CN203053860U - Scattering type low visibility early warning detector - Google Patents
Scattering type low visibility early warning detector Download PDFInfo
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- CN203053860U CN203053860U CN 201320055061 CN201320055061U CN203053860U CN 203053860 U CN203053860 U CN 203053860U CN 201320055061 CN201320055061 CN 201320055061 CN 201320055061 U CN201320055061 U CN 201320055061U CN 203053860 U CN203053860 U CN 203053860U
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- early warning
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Abstract
The utility model discloses a scattering type low visibility early warning detector. The detector is mainly composed of an infrared light emitting device, an infrared light receiving device, a receiving end sensor signal conditioning module, a control module, an early warning data output module and a power supply module. A light source modulator of the infrared light emitting device realizes the conversion between an electric signal and an optical signal; a filter amplifier of the receiving end sensor signal conditioning module extracts useful signals; the control module adopts an LPC17xx series microprocessor; the early warning data output module comprises wired transmission and wireless transmission. The scattering type low visibility early warning detector is a low visibility early warning system front-end intelligent facility, can simultaneously provide various wired and wireless data transmission modes, and improves the early warning detection coverage area, density and observation and predicting precision; and the scattering type low visibility early warning detector is beneficial to improving the operating efficiency and the system performance, is convenient to upgrade, maintain and expand, and has good social benefits and wide industrialization foreground.
Description
Technical field
The utility model relates to ray machine electricity one accurate detector device, specifically a kind of diffuse transmission type low visibility pre-warning detector.
Background technology
" visibility " namely is the visibility distance of people's normal vision observed object thing; " low visibility " namely is to be difficult to tell object body profile clearly from limit background far away.The important parameter that meteorological department is applied to synoptic analysis is not only in observing and predicting of " visibility ", also can play a significant role for fields such as communications and transportation such as highway, navigation, aviation and military affairs, environmental monitorings simultaneously.Early stage " visibility " observes and predicts, mainly be to rely on to set up the visibility detecting instrument of wire transmission, weather conditions are monitored in real time, when meeting low visibility weather, then in time release news to the related personnel by early warning modes such as changeable message signs, traffic information broadcasting, in order in time take correct counter-measure, effectively reduce the various losses that low visibility weather brings.In the last few years, the visibility detecting instrument that use in places such as highway in China traffic, harbour, airport, be mainly imported product, expensive price has been limited to it and only can have been made visibility to the weather of some key areas and observe and predict, be difficult to cover zone among a small circle, other " group's mist " multiple part, therefore exist the visibility early warning to detect the blind area.On the other hand, poor based on the visibility detecting instrument expanded compatibility of wire transmission, the necessary input that relies on the capital construction aspect can only just can be set up use in the place of wire communication networking, therefore equally also has visibility early warning blind area.At present, the homemade atmospheric visibility detector that has appeared on the market, mainly tipping is put by sending out, receiving end sensor assembly, control module, early warning data outputting module and power module etc. are formed, and system module is core with the AVR single-chip microcomputer mostly, and adopts split-type structural.It is big that this atmospheric visibility detector exists volume again, and functional module is disperseed, power consumption height, the weak point that expanded compatibility is relatively poor, early warning output is single and cost is higher.
Summary of the invention
The utility model is at above-mentioned existing problems and weak point, a kind of diffuse transmission type low visibility pre-warning detector has been proposed, purpose is by the structure of existing visibility pre-warning detector is improved, with realize these facility have low cost, low-power consumption, expanded compatibility good, can insert the functional characteristic that existing intelligent traffic monitoring network low visibility early warning detects front end flexibly.
Technical solution of the present utility model
The utility model mainly is made up of infrared light emitter and infrared light receiving trap, receiving end sensor signal conditioning module, control module, early warning data outputting module and power module.
Described infrared light emitter mainly is made up of optical transmitting system, infrared light-emitting device, stabilized intensity device, light modulator.Light modulator connects infrared light-emitting device, and infrared light-emitting device is double light path, connects optical transmitting system and stabilized intensity device respectively.
Described infrared light receiving trap mainly is made up of receiving optics, photoelectricity receiving transducer.The receiving optics receiving scattered light exports the photoelectricity receiving transducer to.
Described receiving end sensor signal conditioning module mainly is made up of trsanscondutance amplifier, bandpass filtering network, lock-in amplifier, low-pass amplifier.The mutual conductance prime amplifier is connected with bandpass filtering network, lock-in amplifier, low-pass amplifier successively.
Described control module mainly is made up of analog to digital converter, microprocessor, modulation generator, digital phase shifter, SD card data-carrier store.The output of analog to digital converter is connected with the microprocessor input, and microprocessor is two-way input and output and is connected with modulation generator, digital phase shifter, SD card data-carrier store.
Described early warning data outputting module comprises 232 bus transfer, 485 bus transfer, the transmission of RF wireless data, GPRS public network data transmission, and adopts parallel output mode.
Described power module comprises+the 12VDC out-put supply ,+the SVDC out-put supply, ± the SVDC out-put supply.
Further technical solution of the present utility model
The microprocessor of described control module is the LPC17xx series microprocessor of ARM Cotex-M3 kernel framework.
The transmitting illuminant of described infrared light emitter adopts the infrared LED combination of 940nm wavelength.
The infrared transmitter spare of described infrared light emitter all adopts the Si4432 chip with the photoelectricity receiving transducer of infrared light receiving trap.
In addition, above-mentioned infrared light emitter is two-way input and output with control module and is connected; The infrared light receiving trap is two-way input and output with receiving end sensor signal conditioning module and is connected; Control module is two-way input and output with the early warning data outputting module and is connected; Power module all is two-way input and output with infrared light emitter, infrared light receiving trap and other module and is connected.
The beneficial effects of the utility model
(1) the utility model belongs to the intelligent facility of low visibility early warning system front end, and the forward scattering mode that it adopts is used photoelectric technology infrared light is launched modulation, and the scattered light that receives is converted to electric signal; Use the Detection of Weak Signals technology again and carry out signal condition, change laggard line data collection and storage through A/D, can issue real-time information, be convenient to the inquiry of historical data again.
(2) the utility model provides the several data transmission mode simultaneously, to tackle on-the-spot complex installation condition and diversified application demand; Except 232 or 485 traditional universal serial bus data transmission, also can carry out wireless connections with on-the-spot early warning actuating equipments such as changeable message signs, road signs easily by the RF wireless data transmission of ISM band, carry out Data Update in real time; By GPRS or CDMA public network data transmission, can set up long distance wireless with the commander Surveillance center in no wire communication networking zone and be connected, improve early warning and detected coverage and density.
(3) the utility model is compared the obvious precision of observing and predicting that has promoted instrument with existing visibility detector, is conducive to improve operational efficiency and system performance, is convenient to upgrading, maintenance and expansion, has good social benefit and wide industrialization prospect.
Description of drawings
Accompanying drawing 1 is formed the structural representation of member for the utility model.
Embodiment
As shown in Figure 1,
The utility model mainly is made up of infrared light emitter 1 and infrared light receiving trap 2, receiving end sensor signal conditioning module 3, control module 4, early warning data outputting module 4 and power module 6.
The optical transmitting system of infrared light emitter 1 of the present utility model is configured to double light path, be used for forward scattering and stabilized intensity reference, transmitting illuminant adopts the infrared LED group of 940nm wavelength, carry out modulate emission with fixing low frequency square wave, the receiving end that enters infrared light receiving trap 2 through the scattering of certain volume air column wherein, the stabilized intensity device adopts the negative feedback comparative measurement method, light intensity by monitoring emitter reference path, the light intensity wild effect that temperature variation and device aging effect are caused compensates and calibrates, and reduces systematic measurement error.Infrared light is converted to stable electric signal,
Infrared light receiving trap 2 is converted to stable electric signal with infrared light, guarantees the accuracy of measuring.
The electric signal that receiving end sensor signal conditioning module 3 receives, be actually buried ac current signal that receiving the peace level at noise and in disturbing, need to use the Detection of Weak Signals technology and nurse one's health the suitable d. c. voltage signal that is converted to amplitude range and give that AD samples and numerical value reads.In this, the mutual conductance prime amplifier is voltage with current conversion and carries out prime and amplify, disturb and high-frequency interferencing signal by bandpass filter filtering 50Hz power frequency, send into lock-in amplifier after exchanging amplification, adopt the mode of phase sensitive detection from ground unrest, to extract useful modulation signal, and nurse one's health into the DC level with suitable amplitude.
The analog to digital converter of control module 4 provides digital signal for microprocessor, SD card data-carrier store is finished and microprocessor data storage and exchange, microprocessor is programmed and is connected modulation generator and digital phase shifter respectively, the phase shift error of having avoided components and parts temperature drift to cause fully.Then, the theoretical formula according to the forward scattering mensuration calculates the atmospheric visibility value by microprocessor.Owing to be furnished with photoelectric receiving device in the reference path of transmitter, light intensity by monitoring emitter reference path, adopt the negative feedback comparative measurement method to stablize calibration, compensation reduces systematic measurement error because of the emission light intensity problem of unstable that reasons such as temperature variation and device aging effect cause.Adopting the LPC17xx series microprocessor of the ARM Cotex-M3 kernel framework of the Peripheral Interface that has higher travelling speed and enrich based on control module again is the hardware platform of core, the designing requirement of aspects such as system's low cost, low-power consumption, high-performance can be satisfied, whole control functions such as modulation of source, numeral are shifted to, numerical evaluation, real-time clock, bus driver, data storage, temperature monitoring can be realized.Early warning data outputting module 5 has realized the data transmission of multiple mode, to tackle on-the-spot complex installation condition and various application demand, this detector gained low visibility early warning information can be linked into the early warning and monitoring network flexibly and easily.
To sum up, the utility model can reach the goal of the invention of expection.
Claims (7)
1. diffuse transmission type low visibility pre-warning detector, it is characterized in that: it mainly is made up of infrared light emitter and infrared light receiving trap, receiving end sensor signal conditioning module, control module, early warning data outputting module and power module; Described infrared light emitter mainly is made up of optical transmitting system, infrared light-emitting device, stabilized intensity device, light modulator, light modulator connects infrared light-emitting device, infrared light-emitting device is double light path, connects optical transmitting system and stabilized intensity device respectively; Described infrared light receiving trap mainly is made up of receiving optics, photoelectricity receiving transducer, and the receiving optics receiving scattered light exports the photoelectricity receiving transducer to; Described receiving end sensor signal conditioning module mainly is made up of mutual conductance prime amplifier, bandpass filtering network, lock-in amplifier, low-pass amplifier, and the mutual conductance prime amplifier is connected with bandpass filtering network, lock-in amplifier, low-pass amplifier successively; Described control module mainly is made up of analog to digital converter, microprocessor, modulation generator, digital phase shifter, SD card data-carrier store, the output of analog to digital converter is connected with the microprocessor input, and microprocessor is two-way input and output and is connected with modulation generator, digital phase shifter, SD card data-carrier store.
2. diffuse transmission type low visibility pre-warning detector according to claim 1, it is characterized in that: described early warning data outputting module comprises 232 bus transfer, 485 bus transfer, the transmission of RF wireless data, GPRS public network data transmission, and adopts parallel output mode.
3. diffuse transmission type low visibility pre-warning detector according to claim 1 is characterized in that: described power module comprises+the 12VDC out-put supply ,+the SVDC out-put supply, ± the SVDC out-put supply.
4. diffuse transmission type low visibility pre-warning detector according to claim 1, it is characterized in that: the microprocessor of described control module is the LPC17xx series microprocessor of ARM Cotex-M3 kernel framework.
5. diffuse transmission type low visibility pre-warning detector according to claim 1 is characterized in that: the infrared LED combination of the transmitting illuminant employing 940nm wavelength of described infrared light emitter.
6. diffuse transmission type low visibility pre-warning detector according to claim 1 is characterized in that: the infrared transmitter spare of described infrared light emitter all adopts the Si4432 chip with the photoelectricity receiving transducer of infrared light receiving trap.
7. diffuse transmission type low visibility pre-warning detector according to claim 1, it is characterized in that: described infrared light emitter is two-way input and output with control module and is connected; The infrared light receiving trap is two-way input and output with receiving end sensor signal conditioning module and is connected; Control module is two-way input and output with the early warning data outputting module and is connected; Power module all is two-way input and output with infrared light emitter, infrared light receiving trap and other module and is connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320055061 CN203053860U (en) | 2013-01-31 | 2013-01-31 | Scattering type low visibility early warning detector |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201320055061 CN203053860U (en) | 2013-01-31 | 2013-01-31 | Scattering type low visibility early warning detector |
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| Publication Number | Publication Date |
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| CN203053860U true CN203053860U (en) | 2013-07-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 201320055061 Expired - Fee Related CN203053860U (en) | 2013-01-31 | 2013-01-31 | Scattering type low visibility early warning detector |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413442A (en) * | 2013-07-30 | 2013-11-27 | 刘伟 | Highway agglomerate fog early warning system based on intervisibility distance monitoring and early warning method thereof |
-
2013
- 2013-01-31 CN CN 201320055061 patent/CN203053860U/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103413442A (en) * | 2013-07-30 | 2013-11-27 | 刘伟 | Highway agglomerate fog early warning system based on intervisibility distance monitoring and early warning method thereof |
| CN103413442B (en) * | 2013-07-30 | 2015-09-16 | 重庆交通大学 | Based on expressway fog early warning system and the method for early warning of the monitoring of intervisibility distance |
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| Date | Code | Title | Description |
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| 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: 20130710 Termination date: 20140131 |