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Tele-metering direct-reading encoder of meter counter

A counter and direct reading technology, applied in the field of counter remote transmission and direct reading encoder, can solve the problems of high process requirements, failure, unstable character wheel code reading, etc., to reduce assembly process requirements, stable and accurate reading judgment, Stable and accurate readings

Active Publication Date: 2008-12-10
SHENZHEN JASON DIGITAL TECH CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] 1. The design of the character wheel code disc is unreasonable
Owing to ignoring the carry linkage of each character wheel consisting of 2 driving teeth and 20 driven teeth, that is to say, the character wheel should step by 360°÷(20×2)=9° every time, so , the central angle corresponding to the light-transmitting hole slots of the coding character wheel and the intervals between each hole slot should also be a common multiple of 9°, otherwise when the character wheel rotation is in the critical state of carry, due to the change of digits in two adjacent groups of binary codes More than 1 digit will lead to unstable reading of the character wheel and fail, thus affecting the promotion and application of remote direct reading meters, especially direct reading water meters and direct reading gas meters
[0004] 2. The setting of photoelectric sampling points is unreasonable
Regardless of the transmission or reflective photoelectric sampling mode, under the premise of limited (generally 5, 6 or 7) sampling points, it is impossible to obtain as much complete angular position information of the character wheel as possible, especially when the character The angular position information when the wheel rotation is in the critical state of carry; there is no breakthrough new idea for the arrangement of photocells, which makes it difficult to disassemble and install the photocells and their circuit boards in the narrow and small counter transparent character wheel box structure. The production process requires too much technology, and the product consistency test is difficult to achieve, so it is impossible to put it into production on a large scale

Method used

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  • Tele-metering direct-reading encoder of meter counter
  • Tele-metering direct-reading encoder of meter counter
  • Tele-metering direct-reading encoder of meter counter

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] Example 1: from figure 1 It can be clearly seen that the remote transmission direct-reading encoder of the meter counter is composed of a transparent character wheel box 1, a number of opaque coded character wheels 7, a character wheel shaft 12, a carry coupling wheel 10, a carry coupling wheel shaft 11, a transmission line circuit board 8, a receiving The pipeline circuit board 9 is composed of several encoding character wheels 7 arranged at intervals through the character wheel shafts 12 and installed in the transparent character wheel box 1. Axle 11 is installed in the transparent word wheel box 1 outside code word wheel 7 circumferences.

[0030] 20 carry driven teeth 2 are evenly distributed on one side of the said coding word wheel 7, and 2 carry active teeth 6 are arranged on the appropriate position on the other side of the ring surface (see figure 2 ); the wheel spoke equal radius R concentric circle of coding character wheel 7 is all provided with the first ...

Embodiment 2

[0034] Embodiment 2: The example structure of the meter counter remote transmission direct-reading encoder is basically the same as that of Embodiment 1, the only difference is that the first light-transmitting hole groove 3 on the encoding character wheel 7 corresponds to the central angle α 1 27°±2°, the second light-transmitting hole slot 4 corresponds to the central angle α 2 is 90°±2°, the third light-transmitting hole slot 5 corresponds to the central angle α 3 63°±2°; the central angle β between the first light-transmitting hole groove 3 and the second light-transmitting hole groove 4 1 63°±2°, the central angle β between the second light-transmitting hole groove 4 and the third light-transmitting hole groove 5 2 is 27°±2°.

[0035] Its working process is identical with embodiment 1.

Embodiment 3

[0036] Embodiment 3: The example structure of the remote transmission direct-reading encoder of the meter counter is basically the same as that of Embodiment 1, the only difference is that the first light-transmitting hole groove 3 on the encoding character wheel 7 corresponds to the central angle α 1 is 45°±3°, the second light-transmitting hole slot 4 corresponds to the central angle α 2 90°±3°, the third light-transmitting hole slot 5 corresponds to the central angle α 3 45°±3°; the central angle β between the first light-transmitting hole groove 3 and the second light-transmitting hole groove 4 1 45°±3°, the central angle β between the second light-transmitting hole groove 4 and the third light-transmitting hole groove 5 2 is 45°±3°.

[0037] Its working process is identical with embodiment 1.

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Abstract

A remote-transmission direct-reading coder of a counter of a gauge includes a transparent character wheel box, a plurality of coding character wheels and a plurality of carry coupling wheels corresponding to the coding character wheels; the concentric circumference of an equal radius R of the spoke of each coding character wheel is provided with three sections of light transmission hole slots; ten numbers from 0 to 9 are uniformly arranged on the annular cylindrical surface of the coding character wheel in sequence. The invention is characterized in that the corresponding central angles of the three sections of light transmission hole slots on the coding character wheel are respectively as follows: Alpha 1 is 63 degrees plus / minus 3 degrees; Alpha 2 is 90 degrees plus / minus 3 degrees and Alpha 3 is 27 degrees plus / minus 3 degrees; the distances of the three sections of light transmission hole slots are respectively as follows: Beta 1 is 27 degrees plus / minus 3 degrees; Beta 2 is 63 degrees plus / minus 3 degrees in turn. The two sides of the coding character wheel and the arcs with concentric equal radius R of the three sections of light transmission hole slots are provided with five photoelectric sampling points. The remote-transmission direct-reading coder of the counter of a gauge has the beneficial effects of improving the coding precision of the coding character wheel, stably and accurately reading, stably and accurately reading when carry from a lower bit of ''9'' to a high bit of ''0'' is carried out on the character wheel.

Description

technical field [0001] The invention relates to the field of meter data remote transmission systems, in particular to a counter remote transmission direct-reading encoder suitable for traditional mechanical meters such as wet and dry water meters or gas meters. Background technique [0002] At present, there are many types of direct-reading meters that use photoelectric coding technology to collect character wheel information. In summary, there are still defects in two aspects: [0003] 1. The design of the character wheel code disc is unreasonable. Owing to ignoring the carry linkage of each character wheel consisting of 2 driving teeth and 20 driven teeth, that is to say, the character wheel should step by 360°÷(20×2)=9° every time, so , the central angle corresponding to the light-transmitting hole slots of the coding character wheel and the intervals between each hole slot should also be a common multiple of 9°, otherwise when the character wheel rotation is in the crit...

Claims

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Application Information

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IPC IPC(8): G01D5/347G01F15/06
Inventor 陈健
Owner SHENZHEN JASON DIGITAL TECH CO LTD
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