CN202422424U - Passive infrared microwave double-technology vehicle flow detecting device - Google Patents
Passive infrared microwave double-technology vehicle flow detecting device Download PDFInfo
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- CN202422424U CN202422424U CN2012200251148U CN201220025114U CN202422424U CN 202422424 U CN202422424 U CN 202422424U CN 2012200251148 U CN2012200251148 U CN 2012200251148U CN 201220025114 U CN201220025114 U CN 201220025114U CN 202422424 U CN202422424 U CN 202422424U
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Abstract
The utility model relates to a passive infrared microwave double-technology vehicle flow detecting device and belongs to the fields of infrared detection and microwave detection. The vehicle flow detecting device comprises a controller, and a double-element pyroelectric infrared detector and a microwave detector which are respectively connected with the controller, wherein the double-element pyroelectric infrared detector and the microwave detector are connected through an and gate. The vehicle flow detecting device has the following benefits that: by the combination of infrared and microwave detection technologies, only when the two detectors detect that a vehicle passes through a covered area, a system can record the passing of the vehicle and the vehicle flow and traveling directions are calculated and recorded by the controller. The vehicle flow detecting device is compact in structure, can realize routine detection on distance and vehicle models, and well solve the problems such as big detection error, troublesome installation construction and poor interference resistance in the existing ultrasonic wave, ground sensing coils, infrared radiation technologies and the like, aiming at different environments.
Description
Technical field
The utility model is to belong to infrared detection field and Microwave Measurement field, particularly the two mirror of the passive infrared microwave of intelligent parking lot management domain vehicle Flow Detection device.
Background technology
Induce in the field at intelligent transportation field and parking lot, need in time to gather the vehicle flowrate data and the wagon flow direction of gateway, parking lot, maximum technology of usefulness was ground induction coil technology, technological, the infrared correlation technology of earth induction and ultrasonic listening technology etc. in the past; These technological comparative maturities; But shortcoming is obvious, and is too big such as device volume, installation inconvenience; Acquisition precision is low, poor anti jamming capability etc.
Wherein: ground induction coil vehicle Flow Detection device is the flow direction and the flow that detects automobile through two ground induction coils at a distance of about 2 meters.Shortcoming is: the construction trouble, cutting damage ground, and accuracy of detection is poor, receives the interference of bicycle, shopping cart etc. easily, is damaged by pressure by full-sized car easily, and equipment life is short, and is difficult in maintenance.
The earth induction sniffer adopts the earth induction technology, and volume is little, the installation that can be close to the ground, and installation is convenient.Shortcoming is: because the automobile magnetization configuration is complicated, cause accuracy of detection not high, often take place a car through the time detect a plurality of polarity saltus steps, think many cars by mistake, false detection probability is too high.Also has the shortcoming of being damaged by pressure, raining and intake by full-sized car easily.
Infrared correlation vehicle Flow Detection device utilizes one group of infrared correlation probe separated by a distance, when automobile through out-of-date, the blocking-up infrared light, thus judge the flow direction and the flow of automobile, this device is installed in the both sides in track, it is simple relatively, easy to maintenance to construct.Shortcoming is, infrared correlation detects can't distinguish passing through of people and car amount, also can't detect with car (very near pass through of the spacing more than two), and accuracy of detection is too low, and device volume is bigger, and installation is also apparent to bother.
The principle of work of ultrasonic array sniffer is based on the Doppler effect of sound wave, the main directly reflective detecting pattern that adopts.Device is through two ultrasonic probes at a distance of about 2 meters, and it is current to get on the car in the detection track, and accuracy of detection is high.Shortcoming is, can only be used for the parking garage, receives the interference of wind easily, and volume is bigger.Be lifted on track central authorities, installation and maintenance are simpler than above three kinds of equipment, but installation and maintenance will be avoided wagon flow.The covering lane width is limited, and when the track is wide, or automobile is when adjacent lane drives in the wrong direction, and then accuracy of detection can reduce.The supersonic array in two adjacent tracks interferes with each other easily.
The utility model content
The purpose of the utility model is in order to overcome high to environmental requirement in the existing vehicle Flow Detection technology, and error is big, and volume is big; Shortcomings such as inconvenient installation; The two mirror of a kind of passive infrared microwave vehicle Flow Detection device is provided, and this device is integrated the passive infrared detection technology and is carried out vehicle Flow Detection with the microwave sounding technology, reaches the detection of vehicle flowrate and travel direction; This device accuracy in detection and sensitivity are higher, and Installation and Debugging are convenient.The extension wall is installed, and construction and debugging are convenient, do not receive the influence of wagon flow.
The two mirror of a kind of passive infrared microwave that the utility model proposes vehicle Flow Detection device is characterized in that this device comprises controller, the double base rpyroelectric infrared detecting device and the microwave detector that link to each other with controller respectively; Adopt between double base rpyroelectric infrared detecting device and the microwave detector with door and be connected.
Said double base rpyroelectric infrared detecting device is mainly amplified by one group of Fresnel Lenses assembly, two thermoelectric type infrared sensors, signal and treatment circuit is formed; Wherein two thermoelectric type infrared sensors are connected with signal amplification and treatment circuit respectively; Signal amplification and treatment circuit are connected with controller.
Said microwave detector mainly is made up of antenna, transmitting-receiving subassembly, linear modulation unit, intermediate frequency amplifier, signal processor; Wherein antenna is connected with transmitting-receiving subassembly is two-way, and transmitting-receiving subassembly is connected with linear modulation unit, intermediate frequency amplifier respectively, and intermediate frequency amplifier is connected with signal processor; Signal processor is connected with controller.
Characteristics of the utility model and beneficial effect:
This device is through integrating infrared and two kinds of different detection techniques of microwave, have only automobile that two kinds of detecting devices detect the overlay area simultaneously through the time, just can record, and utilize controller to calculate vehicle flowrate and judgement vehicle traveling direction.Can effectively avoid of the prior art high to environmental requirement, error is big, deficiencies such as inconvenient installation.
Compare with existing apparatus, this device volume is littler, can be integrated in the casing of an A4 size,,
Can be used for two-way traffic and bicycle road and detect (be generally the one-in-and-one-out binary channels, single channel also can detect), do not require the division track of using isolation pile strict, a device both can detect admission vehicle flowrate and pull-out vehicle flow, and uploaded data in real time.
Description of drawings
Fig. 1 the utility model be the cut-away view of the two mirror of passive infrared microwave vehicle Flow Detection devices
Fig. 2 the utility model be the work of the two mirror of passive infrared microwave vehicle Flow Detection devices the time, the vertical view of the search coverage that Fresnel Lenses and microwave form
Fig. 3 the utility model be the work of the two mirror of passive infrared microwave vehicle Flow Detection devices the time, the front elevation of the search coverage that Fresnel Lenses and microwave form
Embodiment
The two mirror of a kind of passive infrared microwave that the utility model provides vehicle Flow Detection apparatus structure is as shown in Figure 1, it is characterized in that this device comprises controller, the double base rpyroelectric infrared detecting device and the microwave detector that link to each other with controller respectively; Adopt between double base rpyroelectric infrared detecting device and the microwave detector with door to be connected, realized the current quantity of automobile and the identification of direction, and the interference of passing through such as eliminating pedestrian, bicycle.
The embodiment of each parts of the utility model specifies as follows:
Double base rpyroelectric infrared detecting device is mainly amplified by one group of Fresnel Lenses assembly, two thermoelectric type infrared sensors, signal and treatment circuit is formed; Wherein two thermoelectric type infrared sensor a and b amplify with signal respectively and treatment circuit is connected; Signal amplification and treatment circuit are connected with controller.
Double base rpyroelectric infrared detecting device improves your lens of luxuriant and rich with fragrance mud on the basis of the conventional double base curtain detecting device that is used for security protection; Make surveyed area become two discontinuous surveyed areas; Angle between two detection zones is 15 degree, is used for the judgement of vehicle traveling direction and the identification of interference such as human body, bicycle.
The principle of work of this double base rpyroelectric infrared detecting device is as shown in Figure 1; The infrared ray that the object radiation that the Fresnel Lenses assembly will pass through goes out successively focuses among the pyroelectric infrared sensor a and pyroelectric infrared sensor b among Fig. 1; Pyroelectric infrared sensor produces corresponding electric signal; By signal amplification and treatment circuit among Fig. 1 the identification of vehicle traveling direction is accomplished in information processing, pedestrian and automobile are differentiated.
Microwave detector mainly is made up of antenna, transmitting-receiving subassembly, linear modulation unit, intermediate frequency amplifier, signal processor; Wherein antenna is connected with transmitting-receiving subassembly is two-way, and transmitting-receiving subassembly is connected with linear modulation unit, intermediate frequency amplifier respectively, and intermediate frequency amplifier is connected with signal processor; Signal processor is connected with controller.
Microwave detector adopts the conventional products of the millimeter wave of 35GHZ, and its principle is: produce adjustable triangular wave by the linear modulation unit, be input to transmitting-receiving subassembly; Produce a frequency by the millimeter-wave signal that the triangular wave rule changes by transmitting-receiving subassembly, launch, run into automobile and return again receiving by antenna from antenna; After the Signal Spacing of transmitting-receiving subassembly and emission, through intermediate frequency amplifier, the entering signal processor; By the identification of signal processor completion vehicle traveling direction, pedestrian and automobile are differentiated.
Controller adopts 8 PIC type single-chip microcomputers (as: PIC10 of MICROCHIP company, PIC12, PIC16, PIC18), connects respectively at the signal processor in the signal amplification in the double base rpyroelectric infrared detecting device and treatment circuit, the microwave detector.
The pick-up unit that above-mentioned each parts constitute is installed in one 20X30 centimetre the control box
Control box is installed on the wall in the passage of parking lot, device setting height(from bottom) 2.2-3.5.The detection direction of pick-up unit becomes 60 degree angles with passage ground.
This pick-up unit is for the recognition principle of automobile and human body etc.: as shown in Figure 2; When interference such as human body or bicycle (6) during at the regional a (4) that double base rpyroelectric infrared detecting device can detect; Because finite volume can not also be in the regional b (5) that double base rpyroelectric infrared detecting device can detect; But automobile (2) vehicle body is long, volume is big, can be in regional a (4) and regional b (5) that the rpyroelectric infrared detecting device can detect; As shown in Figure 3; When interference such as human body (4) and automobile (3) are in the zone (2) that double base rpyroelectric infrared detecting device can detect; Also will be in microwave detector institute ability detected zone (1); When automobile (3) or human body etc. disturbed (4) to move, the diffracted intensity of the detected waveform of microwave detector was different, identified interference (4) such as human body.
Recognition principle for vehicle traveling direction: as shown in Figure 2; Automobile (2) is when the zone (5) that the zone (4) that successively can detect through double base rpyroelectric infrared detecting device and double base rpyroelectric infrared detecting device can detect; This device is judged the travel direction of car automobile (2) through judging the sequencing in the zone (5) that zone (4) that automobile (2) can detect through double base rpyroelectric infrared detecting device and double base rpyroelectric infrared detecting device can detect.Microwave detector is owing to the angle that becomes 60 degree with the installation direction in track;, according to the principle of Doppler effect, when automobile (2) draw near drive towards microwave detector the time; The increase frequency of feedback; When automobile from the close-by examples to those far off sail out of microwave detector the time, then the frequency of feedback reduces, thereby measures the current direction of automobile (2).
Claims (4)
1. the two mirror of a passive infrared microwave vehicle Flow Detection device is characterized in that this device comprises controller, the double base rpyroelectric infrared detecting device and the microwave detector that link to each other with controller respectively; Adopt between double base rpyroelectric infrared detecting device and the microwave detector with door and be connected.
2. pick-up unit according to claim 1 is characterized in that, said double base rpyroelectric infrared detecting device is mainly amplified by one group of Fresnel Lenses assembly, two thermoelectric type infrared sensors, signal and treatment circuit is formed; Wherein two thermoelectric type infrared sensors are connected with signal amplification and treatment circuit respectively; Signal amplification and treatment circuit are connected with controller.
3. pick-up unit according to claim 1 is characterized in that said microwave detector mainly is made up of antenna, transmitting-receiving subassembly, linear modulation unit, intermediate frequency amplifier, signal processor; Wherein antenna is connected with transmitting-receiving subassembly is two-way, and transmitting-receiving subassembly is connected with linear modulation unit, intermediate frequency amplifier respectively, and intermediate frequency amplifier is connected with signal processor; Signal processor is connected with controller.
4. pick-up unit according to claim 1 is characterized in that, said controller adopts 8 PIC type single-chip microcomputer single-chip microcomputers, connects respectively at the signal processor in the signal amplification in the double base rpyroelectric infrared detecting device and treatment circuit, the microwave detector.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200251148U CN202422424U (en) | 2012-01-18 | 2012-01-18 | Passive infrared microwave double-technology vehicle flow detecting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2012200251148U CN202422424U (en) | 2012-01-18 | 2012-01-18 | Passive infrared microwave double-technology vehicle flow detecting device |
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| Publication Number | Publication Date |
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| CN202422424U true CN202422424U (en) | 2012-09-05 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN2012200251148U Expired - Fee Related CN202422424U (en) | 2012-01-18 | 2012-01-18 | Passive infrared microwave double-technology vehicle flow detecting device |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680799A (en) * | 2013-11-29 | 2015-06-03 | 青岛永通电梯工程有限公司 | Vehicle flow detection method |
| CN106056918A (en) * | 2016-07-19 | 2016-10-26 | 黄忠虎 | Vehicle converse running and illegal lane change detection system and detection method based on laser ranging |
-
2012
- 2012-01-18 CN CN2012200251148U patent/CN202422424U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN104680799A (en) * | 2013-11-29 | 2015-06-03 | 青岛永通电梯工程有限公司 | Vehicle flow detection method |
| CN106056918A (en) * | 2016-07-19 | 2016-10-26 | 黄忠虎 | Vehicle converse running and illegal lane change detection system and detection method based on laser ranging |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20120905 Termination date: 20190118 |