JP2842321B2 - Data collection device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a data collection device, and more particularly to a data collection device for collecting measurement data from various sensors in an aircraft or the like.

[0002]

2. Description of the Related Art Conventionally, in a data collecting apparatus of this type, a plurality of signal conditioners collect measurement data collected from various sensors (such as a temperature sensor and a strain sensor) in a system by using a pulse-code module (PCM).
The signal is converted into a PCM signal by an encoder and stored in a storage device, or transmitted to a ground station.

[0003] As shown in FIG. 3, the data collecting device is composed of signal conditioners 4 and 5 and a PCM encoder 6. The signal conditioners 4 and 5 collect signals from various sensors (not shown) and signal lines 140-5. k (k = 1,
,...), 150-1 (l = 1, 2,...) To the PCM encoder 6
The signal is converted into an M signal and sent to a storage device or a transmitter (not shown).

Each of the signal conditioners 4 and 5 comprises analog amplifiers 41-k and 51-k. The PCM encoder 6 comprises a multiplexer 61, an A / D (analog / digital) converter 62 and a frame synchronization pattern generator 63.
And a P / S (parallel / serial) converter 64. In the PCM encoder 6, the A / D converter 62, the frame synchronization pattern generator 63, and the P / S converter 64 are connected to each other via an internal bus 600.

The analog amplifiers 41-k and 51-k of each of the signal conditioners 4 and 5 amplify or convert analog signals from various sensors input for each channel (CH) (for example, DC voltage of AC voltage value). Conversion to value)
And the amplified or converted analog signal is sent to signal line 1.
The data is transmitted to the PCM encoder 6 via 40-k and 150-l.

The multiplexer 61 of the PCM encoder 6
Is a signal line 140 from each of signal conditioners 4 and 5.
-K, 150-l The analog signal input through 150-l is temporally switched and output to the A / D converter 62.

An A / D converter 62 converts an analog signal which is time-switched and input from the multiplexer 61 into a digital signal, and converts the digital signal into an internal bus 6.
00 Further, the frame synchronization pattern generation unit 63 transmits the generated frame synchronization pattern to the internal bus 600.
Send up.

[0008] The P / S converter 64 converts the digital signal sent from the A / D converter 62 and the frame synchronization pattern from the frame synchronization pattern generator 63 sent out onto the internal bus 600 into serial data and converts it into a PCM signal. Output.

[0009]

In the above-mentioned conventional data collecting apparatus, a plurality of signal conditioners are used to transmit a signal to a PC.
Since data transmission to the M encoder is performed by analog signals, it is difficult to reduce the amount of wiring between them.

It is an object of the present invention to solve the above-mentioned problems and to provide a data collection device capable of reducing the amount of wiring between a plurality of signal conditioners and a PCM encoder.

[0011]

A data collecting apparatus according to the present invention includes a plurality of signal conditioners for collecting analog data from within a system, and an encoder for converting the analog data into a pulse code modulation signal. An instruction signal for instructing each of the plurality of signal conditioners to include a conversion unit for converting the analog data into serial digital data, and instructing any one of the plurality of signal conditioners to transmit the serial digital data. The encoder is provided with instruction means for outputting the signal to each of the plurality of signal conditioners, and transmission means for converting the data converted by the conversion means into the pulse code modulation signal and transmitting the signal to the outside.

Another data collection apparatus according to the present invention includes a plurality of signal conditioners each for collecting analog data from at least a plurality of sensors in a system, and an encoder for converting the analog data into a pulse code modulation signal. A data collection device, wherein each of the plurality of signal conditioners includes a conversion unit for converting analog data from the plurality of sensors into serial digital data, and the serial digital signal is provided to any one of the plurality of signal conditioners. Instruction means for outputting an instruction signal for instructing data transmission to each of the plurality of signal conditioners, and transmission means for converting the data converted by the conversion means into the pulse code modulation signal and sending it to the outside, Provided in the encoder.

[0013]

DESCRIPTION OF THE PREFERRED EMBODIMENTS First, the operation of the present invention will be described below.

A command for instructing any one of the plurality of signal conditioners to transmit serial digital data is transmitted from a command transmission unit of the PCM encoder, and the signal conditioner specified by the command is transmitted from various sensors in the system. The collected analog data is converted into serial digital data and transmitted to the PCM encoder, and the serial digital data from the signal conditioner is converted into a PCM signal by the PCM encoder and transmitted to the outside.

[0015] This makes it possible to transmit data between the signal conditioner and the PCM encoder in the form of serial digital data, thereby reducing the amount of wiring between the signal conditioner and the PCM encoder. It becomes possible.

Next, an embodiment of the present invention will be described with reference to the drawings. FIG. 1 is a block diagram showing the configuration of one embodiment of the present invention. In the figure, a data collection device according to one embodiment of the present invention includes signal conditioners 1 and 2,
The signal conditioners 1 and 2 and the PCM encoder 3 respectively include a data signal line 101 and a clock signal line 10 in a party line format.
2 connected.

Each of the signal conditioners 1 and 2 includes an analog amplifier 11-i (i = 1, 2,...) And 21-j.
(H = 1, 2,...) And the multiplexers 12, 22
, An A / D (analog / digital) converter 13, and command receiving units 14 and 24.

The PCM encoder 3 is an S / P (serial /
It comprises a (parallel) converter 31, a frame synchronization pattern generator 32, a command transmitter 33, and a P / S (parallel / serial) converter 34. In addition, PCM
In the encoder 3, the S / P converter 31, the frame synchronization pattern generator 32, and the P / S converter 34 are connected to each other via the internal bus 300.

The analog amplifiers 11-i and 21-j of each of the signal conditioners 1 and 2 amplify or amplify analog signals from various sensors (not shown) in the system which are input for each channel (CH). Conversion (for example, conversion of an AC voltage value to a DC voltage value) is performed, and the amplified or converted analog signal is output to the multiplexers 12 and 22.

The multiplexers 12, 22 are amplified or converted by the analog amplifiers 11-i, 21-j when the command receiving units 14, 24 receive the unit address (identification information) of their own circuit via the clock signal line 102. An analog signal is output to A / D converters 13 and 23. A /
The D converters 13 and 23 convert the analog signals from the multiplexers 12 and 22 into digital signals, and transmit the digital signals to the data signal line 101 in the form of serial digital data.

The S / P converter 31 of the PCM encoder 3 converts serial digital data transmitted through the data signal line 101 into parallel data,
00

Here, a bus control unit (not shown) is connected to the internal bus 3
00, and controls the transmission timing of data from the S / P converter 31, the frame synchronization pattern generator 32, and a check data generator (not shown) such as a CRC to the internal bus 300. ing. Therefore, the parallel data from the S / P converter 31 and the frame synchronization pattern from the frame synchronization pattern generator 32 are taken into the P / S converter 34 at a preset timing.

The command transmitting unit 33 converts the unit address data designating each of the signal conditioners 1 and 2 into the NRZ-L (Non-Return) signal in the clock signals to the signal conditioners 1 and 2 at a fixed timing.
(n to Zero-Level), that is, not returning to 0 V in the middle of one bit period, and transmitting it as a command to each of the signal conditioners 1 and 2.

The P / S converter 34 converts the parallel data sent from the S / P converter 31 and the frame synchronization pattern from the frame synchronization pattern generator 32 and the like sent to the internal bus 300 into serial data, and converts them into PCM signals. Output as

FIG. 2 is a time chart showing the operation of one embodiment of the present invention. The operation of the embodiment of the present invention will be described with reference to FIGS.

An analog signal [CH1 analog signal, CH2 analog signal,...
..] Are A / D converted by the A / D converters 13 and 23 of the signal conditioners 1 and 2 and transmitted to the PCM encoder 3 via the data signal line 101 in the form of serial digital data.

The PCM encoder 3 incorporates the unit addresses of the designated signal conditioners 1 and 2 into the clock signal in the form of NRZ-L at a fixed timing, and sends the signal addresses from the command transmission unit 33 to the signal conditioners 1 and 2. The command is transmitted on the clock signal line 102 as a command.

In the signal conditioners 1 and 2 corresponding to the unit address in the clock signal transmitted via the clock signal line 102, the A / D converters 14 and 24 convert the analog signal of the designated channel into A / D signals. D conversion,
The serial digital signal is transmitted on the data signal line 101 at a predetermined timing. The PCM encoder 3 captures data on the data signal line 101 and collects data.

As described above, the signal conditioners 1 and 2
2 is transmitted from the command transmission section 33 of the PCM encoder 3 to the signal conditioner 1 or 2 designated by the command to serially convert the analog data collected from various sensors in the system. Convert to digital data and PCM
The signal is transmitted to the encoder 3 and the signal conditioners 1, 2,
Digital data from PCM encoder 3
By converting to PCM signal and sending it out,
Data transmission between the signal conditioners 1 and 2 and the PCM encoder 3 can be performed in the form of serial digital data. Therefore, the signal conditioner 1,
2 and the amount of wiring between the PCM encoder 3 can be reduced.

[0030]

As described above, according to the present invention, there is provided a data collection device including a plurality of signal conditioners for collecting analog data from within a system and a PCM encoder for converting analog data into a pulse code modulation signal. The PCM encoder outputs an instruction signal for instructing any one of the plurality of signal conditioners to transmit serial digital data to each of the plurality of signal conditioners, and the analog data is serialized by the signal conditioner corresponding to the instruction signal. The PCM encoder converts the digital data into digital data and sends it to the PCM encoder. The PCM encoder converts the serial digital data into a pulse code modulation signal and sends the signal to the outside. To reduce There is an effect that can be.

[Brief description of the drawings]

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

FIG. 2 is a time chart showing the operation of one embodiment of the present invention.

FIG. 3 is a block diagram showing a configuration of a conventional example.

[Explanation of symbols]

1, 2 signal conditioner 3 PCM encoder 11-1, 11-2, 21-1, 21-2 analog amplifier 12, 22 multiplexer 13, 23 A / D converter 14, 24 command receiving unit 31 S / P converter 33 Command transmission unit 34 P / S converter

Claims (4)

(57) [Claims] 1. A data collection device comprising: a plurality of signal conditioners for collecting analog data from within a system; and an encoder for converting the analog data into a pulse code modulation signal, wherein the analog data is converted into serial digital data. Each of the plurality of signal conditioners has a conversion unit for converting, and outputs an instruction signal for instructing any one of the plurality of signal conditioners to transmit the serial digital data to each of the plurality of signal conditioners. A data collection apparatus comprising: an encoder; and an instruction unit, and a transmission unit that converts the data converted by the conversion unit into the pulse code modulation signal and transmits the signal to the outside. 2. The instructing means adds identification information designating any one of the plurality of signal conditioners to a clock signal supplied from the encoder to each of the plurality of signal conditioners, and generates the instruction signal. The data collection device according to claim 1, wherein the data collection device is configured to output the data. 3. A data collection device, comprising: a plurality of signal conditioners for collecting analog data from at least a plurality of sensors in a system; and an encoder for converting the analog data into a pulse code modulation signal. An instruction for instructing any one of the plurality of signal conditioners to transmit the serial digital data to each of the plurality of signal conditioners, wherein the conversion unit converts the analog data from the plurality of sensors into serial digital data. Instruction means for outputting a signal to each of the plurality of signal conditioners, and sending means for converting the data converted by the converting means into the pulse code modulated signal and sending it to the outside, wherein the encoder has Data collection device. 4. The indication means adds identification information designating any one of the plurality of signal conditioners to a clock signal supplied from the encoder to each of the plurality of signal conditioners, and adds the identification information as the indication signal. The data collection device according to claim 3, wherein the data collection device is configured to output the data.