JP2009145144A - Urine contamination discriminating fluorescent lamp and urine contamination discriminating method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To discriminate urine contamination with high precision regardless of the elapse of time in a urine contamination discriminating fluorescent lamp for discriminating the urine contamination by irradiation with light. <P>SOLUTION: A fluorescent substance layer containing BaSi<SB>2</SB>O<SB>5</SB>: Pb<SP>2+</SP>and SrB<SB>4</SB>O<SB>7</SB>: Eu<SP>2+</SP>is formed on the inner wall surface of the glass pipe 10 of the urine contamination discriminating fluorescent lamp 1. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

  The present invention relates to a fluorescent lamp, and more particularly to a fluorescent lamp for identifying urine contamination for identifying urine contamination and a method for identifying urine contamination.

  Conventionally, in toilets after use, urine contamination caused by urine splashing during urination has been a problem. Splashed urine usually generates a bad odor when it is dried, so it can be confirmed whether or not the urine is contaminated by human sense of smell, but it is difficult to confirm the urinary contamination by human vision. . Therefore, by utilizing the property that urine emits light when urine (urine component) is irradiated with ultraviolet light, the urine is irradiated by irradiating light from the ultraviolet light-emitting fluorescent lamp to the urine contaminated area where there is a possibility of urine contamination. A urine contamination identification method for emitting light to identify urine contamination sites has been proposed.

In such a urine contamination identification method, a fluorescent lamp generally referred to as black light blue is used as an ultraviolet light emitting fluorescent lamp, and the black light blue fluorescent lamp is a dark blue special glass that does not transmit visible light. By using a lead-activated barium silicate phosphor (BaSi ₂ O ₅ : Pb ²⁺ ) that emits near ultraviolet light having a wavelength of 300 to 400 nm mainly having a peak wavelength of 351 nm, only near ultraviolet light is effectively used. It is a fluorescent lamp designed to radiate.

  However, in the black light blue fluorescent lamp as described above, the luminescence intensity from urine is weak, and the urine with a long standing time is weaker than the relatively new urine with a short standing time. There has been a problem that identification by measurement using equipment cannot be performed sufficiently.

  The present invention has been made in view of the above circumstances, and can be used to identify urine contamination that can emit light of higher emission intensity from urine regardless of the passage of time and can identify urine contamination with high accuracy. An object of the present invention is to provide a fluorescent lamp and a urine contamination identification method.

The fluorescent lamp for identifying urine contamination of the present invention is a fluorescent lamp for identifying urine contamination for identifying urine contamination by irradiating light,
A phosphor layer containing BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ²⁺ is formed on the inner wall surface of the glass tube of the fluorescent lamp.

In the fluorescent lamp for identifying urine contamination according to the present invention, the blending weight ratio of BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ²⁺ is preferably 1: 9 to 9: 1, and 1: 5. More preferably, it is ˜5: 1.

In the urine contamination identification method of the present invention, the fluorescent lamp in which a phosphor layer containing BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ²⁺ is formed on the inner wall surface of the glass tube is used in the urine contamination region. It is characterized by irradiating light and identifying a urine contaminated portion based on light emission from the urine contaminated region.

  Here, the urine-contaminated area means an area where there is a possibility of urine contamination, for example, an area where urine such as a toilet wall or floor may be scattered. It means a place where urine is contaminated.

According to the present invention, BaSi ₂ O ₅ : Pb ²⁺ , which is a fluorescent substance that easily emits urine with a relatively short standing time, and urine with a relatively long standing time are placed on the inner wall surface of the glass tube of the fluorescent lamp. Since a phosphor layer containing SrB ₄ O ₇ : Eu ²⁺ , which is a phosphor that easily emits fluorescence, is formed, it is possible to obtain light emission with higher emission intensity from urine regardless of the passage of time. The urine contamination can be identified with high accuracy.

  Thereby, when the urine contamination area | region with possibility of urine contamination is irradiated with the light from the fluorescent lamp for urinary contamination identification of this invention, urine is light-emitted, and time has not passed. Since both urine contamination and time-lapsed urine contamination can be emitted with higher intensity, the urine contamination site can be easily identified.

  Hereinafter, a fluorescent lamp 1 for identifying urine contamination according to an embodiment of the present invention will be described in detail with reference to the drawings. Here, FIG. 1 is a cutaway perspective view showing a part of the fluorescent lamp 1 for identifying urine contamination.

As shown in FIG. 1, the fluorescent lamp 1 for identifying urine contamination according to the present embodiment includes a glass tube 10 having a phosphor layer 10a formed on an inner wall surface, and electrode portions 11 provided inside both ends of the glass tube 10, The phosphor layer 10a is formed of a phosphor containing BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ²⁺ . Further, a conductive material 13 for assisting starting is provided on the outer surface of the glass tube 10. The glass tube 10 is formed of a deep purple special filter glass that does not transmit visible light.

  The electrode unit 11 includes a stem 11a that seals both ends of the glass tube 10, two lead wires 11b fixed to the stem 11a, and a filament that is held by the two lead wires 11b and is coated with an electron-emitting material. 11c.

  The base part 12 includes a base body 12a attached to both ends of the glass tube 10 and two electrode pins 12b fixed to the base body 12a. The lead wires 11b are electrically connected to the electrode pins 12b, respectively. When a voltage is applied to the electrode pins 12b at both ends of the glass tube 10, a current flows through the filament 11c.

  In the internal space of the glass tube 10, a mixed gas in which a rare gas such as argon or xenon and mercury are mixed is sealed as a discharge medium.

  The fluorescent lamp 1 for identifying urine contamination configured as described above applies a voltage between the electrode portions 11 at both ends of the glass tube 10 by inserting the electrode pins 12b at both ends of the glass tube 10 into a lighting fixture, for example. When a current flows through the filament 11c through the electrode pin 12b and the lead wire 11b, the filament 11c is heated, and electrons are emitted from the filament 11c. Then, discharge is started by the emitted electrons and the rare gas in the glass tube 10, and the mercury in the glass tube 10 is excited by the electrons generated by the discharge, and ultraviolet rays are emitted from the mercury. The emitted ultraviolet light hits the phosphor layer 10a to emit light.

And in this invention, the light emitted by the above is irradiated with respect to the urine contamination area | region which may be urine contaminations, such as a toilet, and a urine contamination location is identified based on the light emission from a urine contamination area | region. At this time, the characteristic of the present invention is that the phosphor layer 10a is made of a phosphor containing BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ²⁺ .

Here, in FIG. 2, when the fluorescent layer 10a is a fluorescent lamp formed of a phosphor of SrB ₄ O ₇ : Eu ²⁺ and a fluorescent lamp formed of a fluorescent substance of BaSi ₂ O ₅ : Pb ²⁺ , respectively. FIG. 3 shows a phosphor layer 10a formed of a phosphor containing BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ²⁺ as a light source. An emission spectrum is shown. In FIG. 2, the solid line represents the emission spectrum of a fluorescent lamp formed with a phosphor of SrB ₄ O ₇ : Eu ²⁺ , and the dotted line represents the emission spectrum of a fluorescent lamp formed with a phosphor of BaSi ₂ O ₅ : Pb ^2+. .

As a conventional fluorescent lamp for identifying urine contamination, a fluorescent lamp generally referred to as black light blue is used, and the black light blue fluorescent lamp is a phosphor of BaSi ₂ O ₅ : Pb ^{2+ as} a phosphor layer. Was used. A fluorescent lamp formed of a phosphor of BaSi ₂ O ₅ : Pb ²⁺ usually has optical characteristics with a peak wavelength of 351 nm and a half-value width of 41 nm, as shown by a dotted line in FIG.

  However, in the fluorescent lamp having the above-mentioned light characteristics, the luminescence intensity from urine is weak and the urine having a long standing time has a lower luminescence intensity than the relatively new urine having a short standing time. There is a problem that the identification by the measurement or the like that has been performed cannot be performed sufficiently.

    Therefore, the present inventors conducted a verification test using a sample plate coated with urine in order to verify the relationship between the retention time of urine contamination and the absorption spectrum. It was confirmed that the absorption spectrum shifted to the long wavelength side.

Based on the verification results, the fluorescent lamp has a longer peak wavelength than the black light blue fluorescent lamp, and the phosphor layer has an optical characteristic with a peak wavelength of 368 nm and a half-value width of 20 nm as shown by a solid line in FIG. The fluorescent lamp and phosphor layer 10a made of a phosphor of SrB ₄ O ₇ : Eu ²⁺ having the optical characteristics of BaSi ₂ O ₅ having a peak wavelength of 351 nm and a half-value width of 41 nm as shown by a dotted line in FIG. : Pb ²⁺ and the phosphor containing SrB ₄ O ₇ : Eu ^2+, and the blending weight ratio of the phosphor is BaSi ₂ O ₅ : SrB ₄ O ₇ = 5: 1, as shown in FIG. Using a fluorescent lamp having excellent light characteristics and a fluorescent lamp having a mixing weight ratio of the above phosphors of BaSi ₂ O ₅ : SrB ₄ O ₇ = 3: 1, 1: 1, 1: 5, respectively. Irradiation tests were conducted in which urine was irradiated with light and the luminescence intensity of urine was measured. Here, FIG. 4 shows a schematic diagram of an irradiation tester.

  As shown in FIG. 4, the irradiation tester holds the fluorescent lamp 1 so that the distance between the fluorescent lamp 1 and the sample plate S is maintained at d = 75 mm, and can be electrically connected to the fluorescent lamp 1. It is configured.

The fluorescent lamp 1 uses a fluorescent lamp having a lamp length of 200 mm ± 2.5 mm and a glass tube 10 having a diameter of 20 mm. Specifically, the fluorescent layer 10a is (CaZn) ₃ (PO ₄ ) ₂ : TI ⁺ . Fluorescent lamp composed of a phosphor with a peak wavelength of 313 nm: FLR200T6BLB / M313, phosphor layer 10a composed of a phosphor with LaPO ₄ : Ce ³⁺ , and a fluorescent lamp with a peak wavelength of 318 nm: FLR200T6BLB / M318, phosphor layer 10a is composed of the phosphor of BaSi ₂ O ₅ : Pb ²⁺ and has a light characteristic indicated by a dotted line in FIG. 2 and has a peak wavelength of 351 nm, a fluorescent lamp: FLR200T6BLB / M351, and the phosphor layer 10a is composed of the SrB ₄ O ₇ : A fluorescent lamp composed of Eu ²⁺ phosphor and having a light characteristic indicated by a solid line in FIG. 2 and having a peak wavelength of 368 nm: FLR200T6BLB / M368, and the phosphor layer 10a is the BaSi ₂ O ₅ : Pb ²⁺ and a phosphor containing SrB ₄ O ₇ : Eu ^2+, and the blending weight ratio of the phosphor is BaSi ₂ O ₅ : SrB ₄ O ₇ = 5: 1, 3: 1, 1: 1 1: 5 fluorescent lamps: FLR200T6BLB / M · K3, FLR200T6BLB / M · K2, FLR200T6BLB / M · K, FLR200T6BLB / M · K4 were used.

  The sample plate S is obtained by applying urine to the surface of a rectangular test plate having a size of 100 mm × 100 mm, and includes five sample plates S to which five urine samples of subjects A to E are applied, and subjects A to E. Prepare a total of 6 sample plates S of the sample plate S of the subject F to which 5 people's urine was mixed and applied, and the brightness of the sample plate surface after 3 days, 10 days and 1.5 months after applying urine The value was measured.

  The method for measuring the luminance value is to first turn on the fluorescent lamp 1 for 10 minutes, then turn on the light for 3 minutes in the irradiation tester of FIG. 4 without arranging the sample plate S, and then the sample plate S is shown in FIG. Thus, the sample plate S was irradiated with light, and the luminance value of the surface of the sample plate emitted by this irradiation was measured. At this time, the luminance value was measured using a luminance meter BM-7 manufactured by Topcon Techno House Co., Ltd.

  As for the brightness of the sample plate surface, each sample plate S is irradiated with light by a fluorescent lamp (FLR200T6BLB / M351) having a peak wavelength of 351 nm, and the urine of the same subject is applied by selecting a location with a high brightness value. With respect to the same sample plate S, the luminance value of the same selected portion was measured in any fluorescent lamp.

  Here, the luminance ratio of the sample plates S of the subjects A to F when the sample plate S coated with urine in Table 1 is left for 3 days, and when the sample plate S coated with urine is left for 10 days in Table 2 below The luminance ratio of the sample plates S of the subjects A to F, and the luminance ratio of the sample plates S of the subjects A to F when the sample plate S coated with urine is left for 1.5 months are shown in Table 3 below. .

In Tables 1 to 3, the luminance ratio (%) was calculated by setting the highest luminance value among luminance values when light was irradiated with each fluorescent lamp in the same subject (same sample plate) as 100%.

As shown in Table 1, the sample plate S having a short urine contamination leaving time of 3 days has a small luminance ratio value in the fluorescent lamps having peak wavelengths of 313 nm and 318 nm, but the luminance ratio value in the other fluorescent lamps. In particular, fluorescent lamps having a phosphor blend weight ratio of BaSi ₂ O ₅ : SrB ₄ O ₇ = 5: 1 and 3: 1 had the highest luminance ratio.

In the case of the sample plate S that has been left for 10 days longer than that in Table 1, the urine contamination is left for 10 days, but as shown in Table 2, the fluorescent lamps having peak wavelengths of 313 nm and 318 nm have a small luminance ratio value, but other fluorescence In the lamp, the value of the luminance ratio was large. In particular, the fluorescent lamp having the phosphor blending weight ratio of BaSi ₂ O ₅ : SrB ₄ O ₇ = 3: 1 had the highest luminance ratio.

Furthermore, in the case of the sample plate S for 1.5 months in which the urine contamination is left for a longer period than in Table 2, as shown in Table 3, the luminance ratio value is small in the fluorescent lamps having peak wavelengths of 313 nm, 318 nm, and 351 nm. However, other fluorescent lamps had large brightness ratio values. In particular, a fluorescent lamp having a phosphor weight ratio of BaSi ₂ O ₅ : SrB ₄ O ₇ = 1: 1 has the highest luminance value.

  As shown in Tables 1 to 3 above, the fluorescent lamps having peak wavelengths of 313 nm and 318 nm have a small value of the luminance ratio, and it is difficult to visually recognize the degree of light emission on the sample plate surface, that is, to identify urine contamination. . As the urine contamination is left for a long time, the luminance ratio of the fluorescent lamp having the peak wavelength of 368 nm becomes larger than the luminance ratio of the fluorescent lamp having the peak wavelength of 351 nm, so that the urine contamination can be easily identified. became.

In particular, a fluorescent lamp in which the phosphor layer 10a is formed of a phosphor containing BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ²⁺ is left as compared with a single phosphor fluorescent lamp as described above. The luminance ratio of a large value was stably obtained regardless of the length of time, and it was easy to identify urine contamination. In addition, when the standing time is short, a phosphor having a peak wavelength of 351 nm, that is, a fluorescent lamp having a high blending ratio of SrB ₄ O ₇ has a larger luminance ratio value and can easily identify urine contamination. Accordingly, the value of the luminance ratio of the phosphor having a peak wavelength of 368 nm, that is, the fluorescent lamp having a high compounding ratio of BaSi ₂ O ₅ was increased, and it became easier to identify urine contamination.

Therefore, in order to emit more light from both urine contamination with a long standing time and urine contamination with a short standing time, light from both phosphors is formulated by blending BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ^2+. Further, the blending weight ratio thereof is preferably BaSi ₂ O ₅ : SrB ₄ O ₇ = 1: 9 to 9: 1, and BaSi ₂ O ₅ : SrB ₄ O ₇ = 1. : 5 to 5: 1 is more preferable. If the blending weight ratio of BaSi ₂ O ₅ : SrB ₄ O ₇ is 1: 9 to 9: 1, that is, if 10% or more of the smaller phosphor is included, both phosphors are blended. A good effect can be exhibited, and if it is 1: 5 to 5: 1, a sufficiently excellent effect can be exhibited as shown in Tables 1 to 3 above.

  In order to identify the urine contaminated area by irradiating light from the fluorescent lamp, irradiate light from the fluorescent lamp to the urine contaminated area, and visually observe light emission from the urine contaminated area irradiated with light. The urine contamination location may be identified by the light emission from the urine contamination contamination area irradiated with light from the fluorescent lamp by the light intensity measurement means (luminance measurement means) and the intensity of the emission (luminance) ) May be detected, and a location where the intensity (luminance) is greater than or equal to a predetermined value may be extracted and identified as a urine contamination location.

From the above, according to the fluorescent lamp for identifying urine contamination of the present invention, BaSi ₂ O ₅ : Pb, which is a phosphor that can easily identify urine contamination with a relatively short standing time, on the inner wall surface of the glass tube of the fluorescent lamp. ^Since a phosphor layer containing SrB ₄ O ₇ : Eu ²⁺ , which is a phosphor that can easily identify urine contamination with a relatively long standing time, is formed, the accuracy of identifying urine contamination can be improved regardless of the passage of time. Can be maintained.

  Thus, when the urine contamination region is identified by illuminating the urine by irradiating light from the fluorescent lamp for urinary contamination identification of the present invention to the urine contamination region where there is a possibility of urine contamination. Since both urine contamination that has not been performed and urine contamination that has passed over time can be made to emit light with higher intensity, the urine contamination site can be easily identified.

A perspective view showing a part of the fluorescent lamp 1 for identifying urine contamination broken away Phosphor layer _SrB 4 _O 7: ^{Eu 2+} or BaSi ₂ O _5: shows the emission spectra of the fluorescent lamp formed in phosphor ^{Pb 2+} as a light source, respectively The figure which shows the emission spectrum when the fluorescent lamp for urine contamination identification of FIG. 1 is used as a light source. Schematic diagram of irradiation tester

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Fluorescent lamp for urine contamination identification 10 Glass tube 10a Phosphor layer 11 Electrode part 12 Base part 13 Conductive substance

Claims (4)

A fluorescent lamp for urine contamination identification for irradiating light to identify urine contamination,
A fluorescent lamp for distinguishing urine contamination, characterized in that a phosphor layer containing BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ²⁺ is formed on the inner wall surface of the glass tube of the fluorescent lamp. BaSi ₂ O _5: ^{Pb 2+} and _SrB 4 _O 7: blending weight ratio of ^{Eu 2+} is 1: 9 to 9: 1 urine contamination identification fluorescent lamp according to claim 1, characterized in that. The fluorescent lamp for identifying urine contamination according to claim 1, wherein a blending weight ratio of BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ²⁺ is 1: 5 to 5: 1. Irradiating light to a urine-contaminated region from a fluorescent lamp in which a phosphor layer containing BaSi ₂ O ₅ : Pb ²⁺ and SrB ₄ O ₇ : Eu ²⁺ is formed on the inner wall surface of the glass tube;
A urine contamination identification method, wherein a urine contamination location is identified based on light emission from the urine contamination region.

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