CN1306245C - Laser digital angle measuring method and apparatus thereof - Google Patents
Laser digital angle measuring method and apparatus thereof Download PDFInfo
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- CN1306245C CN1306245C CNB200510011334XA CN200510011334A CN1306245C CN 1306245 C CN1306245 C CN 1306245C CN B200510011334X A CNB200510011334X A CN B200510011334XA CN 200510011334 A CN200510011334 A CN 200510011334A CN 1306245 C CN1306245 C CN 1306245C
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Abstract
The present invention relates to a laser digital angle measurement method and an apparatus. For solving the problem that the existing angle measurement method has low precision, at least one circle of radial angle line uniformly and densely distributed in the circumferential direction are lithographed on an optical disc by laser; two beams of laser which have different frequency and are tandem arranged in the circumferential direction are used for reading the angle lines; the circumferential space between the two beams of laser is less than that of the angle lines; the circumferential width of the two beams of laser is less than that of the angle lines. The angle direction is determined according to the occurrence sequence of feedback signals of the two beams of laser; angles are determined according to the occurrence frequency of the feedback signals. The method of the present invention has the advantages of high measurement precision, convenient implementation, strong reliability, good operability, low running cost and wide popularization and application prospect. The measurement apparatus of the present invention is capable of directly outputting digital signals and has the advantages of quick response time, little temperature influence, little abrasion, little deformation, simple structure, small volume, light weight, low cost, reliable performance, convenient installation and operation and wide application field.
Description
Technical field
The present invention relates to the Technology of Precision Measurement of angle, particularly relate to a kind of laser digital angle measuring method and device thereof.
Background technology
Angle measurement method commonly used has: inductance (electric capacity) detection mode; Slip variable resistor mode; Pulse disc photoelectricity pin sensing or compound pin sensing mode; The two angle lines of CD list are read the line mode, and other modes.
Read the line mode about the two angle lines of CD list in the past: CD list angle line is read the line mode, can not determine the direction of rotation, and two angle lines are read the line mode, can determine the direction of rotating, but need to make two circle angle lines, and about half root angle line segment width that staggers mutually, it is big that it has the disc making difficulty, the defective of being inconvenient to implement.
The principle of work of normal optical disk: it is that naked eyes are invisible that optical disc surface has many data pits.CD-ROM drive utilizes the irradiation of laser beam to obtain the information of plane and pit.CD-ROM drive is to rotate reading of data in the direction of the clock.The laser head irradiation CD that gives off laser beam when laser beam irradiation is to the plane of CD, has 70%～80% light reflected back laser head, is transferred in the optical detection system again, writes down the signal of " 1 ".Otherwise, when laser beam irradiation to pit, can cause laser light scattering, laser can't receive reflected signal, at this moment photodetector just can be write down the signal of " 0 ".Like this, the photodetector of laser constantly is sent to the signal of " 1 " and " 0 " in the decoding circuit of CD-ROM drive, by decoding circuit its translation is become spendable " 1 ", " 0 " signal, and then converts music or other data again to.
Summary of the invention
The object of the present invention is to provide a kind of measuring accuracy height, and make things convenient for the laser digital angle measuring method of implementing, the present invention also aims to be provided for implementing the device of this method.
For achieving the above object, laser digital angle measuring method of the present invention is the radial angle line that circumferentially evenly gathers with at least one circle of laser ablation on CD, laser reading angular line with circumferential tandem two bundle different frequencies, and the circumferential spacing of two bundle laser is less than the circumferential spacing of angle line, the circumferential width of two bundle laser is all less than the circumferential width of angle line, and determine angle direction according to the order that two bundle Laser feedback signals occur, determine angle according to the number of times that feedback signal occurs.The radial angle line is radially and 2 whens circle of column distribution, each encloses the radial angle line and is equipped with independently interpreting system, two circle feedback data cross-references are judged working condition: feedback data is unified, then working properly, feedback signal is inconsistent, then must there be one group of work undesired, in view of the above, can adjusts and keep in repair.Its principle is: the electric signal that sends from the photodiode of laser head becomes laser beam and is mapped on the CD through conversion.Because on behalf of " 0 " and " 1 ", CD come record data with rough pitting, the light that is reflected when therefore they accept laser beam also has the branch of power, at this moment the light that reflects is again through the refraction of plane prism, become electric signal by photodiode, level conversion through control circuit, only become the digital signal that contains " 0 ", " 1 " signal, just can read the information in the CD.
Owing to adopted two laser rays in the design, so through calculating the output that positive pulse and negative pulse have just been arranged, rather than usual 0 and 1.On behalf of CD, direct impulse be rotated in the forward, and reads the amount of the quantity explanation rotation of direct impulse, promptly reads the quantity of the quantity of direct impulse divided by the angle line in one week of CD, multiply by 360 degree again, the angle that is rotated in the forward exactly.Because the disc radial direction angle line can do enough closely, compare with current measuring methods and have advantage of high precision; Because the data of optical disk technology is very ripe, equipment volume is little, in light weight, cost is low, good reliability, therefore, has the convenient advantage of implementing.
As optimization, CD also with many circumferential equally distributed radial portion bit lines of laser ablation, and is determined angular regions according to the feedback signal of position line in the angle line inboard.So design can be learnt angular regions in time, exactly in easy mode.
As optimization, CD is also used radial reference line of laser ablation in the angle line inboard, and determines start angle according to the feedback signal of datum line.Certainly this reference position can be determined that also still, precision can be hanged down relatively by the normal optical electric transducer, compares with above-mentioned CD datum line mode.
As optimization, the parallel laser of the laser beam emitting head emission two bundle different frequencies of two laser generators arranged side by side is housed, through projecting the radial angle line zone of CD after the lens focus, the CD feedback signal is after prismatic refraction; Or received by the laser pick-off head, after two frequency-selecting amplifiers amplifications, two ways of digital signals is sent the combinational logic gate processing of circuit, or be divided into the two-way laser rays by Amici prism, the two-way laser rays converts two ways of digital signals to by the double reception amplifier, and two ways of digital signals is sent the combinational logic gate processing of circuit; Digital signal after the combinational logic gate processing of circuit is sent add subtract counter, the output signal of add subtract counter or after data processor processes the output angle value, or after time base circuit, data processor processes output angle speed.The method can make that this measuring method is more reliable, adaptability is better.
The angle measurement unit that is used to implement the inventive method is by being etched with the circumferentially CD of the even radial angle line that gathers of at least one circle, and parallel double light beam bifrequency laser signal transmitter, CD feedback signal receiver and feedback signal processor and angular display unit are formed; And the circumferential spacing of two bundle laser is less than the circumferential spacing of angle line, the circumferential width of two bundle laser is all less than the circumferential width of angle line, feedback signal processor is determined angle direction according to the order that two bundle Laser feedback signals occur, and determines angle according to the number of times that feedback signal occurs.With a circle angle line, a laser beam emitting head of being made up of two laser generators can obtain rotation direction and amount of spin, designs angle measurement unit with only in the present invention.Laser beam emitting head described here is with reference to common laser pick-up head, different is that common laser pick-up head inside has a transmitter unit i.e. a laser diode or two semiconductor laser generators, and in the laser beam emitting head described herein, there are two transmitter units inside, the emission different wavelength of laser, the distance that allows two laser rays penetrate on CD obviously shortens, and is beneficial to the raising precision.It compares its feature with other measurement of angle devices: directly export digital signal, the response time is fast, temperature effect is little, wearing and tearing are little, distortion is little etc.; Read precision can reach 1 second (1 the degree/360*60*60) below.
As optimization, CD in the angle line inboard also with many circumferential equally distributed radial portion bit lines of laser ablation, this position line separate configurations laser signal transmitter and CD feedback signal receiver, and with shared same feedback signal processor of angle line and angular display unit.The preferred common single beam laser transmitter of this laser signal transmitter.So design can improve measuring accuracy, again can simplified structure.
As optimization, CD is also used radial reference line of laser ablation in the angle line inboard, this datum line separate configurations laser signal transmitter and CD feedback signal receiver, and with angle line and shared same feedback signal processor of position line and angular display unit.The preferred common single beam laser transmitter of this laser signal transmitter.Certainly, this reference position also can be replaced by the normal optical electric transducer, and just precision can reduce.
As optimization, the radial angle line is radially also two of column distribution to enclose, and each encloses the radial angle line and is equipped with independently laser signal transmitter, CD feedback signal receiver, feedback signal processor, but shared same angular display unit.The measurement result cross-reference of two covers and array apparatus can in time be learnt device fault information, in addition, when fault appears in a cover, can also lean on the another set of operate as normal of keeping.
As optimization, parallel double light beam bifrequency laser signal transmitter is made up of the lens that two laser generators arranged side by side and being used to dwindle the laser beam spacing, and CD feedback signal receiver is by the feedback signal of refracting prisms reception from CD.Aspects such as production, precision and adjustment for the ease of measurement mechanism, the laser digital angle measurement unit does not use the laser head of a transmitter unit, because two transmitter units are arranged in the laser beam emitting head, the spacing of its transmitter unit, stability etc. must be better than that a transmitter unit is respectively arranged in two emitting heads; Two or more transmitter units can use same lens in the laser head.Make two of focusing or multi-stripe laser distance between centers of tracks littler.And independent laser head does not possess this ability.Therefore there are two transmitter units or a plurality of transmitter unit to be better than independent laser head in a laser head.
As optimization, CD, laser signal transmitter, CD feedback signal receiver and measured axle are packed in the inert gas filled confined space jointly.So design can make equipment more stable, durable, and antijamming capability is stronger, and data are more accurate.
After adopting technique scheme, laser digital angle measuring method of the present invention has the measuring accuracy height, convenient enforcement, and good reliability, operability is good, and operating cost is low, the advantage that popularizing application prospect is wide.Measurement mechanism of the present invention can directly export digital signal, have the response time fast, temperature effect is little, wearing and tearing are little, distortion is little, simple in structure, volume is little, in light weight, cost is low, dependable performance is easy to install, the advantage that application is wide.Be suitable for most precision machine tool, radar and cannon etc.
Description of drawings
Fig. 1 is the course of work synoptic diagram of laser digital angle measuring method of the present invention;
Fig. 2 is the compact disk structure synoptic diagram of angle measurement unit of the present invention;
Fig. 3 is the fundamental diagram of angle measurement unit of the present invention;
Fig. 4 is the one-piece construction synoptic diagram of angle measurement unit of the present invention;
Fig. 5 is the double beams laser emitting head structural representation of angle measurement unit of the present invention;
Fig. 6 is four bundle laser beam emitting head structural representations of angle measurement unit of the present invention.
Embodiment
Do further explanation below in conjunction with accompanying drawing and instantiation:
Laser digital angle measuring method of the present invention is the radial angle line that circumferentially evenly gathers with laser ablation one circle on CD, laser reading angular line with circumferential tandem two bundle different frequencies, and the circumferential spacing of two bundle laser is less than the circumferential spacing of angle line, the circumferential width of two bundle laser is all less than the circumferential width of angle line, and determine angle direction according to the order that two bundle Laser feedback signals occur, determine angle according to the number of times that feedback signal occurs.CD is also used four circumferential equally distributed radial portion bit lines of laser ablation (representative respectively: east, south, west, north) in the angle line inboard, and determines angular regions according to the feedback signal of position line.CD is also used radial reference line of laser ablation in the angle line inboard, and determines start angle according to the feedback signal of datum line.Do further explanation below in conjunction with Fig. 1:
Its measuring process is: the laser beam emitting head emission two-way laser that two laser generators are housed projects CD to lens after lens focus, CD reflection is after enter the A step after the prismatic refraction;
Wherein the A1 step is to carry out preposition amplification after the laser pick-off head receives, and output two ways of digital signals after two frequency-selecting amplifiers are handled enters the C step after the combinational logic gate processing of circuit;
Wherein the A2 step is to be divided into the two-way laser rays through Amici prism, and output two ways of digital signals after the double reception amplifier is handled enters the C step after the combinational logic gate processing of circuit; Aforementioned two kinds of steps A 1, A2 can select to be suitable for.
The C step is: the digital signal after the combinational logic gate processing of circuit is sent add subtract counter, the output signal of add subtract counter: output angle value after data processor processes, output angle speed after time base circuit, data processor processes.
The input signal of logic gates has two-way A and B, and the combination of A and B has: 00,01,10 and 11; When being 00 and 11, no-output then; When being 01, then export forward signal, when being 10, then export reverse signal.Order according to 0 and 1 is determined sense of rotation, determines the anglec of rotation according to 0 and 1 number of times that occurs, and promptly 01 or 10 number of pulses that occur multiply by 360 degree again divided by the quantity of CD one all angle lines, are exactly the angle of rotating forward or backwards.Truth table referring to logic gates is as follows:
| The gate circuit truth table | Input | Output | ||
| A | B | Forward | Oppositely | |
| 1 | 0 | 0 | 0 | 0 |
| 2 | 0 | 1 | 0 | 1 |
| 3 | 1 | 0 | 1 | 0 |
| 4 | 1 | 1 | 0 | 0 |
Shown in Fig. 2,3,4 and 5, angle measurement unit of the present invention is by being etched with the circumferentially CD D of the even radial angle line L that gathers of two circles, and parallel double light beam bifrequency laser signal transmitter, CD feedback signal receiver and feedback signal processor and angular display unit are formed; And the circumferential spacing of two bundle laser is less than the circumferential spacing of angle line L, the circumferential width of two bundle laser is all less than the circumferential width of angle line L, feedback signal processor is determined angle direction according to the order that two bundle Laser feedback signals occur, and determines angle according to the number of times that feedback signal occurs.
Parallel double light beam bifrequency laser signal transmitter by the laser beam emitting head F that two laser generator Fa, Fb arranged side by side are installed and the lens combination T that is used to dwindle the laser beam spacing form, lens combination T is by two sub-lens t1, t2 arranged side by side and be positioned at sub-lens big lens t3 afterwards, is positioned at big lens t3 little t4 afterwards and forms.CD D feedback signal receiver is made up of a refracting prisms S and a laser pick-off R.
A circle is that fundamental line La, another circle are reference line Lb among the two circle radial angle line L, (the former is made up of Fa, Ta to be equipped with independently the laser signal transmitter separately, the latter is made up of Fb, Tb), (the former is made up of Sa and Ra CD feedback signal receiver, the latter is made up of Sb and Rb), feedback signal processor, but shared same angular display unit.
CD D and laser beam emitting head are rotated synchronously with the object of two coaxial rotation respectively, read the line segment of radius length such as the uniform equal angles of CD D imprinting with every group two bundle laser, through calculating comparison process, output rotational angle and angular velocity.CD D also uses six circumferential equally distributed radial portion bit line Lc of laser ablation in angle line L inboard, this position line Lc separate configurations single beam laser signal projector (forming) and CD feedback signal receiver (forming) by Sc and Rc by Fc, Tc, and with shared same feedback signal processor of angle line and angular display unit.
CD D also uses radial reference line Ld of laser ablation in radial portion bit line Lc inboard, this datum line Ld separate configurations single beam laser signal projector (forming) and CD feedback signal receiver (forming) by Sd and Rd by Fd, Td, and with angle line and shared same feedback signal processor of position line and angular display unit.Its working method is: laser beam emitting head F and CD D are individually fixed on the object of two rotations, when object rotates, when CD D rotates with respect to laser head, two laser generator Fa are arranged among the laser beam emitting head F, Fb, after the high frequency modulated laser that sends two different wavelength respectively passes lens Ta and Amici prism Sa and reflects after the angle line La of CD D, pass to a laser pick-off Ra by Amici prism Sa, Ra amplifies two reflector laser signals frequency-selecting respectively and receives, can obtain two paths of signals, power with each road signal changes high-low level into respectively, i.e. " 0 ", " 1 " digital signal, in-gate circuit, add subtract counter, obtain rotational angle after the computing, will export result and time base circuit and calculate, just can obtain angular velocity.
CDs such as the CD in the CD, DVD, such as the CD CD, information is recorded on the data track around the CD center of circle on it, and its orbit interval is about 1.6um, and (DVD is 0.74um at present, can be short to 0.4～0.44um, depends on optical disc types; The diameter of laser spot and numerical aperture (NA) are inversely proportional to.The NA of CD optical system is about 0.45, and DVD brings up to 0.52 even 0.6).The CD that the present invention is used is the CD of no track, the line segment of radius equal length such as equal angles in imprinting on the CD, and as the data message that reads amount of spin, this circle continuous segments called after angle line.
In order to ensure reliability and adjustment in time, and the operating mode of control measurement device, adopted two circle angle lines in the design of the present invention as shown in Figure 4: La and Lb are respectively the independent angle line that uses; And position line Lc, compensation line Ld.The purposes of position line Lc and compensation line Ld is the calculating, adjustment of the home position initial position in the actual use of measurement mechanism and to check of CD etc.
Such as: 1, if in unidirectional rotary work, when reading the Ld signal twice, the data that read La (or Lb) should all be fixed values, just need to check whether analysis measuring device is normal if any difference.2, measurement mechanism usually can rotate at both forward and reverse directions in a certain angular regions repeatedly at work, just need carry out the working condition of analysis measuring device by position line Lc.All be many " 0 ", " 1 " information in digital circuit, if error message occurred in the string data, that I guess has only one, and data are just inaccurate; Lose power supply at measurement mechanism, need know the position situation of CD angle line when reinstalling, debugging easily, it is not enough only depending on compensation line, has therefore added position line Lc.Position line Lc is many several line segments around CD center of circle equal length of imprinting, and many line segments are formed by binary coding, and each position line Lc represents the positional information at place separately.
The laser of two different modulating frequencies of laser beam emitting head F emission, after prism S delivers to receiver R, receiver R carries out frequency-selecting and amplifies the reflected signal that reception obtains two-way laser respectively, two paths of signals is done the gate circuit computing obtain direction by CD D reflection.The judgement of direction: two paths of signals is through in-gate circuit, and when being output as forward " 1 " after the computing, measurement mechanism obtains the rotation of a unit of forward; Through in-gate circuit, when being output as reverse " 1 " after the computing, measurement mechanism obtains the rotation of a reverse unit at two paths of signals.With forward, reverse output result, be input to add subtract counter again, just obtained directive rotation quantity, i.e. angle of Zhuan Donging; This output is carried out computing with time base circuit, promptly obtain angular velocity.Certainly, Computing is directly imported in the output of gate circuit, and the angle, the angular velocity that obtain are more convenient.Angle line reads the flow process demonstration, and truth table is as follows:
| The numerical value district | Corresponding situation during the relatively rotating of A laser rays, B laser rays and CD two angle lines | ||||||||||||||||||||||||||||||
| In proper order | A | B | AB | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
| 1 | 1 | 1 | 11 | A1 | B1 | ||||||||||||||||||||||||||
| 2 | 1 | 0 | 10 | A2 | B2 | ||||||||||||||||||||||||||
| 3 | 0 | 0 | 00 | A3 | B3 | ||||||||||||||||||||||||||
| 4 | 0 | 0 | 00 | A4 | B4 | ||||||||||||||||||||||||||
| 5 | 0 | 0 | 00 | A5 | B5 | ||||||||||||||||||||||||||
| 6 | 0 | 1 | 01 | A6 | B6 | ||||||||||||||||||||||||||
| 7 | 1 | 1 | 11 | A7 | B7 | ||||||||||||||||||||||||||
| 8 | 1 | 0 | 10 | A8 | B8 | ||||||||||||||||||||||||||
| 9 | 0 | 0 | 00 | A9 | B9 | ||||||||||||||||||||||||||
| 10 | 0 | 0 | 00 | A10 | B10 | ||||||||||||||||||||||||||
| 11 | 0 | 0 | 00 | A11 | B11 | ||||||||||||||||||||||||||
| 12 | 0 | 1 | 01 | A12 | B12 | ||||||||||||||||||||||||||
| 13 | 1 | 1 | 11 | A13 | B13 | ||||||||||||||||||||||||||
| 14 | 1 | 0 | 10 | A14 | B14 | ||||||||||||||||||||||||||
| 15 | 0 | 0 | 00 | A15 | B15 | ||||||||||||||||||||||||||
| 16 | 0 | 0 | 00 | A16 | B16 | ||||||||||||||||||||||||||
| 17 | 0 | 0 | 00 | A17 | B17 | ||||||||||||||||||||||||||
| 18 | 0 | 1 | 01 | A18 | B18 | ||||||||||||||||||||||||||
| 19 | 1 | 1 | 11 | A19 | B19 | ||||||||||||||||||||||||||
| 20 | 1 | 0 | 10 | A20 | B20 | ||||||||||||||||||||||||||
| In proper order | A | B | AB | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 | 0 | 0 | 0 | 1 | 1 | 0 |
Illustrate: after 00 is 01: forward output; After 00 is 10: oppositely output.Certainly after in like manner can getting 11 is 01: forward output; After 11 is 10: oppositely output or the like.
In order to allow this measurement mechanism work stably in a long term, especially CD reduces erosion, and with the structure of this measurement mechanism internal production for sealing, axle head uses encapsulant to handle, and charges into inert gas then.Be generally normal pressure and get final product, but, the filling mouth of inert gas is installed on this measurement mechanism in order to increase the reliability that inert gas is filled; And the gas cylinder that will be full of compressed inert directly is fixed on this measurement mechanism, and inserts and fill mouthful.
In this measurement mechanism work, if detect operating error or fault, can not in time change the operate as normal that just may influence equipment, therefore on a CD, make two circle or multi-turn angle line and other data lines, two cover/quadruplets are installed simultaneously or are overlapped laser beam emitting head and required processor more, its inner work system can not only be in time changed, detection can also be in the work of reading, effectively supervised.
This type of angle measurement unit often is installed in the axle head of equipment, in order to leave the installation site on the adaptation equipment miscellaneous part or measurement mechanism, the rotation axis of laser digital angle measurement unit is made as sleeve shaped, can inlay like this and be enclosed within on the equipment axis, therefore the enlarged diameter of the endoporus of CD,, measurement mechanism can inlay the mode that cover uses so that can being made into.
The laser digital angle measurement unit is in vibrations shake environment, and guarantee physical strength, except strengthening structure, device and installing and fixing, CD is thickeied exponentially, general disk thickness is about 1.2 to 1.8 millimeters less than 2 millimeters, uses the CD of twice or several times thickening in the laser digital angle measurement unit, and employing and rigid material composite methods, the degree of deformation of reduction CD.
Described measurement mechanism is used in order to have widely, adapt to the equipment that influences rotate little, cost is low, in light weight, requirement such as the space is little, can be with the disc making of laser digital angle measurement unit less than 80 millimeters, less than 60 millimeters CDs.It uses the scope of application to increase.
The accurate more data that obtain for the laser digital angle measurement unit, in making, improve degree of accuracy, can also increase considerably the outside dimension of CD, not only greater than 120 millimeters, greater than 240 millimeters, be fabricated to CD greater than 320 millimeters, adopt reinforcement CD intensity to use simultaneously and meet the method for CD, as make the CD of 1 rice diameter.Obtain more accurate angle-data.
As shown in Figure 6,, be convenient to debugging etc., 4 laser generator Fn are installed in a laser beam emitting head F in order to improve reliability.
Claims (8)
1, a kind of laser digital angle measuring method, it is characterized in that on CD with the circumferentially evenly densely covered radial angle line of at least one circle of laser ablation, laser reading angular line with circumferential tandem two bundle different frequencies, and the circumferential spacing of two bundle laser is less than the circumferential spacing of angle line, the circumferential width of two bundle laser is all less than the circumferential width of angle line, and determine angle direction according to the order that two bundle Laser feedback signals occur, determine angle according to the number of times that feedback signal occurs.
2, laser digital angle measuring method according to claim 1, it is characterized in that CD in the angle line inboard also with many circumferential equally distributed radial portion bit lines of laser ablation, and determine angular regions according to the feedback signal of position line.
3, laser digital angle measuring method according to claim 1 is characterized in that CD also uses radial reference line of laser ablation in the angle line inboard, and determines start angle according to the feedback signal of datum line.
4, according to claim 1,2 or 3 described laser digital angle measuring methods, it is characterized in that being equipped with the parallel laser of the laser beam emitting head emission two bundle different frequencies of two laser generators arranged side by side, through projecting the radial angle line zone of CD after the lens focus, the CD feedback signal is after prismatic refraction; Or received by the laser pick-off head, after two frequency-selecting amplifiers amplifications, two ways of digital signals is sent the combinational logic gate processing of circuit, or be divided into the two-way laser rays by Amici prism, the two-way laser rays converts two ways of digital signals to by the double reception amplifier, and two ways of digital signals is sent the combinational logic gate processing of circuit; Digital signal after the combinational logic gate processing of circuit is sent add subtract counter; The output signal of add subtract counter or after data processor processes the output angle value, or after time base circuit, data processor processes output angle speed.
5, be used to implement the angle measurement unit of the described method of claim 1, by being etched with the circumferentially CD of the even radial angle line that gathers of at least one circle, parallel double light beam bifrequency laser signal transmitter, CD feedback signal receiver and feedback signal processor and angular display unit are formed; And the circumferential spacing of two bundle laser is less than the circumferential spacing of angle line, the circumferential width of two bundle laser is all less than the circumferential width of angle line, feedback signal processor is determined angle direction according to the order that two bundle Laser feedback signals occur, and determines angle according to the number of times that feedback signal occurs; CD in the angle line inboard also with many circumferential equally distributed radial portion bit lines of laser ablation, this position line separate configurations laser signal transmitter and CD feedback signal receiver, and with shared same feedback signal processor of angle line and angular display unit, it is characterized in that CD also uses radial reference line of laser ablation in the angle line inboard, this datum line separate configurations laser signal transmitter and CD feedback signal receiver, and with angle line and shared same feedback signal processor of position line and angular display unit.
6, angle measurement unit according to claim 5, it is characterized in that the radial angle line is for radially and two circles of column distribution, each encloses the radial angle line and is equipped with independently laser signal transmitter, CD feedback signal receiver, feedback signal processor, but shared same angular display unit.
7, according to claim 5 or 6 described angle measurement units, it is characterized in that parallel double light beam bifrequency laser signal transmitter is made up of the lens that two laser generators arranged side by side and being used to dwindle the laser beam spacing, CD feedback signal receiver is by the feedback signal of refracting prisms reception from CD.
8,, it is characterized in that CD, laser signal transmitter, CD feedback signal receiver and measured axle are packed in the inert gas filled confined space jointly according to claim 5 or 6 described angle measurement units.
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| CN101561264B (en) * | 2008-04-16 | 2012-06-27 | 深圳市凯利博实业有限公司 | Angel measuring instrument and measuring method |
| CN107817501B (en) * | 2017-10-27 | 2021-07-13 | 广东电网有限责任公司机巡作业中心 | Point cloud data processing method with variable scanning frequency |
| DE102019218270A1 (en) * | 2018-12-11 | 2020-06-18 | Aktiebolaget Skf | A system and method for determining angular displacement, speed and acceleration of a rotating member attached to a platform |
| CN110095091A (en) * | 2019-05-13 | 2019-08-06 | 哈尔滨理工大学 | A kind of Small angle measuring instrument and its measurement method |
Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4289404A (en) * | 1979-09-27 | 1981-09-15 | Standard Oil Company (Indiana) | Laser-based deflection measuring method and apparatus |
| JPS59211810A (en) * | 1983-05-17 | 1984-11-30 | Citizen Watch Co Ltd | Fine angle measuring apparatus by light heterodyne interference method |
| CN2105667U (en) * | 1991-11-12 | 1992-05-27 | 东北工学院 | Laser measurer for torsional angle |
| CN1527025A (en) * | 2003-09-19 | 2004-09-08 | 南开大学 | Electrooptical angle measurer |
| CN2769851Y (en) * | 2005-02-08 | 2006-04-05 | 王治平 | Laser digital angle measuring sensor |
-
2005
- 2005-02-08 CN CNB200510011334XA patent/CN1306245C/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4289404A (en) * | 1979-09-27 | 1981-09-15 | Standard Oil Company (Indiana) | Laser-based deflection measuring method and apparatus |
| JPS59211810A (en) * | 1983-05-17 | 1984-11-30 | Citizen Watch Co Ltd | Fine angle measuring apparatus by light heterodyne interference method |
| CN2105667U (en) * | 1991-11-12 | 1992-05-27 | 东北工学院 | Laser measurer for torsional angle |
| CN1527025A (en) * | 2003-09-19 | 2004-09-08 | 南开大学 | Electrooptical angle measurer |
| CN2769851Y (en) * | 2005-02-08 | 2006-04-05 | 王治平 | Laser digital angle measuring sensor |
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