Blackbody calibration device and method

Abstract

The present invention discloses a blackbody calibration device and method. The device comprises: a temperature measuring box with a temperature control device and a motion mechanism inside, a blackbody placed in the temperature measuring box, and a temperature measuring instrument, wherein the temperature measuring instrument comprises a temperature measuring probe located in the temperature measuring box, and a test channel connected to the outside is opened on the temperature measuring box; the temperature control device is used to control the inside of the temperature measuring box at a set temperature, and the motion mechanism is used to drive the temperature measuring probe to rotate; when calibrating, the temperature measuring probe points to the blackbody; when testing, the temperature measuring probe points to the external object to be tested through the test channel. The present invention prevents the temperature measurement calibration from being affected by outdoor weather conditions, greatly improving the accuracy of temperature measurement calibration; at the same time, the rotation of the temperature measuring probe can avoid inaccurate or failed temperature measurement calibration caused by the blackbody being blocked by the object to be tested, and also reduces the requirements for the position and posture of the object to be tested.

Description

Technical Field

[0001] The present invention relates to the technical field of temperature calibration, and in particular to a blackbody calibration device and method. Background Art

[0002] The application of temperature measuring instruments is becoming more and more common, especially during the epidemic. A large part of the existing temperature measuring instruments use black bodies for temperature calibration. In the existing temperature calibration scheme, the black body is a certain distance away from the temperature measuring probe, which has the following problems:

[0003] 1. The blackbody is set outdoors and is greatly affected by outdoor climate conditions, resulting in poor actual temperature measurement accuracy;

[0004] 2. The temperature measuring probe needs to detect the temperature of the black body and the object to be measured at the same time. The temperature measurement result may be inaccurate because the object to be measured blocks the black body and the calibration function of the black body is not played. Summary of the invention

[0005] The object of the present invention is to provide a blackbody calibration device for improving calibration accuracy. The object of the present invention is also to provide an application method of the blackbody calibration device.

[0006] According to a first aspect of the present invention, a blackbody calibration device is provided, which includes: a temperature measuring box with a temperature control device and a motion mechanism inside, a blackbody placed in the temperature measuring box, and a temperature measuring instrument, wherein the temperature measuring instrument includes a temperature measuring probe located in the temperature measuring box, and a test channel connected to the outside is opened on the temperature measuring box; the temperature control device is used to control the inside of the temperature measuring box at a set temperature, and the motion mechanism is used to drive the temperature measuring probe to rotate; when calibrating, the temperature measuring probe is driven by the motion mechanism to point to the blackbody; when detecting, the temperature measuring probe is driven by the motion mechanism to point to an object to be detected located outside the temperature measuring box through the test channel.

[0007] Furthermore, the temperature measuring box is divided into a first compartment and a second compartment, the black body and the temperature control device are located in the first compartment, the temperature measuring probe and the motion mechanism are located in the second compartment, a connecting channel is provided between the first compartment and the second compartment, and the test channel is opened in the second compartment; the temperature of the first compartment is kept constant at the set temperature of the black body under the action of the temperature control device; during calibration, the temperature measuring probe is driven by the motion mechanism to point to the black body through the connecting channel.

[0008] According to a second aspect of the present invention, there is provided an application method of the blackbody calibration device as described above, comprising the following steps: S1. a temperature measuring probe detects the temperature of the blackbody; S2. a temperature measuring instrument performs temperature calibration according to the monitored temperature of the blackbody; S3. when an object to be detected enters a target space, the motion mechanism drives the temperature measuring probe to point to the object to be detected; S4. the temperature measuring probe detects the temperature of the object to be detected; S5. after the object to be detected leaves the target space, the motion mechanism drives the temperature measuring probe to point to the blackbody.

[0009] It can be seen from the above technical solutions that the embodiments of the present invention have the following advantages:

[0010] The present invention arranges the black body and the temperature measuring probe in a temperature measuring box, and the temperature measuring box is provided with a temperature control device, so that the temperature measurement calibration is not affected by outdoor climate conditions, and higher temperature measurement accuracy can be achieved, which greatly improves the accuracy of temperature measurement calibration; at the same time, a motion mechanism is arranged in the temperature measuring box, which can drive the temperature measuring probe to rotate, so that the temperature measuring probe points to the black body during calibration and points to the object to be detected during detection, so as to avoid inaccurate or failed temperature measurement calibration caused by the black body being blocked by the object to be detected, and also reduce the requirements for the position and posture of the object to be detected. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the drawings required for use in the embodiments and the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0012] Figure 1 It is a schematic structural diagram of a blackbody calibration device provided by an embodiment of the present invention. DETAILED DESCRIPTION

[0013] In order to enable those skilled in the art to better understand the scheme of the present invention, the technical scheme in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work should fall within the scope of protection of the present invention.

[0014] The terms "first", "second", "third", etc. in the specification and claims of the present invention and the above-mentioned drawings are used to distinguish different objects, rather than to describe a specific order. In addition, the terms "including" and "having" and any variations thereof are intended to cover non-exclusive inclusions. For example, a process, method, system, product or device that includes a series of steps or units is not limited to the listed steps or units, but optionally includes steps or units that are not listed, or optionally includes other steps or units inherent to these processes, methods, products or devices.

[0015] The following describes the embodiments in detail.

[0016] Please refer to Figure 1 , one embodiment of the present invention provides a blackbody calibration device.

[0017] The device may include: a temperature measuring box 10, a black body 20 and a temperature measuring instrument.

[0018] The temperature measuring instrument may be a conventional temperature measuring instrument, which includes a temperature measuring probe 31, and may also include a signal processing module, a storage module, a communication module, a display screen, etc. The storage module, the communication module, the display screen, and the temperature measuring probe 31 are respectively connected to the signal processing module. The specific model of the temperature measuring instrument and the specific model of the temperature measuring probe 31 are not limited herein. For example, the temperature measuring probe 31 may be an infrared temperature probe or other types of temperature probes.

[0019] The black body 20 may be a conventional black body radiation source, and the specific type and model of the black body radiation source is not limited herein.

[0020] The temperature measuring probe 31 and the black body 20 are both placed inside the temperature measuring box 10. The temperature measuring box 10 is provided with a test channel 17 connected to the outside, so that the temperature measuring probe 31 can point to the object to be detected 40 located outside the temperature measuring box through the test channel 17.

[0021] The key point of the embodiment of the present invention lies in the structure of the temperature measuring box 10 and its spatial position relationship and connection relationship with the black body 20 and the temperature measuring probe 31.

[0022] In this embodiment, a temperature control device and a motion mechanism 13 are provided inside the temperature measuring box 10. The temperature control device is used to control the temperature inside the temperature measuring box at a set temperature, and the motion mechanism 13 is used to drive the temperature measuring probe 31 to rotate. When calibrating, the temperature measuring probe 31 is driven by the motion mechanism 13 to point to the black body 20; when testing, the temperature measuring probe 31 is driven by the motion mechanism 13 to point to the object to be tested 40 located outside the temperature measuring box 10 through the test channel 17.

[0023] Furthermore, the temperature measuring box 10 is divided into a first compartment 11 and a second compartment 12, a connecting channel 16 is provided between the first compartment 11 and the second compartment 12, and the second compartment is provided with a test channel 17. The connecting channel 16 may be a first through hole provided on a partition separating the first compartment 11 and the second compartment 12; and the test channel 17 may be a second through hole provided on a partition wall between the second compartment 12 and the object 40 to be detected.

[0024] The black body 20 and the temperature control device are arranged in the first compartment 11, and the temperature of the first compartment 11 is constant at the set temperature of the black body 20 under the action of the temperature control device. The set temperature of the black body is set according to specific needs and is not limited herein. The temperature control device can be, for example, an air conditioner or other device capable of adjusting temperature, used to adjust the temperature in the first compartment 11.

[0025] The temperature probe 31 is connected to the motion mechanism 13, and both are disposed in the second compartment 12. The specific structure of the motion mechanism 13 is not limited herein, as long as it can be used to drive the temperature probe 31 to rotate. For example, the motion mechanism 13 can specifically adopt a swing mechanism, such as a cam swing mechanism or other types of swing mechanisms, and can specifically include a rotating plate for carrying the temperature probe 31, a motor for driving the rotating plate to rotate, and the like.

[0026] During calibration, the temperature measuring probe 31 is driven by the motion mechanism 13 to rotate to a first position, at which position it points to the black body 20 through the connecting channel; during detection, the temperature measuring probe 31 is driven by the motion mechanism 13 to rotate to a second position, at which position it points to the object to be detected 40 located outside the temperature measuring box through the test channel.

[0027] Furthermore, in some embodiments, the blackbody calibration device of this embodiment further includes: a control unit 14 connected to the motion mechanism 13, and a detection unit 15 connected to the control unit 14. The control unit 14 and the detection unit 15 can be arranged outside the temperature measuring box 10. The control unit 14 is a unit for controlling the motion mechanism, for example, a single chip microcomputer can be used. The detection unit 15 can, for example, be an infrared detection sensor, etc.

[0028] In application, the detection unit 15 is used to detect whether there is an object 40 to be detected in the target space. If so, a detection signal is sent to the control unit 14; the control unit 14 is used to control the movement of the motion mechanism 13 after receiving the detection signal, so as to drive the temperature measuring probe 31 to point to the object to be detected.

[0029] Optionally, in some embodiments, the black body 20, the first through hole 16 and the temperature measuring probe 31 are located on a first straight line; the temperature measuring probe 31, the second through hole 17 and the object to be detected 40 are located on a second straight line. The first straight line and the second straight line form a certain angle with each other, for example, they can be perpendicular to each other. In other words, with the temperature measuring probe 31 as the center point, the black body 20 and the object to be detected 40 are located at different angles to ensure that they do not block each other.

[0030] Next, the application method of the blackbody calibration device described in this embodiment is further described. The method may include the following steps:

[0031] S1. In the initial state, the temperature measuring probe points to the black body and can detect the temperature of the black body according to instructions or a preset cycle;

[0032] S2. The temperature measuring instrument is calibrated according to the temperature of the monitored black body;

[0033] S3. When an object to be detected, such as a visitor, enters the target space (eg, a room entrance), the motion mechanism drives the temperature probe to point to the object to be detected;

[0034] S4. The temperature probe detects the temperature of the object to be detected;

[0035] S5. After the object to be detected leaves the target space, the motion mechanism drives the temperature measuring probe to point to the black body.

[0036] Return to step S1 and repeat the above steps.

[0037] As described above, the embodiment of the present invention discloses a blackbody calibration device and an application method thereof, and the beneficial effects achieved are as follows:

[0038] By arranging the black body and the temperature measuring probe in a temperature measuring box, and providing a temperature control device in the temperature measuring box, the temperature measurement calibration is not affected by outdoor climate conditions, so that higher temperature measurement accuracy can be achieved, and the accuracy of temperature measurement calibration is greatly improved; at the same time, a motion mechanism is provided in the temperature measuring box to drive the temperature measuring probe to rotate, so that the temperature measuring probe points to the black body during calibration and to the object to be detected during detection, so as to avoid inaccurate or failed temperature measurement calibration caused by the black body being blocked by the object to be detected, and also reduce the requirements for the position and posture of the object to be detected.

[0039] Furthermore, by dividing the temperature measuring box into a first compartment and a second compartment, placing the black body and the temperature measuring probe respectively, it is ensured that the temperature of the first compartment where the black body is located is more constant, which can further improve the calibration accuracy.

[0040] In the above embodiments, the description of each embodiment has its own emphasis. For parts that are not described in detail in a certain embodiment, reference can be made to the relevant descriptions of other embodiments.

[0041] The above embodiments are only used to illustrate the technical solutions of the present invention rather than to limit them. A person skilled in the art should understand that the technical solutions described in the above embodiments may still be modified, or some of the technical features may be replaced by equivalents. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present invention.

Claims

1. A blackbody calibration device, characterized in that: include: A temperature measuring box with a temperature control device and a motion mechanism inside, a black body placed in the temperature measuring box, and a temperature measuring instrument, wherein the temperature measuring instrument includes a temperature measuring probe located in the temperature measuring box, and a test channel connected to the outside is opened on the temperature measuring box; the temperature control device is used to control the inside of the temperature measuring box at a set temperature, and the motion mechanism is used to drive the temperature measuring probe to rotate; when calibrating, the temperature measuring probe is driven by the motion mechanism to point to the black body; when testing, the temperature measuring probe is driven by the motion mechanism to point to the object to be tested located outside the temperature measuring box through the test channel; The temperature measuring box is divided into a first compartment and a second compartment, the black body and the temperature control device are located in the first compartment, the temperature measuring probe and the motion mechanism are located in the second compartment, a connecting channel is provided between the first compartment and the second compartment, and the test channel is provided in the second compartment; the temperature of the first compartment is kept constant at the set temperature of the black body under the action of the temperature control device; when calibrating, the temperature measuring probe is driven by the motion mechanism to point to the black body through the connecting channel; The motion mechanism is specifically a swing mechanism.

2. The blackbody calibration device according to claim 1, characterized in that: Also includes: a control unit connected to the motion mechanism, and a detection unit connected to the control unit; The detection unit is used to detect whether there is an object to be detected in the target space, and if so, send a detection signal to the control unit; The control unit is used to control the movement of the motion mechanism after receiving the detection signal, so as to drive the temperature measuring probe to point to the object to be detected.

3. The blackbody calibration device according to claim 2, characterized in that: The first compartment and the second compartment are separated by a partition, the connecting channel is a first through hole arranged on the partition; the testing channel is a second through hole arranged on the second compartment.

4. The blackbody calibration device according to claim 3, characterized in that: The black body, the first through hole and the temperature measuring probe are located on a first straight line; The temperature measuring probe, the second through hole and the object to be detected are located on a second straight line.

5. The blackbody calibration device according to claim 4, characterized in that: The first straight line and the second straight line are perpendicular.

6. An application method of the blackbody calibration device according to claim 1, characterized in that: The following steps are involved: S1. The temperature probe detects the temperature of the black body; S2. The temperature measuring instrument is calibrated according to the temperature of the monitored black body; S3. When the object to be detected enters the target space, the motion mechanism drives the temperature probe to point to the object to be detected; S4. The temperature probe detects the temperature of the object to be detected; S5. After the object to be detected leaves the target space, the motion mechanism drives the temperature measuring probe to point to the black body.

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