CN208333500U - Absolute value encoder - Google Patents

Abstract

The utility model relates to a kind of absolute value encoder, this absolute value encoder includes: coding disk, and the coding disk is provided with several independent and is evenly distributed on the area code channel Shang Ma；The code area includes identification code, and is located at the front end or rear end in code area.Absolute value encoder provided by the utility model and its corresponding coding and decoding methods, its coding mode is simple, it is easily achieved, reduce the manufacture difficulty of code-disc, decoding is as unit of code area, decoding speed is substantially increased, the use for adjusting code and check code improves error correcting capability, so that entire decoding process is fast and accurate.

Description

Absolute value encoder

Technical field

The utility model relates to a kind of absolute value encoders.

Background technique

Rotary encoder is mechanical location angle important in industry, length, velocity feedback and the sensor for participating in control. According to angle testing principle, optical profile type, magnetic-type, induction type and condenser type can be divided into, shape is exported according to its scale method and signal Formula can divide incremental value encoder, absolute value encoder, absolute value encoder.

Incremental encoder is a kind of variation of opposite location information, the increase for the signal for changing to another point from a bit With the calculating of reduction, also referred to as " relative type motor ", it needs the continual counting of follow-up equipment, since each data are not It is independent, and the reading of front is depended on, earlier data can not be judged by having a power failure with generated error is interfered, to make At deviation accumulation.To sum up being exactly: 1, outage problem；2, signal anti-interference problem；3, the resource utilization issue of follow-up equipment, Especially high resolution encoder, follow-up equipment want all-the-way tracking to sample.

Disadvantages mentioned above based on increment type, people's utility model " absolute type operating mode ", it refers to equipment initial After change, a zero point is determined, later all location informations are the absolute positions with this " zero point ", it is without follow-up equipment Continual counting, but present position values are directly read, for having a power failure and the issuable error of interference institute, due to reading every time Number is all not influenced by front independently, so that deviation accumulation will not be caused, this " absolute type " for being known as receiving device works Mode.

In fact by " the absolute type operating mode " of receiving device and obscuring for " absolute type " of absolute value encoder, it with " absolute coding " of absolute value encoder is not a concept completely, and there are counting errors and add up error, counting device to supply for it Counting when electric fault, high speed cannot respond to equally likely possibility.

And absolute value encoder refer to all positional values of decoder internal after coding generates, all positions in range It sets and " absolute " determines in encoder, each position is independent simultaneously to have uniqueness, inside and out it each time Reading data, all independent of previous reading data, either outside decoder internal or encoder, all there is no " meters The accumulation calculating of number " and previous reading.So the really definition of absolute encoder, refers to all in coding site and range The absolute correspondence of position, the counting independent of inside and out add up and independent, unique absolute coding.

In summary in the case where the application with high speed, safety requires, it is preferred to use truly Absolute value encoder, all position is independent, unique, absolutely, with ensure data it is absolute reliably with high speed accuracy.In this feelings Under condition, the utility model is proposed that a kind of decoding speed is fast, the absolute encoder and coding/decoding method of strong antijamming capability.

Utility model content

The purpose of the utility model is to provide a kind of absolute value encoders.

In order to solve the above-mentioned technical problem, the utility model provides a kind of absolute value encoder, comprising: coding disk, institute Coding disk is stated to be provided with several independent and be evenly distributed on the area code channel Shang Ma；The code area includes identification code, and is located at code The front end or rear end in area.

Further, the identification code includes solid size or sequence of barcodes combination.

Further, each code section length is identical, is suitable for mutual assistance and knows code；And each code area is independently unique, is suitable for straight Connect fixation and recognition current location.

Further, the code area further includes the numeric data code on rear side of identification code, several check bit, and adjustment position.

Further, the numeric data code is independently unique, and is suitable for directly positioning current location；And the numeric data code is by fixing The continuous code of length forms, or numeric data code is divided into two groups by check code；Wherein the check code is suitable for check part or complete Portion's numeric data code.

Further, the adjustment position is suitable for adjusting the light transmission of identification code or the consistency of impermeable light attribute.

Further, the check code is suitable for using complement form.

Another aspect, the utility model additionally provide a kind of working method of absolute value encoder, including coding method and Coding/decoding method.

Further, the coding method includes:

Coding disk sets gradually several yards of areas according to certain rule and sets the initial position in first yard of area；Wherein

The code area includes identification code and numeric data code, and the identification code is located at the front end or rear end of numeric data code；

It is split among the numeric data code by least one check code or adjustment code to obtain multi-group data code, and really Determine the corresponding code conversion system of binary system in each group of data code, and successively continuous cycles are compiled with realizing on coding disk Code.

Further, the coding/decoding method includes:

Identification code all in picture signal is positioned, is corresponding by the Binary Conversion in the multi-group data code in one yard of area Decimal number, and system is converted by corresponding encoded, corresponding decimal number is converted into yard area's number；

The about angle in this yard of area is obtained according to code area number and code-disc resolution ratio；

Then further according to the image center location of shooting and true in conjunction with the position of code section length and identification code and check code The accurate angle in the area Ding Ma.

The utility model has the beneficial effects that absolute value encoder provided by the utility model and its reconciliation of corresponding coding Code method, coding mode are simple, it is easy to accomplish, the manufacture difficulty of code-disc is reduced, decodes as unit of code area, greatly improves Decoding speed, the use for adjusting code and check code improve error correcting capability, so that entire decoding process is fast and accurate.

Detailed description of the invention

The present invention will be further described with reference to the accompanying drawings and examples.

Fig. 1 is the operation principle schematic diagram of the absolute encoder of the utility model；

Fig. 2 (a) is schematic diagram one of the coding method of the absolute value encoder of the utility model as unit of code area；

Fig. 2 (b) is schematic diagram two of the coding method of the absolute value encoder of the utility model as unit of code area；

Fig. 3 is schematic diagram three of the coding method of the absolute value encoder of the utility model as unit of code area.

In figure, light source 1, code-disc 2, CCD3, lens 41,42.

Specific embodiment

The utility model is described in further detail presently in connection with attached drawing.These attached drawings are simplified schematic diagram, Only illustrate the basic structure of the utility model in a schematic way, therefore it only shows composition related with the utility model.

Embodiment 1

As shown in Figure 1, it is simpler to present embodiments provide a kind of operation, calculation amount is smaller and measuring speed is very fast, hardware Cost is relatively low, the absolute value encoder of strong antijamming capability comprising: coding disk according to certain rule set gradually light transmission code and There are many width for opaque code, light transmission code and opaque code；Wherein, with the solid size of a fixed width (or combination of sequence of barcodes) It is one yard of area between two identification codes, each code section length is equal, and the bar code combination in the area Qie Gema is only as identification code One.

The identification code can be located at the front end or rear end of numeric data code, in embodiments herein, by taking front end as an example.

In the present embodiment, as unit of code area, each yard of area is independently unique, and length is identical, and width data position (can be with Referred to as width) 20 can be limited to.

In the present embodiment, the code area includes identification code, numeric data code, several check bit, several adjustment positions, and mutual information It is more, increase error correcting capability.

In the present embodiment, identification code can be the solid size of unique specific width or the combination of several special code sequences, mention The uniqueness of high identification code reduces identification difficulty.

In the present embodiment, check bit is used to check part or total data code, improves error correcting capability.

In the present embodiment, adjustment position is used to adjust the light transmission of identification code or the consistency of impermeable light attribute.

In the present embodiment, adjacent code area can know code with mutual assistance, improve error correcting capability；And can also across code area known Code improves and knows code speed, improves efficiency.

In the present embodiment, check bit uses complement form, controls the width of numeric data code, reduces the difficulty of reading code.

Embodiment 2

On that basis of example 1, the present embodiment 2 additionally provides a kind of working method of absolute value encoder, including coding Method and coding/decoding method.

The coding method includes: that coding disk sets gradually the first yard of area in several yards of areas and setting according to certain rule Beginning position；Wherein the code area includes identification code and numeric data code, and the identification code is located at the front end or rear end of numeric data code；The number It is split according among code by least one check code or adjustment code to obtain multi-group data code, and determined in each group of data code The corresponding code conversion system of binary system, and on coding disk successively to continuous cycles with realize coding.

In the present embodiment, for two groups, i.e., two groups are divided by check code among the numeric data code, and determination the The corresponding code conversion system of binary system in one group of numeric data code, in second group of numeric data code the corresponding code conversion of binary system into System, and successively to continuous cycles to realize coding on coding disk.

Specifically, see Fig. 2 (a) and Fig. 2 (b), a kind of coding method of absolute value encoder provided in this embodiment includes: Coding disk sets gradually light transmission code and opaque code according to certain rule, and there are many width for light transmission code and opaque code；Wherein, with The solid size (or combination of sequence of barcodes) of one fixed width is used as identification code, is one yard of area, each code head of district between two identification codes Spend equal, the bar code combination in the area Qie Gema is unique.

Light transmission code and opaque code the width ratio after check code and adjustment code adjustment are tetra- kinds of 1:2:3:6, wherein identifying Code is closed with the bright filaments of sun code character of 1+6, and in order to control the width of numeric data code, numeric data code is divided into two groups, and centre adds check code, The width data position of two groups of numeric data codes is 1+4,4, and in order to control the width of data bit, selection can represent the binary system pair of data The code conversion hexadecimal ranges answered are respectively 2-14 and 1-14, and the bright filaments of sun code overall width in each yard of area is 20, in 360 degree of coding On disk, there can be 13 × 14=182 totally 182 periods in aforementioned manners, 180 continuous cycles successively be chosen here, if you need to more Refinement, then the digit for only needing to increase numeric data code combination can (the namely corresponding code conversion system model of increase binary system It encloses).

This coding/decoding method includes: to orient mark all in picture signal based on the picture signal measured by CCD Code, according to the center of picture signal, orients the code area being currently located, without Signal Matching is carried out, according to when former code area Numeric data code combination can directly calculate physical location.Current exact position can be determined according to identification code center.

Specifically, the coding/decoding method includes: to position identification code all in picture signal, by the multiple groups number in one yard of area It is corresponding decimal number according to the Binary Conversion in code, and system is converted by corresponding encoded, corresponding decimal number is converted into code Area's number；The about angle in this yard of area is obtained according to code area number and code-disc resolution ratio；Then further according in the image of CCD shooting Heart position and the position of combination code section length and identification code and check code determine the accurate angle in code area.

By taking Fig. 3 as an example, a kind of coding/decoding method of absolute value encoder of the present embodiment includes: the first area Ge Ma in terms of Fig. 3 It is respectively 5,10 that the binary data bit in (left side code area), which is converted into the decimal system,；The binary number in the second area Ge Ma (right side code area) It is continuation code area that according to position, to be converted into the decimal system, which be respectively between 10, the area 4(Qie Liangma, omits and is not drawn into herein), then pass through phase It answers code conversion system that corresponding decimal number is converted to yard area to number, defines calculation formula (A-X) × N+B=F here, It is numbered as all initial positions Ma Qu then yard area can be calculated by formula in the code area for being 2,1 using numeric data code decimal value； Wherein A indicates that the corresponding decimal number of first group of numeric data code, B indicate the corresponding decimal number of second group of numeric data code, X in this formula Indicating the corresponding decimal system initial value of A numeric data code, B presentation code converts the value of system, by taking Fig. 3 as an example, then the first area Ge Ma (5-2) × 14+10=52, the second area Ge Ma (10-2) × 14+4=116.Because choosing 180 periods, so each week Phase represents 2 degree (resolution ratio), 104,232 degree of the about position position in the available present area Liang Gema.Then further according to shooting Image center location and combine the position of code section length 20 and identification code and check bit, present phase can be released respectively To exact position, the opposite Precise Position Synthesis calculated is then gone out final result.

In the coding and decoding methods of the absolute value encoder of the utility model, coding mode is simple, is illustrated and is easily achieved, The manufacture difficulty of code-disc is reduced, with the combination of the solid size of unique specific width or several special code sequences, Ke Yi great when decoding The big accuracy for improving identification code identification, and the bar code inside code area it is only fixed several and and identification code there is certain ratio Example relationship, can increase the efficiency of identification bar code in identification process accordingly, reduce the probability that wrong bar code occurs.Finally due to each The combination of bright filaments of sun code is unique in code area, so only need to correctly identify by bar code arrangement mode inside target area It is directly positioned in the position of code-disc, without bar code matching is carried out, greatly reduces calculation amount when searching aiming spot, drop Low chip CPU usage, improves measuring speed.And check bit sum has been used to adjust position, greatly increase the error correction of bar code Ability.

It is enlightenment, through the above description, related work people with the above-mentioned desirable embodiment according to the utility model Member can carry out various changes and amendments in the range of without departing from this item utility model technical idea completely.This item is real It is not limited to the contents of the specification with novel technical scope, it is necessary to its technology is determined according to scope of the claims Property range.

Claims (7)

1. a kind of absolute value encoder characterized by comprising

Coding disk, the coding disk are provided with several independent and are evenly distributed on the area code channel Shang Ma；

The code area includes identification code, and is located at the front end or rear end in code area.

2. absolute value encoder according to claim 1, which is characterized in that

The identification code includes solid size or sequence of barcodes combination.

3. absolute value encoder according to claim 1, which is characterized in that

Each code section length is identical, is suitable for mutual assistance and knows code；And

Each code area is independently unique, is suitable for direct fixation and recognition current location.

4. absolute value encoder according to claim 1, it is characterised in that

The code area further includes the numeric data code on rear side of identification code, several check bit, and adjustment position.

5. absolute value encoder according to claim 4, which is characterized in that

The numeric data code is independently unique, and is suitable for directly positioning current location；And

The numeric data code is made of the continuous code of regular length, or

Numeric data code is divided into two groups by check code；Wherein

The check code is suitable for check part or total data code.

6. absolute value encoder according to claim 4, which is characterized in that

The adjustment position is suitable for adjusting the light transmission of identification code or the consistency of impermeable light attribute.

7. absolute value encoder according to claim 5, which is characterized in that

The check code is suitable for using complement form.