JPS60100079A - Solar radiation integrator - Google Patents

Abstract

PURPOSE:To perform the integration of solar radiation with high accuracy by simple, small and light wt. portable constitution, by converting an electric signal proportional to received light energy independent on a temp. outputted by a photoelectric converter to a pulse while counting and integrating said pulse to display the same. CONSTITUTION:A photoelectric converter 1 equipped with a temp. compensating thermister 12 and a solar cell 11 outputs an electric signal of DC voltage proportional to received light energy due to solar radiation independent on a temp. and DC voltage is converted to a pulse having a cycle proportional to said voltage by the voltage-frequency converting part 22 of a pulse converter circuit 2 to which power is supplied from a power source 4 having the solar cell 11 mounted therein. This pulse is counted and integrated by binary counters 31a, 31b of an integration and display circuit 3 and displayed by display devices 33a, 33b. According to this mechanism, the integration of solar radiation can be performed with high accuracy without receiving influence of the change in a temp. by simple, small and light wt. portable constitution.

Description

[Detailed Description of the Invention] The present invention relates to a solar radiation totalizer that measures the so-called cumulative amount of solar radiation, which can be determined by combining sunlight intensity (received light energy) and time. The present invention relates to a solar radiation totalizer that can be used to easily measure the cumulative amount of solar radiation.

Conventionally, there are various pyranometers that measure the intensity of sunlight per hour, but sunburn and skin irritation caused by sunlight are determined by the combination of sunlight intensity and time, that is, the cumulative amount of solar radiation. Conventionally, there has been no solar radiation totalizer that can easily measure such integrated amount of solar radiation.

However, as the significance of solar energy for health and beauty has become more important, there has been a growing need for a solar irradiance meter that can prevent excessive sunburn and enable appropriate tanning. Particularly in the elderly and young children, excessive tanning can be a cause of health damage, and even in adults, excessive tanning at the beach etc. not only causes skin irritation but also poses extremely important problems in terms of beauty and health.

The present invention was developed based on such social demands, and can be configured to be small, lightweight, and easily portable.
Another object of the present invention is to provide a solar radiation totalizer that can measure solar radiation easily and with high accuracy.

The present invention will be described in detail below based on the drawings.

FIG. 1 is an electrical circuit diagram of a solar radiation totalizer according to an embodiment of the present invention, which digitally integrates and displays the solar radiation amount converted into a DC voltage using a solar cell as a photoelectric conversion element.

In the figure, ■ is a photoelectric conversion circuit that outputs a DC voltage proportional to the received light energy (sunlight intensity), and is connected to the solar cell 11 that performs photoelectric conversion and forms a temperature compensation circuit. Thermistor 12 and resistors R1 and R2
, R3, which compensates for the temperature dependence of the output generated by the solar cell 11 in response to the sun's rays, and outputs it as a DC voltage proportional to the received light energy.

2 is a pulse conversion circuit that converts the DC voltage into a pulse train proportional to the voltage; a V-F converter 22 converts the DC voltage amplified by the signal amplifier 21 to a frequency proportional to the voltage; The converted frequency is converted into a trigger pulse (pulse train) having a pulse number proportional to the voltage by a differentiating circuit (not shown) or the like.

3 is an integration display circuit that counts and integrates the number of pulses and digitally displays the integrated amount of solar radiation of the received light energy; the number of pulses is counted by binary counters 31a and 31b and outputted as a binary number to decoders 32a and 32b; After converting into decimal numbers by decoders 32a and 32b, ICAO
etc. are displayed on the numerical display sections 33a, 33b.

The count is then incremented one by one and digitally displayed as a two-digit or three-digit integrated amount of solar radiation.

Incidentally, a gate circuit (not shown) may be interposed in front of the binary counter 31a, and a signal may be input to the counter every fixed number of pulses.

With this configuration, the count value of the counter 31a can be reduced, so the number of digits in the numerical display sections 33a, 33b can be reduced, and miniaturization is possible.

4 is a power supply circuit that supplies DC power to the pulse conversion circuit 2 and the integration display circuit 3, and the electromotive force generated by the solar cell 11 is stored in a secondary battery 42 such as a NiCd battery via a backflow prevention diode 41. , it is possible to always supply stable DC power, and since the present invention is always used under sunlight, there is no possibility of power outage.

Further, the solar cell 11' can also be used as the solar cell 11 used as the photoelectric conversion element, and in this way, the solar cell 11 functions as a sensor for detecting the amount of solar radiation and as a driving battery. It is possible to have both the functions of 1 and 2, thereby reducing the number of parts and downsizing.

51 is a power switch, and 52 is a reset switch for clearing the count value of the integration display circuit 3, one end of which is grounded.By operating this switch, the content of the count is cleared and the next solar radiation amount integration is started. You can prepare.

FIG. 2 shows another embodiment in which the integrated amount of solar radiation is displayed in the form of a bar graph, and the differences from the previous embodiment will be mainly explained.

In this figure, a photoelectric conversion circuit 1, a pulse conversion circuit 2, a power supply circuit 4, and switch sections 51 and 52 have the same configuration as in the previous embodiment.

On the other hand, the integrated display circuit 6 uses an LCD display section 63 that displays the integrated amount of solar radiation, instead of using the numerical display sections 33a and 33b using 7 or 8 segments as in the above embodiment.
The display is configured to display a bar graph.

That is, the number of pulses outputted from the pulse conversion circuit 2 and proportional to the received light energy is counted by the counter 81a and outputted to the interface 82a.
At step 2a, each segment 64 of the LCD display section 63 is sequentially energized from one side based on the count signal to display the cumulative amount of solar radiation in a bar graph.

When the energization of each segment 64 connected to the - interface f12a overflows, the pulse train is input to the next row of counter Blb while maintaining the energization of each segment 64, and the counter Blb
The count signal counted in b is sent to the next row interface 82.
b and sequentially energizes each segment 64 connected to the interface. Repeat this below.

In the case of this embodiment, in order to prevent the bar graph-shaped LCD display section 63 from becoming unnecessarily long, a gate circuit (not shown) is interposed in front of the counter fila, and a signal is sent to the counter 81a every fixed number of pulses. must be configured to input.

FIG. 3 is a schematic diagram showing the mechanical configuration of the embodiment shown in FIG. 2, in which the LCD display section 63, the solar cell Module 71. A power switch 51 and a reset switch 52 are efficiently arranged.

In order to indicate the appropriate degree of sunburn, the LCD display section 63 has instruction categories 72 such as "less,""suitable," and "dangerous," reminding the user to prevent excessive sunburn and to take proper sunburn precautions. is structured so that the amount can be seen at a glance.

It should be noted that the appropriate amount of tanning varies depending on the purpose of tanning, individual differences, etc., and cannot be discussed in principle.

For example, in the case of elderly people or young children, the amount of solar radiation needs to be small, and for adults to bake to a wheat brown color, it is necessary to increase the amount of solar radiation.

For this reason, the instruction sections 72 on the LCD display section 63 may be displayed in multiple stages, such as for infants and the elderly, and for adults.Also, the instruction sections 72 may be set uniformly, and a light-shielding filter ( (not shown) can be attached, and the light-shielding filter may be removed and used when an infant or elderly person tans.

In this embodiment, since the LCD display section 63 is configured in the form of a bar graph, the cumulative amount of solar radiation can be seen at a glance compared to the case of numerical display, and the display shows "less" which indicates the degree of sunburn.
Indication classifications 72 such as "appropriate" and "dangerous" can be easily added, and by configuring the solar cell module side 71 so that a light shielding filter can be attached, the appropriate display of the amount of solar radiation can be changed depending on the purpose of use, etc. You can also do it.

In addition, although each of the above embodiments uses a solar cell as a photoelectric conversion element, the present invention is not limited to this, and other light receiving elements may be used. In addition to the liquid crystal display, a light emitting diode may be used in the display section, and a buzzer may be used to notify the user when the appropriate amount of sunburn has been reached. Furthermore, as for the driving method, either voltage driving or current driving is possible.

As described above, according to the present invention, it is possible to provide a solar radiation totalizer that is small and lightweight, can be easily carried, and can measure easily and with high precision. Regardless of the intensity of sunlight or the length of time, it is possible to easily and accurately measure the amount of sunburn, making it possible to prevent excessive sunburn and skin inflammation caused by excessive sunburn.
2. Extremely effective for health and beauty.

Furthermore, by using a solar battery for the driving power supply, there is no need to replace the battery, and since the solar radiation totalizer is always used under sunlight, there is no possibility of power failure.

By using a bar graph display in the display section that displays the cumulative amount of solar radiation, the degree of sunburn can be clearly seen at a glance, and the degree of sunburn can be indicated by "low" or "adequate".
Instruction categories such as "danger" can be easily added.

It has various effects such as

[Brief explanation of the drawing]

Figures 1 and 2 are electrical circuit diagrams showing embodiments of the present invention; Figure 1 uses a numeric display section, and Figure 2 uses a bar graph display section. . FIG. 3 is a schematic diagram showing the mechanical configuration of FIG. 2. 0

Claims (1)

[Scope of Claims] 1) Photoelectric conversion means that outputs an electrical signal proportional to received light energy without being affected by temperature changes, and converting the electrical signal into a pulse train having a pulse number proportional to the electrical signal. A solar radiation integrator comprising a pulse conversion means, an integration display means for sequentially counting and integrating the number of pulses and displaying the integrated amount of the received light energy, and a driving power source 2) A solar cell is used for the driving power source. 3) A solar radiation totalizer according to claim 1, in which the solar cell used in the driving power source is also used as a photoelectric conversion element 4) The solar radiation totalizer according to claim 2, wherein the solar radiation totalizer is used as a photoelectric conversion element. The solar radiation totalizer according to claim 1, 2, or 3, wherein a bar graph display is used as a display section for displaying the integrated amount of