JPH09126822A - Measuring apparatus - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong the recording time up to the capacity of a recording medium regardless of the memory capacity in a measuring apparatus by storing data in a format which can be processed by a computer, in a recording medium connected with the internal or/and external circuit of the measuring apparatus simultaneously with the recording of measurement data. SOLUTION: Measurement data subjected to peak detection and compression at a specified compression rate is stored sequentially in a circulation memory 7A constituting a peak data memory. The compressed data stored in the memory 7A is passed through a small computer system interface 19 and recorded directly on the magnetoelectric recorder 23 in an external apparatus or a recording medium, e.g. a magnetoelectric disc 24. At the time of recording a measurement data having a relatively small physical variation quantity, e.g. temperature, the data stored in a butter memory 5A us not stored in the circulation memory 7A but passed through the interface 19 or the like and recorded directly on the magnetoelectric disc 24 in the recorder 23 simultaneously with data recording thus realizing long time recording.

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a measuring device,
In particular, the present invention relates to a measuring device configured to convert digitally measured data and peak-detected measured data into a format that can be processed by a computer and directly store the converted data in a recording means.

[0002]

2. Description of the Related Art Conventionally, a thermal head recorder configured to digitize analog inputs such as current, voltage, distortion, temperature, etc., perform high-speed sampling and display them on a screen of a display device, and print a data waveform on a printer. Such measuring devices are generally widely used.

In the above-mentioned thermal head recorder, when data is recorded such that it is displayed on the screen of the display device and the printer prints the data waveform, the digitally measured data is stored in a buffer memory or the like and stored in this buffer memory. A computer built in the measuring device (hereinafter referred to as CPU) converts the data into a predetermined format, reads it from the buffer memory, supplies it to a display device or printer, and further displays it on the screen of the display device. Japanese Patent Publication No. 5-59368 discloses a measuring device in which data is converted into dot data for an image and stored in a circulating memory at a constant sampling number or at a constant time and is displayed on a screen of a display device. There is.

A functional block diagram of the measuring device shown in the above publication has a structure as shown in FIG. In FIG. 5, an analog input signal such as current or voltage is supplied to the input terminal T ₁ ,
These analog input signals are converted into digital data by an analog-digital conversion circuit (ADC) 3A. This digital data is supplied to the dot data input processing means 31. In the dot data input processing means 31, the display unit 1
Addresses corresponding to the dot matrix screen displayed on the screen No. 3 are assigned to create dot data in which writing and reading addresses are cyclically configured.

The dot data created by the dot data input processing means 31 described above is supplied to the circulating memory 7A, and the dot data is displayed on the display unit 13 from the circulating memory 7A via the dot data output processing means 32. ing. The operation unit 15 has a screen return instruction means 15A for returning to the previously displayed screen, and outputs the output of the circulation memory 7A via the return screen output means 33 in order to return the addresses from the circulation memory 7A to the reverse time series. It is configured to be supplied to the display unit 13.

Further, although not shown, R normally possessed by the CPU
The data to be measured once stored in the AM or the like is read out from the RAM and output to the printer or the display device again.

[0007]

According to the measuring device such as the thermal dot recorder as described above, since it is stored as dot data, that is, image data in the circulating memory, it can be used for display and recording / printing. It cannot be analyzed as ordinary digital data. Since the data to be measured is digitized, the data to be measured is written in the RAM or the like normally possessed by the CPU, then read again, converted into a predetermined data format and supplied to the printer or the display device. In the case of the above built-in, there is a problem that measurement can be performed only within the storage capacity of the RAM for CPU.

Further, after the measurement is completed, the CPU reads the measurement data from the storage means such as RAM, converts it into a predetermined format based on predetermined firmware, and outputs it to a recording device such as a printer or a floppy disk. There was a problem that took time.

Further, in the case of data to be measured which must be recorded at high speed, the sampling frequency at the time of analog-digital conversion must of course be increased, and there is a problem that the amount of recorded data of the data to be measured increases accordingly. .

The present invention is made to solve the above-mentioned problems, and the problem is that the recording medium of the recording device connected to the inside or the outside of the measuring device at the same time as the recording of the measured data. Since the measured data is directly supplied to the measurement device, the recording time can be extended up to the capacity of the recording medium of the recording device without being affected by the memory capacity in the measuring device, and the measured data stored in the recording medium can be extended. By converting the data into a general-purpose format such as DOS that can be handled by the host computer of the personal computer and recording the data, a file having excellent compatibility with the host computer can be configured. Further, by performing peak detection recording, it is possible to obtain a measuring device capable of recording a large amount of data without losing the singular point of the measured data.

[0011]

The measuring device of the present invention, as an example thereof is shown in FIG. 1, digitally converts measured data such as the amount of physical change and stores it in the storage means 5A. Measuring device 2 adapted to record the output data of means 5A
In 1, the measurement device 21 simultaneously with the recording of the measured data.
The measuring device is characterized in that the data is directly stored in a recording medium 24 connected internally or / and externally in a format that can be handled by a computer.

Furthermore, another measuring apparatus of the present invention is a measuring apparatus 21 configured to perform peak detection recording of measured data such as a physical change amount, and at the same time as peak detection recording, inside or / and of the measuring apparatus 21. The measuring device is characterized in that the peak detection data is directly stored in a computer-readable format in a recording medium 24 connected to the outside.

According to the first aspect of the present invention, the recording time can be extended to the capacity of the recording medium regardless of the memory capacity in the measuring device. In particular, it is possible to obtain a measuring device suitable for recording data for which the measured data has a small change amount such as temperature for a long time.

Furthermore, according to the second aspect of the present invention, the peak value of the measured data is detected by the peak detection means and then the data compressed by the compression means is recorded inside the measuring device at the same time as the recording of the measured data. Since it is configured to be directly transferred to / and / or an external recording device, it is possible to obtain a measuring device capable of recording a large amount of measured data without losing the singular point of the measured data.

[0015]

BEST MODE FOR CARRYING OUT THE INVENTION A thermal head recorder for digitally converting an analog amount such as current, voltage, temperature or the like and recording data by a printer will be described below as a measuring device of the present invention.

FIG. 1 is a functional block diagram showing an embodiment of the measuring device of the present invention, FIG. 2 is an overall block diagram showing an embodiment of the measuring device of the present invention, and FIG. 3 is a recorded waveform of peak detection data. FIG. 4 is an explanatory diagram of the filing function.

First, the functional block diagram of FIG. 1 of the present invention will be described. The voltage of the measured data is input to the input terminal T ₁ ,
An analog signal having a relatively large physical change amount such as current and an analog signal having a relatively small physical change amount such as temperature are supplied, amplified by the analog amplifier 2A, and then amplified by the analog amplifier 2A. The analog-to-digital conversion circuit (ADC) 3A converts the digital data.

The data converted into digital data by the ADC 3A is stored in the buffer memory 5A by the write controller 14 including a CPU and a memory controller, which will be described later. The peak value of the data read from the buffer memory 5A or the output data from the ADC 3A is detected by the peak detection circuit 6A, and the compressed data taken out at a predetermined compression rate via the compression circuit 34 is passed through the printer controller 8A. The measured data waveform is output to the printer 9A and recorded on the recording paper 10A.

The measured data compressed in the peak detection and the predetermined compression ratio of this example is sequentially stored in the circulating memory 7A constituting the peak data memory.

The compressed data stored in the circulating memory 7A is a SCSI (Small Computer System Interface) 1
9. Directly transfer the measured data to a recording medium such as a magneto-optical recording device 23 of an external device, a magneto-optical disk 24 of an HDD or an HD (hard disk) via an IDE (Intergrated Device Electonics) which is an interface for a HDD (hard disk). To record.

Further, in recording data having a relatively slow physical change such as temperature as the data to be measured, the data stored in the buffer memory 5A is used as the SCSI interface 1.
The data is directly recorded on the magneto-optical disk (MO) 24 in the magneto-optical recording device 23 at the same time as the data recording via 9 or the like.

In this example, at the same time as recording the measured data, the data is recorded on the recording medium (MO, H) of an external or internal recording drive device.
Since continuous recording (filing) is performed on (D etc.), it is possible to record for a long time. Further, the recording time can be extended to the capacity of the recording medium of the recording device without being influenced by the memory capacity in the measuring device. Furthermore, data can be converted to general-purpose MS-DO.
By recording as a format file format such as S, a file with good compatibility with a personal computer can be constructed at low cost.

[0023]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A thermal head recorder 21 as a measuring device of the present invention will be described below with reference to FIGS.

In FIG. 2, input terminals T _{1 to} T _n represent the input terminals of the thermal head recorder 21 of this example, and analog signals of analog physical changes such as current, voltage, temperature, and distortion amount are inputted. It is supplied to these input terminals T _{1 to} T _n .
These analog signals are, for example, a plurality of analog signals of 1 channel ... K channel ... N channels, and these analog signals are supplied to the analog amplifiers 2A to 2N.

The analog signals amplified by the analog amplifiers 2A to 2N are supplied to the first to nth analog-digital conversion circuits (ADC) 3A to 3N.

The measured data digitally converted by the first to nth ADCs 3A to 3N are stored in the first to nth buffer memories 5A to 5N via the first to nth memory controllers 4A to 4N. .

Further, the memory controllers 4A to 4N supply the data from the buffer memories 5A to 5N to the peak detection circuits 6A to 6N.

The peak detection circuit 6A extracts the maximum and minimum values of all the data in a certain section from the high-speed sampled data of the measured data and compresses the peak value at a predetermined compression rate to the circulating memories 7A to 7N. The data is recorded and output to the printer 9A via the printer controllers 8A to 8N, and the recording paper 10A of the printer 9A is recorded.
The analog waveforms of the first to nth channels are output and recorded.

A microcomputer (CPU) 14 constituting a write control unit has an ordinary work RAM 12 and ROM 11 and an operation unit 15 having a keyboard and the like. Further, an interface connectable to the display unit 13 such as EL and the terminal device is connected via the bus 17 of the CPU 10 to control the memory controllers 4A to 4N, the peak detection circuits 6A to 6N, and the circulating memories 7A to 7N.

That is, the GP for the general RS-232C interface 18, SCSI 19, floppy disk interface 20 and measuring instrument system.
The IB interface 16 etc. is connected to the bus 17.

GP-IB interface 16 and RS-
Various terminals and a personal computer 22 are connected to the 232C interface 18 via a communication line, and measured data to be monitored is displayed on the screen of a display unit such as a CRT of the personal computer 22. Further, the transfer data is recorded on a recording medium such as the recording paper 10A of the printer built in the personal computer 22 or the floppy disk 26.

Further, the SCSI 19 is connected to the magneto-optical disk drive device 23 and the optical disk drive device via the SCSI bus. For example, a magneto-optical disk (MO) 24 is inserted in the magneto-optical disk drive device 23. Similarly, the floppy disk interface 20 is connected to a floppy disk drive device 25 via a data bus, and a floppy disk (FD) 26 as a recording medium is inserted in the floppy disk drive device 25. The measured data is recorded on the recording paper 10A, MO 24, and FD 26 described above.

In the above configuration, depending on the ADCs 3A to 3N,
The digital-converted parallel data is supplied to the peak detection circuits 6A to 6N via the memory controllers 4A to 4N, and the compressed peak values are circulated in the circulating memory 7A to.
Since it is stored in 7N, the amount of data to be measured can be reduced.

That is, as shown in FIG. 3A, the measured data waveform 40 is sampled at a high speed in the peak detection circuits 6A to 6N to obtain a peak detection point 41, and when the data is recorded, it is circulated through the compression means 34. The sampling speed at the time of recording in the memories 7A to 7N is determined separately. The waveform 42 in FIG. 3B is for the case where the compression rate is 1/4 and the waveform 44 in FIG. 3C is for the case where the compression rate is 1/8. If the sampling speed is increased, the maximum / minimum value of the measured data can be reliably acquired at the peak data recording point 43, and the data is stored in the circulating memories 7A to 7N without losing the singular point of the measured data. It becomes possible to do.

For example, when the peak sampling detection period during recording of measured data is fixed at 5 μs, the sampling period during recording of peak data is 10 ms to 100 S.
If the recording data is compressed and acquired after being selected to some extent, the peak data to be printed on the printer 9A and the amount of data handled by the external magneto-optical recording device 23 or the like via the communication line can be reduced. In other words, by compressing the amount of data to the necessary and sufficient range while leaving the singularity of the measured data, it is possible to record data for a longer time with the same recording capacity, so the cost of data storage and management is reduced. It can be reduced.

The peak detection circuits 6A to 6N sample and extract the maximum and minimum values in the measured data and record the representative values (peak values). The compression circuit 34 uses the peaks from the buffer memories 5A to 5N. Detection circuit 6
The CPU 14 determines the ratio of the reading speed when the peak detection circuits 6A to 6N store the cyclic memories 7A to 7N to the reading (supply) speed of the data supplied to the A to 6N.
Can control an appropriate compression ratio.

FIG. 4 shows that the peak data detected by the peak detection circuits 6A to 6N stored in the above-mentioned circulating memories 7A to 7N are supplied to the magneto-optical recording devices 23A to 23N via the SCSI 19 simultaneously with the recording of the measured data. It shows a mode in which measured data is sequentially transferred to a plurality of magneto-optical disks 24A to 24N.

The SCSI bus 36 has a daisy chain configuration, and a maximum of 8 CPUs and peripheral devices (magneto-optical recording device in this case) can be connected on the bus, and communication between peripheral devices can be performed without intervention of a host computer. It has a function that can be performed, a function that one peripheral device can disconnect the SCSI bus during command execution, and another peripheral device can use the SCSI bus during that time.

The above-mentioned magneto-optical disk 24A is 230 MB.
Assuming that the recording capacity is 24 hours, when peak data for 24 channels is filed with a recording period of 1S, continuous recording is possible for about 650 hours. A file is a host computer (H-CPU) such as a personal computer 22 connected as an external device.
It is possible to record in a general-purpose format such as MS-DOS to which is applicable. In this way, it is possible to obtain the data which can directly measure and analyze a large amount of data directly recorded on the recording medium 24A to 24N such as MO by a personal computer or the like. Further, the data of the recording media 24A to 24N can be transferred to and from another personal computer 38 via the modem 37 offline as shown in FIG.

Further, the measured data having a small amount of physical change such as temperature is peak detection circuits 6A to 6N and circulating memory 7A to.
The F inserted into the FDD 25 via the FDC 20 of the internal recording device under the control of the CPU 14 when the data is stored in the buffer memory 5A without being stored in the 7N.
It is also possible to directly record measured data with a small physical change amount (long change time) without peak detection in D26 or MOD23 of an external device.

[0041]

According to the present invention, the MOD23 simultaneously records the measured data digitally converted by the ADCs 3A to 3N.
Since the data is written to the MO 24 as a file in a general-purpose format, the recording time can be extended up to the recording capacity of the MO 24 such as the MOD 23 without being affected by the memory capacity built in the measuring device, and the general-purpose format can be used. H-C of a normal personal computer by using the file format
A recording medium that can be easily handled by a PU can be obtained.

Further, since the measured data whose peaks have been detected are directly recorded in the memory of the external device and stored at the same time, it is possible to obtain a measuring device capable of greatly extending the recording time.

[Brief description of the drawings]

FIG. 1 is a functional block diagram of a measuring device of the present invention.

FIG. 2 is a block diagram showing an embodiment of a measuring device of the present invention.

FIG. 3 is an explanatory diagram of recorded waveforms of peak detection data of the measuring device of the present invention.

FIG. 4 is an explanatory diagram of a filing function of the measuring device of the present invention.

FIG. 5 is a functional block diagram of a conventional measuring device.

[Explanation of symbols]

 5A to 5N buffer memory 6A to 6N peak detection circuit 7A to 7N circulating memory (peak data memory) 9A printer 14 writing control unit (CPU) 22 personal computer (H-CPU) 34 compression circuit

Claims (2)

[Claims] 1. A measuring device configured to digitally convert measured data such as an amount of physical change, store the data in a storage means, and record output data of the storage means at the same time as recording the measured data. A measuring device, wherein the data is directly stored in a recording medium connected to the inside or outside of the measuring device in a format that can be handled by a computer. 2. A measuring device configured to perform peak detection recording of measured data such as an amount of physical change, simultaneously with the peak detection recording, and / or inside the measuring device.
And a measuring device characterized in that the peak detection data is directly stored in a computer-readable format on a recording medium connected to the outside.