CN105823495A - Mechanical counter reading device and method - Google Patents
Mechanical counter reading device and method Download PDFInfo
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- CN105823495A CN105823495A CN201610184149.9A CN201610184149A CN105823495A CN 105823495 A CN105823495 A CN 105823495A CN 201610184149 A CN201610184149 A CN 201610184149A CN 105823495 A CN105823495 A CN 105823495A
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- 239000000523 sample Substances 0.000 claims abstract description 67
- 230000003287 optical effect Effects 0.000 claims abstract description 51
- 239000013307 optical fiber Substances 0.000 claims description 27
- 238000007689 inspection Methods 0.000 claims description 22
- 238000004020 luminiscence type Methods 0.000 claims description 22
- 238000012360 testing method Methods 0.000 claims description 16
- 238000006243 chemical reaction Methods 0.000 claims description 7
- 230000005693 optoelectronics Effects 0.000 claims description 7
- 230000008033 biological extinction Effects 0.000 claims description 2
- 239000000463 material Substances 0.000 claims description 2
- 238000001514 detection method Methods 0.000 abstract description 5
- 238000010586 diagram Methods 0.000 description 3
- 239000000835 fiber Substances 0.000 description 3
- 230000000694 effects Effects 0.000 description 2
- 238000005516 engineering process Methods 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 206010003084 Areflexia Diseases 0.000 description 1
- 230000002159 abnormal effect Effects 0.000 description 1
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- 239000003086 colorant Substances 0.000 description 1
- 238000000151 deposition Methods 0.000 description 1
- 238000012423 maintenance Methods 0.000 description 1
- 239000013308 plastic optical fiber Substances 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 238000004080 punching Methods 0.000 description 1
- 230000035945 sensitivity Effects 0.000 description 1
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Classifications
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/34707—Scales; Discs, e.g. fixation, fabrication, compensation
- G01D5/34715—Scale reading or illumination devices
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/26—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light
- G01D5/32—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light
- G01D5/34—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells
- G01D5/347—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable characterised by optical transfer means, i.e. using infrared, visible, or ultraviolet light with attenuation or whole or partial obturation of beams of light the beams of light being detected by photocells using displacement encoding scales
- G01D5/3473—Circular or rotary encoders
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
- G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus
- G01F15/07—Integration to give total flow, e.g. using mechanically-operated integrating mechanism
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Abstract
The present invention provides a mechanical counter reading device and method. A mechanical counter has a plurality of print wheel discs, ten reading scales from 0 to 9 are arranged at the angle of 360 degrees at regular intervals on the each print wheel disc, and four evenly spaced encoding holes are arranged at the middle part of a sector corresponding to each reading scale of each print wheel disc along the direction of the center of circle. A luminescent device is correspondingly connected with a luminescent probe through a splitter, the luminescent probe is arranged at one side of the print wheel discs, and an optical detection probe is correspondingly arranged at the other side of the print wheel discs, so that it is suitable for allowing the encoding holes to transmit optical signals when the print wheel discs are rotating; and the optical detection probe sends the received optical signals to an optical detection device, the optical detection device in a signal processor converts the optical signals to corresponding electric signals, the signal processor identifies binary codes according to the received electric signals corresponding to the encoding holes, and the reading scales of the print wheel discs are read in order to combine and complete the reading and identification of the mechanical counter. According to the invention, the connection structure is optimized, and the encoding fault-tolerant and anti-misoperation capability and the reading efficiency are improved.
Description
Technical field
The present invention relates to mechanical counter reading device, particularly relate to a kind of water supply, the mechanical counter reading plotter of gas meter use and method.
Background technology
Existing count table optical fiber reading technology scheme is divided into two classes, and a class is the truth of a matter directly reading count table, another kind of by calculating high place reading to lowest order character wheel disk statistics number of revolutions is accumulative.The problem of latter class scheme maximum is that copy reading equipment power down or fault (as software work is abnormal) once occurs, table counting will be caused to be failed to record, the needs scene of sending someone reads the truth of a matter, the initial number of copy reading equipment carries out calibration, and could the most correctly to start copy reading, maintenance workload and cost high.Previous class scheme is the most perfect, but in prior art, most employing power supply circuits are built in count table, thus realizes powering to luminous tube and receipts light pipe, and when being used to gas meter, such scheme exists potential safety hazard.Also having some schemes then to use completely passive mode, fibre-optical probe is built in count table, power supply circuits are the most external outside count table, decrease potential safety hazard to a certain extent.
The patent of invention of Application No. CN200410066148.1 " optical fiber type directly reads the device that mechanical counter is digital " discloses a kind of method that optical fiber type directly reads mechanical counter, the method prints tetrad code color mark on the circumferential surface that each character wheel of gas meter is other, use four optical fiber luminescences to be respectively irradiated to four coding colors to put on, on colour code, the reflection of light can be symbolized otherness by different numerical digit colour codes, other four fiber laser arrays have areflexia light to get the tetrad code that character is corresponding, thus obtain the corresponding numeral that current character wheel disk shows, the program uses number of fibers and optical fiber probe more, and connect complexity, high cost, circuit part from gas meter too close to deposit potential safety hazard, should not promote the use of.
Summary of the invention
The shortcoming of prior art in view of the above, it is an object of the invention to provide a kind of mechanical counter reading plotter and method, is used for solving in prior art optical fiber probe and number of fibers is more and connects complexity, the problem depositing potential safety hazard.
For achieving the above object and other relevant purposes, it is an object of the invention to provide the reading plotter of a kind of mechanical counter, described reading plotter is for the reading of reading mechanical counter, described mechanical counter has multiple character wheel disk, this character wheel disk is provided with 0～90 read text scale at interval of 36 degree, it is provided with four equally spaced notches along its direction, center of circle in the middle of the sector that on described character wheel disk, each read text scale is corresponding, described reading plotter includes sending out/inspection light probe, send out/device for testing light part, point/splicer and signal processor
Described luminescent device connects luminescence probe by beam splitter correspondence, described luminescence probe is arranged at the side of described character wheel disk, described inspection light probe is correspondingly arranged in this character wheel disk opposite side, be suitable to make notch transmit optical signal when character wheel disc rotary, the optical signal received is sent to described device for testing light part by described inspection light probe by splicer, described device for testing light part carries out opto-electronic conversion and processes the described signal processor of connection, the signal of telecommunication identification binary code that this signal processor is corresponding according to receiving notch, the read text scale being successively read character wheel disk has combined the reading knowledge of mechanical counter.
Another object of the present invention is to provide the number reading method of a kind of mechanical counter, including:
The optical signal controlling to export character wheel disk side successively is opening；
When the optical signal that and if only if described character wheel disk is corresponding is opening, detect the optical signal of described character wheel disk output；
Described optical signal is carried out opto-electronic conversion and obtains the binary code of described character wheel disk, identify that described binary code obtains the current reading of described character wheel disk；
Read the current reading of all character wheel disks, the reading of mechanical counter as described in number bit sequence combination producing.
As it has been described above, the mechanical counter of the present invention and reading plotter thereof and method, have the advantages that
The present invention uses each beam splitter correspondence to connect the luminescence probe of each character wheel disk, by the inspection light probe of corresponding for all character wheel disks same numerical digit output is connected to same splicer, use four beam splitters and four combiners respectively, thus decrease the usage quantity of optical fiber and optical module, save cost, optimize attachment structure；Meanwhile, the read text scale that described character wheel disk is corresponding is different binary code, and this binary code is different from the character code at least two of the same numerical digit of its forward and backward binary code, improves the anti-error ability of input tolerant for Chinese；The luminescent device used is cold light light source, when being used in gas meter, eliminates potential safety hazard；And circuit processing part is away from gas meter, without potential safety hazard；Controlled optical fiber luminescent port corresponding to each character wheel disk by signal processor successively thus read the reading of corresponding character wheel disk current scale, and the optical fiber luminescent port only having this character wheel disk corresponding when reading the read text scale of corresponding character wheel disk is in opening every time, the optical fiber luminescent port that remaining character wheel disk is corresponding is closed mode, it is made quickly to identify the read text scale of each character wheel disk, shorten the reading duration of mechanical counter, improve the reading efficiency of mechanical counter.
Accompanying drawing explanation
Fig. 1 is shown as the structural representation of the character wheel disk of the mechanical counter of the present invention；
Fig. 2 is shown as the notch structural representation of the mechanical counter character wheel disk of the present invention；
The optical fiber probe of the mechanical counter that Fig. 3 is shown as the present invention is placed in the structured flowchart of character wheel disk；
The optical fiber probe of the mechanical counter that Fig. 4 is shown as the present invention is placed in another example structure block diagram of character wheel disk；
Fig. 5 is shown as the reading plotter structured flowchart of the mechanical counter of the present invention；
Fig. 6 is shown as the number reading method flow chart of the mechanical counter of the present invention；
Fig. 7 is shown as the detail flowchart of number reading method step S503 in Fig. 5 of the present invention；
Fig. 8 is shown as the detail flowchart of number reading method step S603 in Fig. 5 of the present invention.
Element numbers illustrates:
1 character wheel disk
2 notches
3 luminescence probes
4 inspection light probes
5 probe brackets
6 optical fiber
7 luminescent devices
8 device for testing light parts
9 signal processors
10 beam splitters
11 splicers
12 shading baffles
Detailed description of the invention
Below by way of specific instantiation, embodiments of the present invention being described, those skilled in the art can be understood other advantages and effect of the present invention easily by the content disclosed by this specification.The present invention can also be carried out by the most different detailed description of the invention or apply, and the every details in this specification can also carry out various modification or change based on different viewpoints and application under the spirit without departing from the present invention.It should be noted that, in the case of not conflicting, the feature in following example and embodiment can be mutually combined.
It should be noted that, diagram provided in following example illustrates the basic conception of the present invention the most in a schematic way, component count, shape and size when only showing the assembly relevant with the present invention rather than implement according to reality in the most graphic are drawn, during its actual enforcement, the kenel of each assembly, quantity and ratio can be a kind of random change, and its assembly layout kenel is likely to increasingly complex.
Embodiment 1
A kind of reading plotter of mechanical counter, described reading plotter is for the reading of reading mechanical counter, described mechanical counter has multiple character wheel disk 1, this character wheel disk 1 is provided with 0～90 read text scale at interval of 36 degree, it is provided with four equally spaced notches 2 along its direction, center of circle in the middle of the sector that on described character wheel disk 1, each read text scale is corresponding, described reading plotter includes sending out/inspection light probe 4, send out/device for testing light part 8, point/splicer 11 and signal processor 9
Described luminescent device 7 connects luminescence probe 3 by beam splitter 10 is corresponding, described luminescence probe 3 is arranged at the side of described character wheel disk 1, described inspection light probe 4 is correspondingly arranged in this character wheel disk 1 opposite side, be suitable to make notch 2 transmit optical signal when character wheel disk 1 rotates, the optical signal of reception is sent to described device for testing light part 8 by described inspection light probe 4 by splicer 11, described device for testing light part 8 carries out opto-electronic conversion and processes the described signal processor 9 of connection, this signal processor 9 is according to the signal of telecommunication identification binary code receiving notch 2 correspondence, the read text scale being successively read character wheel disk 1 has combined the reading knowledge of mechanical counter.
In the present embodiment, described character wheel disk 1 is preferably four, it is possible to be five, six etc.；Described luminescence probe 3 is symmetricly set in character wheel disk 1 both sides with inspection light probe 4, when character wheel disk 1 is because of its work rotation counting, between notch 2 rotation extremely described luminescence probe 3 and inspection light probe 4 that read text scale is corresponding, because notch 2 part gets through hole, now, inspection light probe 4 receives the optical signal that luminescence probe 3 sends.
Refer to Fig. 1, for the structural representation of character wheel disk 1 of the mechanical counter of the present invention；The character wheel disk 1 of this enumerator is divided into 10 parts according to 36 degree of sectors, and every portion corresponds to a decimal scale read text scale, the most corresponding one-tenth numeral 0～9.
Refer to Fig. 2, for notch 2 structural representation of the mechanical counter character wheel disk 1 of the present invention；Four notches 2 corresponding to each read text scale are on four concentric circulars of this disk, and notch 2 is in the centre position of corresponding sector, the centrage of the most each sector is along its direction, center of circle, at four concentric circulars corresponding tetrad code of notch 2, wherein, from low to high, or correspondence can be carried out from a high position to low level.Described notch 2 be binary code corresponding to through hole state be " 1 ", this notch 2 i.e. breaks into cylindrical hole, it is allowed to optical signal passes through, described notch 2 be non through hole state correspondence binary code be " 0 ", not punching in the i.e. position of this correspondence, optical signal cannot pass through.
Specifically, the diameter of described notch 2 is the most identical, and the most corresponding character wheel disk both sides of its through hole are mutually perpendicular to, and facilitate optical signal level to pass through, decrease light loss；The diameter of this notch 2 is slightly larger than described inspection light probe 4 and the diameter of described luminescence probe 3, is suitable to transmit optical signal.
Specifically, described through-hole wall uniform fold has not extinction material, prevents optical signal from being absorbed and decay occurs, the sensitivity of impact inspection light.
Specifically, the binary code figure place that notch that on each described character wheel disk, read text scale is corresponding is corresponding is at least four, and this binary code at least two character codes compared with the binary code of its forward and backward same numerical digit are different, see below:
In notch, black circular hole is expressed as " 0 ", and in notch, white circular hole is expressed as " 1 ", according to notch, binary code and character one_to_one corresponding, is satisfied by uniqueness.
Specifically; by editing the notch 2 of character wheel disk 1; from 16 groups of tetrad codes, select 10 groups represent numeral 0～9; make often to organize tetrad code at least two character codes compared with the binary code of its forward and backward same numerical digit different; improve the anti-error ability of input tolerant for Chinese, it is ensured that the reliability of mechanical counter reading；Meanwhile, when encoding, the coding of four notches 2 to ensure at least two " 1 ", when it is less than two " 1 ", is then judged to fault, can check whether fault accordingly.
Refer to Fig. 3, be placed in the structured flowchart of character wheel disk for the optical fiber probe of the mechanical counter of the present invention；Specifically include:
Luminescence probe 3 relies on probe bracket 5 with inspection light probe 4 and is horizontally placed on character wheel disk 1 both sides, and its needle point is all directed at notch 2 center, the input of luminescence probe 3 connects the luminescent device 7 in signal processor 9, its outfan alignment notch 2 one end by beam splitter 10 and emitting optical fiber 6；Input alignment notch 2 other end of inspection light probe 4, its outfan connects device for testing light part 8 by optical fiber 6 and splicer 11, optical fiber 6 is preferably plastic optical fiber 6, when character wheel disk 1 work rotates the notch 2 to certain read text scale, and this notch 2 is positioned at luminescence probe 3 and is in straight line with inspection light probe 4, now, notch 2 in through hole state passes through optical signal, on the contrary, optical signal cannot be passed through, thus examine light device and convert optical signal into the signal of telecommunication, the corresponding binary code generating this character wheel disk 1.Detection by optical signal identifies the reading of character wheel disk 1, improves its reading efficiency.
Referring to Fig. 4, the optical fiber probe for the mechanical counter of the present invention is placed in another example structure block diagram of character wheel disk；Specifically include:
In the present embodiment, described character wheel disk both sides respectively set a shading baffle 12 being placed on notch and optical fiber probe, and wherein, this optical fiber probe is luminescence probe or receives light probe and match, as character wheel disk side sets luminescence probe, its opposite side must set matched receipts light probe.Described shading baffle 12 is the cylinder of interior hollow, make it just can cover notch and optical fiber probe, simultaneously, probe bracket 5 is positioned at character wheel disk both sides and the junction that is connected with optical fiber probe and is also housed in described shading baffle 12, the interference of ambient is prevented when optical fiber probe transmitting-receiving light source, thus avoid and misread phenomenon, improve its reading certainty.
Referring to Fig. 5, for the reading plotter structured flowchart of the mechanical counter of the present invention, details are as follows:
Signal processor 9 is according to controlling four luminous ports, control luminous port and be in the state of being turned on and off, when signal processor 9 needs the current count of certain character wheel disk 1 of reading mechanical counter, the luminous port making this character wheel disk 1 correspondence is in opening, now, luminescent device 7 sends the optical signal to beam splitter 10, optical signal is through luminescence probe 3, luminescence probe 3 exports optical signal, examine light probe 4 by corresponding notch 2 and receive this optical signal, described optical signal is detected by the tested optical device of splicer 11 8, device for testing light part 8 receives optical signal and is converted into corresponding electric signal " 1 ", device for testing light part 8 does not receives optical signal and is converted into corresponding electric signal " 0 "；Signal processor 9 is according to the read text scale binary code of this character wheel disk 1 correspondence of this signal of telecommunication identification, so that it is determined that the reading that this character wheel disk 1 is current.
Specifically, described signal processor 9 is according to being turned on and off of luminous port controlling each character wheel disk 1 correspondence one by one, obtain the reading of each character wheel disk 1 in a manner described, thus obtain the reading of mechanical counter, by controlling the switch of the luminous port of switching, realize the reading completing each character wheel disk 1 of Millisecond, significantly shorten the reading duration, improve reading efficiency, simultaneously, every side of each character wheel disk is equipped with shading baffle 12, to improve its reading certainty.
Send out/device for testing light part 8 is all located at outside enumerator, and has a safe distance from gas meter.Beam splitter 10, splicer 11, luminescence probe 3, inspection light probe 4 can be arranged in enumerator, can also be placed in outside enumerator, and beam splitter 10 quantity binary coding hole 2 quantity corresponding with each scale in character wheel disk 1 is identical, the quantity of splicer 11 is identical with character wheel disk 1 quantity in mechanical counter；Described luminescent device 7 is cold light source, when being used in gas meter, not only reduces optical fiber 6 and optical module usage amount by the way, it is thus also avoided that potential safety hazard, improves the safety of its application.
Embodiment 2
Refer to Fig. 6, for the reading flow chart of the mechanical counter of the present invention, including:
Step S501, the optical signal controlling to export character wheel disk side successively is opening；
Wherein, signal processor can control to export the optical signal of certain character wheel disk side successively from low to high or from a high position to low level is opening (by the switching of luminous port)；The optical signal of other character wheel disk correspondence input is closed mode.When certain code segment hole that character wheel disk read text scale is corresponding is through hole, it can pass and export corresponding optical signal from the through hole of this character wheel disk just.
Step S502, when the optical signal that and if only if described character wheel disk is corresponding is opening, detects the optical signal of described character wheel disk output；
Concrete, by the optical signal of some through hole of character wheel disk output described in inspection light probe identification, described optical signal is sent to device for testing light part.
Step S503, carries out opto-electronic conversion and obtains the binary code of described character wheel disk described optical signal, identifies that described binary code obtains the current reading of described character wheel disk；
Specifically, device for testing light part can be used to carry out opto-electronic conversion, export the corresponding signal of telecommunication.And identify that the signal of telecommunication carries out reading, and refer to Fig. 7, for the detail flowchart of number reading method step S503 in Fig. 5 of the present invention, details are as follows:
Step S601, whether the binary code that character wheel disk described in interpretation is corresponding is " 0 "；
Step S602, when the binary code that described character wheel disk is corresponding is " 0 ", then using its previous reading is current reading；Specifically, it is very fast that running software and electronics perform speed, even if each character wheel disk poll is complete in mechanical counter, the time cycle of reading, just for several milliseconds, therefore, after several polling cycles complete, can read the number of non-" 0 " entirely all the time.
Step S603, when the binary code that described character wheel disk is corresponding is not all " 0 " and includes at least two " 1 ", then reads the reading that this corresponding binary code of character wheel disk is corresponding；
Wherein, character wheel disk by, ten, hundred, thousand, or, thousand, hundred, ten, individual numerical digit be successively read each character wheel disk, the character wheel disk read text scale of reading is preserved.
Referring to Fig. 8, for the flow chart of reading step another state of S603 of the mechanical counter of the present invention, details are as follows:
Step S701, when the binary code that described character wheel disk is corresponding is not all " 0 " and during less than two " 1 ", it is judged that the binary code that character wheel disk is corresponding is not all " 0 " and whether the number of times that occurs less than two " 1 " exceedes predetermined threshold value；
Step S701, the binary code corresponding when character wheel disk is not all " 0 " and time the number of times that occurs less than two " 1 " exceedes predetermined threshold value, is then judged to fault, report and alarm；
Step S701, when the binary code corresponding when character wheel disk is not all " 0 " and the number of times that occurs less than two " 1 " not less than predetermined threshold value, then re-reads the reading of character wheel disk.
In mechanical counter reading process, the preferred number of times of predetermined threshold value is three times, by setting and the judgement of predetermined threshold value, described mechanical counter reading plotter whether fault can be differentiated from system, when described fault occurs, send alarm signal, notify corresponding staff's handling failure.
Step S504, reads the current reading of all character wheel disks, the reading of mechanical counter as described in number bit sequence combination producing.
Described character wheel disk is combined successively by reading order, a corresponding kilobit/hundred/ten/position, generate the reading of described mechanical counter.
In sum, the present invention uses each beam splitter correspondence to connect the luminescence probe of each character wheel disk, by the inspection light probe of corresponding for all character wheel disks same numerical digit output is connected to same splicer, use four beam splitters and four combiners respectively, thus decrease the usage quantity of optical fiber and optical module, save cost, optimize attachment structure；Meanwhile, the read text scale that described character wheel disk is corresponding is different binary code, and this binary code is different from the character code at least two of the same numerical digit of its forward and backward binary code, improves the anti-error ability of input tolerant for Chinese；The luminescent device used is cold light light source, when being used in gas meter, eliminates potential safety hazard；Control the switch of each luminous port by signal processor to switch over thus read the reading of corresponding character wheel disk, and the most luminous port of read text scale reading corresponding character wheel disk is in opening every time, remaining luminous port is closed mode, make it in the read text scale of each character wheel disk of Millisecond identification, shorten the reading duration of mechanical counter, improve the reading efficiency of mechanical counter.So, the present invention effectively overcomes various shortcoming of the prior art and has high industrial utilization.
The principle of above-described embodiment only illustrative present invention and effect thereof, not for limiting the present invention.Above-described embodiment all can be modified under the spirit and the scope of the present invention or change by any person skilled in the art.Therefore, art has all equivalence modification or changes that usually intellectual is completed under without departing from disclosed spirit and technological thought such as, must be contained by the claim of the present invention.
Claims (10)
1. the reading plotter of a mechanical counter, described reading plotter is for the reading of reading mechanical counter, described mechanical counter has multiple character wheel disk, this character wheel disk is provided with 0～90 read text scale at interval of 36 degree, it is characterized in that, be provided with four equally spaced notches along its direction, center of circle in the middle of the sector that on described character wheel disk, each read text scale is corresponding, described reading plotter includes sending out/inspection light probe, send out/device for testing light part, point/splicer and signal processor
Described luminescent device connects luminescence probe by beam splitter correspondence, described luminescence probe is arranged at the side of described character wheel disk, described inspection light probe is correspondingly arranged in this character wheel disk opposite side, be suitable to make notch transmit optical signal when character wheel disc rotary, the optical signal received is sent to described device for testing light part by described inspection light probe by splicer, described device for testing light part carries out opto-electronic conversion and processes the described signal processor of connection, the signal of telecommunication identification binary code that this signal processor is corresponding according to receiving notch, the read text scale being successively read character wheel disk has combined the reading knowledge of mechanical counter.
The reading plotter of mechanical counter the most according to claim 1, it is characterized in that, the binary code figure place that notch that on each described character wheel disk, read text scale is corresponding is corresponding is at least four, and this binary code at least two character codes compared with the binary code of its forward and backward same numerical digit are different.
The reading plotter of mechanical counter the most according to claim 1, it is characterised in that the diameter of described notch is the most identical, and its diameter is slightly larger than the diameter sending out/examine light probe.
The reading plotter of mechanical counter the most according to claim 1, it is characterised in that described notch be binary code corresponding to through hole state be " 1 ", described notch be binary code corresponding to non through hole state be " 0 ".
The reading plotter of mechanical counter the most according to claim 4, it is characterised in that the through hole that described notch is corresponding is cylindrical, and the both sides of the most corresponding character wheel disk of its through hole are mutually perpendicular to.
The reading plotter of mechanical counter the most according to claim 5, it is characterised in that described through-hole wall uniform fold has not extinction material.
The reading plotter of mechanical counter the most according to claim 1, it is characterized in that, described character wheel disk both sides respectively set a shading baffle being placed on notch and optical fiber probe, and the cylinder that described shading baffle is interior hollow so that it is just can cover notch and optical fiber probe.
8. the number reading method of a mechanically-based enumerator, it is characterised in that including:
The optical signal controlling to export character wheel disk side successively is opening；
When the optical signal that and if only if described character wheel disk is corresponding is opening, detect the optical signal of described character wheel disk output；
Described optical signal is carried out opto-electronic conversion and obtains the binary code of described character wheel disk, identify that described binary code obtains the current reading of described character wheel disk；
Read the current reading of all character wheel disks, the reading of mechanical counter as described in number bit sequence combination producing.
The number reading method of mechanically-based enumerator the most according to claim 8, it is characterised in that the binary code of this character wheel disk of described identification obtains the step of current reading, particularly as follows:
Whether the binary code that character wheel disk described in interpretation is corresponding is " 0 "；
When the binary code that described character wheel disk is corresponding is " 0 ", then use its previous reading as current count value；
When the binary code that described character wheel disk is corresponding is not all " 0 " and includes at least two " 1 ", then read the reading that this character wheel corresponding binary code of disk current scale is corresponding.
The number reading method of mechanically-based enumerator the most according to claim 9, it is characterised in that when the described binary code corresponding when described character wheel disk is not all " 0 " and includes at least two " 1 ", also include:
When the binary code that described character wheel disk is corresponding is not all " 0 " and during less than two " 1 ", it is judged that the binary code that character wheel disk is corresponding is not all " 0 " and whether the number of times that occurs less than two " 1 " exceedes predetermined threshold value value；
The binary code corresponding when character wheel disk is not all " 0 " and time the number of times that occurs less than two " 1 " exceedes predetermined threshold value,
Then it is judged to break down；
When the binary code corresponding when character wheel disk is not all " 0 " and the number of times that occurs less than two " 1 " not less than predetermined threshold value, then re-read the reading of character wheel disk current scale.
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| CN107631775A (en) * | 2017-11-06 | 2018-01-26 | 陕西银河电力仪表股份有限公司 | System is implemented in a kind of new water meter mechanical character wheel direct-reading |
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| CN105823495B (en) | 2018-10-02 |
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