JP3160211B2 - Sensor light - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting fixture attached to a sensor such as a human body detection sensor, and more particularly to a light for a human body detection sensor using a solar cell as a power source.

[0002]

2. Description of the Related Art In a sensor light for detecting a human body using a solar cell as a driving power source, charging is not sufficiently performed due to insufficient sunshine. When charging is insufficient, power supplied is reduced and an overdischarge state occurs. Since this overdischarge causes deterioration of the battery, in order to prevent this, the conventional sensor light has a configuration provided with an overdischarge prevention circuit that operates so that the illumination is not turned on even when a human body is detected.

[0003]

However, in the above-mentioned prior art, during the operation of the overdischarge prevention circuit, the illumination is not turned on even if a human body is detected, so that the battery can be prevented from being deteriorated. The cause of the light-off state is not always due to over-discharge, but may be due to a broken bulb or a malfunction of equipment, and it is not easy to specify the cause.

The present invention has been made in order to solve such a problem. If the illumination of the sensor light does not light at night even though the human body is detected, the cause is due to the operation of the overdischarge prevention circuit. It is an object of the present invention to provide a sensor light which can be distinguished whether the light is due to a broken bulb or a light bulb, and in which the cost for such a discrimination display can be reduced.

[0005]

In order to achieve the above object, a sensor light according to the present invention will be described with reference to FIG. 1 which is a conceptual block diagram of the basic structure of the sensor light. And a light bulb 5 for illuminating a detection area based on human body detection information indicating that a human body output from the human body detection sensor 1 has been detected.
In the sensor light provided with the control unit 4 for turning on
A solar cell 3 serving as a driving power source, an LED 7 for displaying a power supply state of the solar cell 3, an LED driving unit 6 for driving the LED 7, and a power supplied from the solar cell 3 are compared with a predetermined value. And a supply power comparison unit 2 that outputs the comparison result to the control unit 4.
When the comparison result is equal to or less than the predetermined value and when the human body detection information is input, a driving signal is output to the LED driving unit 6 so that the LED 7 is turned on and off.

[0006] The apparatus further includes a ball-out detecting circuit 8 for detecting the ball-out of the bulb and outputting the ball-out information to the control section 4. In the case of a ball-out, the control section 4 turns the LED 7 on. It is preferable that a drive signal is output to the LED drive unit 6 and that this lighting state is set as drive control of the LED 7 with the highest priority.

[0007]

When the human body sensor 1 detects a human body,
The light bulb 5 does not light up when the surroundings are bright (daytime),
Lights up when the surroundings are dark (at night).

[0008] The supplied power comparing section 2 compares the power supplied from the solar cell 3 with a predetermined value, and outputs the comparison result to the control section 4. The control unit 4 determines whether or not the solar cell 3 is undercharged based on the comparison result. When the battery is insufficiently charged, the light bulb 5 is turned off and the LED 7 is turned on and off. By visually recognizing them, it is possible to recognize that the solar battery 3 is insufficiently charged.

Further, in the case where the bulb burnout detection circuit 8 is added, if the bulb 5 is turned off and the LED 7 is turned on, it is possible to recognize that the bulb 5 is out of bulb. If the LED 5 is turned off and the LED 7 is blinking, it can be recognized that the solar cell 3 is insufficiently charged. However, when the ball runs out, even if the solar cell 3 is insufficiently charged, the LED 7 does not blink, and the lighting state is prioritized.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Preferred embodiments of the present invention will be described below with reference to the drawings. FIG. 3 is a diagram showing an electric circuit configuration of a sensor light for detecting a human body suitable for use in the embodiment.

This sensor light is attached to a human body detection sensor 31 for detecting a human body and a brightness detection sensor 41 for detecting ambient illuminance, and a solar cell 33 is installed as a driving power supply. Current supplied from the solar cell 33 through the diode D ₁ battery 3a
However, an overcharge prevention circuit 39 for preventing the battery 3a from being overcharged is provided at the preceding stage.
On the other hand, when the power stored in the battery 3a is consumed (discharged), the voltage of the battery 3a gradually decreases. Therefore, an overdischarge prevention circuit 32 for preventing this overdischarge
The overdischarge prevention circuit 32 detects the voltage of the battery 3a, and outputs the detection result to the control circuit 34.
Output. The control circuit 34
Is based on the outputs from the human body detection sensor 31, the brightness detection sensor 41, and the over-discharge prevention circuit 32.
3 is determined to be insufficient, and an oscillation signal is output to the oscillation circuit 36 so that an output based on the determination result is displayed on the state determination lamp 37. The status determination lamp 37 includes an LED 3
7 is used.

Each of the above circuits will be described in more detail. First, a comparator 3c is provided in the overcharge prevention circuit 39, and the voltage value of the battery 3a input to its + terminal and the upper limit voltage value of the battery 3a set by the Zener diode TD and given to the-terminal Is compared. As a result of the comparison, when the voltage of the battery 3a is high,
By turning on the transistor T1 and consuming most of the power supplied from the solar cell 33 by the resistor R0, the current supplied to the battery 3a can be limited. Thus, overcharging of the battery 3a is prevented.

The over-discharge prevention circuit 32 includes a comparator 3
The voltage of the battery 3a, which is divided by the resistors R6 and R7, is input to a negative terminal of the terminal 2c, and this is the set value of the lower limit voltage of the battery. On the other hand, +
The voltage of the battery 3a regulated by the regulator 32r and divided by the resistors R8 and R9 is input to the terminal. As a result of comparing these voltages, when the battery voltage falls below the lower limit voltage, the output of the comparator 32c is inverted. This inversion operation is performed by appropriately setting the resistors R6, R7, R8, and R9. Further, the output of the comparator 32c is input to the control circuit 34.

The control circuit 34 determines whether to turn on / off the lighting 3r based on the human body detection information from the human body sensor 31, the illuminance information from the brightness detection sensor 41, and the overdischarge information from the overdischarge prevention circuit 32. And LED
Is turned on / off, and the drive is controlled to perform the determined operation for a time set in advance by a timer circuit. The blinking state of the state determination lamp 37 is controlled by the oscillation circuit 36.
First, when the state determination lamp 37 is not in a state to be turned on and off, the control circuit 34 does not operate the oscillation circuit 36 by turning off the transistor Q1. on the other hand,
When the state determination lamp 37 is to blink, the control circuit 34 turns on the transistor Q1 to turn on the transistor Q1.
The operation of the oscillation circuit 36 is started, and the state determination lamp 37 is turned on and off via the diode D2 and the transistor Q4. This blinking cycle is set by the capacitors C1 and C2 and the resistors R3 and R4.

FIG. 5 shows signals input to the control circuit 34 and signals output by the control circuit 34.
Here, inputs a, b, c and outputs A, B correspond to the reference numerals shown in FIG. The blinking of the state determination lamp 37 is performed in the states of X ₁ and X ₂ in FIG. That is,
This is a case where it is nighttime and the sensor light is not turned on and the battery is in an over-discharged state although the human body is detected. In this case, the state determination lamp 37 blinks to determine that the solar battery is insufficiently charged. In this case, for example, it is possible to take measures such as adjusting the timer to shorten the lighting time of the sensor lamp, or moving the solar cell to a more sunny place to efficiently charge.

If the sensor light does not turn on and the state determination lamp 37 is not blinking at night even though a human body is detected, it is determined that the bulb is out of light. Replace the sensor lamp.

Further, in the above-mentioned embodiment, there is provided a burnout detection circuit for detecting the burnout of the bulb of the sensor light.
It is more preferable that the ball can be detected without fail and the result can be visually recognized. FIG. 4 is a diagram showing an electric circuit configuration of a sensor light for detecting a human body suitable for use in the embodiment. In addition, about the structure equivalent to FIG. 3, the same code | symbol is attached. In this embodiment, an out-of-ball detection circuit 38 is added to the configuration shown in FIG. 3, and the control circuit 34 determines whether to turn on the state determination lamp 37 based on the output from the out-of-ball detection circuit 38. Is configured. Further, the state determination lamp 37
Is configured to light the state determination lamp 37 through the diode D3. The above configuration is a circuit added to the configuration shown in FIG. 3, and other circuit configurations are equivalent. Therefore, in this embodiment, in addition to the operation of the above-described embodiment, an input / output mode to the control circuit as shown in FIG. 6 is employed. That is, X
_1, in the case of a state of X ₂ are visible insufficient charging of the solar cell by state discriminating lamp 37 blinks and further, the state judgment in the case of the state of _{Y 1, Y 2, Y 3} , Y 4 By turning on the lamp 37, it is possible to visually recognize that the bulb has run out. Further, when the sensor light is not turned on and the state determination lamp 37 is turned off even though the human body is detected, it can be determined that the main body has failed. Due to this circuit configuration, the reason why the sensor light does not light at night even though the human body is detected is due to insufficient charging of the solar cell, due to the burnout of the light bulb, or the main body. It is possible to reliably determine whether the failure has occurred.

In this embodiment, when the over-discharge state of the solar cell and the out-of-bulb state of the bulb occur simultaneously, the out-of-sphere state of the bulb is displayed with priority.

Further, in this embodiment, since the LEDs are used for the state determination lamps 37, the power consumption is very small, and the durability is high, so that it is economical.

[0020]

As described above, the sensor light of the present invention comprises a control unit for lighting a bulb for illuminating a detection area based on human body detection information output from a human body detection sensor; An LED for displaying the power supply state, an LED drive unit for driving the LED, and a supply power comparison unit for comparing the power supplied from the solar cell with a predetermined value and outputting the comparison result to the control unit. The control unit is configured to output a drive signal to the LED drive unit so that the LED blinks when the comparison result is equal to or less than the predetermined value and the human body detection information is input, Insufficient charging of the solar cell can be detected and appropriate measures can be taken to prevent the deterioration promoted by the insufficient charging of the solar cell.

Further, in addition to the above configuration, a ball-out detection circuit is provided, and in the case of a ball-out, the control unit outputs a drive signal so as to turn on the LED,
In the case of a configuration in which ED has the highest priority drive control,
In addition to the above effects, the reason that the sensor light does not light
It is possible to reliably determine whether the solar battery is insufficiently charged, the bulb has run out, or the main unit has failed. As a result, it is possible to appropriately cope with such a cause, and maintenance is easy.

Further, since an LED is used as a means for visually recognizing these states, the power consumption is very small and the durability is high, so that it is economical.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram of a basic block of the present invention corresponding to claim 1;

FIG. 2 is a conceptual diagram of a basic block of the present invention corresponding to claim 2;

FIG. 3 is a diagram showing an electric circuit configuration of a sensor light for detecting a human body suitable for use in carrying out the present invention.

FIG. 4 is a diagram showing another electric circuit configuration of a sensor light for detecting a human body suitable for use in carrying out the present invention.

FIG. 5 is a diagram for explaining an operation of a control circuit in the configuration of FIG. 3;

FIG. 6 is a diagram for explaining the operation of the control circuit in the configuration of FIG. 4;

[Explanation of symbols]

 1 human body detection sensor 2 power supply comparison unit 3 solar cell 4 control unit 5 light bulb 6 LED drive unit 7 LED 8 ball burnout detection unit

────────────────────────────────────────────────── ─── Continuation of front page (56) References JP-A-5-74575 (JP, A) JP-A-5-166585 (JP, A) JP-A-5-159885 (JP, A) JP-A-6-159885 181003 (JP, A) JP-A-4-253103 (JP, A) JP-A-7-30499 (JP, A) JP-A-6-96876 (JP, A) Japanese Utility Model Laid-Open No. 59-119744 (JP, U) (58) Field surveyed (Int. Cl. ⁷ , DB name) H05B 37/02

Claims (2)

(57) [Claims] An electric bulb for illuminating a detection area is attached to a human body detection sensor for detecting a human body, based on human body detection information output from the human body detection sensor and indicating that a human body has been detected. In a sensor light including a control unit for turning on, a solar cell serving as a driving power source, an LED for displaying a power supply state of the solar cell, an LED driving unit for driving the LED, and a power supply from the solar cell. And a supply power comparison unit that outputs a comparison result to the control unit.
The control unit determines that the comparison result is equal to or less than the predetermined value,
If the human body detection information has been input, the L
A sensor light, which outputs a drive signal to the LED drive unit so as to make the ED blink. 2. The control device according to claim 1, further comprising a ball-out detecting circuit for detecting the ball-out of the bulb and outputting the ball-out information to the control unit.
2. The sensor according to claim 1, wherein a driving signal is output to the LED driving unit so that the LED is turned on, and the lighting state is set as a driving control in which the LED is given the highest priority. Light.