JPH0649028Y2 - Mixing circuit for radio controlled transmitter - Google Patents

Description

[Detailed Description of the Invention] [Industrial field of application] The present invention relates to a radio control (hereinafter, referred to as a remote control) for remotely controlling industrial equipment such as a crane, a lawn mower, a model of a car, an airplane, a helicopter, etc. The present invention relates to a transmitter, and more particularly to a mixing circuit for a radio control transmitter for mixing a plurality of channel signals.

[Conventional technology]

Conventionally, various mixing circuits have been used to control a plurality of parts of a steered body in an interlocking manner.

FIG. 3 is a block diagram of a conventional radio control transmitter used in a model airplane.

In FIG. 3, 301 to 304 are variable resistors having both ends connected to a power source V and a ground potential, and output control signals for aileron, elevator, throttle, and ladder channels, respectively. The output voltages of the variable resistors 301 to 304 are displaced according to the operation of a stick (not shown). Variable resistor 301
The output signals of -304 are input to buffer amplifiers 305-308, respectively. The output signals of the buffer amplifiers 305 and 307 are input to the multiplexer 314, respectively, and are also input to the adders 312 and 313 via the variable gain amplifiers 309 and 310. The output signals of the buffer amplifiers 306 and 308 are added by the adder 31 respectively.
It is input to the multiplexer 314 via 2, 313. The output signal of the multiplexer 314 is pulse position modulated (PPM) or pulse code modulated (PCM) by the encoder 315, and then amplitude modulated (AM) or frequency modulated (FM) by the high frequency unit 316, and the antenna 317 controls the controlled object. It is transmitted to the receiver installed in. In the radio control transmitter configured as described above, the output signals from the variable gain amplifiers 309 and 310 are cut off when mixing between the channels is not performed. As a result, each channel has a variable resistor 301
~ Independently controlled according to the operation of 304.

That is, control of the aileron and throttle is controlled by the output signals of the buffer amplifiers 305 and 307, respectively.
For the elevator and ladder control, adder 31
Controlled by the output signals of buffer amplifiers 306, 308 via 2, 313.

Next, when performing aileron-to-elevator and throttle-to-ladder hemimixing, the variable gain amplifiers 309 and 310 are set to desired gains. As a result, the output signal of the variable resistor 301 is input to the adder 312 via the buffer amplifier 305 and the variable gain amplifier 309, and is added to the output signal of the buffer amplifier 306. Therefore, it is possible to mix the operation of the aileron with the operation of the elevator. Similarly,
It is also possible to mix the throttle and rudder.

[Problems to be solved by the invention]

As described above, mixing of ailerons to elevators and mixing of throttles to ladders is possible.

By the way, in recent years, various control performances have been required for radio controlled transmitters. For example, regarding the mixing function, various functions such as performing mixing to the throttle via mixing from the aileron to the elevator are required. In the conventional radio-controlled transmitter, only mixing from aileron to elevator or mixing from throttle to rudder is possible, when trying to realize mixing to throttle through mixing of aileron from elevator, Furthermore, mixing from aileron to throttle is required. That is, three mixing circuits are required,
There was a problem that the structure became complicated.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a mixing circuit for a radio control transmitter capable of mixing various channels with a simple configuration.

[Means for solving problems]

The present invention relates to a mixing circuit for a radio control transmitter, which is provided with a plurality of mixing sections for mixing a plurality of channel control signals, and is provided between an output section of the mixing section and an input section of the other mixing section. It is characterized by having a switch part that can be opened and closed.

[Action]

Various mixing is performed by selectively turning on the switch section.

〔Example〕

FIG. 1 is a block diagram showing an embodiment of the present invention.
The number of channels is an arbitrary number according to the type of the operated body, but a block diagram for three channels is shown.

In FIG. 1, 101 to 103 are variable resistors having both ends connected to a power source V and a ground potential, which output control signals for aileron, elevator, and throttle channel, respectively.
The output voltage of each of the variable resistors 101 to 103 changes according to a stitch operation (not shown), and the output voltage of each of the buffer amplifiers 104 to 104 changes.
Input to ~ 106. The output signals of the buffer amplifiers 104 and 105 are input to the adders 107 and 108, respectively, while the adder 11
Input to the multiplexer via 5, 116. Further, the output signal of the mixing unit of the other channel is input to the adder 115. The output signal of the buffer amplifier 106 is input to the multiplexer via the adder 117. In the adder 107,
Output signals of the mixing units of other channels are input via the switch 109. The first output signal of the summing gain amplifier 111 is input to the adder 116, and the second output signal is input to the adder 108 via the switches 113 and 110. The adder 107 and the variable gain amplifier 111 form a mixing unit. The output signal of the adder 108 is input to the variable gain amplifier 112. The first output signal of the variable gain amplifier 112 is input to the adder 117, and the second output signal is input to the input section of the mixing section of another channel via the switch 114 and a switch (not shown). The adder 108 and the variable gain amplifier 112 form a mixing section. The output signals of the adders 115 to 117 are transmitted via the encoder, the high frequency section and the antenna in the same manner as described with reference to FIG.

On the other hand, a setting unit 118 for setting which channel is to be mixed is connected to the switch control unit 119.
The switch control 119 is for controlling the opening / closing of the switches 109, 110, 113, 114 according to the signal from the setting unit 118. The switch control unit 119 also inputs a signal indicating which switch is on or off to the display control unit 120. In response to this, the display unit 121 displays the form as shown in FIG. The operation will be described below.

1 and 2, when the setting unit 118 does not set mixing, the switch control unit 119 turns off the switches 109, 110, 113, and 114. At this time, the switch control unit 119 inputs to the display control unit 120 a signal indicating that all the switches are in the off state. In response to this, the display unit 121 displays English letters and solid line arrows other than the broken line arrows X and Y in FIG. Here, "AIL → E
"LV" indicates that the aileron is mixing to the elevator, and "ELV → THR" indicates that the elevator is mixing to the throttle. In this state, the aileron channel signal, that is, the output signal of the variable resistor 101 is output to the multiplexer via the adder 115, and the first output signal having a magnitude determined by the variable gain amplifier 111 is input to the adder 116. It Therefore, mixing from the aileron to the elevator is performed according to the operation of the variable resistor 101. Similarly, since the first output signal having a magnitude determined by the variable gain amplifier 112 is input to the adder 117, mixing from the elevator to the throttle is performed.

Next, a case where mixing is performed from the aileron to the throttle via the elevator will be described. In this case, the setting unit 118
The switch 11 for mixing the second output signal of the variable gain amplifier 111 to another channel by setting
The switch 3 is turned on, and the switch 110 is turned on so that the signal from the mixing unit of the other channel is input to the adder 108. Correspondingly, a broken line arrow Y indicating that the switch 113 is turned on and a broken line arrow X indicating that the switch 110 is turned on are displayed on the display unit 121. When the switches 113 and 110 are on,
The second output signal of the variable gain amplifier 111 is input to the adder 108, and the first output signal of the variable gain amplifier 112 is input to the adder 117. Therefore, by operating the variable resistor 101, not only the output signal of the adder 116 but also the output signal of the adder 117 can be controlled. That is, it becomes possible to mix the throttle from the aileron through the elevator.

In this embodiment, two switches 110 and 113 are provided between the output section of the mixing section of the aileron channel and the input section of the mixing section of the elevator channel. In the case where the number of channels is increased, parallel mixing may be performed at the same time, such as mixing aileron to elevator and mixing aileron to throttle. In this case, when the aileron is cut off from all channels such as the elevator and throttle, the switch 113 is turned off. When only the aileron and elevator are separated, only the switch 110 has to be turned off. By thus providing the two switches in series, it is possible to easily mix only the desired channel. It should be noted that only one switch is required if the above-mentioned usage is not performed, for example, when the number of channels is small.

〔effect〕

According to the present invention, a variety of mixing operations can be changed with a simple structure and can be used in a radio control transmitter to improve steering performance.

[Brief description of drawings]

FIG. 1 is a block diagram of the present invention, FIG. 2 is a display part of a radio control transmitter using the present invention, and FIG. 3 is a block diagram of a conventional radio control transmitter. 101 to 103, 301 to 304: Variable resistors 104 to 106, 305 to 308: Buffer amplifiers 111, 112, 309 to 311: Variable gain amplifier 118: Setting unit, 119: Switch control unit 120: Display control unit, 121: Display section 315: Encoder, 316: High frequency section 317: Antenna

Claims (1)

[Scope of utility model registration request] 1. A radio control transmitter mixing circuit comprising a plurality of mixing units for mixing a plurality of channel control signals, wherein the mixing unit is provided between an output unit of the mixing unit and an input unit of another mixing unit. A mixing circuit for a radio control transmitter, which is provided with a switch section that can be opened and closed arbitrarily.