JPS61125700A - Measuring input unit - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a measurement input device that can simultaneously read a plurality of pieces of measurement input information and perform t-sequential A/D conversion on each piece of measurement input information.

[Conventional technology]

Figure 2 is a block diagram showing a conventional measurement input device.
In the figure, (1) and (1) indicate an analog signal input conversion section (hereinafter referred to as AIC), which is composed of a flying capacitor relay (1a) and an AIC output signal switching relay (1b). (2) is each of the above-mentioned relays (1a).

The address decode outputs the scanning signal (2a) that operates (1b), and (8) is output from AIC (1).
fc AIC output signal (IC) tAn analog-to-digital converter (hereinafter referred to as ADC) that converts it into a digital signal.

Note that (41, (4+) indicates measurement input information, and (c) indicates a capacitor that receives measurement input information.

A conventional measurement input device is configured as described above. For example, a plurality of measurement input information (4
1, (41) are read into the AIC (1), (1), the scanning signals (2a), (2a
), the AIC is sequentially scanned.

ft-A I C selected based on the scanning signal (2a)
(1) is a flying capacitor relay (1a) el1
Then, the measurement input information (4) is stored in the capacitor (C), and then the flying capacitor relay (1a) is switched and controlled, and the Arc output signal switching relay (1b)'
is switched and sent to the ADC (81) as the measurement input information (41iAIC output signal (1C)).

Above - Load measurement input information (4), ADC (8)
After sending out the data to the ADC (81), the measurement input information (42) is read into the next scanning signal (2a), selected in the same manner as above, and sent to the ADC (81). Measurement input information (4+, (41i sequential ADC (81
It can also be sent to.

[Problem that the invention seeks to solve]

In the above-mentioned complicated conventional measurement input device, each flying capacitor relay operates in synchronization with each scanning signal sent out with a time difference, so the timing of reading multiple measurement input information is different, and the timing of reading multiple measurement input information is instantaneously simultaneous. There are problems with the accuracy of measurement data because multiple pieces of measurement input information cannot be collected at the same time as the process progresses, and there are also disadvantages such as the need to provide a flying capacitor relay for each AIC. This was done in order to eliminate the drawbacks of the conventional one, by placing the flying capacitor relay inside and putting the nine measurement input circuit in front of the AIC.The flying capacitor relay can be removed from the Arc, and multiple measurements can be performed. The purpose of the present invention is to provide a measurement input device that can simultaneously read input information at the same timing.

[Means for solving problems]

The measurement input device according to the present invention includes a flying capacitor relay that can control a plurality of measurement input information at once,
By operating this relay using a synchronization signal for reading information, it is possible to read a plurality of pieces of measurement input information at one time and then sequentially send it to the ADC.

[Effect]

In this invention, the flying capacitor relay that reads and controls multiple pieces of measurement input information is operated by a synchronization signal, and multiple pieces of measurement input information can be read in the same dimming. Measurement data with no time difference can be obtained.

〔Example〕

Figure 1 is a block diagram showing one implementation of the present invention, and the same reference numerals as in Figure 2 indicate the same or corresponding parts, and detailed explanation will be omitted. In the figure, (6) is a measurement input circuit having a flying capacitor relay (1a) t- that can switch and control a plurality of measurement input information (4), (4), and (6) c) the above flying capacitor relay (1a) t- is activated. Synchronous signal (6a)? This is a synchronization signal generation circuit that generates a synchronization signal.

In the measurement information input device configured as described above, the measurement input information (4), which is sent from the plurality of measurement points to the measurement input circuit (6), is output to the synchronization signal generation circuit (6). The flying capacitor relay (1a) operates in synchronization with the synchronous number (6a) and is input to the measurement input circuit (6) at the same timing, and each AIC (1).

(1).

After that, the AIC output signal switching relay (1b) is switched to the scan signal (2a), which is sequentially sent out from the address decode (2), and the ArC output signal (1a
) are sequentially sent to ADC (81).

Although the configuration and operation of the measurement input method has been described in detail in this embodiment, it goes without saying that this concept can be applied to various information transmission devices.

〔Effect of the invention〕

As explained above, this invention has a configuration in which a flying capacitor relay is installed in a measurement input circuit independent of an analog input conversion circuit, and measurement input information is read using a synchronization signal. Because multiple measurement inputs can be collected at the same time, highly accurate measurement data can be obtained, and an inexpensive analog input conversion circuit can be provided.◇

[Brief explanation of drawings]

FIG. 1 is a block diagram of a measurement input device according to an embodiment of the present invention, and FIG. 2 is a block diagram of a conventional measurement input device. (1): Analog input conversion circuit (1”): Flying capacitor relay (1b): A
I C output signal switching relay (2) Near address decoding (5) Two measurement input circuits (6) Two synchronous signal generation circuits

Claims (1)

[Claims] A plurality of analog input converters each having a flying capacitor relay that controls the reading of measurement input information, an output signal switching relay that controls the output of the read measurement input information, and each of the above-mentioned relays built into each of the analog input converters. In a measurement input device equipped with an address decode that sequentially sends out scanning signals in order to operate the analog input converter, the measurement input circuit includes a flying capacitor relay separated from the analog input converter, and a flying capacitor relay built into the measurement input circuit. Equipped with a synchronization signal generation circuit that generates a synchronization signal that activates the capacitor relay, and after controlling the reading of multiple measurement input information using the synchronization signal, controls the transmission of measurement input information from the analog input converter to an external circuit using a scanning signal. A measurement input device characterized by: