Photoelectric sensor

Abstract

The invention provides a photoelectric sensor, and relates to the technical field of photoelectric sensing. The photoelectric sensor provided by the invention comprises a light emitting device and a light receiving device, the light emitting device comprises a plurality of light emitting elements arranged along a first direction, and the light receiving device comprises a plurality of light receiving elements arranged along the first direction; the plurality of light receiving elements are respectively opposite to the plurality of light emitting elements; each light receiving element is configured to receive light emitted by the corresponding light emitting element. At least one of the light emitting device and the light receiving device is provided with an indication unit, the indication unit is configured to display state information, and the state information is used for indicating at least one of an alignment state and an operation state between the light receiving element and the light emitting element. Therefore, the relative positions of the light emitting device and the light receiving device can be adjusted according to the display content of the indicating unit, assembly alignment of the light emitting device and the light receiving device is rapidly achieved, and the alignment precision of the light emitting device and the light receiving device is improved.

Description

Technical Field

[0001] The present application relates to the field of photoelectric sensing technology, and in particular to a photoelectric sensor. Background Art

[0002] Photoelectric sensors are devices that convert light signals into electrical signals. Photoelectric sensors have the advantages of high precision, fast response, and non-contact. They can measure many parameters, have simple structures, and are flexible and diverse in form. They are widely used in scenarios with detection and control requirements.

[0003] In the related technology, a multi-axis photoelectric sensor usually includes a transmitter and a receiver. Both the transmitter and the receiver include multiple photoelectric elements. The multiple photoelectric elements can generate a whole column of light at intervals, thereby forming a detection light curtain as a whole. In conjunction with a controller, the function of monitoring or measuring the external dimensions of an object can be realized in a scanning manner.

[0004] However, the current photoelectric sensor's transmitter and receiver cannot be precisely aligned during assembly, and the alignment accuracy of the two is insufficient. Summary of the invention

[0005] The present application provides a photoelectric sensor to solve the technical problem that the transmitter and receiver of the current photoelectric sensor cannot accurately adjust the alignment state during assembly and the alignment accuracy of the two is insufficient. The present application provides a photoelectric sensor that can improve the convenience of adjusting the alignment state between the transmitter and the receiver and improve the alignment accuracy of the two.

[0006] The photoelectric sensor provided in this application includes:

[0007] A light emitting device comprises a plurality of light emitting elements arranged along a first direction.

[0008] A light receiving device comprises a plurality of light receiving elements arranged along a first direction; the plurality of light receiving elements are respectively opposite to the plurality of light emitting elements; each light receiving element is configured to receive light emitted by the corresponding light emitting element.

[0009] At least one of the light emitting device and the light receiving device is provided with an indication unit, and the indication unit is configured to display status information, and the status information is used to indicate at least one of an alignment status and an operating status between the light receiving element and the light emitting element.

[0010] The photoelectric sensor provided by the present application is respectively arranged by correspondingly setting multiple light emitting units on the light emitting device and multiple light receiving units on the light receiving device to form a light array between the two, and an indication unit is set on one of the light emitting device and the light receiving device, which can clearly display the alignment state and operating state of the light emitting device and the light receiving device during assembly, so that the relative position of the light emitting device and the light receiving device can be adjusted according to the display information of the indication unit, and the assembly alignment of the two can be quickly achieved, thereby improving the alignment accuracy of the light emitting device and the light receiving device. In addition, it can be clearly judged whether the light emitting device and the light receiving device have been turned on and whether there is a fault.

[0011] As an optional implementation manner, the indicating unit indicates the status information through at least one of character information and color information.

[0012] With such an arrangement, the operator who installs the photoelectric sensor can more intuitively judge the current alignment state of the light emitting device and the light receiving device, thereby adjusting the relative positions of the two.

[0013] As an optional implementation manner, the indication unit may include a first indication unit, and the first indication unit has a first display state and a second display state.

[0014] When the light receiving element receives the light emitted by the light emitting element, the first indicating unit is in the first display state; when the light receiving element does not receive the light emitted by the light emitting element, the first indicating unit is in the second display state.

[0015] With this arrangement, the positions of the light emitting device and the light receiving device can be adjusted according to the display state of the first indication unit. As long as the first indication unit is in the first display state, the light emitting device and the light receiving device can be aligned, thereby improving the convenience of adjustment.

[0016] As an optional embodiment, the light emitting device may include multiple light emitting modules, each light emitting module includes at least one light emitting element; there are multiple first indication units, each light emitting module is provided with at least one of the first indication units; and / or, the light receiving device includes multiple light receiving modules, each light receiving module includes at least one light receiving element; there are multiple first indication units, each light receiving module is provided with at least one first indication unit.

[0017] With such arrangement, in the first direction, the relative positions of the corresponding light emitting modules and light receiving modules can be aligned and adjusted respectively, ensuring that the entire optical axis array in the first direction can be in an accurately aligned state.

[0018] As an optional implementation, the indication unit may include a second indication unit, and the second indication unit is configured to display at least one mark, where the mark is used to indicate preset information.

[0019] As an optional implementation, at least one identifier is used to indicate at least one of the intensity of the light from the light emitting element received by the light receiving element and the fault information of the photoelectric sensor.

[0020] With such a configuration, the positions of the light emitting device and the light receiving device can be accurately adjusted according to the display results of the second indication unit to ensure that the receiving element receives stronger light and improve the alignment accuracy of the light emitting device and the light receiving device. In addition, fault problems of the photoelectric sensor can be discovered in time for maintenance.

[0021] As an optional implementation, the second indication unit has a display area, and the display area is configured to display multiple logos in sequence; or, the second indication unit has multiple display areas, and the multiple display areas are arranged along the first direction and respectively display multiple logos.

[0022] Such an arrangement can more intuitively, clearly and accurately display the light receiving intensity information of the light emitting device and the light receiving device during alignment, so that the assembler can more conveniently determine the current alignment accuracy.

[0023] As an optional implementation, the light emitting device and the light receiving device both include a shell and a light-transmitting plate, the shell has a accommodating cavity extending along a first direction, the light emitting element is arranged in the shell of the light emitting device, and the light receiving element is arranged in the shell of the light receiving device; the accommodating cavity has an opening, and the light-transmitting plate is connected to the shell and blocked at the opening.

[0024] The indicating unit is located in the accommodating cavity, and the display side of the indicating unit faces the light-transmitting plate.

[0025] Such an arrangement can improve the convenience for the installer to observe the display information of the indicating unit.

[0026] As an optional implementation, the shell has a limiting portion, which is located on both sides of the opening, and the limiting portions on both sides form accommodating grooves with the two side edges of the opening respectively, and the two sides of the light-transmitting plate are respectively inserted into the accommodating grooves on both sides of the opening.

[0027] Such an arrangement improves the reliability of the installation of the light-transmitting plate.

[0028] As an optional embodiment, the shell may include a shell body, a first end cover and a second end cover, the shell body is configured to form a accommodating cavity, and the accommodating cavity is connected at both ends along the first direction; the first end cover and the second end cover are respectively connected to the two ends of the shell body along the first direction.

[0029] Such an arrangement can improve the convenience of processing and forming the shell and reduce costs. In addition, when the optoelectronic element is assembled into the accommodating cavity, the assembly convenience can be improved.

[0030] As an optional implementation, the photoelectric sensor may further include a seal, wherein a seal is disposed between the first end cover and the shell body; and a seal is disposed between the second end cover and the shell body.

[0031] Such an arrangement can prevent external water or dust from entering the containing cavity, thus ensuring a clean working environment for the photoelectric element.

[0032] As an optional implementation, the sealing member is arranged around the end edge of the shell body; the sealing member has a protrusion on the side facing the opening, and the protrusion abuts against the end of the light-transmitting plate.

[0033] As an optional implementation, a threaded connection portion integrally formed therewith is provided on a side of the first end cover facing away from the shell body, and the threaded connection portion is configured to be connected to an external connector.

[0034] As an optional embodiment, the second indication unit is arranged at the end of the light emitting device or the light receiving device, and the identification display direction of the second indication unit is parallel to the length direction of the light emitting device or the light receiving device; and / or, the first indication unit is located between adjacent light emitting elements, or between adjacent light receiving elements.

[0035] Such an arrangement makes it easier for operators to observe the display information of the indicating unit.

[0036] As an optional implementation, the photoelectric sensor may further include a mounting bracket, which is disposed in the accommodating cavity; the mounting bracket has a plurality of mounting grooves arranged along the first direction, and the mounting grooves are configured to accommodate the light emitting element or the light receiving element.

[0037] With such arrangement, a plurality of optoelectronic components can be assembled as a whole, thereby improving installation convenience and efficiency.

[0038] As an optional implementation, the photoelectric sensor may further include a controller, which is disposed in the accommodating cavity; the controller is located on a side of the mounting bracket away from the light-transmitting plate, and the controller is electrically connected to the photoelectric element.

[0039] Such an arrangement can fully utilize the space in the accommodating cavity, improve the compactness of the layout, and facilitate the narrowing design of the photoelectric sensor.

[0040] The present application provides a photoelectric sensor, including a light emitting device and a light receiving device, wherein the light emitting device includes a plurality of light emitting elements arranged along a first direction, and the light receiving device includes a plurality of light receiving elements arranged along the first direction; the plurality of light receiving elements are respectively opposite to the plurality of light emitting elements; and each light receiving element is configured to receive light emitted by the corresponding light emitting element. At least one of the light emitting device and the light receiving device is provided with an indication unit, and the indication unit is configured to display status information, and the status information is used to indicate at least one of an alignment state and an operating state between the light receiving element and the light emitting element, so that the relative position of the light emitting device and the light receiving device can be adjusted according to the display content of the indication unit, and the assembly alignment of the two can be quickly realized, and the alignment accuracy of the light emitting device and the light receiving device can be improved, and when a fault occurs, the cause of the fault can be quickly determined.

[0041] In addition to the technical problems solved by the embodiments of the present application described above, the technical features that constitute the technical solutions, and the beneficial effects brought about by the technical features of these technical solutions, other technical problems that can be solved by the photoelectric sensor provided by the present application, other technical features included in the technical solutions, and the beneficial effects brought about by these technical features will be further described in detail in the specific implementation methods. BRIEF DESCRIPTION OF THE DRAWINGS

[0042] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, a brief introduction will be given below to the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying any creative work.

[0043] Figure 1 A schematic diagram of a photoelectric sensor provided in an embodiment of the present application;

[0044] Figure 2 A schematic diagram of the structure of a light emitting device and a light receiving device of a photoelectric sensor provided in an embodiment of the present application;

[0045] Figure 3 An internal schematic diagram of a light emitting device and a light receiving device of a photoelectric sensor provided in an embodiment of the present application;

[0046] Figure 4 for Figure 3 Partial view of the A position in the middle;

[0047] Figure 5 An exploded diagram of a light emitting device and a light receiving device of a photoelectric sensor provided in an embodiment of the present application;

[0048] Figure 6A cross-sectional view of a light emitting device and a light receiving device of a photoelectric sensor provided in an embodiment of the present application;

[0049] Figure 7 An exploded diagram of a multi-light emitting module or a multi-light receiving module in a photoelectric sensor provided in an embodiment of the present application;

[0050] Figure 8 This is a schematic diagram of the assembly of the sealing component in the photoelectric sensor provided in an embodiment of the present application.

[0051] Description of reference numerals:

[0052] 10- Photoelectric sensor;

[0053] 100-light emitting device; 101-light emitting element; 110-light emitting module;

[0054] 200-light receiving device; 201-light receiving element; 210-light receiving module;

[0055] 300 - indication unit; 310 - first indication unit; 320 - second indication unit; 321 - display area;

[0056] 400-housing; 401-accommodating cavity; 402-opening; 403-limiting portion; 410-housing body; 420-first end cover; 421-annular sealing groove; 430-second end cover; 440-sealing member; 441-protrusion; 450-threaded connection portion;

[0057] 500-light-transmitting plate;

[0058] 600-mounting bracket; 601-mounting slot;

[0059] 700-Controller. DETAILED DESCRIPTION

[0060] In order to make the purpose, technical solution and advantages of the embodiments of the present application clearer, the technical solution in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of this application.

[0061] First, those skilled in the art should understand that these implementations are only used to explain the technical principles of the present application and are not intended to limit the scope of protection of the present application. Those skilled in the art can make adjustments to them as needed to adapt to specific application scenarios.

[0062] Secondly, it should be noted that in the description of the present application, terms such as "up", "down", "left", "right", "front", "back", "inside" and "outside" indicating directions or positional relationships are based on the directions or positional relationships shown in the drawings. This is merely for the convenience of description and does not indicate or imply that the device or component must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be understood as a limitation on the present application.

[0063] In addition, it should be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "connected" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0064] In the description of this specification, the description with reference to the terms "one embodiment", "some embodiments", "illustrative embodiments", "examples", "specific examples", or "some examples" means that the specific features, structures, materials, or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the present disclosure. In this specification, the schematic representations of the above terms do not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials, or characteristics described may be combined in any one or more embodiments or examples in a suitable manner.

[0065] Multi-axis photoelectric sensors usually include a transmitter and a receiver. Both the transmitter and the receiver include multiple photoelectric elements. The multiple photoelectric elements can generate a whole column of light at intervals, thereby forming a detection light curtain as a whole. In conjunction with the controller, the function of monitoring or measuring the external dimensions of the object can be realized by scanning. At present, the transmitter and the receiver need to be set at intervals to ensure that a light curtain detection space is formed between the two. In specific application scenarios, the transmitter and the receiver need to be installed separately. Since light propagates in a straight line, it is necessary to ensure that the transmitter and the receiver are aligned during assembly so that the receiver can receive the light emitted by the transmitter and realize the detection function. However, the current transmitter and the receiver cannot accurately adjust the alignment state during assembly, and the alignment accuracy of the two is insufficient, resulting in the problem that some photoelectric elements between the two may not receive the light signal or the received light signal is weak, which in turn leads to inaccurate detection results or false detection of the photoelectric sensor.

[0066] In response to the above problems, an embodiment of the present application provides a photoelectric sensor, in which a plurality of light emitting units on a light emitting device and a plurality of light receiving units on a light receiving device are respectively arranged in correspondence to form a light array between the two to realize a detection function, and an indication unit is arranged on one of the light emitting device and the light receiving device, which can clearly display the alignment state of the light emitting device and the light receiving device during assembly, so that the relative position of the light emitting device and the light receiving device can be adjusted according to the display information of the indication unit, and the assembly alignment of the two can be quickly realized, thereby improving the alignment accuracy of the light emitting device and the light receiving device, and avoiding the photoelectric sensor from failing in the detection function or misdetecting due to assembly errors.

[0067] For ease of understanding, the following first describes the applicable application scenarios of the photoelectric sensor provided in the embodiments of the present application.

[0068] The photoelectric sensor provided in the embodiment of the present application is a multi-axis photoelectric sensor, which can be applied to production, assembly or transportation automation equipment in manufacturing factories, and can also be applied to assembly lines or sorting equipment in logistics warehousing. In addition, the specific functions of the photoelectric sensor provided in the embodiment of the present application can be to monitor whether there is an object passing through a specific area, detect the external dimensions of an object, etc., and the embodiment of the present application does not make specific limitations on this.

[0069] Figure 1 A schematic diagram of a photoelectric sensor provided in an embodiment of the present application; Figure 2 A schematic diagram of the structure of a light emitting device and a light receiving device of a photoelectric sensor provided in an embodiment of the present application; Figure 3 An internal schematic diagram of a light emitting device and a light receiving device of a photoelectric sensor provided in an embodiment of the present application; Figure 4 for Figure 3 Partial view of position A in the middle.

[0070] Please refer to Figures 1 to 4 The present application provides a photoelectric sensor 10 including a light emitting device 100 and a light receiving device 200. The light emitting device 100 includes a plurality of light emitting elements 101 arranged along a first direction, and the light receiving device 200 includes a plurality of light receiving elements 201 arranged along the first direction. The plurality of light receiving elements 201 are respectively opposite to the plurality of light emitting elements 101. The light emitting elements 101 are used to emit light, and each light receiving element 201 is configured to receive light emitted by the corresponding light emitting element 101.

[0071] It can be understood that the light emitted by a light emitting element 101 is received by a corresponding light receiving element 201, thereby forming a detection light axis. Multiple detection light axes can be formed between multiple light emitting elements 101 and multiple light receiving elements 201, thereby forming a light array between the light emitting device 100 and the light receiving device 200.

[0072] When there is no object between the light emitting device 100 and the light receiving device 200, the light receiving element 201 can normally receive the light emitted by the light emitting element 101. When there is an object between the light emitting device 100 and the light receiving device 200, the light emitted by the light emitting element 101 is blocked by the object, and the light receiving element 201 cannot receive the light, causing the electrical signal output by the light receiving element device to change, thereby realizing the function of monitoring or measuring the shape and size of the object.

[0073] When the photoelectric sensor 10 is used, the light emitting device 100 and the light receiving device 200 need to be installed at intervals so that there is space between the light emitting device 100 and the light receiving device 200 to form a multi-axis light array. The relative positions of the light emitting device 100 and the light receiving device 200 that are arranged at intervals need to be adjusted during installation to ensure that the light receiving device 200 can receive the light emitted by the light emitting device 100, so that the photoelectric sensor 10 can realize the monitoring or measurement function.

[0074] In an embodiment of the present application, at least one of the light emitting device 100 and the light receiving device 200 is provided with an indication unit 300, and the indication unit 300 is configured to display status information, and the status information is used to indicate at least one of the alignment status and the operating status between the light receiving element 201 and the light emitting element 101.

[0075] It is understandable that the light receiving element 201 and the light emitting element 101 may have different alignment states. For example, the alignment state may include an aligned state and a misaligned state. When the light receiving element 201 can receive the light emitted by the light emitting element 101, the light receiving element 201 and the light emitting element 101 are in an aligned state; when the light receiving element 201 cannot receive the light emitted by the light emitting element 101, the light receiving element 201 and the light emitting element 101 are in a misaligned state. When the light receiving element 201 and the light emitting element 101 are in different alignment states, the indication unit 300 may display different state information, so that the relative position of the light emitting device 100 and the light receiving device 200 may be adjusted according to the state information of the indication unit 300.

[0076] In addition, the indication unit 300 can be used to indicate different operating states of the light emitting device 100 and the light receiving device 200, including but not limited to: whether the light emitting device 100 and the light receiving device 200 are started, whether the light emitting device 100 and the light receiving device 200 have faults, etc.

[0077] Exemplarily, when adjusting the light emitting device 100 and the light receiving device 200, the method adopted may be to translate one of the light emitting device 100 and the light receiving device 200 along the first direction or the second direction, wherein the second direction is perpendicular to the first direction. Alternatively, one of the light emitting device and the light receiving device 200 is rotated.

[0078] It should be noted that, in the photoelectric sensor 10 provided in the embodiment of the present application, by setting an indication unit 300 on one of the light emitting device 100 and the light receiving device 200, the alignment state and operating state of the light emitting device 100 and the light receiving device 200 during assembly can be clearly displayed, so that the relative position of the light emitting device 100 and the light receiving device 200 can be adjusted according to the display information of the indication unit 300, and the assembly alignment of the two can be quickly achieved, thereby improving the alignment accuracy of the light emitting device 100 and the light receiving device 200, and when the photoelectric sensor 10 fails, the cause of the failure can be quickly discovered.

[0079] In some embodiments, the indicating unit 300 indicates the status information through at least one of character information and color information. By characterizing the current alignment status of the light emitting device 100 and the light receiving device 200 through character information or color information, it is possible to more conveniently determine whether the relative position of the light emitting device 100 and the light receiving device 200 should be adjusted, and how to adjust the relative position of the light emitting device 100 and the light receiving device 200.

[0080] It is understandable that the character information may include one or more of English letters, numbers, etc. The color information may include green, red, etc., which is not specifically limited in the embodiment of the present application. Using the character information and color information, the operator who installs the photoelectric sensor 10 can more intuitively judge the alignment state of the current light emitting device 100 and the light receiving device 200, thereby adjusting the relative position of the two.

[0081] The specific manner in which the indicating unit 300 indicates the relative position of the light emitting device 100 and the light receiving device 200 is described in detail below through specific examples of different indicating units 300 .

[0082] Please continue to refer to Figures 1 to 4 In a possible implementation, the indication unit 300 may include a first indication unit 310, and the first indication unit 310 has a first display state and a second display state. The first display state and the second display state correspond to different alignment states between the light emitting element 101 and the light receiving element 201, respectively.

[0083] It can be understood that when the light receiving element 201 receives the light emitted by the light emitting element 101, the first indication unit 310 is in the first display state, that is, the first display state corresponds to the aligned state between the light emitting element 101 and the light receiving element 201. When the light receiving element 201 does not receive the light emitted by the light emitting element 101, the first indication unit 310 is in the second display state, that is, the second display state corresponds to the misaligned state between the light emitting element 101 and the light receiving element 201.

[0084] Exemplarily, the first indicator unit 310 may be an indicator light, and the indicator light may display different colors, and the first display state and the second display state are characterized by color information. For example, the colors displayed by the first indicator unit 310 include red and green, green corresponds to the first display state, and red corresponds to the second display state, that is, when the first indicator unit 310 displays green, it indicates that the current light emitting element 101 and the light receiving element 201 are aligned, and when the first indicator unit 310 displays red, it indicates that the current light emitting element 101 and the light receiving element 201 are not aligned.

[0085] It should be noted that in the embodiment of the present application, the positions of the light emitting device 100 and the light receiving device 200 can be adjusted according to the display state of the first indication unit 310. As long as the first indication unit 310 is in the first display state, it can be ensured that the light emitting device 100 and the light receiving device 200 are in an aligned state, thereby improving the convenience of adjustment.

[0086] Please continue to refer to Figures 1 to 4 In some embodiments, the light emitting device 100 may include a plurality of light emitting modules 110 , each of which includes at least one light emitting element 101 . There are a plurality of first indicating units 310 , each of which is provided with at least one first indicating unit 310 .

[0087] It is understandable that, since a plurality of light emitting units and light receiving units are arranged along the first direction, in the process of installing the light emitting device 100 and the light receiving device 200 respectively, it may happen that some light emitting elements 101 and light receiving elements 201 are aligned, while other parts of the light emitting elements 101 and light receiving elements 201 are not aligned. Therefore, the light emitting elements 101 can be arranged in groups, and one or more light emitting elements 101 form a light emitting module 110 as a group. Different light emitting modules 110 are displayed with different first indicating units 310 to indicate the current alignment state, so that in the first direction, the relative positions of the corresponding light emitting modules 110 and light receiving modules 210 can be aligned and adjusted respectively, so as to ensure that the entire optical axis array in the first direction can be in an accurately aligned state.

[0088] Exemplarily, the light emitting device 100 may include two light emitting modules 110 and two first indication units 310, each light emitting module 110 is respectively provided with a first indication unit 310, each light emitting module 110 includes a plurality of light emitting elements 101, and the number of light emitting elements 101 included in each light emitting module 110 may be two, three or more, which is not specifically limited in the embodiments of the present application.

[0089] For each light emitting module 110, the first indicator unit 310 will display the first display state only when all the light emitted by all the light emitting elements 101 in the light emitting module 110 can be received by the corresponding light receiving element 201. Otherwise, the first indicator unit 310 will display the second display state. In other words, as long as one light emitting element 101 in the light emitting module 110 is not aligned with the corresponding light receiving element 201, the first indicator unit 310 will display the second display state.

[0090] In some embodiments, the optical receiving device 200 includes a plurality of optical receiving modules 210, each optical receiving module 210 includes at least one optical receiving element 201, and there are a plurality of first indicating units 310, each optical receiving module 210 is provided with at least one first indicating unit 310. It is understandable that the configuration of the optical receiving module 210 and the corresponding relationship with the first indicating unit 310 may be similar to the aforementioned optical transmitting module 110, and will not be described in detail herein.

[0091] It should be noted that the first indication unit 310 may be provided on one of the light emitting device 100 and the light receiving device 200, or may be provided on both of them, which is not specifically limited in the embodiment of the present application.

[0092] Please continue to refer to Figures 1 to 4 In a possible implementation, the indication unit 300 may include a second indication unit 320, and the second indication unit 320 is configured to display at least one identifier, which is used to indicate preset information.

[0093] Exemplarily, at least one identifier is used to indicate at least one of the intensity of the light of the light emitting element 101 received by the light receiving element 201 and the fault information of the photoelectric sensor. The identifier may include characters, graphics or other information content, and the following description takes characters as an example.

[0094] It is understandable that the stronger the light received by the light receiving element 201, the stronger the electrical signal fed back during the photoelectric conversion, and accordingly, the higher the alignment accuracy between the corresponding light receiving element 201 and the light emitting element 101. By accurately adjusting the positions of the light emitting device 100 and the light receiving device 200 according to the display result of the second indication unit 320, it can be ensured that the light receiving element 201 receives stronger light, thereby improving the alignment accuracy of the light emitting device 100 and the light receiving device 200.

[0095] In addition, the characters displayed by the second indication unit 320 can be used to indicate the fault information of the photoelectric sensor. For example, when the circuit components or optical elements in the light emitting device 100 or the light receiving device 200 are damaged or faulty, the second indication unit 320 can display corresponding characters so that the operator or installer can promptly find the fault problem of the photoelectric sensor and perform maintenance.

[0096] In some embodiments, the second indication unit 320 has a display area 321 , and the display area 321 is configured to sequentially display a plurality of identifications. Different identifications may correspond to different intensities of light received by the light receiving element 201 .

[0097] Among them, the second indication unit 320 can grade the light intensity received by the light receiving element 201, for example, the light intensity received by the light receiving element 201 can be divided into level 0, level 1, level 2, level 3, etc. The larger the number, the higher the corresponding light intensity. Level 0 indicates that the light receiving element 201 does not receive the light from the light emitting element 101.

[0098] Exemplarily, the second indicating unit 320 may be a digital tube, and the characters that may be displayed by the second indicating unit 320 include "ER", "E1", "E2", "E3", etc., wherein "ER" indicates that the intensity of light received by the light receiving element 201 is classified into level 0, that is, the light receiving element 201 does not receive the light emitted by the light emitting element 101, and the light receiving device 200 and the light emitting device 100 are not aligned, "E1" indicates that the intensity of light received by the light receiving element 201 is classified into level 1, "E2" indicates that the intensity of light received by the light receiving element 201 is classified into level 2, and "E3" indicates that the intensity of light received by the light receiving element 201 is classified into level 3. From "E1" to "E3", the alignment accuracy between the light receiving device 200 and the light emitting device 100 increases gradually.

[0099] It should be noted that the second indicator unit 320 may be a digital tube with a single display area 321, and the display area 321 may display one character at a time. When displaying information such as "ER", "E1", "E2", and "E3", each information state includes two characters, and the single display area 321 of the second indicator unit 320 may display information in an alternating manner. For example, when "ER" needs to be displayed, "E" may be displayed first, then "R", and then "E", and so on.

[0100] In some embodiments, the second indication unit 320 has multiple display areas 321, and the multiple display areas 321 are arranged along the first direction and display multiple logos respectively. The multiple display areas 321 are different from the above-mentioned single display area 321 in that the second indication unit 320 of the multiple display areas 321 can display multiple characters at the same time. The working principle and indication information of the second indication unit 320 of the multiple display areas 321 are not described in detail in the embodiment of the present application.

[0101] Exemplarily, the number of display areas 321 included in the second indication unit 320 may be two, three or more, which is not specifically limited in the embodiment of the present application.

[0102] It should be noted that the second indicating unit 320 can more intuitively, clearly and accurately display the light receiving intensity information of the light emitting device 100 and the light receiving device 200 during alignment, so that the assembler can more conveniently determine the current alignment accuracy.

[0103] The specific structures of the light emitting device 100 and the light receiving device 200 are described in detail below.

[0104] Figure 5 An exploded diagram of a light emitting device and a light receiving device of a photoelectric sensor provided in an embodiment of the present application; Figure 6 A cross-sectional view of a light emitting device and a light receiving device of a photoelectric sensor provided in an embodiment of the present application; Figure 7 An exploded diagram of a multi-light emitting module or a multi-light receiving module in a photoelectric sensor provided in an embodiment of the present application; Figure 8 This is a schematic diagram of the assembly of the sealing component in the photoelectric sensor provided in an embodiment of the present application.

[0105] Please refer to Figures 5 to 8 , and combined with Figures 2 to 4 In a possible implementation, the light emitting device 100 and the light receiving device 200 both include a shell 400 and a light-transmitting plate 500, the shell 400 has a accommodating cavity 401 extending along a first direction, the light emitting element 101 is disposed in the shell 400 of the light emitting device 100, and the light receiving element 201 is disposed in the shell 400 of the light receiving device 200.

[0106] It is understandable that the light emitting device 100 and the light receiving device 200 have the same or similar housing 400 structure, and accordingly, the light emitting element 101 and the light receiving element 201 have the same or similar installation method. Both the light emitting element 101 and the light receiving element 201 are optoelectronic elements.

[0107] When describing the specific structure and assembly relationship of the shell 400, the light-transmitting plate 500 and the photoelectric element below, if the structures of the light-emitting device 100 and the light-receiving device 200 are not described separately, it means that the structures adopted by the light-emitting device 100 and the light-receiving device 200 are the same and will not be further described.

[0108] In some embodiments, the accommodating cavity 401 has an opening 402, and the light-transmitting plate 500 is connected to the housing 400 and blocked at the opening 402. The indicating unit 300 is located in the accommodating cavity 401, and the display side of the indicating unit 300 faces the light-transmitting plate 500.

[0109] It is understandable that the housing 400 may be a profile structure extending in a first direction, the opening 402 is on the side of the housing 400, and the opening 402 extends in the first direction. The first direction is the X direction in the drawings of the specification. The length of the opening 402 may match the length of the housing 400. The light-transmitting plate 500 may protect the photoelectric element and the indicating unit 300 in the accommodating cavity 401. At the same time, the light-transmitting plate 500 may allow the light to pass through the light-transmitting plate 500 when the photoelectric element emits or receives light. When installing the photoelectric sensor 10, the display information of the display unit may be clearly observed through the light-transmitting plate 500, which improves the convenience for the installer to observe the display information of the indicating unit 300.

[0110] For example, the housing 400 may be made of metal or alloy such as aluminum, iron, etc. The light-transmitting plate 500 may be made of light-transmitting plastic such as acrylic or glass, which is not specifically limited in the present embodiment.

[0111] It should be noted that the length of the shell 400 can be designed according to the specific number of optoelectronic units to be arranged in the accommodating cavity 401. The embodiment of the present application does not specifically limit the specific size of the shell 400 or the number of optoelectronic units to be arranged.

[0112] In some embodiments, the shell 400 has a limiting portion 403, which is located on both sides of the opening 402. The limiting portions 403 on both sides form accommodating grooves with the two side edges of the opening 402 respectively. The two sides of the light-transmitting plate 500 are respectively inserted into the accommodating grooves on both sides of the opening 402, thereby improving the installation reliability of the light-transmitting plate 500.

[0113] It can be understood that the receiving groove extends along the first direction, and when the light-transmitting plate 500 is assembled, the light-transmitting plate 500 can be inserted into the receiving groove along the first direction from the end of the housing 400 .

[0114] Exemplarily, the light-transmitting plate 500 may be gap-fitted with the limiting portion 403, and the light-transmitting plate 500 may be bonded in the accommodating cavity 401 by glue, adhesive tape, etc. Alternatively, the light-transmitting plate 500 and the limiting portion 403 may be interference-fitted, and when the light-transmitting plate 500 is inserted into the accommodating groove, the limiting portions 403 on both sides of the opening 402 may respectively press the two side edges of the surface of the light-transmitting plate 500 to prevent the light-transmitting plate 500 from shaking in the accommodating groove or slipping out of the accommodating groove.

[0115] Exemplarily, the limiting portion 403 may be integrally formed with the housing 400 .

[0116] In some embodiments, the housing 400 may include a housing body 410, a first end cap 420 and a second end cap 430. The housing body 410 is configured to form a housing cavity 401, and both ends of the housing cavity 401 along the first direction are connected. The first end cap 420 and the second end cap 430 are respectively connected to both ends of the housing body 410 along the first direction.

[0117] It is understandable that the first end cap 420 can be fixedly connected to the end face of the shell body 410 along the first direction by fasteners such as bolts. The second end cap 430 can be fixedly connected to the end face of the shell body 410 along the first direction by fasteners such as bolts. When the first end cap 420 and the second end cap 430 are assembled to the two ends of the shell body 410, they can be blocked at the two ends of the light-transmitting plate 500 to limit the light-transmitting plate 500. In addition, the shell body 410, the first end cap 420 and the second end cap 430 are separately molded and manufactured, which can improve the convenience of processing and molding of the shell 400, reduce costs, and improve the convenience of assembly when the photoelectric element is assembled to the accommodating cavity 401.

[0118] It should be noted that the housing body 410 may be a profile of metal or alloy material. The first end cap 420 and the second end cap 430 may be made of metal material, or the first end cap 420 and the second end cap 430 may be made of injection-molded plastic material, which is not specifically limited in the present embodiment.

[0119] In some embodiments, the photoelectric sensor 10 may further include a seal 440. The seal 440 is disposed between the first end cap 420 and the housing body 410. The seal 440 is disposed between the second end cap 430 and the housing body 410.

[0120] It is understandable that the seal 440 can seal the two side end surfaces of the shell body 410 to prevent external water or dust from entering the accommodating cavity 401, thereby ensuring the cleanliness of the working environment of the photoelectric element.

[0121] Exemplarily, the first end cover 420 may be provided with an annular sealing groove 421 on one side facing the shell body 410, and the sealing member 440 may be a sealing ring, which is disposed in the annular sealing groove 421. When the first end cover 420 is assembled to the end of the shell body 410, the portion of the sealing member 440 protruding from the annular sealing groove 421 abuts against the end surface of the shell body 410, thereby achieving a good sealing effect. The matching manner of the second end cover 430 and the sealing member 440 is the same or similar to that of the first end cover 420, and will not be repeated here.

[0122] Exemplarily, the seal 440 is arranged around the end edge of the shell body 410; the seal 440 has a protrusion 441 on the side facing the opening 402, and the protrusion 441 abuts against the end of the light-transmitting plate 500, thereby compensating for the step difference formed at the end when the light-transmitting plate 500 and the shell body 410 are assembled, so as to ensure that the shell body 410 has good sealing performance.

[0123] Exemplarily, the seal 440 may be made of elastic sealing material such as rubber, silicone, etc.

[0124] It should be noted that one of the first end cap 420 and the second end cap 430 has a threaded column and a through hole for assembly and connection with external parts, and the through hole can be used to lead out the cable of the optoelectronic element in the accommodating cavity 401. Exemplarily, the first end cap 420 is provided with a threaded connection portion 450 integrally formed therewith on one side away from the housing body 410, and the threaded connection portion 450 is configured to be connected to an external connector, thereby improving its sealing when connected to the external connector.

[0125] In some embodiments, the second indication unit 320 is disposed at the end of the light emitting device 100 or the light receiving device 200, and the identification display direction of the second indication unit 320 is parallel to the length direction of the light emitting device 100 or the light receiving device 200, so as to facilitate observation by the operator.

[0126] Exemplarily, the second indicating unit 320 may be disposed at one end of the accommodating cavity 401 close to the first end cover 420 or the second end cover 430 .

[0127] For example, in a specific application scenario, the multi-axis detection light curtain of the photoelectric sensor 10 can be in a vertical plane, that is, the light emitting device 100 and the light receiving device 200 are both arranged vertically. The indicating unit 300 can be a digital tube, which can be arranged at a position close to the top end cover of the light emitting device 100 or the light receiving device 200 so that the operator can observe the displayed information.

[0128] In some embodiments, the first indication unit 310 is located between adjacent light emitting elements 101 , or between adjacent light receiving elements 201 , so that it is more convenient for an operator to observe the display information of the indication unit 300 .

[0129] Exemplarily, the first indication unit 310 may be an indicator light, and a lens is provided on the light emitting side or the light incident side of the photoelectric element. The indicator light may be located between the lenses on two adjacent photoelectric elements, thereby preventing the indicator light tube from affecting the emission and reception of light by the photoelectric element.

[0130] In a possible implementation, the photoelectric sensor 10 may further include a mounting bracket 600, which is disposed in the accommodating cavity 401. The mounting bracket 600 has a plurality of mounting grooves 601 arranged along the first direction, and the mounting grooves 601 are configured to accommodate the light emitting element 101 or the light receiving element 201, so that a plurality of photoelectric elements can be assembled as a whole, thereby improving installation convenience and installation efficiency.

[0131] It is understandable that the mounting bracket 600 can be a hollow frame structure made of metal or plastic material, and the components, lenses, etc. of the optoelectronic element can be installed on the mounting bracket 600, and each optoelectronic element corresponds to the position of a mounting slot 601.

[0132] Exemplarily, there may be one or more mounting brackets 600, and the mounting brackets 600 have a preset length. In a specific application scenario, the number of corresponding mounting brackets 600 may be selected according to the number of required optical axes. For example, each mounting bracket 600 is provided with M photoelectric elements spaced in sequence along the first direction, and the accommodating cavity 401 of the housing 400 is provided with N mounting brackets 600 in sequence along the first direction, then the number of optical axes of the light array formed by the photoelectric sensor 10 is M×N.

[0133] In some embodiments, the photoelectric sensor 10 may further include a controller 700, which is disposed in the accommodating cavity 401. The controller 700 is located on the side of the mounting bracket 600 away from the light-transmitting plate 500, and the controller 700 is electrically connected to the photoelectric element, so that the space in the accommodating cavity 401 can be fully utilized, the compactness of the layout can be improved, and the narrow design of the photoelectric sensor 10 can be facilitated.

[0134] It can be understood that the controller 700 can be a printed circuit board (PCB). When assembling the photoelectric sensor 10, the controller 700 and the photoelectric element can be assembled on the mounting bracket 600 at the same time, so that the mounting bracket 600, the photoelectric element and the controller 700 are assembled as a whole into the accommodating cavity 401 of the shell 400, thereby improving the convenience of assembly, simplifying the assembly process, and reducing the production cost.

[0135] Exemplarily, the light emitting element 101 may include a light emitting device disposed on the controller 700 and a light emitting lens disposed on the mounting bracket 600. Exemplarily, the light receiving element 201 may include a light receiving device disposed on the controller 700 and a light receiving lens disposed on the mounting bracket 600.

[0136] The embodiment of the present application provides a photoelectric sensor, including a light emitting device and a light receiving device, wherein the light emitting device includes a plurality of light emitting elements arranged along a first direction, and the light receiving device includes a plurality of light receiving elements arranged along a first direction; the plurality of light receiving elements are respectively opposite to the plurality of light emitting elements; and each light receiving element is configured to receive light emitted by the corresponding light emitting element. At least one of the light emitting device and the light receiving device is provided with an indication unit, and the indication unit is configured to display status information, and the status information is used to indicate at least one of an alignment state and an operating state between the light receiving element and the light emitting element, so that the relative position of the light emitting device and the light receiving device can be adjusted according to the display content of the indication unit, and the assembly alignment of the two can be quickly achieved, and the alignment accuracy of the light emitting device and the light receiving device can be improved, and it can be clearly judged whether the light emitting device and the light receiving device have been turned on and whether there is a fault.

[0137] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application, rather than to limit it. Although the present application has been described in detail with reference to the aforementioned embodiments, a person of ordinary skill in the art should understand that the technical solutions described in the aforementioned embodiments can still be modified, or some or all of the technical features therein can be replaced by equivalents. However, these modifications or replacements do not cause the essence of the corresponding technical solution to deviate from the scope of the technical solution of the embodiments of the present application.

Claims

1. A photoelectric sensor (10), characterized in that: The photoelectric sensor (10) comprises: A light emitting device (100), the light emitting device (100) comprising a plurality of light emitting elements (101) arranged along a first direction; A light receiving device (200), the light receiving device (200) comprising a plurality of light receiving elements (201) arranged along the first direction; the plurality of light receiving elements (201) are respectively opposite to the plurality of light emitting elements (101); each of the light receiving elements (201) is configured to receive light emitted by the corresponding light emitting element (101); At least one of the light emitting device (100) and the light receiving device (200) is provided with an indication unit (300), and the indication unit (300) is configured to display status information, wherein the status information is used to indicate at least one of an alignment status and an operating status between the light receiving element (201) and the light emitting element (101).

2. The photoelectric sensor (10) according to claim 1, characterized in that The indicating unit (300) indicates the status information through at least one of character information and color information.

3. The photoelectric sensor (10) according to claim 1, characterized in that: The indication unit (300) comprises a first indication unit (310), wherein the first indication unit (310) has a first display state and a second display state; Wherein, when the light receiving element (201) receives the light emitted by the light emitting element (101), the first indicating unit (310) is in a first display state; when the light receiving element (201) does not receive the light emitted by the light emitting element (101), the first indicating unit (310) is in a second display state.

4. The photoelectric sensor (10) according to claim 3, characterized in that The light emitting device (100) comprises a plurality of light emitting modules (110), each of the light emitting modules (110) comprising at least one light emitting element (101); there are a plurality of first indicating units (310), each of the light emitting modules (110) being provided with at least one first indicating unit (310); and / or, The optical receiving device (200) comprises a plurality of optical receiving modules (210), each of the optical receiving modules (210) comprising at least one optical receiving element (201); there are a plurality of first indicating units (310), each of the optical receiving modules (210) being provided with at least one first indicating unit (310).

5. The photoelectric sensor (10) according to claim 1, characterized in that: The indication unit (300) comprises a second indication unit (320), wherein the second indication unit (320) is configured to display at least one mark, wherein the mark is used to indicate preset information.

6. The photoelectric sensor (10) according to claim 5, characterized in that The at least one identification is used to indicate at least one of the intensity of the light from the light emitting element (101) received by the light receiving element (201) and the fault information of the photoelectric sensor (10).

7. The photoelectric sensor (10) according to claim 5, characterized in that The second indication unit (320) has a display area (321), and the display area (321) is configured to display multiple identifications in sequence; or, the second indication unit (320) has multiple display areas (321), and the multiple display areas (321) are arranged along the first direction and respectively display multiple identifications.

8. The photoelectric sensor (10) according to any one of claims 1 to 7, characterized in that: The light emitting device (100) and the light receiving device (200) both comprise a housing (400) and a light-transmitting plate (500); the housing (400) has a housing cavity (401) extending along the first direction; the light emitting element (101) is arranged in the housing (400) of the light emitting device (100); and the light receiving element (201) is arranged in the housing (400) of the light receiving device (200); the housing cavity (401) has an opening (402); the light-transmitting plate (500) is connected to the housing (400) and is blocked at the opening (402); The indicating unit (300) is located in the accommodating cavity (401), and the display side of the indicating unit (300) faces the light-transmitting plate (500).

9. The photoelectric sensor (10) according to claim 8, characterized in that The shell (400) has a limiting portion (403), and the limiting portion (403) is located on both sides of the opening (402). The limiting portions (403) on both sides respectively form accommodation grooves with the two side edges of the opening (402), and the two sides of the light-transmitting plate (500) are respectively inserted into the accommodation grooves on both sides of the opening (402).

10. The photoelectric sensor (10) according to claim 8, characterized in that The shell (400) includes a shell body (410), a first end cover (420) and a second end cover (430); the shell body (410) is configured to form the accommodating cavity (401), and the accommodating cavity (401) is connected at both ends along the first direction; the first end cover (420) and the second end cover (430) are respectively connected to the two ends of the shell body (410) along the first direction.

11. The photoelectric sensor (10) according to claim 10, characterized in that The photoelectric sensor (10) further comprises a sealing member (440), wherein the sealing member (440) is arranged between the first end cover (420) and the housing body (410); and the sealing member (440) is arranged between the second end cover (430) and the housing body (410).

12. The photoelectric sensor (10) according to claim 11, characterized in that The sealing member (440) is arranged around the end edge of the shell body (410); the sealing member (440) has a protruding portion (441) on the side facing the opening (402), and the protruding portion (441) abuts against the end of the light-transmitting plate (500).

13. The photoelectric sensor (10) according to claim 10, characterized in that A threaded connection portion (450) formed integrally with the first end cover (420) is provided on a side facing away from the housing body (410), and the threaded connection portion (450) is configured to be connected to an external connector.

14. The photoelectric sensor (10) according to claim 5, characterized in that The second indicating unit (320) is arranged at the end of the light emitting device (100) or the light receiving device (200), and / or the identification display direction of the second indicating unit (320) is parallel to the length direction of the light emitting device (100) or the light receiving device (200).

15. The photoelectric sensor (10) according to claim 3, characterized in that The first indicating unit (310) is located between adjacent light emitting elements (101), or between adjacent light receiving elements (201).

16. The photoelectric sensor (10) according to claim 8, characterized in that The photoelectric sensor (10) further comprises a mounting bracket (600), wherein the mounting bracket (600) is arranged in the accommodating cavity (401); the mounting bracket (600) has a plurality of mounting grooves (601) arranged along the first direction, and the mounting grooves (601) are configured to accommodate the light emitting element (101) or the light receiving element (201).

17. The photoelectric sensor (10) according to claim 16, characterized in that The photoelectric sensor (10) further comprises a controller (700), wherein the controller (700) is disposed in the accommodating cavity (401); the controller (700) is located on a side of the mounting bracket (600) facing away from the light-transmitting plate (500), and the controller (700) is electrically connected to the light receiving element (201) or the light emitting element (101).

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