JP2017053755A - Temperature measuring instrument for three-dimensional devices, temperature measuring instrument for combustion engines, and temperature measuring method for combustion engines and three-dimensional devices - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a temperature measuring instrument for three-dimensional devices and the like that can measure temperatures less expensively with higher precision than by the prior art in limited areas of internal spaces of three-dimensional devices, such as in engine cylinders, with the result that temperatures in three-dimensional devices can be measured less expensively with higher precision.SOLUTION: Different kinds of gas components Gi are supplied to each of measurable sub-areas Rmi set within a measurable area Rm, terahertz waves Te of multiple wavelengths within the frequency range of 0.01 THz to 10 THz are transmitted toward an internal space R of a three-dimensional device and terahertz waves Te of multiple wavelengths having passed the measurable area Rm are received to detect the intensity of the terahertz waves Te of multiple wavelengths. The variation quantity of this intensity of the terahertz waves Te of multiple wavelengths is compared with the variation characteristics of each wavelength of the terahertz waves in each of preset multiple gas components Gi to calculate the temperatures Tmi of the measurable sub-areas Rmi.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a three-dimensional device temperature measuring device, a combustion engine temperature measuring device, a combustion engine, and a three-dimensional device temperature measuring method capable of measuring the temperature of the internal space of the three-dimensional device with low cost and high accuracy.

  Since the combustion state in the cylinder of the internal combustion engine strongly affects the fuel consumption and exhaust gas purification performance of the vehicle equipped with this internal combustion engine, it is necessary to control the combustion state in the cylinder. Therefore, it is very important to grasp the temperature of the internal space of the cylinder. The measurement of the temperature of the internal space of the cylinder is to create a temperature distribution by measuring the temperature of a local region of the internal space of the cylinder and aggregating the local temperature corresponding to the measurement location. It is common.

  As a method of measuring the temperature of a local region of the internal space of the cylinder, a method of combining a CT method (computer tomography) with a two-dimensional laser induced fluorescence method (LIF method) or a laser absorption method, and A method of measuring the temperature of a local region in the internal space of a cylinder based on the emission intensity of the phosphor by irradiating this phosphor with laser light by mixing phosphor (particles) into the cylinder Is used.

  However, this measurement method using a phosphor has many problems as follows. As a first problem, since it is necessary to mix phosphors in the cylinder, it cannot be used in the internal space of a normal engine cylinder, and the internal space in which this measurement technique can be used is limited.

  As a second problem, in this measurement method, even if laser light is incident on the phosphor, the phosphor may not emit light due to a so-called deactivation phenomenon, and therefore it may be difficult to estimate the temperature.

  As a third problem, this measurement method cannot accurately identify the measurement position because the measurement accuracy of the position of the phosphor from which the emission intensity is detected is not high.

  On the other hand, it is related to concentration measurement of particulate matter, not temperature measurement, but it is a particulate matter collection amount detection device for detecting PM accumulation distribution of a filter arranged in the exhaust system of a diesel engine. As for the collection device that is arranged in the flow path through which the gas containing the particulate matter flows and collects the particulate matter, the frequency is several tens GHz to several THz from the outside of the collection device to the collection device. An irradiating means for irradiating the electromagnetic wave and a receiving means for detecting the intensity of the electromagnetic wave transmitted through the collection device are provided facing each other, and the irradiating means irradiates the electromagnetic wave at two or more irradiation angles, A collection amount distribution detection device for particulate matter that detects the collection distribution of the particulate matter in the collection device by detecting the intensity of the electromagnetic wave transmitted at an angle of each by the receiving means has been proposed (example) If, see Patent Document 1).

JP 2011-58374 A

  The present inventor is not a conventional measurement method for measuring the temperature of a local area in an internal space using a phosphor and laser light, but has a radio wave transmissivity and a light straightness between the radio wave and the light. By using a terahertz wave having a wavelength and a frequency in the range of 0.01 THz to 10 THz, the above first to third problems of the conventional measurement technique are solved, and an internal gas containing a gas such as a cylinder We obtained the knowledge that the temperature of the local area of the space can be measured with low cost and high accuracy, and as a result, the temperature of the internal space can be measured with low cost and high accuracy.

  Furthermore, the present inventor has shown that the attenuation amount of the terahertz wave after passing through the measurement region, that is, the amount of change in intensity is closely related to the temperature of the measurement region, and as schematically shown in FIG. We found that the relationship between attenuation, temperature, and concentration differs for each type of gas component molecule (for example, carbon dioxide, nitrogen, oxygen, water, etc.), and by using terahertz waves with multiple wavelengths in a specific range. The knowledge that the measurement temperature of the measurement area can be measured was obtained.

  In addition, since spectrum analysis of terahertz waves can be performed, if there is a spectrum that is characteristic of each gas component, the spectrum of each gas component can be detected by detecting the transmitted light of terahertz waves. Thus, it has been found that the temperature of a certain region of a gas component can be measured by observing the amount of change in the spectrum of the specific gas component.

  FIG. 3 does not show the relationship between the transmission spectrum of the terahertz wave in the actual gas component and the frequency, but schematically shows the transmission spectrum of the terahertz wave with the gas component (G1) and the gas component (G2). There are some frequencies with significant attenuation (downward arrow part), and the attenuation varies depending on each frequency. However, the frequency with significant attenuation is different between the gas component (G1) and the gas component (G2). FIG. 6 is a schematic diagram for explaining that the attenuation amounts are different, and is not a diagram corresponding to an actual specific gas component.

  The present invention has been made in view of the above, and an object of the present invention is to reduce the temperature of a local region in the internal space of a three-dimensional device, for example, in a cylinder of an engine, at a lower cost than in the prior art. And, as a result, it is possible to measure the temperature of the internal space of the three-dimensional device at low cost and with high accuracy, the temperature measuring device of the three-dimensional device, the temperature measuring method of the three-dimensional device, the temperature measuring device of the combustion engine, And providing a combustion engine.

  In order to achieve the above object, a temperature measuring device for a three-dimensional device according to the present invention is a temperature measuring device that measures the temperature of the internal space of a three-dimensional device, and each of the small measurement regions set inside the measurement region. A gas component supply device that supplies different types of gas components, and a terahertz wave having a plurality of wavelengths within a range of 0.01 THz to 10 THz toward the internal space of the three-dimensional device. A transmitting unit for transmitting to the receiving unit, a receiving unit for receiving terahertz waves of a plurality of wavelengths passing through the measurement region, and a change in intensity of the terahertz waves of a plurality of wavelengths received by the receiving unit are set in advance. Further, the temperature calculation for calculating the temperature in each of the small measurement regions in comparison with the change characteristics at each wavelength of the terahertz wave in each of the gas components Configured with the location.

  That is, terahertz waves of multiple wavelengths that have passed through the measurement area are received by the receiving unit, and the amount of change (attenuation) in the received signal intensity (transmission intensity that has passed through the measurement area) is calculated in the temperature calculation device. Compared with the theoretically calculated relationship between the terahertz wave attenuation of each frequency and the temperature, it passes through each gas component in the small measurement area provided in the measurement area that is the terahertz wave passage area. The temperature for each gas component (molecule) in each small measurement region is calculated from the absorbed signal intensity, and the temperature in the measurement region is calculated from these temperatures. Since the intensity of the terahertz wave has a close relationship with the amplitude of the terahertz wave, this amplitude may be used as a substitute for the intensity when the amplitude of the terahertz wave can be detected or calculated.

  In this configuration, in order to calculate the temperature of the internal space of the three-dimensional device, different types of gas components (molecules) are supplied to each of the small measurement regions set inside the measurement region, and a plurality of wavelengths Transmit terahertz waves. The temperature is estimated by detecting a characteristic change in absorption spectrum for each gas component. By supplying these different gas components to different small measurement regions, it becomes possible to simultaneously measure the temperature distribution of the entire terahertz wave passage region. In other words, as in the conventional technology so far, a structure in which a large number of components such as sensors, wiring, and laser optical systems are arranged has been redesigned, and a pair of opposing sensor systems and temperature-stable molecules (gas components). It becomes possible to detect the temperature distribution in a system that supplies a trace amount.

  As a result, the rotational level of the molecule is directly observed using the specific wavelength of the terahertz wave that is resistant to dirt such as wrinkles, compared to the conventional measurement method. The deactivation phenomenon of the fluorescent substance can be avoided. Moreover, it is not necessary to mix a reactive fluorescent substance in the internal space of the three-dimensional apparatus. Furthermore, since it is a mechanism in which different molecules (gas components) are appropriately arranged on the path of the terahertz wave, it can be applied to an internal space other than the internal combustion engine such as a combustion chamber of a jet engine.

  According to this configuration, the position of transmitting and receiving the terahertz wave and the position where each gas component is supplied, not the position of the phosphor that detects the emission intensity that is difficult to specify with high accuracy as in the prior art Therefore, these positions can be accurately determined, and the temperature can be measured after clearly grasping the positions of the measurement area where the terahertz wave passes and the small measurement area where each gas component is supplied. The position becomes accurate.

  Further, in this configuration, unlike the laser-induced fluorescence method of the prior art, no phosphor and laser light are used, so that there is no need for laser optical equipment, and the temperature of each area of the internal space of the three-dimensional device is set. Since there is no need to arrange a large number of parts for measurement, the apparatus can be simplified and the cost can be reduced. Further, since the phosphor is not mixed in the internal space of the three-dimensional device, it can be used in the internal space of a normal engine cylinder and the internal space in which the temperature measuring device of the present invention can be employed is not limited. In addition, it is not difficult to estimate the temperature due to the phosphor deactivation phenomenon.

  Therefore, by using a terahertz wave having a radio wave transmission property and light straight traveling property, having a wavelength between the radio wave and light and having a frequency in the range of 0.01 THz to 10 THz, a combustion apparatus such as a boiler or a gas turbine. As in the interior space, the temperature of the local area of the interior space of the stereoscopic device can be measured with lower cost and higher accuracy than the conventional technology. As a result, the temperature of the internal space of the stereoscopic device can be measured at lower cost and higher accuracy. Can be measured.

  In the three-dimensional device temperature measurement device, the transmission unit and the transmission unit are arranged so that the traveling direction of the terahertz wave transmitted from the transmission unit intersects the injection direction of each gas component injected from the gas component supply device. When the receiving unit and the gas component supply device are arranged, the temperature in a plurality of small measurement regions can be measured simultaneously in one traveling direction of the terahertz wave, so that the temperature can be measured efficiently.

  The traveling direction of this terahertz wave and the injection direction of each gas component may be orthogonal, but even in the area where there is an inclination and intersects, it becomes almost a pinpoint and the party can measure, The inclination increases the degree of freedom of arrangement of the device. In other words, even if it is impossible to attach the components under the orthogonal condition, the components can be attached while avoiding interference between the components under the condition that they should cross.

  Further, in the temperature measuring device of the above three-dimensional device, when any one or some combination or all of the transmission unit, the reception unit, and the gas component supply device are configured to be movable, the traveling direction of the terahertz wave Thus, the position of the measurement area or the small measurement area to which the gas component is supplied can be changed, and many places in the internal space of the stereoscopic apparatus can be measured with a small number of apparatuses.

  A combustion engine temperature measuring device according to the present invention for achieving the above object comprises the above three-dimensional device temperature measuring device, and is configured to measure the temperature of the internal space of the combustion engine. The same effects as the temperature measuring device can be obtained.

  Further, a combustion engine of the present invention for achieving the above object is provided with the temperature measuring device for the combustion engine, and is similar to the temperature measuring device and the temperature measuring device for the combustion engine. An effect can be produced.

  In particular, when the combustion engine is a combustion chamber such as a boiler or a gas turbine, for example, an increase in temperature can be achieved by changing the instruction signal for the fuel injection device provided in the combustion chamber from the temperature measured in the internal space. It is possible to reduce the heat load on the combustion chamber by giving an instruction to reduce the fuel injection amount when detected.

  In order to achieve the above object, a method for measuring a temperature of a three-dimensional device according to the present invention is the temperature measuring method for measuring the temperature of the internal space of a three-dimensional device, and for each of the small measurement regions set inside the measurement region. Supplying different types of gas components and transmitting terahertz waves having a plurality of wavelengths within a range of 0.01 THz to 10 THz toward the internal space of the three-dimensional device to the measurement region of the internal space. , Receiving the terahertz waves of a plurality of wavelengths passing through the measurement region, detecting the intensities of the terahertz waves of a plurality of wavelengths, and the amount of change in the intensity of the terahertz waves of the plurality of wavelengths The method is characterized in that the temperature in each of the small measurement regions is calculated in comparison with the change characteristics of each of the gas components at each wavelength of the terahertz wave. According to this method, it is possible to achieve the same effects as the above-described temperature measurement device for a three-dimensional device.

  According to the three-dimensional device temperature measuring device, the combustion engine temperature measuring device, the combustion engine, and the three-dimensional device temperature measuring method of the present invention, the intermediate wavelength between the radio wave and the light having the radio wave permeability and the light straightness is obtained. Utilizing terahertz waves with a plurality of wavelengths in the frequency range of 0.01 THz to 10 THz, supplying different types of gas components to each of the small measurement regions set inside the measurement region, By calculating the temperature of each gas component from the change characteristics at each wavelength of the terahertz wave with respect to the gas component, it is possible to calculate the temperature in the small measurement region to which each gas component is supplied. Like the internal space, the temperature of the local area of the internal space of the stereoscopic device can be measured with lower cost and higher accuracy than the conventional technology, and as a result, the temperature of the internal space of the stereoscopic device can be reduced. One can be measured with high accuracy.

It is a figure which shows typically the structure of the temperature measuring device of the three-dimensional apparatus of embodiment which concerns on this invention in the combustion engine of 1st Embodiment which concerns on this invention, and the temperature measuring device of a combustion engine. It is a figure which shows typically the structure of the temperature measuring device of the three-dimensional apparatus of embodiment which concerns on this invention in the combustion engine of 2nd Embodiment which concerns on this invention, and the temperature measuring device of a combustion engine. It is a figure for demonstrating the relationship between the transmission spectrum of the terahertz wave received with the receiving unit according to gas component, and the frequency with the large attenuation amount by temperature. It is a figure which shows typically an example of the relationship between the temperature in the specific frequency of the terahertz wave which passed the specific gas component of a specific density | concentration, and the logarithm of transmitted light intensity ratio.

  DESCRIPTION OF EMBODIMENTS Hereinafter, a three-dimensional device temperature measurement device, a combustion engine temperature measurement device, a combustion engine, and a three-dimensional device temperature measurement method according to embodiments of the present invention will be described with reference to the drawings. In the present embodiment, the internal combustion engine is described as an example of the combustion engine, and the cylinder (cylinder) of the internal combustion engine is employed as an example of the three-dimensional device. However, the present invention is not limited to this, for example, A gas turbine or the like may be a combustion engine, and its combustion chamber may be a three-dimensional device. The three-dimensional device may not be included in the combustion engine.

  As a temperature measuring device for a three-dimensional apparatus according to an embodiment of the present invention, a temperature measuring device for a combustion engine that measures the temperature in a cylinder of an engine (internal combustion engine: combustion engine) will be described. That is, the temperature measuring device of the three-dimensional device of this embodiment is also the temperature measuring device of the combustion engine of the embodiment of the present invention, and this engine is also the combustion engine of the embodiment of the present invention.

  As shown in FIG. 1, the combustion engine 1 of the first embodiment according to the present invention includes a three-dimensional device temperature measurement device (in this embodiment, a combustion engine temperature measurement device according to the present invention). The combustion engine 1 is a combustion engine such as a boiler or a gas turbine, and is disposed inside the combustion chamber 2 of the combustion engine 1. In order to introduce and burn the air A and the fuel F, an air supply device 3 and a fuel injection device 4 are provided.The air supply device 3 and the fuel injection device 4 are configured to have a flow rate adjusting function, and are controlled by a control device. 1, a thick line FL in Fig. 1 shows an image of a flame in which fuel is burning.

  Then, the transmission unit 12 and the reception unit 13 of the terahertz wave Te of the temperature measuring device 10 of this combustion engine are arranged so that the terahertz wave Te passes through the inside of the combustion chamber 2. In addition, a gas component supply device (gas supply nozzle) 11i and a flow rate adjuster 15 for adjusting the flow rate of each of these gas component supply devices 11i are provided.

  These gas component supply devices 11i are supported by the support 5 along the traveling direction of the terahertz wave Te so that the gas component Gi supplied into the combustion chamber 2 intersects the terahertz wave Te. It is preferable to reduce the influence on the combustion chamber 2 by forming the support 5 with a porous structure such as a metal block or a metal mesh. Further, the gas component supply device 11i is configured to inject as little as possible by using a Laval nozzle or the like so as not to diffuse as much as possible.

  In the case where the combustion engine 1 is a combustion chamber 2 such as a boiler or a gas turbine as shown in FIG. 1, an air supply device 3 provided in the combustion chamber 2 based on the temperature Tmi measured in the internal space R; By changing the instruction signal for the fuel injection device 4, for example, when an increase in temperature is detected, an instruction to reduce the supply air amount and the fuel injection amount is given to reduce the thermal load on the combustion chamber 2. Is possible.

  As shown in FIG. 2, the combustion engine 1 </ b> A according to the second embodiment of the present invention is a three-dimensional device temperature measurement device according to the present invention (also in this example, the temperature measurement of the combustion engine). It is a device: hereinafter, it is configured with a temperature measuring device 10). The combustion engine 1A is an internal combustion engine having a piston 6. In order to introduce and burn the fuel F into the combustion chamber 2 of the combustion engine 1A, the fuel injection device 4 and intake air (not shown) are taken. An intake valve for introduction and an exhaust valve for discharging combustion gas are provided.

  At the same time, the transmission unit 12 and the reception unit 13 of the terahertz wave Te of the temperature measuring device 10 of this combustion engine are arranged so that the terahertz wave Te passes through the inside of the combustion chamber 2. Further, the gas component supply device 11i is arranged along the traveling direction of the terahertz wave Te so that the gas component Gi supplied into the combustion chamber 2 intersects the terahertz wave Te. This gas component supply device 11i is embedded on the cylinder head 7 side so that the gas component (molecule) Gi is not diffused as much as possible to the small measurement flow area Rmi provided in the measurement area Rm of the internal space R using a Laval nozzle or the like. And it is configured to inject in a minute amount. Further, when the temperature measurement device 10 of the combustion engine detects a high temperature portion where the temperature Tmi detected in the small measurement basin Rmi is equal to or higher than a preset temperature, the fuel injection amount from the fuel injection device 4 is reduced. Be controlled.

  In more detail, as shown in FIGS. 1 and 2, the temperature measurement device 10 includes a temperature of a small measurement region Rmi provided in a measurement region Rm inside the internal space R of the engine (stereoscopic device) 1. This is a temperature measurement device that measures Tmi. In this temperature measurement device 10, gas component supply devices 11i that supply different types of gas components Gi to each of the small measurement regions Rmi set inside the measurement region Rm. And a transmission unit 12 that transmits terahertz waves Te having a plurality of wavelengths in the range of 0.01 THz to 10 THz toward the measurement region Rm, and terahertz waves having a plurality of wavelengths that pass through the measurement region Rm. The receiving unit 13 is configured to receive Te.

  At the same time, the amount of change in the intensity of the terahertz waves Te of a plurality of wavelengths received by the receiving unit 13 is compared with the change characteristics at each wavelength of the terahertz waves Te in each of the gas components Gi set in advance by experiments or the like. The temperature calculation device 14 that calculates the temperature Tmi in each of the small measurement regions Rmi is provided.

  Then, the transmission unit 12, the reception unit 13, and the gas component supply are performed so that the traveling direction of the terahertz wave Te transmitted from the transmission unit 12 and the injection direction of each gas component Gi injected from the gas component supply device 11i intersect each other. The apparatus 11i is arranged and configured. Thereby, the temperature Tmi of a plurality of small measurement regions Rmi can be simultaneously measured with respect to one traveling direction of the terahertz wave Te so that the temperature can be efficiently measured.

  In addition, any one or some combination or all of the transmission unit 12, the reception unit 13, and the gas component supply device 11i are configured to be movable, and the measurement region Rm that is the traveling direction of the terahertz wave Te or the gas The position of the small measurement region Rmi to which the component Gi is supplied can be changed, and many places in the internal space R of the stereoscopic apparatus 1 can be measured with a small number of apparatuses.

  Next, a temperature measurement method for the three-dimensional apparatus according to the embodiment of the present invention will be described. This temperature measurement method of the three-dimensional device is a temperature measurement method for measuring the temperature Tmi of the internal space R of the three-dimensional device, and in this method, it is different for each of the small measurement regions Rmi set inside the measurement region Rm. While supplying various types of gas components Gi, terahertz waves Te having a plurality of wavelengths in the range of 0.01 THz to 10 THz are transmitted to the measurement region Rm of the internal space R toward the internal space R of the three-dimensional device. , Receiving the terahertz waves Te of a plurality of wavelengths passing through the measurement region Rm, detecting the intensities of the terahertz waves Te of the plurality of wavelengths, and the amount of change in the intensity of the terahertz waves Te of the plurality of wavelengths, The temperature Tmi in each of the small measurement regions Rmi is calculated by comparing with the change characteristics at each wavelength of the terahertz wave Te in each of the set gas components Gi. Is a method which is characterized in.

  According to the temperature measuring device 10 and the three-dimensional device temperature measuring method configured as described above, the reception unit 13 receives the terahertz waves Te having a plurality of wavelengths that have passed through the measurement region Rm, and receives the received signal strength (measurement region as the measurement region). The amount of change (attenuation) of the transmitted transmission intensity) is compared with the relationship between the attenuation of the terahertz wave Te of each frequency theoretically calculated by the calculation mechanism in the temperature calculation device and the temperature, and the terahertz wave Te From the signal intensity absorbed through each gas component Gi in the small measurement region Rmi provided in the measurement region Rm, which is the passage region, for each gas component (molecule) Gi in each of the small measurement regions Rmi All the temperatures Ti are calculated, and the temperature Tmi of the measurement region Rmi is calculated from these temperatures Ti. Note that the intensity of the terahertz wave Te has a close relationship with the amplitude of the terahertz wave Te. Therefore, when the amplitude of the terahertz wave Te can be detected or calculated, this amplitude may be used as a substitute for the intensity.

  In this configuration, in order to calculate the temperature Tmi of the internal space R of the three-dimensional device, different types of gas components Gi are supplied to each of the small measurement regions Rmi set inside the measurement region Rm, and a plurality of gas components Gi are supplied. A terahertz wave Te having a wavelength is transmitted. As shown in FIG. 3, the wavelength (or frequency = wave phase velocity / wavelength) at which the relationship between the amount of change in the intensity (attenuation or absorption) of the terahertz wave Te having a plurality of wavelengths and the temperature T appears remarkably is The temperature Tmi in the small measurement region Rmi to which each gas component Gi is supplied can be calculated by properly using the wavelength, since it varies depending on the type of the gas component Gi.

  The relationship between the amount of change in the terahertz wave Te caused by the temperature Tm in the measurement region Rm and the temperature Tm in the measurement region Rm is shown in FIG. 4 in advance for each gas component Gi and its concentration. Calibration data as shown in FIG. 4 is created for each gas component Gi and for each concentration. Based on the calibration data for each gas component Gi and for each concentration, the temperature Tmi of the small measurement region Rmi is calculated from the amount of change in the detected terahertz wave Te during temperature measurement. That is, since the supply amount of the gas component Gi can be measured by the gas supply device 11i, the temperature Ti is calculated from the calibration data corresponding to the concentration of the gas component Gi corresponding to the supply amount. Note that the number of wavelengths of the terahertz wave Te to be used is two or more, and the upper limit is practically determined and is about 100 in terms of calculation capability, but normally about 2 to 8 is conceivable.

  Although the concentration measured by the gas supply device 11i can be used as the concentration of the gas component Gi, when the number of wavelengths of the terahertz wave Te used is large, not only the temperature Tmi of the small measurement region Rmi but also this temperature Tmi. Therefore, the concentration of the gas component Gi can be calculated from the attenuation amount of the terahertz wave Te. Therefore, the concentration of the gas component Gi in the acquired data obtained by this measurement and the concentration of the known gas component Gi measured by the gas supply device 11i. It is preferable to compare the values and check the supply accuracy of the gas component Gi in the gas supply device 11i and the measurement accuracy of the terahertz wave Te.

  In other words, by detecting the attenuation amount of the terahertz wave Te for each gas component Gi, each gas component Gi with respect to the temperature T calculated from the intensity of the terahertz wave Te detected by the receiving unit 13. Can be measured as the temperature Tmi of the small measurement region Rmi supplied with the respective gas components Gi. The number of types of gas components Gi to be used is the number of small measurement regions Tmi (i = 1 to I: I = positive number) to be measured at the same time. As the gas components (molecules) Gi to be supplied, , Oxygen, carbon monoxide, nitrogen dioxide, nitric oxide, water, unburned HC, and the like. As this gas component, it is necessary to select a gas component (molecule) that can detect a difference in absorption spectrum with a terahertz wave Te due to a temperature difference and that is not thermally decomposed or difficult to thermally decompose.

  Therefore, combustion of boilers, gas turbines, and the like by utilizing a terahertz wave Te having a radio wave permeability and light straightness, having an intermediate wavelength between radio waves and light and having a frequency in the range of 0.01 THz to 10 THz. Like the internal space R of the combustion apparatus 1A such as the apparatus 1 or the internal combustion engine, the temperature Tmi of the local region Rmi of the internal space R of the three-dimensional apparatus can be measured with lower cost and higher accuracy than the prior art, and as a result The temperature Tmi of the internal space R of the stereoscopic apparatus can be measured with low cost and high accuracy.

  According to the three-dimensional device temperature measuring device 10, the combustion engine temperature measuring device 10, and the combustion engine and three-dimensional device temperature measuring method configured as described above, the radio wave and light having radio wave permeability and light straightness are provided. By utilizing terahertz waves Te having a wavelength in the range of 0.01 THz to 10 THz and having a frequency in the range of 0.01 THz to 10 THz, different types of small measurement regions Rmi set inside the measurement region Rm By supplying the gas component Gi and calculating the temperature Ti of each gas component Gi from the change characteristics at each wavelength of the terahertz wave Te with respect to each gas component Gi, a small measurement region to which each gas component Gi is supplied Since the temperature Tmi in Rmi can be calculated, the temperature Tmi of the local region Rmi in the internal space R of the three-dimensional device, like the internal space R of the cylinder of the engine 1, Than coming technology can be measured at low cost and with high accuracy, as a result, it is possible to measure the temperature Tmi of the internal space R of the three-dimensional device at low cost and with high accuracy.

  In addition, the position where the terahertz wave Te is transmitted and received, and the position where each gas component Gi is supplied, are used instead of the position where the fluorescent substance whose emission intensity is difficult to be detected as in the prior art is detected. Therefore, these positions can be accurately determined, and the temperature Tmi can be measured after clearly knowing the positions of the measurement region Rm through which the terahertz wave Te passes and the small measurement region Rmi to which each gas component Gi is supplied. Therefore, the measurement position becomes accurate.

  Further, in this configuration, unlike the laser-induced fluorescence method of the prior art, no phosphor and laser light are used, so that there is no need for laser optical equipment, and the temperature of each area of the internal space of the three-dimensional device is set. Since there is no need to arrange a large number of parts for measurement, the apparatus can be simplified and the cost can be reduced.

  Further, since the phosphor is not mixed in the internal space R of the three-dimensional device, it can be used even in the internal space of a cylinder of a normal internal combustion engine, and the internal space R in which the temperature measuring device 10 of the present invention can be used is not limited. . In addition, it is not difficult to estimate the temperature due to the phosphor deactivation phenomenon.

DESCRIPTION OF SYMBOLS 1, 1A Combustion engine 2 Combustion chamber 3 Air supply apparatus 4 Fuel injection apparatus 5 Support body 6 Piston 7 Cylinder head 10 Three-dimensional apparatus temperature measurement apparatus 11i Gas component supply apparatus 12 Transmission unit 13 Reception unit 14 Temperature calculation apparatus 15 Flow rate adjuster 20 Control device Gi Gas component R Internal space Rm Measurement area Rmi Small measurement area Te Terahertz wave (transmitted wave)

Claims (6)

In the temperature measurement device that measures the temperature of the internal space of the three-dimensional device,
A gas component supply device that supplies different types of gas components to each of the small measurement regions set inside the measurement region;
A transmission unit for transmitting terahertz waves having a plurality of wavelengths within a range of 0.01 THz to 10 THz toward the internal space of the stereoscopic apparatus to the measurement region of the internal space;
A receiving unit for receiving terahertz waves of a plurality of wavelengths passing through the measurement region;
Compared with the amount of change in the intensity of the terahertz waves of a plurality of wavelengths received by the receiving unit and the change characteristics of each of the terahertz waves in each wavelength of the gas component set in advance, in each of the small measurement regions A temperature measuring device for a three-dimensional device, comprising a temperature calculating device for calculating temperature.   The transmission unit, the reception unit, and the gas component supply device are arranged so that the traveling direction of the terahertz wave transmitted from the transmission unit intersects the injection direction of each gas component injected from the gas component supply device. The temperature measuring device for a three-dimensional device according to claim 1 configured as described above.   The temperature measuring device for a three-dimensional device according to claim 1 or 2, wherein any one or some combination or all of the transmission unit, the reception unit, and the gas component supply device are configured to be movable.   A temperature measuring device for a combustion engine comprising the three-dimensional device temperature measuring device according to any one of claims 1 to 3 and configured to measure a temperature of an internal space of the combustion engine.   A combustion engine comprising the combustion engine temperature measuring device according to claim 4. In the temperature measurement method for measuring the temperature of the internal space of the three-dimensional device,
While supplying different types of gas components to each of the small measurement areas set inside the measurement area,
Transmitting terahertz waves having a plurality of wavelengths within a range of 0.01 THz to 10 THz toward the internal space of the stereoscopic apparatus to the measurement region of the internal space;
Receiving the terahertz waves of a plurality of wavelengths passing through the measurement region and detecting the intensity of the terahertz waves of a plurality of wavelengths;
The amount of change in the intensity of the terahertz waves of the plurality of wavelengths is compared with the change characteristics at each wavelength of the terahertz wave in each of the gas components set in advance, and the temperature in each of the small measurement regions is calculated. A method for measuring the temperature of a three-dimensional apparatus characterized by the above.

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