Check patentability & draft patents in minutes with Patsnap Eureka AI!

Positioning apparatus

A positioning device and relative position technology, which is applied in the direction of converting sensor output, measuring devices, instruments, etc., can solve problems such as multi-time, difficult to select initialization, and difficult initialization

Inactive Publication Date: 2009-09-16
KONINK PHILIPS ELECTRONICS NV
View PDF0 Cites 3 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

First of all, it is undesirable to have the platform collide with the stop
Also, it is difficult to choose the proper speed for initialization: the controller does not know where the platform is, i.e., far away from the stop or very close to it
In order to reduce the risk of collision at high speed, the displacement speed must be set relatively low, but if the platform is far from the stop, the initialization process takes more time
Also, in the case of a platform with six degrees of freedom, this initialization can be quite difficult

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Positioning apparatus
  • Positioning apparatus
  • Positioning apparatus

Examples

Experimental program
Comparison scheme
Effect test

example 1

[0036] Assume that the pitch of the first scale P1 = 6 mm and the pitch of the second scale P2 = 7 mm. In this case, the combined pitch R is equal to 42 mm.

[0037] In this example, the combined pitch R is an integer multiple of the first pitch R1, ie 7 times. Likewise, the combination pitch R is an integer multiple of the second pitch R2, ie, 6 times. Therefore, at the ends of the range R, when hour, and Also equal to 2π (modulo 2π). But that may not always be the case.

example 2

[0039] Assume that the pitch of the first scale P1=5mm and the pitch of the second scale P2=7mm (see Figure 4 ). In this case, the combined pitch R is equal to 17.5 mm. But when X=R, hour, with Equal to π (modulus 2π). Therefore, the controller 6 can combine the first phase and / or second phase value to consider the phase difference Instead, positions even beyond said pitch R are unambiguously determined. This means that the measuring device 15 has a measuring range MR which is larger than the combined pitch R; in this example, MR=2R is taken.

[0040] In the example, the pitch is an integer. But it's not critical.

example 3

[0042] Assume that the pitch of the first scale P1 = 4.99 mm and the pitch of the second scale P2 = 4.93 mm. In this case, the combined pitch R is (approximately) equal to 41 cm.

[0043] In this example, when X=R, hour, with Equal to π / 6 (modulo 2π). Therefore, for X>R, and The combination of is still unique, and in this example the measuring range MR is six times the combined pitch R: MR equals approximately 246 cm.

[0044] The invention can be practiced when two (or more) highly accurate scales are used, the respective pitches of which are accurately arranged on the scale. These scales will be expensive. The present invention has surprisingly found that high accuracy is not required. In practice, two different scales can be used, which are intentionally made equal but, due to tolerances, actually have slightly different pitches. The actual pitch difference will be random, however, the actual value of the pitch difference is not critical to the practice of the...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

No PUM Login to View More

Abstract

A positioning device (11) comprises a stationary frame (2), and at least two scales (20, 30) for measuring the location of the platform with respect to the frame, the scales having mutually different pitches (Pl; P2), and respective scanners (23, 33) providing respective scanner output signals (SM l, SM2)- A controller (6) receiving both scanner output signals is capable to uniquely calculate the position (X) of the platform with respect to the frame in a measuring range (MR) that is larger than the largest of said two pitches (Pl; P2).

Description

technical field [0001] The invention generally relates to the field of positioning devices and position measuring devices, but the invention can also be applied in other fields. For purposes of illustration, the invention will be described in the context of a positioning device. Background technique [0002] figure 1 is a block diagram schematically illustrating some of the basic components of a positioning device 1, which generally includes a fixedly mounted frame 2, a displaceable platform 3 or similar displaceable relative to the frame, for positioning the platform relative to the frame An actuator 4 for displacement, a measuring device 5 for measuring the position of the platform relative to the frame, and a controller 6 for controlling the actuator based on the measurement signal received from the measuring device. exist figure 1 In , the displacement is exemplified as a linear displacement (translation) in the horizontal direction 7; alternatively, a rotational disp...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): G01D5/245G01D5/244
CPCG01D5/2452G01D5/24409Y10T29/49863G01D5/245G01D5/244
Inventor G·Z·安格利斯P·霍克斯特拉G·A·J·德福克特
Owner KONINK PHILIPS ELECTRONICS NV
Features
  • R&D
  • Intellectual Property
  • Life Sciences
  • Materials
  • Tech Scout
Why Patsnap Eureka
  • Unparalleled Data Quality
  • Higher Quality Content
  • 60% Fewer Hallucinations
Social media
Patsnap Eureka Blog
Learn More

Browse by: Latest US Patents, China's latest patents, Technical Efficacy Thesaurus, Application Domain, Technology Topic, Popular Technical Reports.

© 2025 PatSnap. All rights reserved.Legal|Privacy policy|Modern Slavery Act Transparency Statement|Sitemap|About US| Contact US: help@patsnap.com