CN104567743A - Angle displacement measurement device and measurement method thereof - Google Patents
Angle displacement measurement device and measurement method thereof Download PDFInfo
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- CN104567743A CN104567743A CN201510007788.3A CN201510007788A CN104567743A CN 104567743 A CN104567743 A CN 104567743A CN 201510007788 A CN201510007788 A CN 201510007788A CN 104567743 A CN104567743 A CN 104567743A
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Abstract
The invention discloses an angle displacement measurement device, and belongs to the field of coders. The device comprises a light source, a light chopper, a lens, a light-sensitive array element and a signal processing system. The light chopper surrounds and wraps the light source, a gap is formed in the light chopper, the lens is mounted above the gap, and the light-sensitive array element is located on the outer side of the lens and surrounds and wraps the light chopper. Meanwhile, the invention discloses a measurement method of the device. The new method is provided for angle displacement measurement, the structure is simple, manufacturing difficulty is lowered, the production period is shortened, production cost is lowered, and the technological problem that measurement precision of an existing coder is limited by a code disk is solved.
Description
Technical field
The present invention relates to measurement mechanism, relate to a kind of angle displacement measuring device and measuring method thereof particularly.
Background technology
Displacement transducer to be gathered around as lathe, robot, production line, elevator etc. at industrial circle and is widely used, the service precision of these machine tools depends on the precision of displacement transducer to a great extent, and displacement transducer widely uses the most with scrambler, can measured angular displacement or straight-line displacement.Scrambler most is at present the device of core with photoelectric code disk based on grating process, and the dividing precision of photoelectric code disk determines the service precision of scrambler, and the precision of photoelectric code disk is higher, and its difficulty of processing is also higher, and the process-cycle is longer, and cost of manufacture is huge.
Summary of the invention
The object of the present invention is to provide a kind of angle displacement measuring device to solve the technical matters of prior art scrambler measuring accuracy by photoelectric code disk limitation.
To achieve these goals, the invention provides following technical scheme:
Angle displacement measuring device, comprise light source, dimmer, lens, light-sensitive array element and signal processing system, described dimmer is around the described light source of parcel, described dimmer has a gap, shown lens are installed on above this gap, described light-sensitive array element is positioned at outside these lens and around the described dimmer of parcel, described light-sensitive array element is the array of integrated photosensitive unit, and the light signal for being sent by light source is converted to electric signal and exports.During the work of this device, by shaft coupling, dimmer and measured axis are connected, the bright whole dimmer space of the illumination that light source sends, lens are assembled together by supportive device and dimmer and make lens make synchronous rotary together with measured axis to move, when dimmer rotates, the light therethrough gap of its inside, form the Line of light of movement, through the synchronizing focus of lens, can prevent light pinhole imaging system from amplifying, light focusing is radiated on light-sensitive array element, namely the array photosensitive unit of the light on light-sensitive array element produces signal, the column position of the light-sensitive array cellular array that this light is the strongest is the angular displacement position of current measured axis.
One as the technical program is improved, described signal processing system comprises signal screening unit, position operation processing unit, this signal screening unit is used for screening the electric signal exported from light-sensitive array element, this position operation processing unit is used for calculating the signal that this light-sensitive array element group filters out, and calculates the absolute rotational position of measured axis corresponding to hot spot.
Meanwhile, present invention also offers the measuring method of this Novel angle displacement measuring device, specifically comprise the following steps:
S1, to be connected with measured axis by the dimmer of shaft coupling by this device, to make dimmer and measured axis do synchronous rotary and move, light source energising simultaneously, emits beam;
The light therethrough gap that S2, light source send, forms the Line of light of movement, and through the synchronizing focus of lens, converge on light-sensitive array element, namely the photosensitive unit of light produces electric signal;
Signal screening unit in S3, signal processing system screens the generation electric signal in step S2, filters out the electric signal that opto-electronic conversion is the strongest, and is exported by the column address i at photosensitive unit place corresponding for electric signal the strongest for this opto-electronic conversion;
Position operation processing unit in S4, data processing module to the column address i exported in step S3 carry out identification calculate, calculate measured axis angle;
S5, step S4 is drawn measured axis angular position information export.
Wherein, the identification computing method in described step S4 are:
The corresponding dimmer gap position of definition first row photosensitive unit is for rotating initial point 0 °;
Wherein:
for the angle of measured axis;
A is the photosensitive unit columns of light activated element sensitive volume;
I is that opto-electronic conversion is the most abundant, the column address at the photosensitive unit place that the electric signal that namely most opto-electronic conversion is the strongest is corresponding.
The present invention compared with prior art, has following technical advantage:
This device forms an angle displacement measuring device with light source, dimmer, lens, light-sensitive array element and signal processing system, for Angular Displacement Detecting provides a kind of new method, structure is simple, reduce manufacture difficulty, shorten the production cycle, reduce production cost, solve the technical difficult problem of existing scrambler measuring accuracy by code-disc limitation; To each anglec of rotation of measured axis, this device can go to identify by the rank addresses of photosensitive unit, has absolute position encoder function; After this device power-off restarting, the position of measured axis before power-off can be identified, therefore during power-off, positional information can not be lost.
Accompanying drawing explanation
Fig. 1 is the structural representation of angle displacement measuring device in embodiment one;
Fig. 2 is lens functions schematic diagram;
Fig. 3 is signal processing system schematic diagram;
Fig. 4 is photosensitive-cell array schematic diagram;
Fig. 5 is angle displacement measuring device measurement procedure figure;
In figure: light source 1, dimmer 2, lens 3, light-sensitive array element 4, signal processing system 5, gap 21, signal screening unit 51, position operation processing unit 52.
Embodiment
Accompanying drawing, only for exemplary illustration, can not be interpreted as the restriction to this patent.
To those skilled in the art, in accompanying drawing, some known features and explanation thereof may be omitted is understandable.
Below in conjunction with drawings and Examples, be clearly and completely described the technical scheme in the present invention, obviously, described embodiment is only a part of embodiment of invention, instead of whole embodiments.Based on the embodiment in the present invention, those of ordinary skill in the art, not making the every other embodiment obtained under creative work prerequisite, belong to the scope of protection of the invention.
Embodiment one
As described in Figure 1, for the structural representation of the present embodiment angle displacement measuring device, comprise light source 1, dimmer 2 is around the described light source 1 of parcel, this dimmer 2 has a gap 21, when lens 3 are installed on 21(practical application above this gap, lens 3 are assembled together by supportive device and dimmer 2), as shown in Figure 2, light is through the synchronizing focus of lens 3, can prevent light pinhole imaging system from amplifying, thus light focusing is radiated on light-sensitive array element 4, described light-sensitive array element 4 to be positioned at outside these lens 1 and around the described dimmer 2 of parcel, signal processing system (Fig. 1 does not show) is connected (Fig. 1 does not show) with described light-sensitive array element 4, as shown in Figure 3, described signal processing system 5 comprises signal screening unit 51, position operation processing unit 52, this signal screening unit 51 is for screening the electric signal exported from light-sensitive array element 4, this position operation processing unit 52 calculates for the signal filtered out this light-sensitive array element 4, calculate the absolute rotational position of measured axis corresponding to hot spot, described light-sensitive array element 4 is arrays of integrated photosensitive unit, array schematic diagram as shown in Figure 4, the uniqueness of the ranks arrangement position of the photosensitive unit in array makes the position of rotation of corresponding measured axis also have uniqueness, therefore, the measurement of this device is absolute type.
Embodiment two
The present embodiment is the measuring method of angle displacement measuring device, as shown in Figure 5, specifically comprises the following steps:
S1, to be connected with measured axis by the dimmer of shaft coupling by this device, to make dimmer and measured axis do synchronous rotary and move, light source energising simultaneously, emits beam;
The light therethrough gap that S2, light source send, forms the Line of light of movement, and through the synchronizing focus of lens, converge on light-sensitive array element, namely the photosensitive unit of light produces electric signal;
Signal screening unit in S3, signal processing system screens the generation electric signal in step S2, filters out the electric signal that opto-electronic conversion is the strongest, and is exported by the column address i at photosensitive unit place corresponding for electric signal the strongest for this opto-electronic conversion;
Position operation processing unit in S4, data processing module to the column address i exported in step S3 carry out identification calculate, calculate measured axis angle;
S5, step S4 is drawn measured axis angular position information export.
Wherein, the identification computing method in described step S4 are:
The corresponding dimmer gap position of definition first row photosensitive unit is for rotating initial point 0 °;
Wherein:
for the angle of measured axis;
A is the photosensitive unit columns of light activated element sensitive volume;
I is that opto-electronic conversion is the most abundant, the column address at the photosensitive unit place that the electric signal that namely opto-electronic conversion is the strongest is corresponding.
Embodiment three
In the present embodiment, the circle diameter of the photosurface of the light in light-sensitive array element is 40mm, and after light focusing, Line of light is wide is 3um, and photosensitive unit is of a size of 2.2um*2.2um, then the photosensitive unit columns that photosurface is covered with is
.With first row photosensitive unit for initial point is encoded, namely define corresponding dimmer gap position herein for rotating initial point 0 °, the position of rotation current to tested rotary body, Line of light gathers the i-th row, then the current anglec of rotation is
.Because in the present embodiment, the width of Line of light is greater than the size of photosensitive unit, there are two row light activated element light in each moment, how many powers that namely photosensitive unit exports electric signal of contrast light income determine the value of i, and that address arranged now selecting light income many is current i value.
More than that better enforcement of the present invention is illustrated, but the invention is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent variations or replacement under the prerequisite without prejudice to spirit of the present invention, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (5)
1. an angle displacement measuring device, it is characterized in that, comprise light source, dimmer, lens, light-sensitive array element and signal processing system, described dimmer is around the described light source of parcel, described dimmer has a gap, shown in lens be installed on above this gap, described light-sensitive array element to be positioned at outside these lens and around the described dimmer of parcel.
2. a kind of angle displacement measuring device as claimed in claim 1, is characterized in that, described light-sensitive array element is the array of integrated photosensitive unit, and the light signal for being sent by light source is converted to electric signal and exports.
3. a kind of angle displacement measuring device as claimed in claim 1, it is characterized in that, described signal processing system comprises signal screening unit, position operation processing unit, this signal screening unit is used for screening the electric signal exported from light-sensitive array element, this position operation processing unit is used for calculating the signal that this light-sensitive array element group filters out, and calculates the absolute rotational position of measured axis corresponding to hot spot.
4. the measuring method of a kind of angle displacement measuring device as claimed in claim 1, is characterized in that, comprise the following steps:
S1, to be connected with measured axis by the dimmer of shaft coupling by this device, to make dimmer and measured axis do synchronous rotary and move, light source energising simultaneously, emits beam;
The light therethrough gap that S2, light source send, forms the Line of light of movement, and through the synchronizing focus of lens, converge on light-sensitive array element, namely the photosensitive unit of light produces electric signal;
Signal screening unit in S3, signal processing system screens the generation electric signal in step S2, filters out the electric signal that opto-electronic conversion is the strongest, and is exported by the column address i at photosensitive unit place corresponding for electric signal the strongest for this opto-electronic conversion;
Position operation processing unit in S4, data processing module to the column address i exported in step S3 carry out identification calculate, calculate measured axis angle;
S5, step S4 is drawn measured axis angular position information export.
5. the measuring method of a kind of angle displacement measuring device as claimed in claim 4, is characterized in that, the identification computing method in described step S4 are:
The corresponding dimmer gap position of definition first row photosensitive unit is for rotating initial point 0 °;
Wherein:
for the angle of measured axis;
A is the photosensitive unit columns of light activated element sensitive volume;
I is that opto-electronic conversion is the most abundant, the column address at the photosensitive unit place that the electric signal that namely opto-electronic conversion is the strongest is corresponding.
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108088362A (en) * | 2016-11-23 | 2018-05-29 | 普瑞有限公司 | Rotary regulator with improved optical rotary position detection performance |
| CN108871546A (en) * | 2018-07-02 | 2018-11-23 | 陕西理工大学 | A kind of swing rod parameter measuring device for motion, method and system |
| CN109211147A (en) * | 2018-10-22 | 2019-01-15 | 上海海事大学 | Two-electron atom bridge crane swing angle testing agency and measurement method based on light-sensitive element |
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Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108088362A (en) * | 2016-11-23 | 2018-05-29 | 普瑞有限公司 | Rotary regulator with improved optical rotary position detection performance |
| CN108871546A (en) * | 2018-07-02 | 2018-11-23 | 陕西理工大学 | A kind of swing rod parameter measuring device for motion, method and system |
| CN108871546B (en) * | 2018-07-02 | 2020-06-09 | 陕西理工大学 | Device, method and system for measuring motion parameters of oscillating bar |
| CN109211147A (en) * | 2018-10-22 | 2019-01-15 | 上海海事大学 | Two-electron atom bridge crane swing angle testing agency and measurement method based on light-sensitive element |
| WO2020082764A1 (en) * | 2018-10-22 | 2020-04-30 | 上海海事大学 | Detection mechanism for swing angle of bridge crane with dual lifting appliances based on photosensitive element and measurement method |
| CN109211147B (en) * | 2018-10-22 | 2020-06-02 | 上海海事大学 | Double-lifting-appliance bridge crane swing angle detection mechanism based on photosensitive element and measurement method |
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Inventor after: Liu Zhicheng Inventor after: Wang Xinli Inventor before: Wang Xinli |
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Application publication date: 20150429 |