CN219737773U - Height measuring device and height measuring system - Google Patents

Abstract

The utility model discloses a height measuring device and a height measuring system, wherein the height measuring device comprises a light source array, a plurality of light sources and a height measuring system, wherein the light source array comprises a plurality of light sources integrated on a light source mounting plate, each light source is used for emitting measuring light rays to a corresponding measured object, so that the measured object can generate reflected light rays according to the measuring light rays; and a detector array comprising a plurality of detectors integrated on a detector mounting plate, wherein each of the detectors is configured to receive reflected light generated by a corresponding object under test, so as to measure the height of the object under test based on the measured light and the reflected light. According to the scheme, the integrated arrangement of the light sources and the detectors can enable the thickness of the height measuring device and the thickness of the height measuring system to be reduced under the condition that the requirements of transverse resolution are met, and then the problem that the two cannot be considered is solved.

Description

Height measuring device and height measuring system

Technical Field

The present utility model relates generally to the field of height measurement technology. More particularly, the present utility model relates to a height measurement device and a height measurement system.

Background

When a fixed distance measuring sensor is used to measure the height (or thickness) of a moving object, the single sensor cannot accurately measure the accurate height (or thickness) of each position or each measured object of the measured object in the case that the length or the number of the measured objects are long or the shape is irregular.

To address this problem, multiple ranging sensors are often employed to measure together. When a plurality of ranging sensors are used for common measurement, in order to meet the requirement of resolution, each position on the measured object or the height (or thickness) of each measured object with minimum resolution as interval can be accurately measured, but the thickness of each ranging sensor cannot be too large, but the thickness of the current ranging sensors, such as laser ranging sensors, is relatively large, and the simple integration of the existing ranging sensors is difficult to meet the requirement.

In view of the foregoing, it is desirable to provide a height measuring device and a height measuring system, which can be configured to integrate a plurality of light sources and a plurality of detectors, so that the thickness of the light sources and the detectors can be reduced while meeting the requirement of lateral resolution, and thus the problem that both light sources cannot be compatible is solved.

Disclosure of Invention

In order to solve at least one or more of the technical problems mentioned above, the present utility model proposes, in various aspects, a height measuring device and a height measuring system.

In a first aspect, the present utility model provides a height measurement device comprising: a light source array including a plurality of light sources integrated on one light source mounting board, wherein each of the light sources is configured to emit measurement light to a corresponding object to be measured, so that the object to be measured generates reflected light according to the measurement light; and a detector array comprising a plurality of detectors integrated on a detector mounting plate, wherein each of the detectors is configured to receive reflected light generated by a corresponding object under test, so as to measure the height of the object under test based on the measured light and the reflected light.

In one embodiment, the light source comprises a point light source.

In one embodiment, the light source comprises an elliptical spot light source.

In one embodiment, the distance between the centers of any two adjacent detectors in the plurality of detectors is between 1 and 10 mm.

In one embodiment, a plurality of light sources in the array of light sources are arranged in a row, a plurality of detectors in the array of detectors are arranged in a row, and the resulting row of light sources and row of detectors are arranged in parallel.

In one embodiment, each of the plurality of light sources corresponds to one or more of the detectors.

In one embodiment, the height measurement device further comprises: a lens array comprising a plurality of lenses integrated on a lens mounting plate, wherein each of said lenses is disposed on the receiving light path of each of said detectors and is configured to: collecting reflected light generated by a measured target and focusing; and transmitting the focused light to a detector for reception thereof.

In one embodiment, the height measurement device further comprises: the light source array, the detector array and the lens array are all arranged in the shell.

In a second aspect, the present utility model also provides a height measurement system comprising: a measured object transporting device including a transporting belt for transporting a plurality of measured objects; and a height measuring device according to any embodiment of the first aspect, a light emitting end of each of the light sources in the height measuring device being arranged towards the conveyor belt; and a light receiving end of each of the detectors in the height measuring device is disposed toward the conveyor belt.

In one embodiment, the height measuring system includes a plurality of the height measuring devices arranged side by side, and an arrangement direction of the plurality of height measuring devices is perpendicular to a conveying direction of the conveying belt.

Through the height measuring device and the height measuring system provided by the above, the thickness of the height measuring device and the height measuring system can be reduced under the condition of meeting the requirement of transverse resolution through the integrated arrangement of a plurality of light sources and a plurality of detectors, and the problem that the two cannot be taken into consideration is solved.

Drawings

The above, as well as additional purposes, features, and advantages of exemplary embodiments of the present utility model will become readily apparent from the following detailed description when read in conjunction with the accompanying drawings. In the drawings, embodiments of the utility model are illustrated by way of example and not by way of limitation, and like reference numerals refer to similar or corresponding parts and in which:

FIG. 1 shows a schematic structural view of a height measurement device according to an embodiment of the present utility model;

a schematic structural diagram of a light source array according to an embodiment of the present utility model is shown in fig. 2;

a schematic structural diagram of a detector array according to an embodiment of the utility model is shown in fig. 3;

FIG. 4 shows a schematic structural view of a height measuring apparatus according to another embodiment of the present utility model;

FIG. 5 shows a front view of the height measurement device of FIG. 4;

FIG. 6 shows a schematic diagram of a lens array according to an embodiment of the utility model;

FIG. 7 shows a schematic diagram of a height measurement system according to an embodiment of the utility model;

fig. 8 shows a schematic structural diagram of a height measurement system according to an embodiment of the present utility model.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and fully with reference to the accompanying drawings, in which it is evident that the embodiments described are some, but not all embodiments of the utility model. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

It should be understood that the terms "comprises" and "comprising," when used in this specification and in the claims, specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

It is also to be understood that the terminology used in the description of the utility model herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the utility model. As used in the specification and claims, the singular forms "a", "an" and "the" are intended to include the plural forms as well, unless the context clearly indicates otherwise. It should be further understood that the term "and/or" as used in the present specification and claims refers to any and all possible combinations of one or more of the associated listed items, and includes such combinations.

As used in this specification and the claims, the term "if" may be interpreted as "when..once" or "in response to a determination" or "in response to detection" depending on the context. Similarly, the phrase "if a determination" or "if a [ described condition or event ] is detected" may be interpreted in the context of meaning "upon determination" or "in response to determination" or "upon detection of a [ described condition or event ]" or "in response to detection of a [ described condition or event ]".

Specific embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

Fig. 1 shows a schematic structure of a height measuring apparatus 100 according to an embodiment of the present utility model.

As shown in FIG. 1, a height measurement device 100 may include an array of light sources 101 and an array of detectors 102.

A schematic structure of a light source array 101 according to an embodiment of the present utility model is shown in fig. 2. As shown in fig. 2, the light source array 101 may include a plurality of light sources 1012 integrated on a light source mounting board 1011, wherein each light source 1012 is configured to emit measurement light toward a corresponding object to be measured, so that the object to be measured generates reflected light according to the measurement light. In one implementation, the light source mounting board 1011 may include a circuit board on which associated circuitry, such as power supply wiring, etc., that mates with the light source 1012 may be disposed. In one implementation, light source 1012 may include a point source of light, such as a laser light source. The point light sources are adopted as the light sources of the embodiment, so that the measuring light rays emitted by each light source are perpendicular to the bearing plane of the measured object, the situation that the adjacent objects with smaller height are shielded by the objects with larger height at the edge view field is avoided, and the problem that the heights of part of the measured objects cannot be measured or are not measured accurately is further prevented.

In addition, light source 1012 may comprise an elliptical spot light source, such as an elliptical spot laser. Such a light source may correspond to two or more points to be measured and thus to two or more detectors. In other words, the light source generates a larger light spot area when the light source is equal to the light emitting end of other types of light sources, so that more objects to be measured can be irradiated in the long axis direction of the ellipse, and the shielding at the edge view field can be better prevented. Based on this, the irradiation of the object to be measured can be performed with a smaller number of light sources, so that the volume of the height measuring device can be reduced and the cost thereof can be reduced. It will be appreciated that the light source 1012 may also employ, for example, a circular spot light source, etc., based on different application scenarios.

Based on different requirements, the light source 1012 can be connected with the light source mounting board 1011 by adopting various connection modes, for example, adopting fixed connection such as welding and riveting with more firm connection or detachable connection modes such as plugging, clamping and bonding which are convenient to detach.

The plurality of light sources 1012 in the light source array 101 may be arranged in various forms, for example, in a row. The array of light sources in one row can measure a row of stationary objects to be measured and can measure a plurality of rows of objects to be measured on a moving platform (such as a conveyor belt), and the array is simple and can be suitable for measuring objects to be measured in various arrangements. In another embodiment, the plurality of light sources 1012 in the light source array 101 may be arranged in other forms of arrays, such as regular or irregular shapes, such as rectangular or diamond shapes.

Based on different application scenarios, the above-mentioned one object to be measured may include a single object to be measured (for example, an ore particle) or a position or a region of one object to be measured (for example, a position or a region on a larger object), etc., and the object to be measured may be in a regular shape (for example, square, circular or oval) or an irregular shape.

The shape, structure, arrangement, etc. of the light sources are described above in connection with the embodiments, and the present solution will be described further below with respect to the detector array 102.

A schematic structural diagram of a detector array 102 in accordance with an embodiment of the utility model is shown in fig. 3.

As shown in fig. 3, the detector array 102 may include a plurality of detectors 1022 integrated on a detector mounting board 1021, wherein each detector 1022 is configured to receive reflected light generated by a corresponding target under test, so as to measure the height of the target under test based on the measured light and the reflected light.

In one implementation, the detector mounting board 1021 may include a circuit board on which associated circuitry that mates with the detector 1022 may be disposed, such as when the detector 1022 is a photodetector, power supply circuitry or associated signal processing circuitry for the photodetector, and the like may be included. The type of detector 1022 may vary depending on the type of light source, for example, when the light source is a laser light source, the detector 1022 may include a laser detector. In addition, the detector 1022 may also be different according to the requirements of sensitivity, signal extraction manner and response time, and may be, for example, a CCD (charge coupled device) array detector, a CMOS (complementary metal oxide semiconductor) array detector or a PSD (position sensor).

Based on different requirements, the detector 1022 may be connected to the detector mounting board 1021 by a plurality of connection manners, for example, a fixed connection manner such as welding or riveting, or a detachable connection manner such as plugging, clamping and bonding, which is more firmly connected.

In another embodiment, the number of detectors 1022 may also be determined based on the number of light sources, e.g., one light source 1012 may correspond to one or more (e.g., two) detectors 1022.

It will be appreciated that the reflected light generated by the object under test based on the measurement light will mostly enter the detector at the location corresponding to the light source, and thus the arrangement of the detector 1022 may be the same as or similar to that of the light source 1012. For example, when the plurality of light sources 1012 in the light source array 101 are arranged in a row, the plurality of detectors 1022 in the detector array 102 may also be arranged in a row, and the resulting row of light sources and row of detectors are arranged in parallel. This structure can detect a plurality of objects to be detected arranged in a fixed row or on a conveyor belt, and can make each detector 1022 receive most of reflected light reflected by the objects to be detected, thereby detecting the height of each object to be detected, preventing missing detection or detection errors.

In order to have the same measurement reference for each object under test, and thus to facilitate distinguishing between the height differences of different objects under test, in one embodiment, the height of each light source 1012 from the bearing plane of the object under test may be equal, and the height of each detector 1022 from the bearing plane may also be equal. It will be appreciated that in addition to these factors, other parameter settings may be combined to ensure that different targets to be measured have the same measurement reference, and will not be described in detail herein.

To reduce the width of the detector array 102 (the length in the transverse overall width direction of all objects under test), and thus the thickness of the height measurement device 100, the distance between the centers of any two adjacent detectors 1022 of the plurality of detectors 1022 may be between 1 and 10mm in one embodiment, and may be 8mm in a preferred embodiment. Setting the distance between the detectors 1022 smaller may arrange more detectors in the lateral direction of the measured object (making the width of the light source array smaller than or equal to the width of the detector array), so that the lateral resolution of the measured object may be improved (i.e., more measured objects may be identified in the lateral direction of the measured object).

In the embodiment shown in fig. 1-3, the detector array 102 is shown to include four detectors 1022 arranged in a row, the light source array 101 includes two light sources 1012, and the two light sources 1012 and the row of detectors 1022 are arranged in parallel. In this embodiment, each light source 1012 corresponds to two detectors 1022, for example, the light source 1012 on the left side corresponds to two detectors 1022 on the left side in the drawing, the light source 1012 on the right side corresponds to two detectors 1022 on the right side, and the arrangement of each light source 1012 and detector 1022 may be any of the arrangements described above, which will not be described in detail herein.

At this time, assuming that the distance between the centers of any two adjacent detectors 1022 is 8mm, the width of the detector array 102 may be generally smaller than 40mm, and the thickness of the height measuring apparatus 100 may be also smaller than 40mm after being reasonably set, so that the multi-channel height measuring apparatus 100 may satisfy requirements of lateral resolution and thickness.

It can be seen that the integrated arrangement of the plurality of light sources 1012 and the plurality of detectors 1022 according to the embodiments of the present utility model allows the height measurement device 100 to have a reduced thickness while meeting the lateral resolution requirement, thereby solving the problem that both cannot be compatible.

In one embodiment, the height of the measured object may be determined by some known method based on the angle between the measuring light and the bearing plane of the measured object, the angle of reflection of the reflected light (angle to the vertical plane), and some other known parameter (e.g., the height difference between the detector and the light source, the mounting angle of the detector, etc.). In another embodiment, the height of the object to be measured can also be measured by some known method based on other parameters of the measured light and the reflected light, and can be specifically selected and used as needed.

Fig. 4 illustrates a schematic structure of a height measuring apparatus 400 according to another embodiment of the present utility model, and fig. 5 illustrates a front view of the height measuring apparatus 400 of fig. 4.

As shown in fig. 4 and 5, the height measurement device 400 may include a light source array 401, a detector array 402, and a lens array 403. The structure, arrangement, etc. of the light source array 401 and the detector array 402 may be referred to the description of the previous embodiments, and will not be described in detail here.

Fig. 6 shows a schematic diagram of the structure of a lens array 403 according to an embodiment of the present utility model. As shown in fig. 6, the lens array 403 may include a plurality of lenses 4032 integrated on a lens mounting plate 4031, wherein each lens 4032 is disposed on the receiving light path of each detector and collects and focuses reflected light generated by the object under test; and transmitting the focused light to a detector for reception thereof.

In one embodiment, the lens 4032 may include a focusing lens such as a convex lens. Each lens 4032 in the lens array 403 may correspond to a detector (i.e., the number of lenses 4032 may be the same as the number of detectors) so that the source energy may be concentrated as much as possible onto the detector through the lenses 4032 to obtain accurate measurements from the spot projected onto the detector. Based on this, the arrangement of the lens array 403 may be the same as or similar to the arrangement of the detector arrays, for example, when the detector arrays are arranged in a row, the lens array 403 may also be arranged in a row. In embodiments where the height measurement device 400 includes a row of light sources, a row of lenses 4032, and a row of detectors, the row of light sources, the row of lenses 4032, and the row of detectors may be arranged in parallel in a manner that provides the same measurement conditions for each object being measured disposed on the load bearing plane, thereby facilitating discrimination of height differences between different objects being measured.

Based on different requirements, the lens 4032 and the lens mounting plate 4031 can be connected by fixed connection such as welding and riveting or detachable connection such as plugging, clamping and bonding which are convenient to detach.

The lens 4032 is disposed on the light receiving path of the detector, so that the reflected light generated by the measured object can be focused on the detector to a greater extent, and a clearer light spot can be formed, so that the accurate height of the measured object can be obtained by some known methods according to the information (such as position) of the light spot, the object distance of the lens, the included angle between the optical axis of the light source and the optical axis of the lens, and the like.

In the embodiment shown in fig. 4 and 5, for convenience of use, the height measurement device 400 may further include a housing 404, where the light source array 401, the detector array 402, and the lens array 403 may be disposed in the housing 404, and the specific arrangement may be set as required, for example, the light source array 401 and the lens array 403 may be respectively located at two ends of the housing 404, and an included angle between an optical axis of each light source in the light source array 401 and an optical axis of each lens 4032 in the lens array 403 may be between 10 ° and 20 ° (an included angle between an outgoing light ray and a reflected light ray is between 10 ° and 20 °), preferably, 15 °, where the smaller included angle may form a clearer light spot on the detector, and more importantly, may make the height measurement device 400 compact. The detector may be disposed on the light-emitting path of the lens 4032, and the light-receiving surface (the surface that receives the reflected light) of the detector may be perpendicular to the main optical axis of the lens 4032 or form a non-zero included angle with the main optical axis, so that more reflected light may be received, and further a clear light spot may be formed on the detector, thereby obtaining the accurate height of the measured object.

In the embodiment shown in fig. 4 and 5, to protect the lens 4032, it may be embedded on the housing 404. The detector mounting plate may be disposed on the other side of the housing 404 corresponding to the lens array 403. In addition, to facilitate the reception of reflected light by the detector, a hollow transmission cavity 405 for transmission of reflected light may be formed between the detector array 402 and the lens array 403.

Fig. 7 shows a schematic structural diagram of a height measurement system 700 according to an embodiment of the utility model.

As shown in the figure, the height measurement system 700 may include a measured object transporting device 701 and a height measuring device 702.

The above-described object transfer device 701 may include a transfer belt 7011 for transferring a plurality of objects 703. The plurality of objects 703 may be uniformly or non-uniformly distributed on the conveyor belt 7011.

The structure, arrangement, etc. of the height measuring device 702 may be described in the foregoing embodiments, and will not be described in detail herein. The light emitting end of each light source in the height measurement device 702 may be disposed toward the conveyor 7011, for example, the light emitting end of the light source may be disposed above the conveyor 7011 to emit measurement light downward.

The light receiving end of each detector in the height measuring device 702 may be disposed toward the conveyor belt 7011, and the light receiving end of the detector may be disposed above the conveyor belt 7011 to receive reflected light reflected by the lower measured object 703. It is to be understood that the arrangement relation between the height measuring device 702 and the measured object transporting device 701 is not limited thereto, and other arrangements may be adopted, which will not be described in detail herein.

The height measurement system 700 according to the embodiment of the present utility model includes the height measurement device 702 with reduced thickness while meeting the requirement of lateral resolution, so that the height measurement system solves the problem that both cannot be considered.

Fig. 8 shows a schematic structural diagram of a height measurement system 800 according to an embodiment of the utility model.

As shown in the figures, the height measurement system 800 may include a plurality of the height measurement devices 801 arranged side by side. The structure of the height measuring device 801 and its arrangement relation with the conveyor belt 802, etc. are the same as or similar to those of the height measuring system 700 described above, and will not be described in detail here.

In the present embodiment, the arrangement direction of the plurality of height measuring devices 801 may be perpendicular to the conveyance direction of the conveyance belt 802 (in the drawing, the conveyance belt 802 is conveyed in a direction perpendicular to the paper surface). As can be seen from the foregoing description, the arrangement of the plurality of height measuring devices 801 in the present embodiment can further improve the lateral resolution, so that the height of the object to be measured on the conveyor belt 802 having a large width can be measured.

In order to make the spacing between adjacent light sources or detectors or lenses in two adjacent height measuring devices 801 the same as the spacing between adjacent light sources or detectors or lenses in the height measuring devices 801, thereby ensuring that the measurement resolution (distance between adjacent measurement points) on the conveyor belt 802 remains evenly distributed, the height measuring devices 801 may be implemented as a close-coupled arrangement and the housing outer wall is as thin as possible such that 2 times the thickness of the housing outer wall is no greater than the spacing between adjacent light sources or detectors or lenses in the height measuring devices 801.

It should be understood that the terms "first," "second," "third," and "fourth," etc. in the claims, specification and drawings of the present utility model are used for distinguishing between different objects and not for describing a particular sequential order. The terms "comprises" and "comprising" when used in the specification and claims of the present utility model are taken to specify the presence of stated features, integers, steps, operations, elements, and/or components, but do not preclude the presence or addition of one or more other features, integers, steps, operations, elements, components, and/or groups thereof.

While various embodiments of the present utility model have been shown and described herein, it will be obvious to those skilled in the art that such embodiments are provided by way of example only. Numerous modifications, changes, and substitutions will occur to those skilled in the art without departing from the spirit and scope of the utility model. It should be understood that various alternatives to the embodiments of the utility model described herein may be employed in practicing the utility model. The appended claims are intended to define the scope of the utility model and are therefore to cover all equivalents or alternatives falling within the scope of these claims.

Claims (10)

1. A height measurement device, comprising:

a light source array including a plurality of light sources integrated on one light source mounting board, wherein each of the light sources is configured to emit measurement light to a corresponding object to be measured, so that the object to be measured generates reflected light according to the measurement light; and

a detector array comprising a plurality of detectors integrated on a detector mounting plate, wherein each of the detectors is configured to receive reflected light generated by a corresponding object under test, so as to measure the height of the object under test based on the measured light and the reflected light.

2. The height measurement device of claim 1, wherein the light source comprises a point light source.

3. The height measurement device of claim 2, wherein the light source comprises an elliptical spot light source.

4. The height measurement device according to claim 1, wherein a distance between centers of any two adjacent detectors in the plurality of detectors is between 1 and 10 mm.

5. The height measurement device of claim 1, wherein a plurality of light sources in the array of light sources are arranged in a row, a plurality of detectors in the array of detectors are arranged in a row, and the resulting row of light sources and row of detectors are arranged in parallel.

6. The height measurement device of claim 5, wherein each of the plurality of light sources corresponds to one or more of the detectors.

7. The height measurement device according to any one of claims 1-6, further comprising:

a lens array comprising a plurality of lenses integrated on a lens mounting plate, wherein each of said lenses is disposed on the receiving light path of each of said detectors and is configured to:

collecting reflected light generated by a measured target and focusing; and

the focused light is transmitted to a detector for reception thereof.

8. The height measurement device of claim 7, further comprising:

the light source array, the detector array and the lens array are all arranged in the shell.

9. A height measurement system, comprising:

a measured object transporting device including a transporting belt for transporting a plurality of measured objects; and

the height measurement device of any one of claims 1-8, a light emitting end of each of the light sources in the height measurement device being disposed toward the conveyor belt; and

the light receiving end of each of the detectors in the height measuring device is disposed toward the conveyor belt.

10. The height measurement system according to claim 9, wherein the height measurement system comprises a plurality of the height measurement devices arranged side by side, an arrangement direction of the plurality of the height measurement devices being perpendicular to a conveying direction of the conveying belt.