JPH04344937A - Fuzzy inference device - Google Patents

Abstract

PURPOSE:To prevent fuzzy inference from being executed by erroneous knowledge data so that the reliability of the inference is improved by erecting an in-programming flag at the time of the start of write-in, and discriminating the interruption of the write-in of the knowledge data based on the state of this flag. CONSTITUTION:A signal processing part 12 is constituted of a microcomputer, and a knowledge data writing means 14 to write the knowledge data of the fuzzy inference obtained from a host computer 6 to a program memory 7, a transferring means 15 to transfer a signal at every prescribed period from an input interface 2 to a fuzzy inferor 8, a control means 16 to control the in-programming flag to be erected at the time of the write-in of the knowledge data, and a discriminating means 17 to discriminate the interruption of the write-in of the knowledge data are provided in addition to an internal memory 13. Then, at the time of writing the knowledge data in a fuzzy inference device, the in-programming flag is set by the flag control means 16, and after the finish of the write-in, it is reset, and it can be discriminated whether the knowledge data is being transferred or not.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a fuzzy inference device which uses a fuzzy inference device to perform fuzzy operations.

0002

2. Description of the Related Art Conventionally, in a fuzzy sensor controller with a built-in fuzzy inference device, as shown in FIG. The signal is supplied to the signal processing section 3 via the signal processing section 3. The signal processing section 3 is realized by a microcomputer, and an internal memory 3a is provided therein. An operation mode setting section 4 for setting a program mode and an operation mode is connected to the signal processing section 3. Further, a higher-level computer 6, such as a personal computer, is connected via the communication interface 5. A program memory 7 for storing membership functions, fuzzy rules, etc. is connected to the signal processing unit 3 as an external memory, and a fuzzy inference device 8 for performing fuzzy inference based on the data in this memory is connected. Ru. The fuzzy inference device 8 stores a memory 8a for storing membership functions and fuzzy rules (hereinafter referred to as knowledge data). The fuzzy reasoner 8 is a digital fuzzy element for performing fuzzy inference according to knowledge data and fuzzy rules. Further, on/off control output and analog control output are output to the signal processing section 3 via the output interface 9.

In such a conventional fuzzy sensor controller, data of membership functions of the antecedent part and the consequent part and fuzzy rules are given from the host computer 6 in the program mode. The signal processing section 3 once writes this data into the program memory 7 and ends the program mode. When the operation mode is reached, the membership function and fuzzy rule data held in the program memory 7 are transferred to the memory 8a of the fuzzy inference device 8, and then input data from the sensor obtained via the input interface 2 is read. , performs fuzzy inference based on the data and outputs a control signal from the output interface 9.

0004

However, in such a conventional fuzzy inference device, it is necessary to transfer knowledge data from the host computer 6 to the program memory 7 and store it before starting inference. However, if the power of the host computer 6 or the fuzzy inference device 1 itself is cut off for some reason while the knowledge data is being transferred, part of the knowledge data will not be recorded. In such cases as well, it was not possible to determine whether the knowledge data was stored normally. Therefore, there is a problem in that if fuzzy inference is performed as is, incorrect inference results will be obtained.

The present invention has been made in view of the problems of the conventional fuzzy inference device, and it has been made in view of the problems of the conventional fuzzy inference device. , the technical challenge is to be able to recognize that state.

[0006]

[Means for Solving the Problems] The present invention is a fuzzy inference device that performs fuzzy inference according to input and outputs an inference result, comprising a program memory consisting of a non-volatile memory for storing membership functions and fuzzy rules; ,
A fuzzy inference device to which membership functions and fuzzy rules in a program memory are transferred at the start of operation and performs fuzzy inference based on given feature data; and feature data transfer means to transfer input signals as feature data to the fuzzy inference device. , knowledge data writing means that receives membership functions and fuzzy rule data from an external device and writes them into the program memory, and sets a program in progress flag when the knowledge data writing means starts writing knowledge data, and also sets a flag during the program after writing is completed. The present invention is characterized by comprising a flag control means for resetting the flag, and a knowledge data writing interruption determining means for determining whether writing of knowledge data is interrupted based on the state of the program-in-progress flag after power is turned on.

[0007]

According to the present invention having such features, membership functions and fuzzy rules are read in advance from an external device and written into a program memory consisting of a non-volatile memory before starting fuzzy inference. At the start of this writing, a program-in-progress flag is set, and when the writing is finished, this flag is reset, so that it can be determined whether knowledge data is being transferred. After the power is turned on, it is determined whether the writing of knowledge data is interrupted based on the state of this flag, and if the writing is not interrupted, the feature data is transferred to the fuzzy inference machine to perform fuzzy inference.

[0008]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a block diagram showing the overall configuration of a fuzzy inference device 11 according to an embodiment of the present invention, and the same parts as those in the conventional example described above are given the same reference numerals and detailed explanations will be omitted. In this embodiment as well, inputs from on-off type sensors and analog sensors are provided to the signal processing section 12 via the input interface 2, which is an input section. The signal processing unit 12 is realized by a microcomputer,
Knowledge data writing means 14 for writing fuzzy inference knowledge data obtained from the host computer 6 into the program memory 7 in addition to the internal memory 13; and an input interface 2.
A feature data transfer means 15 that transfers a signal from a predetermined cycle as feature data to the fuzzy reasoner 8, a flag control means 16 that controls a program flag set when writing knowledge data, and a flag control means 16 that determines whether or not the writing of knowledge data is interrupted. Knowledge data writing interruption determination means 17 is provided. The rest of the configuration is the same as the conventional example described above, and a fuzzy inference device 8 is connected to the signal processing section 12, and an on/off signal or an analog control signal is outputted to the outside via an output interface 9. Further, an operation mode setting section 4 for setting an operation mode and a program memory 7 for storing knowledge data are connected to the signal processing section 12.

Next, FIG. 2 is a diagram showing a memory map of the microcomputer and program memory in the signal processing section 12. In FIG. 2A, the internal RAM 13a and the internal ROM 13b constitute the internal memory 13, and the external RAM constitutes the program memory 7. The program memory 7 stores the processing number as shown in FIG. 2(b).
0~No. It has two knowledge data areas, and each data area has the MS of the antecedent part and the consequent part as shown in the figure.
Areas are provided for F data, processing start address, fuzzy rule data, sum value storage area, and program flag. Other processing number No. 1, No. The same applies to area 2. This program memory 7 is constructed of a non-volatile memory so as to retain data even when the power is cut off, or is a non-volatile memory backed up by a battery.

Next, the operation of this embodiment will be explained using flowcharts shown in FIGS. 3 to 6. When the operation starts, first, in step 21 of FIG. 3, initialization processing such as initial processing of the hardware and initial processing of the internal RAM area is performed, and the process proceeds to step 22, where it is checked whether the program-in-progress flag is set. Since the program-in-progress flag is set while knowledge data from the host computer 6 is being written, if this flag is set, it is considered that the writing has been interrupted for some reason. Therefore, the process proceeds to step 23, where an LED blinking flag for blinking the LED indicating a failure is set (step 23), and the process ends. If the programming flag is not set, the program proceeds to step 24 to check the sum of the knowledge data in the program memory 7, and then proceeds to step 25 to determine whether there is an error. If there is an error, the error LED control flag is set in step 26 and the process is completed; if there is no error, the process proceeds to step 27 to permit timer interrupts and reception interrupts. Then, in steps 28 and 29 of FIG. 4, it is checked whether it is in the program mode, and if it is in the program mode, it is checked whether reception has been completed, and it waits for the completion of reception from the host computer 6. When the reception is completed, the presence or absence of an error is checked in step 30, and if there is no error, the command is analyzed in step 31. If the command is a write command, write processing is performed in routine 33, and if it is a read command, read processing is performed in routine 34. If there is a reception error, an error response is created in step 35, transmission processing is performed in step 36, the reception completion flag is reset (step 37), and step 2
Return to 8.

When the write processing routine 33 is started, first, in step 41 of FIG. 5, it is checked whether the data is the first data of the MSF of the antecedent part. If it is the first data, set the first address of program data storage and set the programming flag (steps 42, 43).
. If it is not the first data, these processes are not performed, and the process proceeds to step 44, where the program data is written into the program memory 7, and it is checked whether the writing has been performed normally. In the case of normal or abnormal termination, respective termination codes are set in the transmission buffer (steps 46, 47), and the process proceeds to step 48, where it is checked whether all writing up to the rule data has been completed. If writing of the rule data has not been completed, the process advances to step 49 to update the program storage address and returns to the transmission process; if writing has been completed, the sum value data is stored in the sum value area in step 50. , reset the programming flag and end the process. In this way, even when a large amount of knowledge data is transferred sequentially from the host computer 6 in block units, the knowledge data can be sequentially written into the program memory 7.

After the knowledge data is thus written in the program memory 7 in the program mode, the operation mode setting unit 4 sets the operation mode to the run mode. Then, proceed from step 28 to step 61 in FIG.
Check to see if you have just finished changing the mode. If the mode has just been changed, in step 62 the knowledge data held in the program memory 7, that is, membership functions and fuzzy rule data, are transferred to the fuzzy inferencer 8.
Transfer to. The process then proceeds to step 63 to read input from the sensor. When the reading of the sensor input is completed, the routine proceeds to routine 64, where feature data is calculated and generated from the read sensor input. Then, the process advances to step 65 and the feature data is transferred to the fuzzy inference unit 8. Then, inference activation processing is performed (step 66), and the process advances to step 67 to wait for completion of inference. When the fuzzy inference is completed, the process proceeds from step 67 to step 68 to permit reception and timer interrupts, and in step 69 a control signal is output from the output interface 9.

Here, in steps 44 to 50 of the write processing routine, the signal processing section 12
The knowledge data writing means 14 functions to write the knowledge data transferred from the program memory 7 into the program memory 7. In addition, the signal processing unit 12 achieves the function of the feature data transfer means 15 that reads input from the sensor to generate feature data and transfers it to the fuzzy inference device 8 in steps 63 to 65, and in steps 43 and 51, the data is transferred. This achieves the function of the flag control means 16, which controls the programming flag to be set only during writing. Further, the signal processing section 12 achieves the function of the knowledge data writing interruption determination means 17 which determines whether the writing of knowledge data is interrupted based on the state of the program-in-progress flag after the start of the operation in steps 22 and 23.

[0014]

Effects of the Invention As described above in detail, according to the present invention, when writing knowledge data from a host computer to a fuzzy inference device, a program in progress flag is set at the start of writing, and when the writing is completed, the flag is set. I am trying to reset the flag. Therefore, immediately after power is turned on, it can be determined based on the state of this flag whether writing of knowledge data is interrupted due to power cutoff. Therefore, fuzzy inference is not performed due to incorrect knowledge data, and the reliability of inference can be improved.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing the configuration of a fuzzy inference device according to an embodiment of the present invention.

FIG. 2 is a memory map showing the memory of this embodiment.

[Figure 3] Flowchart showing the operation of this embodiment (Part 1)
).

[Fig. 4] Flowchart showing the operation of this embodiment (Part 2)
).

[Figure 5] Flowchart showing the operation of this embodiment (part 3)
).

[Fig. 6] Flowchart showing the operation of this embodiment (Part 4)
).

FIG. 7 is a block diagram showing the configuration of a conventional fuzzy inference device.

[Explanation of symbols]

2 Input interface 4 Operation mode setting section 5 Communication interface 7 Program memory 8 Fuzzy reasoner 8a Memory 9 Output interface 11 Fuzzy inference device 12 Signal processing section 13 Internal memory 14 Knowledge data writing means 15 Feature data transfer means 16 Flag control means 17 Knowledge data writing interruption determination means

Claims (1)

[Claims] 1. A fuzzy inference device that performs fuzzy inference according to input and outputs an inference result, the program memory comprising a non-volatile memory for storing membership functions and fuzzy rules, and the program memory at the start of operation. A fuzzy inference device to which membership functions and fuzzy rules are transferred and performs fuzzy inference based on given feature data, feature data transfer means to transfer input signals as feature data to the fuzzy inference device, and an external device. knowledge data writing means for receiving membership functions and fuzzy rule data and writing them into the program memory; setting a flag during programming when the knowledge data writing means starts writing knowledge data; and setting the flag after the writing is completed; A fuzzy inference device comprising: a flag control means for resetting; and a knowledge data write interruption determining means for determining whether writing of knowledge data has been interrupted based on the state of the program-in-progress flag after power is turned on.