CN2700980Y - Ground buried type vehicle integrated detector - Google Patents
Ground buried type vehicle integrated detector Download PDFInfo
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- CN2700980Y CN2700980Y CN 200420010905 CN200420010905U CN2700980Y CN 2700980 Y CN2700980 Y CN 2700980Y CN 200420010905 CN200420010905 CN 200420010905 CN 200420010905 U CN200420010905 U CN 200420010905U CN 2700980 Y CN2700980 Y CN 2700980Y
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Abstract
The utility model discloses a ground buried type vehicle integrated detector which is composed of a metal inductive detecting coil and an oscillator unit of the metal inductive detecting coil, a vehicle geomagnetic mapping detecting unit, a signal discrimination / detection circuit unit, a signal processing / logical processing unit, a signal transformation / transmission interface unit, an electrical power supply and a housing. The utility model can detect vehicle flow capacity, road occupancy rate, vehicle speed, parking time, road heat, etc., and the utility model is broadly applied to monitoring, management and command systems of traffic and vehicle parking lots. The ground buried type vehicle integrated detector has the advantages of low cost, small volume, modularization, high reliability, easy installation, rapidity and free maintenance because of using the fully-enclosed housing buried in ground. The utility model can also be applied to safety alarm and monitoring systems.
Description
Technical field
The utility model relates to a kind of motor vehicle detector, particularly relate to a kind of buried integrated vehicle detector, this device can be used for city or road traffic guidance management system and vehicle static management system, can to vehicles such as vehicle pass-through, the speed of a motor vehicle, vehicle flowrate, road occupying, traffic congestion, berthing times dynamically or the detection of static information be applicable to the monitoring management system of controlling system of traffic light, electronic police photographic system, vehicle toll station system, vehicle doorn access control system, managing system of car parking and road grid traffic etc.
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 and traffic control system, 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 sail through or stop on the large-scale inductive coil, make the inductance value of its coil change, the electric signal that causes the detection circuit output that is made of with other circuit this coil is also along with changing, form the vehicle detection signal, be generally frequency signal, send processor to handle, obtain transport information such as vehicle flowrate, these sniffers exist the vehicle detection mode single, and detection information is not comprehensive, and volume is big, install inconvenient, road pavement is destroyed serious during installation, because shortcomings such as the be full of cracks on road surface easily is damaged.In addition, a kind of permanent type wireless vehicle register that utilizes vehicle magnetic reflection (VMI) commercial measurement vehicle flowrate produced in USA, 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 situation requirement to motor vehicle detector fully.
Summary of the invention
The purpose of this utility model provide a kind of information of vehicles with comprehensive survey ability, detection more comprehensively, motor vehicle detector that volume is little, to solve the deficiency of existing motor vehicle detector.
For achieving the above object, the utility model adopts following technical scheme:
A kind of buried integrated vehicle detector, it is characterized in that, the detection oscillator that it is made of metal induction detecting coil that has magnetic core or coil rack that produces alternating magnetic field and the oscillatory circuit that matches with it, be used for detecting or identify the voltage magnitude of responding to the detecting coil two ends with metal from surveying oscillator, induced current by metal induction detecting coil or survey the signal discriminating/testing circuit unit of at least a information in the relevant information of oscillator oscillation frequency, the output that is used to finish signal discriminating/testing circuit unit is amplified, filtering, shaping, relatively, sensitivity adjustment, signals collecting, signal Processing/the Logical processing unit of at least one work in logic analysis and digital coding and the storage work, signal transformation/transmission interface unit, power supply and housing are formed, power supply is the each several part power supply, survey oscillator and become corresponding electric connection with signal discriminating/testing circuit unit, the plug into input end of signal transformation/transmission interface unit of the plug into respective input of signal Processing/Logical processing unit of the output of signal discriminating/testing circuit unit, the output signal of signal Processing/Logical processing unit.
Above-mentioned buried integrated vehicle detector is characterized in that, signal discriminating/testing circuit unit is made up of wave detector/rectifier and comparer/gate.
Above-mentioned buried integrated vehicle detector, it is characterized in that, signal discriminating/testing circuit unit is made up of the difference frequency type reference oscillator, survey oscillator and difference frequency type reference oscillator formation double frequency self-heterodyne oscillator, the plug into input end of signal Processing/Logical processing unit of the output terminal of self-heterodyne oscillator.
Above-mentioned buried integrated vehicle detector, it is characterized in that, signal discriminating/testing circuit unit is made up of reference oscillator and frequency mixer, the plug into input end of signal Processing/Logical processing unit of the output of surveying oscillator and the reference oscillator respective input of mixer of plugging into respectively, the output terminal of mixer.
Above-mentioned buried integrated vehicle detector, it is characterized in that, signal discriminating/testing circuit unit is made up of reference oscillator, two-way oscillator signal treatment circuit and mixer, the output of surveying oscillator and reference oscillator one road oscillator signal treatment circuit of respectively plugging into, the plug into input end of signal Processing/Logical processing unit of plug into the respectively input end of mixer of oscillator signal treatment circuit, the output terminal of mixer.
Above-mentioned buried integrated vehicle detector, it is characterized in that, signal discriminating/testing circuit unit is made of the superheterodyne signal receiver circuit, it is parallel with the receiving coil of superheterodyne signal receiver circuit near the plug into input end of signal Processing/Logical processing unit of, the output of superheterodyne signal receiver circuit to survey the metal induction detecting coil of oscillator.
Above-mentioned buried integrated vehicle detector, the center that metal induction detecting coil is set with high magnetic conduction is axially arranged with uncovered cavity magnetic core of at least one end or cavity coil rack, be used to be provided with vehicle earth magnetism reflection probe unit in the cavity, vehicle earth magnetism reflection probe unit is for having the vehicle earth magnetism reflection inductive coil or the Hall subassembly of " bar-shaped " magnetic core, be provided with vehicle earth magnetism image signal treatment circuit in signal Processing/Logical processing unit, the signal of vehicle earth magnetism reflection probe unit is exported the respective input of the signal Processing/Logical processing unit of plugging into.
It is to be noted: vehicle earth magnetism reflection probe unit is positioned in the uncovered cavity of metal induction detecting coil magnetic core or in the cavity of coil rack, be metal to be responded to detection circuit function and Effect on Performance for the metallic object of removing in the vehicle earth magnetism reflection probe unit that is provided with in the detector, so not only guarantee metal induction detection circuit energy operate as normal, can also guarantee vehicle earth magnetism reflection detection circuit operate as normal simultaneously.
Above-mentioned buried integrated vehicle detector is provided for the temperature-sensing element and the corresponding processes temperature signal circuit of sensing path surface temperature or this detector temperature in signal Processing/Logical processing unit.
Above-mentioned buried integrated vehicle detector, signal transformation/transmission interface unit is provided with the high-low level/impulse output circuit device that is used for detectable signal output, the audio signal output circuit arrangement, electronic switch on/off output circuit device, collector output circuit device, photoelectricity isolation and transmission circuit device, standard/non-standard communication interface/bus transfer circuit arrangement, at least a output/transmission circuit apparatus in the circuit arrangement of radio communication signal transmission circuit apparatus and the transmission of optical-fibre communications signal, oscillatory circuit, signal discriminating/testing circuit unit, signal Processing/Logical processing unit, the module of different needs is arranged to satisfy in signal transformation/transmission interface unit, or utilizing extensive analog/digital integrated circuit or little processing one-chip computer that corresponding circuit unit function is organically comprehensively made half integrated or integrated circuit module, circuit module and circuit board are arranged in the housing or they partly or entirely are arranged in the center cavity of metal induction detecting coil magnetic core or in the cavity of coil rack.Metal induction detecting coil is made of one group of coil or is connected in series by many groups coil and is sleeved on same magnetic core and forms, metal induction detecting coil magnetic core can be coil outside open " magnetic tube shape ", " bar magnet shape ", " magnetic cylindricality ", " drum shape " or " magnetic jar shape ", also can or the needs of vehicle earth magnetism reflection probe unit and circuit board be set according to the needs of detection sensitivity, comprehensive above-mentioned shape is made into " synthetic geometry shape " metal induction detecting coil magnetic core of multistage butt joint.
It is to be noted: circuit module and circuit board are positioned in the cavity of metal induction detecting coil magnetic core, be for the influence of the metallic object in as often as possible dispel power down road module and the circuit board, vehicle detector is worked better metal induction detection circuit sensitivity and detection performance thereof.
Above-mentioned buried integrated vehicle detector, power supply is wired power supply, accumulator or the solar battery group with mu balanced circuit, the profile that has the metal induction detecting coil of magnetic core is cylindrical, housing is that the whole plastic packaging of removable stand alone type or detector assembly becomes form, and its profile is cylindrical or oblate.
Principle of work of the present utility model: owing to vehicle chassis is made by the bigger hardware of a large amount of volumes,
When vehicle sail through or when resting in the detector place that is embedded in the road surface, the metal induction detecting coil of surveying oscillator produces alternating magnetic field can make the hardware of vehicle chassis produce the eddy current of inducting because of electromagnetic induction phenomenon, the electromagnetic field of eddy current of inducting will be revolted the variation of former alternating electromagnetic field, thereby the oscillating current of former generation alternating electromagnetic field is all changed to some extent in amplitude with on the cycle, distance is near more, oscillating current amplitude and change on the cycle many more, the magnitude of current of this change, frequency or corresponding detecting circuit be through after the suitable processing, can be used to realize the detection to dealing vehicle or parked vehicles on the track; Moving when passing through detector when vehicle in addition, near the absolute force of detector is changed, form vehicle earth magnetism reflection, can utilize the vehicle earth magnetism reflection inductive coil or the high sensitivity earth magnetism Hall subassembly of magnetic intensity variation in the sensing, realize detection dealing vehicle on the track.
The utility model mainly by two kinds of detection modes of metal detection and vehicle earth magnetism reflection can sample respectively vehicle sail through or signal when stopping, to amplitude, frequency, phase place, width or the time domain specification of these signals handle, information such as analysis-by-synthesis obtains vehicle flowrate, road occupancy, the speed of a motor vehicle, down time, vehicle length.Reach the purpose that detection information is learnt from other's strong points to offset one's weaknesses, improved antijamming capability and to the reliability and the accuracy of vehicle detection, therefore increase the quantity of information of sniffer simultaneously, can satisfy the needs of different application scenarios and field, different technical requirement, different detection purpose better.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.Detector volume of the present utility model 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 utility model is applicable to large, medium and small urban transportation commander and management system, regional traffic information network system and managing system of car parking; Be 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, also be applicable in security monitoring, the warning system to vehicle.
Description of drawings
Fig. 1 is the main cut-open view of the utility model embodiment 1.
Fig. 2 is the vertical view of the utility model embodiment 1.
Fig. 3 is the circuit diagram of the utility model embodiment 1.
Fig. 4 is the main cut-open view of the utility model embodiment 2.
Fig. 5 is the circuit diagram of the utility model embodiment 2.
Fig. 6 is the main cut-open view of the utility model embodiment 3.
Fig. 7 is the vertical view of the utility model embodiment 3.
Fig. 8 is the circuit diagram of the utility model embodiment 3.
Fig. 9 is the main cut-open view of the utility model embodiment 4.
Figure 10 is the circuit diagram of the utility model embodiment 4.
Figure 11 is the main cut-open view of the utility model embodiment 5.
Figure 12 is the circuit diagram of the utility model embodiment 5.
Figure 13 is the main cut-open view of the utility model embodiment 6.
Figure 14 is the circuit diagram of the utility model embodiment 6.
Figure 15 is the main cut-open view of the utility model embodiment 7.
Figure 16 is the circuit diagram of the utility model embodiment 7.
Embodiment
As shown in Figure 1, 2, the detector of present embodiment is responded to detecting coil (4), metal induction detecting coil magnetic core (5), circuit module wiring board (7), power lead and signal output cable (10), plastic casing body (11) and plastic casing lid (12) by metal and is formed.Metal induction detecting coil (4) installs around the hypomere at " tubular " metal induction detecting coil magnetic core (5) of high magnetic conduction, in the internal cavity of magnetic core (5) center circuit module wiring board (7) is set, metal induction detecting coil (4) by its extension line (6) be connected with circuit module wiring board (7), power lead and signal output cable (10) be connected with circuit module wiring board (7) by plastic casing (11,12).Circuit module wiring board (7) comprises metal induction detection pierce circuit unit, detector circuit unit, comparator circuit unit, signal Processing/Logical processing unit, signal transformation/transmission interface unit and power supply unit of voltage regulation.
Be illustrated in figure 3 as the circuit diagram of present embodiment 1, U1 is the three-terminal voltage-stabilizing circuit, and U1 and C1, C2, C3 constitute power supply unit of voltage regulation, 1. be power supply just, 2. be power supply ground; U2 is inductive switch integrated circuit TDA0161D, TDA0161D inside is integrated with pierce circuit unit, detector circuit unit, comparator circuit unit and variable constant current source circuit etc., L1 is a metal induction detecting coil (4), and L1, C4, C5, R1 and TDA0161D internal oscillator circuit unit constitute surveys oscillator; Variohm R2 is used for the detection sensitivity adjustment as signal processing circuit; R3, Q1 constitute signal transformation/transmission interface unit that 3. collector is exported; 3. or 4. 5. signal transformation/transmission interface unit (shown in the double dot dash line) of output of on/off RO, electronic switch K also can be set, form level.
When the detector place that is embedded in the road surface do not have vehicle sail through or when stopping, L1, C4, C5, R1 constitute detection oscillator operate as normal with TDA0161D internal oscillator circuit unit; The 6 pin low levels of U2, Q1 ends; Or electronic switch K is failure to actuate, is in the normal state.
When vehicle sail through or when resting in the detector place that is embedded in the road surface, metal induction detecting coil L1 produces alternating magnetic field can make the hardware of vehicle chassis produce the eddy current of inducting because of electromagnetic induction phenomenon, the electromagnetic field of eddy current of inducting will be revolted the variation of former alternating electromagnetic field, thereby the oscillating current on the L1 of former generation alternating electromagnetic field is all changed to some extent in amplitude with on the cycle, distance is near more, oscillating current amplitude and on the cycle variable quantity big more, when vehicle ' arrives the detector top, 6 pin of U2 become high level by low level, the Q1 conducting; Or electronic switch K action.
As shown in Figure 4, the detector of present embodiment is made up of vehicle earth magnetism reflection inductive coil (1), vehicle earth magnetism reflection inductive coil magnetic core (2), metal induction detecting coil (4), metal induction detecting coil magnetic core (5), No. 1 circuit module wiring board (17), wiring board connecting line (8), No. 2 circuit module wiring boards (19), power lead and signal output cable (10), plastic casing body (11) and plastic casing lid (12).Metal induction detecting coil (4) installs around the hypomere at " tubular " metal induction detecting coil magnetic core (5) of high magnetic conduction, magnetic core (5) central shaft to the epimere of through hole shape internal cavity vehicle earth magnetism reflection inductive coil (1) is set, be provided with " bar-shaped " magnetic core (2) in the coil (1), magnetic core (5) central shaft to the hypomere of through hole shape internal cavity No. 1 circuit module wiring board (17) and No. 2 circuit module wiring boards (19) are set, wiring board (17) and wiring board (19) are electrically connected by wiring board connecting line (8), and vehicle earth magnetism reflection inductive coil (1) and metal induction detecting coil (4) are respectively by its corresponding extension line (3), extension line (6) and circuit module wiring board (17,19) be connected, power lead and signal output cable (10) are by plastic casing (11,12) with circuit module wiring board (17,19) be connected.No. 1 circuit module wiring board (17) comprises pierce circuit unit, detector circuit unit and the comparator circuit unit of metal induction detection, the signal processing circuit that the induction of vehicle earth magnetism reflection is surveyed, also comprise the microprocessor microcontroller and the peripheral components circuit thereof that the two-way detectable signal are carried out signals collecting, data processing and storage, No. 2 circuit module wiring boards (19) comprise power supply unit of voltage regulation and transmission interface unit, and the transmission interface unit is the standard form transmission interface.
Be illustrated in figure 5 as the circuit diagram of present embodiment, U1 is the three-terminal voltage-stabilizing circuit, and U1 and C1, C2, C3 constitute power supply unit of voltage regulation; U2 is inductive switch integrated circuit TDA0161D, TDA0161D inside is integrated with pierce circuit unit, detector circuit unit, comparator circuit unit and variable constant current source circuit etc., L1 is a metal induction detecting coil (4), and L1, C4, C5, R1 and TDA0161D internal oscillator circuit unit constitute the metal detection oscillator; U3 is 4 amplifiers, L2 is vehicle earth magnetism reflection inductive coil (1), and L2, U3-1, U3-2, U3-3, C7, C8, C9, C10, C11, C12, R4, R5, R6, R7, R8, R9, R10 and R11 constitute the induction of vehicle earth magnetism reflection and survey and signal processing circuit; U4 is the intelligent logical processing unit that main devices constitutes, the two-way detectable signal carried out signals collecting, data analysis and processing and storage with the microprocessor microcontroller; I/O is standard form transmission interface unit; 1. be power supply just, 2. be power supply ground, 3. be data line.
When the detector place that is embedded in the road surface do not have vehicle sail through or when stopping, L1, C4, C5, R1 and TDA0161D internal oscillator circuit unit constitute surveys the oscillator operate as normal, vehicle earth magnetism reflection inductive coil L2 two ends do not have induced voltage signal yet simultaneously, and detector is in the normal state.
When vehicle sail through or when resting in the detector place that is embedded in the road surface, metal induction detecting coil L1 produces alternating magnetic field can make the hardware of vehicle chassis produce the eddy current of inducting because of electromagnetic induction phenomenon, the electromagnetic field of eddy current of inducting will be revolted the variation of former alternating electromagnetic field, thereby the oscillating current on the L1 of former generation alternating electromagnetic field is all changed to some extent in amplitude with on the cycle, distance is near more, oscillating current amplitude and on the cycle variable quantity big more, when vehicle ' arrived the detector top, 6 pin of U2 had low level to become high level; Simultaneously when vehicle sail through, when being toward or away from the detector that is embedded in the road surface, there is induced voltage signal at vehicle earth magnetism reflection inductive coil L2 two ends, the output pin of U3-3 has pulse signal output; U4 carries out signals collecting, data analysis and processing to two paths of signals, obtains result of detection and control command, afterwards result of detection is stored, or delivers to I/O standard form data-interface and be transferred to other device and system, or control the work of corresponding topworks.
Shown in Fig. 6,7,8, the detector difference from Example 2 of present embodiment is, be provided with pavement temperature sensing element (13), replaced vehicle earth magnetism reflection inductive coil L2 (1) by the earth magnetism reflection sensing Hall subassembly H (15) that has " bar magnet " collection chinaware, power supply adopts high-energy battery E power supply, and the transmission interface unit is provided with radio communication output module (21) and antenna T (22).U4 carries out signal collection in real time, data analysis and processing to three road signals, obtain result of detection or control command, the line data of going forward side by side coding or geocoding, afterwards result of detection is stored, or through I/O by wire transmission 3. mode or wireless transmission T mode deliver to and be transferred to other device and system, or control the work of corresponding topworks.
As shown in Figure 9, the detector of present embodiment is responded to detecting coil (4), metal induction detecting coil magnetic core (5), circuit module wiring board (7), power lead and signal output cable (10), plastic casing body (11) and plastic casing lid (12) by metal and is formed.Metal induction detecting coil (4) is close on " tubular " metal induction detecting coil magnetic core (5) of high magnetic conduction, in the internal cavity of magnetic core (5) center circuit module wiring board (7) is set, metal induction detecting coil (4) by its extension line (6) be connected with circuit module wiring board (7), power lead and signal output cable (10) be connected with circuit module wiring board (7) by plastic casing (11,12).Circuit module wiring board (7) comprises metal induction detection pierce circuit unit, difference frequency type reference oscillator, signal transformation/transmission interface unit and power supply unit of voltage regulation.
Be the circuit diagram of present embodiment as shown in figure 10, U1 is three-terminal voltage-stabilizing circuit 78LXX, and U1 and C1, C2, C3 constitute power supply unit of voltage regulation, 1. be power supply just, 2. be power supply ground; With Q1, Q2, L1 and C4 is the main detection oscillator that constitutes; With Q1, Q3, L2 and C6 is the main difference frequency type reference oscillator that constitutes; Variohm R6 is used for the detection sensitivity adjustment as signal processing circuit; IC is a LM386 audio frequency amplification circuit, with 3. constituting signal transformation/transmission interface unit.
When the detector place that is embedded in the road surface do not have vehicle sail through or when stopping, the frequency of operation of surveying oscillator is identical with the frequency of operation of difference frequency type reference oscillator, 3. the emitter absence of audio signal output of Q3 hold no signal to export.
When vehicle sail through or when resting in the detector place that is embedded in the road surface, the frequency of operation of surveying oscillator changes, and difference is arranged, sound signal of emitter output of Q3 with the frequency of operation of difference frequency type reference oscillator, after IC amplifies, 3. holding sound signal of output.
Shown in Figure 11,12, the detector of present embodiment is made up of vehicle earth magnetism reflection inductive coil (1), vehicle earth magnetism reflection inductive coil magnetic core (2), metal induction detecting coil (4), metal induction detecting coil magnetic core (5), No. 1 circuit module wiring board (17), wiring board connecting line (8), No. 2 circuit module wiring boards (19), power lead and signal output cable (10), plastic casing body (11) and plastic casing lid (12).Metal induction detecting coil (4) is close on " tubular " metal induction detecting coil magnetic core (5) of high magnetic conduction, magnetic core (5) central shaft to the epimere of through hole shape internal cavity vehicle earth magnetism reflection inductive coil (1) is set, be provided with " bar-shaped " magnetic core (2) in the coil (1), magnetic core (5) central shaft to the hypomere of through hole shape internal cavity No. 1 circuit module wiring board (17) and No. 2 circuit module wiring boards (19) are set, wiring board (17) and wiring board (19) are electrically connected by wiring board connecting line (8), and vehicle earth magnetism reflection inductive coil (1) and metal induction detecting coil (4) are respectively by its corresponding extension line (3), extension line (6) and circuit module wiring board (17,19) be connected, power lead and signal output cable (10) are by plastic casing (11,12) with circuit module wiring board (17,19) be connected.No. 1 circuit module wiring board (17) comprises the signal processing circuit that metal induction detection oscillator, reference oscillator, frequency mixer, the induction of vehicle earth magnetism reflection are surveyed, the microprocessor microcontroller and the peripheral components circuit thereof that the two-way detectable signal are carried out signals collecting, data processing and storage; No. 2 circuit module wiring boards (19) comprise power supply unit of voltage regulation and transmission interface unit, and 3. 2. 1. the transmission interface unit be the standard form transmission interface.
Be the circuit diagram of present embodiment as shown in figure 12, U1 is three-terminal voltage-stabilizing circuit 78LXX, and U1 and C1, C2, C3 constitute power supply unit of voltage regulation; U2, U3 are 555 time-base integrated circuits, and L1 is a metal induction detecting coil (4), and L1, U2, C4, R12 constitute the metal detection oscillator, and L2 is fixed inductor with colour codes, and L2, U3, C6, R13 constitute reference oscillator; D3, Q1, R14, R15 and R16 constitute frequency mixer, U4 is 4 amplifiers, L3 is vehicle earth magnetism reflection inductive coil, and L3, U4-1, U4-2, U4-3, C8, C9, C10, C11, C12, R4, R5, R6, R7, R8, R9, R10 and R11 constitute the induction of vehicle earth magnetism reflection and survey and signal processing circuit; U5 is the intelligent logical processing unit that main devices constitutes, the two-way detectable signal carried out signals collecting, data analysis and processing and storage with the microprocessor microcontroller; I/O is standard form transmission interface unit: 1. for power supply just, 2. be power supply ground, 3. be data line.
When the detector place that is embedded in the road surface do not have vehicle sail through or when stopping, survey the frequency of operation of oscillator and the frequency of operation of reference oscillator the one difference f that sets is arranged, sound signal that frequency is f of emitter output of Q1, there is not induced voltage signal on the vehicle earth magnetism reflection inductive coil L3 simultaneously, after U5 data acquisition, analysis and judgement, provide the result that no vehicle crosses or stops.
When vehicle sail through or when resting in the detector place that is embedded in the road surface, the frequency of operation of the surveying oscillator Δ f that can change, the difference of it and reference oscillator frequency of operation can be along with the Δ f that changes, sound signal that frequency is f+ Δ f of the emitter of Q1 output; When vehicle sail through, when being toward or away from the detector that is embedded in the road surface, there is induced voltage signal at vehicle earth magnetism reflection inductive coil L3 two ends, the output pin of U3-3 has pulse signal output; U5 carries out signals collecting, data analysis and processing to two paths of signals, obtain result of detection and control command, afterwards result of detection is stored, or deliver to I/O standard form data-interface (RS-232,485, I2C or IEEE488 etc.) and be transferred to other device and system, or control the work of corresponding topworks.
As shown in figure 13, the detector of present embodiment is responded to detecting coil (4), metal induction detecting coil skeleton (25), circuit module wiring board (7), power lead and signal output cable (10), plastic casing body (11) and plastic casing lid (12) by metal and is formed.Metal induction detecting coil (4) is on skeleton (25), in skeleton (25) internal cavity circuit module wiring board (7) is set, metal induction detecting coil (4) by its extension line (6) be connected with circuit module wiring board (7), power lead and signal output cable (10) be connected with circuit module wiring board (7) by plastic casing (11,12).Circuit module wiring board (7) comprises metal induction detection oscillator, reference oscillator, two-way oscillator signal treatment circuit, frequency mixer, signal Processing/Logical processing unit, signal transformation/transmission interface unit and power supply unit of voltage regulation.
Be the circuit diagram of present embodiment as shown in figure 14, C12, C13 constitute the mu balanced circuit unit, 1. be power supply just, be power supply ground 2., R8 is used for current limliting, C9 is used to power filter, burr; It serves as main formation with Q1, L1, C1, C2, C3, C4, R2, R3 and R4 that oscillator is surveyed in the metal induction; Reference oscillator serves as main formation with Q2, L2, C5, C6, C7, C8, R3, R4 and R5; IC is six ungated integrated circuits, two-way oscillator signal treatment circuit, and a route IC-1, IC-2, IC-3, R6, R9, R11 and C10 constitute, and a route IC-4, IC-5, IC-6, R7, R10, R12 and C11 constitute; Frequency mixer, signal Processing/logical process and signal transformation/transmission interface unit is reached by D, R11, R12, R13, R14, C14 and field effect transistor QF and 3. comprehensively constitutes.
After the energized, the frequency of operation of surveying oscillator is identical with the frequency of operation of reference oscillator, the collector of Q1 and Q2 is exported a sine-wave oscillation signal that frequency is identical respectively, two signals become two frequency square-wave signals that phase place is opposite with amplitude is identical through oscillator signal treatment circuit separately, deliver to the grid of QF again after R11, R12 and D mixing.
When the detector place that is embedded in the road surface do not have vehicle sail through or when stopping, the voltage of the grid of QF is lower than the grid threshold voltage, QF does not work, 3. end output high level; When vehicle sail through or when resting in the detector place that is embedded in the road surface, the frequency of operation of surveying oscillator can change, and can make the voltage of the grid of QF be higher than the grid threshold voltage, QF work, 3. Duan output level can change thereupon.
Shown in Figure 15,16, the detector of present embodiment is responded to detecting coil (4), metal induction detecting coil magnetic core (5), circuit module wiring board (7), power lead and signal output cable (10), plastic casing body (11) and plastic casing lid (12) by metal and is formed.Metal induction detecting coil (4) is flat on magnetic core (5), the 1/4 place tap of metal induction detecting coil (4), be connected with circuit module wiring board (7) by its extension line (6), the receiving coil of AM receiver tuned circuit (24,34) is flat on magnetic core (35), receiving coil (24,34) and metal induction detecting coil (4) parallel near, power lead and signal output cable (10) are connected with circuit module wiring board (7) by plastic casing (11,12).Circuit module wiring board (7) comprises LC single-tube oscillator circuit, monolithic superhet AM receiver IC circuit and RCL peripheral cell and stabilized voltage supply.
Be the circuit diagram of present embodiment as shown in figure 16, U1 is the three-terminal voltage-stabilizing circuit, and U1 and C1, C2, C3 constitute power supply unit of voltage regulation, 1. be power supply just, 2. be power supply ground; The metal induction is surveyed oscillator and is made of Q, L1-1, L1-2, C4, C5, C6 and R1; IC is monolithic superhet AM receiver circuit AN7222, RCL is the peripheral circuit of monolithic superhet AM receiver circuit AN7222, the superheterodyne signal receiver circuit is made of IC, tuned circuit (L2, L3, C7, C8), local oscillation circuit (B, C11) and RCL, detector is output as 13 ends of AN7222, is connected to 3..
When the detector place that is embedded in the road surface do not have vehicle sail through or when stopping, the 3. sound signal of end output one fixed frequency; When vehicle sail through or when resting in the detector place that is embedded in the road surface, 3. the frequency of the sound signal of end output changes thereupon.
Claims (10)
1, a kind of buried integrated vehicle detector, it is characterized in that, the detection oscillator that it is made of metal induction detecting coil that has magnetic core or coil rack that produces alternating magnetic field and the oscillatory circuit that matches with it, be used for detecting or identify the voltage magnitude of responding to the detecting coil two ends with metal from surveying oscillator, induced current by metal induction detecting coil or survey the signal discriminating/testing circuit unit of at least a information in the relevant information of oscillator oscillation frequency, be used to finish signal discriminating/testing circuit unit output is amplified, filtering, shaping, relatively, sensitivity adjustment, signals collecting, signal Processing/the Logical processing unit of at least one work in logic analysis and digital coding and the storage work, signal transformation/transmission interface unit, power supply and housing are formed, power supply is the each several part power supply, survey oscillator and become corresponding electric connection with signal discriminating/testing circuit unit, the plug into input end of signal transformation/transmission interface unit of the plug into respective input of signal Processing/Logical processing unit of the output of signal discriminating/testing circuit unit, the output signal of signal Processing/Logical processing unit.
2, buried integrated vehicle detector as claimed in claim 1 is characterized in that, signal discriminating/testing circuit unit is made up of wave detector/rectifier and comparer/gate.
3, buried integrated vehicle detector as claimed in claim 1, it is characterized in that, signal discriminating/testing circuit unit is made up of the difference frequency type reference oscillator, survey oscillator and difference frequency type reference oscillator formation double frequency self-heterodyne oscillator, the plug into input end of signal Processing/Logical processing unit of the output terminal of self-heterodyne oscillator.
4, buried integrated vehicle detector as claimed in claim 1, it is characterized in that, signal discriminating/testing circuit unit is made up of reference oscillator and frequency mixer, the plug into input end of signal Processing/Logical processing unit of the output of surveying oscillator and the reference oscillator respective input of mixer of plugging into respectively, the output terminal of mixer.
5, buried integrated vehicle detector as claimed in claim 1, it is characterized in that, signal discriminating/testing circuit unit is made up of reference oscillator, two-way oscillator signal treatment circuit and mixer, the output of surveying oscillator and reference oscillator one road oscillator signal treatment circuit of respectively plugging into, the plug into input end of signal Processing/Logical processing unit of plug into the respectively input end of mixer of oscillator signal treatment circuit, the output terminal of mixer.
6, buried integrated vehicle detector as claimed in claim 1, it is characterized in that, signal discriminating/testing circuit unit is made of the superheterodyne signal receiver circuit, it is parallel with the receiving coil of superheterodyne signal receiver circuit near the plug into input end of signal Processing/Logical processing unit of, the output of superheterodyne signal receiver circuit to survey the metal induction detecting coil of oscillator.
7, as claim 1,2,3,4,5 or 6 described buried integrated vehicle detectors, it is characterized in that, the center that metal induction detecting coil is set with high magnetic conduction is axially arranged with uncovered cavity magnetic core of at least one end or cavity coil rack, be used to be provided with vehicle earth magnetism reflection probe unit in the cavity, vehicle earth magnetism reflection probe unit is for having the vehicle earth magnetism reflection inductive coil or the Hall subassembly of " bar-shaped " magnetic core, be provided with vehicle earth magnetism image signal treatment circuit in signal Processing/Logical processing unit, the signal of vehicle earth magnetism reflection probe unit is exported the respective input of the signal Processing/Logical processing unit of plugging into.
8, as claim 1,2,3,4,5 or 6 described buried integrated vehicle detectors, it is characterized in that, be provided for the temperature-sensing element and the corresponding processes temperature signal circuit of sensing path surface temperature or this detector temperature in signal Processing/Logical processing unit.
9, as claim 1,2,3,4,5 or 6 described buried integrated vehicle detectors, it is characterized in that, signal transformation/transmission interface unit is provided with the high-low level/impulse output circuit device that is used for detectable signal output, the audio signal output circuit arrangement, electronic switch on/off output circuit device, collector output circuit device, photoelectricity isolation and transmission circuit device, standard/non-standard communication interface/bus transfer circuit arrangement, at least a output/transmission circuit apparatus in the circuit arrangement of radio communication signal transmission circuit apparatus and the transmission of optical-fibre communications signal, oscillatory circuit, signal discriminating/testing circuit unit, signal Processing/Logical processing unit, the module of different needs is arranged to satisfy in signal transformation/transmission interface unit, or utilizing extensive analog/digital integrated circuit or little processing one-chip computer that corresponding circuit unit function is organically comprehensively made half integrated or integrated circuit module, circuit module and circuit board are arranged in the housing or they partly or entirely are arranged in the center cavity of metal induction detecting coil magnetic core or in the cavity of coil rack.Metal induction detecting coil is made of one group of coil or is connected in series by many groups coil and is sleeved on same magnetic core and forms, metal induction detecting coil magnetic core can be coil outside open " magnetic tube shape ", " bar magnet shape ", " magnetic cylindricality ", " drum shape " or " magnetic jar shape ", also can or the needs of vehicle earth magnetism reflection probe unit and circuit board be set according to the needs of detection sensitivity, comprehensive above-mentioned shape is made into " synthetic geometry shape " metal induction detecting coil magnetic core of multistage butt joint.
10, as claim 1,2,3,4,5 or 6 described buried integrated vehicle detectors, it is characterized in that, power supply is wired power supply, accumulator or the solar battery group with mu balanced circuit, the profile that has the metal induction detecting coil of magnetic core is cylindrical, housing is that the whole plastic packaging of removable stand alone type or detector assembly becomes form, and its profile is cylindrical or oblate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420010905 CN2700980Y (en) | 2004-05-28 | 2004-05-28 | Ground buried type vehicle integrated detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420010905 CN2700980Y (en) | 2004-05-28 | 2004-05-28 | Ground buried type vehicle integrated detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2700980Y true CN2700980Y (en) | 2005-05-18 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420010905 Expired - Fee Related CN2700980Y (en) | 2004-05-28 | 2004-05-28 | Ground buried type vehicle integrated detector |
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| Country | Link |
|---|---|
| CN (1) | CN2700980Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012174745A1 (en) * | 2011-06-24 | 2012-12-27 | Siemens Aktiengesellschaft | Apparatus used for detecting metal, metal detection apparatus and method, and vehicle detector |
-
2004
- 2004-05-28 CN CN 200420010905 patent/CN2700980Y/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2012174745A1 (en) * | 2011-06-24 | 2012-12-27 | Siemens Aktiengesellschaft | Apparatus used for detecting metal, metal detection apparatus and method, and vehicle detector |
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Granted publication date: 20050518 |