Optical guide metering device, metering method and intelligent meter head

Abstract

The present application relates to the field of flow metering, and in particular to a light guide metering device, a metering method and an intelligent meter head. The light guide metering device includes a mounting frame, a counting wheel, a light guide assembly and a processor. The processor is connected to a photoelectric conversion assembly corresponding to the light guide assembly one by one. The photoelectric conversion assembly includes a plurality of photoelectric converters; the light guide assemblies arranged at intervals at both ends are single-sided light guide assemblies, and the light guide assemblies between two single-sided light guide assemblies are double-sided light guide assemblies; the single-sided light guide assembly includes a first main body and a plurality of single-sided light guide parts; the first main body is provided with a first light guide column corresponding to the photoelectric converter and the single-sided light guide part one by one; the double-sided light guide assembly includes a second main body and a double-sided light guide part, and the double-sided light guide part has two light guide heads facing in opposite directions; the second main body is provided with a second light guide column corresponding to the photoelectric converter and the double-sided light guide part one by one. The present application can reduce the situation of signal recognition errors and has the advantage of high measurement accuracy.

Description

Technical Field

[0001] The present application relates to the field of flow measurement, and in particular to a light-conducting metering device, a metering method and an intelligent meter head. Background Art

[0002] At present, water meters and other flow metering devices are often equipped with multiple vertical number wheels for displaying flow. The specific flow situation can be determined by checking the value displayed after the number wheels are rotated. At the same time, in order to more conveniently obtain the specific flow situation, a light guide detection component that matches the number wheel will be installed in the water meter to form a light guide metering device that can measure the flow; and by connecting the light guide metering device to the communication module, the corresponding measured flow data can be transmitted to the designated receiving end for viewing, so as to achieve the function of remote meter reading.

[0003] The optical metering device mainly includes a counting wheel and an optical detection component matched with the counting wheel. The optical detection component includes a processor, a light source transmitter and a light source receiver. At the same time, the counting wheel is located between the light source transmitter and the light source receiver, and a light hole is provided on the counting wheel for light to pass through. When the counting wheel rotates until the light source transmitter is aligned with the light hole, the light source receiver can receive the light emitted by the light source transmitter. The processor is connected to the light source receiver, and can receive the pulse signal output by the light source transmitter and perform internal recording and calculation, so as to obtain the flow value corresponding to the current state of the counting wheel.

[0004] In the related art, in order to accurately grasp the flow value corresponding to the current state of the number of wheels, a plurality of independent light source emitting parts are arranged on the light source emitting part; at the same time, the processor is connected with the same number of photoelectric emitting tubes as the light source emitting parts, and a light guide is arranged one-to-one between the photoelectric emitting tubes and the light source emitting parts. Correspondingly, a plurality of light source receiving parts are arranged on the light source receiving part, and the number and position of the light source receiving parts correspond one-to-one to the light source emitting parts on the light source emitting part; at the same time, the processor is connected with a photoelectric receiving tube, and the plurality of light source receiving parts correspond to the photoelectric receiving tube through independent light guides.

[0005] However, due to the small size of the counting wheel, in order to accurately know the current state of the counting wheel, the spacing between each light source emitting part and the spacing between each light source receiving part are also small; after the light source emitting part guides the light to be emitted, other light source receiving parts adjacent to the light source receiving part corresponding to the light source emitting part that emits the light may also receive the emitted light, which may cause the optical waveguide metering device to have poor measurement accuracy. Summary of the invention

[0006] In a first aspect, in order to improve the measurement accuracy of a light guide metering device, the present application provides a light guide metering device.

[0007] The present application provides a light guide metering device that adopts the following technical solution:

[0008] A light guide metering device, comprising a mounting frame, a plurality of numbering wheels rotatably connected to the mounting frame, at least three light guide components connected to the mounting frame, and a processor, wherein the light guide components are arranged at intervals and the numbering wheels are located between two adjacent light guide components, the numbering wheels are provided with light through holes, the processor is connected with photoelectric conversion components of the same number as the number of light guide components and corresponding to each other, the photoelectric conversion components comprising a plurality of photoelectric converters; the light guide components at both ends of the plurality of light guide components arranged at intervals are single-sided light guide components, and the light guide component located between two single-sided light guide components is double-sided light guide components;

[0009] The single-sided light guide assembly comprises a first main body and a plurality of single-sided light guide portions arranged on the first main body and facing the same direction; the number of photoelectric converters in the photoelectric conversion assembly corresponding to the single-sided light guide assembly is the same as the number of single-sided light guide portions, and the first main body is provided with a first light guide column that corresponds the photoelectric converters to the single-sided light guide portions one by one;

[0010] The double-sided light guide component includes a second main body and a plurality of double-sided light guide parts arranged on the second main body and the same number as the single-sided light guide parts, the positions of the double-sided light guide parts correspond one-to-one to the single-sided light guide parts, and the double-sided light guide parts have two light guide heads facing away from each other, and the directions of the light guide heads and the single-sided light guide parts are both parallel to the arrangement direction of the light guide component; the number of photoelectric converters in the photoelectric conversion component corresponding to the double-sided light guide component is the same as the number of the double-sided light guide parts, and the second main body is provided with a second light guide column that corresponds one-to-one to the photoelectric converters and the double-sided light guide parts.

[0011] By adopting the above technical solution, multiple single-sided light guide parts in a single-sided light guide component and multiple first light guide columns corresponding to each other can form multiple independent light guide channels, and correspondingly, multiple independent light guide channels can also be formed in a double-sided light guide component; at the same time, multiple photoelectric converters correspond to each light guide channel one by one, and the photoelectric converter can emit light based on a control signal or generate a pulse signal based on light. Therefore, multiple independent detection light paths can be formed between two adjacent light guide components, and the photoelectric converters corresponding to each detection light path for emitting light or receiving light are independent of each other.

[0012] During the actual detection process, one of the two light guide components on both sides of the target number wheel is used as a light guide emitting element, and the other is used as a light guide receiving element; for the convenience of expression, the light guide channel in the light guide emitting element is called a first light guide channel, and the photoelectric converter corresponding to each first light guide channel is called a first photoelectric converter; the light guide channel in the light guide receiving element is called a second light guide channel, and the photoelectric converter corresponding to each second light guide channel is called a second photoelectric converter.

[0013] Specifically, the first photoelectric converters corresponding to the first light guide channel emit light one by one, and the light that is not blocked by the target number wheel is emitted to the second light guide channel under the guidance of the light guide emission component. The second light guide channel then guides the received light to the corresponding second photoelectric converter, and pulse information is emitted based on the light received by the second photoelectric converter. Finally, based on the pulse signal emission of all second photoelectric converters, the metering information corresponding to the current state of the target number wheel can be obtained.

[0014] Moreover, in the whole measurement and detection process, each detection optical path, the first photoelectric converter at the head end of the detection optical path, and the second photoelectric converter at the end of the detection optical path are independent of each other, and only when the light emitted by the first photoelectric converter at the head end of the same detection optical path is received by the second photoelectric converter at the end can the corresponding pulse signal be obtained. Therefore, even if the light is emitted through the first light guide channel and then received by the non-corresponding second light guide channel, the generated pulse signal can be clearly identified as an invalid signal, thereby improving the measurement accuracy of the light guide metering device.

[0015] Optionally, the single-sided light guide component and the double-sided light guide component are both integrally formed, and one end of the first light guide column is connected to the single-sided light guide part, and the other end is provided with a first light-transmitting part corresponding to the photoelectric converter; one end of the second light guide column is connected to the double-sided light guide part, and the other end is provided with a second light-transmitting part corresponding to the photoelectric converter.

[0016] By adopting the above technical solution, the single-sided light guide component and the double-sided light guide component are integrally formed, which is easy to manufacture and the integrated setting facilitates the overall installation of each light guide component. It also makes the light guide channel in the light guide component continuous and integrated, thereby reducing the leakage and weakening of light to a certain extent.

[0017] Optionally, the single-sided light guide component is integrally formed, and the multiple first light guide columns in the single-sided light guide component are linearly arranged, and the multiple first light guide columns are arranged symmetrically on the left and right; the double-sided light guide component is formed by splicing two single-sided light guide components, and the single-sided light guide parts in the two spliced ​​single-sided light guide components face oppositely to form a double-sided light guide part.

[0018] By adopting the above technical solution, the double-sided light guide component can be formed by splicing two single-sided light guide components, which means that in the actual preparation process, only one form of light guide component needs to be prepared, thereby reducing the mold opening cost to a certain extent.

[0019] Optionally, the first light guide columns in the two single-sided light guide assemblies can be bonded together to form a second light guide column, and the bonding surface of the first light guide column is provided with vertical ridges and vertical grooves along its own length direction, and the vertical ridges and vertical grooves are separated on both sides of the bonding surface, and the surface of the vertical ridge close to the middle area of ​​the first light guide column is a smooth light-transmitting surface on one side, and a rough surface on the other side; the wall of the vertical groove is a smooth light-transmitting surface; when the two first light guide columns are bonded together, the vertical ridges are embedded in the vertical grooves.

[0020] By adopting the above technical solution, the vertical convex strip embedded in the vertical groove can seal both sides of the fitting surface of the two first light guide columns, reducing the possibility of light leakage into the environment and causing the ambient brightness to increase and interfere with the accuracy of measurement and detection. At the same time, compared with the second light guide column formed in one piece, the second light guide column formed by splicing the two first light guide columns has a corresponding increase in the number of side walls for light path leakage, and because the fitting surfaces of the two first light guide columns cannot be completely fitted, the fitting surfaces will collect some leaked light. Correspondingly, the smooth light-transmitting surface set on the vertical convex strip and the vertical groove wall are smooth light-transmitting surfaces, which are convenient for the light between the fitting surfaces of the first light guide columns to be reflected back to the first light guide column via the vertical convex strip or via the vertical projection, which can supplement the light path intensity in the first light guide column to a certain extent and achieve the effect of reducing the light intensity loss in the first light guide column.

[0021] Optionally, a gap light blocking component is provided at the bonding surface of the two first light guide pillars in the second light guide pillar, the gap light blocking component is located at one end of the second light guide pillar away from the double-sided light guide part, and the gap light blocking component includes a transverse convex strip and a transverse groove provided on the first light guide pillar and matched with each other;

[0022] The outer surface of the transverse convex strip is a smooth light-transmitting surface on one side away from the single-sided light-guiding portion, and a rough surface on the other side. The transverse groove is a smooth light-transmitting surface. When two of the first light-guiding columns are bonded together to form a second light-guiding column, the transverse convex strip is embedded in the transverse groove.

[0023] By adopting the above technical solution, the side of the two first light guide columns that are assembled to form the second light guide column away from the single-sided light guide portion is used to correspond to the photoelectric converter. If it is used to receive the light emitted by the photoelectric converter, the setting of the gap light blocking component can be utilized to reduce the situation where light is injected from the gap between the fitting surfaces of the two first light guide columns; and the smooth light-transmitting surfaces on the transverse convex strips and the transverse grooves can be used to allow light emitted toward the gap to enter the first light guide column, which can supplement the light path intensity in the first light guide column to a certain extent.

[0024] Optionally, the number of first light guide columns in the single-sided light guide assembly is an even number, the transverse convex strip is provided on one of the two symmetrically arranged first light guide columns, and the transverse groove is provided on the other one;

[0025] Or, the number of first light guide columns in the single-sided light guide component is an odd number, and the central first light guide column is provided with both transverse ridges and transverse grooves, and the positions of the transverse ridges and transverse grooves are arranged symmetrically; one of the two symmetrically arranged first light guide columns has a transverse ridge, and the other has a transverse groove.

[0026] By adopting the above technical solution, the structure of the first light guide column is set based on the number of first light guide columns actually required, so that the corresponding gap light blocking component can be obtained by bonding two single-sided light guide components with the same structure.

[0027] Optionally, the end of the first light guide column away from the first light guide portion is provided with a light-transmitting portion for light to enter and exit, and the light-transmitting portion is used to align with the photoelectric converter; an end connecting strip is provided between two adjacent first light guide columns, and the end connecting strip is located at one end of the first light guide column close to the light-transmitting portion;

[0028] The optical guide metering device also includes an optical guide fixing seat for connecting the single-sided optical guide assembly and the double-sided optical guide assembly to the mounting frame, the optical guide fixing seat includes a fixing base and a limiting end plate; the mounting frame is provided with an embedding opening for the fixing base to be embedded, the fixing base is provided with a through hole, and the side of the single-sided optical guide assembly with the single-sided light guide part and the side of the double-sided optical guide assembly with the double-sided light guide part can extend into the mounting frame from the through hole;

[0029] The one-side light guide assembly has one end of the end connecting strip as a limiting end, and the fixed base is provided with a receiving groove connected to the through hole and used to receive the limiting end; the groove wall of the receiving groove is provided with a limiting groove, and the end connecting strip is provided with a limiting strip capable of being embedded in the limiting groove;

[0030] The limiting end plate is used to cover the accommodating groove, and the limiting end plate is provided with a clamping groove matched with the limiting end, and the bottom of the clamping groove is provided with an optical path through hole corresponding to the light-transmitting portion of the first light guide column.

[0031] By adopting the above technical solution, the end connecting strip is arranged to connect multiple first light guide columns. At the same time, the fixed base and the limiting end plate in the light guide fixing seat are used to realize the limiting fixation of the single-sided light guide component and the double-sided light guide component spliced ​​by two single-sided light guide components, which is convenient for positioning the light guide component.

[0032] Optionally, a middle connecting strip is provided between two adjacent first light guide pillars, and the middle connecting strip is located in the middle of the first light guide pillars;

[0033] A folding piece matched with the double-sided light guide assembly is provided on one side of the fixed base away from the limiting end plate, and the position of the folding piece corresponds to the middle connecting strip; the folding piece includes two branches and an end strip connected between the two branches, the two branches of the folding piece are separated on both sides of the through hole, and the distance between the two branches relative to the side walls gradually decreases along the direction close to the end strip;

[0034] The end bar is located at the end of the support bar away from the fixed base, and an inclined pressing surface is provided at the connection between the end bar and the support bar. An inclined pressure surface is provided at the edge of the middle connecting bar away from the limiting end. The inclined pressing surface is used to press against the inclined pressure surface to keep the two single-sided light guide components in the double-sided light guide component in a fitted state.

[0035] By adopting the above technical solution, the setting of the middle connecting strip can improve the connection stability between adjacent first light guide columns in the entire single-sided light guide component, and reduce the tilting of the first light guide columns; at the same time, the setting of the gathering piece can gather the middle connecting strips in the two spliced ​​single-sided light guide components, thereby reducing the possibility of the first light guide columns tilting, so as to reduce the tilt of the first light guide columns and affect the normal transmission of the detection light path, thereby maintaining the good progress of the measurement and detection.

[0036] In a second aspect, in order to improve the measurement accuracy of the optical waveguide measurement device, the present application provides a measurement method.

[0037] A measurement method provided in this application adopts the following technical solution:

[0038] A measurement method, applied to the above-mentioned light guide measurement device, comprises the following steps:

[0039] S1. Determine the target number of rounds based on the detection order;

[0040] S2. Based on the target number wheel, determine the light guide emitter and the light guide receiver, and determine a plurality of first photoelectric converters based on the light guide emitter, and determine a plurality of second photoelectric converters based on the light guide receiver; wherein the light guide emitter is one of the two light guide components on both sides of the target number wheel, and the light guide receiver is the other; the light guide emitter has a plurality of independent first light guide channels, each of which corresponds to the first photoelectric converter, and the light guide receiver has a plurality of independent second light guide channels, each of which corresponds to the second photoelectric converter; the emitting end of the first light guide channel corresponds to the receiving end of the second light guide channel;

[0041] S3, sending luminous signals to the plurality of first photoelectric converters one by one, so that,

[0042] The plurality of first photoelectric converters emit light to the corresponding first light guide channels one by one;

[0043] Each first light guide channel guides the light one by one and directs the light that is not blocked by the target number wheel to the corresponding second light guide channel;

[0044] Each second light guide channel guides the received light to the corresponding second photoelectric converter;

[0045] S4, based on the light received by the second photoelectric converter, performing a round state judgment, and based on the judgment result, determining the metering information of the current target round;

[0046] S5, performing order determination based on the detection sequence number of the current target number round, and returning to step S1 or executing step S6 based on the determination result;

[0047] S6. Output the measurement result based on the measurement information corresponding to each target number round.

[0048] By adopting the above technical solution, the first photoelectric converters corresponding to the first light guide channel emit light one by one, and the light that is not blocked by the target number wheel is emitted to the second light guide channel under the guidance of the light guide emitting element. The second light guide channel then guides the received light to the corresponding second photoelectric converter, and based on the light receiving conditions of all the second photoelectric converters, the metering information corresponding to the current state of the target number wheel is obtained.

[0049] During the entire measurement and detection process, each detection optical path, the first photoelectric converter at the head end of the detection optical path, and the second photoelectric converter at the end of the detection optical path are independent of each other, and only when the light emitted by the first photoelectric converter at the head end of the same detection optical path is received by the second photoelectric converter at the end can the corresponding pulse signal be obtained. Therefore, even if the light is emitted through the first light guide channel and then received by the non-corresponding second light guide channel, the generated pulse signal can be clearly identified as an invalid signal, thereby improving the measurement accuracy of the light guide metering device.

[0050] On the third aspect, in order to realize convenient remote meter reading, the present application provides a smart meter head.

[0051] The smart meter provided in this application adopts the following technical solution:

[0052] A smart meter head comprises the above-mentioned light-conducting metering device and a meter, wherein the meter is a mechanical meter and the processor is connected to a communication module.

[0053] By adopting the above technical solution, after the optical metering device obtains the metering result in the meter, the communication module can send the metering result to the corresponding receiving terminal for viewing, thereby achieving the purpose of remote meter reading.

[0054] In summary, the present application includes at least one of the following beneficial technical effects:

[0055] 1. During the entire measurement and detection process, each detection optical path, the first photoelectric converter at the head end of the detection optical path, and the second photoelectric converter at the end of the detection optical path are independent of each other. Only when the light emitted by the first photoelectric converter at the head end of the same detection optical path is received by the second photoelectric converter at the end can the corresponding pulse signal be obtained; even if the light is emitted through the first light guide channel and then received by the non-corresponding second light guide channel, the generated pulse signal can be clearly identified as an invalid signal, thereby improving the measurement accuracy of the light guide metering device;

[0056] 2. It can reduce the leakage and weakening of light, thereby reducing the possibility of optical signal being misidentified and improving the overall measurement accuracy;

[0057] 3. The double-sided light guide component can be formed by splicing two single-sided light guide components, which means that in the actual preparation process, only one form of light guide component needs to be prepared. BRIEF DESCRIPTION OF THE DRAWINGS

[0058] Figure 1 is a schematic structural diagram of the light guide metering device in Example 1 of the present application;

[0059] Figure 2 is a schematic diagram of a light guide fixing seat and a light guide assembly in Example 1 of the present application;

[0060] Figure 3 is a schematic diagram of a single-sided light guide assembly in Example 1 of the present application;

[0061] Figure 4 is a schematic diagram of a double-sided light guide assembly in Example 1 of the present application;

[0062] Figure 5 is a side view of a single-sided light guide assembly in Example 2 of the present application;

[0063] Figure 6 is a schematic diagram of combining a single-sided light guide assembly into a double-sided light guide assembly in Example 2 of the present application;

[0064] Figure 7 is an exploded schematic diagram of the light guide fixing seat in Example 2 of the present application;

[0065] Figure 8 is an exploded schematic diagram of the light guide fixing seat in Embodiment 2 of the present application from another perspective;

[0066] Fig. 9 yes Figure 7 A magnified schematic diagram of part A;

[0067] Fig.10 It is a simplified flow chart of the measurement method in the embodiment of the present application;

[0068] Fig.11 It is a schematic diagram of the arrangement of the light guide assembly and the number wheels in the embodiment of the present application.

[0069] Description of reference numerals: 1, mounting frame; 11, mounting plate; 12, support rod; 13, embedding port; 2, number wheel; 3, light guide fixing seat; 31, fixing base; 311, through hole; 312, accommodating groove; 313, limiting groove; 32, limiting end plate; 321, clamping groove; 322, optical path through hole; 33, folding member; 331, support bar; 332, end bar; 333, inclined pressing surface; 4, single-sided light guide assembly; 41. First light guide column; 411. First light-transmitting portion; 412. Vertical ridges; 413. Vertical grooves; 414. Horizontal ridges; 415. Horizontal grooves; 42. Single-sided light guide portion; 43. End connecting strips; 431. Limiting strips; 44. Middle connecting strips; 441. Inclined pressure surface; 5. Double-sided light guide assembly; 51. Second light guide column; 511. Second light-transmitting portion; 52. Double-sided light guide portions; 521. Light guide head. DETAILED DESCRIPTION

[0070] The following is combined with Figure 1-11 This application is described in further detail.

[0071] The embodiment of the present application discloses a light guide metering device.

[0072] Example 1

[0073] Reference Figure 1 The optical metering device comprises a mounting frame 1, a plurality of number wheels 2 rotatably connected to the mounting frame 1, at least three optical guide components connected to the mounting frame 1, an optical guide fixing seat 3 and a processor; wherein the optical guide fixing seat 3 is used to fix the optical guide components, and the optical guide fixing seat 3 can be fixedly connected to the mounting frame 1. The optical guide components are arranged at intervals and the number wheels 2 are located between two adjacent optical guide components; at the same time, a light-through hole is opened on the number wheel 2, so that optical signals can be transmitted between the two optical guide components on both sides of the number wheel 2.

[0074] In addition, the processor in this embodiment is a circuit board, and the processor is connected to photoelectric conversion components whose number is the same as the number of light guide components and corresponds one to one. The photoelectric conversion component includes a plurality of photoelectric converters, which can emit light based on electrical signals and can also generate pulse signals based on optical signals. During actual assembly, the circuit board can be fixedly connected to the mounting frame 1 by bolts, and the circuit board can be attached to the light guide fixing seat 3, so that the photoelectric converter on the circuit board can emit light to the light guide component or receive light signals from the light guide component. The photoelectric conversion component can be used to determine whether the light signal between the two light guide components on both sides of the number wheel 2 is blocked, and then based on the blocking condition of the light signal, the metering information corresponding to the current state of the number wheel 2 can be obtained.

[0075] Specifically, the mounting frame 1 includes two matching mounting plates 11 and a support rod 12 connected between the two mounting plates 11, so that a mounting space is formed between the two mounting plates 11; accordingly, a mounting shaft is provided in the mounting space, and a plurality of number wheels 2 are arranged at intervals along the axial direction of the mounting shaft and are all rotatably sleeved on the mounting shaft, so as to realize the rotational connection between the number wheels 2 and the mounting frame 1. At the same time, an embedding opening 13 corresponding to the mounting position of the number wheels 2 is provided on one of the mounting plates 11, and the light guide fixing seat 3 fixed with the light guide assembly can be matched with the embedding opening 13, so as to achieve the purpose of relatively connecting the light guide assembly with the mounting plate 11; and when the light guide fixing seat 3 is embedded in the embedding opening 13, the light guide assembly can extend into the mounting space of the mounting frame 1 and match with the number wheels 2.

[0076] Reference Figure 1 and Figure 2 In this embodiment, there are four number wheels 2, and correspondingly, there are five light guide components. The five light guide components are linearly arranged at intervals, and four detection areas corresponding to the number wheels 2 are formed; specifically, among the five light guide components arranged at intervals, the two at both ends are single-sided light guide components 4, and the three between the two single-sided light guide components 4 are double-sided light guide components 5.

[0077] Reference Figure 3 , wherein the single-sided light guide component 4 is integrally formed, and the single-sided light guide component 4 includes a first main body and a plurality of single-sided light guide portions 42 formed on the first main body and facing the same direction; at the same time, the first main body has the same number of first light guide columns 41 as the number of the single-sided light guide portions 42, and the first light guide columns 41 are independent of each other and are connected to the single-sided light guide portions 42 one by one.

[0078] Specifically, the light guiding direction of the single-sided light guiding part 42 is perpendicular to the light guiding direction of the first light guiding column 41, and the connection between the single-sided light guiding part 42 and the first light guiding column 41 has an inclined reflective surface, so that the first light guiding column 41 and the single-sided light guiding part 42 can form an angled light path with an angle of 90° through the inclined reflective surface. Accordingly, the number of photoelectric converters in the photoelectric conversion component corresponding to the single-sided light guide component 4 is the same as the number of the first light guiding column 41 and corresponds one to one; in this embodiment, a smooth first light-transmitting part 411 is also provided at the end of the first light guiding column 41 close to the photoelectric converter to facilitate light to enter and exit the first light guiding column 41.

[0079] Reference Figure 4The double-sided light guide assembly 5 is integrally formed, and includes a second body and a plurality of double-sided light guide portions 52 formed on the second body and the same number as the single-sided light guide portion 42; when implemented, the positions of the double-sided light guide portions 52 can correspond to the positions of the single-sided light guide portion 42. The double-sided light guide portion 52 has two light guide heads 521 facing away from each other, and the directions of the light guide heads 521 and the single-sided light guide portion 42 are parallel to the arrangement direction of the light guide assembly, so that light can be transmitted between the double-sided light guide portion 52 and the single-sided light guide portion 42, and between the double-sided light guide portions 52 and the double-sided light guide portions 52.

[0080] In addition, the second main body has the same number of second light guide columns 51 as the number of double-sided light guide parts 52. The second light guide columns 51 are independent of each other and are connected to the double-sided light guide parts 52 in a one-to-one correspondence. The two light guide heads 521 of the double-sided light guide parts 52 face opposite directions and are perpendicular to the second light guide columns 51. At the same time, the connection between the light guide head 521 and the second light guide column 51 has an inclined reflective surface, so that the second light guide column 51 and the light guide head 521 can form an angled optical path with an angle of 90° through the inclined reflective surface. Correspondingly, the number of photoelectric converters in the photoelectric conversion assembly corresponding to the double-sided light guide assembly 5 is the same as the number of the second light guide columns 51 and corresponds to each other one by one; and a smooth second light-transmitting portion 511 is provided at the end of the second light guide column 51 close to the photoelectric converter to facilitate the entry and exit of light into and out of the second light guide column 51.

[0081] In the present embodiment, there are five first light guide columns 41 and five single-sided light guide parts 42 in the single-sided light guide component 4, and there are five second light guide columns 51 and five double-sided light guide parts 52 in the double-sided light guide component 5; accordingly, the number of photoelectric converters in the photoelectric conversion component corresponding to the single-sided light guide component 4 is also five, and the number of photoelectric converters in the photoelectric conversion component corresponding to the double-sided light guide component 5 is also five.

[0082] In the actual detection process, five detection light paths can be formed between the two sets of light guide components. If the detection light path passing through the light hole of the number wheel 2 is regarded as "1" and the detection light path blocked by the number wheel 2 is regarded as "0", then the five detection light paths can theoretically form a maximum of thirty-two combination signals, for example: (0,0,0,0,0), (0,0,0,0,1), (0,0,0,1,0), (0,0,0,1,1), (0,0,1,0,0), (0,0,1,0,1), (0,0,1,1,0), (0,0,1,1,0), (0,0,1,1,0), (0,0,1,1,1), ..., (0,1,1,1,1), (1,1,1,1,1,1).

[0083] Based on the number of metering information actually required by the number wheel 2, a corresponding number of combination signals can be selected to correspond to the metering signals of the number wheel 2, so as to obtain the metering information of the number wheel 2 through the above detection. Specifically, if the overall measurement adopts decimal system, and the number wheel 2 corresponds to ten metering information of "0-9", then ten of the above thirty-two combination signals are selected to correspond thereto, so as to obtain the metering information through detection.

[0084] The implementation principle of a light guide metering device in the embodiment of the present application is:

[0085] The multiple single-sided light guide parts 42 in the single-sided light guide component 4 and the multiple first light guide columns 41 corresponding to each other can form multiple independent light guide channels. Correspondingly, the double-sided light guide component 5 can also form multiple independent light guide channels. At the same time, the multiple photoelectric converters correspond to each light guide channel one by one, and the photoelectric converters can emit light based on the control signal or generate pulse signals based on the light. Therefore, multiple independent detection light paths can be formed between two adjacent light guide components, and the photoelectric converters for emitting light or receiving light corresponding to each detection light path are independent of each other.

[0086] During the actual detection process, one of the two light guide components on both sides of the target number wheel 2 is used as a light guide emitting element, and the other is used as a light guide receiving element; for the convenience of description, the light guide channel in the light guide emitting element is called a first light guide channel, and the photoelectric converter corresponding to each first light guide channel is called a first photoelectric converter; the light guide channel in the light guide receiving element is called a second light guide channel, and the photoelectric converter corresponding to each second light guide channel is called a second photoelectric converter.

[0087] Specifically, the first photoelectric converters corresponding to the first light guide channel emit light one by one, and the light guide emission element guides the light that is not blocked by the target number wheel 2 to the second light guide channel, and then the second light guide channel guides the received light to the corresponding second photoelectric converter, and pulse information is emitted based on the light received by the second photoelectric converter. Finally, based on the emission of the pulse signals of all the second photoelectric converters, the metering information corresponding to the current state of the target number wheel 2 can be obtained.

[0088] Moreover, in the whole measurement and detection process, each detection optical path, the first photoelectric converter at the head end of the detection optical path, and the second photoelectric converter at the end of the detection optical path are independent of each other, and only when the light emitted by the first photoelectric converter at the head end of the same detection optical path is received by the second photoelectric converter at the end can the corresponding pulse signal be obtained. Therefore, even if the light is emitted through the first light guide channel and then received by the non-corresponding second light guide channel, the generated pulse signal can be clearly identified as an invalid signal, thereby improving the measurement accuracy of the light guide metering device.

[0089] Example 2

[0090] The present application embodiment discloses a light guide metering device. Figure 5 and Figure 6 The difference between this embodiment and the embodiment 1 is that the double-sided light guide assembly 5 is formed by assembling two single-sided light guide assemblies 4, and the single-sided light guide portions 42 in the two assembling single-sided light guide assemblies 4 face opposite directions to form a double-sided light guide portion 52. At the same time, in order to assemble two single-sided light guide assemblies 4 to form a double-sided light guide assembly 5, the multiple first light guide columns 41 in the single-sided light guide assembly 4 are linearly arranged, and the multiple first light guide columns 41 are bilaterally symmetrical.

[0091] At the same time, two first light guide columns 41 can be attached to form a second light guide column 51, and the attached surface of the first light guide column 41 is provided with a vertical ridge 412 and a vertical groove 413 along its length direction; the vertical ridge 412 and the vertical groove 413 are separated on both sides of the attached surface of the first light guide column 41, and when the two first light guide columns 41 are attached to form the second light guide column 51, the vertical ridge 412 is embedded in the vertical groove 413. The vertical ridge 412 is embedded in the vertical groove 413 to seal both sides of the attached surface of the two first light guide columns 41, reducing the possibility of light leaking into the environment and causing the ambient brightness to increase and interfere with the measurement and detection accuracy.

[0092] In addition, the side of the surface of the vertical convex strip 412 close to the middle area of ​​the first light guide column 41 is a smooth light-transmitting surface, and the other side is a rough surface; and the wall of the vertical groove 413 is a smooth light-transmitting surface. It is convenient for the light between the bonding surfaces of the first light guide column 41 to pass through the vertical convex strip 412 or to be reflected back into the first light guide column 41 vertically, which can supplement the light path intensity in the first light guide column 41 to a certain extent and achieve the effect of reducing the light intensity loss in the first light guide column 41.

[0093] In order to reduce the situation where light enters from the gap between the mating surfaces of the two first light guide columns 41, a gap light blocking component is also provided at the mating surfaces of the two first light guide columns 41 in the second light guide column 51; specifically, the gap light blocking component is located at the end of the second light guide column 51 away from the double-sided light guide portion 52, and the gap light blocking component includes a transverse ridge 414 and a transverse groove 415 formed on the first light guide column 41 and matched with each other. When the first light guide columns 41 are bonded to form the second light guide column 51, the transverse ridge 414 is embedded in the transverse groove 415; at the same time, the outer surface of the transverse ridge 414 is a smooth light-transmitting surface on one side away from the single-sided light guide portion 42, and a rough surface on the other side, while the groove walls of the transverse groove 415 are all smooth light-transmitting surfaces; the setting of the smooth light-transmitting surface can be used to allow light directed to the gap to enter the first light guide column 41.

[0094] In this embodiment, the number of first light guide columns 41 in the single-sided light guide assembly 4 is an odd number, and accordingly, the first light guide column 41 in the center is provided with both a transverse ridge 414 and a transverse groove 415, and the positions of the transverse ridge 414 and the transverse groove 415 are arranged symmetrically; and, except for the first light guide column 41 in the center, one of the two first light guide columns 41 arranged symmetrically has a transverse ridge 414, and the other has a transverse groove 415. In another embodiment, the number of first light guide columns 41 in the single-sided light guide assembly 4 may also be an even number, such as four, six, etc.; accordingly, the transverse ridge 414 is formed on one of the two first light guide columns 41 arranged symmetrically, and the transverse groove 415 is formed on the other.

[0095] Reference Figure 6 and Figure 7 An end connection bar 43 is formed between two adjacent first light guide columns 41 in a single-sided light guide component 4, and the end connection bar 43 is located at one end of the first light guide column 41 close to the light-transmitting portion. At the same time, the end of the single-sided light guide component 4 having the end connection bar 43 can be called a limit end, and the light guide fixing seat 3 is used to fix the limit end of the single-sided light guide component 4.

[0096] Reference Figure 7 and Figure 8 The light guide fixing seat 3 includes a fixing base 31 and a limiting end plate 32, wherein the fixing base 31 is provided with a through hole 311 and a receiving groove 312 connected to the through hole 311; specifically, the receiving groove 312 is used to receive the limiting end, and the through hole 311 allows the single-side light guide assembly 4 and the double-side light guide assembly 5 to extend into the mounting frame 1. At the same time, the groove wall of the receiving groove 312 is provided with a limiting groove 313, correspondingly, combined with Figure 6 The end connecting strip 43 is formed with a limiting strip 431 that can be embedded in the limiting groove 313; the relative positioning between the single-sided optical waveguide component 4 and the fixed base 31 is achieved through the cooperation between the limiting strip 431 and the limiting groove 313.

[0097] The limiting end plate 32 does not cover the accommodating groove 312 to achieve the purpose of limiting the limiting end, and the limiting end plate 32 is formed with a clamping groove 321 that matches the limiting end; the natural groove width of the clamping groove 321 is slightly smaller than the size of the limiting groove 313, so that when the limiting end is embedded in the clamping groove 321, the clamping groove 321 can clamp and fix the limiting end. At the same time, the bottom of the clamping groove 321 is provided with an optical path through hole 322 for aligning with the light-transmitting portion of the first light guide column 41, and when the circuit board is attached to the limiting end plate 32, the photoelectric converter on the circuit board and the optical path through hole 322 are in a one-to-one correspondence, so that light is transmitted between the first light guide column 41 and the photoelectric converter through the optical path through hole 322 and the light-transmitting portion.

[0098] In addition, a middle connecting strip 44 is formed between two adjacent first light guide columns 41 in the same single-sided light guide component 4. The middle connecting strip 44 is located in the middle of the first light guide column 41, which can improve the connection stability between the adjacent first light guide columns 41 in the entire single-sided light guide component 4 and reduce the tilting of the first light guide column 41. At the same time, a folding member 33 that cooperates with the double-sided light guide component 5 is provided on the side of the fixed base 31 away from the limiting end plate 32, and the position of the folding member 33 corresponds to the position of the middle connecting strip 44. Through the setting of the folding member 33, the middle connecting strips 44 in the two single-sided light guide components 4 that are assembled are forced to be folded, so as to maintain a good fit between the two single-sided light guide components 4, thereby reducing the possibility of tilting of the first light guide column 41.

[0099] Specifically, refer to Fig. 9 The folding member 33 includes two support bars 331 and an end bar 332 connected between the two support bars 331, wherein the two support bars 331 of the folding member 33 are located on both sides of the through hole 311, and the distance between the two support bars 331 relative to the side walls gradually decreases in the direction close to the end bar 332; the end bar 332 is located at the end of the support bar 331 away from the fixed base 31, and an inclined pressing surface 333 is formed at the connection between the end bar 332 and the support bar 331. Figure 6 The edge of the middle connecting strip 44 away from the limiting end is provided with an inclined pressure surface 441 that matches the inclined pressing surface 333; the inclined pressing surface 333 presses against the inclined pressure surface 441 to maintain a good fitting state between the two single-sided light guide components 4 in the double-sided light guide component 5.

[0100] The present application also discloses a measurement method, referring to Fig.10 and Fig.11 , applied to the above-mentioned light guide metering device, comprising the following steps:

[0101] S1. Determine the target number round 2 based on the detection order.

[0102] The detection order is a preset detection order. In this embodiment, there are four number wheels 2 in total and five light guide components; for the convenience of description, the five light guide components are named the first light guide, the second light guide, the third light guide, the fourth light guide and the fifth light guide, respectively, and correspondingly, the four number wheels 2 are the first wheel, the second wheel, the third wheel and the fourth wheel.

[0103] In this embodiment, four number wheels 2 can be taken as a group and tested at the same time, that is, there is only one test batch at this time, and there are four target number wheels 2 in the test batch. In another embodiment, the number wheels 2 can also be tested one by one along the arrangement direction, that is, there are four test batches at this time, and there is one target number wheel 2 in each test batch.

[0104] S2. Based on the target number wheel 2, determine the light guide emitting element and the light guide receiving element, determine a plurality of first photoelectric converters based on the light guide emitting element, and determine a plurality of second photoelectric converters based on the light guide receiving element.

[0105] The light guide emitter is one of the two light guide components on both sides of the target number wheel 2, and the light guide receiver is the other. At the same time, the light guide emitter has multiple independent first light guide channels, and the first light guide channels correspond to the first photoelectric converters one by one; the light guide receiver has multiple independent second light guide channels, and the second light guide channels correspond to the second photoelectric converters one by one. Moreover, the emitting end of the first light guide channel corresponds to the receiving end of the second light guide channel one by one.

[0106] In this embodiment, when the light guide component corresponding to the light guide emitting element or the light guide receiving element is a single-sided light guide component 4, the corresponding first light guide channel or the second light guide channel is a combination of the first light guide column 41 and the single-sided light guide part 42; when the light guide component corresponding to the light guide emitting element or the light guide receiving element is a double-sided light guide component 5, the corresponding first light guide channel or the second light guide channel is a combination of the second light guide column 51 and a light guide head 521 in the double-sided light guide part 52.

[0107] At the same time, in this embodiment, four number wheels 2 can be inspected in the same batch; accordingly, the first light guide, the third light guide and the fifth light guide can be selected as light guide emitting elements, and the second light guide and the fourth light guide can be selected as light guide receiving elements; or, the second light guide and the fourth light guide can be selected as light guide emitting elements, and the first light guide, the third light guide and the fifth light guide can be selected as light guide receiving elements.

[0108] In another embodiment, the four counting wheels 2 can be divided into four batches and tested one by one, specifically, in the order of the first round, the second round, the third round and the fourth round; when testing the first round, the first light guide can be selected as the corresponding light guide emitting element, and the second light guide can be selected as the corresponding light guide receiving element to detect the metering information corresponding to the first round; when testing the second round, the second light guide can be selected as the corresponding light guide emitting element, and the third light guide can be selected as the corresponding light guide receiving element to detect the metering information corresponding to the second round; at the same time, because the second light guide is a double-sided light guide component 5, the second light guide can also guide the light to the first light guide, and accordingly, the metering information obtained in the last round of the first round can be tested again for verification. The subsequent detection process of the third and fourth rounds is basically similar, and will not be repeated here.

[0109] S3, sending luminous signals to the plurality of first photoelectric converters one by one; so that the plurality of first photoelectric converters emit light to the corresponding first light guide channels one by one; each first light guide channel guides the light one by one and emits the light that is not blocked by the target number wheel 2 to the corresponding second light guide channel; each second light guide channel guides the received light to the corresponding second photoelectric converter.

[0110] S4. Based on the light received by the second photoelectric converter, determine the state of the number wheel 2, and determine the measurement information of the current target number wheel 2 based on the determination result.

[0111] In this embodiment, taking the example that at most five detection light paths can be formed between the light guide emitting elements and the light guide receiving elements on both sides of the target number wheel 2, the detection light path passing through the light hole of the number wheel 2 is regarded as "1", and the detection light path being blocked by the number wheel 2 is regarded as "0", then the five detection light paths can theoretically form at most thirty-two combination signals, such as: (0,0,0,0,0), (0,0,0,0,1), (0,0,0,1,0), (0,0,0,1,1), (0,0,1,0,0), (0,0,1,0,1), (0,0,1,1,0), (0,0,1,1,0), (0,0,1,1,1), ..., (0,1,1,1,1), (1,1,1,1,1); each of the above groups of signals represents a state of the number wheel 2, so that the state of the number wheel 2 can be deduced from the signal conditions.

[0112] Moreover, based on the number of metering information actually required by the number wheel 2, a corresponding number of combination signals can be selected to correspond to the metering signals of the number wheel 2, so as to obtain the metering information of the number wheel 2 through the above detection. Specifically, if the overall measurement adopts decimal system, and the number wheel 2 corresponds to ten metering information of "0-9", then ten of the above thirty-two combination signals are selected to correspond thereto, so as to obtain the metering information through detection. Thus, the metering information of the current target number wheel 2 can be determined based on the judgment structure of the state of the number wheel 2.

[0113] S5. Perform sequence judgment based on the detection sequence number of the current target number wheel 2, and return to step S1 or execute step S6 based on the judgment result.

[0114] Specifically, if the detection sequence number of the current target number wheel 2 is not the last one, the process returns to step S1 accordingly; if the detection sequence number of the current target number wheel 2 is the best one, step S6 is executed.

[0115] S6. Output the measurement result based on the measurement information corresponding to each target number wheel 2.

[0116] Among them, the output measurement result is associated with the division value corresponding to each number wheel 2. If the division values ​​of the first round, the second round, the third round and the fourth round are 0.1, 1, 10, and 100 respectively, then the output measurement result N=0.1n1+n2+10n3+100n4; wherein n1 represents the measurement value of the first round, n2 represents the measurement value of the second round, n3 represents the measurement value of the third round, and n4 represents the measurement value of the fourth round.

[0117] The embodiment of the present application also discloses a smart meter head. The smart meter head includes a meter and the above-mentioned optical metering device, wherein the meter is a mechanical metering device, and a communication module is also connected to the processor. After the optical metering device obtains the metering result in the meter, the communication module can send the metering result to the corresponding receiving terminal for viewing, thereby achieving the purpose of remote meter reading.

[0118] The above are all preferred embodiments of the present application, and the protection scope of the present application is not limited thereto. Therefore, any equivalent changes made according to the structure, shape, and principle of the present application should be included in the protection scope of the present application.

Claims

1. A light guide metering device, comprising a mounting frame (1), a plurality of number wheels (2) rotatably connected to the mounting frame (1), at least three light guide components connected to the mounting frame (1) and a processor, wherein the light guide components are arranged at intervals and the number wheels (2) are located between two adjacent light guide components, and the number wheels (2) are provided with light through holes, characterized in that: The processor is connected to photoelectric conversion components whose number is the same as the number of light guide components and corresponds one to one, and the photoelectric conversion components include a plurality of photoelectric converters; the light guide components at both ends of the plurality of light guide components arranged at intervals are single-sided light guide components (4), and the light guide component (5) between the two single-sided light guide components (4) is double-sided light guide components; The single-sided light guide component (4) comprises a first main body and a plurality of single-sided light guide portions (42) arranged on the first main body and facing the same direction; the number of photoelectric converters in the photoelectric conversion component corresponding to the single-sided light guide component (4) is the same as the number of the single-sided light guide portions (42), and the first main body is provided with a first light guide column (41) which connects the photoelectric converters to the single-sided light guide portions (42) in a one-to-one correspondence; The double-sided light guide component (5) comprises a second main body and a plurality of double-sided light guide parts (52) arranged on the second main body and the same number as the single-sided light guide parts (42); the positions of the double-sided light guide parts (52) correspond one-to-one with the single-sided light guide parts (42); the double-sided light guide parts (52) have two light guide heads (521) facing away from each other; and the directions of the light guide heads (521) and the single-sided light guide parts (42) are both parallel to the arrangement direction of the light guide components; the number of photoelectric converters in the photoelectric conversion component corresponding to the double-sided light guide component (5) is the same as the number of the double-sided light guide parts (52); and the second main body is provided with a second light guide column (51) which corresponds one-to-one with the photoelectric converters and the double-sided light guide parts (52); The end of the first light guide column (41) facing away from the first light guide portion is provided with a light-transmitting portion for light to enter and exit, and the light-transmitting portion is used to align with the photoelectric converter; an end connecting strip (43) is provided between two adjacent first light guide columns (41), and the end connecting strip (43) is located at one end of the first light guide column (41) close to the light-transmitting portion; The optical guide metering device further comprises an optical guide fixing seat (3) for connecting the single-sided optical guide component (4) and the double-sided optical guide component (5) to the mounting frame (1), the optical guide fixing seat (3) comprising a fixing base (31) and a limiting end plate (32); the mounting frame (1) is provided with an embedding opening (13) for embedding the fixing base (31), the fixing base (31) is provided with a through hole (311), and the side of the single-sided optical guide component (4) having the single-sided light guide portion (42) and the side of the double-sided optical guide component (5) having the double-sided light guide portion (52) can extend from the through hole (311) into the mounting frame (1); The one-sided light guide assembly (4) has an end connecting strip (43) at one end thereof as a limiting end, and the fixed base (31) is provided with a receiving groove (312) which is connected to the through hole (311) and is used to receive the limiting end; a groove wall of the receiving groove (312) is provided with a limiting groove (313), and the end connecting strip (43) is provided with a limiting strip (431) which can be embedded in the limiting groove (313); The limiting end plate (32) is used to cover the accommodating groove (312), and the limiting end plate (32) is provided with a clamping groove (321) matched with the limiting end, and the bottom of the clamping groove (321) is provided with a light path through hole (322) corresponding to the light-transmitting portion of the first light guide column (41); A middle connecting strip (44) is provided between two adjacent first light guide columns (41), and the middle connecting strip (44) is located in the middle of the first light guide columns (41); A folding piece (33) matched with the double-sided light guide assembly (5) is provided on one side of the fixed base (31) away from the limiting end plate (32), and the position of the folding piece (33) corresponds to the middle connecting strip (44); the folding piece (33) comprises two branches (331) and an end strip (332) connected between the two branches (331); the two branches (331) of the folding piece (33) are located on both sides of the through hole (311), and the distance between the two branches (331) and the side walls thereof gradually decreases in a direction close to the end strip (332); The end bar (332) is located at the end of the support bar (331) away from the fixed base (31), and an inclined pressing surface (333) is provided at the connection between the end bar (332) and the support bar (331), and an inclined pressure surface (441) is provided at the edge of the middle connecting bar (44) away from the limiting end, and the inclined pressing surface (333) is used to press against the inclined pressure surface (441) so that the two single-sided light guide components (4) in the double-sided light guide component (5) maintain a fitted state.

2. The optical guide metering device according to claim 1, characterized in that: The single-sided light guide component (4) and the double-sided light guide component (5) are both integrally formed, and one end of the first light guide column (41) is connected to the single-sided light guide portion (42), and the other end is provided with a first light-transmitting portion (411) corresponding to the photoelectric converter; one end of the second light guide column (51) is connected to the double-sided light guide portion (52), and the other end is provided with a second light-transmitting portion (511) corresponding to the photoelectric converter.

3. The optical guide metering device according to claim 1, characterized in that: The single-sided light guide component (4) is integrally formed, and the plurality of first light guide columns (41) in the single-sided light guide component (4) are linearly arranged, and the plurality of first light guide columns (41) are arranged symmetrically on the left and right; the double-sided light guide component (5) is formed by splicing two single-sided light guide components (4), and the single-sided light guide portions (42) in the two spliced ​​single-sided light guide components (4) face opposite directions to form a double-sided light guide portion (52).

4. The optical guide metering device according to claim 3, characterized in that: The first light guide columns (41) in the two single-sided light guide components (4) are bonded together to form a second light guide column (51), and the bonding surface of the first light guide column (41) is provided with a vertical convex strip (412) and a vertical groove (413) along its length direction, the vertical convex strip (412) and the vertical groove (413) are located on both sides of the bonding surface, and the side of the surface of the vertical convex strip (412) close to the middle area of ​​the first light guide column (41) is a smooth light-transmitting surface, and the other side is a rough surface; the groove wall of the vertical groove (413) is a smooth light-transmitting surface; when the two first light guide columns (41) are bonded together, the vertical convex strip (412) is embedded in the vertical groove (413).

5. The optical guide metering device according to claim 4, characterized in that: A gap light blocking component is provided at the bonding surface of the two first light guiding columns (41) in the second light guiding column (51), the gap light blocking component is located at one end of the second light guiding column (51) away from the double-sided light guiding portion (52), and the gap light blocking component comprises a transverse convex strip (414) and a transverse groove (415) provided on the first light guiding column (41) and matching with each other; The side of the outer surface of the transverse convex strip (414) facing away from the single-sided light guide portion (42) is a smooth light-transmitting surface, and the other side is a rough surface, and the transverse groove (415) is a smooth light-transmitting surface; when two of the first light guide columns (41) are attached to form a second light guide column (51), the transverse convex strip (414) is embedded in the transverse groove (415).

6. The optical guide metering device according to claim 5, characterized in that: The number of first light guide columns (41) in the single-sided light guide assembly (4) is an even number, the transverse convex strip (414) is provided on one of two symmetrically arranged first light guide columns (41), and the transverse groove (415) is provided on the other; Alternatively, the number of first light guide columns (41) in the single-sided light guide component (4) is an odd number, a transverse ridge (414) and a transverse groove (415) are provided on the center of the first light guide column (41), and the positions of the transverse ridge (414) and the transverse groove (415) are symmetrically arranged; one of the two symmetrically arranged first light guide columns (41) has a transverse ridge (414), and the other has a transverse groove (415).

7. A measuring method, characterized in that: The optical guide metering device as claimed in any one of claims 1 to 6 comprises the following steps: S1. Determine the target number of rounds based on the detection order (2); S2, based on the target number wheel (2), determine the light guide emitting element and the light guide receiving element, and determine a plurality of first photoelectric converters based on the light guide emitting element, and determine a plurality of second photoelectric converters based on the light guide receiving element; wherein the light guide emitting element is one of the two light guide components on both sides of the target number wheel (2), and the light guide receiving element is the other; the light guide emitting element has a plurality of independent first light guide channels, each of which corresponds to the first photoelectric converter, and the light guide receiving element has a plurality of independent second light guide channels, each of which corresponds to the second photoelectric converter; the emitting end of the first light guide channel corresponds to the receiving end of the second light guide channel; S3, sending luminous signals to the plurality of first photoelectric converters one by one, so that, The plurality of first photoelectric converters emit light to the corresponding first light guide channels one by one; Each first light guide channel guides the light one by one and directs the light that is not blocked by the target number wheel (2) to the corresponding second light guide channel; Each second light guide channel guides the received light to the corresponding second photoelectric converter; S4, based on the light received by the second photoelectric converter, performing a state judgment of the number wheel (2), and based on the judgment result, determining the metering information of the current target number wheel (2); S5, making a sequence judgment based on the detection sequence number of the current target number round (2), and returning to step S1 or executing step S6 based on the judgment result; S6. Outputting the measurement result based on the measurement information corresponding to each target number wheel (2).

8. A smart meter head, characterized in that: It comprises the optical guide metering device and meter as described in any one of claims 1 to 6, wherein the meter is a mechanical meter, and the processor is connected to a communication module.

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