CN216771973U - Phase distance measuring instrument - Google Patents
Phase distance measuring instrument Download PDFInfo
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- CN216771973U CN216771973U CN202220233867.1U CN202220233867U CN216771973U CN 216771973 U CN216771973 U CN 216771973U CN 202220233867 U CN202220233867 U CN 202220233867U CN 216771973 U CN216771973 U CN 216771973U
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Abstract
The utility model provides a phase distance measuring instrument, and relates to the technical field of distance detection. The phase distance meter provided by the utility model comprises: the device comprises a base, a lens cone, a first photosensitive element, a first light source and a second light source; the lens cone is arranged on the base, the first photosensitive element and the first light source are arranged on the base at intervals, the first photosensitive element and the first light source are positioned in the lens cone, and the second light source is arranged on the outer wall of the lens cone; the light beam emitted by the first light source is reflected by the lens barrel and transmitted to the first photosensitive element along the first light path, and the light path emitted by the second light source is transmitted to the first photosensitive element. The phase distance meter provided by the utility model solves the problems that the first light source on the existing phase distance meter is troublesome to install and is easy to burn by static electricity.
Description
Technical Field
The utility model relates to the technical field of distance detection, in particular to a phase distance meter.
Background
The phase type laser range finder indirectly measures the flight time of light between the round trip in the air and a target to be measured by measuring the phase delay generated by the round trip distance of continuous modulated light waves, thereby calculating the measured distance.
The phase type laser range finder is realized by the following steps: the high-frequency signal f1 is modulated on the semiconductor laser tube to generate continuous high-frequency changing bright and dark laser on the laser tube. The high-frequency signal f2 is modulated on the photodiode, the photodiode receives laser reflected by a measured target, the laser is subjected to frequency mixing and filtering by the photodiode to obtain low-frequency signals f1-f2, and the phase of the low-frequency signals (f1-f2) is calculated, so that the measured distance is calculated.
In the conventional double-transmitting single-receiving phase distance measuring instrument, the first light source is manually installed on the side wall of the lens barrel, and because the first light source has a certain distance from the two ends of the lens barrel, the first light source is troublesome to install, and the first light source usually adopts an electrostatic sensitive device, and is easily burnt by static electricity in the installation process.
SUMMERY OF THE UTILITY MODEL
The utility model aims to provide a phase distance measuring instrument, which aims to solve the problems that a first light source on the phase distance measuring instrument is troublesome to install and is easy to burn by static electricity in the prior art.
In order to solve the technical problems, the technical scheme provided by the utility model is as follows:
the phase distance meter provided by the embodiment of the utility model comprises a phase distance meter body; the device comprises a base, a lens cone, a first photosensitive element, a first light source and a second light source;
the lens cone is arranged on the base, the first photosensitive element and the first light source are arranged on the base at intervals, the first photosensitive element and the first light source are positioned in the lens cone, and the second light source is arranged on the outer wall of the lens cone;
the light beam emitted by the first light source is reflected by the lens barrel and transmitted to the first photosensitive element along the first light path, and the light path emitted by the second light source is transmitted to the first photosensitive element.
As a further technical solution, the lens barrel includes a first light reflecting portion;
the first light reflecting part is arranged at one end of the inner wall of the lens cone, which is close to the base, and forms an included angle with the base;
the light beam emitted by the first light source is reflected by the first light reflecting part and transmitted to the first photosensitive element along the first light path.
As a further technical solution, the first light source is a laser diode or an LED.
As a further technical scheme, the light path emitted by the second light source is a second light path, and the light beam of the second light path is reflected by the object to be measured and then emitted to the first photosensitive element.
As a further technical solution, the lens barrel further includes a second light reflecting portion;
the second light reflecting part is arranged at one end of the inner wall of the lens cone, which is far away from the base, and the light beam emitted by the second light source is reflected by the second light reflecting part and then enters the first photosensitive element.
As a further technical scheme, the radial size of the second light reflecting part increases from one end close to the base to one end far away from the base.
As a further technical scheme, the second light source is arranged on the outer wall of one end, deviating from the base, of the second light reflecting part.
As a further technical solution, the phase distance meter further comprises a lens;
the lens is arranged between the first photosensitive element and the object to be measured.
As a further technical solution, the lens is mounted in a lens barrel.
As a further aspect, the first photosensitive element comprises an avalanche photodiode.
Compared with the prior art, the phase distance meter provided by the utility model has the technical advantages that:
the phase distance meter provided by the utility model comprises; the device comprises a base, a lens cone, a first photosensitive element, a first light source and a second light source; the lens cone is arranged on the base, the first photosensitive element and the first light source are arranged on the base at intervals, the first photosensitive element and the first light source are positioned in the lens cone, and the second light source is arranged on the outer wall of the lens cone; the light beam emitted by the first light source is reflected by the lens barrel and transmitted to the first photosensitive element along the first light path, and the light path emitted by the second light source is transmitted to the first photosensitive element. When the phase distance measuring instrument is installed, the first light source is arranged on the base, the first light source can be installed on the base, then the base provided with the first light source is assembled with the lens cone, the first light source is convenient to install on the base, and the probability of being burnt by static electricity is reduced.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present invention or related technologies, the drawings used in the description of the embodiments or related technologies will be briefly introduced below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and other drawings can be obtained by those skilled in the art without creative efforts.
Fig. 1 is a schematic structural diagram of a phase distance meter according to an embodiment of the present invention.
An icon: 100-a base;
200-a lens barrel; 210-a first light reflecting portion; 220-a second light reflecting portion;
300-a first photosensitive element;
400-a first light source;
500-a second light source;
001-first optical path; 002-second optical path.
Detailed Description
The technical solutions of the present invention will be described clearly and completely with reference to the accompanying drawings, and it is to be understood that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, it need not be further defined or explained in subsequent figures.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, and are only for convenience of description and simplicity of description, but do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance. The term "physical quantity" in the formula, unless otherwise noted, is understood to mean a basic quantity of a basic unit of international system of units, or a derived quantity derived from a basic quantity by a mathematical operation such as multiplication, division, differentiation, or integration.
Furthermore, the terms "horizontal", "vertical", "overhang" and the like do not imply that the components are required to be absolutely horizontal or overhang, but may be slightly inclined. For example, "horizontal" merely means that the direction is more horizontal than "vertical" and does not mean that the structure must be perfectly horizontal, but may be slightly inclined.
In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, e.g., as meaning either a fixed connection, a removable connection, or an integral connection; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Some embodiments of the utility model are described in detail below with reference to the accompanying drawings. The embodiments described below and the features of the embodiments can be combined with each other without conflict.
The phase distance meter provided by the embodiment comprises: a base 100, a lens barrel 200, a first photosensor 300, a first light source 400, and a second light source 500;
the lens barrel 200 is installed on the base 100, the first light sensor 300 and the first light source 400 are arranged on the base 100 at an interval, the first light sensor 300 and the first light source 400 are located in the lens barrel 200, and the second light source 500 is arranged on the outer wall of the lens barrel 200;
the light beam emitted by the first light source 400 is reflected by the lens barrel 200 and transmitted to the first photosensitive element 300 along the first light path 001, and the light path emitted by the second light source 500 is transmitted to the first photosensitive element 300.
Specifically, as shown in fig. 1, the first photosensitive element 300 and the first light source 400 are disposed on the base 100 at an interval in the same direction, the lens barrel 200 is mounted at one end of the base 100 where the first photosensitive element 300 and the first light source 400 are disposed, and the second light source 500 is disposed on the outer wall of the lens barrel 200. The light beam emitted by the second light source 500, which is received by the first photosensitive element 300, can obtain a first detection distance; the first light source 400 receives the light beam from the first photosensitive element 300 to obtain the second detection distance, and both the first detection distance and the second detection distance can be obtained by analog-to-digital conversion. When the detection result is calculated, the first detection distance and the second detection distance can be differed, so that the influence of the temperature on the measurement result is eliminated, and an accurate distance measurement result is obtained. The light beam emitted by the first light source 400 irradiates the first photosensitive element 300, and then the working voltage of the first photosensitive element 300 under different temperature environments can be adjusted, so that the first photosensitive element 300 keeps the same amplification factor at any temperature. First light sensor 300, first light source 400 and second light source 500 mutually support, guarantee the accuracy that phase distance meter detected, and because first light source 400 installs in base 100, when assembling the phase distance meter, can install first light source 400 after base 100 earlier, install lens cone 200 in the one end that base 100 was provided with first light sensor 300 and first light source 400 again, make first light source 400 install more convenient, reduce the probability that first light source 400 was burnt by the static.
When the external temperature changes, if the working voltage of the first photosensitive element 300 is changed without depending on the light beam emitted by the first light source 400 to irradiate the first photosensitive element 300, so as to ensure the detection accuracy of the phase detector, another mode can be selected, as follows: when the external temperature changes, the first detection distance and the second detection distance both change and the change values are the same, and at this time, the second light source 500 is replaced, and the change values of the detection values generated by the temperature change are also different. The first photosensor 300 detects a first analog quantity of the light beam of the second light source 500 reflected by the object to be measured, the first photosensor 300 detects a second analog quantity of the light beam of the first light source 400, and the first analog quantity and the second analog quantity are differentiated, so that the influence of temperature on the measurement result can be eliminated. The specific adjusting mode can be selected at will on the premise of ensuring the detection accuracy of the phase meter.
In an optional technical solution of this embodiment, the lens barrel 200 includes a first light reflecting portion 210;
the first light reflecting part 210 is arranged at one end of the inner wall of the lens barrel 200 close to the base 100 and forms an included angle with the base 100, and the first light source 400 is attached to the base 100;
the light beam emitted by the first light source 400 is reflected by the first light reflecting portion 210 and transmitted to the first photosensitive element 300 along the first light path 001.
First light source 400 accessible SMT machine pastes in base 100, realizes automatic welding laminating through the machine, has simplified the complicated mounting means of current manual equipment greatly, has reduced the probability that static damaged when having saved the equipment expense.
Specifically, as shown in fig. 1, the first light reflecting portion 210 is mounted on the inner wall of the lens barrel 200, and since the first photosensitive element 300 and the first light source 400 are arranged on the base 100 at an interval in the same direction, in order to ensure that the light beam emitted by the first light source 400 is reflected by the first light reflecting portion 210 and can smoothly enter the first photosensitive element 300, the first light reflecting portion 210 and the base 100 are arranged at an acute angle, that is, the first light reflecting portion 210 and the upper end surface of the first photosensitive element 300 are arranged at an acute angle; the reflection direction of the light beam emitted by the first light source 400 can be changed through the first light reflecting portion 210, the size of the included angle between the first light reflecting portion 210 and the base 100 can be changed according to specific requirements, or the distance between the first light source 400 and the first photosensitive element 300 can be changed, so that the accuracy of the detection result of the phase distance meter can be ensured. The first light source 400 is attached to the base 100 through standardized equipment, manual assembly is not needed, assembly cost is saved, and when the phase distance meter is assembled, the first light source 400 can be firstly installed on the base 100, and then the lens barrel 200 is installed on one end of the base 100, which is provided with the first photosensitive element 300 and the first light source 400, so that the first light source 400 is convenient to install, and the probability that the first light source 400 is burnt by static electricity is reduced.
In an optional technical solution of this embodiment, the first light source 400 is a laser diode or an LED.
Specifically, as shown in fig. 1, when the first light source 400 is a laser diode, the voltage signal with phase information is modulated on the first light source 400 and the second light source 500, so that the first light source 400 and the second light source 500 emit light beams with phase information; the light beam of the second light source 500 is irradiated on the surface of the object to be measured, reflected back and received by the first photosensitive element 300, and the distance of the signal output by the first photosensitive element 300 converted by the amplifying circuit and the ADC is recorded as D1; the light beam emitted by the first light source 400 is reflected by the first light reflecting part 210 and then received by the first photosensitive element 300, and the distance converted by the amplifying circuit and the ADC is recorded as D2; and D1-D2. When the temperature changes, D1 ═ D1+ D, D2 ═ D2+ D, and the final distance D ═ D1+ D) - (D2+ D) ═ D1-D2, D remained unchanged.
The first light source 400 is a device selected according to the requirement or application situation, so as to achieve the technical purpose of detecting the distance by the phase distance meter.
In an optional technical solution of this embodiment, a light path emitted by the second light source 500 is a second light path 002, and a light beam of the second light path 002 is reflected by the object to be measured and then emitted to the first photosensitive element 300.
Specifically, as shown in fig. 1, the light beam emitted by the second light source 500 is the light beam received by the first photosensitive element 300 through the second light path 002, so that the first detection distance can be obtained, the light beam received by the first photosensitive element 300 by the first light source 400 can be the second detection distance, both the first detection distance and the second detection distance can be obtained through analog-to-digital conversion, and when the detection result is calculated, the difference between the first detection distance and the second detection distance can be made, so that the influence of the temperature on the measurement result is eliminated, thereby obtaining an accurate distance measurement result, and ensuring the accuracy of the detection result of the phase distance meter.
In an optional technical solution of this embodiment, the lens barrel 200 further includes a second light reflecting portion 220;
the second light reflecting portion 220 is disposed at an end of the inner wall of the lens barrel 200 away from the base 100, and the light beam emitted by the second light source 500 is reflected by the second light reflecting portion 220 and then enters the first light sensor 300.
Specifically, as shown in fig. 1, the light beam of the second light path 002 is incident into the lens barrel 200, and is reflected by the second reflecting portion 220, so that after the propagation path of the light beam of the second light path 002 is changed, the light beam of the second light path 002 is incident into the first photosensitive element 300, and the technical effect of the phase distance meter is ensured.
In an optional technical solution of this embodiment, the phase distance meter further includes a lens;
the lens is disposed between the first photosensitive element 300 and the object to be tested.
The lens is mounted in the lens barrel 200.
Specifically, as shown in fig. 1, a lens is disposed between the first photosensitive element 300 and the object to be measured, and the lens may be a convex lens or a concave lens, in this application, the lens is a convex lens, and the convex lens is arranged to protrude in a direction away from the first photosensitive element 300; set up convex lens in lens cone 200, convex lens's lateral wall and lens cone 200's inner wall butt guarantee when detecting with first photosensitive element 300's relative position fixed, promote phase range finder's stability and testing result's accuracy. At the same time, the lens has a light-gathering function, which can ensure that the light beam is fully received by the first photosensitive element 300.
In an optional technical solution of this embodiment, the radial dimension of the second light reflecting portion 220 increases from the end close to the base 100 to the end away from the base 100.
Specifically, as shown in fig. 1, when the light beam emitted by the second light source 500 passes through the lens and gradually enters the first photosensitive element 300 along the inner cavity of the lens barrel 200, in the process, as the radial dimension of the second light reflecting portion 220 gradually decreases from the end away from the base 100 to the end close to the base 100, the light beam emitted by the second light source 500 gradually converges toward the circumferential direction of the lens barrel 200, and the converged light beam is received by the first photosensitive element 300, thereby ensuring the detection effect of the phase distance meter.
In an optional technical solution of this embodiment, the second light source 500 is disposed on an outer wall of one end of the second light reflecting portion 220 departing from the base 100.
Specifically, as shown in fig. 1, the second light source 500 is fixedly disposed opposite to the outer wall of the second light reflecting portion 220, and the second light source 500 is disposed at an end of the second light source 500 away from the base 100. Because the radial dimension of second reflection of light portion 220 reduces from the one end that deviates from base 100 to the one end that is close to base 100 gradually, second light source 500 sets up in the one end that second light source 500 deviates from base 100 when using, avoid the outer wall of second reflection of light portion 220 to shelter from the light beam that partial second light source 500 sent, guarantee phase range finder's monitoring effect, the outer wall relative position of second light source 500 and second reflection of light portion 220 sets up simultaneously, guarantee the stability of phase range finder when using, promote the accuracy of testing result.
In an optional solution of this embodiment, the first photosensitive element 300 includes an avalanche photodiode.
Specifically, the first photosensor 300 converts an optical signal into an electrical signal by means of an avalanche photodiode, and obtains an analog quantity of a distance signal by detecting a voltage signal. The high-frequency signal generated by the local oscillation circuit is communicated with the first photosensitive element 300, the high-frequency signal generated by the main oscillation circuit is communicated with the second light source 500, the light beam of the second light source 500 is transmitted along the second light path 002, the light beam reflected by the measured object is received by the first photosensitive element 300, the first photosensitive element 300 is connected with the electronic switch, the electronic switch is connected with the signal processing circuit, the signal processing circuit is used for carrying out operational amplification and filtering processing, and the analog-to-digital conversion module in the single chip microcomputer is used for converting the processed analog signal into a distance numerical value signal.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the utility model has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (10)
1. A phase rangefinder, comprising: the device comprises a base (100), a lens barrel (200), a first photosensitive element (300), a first light source (400) and a second light source (500);
the lens barrel (200) is mounted on the base (100), the first photosensitive element (300) and the first light source (400) are arranged on the base (100) at intervals, the first photosensitive element (300) and the first light source (400) are located in the lens barrel (200), and the second light source (500) is arranged on the outer wall of the lens barrel (200);
the light beam emitted by the first light source (400) is reflected by the lens barrel (200) and transmitted to the first photosensitive element (300) along a first light path (001), and the light path emitted by the second light source (500) is transmitted to the first photosensitive element (300).
2. The phase distance meter according to claim 1, wherein the lens barrel (200) comprises a first light reflecting portion (210);
the first light reflecting part (210) is arranged at one end, close to the base (100), of the inner wall of the lens barrel (200) and forms an included angle with the base (100), and the first light source (400) is attached to the base (100);
the light beam emitted by the first light source (400) is reflected by the first light reflecting part (210) and transmitted to the first photosensitive element (300) along a first light path (001).
3. The phase distance meter according to claim 2, characterized in that the first light source (400) is a laser diode or an LED.
4. The phase-distance meter according to claim 1, characterized in that the light path emitted by the second light source (500) is a second light path (002), and the light beam of the second light path (002) is reflected by the object to be measured and directed to the first photosensitive element (300).
5. The phase distance meter according to claim 4, wherein the lens barrel (200) further comprises a second light reflecting portion (220);
the second light reflecting portion (220) is disposed at an end of the inner wall of the lens barrel (200) away from the base (100), and a light beam emitted by the second light source (500) is reflected by the second light reflecting portion (220) and then enters the first photosensitive element (300).
6. The phase distance meter according to claim 5, characterized in that the radial dimension of the second light reflecting portion (220) increases from the end close to the base (100) to the end facing away from the base (100).
7. The phase distance meter according to claim 5, wherein the second light source (500) is disposed on an outer wall of the second light reflecting portion (220) at an end facing away from the base (100).
8. The phase rangefinder of claim 4, further comprising a lens;
the lens is arranged between the first photosensitive element (300) and the object to be tested.
9. The phase distance meter according to claim 8, characterized in that the lens is mounted within the barrel (200).
10. The phase distance meter according to claim 1, characterized in that the first photosensitive element (300) comprises an avalanche photodiode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220233867.1U CN216771973U (en) | 2022-01-26 | 2022-01-26 | Phase distance measuring instrument |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202220233867.1U CN216771973U (en) | 2022-01-26 | 2022-01-26 | Phase distance measuring instrument |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216771973U true CN216771973U (en) | 2022-06-17 |
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ID=81978893
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202220233867.1U Active CN216771973U (en) | 2022-01-26 | 2022-01-26 | Phase distance measuring instrument |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216771973U (en) |
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2022
- 2022-01-26 CN CN202220233867.1U patent/CN216771973U/en active Active
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