CN2667505Y

CN2667505Y - Bidirectional laser width measuring and centering instrument

Info

Publication number: CN2667505Y
Application number: CN 200320129659
Authority: CN
Inventors: 李俊春
Original assignee: Individual
Current assignee: Individual
Priority date: 2003-12-26
Filing date: 2003-12-26
Publication date: 2004-12-29
Anticipated expiration: 2013-12-26

Abstract

The utility model relates to a bi-direction direction detecting and centering device, pertaining to the technical field of apparatuses and devices. The utility model comprises a device chassis, a laser emission mechanism, a laser receiving mechanism, a spectroscope which is arranged in the interior, light-to-electricity transfer mechanisms, a laser driver circuit and an electric circuit board. The laser emission mechanism and the laser receiving mechanism are in a bi-direction arrangement with a 180 DEGs angle between. The internal light--to-electricity transfer mechanisms are respectively arranged on the accesses of two paths of laser. The internal electric circuit comprises a sounding impulse receiving circuit, a detecting width signal process circuit, a detecting width signal calculating and display circuit. The utility model is simple and convenient and flexible, as well as easy to be carried and used on sites. The utility model prevents the cockamamie process of benchmark plane in laser width detecting and enhances the accuracy of device measuring.

Description

Two-way laser is surveyed wide and is decided China National Instruments Import ﹠ Export Corporation

Technical field

The utility model belongs to the instrument and equipment field, and wide the reaching of two-way laser survey that specially refers in the laser distance measuring system decided China National Instruments Import ﹠ Export Corporation.

Background technology

Laser ranging, be to utilize laser technology to come a kind of means of measurement target distance, it is to utilize laser instrument to do radiation source, to target emission laser, then from the signal that target reflection is returned, extract the range information of target, before laser ranging occurs, usually employing optical distance measurement apparatus or microwave radar come the distance between measurement target, optical distance measurement apparatus is adjusted the distance resolution can not be satisfactory, and the microwave radar range finding, its angular resolution is relatively poor, when using near the ground, sea, multipath and clutter problem make radar range finding be difficult to solve.Yet, laser distance measuring system is a radiation source with the laser light wave, the high several magnitude of its frequency ratio microwave, quantitative change on the frequency, make this technology produce the variation of matter, make in measuring accuracy, resolution, aspects such as anti-interference have the incomparable superiority of other range measurement systems, in addition, it is little that it also has a volume, range finding speed is fast, measurement data is easy to characteristics such as digitized processing, laser ranging technique is once the very big attention that people occur being subjected to, and obtained to develop rapidly, now become a kind of ranging technology of comparative maturity, test at guided missile range, satellite orbit is measured, fire control, geodetic surveying, mapping, many military affairs such as traffic control, civil area all is used widely, laser distance measuring system is pressed transmitter radiation pattern difference, can be divided into pulse type laser range finding and continuous wave laser two classes of finding range, press receiver detection mode difference, can be divided into direct receiving system and heterodyne reception system, more type appears in using at present, majority belongs to the pulsed emission, the distance-measuring equipment of direct receiving system, laser instrument is launched extremely narrow laser pulse to measured target, this pulse is got back to the laser range finder receiving unit by target reflection, by the Laser Measurement pulse time Δ t required from stadimeter to the target round trip, just can obtain the distance R between target and the laser range finder, R=1/2C Δ t (wherein C is the light velocity in the air), by formula as can be known, the position of stadimeter, it must should be reference point with accurate coordinates, otherwise will inaccurate defective appear to fixing or revocable measured target, when concrete operations, laser range finder need be placed a wherein end of tested width, as shown in Figure 1, measure width from the A face to the B face, laser range finder LM is placed tested surface A (or B), thereby measure distance L from the A face to the B face.During with the width between 2 faces of laser range finder measurement, just need a reference point, laser range finder is placed this reference point, measure distance, thereby calculate 2 width between the face from this reference point to another tested surface.In order to get rid of the harsh requirement to the reference point coordinate accuracy, we have researched and developed the two-way laser width gage according to the experience of being engaged in laser ranging of being accumulated, and provide a kind of convenient and measure the laser measuring device for measuring of 2 width between the face efficiently.As shown in Figure 2, the maximum characteristics of the wide device of this Laser Measuring are to adopt the two-way laser measuring technique, from two-way laser width gage DBLM, launch the laser beam to 2 tested surface A and the B that are mutually 180 degree respectively, two-way laser width gage DBLM measures the distance L 1 of A face respectively and arrives the distance L 2 of B face, and, promptly obtain width L from the A face to the B face with the distance L 1 and the L2 addition that record respectively.

Summary of the invention

The utility model technical issues that need to address are, at in the prior art of laser ranging only being unidirectional single beam laser range finding, the each measurement needs to determine reference field, comparatively loaded down with trivial details, and influence the weak points such as accuracy of measured data, just need to redesign a kind of device that reference field carries out laser ranging that do not need to set in order to overcome these deficiencies, in order to realize the purpose of this utility model, be to adopt following technical scheme to finish, a kind of two-way laser is surveyed wide and is decided China National Instruments Import ﹠ Export Corporation, comprise the instrument cabinet, Laser emission and laser receiver, place inner spectroscope, photoelectric conversion device, laser drive circuit and electronic circuit board, it is characterized in that Laser emission and laser receiver are two-way setting, close its position is 180 degree angles; Inner photoelectric conversion device also is to be separately positioned on the path of two-way laser; The internal electron circuit comprises direct impulse receiving circuit, detection range signal processing circuit, detection width signal operation and display circuit; Owing to adopted the double light beam laser distance-finding method, this Laser Measuring is wide and decide China National Instruments Import ﹠ Export Corporation and do not need reference point can measure width between 2 face A and the B, this instrument can be placed on tested A face and B face position intermediate, and the minimum interval of a tested surface of its distance is the minimum interval of single beam laser range finding.Thereby greatly facilitate and the width measure process of having simplified in the various engineerings application.During measurement, two bundle laser B1, B2 sends in the opposite direction from laser instrument LD1 and LD2 respectively, B1 and B2 are mutually 180 degree, laser instrument LD1 and LD2 are driven by the LD driving circuit, the pulse that LD1 and LD2 are sent has the different recurrent intervals, be convenient to follow-up signal processing circuit and distinguish the distance signal of 2 bundle laser, as laser B1, B2 projects tested surface A respectively and the B back reflection is returned, through spectroscope M1 and M2 the laser that reflects is delivered to photodetector D1 and D2, photodetector converts the pulsed laser signal that detects to electric signal, and electric signal is delivered to DP direct impulse signal receiving circuit handle, this direct impulse signal receiving circuit comprises preposition amplification again, signal shaping, pulsewidth identification, counter and phase measurement.DD distance signal treatment circuit converts the signal of DP signal receiving circuit to distance signal, and carry out error correction, thereby obtain to restraint the distance signal that laser record respectively by 2, this distance signal is delivered to the computing of DS width signal and display circuit carries out calculation process, obtain the width signal between A and the B, and demonstrate width by display circuit and display device.

When needs are determined central point between A face and the B face, only need distance D 1 and the D2 that records carried out subtraction, when the result was 0, this installs residing position was central point.Adopt advanced electronic technology and semiconductor laser and photodetector, in 400 meters left and right sides measurement ranges, this instrument can be made into a light small and exquisite hand-held surveying instrument.

The beneficial effects of the utility model are that this instrument is easy, flexible, is easy to carry and on-the-spot the use, has avoided the process of the loaded down with trivial details setting reference field in the laser ranging, the accuracy that has improved apparatus measures.

Description of drawings

Fig. 1 is traditional unidirectional laser range finder light path synoptic diagram

Fig. 2 is this two-way laser width gage light path synoptic diagram

Fig. 3 is this two-way laser width gage appearance synoptic diagram

Fig. 4 is an internals annexation block scheme in this instrument

Embodiment

With reference to Fig. 1, Fig. 2, unidirectional laser range finder and two-way laser of the present invention are surveyed the wide difference of deciding China National Instruments Import ﹠ Export Corporation light path synoptic diagram that reaches in the expression prior art, and two-way laser is surveyed wide and decided China National Instruments Import ﹠ Export Corporation and send laser beam L1, the L2 directive measured target that two bundles are 180 degree angles as can be seen.With reference to Fig. 3, represent the appearance synoptic diagram of this two-way laser width gage, include cabinet 1, by 180 degree symmetrically arranged laser beam emitting device LD1, LD2, laser receiver LD1 ', LD2 ', interior lights electric transducer 2 and 2 ' electronic circuit plate portion 3.With reference to Fig. 4, this instrument internal is provided with two photoelectric commutators 2 and 2 ', and electronic circuit board 3 includes DP direct impulse signal receiving circuit, DD detection range signal processing circuit, and DS measures width signal computing and display circuit.

Claims

1, a kind of two-way laser is surveyed wide and is decided China National Instruments Import ﹠ Export Corporation, comprise instrument cabinet, Laser emission and laser receiver, place inner spectroscope, photoelectric conversion device, laser drive circuit and electronic circuit board, it is characterized in that, Laser emission and laser receiver are two-way setting, and close its position is 180 degree angles; Inner photoelectric conversion device also is to be separately positioned on the path of two-way laser; The internal electron circuit comprises direct impulse receiving circuit, detection range signal processing circuit, detection width signal operation and display circuit.

2, two-way laser according to claim 1 is surveyed wide and is decided China National Instruments Import ﹠ Export Corporation, it is characterized in that this instrument can be placed on tested A face and B face position intermediate, and the minimum interval of a tested surface of its distance is the minimum interval of single beam laser range finding.

3, two-way laser according to claim 1 is surveyed wide and is decided China National Instruments Import ﹠ Export Corporation, it is characterized in that this direct impulse signal receiving circuit comprises preposition amplification, signal shaping, pulsewidth identification, counter and phase measurement again.