JP2002098625A - Device for inspecting suspended dust detector - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a device for inspecting a suspended dust detector capable of reliably detecting the concentration of suspended particulates without replacing a concentration detecting means in a relatively compact circulating tank at maintenance over a long period. SOLUTION: In the device for inspecting the suspended dust detector, the operation of the suspended dust detector 6 provided with both a suspended particulate creating means 3 provided in the circulating tank 2 and the concentration detecting means 4 for detecting the concentration of suspended particulates inside the circulating tank 2 is inspected. The concentration detecting means 4 is an optical length measuring sensor device having both a light projecting part 41 for emitting laser beam light B of a predetermined width arranged in such a way as to intersect the path A of the suspended particulates inside the circulating tank 2 at approximately right angles and a light receiving part 42 for outputting an analogue signal corresponding to the width of light shielding by a light shielding body incident from the light projecting part 41.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention performs an operation test of a suspended dust detector by detecting and controlling the concentration of suspended particulates in a circulation tank by a suspended particulate generation means provided in the circulation tank by a concentration detection means. The present invention relates to a floating dust detector inspection device.

[0002]

2. Description of the Related Art Conventionally, as shown in FIG. 4, an apparatus for inspecting a floating dust detector as described above has an oil mist generator 102 as a means for generating suspended particles, and a photoelectric smoke detector for outputting an analog voltage as a concentration detecting means. There is a smoke detector inspection device 100 including a detector 103.

[0003] The smoke detector inspection apparatus 100 is installed in a manufacturing process of a photoelectric type or ion type smoke detector used for automatic fire alarm equipment, and is installed in a substantially closed circulation tank 101. In such a case, the concentration of paraffin mist generated from the oil mist generator 102 becomes uniform.
The oil mist generator 102 and the airflow generator 104 having a fan and the like are sequentially controlled based on the output signal from the photoelectric smoke detector 103 which is the concentration detection result. Then, the smoke detector 106 serving as a test work is placed in the circulation tank 101.
The smoke detector 106 is mounted at a predetermined position in the tank from the upper work mounting portion 105, and sensitivity adjustment or sensitivity inspection of the smoke detector 106 is performed.

[0004]

By the way, in the above-mentioned smoke detector inspection apparatus, according to the original standard based on the firefighting certification facility specifications, the floating particulate generation means heats the tape-shaped paper and the floating particulate density. It is preferable to use an extinction densitometer for the density detecting means for detecting the density. However, according to this, it is difficult to continuously generate smoke, that is, suspended particulates, for a long time.
The required detection distance is 50 compared to 300 mm width of one.
0 mm. Therefore, it is necessary to increase the size of the circulation tank, and further, there is a concern that the light emitted from the extinction densitometer may approach the test work and affect the sensitivity adjustment of the smoke detector 106 or the sensitivity inspection result.

[0005] According to the configuration of the above-mentioned conventional technique, the sensitivity adjustment or sensitivity inspection of the smoke detector can be continuously performed for a long time using the relatively small circulation tank 101. However, the photoelectric smoke detector 103, which is used as a substitute for the extinction rate densitometer and has an analog voltage output and is installed in the circulation tank, is contaminated by oil mist due to long-term use. If it becomes severe, accurate detection of suspended particulate concentration cannot be performed.

[0006] Therefore, in order to accurately perform the sensitivity adjustment or the sensitivity inspection of the smoke detector 106, it is necessary to replace the maintenance of the density detecting means at regular intervals. Further, since the photoelectric smoke detector 103 is disposed so as to protrude inside the circulation tank 101, turbulence of the air flow occurs inside. Therefore, there is a problem that it is difficult to detect a density equivalent to that of the test work due to a restriction on an installation position of the density detecting means.

The present invention has been made in view of the above circumstances, and it is an object of the present invention to accurately measure the concentration of suspended particulates in a relatively small circulating tank without performing maintenance replacement of the concentration detection means for a long period of time. It is an object of the present invention to provide a floating dust detector inspection device capable of detecting a dust.

[0008]

In order to achieve the above object, a floating dust detector inspection apparatus according to the present invention comprises: means for generating suspended fine particles provided in a circulation tank; A floating dust detector inspection device that performs an operation inspection of a floating dust detector including a concentration detection unit that performs concentration detection, wherein the concentration detection unit is substantially orthogonal to a floating particulate passage path inside the circulation tank. A light emitting unit that emits a laser beam light having a predetermined width, which is disposed as follows.
An optical length measurement sensor device having a light-blocking width of a light-blocking body for light incident from a light-projecting unit and a light-receiving unit that outputs a corresponding analog signal is provided.

In this configuration, the floating dust detector is provided so as to be substantially orthogonal to the floating fine particle passage inside the circulation tank, and emits a laser beam having a predetermined width, and the light emitting section. Control of floating particulate generation means provided in the circulating tank by concentration detection means by an optical length measuring sensor device having a light receiving part that outputs an analog signal corresponding to the light shielding width of the light incident from the light part by the light shielding body Then, suspended particulates are generated and the operation is inspected.

[0010] It is preferable that the light projecting unit and the light receiving unit are arranged so that the width direction of the laser beam is substantially perpendicular to the direction in which the floating fine particles pass. In this case, the light emitting section,
The light receiving section is arranged substantially orthogonal to the floating particulate passage in the circulation tank, and the width direction of the laser beam having a predetermined width therebetween is substantially orthogonal to the floating particulate passing direction.

It is preferable that the light projecting section and the light receiving section are arranged at a position on the passing path substantially immediately before a floating dust detector serving as an inspection work. In this case, a light projecting unit that emits a laser beam having a predetermined width and that is disposed substantially orthogonal to the floating fine particle passage path inside the circulation tank, and a light receiving unit that enters from the light projecting unit are located on the passage path. The laser beam is arranged almost immediately before the floating dust detector serving as the inspection work so that the width direction of the laser beam light therebetween is substantially perpendicular to the floating particle passing direction.

[0012]

1 to 3 show an embodiment corresponding to all of claims 1 to 3 of the present invention, and FIG.
FIG. 2 is a schematic configuration diagram illustrating a floating dust detector inspection device according to an embodiment of the present invention. FIG. 2 is an explanatory diagram illustrating a concentration detection unit used in the floating dust detector inspection device. FIG. It is explanatory drawing which shows the effect | action of the density | concentration detection means used for a container inspection apparatus.

A floating dust detector inspection apparatus 1 according to this embodiment includes a floating fine particle generator 3 provided in a circulation tank 2.
A floating dust detector inspection apparatus for performing an operation inspection of a floating dust detector 6 including a concentration detection means 4 for detecting a concentration of suspended fine particles inside the circulation tank 2, wherein the concentration detection means 4 comprises: A light projecting unit 41 that emits a laser beam light B having a predetermined width and is disposed substantially orthogonal to the floating fine particle passage path A inside the circulation tank 2, and a light shield for light incident from the light projecting unit 41. The optical length measuring sensor device 4 includes a light receiving portion 42 that outputs an analog signal corresponding to the light shielding width.

In the floating dust detector inspection apparatus 1 according to the embodiment, the light projecting portion 41 and the light receiving portion 42 are arranged so that the laser beam light B has a width direction substantially orthogonal to a floating fine particle passing direction. They are also placed. Further, in the floating dust detector inspection device 1 of the embodiment, the light emitting unit 41,
The light receiving section 42 is arranged at a position on the passing path A substantially immediately before the floating dust detector 6 serving as an inspection work.

More specifically, this floating dust detector inspection device 1
In the manufacturing process of the photoelectric smoke detector 6 which is one of the floating dust detectors 6 described in the section of the prior art, the sensitivity is adjusted or the sensitivity is inspected. The apparatus includes an airborne particle generating means 3, an optical length measuring device 4 as a concentration detecting means, and an airflow generating means 5 formed by a blower or the like for generating a circulating airflow in the tank. In addition, the floating dust detector inspection device 1 of the present invention is not limited to the one that performs the sensitivity adjustment or the sensitivity inspection of the photoelectric smoke detector 6, and the floating dust detection device mounted on an air purifier or the like. The present invention can also be applied to a device for performing sensitivity adjustment or sensitivity inspection, such as a dust meter that measures the amount of suspended dust.

The circulating tank 2 has a curved portion 22 having a plurality of semicircular curved rectifying ridges 23 of a predetermined height for rectifying a circulating air flow inside an outer case 21 made of FRP material, wood material or the like. , 22 on both sides, and its curved portion 2
An optical length measuring sensor device 4 to be described later is arranged in the middle upper portion serving as the connecting portion 24 between the two, 22 together with the photoelectric smoke detector 6 of the inspection work, and the suspended particulate generation means 3 and the airflow generating means 5 are arranged in the middle lower portion. Has been established. In addition, between the curved portion 22 in the middle upper part and the photoelectric smoke detector 6, an agitating projection 25 is provided on the inner surface of the connecting portion 24 for appropriately agitating the circulating airflow to make the concentration of the suspended particulates more uniform. Further, an opening / closing lid 26 for providing the floating dust detector 6 inside the circulation tank 2 is provided on the upper surface of the intermediate upper part.

In this case, the suspended particulate generation means 3 is controlled to heat a constant amount of paraffin oil supplied from an oil supply unit to a predetermined temperature by the oil mist generator described in the section of the prior art. It is electrically heated by a heater to generate paraffin mist of suspended particulates. That is, when the photoelectric smoke detector 6 is provided inside the circulation tank 2, the paraffin mist that flows out of the tank or is slightly attached to the inside of the circulation tank 2 and reduced is appropriately supplemented. The heater is controlled so that the mist concentration becomes uniform. In addition, this suspended particulate generation means 3 is not limited to the above oil mist generator,
Heat may be generated by heating a tape-shaped paper or the like to generate smoke.

The optical length measuring sensor device 4 is a concentration detecting means for detecting the concentration of paraffin mist in the circulating tank 2. In this case, the power supply of the heater provided in the oil mist generating device is controlled by the optical type. It is controlled by the output of the length measuring sensor device 4. As shown in FIG. 2, the optical length measuring sensor device 4 emits a laser beam light B of a single wavelength infrared light having a wavelength of 780 nm and a width of 15 mm in a vertical direction from a light projecting window 44 thereof. Light emitting unit 41
And a light receiving section 42 for receiving the laser beam B from an entrance window (not shown). The light transmitting section 41 and the light receiving section 42 are formed of a transparent window 4 made of a transparent acrylic resin plate or the like.
3 and 43, the floating fine particle passage route A (see FIG. 1)
Of the photoelectric smoke detector 6 almost immediately before the photoelectric smoke detector 6
The laser beam B inside the circulation tank is fixed to a predetermined position on the outer side surface of the circulation tank 2 so that the laser beam light B inside the circulation tank is substantially orthogonal to the passage path A at a position in front of the smoke sensing unit provided below. Accordingly, since the laser beam light B has a single wavelength and is in the form of a beam, even if the light projecting part 41 and the light receiving part 42 are arranged close to the photoelectric smoke detector 6, the photoelectric smoke detector 6 can be used. It does not affect the detection performance.

In the case of the optical length measuring sensor device 4, FIG.
As shown in FIG. 5, a voltage signal of 5 V is applied when the laser beam light B fully enters a light receiving window (not shown) provided in the light receiving unit 42, and a voltage signal of 1 V is applied when the laser beam light B is completely shielded.
Output an analog signal corresponding to the length of the light shielding object. Therefore, the light emitting unit 41 and the light receiving unit 4
In the case where floating particulates exist between the two, a voltage signal of 1 V or more is output in accordance with the concentration of the floating particulates.

In the above-mentioned floating dust detector inspection device 1, first, power is supplied to the heater of the oil mist generator and the fan of the blower which is the air flow generating means 5, and paraffin mist is generated. Then, a laser beam having a predetermined width, which is disposed so that the concentration of paraffin mist of the circulating airflow having a predetermined flow velocity inside the circulation tank 2 is substantially orthogonal to the floating fine particle passage path A inside the circulation tank 2. Density detection by an optical length measuring sensor device 4 including a light projecting unit 41 that emits light B, and a light receiving unit 42 that outputs an analog signal corresponding to a light blocking width of a light incident from the light projecting unit 41 by a light blocking member. The oil mist generator and the airflow generator 5 are controlled so that the result is constant. That is, when the density detection result becomes constant, the operation inspection of the photoelectric smoke detector 6 of the inspection work installed from the opening / closing lid 26 is performed.

At this time, the light projecting section 41 and the light receiving section 42
Is substantially orthogonal to the floating particulate passage path A inside the circulation tank 2,
The laser beam light B having a predetermined width therebetween is arranged so that the width direction of the laser beam light B is substantially orthogonal to the floating particle passing direction, and therefore, the cross section of the floating particle passing path A inside the circulation tank 2 has a wide cross section. The average value of the concentration of the suspended particulates over the range is detected by the optical length measuring sensor device 4, and the control of the production of the suspended particulates by the oil mist generator and the airflow generating means 5 is favorably performed.

Further, the light projecting section 41 and the light receiving section 42
Is arranged almost immediately before the photoelectric smoke detector 6 in the floating particulate passage route A so that the 15 mm width direction of the laser beam light B therebetween is substantially perpendicular to the floating particulate passing direction. The photoelectric smoke sensor 6 has a laminar flow-like more uniform concentration of suspended fine particles in the floating fine particle passage without being affected by the turbulence generated thereby and without being affected by the laser beam light B. A sensitivity adjustment or a sensitivity test is performed.

Therefore, according to the inspection apparatus 1 for a floating dust detector described above, the photoelectric smoke detector 6 has a predetermined width and is disposed substantially orthogonal to the floating particulate passage A in the circulation tank 2. A light projecting unit 41 for emitting the laser beam light B, and a light receiving unit 42 for outputting an analog signal corresponding to the light blocking width of the light incident from the light projecting unit 41 by the light blocking member.
The floating particle generating means 3 provided in the circulating tank 2 is controlled by the concentration detecting means by the optical length measuring sensor device 4 equipped with In the tank 2, the concentration of suspended particulates can be accurately detected without performing maintenance replacement of the concentration detecting means for a long period of time.

The light projecting unit 41 and the light receiving unit 42
Since the laser beam light B having a predetermined width therebetween is substantially orthogonal to the floating fine particle passage path A inside the circulation tank 2 and the width direction of the laser beam light B is substantially orthogonal to the floating fine particle passing direction, the circulation tank 2 is arranged. The average value of the concentration of the suspended particulates over a wide range in the cross section of the passage path A inside the suspended particulates is detected, and the production of the suspended particulates is controlled. In addition, circulation tank 2
A light projecting unit 41 that emits a laser beam light B having a predetermined width and that is disposed substantially orthogonal to the internal floating fine particle passage path A, and a light receiving unit 42 that enters from the light projecting unit 41, The circulating tank 2 is arranged almost immediately before the photoelectric smoke detector 6 serving as an inspection work so that the width direction of the laser beam light therebetween is substantially perpendicular to the direction in which the suspended particulates pass.
Inside, the photoelectric smoke detector 6 of the inspection work is subjected to sensitivity adjustment or sensitivity inspection with a laminar more uniform concentration of the floating particles in the floating particle passage A without being affected by the turbulence generated thereby. You.

[0025]

The present invention is embodied as in the above-mentioned embodiment. In the inspection apparatus for the suspended dust detector according to the first aspect, maintenance of the concentration detecting means is performed for a long period in a relatively small circulation tank. The concentration of suspended particulates can be accurately detected without replacement.

In the inspection apparatus for a suspended dust detector according to a second aspect, the light projecting section and the light receiving section are substantially orthogonal to the passage of the suspended particulates in the circulation tank and have a predetermined width therebetween. Since the laser beam light is arranged so that the width direction of the laser beam is substantially perpendicular to the direction in which the suspended particles pass, the average value of the concentration of suspended particles over a wide range in the cross section of the passage of the suspended particles inside the circulation tank is detected. Control of suspended particulate generation is provided.

According to the third aspect of the present invention, there is provided a floating dust detector inspection apparatus which emits a laser beam having a predetermined width, which is disposed substantially orthogonal to a floating fine particle passage in the circulation tank. The light part and the light receiving part incident from the light projecting part are located almost immediately before the floating dust detector serving as the inspection work in the passage path, and the width direction of the laser beam light therebetween is substantially orthogonal to the floating particle passing direction. So that the floating dust detector of the inspection work inside the circulation tank is not affected by the turbulence caused by it, and the sensitivity is adjusted with a more uniform concentration of the suspended particles in the laminar flow path in the passage of the suspended particles. Alternatively, a sensitivity test is performed.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing a floating dust detector inspection device according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram showing a concentration detecting means used in the floating dust detector inspection device.

FIG. 3 is an explanatory diagram showing an operation of a concentration detecting means used in the floating dust detector inspection device.

FIG. 4 is a schematic configuration diagram showing a floating dust detector inspection device as a conventional example of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Suspended dust detector inspection device 2 Circulation tank 3 Suspended particulate generation means 4 Optical length measuring sensor device (concentration detection means) 41 Light emitting unit 42 Light receiving unit 6 Photoelectric smoke detector (Floating dust detector) A Passing suspended particulate Path B Laser beam light

Claims (3)

[Claims] 1. A floating dust detector test for performing an operation test of a floating dust detector provided with a floating fine particle generating means provided in a circulation tank and a concentration detection means for detecting a concentration of the floating fine particles inside the circulation tank. An apparatus, comprising: a light projecting unit that emits a laser beam having a predetermined width, which is disposed substantially orthogonal to a floating fine particle passage path inside the circulation tank, wherein the concentration detecting unit is incident on the light projecting unit. A floating dust detector inspection device, comprising: an optical length measuring sensor device having a light-shielding width of a light to be emitted and a light-receiving unit for outputting a corresponding analog signal. 2. The floating dust detector inspection device according to claim 1, wherein a light projecting unit and a light receiving unit are arranged so that a width direction of the laser beam is substantially orthogonal to a direction of passing the floating fine particles. 3. The floating dust detector inspection device according to claim 2, wherein the light projecting unit and the light receiving unit are arranged at a position of the passing path substantially immediately before the floating dust detector serving as an inspection work.