JPH04285885A - Method for measuring atmospheric temperature - Google Patents

Abstract

PURPOSE:To simultaneously and continuously measure atmospheric temps. at arbitrary altitudes without moving a balloon or flying a plurality of balloons. CONSTITUTION:When the atmospheric temps. of the sky are measured stepwise, a balloon 1 is flown and temps. in an altitude direction can be continuously measured by the distribution type temp. sensor due to the optical fiber 3 suspended along a cable 10. The optical fiber 3 is received in a protective tube so as not to receive tension and fixed by a filling material and the tube is suspended along the cable 10. In order to obtain accurate altitude when the balloon is fanned by a wind and the vertical position thereof is shifted, gyroscopes 4 fitted with altimeters are mounted to the terminal of the optical fiber 3 and the part in the vicinity of altitude desired to be measured thereof and the terminal 2 of the optical fiber being an upper end and the accurate position under the terminal 2 thereof are measured to calculate accurate altitude.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for measuring air temperature simultaneously and continuously over a long distance.

0002

2. Description of the Related Art Conventionally, like a radiosonde, measuring instruments (thermometer, altimeter) were mounted on a balloon and the temperature was measured at the height of the balloon by raising it to a predetermined height.

0003

[Problem to be Solved by the Invention] However, when measuring the temperature of areas with different altitudes using conventional methods,
It was necessary to raise multiple balloons to different heights, or to take measurements while moving one balloon. If it was necessary to measure more points, a considerable number of balloons had to be launched, which required a lot of effort and expense.

[0004] The present invention solves the problems of the prior art and provides a temperature measuring method that can simultaneously and continuously measure the atmospheric temperature at any altitude without moving a balloon or raising multiple balloons. It is in.

[0005]

[Means and effects for solving the problems] The gist of the present invention is to use a distributed temperature sensor using optical fiber as a temperature measuring device, which greatly increases the number of measurement points and allows continuous and simultaneous measurement. You can.

That is, the above-mentioned object of the present invention is to lay an optical fiber housed in a protective tube along the cable of an airborne object, and connect the end of the optical fiber near the airborne object to the vicinity of the altitude to be measured. Gyroscopes with altimeters are installed at several locations along the length of the cable, and temperatures at various altitudes in the atmosphere are measured using an optical fiber temperature distribution meter measuring device and an altitude calculator connected to the optical fiber on the ground. This is achieved by a temperature measurement method characterized by continuous and simultaneous measurements.

[0007] In the present invention, floating objects in the air include kites, balloons,
Refers to balloons, etc.

[0008] The optical fiber housed in the protective tube in the present invention is intended to prevent the optical fiber from being damaged by airborne objects when lifted into the air, or from being stretched by cables when lifted into the air. Therefore, it is preferable to use a steel wire net or a rubber cover that is flexible and has a certain degree of rigidity to protect it, and to make it sensitive to temperature.

According to the present invention, installing a gyroscope with an altimeter at the end of the optical fiber near an object floating in the air and at several locations along the length of the cable near the altitude to be measured means that the end of the optical fiber is the highest position where airborne objects can be measured, and by installing gyroscopes with altimeters at several locations along the length of the cable corresponding to the desired altitude, the true altitude of each point to be measured can be determined. I can do it. On the other hand, when combined with the measured values of the optical fiber type temperature distribution measuring device, the correct temperature can be correlated to the altitude.

[0010] In the present invention, the optical fiber type temperature distribution measuring device connected to the above-mentioned optical fiber on the ground is an optical fiber type temperature distribution measuring device connected to the optical fiber on the ground, as described in Japanese Patent Application Laid-Open No. 61-270632. , a light source for inputting pulsed light into an optical fiber from its input end, and detecting the intensity of Stokes light and anti-Stokes light due to Raman scattering among the backscattered light of the pulsed light emitted from the input end of the optical fiber. A signal that determines the temperature of the detection system and the optical fiber detected by the detection system, as well as the temperature measurement position of the optical fiber from the time from when the pulsed light is emitted from the light source until the detection system detects the Raman scattered light. An optical fiber type temperature distribution measuring device characterized by comprising a processing circuit. For details, please refer to the above publication.

The altitude calculator according to the present invention is shown in FIG.
To explain using , f and d are determined from the values measured by the altimeter-equipped gyroscope 2 attached to the end of the optical fiber and the altimeter-equipped gyroscope 4 below it, and the measurement points 2 and 4 are Since the distance is known from the beginning by b, the true height of 9 at any point can be found as c as a proportion of the triangle since the length a of the cable is known.

b:d:f=a:c:e As described above, the temperature measuring method of the present invention allows temperature at any height to be continuously measured almost simultaneously.

[0013]

[Example] In FIGS. 1 and 2, when measuring the air temperature in layers, the balloon 1 is raised and a distributed temperature sensor using an optical fiber 3 suspended along a cable 10 is used to measure the air temperature in the height direction. temperature can be measured continuously. Optical fiber is
As shown in FIG. 2, the tube 3 is housed in a protective tube 5 and fixed with a filler 8 so that no tension is applied, and the tube 3 is suspended along the cable. The balloon is blown by the wind,
In order to obtain an accurate height when the vertical position is incorrect, an altimeter and a gyroscope are attached to the optical fiber terminal and the vicinity 4 of the height to be measured. Measure the exact position with position 4,
The vertical dimension d is obtained from the altitude difference, and the horizontal dimension f is obtained from the gyroscope. Since the length b of the optical fiber is known, the exact height c of measurement point 9 is b:d:f
It can be determined by proportional calculation as =a:c:e.

[0014]

[Effects of the Invention] The temperature measurement method of the present invention makes it possible to continuously and simultaneously measure the temperature in the vertical direction of the atmosphere, and to measure the temperature at any altitude simultaneously and continuously without moving the balloon or raising multiple balloons. It can be measured economically, and the method can be simplified.

[Brief explanation of the drawing]

FIG. 1 is a partial side view of an embodiment of the temperature measuring method of the present invention.

FIG. 2 is an explanatory diagram of the state of the optical fiber end in one embodiment of the temperature measuring method of the present invention.

FIG. 3 shows an accurate method for measuring each altitude when the balloon of the present invention is tilted by the wind.

[Explanation of symbols]

1 Balloon 2 Radio transmitter for measurement (gyroscope and altimeter)
3 Optical fiber temperature sensor 4 Gyroscope with altimeter 5 Protective tube 6 Clamp (for hanging) 7 Chain 8 Filler 9 Measuring point 10 Cable

Claims (1)

[Claims] Claim 1: Lay an optical fiber housed in a protective tube along a cable of an airborne object, and connect the end of the optical fiber near the airborne object and the length of the cable near the altitude to be measured. Temperatures at various altitudes in the atmosphere are continuously and simultaneously measured by gyroscopes with altimeters installed at several locations in the horizontal direction, and an optical fiber temperature distribution meter measuring device and an altitude calculator connected to the optical fiber on the ground. A temperature measurement method characterized by: