JPS60111967A - Wind-direction converting apparatus - Google Patents

Abstract

PURPOSE:To make it possible to take out data with high accuracy by averaging the angle of an anemoscope with high accuracy, by using a shaft encoder in a wind-direction sensing part. CONSTITUTION:A shaft encoder 200 as a wind-direction sensing part is connected to an anemoscope 1 and has a rotor 201 rotating between LEDs 2-2-1-2-3-5 opposed thereto. In this case, the angle signal from the anemoscope 1 is inputted to CPU33 through an input gate 31 and a peripheral parallel interface 32 and stored in RAM36 as processing data before processing. Necessary data is displayed and outputted from a display circuit 40 corresponding to the signal input from an operation circuit 41 and data output for printing is taken out from a communication device 38 while remote transmitting output is obtained from a communication device 39 through MODEM43.

Description

[Detailed Description of the Invention] [Technical Field of the Invention] This invention uses wind direction data, which is one of the meteorological observation elements, to
This relates to a wind direction conversion function for obtaining data obtained by digitally converting the angle of a wind vane.

[Prior art]

Conventionally, there has been a wind direction changing device of this type as shown in FIG. In the figure, l is a windmill-type wind window 1, 2 is a synchro transmitter which is a wind window, 3 is a signal type, 4 is a power line, and 5
is a Scott transformer, 5-1, 5-2 are its outputs, 6 is a synchronous detection circuit, 6-1, 6-2 are its outputs, 7 is an averaging circuit, 7-1, 7-2 are its outputs, 8 is a balanced modulation circuit;
8-118-2 is its output, 9 is a π/2 shift, phase shift circuit, 9-1.9-2 is its output, 10 is a two-signal synthesis circuit, 11 is a synchronous detection circuit, 12 is a comparator, 13 14 is a pulse counting circuit, 15 is a pulse oscillation circuit, 16 is a cuff/recircuit circuit, and 17 is a data output circuit.

In addition, in Fig. 2 showing the connection system of the synchro oscillator 2, 2-1 is the synchro oscillator 20 rotor, 2-2 is the stator, and 3-1 to 3-3 are the output signal lines of the stator 2-2. , 4-1
, 4-2 is the power input line of the trochanter 2-1, 5-3, 5-4
is the winding of the Scott transformer.

The wind direction conversion function includes (1) digitization of data;
(2) Data averaging requires two operations. Note that since the data is ring data, a reverse circuit technology is required to realize the above function, and a synchro-digital conversion method is applied.

As shown in Fig. 2, the rotor 2- which is a synchro oscillator
1 input signal (AC100V) & sinωt, the output from the three-phase transformer coupling of the rotor 2-1 and the identifier 3-1.3-2.3-3 is the output of the rotor 2-1 and the identifier 3.
If θa is the closing angle with -1, then each sin θa-sin ωt sin(θa tenryo) @ stnωtsin(θa
-■) @stnωt is manually applied from each identifier 3-1.3-2.3-3 to each winding 5-3.5-4 of Scott transformer 5, and the vector composite output is from winding 5-3. .5-4, it can be decomposed into X and Y components as Vx=sinθa*sinωt Vy=cosθa@sinωt, respectively.

In addition, by synchronous detection, the DC components sinθa and ωSθ are
a, then the RC averaging circuit 7 sets each output as a time constant RxC (seconds), each output is regarded as a pulse output sinω't, and the balanced modulation circuit 8 calculates sinθa*sinω't. COJθa @sinω′t is created, which becomes outputs 8-1 and 8-2.

The π/2 phase shift circuit 9 converts each output into sinθa
By setting ecos (ω't+α) cosθa * sin (ω' t+α) and synthesizing this in the 21st gear synthesis circuit IO, the angle average value data θa can be processed as follows.

5in(7a++cos(ωt+α) ten cosθaes
in (ωt-4-α) = sin (ω' is 10θa+α) where sinθa = sinθa @ CO8θa=
cos θa From the output of the comparator 12, which determines whether the output of the synchronous detection circuit that synchronously detects this signal with the 5in (ω't+α) signal is 1〒1 or II ).

On the other hand, if the output frequency of the pulse oscillator 15 is Fo (Hz), if an M-ary display is required, the counter 16 is an M-ary counter (however, M can be 16.32.36, etc.) is Fo/M(Ilz) tonal. The pulse counting circuit 14 controls the AND gate 13 with PWJf1 of θa while the counter 16 counts one cycle, passes the pulse of the pulse oscillator 15, and counts the number of pulses.

That is, by pulse counting the ratio of II I It of PWM of the angle signal a, it is extracted as digital angle data and sent to the data output circuit 17.

Since the conventional wind direction changing device is configured as described above, a formal synchronized digital circuit technology is required, which not only makes the circuit complicated but also requires fine adjustments. Because it is a digital circuit that includes long analog circuits, deviations in the accuracy of the circuit specifications appear directly in the conversion stack, and high accuracy cannot be expected.

[Summary of the invention]

This invention was made to eliminate the drawbacks of the conventional ones as described above. By using a shaft encoder in the wind direction window, the angle of the wind vane is directly digitized, and the obtained data is transferred to a microcomputer. The purpose of the present invention is to provide a wind direction converting device with a simple circuit that can average the wind vane angle with high accuracy and create highly accurate data by processing the wind vane.

[Embodiments of the invention]

An embodiment of the present invention will be described below with reference to the drawings. Third
The figure shows the configuration of the wind direction changing device of the present invention as functional blocks, where l is a windmill type wind vane, 200 is a shaft encoder which is a wind direction window section, 3 is a signal line, 20 is a data input means, 21 22 is a gray code conversion means, 22 is an averaging calculation means, 23 is a data creation means, and 24 is various data output means.Furthermore, FIG. 3 shows a specific configuration for realizing these functions. In the figure, 4 is a crosstalk circuit, 31 is an input gate, 32 is a peripheral parallel interface circuit for data input, 33 is a microcomputer circuit, 34 is a system clock input, and 35 is an R
OM136 is a RAM, 37 is a Veri7 engineering parallel interface circuit for display @ operation input/output, 38 is a communication device for printer output, 39 is a communication device for modem output, 40 is a display circuit, 41 is an operation circuit, and 42 is a printer,
43 is a modem.

The configuration of the shaft 71 encoder 200, which is the wind direction window, is
As shown in the figure. This shaft encoder 200 is connected to the wind vane 1
a plurality of light emitting diodes 2-2-1 to 2-2 connected to
−5 and a plurality of phototransistors 2 facing thereto
It has a rotor 201 that rotates between -3-1 and 2-3-5. Shaft encoder 2000 rotation angle is signal line 3
Therefore, in this example, the 5-bit (320,000 position) barrel 2 barrel 4M
The signal is taken out as a signal, and is manually inputted to a peripheral parallel interface 32 via an input gate 31. Figure 6 shows the gray code table.

Codes a5 to al are assigned to the azimuth signal (azimuth value).

FIG. 7 shows a flowchart of the operation of the wind direction changing device configured as described above.

The wind vane angle signal extracted as described above is transmitted to the input gate 31 and the peripheral parallel interface 3.
2 to the microcomputer circuit 33,
The data is temporarily stored in the RAM 36 as processing data and then processed.

On the other hand, the system clock 34 directly (or indirectly) generates a timing signal, and the arithmetic processing proceeds according to the timing. All of these arithmetic operations and input/output are controlled by the ROM 35.

As an example of the output means, membership fee data is displayed and output from the display circuit 40 in response to the number 1d human power from the operation circuit 41,
It is possible to output data for the printer from the communication device 38 and output to the MODEM 43 from the communication device 39 as a remote transmission output.

As shown in the flowchart of Fig. 7, the sampling period Δ
The input data samples 41 per second are gray-coded angular data. This data is expressed as A5, A4, A3, A2, al as an example of a 5-bit signal.A5=a5 A4=A5■a 4=a 5■a4 A3=A4+a3=a5■a4■a3 A2=A3■a 2 = a 51d) a 4 ■ a3
+a2A1=A2■al=a5■a4(Qa3■a2■
It can be converted into binary number as a1. For 5 bits, AI is 11
．． 25°, A2 is 22.5°, A3 is 45°, A4 is 9
0°, A5 corresponds to 1800.

That is, the input angle signal ON is 0n=180@A5+90mA4+45・A3+22.
5・A2+11.25・Al (degrees), A5~A
It can be expressed as a binary value of I (1 is 0).

On the other hand, if the sample periodic Δt% load is m, the nth (current) average value θn can be expressed by the following equation.

θn; θn-1--・Δθn where Δθn=θn-θn+α-180 By performing the chain correction of can.

That is, a new average value θn is created by subtracting the input value on from the previous average value 0n-1, multiplying it by (Δθn) and a load of 17m, and subtracting this from the previous average value On-*. This created On can be output at any time depending on the output condition, independent of the calculation timing.

〔Effect of the invention〕

As described above, the present invention provides an angle-to-digital conversion means that is cheaper than the synchronized digital conversion circuit used in conventional devices, and which synchronizes the angle signals obtained by the shaft encoder. It is possible to perform digital conversion with higher integration and stability than digital conversion, and it can be used in place of conventional synchronized digital conversion circuits.

[Brief explanation of drawings]

FIG. 1 is a block diagram of a conventional wind direction changing device, FIG. 2 is a circuit diagram of its wind direction window, FIG. 3 is a functional block diagram of a wind direction changing device according to an embodiment of the present invention, and FIG. 4 is a detailed diagram thereof. The block diagram showing the configuration, MrJS diagram is the circuit diagram showing the shaft encoder, Figure 6 is the gray code table, Figure 7 is the 4th diagram.
3 is a flowchart of the operation of the device shown in FIG. DESCRIPTION OF SYMBOLS 1... Jt direction=t, 200... Shaft encoder, 20... Data input means, 21... Clay code conversion means, 22... Averaging calculation means, 23... Data creation means, 24...Various data output means, 31.
...input game), 32... Veri 7 Eral Parallel Inter 7 Eighth, 33... Microcomputer circuit, 3
4...System clock input, 35...ROM, 3
6...RAM137...Peripheral parallel interface circuit, 38/39...Communication device, 4o
...Display circuit, 41...Operation circuit, 42...Printer, 43...Modem, 201...Rotor, 2-2
-1~2-2-5...Light emitting diode, 2-3-1~
2-3-5...Phototransistor. In addition, in the figures, the same reference numerals indicate the same or corresponding parts. Patent Applicant Mitsubishi Electric Corporation Agent Patent Attorney 1) Hiroshi Sawa Agent Patent Attorney Nobuo Ishibashi Agent Patent Attorney Kato Koji Figure 2 Figure 3

Claims (1)

[Claims] A wind direction window section that outputs the angle of the wind vane as gray code angle data digitized by a shaft encoder, a data input means that takes in this direction No. 4i at regular intervals, and a gray code for the input data from this data input means. a clay code conversion means for converting the angle data into a binary number; an averaging calculation means for averaging the angle data converted into a binary number;
and output means for outputting the averaged data.