CN102200459A - Direct reading gauge - Google Patents
Direct reading gauge Download PDFInfo
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- CN102200459A CN102200459A CN 201010132736 CN201010132736A CN102200459A CN 102200459 A CN102200459 A CN 102200459A CN 201010132736 CN201010132736 CN 201010132736 CN 201010132736 A CN201010132736 A CN 201010132736A CN 102200459 A CN102200459 A CN 102200459A
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- character wheel
- steel sheet
- excitation device
- excitation
- exciting bank
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Abstract
The invention relates to a direct reading gauge, comprising a single-digit character wheel, an excitation device, and a stainless steel sheet pre-embedded in the center of the character wheel. A selection signal is lowered, and the excitation signal gives out an excitation, so that LC resonance is caused; as a steel sheet is shaped as an asymptotic line, when the character wheel rotates from 0 to 9, the excitation device and the steel sheet get closer and closer. If the steel sheet of the character wheel is far away from the excitation device, the oscillation from start to attenuation can last longer time; if the steel sheet is close to the excitation device, as the steel sheet absorbs energy of an inductor in the excitation device, the oscillation attenuates quickly, and therefore signals detected at the SELECT end at 0-9 positions of the character wheel are different; within a certain clock cycle after emission of the excitation, an AD (Analogue/Digital) converter is used for sampling the levels at the Select end, and the levels are averaged within each cycle. The amplitude scope (the amplitude scope includes ten sections, and each section represents the position of one digit) of the excitation device is judged according to the level amplitude, and then the position of the excitation device is judged, thus the accurate reading of the character wheel is obtained.
Description
(1) technical field
The invention belongs to the electrical instrumentation field, a kind of specifically direct-reading gage.
(2) background technology
Direct-reading gage comes out the character wheel number of showing " direct-reading " by the mode of coding and decoding, is the physical location compiling of numerical digit on the character wheel.Most direct-reading gage all adopts the M-BUS communication on the market, with transmission-type photo-electronic directly reading table is example: adopt the photoelectric encoder principle, with each character wheel as a code-disc, the infrared light that light tank on five infrared receiving tubes induction character wheel is penetrated and cause that the variation of level forms one group of five-digit number sign indicating number, decoding back teletransmission to system computer show on the interface of checking meter and show the identical numeral of window indicating value.The photo-electronic directly reading table not chargedly is operated in pure machine performance in the time of work, power to the direct-reading gage terminal by host computer in the moment that system checks meter, and character wheel information changed into by the electric signal of system protocol coding read by signal wire, the electric current during communication is provided by the M-BUS bus.This type of direct-reading gage needs to do water-proofing treatment on sealing technology, and infrared light is subject to light, ambient humidity influences, thereby causes reading unreliable.Therefore there is following defective in direct-reading gage: direct-reading gage is when circuit design, and element is more, and cost is bigger, the circuit design more complicated; In application process, be example with the water meter, the direct-reading module application can directly be used when dry-type meter, but the direct-reading module application need be done water-proofing treatment (half fluid-tight) when wet-type meter.
A kind of direct-reading gage of my company's patent of invention can overcome the above problems.
(3) summary of the invention
The purpose of this invention is to provide a kind of direct-reading gage.
The technical scheme that its technical matters of solution of the present invention is taked is:
A kind of direct-reading gage comprises a position character wheel, exciting bank, is embedded in a stainless steel substrates of character wheel central authorities.Described exciting bank is made up of the LC oscillatory circuit.It is characterized in that: the position of exciting bank is changeless, and the stainless steel substrates and the character wheel that are embedded in character wheel central authorities rotate synchronously.Its principle is: will select signal (SELECT) to put low, simultaneously provide an excitation in pumping signal (TRIGGER), make it that LC resonance take place, since stainless steel substrates be shaped as the asymptotic line shape, when character wheel was rotated by the position of 0 position to 9, the distance of exciting bank and steel disc was more and more nearer.When the steel disc of character wheel was far away apart from exciting bank, being equivalent to did not have steel disc, vibration sustainable long period from beginning to decaying, is called undamped oscillation; When if steel disc is very near apart from exciting bank, because steel disc has absorbed the energy of inductance in the exciting bank, vibration can decay very fast, is called damped oscillation.Therefore, it is different holding detected signal at SELECT on 0～9 position of character wheel, the certain clock period after excitation is sent, use the level of AD sampling SELECT port, and the level in each cycle is averaged.Judge the amplitude range of exciting bank according to the size of level amplitude, judge the residing position of exciting bank then, thereby obtain character wheel reading accurately.The amplitude range of level is divided into 10 segmentations, and the position of a numeral is represented in each segmentation.The segmentation of this numerical value will be determined the span of each position correspondence by a large amount of tests.
The invention has the beneficial effects as follows:
(1), a kind of direct-reading gage circuit of the present invention is simple, components and parts are few, cost is low, is easy to realize.
(2), all fluid-tights of a kind of direct-reading gage circuit of the present invention, and can guarantee accuracy of reading.
(4) description of drawings
Accompanying drawing 1 is a kind of direct-reading gage direct-reading of the present invention module diagram
Accompanying drawing 2 is a kind of direct-reading gage exciting bank of the present invention LC oscillatory circuit
Accompanying drawing 3 for a kind of direct-reading gage character wheel of the present invention at 10 signals that the position is arrived in the SELECT position probing of 0～9
(5) embodiment
Below in conjunction with accompanying drawing technical scheme of the present invention is described in further detail.
As shown in Figure 1: a kind of direct-reading gage comprises position character wheel, an exciting bank A (position is fixed), is embedded in a stainless steel substrates B (rotating synchronously with character wheel) of character wheel central authorities.
As shown in Figure 2: exciting bank is made up of the LC oscillatory circuit.
When operate as normal, to select signal (SELECT) to put low, simultaneously provide an excitation in pumping signal (TRIGGER), make it that LC resonance take place, since stainless steel substrates be shaped as the asymptotic line shape, when character wheel was rotated by the position of 0 position to 9, the distance of exciting bank and steel disc was more and more nearer.When the steel disc of character wheel was far away apart from exciting bank, promptly character wheel was when 0 position, and being equivalent to does not have steel disc, vibration sustainable long period from beginning to decaying, is called undamped oscillation; When if steel disc is very near apart from exciting bank, promptly character wheel is when 9 position, because steel disc has absorbed the energy of inductance in the exciting bank, vibration can decay very fast, is called damped oscillation.Therefore, when character wheel is turned to 9 position by 0 position, exciting bank and steel disc be different apart from distance, so on 0～9 position of character wheel, detect to such an extent that signal also is different at the SELECT end, as shown in Figure 3.In certain clock period t1～t2 after excitation is sent and the t3～t4 (also can detect the more time cycle), use the level of AD sampling SELECT port, the level in each cycle is averaged.Judge the amplitude range of exciting bank according to the size of level amplitude, judge the residing position of exciting bank then, thereby obtain character wheel reading accurately.The amplitude range of level is divided into 10 segmentations, and the position of a numeral is represented in each segmentation.The segmentation of this numerical value will be determined the span of each position correspondence by a large amount of tests.
Claims (2)
1. a direct-reading gage comprises a position character wheel, exciting bank, is embedded in a stainless steel substrates of character wheel central authorities; Described exciting bank is made up of the LC oscillatory circuit; It is characterized in that: the position of exciting bank is changeless, and the stainless steel substrates and the character wheel that are embedded in character wheel central authorities rotate synchronously, and stainless steel substrates be shaped as asymptotic line.
2. a kind of direct-reading gage according to claim 1, it is characterized in that: provide a pumping signal by control circuit, make it produce LC resonance, the oscillation amplitude of LC resonance is subjected to the influence of steel disc distance, judge the amplitude range of exciting bank according to the size of level amplitude, judge the residing position of exciting bank then, thereby obtain character wheel reading accurately, the amplitude range of level is divided into 10 segmentations, the position of a numeral is represented in each segmentation, and the segmentation of this numerical value will be determined the span of each position correspondence by a large amount of tests.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010132736 CN102200459A (en) | 2010-03-26 | 2010-03-26 | Direct reading gauge |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201010132736 CN102200459A (en) | 2010-03-26 | 2010-03-26 | Direct reading gauge |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN102200459A true CN102200459A (en) | 2011-09-28 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201010132736 Pending CN102200459A (en) | 2010-03-26 | 2010-03-26 | Direct reading gauge |
Country Status (1)
| Country | Link |
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| CN (1) | CN102200459A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791973A (en) * | 2014-03-07 | 2014-05-14 | 四川恒芯科技有限公司 | Non-core coil induction type meter data collection device |
| CN103839397A (en) * | 2014-03-07 | 2014-06-04 | 四川恒芯科技有限公司 | Data acquirer based on inductance type sensing technology and data acquisition method |
| CN104048723A (en) * | 2014-06-30 | 2014-09-17 | 江苏赛达电子科技有限公司 | Separation non-magnetic type remote water meter with sampling on large pointer |
| CN104330099A (en) * | 2014-09-05 | 2015-02-04 | 浙江利尔达物联网技术有限公司 | Inductance sensing type data acquisition apparatus and acquisition method |
Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1026625A (en) * | 1963-02-06 | 1966-04-20 | Ball Brothers Res Corp | Environmental measuring instrumentation |
| CN1563908A (en) * | 2004-03-12 | 2005-01-12 | 杭州利尔达单片机技术有限公司 | Non-magnet senser measurer and its measuring method |
| CN2864623Y (en) * | 2006-01-12 | 2007-01-31 | 南京遥讯电子系统有限公司 | Integrated water level remote sensor |
| CN1928899A (en) * | 2006-01-06 | 2007-03-14 | 宁波水表股份有限公司 | Mechanical counter for electromagnetic induction coding |
-
2010
- 2010-03-26 CN CN 201010132736 patent/CN102200459A/en active Pending
Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1026625A (en) * | 1963-02-06 | 1966-04-20 | Ball Brothers Res Corp | Environmental measuring instrumentation |
| CN1563908A (en) * | 2004-03-12 | 2005-01-12 | 杭州利尔达单片机技术有限公司 | Non-magnet senser measurer and its measuring method |
| CN1928899A (en) * | 2006-01-06 | 2007-03-14 | 宁波水表股份有限公司 | Mechanical counter for electromagnetic induction coding |
| CN2864623Y (en) * | 2006-01-12 | 2007-01-31 | 南京遥讯电子系统有限公司 | Integrated water level remote sensor |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103791973A (en) * | 2014-03-07 | 2014-05-14 | 四川恒芯科技有限公司 | Non-core coil induction type meter data collection device |
| CN103839397A (en) * | 2014-03-07 | 2014-06-04 | 四川恒芯科技有限公司 | Data acquirer based on inductance type sensing technology and data acquisition method |
| CN103791973B (en) * | 2014-03-07 | 2017-05-10 | 四川恒芯科技股份有限公司 | Non-core coil induction type meter data collection device |
| CN104048723A (en) * | 2014-06-30 | 2014-09-17 | 江苏赛达电子科技有限公司 | Separation non-magnetic type remote water meter with sampling on large pointer |
| CN104330099A (en) * | 2014-09-05 | 2015-02-04 | 浙江利尔达物联网技术有限公司 | Inductance sensing type data acquisition apparatus and acquisition method |
| CN104330099B (en) * | 2014-09-05 | 2016-08-24 | 浙江利尔达物联网技术有限公司 | A kind of inductance vicarious data acquisition unit and acquisition method thereof |
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Application publication date: 20110928 |