JPH11148874A - Method and instrument for measuring internal temperature of object - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method by which the internal temperature of an object can be measured in a non-contacting state. SOLUTION: In a method for measuring internal temperature of object, the surface temperature of a kind of fish paste product F is measured by means of a temperature sensor 1 positioned to a prescribed location a prescribed period of time after the fish product F comes out of a refrigerating machine and the detected temperature is inputted to a discriminating and processing section 3 and, at the same time, compared with a previous inputted set temperature. When the detected temperature is lower than the set temperature, it is estimated that the internal temperature of the fish product F is such a low value that the paste F will not stale later and, when the detected temperature is higher than the set temperature, it is estimated that the internal temperature of the product F is such a high temperature that the product F will become stale later.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method and a device for measuring a temperature inside an object.

[0002]

2. Description of the Related Art In the manufacturing process of bamboo rings, for example, a raw kneaded product is roasted in a roaster and then cooled to about 10 ° C. in a cooler.
Packaging is carried out after dimensional inspection, etc., and finally, it is packed in a box packing machine.

[0003] The above temperature test is to check the internal temperature of the bamboo ring coming out of the cooler. If the internal temperature is high,
This is because such bamboo rings need to be eliminated because the boxed bamboo rings will rot.

[0004] Conventionally, when measuring the internal temperature of a bamboo wheel, a probe for temperature measurement is inserted into the bamboo wheel itself, which is a product.

[0005]

According to the above-mentioned conventional temperature measuring method, a probe is inserted into a bamboo wheel as a product, so that the object to be measured cannot be shipped as a product. For this reason, temperature measurement had to be performed only on those arbitrarily extracted from many products.

Accordingly, an object of the present invention is to provide a temperature measuring method and a temperature measuring device inside an object which can measure the internal temperature of the object in a non-contact manner.

[0007]

According to a first aspect of the present invention, there is provided a method for measuring a temperature inside an object, comprising detecting a surface temperature of the object when a predetermined time has elapsed from the time when a thermal operation is performed. This is a method of estimating the temperature inside the object by comparing it with the set temperature.

Further, according to a second method for measuring the temperature inside an object of the present invention, a temperature change pattern on the surface of the object is obtained by detecting a surface temperature of the object from the time when the thermal operation is performed until a predetermined time has passed. This is a method of estimating the temperature inside the object by comparing the detected temperature change pattern and the detected temperature at the lapse of a predetermined time with the set temperature change pattern and the set temperature, respectively.

In order to solve the above-mentioned problems, a first aspect of the present invention is described.
The temperature measuring device inside the object includes a sensor unit for detecting the surface temperature of the object, and a determination processing unit for inputting the detected temperature from the sensor unit and comparing the set temperature with the set temperature to estimate the temperature inside the object. Things.

The second temperature measuring apparatus for measuring the inside of an object according to the present invention includes a plurality of sensor units for detecting the surface temperature of the object in time series, and a temperature change pattern obtained by inputting the detected temperatures from these sensor units. Determination processing for estimating the temperature inside the object by comparing the detected temperature change pattern and the temperature detected from the sensor unit for final detection in the time series with the previously input set temperature change pattern and set temperature, respectively. Part.

According to each of the temperature measuring methods and the temperature measuring devices described above, the detected temperature of the object surface is compared with the set temperature, or the detected temperature of the object surface and the detected temperature change pattern obtained in time series. And the set temperature and the set temperature change pattern, respectively, to estimate the temperature inside the object, so that the temperature inside the object can be measured without inserting a temperature measurement probe into the object. it can.

[0012]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A method and a device for measuring the temperature inside an object according to a first embodiment of the present invention will be described below with reference to FIGS.

In the first embodiment, as described in the section of the conventional example, a bamboo wheel cooled by a cooler (heated) has been described as an object for measuring the internal temperature. I do.

As shown in FIG. 1, a temperature measuring device used in this temperature measuring method includes a temperature sensor (sensor section) 1 for detecting a surface temperature of an object, and temperature data detected by the temperature sensor 1. Is input via the A / D converter 2 and is compared with a preset (input) set temperature to estimate the temperature inside the object (C).
PU) 3, a display unit (for example, a display device, a printer device, etc.) 5 for inputting and displaying a result determined by the determination processing unit 3 via the interface 4, and a display unit 5 connected to the determination processing unit 3. And a storage unit 6 for storing the set temperature.

Next, a temperature measuring method will be described. First, the surface temperature of the bamboo wheel F that has exited the cooler is detected by the temperature sensor 1 at a position where a predetermined time has elapsed (after the predetermined time has elapsed). The detected temperature data is input to the determination processing unit 3 via the A / D converter 2, where it is compared with the set temperature input from the storage unit 6 to estimate the internal temperature of the bamboo wheel F.

That is, when the surface temperature is lower than the set temperature, it is determined that the inside of the bamboo wheel F is sufficiently cooled and the internal temperature is low enough not to rot later. 5 is output. On the other hand, when the detected temperature is equal to or higher than the set temperature, the inside of the bamboo wheel F is not sufficiently cooled, and it is determined that the internal temperature is high enough to rot later. Is displayed in.

Here, the reason why the internal temperature of the bamboo wheel F can be determined (estimated) from the surface temperature will be described. That is, the surface temperature immediately after leaving the cooler of a good product sufficiently cooled by the cooler is, for example, lower than 10 ° C.,
Normally, the room temperature is 10 ° C. or higher, and therefore, as shown by the solid line in FIG. 2, the surface temperature gradually increases with time, but since the internal temperature is lower than 10 ° C., the change in the surface temperature rises very slowly. become.

However, if the cooling is insufficient and the bamboo ring is at least partially high enough to rot later, the heat of the bamboo ring itself will be transferred to the surface and will be indicated by the dotted line in FIG. As shown in the figure, the temperature rises sharply and exceeds the set temperature when a predetermined time has elapsed (after the predetermined time has elapsed).

Therefore, by detecting the surface temperature of the bamboo wheel F at the time when a predetermined time has elapsed after leaving the cooler, the bamboo wheel F is detected.
Can be measured whether or not the inside of the bamboo wheel F is sufficiently cooled, that is, how much the internal temperature of the bamboo wheel F is.

Of course, the elapsed time and the set temperature as the criteria are determined according to the material, dimensions, shape, room temperature and the like of the bamboo wheel, and are actually determined by experiments. Further, the position of the temperature sensor 1 is set such that the surface temperature of the bamboo wheel F can be detected just after a predetermined time has elapsed after the cooling device has left.

As described above, since the internal temperature of the bamboo wheel is estimated (measured) by detecting the surface temperature when a predetermined time elapses after leaving the cooler, the temperature inside the bamboo wheel is different from the conventional one. Compared to the method of inserting a sensor, measurement can be performed for all products, and there is no need to discard the product to be measured, which is very economical.

Next, a method and a device for measuring the temperature inside an object according to a second embodiment of the present invention will be described. In the first embodiment, the internal temperature of the bamboo wheel is determined by comparing the detected temperature after a predetermined time has elapsed with the set temperature.
In the embodiment, the judgment is made in consideration of the temperature change pattern on the bamboo wheel surface in addition to the comparison with the set temperature.

As shown in FIG. 3, the temperature measuring device used in this temperature measuring method has at least two temperature sensors (sensor units) for detecting the surface temperature of an object in time series.
11A and 11B (for example, one temperature sensor 11A is the surface temperature of the bamboo wheel immediately after leaving the cooler, and the other temperature sensor 1A
1B is arranged so as to detect the surface temperature of the bamboo ring at the time when a predetermined time has elapsed (after the predetermined time has elapsed)), and
The detected temperature data detected by the temperature sensors 11A and 11B are input via the A / D converter 12, and a temperature change pattern (specifically, a temperature gradient with respect to time) is obtained from the detected temperatures. The detected temperature change pattern and the temperature detected by the temperature sensor (final detection sensor) 11B at the final position in the time series;
A judgment processing unit (CPU) 13 for estimating the temperature inside the object by comparing a preset temperature change pattern and a preset temperature which are set (input) in advance, and a result determined by the judgment processing unit 13 A display unit (for example, a display device,
(A printer device, etc.) 15 and a storage unit 16 that is connected to the determination processing unit 3 and stores the set temperature change pattern and the set temperature.

Next, a method of measuring the temperature will be described. First, the surface temperature of the bamboo wheel F that has exited the cooler is detected by the temperature sensors 11A and 11B immediately after the bamboo wheel F exits the cooler and at both positions corresponding to a lapse of a predetermined time (after a lapse of the predetermined time). . These detected temperature data are A
Input to the determination processing unit 13 via the / D converter 12,
A temperature change pattern is obtained based on these two detected temperatures. Then, the detected temperature change pattern obtained here and the detected temperature at the elapse of the predetermined time are compared with the set temperature pattern and the set temperature input from the storage unit 16 to estimate the internal temperature of the bamboo wheel F. .

That is, when the detected temperature change pattern has a smaller degree of inclination than the set temperature change pattern and the detected temperature is lower than the set temperature, the inside of the bamboo wheel F is sufficiently cooled, and It is determined that the temperature is low enough not to rot, and that fact is displayed on the display unit 15. On the other hand, if the detected temperature change pattern has a greater degree of inclination than the set temperature change pattern and the detected temperature is equal to or higher than the set temperature, the inside of the bamboo wheel F is not sufficiently cooled, and the internal temperature will decay later. It is determined that the temperature is such a high temperature, and that fact is output on the display unit 6. Furthermore, even when the detected temperature is lower than the set temperature, if the detected temperature change pattern has a greater degree of inclination than the set temperature change pattern, the inside of the bamboo wheel F is still not sufficiently cooled, and It is determined that the temperature is high enough to rotten, and that fact is output on the display unit 6.

As described above, since the temperature change pattern is also used as a criterion in comparison with the case where the detected temperature is used as a criterion in the first embodiment, the internal temperature of the bamboo wheel can be more reliably estimated (measured). )can do.

In the second embodiment,
Although the temperature is detected at two locations to determine the temperature change pattern, a number of temperature detection locations, that is, a plurality of temperature sensors may be provided according to the measurement target or the measurement accuracy.

In each of the above embodiments,
It has been described that the determination result in the determination processing unit is sent to the display unit and displayed, but in parallel with the display or instead of the display,
The determination result may be sent to a bamboo wheel having a high internal temperature, that is, a removing device that removes a defective product, and the defective product may be automatically removed.

Also, in each of the above embodiments, the case where the bamboo ring is used as the measurement target has been described. However, the measurement target is not limited to the bamboo wheel, but the internal temperature of various objects such as foods is measured. In some cases, it can be applied.

[0030]

As described above, according to the method and apparatus for measuring the temperature inside an object according to the present invention, the detected temperature of the object surface is compared with the set temperature, or the detected temperature and detected temperature of the object surface are measured. The temperature inside the object is estimated by comparing the detected temperature change pattern obtained by the series with the set temperature and the set temperature change pattern, respectively. Since there is no need for insertion, measurement can be performed for all of a large number of objects, and there is no need to discard the objects to be measured, which is very economical.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a schematic configuration of a temperature measuring device according to a first embodiment of the present invention.

FIG. 2 is a graph showing a detected temperature for explaining a measurement principle of the temperature measurement device.

FIG. 3 is a block diagram illustrating a schematic configuration of a temperature measuring device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Temperature sensor 3 Judgment processing part 5 Display part 6 Storage part 11A Temperature sensor 11B Temperature sensor 13 Judgment processing part 15 Display part 16 Storage part

Claims (4)

[Claims] 1. A temperature inside an object, wherein a temperature inside the object is estimated by detecting a surface temperature of the object after a lapse of a predetermined time from the time when the thermal operation is performed and comparing the detected surface temperature with a set temperature. Measurement method. 2. The method according to claim 1, further comprising: detecting a surface temperature of the object from a time point at which the thermal operation is performed until a predetermined time elapses to obtain a temperature change pattern of the object surface; And estimating the temperature inside the object by comparing the set temperature change pattern and the set temperature, respectively. 3. A sensor unit for detecting a surface temperature of an object, and a judgment processing unit for inputting a detected temperature from the sensor unit and comparing the temperature with a preset temperature to estimate a temperature inside the object. A temperature measuring device inside an object, characterized in that: 4. A plurality of sensor units for detecting a surface temperature of an object in a time series, and a temperature change pattern is obtained by inputting the detected temperatures from the sensor units. Temperature measurement inside the object, comprising a judgment processing unit for estimating the temperature inside the object by comparing the temperature detected from the detection sensor unit with the preset temperature change pattern and the preset temperature, respectively. apparatus.