A meter flow information acquisition device with a rotating single-reflector surface

Abstract

A kind of meter flow information acquisition device of rotating single reflecting surface, comprising: dynamic reflective code disc, static reflective disc and collector, only one circle of reflecting surface is used on the rotating dynamic reflective code disc, under the premise of guaranteeing the requirement of reflective function, the size of dynamic reflective code disc can be reduced, the starting amount and inertia of dynamic reflective code disc when rotating are reduced, the sensitivity and accuracy of meter are improved, and the reflective efficiency is guaranteed by using total reflecting surface to reflect light.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of flow information acquisition of a meter, in particular to a meter flow information acquisition device with a single rotating reflective surface. BACKGROUND

[0002] At present, a reflective light code disc of a meter flow information acquisition system based on the reflective light code disc has two circles of reflective surfaces around a rotating shaft. The two circles of reflective surfaces rotate together with the reflective light code disc to cause regular changes in reflected light. The flow information of the meter is obtained by monitoring the changes in the reflected light.

[0003] The above-mentioned reflective light code disc needs to accommodate two circles of reflective surfaces, and thus the size of the disc surface of the reflective light code disc cannot be made very small. Compared with the original pointer of the meter, the reflective light code disc is large and heavy, has a large initial movement and inertia, increases the initial flow of the meter, and reduces the sensitivity and accuracy of the meter. SUMMARY

[0004] According to the embodiments of the present application, a meter flow information acquisition device with a single rotating reflective surface is provided to reduce the initial movement and inertia when the reflective light code disc rotates, and improve the sensitivity and accuracy of the meter. The technical solution is that the meter flow information acquisition device with a single rotating reflective surface mainly includes a dynamic reflective light code disc, a static reflective light disc, and an acquisition device. The dynamic reflective light code disc is composed of a light-transmitting disc mirror and a light-blocking disc base. The disc mirror of the dynamic reflective light code disc has a full reflective surface around the rotating shaft of the base. The static reflective light disc is composed of a light-transmitting disc mirror and a light-blocking protective shell. The disc mirror of the static reflective light disc also has a full reflective surface around the central shaft. The emitted light of the acquisition device enters the reflective surface of the static reflective light disc after being reflected by the reflective surface of the static reflective light disc, and the light is further reflected by the reflective surface of the dynamic reflective light code disc and enters the photosensitive element of the acquisition device. The rotation of the dynamic reflective light code disc can cause regular changes in the reflected light. The acquisition device obtains the flow information of the meter by sensing the changes in the reflected light.

[0005] The above-mentioned meter flow information acquisition device with a single rotating reflective surface, the disc mirror of the dynamic reflective light code disc is made of transparent plastic or glass, and the optical critical angle is less than 45 degrees. The reflective surface of the dynamic reflective light code disc is a conical surface with an angle of 45 degrees with the rotating shaft of the disc base. The disc base is made of black plastic. The disc mirror is fixed on the disc base, and a completely sealed cavity for protecting the reflective surface is formed between the disc mirror and the disc base. The disc base is fixed on the rotating shaft of the pointer of the meter with a flow indication function, and can rotate together with the rotating shaft. The changes in the reflected light are controlled by the cooperation of the disc mirror reflective surface and the light-blocking block of the disc base.

[0006] The rotating single-reflection surface meter flow information acquisition device, the disc mirror of the static reflection disc is made of transparent plastic or glass material, the optical critical angle is less than 45 degrees, the reflection surface of the disc mirror is a conical surface with an angle of 45 degrees with the central axis of the static reflection disc, the protective shell is made of light-proof plastic material, and a cavity for protecting the reflection surface is formed between the protective shell and the disc mirror. The inner diameter of the static reflection disc is slightly larger than the outer diameter of the dynamic reflection code disc, the static reflection disc and the dynamic reflection code disc are coaxially arranged, the static reflection disc is fixed on the meter dial surface, and the dynamic reflection code disc can freely rotate in the static reflection disc. The center of the reflection surface of the static reflection disc and the center of the reflection surface of the dynamic reflection code disc are consistent in height relative to the meter dial surface, and the two reflection surfaces are perpendicular to each other in the same axial direction.

[0007] The rotating single-reflection surface meter flow information acquisition device, the collector emits collimated and uniform luminosity incident light parallel to the rotating shaft of the dynamic reflection code disc, the incident light irradiates the reflection surface of the static reflection disc at a certain axial direction, the incident light is reflected by the reflection surface of the static reflection disc to the reflection surface of the dynamic reflection code disc or the light-blocking block on the disc base, the light irradiated on the reflection surface of the dynamic reflection code disc is reflected again and enters the photosensitive device of the collector, and the light irradiated on the light-blocking block of the disc base is blocked or absorbed by the light-blocking block.

[0008] The rotating single-reflection surface meter flow information acquisition device, the reflection light change is controlled through the cooperation of the reflection surface of the disc mirror of the dynamic reflection code disc and the light-blocking block of the base, and the specific configuration is determined according to the reflection light change requirement; the number and arrangement position of the light-emitting element and the photosensitive element are determined according to the collection accuracy requirement; and the light-emitting element and the photosensitive element can be interchanged in position according to the reversibility of the light path.

[0009] The rotating single-reflection surface meter flow information acquisition device, the collector is located directly above the dynamic reflection code disc and the static reflection disc, the vertical projection of the collector on the meter dial surface is not less than the static reflection disc surface, the collector shell and the static reflection disc protective shell jointly block external light, and external light is prevented from entering the photosensitive device of the collector.

[0010] The rotating single-reflection surface meter flow information acquisition device, the incident light occurs optical total reflection phenomenon on the reflection surface of the dynamic reflection code disc and the reflection surface of the static reflection disc, the reflection efficiency is high, the collector emits low-intensity incident light to meet the sensing requirement of the photosensitive element, and the power consumption is low. The gap between the dynamic reflection code disc and the static reflection disc is uniform, the gap between the dynamic reflection code disc and the static reflection disc and the meter dial glass is uniform, and the transparent liquid filled in the uniform gap does not change the light path and does not affect the collection of the meter flow information. Advantages

[0011] The technical scheme provided by the embodiment of the present application has only one circle of reflecting surface on the disc mirror of the dynamic reflecting code disc, and the size of the dynamic reflecting code disc can be reduced under the premise of guaranteeing the reflecting function requirement, the starting amount and the inertia of the dynamic reflecting code disc during rotation are reduced, and the sensitivity and the accuracy of the meter are improved.

[0012] The details of embodiments of the application are presented in the following drawings and description. Other features, objects, and advantages of the application will be apparent from the description, drawings, and claims. Of course, any product or method that implements the application need not necessarily exhibit all of the advantages described above. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings needed in the embodiment description will be briefly introduced below. Obviously, the drawings in the following description are only some embodiments of the present application, and other embodiments can also be obtained by those skilled in the art according to these drawings.

[0014] Figure 1 The cross-sectional structure diagram of the flow information acquisition device of the meter with rotating single reflecting surface according to the present application.

[0015] Figure 2 The exploded structure diagram of the dynamic reflecting code disc and the static reflecting disc of the flow information acquisition device of the meter with rotating single reflecting surface according to the present application.

[0016] Figure 3 The exploded structure diagram of the dynamic reflecting code disc of the flow information acquisition device of the meter with rotating single reflecting surface according to the present application.

[0017] Figure 4 The exploded structure diagram of the static reflecting disc of the flow information acquisition device of the meter with rotating single reflecting surface according to the present application.

[0018] Figure 5 The reflection light path diagram of the reflecting surface of the flow information acquisition device of the meter with rotating single reflecting surface according to the present application.

[0019] Figure 6 The light emission irradiation area and sensing area diagram of the collector of the flow information acquisition device of the meter with rotating single reflecting surface according to the present application.

[0020] Figure 7 The dynamic reflecting code disc of the flow information acquisition device of the meter with rotating single reflecting surface according to the present application.

[0021] Reference numerals: 1. rotation shaft, 2. disc seat, 3. scale disc, 4. protective shell, 5. first disc mirror, 6. watch glass, 7. collector shell, 8. light adjusting lens, 9. light sensing element, 10. light emitting element, 11. second disc mirror, 12. light blocking block, 13. first cavity, 14. second cavity, 15. first reflecting surface, 16. second reflecting surface, 17. sensing area, 18. first irradiation area, 19. second irradiation area. DETAILED DESCRIPTION

[0022] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art based on the present application belong to the scope of the present application.

[0023] At present, a reflective code disc of a meter flow information acquisition system based on the reflective code disc has two circles of reflecting surfaces surrounding the rotation shaft. The two circles of reflecting surfaces rotate together with the reflective code disc to cause regular changes of reflected light. The flow information of the meter is obtained by monitoring the changes of the reflected light. The reflective code disc needs to accommodate two circles of reflecting surfaces, and the size of the disc surface of the reflective code disc cannot be made very small. Compared with the original pointer of the meter, the reflective code disc is large and heavy, has a large initial movement and self inertia, increases the initial flow of the meter, and reduces the sensitivity and accuracy of the meter.

[0024] Therefore, the present application provides a rotating single reflecting surface meter flow information acquisition device. Specifically, the technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application.

[0025] The rotating dynamic reflective code disc of the present application only needs one circle of reflecting surfaces. Under the premise of ensuring the reflective function requirement, the size of the dynamic reflective code disc can be reduced, the initial movement and self inertia of the dynamic reflective code disc during rotation are reduced, the sensitivity and accuracy of the meter are improved, and the full reflecting surface is used to reflect light to ensure the reflective efficiency.

[0026] As shown in FIG. 1, the meter flow information acquisition device comprises a rotation shaft 1, a disc seat 2, a scale disc 3, a protective shell 4, a first disc mirror 5, a watch glass 6, a collector shell 7, a light adjusting lens 8, a light sensing element 9, a light emitting element 10, a second disc mirror 11, a light blocking block 12, a first cavity 13, a second cavity 14, a first reflecting surface 15, a second reflecting surface 16, a sensing area 17, a first irradiation area 18, and a second irradiation area 19. Figure 1As shown in the figure, a rotating single-reflector meter flow information acquisition device mainly includes three parts: a dynamic reflective code disc, a static reflective disc and an acquisition device. The dynamic reflective code disc is composed of a light-transmitting second disc mirror (11) and a black light-proof disc seat (2); the static reflective disc is composed of a light-transmitting first disc mirror (5) and a light-proof protective shell (4), and the static reflective disc is fixed on a meter dial (3); the acquisition device is mainly composed of an acquisition device shell (7), a light-adjusting lens (8), a photosensitive element (9) and a light-emitting element (10), and the acquisition device is fixed on a watch glass (6) above the dynamic reflective code disc and the static reflective disc. The dynamic reflective code disc is fixed on a rotating shaft (1) of the meter with a flow indication function, and rotates with the rotating shaft (1). The emitted light of the light-emitting element (10) of the acquisition device is reflected by the first disc mirror (5) and the second disc mirror (11) and reaches the photosensitive element (9) through the light-adjusting lens (8). The regular change of the reflected light caused by the rotation of the dynamic reflective code disc is sensed by the acquisition device to obtain the flow information of the meter.

[0027] As shown in the figure, Figure 2 The static reflective disc is in the shape of a ring, and the dynamic reflective code disc is arranged in the static reflective disc. The inner diameter of the static reflective disc is larger than the outer diameter of the dynamic reflective code disc. The dynamic reflective code disc and the static reflective disc are coaxially arranged, and the dynamic reflective code disc can freely rotate in the static reflective disc.

[0028] As shown in the figure, Figure 3 The dynamic reflective code disc is composed of the disc seat (2) and the second disc mirror (11). The disc seat (2) has a light-blocking block (12), and the light-blocking block (12) and the second disc mirror (11) are tightly matched to form a circular dynamic reflective code disc surface.

[0029] As shown in the figure, Figure 4 The static reflective disc is composed of the protective shell (4) and the first disc mirror (5), and the protective shell (4) and the first disc mirror (5) are tightly matched to form a circular ring-shaped static reflective disc surface.

[0030] As shown in the figure, Figure 5 The first disc mirror (5) and the second disc mirror (11) are made of polycarbonate transparent plastic by injection molding. The optical critical angle of polycarbonate is about 41 degrees. The first reflecting surface (15) around the central rotating shaft (1) is a conical surface with an angle of 45 degrees with the rotating shaft (1). The second reflecting surface (16) around the central rotating shaft (1) is a conical surface with an angle of 45 degrees with the rotating shaft (1). The first reflecting surface (15) and the second reflecting surface (16) at the same azimuth angle of the central rotating shaft (1) are perpendicular to each other. The incident light parallel to the central rotating shaft (1) undergoes total reflection on the first reflecting surface (15) and the second reflecting surface (16) in turn. The disc surface of the first disc mirror (5) and the disc surface of the second disc mirror (11) are perpendicular to the central rotating shaft (1).

[0031] As shown in the figure, Figure 5As shown, the disc seat (2) is black ABS plastic material, the outer surface is matte black, the disc seat (2) and the second disc mirror (11) are tightly matched to form a completely sealed second cavity (14); the protective shell (4) is black ABS plastic material, the outer surface is matte black, the protective shell (4) and the first disc mirror (5) are tightly matched to form a completely sealed first cavity (13), the first cavity (13) and the second cavity (14) protect the first reflecting surface (15) and the second reflecting surface (16), prevent liquid and impurities from contacting the reflecting surface to cause the optical total reflection phenomenon to fail, and in addition, the first reflecting surface (15) and the second reflecting surface (16) can be protected from being abraded or affected by other external environments; the protective shell (4) blocks external horizontal external light from entering the first disc mirror (5) and the second disc mirror (11).

[0032] As shown, Figure 5 As shown, the collimated light emitted by the light emitting element (10) irradiates the first reflecting surface (15) at an incident angle of 45° parallel to the rotation shaft (1), the optical critical angle of the polycarbonate material first disc mirror (5) and the second disc mirror (11) is about 41°, the incident angle is greater than the critical angle, the disc mirror (5) is a high-density medium, and the external cavity (13) of the first reflecting surface (15) is a low-density medium, so that the incident light a undergoes total reflection of light at the first reflecting surface (15). The included angle between the first reflecting surface (15) and the second reflecting surface (16) is 90°, so it can be known that the incident angle of the reflected light to the second reflecting surface (16) is 45°, which is greater than the critical angle of the second disc mirror (5), the external cavity (14) of the second reflecting surface (16) is a low-density medium, and the reflected light undergoes total reflection of light at the second reflecting surface (16). Finally, the light a is emitted from the disc surface of the second disc mirror (11) parallel to the rotation shaft (1). Similarly, the incident light b undergoes total reflection at the first reflecting surface (15), and the reflected light is vertically irradiated to the light blocking block (12). Because the outer surface of the light blocking block (12) is matte black, the light b is blocked and absorbed by the light blocking block (12). The light blocking block (12) can also be replaced by a black coating.

[0033] As shown, Figure 5 As shown, the width of the first reflecting surface (15) is greater than the maximum width of the second reflecting surface (16), and the incident angles of the irradiation light a and the irradiation light b are greater than the critical angle 4° of the first disc mirror (5) and the second disc mirror (11), so that in industrial applications, the incident angle of the collimated incident light of the light emitting element (10) to the first reflecting surface (15) can exist a small amount of assembly error, and the included angle between the first reflecting surface (15) and the second reflecting surface (16) and the rotation shaft (1) can exist a small amount of machining error, as long as the effective light emitted by the light emitting element (10) can enter the photosensitive element (9) after undergoing total reflection at the first reflecting surface (15) and the second reflecting surface (16) in turn.

[0034] AsFigure 6 As shown, the embodiment uses two light emitting elements (10) to respectively emit collimated and luminosity uniform incident light parallel to the rotation axis (1), which respectively irradiate the first reflecting surface (15) in the same central axis azimuth angle, and form the first irradiation area (18) and the second irradiation area (19) on the first reflecting surface (15), the circular diameter of the first irradiation area (18) and the second irradiation area (19) is greater than the annular width of the vertical projection of the first reflecting surface (15) on the disc surface, and the included angle of the first irradiation area (18) and the second irradiation area (19) around the rotation axis (1) is 90 degrees. After the incident light is reflected by the first reflecting surface (15), the light to the second reflecting surface (16) will be reflected again in the direction opposite to the incident light, and the light to the light blocking block (12) will be blocked or absorbed. The sensing area (17) of the photosensitive element (9) is not less than the disc surface of the moving reflective code disc.

[0035] The two light emitting elements (10) emit light alternately, and the photosensitive element (9) respectively senses the reflected light intensity of the two light emitting elements (10) reflected by the second disc mirror (11), and the number of revolutions, the rotation speed and the forward and reverse direction of the code disc can be obtained as Figure 7 the light intensity change diagram shown in the figure, according to the regular change of the reflected light, the number of revolutions, the rotation speed and the forward and reverse direction of the code disc are obtained, and further the cumulative flow, the instantaneous flow and the forward and reverse state of the meter are known. According to the embodiment, it is conceivable that when the number of light emitting elements is unchanged, 2 second disc mirrors (11) and 2 light blocking blocks (12) are uniformly arranged on the circumference of the moving reflective code disc, the maximum circumferential included angle of the first irradiation area (18) and the second irradiation area (19) is less than 90 degrees, and the collection accuracy of the collector is 1 / 2 revolution; when 3 second disc mirrors (11) and 3 light blocking blocks (12) are arranged, the maximum circumferential included angle of the first irradiation area (18) and the second irradiation area (19) is less than 60 degrees, and the collection accuracy is 1 / 3 revolution, and the specific number of disc mirrors and light blocking blocks and the accuracy can be deduced accordingly. In addition, it is conceivable to use one second reflecting surface (11) and one light blocking block (12), the circumferential angle of the second reflecting surface (11) is greater than the circumferential angle of two irradiation areas and less than the circumferential angle of three irradiation areas, and when four irradiation areas are uniformly arranged on the circumference, the collection accuracy is 1 / 4 revolution; when 10 irradiation areas are arranged, the collection accuracy is 1 / 10 revolution, so the specific number of second reflecting surface (11), light blocking block (12) and light emitting element (10) is flexibly selected according to the requirement of collection accuracy.

[0036] The collector shell (7) is adhered to the dial glass (6) above the code disc by UV light adhesive, the collector shell (7) is made of 304 stainless steel, the vertical projection of the collector shell (7) on the disc surface is greater than the maximum outer diameter of the protective shell (4), the collector shell (7) and the protective shell (4) jointly shield external light, external light cannot enter the photosensitive element (9), and external light interference is avoided. The gap between the first disc mirror (5) and the second disc mirror (11) and the dial glass (6) is uniform, when the gap is filled with transparent liquid, the light path is not affected, the collection of reflected light is not affected, the gap between the first disc mirror (5) and the second disc mirror (11) is uniform, when the gap is filled with transparent liquid, the light path is not changed, and the collection of flow data is not affected.

[0037] The second disc mirror (11) of the rotating dynamic light-reflecting code disc only needs one circle of second reflecting surface (16), under the premise of ensuring the light-reflecting function requirement, the size of the dynamic light-reflecting code disc can be reduced, the starting amount and inertia of the dynamic light-reflecting code disc during rotation are reduced, and the sensitivity and accuracy of the meter are improved, the first disc mirror (5) and the second disc mirror (11) use full reflecting surface, the light-reflecting efficiency is high, the light-emitting element (10) emits incident light with very low intensity, which can meet the sensing requirement of the photosensitive element (9), low-intensity light is used to reduce the collection power consumption, the first reflecting surface (15) and the second reflecting surface (16) are sealed and protected, and are not easily affected by the external environment, and are long and reliable.

Claims

1. A flow information acquisition device for a rotating single-reflective meter, characterized in that: It mainly consists of three parts: a moving reflective code disk, a static reflective optical disk, and a data acquisition unit. The moving reflective code disk is composed of a light-transmitting mirror and an opaque base. The mirror of the moving reflective code disk has a ring of total reflection surfaces around the base's rotation axis. The static reflective optical disk is composed of a light-transmitting mirror and an opaque protective shell. The mirror of the static reflective optical disk also has a ring of total reflection surfaces around its central axis. The light emitted by the data acquisition unit is reflected by the reflective surface of the static reflective optical disk and then enters the reflective surface of the moving reflective code disk. The light emitted by the data acquisition unit is further reflected by the reflective surface of the moving reflective code disk and then enters the photosensitive element of the data acquisition unit. The rotation of the moving reflective code disk causes a regular change in the reflected light. The data acquisition unit obtains the flow information of the meter by sensing this change in the reflected light.

2. The flow information acquisition device for a rotating single-reflective surface meter according to claim 1, characterized in that: The reflector of the moving reflective code disk is made of transparent plastic or glass with an optical critical angle of less than 45 degrees. The reflective surface of the moving reflective code disk is a conical surface at a 45-degree angle to the disk base rotation axis. The disk base is made of black plastic, and the reflector is fixed on the disk base. A completely sealed cavity is formed between the reflector and the disk base to protect the reflective surface. The disk base is fixed on the pointer rotation axis of the meter with flow indication function and rotates with the rotation axis. The change of reflected light is controlled by the interaction between the reflective surface of the reflector and the light blocking block of the disk base.

3. The flow information acquisition device for a rotating single-reflective surface meter according to claim 1, characterized in that: The mirror of the static reflective optical disc is made of transparent plastic or glass with an optical critical angle of less than 45 degrees. The reflective surface of the mirror is a conical surface at a 45-degree angle to the central axis of the static reflective optical disc. The protective shell is made of opaque plastic. A completely sealed cavity is formed between the protective shell and the mirror to protect the reflective surface. The inner diameter of the static reflective optical disc is slightly larger than the outer diameter of the moving reflective code disc. The static reflective optical disc and the moving reflective code disc are arranged coaxially. The static reflective optical disc is fixed on the scale of the measuring instrument. The moving reflective code disc can rotate freely inside the static reflective optical disc. The center of the reflective surface of the static reflective optical disc and the center of the reflective surface of the moving reflective code disc are at the same height relative to the scale of the measuring instrument. The two reflective surfaces are perpendicular to each other in the azimuth angle along the same axis.

4. The flow information acquisition device for a rotating single-reflective surface meter according to claim 1, characterized in that: the collector... The system emits collimated and uniform incident light parallel to the axis of the moving reflective code disk. This incident light illuminates the reflective surface of the stationary reflective optical disk at a specific axial azimuth angle. The incident light is reflected by the reflective surface of the stationary reflective optical disk to the reflective surface of the moving reflective code disk or a light-blocking block on the disk base. The light illuminating the reflective surface of the moving reflective code disk is reflected again and enters the photosensitive device of the collector. The light illuminating the light-blocking block on the disk base is blocked or absorbed by the light-blocking block. The variation of the reflected light is controlled by the interaction between the reflective surface of the moving reflective code disk and the light-blocking block on the base. The specific configuration is determined based on the requirements for the variation of the reflected light. The number and arrangement of the light-emitting and photosensitive elements are determined based on the required acquisition accuracy. Due to the reversibility of the optical path, the positions of the light-emitting and photosensitive elements can be interchanged.

5. The flow information acquisition device for a rotating single-reflective surface meter according to claim 1, characterized in that: the collector... Located directly above the dynamic reflective code disk and the static reflective optical disk, the collector housing and the static reflective optical disk protective shell together block external light, preventing external light from entering the collector's photosensitive device.

6. The flow information acquisition device for a rotating single-reflective surface meter according to claim 1, characterized in that: The incident light undergoes total internal reflection on the reflective surfaces of the moving reflective code disk and the stationary reflective optical disk. The gap between the moving reflective code disk and the stationary reflective optical disk is uniform, as is the gap between the moving reflective code disk and the stationary reflective optical disk and the glass of the meter dial. The uniform gap filled with transparent liquid will not change the light path and will not affect the acquisition of flow information from the meter.

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