CN106556298B - A kind of Gray code band Intelligent measuring tape - Google Patents
A kind of Gray code band Intelligent measuring tape Download PDFInfo
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- CN106556298B CN106556298B CN201510633042.3A CN201510633042A CN106556298B CN 106556298 B CN106556298 B CN 106556298B CN 201510633042 A CN201510633042 A CN 201510633042A CN 106556298 B CN106556298 B CN 106556298B
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- 238000005259 measurement Methods 0.000 claims description 5
- 238000001727 in vivo Methods 0.000 claims description 3
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- Tape Measures (AREA)
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Abstract
The invention discloses a kind of Gray code band Intelligent measuring tapes, setting Gray code is repeated by the specified period by the way that Gray code to be set up directly on tape band, and on tape band, rather than passes through printing Gray's code-disc, and be arranged in Intelligent measuring tape ontology, reduce the volume of Intelligent measuring tape；Meanwhile each Gray code in a cycle has the black code or white code of one fixed width, can read the Gray code on tape band by reading device and enhance the stability of reading instead of traditional scale reading manner.
Description
Technical field
The present invention relates to Intelligent measuring tape technical field more particularly to a kind of Gray code band Intelligent measuring tapes.
Background technique
Gray code belongs to Reliability codes, is a kind of coding mode of error minimization.Because although natural binary code
Analog signal directly can be converted by D/A converter, but be converted to 4 Shi Erjin in certain situations, such as from metric 3
Each of code processed will become, and digital circuit can be made to generate very big peak current pulse.And Gray code is then without this disadvantage,
It is when adjacent interdigit is converted, only one generation variation.It is patrolled when greatly reducing by a state to next state
That collects obscures.Since two adjacent interblocks of this coding only have a difference, thus in the straight-line displacement for direction
In the conversion of amount-digital quantity, when straight-line displacement amount occur minor change (and when may cause digital quantity and changing, Gray code
Only change one, it is more reliable compared with the case where other codings change simultaneously two or multidigit in this way, error can be reduced
Possibility.
The prior art mainly adopts Gray's code-discs for detecting or counting, and reads Gray's code-disc in encoder or brushgear
Often the phenomenon that will appear jump brush or leakage brush, i.e., since brushgear revolving speed is too fast, there is brushgear and bounced some Gray
Code, is unfavorable for the use of Gray code at the phenomenon that leading to miscount.Meanwhile Gray's code-disc being arranged in Intelligent measuring tape ontology
Larger inner space is occupied, so that device volume is larger.
Therefore, the existing technology needs to be improved and developed.
Summary of the invention
In view of above-mentioned deficiencies of the prior art, the purpose of the present invention is to provide a kind of Gray code band Intelligent measuring tapes, it is intended to
When printing common length scale in the tape of tape measure, there are errors for reading in the prior art for solution, or are arranged inside tape measure
Gray's code-disc leads to the biggish defect of device volume.
Technical scheme is as follows:
A kind of Gray code band Intelligent measuring tape, wherein including Intelligent measuring tape ontology, and be arranged in the Intelligent measuring tape ontology
And the tape band that can be extracted out, Gray code is provided on the tape band.
The Gray code band Intelligent measuring tape, wherein be additionally provided in the Intelligent measuring tape ontology for reading tape band
The Gray code reading device of Gray code.
The Gray code band Intelligent measuring tape, wherein the tow sides of the tape band are provided at least one linear type
Gray's code channel, the Gray code of multiple countings is provided on Gray's code channel.
The Gray code band Intelligent measuring tape, wherein the front and back of the tape band is provided with 3 lattice from bottom to up
Thunder code channel.
Gray code band Intelligent measuring tape, wherein low three Gray's code channels are arranged in the front of the tape band, and respectively the
One Gray's code channel, second Gray code channel and third position Gray's code channel.
The Gray code band Intelligent measuring tape, wherein the positive side setting of face tape band in the Intelligent measuring tape ontology
There are 3 Gray code reading devices, respectively the first Gray code reading device, the second Gray code reading device and third Gray code are read
Take device；Wherein, first Gray's code channel described in the first Gray code reading device face, second Gray code read dress
Set second Gray code channel described in face, third position Gray's code channel described in the third Gray code reading device face.
Gray code band Intelligent measuring tape, wherein Gao Sanwei Gray code channel is arranged in the back side of the tape band, and respectively the
Four Gray's code channels, the 5th Gray's code channel and the 6th Gray's code channel.
The Gray code band Intelligent measuring tape, wherein the side setting at the face tape band back side in the Intelligent measuring tape ontology
There are 3 Gray code reading devices, respectively the 4th Gray code reading device, the 5th Gray code reading device and the 6th Gray code are read
Take device；Wherein, the 4th Gray's code channel described in the 4th Gray code reading device face, the 5th Gray code read dress
Set the 5th Gray's code channel described in face, the 6th Gray's code channel described in the 6th Gray code reading device face.
The Gray code band Intelligent measuring tape, wherein the Gray code on the tape band is pressed specified period repetition and is arranged.
The utility model has the advantages that Gray code band Intelligent measuring tape of the present invention, by the way that Gray code is set up directly on tape band,
And setting Gray code is repeated by the specified period on tape band, rather than by printing Gray's code-disc, and be arranged in Intelligent measuring tape sheet
In vivo, the volume of Intelligent measuring tape is reduced；Meanwhile each Gray code in a cycle has the black code or white of one fixed width
Code can read the Gray code on tape band by reading device and enhance the steady of reading instead of traditional scale reading manner
It is qualitative.
Detailed description of the invention
Fig. 1 is structural schematic diagram of the Gray code of the present invention with Intelligent measuring tape preferred embodiment.
Fig. 2 is explosive view of the Gray code of the present invention with Intelligent measuring tape preferred embodiment.
Fig. 3 is the positive schematic diagram of tape band in Gray code band Intelligent measuring tape preferred embodiment of the present invention.
Fig. 4 is schematic diagram of the Gray code of the present invention with the tape band back side in Intelligent measuring tape preferred embodiment.
Specific embodiment
The present invention provides a kind of Gray code band Intelligent measuring tape, to keep the purpose of the present invention, technical solution and effect more clear
Chu defines, and the present invention is described in more detail below.It should be appreciated that specific embodiment described herein is only used to solve
The present invention is released, is not intended to limit the present invention.
Please referring also to Fig. 1-Fig. 2, wherein Fig. 1 is structure of the Gray code of the present invention with Intelligent measuring tape preferred embodiment
Schematic diagram, Fig. 2 are explosive view of the Gray code of the present invention with Intelligent measuring tape preferred embodiment, and the Gray code band is intelligently rolled up
Ruler, including Intelligent measuring tape ontology 100, and the tape band 200 that in the Intelligent measuring tape ontology 100 and can be extracted out is set, it is described
Gray code is provided on tape band 200.Further, it is used for as shown in Fig. 2, being additionally provided in the Intelligent measuring tape ontology 100
Read the Gray code reading device 300 of Gray code on tape band 200.
When it is implemented, be additionally provided on the Intelligent measuring tape ontology 100 real time readouts for showing Intelligent measuring tape and
The display screen of state；It is additionally provided in the Intelligent measuring tape ontology 100 for the data of Intelligent measuring tape to be sent to mobile terminal
Or receive the radio receiving transmitting module that mobile terminal sends data；It is additionally provided in the Intelligent measuring tape ontology 100 for power supply
Power supply.More specifically, the display screen is E-ink display screen, TN display screen, STN display screen or TFT display screen；It is described wireless
Transceiver module is bluetooth module.
Further, as shown in Figure 3 and Figure 4, the tow sides of the tape band 200 are provided at least one linear type
Gray's code channel 210, be provided with multiple counting Gray codes on Gray's code channel 210.When it is implemented, such as Fig. 1 and Fig. 2 institute
Show, tape band outlet 110 is provided on the Intelligent measuring tape ontology 100, is taken out of in the Intelligent measuring tape ontology 100 close to tape measure
It is provided with and the one-to-one Gray code reading device 300 of Gray's code channel 210 at the position of mouth 110.
Since the same face that all Gray's code channels 210 are arranged at tape band 200 will increase the width of tape band 200,
Increase the height of tape band outlet 110, that is, increase the thickness of Intelligent measuring tape ontology 100, to increase entire intelligence
The volume of energy tape measure is not easy to user's carrying.
If the two sides of tape band 200 is arranged in Gray's code channel 210, the width of tape band 200 can be reduced, is conducive to
Reduce the volume of Intelligent measuring tape, is carried convenient for user.
For example, N number of Gray's code channel (its can be arranged in front when being provided with 6 Gray's code channels 210 on tape band 200 altogether
In 1≤N≤6, and N be positive integer), overleaf be arranged (6-N) a Gray's code channel.Since the height of each Gray's code channel 210 is equal
Equal and be fixed value, the sum of height of Gray's code channel 210 of 200 the same face of tape band is equal to the width of tape band 200, therefore works as
The number of the positive Gray's code channel 210 of tape band 200 differs 1 or complete with the number of Gray's code channel 210 at 200 back side of tape band
When complete equal, the width of tape band 200 can be minimized value.
Preferably, as shown in Figure 3 and Figure 4, the front and the back side of the tape band 200 are provided with 3 lattice from bottom to up
Thunder code channel 210；Low three Gray's code channels, respectively first Gray's code channel 211, second is arranged in the front of the tape band 200
Position Gray's code channel 212 and third position Gray's code channel 213；Gao Sanwei Gray code channel is arranged in the back side of the tape band 200, respectively
4th Gray's code channel 214, the 5th Gray's code channel 215 and the 6th Gray's code channel 216.
In the specific implementation, it is successively alternately present as shown in figure 3, being provided with black and white on first Gray's code channel 211
The black code of first Gray's code channel and first Gray code spoken parts in an opera code, the maximum width of the black code of first Gray's code channel is
2mm.As shown in figure 4, it is black to be provided with the 4th Gray's code channel that black and white is successively alternately present on the 4th Gray's code channel 214
Code and the 4th Gray code spoken parts in an opera code, the maximum width of the 4th black code of Gray's code channel are 16mm.When by described first
When the maximum width of the black code of Gray's code channel is set as 2mm, then each length cycles for 64mm(are in the 6th Gray's code channel 216
Only occur primary black code in same period, primary white code also only occur) namely tape band 200 in the weights of 6 Gray codes is set
Multiple period LTFor 64mm.Similarly, when setting 4mm for the maximum width of the black code of first Gray's code channel, 6 Gray codes
Repetition period LTFor 128mm.Due to when being provided with 6 Gray's code channels on tape band 200, and by the repetition of 6 Gray codes
Period LTWhen for 64mm, when being able to satisfy user and extracting the tape band 200 by various speed, Gray code will not be made to read dress
It sets 300 and misses statistics repetition period LTThe number repeated, therefore by the repetition period L of 6 Gray codes when being embodiedTSetting
For 64mm.
For the clearer set-up mode for illustrating 6 Gray codes on tape band 200 in the present invention, below by such as table 1-
6 Gray's code tables and Fig. 3 and Fig. 4 shown in table 4 further illustrate.
| Serial number | 6 Gray codes | High 3 corresponding decimal numbers | Low 3 corresponding decimal numbers | Serial number | 6 Gray codes | High 3 corresponding decimal numbers | Low 3 corresponding decimal numbers |
| 1 | 000000 | 0 | 0 | 9 | 001100 | 1 | 7 |
| 2 | 000001 | 0 | 1 | 10 | 001101 | 1 | 6 |
| 3 | 000011 | 0 | 2 | 11 | 001111 | 1 | 5 |
| 4 | 000010 | 0 | 3 | 12 | 001110 | 1 | 4 |
| 5 | 000110 | 0 | 4 | 13 | 001010 | 1 | 3 |
| 6 | 000111 | 0 | 5 | 14 | 001011 | 1 | 2 |
| 7 | 000101 | 0 | 6 | 15 | 001001 | 1 | 1 |
| 8 | 000100 | 0 | 7 | 16 | 001000 | 1 | 0 |
Table 1
| Serial number | 6 Gray codes | High 3 corresponding decimal numbers | Low 3 corresponding decimal numbers | Serial number | 6 Gray codes | High 3 corresponding decimal numbers | Low 3 corresponding decimal numbers |
| 17 | 011000 | 2 | 0 | 25 | 010100 | 3 | 7 |
| 18 | 011001 | 2 | 1 | 26 | 010101 | 3 | 6 |
| 19 | 011011 | 2 | 2 | 27 | 010111 | 3 | 5 |
| 20 | 011010 | 2 | 3 | 28 | 010110 | 3 | 4 |
| 21 | 011110 | 2 | 4 | 29 | 010010 | 3 | 3 |
| 22 | 011111 | 2 | 5 | 30 | 010011 | 3 | 2 |
| 23 | 011101 | 2 | 6 | 31 | 010001 | 3 | 1 |
| 24 | 011100 | 2 | 7 | 32 | 010000 | 3 | 0 |
Table 2
| Serial number | 6 Gray codes | High 3 corresponding decimal numbers | Low 3 corresponding decimal numbers | Serial number | 6 Gray codes | High 3 corresponding decimal numbers | Low 3 corresponding decimal numbers |
| 33 | 110000 | 4 | 0 | 41 | 111100 | 5 | 7 |
| 34 | 110001 | 4 | 1 | 42 | 111101 | 5 | 6 |
| 35 | 110011 | 4 | 2 | 43 | 111111 | 5 | 5 |
| 36 | 110010 | 4 | 3 | 44 | 111110 | 5 | 4 |
| 37 | 110110 | 4 | 4 | 45 | 111010 | 5 | 3 |
| 38 | 110111 | 4 | 5 | 46 | 111011 | 5 | 2 |
| 39 | 110101 | 4 | 6 | 47 | 111001 | 5 | 1 |
| 40 | 110100 | 4 | 7 | 48 | 111000 | 5 | 0 |
Table 3
| Serial number | 6 Gray codes | High 3 corresponding decimal numbers | Low 3 corresponding decimal numbers | Serial number | 6 Gray codes | High 3 corresponding decimal numbers | Low 3 corresponding decimal numbers |
| 49 | 101000 | 6 | 0 | 57 | 100100 | 7 | 7 |
| 50 | 101001 | 6 | 1 | 58 | 100101 | 7 | 6 |
| 51 | 101011 | 6 | 2 | 59 | 100111 | 7 | 5 |
| 52 | 101010 | 6 | 3 | 60 | 100110 | 7 | 4 |
| 53 | 101110 | 6 | 4 | 61 | 100010 | 7 | 3 |
| 54 | 101111 | 6 | 5 | 62 | 100011 | 7 | 2 |
| 55 | 101101 | 6 | 6 | 63 | 100001 | 7 | 1 |
| 56 | 101100 | 6 | 7 | 64 | 100000 | 7 | 0 |
Table 4
As it can be seen that it is found that the repetition period of 6 Gray codes is 64 from 6 Gray's code tables of table 1- table 4, and serial number (M+
1) Gray code (wherein 1≤M≤63) compared with the Gray code of serial number M, has and only variation has occurred (by 1 in one-bit digital
Become 0, or is become 1) from 0.If black code is denoted as 0, white code is denoted as 1, then by above-mentioned 64 6 Gray codes with the one of tape band 200
End is starting point, is sequentially printed to the other end.Such as end, tool is arranged where starting point in this 6 Gray codes by the 000000 of serial number 1
Body highest order in 6 Gray codes (i.e. the 6th) 0 is arranged in the 6th Gray's code channel 216, by secondary high-order (i.e. the 5th) 0
Third position 0 is arranged in third by the 4th 0 setting in the 4th Gray's code channel 214 in the 5th Gray's code channel 215 for setting
Position Gray's code channel 213, secondary low level (i.e. second) 0 is arranged in second Gray code channel 212, by lowest order (i.e. first) 0
It is arranged in first Gray's code channel, the height of above-mentioned 6 codes is equal with the height of corresponding Gray's code channel, and above-mentioned 6 codes are
Rectangular strip, and the width of rectangular strip is 1mm, and Gray is set in sequence on tape band 200 by serial number shown in table 1- table 4 in this way
Code, can be obtained tape band 200 as shown in Figure 3 and Figure 4.Wherein, 200 front of tape band as shown in Figure 3 is from top to bottom
Set gradually first Gray's code channel 211, second Gray code channel 212 and third position Gray's code channel 213, volume as shown in Figure 4
200 back side of tape sets gradually the 6th Gray's code channel 216, the 5th Gray's code channel 215 and the 4th Gray code from top to bottom
Road 214.
When the front of the tape band 200 of the Intelligent measuring tape and the back side are provided with 3 Gray's code channels 210 from bottom to up
When, it is additionally provided with and the one-to-one Gray code reading device 300 of Gray's code channel 210, and each Gray code reading device
Altitude range of the range of exposures of the infrared light of sending without departing from each Gray's code channel 210.Specifically, the first Gray code reads dress
Set first Gray's code channel 211 described in face, second Gray's code channel described in the second Gray code reading device face, third Gray
Third position Gray's code channel 213 described in code reading device face, the 4th Gray's code channel described in the 4th Gray code reading device face
214, the 5th Gray's code channel 215 described in the 5th Gray code reading device face, described in the 6th Gray code reading device face
Six Gray's code channels 216.Above-mentioned six Gray code reading devices are separately connected the control chip of the MCU in Intelligent measuring tape ontology 100
In I/O mouthfuls of correspondence.
Since the two sides of tape band 200 are respectively arranged 3 Gray code reading devices 300, if the Gray of 200 two sides of tape band
The code complete face of reading device, the then excessively described volume of infrared transmitting that the Gray code reading device 300 of 200 side of tape band issues
When tape 200, the infrared light reception result that will lead to the Gray code reading device 300 of the other side changes, and influences measurement result.
In order to ensure the accuracy of measurement result, need to by the starting point of the positive Gray's code channel of the tape band 200 with it is described
The starting point of Gray's code channel at 200 back side of tape band shifts to install.Due to when tape band 200 be the first beginning and end be drawn out state when,
The starting point of first Gray's code channel 211 described in the first Gray code reading device face, the second Gray code reading device face
The starting point of the second Gray code channel 212, third position Gray's code channel 213 described in third Gray code reading device face rise
Point, the starting point of the 4th Gray's code channel 214 described in the 4th Gray code reading device face, the 5th Gray code reading device face institute
State the starting point of the 5th Gray's code channel 215, the starting point of the 6th Gray's code channel 216 described in the 6th Gray code reading device face.
Since the starting point of the two-sided Gray's code channel of tape band 200 has dislocation, therefore it is distributed in the first Gray of 200 side of tape band
Code reading device, the second Gray code reading device and third Gray code reading device face position relative to being distributed in the volume
The 4th Gray code reading device, the 5th Gray code reading device and the 6th Gray code reading device face of 200 other side of tape
Position have the dislocation of certain distance.When it is implemented, the starting point of the positive Gray's code channel of the tape band 200 and the tape measure
The starting point dislocation distance of Gray's code channel with 200 back sides is 3-10mm.It is optimal, the positive Gray's code channel of the tape band 200
Starting point and 200 back side of tape band Gray's code channel starting point dislocation distance be 5.5mm.
Due to being all to occur black code and white code with some cycles, and white code and black code are to hand on each Gray's code channel 210
For appearance.The absorptivity difference for the infrared light that black code and white code issue Gray code reading device 300 simultaneously, specifically black code are right
The absorptivity of infrared light is high, and white code is low to the absorptivity of infrared light and is lower than the infrared absorption rate of black code, reflects by black code
The infrared light to go back is decoded as 0 after being received by Gray code reading device 300, and the infrared light reflected back by white code is by Gray
Code reading device 300 is decoded as 1 after receiving.
Therefore when tape band 200 is during being pulled, by Gray code reading device 300 and with setting in Intelligent measuring tape
The MCU control chip connecting in ontology 100 and with Gray code reading device 300 detects tape band 200 jointly and repeats when pulled
The frequency n of cycle length and the offset Δ L in current repetition period length, then pass through L=n*LT+ Δ L can be calculated
Actual measurement length L, is achieved and accurately measures to length, reduce measurement error.Dress is read by then passing through Gray code
On 300 reading tape bands 200 Gray code is set, rather than user directly reads, and reads data result and stablizes, error occurrence probability
It is smaller.
In conclusion Gray code band Intelligent measuring tape of the present invention, by the way that Gray code is set up directly on tape band,
And setting Gray code is repeated by the specified period on tape band, rather than by printing Gray's code-disc, and be arranged in Intelligent measuring tape sheet
In vivo, the volume of Intelligent measuring tape is reduced；Meanwhile each Gray code in a cycle has the black code or white of one fixed width
Code can read the Gray code on tape band by reading device and enhance the steady of reading instead of traditional scale reading manner
It is qualitative.
It should be understood that the application of the present invention is not limited to the above for those of ordinary skills can
With improvement or transformation based on the above description, all these modifications and variations all should belong to the guarantor of appended claims of the present invention
Protect range.
Claims (6)
1. a kind of Gray code band Intelligent measuring tape, which is characterized in that including Intelligent measuring tape ontology, and be arranged in the Intelligent measuring tape sheet
In vivo and the tape band that can extract out, Gray code is provided on the tape band；It is additionally provided with and is used in the Intelligent measuring tape ontology
Read the Gray code reading device of Gray code on tape band；Gray code on the tape band is pressed specified period repetition and is arranged；Intelligence
It can be provided with the MCU control chip connecting with Gray code reading device in tape measure ontology, and pass through the Gray code reading device
The tape band number of repetition period length and in current repetition period length when pulled is detected jointly with MCU control chip
Actual measurement length is calculated in offset；The tow sides of the tape band are provided at least one linear Gray code
Road is provided with the Gray code of multiple countings on Gray's code channel；The back side of the tape band is provided with black code maximum width
Widest Gray's code channel, and will only occur the length cycles of primary black code and primary white code in Gray's code channel in same period
It is set as the repetition period of all Gray codes.
2. according to claim 1 Gray code band Intelligent measuring tape, which is characterized in that the front and back of the tape band from
Under supreme be provided with 3 Gray's code channels.
3. Gray code band Intelligent measuring tape according to claim 2, which is characterized in that the front setting of the tape band is three low
Gray's code channel, respectively first Gray's code channel, second Gray code channel and third position Gray's code channel.
4. Gray code band Intelligent measuring tape according to claim 3, which is characterized in that face tape measure in the Intelligent measuring tape ontology
Positive side is provided with 3 Gray code reading devices, respectively the first Gray code reading device, the second Gray code read dress
It sets and third Gray code reading device；Wherein, first Gray's code channel described in the first Gray code reading device face, it is described
Second Gray's code channel described in second Gray code reading device face, third position described in the third Gray code reading device face
Gray's code channel.
5. Gray code band Intelligent measuring tape according to claim 3, which is characterized in that Gao Sanwei is arranged in the back side of the tape band
Gray's code channel, respectively the 4th Gray's code channel, the 5th Gray's code channel and the 6th Gray's code channel.
6. Gray code band Intelligent measuring tape according to claim 5, which is characterized in that face tape measure in the Intelligent measuring tape ontology
Side with the back side is provided with 3 Gray code reading devices, and respectively the 4th Gray code reading device, the 5th Gray code read dress
It sets and the 6th Gray code reading device；Wherein, the 4th Gray's code channel described in the 4th Gray code reading device face, it is described
5th Gray's code channel described in 5th Gray code reading device face, the 6th described in the 6th Gray code reading device face
Gray's code channel.
Priority Applications (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510633042.3A CN106556298B (en) | 2015-09-30 | 2015-09-30 | A kind of Gray code band Intelligent measuring tape |
| PCT/CN2016/100522 WO2017054717A1 (en) | 2015-09-30 | 2016-09-28 | Gray code tape, intelligent tape measure having gray code tape and data reading method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201510633042.3A CN106556298B (en) | 2015-09-30 | 2015-09-30 | A kind of Gray code band Intelligent measuring tape |
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| CN106556298A CN106556298A (en) | 2017-04-05 |
| CN106556298B true CN106556298B (en) | 2019-10-29 |
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Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4242574A (en) * | 1978-02-02 | 1980-12-30 | Grant Walter W | Digital display tape measure with photoelectric sensing of tape displacement |
| FR2614982B1 (en) * | 1987-05-04 | 1989-09-15 | Mercier Marie France | DIRECT READING DIGITAL METER, WORKING IN ABSOLUTE WITH MEMORY AND INFORMATION RETURN |
| CN101273244A (en) * | 2005-07-25 | 2008-09-24 | 霍克斯特马斯巴尔泽有限责任公司 | Electronic measuring tape and a length measuring device provided therewith |
| CN104764391A (en) * | 2015-03-13 | 2015-07-08 | 东莞捷荣技术股份有限公司 | Electric steel tape |
| CN205027230U (en) * | 2015-09-30 | 2016-02-10 | 捷荣科技集团有限公司 | Gray code area intelligence tape measure |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5288720B2 (en) * | 2007-04-06 | 2013-09-11 | 中国電力株式会社 | Tree diameter measuring instrument |
-
2015
- 2015-09-30 CN CN201510633042.3A patent/CN106556298B/en not_active Expired - Fee Related
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4242574A (en) * | 1978-02-02 | 1980-12-30 | Grant Walter W | Digital display tape measure with photoelectric sensing of tape displacement |
| FR2614982B1 (en) * | 1987-05-04 | 1989-09-15 | Mercier Marie France | DIRECT READING DIGITAL METER, WORKING IN ABSOLUTE WITH MEMORY AND INFORMATION RETURN |
| CN101273244A (en) * | 2005-07-25 | 2008-09-24 | 霍克斯特马斯巴尔泽有限责任公司 | Electronic measuring tape and a length measuring device provided therewith |
| CN104764391A (en) * | 2015-03-13 | 2015-07-08 | 东莞捷荣技术股份有限公司 | Electric steel tape |
| CN205027230U (en) * | 2015-09-30 | 2016-02-10 | 捷荣科技集团有限公司 | Gray code area intelligence tape measure |
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| CN106556298A (en) | 2017-04-05 |
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