JPH07284228A - Device for controlling on/off of device mounted on satellite - Google Patents

Abstract

PURPOSE:To prevent command control disabled by interference signals interference signals and mal-functioning of the loaded apparatus by returning the loaded apparatus to the condition before the ON or OFF command signal is inputted after passage of a constant time from the input of an ON or OFF command signal. CONSTITUTION:A controller 12a previously detects the ON/OFF condition of a power supply 13 with an ON/OFF information signal from the power supply 13 and compares this ON/OFF information signal with an ON/OFF control signal from a command receiving circuit 11. This ON or OFF control signal is outputted from the power supply 13 to set the loaded apparatus 10 to the ON or OFF condition. In this case, the controller 12a outputs a timing signal to a timer 12b. After the predetermined time has passed, the controller 12a to which the timing signal is inputted from the timer 12b outputs an OFF/ON reset signal to the power supply 13. Therefore, the power supply 13 returns to the condition before the ON/OFF control signal is inputted.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention surely prevents command control failure and malfunction of on-board equipment due to signal interference in ground station inter-satellite communication, inter-satellite communication and intra-satellite group communication using the same frequency. The present invention relates to an ON / OFF control device for an artificial satellite-equipped device that can be easily prevented from being turned on and off in a ground station of various devices such as an imaging device and a heater mounted on the artificial satellite.

[0002]

2. Description of the Related Art Artificial satellites are equipped with various equipments, and these equipments are installed by inputting ON / OFF command signals from a ground station to a command receiver or command decoder on the artificial satellite side. , Was ON / OFF controlled.

For example, an earth observation device mounted on an artificial satellite is turned on when approaching an observation point in order to reduce power consumption and prevent unnecessary radio waves from being emitted to the ground.
The state was set to OFF, and when it was far from the observation point, it was set to the OFF state. Further, the heater mounted on the artificial satellite is in the ON state when the sun's light does not hit the artificial satellite at all due to the earth eclipse, and is in the OFF state after the earth eclipse is eliminated.

[0004]

However, in recent years, inter-artificial satellite communication for exchanging command signals or data signals among a plurality of independent artificial satellites, and a master artificial satellite as a core and a plurality of slaves surrounding it. Communication within an artificial satellite group in an artificial satellite group formed by artificial satellites, or communication between an artificial satellite and a space station is actually being performed. Here, while each of the artificial satellites and space stations in the above-mentioned artificial satellite group is equipped with a large number of communication devices related to ON / OFF command signals, a frequency that can be used as an ON / OFF command signal. Is restricted by the Radio Law, the frequencies of ON / OFF command signals may overlap with each other between artificial satellites or between artificial satellites and space stations.

In such a case, in the conventional artificial satellite command receiver, it is always possible to receive the ON / OFF command signal, that is, the receiver is always in the ON state. An unrelated signal transmitted from a satellite, etc. or a signal transmitted by itself to another artificial satellite etc. is mistakenly input to its own command receiver, the command receiver is interfered, command control becomes impossible, or There is a problem that the onboard equipment malfunctions.

Here, in order to solve the above problem, the artificial satellite is provided with a switch for turning on / off the command receiver, and when the ON / OFF command signal is not input, the command receiver is turned off and an erroneous ON is performed. It is possible to prevent the / OFF command signal from being input. However, simply providing a switch that turns the command receiver on and off will turn this switch off once.
When the state is set, it is not automatically turned on thereafter, and there is a problem that communication to the artificial satellite is completely disabled unless a command to turn on the switch is output from the ground.

In Japanese Patent Laid-Open No. 4-7183, a timer counts for a certain period of time based on the fact that the size of the set paper does not match the size of the paper specified by the host computer, and the paper is set within a predetermined time. A printing apparatus has been proposed which prints on the set paper when the printing is not performed again. Also, the actual Kaihei 3-94039
In the No. issue, the timer counts for a certain period of time based on the OFF control, and then the buzzer sounds and the OF
There has been proposed an erroneous operation prevention system that notifies that F control has been performed.

However, these printing devices and erroneous operation prevention systems only operate the printing device or the buzzer after a certain period of time by the timer, and the input O
It is not possible to control ON / OFF of one or a plurality of mounted devices corresponding to the N / OFF command signal.

In addition, when the conventional equipment mounted on the artificial satellite is turned on / off,
The OFF control was performed by the worker of the ground station outputting an ON / OFF command signal, so that the worker always keeps the artificial satellite until the artificial satellite reaches the point where the onboard equipment is turned on or off. There was a problem that we had to search and the work efficiency was poor. Further, in the above ON / OFF control, the ground station turns on or off.
Since it is necessary to output two FF command signals, it is troublesome to operate and there is a risk of erroneous operation.

The present invention has been made in view of the above problems, and in ground station inter-satellite communication, inter-satellite communication and intra-satellite group communication using the same frequency,
It is possible to reliably prevent command control failure and malfunction of on-board equipment due to signal interference, and to easily turn on / off various equipment installed on the artificial satellite at the ground station. ON / OF of equipment
It is intended to provide an F control device.

[0011]

In order to achieve the above-mentioned object, the ON / OF of the equipment mounted on the artificial satellite according to claim 1 of the present invention.
The F control device is connected to the power supply of the equipment mounted on the artificial satellite, starts counting when an ON or OFF command signal is input, and turns OFF to the power supply after a lapse of a certain time.
Or, output an ON return signal to turn on the above-mentioned equipment
Alternatively, the configuration is such that the state before the OFF command signal is input is restored.

According to a second aspect of the present invention, an ON / OFF control device for a device mounted on an artificial satellite is connected to a power source of the device mounted on the satellite and outputs an ON or OFF control signal when an ON or OFF command signal is input. When the timer operation signal is output to the timer unit while the time signal is input from the timer unit as well as being output to the power source, an O signal is output to the power source.
A control unit that outputs an FF or ON return signal, and a timer unit that starts counting when a timer operation signal is input from the control unit and outputs the elapsed time signal to the control unit after a lapse of a certain time I am doing it.

Further, in the ON / OFF control device for an artificial satellite-equipped device according to claim 3 of the present invention, the control section inputs the ON or OFF command signal and the power ON / O.
It has a function of comparing FF states, and when an ON command signal is input while the power source is in the ON state, it does not output an OFF recovery signal to the power source, and the power source is OFF.
When the OFF command signal is input in the state,
The configuration is such that an ON return signal is not output to the power source.

According to a fourth aspect of the present invention, in the ON / OFF control device for a device mounted on an artificial satellite, the control section is connected between a command receiving circuit of the device mounted on the device and a power supply. O of the equipment equipped with the artificial satellite in item 5 or 6
The N / OFF control device is configured to use a command decoder or a control unit of an on-board computer as the control unit.

[0015]

According to the ON / OFF control device for the equipment mounted on the artificial satellite according to the present invention, which has the above-mentioned structure,
When the N / OFF control device is installed in the command receiver, the command receiver is turned off when not needed during ground station inter-satellite communication, inter-satellite communication or intra-satellite group communication using the same frequency. Therefore, it is possible to prevent the command control from being disabled and the on-board equipment from malfunctioning due to the interference of the command receiver. In addition, if this ON / OFF control device is installed in various devices such as an image pickup device and a heater, the onboard device automatically turns off the original OFF or OFF after a predetermined time by outputting the ON or OFF command signal only once from the ground station. Return to the ON state.

Further, according to the ON / OFF control device for the equipment mounted on the artificial satellite of the present invention having the above-mentioned structure, the ON command signal is sent when the equipment mounted is in the ON state, or the equipment mounted on the equipment is in the OFF state. At this time, even if the OFF command signal is output, the control unit does not output any return signal. As a result, even if the on-board device is in the ON state and the ON command signal is output by an erroneous operation, the on-board device does not turn off after a predetermined time contrary to the operator's intention.

Further, according to the ON / OFF control device for the artificial satellite mounted equipment of the present invention having the above-mentioned structure, the mounted equipment is individually turned on by directly connecting the control section to the mounted equipment. / OFF can be controlled. Further, according to the ON / OFF control device for an artificial satellite-mounted device of the present invention according to claim 5 or 6, by using a command decoder or a control unit of an on-board computer as the control unit, one ON / OFF The OFF control device can collectively control a plurality of mounted devices.

[0018]

[Embodiment] The ON / O of the satellite-equipped device of the present invention will be described below.
An embodiment of the FF control device will be described with reference to the drawings. First, an ON / OFF control device for an artificial satellite-mounted device according to the first embodiment of the present invention will be described. FIG. 1 is a block diagram showing an ON / OFF control device for an artificial satellite-mounted device according to this embodiment. In this embodiment, the ON / OFF control device is directly provided on the satellite-mounted device.

In the figure, reference numeral 10 is an earth observation equipment, equipment such as a heater mounted on an artificial satellite. Reference numeral 11 denotes a command receiving circuit, which is an on / off command signal S for on-board equipment from a command decoder, on-board computer (OBC) or remote interface unit (RIU).
Input ₇ and output ON / OFF control signal S ₈ .

Reference numeral 12 is an ON / OFF control device, which comprises a control unit 12a and a timer unit 12b. The control unit 12a
The ON / OFF state of the power supply 13 is detected in advance by the ON / OFF information signal S ₉ from the power supply 13, and this ON
/ OFF information signal S ₉ and O from the command receiving circuit 11
The N / OFF control signal S ₈ is compared. And the power supply 13
When the OFF control signal S ₈ is input in the ON state, or when the ON control signal S ₈ is input in the OFF state of the power supply 13, the ON or OFF control signal S ₈ is output to the power supply 13. , The on-board device 10 is turned on or off. At this time, the control unit 12a causes the timer unit 12 to
The timing signal S ₁₀ as a timer operating signal is output to b.

The timer unit 12b, which receives the timing signal S ₁₀ from the control unit 12a, starts counting and outputs the timing signal S ₁₁ as a time-lapse signal to the control unit 12a after a predetermined time has elapsed. . The control unit 1 to which the timing signal S ₁₁ from the timer unit 12b is input
2a is ON / input input from the command receiving circuit 11.
OFF / ON return signal S ₁₂ opposite to OFF control signal S ₈
Is output to the power supply 13. As a result, the power supply 13 returns to the OFF or ON state before the ON / OFF control signal S ₈ was input.

In this embodiment, when the power supply 13 is in the ON state and the ON control signal S ₈ is erroneously input, or when the power supply 13 is in the OFF state, the OF is turned off.
When the F control signal S ₈ is erroneously input, the control section 12a is not operated by a logic circuit (not shown). In such a case, when the controller 12a is operated, the OFF / ON return signal S
_{This is because 13} is output and the mounted device 10 malfunctions.

According to the ON / OFF control device for the artificial satellite-equipped device of the present embodiment having the above-mentioned configuration, the ON / OFF control is performed.
When the control device 12 is provided in the command receiver, the command receiver is used when a transmitter outputs a signal to another artificial satellite in ground station inter-satellite communication, inter-satellite communication and intra-satellite group communication. Can be kept in the OFF state, and it is possible to prevent the command control from being disabled and the on-board device 10 from malfunctioning due to signal interference.

Further, since the control unit 12a compares the ON / OFF control signal S ₈ with the ON / OFF state of the power source 13 and is configured not to operate with an incorrect ON / OFF control signal S ₈ , an operation error may occur. It is also possible to prevent malfunction of the mounted device 10. In particular, as described above, this ON / OF
When the F control device 10 is directly provided in the command receiver, it is possible to avoid a fatal state in which the command receiver is turned off by the input of an erroneous ON control signal S ₈ and the command control is disabled.

Further, the ground station turns ON or OF only once.
By outputting the F command signal, the mounted device 10 can be automatically returned to the original OFF or ON state after a lapse of a predetermined time. This simplifies the operation of the onboard equipment 10 in the ground station and also facilitates the search for artificial satellites.

Next, turn on / off the equipment mounted on the artificial satellite of the present invention.
A second embodiment of the OFF control device will be described with reference to FIG. FIG. 2 shows that the equipment mounted on the artificial satellite of this embodiment is turned on.
It is a block diagram which shows a / OFF control apparatus. In this embodiment, an ON / OFF control device is formed by providing a timer part in the control part of the command decoder or on-board computer, and a plurality of artificial satellite mounted devices connected to the downstream side of this command decoder are integrated. ON / OFF control is performed.

In the figure, reference numeral 20 is a command decoder (or on-board computer), and an ON / OFF command signal S ₁ from the ground station is input to the demodulator 21. The demodulation unit 21 demodulates the ON / OFF command signal from the ground station and outputs it to the decoding unit 22. Decoding unit 22
Inputs the demodulated ON / OFF command signal S ₂ , decodes it, and then outputs it to the control unit 23a.

The control unit 23a controls the decrypted ON / OFF.
The command signal S ₃ is input and output to the command output circuit 24. As a result, the command output circuit 24 outputs the onboard device ON / OFF command signal S ₇ to the predetermined onboard device, and turns on or off the onboard device. In addition, the control unit 23a turns OFF / OFF corresponding to the ON / OFF command signal S ₃ of each of a plurality of mounted devices (not shown).
The configuration is such that the ON recovery control signal S ₆ is output. That is, the control unit 23a, when inputting the ON / OFF command signal S _3, the ON / OFF command signal S
The type of ₃ is discriminated, and a ready state for outputting the corresponding OFF / ON return control signal S ₆ is set. Furthermore, the control unit 23a
Outputs the timing signal S ₄ when the ON / OFF command signal S ₃ is input.

The timer unit 23b starts counting by inputting a timing signal S ₄ from the controller 23a, after a predetermined time has elapsed, it outputs the timing signal S _5. Then, the control unit 23a, which has received the timing signal S ₅ , inputs the OFF / ON return control signal S ₆ to the command output circuit 24.
Is output. As a result, the command output circuit 24 outputs the onboard device OFF / ON command signal S ₇ opposite to the onboard device ON / OFF command signal S ₇ output last time to the predetermined onboard device, and the predetermined onboard device Station ON
Return to the OFF or ON state before the / OFF command signal S ₁ is input.

The ON / OFF control apparatus for the artificial satellite-equipped device of this embodiment having such a configuration has a configuration in which the control unit 23a of the command decoder (or on-board computer) is provided with the timer unit 23b. ON of the stand
The / OFF control device 23 can collectively control a plurality of mounted devices.

It should be noted that the artificial satellite-equipped device of the present invention is turned on / off.
The OFF control device is not limited to the above embodiment. For example, the configuration of the ON / OFF control devices 12 and 23 is the same as the control units 12a and 23a and the timer units 12b and 2 described above.
The present invention is not limited to 3b, but can be changed to a combination of a digital signal logic circuit and a counter circuit that have been conventionally used. Further, the configuration for preventing malfunction by the input of the incorrect ON / OFF control signal S ₈ in the first embodiment may be applied to the ON / OFF control device 23 in the second embodiment. However, when the earth station takes a measure to prevent an erroneous operation, the above-mentioned configuration for preventing an erroneous operation can be deleted from the ON / OFF control device.

[0032]

As described above, according to the ON / OFF control device for the equipment mounted on the artificial satellite of the present invention, the ground station artificial satellite communication, the artificial satellite communication and the artificial satellite group which use the same frequency In communication, it is possible to reliably prevent inability to control commands and malfunction of on-board equipment due to signal interference, and to turn ON / OFF operations of various equipment such as imaging devices and heaters mounted on artificial satellites at ground stations. It can be done easily.

[Brief description of drawings]

FIG. 1 is a diagram illustrating an example of turning on the satellite-mounted device according to the first embodiment of the present invention.
It is a block diagram which shows a / OFF control apparatus.

FIG. 2 is a diagram illustrating a state in which the satellite-mounted device according to the second embodiment of the present invention is turned on.
It is a block diagram which shows a / OFF control apparatus.

[Explanation of symbols]

10 Satellite-equipped equipment 11 Command receiving circuit 12 ON / OFF control device 12a Control unit 12b Timer unit 13 Power supply 20 Command decoder (on-board computer) 21 Demodulation unit 22 Decoding unit 23 ON / OFF control device 23a Control unit 23b Timer unit 24 Command output circuit S ₁ Ground station ON / OFF command signal S ₂ Demodulated ON / OFF command signal S ₃ Decoded ON / OFF command signal S ₄ , S ₅ Timing signal S ₆ OFF / ON return control signal S ₇ Equipment ON / OFF command signal S ₈ ON / OFF control signal S ₉ ON / OFF information signal S ₁₀ , S ₁₁ timing signal S ₁₂ OFF / ON return signal

Claims (6)

[Claims] 1. Connected to a power source of equipment mounted on an artificial satellite, start counting when an ON or OFF command signal is input, and turn off the power source after a lapse of a certain time.
Or, output an ON return signal to turn on the above-mentioned equipment
Alternatively, an ON / OFF control device for an artificial satellite-equipped device, which returns to a state before an OFF command signal is input. 2. When connected to a power source of the on-board equipment and an ON or OFF command signal is input, ON or OF
A control unit that outputs an F control signal to the power source, outputs a timer operating signal to the timer unit, and outputs an OFF or ON return signal to the power source when a time-lapse signal is input from the timer unit; 2. A timer unit that starts counting when a timer operating signal is input from the control unit and outputs the elapsed time signal to the control unit after a lapse of a certain time.
An ON / OFF control device for the equipment mounted on the artificial satellite described. 3. The input ON or OF by the control unit
A function of comparing the F command signal with the ON / OFF state of the power source is provided, and when the ON command signal is input while the power source is in the ON state, the OFF return signal is not output to the power source, and OF when the power is off
3. The ON / OFF control device for an artificial satellite-equipped device according to claim 1, wherein an ON return signal is not output to the power source when an F command signal is input. 4. The ON / OFF control device for an artificial satellite mounted device according to claim 1, wherein the control unit is connected between a command receiving circuit of the mounted device and a power supply. 5. The ON / OFF control device for an artificial satellite-mounted device according to claim 1, wherein a control unit of a command decoder is used as the control unit. 6. The ON / OFF control device for a device mounted on an artificial satellite according to claim 1, wherein a control unit of an onboard computer is used as the control unit.