CN115839770A - Infrared induction probe - Google Patents
Infrared induction probe Download PDFInfo
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- CN115839770A CN115839770A CN202211654777.0A CN202211654777A CN115839770A CN 115839770 A CN115839770 A CN 115839770A CN 202211654777 A CN202211654777 A CN 202211654777A CN 115839770 A CN115839770 A CN 115839770A
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Abstract
An infrared inductive probe, comprising: the shell (1) is hollow, and an opening is formed in the side wall of one side of the shell (1); the infrared emission element (2) is arranged in the shell (1) and is opposite to the opening; the infrared receiving element (3) is arranged in the shell (1), arranged side by side with the infrared emitting element (2) and opposite to the opening; the optical filter (4) only used for infrared light to pass through is arranged in the opening of the shell (1) and shields the opening; the periphery of the opening of the shell (1) extends outwards relative to the side wall of the shell (1) where the opening is located to form a circle of flange (11), and an inwards-concave cavity (10) is formed between the flange (11) and the optical filter (4). Compared with the prior art, the problem of dark door plant response is bad can be solved to this application.
Description
Technical Field
The invention belongs to the technical field of sensors, and particularly relates to an infrared induction probe.
Background
The infrared sensing probe comprises a cylindrical shell, an infrared receiving unit and an infrared transmitting unit, wherein the infrared receiving unit and the infrared transmitting unit are arranged in the shell in an axial direction, and each unit forms the precise infrared photoelectric sensor through the shell, a filter arranged at the front end of the shell and a tail plug arranged at the rear end of the shell. The working principle of the sensor is as follows:
the infrared light emitted by the infrared emission unit penetrates through the filter mirror and then is emitted outwards, the infrared light irradiates to an object to be detected, the infrared light is reflected by the object to be detected and then is received by the infrared receiving unit, the infrared light is converted into an electric signal through a circuit, and a controller connected with the infrared sensing probe can emit a corresponding control signal according to the received electric signal.
The existing infrared sensing probe matched with the controller can control the lamp by detecting the opening and closing of the cabinet door. At this time, the cabinet door is the object to be detected, however, when the cabinet door is a dark door plate, the capability of reflecting light is weak, so that the function of the infrared sensing probe is abnormal.
In addition, the existing infrared inductive probe has the problem of parasitic interference, namely: the infrared part of infrared emission unit transmission can shine the inside wall of shell, reflects back infrared receiving element again for the condition of misjudgement appears in infrared inductive probe.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide an infrared sensing probe aiming at the current situation of the prior art so as to solve the problem of poor sensing of a dark door panel.
A second technical problem to be solved by the present invention is to provide an infrared sensing probe to reduce the parasitic interference caused by the reflected light of the housing.
The technical scheme adopted by the invention for solving the first technical problem is as follows: an infrared inductive probe, comprising:
the inner part of the shell is hollow, and the side wall of one side of the shell is provided with an opening;
the infrared emission element is arranged in the shell and is opposite to the opening;
the infrared receiving element is arranged in the shell, arranged side by side with the infrared emitting element and opposite to the opening;
the optical filter only allows infrared light to pass through is arranged in the opening of the shell and shields the opening;
the method is characterized in that:
the periphery of the opening of the shell extends outwards relative to the side wall of the shell where the opening is located to form a circle of flange, and an inwards concave cavity is formed between the flange and the optical filter.
Preferably, the housing is arranged to pass only infrared light and is integral with the filter. Thus, the housing can prevent interference of other light.
Preferably, the cavity is overall trumpet-shaped, with the small end facing inwards and the large end facing outwards.
In the above aspect, preferably, the housing is a cylindrical body as a whole, and the flange is located at an end of the cylindrical body. So, the tube-shaped body can directly insert and locate in the mounting hole of mounting panel, and the face at the hole edge place of flange and the mounting hole of mounting panel offsets up to, can realize the assembly of probe and mounting panel, and can play waterproof effect with the flange that the face of mounting panel offseted.
In order to further improve the waterproof effect, the waterproof device preferably further comprises a sealing ring which is sleeved on the side peripheral wall of the cylindrical body.
Further, the outer diameter of the cylindrical body is 9.8mm.
In each of the above solutions, to further solve the second technical problem, it is preferable that the light-shielding device further includes a light-shielding block disposed in the housing, and a first surface of the light-shielding block is opposite to the opening and is provided with an emitting hole and a receiving hole at intervals side by side; the infrared emitting element is constrained within the emitting aperture and the infrared receiving element is constrained within the receiving aperture.
Preferably, the receiving hole is a circular hole, the infrared receiving element is a cylindrical body and is axially inserted into the circular hole, and the lateral periphery of the infrared receiving element is adjacent to or attached to the hole wall of the circular hole.
Furthermore, the emitting hole is a non-circular hole, the edge of the emitting hole is provided with a first edge relatively close to the receiving hole and a second edge relatively far away from the receiving hole, the first edge and the second edge are oppositely arranged at intervals along the arrangement direction of the emitting hole and the receiving hole, and the distance between the first edge and the second edge is a;
the hole edge of the non-circular hole also comprises a third edge which is connected with the first edge and the second edge, the two third edges are oppositely arranged at intervals along the direction which is vertical to the arrangement direction of the transmitting hole and the receiving hole, and the distance between the two third edges is b;
b＞a；
the infrared emission element is a cylindrical body and is axially inserted into the non-circular hole, and the parts of the lateral peripheral surface of the infrared emission element, which are opposite to the first edge and the second edge of the non-circular hole, are adjacent to or attached to the corresponding edges of the non-circular hole; the portions of the side peripheral surface of the infrared emitting element opposite to the two third edges of the non-circular hole are away from the corresponding edges of the non-circular hole.
Adopt the circular port to do the receiving hole of infrared light in this application, adopt the non-circular port to do the emission hole of infrared light for infrared light ability launches from the non-circular port as much as possible, then receives from the circular port, so, the luminous angle of ruddiness emission component is adjusted to accessible adjustment shading piece at the ascending position of cylindricality body axial, and then reduces parasitic interference.
Compared with the prior art, the invention has the advantages that: set up the round flange through the uncovered edge at the casing, form inside sunken cavity between flange and the uncovered intraoral light filter, so, when infrared inductive probe's light filter set up towards the door plant, form a reflection of light cavity between cavity and the door plant to solve dark and even the bad problem of black door plant response.
By additionally arranging the shading block in the shell, the situation of parasitic interference can be effectively prevented.
Drawings
FIG. 1 is a schematic structural diagram of an embodiment of the present invention;
FIG. 2 is an exploded perspective view of an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an embodiment of the present invention;
FIG. 4 is a partial structural view of the embodiment of the present invention (with the housing omitted);
fig. 5 is a schematic structural view of the mounting plate of the embodiment of the present invention.
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 5, a preferred embodiment of an infrared inductive probe according to the present invention includes a housing 1, an infrared emitting element 2, an infrared receiving element 3, a filter 4, a sealing ring 5, and a light shielding block 6.
Wherein, the inside of the shell 1 is hollow and is a cylinder, and one end of the cylinder is provided with an opening. The filter 4 is disposed in the opening of the housing 1 to shield the opening and allow only infrared light to pass through. In this embodiment, the material of the housing 1 is the same as that of the filter 4, and the housing and the filter are an integral body. Meanwhile, the open periphery of the housing 1 extends outward relative to the filter 4 to form a ring of flanges 11, and a concave cavity 10 is formed between the flanges 11 and the filter 4. The cavity 10 is horn-shaped, and has a small end facing inward and opposite to the filter 4 and a large end facing outward.
The seal ring 5 is fitted around the side peripheral wall of the cylindrical body. And the outer diameter of the cylindrical body is 9.8mm.
The infrared emitting element 2 and the infrared receiving element 3 are arranged side by side in the housing 1, and are both opposite to the filter 4.
The light shielding block 6 is disposed in the housing 1, and a first surface of the light shielding block 6 is opposed to the filter 4, and is provided with emission holes 61 for confining the infrared emission elements 2 and reception holes 62 for confining the infrared reception elements 3 at intervals side by side. The receiving hole 62 is a circular hole, the infrared receiving element 3 is a cylindrical body and is axially inserted into the circular hole, and the lateral periphery of the infrared receiving element 3 is adjacent to or attached to the hole wall of the circular hole. The emitting hole 61 is a non-circular hole, the edge of the emitting hole has a first edge 611 relatively close to the receiving hole 62 and a second edge 612 relatively far away from the receiving hole 62, the first edge and the second edge are oppositely arranged at intervals along the arrangement direction of the emitting hole 61 and the receiving hole 62, and the distance between the first edge and the second edge is a; the hole edge of the non-circular hole further comprises a third edge 613 connecting the first edge and the second edge, the two third edges 613 are oppositely arranged at intervals along the direction perpendicular to the arrangement direction of the emitting hole 61 and the receiving hole 62, and the distance between the two third edges is b, and b is larger than a; the infrared emission element 2 is a cylindrical body and is axially inserted into the non-circular hole, and the parts of the lateral surface of the infrared emission element 2, which are opposite to the first edge and the second edge of the non-circular hole, are adjacent to or attached to the corresponding edges of the non-circular hole; a portion of the side circumferential surface of the infrared emitting element 2 opposite to the two third edges 613 of the non-circular hole is away from the corresponding edge of the non-circular hole.
In the present embodiment, the first edge 611 is a straight edge extending in a direction perpendicular to the arrangement direction of the emitting holes 61 and the receiving holes 62, and the second edge 612 is a circular arc edge and is convex outward with respect to the first edge. The two third edges 613 are both arc-shaped edges, and two ends of each third edge 613 are connected to the ends of the corresponding first and second edges.
The light shielding block 6 in this embodiment can separate the red light emitting element and the infrared receiving element. And adopt the circular port to do the receiving hole of infrared light, adopt the non-circular port to do the emission hole of infrared light for infrared light can launch from the non-circular port as much as possible, then receive from the circular port, so, the luminous angle of ruddiness emission element is adjusted to accessible adjustment shading piece at the ascending position of cylindricality body axial, and then comes the reduction parasitic interference.
The structure of infrared inductive probe assembly to mounting panel 7 is shown in fig. 5 in this embodiment, and mounting panel 7 is equipped with the pilot hole, and casing 1 of infrared inductive probe inserts along the axial and locates the pilot hole, and the mounting panel face at infrared inductive probe's flange 11 and pilot hole place offsets, and simultaneously, the sealing washer 5 of casing 1 periphery seals up with the pore wall of pilot hole and cooperates mutually to make the waterproof performance of sealing between infrared inductive probe and the mounting panel 7 preferred.
The infrared inductive probe assembled to the mounting plate 7 can be used for detecting the opening and closing conditions of the door plate to be detected, and the optical filter 4 on the infrared inductive probe is opposite to the plate surface of the door plate. At this moment, because the existence of cavity 10, form a reflection of light cavity between the face of cavity 10 and door plant, can solve dark colour and even the bad problem of black door plant response betterly.
Claims (9)
1. An infrared inductive probe, comprising:
the shell (1) is hollow, and an opening is formed in the side wall of one side of the shell (1);
the infrared emission element (2) is arranged in the shell (1) and is opposite to the opening;
the infrared receiving element (3) is arranged in the shell (1), arranged side by side with the infrared emitting element (2) and opposite to the opening;
the optical filter (4) only used for infrared light to pass through is arranged in the opening of the shell (1) and shields the opening;
the method is characterized in that:
the periphery of the opening of the shell (1) extends outwards relative to the side wall of the shell (1) where the opening is located to form a circle of flange (11), and an inwards concave cavity (10) is formed between the flange (11) and the optical filter (4).
2. The infrared sensing probe of claim 1, wherein: the housing (1) is arranged to pass only infrared light and is integral with the filter (4).
3. The infrared sensing probe of claim 1, wherein: the cavity (10) is horn-shaped as a whole, the small end of the cavity faces inwards, and the large end of the cavity faces outwards.
4. The infrared sensing probe of claim 3, wherein: the shell (1) is integrally cylindrical, and the flange (11) is located at the end of the cylindrical body.
5. The infrared sensing probe of claim 4, wherein: the sealing ring (5) is sleeved on the side peripheral wall of the cylindrical body.
6. The infrared sensing probe of claim 4, wherein: the outer diameter of the cylindrical body is 9.8mm.
7. The infrared sensing probe of any one of claims 1 to 6, wherein: the light shielding device is characterized by further comprising a light shielding block (6) arranged in the shell (1), wherein the first surface of the light shielding block (6) is opposite to the opening and is provided with an emitting hole (61) and a receiving hole (62) in a spaced mode in parallel; the infrared emitting element (2) is constrained within an emitting aperture (61) and the infrared receiving element (3) is constrained within a receiving aperture (62).
8. The infrared sensing probe of claim 7, wherein: the receiving hole (62) is a circular hole, the infrared receiving element (3) is a cylindrical body and is axially inserted into the circular hole, and the lateral peripheral surface of the infrared receiving element (3) is adjacent to or attached to the hole wall of the circular hole.
9. The infrared sensing probe of claim 7, wherein: the emitting hole (61) is a non-circular hole, the edge of the emitting hole is provided with a first edge (611) which is relatively close to the receiving hole (62) and a second edge (612) which is relatively far away from the receiving hole (62), the first edge and the second edge are oppositely arranged at intervals along the arrangement direction of the emitting hole (61) and the receiving hole (62), and the distance between the first edge and the second edge is a;
the hole edge of the non-circular hole also comprises a third edge (613) connected with the first edge and the second edge, the two third edges (613) are oppositely arranged at intervals along the direction vertical to the arrangement direction of the emitting hole (61) and the receiving hole (62), and the distance between the two third edges is b;
b＞a；
the infrared emission element (2) is a cylindrical body and is axially inserted into the non-circular hole, and the part of the lateral surface of the infrared emission element (2) opposite to the first edge and the second edge of the non-circular hole is adjacent to or attached to the corresponding edge of the non-circular hole; the portions of the lateral peripheral surface of the infrared emitting element (2) opposite to the two third edges (613) of the non-circular hole are distant from the corresponding edges of the non-circular hole.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211654777.0A CN115839770A (en) | 2022-12-20 | 2022-12-20 | Infrared induction probe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211654777.0A CN115839770A (en) | 2022-12-20 | 2022-12-20 | Infrared induction probe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN115839770A true CN115839770A (en) | 2023-03-24 |
Family
ID=85579050
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202211654777.0A Pending CN115839770A (en) | 2022-12-20 | 2022-12-20 | Infrared induction probe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN115839770A (en) |
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2022
- 2022-12-20 CN CN202211654777.0A patent/CN115839770A/en active Pending
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