CN2513085Y - Coded gas meter with far distance reading function - Google Patents
Coded gas meter with far distance reading function Download PDFInfo
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- CN2513085Y CN2513085Y CN 00235094 CN00235094U CN2513085Y CN 2513085 Y CN2513085 Y CN 2513085Y CN 00235094 CN00235094 CN 00235094 CN 00235094 U CN00235094 U CN 00235094U CN 2513085 Y CN2513085 Y CN 2513085Y
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Abstract
The utility model relates to a coding gas meter with a distance reading function. On the basis of the traditional gas meter, the coding gas meter converts the rotational angular displacement of a character wheel in the gas meter to a binary level sequence denoting the angular displacement with the coding principle. The gas meter also comprises a distance reading circuit which is composed of a data selector, a digital comparator, an address counter, an address coding switch, a tri-state gate circuit, etc. The gas meter is connected with a reading computer through a five-core bus which comprises a power line, a ground line, an address code selecting pulse line, an output signal line and an address code zero clearing line. The gas meter has the advantages of stable performance, cheapness and digital teletransmission.
Description
The civilian gas meter of tradition adopts mechanical character wheel formula register.It is simple in structure, and reliable operation stands the test of last 100 years and uses till today.But after the epoch entered digitizing, it was on the verge of being replaced.Reason is exactly that its reading can not digitizing.The various electronics gas meters attempt of liking the bees rising in swarms replaces at one stroke, and too high or unstable properties difficulty is accepted extensively by market because of cost eventually.Gas meter realizes that digitized final purpose is to realize the remote meter reading of robotization.The mechanical character wheel formula version of traditional gas meter if can be improved, make it adapt to the digitizing requirement, and can realize the remote meter reading of robotization, will make ancient gas meter account for tool market again.
The purpose of this utility model is to provide a kind of improved coded measuring gas meter with remote meter-reading function that carries out on traditional gas meter basis.
The utility model is on traditional gas meter basis, adds code wheel in gas meter.Be carved with corner information on the described code wheel.And the probe of a group of received code wheel angle position information is set on the relevant position.Described probe is converted into the corner information on the code wheel binary coding level that can drive digital circuit.This gas meter also comprises a remote meter reading circuit, and this circuit also comprises one group of five core buses output of being made up of power lead, ground wire, address code strobe pulse line, output signal line and address code zero clearing line, can be connected with the computing machine corresponding end of checking meter; Described remote meter reading circuit is made up of data selector, digital comparator, address counter, geocoding switch and tri-state gate circuit.Described probe is connected with output signal line by each input end of data selector.Described address counter comprises address selection pulse line end and address zero clearing line end, and respectively with the address selection taps and address corresponding connection of zero clearing line of described bus.The low level output terminal of described address counter is connected with the control end of data selector, can do gating control to a certain position code level.And the output of its high position is connected with digital comparator.Other has a geocoding switch also to be connected with digital comparator, when described digital comparator equates with the address code of gas meter in the high-order output of counter, will open the triple gate on the signal wire that links to each other with data selector output, and data will send out.
The utility model is keeping on traditional gas meter stable performance and the advantages of being cheap basis, has realized the remote meter reading of digitizing and robotization.This gas meter under the situation of any power down, do not lose write down use gas information.
The drawing explanation:
Fig. 1 is the structured flowchart with coded measuring gas meter of remote meter-reading function described in the utility model.
Fig. 2 is the schematic diagram of the remote meter reading circuit of the coded measuring gas meter with remote meter-reading function described in the utility model.
The principle of work of register briefly is exactly the measurement that the measurement of electric weight is converted to mechanical location.Or say the deflection angle that other physical quantitys is converted to character wheel in the register.We keep the character wheel meter degree principle of register, thereby have kept its reliability and cheap structure thereof in transfer process.And additional code is taken turns in register.Measuring corner with code wheel is a kind of method in the geometric measurement.Its ultimate principle (seeing accompanying drawing) is to be carved with one group of concentric circles on a disk 1, and the binary information in a certain position of expression is arranged on each concentric circles.The corresponding probe 2 of each binary digit.The binary coding level of the exportable relative coding wheel current location of popping one's head in.After in register, adopting code wheel, just realized digitizing.
Gas meter realizes that digitized final purpose is to realize the remote meter reading of robotization.Therefore the digitizing gas meter must have the remote meter reading circuit.The schematic diagram of remote meter reading circuit as shown in drawings, its core concept is exactly pulse address.One addressing impulse meter is arranged in the circuit.The addressing pulse of sending in order to the record access computing machine.The counter low portion is through a certain position of data selector gates code level.The high position output of counter is compared with the sequence of levels (the geocoding switch is represented) of the current gas meter of expression address through digital comparator.When the high-order output of counter equates with the geocoding of gas meter, the triple gate on will the opening signal line.The computing machine of checking meter just can read in certain bit data.When the addressing pulse increases, each code level will in turn appear on the signal wire, change until the high-order output of counter, and then begin to visit another gas meter.
Hundreds and thousands of coded measuring gas meters are linked together in the mode that bus connects, and follow inspection by a computing machine.Both can on a computing machine, unify to show the metering result, also can on small-sized display device, show respectively.As the gas meter of concentrating type, the connection of bus mode is the simplest beyond doubt.
The remote meter reading embodiment of circuit is seen Fig. 2
The address pulse that access computer is sent is admitted to 12 digit counters that are in series by two two 4 digit counters (74xx393).This counter has two functions.The first produces data bit cells by low 4, and also promptly each of low 4 is counted all a certain positions of corresponding data.It two is to represent the table address that access computer will be sought by most-significant byte.When the table address that sets when counter most-significant byte and 8 toggle switches was identical, the 3rd pin of two 4 bit data comparers (74xx85) became high level.Sheffer stroke gate A is opened.The output of Sheffer stroke gate has started triple gate B again.At this moment data selector (74xx150) is selected certain bit data by low 4 requirements of counter and it is delivered on the data signal line.When counter most-significant byte and table address were inequality, data signal line was high-impedance state.
The circuit of accompanying drawing 2 can be to 44 code-wheel step-by-step reading of data.The maximum address of circuit represents that scope is 0～255.Increase a counter high position and data comparator and can enlarge address realm.The remote meter reading circuit is installed in the gas meter, adopts five core buses to connect with access computer.Its five heart yearn is respectively: (1) power lead; (2) address wire; (3) address code strobe pulse line; (4) output signal line; (5) address code zero clearing line.Its function is: when preset address in the circuit equated with the number of address code input pulse, the output one digit number was according to level on output signal line.Preset address has a scope to same circuit, with the different position of correspondence coding.Zero clearing level on the address code zero clearing line can make the address pulse counter O reset of circuit.
Claims (2)
1 has the coded measuring gas meter of remote meter-reading function, and it can comprise character wheel register structure, it is characterized in that: increase code wheel on the basis of character wheel register structure, and the probe of a group of received code wheel angle position information is set on the relevant position.
2 coded measuring remote reading gas meters according to claim 1, it is characterized in that: this gas meter also comprises a remote meter reading circuit, each coded measuring gas meter with remote meter-reading function all is assigned with an address code, described remote meter reading circuit is by data selector, digital comparator, address counter, the geocoding switch is formed with tri-state gate circuit and is connected with other coded measuring gas meters and the computing machine of checking meter with bus mode, described bus comprises power lead, ground wire, address code strobe pulse line, output signal line and address code zero clearing line, described probe is connected with output signal line by each input end of data selector, described address counter comprises address selection pulse line end and address zero clearing line end, and respectively with the address selection taps and address corresponding connection of zero clearing line of described bus, the low level output terminal of described address counter is connected with the control end of data selector, can do gating control to a certain position code level, and the output of its high position is connected with digital comparator, other has a geocoding switch also to be connected with digital comparator, and described code switch is represented the address code of certain coded measuring gas meter.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00235094 CN2513085Y (en) | 2000-05-21 | 2000-05-21 | Coded gas meter with far distance reading function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 00235094 CN2513085Y (en) | 2000-05-21 | 2000-05-21 | Coded gas meter with far distance reading function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2513085Y true CN2513085Y (en) | 2002-09-25 |
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ID=33596994
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 00235094 Expired - Fee Related CN2513085Y (en) | 2000-05-21 | 2000-05-21 | Coded gas meter with far distance reading function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2513085Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427896C (en) * | 2006-01-12 | 2008-10-22 | 谈晓彬 | Angle detector |
| CN105628127A (en) * | 2015-12-29 | 2016-06-01 | 成都兴联宜科技有限公司 | Method for achieving channel number identification of photoelectric directly-read wired remote gas meter |
| CN109298243A (en) * | 2018-09-06 | 2019-02-01 | 国营芜湖机械厂 | A kind of multichannel sensor internal resistance rapid measurement device and its application method |
-
2000
- 2000-05-21 CN CN 00235094 patent/CN2513085Y/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100427896C (en) * | 2006-01-12 | 2008-10-22 | 谈晓彬 | Angle detector |
| CN105628127A (en) * | 2015-12-29 | 2016-06-01 | 成都兴联宜科技有限公司 | Method for achieving channel number identification of photoelectric directly-read wired remote gas meter |
| CN109298243A (en) * | 2018-09-06 | 2019-02-01 | 国营芜湖机械厂 | A kind of multichannel sensor internal resistance rapid measurement device and its application method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C57 | Notification of unclear or unknown address | ||
| DD01 | Delivery of document by public notice |
Addressee: Zheng Hong Document name: Notification of Termination of Patent Right |
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| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |