CN1549224A - Vehicle detecting apparatus - Google Patents
Vehicle detecting apparatus Download PDFInfo
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- CN1549224A CN1549224A CNA031261523A CN03126152A CN1549224A CN 1549224 A CN1549224 A CN 1549224A CN A031261523 A CNA031261523 A CN A031261523A CN 03126152 A CN03126152 A CN 03126152A CN 1549224 A CN1549224 A CN 1549224A
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Abstract
The vehicle detecting device consists of detecting unit, signal processing/transmitting unit and power supply. The detecting unit consists of geomagnetic imaging detector and sound, vibration, pressure, ultrasonic, temperature or microwave detector; the signal processing/transmitting unit includes at least amplifier and may have microprocessor, I/O interface, radio signal or fiber signal transmitter as well as sub-detecting unit. The present invention can be used to obtain traffic flow, road occupying rate, vehicle rate, parking time, and other information and may be used widely in traffic and park monitoring, management and command. The present invention has the advantages of low cost, small size, modulization, high reliability, etc.
Description
Technical field
The present invention relates to a kind of sniffer, particularly relate to a kind of motor vehicle detector, this device can be used for occasions such as municipal highway point duty, vehicle and vehicle flowrate detection, vehicle gate inhibition, parking lot management.
Background technology
Raising along with expanding economy and living standards of the people, automobile more and more near-earth is walked close to people's life, urban transportation and highway communication jam happen occasionally, particularly the traffic of large-and-medium size cities has been one of focal issue of government, common people's concern, make great amount of manpower and material resources, fund input to road reformation and road construction aspect, nonetheless, do not catch up with the rapid growth of traffic pressure yet, this situation is very general, the area that reaches all the more of economy particularly, the traffic congestion phenomenon is serious more; Some area, through want of funds, road reformation and road construction be objectively also difficult, in the face of the unfavorable situation of traffic pressure will the long term existence; On the other hand, path resource does not make full use of and taps the latent power, and causes the path resource waste quite serious yet, allows the people feel more pained.Therefore, how make full use of and tap the latent power path resource, improve at low cost, utilization rate, vehicle flow and the car speed of road effectively, it is the target that is worthy of consideration and pursues, address this problem and to set up perfect, efficiently and cheaply traffic information system, traffic control system and the management system of parking, and vehicle and vehicle flowrate detector are important rings wherein.
At present, the detector of relevant vehicle adopt mostly passive infrared come the detection vehicle signal and amplify after be transferred to point duty department, be 98802297.4 " motor vehicle detector " etc. as the application number of patent Siemens Company; Also having some is to be sniffer with large-scale inductive coil, vehicle is during through large-scale inductive coil, vehicle becomes the magnetic core of large-scale inductive coil, make the inductance value of its coil change, this coil forms the vehicle detection signal with other circuit, is generally frequency signal, send processor to handle, obtaining transport information such as vehicle flowrate, promptly is like this as the used non-locomotive of the disclosed intelligent traffic flow detector of a ZL93212566.2 Chinese invention patent inductive coil; These sniffers exist the vehicle detection mode single, and detection information is not comprehensive, poor in timeliness, the shortcoming that perhaps volume is big, installation is inconvenient.In addition, U.S. Nu-metrics company produces a kind of permanent type wireless vehicle register that utilizes vehicle magnetic reflection (VMI) commercial measurement vehicle flowrate, but this sniffer is to the travel speed of detection vehicle, and slower to the speed of a motor vehicle or that rest in its installed position or when resting near its installation site vehicle and surveying, limitation and deficiency with function or aspect of performance can not satisfy the monitoring, management, command system of urban traffic intersection, parking lot and the road grid traffic requirement to motor vehicle detector fully.
Summary of the invention
The purpose of this invention is to provide more fully motor vehicle detector of a kind of information of vehicles with multiple detection mode, detection, to solve the deficiency of existing motor vehicle detector.
For achieving the above object, the present invention adopts following technical scheme: a kind of motor vehicle detector, comprise probe unit, signal Processing/transmission unit and the power supply formed with vehicle earth magnetism reflection detector, power supply is the each several part power supply, signal Processing/transmission unit includes amplifier at least, the input end of the output termination signal Processing/transmission unit of vehicle earth magnetism reflection detector, described probe unit also comprises sound/vibration/pressure detector or vehicle ultrasonic detector, and its output terminal is connected with the input end of signal Processing/transmission unit.
Described probe unit is provided with a temperature sensing unit, and its output terminal is connected with the input end of signal Processing/transmission unit.
Described probe unit is provided with a microwave sounding unit, and its output terminal is connected with the input end of signal Processing/transmission unit.
Signal Processing/transmission unit also comprises input/output interface, radio signal transmission device or the fiber-optic signal transmitting device that is used to export vehicle detection information and motor vehicle detector self check information, and the output terminal of amplifier is connected with the input end of radio signal transmission device or fiber-optic signal transmitting device.
Described signal Processing/transmission unit also includes microprocessor, the output terminal of every road amplifier and being used to monitors that the power supply output monitoring point of supply voltage monitors that with being used to the monitoring point of amplifying circuit duty is connected with the data acquisition/input bus of microprocessor, and the data bus of radio signal transmission device or fiber-optic signal transmitting device is connected with control bus with the data bus of microprocessor respectively with control bus.
Described power supply is accumulator or solar battery group.
The plug into sub-probe unit of independent case of described signal/transmission processing unit, sub-probe unit comprises at least one vehicle earth magnetism reflection detector, its output terminal is connected with the input end of signal Processing/transmission unit.
Sniffer of the present invention not only is applicable to the detection of the speed of a motor vehicle, vehicle flowrate, stoppage of vehicle and road occupying time, road occupancy and pavement temperature to vehicle, also can be used for the security monitoring field.Its volume is little, modularization, compact conformation, reliability height, flexible for installation, convenient, fast, can adopt the full seal type shell, require low, non-maintaining to installing environmental conditions, be particularly suitable for outdoor and open-air use, abominable weather environment as rain, blow, sandstorm, temperature variation be to the not influence of its result of use.The present invention can export two-way or the above sensing electric signal of two-way is given signal processing unit, reaching detection information learns from other's strong points to offset one's weaknesses, improve the reliability of sniffer, increase the quantity of information of sniffer, therefore can satisfy the needs of different application scenarios and field, different technical requirement, different detection purpose better.Use earth magnetism image sensor spare, sound/vibration/pressure sensor or ultrasound wave/radio microwave sounding assembly and temperature sensor can sample the earth magnetism image signal of vehicle respectively, acoustic signals/vibration signal/pressure signal or ultrasonic listening signal/radio microwave sounding signal, and vehicle radiating temperature signal or pavement temperature signal, by amplitude to above-mentioned signal, frequency, width, signal envelope amplification speed and time domain specification are handled, analysis-by-synthesis obtains vehicle flowrate, the road occupancy, the speed of a motor vehicle, down time, information such as vehicle length and pavement temperature.During installation, can on the track, hole and be embedded in pavement of road, not take the above space of pavement of road; Certainly, also can be installed in pavement of road above, do not influence vehicle by and be no more than the locus of detection range.The present invention is applicable to large, medium and small urban transportation commander and management system and regional traffic information network system, in addition, sniffer of the present invention also can be used in security monitoring, the warning system, be installed on the object that is monitored, when object was rocked and be mobile, the sniffer on it sent alerting signal.
Description of drawings
Fig. 1 cuts open front view for the office of the embodiment of the invention 1.
Fig. 2 is the vertical view of Fig. 1.
Fig. 3 is the circuit theory legend 1 of the embodiment of the invention 1.
Fig. 4 is the circuit theory legend 2 of the embodiment of the invention 1.
Fig. 5 is the circuit theory legend 3 of the embodiment of the invention 1.
Fig. 6 cuts open front view for the office of the embodiment of the invention 3.
Fig. 7 is the vertical view of Fig. 6.
Fig. 8 is the circuit theory diagrams of the embodiment of the invention 3.
Fig. 9 cuts open front view for the office of the embodiment of the invention 4.
Figure 10 is the vertical view of Fig. 9.
Figure 11 is the circuit theory diagrams of the embodiment of the invention 4.
Figure 12 is the circuit theory diagrams of the embodiment of the invention 5.
Embodiment
As shown in Figure 1, 2, the sniffer of present embodiment is made up of aluminium mass shell body loam cake 1, ordinary steel housing lower cover 2, earth coil 3, earth coil extension line 4, earth coil skeleton 5, earth coil magnetic core 6, earth coil magnetic core upper cover plate 7, earth coil magnetic core lower cover slip 8, sound/vibration/pressure detector 9, photoelectric sound sensor spare extension line 10, thermal resistance 11, thermal resistance extension line 12, circuit board 13, external cable 14 and O-ring seal 15.Male thread links in case top lid 1 lower port and housing lower cover 2 upper port, earth coil 3 places on the earth coil skeleton 5, be installed with earth coil magnetic core 6 in earth coil skeleton 5 center pits, its two ends are provided with earth coil magnetic core upper cover plate 7 and earth coil magnetic core lower cover slip 8, circuit board 13 is fixed in the downside of earth coil magnetic core lower cover slip 8, sound/vibration/pressure detector 9 and thermal resistance 11 are arranged in the mounting hole on case top lid 1 top, earth coil extension line 4, photoelectric sound sensor spare extension line 10 links to each other with circuit board 13 with thermal resistance extension line 12.It is to be noted, the part of housing or its all are non-magnetic shielding material, as magnetic conduction or half permeability magnetic materials such as plastics, pottery, copper, aluminium, purpose is to guarantee that the magnetic field of the earth is influenced by tested vehicle and vehicle earth magnetism reflection that the variation that causes forms can be experienced by the earth magnetism sensitive detection parts and gets final product.
The circuit theory that is illustrated in figure 3 as present embodiment is 1 schematic diagram for example, power supply is made of mu balanced circuit U1, acquisition of signal unit magnetic detector L harmony/vibration by ground/pressure detector M constitutes, signal processing unit is made of resistance R 1--R15, capacitor C 1--C11, voltage stabilizing diode W1, transistor Q1 and Q2, integrated two amplifier U2, input/output module by power lead 1. 2., 4. 3. signal wire constitute.Wherein, earth magnetism probe unit L is an earth coil, and sound/vibration/pressure probe unit M is a photoelectric sound sensor spare; Signal processing unit divides two parts, it is earth magnetism detectable signal processing section harmony/vibration/pressure detectable signal processing section, earth magnetism detectable signal processing section is made of resistance R 81--R6, capacitor C 1--C5, voltage stabilizing diode W1 and transistor Q1 and Q2, the magnetic detection signal carries out bandpass filtering and amplification over the ground, 3. transfers out by signal wire; Sound/vibration/pressure detectable signal processing section is made of two amplifiers among resistance R 7--R15, capacitor C 6--C11, the integrated two amplifier U2, and sound/vibration/pressure detectable signal is carried out bandpass filtering and amplification, 4. transfers out by signal wire; Mu balanced circuit U1 can be the fixed stably volt circuits of three ends, as 7805,78L05,7812,78L12 etc., also can be the adjustable mu balanced circuit of three ends, as LM317 etc., and also available voltage stabilizing diode etc. certainly; Integrated two amplifier U2 can be LM258, LM358 etc., also can be other alternative amplifier models.
As shown in Figure 4, be the circuit theory of present embodiment 2 schematic diagram for example, power supply is made of mu balanced circuit U1, the acquisition of signal module is made of earth magnetism probe unit L harmony/vibration/pressure probe unit M, signal processing unit is made of resistance R 16--R40, capacitor C 12--C22, voltage stabilizing diode W1, switching diode D1 and D2, transistor Q1 and Q2, integrated two amplifier U3 and integrated four high guaily unit U4, input/output module by power lead 1. 2., 4. 3. transistor Q3 and signal wire constitute.With the circuit theory of present embodiment 1 different be for example, signal processing unit and input/output module are complicated than it, earth magnetism detectable signal processing section is made up of resistance R 16--R27, capacitor C 12--C16, voltage stabilizing diode W1, switching diode D1 and D2, transistor Q1 and Q2, integrated two amplifier U3, the magnetic detection signal carries out bandpass filtering, amplification and impulse transfer over the ground, 3. the base stage of oxide-semiconductor control transistors Q3 forms OC output by transistor Q3 collector and signal wire; Sound/vibration/pressure detectable signal processing section is made up of resistance R 28--R40, capacitor C 17--C22, integrated four high guaily unit U4, and sound/vibration/pressure detectable signal is carried out bandpass filtering and amplification, 4. transfers out by signal wire.Integrated four high guaily unit U4 can be LM224, LM324, also can be other interchangeable amplifier models such as 14574B.
As shown in Figure 5, be the circuit theory of present embodiment 3 schematic diagram for example, power supply is made of mu balanced circuit U1, filter capacitor C29, C29, C30, the acquisition of signal module is made of earth magnetism probe unit L harmony/vibration/pressure probe unit M, signal processing unit is made of resistance R 41--R57, capacitor C 23--C28 and C32--37, integrated four high guaily unit U5 and U6, one-chip computer U7, input/output module by power lead 1. 2., 5. standard input/output circuitry assembly I/O and signal wire constitute.With the circuit theory of present embodiment 2 different be for example, signal processing unit has the intelligent signal processing ability, and I/O I/O assembly is made by standard agreement, versatility better, more reliable, function is more.Resistance R 41--R48, capacitor C 23--C28 and integrated four high guaily unit U5 form the interface circuit of earth magnetism detectable signal and one-chip computer U7, the interface circuit of resistance R 49--R57, capacitor C 32--C37 and integrated four high guaily unit U6 composition sound/vibration/pressure detectable signal and one-chip computer U7, one-chip computer U7 the two-way transducing signal carried out bandpass filtering and amplification respectively, so that can carry out A/D conversion, the storage of number a tree name to transducing signal, the number a tree name is handled with analyze, obtain assessment result and control signal etc.One-chip computer U7 is AVR single chip computer AT 90S8535, AT90SMEG103 or TINY15 etc., and input/output circuitry assembly I/O is RS-485, RS-232 or C-BUS etc.
The vehicle detection uniqueness that the earth magnetism probe unit has moving is good, and detectable signal information is complete, dependable performance, is subjected to such environmental effects very little, hardly with safeguarding; But, the earth magnetism probe unit is when surveying vehicle static or that translational speed is very slow, detection performance is undesirable, part link in some application exists the low weakness of detection sensitivity, and whether whether as having on the track of traffic intersection vehicle is waited for, stopped on the parking stall in parking lot etc.Sound/vibration/pressure probe unit has detection sensitivity height, complete, the dependable performance of detectable signal information, and actionless or mobile vehicle is all had detectivity; But sound/vibration/pressure probe unit is at sound wave that detection vehicle produced, when vibration that the vehicle road pavement produces or pressure, detection of a target uniqueness is bad, be subjected to such environmental effects bigger, exist when surveying at each car and survey inaccurate weakness in some application scenario, as to the road of multilane (more than) or in parking lot together, a plurality of parking stalls, when the vehicle on a certain track or the parking stall is surveyed, the sound wave that vehicle produced on adjacent lane or the parking stall, vibration or pressure can produce stronger undesired signal on sound/vibration/pressure probe unit, to such an extent as to unclear respectively whether be vehicle on its detection track or the parking stall.
The principle of work of earth magnetism probe unit, this probe unit serve as that the basis constitutes with the earth magnetism sensitive detection parts, and the magnetic field of the earth image signal that is produced when passing through at the detector place or stopping with detection vehicle is a purpose.Because every vehicle changes through the out-of-date magnetic field of the earth of this detector that makes from detector (vehicle vertically covers detector) or from (distance can be set) near it, when the earth magnetism sensitive detection parts are earth coil, make the magnetic field in the earth coil that passes acquisition of signal module in the detector that corresponding the variation also be taken place immediately, corresponding variation also takes place in the induction electromotive force at earth coil two ends, between the earth coil two ends, obtain vehicle earth magnetism image signal, when perhaps the earth magnetism sensitive detection parts are the earth magnetic field intensity senser element, also obtain reflecting the vehicle earth magnetism image signal of vehicle earth magnetic field intensity, the amplitude characteristic of this vehicle earth magnetism image signal, time domain specification, and the phase place of signal variation, signal message such as frequency and polarity is all with the vehicle length of corresponding vehicle, the speed of a motor vehicle and travel direction exist certain corresponding relation.In like manner, whether this probe unit also can be rocked itself is reacted, principle of work is as follows, because when this probe unit is rocked, corresponding variation also takes place in the earth magnetism image signal on earth coil wherein or the earth magnetic field intensity senser element, the detector that has this probe unit is installed to is detected on the object, the detectable object that is detected has or not and rocks generation.Common earth magnetism sensitive detection parts have earth coil device, Hall element, magnetic vector senser element, fluxgate type senser element and hybrid magnetic senser element etc., and earth coil can be provided with or not be provided with magnetic core as required.
Sound/vibration/pressure probe unit is with sound, vibration or pressure sensor are that the basis constitutes, because every vehicle is from detector or from passing through near it, stop or open (moving) when walking, its engine can produce sound wave, also can satisfy the need simultaneously () face generation vibration and pressure, these physical quantitys one of them is received and converts to electric signal by this probe unit at least, the amplitude of this electric signal variation characteristic and vehicle in time is a process, stop or open (moving) and walk corresponding, promptly this electric signal from small to large, signal continues (at the sound, vibration signal stops) or from big to small, amplitude is arranged---the time domain variation characteristic, thus can judge that vehicle is a process, stop or open (moving) and walk.When but this probe unit is selected the senser element of perception vibration for use, whether this probe unit also can be rocked itself or move and react, when being rocked or be mobile, it can export corresponding electric signal, the detector that has this probe unit is installed to is detected on the object, the detectable object that is detected has or not to rock or move and takes place.Common sound/vibration/pressure sensor, as condenser type, resistance-type, magneto-electric, photoelectric sound sensor spare, the mercury formula, piezoelectric type, steel-ball type, semiconductor-type, photo-electric, hybrid vibrating sensing device, diaphragm type, the variable inductance formula, the strain chip, differential transformer type, semiconductor-type, hybrid pressure sensors etc. all can be selected for use, can select corresponding sound for use according to different needs, vibration or pressure sensor or assembly constitute the energy sound wave that detection vehicle produced, sound/vibration/pressure the probe unit of vibration or pressure, especially a kind of by the diaphragm of surveying sound wave, light source, light barrier and optical detection device can preferentially be selected for the photoelectric sound sensor spare that the basis constitutes, this photoelectric sound sensor spare not only can detect the sound wave that vehicle produces, when this photoelectric sound sensor is embedded in track or parking stall, can also detect vehicle satisfy the need () the face vibration and the pressure that produce, and have highly sensitive, frequency response range is wide, result of use is not influenced by the installation site, volume is little, cost is low, characteristics such as good airproof performance.
In diagram, the present embodiment difference from Example 1 is not that sound/vibration/pressure detector becomes ultrasonic detector to present embodiment.Ultrasonic detector adopts active sonar detection, range measurement principle, makes based on piezoelectric ceramic vibrator, when transmitting, by adding to the alternating voltage of piezoelectric ceramic vibrator, produces mechanical vibration, emits ultrasound wave; On the contrary, when received signal, by the reflection wave that comes from vehicle, make piezoelectric ceramic vibrator produce mechanical vibration, produce alternating voltage, from its amplitude, frequency---the time domain variation characteristic, can obtain having or not vehicle process, stop, the speed of a motor vehicle, distance or vehicle length information.
Shown in Fig. 6,7, the sniffer of present embodiment is made up of case top lid 1, housing lower cover 2, earth coil 3, earth coil extension line 4, earth coil skeleton 5, earth coil magnetic core 6, earth coil magnetic core upper cover plate 7, earth coil magnetic core lower cover slip 8, photoelectric sound sensor spare 9, photoelectric sound sensor spare extension line 10, thermal resistance 11, thermal resistance extension line 12, circuit board 13, signal input/output unit 16, battery pack 17 and O-ring seal 15.Male thread links in case top lid 1 lower port and housing lower cover 2 upper port, earth coil 3 places on the earth coil skeleton 5, be installed with earth coil magnetic core 6 in earth coil skeleton 5 center pits, its two ends are provided with earth coil magnetic core upper cover plate 7 and earth coil magnetic core lower cover slip 8, circuit board 13 is fixed in the downside of earth coil magnetic core lower cover slip 8, sound/vibration/pressure detector 9 and thermal resistance 11 are arranged in the mounting hole on case top lid 1 top, earth coil extension line 4, photoelectric sound sensor spare extension line 10 links to each other with circuit board 13 with thermal resistance extension line 12, battery pack 17 is arranged on housing lower cover 2 bottoms, and signal input/output unit 16 is arranged between circuit board 13 and the battery pack 17.
Figure 8 shows that the circuit theory diagrams of present embodiment, power supply is made of mu balanced circuit U1, filter capacitor C44, C45, C46 and battery pack E, the acquisition of signal module is made of earth magnetism probe unit L, sound/vibration/pressure probe unit M and temperature probe unit Rt, signal processing unit is made of resistance R 58--R79, capacitor C 38--C43 and C47--54, integrated four high guaily unit U5 and U6, one-chip computer U7, and 5. input/output module is made of standard input/output circuitry assembly I/O and signal input/output unit.With the electrical principle of embodiment 13 different be for example, increased temp sensing function, power supply changes by the battery pack power supply, and I/O I/O and signal input/output unit can be wireless radio transmission assembly or optical cable transmission assembly.
Shown in Fig. 9,10, the sniffer of present embodiment is made up of case top lid 1, housing lower cover 2, radio microwave vehicle exploring antenna 20, Hall element 18, fixed head 19, circuit board 13, electric connector 21 and O-ring seal 15.Male thread links in case top lid 1 lower port and housing lower cover 2 upper port, radio microwave vehicle exploring antenna 20 is arranged on the housing internal upper part, is arranged on the upside of fixed head 19 with Hall element 18, and circuit board 13 is arranged on the downside of fixed head 19.Be pointed out that because the difference of the concrete principle of the radio microwave sounding target information of using, selected vehicle detection antenna form is also different, many various ways such as autodyne machine loop antenna, waveguide leaky antenna, millimeter wave electromagnetic horn of not reining in are arranged continuously; Sniffer can carry out the plastics embedding as required.
As shown in figure 11, electrical schematic diagram for present embodiment, power supply is made of mu balanced circuit U1, the acquisition of signal module is made of earth magnetism probe unit U8, microwave sounding unit and temperature probe unit U10, signal processing unit is made of resistance R 80--R97 and R103--R106, capacitor C 55--C66 and C71--C74, integrated four high guaily unit U9 and U11, input/output module by power lead 1. 2., 8. 7. 6. signal wire constitute.Wherein, earth magnetism probe unit U8 is made of Hall element; The microwave sounding unit comprises autodyne machine formula dobla tours antenna V, transistor Q4, inductance L 1--L4, resistance R 98--R102, structure distribution capacitor C 67--C70; Signal processing unit divides three parts, be earth magnetism detectable signal processing section, microwave sounding signal processing and temperature detectable signal processing section, earth magnetism detectable signal processing section is made of resistance R 80--R88, capacitor C 55--C60, integrated four high guaily unit U9, the magnetic detection signal carries out bandpass filtering and amplification over the ground, 6. transfers out by signal wire; The microwave sounding signal processing is made of No. 4 amplifier among resistance R 103--R106, capacitor C 71--C74, the integrated four high guaily unit U11, and the microwave sounding signal is carried out bandpass filtering and amplification, 8. transfers out by signal wire; Temperature detectable signal processing section is made of the 1st, 2, No. 3 amplifier among resistance R 89--R97, capacitor C 61--C66, the integrated four high guaily unit U11, the temperature detectable signal is carried out bandpass filtering and amplification, 7. transfer out by signal wire, the hygrosensor spare U10 here is not simple thermal resistance, produce the heat detector spare that exchanges variable signal but vary with temperature, as the temperature-sensitive oscillating device; Mu balanced circuit U1 can be the fixed stably volt circuits of three ends, as 7805,78L05,7812,78L12 etc., also can be the adjustable mu balanced circuit of three ends, as LM317 etc., and also available voltage stabilizing diode etc. certainly; Integrated four high guaily unit U9 and U11 can be LM224, LM324, also can be other interchangeable amplifier models such as 14574B.
Radio microwave sounding unit is according to the range finding of active wireless electricity continuous wave dobla, the frequency modulation range finding, pulse ranging, pulse code range finding or phase ranging principle design, by its day alignment space or detected target direction launching electromagnetic wave, after these electromagnetic waves are run into detected target, receive by receiving antenna, form the information of detected target, detected target can be a vehicle, it also can be other object, human body, animal etc., whether this probe unit also can be rocked itself or move and react, when being rocked or be mobile, it can export corresponding information, the detector that has this probe unit is installed to is detected on the object, the detectable object that is detected has or not to rock or move and takes place.
For a certain track, more reliable in order to obtain, the needs of more detection informations, sniffer of the present invention can be plugged into, and at least one has the sub-sniffer of independent case, constitute split type master and slave type sniffer, as being provided with temperature measuring type earth magnetism harmony/vibration/pressure detection type acquisition of signal module in female sniffer, the Mobyneb signal processing unit, input/output interface module and power supply, be provided with an acquisition of signal module in the sub-sniffer, only be provided with an earth magnetism probe unit in this acquisition of signal module, female sniffer links to each other by lead with sub-sniffer, keeping at a certain distance away is embedded in below the carriageway surfacing, the speed of a motor vehicle of detectable vehicle, vehicle length, vehicle flowrate, whether stop to have vehicle between road occupancy and pavement temperature and female sniffer and the sub-sniffer, information such as down time.For the multilane situation, in order to save the needs of system cost, a female sniffer a plurality of sub-sniffers of plugging into, resulting detectable signal all pass through signal processing unit in female sniffer and output/load module and handle and transmit.
As shown in figure 12, circuit theory diagrams for mother and sons' type sniffer: in female sniffer, power supply is by mu balanced circuit U1, filter capacitor C75, C76 and battery pack E constitute, the acquisition of signal module is by an earth magnetism probe unit T1, sound/vibration/pressure probe unit or microwave sounding unit or ultrasonic listening unit T2, a temperature probe unit T3 constitutes, signal processing unit is by resistance R 107--R121, capacitor C 77--C85, integrated four high guaily unit U12, one-chip computer U7 constitutes, and 5. input/output module is made of standard input/output circuitry assembly I/O and signal input/output unit.Sub-sniffer has three, one is made of earth magnetism probe unit T1, resistance R 122--R126, capacitor C 86--C88, amplifier U13, one is made of earth magnetism probe unit T2, resistance R 127--R131, capacitor C 89--C91, amplifier U14, and another is made of earth magnetism probe unit T3, resistance R 132--R136, capacitor C 92--C94, amplifier U15.Power supply is battery pack or solar battery group power supply, the transducing signal of all probe units is respectively through bandpass filtering with after amplifying, send one-chip computer U7 to carry out Intelligent treatment, I/O I/O and signal input/output unit can be wireless radio transmission assembly or optical cable transmission assembly.
Claims (7)
1, a kind of motor vehicle detector, comprise probe unit, signal Processing/transmission unit and the power supply formed with vehicle earth magnetism reflection detector, power supply is the each several part power supply, it is characterized in that, signal Processing/transmission unit includes amplifier at least, the input end of the output termination signal Processing/transmission unit of vehicle earth magnetism reflection detector, described probe unit also comprises sound/vibration/pressure detector or vehicle ultrasonic detector, and its output terminal is connected with the input end of signal Processing/transmission unit.
2, motor vehicle detector as claimed in claim 1 is characterized in that, described probe unit is provided with a temperature sensing unit, and its output terminal is connected with the input end of signal Processing/transmission unit.
3, motor vehicle detector as claimed in claim 1 is characterized in that, described probe unit is provided with a microwave sounding unit, and its output terminal is connected with the input end of signal Processing/transmission unit.
4, motor vehicle detector as claimed in claim 1, it is characterized in that, described signal Processing/transmission unit also includes microprocessor, the output terminal of every road amplifier and being used to monitors that the power supply output monitoring point of supply voltage monitors that with being used to the monitoring point of amplifying circuit duty is connected with the data acquisition/input bus of microprocessor, and the data bus of radio signal transmission device or fiber-optic signal transmitting device is connected with control bus with the data bus of microprocessor respectively with control bus.
5, motor vehicle detector as claimed in claim 4, it is characterized in that, signal Processing/transmission unit also comprises input/output interface, radio signal transmission device or the fiber-optic signal transmitting device that is used to export vehicle detection information and motor vehicle detector self check information, and the output terminal of amplifier is connected with the input end of radio signal transmission device or fiber-optic signal transmitting device.
As claim 1,2,3,4 or 5 described motor vehicle detectors, it is characterized in that 6, described power supply is accumulator or solar battery group.
7, as claim 1,2,3,4 or 5 described motor vehicle detectors, it is characterized in that, the plug into sub-probe unit of independent case of described signal/transmission processing unit, sub-probe unit comprises at least one vehicle earth magnetism reflection detector, and its output terminal is connected with the input end of signal Processing/transmission unit.
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| Application Number | Priority Date | Filing Date | Title |
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| CNA031261523A CN1549224A (en) | 2003-05-13 | 2003-05-13 | Vehicle detecting apparatus |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNA031261523A CN1549224A (en) | 2003-05-13 | 2003-05-13 | Vehicle detecting apparatus |
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| CN1549224A true CN1549224A (en) | 2004-11-24 |
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| CN100466006C (en) * | 2005-05-17 | 2009-03-04 | 上海申腾信息技术有限公司 | Method for processing parking monitoring system |
| CN100538764C (en) * | 2007-11-28 | 2009-09-09 | 南京莱斯信息技术有限公司 | The multi-position adjuster of intelligent traffic microwave detector |
| CN101297336B (en) * | 2005-10-25 | 2010-06-09 | 秦内蒂克有限公司 | Traffic sensing and monitoring apparatus |
| CN101866556A (en) * | 2010-04-29 | 2010-10-20 | 烟台汽车工程职业学院 | Parking place management system and management method of parking lot |
| CN102034357A (en) * | 2010-12-01 | 2011-04-27 | 北京握奇数据系统有限公司 | Vehicle monitoring device as well as device, system and method for detecting regulation-violating vehicles |
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