JPS59211192A - Emergency flash - 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 The present invention relates to an emergency flashing device using a flash discharge lamp.

Recently, the voltage of the emergency battery power source has been boosted to about 300V DC voltage, and the capacitor charged by this boosted voltage is charged with a flash discharge lamp at predetermined intervals of about 0.5 to 3 seconds.
For example, an emergency flashing device has been put into practical use that is used to notify a user of an emergency by causing a xenon lamp to repeatedly and rapidly discharge to cause a flash discharge lamp to emit light intermittently, or as a guide light in an emergency.

This device has high brightness and has a strong ability to attract attention (and has good luminous efficiency; however, the flash discharge lamp used in this device has a relatively high emission starting voltage of about 200 μm, for example). Therefore, when the voltage of the battery power source decreases, a trigger pulse is supplied to the flash discharge lamp before the capacitor is charged to the charging voltage or the emission start voltage, causing the flash discharge lamp to not blink properly. was there.

This invention has been made to solve the above problems. That is, the present invention includes a relaxation oscillation circuit that is operated by a battery power source and whose oscillation period becomes longer as the voltage of the battery power source decreases, and a high voltage oscillation circuit that generates a high voltage trigger pulse in synchronization with the oscillation output of this relaxation oscillation circuit. A trigger pulse generation circuit is provided, and the trigger pole of the flash discharge lamp is controlled by the output pulse of this high-voltage trigger pulse generation circuit, and as the voltage of the battery power supply decreases, the light emission period of the flash discharge lamp is lengthened, and power is supplied to the flash discharge lamp. The present invention will be described in detail with reference to the drawings.

FIG. 1 is a circuit diagram of a device according to an embodiment of the present invention. In the figure, 1 is a commercial frequency AC power source, 2 is a charging circuit connected to this commercial frequency AC power source 1, and 3 is this charging circuit 2.
This is a secondary battery that is connected to the output side of the battery and is normally charged. The output side of this secondary battery 2 is connected between input terminals 44' to an inverter circuit 7 via a contact 6 of a relay 5 into which, for example, a fire alarm output signal is introduced.
An electrolytic capacitor 9 is connected to the output side of the circuit through a rectifying diode 8.

Further, a flash discharge lamp 10 is connected in parallel to the electrolytic capacitor 9 indicated in "-", and a high-voltage trigger pulse generating circuit 1 is connected in parallel.
1 is connected. This high voltage tri-force pulse generation circuit 1
1 is a resistor 21. Thyristor 22. It is composed of a capacitor 23 and a pulse transformer 24, and the electric charge of the capacitor 23 charged through the resistor 21 is transferred to the thyristor 22.
Several KV is applied to the secondary winding of the pulse transformer 24 connected in series with the trigger pole 12 by rapidly discharging the voltage through the trigger pole 12.
Generates high-voltage pulses of approximately

Further, the output of the secondary battery 3 is supplied to a relaxation oscillation circuit 13 via a contact 6 of a relay 5.

This relaxation oscillation circuit 13 includes a resistor 31 . connected in parallel to the secondary battery 3 via a relay contact 6 . A series circuit of capacitor 32 and resistors 33, 34 . It consists of a series circuit of a constant voltage diode 35, and a programmable unijunction transistor 36 whose anode electrode is connected to the connection point between the resistor 31 and the capacitor 32, and whose gate electrode is connected to the connection point between the resistors 33 and 34. The cathode electrode of the programmable unijunction transistor 36 is connected to the gate electrode of the thyristor 22 via a resistor 37. Note that 25 is the gate resistance of the Cyrisk 22.

Next, the operation of the circuit shown in FIG. 1 will be explained with reference to the operation waveform diagrams shown in FIGS. 2 to 6.

For example, when the relay 5 is activated by a fire detector output signal, the contact 6 is closed and the DC voltage VDC of the emergency secondary battery 3 is transferred to the inverter circuit 7 and the relaxation oscillation circuit 13.
is applied to Inverter circuit 7 boosts battery voltage VDC, and this boosted voltage is rectified by diode 8 and charged into capacitor 9 .

On the other hand, when DC voltage VDC is applied from the secondary battery 3 to the relaxation oscillation circuit 13 via the contact 6, the potential VG at the connection point between the resistors 33 and 34 is set to a constant voltage VG by the constant voltage diode 35. Further, the capacitor 32 is charged through the resistor 31. When the voltage VA across this capacitor 32 exceeds VG at the gate of the programmable unijunction transistor 36, the programmable unijunction transistor 36 becomes conductive, and a gate signal is applied to the thyristor 22 of the high voltage trigger pulse generation circuit 11, making the thyristor 22 conductive. do.

In addition, the rectified output of the diode 8 causes the capacitor 23 to
is charged through the resistor 21, and as the thyristor 22 becomes conductive as described above, the charge in the capacitor 23 is discharged through the closed circuit path of the primary winding of the pulse transformer 24, the capacitor 23, and the thyristor 22. is,
As a result, a high voltage pulse is generated in the secondary winding of the pulse transformer 24, which triggers the trigger pole 12 of the flash discharge lamp 10. Therefore, the charge in the capacitor 9 is discharged through the flash discharge lamp 10, and the flash discharge lamp 10 emits light.

Here, the charging voltage of the capacitor 9 and the voltage value of the secondary battery 3 V
Considering the DC relationship, the charging speed v to the capacitor 9
As shown in FIG. 2, c becomes slower as the battery voltage VDC decreases. Therefore, as in the conventional flash discharge lamp 1
0 at fixed time intervals and the charging voltage VC charged to the capacitor 9 during the fixed time is the third
As shown by the solid line a in the figure, the battery voltage VDC decreases as the battery voltage VDC decreases, and when the battery voltage is below DCO, the capacitor charging voltage C becomes below the minimum light emission starting voltage VS of the flash discharge lamp 10, as shown by the chain line C. In contrast, in the circuit configuration of the embodiment of the present invention shown in FIG. The light emission period T is set by the relaxation oscillation circuit 13 so that it becomes longer as the battery voltage VDC decreases.

That is, for example, as shown in Figure 4, the battery voltage or VD
When the voltage drops from CI to VDC2, the gate voltage VC of the programmable unichanction transistor 36 or the constant voltage field diode 35 both maintain approximately the same voltage value V.
G1. VG2, whereas the anode voltage VA is V
Changes from AL to VA2. Therefore, the anode voltage 3
When EVA exceeds the gate voltage VG, the period in which the programmable unichanction transistor 36 becomes conductive changes from tl to t2, and as a result, the high voltage trigger pulse generation circuit 1
The period of the tri-force signal output from 1 also increases from tl to t2, and the light emission period of the flash discharge lamp 10 changes from tl to t2.

In this way, when the battery voltage decreases from VDCI to VDC2, the light emission period of the flash discharge lamp 10 changes from tl to t2.
Due to the charging characteristics of the capacitor 32, as shown in FIG. When the battery voltage VDC is below this point, the light emission period changes as the battery voltage drops.

Furthermore, due to the change in the light emission period in response to the change in battery voltage, the charging voltage characteristics of the capacitor 9 change from VCI to VC2 when the battery voltage changes from VDC1 to VDC2, as shown in FIG. However, the charging voltage VC of the capacitor 9 does not decrease much. As a result, the charging voltage of the capacitor 9 changes as shown by iQb in FIG. 3, and the charging voltage of the capacitor 9 is always charged to the minimum light emission starting point v3 2)! This ensures that the flash discharge lamp will continue to emit light when the battery voltage drops.

As mentioned above, the present invention is based on a relaxation oscillation circuit in which the oscillation quantity becomes weaker as the power of the battery power source decreases, and one or two relaxation oscillation circuits.
Equipped with a high-voltage trigger pulse generating circuit that generates a high JE l-1,1 g pulse in synchronization with the oscillation output of the Tatsu circuit, the trigger pole of the flash discharge lamp is generated by the output pulse of the Takasho trigger pulse generating L tor circuit. The capacitor 4J that supplies power to the 11 flash lamps is
* is always charged to the minimum light emission starting voltage jFl;J-hi of the flash discharge lamp, and the flash light discharge lamp is guaranteed to emit light when the voltage of the battery power supply decreases.

Therefore, it is possible to provide an excellent and highly reliable emergency evacuation device, which is of practical use.

[Brief explanation of drawings]

FIG. 1 is a circuit showing the configuration of an embodiment of the present invention;
The figure shows the relationship between battery voltage and capacitor charging speed, Figure 3 shows the relationship between battery voltage and HUNDEN-IJ. Figure 5 is a diagram of the relationship between battery voltage and light emitting period, and Figure 6 is a diagram of charging voltage characteristics of a capacitor.
, 10-flash discharge lamp, 11-high voltage trigger pulse generation circuit, 12-trigger pole, 13H Yabari oscillation circuit. Applicant Kuroi Electric Co., Ltd. Agent Patent Attorney Hisao Komori 10 ″

Claims (1)

[Claims] (1) A battery power supply, a flash discharge lamp connected to a capacitor that is charged by increasing the voltage of the battery power supply, and a relaxation lamp that is operated by the battery power supply and whose oscillation period becomes longer as the voltage of the battery power supply decreases. an oscillation circuit; and a high-voltage trigger pulse generation circuit that generates a high-voltage trigger pulse in synchronization with the oscillation output of the relaxation oscillation circuit; the trigger pole of the flash discharge lamp is controlled by the output pulse of the high-voltage trigger pulse generation circuit. An emergency flashing device characterized by: