CN213748791U

CN213748791U - Accurate laser indicating device of infrared thermometer and infrared thermometer

Info

Publication number: CN213748791U
Application number: CN202023110524.6U
Authority: CN
Inventors: 张跃; 张大成; 王婷
Original assignee: Xuzhou Huaiyuan Electronic Technology Co ltd
Current assignee: Xuzhou Huaiyuan Electronic Technology Co ltd
Priority date: 2020-12-22
Filing date: 2020-12-22
Publication date: 2021-07-20
Anticipated expiration: 2030-12-22

Abstract

The utility model provides an accurate laser indicating device of infrared radiation thermometer and infrared radiation thermometer, including two style of calligraphy visible light laser instrument, two style of calligraphy visible light laser instrument settings are around infrared sensor of infrared radiation thermometer, and the nodical point that falls on the infrared sensor central point of the extension line of two style of calligraphy visible light laser instruments. The utility model discloses only utilize two straight line type visible light lasers, through the mode of geometric projection, obtained accurate temperature measurement point at the nodical of two straight lines. In actual production and manufacturing, only the angular points of the extension lines of the two linear visible light lasers are required to be ensured to fall through the central point of the infrared sensor, the processing and assembling difficulty is greatly reduced, a high-precision coupling table is not required, and the production cost is reduced. The included angle of the extension lines of the two linear visible light lasers can be any angle larger than 0, and the linear visible light lasers can adapt to scenes with different sensor field angles.

Description

Accurate laser indicating device of infrared thermometer and infrared thermometer

Technical Field

The utility model relates to an infrared radiation thermometer, concretely relates to accurate laser indicating device of infrared radiation thermometer and infrared radiation thermometer.

Background

The infrared thermometer is an instrument using infrared heat radiation as a measuring principle, an infrared temperature sensor working inside senses the infrared radiation of a measured object, and the temperature of the measured object can be obtained by calculating the size of the infrared radiation through a formula. Because the infrared temperature sensor belongs to an optical device and has an inherent field angle, only an object in the field angle range can measure the accurate temperature, and the object beyond the range cannot be correctly reflected on the measurement result. The infrared radiation is invisible light, so that in the prior art, a "dot" type or "cross" red laser is usually adopted as a sighting device to determine which object the current thermometer is aimed at, the "dot" type or "cross" red laser is usually placed at the periphery of the infrared sensor, and is analyzed from a spatial light path projection, a target indicated by the red laser is not at the same point as a central point (temperature measuring point) of the sensor, but has a slight error, and the error increases with the increase of the distance between the measured object and the infrared sensor, so that the error of the measurement result increases.

Disclosure of Invention

The purpose of the invention is as follows: for overcoming prior art's defect, the utility model provides an accurate laser indicating device of infrared radiation thermometer and infrared radiation thermometer can realize the accurate instruction of infrared sensor temperature measurement point in the infrared radiation thermometer with extremely low cost.

The technical scheme is as follows: in order to achieve the above object, the utility model provides a following technical scheme:

on the one hand, the utility model provides an accurate laser indicating device of infrared radiation thermometer, including two style of calligraphy visible light lasers, two style of calligraphy visible light lasers set up around infrared radiation thermometer's infrared sensor, and the nodical point that falls on infrared radiation sensor's central point of the extension line of two style of calligraphy visible light lasers.

As an optional embodiment of the accurate laser indicating device of the infrared thermometer, the two in-line visible light lasers and the infrared sensor are installed on the same plane.

On the other hand, the utility model also provides an infrared thermometer, reach including infrared sensor the accurate laser indicating device of infrared thermometer.

Has the advantages that: most of the existing infrared thermometers in the market adopt a single point type or cross type laser indication mode, and a single laser needs to ensure the coaxiality of the laser and a sensor. Because the laser and the infrared sensor need to be fixed on the machine during processing and assembling and are in interference fit, the coaxiality is difficult to guarantee. Even if the ideal coaxiality is achieved, on one hand, high coaxiality requires a high-precision coupling table, so that the manufacturing cost is increased, on the other hand, the indication point of laser projection cannot be overlapped with the center of the sensor, and the projection indication point has a fixed distance error with a real temperature measurement point. Compared with the prior art, the utility model discloses only utilize two style of calligraphy visible light lasers, through the mode of geometric projection, obtain accurate temperature measurement point at the nodical of two laser projection lines. In actual production and manufacturing, only the intersection point of the extension lines of the two linear visible light lasers is ensured to fall on the central point of the infrared sensor, the processing and assembling difficulty is greatly reduced, a high-precision coupling table is not needed, and the production cost is reduced. The included angle of the extension lines of the two linear visible light lasers can be any angle larger than 0, and the linear visible light lasers can adapt to scenes with different sensor field angles.

Drawings

FIG. 1 is a schematic structural view of an infrared thermometer according to an embodiment;

in the figure: 1. the device comprises a first linear visible light laser, a second linear visible light laser, 3, an infrared sensor, 4, a measured object, 5 and an infrared thermometer body.

Detailed Description

The present invention will be further described with reference to the accompanying drawings and specific embodiments. It is to be understood, however, that the invention may be embodied in various forms, and that there is shown in the drawings and will hereinafter be described some exemplary and non-limiting embodiments, with the understanding that the present invention is not intended to be limited to the specific embodiments illustrated.

It is to be understood that the features listed above for the different embodiments may be combined with each other, where technically feasible, to form further embodiments within the scope of the invention. Furthermore, the specific examples and embodiments described herein are non-limiting, and various modifications may be made in the structure, steps, and sequence set forth above without departing from the scope of the present invention.

Example (b):

fig. 1 exemplarily shows a structural schematic diagram of an infrared thermometer, and as shown in the figure, the entire infrared thermometer includes an infrared thermometer body 5, and a first in-line visible light laser 1, a second in-line visible light laser 2, and an infrared sensor 3 mounted at an end of the infrared thermometer body 5; the first linear visible light laser 1 and the second linear visible light laser 2 form an accurate laser indicating device of the infrared thermometer.

The first linear visible light laser 1, the second linear visible light laser 2 and the infrared sensor 3 are arranged on the same mounting plane, the extension line of the first linear visible light laser 1 is orthogonal to the extension line of the second linear visible light laser 2, and the intersection point falls on the center of the infrared sensor 3.

When the first linear visible light laser 1 and the second linear visible light laser 2 are turned on, linear laser light emitted by the first linear visible light laser 1 irradiates the surface of the object 4 to be measured to form a visible light straight line L1, the second linear visible light laser 2 irradiates the surface of the object 4 to be measured to form a visible light straight line L2, and the visible light straight line L1 and the visible light straight line L2 intersect at a point 1. According to the projection geometric principle, the center point of the infrared temperature sensor 3 is superposed with the intersection point 1 of the visible light straight lines L1 and L2, and the point 1 can accurately reflect the positive center of the infrared sensor and can reflect the temperature measurement result more truly compared with other points around.

Optionally, the intersection point of the extension lines of the first linear visible light laser 1 and the second linear visible light laser 2 only needs to fall on the central point of the infrared sensor, and the included angle between the extension lines of the two linear visible light lasers can be any angle larger than 0, so that the sensor can adapt to different scenes of the sensor field angles.

The above description is only a preferred embodiment of the present invention, and it should be noted that: for those skilled in the art, without departing from the principle of the present invention, several improvements and modifications can be made, and these improvements and modifications should also be considered as the protection scope of the present invention.

Claims

1. The accurate laser indicating device of the infrared thermometer is characterized by comprising two linear visible light lasers, wherein the two linear visible light lasers are arranged around an infrared sensor of the infrared thermometer, and the intersection point of the extension lines of the two linear visible light lasers falls on the central point of the infrared sensor.

2. The accurate laser indicating device of infrared thermometer according to claim 1, wherein said two in-line visible light lasers and said infrared sensor are installed on the same plane.

3. An infrared thermometer comprising an infrared sensor and an infrared thermometer precision laser pointer device as claimed in any one of claims 1 to 2.