JPS6366695A - Monitor - Google Patents

Abstract

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

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a device for monitoring the voltage of a solar cell in a large solar array paddle used, for example, in an artificial satellite.

[Conventional technology]

Fig. 10 is a configuration diagram showing a conventional monitor device. (4) is a voltage sensor attached to the surface of the solar battery paddle (3), (5) is a wire connecting the voltage sensor (41) and the slip ring (21).

The conventional monitor device is configured as described above, and the voltage data of the voltage sensor (4) is guided to the slip ring (2) through the wire (5) and enters the inside of the structure (11). Since the paddle (3) rotates while tracking the sun, it is necessary to input the signal through the entire slip ring (2).

[Problem that the invention seeks to solve]

In the conventional monitor device as described above, signals are transmitted through wires (5), so the number of wires (5) increases in proportion to the number of signals.
Not only does the number of wires increase, resulting in an increase in weight, but also the bending moment of the wires (5) increases, which poses a problem of impeding deployment of the solar cell paddle (3). Special ζ
, this problem becomes a major obstacle when increasing the size.

In addition, a slip ring (for use with 21).

Since the number of stages is limited, the number of voltage sensors (4) is also limited, and as the signal increases, the number of slip rings (4) is also limited.
There were problems in that the weight of 21 increased and the design had to be changed.

This invention has been made to solve these problems, and aims to provide a monitor device that transmits voltage sensor signals without using wires. [Means for solving problems] This invention The monitor device includes a voltage sensor disposed on a solar cell nozzle, an optical transmitter and a power generating device, and an optical transmitter/receiver attached to the body.

[Effect]

In this invention, the signal is transmitted by light from the optical transmitter of the voltage sensor and reaches the optical transmitter/receiver, thereby eliminating the need for wires and slip rings and making it possible to acquire a large amount of data at long intervals.

〔Example〕

FIG. 1 is a configuration diagram showing an embodiment of the present invention, FIG. 2 is a configuration diagram of a monitor device, FIG. 3 is a configuration block diagram of the monitor device, FIG. 4 is a circuit diagram of a control circuit, and FIG. is a circuit diagram of the signal processing circuit, Figure 6 is a configuration diagram of the optical transmitter/receiver, Figure 7 is a configuration block diagram of the optical transmitter/receiver, Figure 8 is a circuit diagram of the controller, and Figure 9 is an operation timing diagram. Ah, jl), (11
°+31 and +51 are the same as the above conventional device. In Fig. 1, (6) is a monitor device attached to the surface of the solar array paddle (310), and (7) is an optical transmitting/receiving device attached to the structure (11). In Fig. 2, (9) is a light transmitting lens. It is exposed and installed on the back side of chassis ti4 (7). til is also attached on the back side of chassis I (111
The light receiving lens attached to the αυ is connected to the voltage signal input terminal ■.
3 is a DC/DCC/formula built in chassis I, (
13 is a solar cell attached to the front side of the chassis A4.

In FIG. 3, α9 is an optical filter placed behind the lens (9), and αe is a light receiver placed behind the optical filter OS, which is composed of a light sensor such as a photodiode. a is a control circuit connected to this light receiver ae, (1
♂ is connected to the voltage signal input terminal ■ and the light transmitter rJ9, and is a signal processing circuit built into the chassis I, and α is the LED
It is a light transmitter composed of light emitting elements such as. In FIGS. 4 and 5, +211 is an amplifier that performs signal amplification, filtering, etc., and constitutes a monitor signal processing mechanism. is the address signal output terminal, @ is the power supply terminal connected to the DC/DC converter, R, R+-R+. is resistance,
D+~D4 are diodes, c, c, ~as Fi capacitor*Trt +Tr, are transistors. In FIG.

Q4 is a controller connected to the satellite command signal input terminal (to) and the signal processing circuit ae, and these are connected to the address signal transmitter. FA is a voltage monitor signal output terminal.

In FIG. 8, the configuration of the controller c241 will be explained as follows.
QD is a control circuit connected to the full length command signal input terminal θ, and @ is an analog switch connected to resistor RK.

In the monitor device configured as described above, the observed voltage signal is transmitted to the signal processing circuit (IIHc) in FIG.
When input, in FIG. 5, the level is converted by the amplifier r2xt and the oscillation frequency of the oscillator (c) is set to a value corresponding to the voltage signal. The output of the oscillator (c) is the transistor Tr.
+ Drives the optical transmitter a9, that is, D2, and applies amplitude modulation to the light (8) and sends it out. The above operation is performed by the optical transmitter/receiver (
7), the ON signals B1 to B5 of the DC/DC converter O3 of the monitor device (6) are activated and sequentially turned on to output the potential data signal C1, as shown in FIG. ~C5 will be sent.

The operation of the optical transmitter/receiver (7) will be explained with reference to FIGS. 6, 7, and 8. In Figure 7, when a command signal to start data acquisition is input from the ground to the satellite command signal input terminal (c), the control circuit starts in Figure 8 and sends a switch change signal to the analog switch (branch). . There is a ladder circuit with a resistor R on the input side of the Q analog switches, and a voltage is applied thereto, so that when the switches are switched, a stepped voltage signal appears at the output of the analog switch (C). This stepped voltage signal is input from the address control voltage output terminal (support) to the signal processing circuit αe shown in FIG. Since this signal processing circuit αe is constructed as shown in FIG. 5, the address signal A shown in FIG. 9 is output as a result of V-F conversion.

Next, the address signal A is focused by the light receiving lens αl shown in FIG. 3, and after noise such as background light is cut by the one-light filter QS, it is input to the light receiver σ1 and converted into an electrical signal. In FIG. 4, the amplifier cl! Amplify with +,
After being filtered, diode D3. It is rectified by D4, becomes a direct current, is output from the address signal output terminal, and is input to the DC/DC converter shown in FIG. DC/
The DC converter operates only while the address signal A is present, and supplies power to each circuit section. Therefore, as described in 4 above, the potential data signals C1 to C5 are sent out from the signal processing circuit α.

Next, in FIG. 7, the light receiver lJe
The voltage is input to the voltage monitor signal, converted into an electrical signal, level-adjusted by the amplifier Qυ, and output as observation data from the voltage monitor signal output terminal (to).

〔Effect of the invention〕

As explained above, this invention is achieved by attaching a light transmitting device on a solar battery paddle.

A large amount of comprehensive observation data such as voltage data can be obtained without wires, and the characteristic parameters of the solar array can be monitored without putting any strain on the solar array.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing one embodiment of the present invention. Fig. 2 is a configuration diagram of the monitor device, Fig. 3 is a configuration block diagram of the monitor device, Fig. 4 is a circuit diagram of the control circuit, Fig. 5 is a circuit diagram of the signal processing circuit, and Fig. 6 is a circuit diagram of the optical transceiver device. Diagram,
FIG. 7 is a block diagram of the structure of the optical transmitter/receiver, FIG. 8 is a circuit diagram of the controller, FIG. 9 is a timing chart of operation, and FIG. 10 is a block diagram of a conventional monitor device. In the figure, (1) is the structure, (21 is the slip ring device, (3) is the solar array paddle, (4) is the voltage sensor, (5) is the wire, (6) is the monitor device, and (7) is the optical transmitter/receiver. Equipment, (81Fi light, (91Fi light transmitting lens, neF
i light receiving lens, αJ is signal processor, a3 is DC/DC converter, (13 is solar cell, Q4) is chassis,
(15 is an optical filter, ae is a light receiver, α side is a control circuit, aS is a signal processing circuit, (11 is a light transmitter, a wire is a voltage signal input terminal, c!υ is an amplifier, @ is an address signal output terminal, (to) is the power supply terminal, gO is the controller, (to) is the satellite command signal input terminal, (c) is the voltage monitor signal output terminal, the handle is the control circuit, ■ is the analog switch, and the plane is the address control voltage output terminal. Note that the same reference numerals in each figure indicate the same or equivalent parts.

Claims (1)

[Claims] A DC/DC converter that stabilizes and converts voltage;
A signal processing means that is supplied with power from this DC/DC converter and oscillates a signal with a frequency corresponding to the voltage of the observation signal, a light transmitting means connected to the output end of this signal processing means, and a signal that is modulated by the address signal. 1. A monitor device comprising: a light receiving means for receiving light; and a control means connected to the light receiving means and operating the DC/DC converter only while the address signal is being input.