CN113483897A

CN113483897A - Focusing thermometer and temperature measuring method

Info

Publication number: CN113483897A
Application number: CN202110797299.8A
Authority: CN
Inventors: 陈先伟; 廖彦
Original assignee: Zhejiang Joytech Medical Instrument Technology Co ltd
Current assignee: Zhejiang Joytech Medical Instrument Technology Co ltd
Priority date: 2021-07-14
Filing date: 2021-07-14
Publication date: 2021-10-08

Abstract

The invention discloses a focusing temperature detector and a temperature measuring method, wherein the temperature detector comprises: a light source; a grating; a lens; a temperature sensor; the light source, the grating and the lens are sequentially and linearly arranged, the light source emits a light beam on the grating, light splitting is carried out through the light hole in the grating, the light splitting light beam irradiates the lens to be focused, and the temperature acquired by the temperature sensor is read according to the focused light spot. The thermometer adopts a grating light splitting mode, and the distance between the thermometer and a temperature measurement target is judged in a mode that the split light beam forms an obvious light spot after being focused by a lens. The method has the advantages that complex distance calculation and image calculation are not needed, accurate judgment of the temperature measurement distance can be achieved only through a physical mode, and cost can be greatly reduced while temperature measurement precision is guaranteed.

Description

Focusing thermometer and temperature measuring method

Technical Field

The invention relates to the technical field of thermometers, in particular to a focusing thermometer and a temperature measuring method.

Background

Temperature measuring devices such as an eye forehead thermometer and the like usually need to keep a certain distance range with a human body to measure, and when the distance is too large or too small, the measurement precision of the body temperature is affected. In the prior art, the following technical scheme is included to realize distance control: one is to use a distance sensor to detect the distance between the thermometer and the detection target, and to calculate the measured temperature by using a distance temperature compensation method. Still others measure the target temperature using 3D touch and projection imaging. The technical scheme used in the prior art needs very high cost, and also relates to the processing of distance and image data to accurately measure the target temperature, and the technical means is complex.

Disclosure of Invention

One of the purposes of the invention is to provide a focusing thermometer and a temperature measuring method, wherein the thermometer adopts grating light splitting, and the distance between the thermometer and a temperature measuring target is determined in a mode that the split light beam forms an obvious light spot after being focused by a lens. The method has the advantages that complex distance calculation and image calculation are not needed, accurate judgment of the temperature measurement distance can be achieved only through a physical mode, and cost can be greatly reduced while temperature measurement precision is guaranteed.

Another object of the present invention is to provide a focusing thermometer and a temperature measuring method, in which the thermometer can split a light beam by combining a single light source with a grating, and has a very simple structure, so that the thermometer can be more conveniently installed, and does not need to use a complicated circuit, thereby reducing the manufacturing cost and improving the manufacturing efficiency.

Another objective of the present invention is to provide a focusing thermometer and a temperature measuring method, wherein the thermometer can focus split light beams within a fixed range by presetting the distance between a lens, a grating and a light source or selecting lenses with different focal lengths and setting the size of an aperture, and the focusing within the fixed distance range can be determined by moving the thermometer, so that actual measurement is not required.

To achieve at least one of the above objects, the present invention further provides a focusing thermometer comprising:

a light source;

a grating;

a lens;

a temperature sensor;

the light source, the grating and the lens are sequentially and linearly arranged, the light source emits a light beam on the grating, light splitting is carried out through the light hole in the grating, the light splitting light beam irradiates the lens and then is focused on the other side of the lens, and the temperature acquired by the temperature sensor is read according to the focused light spot.

According to a preferred embodiment of the present invention, the light source is a single LED light source, and the LED light source is disposed inside the thermometer.

According to another preferred embodiment of the invention, the grating comprises at least two light apertures for forming at least two split light beams.

According to another preferred embodiment of the present invention, the thermometer includes an optical mount that holds the light source, grating and lens.

According to another preferred embodiment of the present invention, the inner end of the optical bracket is fixedly mounted with the light source, the lens is fixedly mounted at the outer end of the optical bracket, and the grating is fixedly mounted at the middle of the optical bracket.

According to another preferred embodiment of the present invention, the optical support has a light channel, the light channel is a straight cylindrical structure, and the light channel is used for providing the guidance of the light beam split by the grating.

According to another preferred embodiment of the invention, the lens is provided as a convex lens made of glass or ABS or PMMA.

According to another preferred embodiment of the present invention, the grating is integrally formed on the optical mount.

According to another preferred embodiment of the invention, said temperature sensor is mounted on said optical support, said temperature sensor having a detection opening parallel to the opening of the light passage on said optical support.

In order to achieve at least one of the above objects, the present invention further provides a grating focusing temperature measuring method, including:

starting a temperature detector, and turning on a light source and a temperature sensor;

moving the thermometer to enable the detection light of the light source to irradiate the temperature measurement target;

adjusting the distance between the thermometer and the target to focus the probe light on the temperature measurement target to form a clear light spot;

and reading the temperature detected by the temperature sensor after a clear light spot is formed on the temperature measurement target.

According to one preferred embodiment of the invention, the position among the grating, the lens and the light source is adjusted, and/or the size of the light hole is adjusted, so that the position and the size of the light spot are adjusted.

Drawings

FIG. 1 shows a perspective schematic view of a focused thermometer of the present invention.

FIG. 2 shows a schematic cross-sectional view of a focused thermometer of the present invention.

FIG. 3 shows another cross-sectional schematic view of a focused thermometer of the present invention.

FIG. 4 is a schematic flow chart of a grating focusing temperature measurement method according to the present invention.

Wherein,

the device comprises a light source-10, a grating-20, a light hole-21, a split light beam-22, a light spot-23, a lens-30, an optical bracket-40, a light channel-41, a temperature sensor-50 and a switch-60.

Detailed Description

The following description is presented to disclose the invention so as to enable any person skilled in the art to practice the invention. The preferred embodiments in the following description are given by way of example only, and other obvious variations will occur to those skilled in the art. The basic principles of the invention, as defined in the following description, may be applied to other embodiments, variations, modifications, equivalents, and other technical solutions without departing from the spirit and scope of the invention.

It will be understood by those skilled in the art that in the present disclosure, the terms "longitudinal," "lateral," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," and the like are used in an orientation or positional relationship indicated in the drawings for ease of description and simplicity of description, and do not indicate or imply that the referenced devices or components must be in a particular orientation, constructed and operated in a particular orientation, and thus the above terms are not to be construed as limiting the present invention.

It is understood that the terms "a" and "an" should be interpreted as meaning that a number of one element or element is one in one embodiment, while a number of other elements is one in another embodiment, and the terms "a" and "an" should not be interpreted as limiting the number.

Referring to fig. 1 to 4, the present invention provides a focusing thermometer and a temperature measuring method, wherein the thermometer includes a grating, a light source, a lens, a temperature sensor, a power supply, a processing chip, etc., the power supply is connected to the light source and the temperature sensor for supplying power to the light source and the temperature sensor, the temperature sensor and the light source are connected to a processor, a switch is disposed on an outer surface of the thermometer, and the switch is connected to the processor for controlling operating states of the light source and the temperature sensor.

The light source, the grating and the lens are sequentially arranged in a linear mode, the light source is arranged on the inner side of the temperature detector, the grating is arranged in the middle of the temperature detector, and the lens is arranged at a position close to the port of the temperature detector. Wherein the center of light source and the center of lens are located same straight line, the grating includes a plurality of unthreaded holes, the grating has a center, the unthreaded hole can be in the central symmetrical arrangement of light cut array, and grating center, light source center and lens center all are in same straight line.

It is worth mentioning that the thermometer includes optical support, optical support is used for optical devices such as the fixed above-mentioned lens of installation and light source, optical support inside has the light source installation department, optical support's middle part has the light passageway optical support's the outside is equipped with the through-hole, the light source can be set up to single LED light source, the LED light source is when sending LED light beam, through a plurality of unthreaded holes in the grating realize the beam splitting of LED light beam, and wherein the LED light beam of beam splitting further shines the medial surface of lens, through the refraction effect of lens can with the beam splitting focuses on in the lateral surface space of lens. It should be noted that the lens of the present invention may adopt a convex lens, and the distance of focusing the split beam in the space outside the convex lens can be realized by adjusting the distance between the grating and the convex lens. In the actual use process, because the light splitting beams are small, and the distances of different light splitting holes on the grating are far away, when a temperature detection target is far away from a focusing point of the light splitting beams, the light splitting beams are rapidly separated due to cross emission, light spots can be rapidly diffused and diluted until disappear, and the display condition of the light spots excessively close to the temperature measurement timing is the same, so that the focusing distance range is small and basically can be considered as fixed and unchangeable. It should be noted that the principle of the grating light splitting is to screen out a properly emitted light beam and control the size of the light beam, so that the focused light spot is not affected by the stray light beam and the too thick light beam, and the focus point of the light spot in the space is relatively clear and unique. Therefore, the invention can directly fix the detection distance range of the temperature detector and match the distance of the light splitting beam focused in the space of the outer side surface of the convex lens, thereby avoiding the distance compensation in temperature measurement and calculation.

In another preferred embodiment of the present invention, the lens can be disposed or replaced by a prism, a mirror, etc., and the split beams can be focused at a relatively fixed position by using the refraction of the prism or the reflection of the mirror. And in another feasible preferred embodiment of the invention, the light source can be arranged as at least two light sources which can emit linear light beams, such as laser emitters. In this embodiment, the grating may be eliminated such that focusing is achieved by directing at least two linear beams onto the lens.

The optical support is provided with a lens mounting groove, the convex lens can be mounted in the lens mounting groove in a mode of being perpendicular to the same straight line where the center of the grating, the center of the light source and the center of the lens are located, the grating can be mounted at a position close to the light source by adopting a separated structure, and the grating is integrally perpendicular to the straight line. Of course, in another preferred embodiment of the present invention, the grating may be integrally formed with the optical support, at least 2 light holes are symmetrically disposed on the grating according to a central point, the optical support further has a light channel disposed between the lens and the grating, and the light channel is used for guiding the split light beam, and the size and the position of the light hole on the grating are set so that the split light beam may not directly irradiate on a wall plate of the light channel, so that the reflection of light may not cause the influence of stray light on the focusing definition of the light spot.

The temperature sensor is arranged above the optical bracket, and can be arranged to be in an integral structure with the optical bracket or detachably connected with the optical bracket. The temperature sensor is provided with a detection port used for receiving temperature related data of a temperature measurement target. Because the detection port is fixed relative to the lens, the temperature measurement distance can be quickly and manually identified only by fixedly setting the reasonable detection distance of the temperature sensor and matching the focused light spots. Complex processing logic and devices are not needed, and manufacturing cost can be greatly reduced. Wherein the lens may be made of ABS resin material, PMMP (polymethyl methacrylate) or PC (polycarbonate).

It will be understood by those skilled in the art that the embodiments of the present invention described above and illustrated in the drawings are given by way of example only and not by way of limitation, the objects of the invention having been fully and effectively achieved, the functional and structural principles of the present invention having been shown and described in the embodiments, and that various changes or modifications may be made in the embodiments of the present invention without departing from such principles.

Claims

1. A focused thermometer, said thermometer comprising:

a light source;

a grating;

a lens;

a temperature sensor;

the light source, the grating and the lens are sequentially and linearly arranged, the light source emits a light beam on the grating, light splitting is carried out through the light hole in the grating, the light splitting light beam irradiates the lens to be focused, and the temperature acquired by the temperature sensor is read according to the focused light spot.

2. The focused thermometer of claim 1 wherein said light source is a single LED light source and said LED light source is disposed within the thermometer.

3. The focused thermometer of claim 1 wherein said grating includes at least two optical apertures for forming at least two split optical beams.

4. The focused thermometer of claim 1 wherein said thermometer includes an optical mount, said optical mount holding said light source, grating and lens.

5. The focused thermometer of claim 4 wherein said light source is mounted and fixed on the inner end of said optical bracket, said lens is mounted and fixed on the outer end of said optical bracket, and said grating is mounted and fixed on the middle of said optical bracket.

6. The focused thermometer of claim 4 wherein said optical support has an optical channel, said optical channel having a straight cylindrical configuration, said optical channel for providing beam guidance after said grating has split said light beam.

7. The focused thermometer of claim 1 wherein said lens is configured as a convex lens comprised of glass or ABS or PMMA.

8. The focused thermometer of claim 4 wherein said grating is integrally formed on said optical support.

9. The focused thermometer of claim 6 wherein said temperature sensor is mounted on said optical support, said temperature sensor having a sensing port parallel or oblique to the opening of the optical channel on said optical support.

10. A focused thermometer, said thermometer comprising:

at least two light sources;

a lens;

a temperature sensor;

the two light sources respectively emit linear light beams, the linear light beams irradiate one side of the lens, focused light spots are generated on the other side of the lens, and the induction temperature of the temperature sensor is read according to the focused light spots.

11. A method of focused thermometry, the method comprising:

12. The method of claim 11, wherein the position among the grating, the lens and the light source and/or the size of the aperture are adjusted to adjust the position and size of the light spot.