CN106382947A - High precision portable two-dimensional displacement encoder - Google Patents

Abstract

The invention discloses a high precision portable two-dimensional displacement encoder. The high precision portable two-dimensional displacement encoder can realize sumillimeter grade precision positioning in a relatively large two-dimensional plane scope without depending on external information. The high precision portable two-dimensional displacement encoder comprises a one-dimensional encoder 1, a one-dimensional encoder 2, a rigid support plate, a fixing bolt, a rear end information processing circuit module, etc. The high precision portable two-dimensional displacement encoder can realize submillimeter precision positioning in the two-dimensional plane without depending on the external information source and has a better positioning stability. The high precision portable two-dimensional displacement encoder is simple in structure, small in power consumption and good in portability. The integration and modularization design provides convenience to combination of multiple kinds of devices, and the usage range is wide.

Description

A kind of high-accuracy portable two-dimension displacement encoder

Technical field：

The invention belongs to precision instrument technical field is and in particular to a kind of high-accuracy portable two-dimension displacement encoder.Can It is applied to that Non-Destructive Testing, Entity measurement etc. are multiple need to record displacement information equipment.

Background technology：

Displacement encoder is to carry out working out being converted to by signal or data can be used for storing the equipment with read signal form. Increment type and absolute type encoder can be divided into according to operation principle.Because of its reliable operation, and it is widely used in equipment and produces, process With fields such as detections, such as patent CN1847797 discloses a kind of capacitive displacement transducer.But the current sensor using It is mostly one-dimensional linear or angular encoder, and the two-dimension displacement encoder using on a small quantity is all fastened with extraneous fixed support, Do not possess portability and the advantage of Universal, modular.This patent can according to the difference of two one-dimensional coding device displacement records and integration Realize Real-time Two-dimensional plane precise positioning.

Content of the invention：

For portability and versatility, the invention provides a kind of high-accuracy portable two-dimension displacement encoder.Including two Individual same model one-dimensional coding device, rigid support, for screw that one-dimensional coding device and rigid support are connected be used for processing position The back end signal process circuit mould of shifting signal.The rotationally symmetrical distribution of one-dimensional coding device；Back end signal processing circuit module is by connecting Line is connected with remainder.

A pair of fixation screwed hole is all had on described one-dimensional coding device, for fixing with rigid support；One-dimensional coding device Added with rubber ring on wheel hub, for increasing friction with plane contact, eliminate wheel contact plane relatively and slide；Connecting line is believed with rear end Number process circuit mould is connected, for providing encoder working power and transcoder displacement signal.

All contact with two dimensional surface and rotate during described symmetrical two one-dimensional coding devices work.Two-dimensional encoded Device is advanced along straight line, and two one-dimensional coding device rotating speeds are identical；Two-dimensional encoded device is advanced along curve, and two one-dimensional coding device rotating speeds produce Raw difference.

Four through holes are carried on described rigid support, for and connecting as one one-dimensional coding device using fixing screws.

Described back end signal processing circuit module is mainly connect by internal circuit, input connecting line and the output of 15 pin VGA females Mouth composition.Connecting line in back end signal processing circuit module is connected with encoder.Working for encoder provides power supply and receives Encoder displacement signal.Two-dimension displacement information through signal processing is spread out of two-dimensional encoded device by 15 pin VGA female output interfaces Module, 15 pin VGA female output interfaces can improve the versatility of module.

The displacement signal of one-dimensional coding device is integrated summation and makes the difference, after process by described back end signal processing circuit module One-dimensional signal integrated treatment is 2D signal；When two-dimensional encoded device relative two dimensional plane produce displacement when, one-dimensional coding device A and One-dimensional coding device B rotates respectively, and records bottom offset.Now two-dimensional encoded device displacement and travel angle are carried out as Lower process, draws two-dimensional encoded device position：

$\left\{\begin{array}{c}{\stackrel{\→}{P}}_{t_0+\mathrm{\Δ}t}={\stackrel{\→}{P}}_{t_0}+\frac{{\stackrel{\→}{n}}_{t_0}}{2}{\∫}_{t_0}^{t_0+\mathrm{\Δ}t}\[{\mathrm{\δ}}_A\left(t\right)+{\mathrm{\δ}}_B\left(t\right)\]dt\\ {\mathrm{\θ}}_{t_0+\mathrm{\Δ}t}={\mathrm{\θ}}_{t_0}+\frac{{\∫}_{t_0}^{t_0+\mathrm{\Δ}t}\[{\mathrm{\δ}}_A\left(t\right)-{\mathrm{\δ}}_B\left(t\right)\]dt}{L_{AB}}\\ {\stackrel{\→}{n}}_{t_0}=({\mathrm{cos\θ}}_{t_0},{\mathrm{sin\θ}}_{t_0})\end{array}\right.$

Wherein, t₀Represent the initial time of the record of displacement encoder；Δ t represents a little time interval；δ_A(t) and δ_BT () represents the displacement that one-dimensional coding device A and B recorded within this time respectively；Represent the position (work at two-dimensional encoded device center It is designated as initial point as initial time), subscript represents the moment；θ represents angle (the work initial time direction of the advance of two-dimensional encoded device It is designated as zero degree direction), subscript represents the moment；Represent the unit vector of two-dimensional encoded device direction of advance, subscript represents the moment；L_AB Represent the distance of one-dimensional coding device A and B.

Often through a little time interval, calculating is once updated iteration, so can be calculated two dimension volume in real time The displacement of code device, and displacement signal carries out process and passes to 15 pin VGA female output interfaces the most at last.

The present invention has advantages below：

1. hi-Fix in two dimensional surface can be carried out in real time.Positioning precision is below millimeter.Do not relying on extraneous letter Realize two-dimension displacement measurement in the case of breath, there is high stability.

2. small volume, portability is strong.Beyond the two-dimensional encoded device of the present invention does not need, boundary's fixed support is reference, greatly subtracts Little encoder volume, saving takes up room.

3. small power consumption, versatility is high.Power consumption of the present invention is less than 0.5 watt, and working stability；Data connection module uses 15 pins VGA female output interface, data structure is simple, highly versatile, can use on many devices.

Brief description：

Fig. 1 is high-accuracy portable two-dimension displacement encoder General Implementing case schematic diagram.

Fig. 2 is one-dimensional coding device structural representation in case study on implementation of the present invention.

Fig. 3 is back end signal processing circuit module schematic diagram in case study on implementation of the present invention.

Wherein：1 is one-dimensional coding device A；2 is one-dimensional coding device B；3 is rigid support；4 is fixing screws；5 is connecting line； 6 is back end signal processing circuit module；7 is 15 pin VGA female output interfaces；8 is rubber ring.

Specific embodiment：

Below in conjunction with the accompanying drawings the present invention is described in further detail：

Referring to Fig. 1,2 and 3, this patent discloses a kind of two-dimensional encoded device of high-accuracy portable, it is being independent of external information In the case of, submillimeter level precision positioning in larger two dimensional surface scope can achieve, and do not rely on external information source, tool There is good position stability.Structure is simplified, small power consumption, and portable performance is superior.Integrated, modularized design, be easy to multiple Equipment combines, and range is extensive.

Examples below describes the specific embodiment of the present invention.

As shown in figure 1, the present invention is by one-dimensional coding device A, one-dimensional coding device B, rigid support, fixing screws, connecting line, after The parts such as end signal processing circuit module form.

Four through holes are carried on described rigid support, for and connecting as one one-dimensional coding device using fixing screws； A pair of fixation screwed hole is all had on one-dimensional coding device, for fixing with rigid support.

Added with rubber ring on described one-dimensional coding device wheel hub, for increasing friction with plane contact, eliminate wheel and relatively contact Planar slide；Connecting line is connected with back end signal process circuit mould, for providing encoder working power and transcoder position Shifting signal.

During described two-dimensional encoded device work, rubber ring with plane contact and gently press by appropriateness, so that encoder wheel is occurred no sliding Dynamic rotation is simultaneously subjected to displacement signal by rotation.

Described back end signal processing circuit module by the displacement signal of two one-dimensional coding devices be integrated sue for peace with poor Deng computing, after process by one-dimensional signal integrated treatment be 2D signal；Displacement signal coded treatment is passed to 15 pin VGA females defeated Outgoing interface.

Above content is to further describe it is impossible to assert with reference to specific preferred implementation is made for the present invention The specific embodiment of the present invention is only limitted to this, for general technical staff of the technical field of the invention, is not taking off On the premise of present inventive concept, some simple deduction or replace can also be made, all should be considered as belonging to the present invention by institute The claims submitted to determine scope of patent protection.

Claims (6)

1. a kind of high-accuracy portable two-dimension displacement encoder it is characterised in that：Including one-dimensional coding device A, one-dimensional coding device B, Rigid support and back end signal processing circuit module；Described one-dimensional coding device A and one-dimensional coding device B is separately fixed at rigid support On, one-dimensional coding device A and one-dimensional coding device B is connected with back end signal processing circuit module by connecting line respectively.

2. high-accuracy portable two-dimension displacement encoder as claimed in claim 1 it is characterised in that：Described one-dimensional coding device A and All include encoder main body on one-dimensional coding device B, this encoder main body is provided with two screwed holes and a runner, on runner It is provided with rubber ring.

3. high-accuracy portable two-dimension displacement encoder as claimed in claim 1 it is characterised in that：Arrange on described rigid support Screwed hole, one-dimensional coding device A and one-dimensional coding device B is had all to be connected on rigid support by fixing screws.

4. high-accuracy portable two-dimension displacement encoder as claimed in claim 1 it is characterised in that：Described one-dimensional coding device A and One-dimensional coding device B becomes rotationally symmetrical distribution with central shaft.

5. high-accuracy portable two-dimension displacement encoder as claimed in claim 1 it is characterised in that：Described back end signal processes electricity Road module is made up of internal circuit, input connecting line and 15 pin VGA female output interfaces；In back end signal processing circuit module Connecting line is connected with encoder, and working for encoder provides power supply and receive encoder displacement signal；15 pin VGA female outputs connect Two-dimension displacement information through signal processing is spread out of two-dimensional encoded device module by mouth.

6. high-accuracy portable two-dimension displacement encoder as claimed in claim 6 it is characterised in that：Described back end signal processes electricity The displacement signal of one-dimensional coding device A and one-dimensional coding device B is integrated summation and makes the difference by road module, after process, one-dimensional signal is comprehensive Conjunction is processed as 2D signal.