JP3088725U - Portable UV detector - Google Patents

Abstract

(57) [Summary] (with correction) [PROBLEMS] To provide a portable ultraviolet detection device which can be operated by a simple procedure to measure an ultraviolet irradiation level in an outdoor environment. A portable ultraviolet detection device includes a main body in which a circuit board, a display module, and a plurality of batteries are stored. Window 13 for display panel
Is located on the outer wall of the body for mounting a display module having a display for the appropriate ultraviolet radiation level. The photodetector 22, located in the body inside the filter lens 11, has a button 30 for measuring the intensity of the incident light whenever the user wishes to know the intensity of the UV radiation in an outdoor environment. Activated when pressed. Light of different intensities exhibits different electrical properties with respect to current, voltage and resistance. Via a photodetector, a predetermined value is measured and converted to the actual UV radiation level corresponding to the appropriate reading scale.

Description

[Detailed description of the invention]

[0001]

[Technical field to which the invention belongs]

 The present invention relates to an ultraviolet detector that is easy to use, and more particularly to a portable ultraviolet detector that can immediately display the degree of ultraviolet radiation (hereinafter referred to as “UV”), that is, the ultraviolet radiation level in an outdoor environment.

[0002]

[Prior art]

 As people develop science and technology and industry, they begin to think about their environment and its impact on themselves. Undoubtedly, with the rapid progress in the high-tech industry, the so-called high-tech industry, people have gained many new styles of useful goods, while sacrificing them. For example, the ozone layer provides an important function that blocks harmful ultraviolet rays from the sun. Scientists have found that fluorocarbons have created a hole in the ozone layer above Antarctica. Many people take it for granted that the ozone layer protects nature because humans cannot see ultraviolet light. The news that the ozone population was being destroyed was therefore surprising to many.

In the past, only a very small amount of ultraviolet light passed through the atmosphere to the surface of the earth because the ozone layer absorbed much of the ultraviolet light sent from the sun to the earth. The dangers of the effects of ultraviolet radiation on living things on the planet are less pronounced, at least not obvious in human daily life.

However, the fact that portions of the ozone layer have been destroyed to the extent that holes are present, suggests that the ozone layer surrounding the earth is becoming thinner. The continuous destruction of the ozone layer can cause considerable harm to humans and other organisms if no action is taken to control the situation. Humans who are very exposed to UV radiation undergo pathological changes. It is known that some species that rely on the natural protection of the ozone layer against harmful ultraviolet radiation are gradually decreasing. Organisms exposed to excessive UV radiation are susceptible to disease, and some species will soon face extinction.

The depletion of the ozone layer has been a long-term concern of environmental institutions, and legislation has been enacted in all countries to ban the use of coolants that harm ozone. Despite legislative efforts around the world, holes in the ozone layer have not been repaired and their size is slowly increasing. Unless this situation is remedied, ultraviolet light emitted from the sun through the holes in the ozone layer or damaged layers is likely to cause skin diseases or skin tumors.

[0006] Since overexposure to ultraviolet light has proven to be detrimental to human health, the media has been required in daily weather forecasts to provide viewers with knowledge of ultraviolet radiation levels. Began reporting UV irradiation levels. However, such forecast information from the press is at best only useful as a rough reference. Persons participating in outdoor activities do not have current information about the level of UV exposure at the specific location where they are actually located, and may take any measures to protect their skin against UV radiation. I don't know if precautionary measures should be taken. In general, a set of UV detectors is very expensive and requires a lot of space for installation, making it impractical for individuals.

[0007] Nevertheless, ultraviolet radiation has a health hazard that affects people who work constantly in an outdoor environment. Therefore, it is necessary to provide an ultraviolet detector capable of measuring the ultraviolet irradiation level, satisfying the demands of consumers and being economical.

[0008]

[Problems to be solved by the invention]

 SUMMARY OF THE INVENTION It is an object of the present invention to provide a portable ultraviolet detection device that can be operated with a simple procedure to measure an ultraviolet irradiation level in an outdoor environment.

[0009]

[Means for Solving the Problems]

 The ultraviolet detection device according to the present invention includes a hollow main body, a filter lens, a display module, a circuit board, a photodetector, and a plurality of batteries.

[0010] The filter lens is attached to one end of the main body, and a plug is attached to the other end. A closed space is formed in the body inside the plug to accommodate multiple batteries. The window is formed through the outer wall of the main body to which the display module is attached.

The output conversion circuit of the circuit board is connected to an input terminal connected to a photodetector mounted in the main body inside the filter lens, and to a display module mounted in a window for a display panel of the main body. And an output terminal.

A battery provides the operating voltage for the power conversion circuit and the photo detector.

The user of the UV detector only needs to point the filter lens towards the sky or towards the sun so that the photodetector can measure the intensity of the light beam. The output conversion circuit converts the measured voltage to an ultraviolet irradiation level corresponding to a reading scale for display to a user by a display module. Consumers can carry UV detectors wherever they go, and instantly read UV exposure levels in any outdoor environment.

[0014] A circuit board according to the present invention includes a push button switch, a light detection circuit, a comparison circuit, and a power switch circuit.

[0015] A push button switch is mounted in a suitably located hole in the outer wall of the body to control the operation of the output conversion circuit and the photodetector.

The light detection circuit includes a plurality of resistors and a photo resistor. Resistors form a voltage divider circuit such that a reference voltage is generated at each voltage tap connection, and photoresistors are used to form photodetectors.

[0017] The comparison circuit includes a plurality of comparators. The reference voltage terminal of each comparator is connected to a connection point for voltage extraction so as to receive the reference voltage. The input terminal of each comparator is connected to a resistor having a different resistance value for voltage detection. The output terminal of each comparator is connected to the corresponding pin of the display module to control the illumination of the smallest display segment to the display module.

The power switch circuit of the circuit board includes a push-button switch and a battery connected in series to control the operating voltage of the light detection circuit, the comparison circuit and the display module.

When the push button switch is activated and energized by the battery, the light detection circuit starts measuring the intensity of the incident light. The measured voltage value is output to a comparison circuit for comparison with the voltage setting value of each comparator. The result of such a comparison is used to determine the number of display segments to be illuminated. The number of illuminated display segments corresponds to the UV illumination level.

The ends of the series-connected push-button switch and the battery are connected to a resistor and a zener diode connected in parallel at a specific connection point. The connection point is connected to one input pin of the display module to control the illumination of the smallest display segment.

[0021]

[Embodiment of the invention]

 Referring to FIGS. 1 and 2, the ultraviolet detecting device according to the present invention includes a main body 10, a filter lens 11, a display module 23, a circuit board 20, a photodetector 22, and a plurality of batteries 24. including.

The main body 10 has a cylindrical shape. The filter lens 11 is a lens for filtering so as not to allow all components of light other than ultraviolet light to pass therethrough, and is attached to one end of the main body 10. A plug 12 having a threaded portion is detachably attached to the other end of the main body 10, and a chamber (not numbered) is formed in the main body 10 as a closed space. A plurality of batteries 24 are located in the body inside the plug 12 in the chamber. A window 13 for a display panel is formed through the outer wall of the main body 10. The through hole 14 is formed through the outer wall of the main body 10 on the side opposite to the position of the display panel window 13 in the radial direction. A push button 30 is attached to the through hole 14.

The display module 23 is attached to the display panel window 13 through the outer wall of the main body 10. The display module 23 can display in a format using numbers or a format using graphics. In this embodiment, the display is made in a format using graphics. Referring to FIG. 3, the display module 23 comprises five aligned display segments 231 to 235 and a scale of the UV radiation level printed along one side of the display module 23 to represent the UV radiation level. (Not numbered). The UV illumination level is represented by the number of illuminated display segments 231-234.

The output conversion circuit (not numbered) is arranged on the circuit board 20. The input terminal of the output conversion circuit is connected to a photodetector 22 disposed at one end of the main body 10 just inside the filter lens 11, and the output terminal of the output conversion circuit is connected to the display module 23 in the main body 10. It is connected to the.

Referring to FIG. 3, in an actual design, the output conversion circuit includes a push-button switch 30, a light detection circuit 40, a comparison circuit 50, and a power switch circuit 60.

The light detection circuit 40 includes a plurality of resistors VR1, R14 and R15, and a photo resistor RV1. The resistors VR1, R14, and R15 are used to form a voltage dividing circuit that generates a reference voltage (hereinafter, referred to as “VREF”) at a connection point for each voltage extraction, and the photoresistor RV1 is a photodetector. 22 is formed.

The comparison circuit 50 includes a plurality of comparators 51 to 54. A reference voltage terminal of each comparator is connected to a voltage extraction connection point of the photodetector circuit 40 so as to receive a reference voltage (VREF). The input terminals of the comparators 51 to 54 are connected to resistors having different resistance values for voltage detection. The output terminals of the comparators 51 to 54 are connected to the corresponding input pins of the display module 23 so as to control the illumination of the corresponding display segments 231 to 234.

The power switch circuit 60 including the push-button switch 30 and the battery 24 connected in series controls the operating voltage (hereinafter, “Vcc”) of the light detection circuit 40, the comparison circuit 50, and the display module 23. Control. The ends of the push-button switch 30 and the battery 24 are connected to a resistor R10 and a zener diode D3 connected in parallel at a connection point L, which controls the illumination of the fifth display segment 235. As described above, are sequentially connected to one pin of the display module 23.

When the push button switch 30 is actuated and energized by the battery 24, power is supplied to the display module 23. A high potential is output by the power switch circuit 60 to illuminate the fifth display segment 235. Light detection circuit 40 begins to inspect and measure the incident light. The measured voltage values are output to comparators 51-54 of the comparison circuit 50 for comparison with individual voltage settings to determine the number of display segments 231-234 to be illuminated. The number of illuminated display segments 231 to 234 represents the corresponding ultraviolet radiation level. Each of the input terminals of the comparators 51 to 54 is preset with a different voltage value. When the voltage set value is smaller than a reference voltage value (hereinafter referred to as “VREF”), a high potential is output from an output terminal to a corresponding pin of the display module 23 so that the corresponding display segment 231 to 234 is illuminated. Is done. Since the number of the illuminated display segments 231 to 234 is proportional to the measured UV irradiation level, the user can easily know the UV irradiation level displayed by the UV detecting device by the reading scale. .

When the user wants to know the ultraviolet irradiation level in an outdoor environment, the user only has to turn the filter lens 11 of the main body 10 toward the sun so that sunlight enters the filter lens 11. The filter lens 11 filters incident light so as not to pass all components of light other than ultraviolet light. The remaining light is received by a light detector 22 that measures the intensity of the ultraviolet light. The voltage measurement value after the voltage conversion is converted into a predetermined display format according to the number of display segments corresponding to the ultraviolet irradiation level. The operating state is displayed via display segments 231 to 235 shown in FIG. The number of energized display segments depends on the measured intensity of the UV light. The user can easily know the UV irradiation level by means of the UV irradiation level display scale along one side of the display segment used to understand the UV intensity. Therefore, consumers can take appropriate measures to protect their skin against UV radiation.

The present invention has the following advantages.

(1) It is easy to use. The operation of the portable UV detector is controlled by a push-button switch 30 conveniently located on the body 10 and the UV detector is set up so that it can be used with simple adjustment of the filter lens 11. .

(2) The main body is downsized. A streamlined body or a body having a simplified shape is used to accommodate the photodetector 22, the circuit board 20, the battery 24, and the display module 23.

(3) Reading is easy. The display is provided with a reading scale corresponding to the UV exposure level, so that the user can immediately read the UV exposure level in any outdoor environment.

Although embodiments of the present invention have been described, it will be apparent to those having skill in the art that changes in detail, particularly in matters of shape, size and arrangement of parts, are possible. .

[Brief description of the drawings]

FIG. 1 is an exploded perspective view showing a portable ultraviolet detection device according to the present invention.

FIG. 2 is a partial cross-sectional view of the portable ultraviolet detection device shown in FIG.

FIG. 3 is a circuit diagram showing an electric circuit configuration of the portable ultraviolet detection device shown in FIG. 1;

FIG. 4 is a front view of the portable ultraviolet detector shown in FIG. 1;

[Explanation of symbols]

Reference Signs List 10 body 11 filter lens 12 plug 13 window for display panel 14 through hole 20 circuit board 22 photodetector 23 display module 231, 232, 233, 234, 235 display segment 24 battery 30 push button 40 photodetection circuit 50 comparison circuit 51, 52, 53, 54 Comparator 60 Power switch circuit VR1, R10, R14, R15, Resistor RV1 Photoresistor D3 Zener diode

Claims (3)

[Utility model registration claims] 1. A hollow body having a filter lens mounted at one end and a plug positioned at the other end, and an output disposed on a circuit board for converting measured light intensity to a corresponding ultraviolet radiation level. A conversion module, a display module having a graphic or numerical display, and a scale for ultraviolet radiation levels marked along one side; and a display module within the body inside the output conversion circuit and the filter lens. And a plurality of batteries housed within the body inside the plug to provide an operating voltage for a photodetector disposed therein, wherein a space within the body inside the plug is a battery chamber. A window for a display panel is formed on the outer wall of the main body; an input terminal of the output conversion circuit is connected to the photodetector; and an output terminal of the output conversion circuit is the window It is connected to a display module installed in, portable UV detector. 2. The circuit of the detection device for controlling activation or deactivation of a control circuit including a battery, the output conversion circuit, the photodetector, and the display module by a push button switch. The device of claim 1, wherein the device is attached to a substrate. 3. The output conversion circuit includes: a light detection circuit including a plurality of resistors so as to form a voltage dividing circuit; a comparison circuit including a plurality of comparators; the push-button switch and the battery; A power switch circuit connected in series, wherein the photodetector circuit generates a reference voltage at each voltage extraction connection point, is connected to the photodetector including a photoresistor, and includes a reference for each comparator. A voltage terminal is connected to the connection point for voltage extraction, an input terminal of each comparator is connected to the resistor having a different resistance value, and an output terminal of each comparator is connected to a corresponding pin of the display module. A push-button switch such that a resistor and a zener diode connected in parallel at a predetermined connection point (L) control operating voltages of the light detection circuit, the comparison circuit and the display module. And the connection point (L) is connected to intersect with the end of the battery, and the connection point (L) is connected to one of the display modules to control the illumination of one display segment.
3. The device of claim 2, wherein the device is connected to two input pins.