CN2844852Y - Optical fiber device for reading out data from mechanical counter directly - Google Patents

Abstract

The utility model relates to an optical fiber device for reading out data from a mechanical counter directly, which is widely suitable for reading indicated values of various mechanical counter meters of remote meter reading. The wheel circumference surface of each valid reading bit character wheel of a mechanical counter is printed with a tetrad coding color code which is corresponding to a visual digital of a reading window in the equivalence way. Color code bar codes are read and identified by a fiber optic probe and a signal processor to directly obtain tetrad codes of the character wheel digital, and then the tetrad codes are remotely transmitted by a data communication port to complete the reading and the identification of the character wheel digital. In order to prevent the digital misreading while in the carry momemt of the character wheel, a misreading proof numeral wheel and a matched misreading proof colour code and a misreading proof probe thereof are specially arranged, and however, the structure is simple and the misreading proof effect is good. The utility model is not provided with a special coding sheet, makes tiny change on the original meter and has simple manufacture and high reliability. A circuit is not led into the meter, therefore the meter is safe and the has the explosion protection function. A plug-in type fiber optic probe support and the external signal processor are convenient for site operation and maintenance.

Description

The device of the direct reading mechanical counter number of optical fiber type

(1) technical field: the utility model relates to the reading device of mechanical counter numeral indicating value, relates in particular to the reading device of the digital indicating value of the table tool that has mechanical counter in the long-distance meter-reading system.

(2) background technology: application number is the device that 02241835.0 Chinese patent application discloses the direct reading mechanical counter number of a kind of photo-electric, it comprises the counter character wheel, the tetrad coded slice, sensor board, the digital signal processing circuit plate, it is characterized in that a side device code sheet at the counter character wheel, both rotate synchronously, encoding strip on the coded slice be installed on counter-support on sensor board on 4 reflection-type infrared tubes corresponding, the geometric position of numeral on the counter character wheel is transformed into the tetrad coded signal, the digital signal processing circuit plate is deciphered and conversion process this coded signal, and, realize the function of remote meter reading by bus communication mode remote transmission and demonstration.There is following shortcoming in the reading device of above-mentioned mechanical counter numeral: one, the position reading out device of being made up of coded slice and sensor board is installed in the slit between the mechanical counter character wheel, structural modification to former table tool is bigger, make and installation accuracy requirement height, the cost of manufacture height, yield rate is low; Its two, in case coded slice and sensor board break down in the application, need and the table tool is dismantled together, maintainable poor; Its three, the feed circuit line of sensor board is introduced in the mechanical counter, using in the table tool of explosion-proof performance is arranged to increase blast resistance construction, makes structure become more complicated.

(3) utility model content: the utility model is for improving above-mentioned shortcoming, the device of the direct reading mechanical counter number of a kind of optical fiber type is provided, and it not only has non-contacting advantage, and does not change the structure of former mechanical counter substantially, installation accuracy requires low, and is maintainable good.Feed circuit are not introduced in the mechanical counter, reach electricity and isolate safety anti-explosive.

The technical solution of the utility model is as follows:

The utility model comprises mechanical counter, optical-fiber probe sensor, signal processor, wherein optical-fiber probe sensor comprises optical fiber probe assembly that is made of paired emission light incident optical probe and reflected light reception optical fiber probe and the conversion member that the mark on the mechanical counter character wheel wheel side face is transformed to binary numeral, optical transmitting set and optical receiver in the corresponding described signal processor of one end difference of optical fiber probe assembly, the other end is the conversion member of corresponding described binary numeral respectively, the conversion member that it is characterized in that described binary numeral is made up of the conversion colour code that is attached to the binary numeral on the mechanical counter character wheel wheel side face, the light modulated of the optical transmitting set emission in the signal processor arrives described conversion colour code by the emission light incident optical probe in the optical fiber probe assembly, reflected light through changing colour code is by the optical receiver in the reception of the reflected light in the optical fiber probe assembly optical fiber probe return signal processor, signal processor is handled the reflected light that receives, mark on the mechanical counter character wheel is directly read into the binary number coded signal, and described binary number coded signal is transmitted by the data communication mouth.

For the valid reading position character wheel of mechanical counter, the conversion member of described binary numeral is made up of the tetrad coding colour code that is attached on the character wheel wheel side face of mechanical counter valid reading position, the digital correspondence of diverse location shown on the described character wheel is provided with different described coding colour codes, the light modulated of the optical transmitting set emission in the signal processor arrives described coding colour code by the emission light incident optical probe in the optical fiber probe assembly, receive optical receiver in the optical fiber probe return signal processor by the reflected light in the optical fiber probe assembly through described coding colors target reflected light, signal processor is handled the reflected light that receives, numeral on the mechanical counter character wheel is directly read into the coded signal of tetrad, and described tetrad coded signal is transmitted by the data communication mouth; The background color colour code of the numeral of wheel side face and wheel side face is respectively white (or yellow) look word and red background color colour code, perhaps red word and white (or yellow) look background color colour code.

The above tetrad coding colors mark is between the numeral of wheel side face.It is with white (or red, yellow) look rectangular that described tetrad coding colors is designated as black, and the bar length direction is along the sense of rotation of character wheel.

Misread numeral for preventing character wheel constantly in carry, the next bit character wheel of mechanical counter valid reading lowest order character wheel is set to anti-error reading wheel, on the wheel side face of anti-error reading wheel, anti-error reading black colour code is set in the corresponding numeral of optical fiber probe 2 shared intervals, in carry constantly, when turning to corresponding optical fiber probe assembly with anti-error reading wheel between this color scale space, the binary code that signal processor reads thereon is " 0 ", and signal processor stops to read the indicating value on the character wheel of counter valid reading position and is deferred to the follow-up number of resuming studies of valid reading position character wheel carry status end; Interval on the wheel side face of anti-error reading wheel outside described anti-error reading black colour code, the background color colour code of the numeral of wheel side face and wheel side face is set to white (or yellow) look word and red background color colour code respectively, perhaps red word and white (or yellow) look background color colour code, when turning to corresponding optical fiber probe assembly with anti-error reading wheel between this color scale space, the binary code that signal processor reads thereon is " 1 ", and signal processor is to the readout on the character wheel of mechanical counter multidigit valid reading position.

For make prevent to misread more reliable, adopt a kind of anti-error reading compensation process, when the mechanical counter valid reading position character wheel carry moment, digital color scale space on the character wheel wheel side face of the corresponding valid reading of its corresponding optical fiber probe assembly position outside the coding colour code, every weights sum of the tetrad sign indicating number that signal processor reads thereon surpasses decimal number 9, signal processor is cast out this time reading, finishes the follow-up number of resuming studies to valid reading position character wheel carry status.

One end device of above-mentioned optical fiber probe assembly is in box body formula optical fiber probe support, the termination of probe is corresponding with binary numeral colour code on the mechanical counter character wheel, box body formula optical fiber probe support is positioned at the bottom (or top) of mechanical counter character wheel, inserts in the socket of mechanical counter shell; The other end of optical fiber probe assembly is installed in the electric-controlled box, be installed on electric-controlled box in signal processor in optical transmitting set and optical receiver corresponding, the fibre bundle device between optical fiber probe support and the electric-controlled box has sheath.

The emission light incident optical probe and the reflected light that are installed on the optical fiber probe assembly in the optical fiber probe support receive the upper and lower paired arrangement of optical fiber probe, the angle of both fibre cores is less than 30 degree, corresponding to every valid reading position of mechanical counter character wheel four pairs of optical fiber probes are installed, corresponding described misread preventing digit wheel is installed a pair of optical fiber probe.

Optical transmitting set in the signal processor and optical receiver adopt the grouping sharing structure: the tetrad coding colour code on the character wheel of the same valid reading of mechanical counter position is respectively by the shared optical transmitting set of emission light incident optical probe, and the identical weights sign indicating number colour code in the tetrad coding colour code on the character wheel of different valid readings position receives the shared optical receiver of optical fiber probe by reflected light.

The utility model is printed the conversion colour code bar of binary numeral on the character wheel wheel side face of mechanical counter, read to know these colour code bar codes by plastic optical fiber probe assembly and signal processor, directly obtain the tetrad sign indicating number of wheel digital, and carry out teletransmission by the data communication mouth, finish wheel digital read know.From technique scheme, remarkable technique effect of the present utility model is:

1. former table tool is not established special code wheel, just on former counter character wheel wheel side face, print the colour code bar, simple in structure, change minimumly, be easy to making, the reliability height, the yield rate height, cost is low.

2. no circuit is introduced in the counter box, only the optical fiber probe support is inserted in the counter box, and signal processor is loaded on outside the counter box, and the realization electricity is isolated safety anti-explosive.

3. adopt and the bar coding colour code is set, can reduce the accuracy requirement of installation along the character wheel rotation direction.

4. adopt anti-error reading wheel and valid reading position colour code to encode technical scheme that the weights sum differentiates, not only simple in structure, to be easy to making, reliability height, cost low, and also anti-error reading is effective.

5. optical fiber probe support insertable is on-the-spot in the utility model installs, and mounting or dismounting and construction are extremely convenient, the reliability height.

6. maintainable good: the active device of all rapid wears all places signal processor in the utility model, signal processor is installed in the outer electric-controlled box of table tool, need not dismantle the table tool when maintenance or replacing, as long as from table tool mechanical counter box drawn optical fiber probe support, convenient and practical, and maintenance does not influence the operation of table tool.

7. optical fiber long service life.

8. anti-electromagnetism and ambient light are disturbed, and on-the-spot plug and play need not to adjust.

The utility model institute's reading numerical values and mechanical counter visual windows indicating value are identical.In the time outside the character wheel generation carry, can carry out reading at any time, not need not power supply during reading.The utility model is applicable to all long-range wired or wireless checking meter or the reading of mechanical counter table tool indicating value that IC-card is checked meter.

(4) description of drawings:

Fig. 1 is the three-dimensional structure diagram (wherein the mechanical counter lid is dismantled) of the utility model device;

Fig. 2 is the synoptic diagram (right side is looked) of the utility model apparatus structure;

Fig. 3 is the stretch-out view of mechanical counter valid reading position character wheel and misread preventing digit wheel in the table tool of the present utility model;

Fig. 4 is the end view drawing of the utility model middle probe support;

Fig. 5 is the cut-away view of the utility model middle probe support;

Fig. 6 reads the fundamental diagram of numeral and anti-error reading for the utility model;

Fig. 7 is the principle of work block scheme of signal processing circuit when reading numeral in the utility model;

Fig. 8 is the principle of work block scheme of signal processing circuit during anti-error reading in the utility model;

Fig. 9 is that visual reading of valid reading position character wheel and probe are read knowledge value contrast synoptic diagram;

The contrast stretch-out view of tetrad colour code coding read value (decimal system) that Figure 10 is the visual reading of valid reading position character wheel---colour code and colour code coding---;

Figure 11 is a synoptic diagram between anti-error reading color scale space on the misread preventing digit wheel;

The contrast stretch-out view of Figure 12 is a misread preventing digit wheel numeral---anti-error reading colour code---colour code read value (scale-of-two code value).

(5) embodiment:

See Fig. 1, Fig. 2, the utility model comprises mechanical counter 1, optical fiber probe support 4, signal processor 6, and installing multidigit character wheel 2,5 in the counter 1 in rotating shaft 8 is the protecting pipe of fibre bundle.See Fig. 2, Fig. 4, Fig. 7, install in the optical fiber probe support 4 by emission light incident optical probe 9 and reflected light and receive the optical fiber probe assembly that optical fiber probe 10 constitutes in pairs; See Fig. 2, Fig. 7, the corresponding respectively conversion member that is arranged in the binary numeral on mechanical counter 1 character wheel 2 of optical transmitting set 21 and optical receiver 22 in the end respective signal processor 6 of optical fiber probe assembly, the other end.Above-mentioned optical fiber probe assembly and conversion member constitute optical-fiber probe sensor.

See Fig. 1, Fig. 3, in the utility model, for the character wheel of mechanical counter valid reading position, described conversion member is made up of the tetrad sign indicating number coding colour code 3 that is printed on the character wheel wheel side face of valid reading position, and the most preferred embodiment of coding colour code 3 adopts 8421 yards of tetrad sign indicating number.Can certainly adopt other codes of tetrad.Coding colour code 3 between each numeral of wheel side face, on the character wheel 2 shown in the digital correspondence of diverse location different coding colour codes 3 is set.See Fig. 2 and Fig. 9, optical fiber probe support 4 of the present utility model is positioned at the bottom of character wheel 2, human visual reading window Y is in the positive front of character wheel 2, though both geometric positions differ an angle of 90 degrees degree, but by the coding colour code 3 that optical fiber probe assembly and 6 pairs of signal processors are positioned at the character wheel bottom read numerical value equivalent and corresponding with the viewable numbers value of artificial reading window, viewable numbers value on the expression character wheel 2 in Fig. 9 circle, coding colour code bar 3 is arranged between two numerals, separator bar in the circle illustrates the distribution situation in each digital block and colour code bar district, reads knowledge value (decimal system) for probe outside Fig. 9 circle.The utility model embodiment adopts red square-wave frequency modulation light source, and coding colour code 3 is that black is rectangular with white (or red, yellow), makes between each colour code bar code reflection to red light is had big contrast.Coding colour code bar is transversely arranged, and bar length is along the sense of rotation of character wheel 2.When optical fiber probe points to coding colour code 3, corresponding white (or red, yellow) bar code, signal processor 6 is read the tetrad code value and is " 1 ", and corresponding black bar code reads as " 0 ".For the zone outside the coding colour code, for example mechanical counter digit wheel 2 is taken turns the numeral and the background color of side face, be printed to red light is had white (or yellow) look word and the red background color colour code that reaches bigger visual contrast (so that the direct reading of visual windows) than strong reflection, or red word and white (or yellow) look background color colour code, it all is " 1 " that optical fiber probe and signal processor 6 are read it, and this zone is called digital color scale space.The contrast stretch-out view of tetrad colour code coding read value (decimal system) is seen Figure 10 to the visual reading of its valid reading position character wheel---colour code and colour code coding---, and Figure 10 launches along Fig. 9 A-A place.From Fig. 9 and Figure 10 as can be seen, when the indicating value that reads character wheel 2 as the visual windows Y from the positive front of mechanical counter is 9, the corresponding character wheel of optical fiber probe assembly position differs an angle of 90 degrees degree, should aim at the colour code encoding strip 3 of character wheel lower number, read the tetrad sign indicating number be 1001, its every weights and (decimal system) are 9, and is identical with the visual windows indicating value.Along with the rotation of character wheel, the optical fiber probe assembly to other digital colour code encoding strips of character wheel read numerical value also corresponding one by one with the visual windows indicating value.So make the digit wheel 2 of mechanical counter 1 become the light reflection code that has the colour code 3 of encoding and read to know wheel, it is with optical fiber probe assembly and signal processor 6, realizes that the mechanical counter indicating value is to the conversion of tetrad sign indicating number and read knowledge.Utilizing the digital indicating value of colour code coding, optical-fiber probe sensor and signal processor 6 direct reading mechanical counters 1, is the outstanding substantive distinguishing features that the utlity model has.

The utility model is to be operated in the stepping carry status based on mechanical counter character wheel 2, and its position relative fixed when not-carry makes and might utilize said method and device to read wheel digital.But when mechanical counter character wheel 2 was in carry status, optical fiber probe just can not be aimed at coding colour code 3, can misread several phenomenons.The carry each time of mechanical counter all is to occur in next bit to forward 9～0 position to, drives a carry.And misread all be the visual reading of the next bit character wheel of the least significant bit (LSB) character wheel that needs reading from 9 to 0 stepping rotate during, therefore, for preventing to misread number, as most preferred embodiment, see Fig. 3, the next bit character wheel 11 (as tenths) of mechanical counter 1 valid reading lowest order character wheel (as individual position) is set to anti-error reading wheel.See Figure 11, Figure 12, numeral is a viewable numbers on the misread preventing digit wheel in Figure 11 circle, and Figure 12 launches along Figure 11 B-B place, and 12 is the misread preventing colour code among the figure.On the wheel side face of anti-error reading wheel in optical fiber probe corresponding to the interval of numeral 2 (corresponding to the reading window within the interval of viewable numbers 9 to 0 on the anti-error reading wheel wheel side face), the weak anti-error reading colour code 12 of catoptrical black is set, at this moment, anti-error reading wheel 11 is in carry constantly, cause a position, ten, hundred are waited the one or more carry status that also are in the valid reading wheel, when colour code 12 turns to corresponding anti-error reading optical fiber probe assembly with anti-error reading wheel, the binary code that anti-error reading optical fiber probe assembly and signal processor 6 read on colour code 12 is " 0 ", signal processor 6 is by microprocessor control interlock circuit, stop to read the indicating value on the character wheel of counter valid reading position, and be deferred to valid reading position carry status and finish, signal processor 6 reads the scale-of-two code value when " 1 " by misread preventing optical fiber probe assembly outside colour code 12, again the numeral of reading mechanical counter significance bit character wheel.Interval on the wheel side face of anti-error reading wheel 11 outside above-mentioned anti-error reading black colour code 12, it is the interval outside the corresponding numeral 2 of optical fiber probe, the background color colour code of the numeral of wheel side face and wheel side face is set to white (or yellow) look word and red background color colour code respectively, perhaps red word and white (or yellow) look background color colour code, be all the emergency light reflex colour code, when turning to corresponding anti-error reading optical fiber probe assembly with anti-error reading wheel 11 between this color scale space, the scale-of-two code value that signal processor 6 reads on this interval colour code is " 1 ".Each reading, signal processor 6 at first read the signal of anti-error reading wheel 11, as long as the signal that reads is " 1 ", optical- fiber probe sensor 9,10 and signal processor 6 are promptly to the readout on each valid reading position character wheel 2 of mechanical counter.As seen from above-mentioned, in the utility model, for anti-error reading wheel, described conversion member is to be made of the binary code colour code 12 that is printed on the anti-error reading wheel 11.

Prevent to misread number more accurately reliably for making, take second kind of method of replenishing anti-error reading simultaneously:

See Fig. 3 and Fig. 7, mechanical counter valid reading position character wheel carry constantly, digital color scale space on the character wheel wheel side face of the corresponding valid reading of optical fiber probe assembly position outside the coding colour code, promptly white (or yellow) the red end of word or The Scarlet Letter white (or yellow) background color color scale space, 6 pairs of one or more character wheels of signal processor carry out reading, the numeral that every code weight value sum in the tetrad sign indicating number that reads is surpassed decimal number 9, by microprocessor control interlock circuit, this reading is all cast out, wait for that significance bit character wheel carry status finishes, the optical fiber probe assembly carries out reading behind the coding colour code on the aligned wheels side face again again.Described method for processing signals and circuit utilize prior art.

The structure of above-mentioned two kinds of anti-error readings and method all are the principle of work of utilizing colour code, the detection of anti-error reading optical fiber probe and signal processor to read to know, and be reliable simply again, also is the outstanding substantive distinguishing features of the utility model.

See Fig. 1, Fig. 2, Fig. 5, Fig. 6, an end device of optical fiber probe assembly is in box body formula optical fiber probe support 4 in the utility model, probe support 4 inserts in the socket of mechanical counter shell 7 bottoms (also can be arranged at top), tetrad coding colour code and scale-of-two misread preventing colour code on the termination of probe and the mechanical counter character wheel are corresponding, the other end of optical fiber probe assembly is installed in the electric-controlled box, see Fig. 6, Fig. 7, corresponding with optical transmitting set 21 and optical receiver 22 in the signal processor 6 that installs in the electric-controlled box, see Fig. 4, Fig. 7, in optical fiber probe support 4, on incident optical probe 9 and the mirror based fiber optica probe 10, arrange in pairs down, the angle of both position, termination fibre cores is less than 30 degree, and can adopt diameter is 0.25～0.5 millimeter plastic optical fiber.Addressing before the excellent technique effect of the architectural feature of above-mentioned plug-in probe support 4 and external signal processor 6, also is the outstanding substantive distinguishing features of the utility model.

See Fig. 6, the orientation of the relative position of mechanical counter character wheel and probe support and character wheel is opposite with Fig. 2, Fig. 5 on its drawing, get mechanical counter 1 valid reading position character wheel 2 and be five character wheels (ten thousand, thousand, hundred, ten and individual position), tenths character wheel 11 is anti-error reading wheel among the figure, and 12 is the anti-error reading colour code on it.See Fig. 3, Fig. 6, coding colour code 3 most preferred embodiments adopt 8421 yards of tetrad, every valid reading position character wheel 2 needs 4 pairs respectively and reads to know optical fiber probe, respectively corresponding four colour codes, promptly respectively corresponding tetrad, five character wheels have 20 pairs and read to know optical fiber probe, and misread preventing digit wheel 11 is installed a pair of anti-error reading optical fiber probe 13,14 in addition.One end of 21 pairs of optical fiber probes passes from the end face of optical fiber probe support 4, as Fig. 4, Fig. 5, shown in Figure 6.See Fig. 6, four colour codes 3 on each character wheel 2 respectively have a pair of optical fiber probe 9 and 10 correspondences respectively, anti-error reading optical fiber probe 13 and 14 corresponding with anti-error reading colour code 12.Each is corresponding with optical transmitting set 21 and optical receiver 22 in the signal processor 6 respectively to the other end of probe 9 and 10, adopt the grouping sharing structure: as can be seen from Fig. 6, four tetrad sign indicating number colour codes 3 of same valid reading position character wheel are respectively by the shared same optical transmitting set of emission light incident optical probe, this optical transmitting set is a light emitting diode, so has five optical transmitting sets 21; The shared optical receiver of identical weights sign indicating number colour code in the tetrad coding colour code of different valid readings position character wheel so has four optical receivers 22, and corresponding five reflected light of each optical receiver receive optical fiber.Optical transmitting set 21 and optical receiver 22 are by the photo-coupler 15 in emission light incident optical and reflected light reception optical fiber pie graph 6 signal processors 6, and the parts of all the other coded representations are identical with Fig. 1, Fig. 2 among Fig. 6.

See Fig. 6, Fig. 7, signal processor 6 produces light emission signal and light receiving signal is handled.Light emission signal generates square-wave signal by phaselocked loop 17, through phase-adjusting circuit 18, selection contactor 19, light signal driving circuit 20, enter optical transmitting set 21, send modulated red light wave by optical transmitting set 21 (as red light emitting diodes) through emission light incident optical probe 9, arrive the coding colour code 3 of each character wheel; Optical signal receiver adopts (red) light activated optical receiver 22, receive the light signal of reflection on the optical fiber probe 10 received code colour codes 3 by reflected light, then by stablizing amplifying circuit 23, selecting contactor 24, directly add to phaselocked loop 17, read out the tetrad sign indicating number of coding colour code 3.The instruction of host computer and read signal data by microprocessor 25 control, finish transmission by data communication mouth 16.Microprocessor 25 control selector switch 19,24 among Fig. 7 and phaselocked loop 17, data communication mouth 16.

See Fig. 6, Fig. 8, survey the information that anti-error reading is taken turns misread preventing colour code 12 on 11 to 13,14, read the binary code of misread preventing colour code 12 through signal processor 6 by anti-error reading probe.Fig. 8 Fig. 7 is same signal processor 6.Its circuit structure and optical transmitting set 21, optical receiver 22 all adopt prior art design and making.

Claims (8)

1. the device of the direct reading mechanical counter number of optical fiber type, comprise mechanical counter, optical-fiber probe sensor, signal processor, wherein optical-fiber probe sensor comprises optical fiber probe assembly that is made of paired emission light incident optical probe and reflected light reception optical fiber probe and the conversion member that the mark on the mechanical counter character wheel wheel side face is transformed to binary numeral, optical transmitting set and optical receiver in the corresponding described signal processor of one end difference of optical fiber probe assembly, the other end is the conversion member of corresponding described binary numeral respectively, the conversion member that it is characterized in that described binary numeral is made up of the conversion colour code that is attached to the binary numeral on the mechanical counter character wheel wheel side face, the light modulated of the optical transmitting set emission in the signal processor arrives described conversion colour code by the emission light incident optical probe in the optical fiber probe assembly, reflected light through changing colour code is by the optical receiver in the reception of the reflected light in the optical fiber probe assembly optical fiber probe return signal processor, signal processor is handled the reflected light that receives, mark on the mechanical counter character wheel is directly read into the binary number coded signal, and described binary number coded signal is transmitted by the data communication mouth.

2. press the device of the direct reading mechanical counter number of the described optical fiber type of claim 1, the conversion member that it is characterized in that described binary numeral is made up of the tetrad coding colour code that is attached on the character wheel wheel side face of mechanical counter valid reading position, the digital correspondence of diverse location shown on the described character wheel is provided with different described coding colour codes, the light modulated of the optical transmitting set emission in the signal processor arrives described coding colour code by the emission light incident optical probe in the optical fiber probe assembly, receive optical receiver in the optical fiber probe return signal processor by the reflected light in the optical fiber probe assembly through described coding colors target reflected light, signal processor is handled the reflected light that receives, numeral on the mechanical counter character wheel is directly read into the tetrad coded signal, and described tetrad coded signal is transmitted by the data communication mouth; The background color colour code of the numeral of wheel side face and wheel side face is respectively white or yellow word and red background color colour code, perhaps red word and white or yellow background color colour code.

3. by the device of the direct reading mechanical counter number of the described optical fiber type of claim 2, it is characterized in that described tetrad coding colors mark is between the numeral of wheel side face.

4. by the device of claim 2 or the direct reading mechanical counter number of 3 described optical fiber types, it is characterized in that described tetrad coding colors is designated as black and white or red, yellow rectangular, the bar length direction is along the sense of rotation of character wheel.

5. by the device of the direct reading mechanical counter number of the described optical fiber type of claim 1, it is characterized in that:

(1) the next bit character wheel of mechanical counter valid reading lowest order character wheel is set to anti-error reading wheel, on the wheel side face of anti-error reading wheel in the interval of the corresponding numeral 2 of optical fiber probe, anti-error reading black colour code is set, in carry constantly, when turning to corresponding optical fiber probe assembly with anti-error reading wheel between this color scale space, the binary code that signal processor reads thereon is " 0 ", and signal processor stops to read the indicating value on the character wheel of counter valid reading position and is deferred to the follow-up number of resuming studies of valid reading position character wheel carry status end; Interval on the wheel side face of anti-error reading wheel outside described anti-error reading black colour code, the background color colour code of the numeral of wheel side face and wheel side face is set to white or yellow word and red background color colour code respectively, perhaps red word and white or yellow background color colour code, when turning to corresponding optical fiber probe assembly with anti-error reading wheel between this color scale space, the binary code that signal processor reads thereon is " 1 ", and signal processor is to the readout on the character wheel of mechanical counter multidigit valid reading position;

(2) when the mechanical counter valid reading position character wheel carry moment, digital color scale space on the character wheel wheel side face of the corresponding valid reading of its corresponding optical fiber probe assembly position outside the coding colour code, every weights sum of the tetrad sign indicating number that signal processor reads thereon surpasses decimal number 9, signal processor is cast out this time reading, finishes the follow-up number of resuming studies to valid reading position character wheel carry status.

6. press the device of the direct reading mechanical counter number of the described optical fiber type of claim 1, an end device that it is characterized in that described optical fiber probe assembly is in box body formula optical fiber probe support, the termination of probe is corresponding with binary numeral colour code on the mechanical counter character wheel, box body formula optical fiber probe support is positioned at the bottom or the top of mechanical counter character wheel, inserts in the socket of mechanical counter shell; The other end of optical fiber probe assembly is installed in the electric-controlled box, be installed on electric-controlled box in signal processor in optical transmitting set and optical receiver corresponding, the fibre bundle device between optical fiber probe support and the electric-controlled box has sheath.

7. press the device of claim 2, the direct reading mechanical counter number of 5 or 6 described optical fiber types, the emission light incident optical probe and the reflected light that it is characterized in that being installed on the optical fiber probe assembly in the optical fiber probe support receive the upper and lower paired arrangement of optical fiber probe, the angle of both fibre cores is less than 30 degree, corresponding to every valid reading position of mechanical counter character wheel four pairs of optical fiber probes are installed, corresponding described misread preventing digit wheel is installed a pair of optical fiber probe.

8. press the device of the direct reading mechanical counter number of the described optical fiber type of claim 2, it is characterized in that optical transmitting set and optical receiver in the signal processor adopt the grouping sharing structure: the tetrad coding colour code on the character wheel of the same valid reading of mechanical counter position is respectively by the shared optical transmitting set of emission light incident optical probe, and the identical weights sign indicating number colour code in the tetrad coding colour code on the character wheel of different valid readings position receives the shared optical receiver of optical fiber probe by reflected light.

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