JPS6328540B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a multichannel encoder device useful for time division multiplexing of analog signal inputs, such as telemeter measurement devices.

Conventionally, a telemeter measurement device using this type of time division multiplexing system, as shown in FIG.
The signal conditioner 2 converts it into a constant bull scale, inputs it to the multiplexer 3, performs time division to obtain a time division signal 4 with matching full scale, and then converts this signal 4 into data by an encoder 5. Appropriate processing is performed on the signal, a synchronization signal is added, and when the currently received data (for example, 1a) is selected, the channel switching signal 6 is sent to select the next data 1b.
is supplied to the multiplexer 3 and transmitted via the transmitter 8 and antenna 9. That is, the signal conditioner compensates for the offset and gain caused by the characteristics of the measurement sensor. Therefore, since the number of signal conditioners increases in proportion to the number of input signals, it has been difficult to reduce the size and weight of the signal conditioner in the case of multi-channel transmission.

In an analog signal input type time division multiplexing system, the present invention combines a plurality of signal conditioners into a single signal conditioner and transmits a pre-known arbitrary offset amount and amplification degree to a D/A converter and a ladder network type attenuator. This is a small, compact system that eliminates the above-mentioned drawbacks of the conventional technology by synchronizing with the time-division multiplexed signal and switching sequentially.
The present invention provides a multi-channel encoder device that can be lightweight.

Next, an embodiment of the present invention will be described with reference to FIG.

Input signal terminals 10a, 10b, 10c..., 10
A signal having a different full scale inputted from the multiplexer 11 is converted into a time division signal 13 proportional to the input signal (generally the full scale does not match), and is inputted to the signal conditioner 12.
The signal conditioner 12 is composed of two circuits, one for setting offset and the other for setting amplification level.
It consists of a D/A converter 16 and an offset amplifier 17, and determines the offset of the input signal. As mentioned above, the amount of offset can be measured by checking the characteristics of the sensor in advance, so this amount of offset is determined for each sensor and stored in the P-ROM. Also, for setting the amplification degree, an address counter 18 and a P-ROM 19 which records the amplification degree information of each channel,
The degree of amplification is determined by the attenuation ladder network 20 and the amplifier 21. Since the amplification information stored in the P-ROM 19 can also be measured in advance, it is stored in the P-ROM 19 as data for compensation. A channel switching signal 24 that specifies offset settings and amplification settings for each channel is received from the encoder 23 and operated. As a result, the signal conditioner output 22 becomes a time-division amplitude signal that is fully scaled for each channel, and the encoder 23
The encoded signal 25 is extracted, passed through a transmitter 26, and transmitted by an antenna 27.

As explained above, the present invention makes it possible to combine many signal conditioners into one by matching the signal passed through the multiplexer to the channel and switching the offset and amplification level, which has the effect of reducing size and weight. . In addition to P-ROM control, it is also possible to control a computer, etc.

[Brief explanation of the drawing]

FIG. 1 is a block diagram of a conventional multi-channel encoder device, and FIG. 2 is a block diagram showing an embodiment of the present invention. 1a to 1n, 10a to 10n...input signal terminals,
2,12...signal conditioner, 3,11...
Multiplexer, 4, 22... Time division signal with matching full scale, 5, 23... Encoder, 6, 24... Channel switching signal, 7, 25... Coded signal, 8, 2
6...Transmitter, 9, 27...Antenna, 13...Time-division signal whose full scale does not match, 14...Address counter, 15...Record offset information P-
ROM, 16...D/A converter, 17...offset amplifier, 18...address counter, 19...P-ROM recording amplification information, 20...attenuation ladder network, 21...amplifier.

Claims (1)

[Claims] 1. A switch that selectively connects one input terminal from a plurality of channel input terminals to an output terminal in response to a predetermined control signal, and offset information for offset compensation that is connected to the output terminal of this switch and is determined corresponding to each channel. and amplification degree information for amplification degree compensation are stored, and offset compensation processing and amplification degree compensation processing are performed on the data using the offset information and amplification degree information for each data corresponding to the channel selected by the operation of the switch. a signal conditioner that performs the following; and an encoder that performs a predetermined encoding process on the output of the signal conditioner and sends out the control signal that connects the input terminal corresponding to the channel to be selected next. A multi-channel encoder device comprising: