METHOD AND DEVICE FOR CONTACTLESS MEASUREMENT OF A TEMPERATURE

Abstract

A method and device for contactless measurement of a temperature, in particular pyrometer, preferably 1-point pyrometer. The measuring device (1) has a camera (4) for recording an image (7′) of an environment (7) of a measurement spot (9) and a processor for ascertaining and outputting, in particular displaying, a location of the measurement spot in the image. For the temperature measurement, an environment (7) of a measurement spot (9) is recorded as an image and a location of the measurement spot (9) in the environment (7) is calculated and output in the image (7′).

Claims

1. A method for contactless measurement of a temperature, the method comprising: recording an environment (7) of a measurement spot (9) as an image; and calculating and outputting a location of the measurement spot (9) in the environment (7) in the image (7′).

2. The method according to claim 1, further comprising ascertaining a distance to the measurement spot (9).

3. The method according to claim 1, further comprising orienting a recording direction for the image (7′) in parallel to a measurement direction.

4. The method according to claim 1, further comprising executing a temperature measurement using a pyrometer (2).

5. The method of claim 4, wherein the pyrometer is a 1-point pyrometer.

6. The method according to claim 4, further comprising linking a measurement result of the temperature measurement to the image (7′).

7. The method according to claim 6, further comprising linking further data to at least one of the image or to the measurement result.

8. The method according to claim 7, wherein the further data comprises at least one of a recording point in time or a user.

9. A measuring device (1) for contactless measurement of a temperature, the measuring device comprising: a camera (4) for recording an image (7′) of an environment (7) of a measurement spot (9); and a processor configured for ascertaining and outputting a location of the measurement spot in the image.

10. The measuring device (1) according to claim 9, further comprising a distance measuring device for determining the distance to the measurement spot (9).

11. The measuring device (1) according to claim 9, further comprising means for detecting further data including at least one of a recording point in time and/or a user.

12. The measuring device (1) according to claim 9, wherein the processor is configured to cause the measuring device to: record the environment (7) of the measurement spot (9) as the image; and calculate and output the location of the measurement spot (9) in the environment (7) in the image (7′).

13. The measuring device (1) of claim 9, wherein the measuring device is a 1-point pyrometer.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0023] The invention is explained in more detail hereinafter with reference to the appended exemplary embodiments.

[0024] In the figures:

[0025] FIG. 1: shows a block diagram of a measuring device according to the invention.

[0026] FIG. 2: shows a schematic illustration of a measurement environment, having a measuring device having a recorded image and overlaid measurement spot, an

[0027] FIG. 3: shows an exemplary measurement log.

DETAILED DESCRIPTION

[0028] FIG. 1 shows a block diagram of a measuring device 1 according to the invention. The measuring device has a contactless temperature sensor 2. This temperature sensor 2 is, for example, a 1-point pyrometer. However, the temperature sensor 2 can also be a different pyrometer or bolometer. The temperature sensor 2 has a diverging measurement spot. This means that the diameter of the measurement spot increases with increasing distance to the measured object.

[0029] The measuring device 1 furthermore has a distance measuring device 3, which is used to determine a distance between a measured object and the measuring device 1. The distance measuring device 3 can be, for example, an optical or acoustic distance measuring device or can be based on another measurement principle.

[0030] The measuring device 1 furthermore has a camera 4, which is designed to record an image of the measurement environment. In particular, the camera 4 can be designed to record a live video.

[0031] The measuring device 1 has a display screen 6, on which a recorded image is displayable.

[0032] Finally, the measuring device 1 has a processor 5 or microcontroller, which is connected to the temperature sensor 2, the distance measuring device 3, and the camera 4. The processor 5 is connected to the display screen 6 to display the image. The processor 5 is designed to calculate the diameter of the measurement spot on the measured object from a distance measurement of the distance measuring device 3 and to show it overlaid in a recorded image. This can also take place in particular in real time in a live video of the camera 4.

[0033] The processor 5 can moreover be designed to process further data, such as time of day and a user identification. In addition, the measuring device can have further sensors and/or measuring devices, which are connected to the processor 5 to process further data.

[0034] The processor 5 is furthermore designed to execute a method according to the invention, which is explained in more detail hereinafter.

[0035] FIG. 2 shows by way of example an environment 7 in which a temperature measurement is carried out, for example using a measuring device 1 according to FIG. 1. This environment 7 can be located, for example, in the product receiving area of a food store. Various foods 8, represented by the various shapes, have been delivered at the product receiving area. An image 7′ of the environment 7 is now recorded using the measuring device 1 according to the method according to the invention. The recorded image 7′ is displayed on the display screen 6.

[0036] A temperature measurement is carried out using the temperature sensor 2. This has a measurement spot 9, which is shown by dashed lines in the environment 7.

[0037] The distance between measuring device 1 and the measured object 8 in the environment 7 is determined with the aid of the distance measuring device 3 of the measuring device 1.

[0038] The actual diameter of the measurement spot on the measured object 8 is calculated from the distance and the known divergence of the measurement spot, for example in the processor 5.

[0039] Finally, the measurement spot 9 is displayed as a virtual measurement spot 9′ having the calculated diameter in the image 7′. The result of the temperature measurement is linked to the image and the precise measurement location and can additionally be linked to further data, which are possibly provided on the processor 5.

[0040] Of course, a linkage to further data, such as the time of day, can also take place outside the measuring device 1, for example in an evaluation unit to which the measured values are possibly transmitted. The evaluation unit can also form a unit with the measuring device, so that only one device is necessary.

[0041] FIG. 3 shows by way of example a measurement log 10, which was created using a method according to the invention.

[0042] In the example, the measurement log 10 contains a recorded image 7′, in which the virtual measurement spot 9′ is shown. Furthermore, a temperature measured value assigned to the measurement spot, an ambient temperature, a time of day, a date, temperature limiting values, a user, the location of the measurement, batch and container designations, and possibly further data are included.

[0043] In this way, a fixed relationship thus results between detected object, temperature, date, and time of day. The tester is also assigned to the measurement by a user login on the device. The measurement log contains all important items of information and can be stored or transmitted accordingly. Sample collection is simplified in this way and less susceptible to error.

LIST OF REFERENCE SIGNS

[0044] 1 measuring device [0045] 2 temperature sensor [0046] 3 distance measuring device [0047] 4 camera [0048] 5 processor [0049] 6 display screen [0050] 7 environment [0051] 7′ image of the environment [0052] 8 food [0053] 9 measurement spot [0054] 9′ virtual measurement spot [0055] 10 measurement log