JPH01265392A - Start-up indicating lamp device - Google Patents

Abstract

PURPOSE:To indicate that the title device is gradually stabilized until the device is completely stabilized after a power source is turned on and to also indicate the passage of the start-up time by equipping the device with a start-up indicating lamp flickered by the output of an astable multivibrator to change its frequency according to the change of input voltage to a start-up signal circuit and the signal of the start-up signal circuit. CONSTITUTION:A start-up indicating lamp 3 is driven based on the output of a start-up signal circuit 1 to generate the signal during prescribed time after the power source is turned on and the output of an astable multivibrator 2 to change its frequency according to the change of the input voltage to the start-up signal circuit 1. Consequently, the start-up indicating lamp 3 flickers according to the vibrating state of the astable multivibrator 2, and the flickering frequency gradually changes. Thus, it can be indicated that a detecting device is gradually stabilized by the flickering frequency.

Description

[Detailed Description of the Invention] [Field of Industrial Application] The present invention provides a start-up display that displays the start-up time from when the power is turned on to when the alarm becomes possible in a detection device such as a gas leak alarm. Regarding lighting devices.

[Conventional technology]

Gas leak alarms generally include a power indicator light to indicate that the power is on, a warning light that lights up when a gas leak is detected, and a sounder to display an alarm. However, gas leak alarms require time after the power is turned on for the alarm to detect a gas leak and reach a state in which it can issue an alarm (herein referred to as normal operation). It may also sound. To prevent this, a delay circuit is provided to prevent the sounder from ringing, and in addition to the power indicator light, a start indicator light is also provided to keep the light on until the device returns to normal operation. There is.

Generally, the operation indicator light also functions as a start indicator light. Here, such an indicator light is referred to as a start indicator light. An example of a time chart of a conventional starting indicator light device is shown in FIG. In FIG. 3, when the power is turned on, the power indicator light and the start indicator light light up at the same time. When the gas leak alarm reaches normal operation after a predetermined time T, the start indicator light will turn off, and from then on, the start indicator light will return to its original vcit state only when the gas concentration around the alarm exceeds the detection level TJD.
Display the behavior as.

[Problem to be solved by the invention]

However, such a conventional start indicator light simply continues to light normally, and is easily mistaken for a power indicator light, and it is unclear when it will reach normal operation. Another drawback is that the sounder may be out of order and there may be a gas leak, which makes the user feel uneasy.

SUMMARY OF THE INVENTION Therefore, it is an object of the present invention to provide a start indicator light device that can display a detection device or the like until the device stabilizes after power is turned on, and can also display the elapse of the start time.

(Solving [11!] 1 Memory V stage) The present invention includes a starting signal circuit that generates a signal for a predetermined time after power is turned on, and an astable multivibrator whose frequency changes depending on the change in the input voltage to the starting signal circuit. and an operation indicator light that blinks based on the output of the multivibrator and a signal from the start signal circuit, and the start indicator light blinks at the frequency of the multivibrator while the signal from the start signal circuit is output. In addition, the blinking cycle is changed to display the elapsed starting time.

[Effect]

In the starting indicator lamp device according to the present invention, the output of a starting signal circuit that generates an open signal for a predetermined time after power is turned on, and the output of an astable multivibrator whose frequency changes with changes in input voltage of the starting signal circuit. By driving the starting indicator light based on the oscillation status of the astable multivibrator, the starting indicator light will blink according to the oscillation state of the astable multivibrator, and the blinking frequency of the same number will gradually change, and the detection device will gradually become stable. The flashing frequency causes water to fly.

〔Example〕

Next, one embodiment of the invention will be described in detail based on the drawings. FIG. 1 is a wiring diagram showing one embodiment of the present invention.
In the figure, the starting indicator light device includes a starting signal circuit 1, an astable multivibrator 2, and a starting indicator light 3.

The starting signal circuit 1 includes a differential amplifier 4, and the voltage of a DC power supply 9 is applied to this input terminal via a resistor 5, and this input terminal is fixed by a constant voltage diode 6. held at voltage. In addition, capacitor 7 and resistor 8 are connected to the input terminal.
A connection point of a circuit in which these are connected in series is connected, and this series circuit is connected to a DC power supply 9. The astable multivibrator 2 uses a differential amplifier 10, and has a resistor 11 connected between its output terminal and one input terminal. A series circuit of a resistor 12 and a diode 13 also connected between them, and a capacitor 14 connected between the input terminal and ground.
, a resistor 15 connected between the output terminal of the differential amplifier 10 and its input terminal, etc., and the connection point between the capacitor 7 and the resistor 8 of the starting signal circuit 1 is connected to the differential amplifier via the resistor 16. ] Connected to the ten input terminal of 0. The output end of the starting signal circuit 1 and the output end of the multivibrator 2 are connected in common and connected to the KR power supply 9 via a resistor 17.

Starting indicator light (here a light emitting diode is used) 3
is connected in series with the resistor 18, one end of the resistor 18 is connected to the DC power supply 9, and the other end, the cand side, is connected to the gas detection circuit 19 (not shown).
is connected to the gas leak detector to prevent malfunction during startup of this gas leak detector. An inverter I is connected between the output end of the multivibrator 2 and the canard side of the start indicator light 3. A series circuit of the resistor 21 and the light emitting diode n is a power indicator circuit connected to the DC power source 9. The power source 9 is a rectified commercial power source that drives the gas leak alarm, and operates as the DC power source 9 at the same time as the power source 11 for the alarm is turned on.

When the DC power supply 9 is applied to this starting indicator lamp R#, a constant voltage is applied to one input terminal of the differential amplifier 4 by the constant voltage diode 6, and a resistance due to the light tK current of the capacitor 7 is applied to the input terminal of the differential amplifier 4. A voltage across 8 is applied. Initially, the voltage across the resistor 8 is higher than the constant voltage at one input terminal of the differential amplifier IWA device 4, so the starting signal circuit 1 sends a high-level signal to its output terminal, and this high-level signal is transmitted to the resistor 80.
This continues until the voltage at both ends approaches the constant voltage at one input end.

In other words, it continues until the gas leak alarm reaches normal operation. The multivibrator 2 oscillates only when the signal voltage is output to the i-th circuit 1. Initially, when the voltage across the resistor 8 is high, it oscillates at a low frequency, and as this voltage decreases, it oscillates at a high frequency. When either output of the start signal circuit 1 or multivibrator 2 is at low level, the signal at the input end of the inverter is at low level, and only when both output signals are at high level, it becomes high level. Thus, the oscillation signal of the multivibrator 20) is applied to the cathode side of the indicator lamp 3 via the inverter m. Here, when the input to the inverter is at a high level, the output of the inverter Δ) is at a low level and the indicator light 3 shows 1! A stream flows and lights up. However, when the input to the inverter head is at a low level, the output from the inverter is at a high level, so the current to the indicator lamp 3 is blocked and the indicator lamp 3 does not light up. That is, the indicator lamp 3 blinks at the oscillation frequency of the multivibrator 2. This state is shown in a time chart as follows:
In Fig. 2, when the power source 9 is turned on, the power indicator light n and the start indicator light 3 light up at the same time, but the start indicator light 3 repeatedly blinks, and the number of blinks is small at first, but gradually increases, and the gas leak alarm is activated. When the inverter completes its starting and reaches normal operation, the signal of the starting signal circuit 1 becomes low level, and the output of the inverter becomes high level, so the starting indicator lamp 3 goes out.

This starting indicator light device is connected to a gas leak alarm, etc., and when gas is detected, the starting indicator light continues to light up like conventional devices to indicate a gas leak, but this explanation is omitted here. do.

〔effect〕

As described above, the start indicator light device according to the present invention is installed in a circuit that prevents a detection device such as a gas leak alarm from malfunctioning when the power is turned on, and the start indicator light device is installed in a circuit that prevents a detection device such as a gas leak alarm from malfunctioning when the power is turned on. The circuit sends out a signal, causes the astable multivibrator to oscillate, causes the start indicator light to blink, and then gradually changes the number of blinks to indicate that the detection device is gradually becoming stable. This provides the user with appropriate judgment and a sense of security.

[Brief explanation of the drawing]

ff11 is a wiring diagram showing an embodiment of the starting indicator light device according to the present invention, FIG. 2 is a time chart at the time of starting of FIG. 1, and FIG. 3 is a time chart of the conventional starting indicator light device. 1...Starting signal circuit, 2...Astable multi-pibre";-', ('knee 1)

Claims (1)

[Claims] 1) A starting signal circuit that generates a signal for a predetermined period of time after the power is turned on, an astable multivibrator whose frequency changes with changes in the input voltage to the starting signal circuit, and an output of the multivibrator and a signal from the starting signal circuit. A starting indicator light device comprising a blinking starting indicator light.