JPS61296683A - Automatic flash for lighting load - 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 Industrial Application] The present invention relates to an improvement in an automatic flashing device for a lighting load, which is suitably used for street lights and the like.

[Background technology]

Conventionally, this type of system 1 detects an external light switch as an impedance change using a light amount detection means such as CdS, and applies a voltage corresponding to the change to a switch control section to open and close a bimetal switch to control the lighting load. It flashes automatically.

However, in such devices, since the bimetal switch opens and closes slowly, the contact point I
! l! becomes unstable, and the contact pressure becomes almost 0 near the point where the contact of the bimetal switch opens or closes, so d+ becomes stiff for a long time, making the contact unstable!
A4 is used to shorten the life of the contacts.

In addition, the change in external light is extremely irregular, and there is a 1% chance that it will pulsate due to the presence of clouds, and if it occurs when it is in the unstable region of the pulsating heart I contact point, the lighting load will be affected. This causes the lights to flicker inadvertently.

In order to solve this problem, a bimetal switch has been developed in which a so-called jump spring is used to provide a hysteresis characteristic to the operation of the switch.

With such a device, it is not possible to provide a mechanism to compensate for the ambient temperature lt8 in the bimetal switch, so the operation is performed by varying the heat generation rate of the bimetal switch heater according to changes in the valve opening temperature. It is unstable.

Further, if the bimetal switch mechanism is constructed in a jump-type manner, there are problems such as the structure of the device becomes complicated.

[Object of the invention].

The present invention was made in view of these circumstances, and it is possible to configure the switch without using a spring mechanism. The purpose of this device is to provide a reliable electronic automatic flashing device, and when it reaches the operating level of the external light source even with gradual changes in external light intensity, this is the opening/closing operation of the switch. An object of the present invention is to provide an automatic flashing device for a lighting load that reliably performs the following and prevents an unstable state from rx<t.

[Disclosure of the invention]

The present invention will be described in detail below.

FIG. 1 is an embodiment diagram showing the basic configuration of the present invention.

In the figure, 1 is a main switch for blinking the negative illumination fI2, 3 is a power source, 4 is a device detection means, 5 is an auxiliary switch control section, 6 is a voltage variable circuit section including an impedance element 7, 8 9 indicates a main switch control section, and 9 indicates an auxiliary switch.

To explain the basic operation of the present invention, the light angle detection means 4]
By detecting the external light pupil and changing its innovidance by 9, the voltage supplied from the power source 3 to the auxiliary switch control unit 5I reaches the operating level of the auxiliary switch 9; when the auxiliary switch 961 opens and closes, the voltage variable circuit unit Activate 6. Then, the voltage 1 supplied to the auxiliary switch control section 5
)i The auxiliary switch 9, which has instantaneously increased or decreased and is now in the open or closed state, is further operated in the biasing direction to bring the switch 9 into a stable state. As a result, the main switch control unit 8 is supplied with a drive voltage O (which exceeds the operating level of the main switch 1), and if the main switch l opens and closes,
This is to make the light bulb 2 blink at 1 center.

Fig. 2 shows the operation sequence of the present invention, and Fig. 3 shows the operation sequence of the present invention.
FIG. 3b shows an operational characteristic diagram of the auxiliary switch according to the present invention.

3a and 3b show the function I of the voltage variable circuit section 6.
From this, the change in the driving force f received by the auxiliary switch 9 is expressed as external light 1.
31 is a characteristic diagram in which the driving force of the auxiliary switch increases as the external light convergence Oi increases, and FIG. The graph shows a characteristic diagram of the case where the driving force of the auxiliary switch decreases by 1% as the power increases.
) and others with any characteristic can be used as 4d.

In the present invention, as shown in these figures, when the external light level (XI,
The driving force f increases or decreases instantaneously by 62 minutes from the point F'l, F'2 when the moth opens or contacts 1, so the auxiliary switch 9 is in the open or closed state. When this happens, the state shifts to a state where the temple is at home at Shun 1 Temple, and the unstable state is avoided.

In the figure, ■-■ indicates the state in which the auxiliary switch switches from closed (O) to open (or from open to closed). The present invention exhibits such a hysteresis characteristic.

FIG. 4 shows a modification of the embodiment shown in FIG. 1, in which the auxiliary switch 9 is constituted by a non-contact circuit using transistors Trl and Tr2, and the auxiliary switch control section 5 is
Resistance Iζ1. It is constructed by connecting a Zener diode ZD in series to R2, and this Zener diode Z0 defines the operating level of the transistor Tr2.In addition, D rectifies the AC power supply gL to pivot the non-contact circuit. This is a luxury diode installed to obtain a reef source.

To explain the operation of this embodiment circuit, as the number of external eyelids increases, the impedance of CdS decreases by 1, so the Zener diode Z D Of breaks over and the transistor Tr26 (ON becomes ON, and the transistor Tr1 becomes OF
'FJ turns around and operates the 6 voltage variable circuit sections. That is, since the transistor TrlO (OF'F) is connected, the resistor R1 connected in parallel to the switch control unit 5 is disconnected, and the voltage applied to the switch control unit 5 becomes even thicker (and the transistor Trl transitions to a complete OFF state at -ψ.When the transistor Trl is turned off, voltage is no longer supplied to the relay coil RC+, so its contact SW opens to ensure that the incandescent lamp La is extinguished.

On the other hand, when the external light intensity decreases, the interference of CdS increases, so the voltage applied to the switch control unit 5 decreases, the Zener diode ZD is turned off, the transistor Tr2 is turned off, and the transistor Tri is turned on.
Then, the voltage variable circuit section 6 is activated. That is, since the transistor Trl is turned on, the resistor Ht is connected in parallel to the switch control section 5, the voltage applied to the switch control section 5 further decreases rapidly, and the transistor Tr2 shifts to a completely off state. do. Therefore, the voltage of the source 3 is applied to the relay coil RC, and the incandescent lamp La% is reliably lit.

51 and 6 show a configuration in which an auxiliary switch control section 5 is connected in parallel to the light shade detector IR4 to form a part of the voltage divider circuit of the power supply 3. In particular, FIG. Detection means 4
A voltage dividing resistor R1 is connected to the parallel connection body of the and auxiliary switch control section 5.
The figure shows a voltage divider circuit configured by connecting the two in series.

In addition, FIG. 6 shows a series connection of the original hit detection means 4 and the auxiliary switch control section 5, and a main switch control section 8 connected in parallel, and a resistor R1 connected in series to these parallel connections.
This shows an example of a voltage divider circuit for a power supply. When the voltage variable circuit section 6 is activated, the bimetal switch B 1316f
The heater RI (2) is connected in parallel to the series connection body of the heater RHI and CdS by opening and closing the gate.

In FIG. 7, a resistor R[, a heater Rf(
1, RH2 are connected in series, and the resistor R is connected/disconnected by closing/closing the auxiliary switch 9.

In addition, when configuring the unexploded spacer, a timer circuit is added, and a switch means is used to control the illumination negative 1f.
r6<The light may be forcibly turned off one hour after being turned on. As a result, when the lighting load is, for example, a street light, it goes without saying that the light can be turned off until morning, when there are few people around, to save power.

FIGS. 8 to 11 show examples in such a case. In these embodiments, each of the main switches 1vi is configured to perform a timed operation, and a timer circuit T is provided for this purpose.

That is, in FIG. 8, the contact SW is closed only during the set time of the timer circuit T, and the 9th
In FIG. 1, it is constructed using a timer circuit T1 and a timer circuit ICTl, and sets the conduction time of the transistor T2.

In addition, in FIG. 1υ, a timer circuit T=d and a photothyristor PhT are used (4), and its turn-on value +iJj can be set in advance.

Ilc, 11d is the timer 1st heat T, and the heater R
When H is heated through 4 and C is present, the bimetal switch 882 constituting the main switch 1 can be closed.

In addition, the input terminal of the timer circuit on each implementation side is C.
Of course, even if it is connected directly to both ends of dS, it will not remain the same.

8. It goes without saying that, in addition to the above-mentioned embodiments, both contact and non-contact switch means can be applied to the switch means of the present invention.

[Young fruit of invention]

According to the present invention, it is possible to avoid the unstable opening/closing condition of the switch means that operates in response to gradual changes in the outside light by using a switch with a jump spring groove. It is possible to perform the blinking operation of the lighting load reliably.

In addition, when a contact switch is used as the switching means, it can effectively prevent arc discharge between stirring points and extend the life of the contacts, resulting in highly reliable automatic flashing of lighting loads* You can get a S.

[Brief explanation of the drawing]

, Atsushi 1 is an embodiment diagram showing the basic concept of the present invention, and 21st
The figure is a flowchart showing the operation sequence of the present invention, Figures 3, 3a, and 3b are operational characteristic diagrams of the auxiliary switch in the present invention, and Figures m4 to 11 are all electrical It is a circuit diagram. 1... Main switch 2... Load 3... Power supply 4
... Light weight detection means 5 ... Auxiliary switch control section 6
...Variable voltage circuit section 7...Impedance element
8... Main switch control section 9... Auxiliary switch control section Figure 8 Figure 9 Figure 10 Figure 11 Procedure for writing amendments) % formula % 2. Title of the invention: Automatic flashing device for lighting loads 3. Relationship with the case of the person making the amendment Patent applicant address: Oaza Kadoma, Kadoma City, Osaka Prefecture 1048 address name
(583) Matsushita Electric Works Co., Ltd. Representative Fujii
Sadao 4, Agent Address: 1048 Kadoma, Kadoma City, Osaka Prefecture 1986
September 4, 1989 (Shipped on September 24, 1988) 6. Subject of amendment Description 7. Contents of amendment Procedural amendment May 26, 1986

Claims (2)

[Claims] (1) An automatic flashing device for a lighting load that automatically flashes a lighting load by sensing the amount of outside light, including (a) a main switch that flashes the lighting load; (b) a main switch control that opens and closes this main switch. (c) A light amount detection means that changes impedance according to the amount of external light. (d) A light amount detection means that is inserted between the main switch control section and the power source and opens and closes when the voltage supplied through the light amount detection means reaches an operating level. (e) an auxiliary switch control unit that opens and closes the auxiliary switch; (f) an auxiliary switch control unit that instantly changes the drive voltage supplied to the switch control unit of the auxiliary switch when the auxiliary switch is once opened or closed; An automatic flashing device for a lighting load, comprising a voltage variable circuit section for further operating the auxiliary switch in the energizing direction. (2) The automatic flashing device for a lighting load according to claim 1, wherein the main switch has a time-limited operation.