CN2929860Y - Radio sensor network node device for detection vehicle position - Google Patents
Radio sensor network node device for detection vehicle position Download PDFInfo
- Publication number
- CN2929860Y CN2929860Y CNU2006200230606U CN200620023060U CN2929860Y CN 2929860 Y CN2929860 Y CN 2929860Y CN U2006200230606 U CNU2006200230606 U CN U2006200230606U CN 200620023060 U CN200620023060 U CN 200620023060U CN 2929860 Y CN2929860 Y CN 2929860Y
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- parking stall
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- ultrasonic
- network node
- chip microcomputer
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Abstract
The utility model provides a wireless sensor network node equipment for checking parking stall, comprising an ultrasonic receiving transducer 1, an ultrasonic transmitting transducer 2, a receiving and magnifying circuit 3, a single chip microcomputer 4, a transmitting and increasing circuit 5 and a wireless communication circuit 6. The equipment checks parking stall status via ultrasonic ranging technique. In the checking process, the utility model samples ultrasonic echo-signal and analysis sampled values via the single chip microcomputer to judge usage status of the parking stall, which is capable of increasing checking accuracy rate effectively. The equipment utilizing a wireless sensor network transmits information of the parking stall status to a packing stall management center by wireless communication mode. Compare with the prior ultrasonic parking stall checking equipment, the utility model not only is high in checking accuracy rate, but also does not wire in the operation.
Description
Technical field
The utility model relates to a kind of wireless senser network node equipment that is used to detect the parking stall, especially a kind of wireless senser network node equipment based on the ultrasound examination parking stall, fundamental purpose is for detecting the parking stall operating position in parking lot by this apparatus for network node.
Background technology
In the parking lot, need to use parking stall measure equipment that the situation that takies of parking stall is detected, the supvr stops car into suitable parking stall by testing result guiding parking person.In known systems, general use ultrasonic sensor detects the situation that takies of parking stall, and the result of detection is transferred to administrative center with certain aspect, so that administrative center carries out uniform dispatching and management.
Existing ultrasound wave parking stall measure equipment is when detecting the vehicle parking stall, at first receive reflection wave signal to ultrasonic pulse of parking stall emission and wait, when reflected signal is handled, checkout equipment amplifies fixing multiple with reflected signal, carry out envelope detection then, and this envelope signal and a fixing level compared judge the time that receives reflected impulse, and judge the situation that takies of parking stall on this basis.In such scheme, the general logical circuit that adopts is finished the parking stall status detection, but the moving object in the surrounding environment also can produce ultrasound wave, will cause interference to parking stall measure equipment, cause parking stall measure equipment to be easy to generate erroneous judgement, the accuracy rate that the parking stall state is judged is not high.Secondly, the amplitude of reflected impulse is subjected to the influence of factors such as environment, propagation distance, its range signal and fixed level is compared the reference position of judging reflected impulse be easy to generate error.Simultaneously,, in implementation process, need connect up, increase quantities and cost at each parking stall and sensor owing to use the wire communication mode to transmit the parking stall status information.
Summary of the invention
At above problem, the utility model provides a kind of wireless senser network node equipment that is used to detect the parking stall, and this equipment is by sampling to the ultrasonic echo signal, and the analytical sampling value is judged the seizure condition of parking stall.Owing to the method for the ultrasonic echo signal having been used sampling analysis, can effectively get rid of the influence of ultrasonic hash, thereby improve the accuracy rate that detects the parking stall.In addition, in order to simplify the installation and maintenance of checkout equipment, the utility model uses wireless sensor network to announcement parking stall, parking lot management center seizure condition, thereby has exempted the wiring problem in the enforcement by radio communication.
For achieving the above object, the logical organization that is used to detect the wireless senser network node equipment of parking stall comprises: successively the ultrasound wave receiving transducer of Lian Jieing, receive amplifying circuit, single-chip microcomputer, emission increasing degree circuit and ultrasound transmitting transducer.This equipment also comprises a radio communication circuit, and single-chip microcomputer is transferred to parking stall administrative center by radio communication circuit with signal.
When carrying out parking stall measure, ultrasound transmitting transducer at first to parking stall emission ultrasonic pulse, starts the ultrasound wave receiving transducer then and receives reflection wave.Single-chip microcomputer utilizes mould/number conversion function or independent mould/number conversion circuit that the waveform of reflected signal is sampled, and sampled value is carried out signal identification, draws the parking stall and takies situation.At last, single-chip microcomputer is transferred to parking stall administrative center with the situation that takies of parking stall with communication by radio communication circuit.
As shown in Figure 2, the physical arrangement of above-mentioned wireless senser network node equipment comprises: be installed in ultrasonic circuit plate 7, control circuit board 8 and power supply 9 in the device housings 10, and the ultrasound wave receiving transducer 1 that links to each other with ultrasonic circuit plate 7, ultrasound transmitting transducer 2, and the probe of ultrasound wave receiving transducer 1 and ultrasound transmitting transducer 2 reaches outside the device housings 10.Wherein, ultrasonic circuit plate 7 and control circuit board 8 are connected by connector, provide power supply by power supply 9.
Above-mentioned wireless senser network node equipment is arranged in the top, below of parking stall or all around, periodically to parking stall emission ultrasound wave, the distance between measuring equipment and the parking stall.When the parking stall was occupied, the distance of measurement was the distance of equipment to car; When the parking stall was idle, the distance of measurement will be greater than the distance between equipment and the parking stall.By the variation of measuring distance, can judge the situation that takies of parking stall.
The beneficial effects of the utility model are: this equipment adopts ultrasonic measuring distance technology that the parking stall state is detected, in parking stall measure, by the ultrasonic echo signal is sampled, and use single-chip microcomputer analytical sampling value to judge the user mode of parking stall, can effectively improve the accuracy rate of parking stall measure.This equipment uses wireless sensor network by communication, and the parking stall status information is sent to parking stall administrative center.Compare with existing ultrasound wave parking stall measure equipment, this equipment has parking stall measure accuracy rate height, does not need the advantage that connects up in force.
Description of drawings
Fig. 1 is a schematic diagram of the present utility model;
Fig. 2 is a structural drawing of the present utility model;
Fig. 3 receives the amplifying circuit schematic diagram for ultrasound wave;
Fig. 4 is ultrasonic emitting increasing degree circuit theory diagrams.
Among the figure, identical label is represented identical parts:
1-ultrasound wave receiving transducer 2-ultrasound transmitting transducer 3-receives amplifying circuit 4-single-chip microcomputer 5-emission increasing degree circuit 6-radio communication circuit 7-ultrasonic circuit plate 8-control circuit board 9-power supply 10-device housings
Embodiment
Describe the utility model below in conjunction with accompanying drawing in detail by most preferred embodiment, but do not constitute restriction of the present utility model.As shown in Figure 1, be schematic diagram of the present utility model.Ultrasound transmitting transducer 2 links to each other with emission increasing degree circuit 5, and emission increasing degree circuit 5 links to each other with single-chip microcomputer 4, and single-chip microcomputer 4 produces square-wave signal by after emission increasing degree circuit 5 boosted voltages, drives ultrasound transmitting transducer 2 and sends ultrasonic pulse.Ultrasound wave receiving transducer 1 links to each other with reception amplifying circuit 3, receiving amplifying circuit 3 links to each other with single-chip microcomputer 4, when ultrasound wave receiving transducer 1 receives ultrasonic echo, signal is through after receiving amplifying circuit 3 amplifications, sample by single-chip microcomputer 4, and analytical sampling is worth the parking stall to take the information of situation.Single-chip microcomputer 4 links to each other with radio communication circuit 6 and sends the parking stall occupied information by it to parking lot administrative center.In the present embodiment, single-chip microcomputer has adopted ATmega128L, has mould/number conversion function.The utility model also can adopt other single-chip microcomputer or use independent D/A switch circuit that echoed signal is sampled.
Fig. 2 is a structural drawing of the present utility model, in conjunction with Fig. 1, receives amplifying circuit 3 and is positioned on the ultrasonic circuit plate 7 with emission increasing degree circuit 5; Single-chip microcomputer 4 and radio communication circuit 6 are positioned on the control circuit board 8.Ultrasonic circuit plate 7 and control circuit board 8 are connected by connector.Ultrasound wave receiving transducer 1 links to each other with ultrasonic circuit plate 7 with ultrasound transmitting transducer 2, and the probe of two ultrasonic transducers reaches outside the device housings 10.Power supply 9 provides 3.3 volts direct supply for equipment.
Adopted the ultrasonic transducer of 40KHz in the present embodiment.If to the square-wave signal of this ultrasound transmitting transducer input 40KHz, transducer will be launched the ultrasound wave of 40KHz.The square-wave signal that is input to transducer need could guarantee that ultrasonic waves transmitted can detect 8 meters scopes with interior object more than 10 volts.
Fig. 3 is the schematic diagram of ultrasonic emitting increasing degree circuit, and ATmega128_40KHz is the square wave of the 40KHz that produced by the ATmega128L processor on the control circuit board 8; VCC is the voltage that power supply 9 provides, and the supply voltage scope that ultrasonic circuit plate 7 and control circuit board 8 can operate as normal is between 2.7 volts to 3.3 volts.The ATmega128_40KHz voltage of signals between the VCC, can not be used for directly driving ultrasound transmitting transducer at 0V.In order to produce the high voltage that can drive ultrasound transmitting transducer, in realization, use MAX865 charge pump generations+2VCC and-two voltages of 2VCC, as the positive-negative power of LM8261 operational amplifier.
ATmega128_40KHz is input to the reverse input end of LM8261, simultaneously the fixed level of 1/2VCC is input to the positive input of LM8261, and makes LM8261 be in the open loop magnifying state, just can produce the above square-wave signal of 10V.In this circuit, when ATmega128_40KHz was high level, the voltage of the reverse input end of LM8261 was higher than the voltage of positive input, and LM8261 enters negative state of saturation, and at this moment output voltage is-2VCC; When ATmega128_40KHz was low level, LM8261 entered positive state of saturation output+2VCC, and the amplitude of the square-wave signal of LM8261 output is 4 * VCC like this, and signal intensity can be used for having driven ultrasound transmitting transducer more than 10V.
Fig. 4 is the schematic diagram that ultrasound wave of the present utility model receives amplifying circuit, the ultrasonic signal that transducer receives is very faint, need through processing procedures such as amplification, envelope detection and samplings, by single-chip microcomputer sampled value is carried out echo identification and calculated the parking stall measure result at last.
In the amplifying circuit of ultrasonic ranging, adopted the two-stage amplifying circuit: the enlargement factor of first order amplifying circuit is fixed as 50; And second level amplifying circuit is a digital-control amplifier, and its enlargement factor can dynamic adjustments under the control of ATmega128L.
Through the two-stage amplifying signal,, behind the envelope detection circuit that C49 and R49 constitute, the envelope of ultrasonic reflections signal will be formed by D7.In the realization of present embodiment, used the A/D converter of ATmega128L that the envelope of ultrasonic signal is sampled.At last, ATmega128L carries out the result that analysis meter is calculated parking stall measure to the sampled value of signal envelope.
Claims (4)
1, a kind of wireless senser network node equipment that is used to detect the parking stall, it is characterized in that, comprise the ultrasound wave receiving transducer, reception amplifying circuit, single-chip microcomputer, emission increasing degree circuit and the ultrasound transmitting transducer that connect successively, and the radio communication circuit that links to each other with single-chip microcomputer.
2, wireless senser network node equipment as claimed in claim 1 is characterized in that, described reception amplifying circuit and emission increasing degree circuit are positioned on the ultrasonic circuit plate, and described single-chip microcomputer and radio communication circuit are positioned on the control circuit board.
3, wireless senser network node equipment as claimed in claim 2 is characterized in that, connects by connector between described ultrasonic circuit plate and the control circuit board.
4, wireless senser network node equipment as claimed in claim 1 is characterized in that, described reception amplifying circuit comprises the two-stage amplifying circuit, and the enlargement factor of first order amplifying circuit is fixed, and second level amplifying circuit adopts digital-control amplifier.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200230606U CN2929860Y (en) | 2006-06-09 | 2006-06-09 | Radio sensor network node device for detection vehicle position |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006200230606U CN2929860Y (en) | 2006-06-09 | 2006-06-09 | Radio sensor network node device for detection vehicle position |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2929860Y true CN2929860Y (en) | 2007-08-01 |
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ID=38308236
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006200230606U Expired - Fee Related CN2929860Y (en) | 2006-06-09 | 2006-06-09 | Radio sensor network node device for detection vehicle position |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2929860Y (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102005134A (en) * | 2010-12-24 | 2011-04-06 | 上海中交智能***工程有限公司 | Side-mounted type wireless parking space status detector |
| CN102024342A (en) * | 2010-12-08 | 2011-04-20 | 东莞市华业新科电子科技有限公司 | Intelligent stop sign |
| CN102708702A (en) * | 2012-06-07 | 2012-10-03 | 浙江水利水电专科学校 | Giant magnetoresistance sensing parking space detection device based on wireless sensing network |
| CN107610517A (en) * | 2017-09-30 | 2018-01-19 | 浙江中控研究院有限公司 | A kind of configurable parking space detector and its system based on CMC chips |
| WO2019227662A1 (en) * | 2018-05-28 | 2019-12-05 | 深圳市浩博高科技有限公司 | Self-powered wireless parking space detection device and guidance system |
-
2006
- 2006-06-09 CN CNU2006200230606U patent/CN2929860Y/en not_active Expired - Fee Related
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102024342A (en) * | 2010-12-08 | 2011-04-20 | 东莞市华业新科电子科技有限公司 | Intelligent stop sign |
| CN102005134A (en) * | 2010-12-24 | 2011-04-06 | 上海中交智能***工程有限公司 | Side-mounted type wireless parking space status detector |
| CN102005134B (en) * | 2010-12-24 | 2013-02-27 | 上海中交智能***工程有限公司 | Side-mounted type wireless parking space status detector |
| CN102708702A (en) * | 2012-06-07 | 2012-10-03 | 浙江水利水电专科学校 | Giant magnetoresistance sensing parking space detection device based on wireless sensing network |
| CN102708702B (en) * | 2012-06-07 | 2014-02-19 | 浙江水利水电专科学校 | Giant magnetoresistance sensing parking space detection device based on wireless sensing network |
| CN107610517A (en) * | 2017-09-30 | 2018-01-19 | 浙江中控研究院有限公司 | A kind of configurable parking space detector and its system based on CMC chips |
| WO2019227662A1 (en) * | 2018-05-28 | 2019-12-05 | 深圳市浩博高科技有限公司 | Self-powered wireless parking space detection device and guidance system |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20070801 |