JPS61294503A - Arithmetic unit - Google Patents

Abstract

PURPOSE:To increase the universal applicability of an arithmetic unit by converting this unit into a computer to program the contents of various types of operations and at the same time designating the program of arithmetic contents for execution of arithmetic processing. CONSTITUTION:An arithmetic unit consists of a circuit substrate containing a signal switch 11, an A/D converter 12, a D/A converter 13, an interface logic 14, a CPU 15, a ROM 16, a RAM 17 and a data bus 18. The ROM 16 stores the arithmetic programs of addition, subtraction, differentiation, integration, etc. and a selecting program for those said programs. An arithmetic function selecting switch 21 is connected to the substrate 1 for designation of a desired operation. Then the analog signals are converted into digital signals and applied to an arithmetic processing means. The arithmetic program designated by the switch 21 is selected and executed. The result of this program execution is converted into analog signals by the converter 13 and delivered.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a calculation unit used for simulation of control elements of various systems or plants.

[Prior Art] For example, when simulating control elements of various systems or plants, for example, addition is required.

It requires an arithmetic unit for elements such as subtraction, differentiation, integration, and phase delay, but conventionally, the arithmetic unit for obtaining these necessary elements has been a general-purpose analog operational amplifier, a resistor,
They have been configured by adding elements such as capacitors to obtain the desired function, or have used specific single functions, such as analog arithmetic units such as multipliers and dividers.

[Problem to be solved by the invention 1 There was a problem. That is, firstly, it is necessary to prepare arithmetic units for various functions, which is time consuming and costly. Secondly, if an analog processing unit with functions that are not commercially available is required, it is necessary to design and manufacture a new one, which requires specialized knowledge and development time, is time consuming, and increases costs. It is.

Therefore, an object of the present invention is to obtain an arithmetic unit that can easily obtain a desired function and is also versatile.

[Means for Solving the Problems] In order to achieve the object described below, the present invention provides an A/D converter that converts an input analog signal into a digital signal, and a storage device that stores a plurality of calculation programs. , means for selecting a program in the storage device and arithmetic processing of the digital signal, and a [ )/A converter for converting the output digital signal of the storage device into an analog signal.

[Function] The device of the present invention having such a configuration is a computerized arithmetic unit. Various calculation contents are programmed into the storage device. When the analog signal is converted into digital data and given to the arithmetic processing means, and an arithmetic program is specified, the arithmetic processing means selects and executes the specified arithmetic program from among the programs stored in the storage device. , the calculation result is converted into an analog signal by a D/A converter and output.

[Effects of the invention] By making the computer into a computer in this way, allowing various calculation functions to be provided by programs, selecting and executing the necessary calculation programs, and outputting the results in analog form, a wide variety of It is possible to have arithmetic functions all at once, and it is possible to easily realize calculations with the desired functions.Therefore, it is highly versatile, and since various calculation contents can be programmed, it is possible to implement various calculation functions at low cost. You will be able to hold it. Therefore, it is no longer necessary to prepare arithmetic units for various functions as in the past, and there is also no need to take the time to design and manufacture hardware to obtain the desired functions, which can eliminate labor and costs. Benefits such as:

[Example] Hereinafter, the present invention will be described in detail with reference to the drawings.

FIG. 1 is a block diagram showing the main structure of this device. In the figure, 1 is a calculation unit circuit board, and this calculation unit circuit board 1 includes a signal switch 11, an A/D (analog/digital) converter 12, a D/A (digital/analog) converter 13, and an interface logic. 14.CPU
(Central processing unit; e.g. microcomputer) 1
5. ROM (Read Only Memory) 16. RAM
(random access memory) 17 and a data bus 18.

The signal switching device 11 has a plurality of input terminals, and analog input signals (input data) Sl, -Sn of different systems are input to these input terminals, respectively.

Then, one of these input terminals is selected under the control of c p u is and the analog input signal from that terminal is passed. The A/D converter 12 converts the analog input signal obtained through the signal switch 11 into a digital signal. The converted digital signal output of this A/D converter 12 is configured to be input to a data bus 18 via an interface logic 14. Also,
The ROM 16 stores programs to be executed by the CPU 15, and the RAM 17 stores the programs to be executed by the CPU 15.
The working area, data storage area, buffer area for CP Li2S to execute the program in 6.
It is used as an area, etc. The data bus 18 connects these CPU 15° ROM 16. Bus connecting RAM17
line, and through this data bus 18 these C lines.
P U 15° ROM16. The RAM 17 exchanges data. This data bus 18 is connected to the outside via the interface logic 14, and can exchange data with the outside. The D/A converter 13 is connected to a data bus 18 via an interface logic 14, and receives numerical data output from the CPU 15 or CP
ROM16 or RAM under the control of U15
The stored data read from 17 is converted into an analog signal and output as an analog output signal 311.

321 is a start control signal for instructing c p u +s to start calculation execution, and 322 is a start control signal for instructing CPU
Reference numeral 15 indicates a control completion signal generated at the end of the work. Further, 331 indicates an arithmetic function selection signal for specifying an arithmetic function for the CPU 15.

Further, 21 is an arithmetic function selection switch, and the CPU 15
This is a hardware switch for specifying arithmetic functions. The interface logic 14 connects each of these signals S2 between the data bus 18 and the outside world.
1.822. S31 also plays the role of exchanging switch status information of the function selection switch 21. Further, the CPU 15 is connected to each element 11. which constitutes the arithmetic unit circuit board 1. ~17 controls. Above ROM1
For example, 6 includes addition, subtraction, 1 multiplication, division, differentiation, integration,
- Various necessary programs such as various calculation programs such as next delay, programs for selecting these various calculation programs, data input/output control programs, etc. are stored, and the CPU 1
5 executes the data input/output control program and waits for the input of the start control signal 321 via the interface logic 14 when in the hold state, and when the start control signal 821 is input, the program for selecting various calculation programs is executed. is executed to select the program for the arithmetic function specified by the settings of the arithmetic function selection switch 21 and the input of the arithmetic function selection signal 831, and at the same time to read data from the A/D converter 12. The computer then executes the selected arithmetic function program on this data to obtain the result, outputs this to the D/A converter 13, outputs a control completion signal S21, and enters a waiting state. .

FIG. 2 is a perspective view showing the external appearance of this device. In the figure, 22 is a box-shaped arithmetic unit case, and 1 is the above-mentioned arithmetic unit circuit board, which is installed inside the arithmetic unit case 22. .

21 is the arithmetic function selection switch mentioned above, which selects the arithmetic unit/
It is attached to the outside of the case 22. Further, 23 is a plurality of input terminals (in this example, a two-man powered type), 24 is an output terminal,
Reference numeral 25 indicates control signal input/output terminals, which are also attached to the outside of the arithmetic unit case 22.

The input terminal 23 receives the analog input signal S1. -3n input, the output terminal 24 is for outputting the analog output signal 821, and the control signal input/output terminal 25 is for outputting the start control signal S21. Control completion signal S22. This is for input/output of calculation function selection signal @831, etc.

Next, the operation of this device having the above configuration will be explained.

In this device, the calculation function selection switch 21 is selected in advance to designate the calculation to be performed. Then, a start control signal 821 is applied from the outside (for example, a calculation unit in the previous stage), and an analog input signal (Sl
, ~sn> to the signal switch 11. Upon receiving the start control signal 821, the CP Ll 15 starts control according to the program in the ROM 16, selectively controls the signal switch 11 to selectively extract analog input signals (Sl, to Sn), and also performs A/D conversion. 12 to convert the selected analog input signal into a digital signal.

Then, this digital signal is taken in via the interface logic 14 and the data bus 18, and an arithmetic program specified by the arithmetic function selection switch 21 is executed on the taken-in digital data. CPU1
5 sends the result of this operation to the interface logic 14
The signal is output to the D/A converter 13 via the D/A converter 13, and at the same time, a command is given to the D/A converter 13 to execute D/A conversion. As a result, the above calculation results are converted into analog and output. Further, at this time, the CPU 15 outputs a control completion signal 822 to inform the outside that the calculation and output of the result have been completed.

The CPU 15 then enters a waiting state. By repeating the above process, the analog input signal (Sl,
~Sn) can be continuously output as the analog output signal 811. Note that the calculation program can be selected by applying the calculation function selection signal S31 instead of the calculation function selection switch 21. And in this case,
Since it is possible to specify the calculation contents using software,
l! It becomes possible to perform complex calculations.

In this way, the calculation unit is computerized, various calculation contents are programmed, analog signals are converted into digital data, and the necessary calculation contents are specified and the calculation processing is executed, and the calculation results are Since it is converted into an analog signal and output, calculations with the desired functions can be easily performed.Therefore, it is highly versatile, and since various calculation contents can be programmed, it is possible to perform various calculation functions at low cost. You will be able to hold it. Therefore, it is no longer necessary to prepare arithmetic units for various functions as in the past, and there is also no need to take the time to design and manufacture hardware that achieves the desired functions, eliminating the need for labor and high costs. Benefits such as:

It should be noted that the present invention is not limited to the embodiments described above and shown in the drawings, and can be implemented with appropriate modifications within the scope of the gist thereof.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing an embodiment of the present invention;
FIG. 2 is a perspective view of the device. DESCRIPTION OF SYMBOLS 1... Arithmetic unit circuit board, 11... Signal switcher, 12... A/D (analog/digital) converter,
13...D/A (digital/analog) converter, 1
4...Interface logic, 15...CP
U (central processing unit), 16...ROM (read/read)
only memory), 17...RAM (random access memory), 18...data bus, 21
... Arithmetic function selection switch, 22... Arithmetic unit case, 23... Input terminal, 24... Output terminal,
25...Control signal input/output terminal, 81°~3n...Analog input signal, 311...Analog output number, 831
...Arithmetic function selection signal.

Claims (1)

[Claims] A/ that converts the input analog signal into a digital signal
a D converter, a storage device storing a plurality of arithmetic programs, a means for selecting a program in the storage device and arithmetic processing the digital signal, and a D converter for converting the output digital signal of the storage device into an analog signal. /A converter.