CN102200579A - Handheld pulse laser range finder - Google Patents
Handheld pulse laser range finder Download PDFInfo
- Publication number
- CN102200579A CN102200579A CN2010101359865A CN201010135986A CN102200579A CN 102200579 A CN102200579 A CN 102200579A CN 2010101359865 A CN2010101359865 A CN 2010101359865A CN 201010135986 A CN201010135986 A CN 201010135986A CN 102200579 A CN102200579 A CN 102200579A
- Authority
- CN
- China
- Prior art keywords
- range finder
- pulse laser
- speed
- signal
- amplifier
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Images
Landscapes
- Optical Radar Systems And Details Thereof (AREA)
Abstract
The invention discloses a handheld pulse laser range finder capable of detecting a return signal which is lower than a noise signal. The handheld pulse laser range finder comprises a photoelectric receiving tube and an amplifier, wherein the amplifier is connected to a high-speed analogue digital converter (ADC), a high-speed field programmable gate array (FPGA) and a micro control unit (MCU), which are sequentially connected; and the FPGA comprises a high-speed random access memory (RAM) which is connected with an ADC interface and an MCU interface. By the scheme, a high-speed analogue digital (AD) device converts a plurality of return signals into digital signals and analyzes the plurality of return signals to realize weak signal detection, so that the return signal which is lower than the noise signal can be detected, and a ranging distance of the range finder can be effectively increased.
Description
Technical field
The present invention relates to the instrument of measuring distance, specifically is a kind of hand-held pulse laser laser welder.
Background technology
Tradition hand-held pulse laser range finder echo signal processing flow as shown in Figure 1, photoelectric receiving tube receives the laser that measured target reflects, compare through amplifier amplification back and a threshold voltage, when echoed signal intensity is higher than threshold voltage, comparer output high level, the formation echo-pulse is delivered to follow-up circuit and is handled.Select suitable threshold voltage, thereby make noise signal be lower than threshold voltage compacting noise, therefrom as can be seen when the intensity of echoed signal is lower than noise signal stadimeter can't find range.Under the same conditions, comprise environment, optical system, reception amplification system etc., the signal that receives along with the increase receiving system of distance also can decrease, arrive after the certain distance, echoed signal is lower than noise signal, stadimeter just can't have been found range, and this has just determined the ranging of stadimeter.
Summary of the invention
At the problems referred to above, the present invention aims to provide a kind of hand-held pulse laser laser welder that can detect the echoed signal that is lower than noise signal.
For realizing this technical purpose, the present invention adopts following scheme: a kind of hand-held pulse laser laser welder, comprise photoelectric receiving tube, amplifier, described amplifier is connected to high-speed digital-analog transducer ADC, high speed field programmable gate array unit F PGA and MCU who is linked in sequence successively, and described FPGA comprises the high-speed RAM that is connected with ADC interface and MCU interface.
This programme becomes digital signal to the multiecho conversion of signals by the high-speed AD device, again a plurality of echoed signals are carried out analyzing and processing to realize Detection of weak, can detect the echoed signal that is lower than noise signal, realize effective increase of stadimeter ranging.
Description of drawings
Fig. 1 is the structured flowchart of the stadimeter of this prior art.
Fig. 2 is the structured flowchart of stadimeter of the present invention.
Embodiment
As shown in Figure 1, a kind of hand-held pulse laser laser welder, comprise photoelectric receiving tube, amplifier, described amplifier is connected to high-speed digital-analog transducer ADC, high speed field programmable gate array unit F PGA and MCU who is linked in sequence successively, and described FPGA comprises the high-speed RAM that is connected with ADC interface and MCU interface.
In operational process, echoed signal converts digital signal to through high-speed ADC after amplifying through amplifier, under FPGA control, digital signal after the ADC conversion is temporarily stored in the built-in high-speed RAM the inside of FPGA, after the total data sampling finished, MCU carried out subsequent treatment from the RAM sense data of FPGA inside.Like this, can carry out analyzing and processing to realize Detection of weak, can detect the echoed signal that is lower than noise signal, realize effective increase of stadimeter ranging a plurality of echoed signals.
Claims (1)
1. hand-held pulse laser laser welder, comprise photoelectric receiving tube, amplifier, it is characterized in that: described amplifier is connected to high-speed digital-analog transducer ADC, high speed field programmable gate array unit F PGA and MCU who is linked in sequence successively, and described FPGA comprises the high-speed RAM that is connected with ADC interface and MCU interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101359865A CN102200579A (en) | 2010-03-25 | 2010-03-25 | Handheld pulse laser range finder |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN2010101359865A CN102200579A (en) | 2010-03-25 | 2010-03-25 | Handheld pulse laser range finder |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102200579A true CN102200579A (en) | 2011-09-28 |
Family
ID=44661412
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN2010101359865A Pending CN102200579A (en) | 2010-03-25 | 2010-03-25 | Handheld pulse laser range finder |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN102200579A (en) |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN1851499A (en) * | 2006-05-19 | 2006-10-25 | 武汉大学 | Data acquisition device for laser distance measurement, and its collecting flowchart |
| US20070206174A1 (en) * | 2004-02-19 | 2007-09-06 | Leica Geosystems Ag | Hand-Held Device For Measuring Distances |
| CN101320086A (en) * | 2008-06-27 | 2008-12-10 | 北京航空航天大学 | Echo signal processing equipment and method of Doppler speed measuring laser radar |
| CN201255636Y (en) * | 2008-08-07 | 2009-06-10 | 金华市蓝海光电技术有限公司 | Photoelectric conversion and amplification device for laser distance measuring instrument |
| CN101655563A (en) * | 2008-08-21 | 2010-02-24 | 金华市蓝海光电技术有限公司 | Laser ranging method with high accuracy and low power consumption and device thereof |
-
2010
- 2010-03-25 CN CN2010101359865A patent/CN102200579A/en active Pending
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US20070206174A1 (en) * | 2004-02-19 | 2007-09-06 | Leica Geosystems Ag | Hand-Held Device For Measuring Distances |
| CN1851499A (en) * | 2006-05-19 | 2006-10-25 | 武汉大学 | Data acquisition device for laser distance measurement, and its collecting flowchart |
| CN101320086A (en) * | 2008-06-27 | 2008-12-10 | 北京航空航天大学 | Echo signal processing equipment and method of Doppler speed measuring laser radar |
| CN201255636Y (en) * | 2008-08-07 | 2009-06-10 | 金华市蓝海光电技术有限公司 | Photoelectric conversion and amplification device for laser distance measuring instrument |
| CN101655563A (en) * | 2008-08-21 | 2010-02-24 | 金华市蓝海光电技术有限公司 | Laser ranging method with high accuracy and low power consumption and device thereof |
Non-Patent Citations (1)
| Title |
|---|
| 刘文: "基于FPGA技术的激光测距***研究", 《中国优秀硕士学位论文全文数据库工程科技II辑》 * |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN203688801U (en) | Laser distance measuring device having gain control circuit | |
| CN1997911B (en) | Distance measurement method and device using ultrasonic waves | |
| CN106772404B (en) | Laser radar ranging device and method | |
| CN109375194A (en) | AFE(analog front end) reading circuit for laser radar | |
| CN103995263B (en) | A kind of ultrasonic ranging method based on sequential | |
| CN107632298B (en) | High-sensitivity receiving circuit applied to pulse type laser radar system | |
| EP2085789A3 (en) | Physical quantity sensor and physical quantity measuring method | |
| CN107544072B (en) | High-precision distance measurement system and method with preset waveform matching | |
| CN102498412A (en) | Ultrasonic detector | |
| CN105319556A (en) | Pulse laser rangefinder and implementation method thereof | |
| CN104236505A (en) | Pipeline corrosion monitoring device based on array type piezoelectric film sensor | |
| CN103822697A (en) | Intelligent hydrophone with self-calibration function | |
| CN202815212U (en) | Magnetron radar frequency tracking device | |
| CN101915719A (en) | Dual-channel high-low-frequency ultrasonic attenuation signal detection device | |
| CN106510755A (en) | Method of ultrasonic medical apparatus to detect received signals | |
| CN103018749B (en) | Device and method for pulse laser ranging | |
| CN112564705B (en) | Multi-channel data acquisition method for radon measuring instrument | |
| CN202119903U (en) | Weather radar transmitted pulse envelope detection device | |
| CN102200579A (en) | Handheld pulse laser range finder | |
| CN104792284B (en) | A kind of method of ultrasonic thickness measurement | |
| CN201724882U (en) | Double-channel high-low frequency ultrasonic decay signals detection device | |
| CN104931588A (en) | kilomega network communication-based multichannel ultrasonic parallel high-speed acquisition hardware system | |
| JP6571502B2 (en) | UWB measurement system | |
| JP2017044518A (en) | Signal processing device and radiation measurement device | |
| CN104777473A (en) | Detection method for ultrasonic sensor |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| C12 | Rejection of a patent application after its publication | ||
| RJ01 | Rejection of invention patent application after publication |
Application publication date: 20110928 |