CN221925380U - A coaxial aiming infrared thermometer - Google Patents

Abstract

The utility model relates to the technical field of laser detection, in particular to an infrared thermometer coaxially aimed. According to the coaxial aiming infrared thermometer, on the premise that the traditional optical structure of the infrared thermometer is not changed, the LED light sources which are annularly arranged are additionally arranged behind the infrared temperature measuring probe, a circle of annular channels are formed at the edge of the temperature measuring channel of the middle infrared thermometer and serve as the LED light source channels, and a circle of annular light rays are formed after LED light is transmitted, so that the coaxial aiming function is realized. The coaxial aiming device is simple in structure, realizes innovative coaxial aiming, and greatly reduces design and production cost.

Description

A coaxial aiming infrared thermometer

Technical Field

The utility model relates to the technical field of laser detection, in particular to a coaxially aimed infrared temperature measuring instrument.

Background Art

At present, most infrared measuring instruments use laser aiming. Common aiming methods include point laser and line laser, among which point laser is the most widely used. The most common aiming point features are: single point or double point form, cross-line crossing (generally used for line laser) and multi-point or single point laser passing through special lenses. There are also products using these two forms.

Most infrared thermometers (temperature guns) on the market use a single-point laser structure. The laser is installed just above or just below the infrared probe. The laser optical axis and the infrared probe optical axis are not on the same axis. They can achieve auxiliary aiming, but cannot achieve accurate aiming. Some high-end infrared thermometers or temperature guns use a dual-laser structure to achieve precise aiming. A laser is added on the other side of the original single laser. The center or intersection of the two lasers is used as the aiming center. This greatly improves the accuracy of aiming and realizes the coaxial aiming function, but it is not true coaxial aiming, and the structure is complex. The production cost, including the material cost, is relatively high.

Utility Model Content

The utility model aims to provide an infrared thermometer with a simple structure and capable of realizing coaxial aiming, in view of the problems of inaccurate aiming and high cost in the prior art.

In order to achieve the above-mentioned purpose, the technical solution adopted by the utility model is as follows.

A coaxially aimed infrared thermometer comprises a thermometer body and an infrared temperature measuring probe. An LED light source is arranged around the infrared temperature measuring probe. The light of the LED light source forms a ring light with the infrared temperature measuring probe as the center.

As a further technical solution, the LED light source is located at the rear end of the infrared temperature measuring probe and arranged in a circular array. The circular array takes the projection of the infrared temperature measuring probe on the plane where the circular array is located as the center, and the area of the circular array is larger than the projection area of the infrared temperature measuring probe.

As a further technical solution, the light outlet of the infrared temperature measuring probe is provided with an annular beam limiter concentric with the infrared temperature measuring probe, and the beam limiter includes a first light shielding portion and an annular channel. The first light shielding portion is concentric with the annular channel, and the inner diameter is larger than the outer diameter of the annular channel. The light from the LED light source forms an annular light after passing through the annular channel.

As a further technical solution, the inner diameter of the annular channel is interference-fitted with the outer side of the lens barrel, and the annular beam limiter is sleeved on the outer side of the lens barrel.

As a further technical solution, the beam limiter further includes a second light shielding portion, and an outer diameter of the second light shielding portion is smaller than an inner diameter of the annular channel.

As a further technical solution, the inner diameter of the second light shielding portion is interference-fitted with the outer side of the lens barrel, so that the annular beam limiter is sleeved on the outer side of the lens barrel.

As a further technical solution, it also includes a base, which is arranged at the end of the lens barrel where the infrared temperature measuring probe is located, and the LED light sources are arranged in a circular array on the base.

As a further technical solution, the base and the lens barrel are connected by one or more of screw connection, clamp connection, bonding, and nail connection.

Compared with the prior art, the utility model has the following beneficial effects:

The coaxial aiming infrared thermometer of the utility model, without changing the traditional optical structure of the infrared thermometer, adds a circularly arranged LED light source behind the infrared temperature measuring probe, forms a circle of circular channel at the edge of the temperature measuring channel of the middle infrared thermometer as the LED light source channel, and forms a circle of circular light after the LED light passes through, realizing the function of coaxial aiming. The utility model has a simple structure, and greatly reduces the design and production costs while realizing innovative coaxial aiming.

BRIEF DESCRIPTION OF THE DRAWINGS

The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present application. The exemplary embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention. In the drawings:

Fig. 1 is a schematic structural diagram of a coaxially aimed infrared thermometer according to Embodiment 1;

FIG. 2 is a side view of the coaxially aimed infrared thermometer of Example 1.

Figure symbols: 1-infrared temperature measuring probe, 2-LED light source, 3-annular channel, 4-beam limiter, 5-lens barrel, 6-base.

DETAILED DESCRIPTION

In order to make the purpose, technical solutions and advantages of the utility model more clearly understood, the utility model is further described in detail below in conjunction with embodiments and drawings. The schematic implementation manner of the utility model and its description are only used to explain the utility model and are not intended to limit the utility model.

It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it may be directly on the other element or there may be an intermediate element at the same time. When an element is referred to as being "connected to" another element, it may be directly connected to the other element or there may be an intermediate element at the same time. When an element is referred to as being "provided with" another element, it may be provided on the surface or inside of the element.

Example 1

As shown in Figures 1 and 2, a coaxially aimed infrared thermometer of this embodiment includes a thermometer body and an infrared temperature measuring probe 1. An LED light source 2 is arranged around the infrared temperature measuring probe 1, and the light of the LED light source 2 forms a ring light with the infrared temperature measuring probe 1 as the center. Since infrared light is generally invisible to the human eye, the LED light source 2 is required to form a light beam to assist the human eye in aiming, which is helpful for determining whether the infrared light is aimed at the detection area. In this embodiment, the LED light source 2 is arranged in a ring around the infrared probe to ensure that the infrared light is definitely in the center or ring area of the LED light source 2, thereby achieving coaxial aiming.

Optionally, the LED light source 2 is located at the rear end of the infrared temperature measuring probe 1 and arranged in a circular array, the circular array takes the projection of the infrared temperature measuring probe 1 on the plane where the circular array is located as the center of the circle, and the area of the circular array is larger than the projection area of the infrared temperature measuring probe 1. The LED light source 2 can also be located at the front end of the infrared temperature measuring probe 1, or be flush with the infrared temperature measuring probe 1, as long as the infrared area of the infrared probe can be formed on the detection surface of the detection object as the center, and the circular light area surrounds the center.

In order to make the annular light area formed by the LED light source 2 clearer and more directional, in this embodiment, an annular beam limiter 4 concentric with the infrared temperature measuring probe 1 is provided at the light outlet of the infrared temperature measuring probe 1, and the beam limiter 4 includes a first shading portion and an annular channel 3, wherein the first shading portion is concentric with the annular channel 3, and the inner diameter is larger than the outer diameter of the annular channel 3, and the light of the LED light source 2 forms annular light after passing through the annular channel 3. The shading portion of the annular beam limiter 4 blocks the excess light, and the light passing through the annular channel 3 forms an annular area with clearer boundaries, which provides a better reference effect when aiming. Specifically, the annular beam limiter 4 is sleeved on the outside of the lens barrel 5 by means of an interference fit between the inner diameter of the annular channel 3 and the outer side of the lens barrel 5. It can also be snap-fitted, screwed, bonded, or designed as an integral part with the lens barrel.

This embodiment further includes a base 6, which is disposed at the end of the lens barrel 5 where the infrared temperature measuring probe 1 is located, and the LED light source 2 is disposed in a circular array on the base 6. The base 6 and the lens barrel 5 can be integrally formed or assembled together later. During assembly, the base 6 and the lens barrel 5 are connected by one or more of screw connection, clamp connection, bonding, and nail connection.

Example 2

In Example 2, the beam limiter 4 further includes a second shading portion, and the outer diameter of the second shading portion is smaller than the inner diameter of the annular channel 3. At the connection between the beam limiter 4 and the lens barrel 5, a second shading portion is further provided between the annular channel 3 and the lens barrel 5, and the annular beam limiter 4 is sleeved on the outer side of the lens barrel 5 by the inner diameter of the second shading portion being interference fit with the outer side of the lens barrel 5. The design of the second shading portion makes the filtering of the light of the LED light source 2 more comprehensive, and not only the light outside the annular channel 3 can be filtered out by the first shading portion, but also the light inside the annular channel 3 can be filtered out by the second shading portion, so that the annular light in the aiming area is less disturbed and the aiming effect is better.

In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as a limitation on the present invention.

Finally, it should be pointed out that the above embodiments are only used to illustrate the technical solutions of the utility model, rather than to limit them. Although the utility model is described in detail with reference to the above embodiments, a person skilled in the art should understand that the technical solutions described in the above embodiments can still be modified, or some of the technical features can be replaced by equivalents, and these modifications or replacements do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the utility model.

Claims (8)

1. A coaxially aimed infrared thermometer, comprising a thermometer body and an infrared temperature measuring probe, characterized in that an LED light source is arranged around the infrared temperature measuring probe, and the light of the LED light source forms a ring light with the infrared temperature measuring probe as the center. 2. A coaxially aimed infrared thermometer according to claim 1, characterized in that the LED light source is located at the rear end of the infrared temperature measuring probe and arranged in a circular array, the circular array takes the projection of the infrared temperature measuring probe on the plane where the circular array is located as the center of the circle, and the area of the circular array is larger than the projection area of the infrared temperature measuring probe. 3. A coaxially aimed infrared thermometer according to claim 2, characterized in that the light outlet of the infrared temperature measuring probe is provided with an annular beam limiter concentric with the infrared temperature measuring probe, the beam limiter includes a first light shielding portion and an annular channel, the first light shielding portion is concentric with the annular channel, and the inner diameter is larger than the outer diameter of the annular channel, and the light of the LED light source forms an annular light after passing through the annular channel. 4. A coaxially aimed infrared thermometer according to claim 3, characterized in that the inner diameter of the annular channel is interference fit with the outer side of the lens barrel, and the annular beam limiter is sleeved on the outer side of the lens barrel. 5. A coaxially aimed infrared thermometer according to claim 3, characterized in that the beam limiter further comprises a second light shielding portion, and an outer diameter of the second light shielding portion is smaller than an inner diameter of the annular channel. 6. A coaxially aimed infrared thermometer according to claim 5, characterized in that the inner diameter of the second shading portion is interference fit with the outer side of the lens barrel, and the annular beam limiter is sleeved on the outer side of the lens barrel. 7. A coaxially aimed infrared thermometer according to claim 4 or 6, characterized in that it also includes a base, the base is arranged at the end of the lens barrel where the infrared temperature measuring probe is located, and the LED light source is arranged on the base in a circular array. 8. A coaxial aiming infrared thermometer according to claim 7, characterized in that the base and the lens barrel are connected by one or more of screw connection, clamp connection, bonding, and nail connection.