CN103839397A - Data acquirer based on inductance type sensing technology and data acquisition method - Google Patents
Data acquirer based on inductance type sensing technology and data acquisition method Download PDFInfo
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- CN103839397A CN103839397A CN201410082943.3A CN201410082943A CN103839397A CN 103839397 A CN103839397 A CN 103839397A CN 201410082943 A CN201410082943 A CN 201410082943A CN 103839397 A CN103839397 A CN 103839397A
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Abstract
The invention relates to a remote meter reading system, solves the problems that the technology of a data acquirer in a conventional remote meter reading system is complicated and metering is inaccurate, and provides a data acquirer based on an inductance type sensing technology and a data acquisition method. According to the technical scheme, the data acquirer based on the inductance type sensing technology comprises a character wheel, a non-contact inductance sensor, an inductance-to-digital converter and a processor, wherein the non-contact inductance sensor comprises a specially-shaped metal sheet and a core-less induction coil; the specially-shaped metal sheet is arranged on the side surface of the character wheel; the deformation of the specially-shaped metal sheet corresponds to numbers on the outer ring of the character ring; the core-less induction coil is arranged on the side, which faces the character wheel, of the specially-shaped metal sheet and corresponds to the specially-shaped metal sheet; the core-less induction coil is connected with the inductance-to-digital converter; the inductance-to-digital converter is connected with the processor. The data acquirer based on the inductance type sensing technology has the beneficial effects of simple technology, accurate data and suitability for the remote meter reading system.
Description
Technical field
The present invention relates to long-distance meter-reading system, particularly the data acquisition technology in long-distance meter-reading system.
Background technology
Common gas meter, flow meter or tap water meter are mechanical gas table or mechanical type tap water meter, and its counting principle is to utilize the mobile drive count code wheel rotation of combustion gas or current to count, and realize automatic data logging, need to convert the rotation of counting code wheel to electric signal.Seen remote meter reading is divided into two classes substantially in the market, and a class is pulsed, and another kind of is direct reading.
The sensor of pulsed long-distance meter-reading system is mainly made up of tongue tube and magnet steel, magnet steel is arranged on character wheel, in the time that character wheel rotates, magnet steel also rotates thereupon, magnet steel is during near tongue tube, the shell fragment adhesive of tongue tube, when magnet steel leaves tongue tube, the shell fragment of tongue tube disconnects, and adhesive or the off-state of the shell fragment of Acquisition Circuit by judging tongue tube realize counting.Mainly there is following defect in pulsed long-distance meter-reading system: 1) counts inaccurate, in the time having external magnetic field to disturb near gas meter, flow meter or tap water meter, data are inaccurate, easily shake when the shell fragment adhesive of tongue tube or while disconnecting, these factors all can cause count inaccurate; 2) pulse sensor is owing to being to adopt the mode of accumulated counts, and Acquisition Circuit needs long-term power supply, as power-off Acquisition Circuit cannot work, meter is leaked in pulse, can cause data phenomenon on the low side.
Direct-reading long-distance meter-reading system mainly contains two kinds of resistance-type and photo-electrics, is called resistance-type direct-reading gage and photo-electric direct-reading gage.
The principle of work of resistance-type direct-reading gage is: by the hard contact of installing on character wheel, from the different resistance contacts on corresponding circuit board, identify the position of character wheel by different resistance values, resistance-type direct-reading gage implementation method is to fixedly mount circuit board between the character wheel of mechanical counter, on circuit board, be uniformly distributed 10 fan-shaped sheet metals, composition and the sizable circle of character wheel, this sheet metal is connected different resistance, on each character wheel, hard contact is installed, after assembling, can contact with circuit board, like this in the time that character wheel turns to a certain position, contact just contacts different circuit boards, can produce different resistance values, numeral on the corresponding counter of each resistance value, then obtain corresponding data by Acquisition Circuit processing, complete meter reading operation.The feature of resistance-type direct-reading gage is: can directly read the data character wheel from the data of Acquisition Circuit output, at ordinary times without power supply, principle is simple, realize easily, in general device can embed in table, change less to former list structure, this mode has realized the direct-reading of wheel digital, but also there are some problems: 1) measurement problem, character wheel belongs to the metering pen recorder of resistance-type direct-reading gage, in the time having external force to be in contact with it, can affect metering performance, this needs the character wheel group of resistance-type direct-reading gage producer redesign resistance-type direct-reading gage to reduce friction, this way of contact can produce mobile impact to the rotation of character wheel through long-time friction, 2) technological problems, because this contact is Mechanical Contact, installation process is depended in its contact force and position, and character wheel group has intrinsic gap error, increases after circuit board, the Edge Distance of circuit board and character wheel is nearer, cannot detect at installation rear high-lying character wheel, can produce like this because installation accuracy causes high-order character wheel and circuit board scraping impact and rotate, simultaneously, installation procedure and precision are all had relatively high expectations, and are unfavorable for batch production, 3) operation problem, because contact is mainly to identify by resistance mode, and resistance can be with temperature, contact point and changing, the temperature of resistance is floated with bad contact of contact may cause measuring blind area or erroneous judgement, and long-time running is difficult to ensure reliability, produces sometimes misread phenomenon.
The principle of work of photo-electric direct-reading gage is: republish specific markers (or the hole of opening different size on character wheel) at the edge of character wheel of counter printing 0～9 position of general gas table or tap water meter, at its peripheral fixed light electric transducer and interlock circuit, when externally fed meter reading, judge that by photoelectric sensor specific markers " has " and the state of " nothing ", judge to obtain the reading (being window value) of character wheel by assembly coding.The analog measurement mode that this side's ratio juris is no longer resistance-type, but by character wheel is set up to mathematical model, calculate through combination, draw correct reading.The photo-electric direct-reading gage adopting at present mainly contains two kinds of photoelectricity correlation (transmission) formula and photo-electric reflection types, its key distinction is that physical construction is different with mathematical algorithm, photoelectricity correlation (transmission) formula is the mode that photoelectric device and circuit board are installed between character wheel, and photo-electric reflection type is the mode that photoelectric device and circuit board are installed around character wheel.Photo-electric direct-reading gage has following characteristics: directly read counter code-disc numeral (being each character wheel window numeral) and obtain " window value ", in table, do not need to arrange the parameter such as the table truth of a matter, table constant, without storage data, there are not cumulative errors, really realize " meter reading ", the be through with history of accumulative total pulse, conversion numerical value, in direct-reading gage, the device such as electronic section and counter does not have Mechanical Contact to separate completely, does not affect measuring accuracy.Self yet there is following defect in photoelectric direct-reading meter: 1) interference free performance in some shortcomings that overcome resistance-type direct-reading gage: adopt infrared light photoelectric sensor, infrared receiving tube is easy to be subject to the impact of extraneous infrared light or natural light, even can cause sensor cannot work completely at extreme environment; 2) data accuracy: present character wheel of photo-electric direct-reading gage is general adopts five pairs of infrared sensors to come " reading ", five pairs of sensors can be differentiated at most 32 kinds of states in theory, but character wheel particularly high-order character wheel at one, the rotation in is among a small circle a continuous process, the character wheel " reading " in this time can only come by software " estimation ", run into multiple character wheels simultaneously carry in the situation that software " estimation " data out insecure often, in actual application process, also found such problem; 3) complex process need to be installed a lot of electrooptical devices on the character wheel of mechanical counter, causes cost higher simultaneously.
Summary of the invention
Technical matters to be solved by this invention, exactly in order to solve the complex process of data acquisition unit in present long-distance meter-reading system and to measure inaccurate shortcoming, provides a kind of data acquisition unit and collecting method based on inductive sensing technology.
The present invention solve the technical problem, the technical scheme adopting is, based on the data acquisition unit of inductive sensing technology, comprise character wheel, it is characterized in that, also comprise contactless inductance sensor, inductance is to digital quantizer and processor, described contactless inductance sensor comprises profiled metal sheet metal component and coreless induction coil, described profiled metal sheet metal component is arranged on character wheel side, the distortion of described profiled metal sheet metal component is corresponding with the numeral of character wheel outer ring, coreless induction coil is arranged on the homonymy of the relative character wheel of profiled metal sheet metal component, corresponding with profiled metal sheet metal component, coreless induction coil is connected with inductance to digital quantizer, inductance to digital quantizer is connected with processor.
Concrete, described profiled metal sheet metal component is the not closed circle structure of inductance gradual change, its center of circle is concentric with character wheel.
Further, described profiled metal sheet metal component is aluminum profiled metal sheet metal component or stainless steel profiled metal sheet metal component or conductive ink profiled metal sheet metal component processed.
Concrete, described inductance to digital quantizer is that LDC1000 inductance is to digital quantizer.
Based on the collecting method of inductive sensing technology, adopt the above-mentioned data acquisition unit based on inductive sensing technology, it is characterized in that, comprise the following steps:
Step 4, processor calculate numerical value corresponding to this digital signal according to the digital signal receiving and show.
The invention has the beneficial effects as follows, by above-mentioned data acquisition unit and collecting method based on inductive sensing technology, it utilizes profiled metal sheet metal component and coreless induction coil to respond in real time, accurately converse the shown data message of character wheel by induced flux information, technique is simple, data are accurate, and strong interference immunity.
Brief description of the drawings
Fig. 1 is the system chart of the embodiment of the present invention.
Fig. 2 is that in the embodiment of the present invention, profiled metal sheet metal component is arranged on the schematic diagram on character wheel.
Wherein, 101 is profiled metal sheet metal component, and 102 is coreless induction coil, and 103 is character wheel.
Embodiment
Below in conjunction with drawings and Examples, describe technical scheme of the present invention in detail.
Data acquisition unit based on inductive sensing technology of the present invention, by character wheel 103, contactless inductance sensor, inductance is to digital quantizer and processor composition, wherein, contactless inductance sensor comprises profiled metal sheet metal component 101 and coreless induction coil 102, profiled metal sheet metal component 101 is arranged on character wheel 103 sides, the distortion of described profiled metal sheet metal component 101 is corresponding with the numeral of character wheel 103 outer rings, coreless induction coil 102 is arranged on the homonymy of profiled metal sheet metal component 101 relative character wheels 103, corresponding with profiled metal sheet metal component 101, coreless induction coil 102 is connected with inductance to digital quantizer, inductance to digital quantizer is connected with processor.Collecting method based on inductive sensing technology of the present invention is: adopt the above-mentioned data acquisition unit based on inductive sensing technology, in the time that character wheel 103 rotates, drive the profiled metal sheet metal component 101 on it to rotate together, the real-time induced flux information of coreless induction coil 102 is also transferred to inductance to digital quantizer, inductance is converted to digital data transmission to processor to digital quantizer by the flux information sensing, processor calculates numerical value corresponding to this digital signal according to the digital signal receiving and shows.
Embodiment
As shown in Figure 1, wherein, profiled metal sheet metal component 101 is the not closed circle structure of inductance gradual change to the system chart of the data acquisition unit based on inductive sensing technology of this example, and its center of circle is concentric with character wheel 103, and its schematic diagram is as Fig. 2.
The data acquisition unit based on inductive sensing technology of this example, by character wheel 103, contactless inductance sensor, inductance is to digital quantizer and processor composition, wherein, contactless inductance sensor comprises profiled metal sheet metal component 101 and coreless induction coil 102, profiled metal sheet metal component 101 is arranged on character wheel 103 sides, the distortion of described profiled metal sheet metal component 101 is corresponding with the numeral of character wheel 103 outer rings, coreless induction coil 102 is arranged on the homonymy of profiled metal sheet metal component 101 relative character wheels 103, corresponding with profiled metal sheet metal component 101, coreless induction coil 102 is connected with inductance to digital quantizer, inductance to digital quantizer is connected with processor.
Here, profiled metal sheet metal component 101 is the not closed circle structure of inductance gradual change, and its center of circle is concentric with character wheel 103, can be aluminum profiled metal sheet metal component or stainless steel profiled metal sheet metal component or conductive ink profiled metal sheet metal component processed.Inductance to digital quantizer be LDC1000 inductance to digital quantizer, it provides the resonance impedance of 16 and the inductance value of 24, thereby can in location sensing application, realize submicron resolution.In addition, inductive sensing also can tolerate such as the non-conductive interference such as dirt and dust, thereby makes it be applicable to very much extreme environment and harsh and unforgiving environments.
When use, when character wheel 103 rotates, drive the profiled metal sheet metal component 101 on it to rotate together, the real-time induced flux information of coreless induction coil 102 is also transferred to inductance to digital quantizer, inductance is converted to digital data transmission to processor to digital quantizer by the flux information sensing, processor calculates numerical value corresponding to this digital signal according to the digital signal receiving and shows.
Because the distortion of profiled metal sheet metal component 101 is corresponding with the numeral of character wheel 103 outer rings, therefore in the time that the window numerical value (showing data) of character wheel 103 changes, the magnetic flux that coreless induction coil 102 senses must change, thereby can go out by the change calculations of magnetic flux the window numerical value of current character wheel.
Claims (5)
1. the data acquisition unit based on inductive sensing technology, comprise character wheel, it is characterized in that, also comprise contactless inductance sensor, inductance is to digital quantizer and processor, described contactless inductance sensor comprises profiled metal sheet metal component and coreless induction coil, described profiled metal sheet metal component is arranged on character wheel side, the distortion of described profiled metal sheet metal component is corresponding with the numeral of character wheel outer ring, coreless induction coil is arranged on the homonymy of the relative character wheel of profiled metal sheet metal component, corresponding with profiled metal sheet metal component, coreless induction coil links with inductance to digital quantizer, inductance to digital quantizer and processor links.
2. the data acquisition unit based on inductive sensing technology according to claim 1, is characterized in that, described profiled metal sheet metal component is the not closed circle structure of inductance gradual change, and its center of circle is concentric with character wheel.
3. the data acquisition unit based on inductive sensing technology according to claim 2, is characterized in that, described profiled metal sheet metal component is aluminum profiled metal sheet metal component or stainless steel profiled metal sheet metal component or conductive ink profiled metal sheet metal component processed.
4. the data acquisition unit based on inductive sensing technology according to claim 2, is characterized in that, described inductance to digital quantizer is that LDC1000 inductance is to digital quantizer.
5. the collecting method based on inductive sensing technology, adopts the data acquisition unit based on inductive sensing technology as described in claim 1～4 any one, it is characterized in that, comprises the following steps:
Step 1, in the time that character wheel rotates, drive the profiled metal sheet metal component on it to rotate together;
Step 2, the real-time induced flux information of coreless induction coil are also transferred to inductance to digital quantizer;
Step 3, inductance to digital quantizer are converted to digital data transmission to processor by the flux information sensing;
Step 4, processor calculate numerical value corresponding to this digital signal according to the digital signal receiving and show.
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| CN201410082943.3A CN103839397A (en) | 2014-03-07 | 2014-03-07 | Data acquirer based on inductance type sensing technology and data acquisition method |
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Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106643822A (en) * | 2016-12-23 | 2017-05-10 | 艾特仪表科技（深圳）有限公司 | Character wheel encoder and direct reading method |
| CN106997819A (en) * | 2016-01-26 | 2017-08-01 | 梅特勒-托利多(常州)测量技术有限公司 | A kind of metal key-press |
| CN107122823A (en) * | 2017-04-24 | 2017-09-01 | 四川科伦药业股份有限公司 | The sensor counted is moved for transfusion flexible bag |
| CN110057280A (en) * | 2019-03-28 | 2019-07-26 | 中国电力科学研究院有限公司 | A kind of the monitoring system and monitoring method of contact of breaker stroke |
| CN111396621A (en) * | 2014-09-15 | 2020-07-10 | 芙罗服务管理公司 | Sensor for a valve system, valve system including a sensor, and related methods |
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Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN111396621A (en) * | 2014-09-15 | 2020-07-10 | 芙罗服务管理公司 | Sensor for a valve system, valve system including a sensor, and related methods |
| CN111396621B (en) * | 2014-09-15 | 2022-07-08 | 芙罗服务管理公司 | Sensor for a valve system, valve system including a sensor, and related methods |
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| CN107122823A (en) * | 2017-04-24 | 2017-09-01 | 四川科伦药业股份有限公司 | The sensor counted is moved for transfusion flexible bag |
| CN110057280A (en) * | 2019-03-28 | 2019-07-26 | 中国电力科学研究院有限公司 | A kind of the monitoring system and monitoring method of contact of breaker stroke |
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Address after: 611130, No. three, section 456, hot spring road, Chengdu science and Technology Industry Development Zone, Chengdu District, Wenjiang District, Sichuan, China Applicant after: Sichuan Hengxin Science and Technology Co., Ltd. Address before: 610041 Sichuan city of Chengdu province high tech Zone nine Hing Road No. ten building 6 floor Kim Applicant before: Sichuan Hengxin Science and Technology Co., Ltd. |
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Address after: 611130, No. three, section 456, hot spring road, Chengdu science and Technology Industry Development Zone, Chengdu District, Wenjiang District, Sichuan, China Applicant after: Sichuan Heng Polytron Technologies Inc Address before: 611130, No. three, section 456, hot spring road, Chengdu science and Technology Industry Development Zone, Chengdu District, Wenjiang District, Sichuan, China Applicant before: Sichuan Hengxin Science and Technology Co., Ltd. |
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Application publication date: 20140604 |