JPS59197999A - Multipoint data measuring apparatus - 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 The present invention relates to a multi-point data measuring device that measures data at multiple points.

A multi-point data measuring device generally has an analog input section consisting of a signal conditioner and an analog-to-digital converter, and multi-point measurement data is switched and applied to this analog input section using a multiplexer. There are various types of multiplexers, such as relays, semiconductor switches, and switched capacitors, each of which has its own advantages and disadvantages as a switching element. However, there is no one that can satisfy all requirements such as isolation 6 accuracy and measurement speed. Further, the conventional method has disadvantages in terms of the function of each input channel, arbitrary setting of measurement range, and simultaneous measurement.

An object of the present invention is to realize a new type of multi-point data measuring device that compensates for the drawbacks of the conventional method as described above, and an embodiment thereof is shown in FIG.

In FIG. 1, ln1. , In2, ...InN
are respectively analog Rokutsuba AN1. A++2.・・・・・・
A) IN is an analog input section provided for each input channel. In the analog input section ANl, SC is a signal conditioner, A/D is a precision analog-to-digital converter (hereinafter simply referred to as an A/D converter) that converts the output of the signal conditioner SC into a parallel digital signal, CO is a control circuit. The output of the control circuit CO is sent to the signal conditioner SC and A/D converter, and the signal conditioner SC sets the measurement function, gain, etc., and the A/D converter sets the timing for starting A/D conversion. is set. Cv is a converter circuit consisting of a parallel-serial converter P/S and a series-parallel converter S/P, and the output signal of the A/D converter is converted into a serial digital signal by the parallel-serial converter Cv, and then the main control and Data obtained by the processing device is 1a.
The column parallel converter S/P converts it into a parallel digital 4B signal and adds it to the 1IIU control circuit CO. Analog input J part AN2. ...ANN also has exactly the same configuration as the analog input section ANI described above.

ISl, IS2...ISN is an isolator provided for the annular six-point fil (ANl, ΔN2......ANN, μP is the main control/processing unit, I
Fl and 1F2 are interfaces, respectively. Analog input section l~N1. AN2.・・・・・・Each serial data from which ANN comes out is an isolator l511S2-...
. . . After being isolated by ISN, it is transmitted as data A to the main control/processing unit μP via the interface IFl. On the other hand, the digital data outputted by the main control/processing unit μP is sent to the interface IF2, and the clock A, parallel data B, and clock B outputted by the interface IF2 are sent to the isolator IS1. IS2.・
...Analog Human Power Department ANI via ISN.

Heto J2. ....Transfer to the converter circuit C■ in the ANN. The operation of this type of device will be explained as follows using the timing chart shown in FIG.

Analog human power 1nlAn2. ...InN is the analog input section AN1. AN2. ...Added to the signal conditioner SC in 8NN. On the other hand, the output of the main control/processing unit μP is the interface IF
Added to 2. The clock B obtained via the interface IF2 is obtained simultaneously for each channel, and the data B is obtained from the isolator IS1. ls2. ...
...is transmitted to the control circuit CO via ISN and the series-parallel converter S/P. Upon receiving this signal, each control circuit C
o provides setting data to each signal conditioner Sl simultaneously for each channel, and simultaneously provides an A/D conversion operation signal to each A/D converter. Finally, in the signal conditioner SC, the functions of each input channel, measurement range settings, etc. are performed simultaneously for each channel and for each J channel for each person. This state 7 is shown as T1 in FIG. Note that #1 in Figure 2. #2,...
#N represents a channel number. Next, each control circuit CO
The output signal of the signal conditioner Sl is simultaneously converted into a digital signal in an A/D converter for each channel using the timing signal obtained from the above timing signal. This A/D conversion time is shown as T2 in FIG. 2 as a measurement period. The A/D converter has a latch function and latches the A/D converted data. Next, the main control/processing unit μP outputs a clock A for reading data, and this clock A is applied to the isolator IS1. IS2. ...ISN
to the parallel-series converter P/S. This clock sequentially reads out the data latched in the A/D converter of each channel. The called serial data A is sent to isolator IS1. l52-...
... are transferred to the same signal line via the ISN, sequentially added to the interface IFI, and then transmitted to the main control/processing unit μP. The main control/processing unit μP processes the captured data using known means. The timing of transmitting data to the main control/processing device μP is indicated by time T3 in FIG. At time T3, tl indicates the data transmission period of channel #1, t2 indicates the data transmission period of channel #2, . . . tN indicates the data transmission period of channel #N.

In the apparatus of the present invention having such a configuration, [a] Since it is a multi-channel parallel simultaneous measurement method that measures channels at multiple points simultaneously, it is possible to increase the speed.

(b) Since a local control circuit controlled by the main control/processing device is provided for each channel, measurement functions and measurement ranges can be arbitrarily and easily set for each channel.

(c) Highly accurate isolation can be achieved between each channel, between people, and between outputs.

According to the present invention, it is possible to obtain a multi-point data sub-device that can eliminate the drawbacks of conventional multi-point data measuring devices using multiplexers.

Note that in the device of the present invention, the signal conditioner S
By integrating the analog input section consisting of C, A/D converter, converter circuit CO, and control circuit CO, it is possible to reduce the number of components with a small size, and to further demonstrate the features of the present invention. becomes

[Brief explanation of the drawing]

FIG. 1 is a block diagram of an embodiment of the apparatus of the present invention, and FIG. 2 is a timing chart for explaining the operation of FIG. 1. SC...signal conditioner, Δ/D...analog-digital converter, CO...control circuit, ANl
, AN2. ......1) jN...Analog input section, l5I-IS2...'ISN - Isolator, μP... Main control/processing device.

Claims (2)

[Claims] (1) A multi-point analog input section provided for each channel, consisting of an analog/digital converter with a signal conditioner and a latch function, and a control circuit; isolators provided for each of these analog input sections; and a main control/processing device.
The output of the processing device is applied to the signal conditioner and the analog-to-digital converter via the control circuit in each analog input section, and the state setting of the signal conditioner is simultaneously performed for each channel.
The conversion operation of the analog-to-digital converter is performed simultaneously on each channel, and the output of this analog-to-digital converter is sequentially transferred to the main control/processing device via an isolator, and data processing is performed by the main control/processing device. A multi-point data measurement device. (2) A multi-point data measurement device according to claim (1), in which each of the analog input sections is integrated into an integrated circuit.