CN2490654Y - Radix decimal machinery counter display value anti-misreading modular switch intermediary code and conversion device - Google Patents

Abstract

The utility model relates to a radix decimal machinery counter display value anti-misreading modular switch intermediary code and conversion device, which aims to converse the machinery counter print wheel display value into equivalent binary or decimal electronic digital output code. The utility model solves the problem that: when a working instrument adopting a machinery counter to accumulate metering values uses pulse output for far transmission of data, the transmission process is easy to be interfered and the inconformity of accumulated metering values between a field instrument and a long-distance meter reader is then caused. The utility model provides the machinery counter display value anti-misreading modular conversion technology and has the advantages that the conversion device is interference-free; no misreading phenomenon occurs when the machinery counter is under the state of continuous rotary counting; and the conversion error is guaranteed smaller than a figure on the last print wheel of the counter. The utility model is adequate for top-down real-time data inquiry of a computer control system on the field instrument.

Description

Multidigit decimal mechanical counter displayed value misread preventing analog to digital conversion media code and conversion equipment

The present invention relates to a kind of multidigit decade mechanical counter displayed value misread preventing media code and conversion equipment, purpose is that the character wheel displayed value is converted to the BCD output electron number character code equivalent with it.

Background technology of the present invention: employing decade mechanical counters such as the electric energy meter in actual at present use the, water meter, gas meter are made the instrument of cummulative metering value, normal use pulse to export to carry out data remote, but be subject to disturb the metering accumulated value that causes between field instrument and the long-range meter reading device inconsistent because of pulse signal.For avoiding this kind phenomenon to take place, inquire about with a teletransmission or a distant place but need a kind of displayed value directly to carry out analog-to-digital method with mechanical counter.If the physical object that is converted in analog-digital conversion process can not directly be accepted by sensor institute, generally all need to introduce intermediary's physical quantity, be about to physical object and at first be converted to signals such as the light that can be experienced by sensor, electricity, reusable sensor identification then.And, often adopt the logic state coding techniques in the above-mentioned conversion along with the development of digital technology, to reduce the transformed error of being introduced in the transfer process.With the mechanical wires displacement, when angular displacement is converted to electronic digital coding, the general electron number character code output that analog quantity directly is not converted to equivalence, but adopt the media code that analog quantity at first is converted to a kind of logic state, then this media code is translated into the scale-of-two output code that can be accepted by computing machine or other digital circuits with electronic digital circuit.Why directly conversion and will adopt media code is because sensor can't accurately be discerned the digitizing status signal that is in two state encoding intersections, and often in the make a mistake situation of read state signal of intersection.Be example for example with four sensors:

Intersection just may read 16 codings of from " 0000 " to " 1111 " any one.Therefore, if do not prevent the measure of misreading, do not use media code or adopt the switch technology that can not prevent the media code misread all to be considered to not have practical value at adjacent two kinds of state intersections.The present invention designs and is used for an analog-to-digital cover media code scheme and the conversion method of mechanical counter displayed value, media code is a character string of forming with the two kinds of status words in " 0 " " 1 ", be characterized in that adjacent two sign indicating numbers only have a character opposite states that is in same position, example: the sign indicating number that one of them of " 0000 " is adjacent is " 0001 ".Which no matter sensor can both be judged to one of these two adjacent codes with these two adjacent different character recognition for.Use this cover media code scheme and conversion method that multidigit mechanical counter display digit is carried out analog to digital conversion and when carry takes place, will guarantee that also transformed error is no more than a numeral of last digit character wheel.

Content of the present invention: the one, solve the following problems that background technology exists: at first be because employing mechanical counters such as electric energy meter, water meter, gas meter are made the instrument of cummulative metering value, normal use pulse is exported and is carried out data remote, but pulse signal is subject to disturb and cause the variable accumulated value between field instrument and the long-range meter reading device inconsistent; Next is to adopt above-mentioned pulse signal or adopt the product that can not prevent the direct modulus conversion technique misread, can not adapt to the job requirement of data in real time inquiry from top to bottom; The 3rd is because of being subject to disturb or being in some state or easily misreading when rotating continuously at counter, and conversion accuracy can not guarantee.The 2nd, design one cover media code scheme guarantees the intersections at adjacent two yards sign bands, and the signal that sensor read must be one of adjacent two yards, and can not be other sign indicating numbers.The 3rd, design one cover analog to digital conversion method makes when mechanical counter is in normal state and carry status analog to digital conversion that the difference of electronics output code and mechanical counter displayed value is no more than a word of position, end character wheel; A plurality of sensors share a sign band makes simple in structure being easy to of mechanical register analog-digital commutator make.The core of technical scheme of the present invention is the analog-to-digital media code of decimal system mechanical counter displayed value misread preventing, and with to adopt which kind of principle to carry out transformational relation little; Media code technical scheme provided by the present invention is applicable to the analog-digital commutator based on the use sensor identification mechanical quantity status signal of any principle.Sensor is to use non electrical quantities such as photoelectricity (comprising printing opacity, reflective and refractive power etc.) electromagnetism, magnetoelectricity, induction, inductance, electric capacity, resistance and Hall effect all to can be used to make it to prevent to misread in the electric weight transfer process.1. the design proposal of media code: this media code is arranged in the form of a ring, is divided into definitions and blocks sign indicating number, and the demonstration numerical value of the corresponding character wheel of definitions produces the output code equivalent with it, blocks sign indicating number and produces an obstruction or a synchronizing signal of discerning for follow-up electronic circuit.The definitions character number used with blocking character string that sign indicating number all is " 0 " and " 1 " two status words formations and each yard is identical, has only a character opposite states that is in same position between adjacent two yards, the group code that the present invention will have feature like this is called the ring-type media code, be its head and the tail two yards also by adjacent two yards requirements, also have only a character opposite states that is in same position.Each definitions is only corresponding with certain display digit of character wheel, and that each display digit allows a plurality of definitions is corresponding, and blocking sign indicating number must be the sign indicating number different with definitions, the obstruction sign indicating number that occurs on the diverse location with block yard between then allow identical.As long as keep the neighbouring relations of character wheel display digit, and the neighbouring relations between the definitions are not destroyed, corresponding relation between its definitions and the display digit can be determined arbitrarily, headed by the character wheel and connect and insert determined obstructions yard between two display digits (promptly being display digit " 0 " and " 9 ") of tail, and keep each intersymbol neighbouring relations of this group ring-type media code not destroy, totally ten groups of the media codes (seeing accompanying drawing 1 for details) of the present invention's design.2. sign band structure and transducer arrangements scheme: the present invention use four sensors to the one digit number character wheel of counter or with the synchronous solid of revolution of digit wheel on same ring-type sign band discern, to reach the purpose of simplifying analog-digital commutator.1. the structure of sign band: the digit wheel of decimal counter has ten display digits, so this digit wheel identifies band accordingly and also is divided into ten tag slots.For each sensor, its sign band has the id signal of expression state " 0 " or " 1 " respectively in ten tag slots, this status signal sign with on distribution situation be called the topological structure that this sign is with.If one sign has " 0 " state formation that one section continuous one state links to each other with a section, from " 1 " to " 0 " and the once variation from " 0 " to " 1 " will appear once when this sign band rotates a week so, the topological structure of this sign band, being called is 2 variations.And the like can draw 4 and change and the topological structure of 6 variations etc.A sign with on read its signal with four sensors that are installed in diverse location, the status signal that four corresponding each display digits of sensor are read when character wheel rotates a circle might not be identical, but the appearance number of its " 0 " one state signal and the order of variation are the same, because they are the signals that provided by same sign band, the topological structure of their status signal chains of reading is consistent in other words.Otherwise if a selected group coding, if four signal chains topological structure unanimities that sensor read, they just may a public sign band so.2. the relation between the change frequency of the number of media code and sign band topological structure: because the basis of the present invention's design is the ring-type media code, essential characteristic is adjacent two yards and has only a character opposite states that is in same position; That is to say when character wheel rotates to have a status signal that sensor read to change at every turn.Therefore can get: the media code number equals the sign band variation number sum that each sensor reads in the group.Because the variation number of sign band must be an even number, therefore the number of selected media code also must be an even number.Its output code is ten after the decade character wheel analog to digital conversion, adds to block sign indicating number, makes one group of selected media code should be 12 at least.And the decade character wheel needs 4 sensors at least, the present invention selects for use 4 sensors that the one digit number character wheel is discerned, they can read 2 * 4=8 different sign indicating number altogether when the sign band is two variations, and they can read 4 * 4=16 different sign indicating number altogether when the sign band is four variations.The number of media code can not be too much, because in one group of media code ten yard definitions as corresponding output code that only occur once will be arranged at least; If the number of sign indicating number only too much will make the sign indicating number that occurs once be less than ten, do not constitute the required media code of decade character wheel analog to digital conversion, drawing the simplest media code topological structure that four sensors share a ring-type sign band thus is four structures that change.Can certainly select slightly complicated structure, for example the six sign bands that change; But with regard to method for designing, there is no essential distinction, contain too much sign indicating number on the contrary and just mean the size that will reduce sensor reducing its minimum sign strip length that can discern, or increase the number of obstruction yard with above-mentioned simple structure; The former increases the difficulty on manufacturing and designing, and the latter influences practical effect.Therefore this instructions is mainly introduced to identify to be with and is had the scheme of simple topological structure.3. sign band and sensor are installed the phase relation that distributes: the display digit of character wheel is arranged along branches such as circumference, nominally therefore the nominal position of the area dividing of sign band and sensor installation all should be as the criterion with circumference in equal parts; If but in fact make ten strict five equilibriums, and will cause when the shared sign band of four sensors then that the sensor that surpasses reads the sign band simultaneously and change, this may misread as the mechanical counter analog to digital conversion time and not be allowed to.The present invention is an initial value with the nominal position of sign band and sensor, order according to the appearance of lattice media code, the minimum length that can discern with sensor is a unit, some the variation boundary line of sign band and the installation site and the generation of its nominal position of some sensor are departed from, this phase place (seeing accompanying drawing 3) that is called sign band or sensor installation that departs from.4. the validity judgment rule of ring-type media code: one group of prerequisite condition of effective ring-type media code is that yardage is not less than 12 and have the sign indicating number more than ten or ten only to occur once in the group.5. the installation of sensor distributes: according to the structure of multidigit mechanical counter and the physical dimension and the shape of proximity space thereof, the outside or inboard or end face on the solid of revolution that sign band is made on the character wheel or rotates synchronously with character wheel, sensor then is contained near the position (seeing accompanying drawing 4 and accompanying drawing 6) of sign band according to the requirement of sensing.Sensor distributes and is meant the location arrangements of each sensor when sensor is installed, sensor is installed circumference ten five equilibriums at place, sensor be installed in each etc. the center of subregion, when the sign band rotates, when a certain display digit center line of counter character wheel was positioned at the last subscript bound of display window, sensor was aimed at two separatrix in respective identification district respectively.The installation site of assert certain sensor arbitrarily marks 1～9 location label successively for " 0 " follows either direction, and the present invention is with { 0 R ₂R ₃R ₄Expression G1, G2, four sensors of G3, G4 are installed in 0 respectively, R ₂, R ₃, R ₄The position on, note: during installation as long as four sensors are installed in respectively on four positions that marked, might not want G1 to 0, G2 is to R ₂, G3 is to R ₃, G4 is to R ₄Install.6. identify the topological structure of band: will identify and be with ten five equilibriums, " 1 " or " 0 " is put in each zone respectively, and can constitute a kind of topological structure of sign band.The topological structure that four sensors of the present invention's design share a sign band has [4114], [4213], [2125] and [211114] four kinds, above-mentioned " [4114] " expression can be read 4 " 1 " successively when identifying band sensor when sensor installation sign direction is rotated, 1 " 0 ", the topological structure of 1 " 1 " and 4 " 0 " annular arrangements, this parameter also can be expressed as 4 " 0 ", 1 " 1 ", the topological structure of 1 " 0 " and 4 " 1 " annular arrangements, remaining is analogized in proper order, and negate of character state or reverse rotation in the topological structure of above-mentioned sign band are all belonged to the identical topological structure of essence.7. the topological structure of sign band is installed cooperating of distributing with sensor: the invention provides ten kinds altogether of the assembled schemes that sign band structure with Practical significance and sensor distribute, use respectively: [4114]/{ 0123}, [4213]/{ 0156}, [2125]/{ 0134}, [4213]/{ 0123}, [4213]/{ 0126}, [4213]/{ 0235}, [4213]/{ 0256}, [4213]/{ 0135}, [4213]/{ 0345} is with [211114]/{ 0123} represents.In sum, overall technological scheme of the present invention is: 1. be used for analog-to-digital ten groups of misread preventing media codes of multidigit decade mechanical counter displayed value scheme, these ten groups of misread preventing media code schemes are used code name [4114]/{ 0123} respectively, [4213]/{ 0156}, [2125]/{ 0134}, [4213]/{ 0123}, [4213]/{ 0126}, [4213]/{ 0235}, [4213]/{ 0256}, [4213]/{ 0135}, [4213]/{ 0345} and [211411]/{ 0123} represents (the topological structure and cooperating that the sensor installation distributes that the sign band also represented simultaneously in each code name), wherein any one group all can independently be used for multidigit decade mechanical counter displayed value is converted among the process of the BCD digital electric signal output code equivalent with it as the misread preventing media code, each media code shows with a tetrad digital watch, its weighted code is that each binary digit of this tetrad numeral of hypothesis has 8,4,2,1 temporary equivalent tens digit, be used to simplify statement to each media code, every group contains ten media codes that are called as definitions, and contain six or 14 non-definitions, represent its position with thick lines in table, scale-of-two definitions and corresponding weighted code thereof that the media code scheme that each code name is represented is contained are as follows:

2. multidigit decimal mechanical counter displayed value misread preventing conversion method, each digit wheel is with from corresponding sign by four sensors and is read the corresponding status signal of displayed value current with it, this group status signal is corresponding with a media code, use electronic translation that this media code is translated into BCD digital electric signal output code with the displayed value equivalence then, four sensors are with read state signal same ring-type sign, when sign band is rotated a week when above, any therebetween moment has only a status signal that sensor read to change at the most, and read whole media codes successively, the contained content of these media codes and selected media code scheme is corresponding one by one.3. multidigit decade mechanical counter displayed value misread preventing analog-digital commutator, it is made of the displayed value state recognition mechanism of each character wheel and follow-up electronic translation and electric signal output device, the state recognition mechanism of each character wheel is made up of four sensors and a shared status signal sign band, sign band be made on the character wheel or with the synchronous solid of revolution of character wheel on the inboard or the outside or end face on, and can make each sensor read two kinds of status signals of respective symbols " 0 " and " 1 ", determine the installation site and the corresponding sign band topological structure of sensor according to arbitrary group of media code scheme of real space choice of location of mechanism, if the selected media code scheme of each character wheel unanimity, media code is also consistent with the corresponding relation of output code, then can simplify follow-up decoding scheme, but the locus of the actual installation sensor of Ruo Yin mechanism is limit, each character wheel also allows different media code schemes, and this moment, follow-up decoding scheme wanted complicated.The present invention has realized that the decade mechanical counter is shown to the anti-error code conversion of digital signal output from simulation, solved the inconsistent problem of accumulated value that makes demonstration of work on the spot instrument and long-range meter reading device with burst transmissions, guaranteed transformed error within the scope of the positive and negative numeral of last digit character wheel displayed value, and gone for single-phase transmission or computer control system the data in real time inquiry from top to bottom of work on the spot instrument.

Description of drawings:

Fig. 1 is ten groups of media code schemes and the corresponding ten group id band structures and cooperating that sensor distributes that the present invention designs.

Fig. 2 is the Karnaugh map (mark is the weighted code that hypothesis G1, G2, G3, G4 had the right respectively 8,4,2,1 o'clock on the figure) that is read the ring-type media code by four sensors.

Fig. 3 is the synoptic diagram of sign band and sensor phase.

Fig. 4 is the design of sign band is distributed in circumferential area at the digit wheel upper sensor a structural representation.

Fig. 5 is the example of ring-type sign band " 0 " " 1 " symbol exchange.

Fig. 6 is the example that sensor is distributed in circumferential area and end region.

Fig. 7 adopts synchronizing wheel counter modulus conversion device structure figure.

Fig. 8 is a decade mechanical counter analog-digital commutator workflow block diagram.

1～8 couple of the present invention does to narrate by reference to the accompanying drawings.

Accompanying drawing 1 has provided the corresponding ten kinds of mark band structures of ten groups of intermediary's codes of the present invention's design and sensor location Assembled scheme, 1. the organize code name for " [4114]/{ 0123} " intermediary's code and mark band structure and sensor location Assembled scheme has been listed the definition of 8,12,14,15,7,11,5,2,1 and 00 power representation among the figure Code respectively has a thick line between definitions 7 and 11 and 2 and 1, represent respectively should insert one between these two codes Individual non-definitions; Two thick lines are arranged between definitions 11 and 5 and 5 and 2, represent respectively should between these two codes Insert two non-definitions. According to the character that only is in same position between adjacent two intermediary's codes opposite its Surplus each character is constant principle all, should insert 3 or 5 between 7 and 11, because 5 has been that therefore definitions should be inserted Enter 3, between 2 and 1, should insert 0 or 3 with reason, because 0 has been that therefore definitions also should insert 3; Insert between 11 and 5 two yards approach have six passages namely → 3 → 1 → 5, → 3 → 7 → 5, → 9 → 1 → 5, → 9 → 13 → 5, → 15 → 7 → 5, → 15 → 13 → 5, in these six passages 1,7,15 be definitions therefore Should insert 9 and 13, with reason between 5 and 2, insert two yards approach also have six passages namely → 3 → 1 → 5, → 3 → 7 → 5, → 0 → 1 → 5, → 0 → 4 → 5, → 6 → 7 → 5, → 6 → 4 → 5, in these six passages 1,7,0 Be that therefore definitions should insert 6 and 4. Non-definitions 3 appears at respectively 7 and 11 in this encoding scheme And between 2 and 1, secondary or non-fixed more than the secondary appear in the principle of design in one group of intermediary's code according to the present invention The justice code can only make to block code, therefore non-definitions 3 is made to block code. In this encoding scheme non-definitions 6,4, 9,13 occur once respectively only, therefore these four non-definitions are incorporated into nearby with numeral and are taken turns corresponding digital position Definitions uses, and has just obtained one group of complete intermediary's code scheme. Just can obtain with rule as stated above Whole codings in all the other nine groups of intermediary's code plans of the design of the present invention shown in the accompanying drawing 1.

After one group of media code is determined, the structure of sign band and the position distribution of sensor have also just been determined, the structure of sign band is to determine according to the variation that the corresponding digit wheel of sensor turns over a week resultant " 0 " and " 1 ", shown in Figure 1 the topological structure of 1. organizing media code scheme and sign band and sensor are installed parameter " [4114] " and " { 0123} " in cooperating of distributing, wherein [4114] are expressed as 4 " 1 ", 1 " 0 ", the topological structure of 1 " 1 " and 4 " 0 " ring-type sign bands, this parameter also can be expressed as 4 " 0 ", 1 " 1 ", the topological structure of 1 " 0 " and 4 " 1 " ring-type sign bands, accompanying drawing 5 have provided the example of ring-type sign band " 0 " " 1 " symbol exchange; The position that numeral sensor in " { } " is installed assert that arbitrarily the installation site of certain sensor marks 1～9 location label successively for " 0 " follows either direction, and the present invention is with { 0 R ₂R ₃R ₄Expression G1, G2, four sensors of G3, G4 are installed in 0 respectively, R ₂, R ₃, R ₄The position on, note: during installation as long as four sensors are installed in respectively on four positions that marked, might not want G1 to 0, G2 is to R ₂, G3 is to R ₃, G4 is to R ₄Install." { 012 3} " is expressed as four sensors and is installed in the position of label for " 0 ", " 1 ", " 2 ", " 3 " respectively.The particular location that sensor is installed should concrete structure be supporting decide according to the sign band, accompanying drawing 6 be the 1. organize code name for the topological structure of the media code scheme of " [4114]/{ 0123} " and sign band and sensor installation distribution cooperating and sensor is installed in the synoptic diagram of periphery, inboard and circumferential end surfaces.Accompanying drawing 4 is 1. to organize code name by the four of the matching design that distributes is installed for the topological structure of the media code scheme of " [4114]/{ 0123} " and sign band and sensor changes the sign band and be printed on the periphery of digit wheel press figure, and sensor is along the analog-to-digital utility model structural representation of one digit number character wheel of circumferential area distribution.

Embodiment 1: be used for analog-to-digital ten groups of misread preventing media codes of multidigit decade mechanical counter displayed value scheme, ten groups of misread preventing media code schemes are used code name [4114]/{ 0123} respectively, [4213]/{ 0156}, [2125]/{ 0134}, [4213]/{ 0123}, [4213]/{ 0126}, [4213]/{ 0235}, [4213]/{ 0256}, [4213]/{ 0135}, [4213]/{ 0345} is with [211411]/{ 0123} represents, wherein any one group all can independently be used for multidigit decade mechanical counter displayed value is converted among the process of the BCD digital electric signal output code equivalent with it as the misread preventing media code, each media code shows with a tetrad digital watch, its weighted code is that each binary digit of this tetrad numeral of hypothesis has 8,4,2,1 temporary equivalent tens digit, every group contains ten media codes that are called as definitions, and contain six or 14 non-definitions, represent its position with thick lines in table, scale-of-two definitions and corresponding weighted code thereof that the media code scheme that each code name is represented is contained are as follows:

The topological structure of [4114] expression 4 " 1 ", 1 " 0 ", 1 " 1 " and 4 " 0 " annular arrangements in the table, this parameter also can be expressed as the topological structure of 4 " 0 ", 1 " 1 ", 1 " 0 " and 4 " 1 " annular arrangements, remaining is analogized in proper order, negate of character state or reverse rotation in the topological structure of above-mentioned sign band are all belonged to the identical topological structure of essence, [4114] expression 4 changes, and [211411] expression 6 changes in the table.。The position that numeral sensor in " { } " is installed assert that arbitrarily the installation site of certain sensor marks 1～9 location label successively for " 0 " follows either direction, and the present invention is with { 0 R ₂R ₃R ₄Expression G1, G2, four sensors of G3, G4 are installed in 0 respectively, R ₂, R ₃, R ₄The position on, note: during installation as long as four sensors are installed in respectively on four positions that marked, might not want G1 to 0, G2 is to R ₂, G3 is to R ₃, G4 is to R ₄Install." 012 3} " represent that four sensors are installed in the position of label for " 0 ", " 1 ", " 2 ", " 3 " respectively.

Embodiment 2: multidigit decimal mechanical counter displayed value misread preventing conversion method, each digit wheel is with from corresponding sign by four sensors and is read and the corresponding status signal of current displayed value, this group status signal is corresponding with a media code, use electronic translation that this media code is translated into and two of displayed value equivalence then---tens digit electric signal output code, four sensors are with read state signal same ring-type sign, when sign band is rotated a week when above, any therebetween moment has only a status signal that sensor read to change at the most, and read whole media codes successively, the contained content of arbitrary group of media code scheme is corresponding one by one in these media codes and the selected accompanying drawing 1.Sensor is installed according to following regulation: the circumference of sensor being installed the place is divided on ten position of halving corresponding with the display digit center, the label of assert a certain installation site arbitrarily is 0, follow a certain direction and determine that successively label is 1～9 installation site, each sensor should be installed under that selected prescription case code name and arrange on the label shown in " { } " interior numeral.The status signal sign of sign band should be made by following regulation: assert that a kind of state represents with character " 1 ", another kind of state is represented with character " 0 ", ring-type sign band is divided into ten five equilibriums corresponding with display digit, according to the reverse direction of determining the sensing station label, take turns to be marked with state " 1 " and state " 0 ", each shared number of regions of identification-state is the numeral shown in arranging in " [] " on the selected scheme code name.Have only a sensor to read the variation of state recognition signal at the most when rotating for sign is with, when identifying the band rotation during one week, the binary code that the status signal that four sensors are read constitutes will be more than ten, 10. the organize code name and can occur 24 sign indicating numbers altogether for the scheme of " [211411]/{ 0123} " in accompanying drawing 1,16 sign indicating numbers all appear in other nine prescriptions cases, ten sign indicating numbers listing in table are definitions, unlisted sign indicating number is non-definitions, its position marks with thick black line in table, these non-definitions can be determined by adjacent principle one by one by the Karnaugh map shown in the accompanying drawing 2, and these non-definitions all do not repeat mutually with definitions, but then may repeat mutually between the non-definitions; Sign with on non-definitions be fabricated near the separatrix of subregions such as the determined definitions of that group media code scheme of 1 in accompanying drawing, cross over the separatrix or be close to a marginal side, its width is not less than the minimum widith that sensor can be differentiated, if this non-definitions secondary occurs or more than the secondary at diverse location, then this non-definitions must be to block sign indicating number, if then it can be handled as blocking sign indicating number only appears in certain non-definitions, also it can be looked same definitions and the common corresponding display digit of adjacent definitions on a position.When sensor read the obstruction sign indicating number, subsequent conditioning circuit should send a block signal, keeps original output code constant, reads new definitions up to sensor, and subsequent conditioning circuit side changes to the output code output corresponding with this definitions.Misread when preventing the digit wheel carry, the sign indicating number of obstruction should be arranged between display digit " 0 " and " 9 ", for making between display digit " 0 " and " 9 " there is the longest blocking time, display digit " 0 " and " 9 " should arrange two definitions adjacent with the longest obstruction sign indicating number corresponding, determined after " 0 " and " 9 " corresponding definitions that the pairing definitions of other display digit can be corresponding successively by adjacent principle.

Embodiment 3: with reference to accompanying drawing 7～8.Multidigit decade mechanical counter displayed value misread preventing analog-digital commutator, Fig. 7 is that a kind of employing will identify the structural drawing that band is produced on five decimal system mechanical counter analog-digital commutators on the synchronizing wheel, it is made of the displayed value state recognition mechanism of each character wheel and follow-up electronic translation and electric signal output device, the digital show state identification mechanism of its each character wheel is by one group of four sensor, one is shaped on and can be formed by the synchronizing wheel that four shared status signal signs of sensor are with, synchronizing wheel and digit wheel rotate synchronously, the fan type zone that the sign band is made ring-type, can make each sensor sensing go out two kinds of status signals of " 0 " and " 1 ", this device according to the real space choice of location use accompanying drawing 1 listed the 1. organize the media code scheme of code name for " [4114]/{ 0123} ", the topological structure of identified areas is by the relevant design parameter of this prescription case and determine on the installation site of sensor and the synchronizing wheel, the selected media code scheme of each character wheel unanimity, so the identified areas structure of synchronizing wheel is also consistent with the sensor installation site.Synchronizing wheel also rotated a week when digit wheel rotated a week, four sensors can be read 16 sign indicating numbers altogether, there are 15 to have nothing in common with each other in these 16 sign indicating numbers, the sign indicating number that wherein only occurs is once done the output code that definitions is assigned to ten correspondences, the sign indicating number of two repetitions is done and is blocked sign indicating number, and wherein blocking time, long obstruction sign indicating number was arranged near the separatrix of being close to digit wheel 9 and 0.When sensor reads definitions, the BCD output electron number character code of a correspondence is deciphered and exported to subsequent conditioning circuit, when sensor reads the obstruction sign indicating number, subsequent conditioning circuit sends a block signal, keep original output electron number character code constant, read new definitions up to sensing, subsequent conditioning circuit side changes to the electron number character code output code output corresponding with this definitions, and Fig. 8 is above-mentioned decade mechanical counter analog-digital commutator workflow block diagram.

Claims (8)

1. one kind is used for analog-to-digital ten groups of misread preventing media codes of multidigit decade mechanical counter displayed value scheme, it is characterized in that: ten groups of misread preventing sign indicating number intermediary schemes are used code name [4114]/{ 0123} respectively, [4213]/{ 0156}, [2125]/{ 0134}, [4213]/{ 0123}, [4213]/{ 0126}, [4213]/{ 0235}, [4213]/{ 0256}, [4213]/{ 0135}, [4213]/{ 0345} is with [211411]/{ 0123} represents, wherein any one group all can independently be used for multidigit decade mechanical counter displayed value is converted among the process of the BCD digital electric signal output code equivalent with it as the misread preventing media code, each media code shows with a tetrad digital watch, its weighted code is that each binary digit of this tetrad numeral of hypothesis has 8,4,2,1 temporary equivalent tens digit, every group contains ten media codes that are called as definitions, and contain six or 14 non-definitions, represent its position with thick lines in table, scale-of-two definitions and corresponding weighted code thereof that the media code scheme that each code name is represented is contained are as follows:

2. multidigit decade mechanical counter displayed value misread preventing analog-digital commutator, it is made of the displayed value state recognition mechanism of each character wheel and follow-up electronic translator and electric signal output device, the state recognition mechanism that it is characterized in that each character wheel is made up of four sensors and a shared status signal sign band, sign band be made on the character wheel or with the synchronous solid of revolution of character wheel on or on inboard or the outside or the end face, and can make each sensor read two kinds of status signals of respective symbols " 0 " and " 1 ", determine the installation site of sensor and identify the band topological structure accordingly according to the scheme that arbitrary group of listed media code code name of the real space choice of location claim 1 of mechanism represented, if the selected media code scheme of each character wheel unanimity, media code is also consistent with the corresponding relation of output code, then can simplify follow-up decoding scheme, but because of limitting each character wheel also to allow different media code schemes in the locus of the actual installation sensor of mechanism, this moment, follow-up decoding scheme wanted complicated.

3. according to described multidigit decade mechanical counter displayed value analog-to-digital ten groups of misread preventing media codes scheme and the conversion equipment of being used for of claim 1.2., it is characterized in that: sensor is installed according to following regulation: the circumference of sensor being installed the place is divided into ten five equilibriums corresponding with the display digit center, the label of assert a certain installation site arbitrarily is 0, follow a certain direction and determine that successively label is 1～9 installation site, each sensor should be installed under the selected media code scheme code name and arrange on the label shown in " { } " interior numeral.

4. according to described multidigit decade mechanical counter displayed value analog-to-digital ten groups of misread preventing media codes scheme and the conversion equipment of being used for of claim 1.2, it is characterized in that: the status signal sign of sign band should be made by following regulation: assert that a kind of state represents with character " 1 ", another kind of state is represented with character " 0 ", ring-type sign band is divided into ten five equilibriums corresponding with display digit, according to the reverse direction of determining the sensing station label, take turns to be marked with state " 1 " and state " 0 ", each shared number of regions of identification-state is the numeral shown in arranging in " [] " on the selected media code scheme code name.

5. according to claim 2 or 4 described multidigit decade mechanical counter displayed value analog-to-digital ten groups of misread preventing media codes scheme and the conversion equipments of being used for, it is characterized in that: have only a sensor to read the variation of state recognition signal at the most when rotating for sign is with, when identifying the band rotation during one week, the binary code that the status signal that four sensors are read constitutes will be more than ten, listed code name is that [211411]/{ 24 sign indicating numbers can appear in the scheme of 0123} altogether in claim 1,16 sign indicating numbers all appear in other nine schemes, ten sign indicating numbers listing in table are definitions, unlisted sign indicating number is non-definitions, its position marks with thick black line in table, these non-definitions can be determined by adjacent principle one by one by Karnaugh map, and these non-definitions all do not repeat mutually with definitions, but then may repeat mutually between the non-definitions; Sign with on non-definitions be fabricated near the separatrix by subregions such as the determined definitions of claim 5, cross over the separatrix or be close to a marginal side, its width is not less than the minimum widith that sensor can be differentiated, if this non-definitions secondary occurs or more than the secondary at diverse location, then this non-definitions must be to block sign indicating number, and if certain non-definitions only occurs on a position, then it can be handled as blocking sign indicating number, also it can be looked same definitions and the common corresponding display digit of adjacent definitions.

6. multidigit decade mechanical counter displayed value analog-to-digital ten groups of misread preventing media codes scheme and the conversion equipment of being used for according to claim 5, it is characterized in that: when sensor reads the obstruction sign indicating number, subsequent conditioning circuit should send a block signal, keep original output code constant, read new definitions up to sensing, subsequent conditioning circuit side changes to the output code output corresponding with this definitions.

7. according to described multidigit decade mechanical counter displayed value analog-to-digital ten groups of misread preventing media codes scheme and the conversion equipment of being used for of right 1.5.6, it is characterized in that: arranged the longest blocking time for making between display digit " 0 " and " 9 ", display digit " 0 " and " 9 " should arrange two definitions adjacent with the longest obstruction sign indicating number corresponding, determined after " 0 " and " 9 " corresponding definitions that the pairing definitions of other display digit can be corresponding successively by adjacent principle.

8, analog-to-digital ten groups of misread preventing media codes of multidigit decade mechanical counter displayed value scheme that is used for according to claim 1, it is characterized in that: " [4114] " expression media code vertical 4 " 1 " of scheme in 1. in the table, 1 " 0 ", the topological structure of 1 " 1 " and 4 " 0 " annular arrangements, scheme 2.～9. analogize in proper order, " [211411] " expression media code vertical 2 " 1 " of scheme in 10., 1 " 0 ", 1 " 1 ", 4 " 0 ", the topological structure of 1 " 1 " and 1 " 0 " annular arrangement, negate of character state or reverse rotation in the above-mentioned topological structure are all belonged to the identical topological structure of essence, the character state has 4 variations in four numeral topological structures in scheme " [4114] " 1., scheme 10. in " [211411] " expression 6 change; The numeral of scheme in " { 0123} " in 1. is that the position with first sensor is " 0 ", the position of second sensor and first sensor differ from the position of 1 numeral, the position of the 3rd sensor and first sensor differ from the position of 2 numerals, the position of the 4th sensor and first sensor differ from the position of 3 numerals, and remaining by that analogy; Thick black line is represented non-definitions in the table, and a thick black line is represented a non-definitions, when non-definitions only occurs a position, then can be used as and block sign indicating number or definitions, when making definitions then with the common corresponding display digit of adjacent definitions.

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