JPH01305720A - Time displaying light emitting device - Google Patents

Abstract

PURPOSE:To facilitate the grasp of the conductive time of an electric circuit and to simplify constitution by measuring the operating time of the electric circuit and flashing a lightemitting element by means of a pulse signal in one period, which corresponds to a measured value. CONSTITUTION:When an oscillator 8 in a control circuit 5 receives a driving voltage V from the electric circuit 3, it gives the clock signal of a prescribed period to a counter 7 and the counter 7 measures the number of operating hours of the circuit 3. The added value is given to a waveform generator 9, which operates the outputs of the counter 7 at every clock signal and allocates respective time widths of 'H' and 'L' to the pulse signal in one period. The generator 9 outputs a continuous pulse signal based on the pulse signal in one period. The pulse signal is given to the light-emitting element 4. At the time of 'H', the element 4 is lighted, and it is lighted out at the time of 'L'.

Description

DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Industrial Field of Application) The present invention relates to a time display light emitting device connected to a general electric circuit and for displaying the number of operating hours of this electric circuit.

(Prior Art) Conventionally, electric circuits have been used to control the operation of electric machines and the like. A timer is often used to measure the energization time of this electric circuit.

(Problems to be Solved by the Invention) However, the above-mentioned conventional device has a complicated structure and is expensive.

The present invention has been made to solve the above-mentioned problems, and an object of the present invention is to provide a time display light-emitting device that has a simple structure and displays the energization time of an electric circuit in such a manner that it can be easily grasped.

[Structure of the invention]

(Means for Solving the Problems) The features of the present invention for achieving the above object include an electric viewing circuit, and when this electric circuit is activated, it receives a voltage applied from the electric circuit and outputs a clock signal. an oscillator;
A counter that receives a clock signal from this oscillator and measures the number of operating hours of the electrical circuit, and stores the measured number of operating hours when the electrical circuit is not operating; The present invention includes a waveform generator that allocates high level and low level time widths to one cycle of pulse signals and continuously outputs this pulse signal, and a light emitting element that repeatedly blinks in response to this pulse signal.

(Function) With the above configuration, when the electric circuit operates, voltage is applied from the electric circuit to the oscillator, counter, and waveform generator. An oscillator starts oscillating when it receives voltage from an electrical circuit. The counter receives the clock signal from the oscillator and measures the number of operating hours of the electrical circuit. This number of hours is simultaneously output to the waveform generator. The waveform generator allocates time widths of H level and L level within one cycle of the pulse signal according to the number of changing times. This one-cycle pulse signal is continuously output to cause the light emitting element to blink. Since the time width between the lighting time and the light-off time differs depending on the total number of operating hours of the electric circuit, the number of operating hours can be easily grasped from the display.

When the electrical circuit is inactive, no clock signal is output from the oscillator and the counter stores a total of +111 Jt, the number of operating hours.

(Example) Examples of the present invention will be described below based on the drawings. First, FIG. 1 shows an embodiment of a time display light emitting device according to the present invention. This time display light emitting device 1 is attached to an electric circuit 3 of a control system of a general electric machine 2. The time display light emitting device 1 consists of a light emitting element 4 and an integrated control circuit 5. This light emitting element 4
and the control circuit 5 are housed in a case 6 as shown in FIG. Counter 7 and oscillator 8 in control circuit 5
, the waveform generator 9, and the DC power supply section 7a receive the drive voltage V from the electric circuit 3 when the electric circuit 3 is activated.

A battery and a switch are attached to the DC power supply section 7a, and when the electric circuit 3 becomes inactive, the switch is activated and a DC voltage is applied to the counter 7. When the oscillator 8 receives the drive voltage VI from the electric circuit 3, it supplies a clock signal with a predetermined period to the counter 7. The counter 7 starts measuring in response to the clock signal output from the oscillator 8. That is, measurement of the number of hours during which the electric circuit 3 operates is started. The binary numbers added by the counter 7 are simultaneously output to the waveform generator 9. Each time the waveform generator 9 receives the clock signal from the oscillator 8, it calculates the 16-bit binary number transmitted from the counter 7, and allocates each time width of the H level and L level to one cycle of the pulse signal. .

The waveform generator 9 further outputs a continuous pulse signal based on one cycle of the pulse signal. This pulse signal is applied to the light emitting element 4, and when the pulse signal is at the H level, the light emitting element 4 is turned on, and when it is at the L level, the light emitting element 4 is turned off, thereby blinking the light emitting element 4. When the operation of the electric circuit 3 is stopped, a switch in the DC power supply section 7a is activated, and the DC voltage of the battery is applied to the counter 7 in order to memorize the number of hours not counted by the counter 7.

Next, the waveform generator 9 outputs a continuous pulse signal every time it receives a clock signal from the oscillator 8, and the light emitting element 4
A specific example of blinking will be explained.

First, it is assumed that the oscillator 8 outputs a clock signal with a period of 1 hour, and the counter 7 has 16 bits, so the maximum measurement time of the counter 7 is 6 if expressed in binary coded decimal notation.
It takes 5535 hours. That is, it is about 7 years, and the number of operating hours of the electric circuit 3 can be measured for a maximum of 7 years.

Here, the maximum: 1-DI time number t-65535 hours, the arbitrary number of time measured by the counter 7 in the total of 7 IpJ is set as tu, and the waveform generator 9 calculates 1-1. -tH calculation is performed. Needless to say, tH is the remaining measurement time that can be measured by the counter 7. Furthermore, the waveform generator 9 performs tab and tab calculations. That is, ta/l is assigned to the H level and tab is assigned to the L level for one period of the pulse signal.

For example, if the contents of the counter 7 measure the number of measurement hours tu = 26280 hours (3 years) at an arbitrary point in time, then ta = 65535-26280-39255 hours, and ta/l-0,599...・・・・・・(1) tu/
l-0,401-=・(2).

If one period of the pulse signal formed by the waveform generator is one second, then from the above results, 0.599 seconds are allocated to the H level and 0.401 seconds to the L level. Furthermore, the waveform generator 9 continuously outputs this one-cycle pulse signal to the light emitting element 4. The light emitting element 4 receives continuous pulse signals, lights up for 0.599 seconds, and lights up for 0.401 seconds.
It flashes by going off for seconds. This blinking state corresponds to the "3 year operation" pulse signal of the electric circuit 3 shown in FIG.

In the above equations (1) and (2), as the number of hours tu measured by the counter 7 becomes longer, the off time becomes shorter, and the on time becomes longer accordingly.

This blinking state corresponds to "6 years of operation" shown in FIG.

Conversely, when the measurement time number tu is short, the light-off time becomes long. This blinking state corresponds to "one year of operation" shown in FIG.

Note that in equation (1) and equation (2), 0. When 599 seconds is the light-off time and 0.401 seconds is the light-on time, it is clear that as the total Δ-j time of the counter 7 increases, the light-off time becomes longer and the light-on time becomes shorter.

As described above, the lighting time and the light-off time of the light-emitting cord 4 change depending on the number of operating hours of the electric circuit 3. For example, each time the number of operating hours of the electric circuit 3 becomes longer, the light-off time becomes shorter. Then, by displaying the state in which the lighting time becomes longer in a table and having the operator check the time interval of the blinking time, the total number of operating hours of the electric circuit 3 can be easily grasped using a simple device.

In the above embodiment, the period of the clock signal from the oscillator 8 is set to 1
However, it is not limited to this, for example,
It may be 10 seconds, 30 seconds, or 10 minutes.

In the above embodiment, the period of the continuous pulse signal for blinking the light emitting element 4 was set to 1 second, but the period is not limited to this, and may be 2 seconds or 3 seconds as long as the period can be visually confirmed.

The number of hours measured by the counter 7 may be cleared when the power supply from the electric circuit 3 is stopped.

By using the time display light emitting device 1 as described above, it is possible to prevent the electric machine 2 from exceeding its durability time in advance. Further, the operator can easily know when to replace the electric machine 2, and when the electric machine 2 breaks down, the operator can understand the relationship between the cause and the operating time. Also,
If you attach this device to the signal line of your computer system,
Workers can understand the access frequency of peripheral devices. Furthermore, the time display light emitting device 1 can also be used for a conventional "power on" display. This makes the device of the present invention highly versatile.

〔Effect of the invention〕

From the above, the time display light emitting device of the present invention applies voltage to the oscillator to cause the oscillator to oscillate when the electric circuit is in operation, and the counter measures the number of operating hours of the electric circuit by receiving a clock signal from the oscillator. At the same time, the counter outputs the number of measured hours to the waveform generator, and the waveform generator allocates the on-time and off-time for blinking the light emitting element to one cycle of pulse signals according to the number of measured hours. Since it continuously outputs a periodic pulse signal to make the light emitting element blink,
The number of operating hours of electrical circuits used in electrical machines can be easily determined based on the different times of on and off times, and the simple structure eliminates the need for conventional complicated and expensive timers. Therefore, it is possible to realize a highly versatile time display light emitting device that can be used in a wide range of applications.

[Brief explanation of the drawing]

Fig. 1 is a circuit configuration diagram showing an embodiment of the time display light emitting device of the present invention, Fig. 2 is an outline diagram showing the external shape of the time display light emitting device, and Fig. 3 is a time chart showing continuous pulse signals. . 1... Time display light emitting device, 3... Electric circuit, 4...
・Light emitting element, 7... Counter, 8... Oscillator, 9.
...Waveform generator. Applicant's agent Mr. Sato -Yu-10 Figure 2

Claims (1)

[Claims] an electric circuit; an oscillator that outputs a clock signal in response to a voltage applied from the electric circuit when the electric circuit is in operation; and a clock signal from the oscillator to measure the number of operating hours of the electric circuit. and a counter that stores the number of operating hours measured when the electric circuit is inactive, and a time width of a high level and a low level is assigned to one cycle of pulse signals according to the number of hours measured by the counter. A time display light emitting device comprising: a waveform generator that continuously outputs the pulse signal; and a light emitting element that repeatedly blinks in response to the pulse signal.