopt the time signal of electronic clock circuit as traffic control system, any electric time-keeping clock all can have accumulated error, when these electronic timer cumulative errors reach positive and negative when more than 0.1 second, can have a strong impact on the normal work of whole traffic control system, even can cause larger traffic hazard, so electronic clock is not suitable for long-term use.
If while adopting the time signal of non-free radio time signal platform transmitting to originate use as the time of traffic control product, first must be to the cost of use of the owner of radio specialty time signal transmitting station or operator's payment great number, moreover this radio specialty time signal transmitting station radio coverage is limited, and country variant adopts the radiation pattern of different systems, its frequency, power, coverage, charge method are all not quite similar, and are unfavorable for the widespread use of traffic signals control product socialization.Taking Chinese Shangqiu broadcasting station of time signal as example, this with 24 hours every days continuously with four kinds of frequency (2.5M, 5M, 10M, 15M, ensure 3 kinds of frequencies simultaneously) replace broadcast standard time, standard-frequency signal, covering radius exceedes 3000 kilometers, and time service precision is millisecond (signa) magnitude; The high precision long wave time frequency signal that long-wave time service platform (BPL) timing every day broadcast carrier frequency is 100KHz, ground wave operating distance 1000-2000 kilometer, it earthwave combination, can cover national most of land and offshore sea waters, and time service precision is microsecond (microsecond) magnitude; This radio time signal is non-public free usability resource, adopts Paid Use System.Other countries of the world and area are similar to management major part and China of professional chronometer time time service resource simultaneously, all that such time signal resource is taked to paid utilization, moreover due to every country and area use time service radio transmission frequencies all differ to, affected by radio transmit power etc. and also have certain signal dead angle, if adopt the traffic control equipment of this time service mode, be difficult to as every country and the regional universal product.It is time service center that there is different frequency in country variant and area, if while adopting the signal that receives this time service center, countries and regions, first this time signal is centered by the time service transmitting station of these countries and regions, at the effectively acknowledge(ment) signal of certain kilometer radiation scope with transmitting station radius, moreover this signal is not transmitting in real time in 24 hours, and its emissive power can not cover the country one belongs to and regional territory area completely, to ensureing that the traffic control mode of normal work in 24 hours is obviously improper.
Therefore the prior art of these time signal outputs cannot adapt to the widely used traffic signal control system application of socialization at present, also certainly leads to certain impact and restriction for the development of traffic signal control system.
Utility model content
The utility model technical issues that need to address are to provide a kind of system of utilizing free time signal output resource to carry out traffic signals control, are ensureing, on the basis of traffic display system reliably working, to improve its versatility.
For solving the problems of the technologies described above, technical solution adopted in the utility model is as follows.
Traffic signal wireless control system, comprise the radio broadcasting receiving circuit for receiving public radio broadcast station signal, for the frequency hands-off tuning decoding circuit that the signal receiving is carried out to tuning decoding, signal is carried out to demodulation amplifying signal demodulation amplifying circuit and the traffic signals display driver circuit for control signal output, the input end of the output terminal rate of connections hands-off tuning decoding circuit of described radio broadcasting receiving circuit, the output terminal of frequency hands-off tuning decoding circuit connects the input end of signal demodulation amplifying circuit, the output terminal of signal demodulation amplifying circuit connects the input end of traffic signals display driver circuit, the output terminal of traffic signals display driver circuit connects loudspeaker and pilot lamp.
The concrete structure of radio broadcasting receiving circuit described in the utility model is: described radio broadcasting receiving circuit comprises the antenna reception circuit, bandpass filter, oscillator, wireless receiving circuit and the high-frequency amplifier circuit that are connected in series successively, the input end of the output terminal rate of connections hands-off tuning decoding circuit of high-frequency amplifier circuit.
The concrete structure of frequency hands-off tuning decoding circuit described in the utility model is: described frequency hands-off tuning decoding circuit comprises frequency selection network, frequency mixer, decoding unit, phaselocked loop, Automatic Frequency Control circuit, local oscillator and intermediate frequency amplifier circuit, the input end of described frequency selection network connects the output terminal of radio broadcasting receiving circuit medium-high frequency amplifying circuit, the output terminal of frequency selection network is connected with the input end of frequency mixer and decoding unit respectively, the output terminal of decoding unit connects the input end of phaselocked loop, the input end of the output terminal rate of connections automatic control circuit of phaselocked loop, the input end of Automatic Frequency Control circuit also connects the output terminal of local oscillator, the output terminal of Automatic Frequency Control circuit connects the input end of frequency mixer, the output terminal of frequency mixer connects the input end of intermediate frequency amplifier circuit.
The concrete structure of signal demodulation amplifying circuit described in the utility model is: described signal demodulation amplifying circuit comprises frequency-discriminating circuit, detecting circuit, wave filter and low-frequency amplifier circuit, the output terminal of decoding circuit in the input end rate of connections hands-off tuning decoding circuit of described frequency-discriminating circuit, the output terminal of frequency-discriminating circuit connects the input end of detecting circuit, and the output terminal of detecting circuit connects the input end of low-frequency amplifier circuit through wave filter.
Described traffic signals display driver circuit concrete structure of the present utility model is: described traffic signals display driver circuit comprises triode DC drive circuit, voice drive circuit and display driver circuit, the input end of described triode DC drive circuit connects the output terminal of signal demodulation amplifying circuit medium and low frequency amplifying circuit, the output terminal of triode DC drive circuit is connected with the input end of voice drive circuit and display driver circuit respectively, the output terminal of voice drive circuit connects hummer, the output terminal of display driver circuit connects respectively traffic signal indicating lamp, pedestrian crossing indicating light and count-down device.
Owing to having adopted above technical scheme, the obtained technical progress of the utility model is as follows.
The utility model utilization extensively all over the world public wireless radio station send the broadcast singal of various frequencies, the integral point time reporting function that utilizes these radio signals all to have, obtain integral point time signal, realize the function that traffic lights are accurately controlled.The utility model can be at the integral point time signal of the more stable public radio broadcasting station resource of country variant and regional automatic acquisition locality, the time of simultaneously utilizing the utility model can realize traffic signals and other traffic control products is controlled, in the time that received signal of radio set meets with that the wireless station of working goes off the air or weak output signal can not support the situation of this system works, the utility model can be seamless rapidly automatic search and be converted to other public radio broadcast station signals that local signal is stronger, so the utility model can ensure the seamless uninterrupted timing of 24 hours of radio broadcasting integral point time signal and read, realize the object of whole traffic display system reliably working.
Brief description of the drawings
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is the circuit block diagram of radio broadcasting receiving circuit described in the utility model;
Fig. 3 is the circuit block diagram of frequency hands-off tuning decoding circuit described in the utility model;
Fig. 4 is the circuit block diagram of Signal Regulation amplifying circuit described in the utility model;
Fig. 5 is the circuit block diagram of traffic signals display driver circuit described in the utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments, the utility model is further elaborated.
A kind of traffic signal wireless control system, its structured flowchart as shown in Figure 1, comprise radio broadcasting receiving circuit, frequency hands-off tuning decoding circuit, signal demodulation amplifying circuit and traffic signals display driver circuit, the input end of the output terminal rate of connections hands-off tuning decoding circuit of radio broadcasting receiving circuit, the output terminal of frequency hands-off tuning decoding circuit connects the input end of signal demodulation amplifying circuit, the output terminal of signal demodulation amplifying circuit connects the input end of traffic signals display driver circuit, the output terminal of traffic signals display driver circuit connects loudspeaker and pilot lamp.
Wherein, radio broadcasting receiving circuit is used for receiving public radio broadcast station signal, and its structured flowchart as shown in Figure 2.Comprise the antenna reception circuit, bandpass filter, oscillator, wireless receiving circuit and the high-frequency amplifier circuit that are connected in series successively, the input end of the output terminal rate of connections hands-off tuning decoding circuit of high-frequency amplifier circuit.
Frequency hands-off tuning decoding circuit is for carrying out tuning decoding to the signal receiving, and its structured flowchart as shown in Figure 3.Comprise frequency selection network, frequency mixer, decoding unit, phaselocked loop, Automatic Frequency Control circuit, local oscillator and intermediate frequency amplifier circuit, the input end of described frequency selection network connects the output terminal of radio broadcasting receiving circuit medium-high frequency amplifying circuit, the output terminal of frequency selection network is connected with the input end of frequency mixer and decoding unit respectively, the output terminal of decoding unit connects the input end of phaselocked loop, the input end of the output terminal rate of connections automatic control circuit of phaselocked loop, the input end of Automatic Frequency Control circuit also connects the output terminal of local oscillator, the output terminal of Automatic Frequency Control circuit connects the input end of frequency mixer, the output terminal of frequency mixer connects the input end of intermediate frequency amplifier circuit.
Signal demodulation amplifying circuit is for carrying out demodulation amplification to signal, and its structured flowchart as shown in Figure 4.Comprise frequency-discriminating circuit, detecting circuit, wave filter and low-frequency amplifier circuit, the output terminal of decoding circuit in the input end rate of connections hands-off tuning decoding circuit of described frequency-discriminating circuit, the output terminal of frequency-discriminating circuit connects the input end of detecting circuit, and the output terminal of detecting circuit connects the input end of low-frequency amplifier circuit through wave filter.
Traffic signals display driver circuit is for control signal output, and its structured flowchart as shown in Figure 5.Comprise triode DC drive circuit, voice drive circuit and display driver circuit, the input end of described triode DC drive circuit connects the output terminal of signal demodulation amplifying circuit medium and low frequency amplifying circuit, the output terminal of triode DC drive circuit is connected with the input end of voice drive circuit and display driver circuit respectively, the output terminal of voice drive circuit connects hummer, and the output terminal of display driver circuit connects respectively traffic signal indicating lamp, pedestrian crossing indicating light and count-down device.
The course of work of the present utility model is as described below:
Antenna reception circuit is sent the public radio broadcast station signal of reception into bandpass filter and is carried out filtering processing, then be coupled with oscillator, after radio broadcasting radio signals is coupled, send into wireless receiving circuit and process, and then flow to frequency hands-off tuning decoding circuit through High frequency amplification.In the present embodiment, the main chip of wireless receiving circuit can adopt TA7358, and oscillator adopts wien-bridge oscillator.
Select the high-frequency signal of required channel through the radio broadcasting signal of High frequency amplification through frequency selection network, through High frequency amplification, frequency conversion, obtain intermediate-freuqncy signal, fix because of IF-FRE, be convenient to use FILTER TO CONTROL frequency band, be easy to improve selectivity.Because working under lower frequency, even if it is high to gain, can feed back to height yet and put level and cause self-excitation again.The high-frequency signal of selecting through frequency selection network is sent into respectively frequency mixer and decoding unit; Decoding unit is processed high-frequency signal, and the integer frequency bias, the decimal frequency bias that obtain feed back in described phase-locked loop circuit, proofreaies and correct, and the signal after correction is sent into after Automatic Frequency Control circuit regulates again and sent into frequency mixer.Automatic Frequency Control circuit can be selected, automatically regulate frequency by changing voltage, and realizing frequency can automatic drift, the sensitivity that has greatly improved receiver.Process in frequency mixer from the high-frequency signal of frequency selection network output and the signal after Automatic Frequency Control circuit conditioning, frequency mixer is exported fixing intermediate-freuqncy signal, then is sent into intermediate frequency amplifier circuit and carry out sending into signal demodulation amplifying circuit after power amplification and process.
After intermediate-freuqncy signal entering signal demodulation amplifying circuit, first sending into frequency-discriminating circuit regulates the frequency width of signal, intermediate frequency composition by detecting circuit filtered signal obtains low frequency signal, sends into low-frequency amplifier circuit and amplify after filtering, then sends into traffic signals display driver circuit.Frequency-discriminating circuit can adopt linear amplitude wider, regulate be easy to linear discriminator.
Low frequency signal is sent into the triode DC drive circuit in traffic signals display driver circuit, is transformed into the signal for controlling sound and demonstration, removes respectively to control voice drive circuit and display driver circuit; Voice drive circuit receives signal rear drive loudspeaker and gives the alarm; Display driver circuit receives controls respectively corresponding traffic signal indicating lamp after signal and pedestrian crossing indicating light is lighted, and also can drive count-down device to carry out time showing simultaneously.
Claims (5)
1. traffic signal wireless control system, it is characterized in that: comprise the radio broadcasting receiving circuit for receiving public radio broadcast station signal, for the frequency hands-off tuning decoding circuit that the signal receiving is carried out to tuning decoding, signal is carried out to demodulation amplifying signal demodulation amplifying circuit and the traffic signals display driver circuit for control signal output, the input end of the output terminal rate of connections hands-off tuning decoding circuit of described radio broadcasting receiving circuit, the output terminal of frequency hands-off tuning decoding circuit connects the input end of signal demodulation amplifying circuit, the output terminal of signal demodulation amplifying circuit connects the input end of traffic signals display driver circuit, the output terminal of traffic signals display driver circuit connects loudspeaker and pilot lamp.
2. traffic signal wireless control system according to claim 1, it is characterized in that: described radio broadcasting receiving circuit comprises the antenna reception circuit, bandpass filter, oscillator, wireless receiving circuit and the high-frequency amplifier circuit that are connected in series successively the input end of the output terminal rate of connections hands-off tuning decoding circuit of high-frequency amplifier circuit.
3. traffic signal wireless control system according to claim 2, it is characterized in that: described frequency hands-off tuning decoding circuit comprises frequency selection network, frequency mixer, decoding unit, phaselocked loop, Automatic Frequency Control circuit, local oscillator and intermediate frequency amplifier circuit, the input end of described frequency selection network connects the output terminal of radio broadcasting receiving circuit medium-high frequency amplifying circuit, the output terminal of frequency selection network is connected with the input end of frequency mixer and decoding unit respectively, the output terminal of decoding unit connects the input end of phaselocked loop, the input end of the output terminal rate of connections automatic control circuit of phaselocked loop, the input end of Automatic Frequency Control circuit also connects the output terminal of local oscillator, the output terminal of Automatic Frequency Control circuit connects the input end of frequency mixer, the output terminal of frequency mixer connects the input end of intermediate frequency amplifier circuit.
4. traffic signal wireless control system according to claim 3, it is characterized in that: described signal demodulation amplifying circuit comprises frequency-discriminating circuit, detecting circuit, wave filter and low-frequency amplifier circuit, the output terminal of decoding circuit in the input end rate of connections hands-off tuning decoding circuit of described frequency-discriminating circuit, the output terminal of frequency-discriminating circuit connects the input end of detecting circuit, and the output terminal of detecting circuit connects the input end of low-frequency amplifier circuit through wave filter.
5. traffic signal wireless control system according to claim 4, it is characterized in that: described traffic signals display driver circuit comprises triode DC drive circuit, voice drive circuit and display driver circuit, the input end of described triode DC drive circuit connects the output terminal of signal demodulation amplifying circuit medium and low frequency amplifying circuit, the output terminal of triode DC drive circuit is connected with the input end of voice drive circuit and display driver circuit respectively, the output terminal of voice drive circuit connects hummer, the output terminal of display driver circuit connects respectively traffic signal indicating lamp, pedestrian crossing indicating light and count-down device.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420248880.XU CN203849868U (en) | 2014-05-16 | 2014-05-16 | Wireless traffic signal control system |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420248880.XU CN203849868U (en) | 2014-05-16 | 2014-05-16 | Wireless traffic signal control system |
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| CN203849868U true CN203849868U (en) | 2014-09-24 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420248880.XU Expired - Fee Related CN203849868U (en) | 2014-05-16 | 2014-05-16 | Wireless traffic signal control system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956056A (en) * | 2014-05-16 | 2014-07-30 | 保定维特瑞交通设施工程有限责任公司 | Wireless traffic signal control system |
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2014
- 2014-05-16 CN CN201420248880.XU patent/CN203849868U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103956056A (en) * | 2014-05-16 | 2014-07-30 | 保定维特瑞交通设施工程有限责任公司 | Wireless traffic signal control system |
| CN103956056B (en) * | 2014-05-16 | 2016-06-01 | 保定维特瑞交通设施工程有限责任公司 | Traffic signal wireless control system |
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Legal Events
| Date | Code | Title | Description |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20140924 Termination date: 20170516 |
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| CF01 | Termination of patent right due to non-payment of annual fee |