JPS58192199A - Remote monitor for measurement data - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a metric data remote monitoring device that reads and monitors metric data indicated by a meter from a distance.

Conventionally, in order to read a meter, a meter reader needs to go near the meter and read the scale, but there are various disadvantages such as the distance to the meter is long or the meter reading location is dangerous. It is conditional and inefficient.

In addition, some technologies, such as telemeter links, which convert data into electrical signals and transmit them, have been effectively used, or the equipment used for implementation is complex. It is not suitable for reading a large number of meters.

The present invention has been made in view of the above circumstances, and its purpose is to provide a metric data remote monitoring device that can read and monitor meter data indicated by meters with a relatively simple configuration from a distance. .

To this end, the present invention irradiates a directional light beam toward the instrument from a beam generating means that is fixed or movably provided at an arbitrary position away from the instrument, while
This light beam is modulated according to the meter data by a light modulation means provided in connection with the meter, and is reflected in the direction from which it has entered by a reflection means provided in connection with the meter, and further The light beam that has been reflected and returned after receiving this modulation is received by a receiving means provided in association with the light beam generating means, and the signal obtained based thereon is identified by an identifying means. .

Hereinafter, the measurement data remote monitoring device (hereinafter referred to as
1) will be described with reference to the drawings.

FIG. 111 is a diagram illustrating the principle of the apparatus of the present invention.

In the figure, 1 is a car that moves freely on a road 2,
The automobile 1 includes a laser beam generating means 3 for generating a directional laser beam, and a receiving means 4 for receiving the laser beam returned from the meter 6 as described later.
and identification means 5 for identifying the output signal from the receiving means 6.

On the other hand, in connection with a meter 6 such as an integrating wattmeter, there is a reflecting means 7 that reflects an incident laser beam in one direction, and an optical modulator that modulates the incident laser beam based on the measurement data of the meter 6. means 8 are provided.

Thus, the laser beam 9A irradiated from the laser beam generating means 3 toward the instrument 6 is reflected by the reflecting means 7 in the direction of incidence, and the light modulating means 8
is modulated based on the metrological data. The laser beam 9B modulated in this way and returned to the car 1
The signal is received by the receiving means 4 mounted on the . The output signal of the receiving means 4 is then given to the identifying means 5, which identifies it and displays, for example, the device data of the meter 6 on a display (not shown).

Next, the configuration of an embodiment of the apparatus of the present invention will be explained in more detail.

First, to easily explain the principle of the light modulation method in this embodiment to facilitate understanding of the configuration, the light modulation method in this embodiment changes the rotation angle of the polarization plane of incident linearly polarized light based on a modulation signal. By changing this, the incident light is modulated.

FIG. 2 schematically shows a specific example of the laser beam generating means and receiving means. In the figure, reference numeral 31 denotes a laser beam generator that generates a directional, linearly polarized laser beam, and a solar cell 41, for example, for detecting the incident laser beam is provided in front of it.

A hole 42 is provided in the center of the solar cell 41 through which the laser beam emitted from the laser beam generator 31 passes. Further, it is desirable to provide a polarizer 32 on the positive side of the hole 42 in order to align the plane of polarization of the laser beam emitted from the laser beam generator 31. On the other hand, a polarizer 43 is provided in front of the solar cell 41 for detecting the rotation angle of the polarization plane of the laser beam 9B that is modulated by the modulation means 8 provided in association with the instrument 6 and returned.

FIG. 3 is an illustrative view of a reflection/modulator 10 provided with a reflection means 7 and a modulation means 8 provided in connection with the instrument 6, and FIG. 3A is a perspective view of the reflection means 7 and modulation means 8; Same figure (
b) is its block diagram.

In the same figure (a), 11 is a coil 12 wound around.
The core has a CJ shape, and a corner cube 14 made of a Faraday effect element such as lead glass is interposed in the gap 13 of the core 11 with its bottom facing outward. The corner cube I4 is a triangular pyramid-shaped prism that reflects light incident on its bottom surface in the direction of incidence.Furthermore, the Faraday effect element that constitutes the corner cube 14 is activated when a magnetic field is applied to it. It has the property of rotating the optical plane of linearly polarized light depending on the strength of the magnetic field when linear light is incident on it.

On the other hand, as shown in the same figure (b), the needle amount data of gauge 6 is ^
/1) The signal is applied to the converter 16, where it is converted into a pulse signal having levels rHJ and rLJ as shown in FIG. Therefore, the A/D converter 16 is included in the modulation means.

FIG. 4 is a block diagram showing the relationship between the receiving means provided in association with the light beam generating means and the identifying means for identifying the output signal thereof. In the figure, an output signal from a solar cell 41 serving as a receiving means is amplified by an amplifier 17 and given to a discriminator 18 serving as a discriminating means. The identifier 18 reads the output signal of the solar cell 41, identifies it, and displays the output signal, for example, on the display 19.
to display the results.

Next, with reference to FIGS. 1 to 4, the operation of an embodiment of the apparatus of the present invention having the above-described configuration will be described.

First, the laser beam emitted from the laser beam generator 31 has its polarization plane aligned by the polarizer 32 and is irradiated onto the instrument 6 as a laser beam 9A.

- force, the needle amount data of the meter 6 is A/4) The coil 1 of the reflection/modulator 10 is transmitted as a pulse signal through the converter 16.
2 are given consecutively. As a result, the strength of the magnetic field generated in the coil 12 changes based on the change in the current flowing through the coil 12. Reflexion/tsbi in such a state
] When the laser beam 9A is incident on the corner cube 14 of o, the laser beam 9A is reflected in the direction of incidence, and the rotation angle of the polarized light or the level of the pulse signal given to the coil 12 [H ball rLJ Correspondingly, it undergoes a change, for example, θlζθL. Therefore, the laser beam 9A is reflected in the direction of incidence as a laser beam 9L modulated by needle amount data of the meter 6.

The laser beam 9B is a laser beam generated W3.
1 is incident on a polarizer 43 provided in connection with 1. Here, if the photon 43 is set to pass when the rotation angle of the polarization plane of the incident light is 9, the laser beam that has passed through the polarizer 43 will have a light intensity corresponding to the pulse signal 1. I will have it. As a result, the solar cell 41 that receives the laser beam that has passed through the -photon 43 outputs a signal corresponding to the light intensity of the incident laser beam. This output signal is then amplified by an amplifier 17 and given to a discriminator 18.

The identifier 18 identifies the signal from the solar cell 41 and provides the result to the display 19, for example. Therefore, indicator 19
displays the needle amount data of the meter 6.

In the embodiment, the Faraday effect is used as a means for modulating the laser beam, but the present invention is not limited to this, and other light modulating means may be used.

For example, in FIG. 5, the reflected L/-
FIG. 2 is an illustrative diagram of a means for adjusting wheat by intermittently shielding Sahi-A. That is, in the figure, 20 is a half-mirror i, and this half-mirror allows the incident laser beam 9A to pass through, but does not allow the laser beam reflected back from the corner cow up n, which will be described later, to pass through.

Further, 21 is a reflecting mirror that further reflects the laser beam reflected by the half mirror 2o in the direction in which the laser beam 9A is incident. Furthermore, 22 is a so-called normal corner cube, which reflects the incident laser beam in the direction of the incident laser beam. The blade is a disc in which a predetermined number of long holes 24 are opened in the radial direction, and this disc is rotated by a motor (not shown). Therefore, by rotating the disc 23 at a speed corresponding to the meter 5 & gil- data and intermittently shielding the laser beam reflected by the corner cube 22 etc. by about 6 times, the incident laser beam is changed according to the itm data. - I can do something. In this case, a solar type is used to receive the modified laser beam 9c! #141 alone is sufficient and the polarizing plate 43 is not necessary. It will also be clear that the polarizing plate 32 is also not required.

Further, in the description of the embodiment, it has been explained that a laser beam is irradiated, but this may also be an optical beam such as 1) optical beam.

As is clear from the above description of the embodiments of the device of the present invention, the device for monitoring metric data from a distance according to the present invention allows the metric data indicated by the meter to be read and viewed from a distance with a relatively simple configuration. Therefore, it has extremely high HJ properties in practical use.

[Brief explanation of the drawing]

FIG. 1 is a schematic diagram showing the principle of the apparatus of the present invention, FIG. 2 is a schematic diagram of a specific example of the laser beam generating means and receiving means, and FIG. and odd-
FIG. 4 is a block diagram showing the relationship between the receiving means provided in connection with the light beam generating means and the identifying means for identifying the output signal thereof;
FIG. 5 is an illustrative diagram of a means for modulating a reflected laser beam by intermittently shielding it as a light modulating means. 3... Laser beam generating means, 4... Receiving means, 5
... Identification means, 6 ... Instrument, 7 ... Reflection means, 8
...Light modulation means, 10... Reflection/modulator, 14...
- Corner loop, 18... Discriminator, 31... Laser beam generator, 32, 43... Polarizer, 41...
solar cells. Patent applicant Hitachi Kiden Kogyo Co., Ltd. Yagi Antenna Co., Ltd. Toshihiro Tsumura Figure 2 Figure 31'A (r> 5 (11) (c) Figure 4 Figure 51'4 2

Claims (1)

[Claims] (1) A light beam generating means that is fixed or movably provided at any position away from the instrument and generates a directional light beam, and a light beam generating means that is provided in relation to the instrument and that generates a directional light beam. a light modulation means that modulates the emitted light beam with measurement data, and a reflection means that is provided in association with the instrument and reflects the light beam emitted from the front light distribution beam generation means toward the direction in which it is incident. and a receiving means provided in association with the light beam generating means, for receiving the light beam modulated by the front light distribution modulating means and reflected by the reflecting means, and receiving the light beam outputted from the receiving means. 1. A remote monitoring device for instrument data, comprising identification means for identifying signals based on The f21 6iJ optical change means and the reflection means apply a magnetic field whose intensity is changed in accordance with the instrument data of the instrument to a corner cube made of a Faraday effect element, and convert the linearly polarized light incident on the corner cube into a magnetic field. Distant monitoring of weighing data according to claim 1, characterized in that the incident light is reflected in the direction of the needle lid and modulated by the needle lid data by changing the rotation angle of the light surface. Device.