CN217332834U - Laser probe capable of preventing self-excitation induction - Google Patents
Laser probe capable of preventing self-excitation induction Download PDFInfo
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- CN217332834U CN217332834U CN202220593426.2U CN202220593426U CN217332834U CN 217332834 U CN217332834 U CN 217332834U CN 202220593426 U CN202220593426 U CN 202220593426U CN 217332834 U CN217332834 U CN 217332834U
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Abstract
The utility model relates to a laser probe field relates to a prevent laser probe of auto-excitation response especially. The utility model discloses a prevent laser probe of auto-excitation response, including the impervious probe shell, separate light cover and laser detection subassembly, the laser detection subassembly includes laser emitter and light sensor, separate the light cover and set up on laser emitter and light sensor, separate the light cover and be equipped with first unthreaded hole and the light inlet hole that corresponds to laser emitter and light sensor respectively, the probe clamshell is established outside laser detection subassembly and light cover, be equipped with first printing opacity portion and second printing opacity portion on the probe shell, first printing opacity portion sets up with second printing opacity portion interval, first printing opacity portion and second printing opacity portion are corresponding to first unthreaded hole and light inlet hole respectively. The utility model discloses laser probe's auto-excitation problem has been improved greatly, has increased laser probe to the interference killing feature such as probe shell surface friction, greasy dirt, and simple structure, easily realizes.
Description
Technical Field
The utility model belongs to the laser probe field specifically relates to a laser probe who prevents auto-excitation response.
Background
The laser probe is a non-contact measuring probe based on the principle of optical triangulation, has the advantages of simple and flexible structure, small volume, light weight, high precision, low cost and no special requirement on environment, and is widely applied to the fields of industrial online detection, robot vision, three-dimensional size measurement of objects, contour formation and the like.
A probe shell of a common laser probe in the market generally adopts a light-transmitting probe shell, laser emitted by the laser probe is emitted out of the probe shell through the probe shell and is reflected by a detected target, and then enters an optical sensor in the probe shell through the probe shell to be received, the laser emitted by the laser probe is reflected on the surface of the probe shell, particularly when interference factors such as friction, oil stain and the like exist on the surface of the probe shell, the reflection is more obvious, and the reflected light can be transmitted into a light inlet channel of the optical sensor through the probe shell and is received by the optical sensor, so that the defect of self-excitation is generated.
Disclosure of Invention
An object of the utility model is to provide a laser probe who prevents self-excitation response is used for solving the technical problem that above-mentioned exists.
In order to achieve the above object, the utility model adopts the following technical scheme: the utility model provides a prevent laser probe of auto-excitation response, including the adiactinic probe shell, separate light cover and laser detection subassembly, the laser detection subassembly includes laser emitter and light sensor, it sets up on laser emitter and light sensor to separate the light cover, it is equipped with first light outlet and light inlet corresponding to laser emitter and light sensor respectively to separate the light cover, the probe shell cover is established outside laser detection subassembly and light cover, be equipped with first printing opacity portion and second printing opacity portion on the probe shell, first printing opacity portion sets up with second printing opacity portion interval, first printing opacity portion and second printing opacity portion are corresponding to first light outlet and light inlet respectively.
Furthermore, the first light transmission part and the second light transmission part are both made of transparent materials.
Furthermore, the first light transmission part and the second light transmission part are both realized by adopting lenses, the front wall of the probe shell is provided with a mounting through hole, and the lenses are mounted in the mounting through holes.
Furthermore, the outer periphery of the inner end part of the lens is also provided with an extension part which extends outwards in the radial direction, the outer periphery of the inner end part of the mounting through hole is provided with a sinking groove, and the extension part is arranged in the sinking groove.
Furthermore, the first light outlet hole and the light inlet hole are both tapered holes, the size of the first light outlet hole is gradually increased from the laser emitter to the first light transmission part, and the size of the light inlet hole is gradually increased from the optical sensor to the second light transmission part.
Furthermore, a first convex ring is arranged on the end face of the first light outlet hole facing the first light transmission part, and the first convex ring is tightly abutted against the first light transmission part.
Furthermore, a second convex ring is arranged on the end face, facing the second light transmission part, of the light inlet hole, and the second convex ring is tightly abutted to the second light transmission part.
Furthermore, the laser detection assembly further comprises a circuit board, the laser emitter and the optical sensor are arranged on the circuit board, and the circuit board is clamped in the probe shell.
Furthermore, the circuit board is further provided with an indicator light, the light isolation sleeve is provided with a second light outlet hole, the second light outlet hole covers the indicator light, the probe shell is provided with a third light-transmitting part, the third light-transmitting part is respectively arranged at intervals with the first light-transmitting part and the second light-transmitting part, and the third light-transmitting part corresponds to the second light outlet hole.
Further, the third light-transmitting portion is implemented by using a lens.
The utility model has the advantages of:
the utility model discloses an adopt the first printing opacity portion of adiactinic and second printing opacity portion of spaced to carry out light-emitting and advance light on the probe shell, improved laser probe's auto-excitation problem greatly, increased the interference killing feature of laser probe to interference factors such as probe shell surface friction, greasy dirt, and simple structure, easily realization.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to these drawings without creative efforts.
FIG. 1 is a block diagram of an embodiment of the present invention;
FIG. 2 is a block diagram of another perspective of an embodiment of the present invention;
FIG. 3 is a cross-sectional view of an embodiment of the present invention;
fig. 4 is an exploded view of an embodiment of the present invention;
FIG. 5 is a block diagram of an omitted probe housing according to an embodiment of the present invention;
fig. 6 is a structural diagram of a probe housing according to an embodiment of the present invention.
Detailed Description
To further illustrate the embodiments, the present invention provides the accompanying drawings. The accompanying drawings, which are incorporated in and constitute a part of this disclosure, illustrate embodiments of the invention and, together with the description, serve to explain the principles of the embodiments. With these references, one of ordinary skill in the art will appreciate other possible embodiments and advantages of the present invention. Elements in the figures are not drawn to scale and like reference numerals are generally used to indicate like elements.
The present invention will now be further described with reference to the accompanying drawings and detailed description.
As shown in fig. 1-6, a laser probe for preventing self-excitation induction includes a light-tight probe shell 1, a light-blocking sleeve 2 and a laser detection assembly 3, where the laser detection assembly 3 includes a laser emitter 31 and a light sensor 32, the light-blocking sleeve 2 covers the laser emitter 31 and the light sensor 32, the light-blocking sleeve 2 is provided with a first light outlet 21 and a light inlet 22 corresponding to the laser emitter 31 and the light sensor 32, respectively, that is, the laser emitter 31 faces the first light outlet 21, the light sensor 32 faces the light inlet 22, and the probe shell 1 covers the laser detection assembly 3 and the light-blocking sleeve 2. The rear wall of the probe housing 1 (with reference to fig. 3 as a direction, the left direction is the rear of the probe housing 1, and the right direction is the front of the probe housing 1) is opened, so as to facilitate the assembly of the laser probe, but the invention is not limited thereto.
In this embodiment, the probe casing 1 is preferably made of black plastic, such as black PC plastic (polycarbonate), and is formed by injection molding, and has a simple structure and good light-proof effect.
The front wall of the probe housing 1 is provided with a first light transmission part 11 and a second light transmission part 12, the first light transmission part 11 and the second light transmission part 12 are arranged at intervals, namely the first light transmission part 11 and the second light transmission part 12 are separated by the body of the probe housing 1, so that light of the first light transmission part 11 cannot be transmitted to the second light transmission part 12 through the body of the probe housing 1, the first light transmission part 11 and the second light transmission part 12 respectively correspond to a first light outlet hole 21 and a light inlet hole 22, namely the first light transmission part 11 and the second light transmission part 12 respectively face the first light outlet hole 21 and the light inlet hole 22.
In this embodiment, the first light-transmitting portion 11 and the second light-transmitting portion 12 are both made of transparent materials, so that the light-transmitting loss is small, and the detection sensitivity of the laser probe is improved.
Preferably, in this embodiment, the first light transmission part 11 and the second light transmission part 12 are both implemented by using lenses, so that the light transmission is better, and the detection sensitivity of the laser probe is improved. Specifically, the first light transmission part 11 is implemented by the first lens 111, the second light transmission parts 12 are implemented by the second lens 121, the front wall of the probe housing 1 is provided with the first mounting through hole 110 and the second mounting through hole 120 which are spaced apart from each other, and the first lens 111 and the second lens 121 are respectively mounted in the first mounting through hole 110 and the second mounting through hole 120.
In this embodiment, the first lens 111 and the second lens 121 are made of plastic material, which is not easy to damage and has low cost, and in some embodiments, the first lens 111 and the second lens 121 may also be made of other materials such as glass.
Further, in this embodiment, the outer peripheral edges of the inner ends (i.e., the rear ends) of the first lens 111 and the second lens 121 are further provided with extending portions 1111 and 1211 extending radially outward, the outer peripheral edges of the inner ends of the first through hole 110 and the second through hole 120 are provided with the sunken grooves 1101 and 1201, and the extending portions 1111 and 1211 are respectively disposed in the sunken grooves 1101 and 1201, so that the stability of mounting the first lens 111 and the second lens 121 is improved, the first lens and the second lens are prevented from being separated from the front of the probe shell 1, and the structure is compact.
In this embodiment, the first light exit hole 21 and the light entrance hole 22 are both tapered holes, the size of the first light exit hole 21 gradually increases from the laser emitter 31 to the first light transmission portion 11, and the size of the light entrance hole 22 gradually increases from the optical sensor 32 to the second light transmission portion 12, so that the sensing area range is increased. More preferably, the first light outlet hole 21 and the light inlet hole 22 are conical holes, so that the structure is simple and compact, and the implementation is easy.
In this embodiment, the end surface of the first light exit hole 21 facing the first light transmission portion 11 is provided with a first protruding ring 211, and the first protruding ring 211 is tightly abutted against the first light transmission portion 11, so as to further improve the light sealing effect of the first light exit hole 21 and avoid the light leakage from affecting the measurement effect.
The end surface of the light inlet hole 22 facing the second light transmission part 21 is provided with a second convex ring 221, and the second convex ring 221 is tightly abutted against the second light transmission part 12, so that the light sealing effect of the light inlet hole 22 is further improved, and the influence of interference light on the measurement effect is avoided.
The laser detection assembly 3 further includes a circuit board 33, and the laser emitter 31 and the optical sensor 32 are disposed on the circuit board 33, in this embodiment, the laser detection assembly 3 is a TOF (time of flight) laser ranging assembly, and the distance (distance: photon time of flight/2 × optical speed) is obtained by calculating the round-trip time of the photon and the optical speed, which is more specific, reference may be made to the prior art, which is not to be described in detail, but is not limited thereto.
In this embodiment, circuit board 33 joint sets up in probe shell 1, and the dismouting is convenient, and is specific, and two inside walls along its length direction of probe shell 1 are equipped with a fixture block 14 respectively, and circuit board 33 passes through fixture block 14 card and establishes and fix in probe shell 1, and circuit board 33 compresses tightly on light blocking sleeve 2, and the steadiness is good after the joint, nevertheless does not limit to this, and in some embodiments, circuit board 33 also can adopt other fixed knot that have now to construct and fix in probe shell 1.
In this embodiment, the circuit board 33 is further provided with an indicator lamp 34, the light isolation sleeve 2 is provided with a second light outlet 23, the second light outlet 23 covers the indicator lamp 34, the probe housing 1 is provided with a third light transmission portion 13, and the third light transmission portion 13 is separately provided with the first light transmission portion 11 and the second light transmission portion 12, that is, the first light transmission portion 11, the second light transmission portion 12 and the third light transmission portion 13 are separated by the body of the probe housing 1, so that the light of the first light transmission portion 11 and the third light transmission portion 13 cannot be transmitted to the second light transmission portion 12 through the body of the probe housing 1. The third light transmission part 13 corresponds to the second light exit hole 23, that is, the third light transmission part 13 faces the second light exit hole 23, and the light emitted from the indicator lamp 34 is transmitted to the third light transmission part 13 through the second light exit hole 23 and then emitted through the third light transmission part 13 for indication.
Preferably, in this embodiment, the third light transmission section 13 is implemented by using the third lens 131, and has a better light transmission property. The front wall of the probe housing 1 is provided with a third mounting through hole 130, and the third lens 131 is mounted in the third mounting through hole 130.
In this embodiment, the third lens 131 is made of plastic material, which is not easy to damage and has low cost, and in some embodiments, the third lens 131 may also be made of other materials such as glass.
Further, in this embodiment, the outer peripheral edge of the inner end (i.e., the rear end) of the third lens 131 is further provided with an extension 1311 extending radially outward, the outer peripheral edge of the inner end of the third mounting through hole 130 is provided with a sinking groove 1301, and the extension 1311 is disposed in the sinking groove 1301, so that the mounting stability of the third lens 131 is improved, the third lens is prevented from being removed from the front of the probe housing 1, and the structure is compact.
In this embodiment, the end surface of the second light outlet 23 facing the third light transmission portion 13 is provided with a third protruding ring 231, and the third protruding ring 231 is tightly abutted against the third light transmission portion 13, so as to further improve the light sealing effect of the third protruding ring 231 and avoid the light leakage from affecting the measurement effect.
The measurement principle is as follows:
laser emitted by the laser emitter 31 is emitted through the first light-emitting hole 21, and then is emitted out of the probe shell 1 through the first lens 111, and after being reflected by a detected target, the laser enters the light-entering hole 22 through the second lens 121, and is transmitted to the optical sensor 32 through the light-entering hole 22 to be received, and the circuit board 33 realizes distance measurement (distance is the photon flight time/2 light speed) through calculation of the photon flight back-and-forth time and light speed. The light reflected by the laser on the surface of the first lens 111 is blocked by the opaque probe shell 1, and cannot be transmitted to the second lens 121 and further transmitted to the optical sensor 32 through the light inlet hole 22, so that the self-excitation problem of the laser probe is greatly improved, and the anti-interference capability of the laser probe on interference factors such as friction on the surface of the probe shell, oil stains and the like is improved.
While the invention has been particularly shown and described with reference to a preferred embodiment, it will be understood by those skilled in the art that various changes in form and detail may be made therein without departing from the spirit and scope of the invention as defined by the appended claims.
Claims (10)
1. A laser probe for preventing self-excitation induction is characterized in that: including the lighttight probe shell, separate light cover and laser detection subassembly, the laser detection subassembly includes laser emitter and light sensor, separate the light cover and set up on laser emitter and light sensor, separate the light cover and be equipped with first light-emitting hole and the light inlet hole that corresponds to laser emitter and light sensor respectively, the probe shell cover is established outside laser detection subassembly and separate the light cover, be equipped with first printing opacity portion and second printing opacity portion on the probe shell, first printing opacity portion sets up with second printing opacity portion interval, first printing opacity portion and second printing opacity portion are corresponding to first light-emitting hole and light inlet hole respectively.
2. The self-excitation induction preventing laser probe according to claim 1, characterized in that: the first light transmission part and the second light transmission part are both made of transparent materials.
3. The self-excitation induction preventing laser probe according to claim 2, characterized in that: the first light transmission part and the second light transmission part are both realized by adopting lenses, the front wall of the probe shell is provided with a mounting through hole, and the lenses are mounted in the mounting through hole.
4. The self-excitation induction preventing laser probe according to claim 3, characterized in that: the outer periphery of the inner end part of the lens is also provided with an extension part which extends outwards in the radial direction, the outer periphery of the inner end part of the mounting through hole is provided with a sinking groove, and the extension part is arranged in the sinking groove.
5. The self-excitation induction preventing laser probe according to claim 1, characterized in that: the first light outlet hole and the light inlet hole are both conical holes, the size of the first light outlet hole is gradually increased from the laser emitter to the first light transmission part, and the size of the light inlet hole is gradually increased from the optical sensor to the second light transmission part.
6. The self-excitation induction preventing laser probe according to claim 5, characterized in that: and a first convex ring is arranged on the end surface of the first light outlet hole facing the first light transmission part, and the first convex ring is tightly abutted against the first light transmission part.
7. The self-excitation induction preventing laser probe according to claim 5, characterized in that: and a second convex ring is arranged on the end surface of the light inlet hole facing the second light transmission part, and the second convex ring is tightly abutted against the second light transmission part.
8. The self-excitation induction preventing laser probe according to claim 1, characterized in that: the laser detection assembly further comprises a circuit board, the laser emitter and the optical sensor are arranged on the circuit board, and the circuit board is clamped and connected in the probe shell.
9. The self-excitation induction preventing laser probe according to claim 8, characterized in that: the circuit board is also provided with an indicator light, the light isolation sleeve is provided with a second light outlet hole, the second light outlet hole covers the indicator light, the probe shell is provided with a third light-transmitting part, the third light-transmitting part is respectively arranged at intervals with the first light-transmitting part and the second light-transmitting part, and the third light-transmitting part corresponds to the second light outlet hole.
10. The self-excitation induction preventing laser probe according to claim 9, characterized in that: the third light transmission part is realized by adopting a lens.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220593426.2U CN217332834U (en) | 2022-03-18 | 2022-03-18 | Laser probe capable of preventing self-excitation induction |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220593426.2U CN217332834U (en) | 2022-03-18 | 2022-03-18 | Laser probe capable of preventing self-excitation induction |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN217332834U true CN217332834U (en) | 2022-08-30 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220593426.2U Active CN217332834U (en) | 2022-03-18 | 2022-03-18 | Laser probe capable of preventing self-excitation induction |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN217332834U (en) |
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2022
- 2022-03-18 CN CN202220593426.2U patent/CN217332834U/en active Active
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