CN2616964Y - Expressway foggy-dog intelligent speed-limiting display device - Google Patents
Expressway foggy-dog intelligent speed-limiting display device Download PDFInfo
- Publication number
- CN2616964Y CN2616964Y CN 03245830 CN03245830U CN2616964Y CN 2616964 Y CN2616964 Y CN 2616964Y CN 03245830 CN03245830 CN 03245830 CN 03245830 U CN03245830 U CN 03245830U CN 2616964 Y CN2616964 Y CN 2616964Y
- Authority
- CN
- China
- Prior art keywords
- circuit
- output terminal
- input end
- amplifier
- natural light
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Fee Related
Links
Images
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The utility model relates to an intelligent speed limiting display device for foggy days on highway, which comprises a laser receiver used for receiving laser signals generated by lasers arranged on highways and converting the laser signals into electric signals; a natural light removal interfered circuit, used for eliminating interfering signals of natural light, the input end of the natural light-removal interfered circuit is connected with output end of the laser receiver; a signal processing unit with a micro processor or a single-chip microcomputer at core is used for signal amplification, analog-digital conversion and output of speed limiting standard electric signals corresponding to visibility, output end of the natural light removal interfered circuit is connected with input end of the signal processing unit; a display screen connected with display signal output end of the signal processing unit is used for displaying the speed limiting standard corresponding to visibility. The utility model can display safety driving speed according to the fog conditions so as to remind drivers in foggy days and prevent traffic accidents.
Description
Technical field
The utility model belongs to a kind of detector and alarm, and particularly relating to a kind of be applied on the highway when travelling in fog day can be according to the intelligent speed limit display device of the deep or light demonstration speed of a motor vehicle prompting message of mist.
Background technology
The generation of mist and the deep or light safety that is directly connected to driving thereof, particularly for the automobile of greasy weather at running on expressway, the collision accident that very easily knocks into the back causes the great person and the economic loss of many car crashes.Therefore the variation of in time understanding the mist condition is even more important for the driver and conductor.For addressing the above problem, many researchers have been made a large amount of useful work, on the highway of Beijing-Tianjin-Tangshan, set up three weather stations that mist is monitored jointly as Municipal Commission of Science and Technology and Beijing weather bureau, then gained data and satellite cloud picture are joined calculation, forecast by the radio station afterwards.Because this method gained parameter out of true, stepping is thinless yet, can only forecast two grades in the radio station: promptly, thick fog (1000 meters of visibility) and light mist (2000 meters of visibility) are also informed the reference that people should trip maybe should not go on a journey.This visibility standards is that international airline is used, and 1000 meters visibility has been dense fog really for aircraft, but is not really thick fog for the automobile of ground run at all, can run at high speed fully.Moreover owing on highway, do not have and to solve any practical problems of travelling in fog day for the caution facility of driver instructor safety traffic.In addition, domestic each province, city and each bar highway (or other highways) are again without any the automatic caution facility or the similar facilities of travelling in fog day.
Summary of the invention
The purpose of this utility model provides a kind of being installed on the highway and also can travel to remind the driver to take care in the greasy weather according to the deep or light greasy weather intelligence speed limit display device that demonstrates the safety traffic speed of a motor vehicle of mist, and generation avoids traffic accident.
For achieving the above object, the utility model adopts following technical scheme: highway greasy weather intelligence speed limit display device, and it comprises laser pickoff, is used to receive the laser signal that the laser instrument installed on the highway sends and converts it to electric signal; Eliminate the natural light interfered circuit, be used to remove the natural light undesired signal, its input end is connected with the output terminal of laser pickoff; One is the signal processing unit that core is formed with microprocessor or single-chip microcomputer, be used for to above-mentioned signal amplify, analog to digital conversion and the output standard of the limited speed electric signal corresponding with visibility, the output terminal of the input termination elimination natural light interfered circuit of this signal processing unit; A display screen is connected with the shows signal output terminal of signal processing unit, is used for showing and the corresponding standard of the limited speed of visibility.
Described signal processing unit is by the one-level amplifier, eliminate the white level circuit, two-stage amplifier, the A/D change-over circuit, microprocessor or single-chip microcomputer, code translator, power amplifier is formed, the one-level amplifier input terminal is connected with the output terminal of eliminating the natural light interfered circuit, the output terminal of one-level amplifier is connected with the input end of eliminating the white level circuit, the output terminal of eliminating the white level circuit is connected with the input end of two-stage amplifier, the output terminal of two-stage amplifier is connected with the input end of A/D change-over circuit, the output terminal of A/D change-over circuit is connected with the input end of microprocessor or single-chip microcomputer, the output terminal of microprocessor or single-chip microcomputer is connected with the input end of decoding scheme, the output terminal of decoding scheme is connected with the input end of power amplifier, and the output terminal of power amplifier is connected with the display screen input end.
Described elimination white level circuit is made up of a negative pressure reference source, trimmer potentiometer and some pull down resistors, and the center tap of potentiometer is connected with the output terminal of described one-level amplifier.
Described laser pickoff is a silicon photocell, and eliminating the natural light interfered circuit is the block condenser of connecting with laser pickoff, is connected to detection and filtering circuit at the output terminal of one-level amplifier.
Described laser pickoff also can be two silicon photocells, eliminates that the natural light interfered circuit is equated by two gains and the opposite polarity amplifier of output voltage is formed, and the output terminal of two silicon photocells links to each other with the input end of two amplifiers respectively.
Also have an electrical power carrier circuit to be connected with the output terminal of signal processing unit through promoting circuit.Electrical power carrier circuit is made up of optocoupler, modulation circuit, high-frequency amplifier circuit and coupling mechanism, the output terminal of the described promotion circuit of input termination of optocoupler, optocoupler output termination modulation circuit input end, the modulation circuit output terminal is connected with the input end of high-frequency amplifier circuit, the input end of the output termination coupling mechanism of high-frequency amplifier circuit.
The laser signal that the laser generator that the utility model utilizes the laser pickoff reception to be arranged on the highway appropriate location sends also is converted to electric signal, eliminating natural light interference back input signal processing unit, by signal processing unit with its amplification and carry out analog to digital conversion, because light wave has decay in various degree in the mist medium of variable concentrations, the program of being set by single-chip microcomputer or microprocessor utilization is carried out computing to the attenuation degree of signal, the electric signal of the corresponding safety traffic speed of a motor vehicle of the corresponding representative of concentration of output and mist is delivered to display screen and is shown.Therefore the utility model can be reminded driver's safety traffic, thus the generation that can effectively avoid traffic accident.Display device of the present utility model can be placed on the intermediate isolating band of highway at interval by certain distance, and at the supporting fog lamp in display screen place, so that the driver can more also can see information clearly.Because the utility model also disposes electrical power carrier circuit, therefore can will represent the electric signal of mist condition to be sent to freeway management the department repeater and the Zong Tai of configuration in addition by power network, repeater can be arranged on charge station, total platform can be located at Speedway Control Broad, repeater is for the oral prompting driver of the personnel of charge station, Speedway Control Broad then can utilize total platform that the mist condition is carried out tabulate statistics, so that the measure of closing is taked in the highway section that the mist condition is serious, or other possible situations are taked corresponding measure, and can accumulate the information of total platform as historical summary.
Description of drawings
Fig. 1 is a circuit block diagram of the present utility model;
Fig. 2 is a circuit theory synoptic diagram of the present utility model;
Fig. 3 is the circuit diagram of the another kind of form corresponding with dotted line institute frame partial circuit among Fig. 2;
Fig. 4 is the circuit theory synoptic diagram of electrical power carrier circuit.
Embodiment
As shown in Figure 1, highway greasy weather intelligence speed limit display device, it comprises laser pickoff, is used to receive the laser signal that the laser instrument installed on the highway sends and converts it to electric signal; Eliminate the natural light interfered circuit, be used to remove the natural light undesired signal, its input end is connected with the output terminal of laser pickoff; One is the signal processing unit that core is formed with microprocessor or single-chip microcomputer, be used for to above-mentioned signal amplify, analog to digital conversion and the output standard of the limited speed electric signal corresponding with visibility, the output terminal of the input end elimination natural light interfered circuit of this signal processing unit; A display screen is connected with the shows signal output terminal of signal processing unit, is used for showing and the corresponding standard of the limited speed of visibility.
Signal processing unit is by the one-level amplifier, eliminate the white level circuit, two-stage amplifier, the A/D change-over circuit, microprocessor or single-chip microcomputer, code translator, power amplifier is formed, the one-level amplifier input terminal is connected with the output terminal of eliminating the natural light interfered circuit, the output terminal of one-level amplifier is connected with the input end of eliminating the white level circuit, the output terminal of eliminating the white level circuit is connected with the input end of two-stage amplifier, the output terminal of two-stage amplifier is connected with the input end of A/D change-over circuit, the output terminal of A/D change-over circuit is connected with the input end of microprocessor or single-chip microcomputer, the output terminal of microprocessor or single-chip microcomputer is connected with the input end of decoding scheme, the output terminal of decoding scheme is connected with the input end of power amplifier, and the output terminal of power amplifier is connected with the display screen input end.Eliminate the white level circuit and be made up of a negative pressure reference source, trimmer potentiometer and some pull down resistors, the center tap of potentiometer is connected with the output terminal of described one-level amplifier.
Laser pickoff can adopt a silicon photocell, correspondingly, the laser generator of installing on highway is for producing the laser generator of pulse laser ripple, eliminating the natural light interfered circuit is the block condenser of connecting with laser pickoff, and is connected to detection and filtering circuit at the output terminal of one-level amplifier.
Laser pickoff also can adopt two silicon photocells, correspondingly, the laser generator of installing on highway is for producing the laser generator of continuous laser ripple, eliminate the natural light interfered circuit to be equated by two gains and the opposite polarity amplifier of output voltage is formed, the output terminal of two silicon photocells links to each other with the input end of two amplifiers respectively.
Electrical power carrier circuit is connected with the output terminal of signal processing unit through promoting circuit, it is made up of optocoupler, modulation circuit, high-frequency amplifier circuit and coupling mechanism, the output terminal of the described promotion circuit of input termination of optocoupler, optocoupler output termination modulation circuit input end, the modulation circuit output terminal is connected with the input end of high-frequency amplifier circuit, the input end of the output termination coupling mechanism of high-frequency amplifier circuit.
Below in conjunction with Fig. 2 and circuit theory diagrams shown in Figure 3 formation of the present utility model and principle of work are elaborated:
Any visible light wave all has decay in various degree when propagating in the mist medium.Utilize photoelectric effect that optical attenuation is become the decay of electric signal, the size of decay and the linear proportional relation of the concentration of mist are with the concentration of reflection mist.Because it is disturbed easily that mist is surveyed in short distance, as the formed local smoke of roadside burning thing, so adopt long apart from laser measurement.Consider that the normal optical fulgurite is to accept white light, and white light is unfavorable for the small power long distance transmission, and is difficult to guarantee the consistance of product focusing, thereby laser pickoff adopts two blue batteries of 2CR1226-01 silicon light that spectral responses are comparatively desirable.How reducing and even thoroughly eliminating the natural light interference then is the difficult problem that scientific and technological circle never have fine solution for many years.No matter being optical instrument or photovoltaic at present, also all is to prolong to attack traditional optical filtering principle, is not to add various plated films to add versicolor color filter exactly.Effect is preferably with very thin monocrystalline silicon piece comes the filtering visible light, measures with infrared light.So so can the elimination natural light, but comprise infrared light in the natural light, natural light has been filtered, useful infrared signal has also filtered a part.How many be this parts actually? the thin and thick of this and monocrystalline silicon piece has direct relation, and a coefficient is arranged in the middle of their.Coefficient is by the thin and thick decision, and any production technology can't guarantee that also thickness is in full accord, and this has just caused consistency of product very poor.In a word, the method for any optical filtering all will filter a part of useful signal, and is not only inaccurate but also be difficult to grasp.But helplessly have no alternative but also handy it.Therefore, in the utility model, the interference of natural light to be removed.As shown in Figure 2, eliminating the natural light interfered circuit is made up of two chopper amplifiers of IC1, IC2 (7650).C2, C3, C5, C6 are IC1, IC2 frequency compensation electric capacity, C1, and C4, C11, C18 are decoupling capacitance.7650 have the auto-zero function.Two silicon blue streak battery 2CR1,2,CR2 one positive instead connect in-phase input end the 5th pin of two amplifiers respectively, carry out homophase simultaneously and amplify.The gain of two amplifiers equate and output voltage polarity to be that IC1 is output as on the contrary negative, IC2 just is output as, and is added in potentiometer W1 two ends respectively and constitutes the loop from center tap over the ground through resistance R 9 again.IC2 output positive current is gone into ground through R9, and IC1 output negative current is to flow to IC1 by ground warp R9.Fine tuning W1 can make two electric currents equal fully, thereby cancels out each other, and has thoroughly eliminated the interference of natural light.
The light beam that laser generator sends projects after by mist wherein on the silicon photocell 2CR2, and then the signal of IC2 just is output as, because be difference mode signal, has no relation with the common-mode signal of natural light, so at all not without interruption, obtained amplification.IC3, IC4 are and the identical two-stage in-phase amplifier of IC1, IC2 to be used for the signal of eliminating after natural light disturbs is amplified.
Laser pickoff, elimination natural light interfered circuit and one-level amplifying circuit also can be as shown in Figure 3, only adopt a silicon photocell 2CR1 as laser pickoff, but this laser generator that needs will be installed on the highway changes the laser generator that can produce the pulse laser ripple into, correspondingly, adopt a block condenser C1 and silicon photocell to be in series, because what natural lighting produced on silicon photocell is direct current signal, so just can make it receive only pulsed light and not receive natural light, eliminate the purpose that natural light disturbs thereby reach.The electric signal forward that laser pickoff is received and converts to is input to amplifier IC1 (7650) in-phase input end after straight to carry out homophase and amplifies, for asking the amplifier working stability, adopt IC1, IC3, (7650) three grades of amplifiers of IC4 as the one-level amplifier altogether, make the output of the third level 7650 amplifiers reach desired voltage amplitude.Simultaneously, be connected to detection, the filtering circuit of forming by diode D1 (2AP9) and capacitor C 16, C22, make pulse signal convert direct current signal at the output terminal of IC4.
Because the penetration power of laser is very strong, pass 200 meters the thick fog 3.8-4.2% that only decays, so nearly about 96% all be useless DC voltage, equal signal voltage bottom to be added a very high DC level and raised.Directly do not amplify if do not deduct this DC level, will soon satisfy and close and effective signal section can't be carried out analog to digital conversion.So added one-2.5V TL431 reference source and current-limiting resistance R19 in the circuit, regulator potentiometer W2 offsets the negative current of 96% and equivalent in the positive current of IC4 output.The positive current direction of IC4 output is to be come out by IC4 the 6th pin, enters the W2 center tap,, goes into ground through R16 again through W2 to the right.The negative current that subtracts each other with it again through R18, R17, W2, R16 and ground constitutes loop by TL431 voltage stabilizing one-tenth-2.5V from-5V power supply after the R19 current limliting, its direction of current is to-5V by ground.Regulate W2 and can make two electric currents equal fully, make in the output voltage of IC4 and deduct 96% useless level (being referred to as ' white level '), remaining about 4% is useful signal voltage, proceeds to be amplified to effective breadth by IC5 and IC6 again.
The analog to digital conversion input requires peak signal voltage to reach+5V, and the signal voltage that deducts behind the white level has only about 0.04V, and then the full gain of IC5, IC6 is: 5 ÷ 0.04=125 doubly.The Q factor of IC6 (OP-07) is good not as IC5 (7650), hangs down so enlargement factor can be got, and then 7650 gains are got: 1+47 ÷ 2=24.5 doubly; OP-97 gets: 125 ÷ 24.5=5.1 doubly.So 7650 feedback resistance R15 is taken as 47K, and the feedback resistance of OP-07 is connected by R22 and W4, and R22 gets 4.3K, and W4 gets meticulousr that 2K can regulate.Wherein W3 (20K) regulates input offset voltage.Because the existence of offset voltage, when OP-07 tripod input voltage was zero, its 6th pin output voltage may not be zero, regulated W3 this moment and can make the OP-07 output voltage reach zero.C19 is the decoupling capacitance of OP-07.
Analog to digital converter IC7 selects ADC0804 for use, and the 6th pin is the analog quantity input end, and 18 to 11 pin are digital quantity output terminal D0～D7, connects an integrator of being made up of C21 and R24 because of having saved the external clock event.Its reference voltage input the 9th pin by R23 and TL431 form-2.5V reference source provides.C20 is that the power decoupling of A/D converter closes electric capacity.
Maximum speed limit on the highway is generally per hour 110 kilometers at present, 200 meters of front and back car minor increments, and front-and-rear vehicle distance is from just big more if speed per hour is high more.In other words, the driver is just with per hour 110 kilometers speed driving, and when the front truck of finding 200 meters, the place ahead when him stopped suddenly, he still had sufficient time to handle a series of actions such as stepping on clutch, gear shift, deceleration, brake, is safe.Therefore its essence is not speed, neither distance, but the time.We call this time ' safe operation time '.This time length be: 200m ÷ (110km * 1000 ÷ 3600)=6.54546S.No matter what speed and distance as long as 6.54546 seconds time is arranged, just can guarantee traffic safety.For this reason, we can be 200 meters visibility distances (abbreviation visibility) of regarding the greasy weather as, just can go out road speed by inverse by above-mentioned algorithm, we regard him as safety traffic speed (abbreviation speed limit), this formula is: 200m/6.54546s=30.55556m/s=110km/h, and can degree of opinion ÷ time constant=standard of the limited speed.Promptly can extrapolate the corresponding down safety traffic speed of various variable concentrations of mist according to this formula: promptly 200 meters-110 kilometers/hour, 180 meters-99 kilometers/hour, 160 meters-88 kilometers/hour, 140 meters-77 kilometers/hour, 120 meters-66 kilometers/hour, 100 meters-55 kilometers/hour, 80 meters-44 kilometers/hour, 60 meters-33 kilometers/hour, 40 meters-22 kilometers/hour, 20 meters-11 kilometers/hour.
Single-chip microcomputer IC8 (W78E54) is as center processing unit of the present utility model, and (P00～P07) connects the 11st to 18 pin of ADC0804, and (DB0～DB7) does the parallel port input to its 32nd to 39 pin.The standard of the limited speed corresponding down according to above-mentioned different mistiness degree, during coding 200 meters of different visibility, 180 meters, 160 meters, 140 meters, 120 meters, 100 meters, 80 meters, 60 meters, 40 meters, 20 meters following corresponding voltage are changed the data of coming and are input in the internal storage of single-chip microcomputer, as E
2The address code of PROM, and the pairing speed limit parameter of above each visibility write in the pairing unit, each address with 16 ary codes as ' data ' go.12MHz crystal JT1 and two 33P capacitor C25, C26 form the external oscillator of single-chip microcomputers, provide the fundamental frequency of 12MHz to single-chip microcomputer, connect 18,19 pin of W78E54 respectively, and making one-period is 1 μ S just, is convenient to computing.C27 and R25 form integrating circuit and connect W78E54 the 9th pin, provide the time-delay of 10 μ F * 10K Ω=100ms to make electrification reset to single-chip microcomputer and use.The 21st pin of single-chip microcomputer (P20 mouth) connects the sheet choosing of 0804 the 1st pin CS control 0804.External memory storage is write WR and external memory storage and is read RD and meet 0804 WR and RD respectively, and control is to 0804 read.The 12nd pin INT0 connects 0804 the 5th pin (INTR), controls external interrupt.Low four P10 to P13 (the 1st to 4 pin) of P1 mouth meet data input pin A, B, C, the D (the 7th, 1,2,6 pin) of decoding pusher IC9 (4511) as parallel data output; Front three P14 among the Gao Siwei, P15, P16 connect the sheet choosing end (the 5th pin) of three decoding pushers 4511 respectively, and control three 4511 and take turns to operate, and with the promotion circuit of data delivery to two-sided large display screen.The 11st pin serial ports output terminal (TXD), base stage and its below-center offset resistance R 27 by current-limiting resistance R26 meets triode G1 (9013) promote triode work, with the optocoupler input end of data delivery to carrier current channel.
As shown in Figure 4, electrical power carrier circuit is by photoelectrical coupler GO1 (LD609) and higher-order of oscillation modulator IC10 (UC3844); High frequency driving transformer L1～L3; High-power FET G2 (K2611); Hypervelocity fast recovery diode D2, D3 (HER107); Radio frequency power amplifier transformer B1; Rectification full-bridge BRIDGE (3A); High frequency choke coil LR (3A); Anti-interference assembly LB1 of common mode low pass and part resistance, appearance element are formed.Basic function and 555 time base circuits of higher-order of oscillation modulator IC10 are similar, 1,2 pin and R1, R2, C1 form dutyfactor adjustment circuit (is 0.5 by its dutycycle of numerical value among the figure) jointly, and the 3rd pin is the overcurrent monitoring side, and outer member comprises that divider resistance R6, R7 and filter capacitor C4 form.8 pin are internal reference voltage output ends, power to photoelectrical coupler by the pi filter that C2, R3, C3 form, and GO1 is photoelectrical coupler (LD609), and R8 is its pull-up resistor, and D1 is that diode (4148) is irritated in counnter attack.4 pin are that control end, 6 pin are output terminals.When optocoupler received signal conduction, 4 pin were clamped to low level, and then 6 pin are just exported the 100KHz high frequency square wave, otherwise, with regard to no-output.R4, R5 are the output divider resistances, and C6 is an output coupling capacitor.The high-frequency signal of 100KHz is coupled to the primary coil of transformer by C6, L1 passes the signal along to two groups of secondary coil L2 and L3, promote two high-power FET G1, G2 (K2611) respectively, R9, R11 are the grid current-limiting resistances of two field effect transistor, R10, R12 are respectively the grid leak resistances of two pipes, and purpose is released the electronics that accumulates on the grid over the ground.Carrier power source is powered after by the direct rectification of 220V50Hz, filtering, thus in the loop DC voltage very high (220 * 1.4142 * 2=622V), because the self-induction of transformer, virtual voltage can reach 1000V, has reached the limit of field effect transistor.So with two substring connection uses by all means, share respectively that half is safer.The effect of two fast recovery diode D2, D3 (HER107) is: when two field effect transistor conductings, electric current flows through the power amplifier transformer with iron core magnetization (being converted to magnetic energy by electric energy), when two field effect transistor are ended, the iron core demagnetization is converted to electric energy to magnetic energy by coil again, the direction of this electric current in transformer remains unchanged, remain under go out, judgement from voltage, since it is anodal that electric current flows out certain lower end by the coil lower end, two field effect transistor are said that what add is reverse voltage, so burn.Two fast recovery diode D2 and D3 is anti-phase respectively is connected in the loop; when two field effect transistor conductings; D2, oppositely not conducting of D3; and two field effect transistor by the time; coil discharge; its direction is just in time consistent with D2, D3 direction, then respectively this reverse voltage is sent back to positive and negative power supply through D3, D2, thereby has protected a pair of field effect transistor.Power amplifier transformer secondary output two ends meet high-voltage capacitance C7, a C8 (0.33 μ F/250V) respectively and insert city's electrical network as carrying device.This two capacity its capacitive reactance for 100KHz has only 1/2 π * 10
5* 0.33 * 10
6* 2=9.65 Ω, and for 50Hz, its capacitive reactance but has 1/2 π * 50 * 0.33 * 10
-6* 2=19.3K Ω, therefore, it has guaranteed not to be subjected to city's electrical interference and can be sending that carrier signal is not suffered a loss.The carrier current channel power unit is formed (comprising a magnetic ring transformer LB1 and four high-voltage capacitor C11, C12, C13, C14) by filter capacitor C9 (100 μ F/250V), C10 (0.01 μ F/2000V) and rectification full-bridge (3A/1000V), high frequency choke coil, the anti-interference assembly of common mode low pass.The effect of filter capacitor is to filter the 50Hz ripple and improve the power source loads ability.The effect of the anti-interference assembly of common mode low pass is that other common-mode signals except that 50 weeks are forbidden to pass through without exception.The effect of high frequency choke coil is to prevent to send to the online carrier signal of civil power to return from power circuit once again, causes wave form distortion.
The utility model can by the distribution probability (about 25-35 kilometer) of mist substantially with the corresponding setting in crossing that is provided with by nature administrative area, county, be provided with one on the close highway intermediate isolating band at each crossing.It can show different safety traffic speed according to the variable concentrations variation of mist, reminds vehicular traffic to note with eye-catching big word, avoids accident to take place.Simultaneously, (repeater is located at charge station in the digital communication mode mist condition (visibility) to be sent to repeater and Zong Tai, total platform is located at Speedway Control Broad, TV station and observatory respectively), repeater is for the personnel of the charge station oral prompting driver that sets out on a journey, total platform is inquired about each highway section data automatically, gather and show and print different mist conditions on the whole piece highway, for the accumulation of traffic administration, weather forecast and mist condition historical summary.
Claims (7)
1, highway greasy weather intelligence speed limit display device is characterized in that,
It comprises laser pickoff, is used to receive the laser signal that the laser instrument installed on the highway sends and converts it to electric signal;
Eliminate the natural light interfered circuit, be used to remove the natural light undesired signal, its input end is connected with the output terminal of laser pickoff;
One is the signal processing unit that core is formed with microprocessor or single-chip microcomputer, be used for to above-mentioned signal amplify, analog to digital conversion and the output standard of the limited speed electric signal corresponding with visibility, the output terminal of the input termination elimination natural light interfered circuit of this signal processing unit;
A display screen is connected with the shows signal output terminal of signal processing unit, is used for showing and the corresponding standard of the limited speed of visibility.
2, speed limit display device as claimed in claim 1, it is characterized in that, described signal processing unit is by the one-level amplifier, eliminate the white level circuit, two-stage amplifier, the A/D change-over circuit, microprocessor or single-chip microcomputer, code translator, power amplifier is formed, the one-level amplifier input terminal is connected with the output terminal of eliminating the natural light interfered circuit, the output terminal of one-level amplifier is connected with the input end of eliminating the white level circuit, the output terminal of eliminating the white level circuit is connected with the input end of two-stage amplifier, the output terminal of two-stage amplifier is connected with the input end of A/D change-over circuit, the output terminal of A/D change-over circuit is connected with the input end of microprocessor or single-chip microcomputer, the output terminal of microprocessor or single-chip microcomputer is connected with the input end of decoding scheme, the output terminal of decoding scheme is connected with the input end of power amplifier, and the output terminal of power amplifier is connected with the display screen input end.
3, speed limit display device as claimed in claim 2, it is characterized in that, described elimination white level circuit is made up of a negative pressure reference source, trimmer potentiometer and some pull down resistors, and the center tap of potentiometer is connected with the output terminal of described one-level amplifier.
4, as claim 2 or 3 described speed limit display device, it is characterized in that, described laser pickoff is a silicon photocell, and eliminating the natural light interfered circuit is the block condenser of connecting with laser pickoff, is connected to detection and filtering circuit at the output terminal of one-level amplifier.
5, as claim 2 or 3 described speed limit display device, it is characterized in that, described laser pickoff is two silicon photocells, eliminate the natural light interfered circuit to be equated by two gains and the opposite polarity amplifier of output voltage is formed, the output terminal of two silicon photocells links to each other with the input end of two amplifiers respectively.
6, as claim 1,2 or 3 described speed limit display device, it is characterized in that also having an electrical power carrier circuit to be connected with the output terminal of signal processing unit through promoting circuit.
7, speed limit display device as claimed in claim 6, it is characterized in that, electrical power carrier circuit is made up of optocoupler, modulation circuit, high-frequency amplifier circuit and coupling mechanism, the output terminal of the described promotion circuit of input termination of optocoupler, optocoupler output termination modulation circuit input end, the modulation circuit output terminal is connected with the input end of high-frequency amplifier circuit, the input end of the output termination coupling mechanism of high-frequency amplifier circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03245830 CN2616964Y (en) | 2003-05-16 | 2003-05-16 | Expressway foggy-dog intelligent speed-limiting display device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 03245830 CN2616964Y (en) | 2003-05-16 | 2003-05-16 | Expressway foggy-dog intelligent speed-limiting display device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2616964Y true CN2616964Y (en) | 2004-05-19 |
Family
ID=34251802
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 03245830 Expired - Fee Related CN2616964Y (en) | 2003-05-16 | 2003-05-16 | Expressway foggy-dog intelligent speed-limiting display device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2616964Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692307B (en) * | 2009-10-16 | 2011-04-13 | 合肥霍金光电科技有限公司 | Expressway fog real-time monitoring instrument |
| CN102480232A (en) * | 2010-11-30 | 2012-05-30 | 永济新时速电机电器有限责任公司 | Single-ended flyback switching power supply and control device thereof |
| CN103593993A (en) * | 2013-11-27 | 2014-02-19 | 东南大学 | Expressway congestion early warning and dynamic speed-limiting method under condition of fog |
-
2003
- 2003-05-16 CN CN 03245830 patent/CN2616964Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101692307B (en) * | 2009-10-16 | 2011-04-13 | 合肥霍金光电科技有限公司 | Expressway fog real-time monitoring instrument |
| CN102480232A (en) * | 2010-11-30 | 2012-05-30 | 永济新时速电机电器有限责任公司 | Single-ended flyback switching power supply and control device thereof |
| CN103593993A (en) * | 2013-11-27 | 2014-02-19 | 东南大学 | Expressway congestion early warning and dynamic speed-limiting method under condition of fog |
| CN103593993B (en) * | 2013-11-27 | 2015-11-25 | 东南大学 | One to have under mist condition through street congestion warning and dynamic method for limiting speed |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN102436762B (en) | Highway intelligent aided guidance system based on GPRS (General Packet Radio Service)/CDMA (Code Division Multiple Access) wireless network and control method thereof | |
| CN2906786Y (en) | Interactive intelligent spike and its road net information system | |
| CN209928620U (en) | Intelligent traffic prompting system with laser radar detection and virtual light curtain | |
| CN2616964Y (en) | Expressway foggy-dog intelligent speed-limiting display device | |
| CN107067751A (en) | Road construction area, which slows down, to test the speed integrated safe control and information feedback system | |
| CN110675641B (en) | Vehicle networking road traffic signal control system based on LTE-V2X | |
| CN115083183A (en) | Intelligent induction lamp system for expressway | |
| CN202275513U (en) | Wireless network speedway auxiliary induction system based on GPRS/CDMA | |
| CN114521039A (en) | Smart city street lamp control system and method | |
| CN202042057U (en) | Traffic light control system | |
| CN208622243U (en) | State saves highway grade crossing acousto-optic warning system | |
| CN2916799Y (en) | Foggy day traffic safety management device | |
| CN218917954U (en) | Tunnel information monitoring system | |
| CN112985271B (en) | Intelligent variable frequency roadbed displacement monitoring and early warning device based on FBG grating sensor | |
| CN212847156U (en) | Intelligent urban traffic control device based on Internet of things application technology | |
| CN210442961U (en) | Internet vehicle road cooperative driving guidance system | |
| CN208903430U (en) | A kind of intelligent transportation system | |
| CN2163412Y (en) | Automatic emitting and receiving device for crossing meeting of train and motor-vehicle | |
| CN204315086U (en) | A kind of slag-soil truck safety traffic supervisory systems | |
| CN208271400U (en) | A kind of highway relates to road operation safety intelligent early-warning system | |
| CN202362942U (en) | System for changing road traffic rule in real time according to traffic flow | |
| CN218866616U (en) | Early warning device for special highway section | |
| CN220266359U (en) | Portable wisdom perception formula warning equipment of board | |
| CN217637535U (en) | Urban waterlogging ponding monitoring devices and system | |
| CN109737973A (en) | A kind of interactive mode real-time navigation system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |