CN212621135U

CN212621135U - Temperature measuring probe and temperature measuring instrument

Info

Publication number: CN212621135U
Application number: CN202021300020.8U
Authority: CN
Inventors: 柳顺兵; 常永良
Original assignee: Zhejiang Uniview Technologies Co Ltd
Current assignee: Zhejiang Uniview Technologies Co Ltd
Priority date: 2020-07-06
Filing date: 2020-07-06
Publication date: 2021-02-26
Anticipated expiration: 2030-07-06

Abstract

The utility model relates to the technical field of infrared temperature measurement, and discloses a temperature measuring probe and a temperature measuring instrument, wherein the temperature measuring probe comprises a sleeve and a sensor, the sleeve is provided with a containing hole and a view field hole which are mutually communicated, and the sensor is arranged in the containing hole; the sleeve is made of metal with low emissivity, the inner wall of the view field hole is in a sawtooth shape, and the surface of the sawtooth is a bright surface. The temperature difference between the sensor and the sleeve is controlled, so that the influence of the sleeve on the radiation energy of the sensor can be effectively reduced, and the influence of the sleeve on the radiation energy of the sensor can be further reduced by matching with a low-emissivity metal material; the inner surface of the view field hole is arranged to be in a sawtooth shape, the surface of each sawtooth is a bright surface, and environmental energy is transmitted to the environment after being reflected once or for multiple times through the surface of each sawtooth and cannot be reflected to the sensor, so that the sensor cannot be interfered by the environmental energy. The influence of the two interference energies on the sensor is small and can be ignored, and the accuracy of the measurement result can be ensured.

Description

Temperature measuring probe and temperature measuring instrument

Technical Field

The utility model relates to an infrared temperature measurement technical field especially relates to a temperature probe and thermoscope.

Background

Objects with temperature above absolute zero will radiate heat outwards, and the radiation intensity is related to the temperature of the object itself. Thermal radiation is bi-directional, but if two objects radiating from each other are at different temperatures, the radiation intensity will be different, so there is a net flow of radiation. The human body infrared thermometer is used for detecting infrared radiation energy of a human body, converting the infrared radiation energy into a voltage signal through a thermopile sensor, and reducing the voltage signal into a human body temperature through signal processing and data processing.

Accurately acquiring human body infrared radiation energy, which is a precondition for effective temperature measurement; namely, the influence of the environmental interference radiation and the interference radiation of other non-target objects on the radiation energy of the target object (human body) acquired by the sensor is reduced or avoided as much as possible. As mentioned above, radiation must exist between any objects, so it is no exception to thermopile sensors, and energy transfer can exist in the following 3 forms;

first, radiation of a target object (human body or the like), which is target energy, does not need to be avoided. Second, radiation between the sleeve of the probe and the sensor, and third, radiation reflected from the environment via the inner surface of the sleeve; the second and third types are both interference energies and the second and third types of energy need to be reduced to reduce interference.

To reduce interference, one of the conventional schemes is: the sleeve is made of copper/aluminum surface spraying high-emissivity and high-absorptivity materials, and the reflectivity of the sleeve is 1-absorptivity (opaque default transmissivity is 0) according to characteristics, and the sleeve is matched with a horn mouth with small-angle camber. And the third energy is a high-emissivity and high-absorptivity material on the inner surface of the sleeve, so that the third energy reaches the sensor by multiple reflections with extremely small energy, and the interference caused by the third energy is extremely small. Traditional infrared temperature measurement module, the temperature measurement is instantaneous work basically, and equipment calorific capacity is few promptly, uses copper aluminium as the sleeve simultaneously, wraps up sensor and window simultaneously, and the transmission of second kind of energy also equals 0 basically promptly, because there is not the difference in temperature just can not have net flow of energy, and the influence of second kind of energy also can be neglected.

However, the existing wrist temperature measuring module needs to be electrified for a long time to work, so that other circuits in the sensor generate heat and a certain temperature rise is caused to the sensor, so that the temperature difference exists between the sensor and the sleeve outside the field angle, and the energy of the part directly influences the test result because the emissivity of the part is high; therefore, the temperature-consistency control sleeve is applied to equipment which works for a long time and has certain temperature rise, and has higher requirements on temperature consistency control of the sensor and the sleeve for controlling the field angle; but in practical application, the method is difficult to realize.

In order to solve the problem, the adopted technical scheme is as follows: the metal bright surface is matched with a small-angle camber (bell mouth), the emissivity of the metal bright surface is low and is only about 0.1, and the flow of the second energy can be effectively reduced; however, because the emissivity of the bright surface of the metal is low, but the reflectivity of the bright surface of the metal is high, the third energy is relatively large in intake, basically only refraction loss exists, and the flare opening is outwards inclined, so that the incidence of the third energy can be reduced to a certain degree; according to the test, the test has a certain effect on the normal temperature environment, and can be basically halved; however, there is still a large influence of the interference radiation of the environment, and especially when the distance is changed, the angle covered by the third energy is increased sharply, so that the interference of the third energy is greatly increased, and the stability of the test result is affected. In addition, in an actual test, the test result is gradually deviated due to the influence of the environment as the distance increases. The actual measurement effect is not obvious, and then through principle analysis, the reflection of environmental energy can not be evaded to this scheme, only can cut down, and the effect is not obvious.

Therefore, a temperature measuring probe and a temperature measuring instrument are needed to solve the above technical problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a temperature probe and thermoscope, it can guarantee that two kinds of interference energy are all less to the influence of sensor, can ignore to guarantee measuring result's accuracy.

To achieve the purpose, the utility model adopts the following technical proposal:

in one aspect, a temperature probe is provided, which includes a sleeve and a sensor; the sleeve is provided with a containing hole and a view field hole which are communicated with each other, and the sensor is arranged in the containing hole; the sleeve is made of metal with low emissivity, the inner wall of the view field hole is in a sawtooth shape, and the surface of the sawtooth is a bright surface.

As a preferred technical scheme of the temperature measuring probe, the sharp angle of the sawtooth is a right angle.

As a preferred technical scheme of the temperature measuring probe, the field angle of the sensor is a, and the acute angle of the sawtooth far away from the sensor is b, wherein b is more than or equal to (90-a/2)/2.

As a preferred technical scheme of the temperature measuring probe, the sleeve is made of copper or aluminum.

As a preferred technical scheme of the temperature measuring probe, the view field hole is a straight hole, the aperture of the view field hole is larger than that of the accommodating hole, the accommodating hole is formed in the bottom of the view field hole, and sawteeth are arranged on the inner side wall and the bottom wall of the view field hole.

As an optimal technical scheme of the temperature measuring probe, the view field hole is a conical hole, the aperture of one end, close to the sensor, of the conical hole is smaller than that of the other end of the conical hole and larger than that of the accommodating hole, the accommodating hole is formed in the bottom of the view field hole, and sawteeth are arranged on the inner side wall and the bottom wall of the view field hole.

As a preferred technical scheme of the temperature measuring probe, the length direction of the sawtooth is arranged along the direction vertical to the axis of the sleeve.

As a preferred technical scheme of the temperature measuring probe, an included angle between the length direction of the sawtooth and the axis of the sleeve is an acute angle.

In another aspect, a thermometer is provided that includes a thermometric probe as described above.

As a preferred technical solution of the temperature measuring instrument, the temperature measuring instrument further includes a circuit board, and the sensor is soldered to the circuit board or a pin of the sensor is soldered to the circuit board.

The utility model has the advantages that:

the metal material can control the temperature difference between the sensor and the sleeve, the influence of the sleeve on the radiation energy of the sensor can be effectively reduced, and the influence of the sleeve on the radiation energy of the sensor can be further reduced by matching the metal material with low emissivity; the inner surface of the view field hole is arranged to be in a sawtooth shape, the surface of each sawtooth is a bright surface, and environmental energy is transmitted to the environment after being reflected once or for multiple times through the surface of each sawtooth and cannot be reflected to the sensor, so that the sensor cannot be interfered by the environmental energy. The influence of the two interference energies on the sensor is small and can be ignored, and the accuracy of the measurement result can be ensured.

Drawings

Fig. 1 is a schematic structural diagram of a temperature measuring probe according to the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic structural diagram of the temperature measuring probe provided by the present invention.

In the figure: 1. a sleeve; 11. a field of view aperture; 12. saw teeth; 2. a sensor.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. The components of embodiments of the present invention, as generally described and illustrated in the figures herein, may be arranged and designed in a wide variety of different configurations.

Thus, the following detailed description of the embodiments of the present invention, presented in the accompanying drawings, is not intended to limit the scope of the invention, as claimed, but is merely representative of selected embodiments of the invention. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative efforts belong to 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 and explained in subsequent figures.

In the description of the present invention, it should be noted that the terms "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. indicate the position or positional relationship based on the position or positional relationship shown in the drawings, or the position or positional relationship which is usually placed when the product of the present invention is used, and are only for convenience of description of the present invention and simplification of description, but do not indicate or imply that the device or element referred to must have a specific position, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," "third," and the like are used solely to distinguish one from another and are not to be construed as indicating or implying relative importance. In the description of the present invention, "a plurality" means two or more unless otherwise specified.

In the description of the present invention, it should also be noted that, unless otherwise explicitly specified or limited, the terms "disposed" and "connected" are to be interpreted broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; either mechanically or electrically. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

In the present disclosure, unless expressly stated or limited otherwise, the first feature "on" or "under" the second feature may comprise direct contact between the first and second features, or may comprise contact between the first and second features not directly. Also, the first feature being "on," "above" and "over" the second feature includes the first feature being directly on and obliquely above the second feature, or merely indicating that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature includes the first feature being directly under and obliquely below the second feature, or simply meaning that the first feature is at a lesser elevation than the second feature.

Reference will now be made in detail to embodiments of the present invention, examples of which are illustrated in the accompanying drawings, wherein like reference numerals refer to the same or similar elements or elements having the same or similar function throughout. The embodiments described below with reference to the drawings are exemplary only for the purpose of explaining the present invention, and should not be construed as limiting the present invention.

As shown in fig. 1 and 2, the present embodiment discloses a temperature measuring probe, which includes a sleeve 1 and a sensor 2. The sleeve 1 is provided with a storage hole and a view field hole 11 which are communicated with each other, and the sensor 2 is arranged in the storage hole; the sleeve 1 is made of metal with low emissivity, the inner wall of the view field hole 11 is arranged to be serrated, and the surface of the sawtooth 12 is a bright surface.

The metal material can control the temperature difference between the sensor 2 and the sleeve 1, the influence of the sleeve 1 on the radiation energy of the sensor 2 can be effectively reduced, and the influence of the sleeve 1 on the radiation energy of the sensor 2 can be further reduced by matching with the low-emissivity metal material; the inner surface of the field hole 11 is arranged to be saw-toothed, the surface of the saw tooth 12 is a bright surface, and the environmental energy is transmitted to the environment after being reflected once or for multiple times by the surface of the saw tooth 12 and is not reflected to the sensor 2, so that the environmental energy does not cause interference to the sensor 2. The influence of the two interference energies on the sensor 2 is small and can be ignored, and the accuracy of the measurement result can be ensured.

Specifically, the tip angle c of the serration 12 is a right angle, that is, the sectional shape of the serration 12 is a right triangle. The field angle of the sensor 2 is a and the acute angle of the sawtooth 12 away from the sensor 2 is b (as shown in fig. 2), where b ≧ 90-a/2)/2.

In fig. 3, the light with an arrow is the most obliquely incident interference energy, and it is only necessary to ensure that the energy is not received by the sensor, so that all the interference energy is not received by the sensor; therefore, the incident interference energy of the light with the arrow is basically coincident with the field angle of the sensor; the angle 1 is a half angle of the field angle a, and the size is a/2; the angle 2 and the angle 1 are complementary, so the size of the angle 2 is 90-a/2; since the angles 3 and 4 are the incident angle and the reflection angle of the light, they are equal, so the angle 3 is half of the angle 2, specifically: (90-a/2)/2; angle 3+ angle 6 is 90 degrees and angle 6+ angle 5 is 90 degrees, so angle 3 is equal to angle 5, and since angle 5 is equal to angle 7, angle 7 is available in the size of (90-a/2)/2; therefore, as long as the size of the angle 7 is greater than or equal to (90-a/2)/2, all environmental interference energy can be ensured not to be received by the sensor; i.e. the acute angle of the serrations 12 away from the sensor 2 is b, wherein b ≧ 90-a/2)/2.

The sleeve 1 is made of copper or aluminum with high reflectivity and low emissivity, and the surface of the sawtooth 12 is subjected to bright surface treatment.

Preferably, in this embodiment, the field of view hole 11 is a straight hole, the aperture of the field of view hole 11 is larger than the aperture of the storage hole, the storage hole is disposed at the bottom of the field of view hole 11, and the inner side wall and the bottom wall of the field of view hole 11 are both provided with the saw teeth 12.

In other embodiments, the view hole 11 is a tapered hole, the diameter of the tapered hole near one end of the sensor 2 is smaller than that of the other end of the sensor and larger than that of the accommodating hole, the accommodating hole is disposed at the bottom of the view hole 11, and the inner side wall and the bottom wall of the view hole 11 are both provided with the saw teeth 12.

Preferably, in the present embodiment, the length direction of the serrations 12 is arranged in a direction perpendicular to the axial direction of the sleeve 1. In other embodiments, the length of the serrations 12 may be at an acute angle to the axis of the sleeve 1, or the serrations 12 may be helically disposed similar to an internal thread.

The embodiment also discloses a temperature measuring instrument, which comprises the temperature measuring probe and a circuit board, wherein the sensor 2 is welded on the circuit board or the pin of the sensor 2 is welded on the circuit board, so as to realize the electrical connection between the sensor 2 and the circuit board.

It is obvious that the above embodiments of the present invention are only examples for clearly illustrating the present invention, and are not intended to limit the embodiments of the present invention. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. Any modification, equivalent replacement, and improvement made within the spirit and principle of the present invention should be included in the protection scope of the claims of the present invention.

Claims

1. The temperature measuring probe is characterized by comprising a sleeve (1) and a sensor (2), wherein the sleeve (1) is provided with a receiving hole and a view field hole (11) which are communicated with each other, and the sensor (2) is arranged in the receiving hole; the sleeve (1) is made of metal with low emissivity, the inner wall of the view field hole (11) is arranged to be serrated, and the surface of the sawtooth (12) is a bright surface.

2. Thermometric probe according to claim 1, wherein the tip angle of said serrations (12) is a right angle.

3. Thermometric probe according to claim 2, wherein the angle of view of the sensor (2) is a and the acute angle of the serrations (12) away from the sensor (2) is b, wherein b ≧ (90-a/2)/2.

4. The temperature probe according to claim 1, wherein the sleeve (1) is made of copper or aluminum.

5. The temperature measuring probe according to claim 1, wherein the field hole (11) is a straight hole, the aperture of the field hole (11) is larger than that of the accommodating hole, the accommodating hole is arranged at the bottom of the field hole (11), and the inner side wall and the bottom wall of the field hole (11) are both provided with sawteeth (12).

6. The temperature probe according to claim 1, wherein the field of view hole (11) is a tapered hole, the diameter of the tapered hole near one end of the sensor (2) is smaller than that of the other end of the sensor and larger than that of the accommodating hole, the accommodating hole is arranged at the bottom of the field of view hole (11), and sawteeth (12) are arranged on the inner side wall and the bottom wall of the field of view hole (11).

7. The thermometric probe according to claim 1, wherein the length direction of said serrations (12) is arranged in a direction perpendicular to the axis of said sleeve (1).

8. The temperature probe according to claim 1, wherein the included angle between the length direction of the saw teeth (12) and the axis of the sleeve (1) is an acute angle.

9. A thermometer comprising a thermometric probe according to any of claims 1-8.

10. The temperature gauge according to claim 9, further comprising a circuit board to which the sensor (2) is soldered or to which pins of the sensor (2) are soldered.