JPS61114138A - Atmospheric pressure transducing device - Google Patents

Abstract

PURPOSE:To perform telemetering by arranging a parallel light source and photodetecting elements of plural lights in opposition at a mercurial column measurement part and transducing a height of a mercurial column of atmospheric pressure measuring instrument into an electrical signal. CONSTITUTION:Outgoing light from a fluorescent lamp 11 irradiates the mercurial column 2 of the atmospheric pressure measuring instrument and the transmitted light is made incidence on a part of the plural photodetecting elements 13. Its output is transduced into the electrical signal by a signal converter 14 and outputted from an output terminal 16 via wiring 15 for measurement output. Hereby, the height of the mercurial column 2 is transduced into the electrical signal.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an improvement in a mercury column height conversion mechanism of a Fortan-type barometric pressure measurement device.

[Conventional technology]

FIG. 6 is a front view of a conventional 7-orthane pressure measuring device (described, for example, on page 288 of the Modern Encyclopedia published by Yokyusha), and FIG. 4 is a detailed view of its main parts.

In the figure (1) is a glass tube that moves the mercury column (2) up and down, (3
) is the measurement part, (4) is the vernier for measurement, (5) is the ivory needle for adjusting the mercury level, (6) is the mercury reservoir, (7) is the screw for adjusting the mercury level, (8) is the attached Ji4 It's a thermometer.

As shown in the figure, a glass tube (1) filled with mercury is placed upside down in a mercury reservoir (6) at the bottom, and the mercury level in the mercury reservoir (6) rises and falls depending on the atmospheric pressure. Therefore, when measuring atmospheric pressure, the height of the mercury column (2) at the measurement part is precisely read using a vernier scale (4), and this value is subjected to temperature correction, gravity correction (latitude correction), and altitude conversion calculation. It is calculated in millibar units.

[Problem that the invention seeks to solve]

Conventional barometric pressure measuring devices are configured as described above, so when measuring barometric pressure, after reading the value of the mercury column (2), it is necessary to perform correction calculations and conversion calculations on that value.
The drawbacks were that the readings could not be used directly and that remote measurements could not be performed.

The present invention was made in order to eliminate the drawbacks of conventional devices, and aims to provide a barometric pressure converting device that converts the height of the mercury column of a barometric pressure measuring device into an electrical signal and can be remotely measured. It is.

[Means and effects for solving the problem] In order to convert the height of the mercury column, which was conventionally read visually, into an electrical signal, a scale plate or a vernier is used in the mercury column measuring part of the barometric pressure measuring device. Instead, it was equipped with a fluorescent lamp and a light-receiving element, and by projecting the light from the fluorescent lamp through a glass tube containing a column of mercury onto the light-receiving element, and converting the output from the light-receiving element, it was possible to measure the atmospheric pressure. did. Furthermore, by extending the wiring, measured values can be obtained even if the barometric pressure measuring device is located at a remote location.

[Embodiments of the invention]

FIG. 1 is a front view of the main parts of a barometric pressure measuring device showing an embodiment of the present invention, and FIG. 2 is a cross-sectional view taken along the line AA.

In the figure, (1) is a glass tube containing a column of mercury (2), 01 is a frame for holding a 0υ fluorescent lamp, α2 is a reflector, 04 is a light receiving element, and a is the electrical pressure that is converted from the output of the light receiving element. 09 is a measurement output wiring, aO is an output terminal and a power supply terminal, and αη is a barrier.

In the figure, the light emitted from the fluorescent lamp at+ as the light source is
The light passes through the glass tube (1) containing the mercury column (2) and is irradiated onto the light receiving element Q. At this time, the output of the light receiving element that receives the light transmitted through the glass tube (1) without the mercury column (2) and the light receiving element of the part of the mercury column (2) that does not transmit light is different, and this output is transmitted to the signal converter. 04), it is converted into an electrical signal and output from the output terminal aI via the wiring 09. The light receiving element 0■ has a paris γ so that the light is guided at each gap.
αη may be arranged.

In the above embodiment, the light receiving element and the signal converter ([4]
Although both are provided in the barometric pressure measuring device, the signal converter 04 may be placed separately. Alternatively, a temperature sensor may be provided separately, and its output may be inputted to simultaneously perform temperature correction on the output from the air pressure conversion device.

Similarly, gravity correction, altitude conversion, etc. can be performed at the same time.

〔Effect of the invention〕

According to the present invention, the barometric pressure measuring device is equipped with a light source, a light receiving element, a signal converter, etc., and is configured to be able to convert the height of the mercury column into an electric signal and output it, so that the barometric pressure measuring device can be read visually. It is now possible to measure atmospheric pressure from a remote location without having to do so.

Furthermore, by adding a processing device for performing correction calculations on the atmospheric pressure measurement value such as temperature correction, gravity correction, or altitude conversion, the corrected atmospheric pressure can be measured remotely.

[Brief explanation of drawings]

FIG. 1 is a front view of a main part of an air pressure measuring device showing an embodiment of the present invention, and FIG. 2 is a sectional view thereof. Further, FIG. 3 is a front view of the conventional device, and FIG. 4 is a detailed view of its main parts. In the figure, (1) is a glass tube, (2) is a mercury column, a is a fluorescent lamp, 0υ fluorescent lamp, a is a reflector, (1 is a light receiving element, 0 is a signal converter, and a is a measurement output. Wiring, α0 output terminal, α
η is a barrier. Note that the same reference numerals in the figures indicate the same or equivalent parts. Agent Patent Attorney Sanro Kimura Figure 1 Figure 2 Figure 3 Figure 1N Kaisho 6l-114138 (3) Figure 4

Claims (2)

[Claims] (1) In the barometric pressure measurement device, the mercury column measuring section is equipped with a parallel light source, a single or multiple light receiving element, and a signal converter, and is configured to convert the height of the mercury column into an electrical signal. An atmospheric pressure conversion device featuring: (2) The barometric pressure converting device according to claim 1, wherein the barometric pressure converting device is further provided with a temperature sensor and an arithmetic unit so as to be able to perform temperature correction of the barometric pressure.