JPS61224022A - Three-dimentional coordinate inputting device - Google Patents

Abstract

PURPOSE:To facilitate the inputting of three-dimentional coordinate by finding the distance between a signal source and a receiving device by measuring time lag until arriving at the receiving device of a signal from the signal source sent out by a trigger signal. CONSTITUTION:A trigger signal 500 from the trigger signal transmitting circuit 301 of an arithmetic circuit 300 is detected by the trigger signal detecting circuit 101 of a signal transmitting device 100 and a signal generating circuit 103 is informed of receiving of the signal 500. The signal 500 is generated synchronously with the reset signals of counters 302-304 in the circuit 300. Signals waveform shaped and amplified by an amplifier circuit 102 are received by the circuit 103 and applied to a signal transmitting 104 including information of conduction/non-conduction of switches 105, 106. Signals including switch information are outputted from the circuit 104 as signals 600 for measuring distance and added to signal receiving devices 210-230. Time lag of the signals is measured by counters 302-304 and the distance between the device 100 and devices 210-230 is found by an arithmetic circuit 306.

Description

[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to an information input device for a comviator, and in particular to a device for inputting information to a combiator.
This invention relates to a dimensional coordinate input device.

[Conventional technology]

Most conventional three-dimensional coordinate input devices of this type are based on two-dimensional coordinate input devices. In a two-dimensional coordinate input device, movement in two directions, the X-axis direction and the Y-axis direction, is detected mechanically or optically to obtain plane coordinates. When using this two-dimensional coordinate input device as a three-dimensional input device, you can conveniently convert plane movement in the X and Y axis directions to movement in the Z axis direction by switching the software on the personal computer. I am looking for movement in two axes using a sidecar.

[Problem that the invention seeks to solve]

The conventional three-dimensional coordinate input device described above uses a two-dimensional coordinate input device, so when inputting arbitrary coordinates in three-dimensional space, the Y-axis, Y-axis, and Z-axis cannot be input at the same time, so two steps are required. The disadvantage is that it requires manipulation. Furthermore, since a switch operation is required between the input in the Y-axis and the Y-axis direction and the input in the two-axis direction, the input operation becomes extremely complicated.

SUMMARY OF THE INVENTION An object of the present invention is to provide a three-dimensional coordinate input device that can simultaneously input three-dimensional coordinates to a combinator or the like with simple operations.

[Means for solving problems]

The coordinates of any point in space are unambiguous if the distance from three measurement points that are not on the same straight line is known, and it is limited to only one side of the space divided by the plane containing the three measurement points. However, the present invention applies this principle.

That is, the three-dimensional coordinate input device of the present invention includes a signal transmitting device that transmits a signal in response to a trigger signal from an arithmetic device, and at least three signal receiving devices that receive the transmitted signal. Measure the time from the signal until the signal receiving device receives the signal sent from the signal transmitting device, calculate the distance from the signal transmitting device and each signal receiving device from that time and the signal transmission speed, and calculate the distance between the signal transmitting device and each signal receiving device. By determining the coordinates of the signal transmitting device based on the installation position, it is possible to easily input three-dimensional coordinates.

〔Example〕

Next, the present invention will be explained with reference to the drawings.

FIG. 1 is a configuration diagram of an embodiment of the present invention.

100 is a signal transmitting device having a switch.

210.220.230 is a signal receiving device, 300
connected to the computing device. 400 is a personal computer, and 500 is a trigger signal to the signal oscillation device 100. 600 is a signal for distance measurement, which is triggered by the trigger signal 500 and sent out from the signal transmitting device 100. FIG. 2 is a circuit block diagram of the present invention. FIG. 3 is a timing chart of the signals.

Hereinafter, the present invention will be explained in detail with reference to FIG. The trigger signal detection circuit 101 detects the trigger signal 5oo sent out by the trigger signal sending circuit 301 in the arithmetic device 300, and notifies the signal generation circuit 103 of the reception of the trigger signal 500. The trigger signal 5OO (FIG. 3(a)) is sent to the counters 302, 30 of the arithmetic device 300.
3. The trigger signal output circuit 301 is sent out in synchronization with the reset signal of 304, but the trigger signal detection circuit 1
As an example of the transmission means to 01, a wired electric signal or a wireless infrared signal can be considered. The amplifier circuit 102 shapes and amplifies the output signal of the trigger signal detection circuit 101 and supplies it to the signal generation circuit 103 . The signal generating circuit 103 receives the signal from the amplifier circuit 102 and supplies it to the signal transmitting circuit 104 as a signal containing information on whether the switches 105 and 106 are conductive or non-conductive. switch 10
5.106 functions are defined by software running on the personal combiator 400. The signal generating circuit 104 transmits a signal containing switch information from the signal generating circuit 103 as a distance measurement signal 600 (FIG. 3(b)). Considering the position detection resolution of the distance measurement signal 600, ultrasonic waves can be considered as one means. Figure 3(b)
, the delay t of the distance measurement signal (b) from the trigger signal (FIG. 3(a)). . are the trigger signal transmission delay and the internal circuit operation delay of the signal transmission circuit 100. The signal receiving devices 210, 220° 230 are each a receiving circuit 21
1,221.231 and amplifier circuit 212,222.23
The receiving circuit 211, 221.23 is composed of more than 2.
1 receives the distance measurement signal 600 and amplifies the circuit 212, 22.
2,232. Amplification circuit 212, 222.232
The waveform of the obtained signal is shaped and amplified, and the counter 302
, 303, 304 and the code discrimination circuit 305.

The output signals from the amplifier circuits 212, 222, and 232 are shown in FIG. 3(C).

Shown in (d) and (e). Also, the signal receiving device 210,2
20°230 needs to be installed at a predetermined position because a spatial coordinate system is formed based on the relative position where it is installed. The counters 302, 303 and 304 start counting by a reset signal from the arithmetic circuit 306 synchronized with the trigger signal, and the amplifier circuits 212, 222, 23
Counting continues until the first signal from 2 is input. The values of each counter are shown in Figure 3 (C), (d), (e
) is given by tot, tozetos. If a delay 'DltDil-tDi from the trigger signal 500 is given, each signal receiving device 2 from the signal transmitting device 100
The distance at 10,220.230t can be found using equation (1).

Da-V, (tD,-too) ・・・・・・
...(1) II■1.2.3 However, D11 = Distance from the signal transmitting device to the signal receiving device.

■ = Transmission speed of distance measurement signal in the air.

Also, there is a delay to of the distance measurement signal. is determined in advance based on the circuit configuration, and may be ignored depending on the required detection accuracy. From the above-mentioned communication signal transmitting device 100 to the signal receiving device 2
Once the distance at 10.220.230t is determined, the arithmetic circuit 306 calculates the coordinates of the signal generation device 100 within the spatial coordinate system created by the signal reception devices 210 and 220.230. The code discrimination circuit 305 operates upon receiving a signal from the amplifier circuit 232, but since this signal is given information on the switches 105 and 106 by the above-mentioned pass signal generation circuit 103, the code discrimination circuit 305 operates on the switch 105 and 106. Extract information. The communication circuit 307 uses the coordinate information of the signal generator 100 obtained by the arithmetic circuit 306 and the switches 105 and 106 obtained from the code discrimination circuit 305.
The information is sent to the personal computer in accordance with the established communication procedure.

〔Effect of the invention〕

As explained above, according to the present invention, the distance between the signal source and the receiving device is determined by measuring the time delay between the signal sent by the trigger signal and the signal arriving at the signal receiving device. It is possible to obtain the spatial coordinates of the signal source instantaneously. This eliminates the complexity of input operations associated with conventional three-dimensional input devices of this type, and at the same time, since the movement of the signal source is directly sensitive to human sensation, more advanced applications can be expected.

[Brief explanation of drawings]

FIG. 1 is a block diagram of an embodiment of the present invention. FIG. 2 is a circuit block diagram of an embodiment of the present invention. FIG. 3 is a timing chart of various signals in an embodiment of the present invention, in which <a> is the trigger signal, (b) is the distance measurement signal, and (C) is the output of the amplifier circuit 212. The signal, (d) is the output signal of the amplifier circuit 222, (e) is the output signal of the amplifier circuit 222.
is the output signal of the amplifier circuit 232. 100...Signal transmitting device, 101...
Trigger signal detection circuit, 102...amplification circuit,
103... Signal generation circuit, 104...
Signal transmission circuit, 105゜106... switch,
210,220.230... Signal receiving device, 2
11,221.231... Signal receiving circuit, 21
2.222.232...Amplification circuit, 300...
... Arithmetic circuit, 301 ... Trigger signal sending circuit, 302゜303.304 ... Counter, 305 ... Code discrimination circuit, 306.
... Arithmetic circuit, 307 ... Communication circuit, 4
00...Personal computer, 500...
...Trigger signal, 600...Distance measurement signal.

Claims (1)

[Claims] A signal transmitter that starts transmitting a signal in response to a trigger signal; at least three signal receivers that receive signals from the signal transmitter; and signals from these signal receivers that transmit the signal to the signal transmitter and the respective signals. A three-dimensional coordinate input device comprising: an arithmetic device that calculates the distance to each receiving device and thereby obtains the coordinates of the signal transmitting device.