CN216283273U - Grating scale with accurate positioning - Google Patents
Grating scale with accurate positioning Download PDFInfo
- Publication number
- CN216283273U CN216283273U CN202122973212.6U CN202122973212U CN216283273U CN 216283273 U CN216283273 U CN 216283273U CN 202122973212 U CN202122973212 U CN 202122973212U CN 216283273 U CN216283273 U CN 216283273U
- Authority
- CN
- China
- Prior art keywords
- grating ruler
- base
- grating
- accurate positioning
- positioning
- 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.)
- Active
Links
Images
Landscapes
- Length Measuring Devices By Optical Means (AREA)
Abstract
The utility model relates to the technical field of grating scales, in particular to a grating scale with accurate positioning. The utility model has simple structure, can pick up regular on-off when the correlation type photoelectric switch moves, the on-off signal can be read and counted by the decoding module, the aim of mobile positioning and repeated positioning can be realized by utilizing the on-off signal obtained by counting, the decoding module can be set into any number of on-off signals according to the application requirement, namely, the positioning with any length can be realized, any personalized requirement can be met, and the functions of accurate single positioning and complex repeated positioning can be realized.
Description
Technical Field
The utility model relates to the technical field of grating scales, in particular to a grating scale with accurate positioning.
Background
Along with the rapid development of optical technology, optical measurement technology has also been correspondingly developed, a grating ruler displacement sensor, called grating ruler for short, is widely applied to the measurement of mechanical angular displacement or linear displacement of a closed-loop servo system of a numerical control machine tool, the grating ruler displacement sensor is a precision measurement feedback device working by using the optical principle of the grating, and comprises a scale grating and a grating reading head, wherein the scale grating is usually fixed on a movable part of the machine tool, the grating reading head is arranged on a fixed part of the machine tool, and an indication grating is arranged in the grating reading head;
at present, the known grating ruler for the tool for precisely measuring the movement displacement of an object mainly comprises an incremental type grating ruler and an absolute type grating ruler, and the absolute type grating ruler does not need to search a reference origin, can measure the position when power is supplied again after power is cut off, does not need to return to zero, has high measurement precision, strong anti-interference capability, high stability and large absolute coding range, can measure the linear displacement of a large range, and can also carry out nonlinear correction, so the absolute type grating ruler is more and more widely applied to the industry as the position measuring tool.
The utility model discloses a grating ruler reading head, a grating ruler joint and a grating ruler displacement sensor in Chinese patent (application number: CN201910334027.7), wherein a first reading sensor and a second reading sensor which are arranged along the moving direction of a grating ruler are used for reading the displacement value of the grating ruler in the moving process in real time, then whether the displacement value passes through the connected gap position of a ruler grating is judged according to the displacement value difference of the first reading sensor and the second reading sensor, the displacement value of the grating ruler passing through the gap position is subjected to gap compensation to obtain a displacement output value with high precision, the displacement measurement precision of the grating ruler displacement sensor is effectively improved, the grating ruler displacement measurement length range is increased by splicing the ruler gratings on the basis of ensuring the displacement measurement precision of the grating ruler, and the structure needs a plurality of groups of sensors, so that the technology has the defects of high price and high application starting point, and output signals can be analyzed and processed by matched equipment, and the flexibility is not enough, and the personalized requirements of the current market cannot be met. Therefore, those skilled in the art provide a grating ruler with accurate positioning to solve the problems mentioned in the background art.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a grating ruler with accurate positioning to solve the problems in the background technology.
In order to achieve the purpose, the utility model provides the following technical scheme: a grating ruler with accurate positioning comprises a hardware part and a decoding module, wherein the hardware part comprises a base, a grating ruler is installed on the upper surface of the base, light transmission holes are formed in the grating ruler at equal intervals, an installation seat is installed at one end of the upper surface of the base, a servo motor is installed on one side of the installation seat, a lead screw penetrating through the installation seat is installed at the output end of the servo motor, a connecting seat is connected to the lead screw through threads, and a correlation type photoelectric switch in sliding connection with the grating ruler is installed on the front surface of the connecting seat;
the decoding module comprises a counter, a coder-decoder, a position data memory and a comparator, wherein the output end of the position data memory is connected with the input end of the coder-decoder through a wire, the output end of the coder-decoder is electrically connected with the input end of the counter, and the input end of the comparator is electrically connected with the output ends of the counter and the coder-decoder respectively.
As a further aspect of the utility model: the width of the light holes is the same as that of the correlation type photoelectric switch, and the distance between every two adjacent light holes is the same as that of the light holes.
As a further aspect of the utility model: the upper surface of the base is positioned on the back side of the grid ruler and provided with a slide rail, and the lower end of the connecting seat is provided with a slide groove in sliding connection with the slide rail.
As a further aspect of the utility model: the mounting holes are formed in the upper surface of the base at equal intervals, and the anti-slip pad is mounted on the lower surface of the base.
Compared with the prior art, the utility model has the beneficial effects that: the correlation photoelectric switch is arranged on the grid ruler, regular on-off can be picked up when the optical correlation photoelectric switch moves, the on-off signals can be read and counted by the decoding module, the purpose of mobile positioning and repeated positioning can be realized by using the on-off signals obtained by counting, the decoding module can be set to be the on-off signals of any number according to application requirements, positioning of any length can be realized, any personalized requirements can be met, the functions of accurate single positioning and complex repeated positioning can be realized, and the advantages of simple structure, low cost, flexible personalized design and small batch requirements can be realized.
Drawings
FIG. 1 is a schematic structural diagram of a grating ruler with accurate positioning;
FIG. 2 is a schematic view of a mounting structure of a connecting seat in an accurately positioned grating ruler;
FIG. 3 is a timing diagram of positioning count and logic level in a grating ruler with accurate positioning;
fig. 4 is a schematic diagram of the operation principle of a grating ruler with accurate positioning.
In the figure: 1. a base; 2. a grid ruler; 3. a light-transmitting hole; 4. a mounting seat; 5. a connecting seat; 6. a servo motor; 7. a screw rod; 8. a correlation type photoelectric switch; 9. a chute; 10. a slide rail.
Detailed Description
Referring to fig. 1 to 4, in an embodiment of the present invention, a grating ruler with accurate positioning includes a hardware portion and a decoding module, the hardware portion includes a base 1, a grating ruler 2 is installed on an upper surface of the base 1, light holes 3 are formed on the grating ruler 2 at equal intervals, an installation seat 4 is installed at one end position of the upper surface of the base 1, a servo motor 6 is arranged on one side of the mounting seat 4, a screw rod 7 penetrating through the mounting seat 4 is arranged at the output end of the servo motor 6, a connecting seat 5 is connected on the screw rod 7 through threads, a correlation type photoelectric switch 8 connected with the grid ruler 2 in a sliding way is arranged on the front surface of the connecting seat 5, when in use, the servo motor 6 is started to enable the screw rod 7 to rotate, and through the threaded connection between the screw rod 7 and the connecting seat 5, under the sliding connection between the sliding chute 9 and the sliding rail 10, the connecting seat 5 is drawn to move horizontally, and then the correlation type photoelectric switch 8 moves on the grating ruler 2;
the decoding module comprises a counter, a coder-decoder, a position data memory and a comparator, wherein the output end of the position data memory is connected with the input end of the coder-decoder through an electric wire, the output end of the coder-decoder is electrically connected with the input end of the counter, the input end of the comparator is electrically connected with the output ends of the counter and the coder-decoder respectively, when the correlation type photoelectric switch 8 is arranged in a first grid light-transmitting hole 3 on the grid ruler 2, infrared light emitted by the correlation type photoelectric switch 8 is shielded, at the moment, the correlation type photoelectric switch 8 does not output, namely, the output end is a low level '0', when the correlation type photoelectric switch 8 moves to the right for one grid, the light-transmitting hole 3 is opened, infrared light emitted by the correlation type photoelectric switch 8 is received, at the moment, the correlation type photoelectric switch 8 outputs, namely, the high level '1', therefore, when the correlation type photoelectric switch 8 moves and positions, only the accurate pulse number of a target position needs to be determined, the number of pulses in a certain number represents a certain length, when repeated positioning is to be realized for multiple times within a certain distance, the number of pulses in the target position is calculated, and the decoding module considers that the target position is reached after receiving the corresponding number of pulses and outputs a corresponding position signal.
In fig. 1, the width of the light-transmitting hole 3 is the same as the width of the opposite-type photoelectric switch 8, and the distance between two adjacent light-transmitting holes 3 is the same as the width of the light-transmitting hole 3, so that the accuracy in positioning is improved.
In fig. 2, a slide rail 10 is installed on the upper surface of the base 1 at the back side of the grid ruler 2, a slide groove 9 connected with the slide rail 10 in a sliding manner is formed at the lower end of the connecting seat 5, and the stability of the movement of the connecting seat 5 is improved through the sliding connection between the slide groove 9 and the slide rail 10.
In fig. 1, mounting holes are formed in the upper surface of a base 1 at equal intervals, and anti-slip pads are mounted on the lower surface of the base 1, so that the stability of the equipment after being mounted is improved.
The working principle of the utility model is as follows: when in use, the servo motor 6 is started to enable the screw rod 7 to rotate, through threaded connection between the screw rod 7 and the connecting seat 5, under sliding connection between the sliding groove 9 and the sliding rail 10, the connecting seat 5 is pulled to move horizontally, then the correlation type photoelectric switch 8 is enabled to move on the grid ruler 2, when the correlation type photoelectric switch 8 is arranged in the first grid light-transmitting hole 3 on the grid ruler 2, infrared light emitted by the correlation type photoelectric switch 8 is shielded, at the moment, the correlation type photoelectric switch 8 has no output, namely, low level '0', when the correlation type photoelectric switch 8 moves to the right for one grid, the light-transmitting hole 3 is opened, infrared light emitted by the correlation type photoelectric switch 8 is received, at the moment, the correlation type photoelectric switch 8 has output, namely, high level '1', therefore, when the correlation type photoelectric switch 8 is moved and positioned, only the accurate pulse number of a target position needs to be determined, the number of pulses in a certain number represents a certain length, when repeated positioning is to be realized for multiple times within a certain distance, the number of pulses in the target position is calculated, and the decoding module considers that the target position is reached after receiving the corresponding number of pulses and outputs a corresponding position signal.
The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any person skilled in the art should be considered to be within the scope of the present invention, and the technical solutions and the utility model concepts of the present invention are equivalent to or changed within the scope of the present invention.
Claims (4)
1. The grating ruler with the accurate positioning function is characterized by comprising a hardware part and a decoding module, wherein the hardware part comprises a base (1), a grating ruler (2) is mounted on the upper surface of the base (1), light holes (3) are formed in the grating ruler (2) at equal intervals, a mounting seat (4) is mounted at one end of the upper surface of the base (1), a servo motor (6) is mounted on one side of the mounting seat (4), a lead screw (7) penetrating through the mounting seat (4) is mounted at the output end of the servo motor (6), a connecting seat (5) is connected onto the lead screw (7) through threads, and a correlation type photoelectric switch (8) in sliding connection with the grating ruler (2) is mounted on the front surface of the connecting seat (5);
the decoding module comprises a counter, a coder-decoder, a position data memory and a comparator, wherein the output end of the position data memory is connected with the input end of the coder-decoder through a wire, the output end of the coder-decoder is electrically connected with the input end of the counter, and the input end of the comparator is electrically connected with the output ends of the counter and the coder-decoder respectively.
2. A grating ruler with accurate positioning as claimed in claim 1, characterized in that the width of the light holes (3) is the same as the width of the correlation type photoelectric switch (8), and the distance between two adjacent light holes (3) is the same as the width of the light holes (3).
3. The grating ruler with accurate positioning as claimed in claim 1, wherein the upper surface of the base (1) is provided with a slide rail (10) at the back side of the grating ruler (2), and the lower end of the connecting seat (5) is provided with a slide groove (9) slidably connected with the slide rail (10).
4. The grating ruler with accurate positioning as claimed in claim 1, wherein the upper surface of the base (1) is provided with mounting holes at equal intervals, and the lower surface of the base (1) is provided with a non-slip mat.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122973212.6U CN216283273U (en) | 2021-11-30 | 2021-11-30 | Grating scale with accurate positioning |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122973212.6U CN216283273U (en) | 2021-11-30 | 2021-11-30 | Grating scale with accurate positioning |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216283273U true CN216283273U (en) | 2022-04-12 |
Family
ID=81040377
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122973212.6U Active CN216283273U (en) | 2021-11-30 | 2021-11-30 | Grating scale with accurate positioning |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216283273U (en) |
-
2021
- 2021-11-30 CN CN202122973212.6U patent/CN216283273U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US4008523A (en) | Digital electro-optical micrometer and gages | |
| CN105627921A (en) | Absolute encoder subdivision acquisition system and measurement method thereof | |
| CN203140492U (en) | Automatic alignment device for elevator guide rail | |
| CN103994723A (en) | Macro and micro composite grating ruler measurement system based on vertical and horizontal transformation amplification segmentation | |
| CN102661707A (en) | Universal calibrating device for linear displacement | |
| CN108362206A (en) | A kind of non-contact displacement transducer based on capacitive grating | |
| CN101579908B (en) | Calendar on-line thickness-measuring device | |
| CN212300247U (en) | Detection system for dynamic error of grating ruler | |
| CN103411635A (en) | Code micro-macro combined collection method of absolute grating ruler | |
| CN216283273U (en) | Grating scale with accurate positioning | |
| CN210981144U (en) | Glass overall dimension detects platform | |
| CN105486213A (en) | Digital displaying scale and measurement method thereof | |
| CN211291322U (en) | Detection and calibration system of magnetostrictive displacement sensor | |
| CN105157583A (en) | Axle journal length measurement system | |
| CN103322919A (en) | Grating ruler and method for finding null position of grating ruler quickly | |
| CN203869666U (en) | Macro-micro composite raster ruler measuring system based on vertical and horizontal conversion, amplification and subdivision | |
| EP3748284A1 (en) | Digital displacement sensor, and displacement measurement method for same | |
| CN104132609A (en) | Electromagnetic grid ruler structure and displacement information reading method thereof | |
| CN210070852U (en) | Grating ruler service life tester | |
| CN113418440A (en) | Non-contact position detection method | |
| CN103808244A (en) | Magnetic encoder for position measurement | |
| CN2794697Y (en) | Photoelectric detector for intelligent digital control lathe | |
| CN2553338Y (en) | Dial gage automatic detector | |
| CN203323704U (en) | Grating ruler with quickly-found zero position | |
| CN109459116B (en) | Water level meter with high-precision monitoring |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |