JPH0244592A - Magnetic recording and reproducing device - 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 the Invention The present invention relates to a magnetic recording/reproducing apparatus capable of managing the fI disturbance time of a rotating mechanism system.

Many conventional magnetic recording and reproducing apparatuses in the technical and commercial field have a 10-hour meter for the purpose of managing the usage time of the rotating gI@.

An example of an integrating time meter used in the conventional magnetic recording/reproducing apparatus described above will be described below with reference to the drawings. FIG. 4 shows the structure and causes of a cumulative time meter used in a conventional magnetic recording/reproducing device. In FIG. 4, numeral 41 is an electrolyte 10-hour meter, which integrates the time by moving the electrolyte by passing an electric current. 42 is a scale indicating the movement of the electrolyte.

43 is a resistor for limiting the current flowing to the electrolyte MW time meter 41.

The operation of the electrolyte integrating time meter configured as described above will be described below. When the device is powered on, a current determined by the resistor 43 flows, which causes the electrolyte solution integration time meter 4 to flow.
At this time, the electrolyte in the electrolyte 1 moves, and by selecting the resistance value of the resistor 41 in time for the predetermined scale valve to move, it is possible to accumulate between any FfF.

Problems to be Solved by the Invention However, with the above configuration, fluctuations in power supply voltage,
Due to variations in the value of the resistor 43, variations in the internal resistance of the electrolyte integrating time meter itself, measurement accuracy cannot be improved, and there are also problems in that it is not possible to actively warn of the passage of time.

The present invention solves the above-mentioned problems, and aims to provide a magnetic recording/reproducing device having an integrating time meter that can improve the accuracy of 81 brightness.

Means for Solving the Problems In order to solve the above problems, the present invention provides means such as a microcomputer for calculating time, and a non-volatile memory having three or more areas that maintains the accumulated chain when power is supplied. and a display section for displaying the read value, and the means for glancing the time writes the integrated value to three or more areas of the non-volatile memory at regular intervals, and re-powers the memory. At the time of input, the integrated value is read from three or more areas of the nonvolatile memory, the correct value of the read value is determined, and the time is integrated again from the correct value to obtain the integrated time. .

Effect With the above configuration, for example, a microcomputer can obtain clock-like accuracy, and the accuracy of the integrated value stored in the non-volatile memory can be improved by an algorithm using three or more areas of the non-volatile memory. It also becomes easier to set the time.

Example Hereinafter, one embodiment of the present invention will be described based on the drawings.

FIG. 1 shows a configuration diagram of a magnetic recording/reproducing apparatus according to an embodiment of the present invention. In FIG. 1, reference numeral 1 denotes a switch input section for setting an initial integration value and a warning time value in an integration time control section 2. As shown in FIG. 3 is a segment display unit that displays the data output from the integration time ff1l11 unit 2 in segments; 4 is a warning output unit that outputs a warning signal generated from the integration time control unit 2; and 5 is an integration unit within the integration time control unit 2. This is a non-volatile memory having areas A to C that hold stored values.

The integration time control section 2 includes an input decoding means 6 for decoding data from the switch input section 1, a clock generation means 7 serving as a reference for time integration, and a time integration valve means 8 for calculating W4p.
A display control means 9 for outputting segment data to the segment display section 3, a warning time setting means 10 for setting a warning time according to a signal from the input decoding means 6, and a time accumulation means 8.
A readout means 12 reads out the integrated value from the non-volatile memory 5 when the power is turned on and the integrated time control section 2 starts up, and a coincidence detection means 13 for comparing the value integrated by the calculation means 8 and the warning value set by the warning setting means 10; and a warning signal generation means 1 for generating a warning signal based on the coincidence output from the coincidence detection means 13.
4.

FIG. 2 is a circuit diagram showing an example of the specific circuit shown in FIG. 1. The stacking time control 12 is composed of a microcomputer 21 and peripheral circuits, and the microcomputer 21 shown here includes a CPU and a ROM.

It is a so-called one-chip microcomputer that has a RAM and an input/output section. The one-chip microcomputer 21 integrates the time as long as power is supplied, outputs the integrated value on the display v522, and writes the integrated value in the nonvolatile memory 23 at fixed time intervals. When the power is turned on, the power supply reset section 24 detects the rise of the power supply, performs a program reset, takes in the last data read from the nonvolatile memory 23, and continues 1g. Further, by inputting the Teiki initial value so as to start integration from an arbitrary value using the switch 25, or by setting a warning time value, a warning output can be taken out from the warning output section 26 when the warning time has elapsed.

Next, the operation of the 19-hour meter constructed as described above will be explained using the flowchart shown in FIG. After the microcomputer 21 receives a reset signal from the power supply reset section 24 and turns on the power, it starts integrating time according to the procedure of the W4 time counter program stored in the ROM and shown in the flowchart of FIG. 3. First, steps 31 and 32
．． At step 33, matching detection between areas A, B, and C in the nonvolatile memory is performed using an algorithm, and at step 34.35, it is determined whether to use the data of area A or the data of area B as the initial integration value. Next, in step 36, it is detected whether a certain period of time has elapsed, and if it has elapsed, the next step 3 is performed.
In step 7, the time is calculated by V4, and in steps 3g and 39.40, the integrated values are inserted into areas A, B, and C, respectively, and if the elapsed time has not elapsed, nothing is done.This process is repeated.

As described above, according to this embodiment, the microcomputer calculates the time m, the nonvolatile memory maintains the integrated value when power is supplied, and the display section displays the 81O value. In addition, the microcomputer writes the reconnaissance Q values into three areas of the non-volatile memory at regular intervals, and furthermore, when the power is turned on again, reads the gIH values from the three areas of the non-volatile memory, and confirms that the value read from these is correct. By determining the value using an algorithm and re-multiplying from this correct value, a very highly accurate pure time can be obtained. Moreover, the warning time can be easily set using the switch input section, and the output can be taken out at any time.

Effects of the Invention As described above, according to the present invention, the accuracy of the integrated value stored in the nonvolatile memory can be improved by using an algorithm using three or more areas of the nonvolatile memory, and the accuracy of the integrated value held in the nonvolatile memory can be improved by counting the time. Active warning is also possible.

[Brief explanation of the drawing]

FIG. 1 is a configuration diagram showing an embodiment of the present invention, the second concrete diagram is an integrated circuit diagram of this embodiment, FIG. 3 is a flowchart showing an example of a program for time integration, and FIG. 4 is a conventional time scale. 1... Switch input section, 2... Integral time control section, 3
...Segment display section, 4...Warning output section, 5...
- Nonvolatile memory, 7... Clock generation means, 8...
Time accumulation/stop means, 9... Display control means, 10... Warning time setting means, 11... Lagoon control means, 12...
- Readout control means, 13... Coincidence detection means, 14.
...Warning signal generating means, 21...Microcomputer. Agent Yoshihiro Morimoto Figure 2 Figure 1 Figure 4 side

Claims (1)

[Claims] 1. A means for integrating time, a non-volatile memory having three or more areas for retaining the integrated value when power is supplied, and a display section for displaying the integrated value; , writes the integrated value to three or more areas of the non-volatile memory at regular intervals, reads the integrated value from the three or more areas of the non-volatile memory when the power is turned on again, and writes the integrated value to three or more areas of the non-volatile memory. A magnetic recording/reproducing device configured to determine a correct value and then integrate the time again from the correct value to obtain an integrated time.