JP2017009521A - Detection device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a detection device capable of prolong the lifetime of a member used for collection of particles even when used in a place where air is contaminated.SOLUTION: A detection device for detecting particles originating from a living body comprises: a collection part which collects particles in air; a calculation part which calculates the amount of particles, originating from the living body, included in the particles collected by the collection part on the basis of fluorescence intensity before and after heating of the collected particles; and a setting part which sets a collection time for which the particles in air are collected by the collection part. When the collection time is set to a first time and the amount of the particles, originating from the living body, calculated by the calculation part is equal to or larger than a first threshold, the setting part changes the collection time to a second time shorter than the first time.SELECTED DRAWING: Figure 26

Description

  The present disclosure relates to a detection device, and more particularly, to a detection device that detects biologically derived particles.

  JP-A-2003-337086 (Patent Document 1) is a prior art document that discloses an apparatus for collecting suspended particulate matter in the atmosphere. The airborne particulate matter collection device described in Patent Document 1 is arranged in a collection container, a pump that sucks air into the collection container, and the collection container. A discharge electrode that generates and charges floating particulate matter in the collection container, and a dust collection electrode that draws and collects the suspended particulate matter charged in the collection container by applying a potential difference to the discharge electrode With. This dust collecting electrode is composed of a transparent member having a recess formed on the surface and a transparent electrode film coated on at least the bottom surface of the recess.

JP 2003-337086 A

  However, when the collection device according to Patent Document 1 is used in a place where air is contaminated, there is a problem that the life of the dust collection electrode used for collection is shortened.

  The present disclosure has been made in view of the above problems, and is capable of extending the life of a member used for collecting particles even when used in a place where air is contaminated. An object is to provide an apparatus.

  According to one embodiment, a detection device for detecting biologically derived particles is provided. The detection device collects particles in the air, and based on the fluorescence intensity before and after heating of the particles collected by the collection unit, the biological particles contained in the collected particles A calculation unit that calculates the amount; and a setting unit that sets a collection time during which particles in the air are collected by the collection unit. When the collection time is set to the first time, and the amount of the biological particle calculated by the calculation unit is equal to or greater than the first threshold, the setting unit sets the first time Change the collection time to a shorter second time.

  According to the present disclosure, it is possible to extend the life of a member used for collecting particles even when used in a place where air is contaminated.

It is a graph which shows the fluorescence intensity of the particle | grains of biological origin before a heating and after a heating. It is a graph which shows the fluorescence intensity of the dust before a heating and after a heating. It is a schematic diagram for demonstrating a collection process. It is a schematic diagram for demonstrating the fluorescence measurement process before a heating. It is a schematic diagram for demonstrating a heating process. It is a schematic diagram for demonstrating the fluorescence measurement process after a heating. It is a graph which shows the correlation with the increase amount of the fluorescence amount by heating, and the density | concentration of the particle | grains of biological origin. It is a perspective view which shows the external appearance of the detection apparatus according to Embodiment 1. FIG. It is the perspective view which looked at the detection apparatus from the direction different from FIG. It is the perspective view seen from the same direction as FIG. 9 in the state which removed the fan from the detection apparatus. It is the disassembled perspective view seen from the same direction as FIG. 8 which shows the structure of a detection apparatus. It is the fragmentary perspective view which looked at the detection apparatus of FIG. 11 from the arrow XII direction. It is a disassembled perspective view which shows the structure of a collection part and a heating part. It is a bottom view which shows the external appearance of a collection part and a heating part. It is a partial top view which shows the connection state of a collection board | substrate and a heater. It is the figure which looked at the collection board | substrate and heater of FIG. 15 from the arrow XVI direction. It is a disassembled perspective view which shows the attachment state of each structure of a detection apparatus. It is the figure which looked at the detection apparatus of FIG. 17 from arrow XVIII. It is a perspective view which shows the state to which the collection part and the movement part were connected. It is sectional drawing which looked at the state where the collection board | substrate is located in the 1st position from the downward direction of the collection board | substrate. It is sectional drawing which looked at the state where the collection board | substrate is located in the 2nd position from the downward direction of the collection board | substrate. It is sectional drawing which looked at the state where the collection board | substrate is located in the 3rd position from the downward direction of the collection board | substrate. It is sectional drawing which looked at the state where a collection board is located in the 4th position from the lower part of a collection board. It is a block diagram which shows an example of a function structure of the control part for controlling the detection apparatus according to this Embodiment. 5 is a flowchart showing a flow of detection operation of the detection device according to the first embodiment. 5 is a flowchart showing a flow of detection operation of the detection device according to the first embodiment. It is sectional drawing which shows the state which has arrange | positioned the collection board | substrate in the 1st position which is a collection position in the detection apparatus according to this embodiment. It is a perspective view for demonstrating the structure inside the collection cylinder according to Embodiment 2. FIG. It is sectional drawing which looked at the collection cylinder of FIG. 28 from the XXIX direction. It is sectional drawing which looked at the collection cylinder of FIG. 28 from XXX direction. It is a figure for demonstrating the structure of the collection cylinder according to Embodiment 3. FIG. It is a figure which shows the engagement example (the 1) with the hole of the collection cylinder of FIG. 31, and a conductor. It is a figure which shows the example of engagement (the 2) with the hole of the collection cylinder of FIG. 31, and a conductor. FIG. 10 is a diagram for illustrating a configuration of a collecting cylinder according to a first modification of the third embodiment. It is a figure for demonstrating the structure of the collection cylinder according to the modification 2 of Embodiment 3. FIG. FIG. 10 is a diagram for illustrating a configuration of a collecting cylinder according to a third modification of the third embodiment. It is a figure for demonstrating the structure of the collection cylinder according to the modification 4 of Embodiment 3. FIG. It is a figure for demonstrating the structure of the collection cylinder according to Embodiment 4. FIG. It is a figure for demonstrating the structure of the collection cylinder and the introduction member according to Embodiment 5. FIG. FIG. 10 is a perspective view of an introduction member according to the fifth embodiment. It is a figure for demonstrating the structure of the collection cylinder according to Embodiment 6, an introduction member, and a joining member. It is the figure which looked at the joining member in FIG. 41 from arrow XLII. It is the figure which looked at the joining member in FIG. 41 from arrow XLIII.

  Embodiments of the present invention will be described below with reference to the drawings. In the following description, the same parts and components are denoted by the same reference numerals. Their names and functions are also the same. Therefore, these descriptions will not be repeated.

<Detection principle>
The detection principle of the particle | grains derived from a living body in the detection apparatus concerning this Embodiment is demonstrated using FIGS. Biologically derived particles are particles derived from organisms containing microorganisms and fungi such as mold and pollen, and do not include dust such as minerals and refined petroleum products.

  The particles floating in the air are mixed particles of dusts such as minerals and refined petroleum products and biological particles. In order to measure the amount of biological particles contained in the mixed particles, when the mixed particles are irradiated with ultraviolet light or blue light, the biological particles in the mixed particles emit fluorescence. However, the mixed particles include chemical fiber dust (hereinafter also referred to as dust) that emits fluorescence in addition to biological particles. Therefore, it is impossible to accurately measure the amount of biologically derived particles only by detecting the fluorescence emitted from the mixed particles.

  Therefore, in the detection apparatus according to the present embodiment, the fluorescence intensity (fluorescence amount) changes (increases) when biological particles are heated, and the fluorescence intensity does not change even when dust such as chemical fibers is heated. Measure the amount of biological particles using the measurement principle using

  FIG. 1 is a graph showing fluorescence intensity of biological particles before and after heating. FIG. 2 is a graph showing the fluorescence intensity of the dust before and after heating. 1 and 2, the vertical axis indicates the fluorescence intensity, and the horizontal axis indicates the wavelength of the fluorescent light.

  Referring to FIG. 1, with respect to the fluorescence amount of biological particles, the fluorescence amount after heating is remarkably increased in comparison with the fluorescence amount before heating in a wide wavelength range. On the other hand, referring to FIG. 2, with respect to the fluorescence amount of dust, the fluorescence amount after heating and the fluorescence amount before heating are substantially the same. Therefore, by measuring the amount of fluorescence before heating of the mixed particles and the amount of fluorescence after heating, and obtaining the difference between the amount of fluorescence before heating and the amount of fluorescence after heating, the biological particles contained in the mixed particles The amount of can be calculated.

  Hereinafter, each step of the method for measuring the amount of biological particles will be described. The method of measuring the amount of biological particles includes the step of collecting mixed particles, the step of measuring fluorescence of mixed particles before heating, the step of heating mixed particles, the step of measuring mixed particles after heating, and the step of measuring fluorescent particles of biological particles. A step of calculating the amount of. Preferably, the method for measuring the amount of biological particles further includes a step of measuring fluorescence intensity before collection as a pre-step of the step of collecting mixed particles.

  FIG. 3 is a schematic diagram for explaining the collection process. FIG. 4 is a schematic diagram for explaining the fluorescence measurement process before heating. FIG. 5 is a schematic diagram for explaining the heating step. FIG. 6 is a schematic diagram for explaining the fluorescence measurement process after heating. FIG. 7 is a graph showing the correlation between the amount of increase in fluorescence due to heating and the concentration of biological particles. The vertical axis in FIG. 7 indicates the amount of increase in the fluorescence amount due to heating, and the horizontal axis indicates the concentration of biological particles.

  With reference to FIG. 3, the detection device collects the mixed particles floating in the air on the collection substrate 510 in the collection step. In this step, the collection substrate 510 is disposed at a position facing the electrostatic needle 530. A DC power source 540 is connected to the collection substrate 510 and the electrostatic needle 530. Thereby, a potential difference is generated between the collection substrate 510 and the electrostatic needle 530. For example, the positive electrode of the DC power source 540 is connected to the electrostatic needle 530, and the negative electrode of the DC power source 540 is connected to the collection substrate 510.

  The detection device drives the fan 500 located below the collection substrate 510. Thereby, external air is introduced so as to pass around the electrostatic needle 530 toward the collection substrate 510. The mixed particles 600 floating in the air are charged with a positive charge around the electrostatic needle 530. The collection substrate 510 has a charge opposite to that of the charged mixed particles 600. Therefore, the charged mixed particles 600 are collected by adhering to the surface of the collection substrate 510 by electrostatic force. The mixed particles 600 collected on the collection substrate 510 include biological particles 600A and dust 600B such as chemical fiber dust.

  Referring to FIG. 4, the detection apparatus irradiates excitation light toward mixed particles 600 collected on light-collecting substrate 510 from light-emitting element 550 such as a semiconductor laser in a fluorescence measurement step before heating. The detection device collects the fluorescence emitted from the mixed particles 600 irradiated with the excitation light with the lens 560 and receives the light with the light receiving element 565.

  Referring to FIG. 5, the detection apparatus heats collection substrate 510 with heater 520 attached to the lower surface of collection substrate 510 in the heating step. Thereby, the mixed particles 600 collected on the collection substrate 510 are heated. The detection apparatus air-cools the collection substrate 510 after heating.

  Referring to FIG. 6, the detection apparatus irradiates excitation light toward mixed particles 600 collected on light-collecting substrate 510 from light-emitting element 550 in the fluorescence measurement step after heating. The detection device collects the fluorescence emitted from the mixed particles 600 irradiated with the excitation light with the lens 560 and receives the light with the light receiving element 565.

Referring to FIG. 7, in the step of calculating the amount of biological particles, the detection device measures in the fluorescence measurement step after heating based on the relationship between the increase amount ΔF of the fluorescent amount and the biological particle concentration N From the difference ΔF1 obtained by subtracting the first fluorescence amount measured in the fluorescence measurement step before heating from the second fluorescence amount thus obtained, the concentration (particles / m ³ ) of biological particles is calculated. The correlation between the increase amount ΔF and the biological particle concentration N is obtained by conducting an experiment in advance.

[Embodiment 1]
A detection apparatus according to the first embodiment using the above-described method for detecting biologically-derived particles will be described. In the drawings referred to in the following embodiments, the same or corresponding members are denoted by the same reference numerals and description thereof will not be repeated. For convenience of explanation, the upper and lower expressions are used, but this is based on the referenced drawings and does not limit the configuration of the invention.

  FIG. 8 is a perspective view showing an appearance of detection device 100 according to the first embodiment. FIG. 9 is a perspective view of the detection device 100 viewed from a direction different from that in FIG. 10 is a perspective view seen from the same direction as FIG. 9 with the fan removed from the detection device 100. FIG. FIG. 11 is an exploded perspective view showing the configuration of the detection apparatus 100 as seen from the same direction as FIG. FIG. 12 is a partial perspective view of the detection device 100 of FIG. 11 viewed from the direction of the arrow XII.

  With reference to FIGS. 8 to 12, detection device 100 according to the first embodiment includes housing 110, fan 120 for realizing an exhaust function, discharge unit 142, collection unit 177, and irradiation unit 130. A fluorescence detection unit 160, a heating unit 188, a control unit 202, a moving unit 178, and a cleaning unit 153.

  The control unit 202 is mounted on the rigid board 200 as an example. The control unit 202 may be a general computer that is electrically connected to the detection apparatus 100. The control unit 202 controls a signal processing unit (see FIG. 24) that is electrically connected to the light receiving element 163 included in the fluorescence detection unit 160 and can process a sensor signal from the light receiving element 163, and the entire detection apparatus 100. And a measurement unit (see FIG. 24) for performing a process of measuring the amount of biological particles. In the present embodiment, the control unit 202 is disposed on the rigid board 200. However, the control unit 202 may be attached to the lid 111 inside the housing 110, for example, It may be arranged outside.

  The housing 110 includes a lid portion 111 having an introduction port 111a and a discharge port 112a facing the introduction port 111a, and includes a main body portion 112 that is combined with the lid portion 111 and has a box shape. The housing 110 further includes a rigid substrate 200 fixed on the lid portion 111. A ground electrode 210 is provided on the rigid substrate 200. The ground electrode 210 is electrically connected to a conductor described later by a wiring 192. The wiring 192 is formed from a conductive member such as copper foil or aluminum foil.

  The casing 110 has a substantially rectangular parallelepiped shape, and houses the discharge unit 142, the collection unit 177, the irradiation unit 130, the fluorescence detection unit 160, the heating unit 188, the moving unit 178, and the cleaning unit 153. The main body 112 has an opening on the side opposite to the discharge port 112a. The lid portion 111 has a flat plate shape that closes the opening of the main body portion 112. For example, the housing 110 has a size of 60 mm × 50 mm (length and width of the lid portion 111) × 30 mm (height).

  The collection tube 190 is connected to the lid portion 111 so as to be orthogonal to each other. In the casing 110, the collection tube 190 extends in a cylindrical shape toward the main body 112 so as to be continuous with the introduction port 111a. The collection tube 190 is provided so as to surround a tip portion of an electrostatic needle 140 described later. The collection tube 190 guides the air containing the mixed particles toward the collection substrate 170 positioned with respect to the electrostatic needle 140. The housing 110 and the collecting cylinder 190 are made of an electrically insulating material such as an epoxy resin.

  The collection tube 190 includes an electrically grounded conductor 191 that is provided on the inner peripheral surface of the collection tube 190 and is located at a distance from the tip of the electrostatic needle 140. The conductor 191 is connected to the wiring 192 by solder. In the present embodiment, the conductor 191 has a sheet-like shape and is attached to the inner peripheral surface of the collection tube 190.

  In the present embodiment, the conductor 191 is located on the opposite side of the collection cylinder 190 through which the electrostatic needle 140 penetrates, as will be described later, in the radial direction of the collection cylinder 190. However, the arrangement of the conductors 191 is not limited to the above, and it is sufficient that the conductors 191 are positioned at a distance from the tip of the electrostatic needle 140 so as to constitute the inner peripheral surface of the collection tube 190.

  The conductor 191 is located closer to the introduction port 111a than the electrostatic needle 140 in the extending direction of the collection tube 190. That is, the conductor 191 is positioned on the windward side of the electrostatic needle 140 with respect to the air flow introduced into the housing 110 from the introduction port 111a as will be described later. The conductor 191 does not overlap with a virtual extension line obtained by extending the electrostatic needle 140.

  In the present embodiment, the conductor 191 is made of copper, but the material of the conductor 191 is not limited to copper, and may be any material having high electrical conductivity such as aluminum.

  The fan 120 for realizing the exhaust function exhausts the air in the housing 110 from the exhaust port 112a. The fan 120 can be driven to rotate in the forward direction and the reverse direction. By driving the fan 120 in the forward rotation direction, the air inside the casing 110 is discharged to the outside of the casing 110 through the fan 120. By driving the fan 120 in the reverse direction, air outside the housing 110 is introduced into the housing 110 through the fan 120. The fan 120 is attached to the position of the discharge port 112a of the main body 112. The fan 120 is electrically connected to the control unit 202, and the rotation drive of the fan 120 is controlled by the control unit 202.

  The discharge part 142 is located in the housing | casing 110, and charges the mixed particle contained in the air introduce | transduced in the housing | casing 110 from the inlet 111a by exhaust of the fan 120. FIG. The discharge unit 142 includes a high-voltage DC power supply 141 as a power supply unit and an electrostatic needle 140 as a discharge electrode. The electrostatic needle 140 extends from the high-voltage DC power supply 141, penetrates a part of the collection tube 190 and reaches the inside of the collection tube 190. In the present embodiment, the electrostatic needle 140 penetrates from the outside to the inside of the collecting tube 190 in the vicinity of the center in the extending direction of the collecting tube 190. The tip of the electrostatic needle 140 extends in the radial direction of the collection tube 190.

  The positive electrode of the high-voltage DC power supply 141 is connected to the electrostatic needle 140. Note that the negative electrode instead of the positive electrode of the high-voltage DC power supply 141 may be connected to the electrostatic needle 140. Since the collection substrate 170 is electrically connected to the high-voltage DC power supply 141 and a heater 180 described later, a potential difference is generated between the collection substrate 170 and the electrostatic needle 140. A switch (not shown) is disposed between the high-voltage DC power supply 141 and the electrostatic needle 140, and power supply to the electrostatic needle 140 is turned ON / OFF by turning the switch ON / OFF. The switch is electrically connected to the control unit 202, and ON / OFF of the switch is controlled by the control unit 202.

  The irradiation unit 130 is located in the housing 110 and irradiates excitation light toward the mixed particles attached to the collection substrate 170. The irradiation unit 130 includes a light emitting element 131 as a light source, an element frame 132, a lens frame 133, a condenser lens 134, and a lens holder 135.

  As the light emitting element 131, a semiconductor laser, an LED (Light Emitting Diode) element, or the like is used. The light emitted from the light emitting element 131 may have a wavelength in either the ultraviolet or visible region as long as it excites biological particles to emit fluorescence. The light emitting element 131 is electrically connected to the control unit 202, and light emission from the light emitting element 131 is controlled by the control unit 202.

  The fluorescence detection unit 160 is located in the housing 110 and detects fluorescence emitted from the mixed particles irradiated with excitation light. The fluorescence detection unit 160 includes a noise shield 161, an amplifier circuit 162, a light receiving element 163, a light receiving frame 164, a Fresnel lens 165, and a lens presser 166. As the light receiving element 163, a photodiode or an image sensor is used. The light receiving element 163 is electrically connected to the signal processing unit of the control unit 202, and inputs a sensor signal representing the received fluorescence intensity to the signal processing unit.

  The moving unit 178 moves the collection substrate 170. The moving mechanism includes a motor holder 175, a rotation motor 174 as a rotation drive unit, and a motor presser 173. The rotation motor 174 is connected to the rotation base 172 of the collection unit. The rotation motor 174 is electrically connected to the control unit 202, and the rotation drive of the rotation motor 174 is controlled by the control unit 202.

  The cleaning unit 153 removes the mixed particles that have finished detecting the fluorescence after heating from the collection substrate 170. The cleaning unit 153 includes a brush 150, a brush press 151, and a brush fixing unit 152. The brush 150 is sandwiched between a brush press 151 and a brush fixing portion 152 and fixed at one end. The cleaning unit 153 is fixed to the lower surface of the high-voltage DC power supply 141.

  The brush 150 is formed from a fiber assembly. The brush 150 is formed from a fiber assembly having conductivity. The brush 150 is made of, for example, carbon fiber. The fiber aggregate forming the brush 150 preferably has a diameter of φ0.05 mm or more and φ0.2 mm or less. By using the conductive brush 150, the charge of the charged mixed particles can be removed.

  FIG. 13 is an exploded perspective view showing the configuration of the collection unit 177 and the heating unit 188. FIG. 14 is a bottom view showing the appearance of the collection unit 177 and the heating unit 188. FIG. 15 is a partial plan view showing a connection state between the collection substrate 170 and the heater 180. FIG. 16 is a view of the collection substrate 170 and the heater 180 of FIG. 15 as viewed from the direction of the arrow XVI.

  The collection unit 177 includes a collection substrate 170 that is a collection member, and collects the charged mixed particles by attaching them to the collection substrate 170 by electrostatic force. The collection substrate 170 is formed from a glass plate. A conductive transparent film is formed on the surface of the glass plate.

  The collection substrate 170 is not limited to glass, and may be formed of ceramic or metal. The film formed on the surface of the collection substrate 170 is not limited to a transparent film, and for example, a metal film may be formed. Moreover, when the collection board | substrate 170 is formed from a metal, it is not necessary to form a film on the surface.

  The collection substrate 170 is fixed on the substrate holder 171. The substrate holder 171 is connected to a rotation base 172 connected to the moving unit 178. An arm portion 176 bulges from the rotation base 172. The substrate holder 171, the rotation base 172, and the arm portion 176 are integrally formed of a resin material. The collection unit 177 includes a substrate holder 171, a rotation base 172, and an arm unit 176.

  The collection part 177 has an engagement hole 172a, which is an engaged part engaged with an output shaft 174a of a rotary motor 174, which will be described later, in the rotation base 172. Moreover, the collection part 177 has the collection board | substrate 170 in the position distant from radial direction centering | focusing on the engagement hole 172a.

  Referring to FIGS. 13 and 14, arm portion 176 extends in the radial direction with engagement hole 172 a of rotation base 172 as the rotation center. The arm portion 176 is provided at a position shifted in the circumferential direction from the substrate holder 171 around the axis of the shaft portion 172b. The arm portion 176 has a thin arm tip 176a at the tip.

  The heating unit 188 includes a heater 180. The heater 180 is positioned so as to be in contact with the collection substrate 170 and heats the mixed particles attached to the collection substrate 170. In the present embodiment, the heater 180 is attached to the lower surface of the collection substrate 170.

  The heater 180 is a power supply wiring to the heater 180 and includes a high potential side wiring 181 and a low potential side wiring 182 through which a direct current flows, and a signal line 183 of a temperature sensor built in the heater 180. The high potential side wiring 181, the low potential side wiring 182, and the signal line 183 are connected to one end of a flexible printed wiring board 184 that is a flat wiring that can follow the rotation of the collection board 170. The surface of the flexible printed wiring board 184 is orthogonal to a plane including the radial direction with the engagement hole 172a as the rotation center.

  The other end of the flexible printed wiring board 184 is drawn out of the housing 110 and is electrically connected to the control unit 202 and a DC power source. The temperature sensor built in the heater 180 detects the temperature of the collection board 170 and inputs a sensor signal representing the temperature of the collection board 170 to the control unit 202 through the flexible printed wiring board 184. Further, power is supplied from a DC power source to the high potential side wiring 181 and the low potential side wiring 182 through the flexible printed wiring board 184. Further, the control unit 202 outputs a control signal to the high potential side wiring 181 and the low potential side wiring 182 through the flexible printed wiring board 184 to switch the heater 180 on and off.

  With this configuration, when the rotary base 172 rotates as shown by the arrow 10 in FIG. 14, the flexible printed wiring board 184 moves and deforms following the rotation, so the high potential side wiring 181 and the low potential side It can suppress that load is applied to the wiring 182 and the signal line 183.

  Referring to FIGS. 15 and 16, collection substrate 170 is electrically connected to one of high potential side wiring 181 and low potential side wiring 182. In the present embodiment, the collection substrate 170 is connected to the low potential side wiring 182 in order to charge the collection substrate 170 to a negative charge. When the negative electrode of the high-voltage DC power supply 141 is connected to the electrostatic needle 140, the collection substrate 170 is connected to the high potential side wiring 181 in order to charge the collection substrate 170 to a positive charge.

  The collection substrate 170 and the heater 180 are bonded by a conductive adhesive 185. When the collection substrate 170 is electrically connected to the low potential side wiring 182 of the heater 180 via the conductive adhesive 185, the collection substrate 170 is charged with a negative charge and between the mixed particles charged with the positive charge. Static electricity is generated.

  However, the collection substrate 170 may be fixed to the ground potential. In this case, the high potential side wiring 181 or the low potential side wiring 182 is fixed to the ground potential, and the collection substrate 170 is connected to the high potential side wiring 181 or the low potential side wiring 182 fixed to the ground potential. Also in this case, the charged mixed particles can be attached to the collection substrate 170 and collected. In this case, an alternating current may be passed through the high potential side wiring 181 and the low potential side wiring 182.

  As the conductive adhesive 185, for example, an epoxy resin adhesive manufactured by adding a noble metal powder to a one-pack type epoxy resin adhesive can be used. In the present embodiment, the collection substrate 170 and the low potential side wiring 182 are electrically connected using the conductive adhesive 185, but may be connected using, for example, solder.

  In the present embodiment, the collection substrate 170 and the low potential side wiring 182 are connected. For example, an electrode connected to the low potential side wiring 182 is provided on the surface of the heater 180, and this electrode The collection substrate 170 may be electrically connected to each other by the conductive adhesive 185.

  As described above, the number of wirings can be reduced by combining the wiring for generating electrostatic force and the wiring for heating the collecting member. As a result, the wiring around the collection substrate 170 can be easily routed, and the occurrence of mixed wiring and disconnection can be suppressed.

  Next, the attachment state of each component of the detection apparatus 100 will be described. FIG. 17 is an exploded perspective view showing an attachment state of each component of the detection device 100. 18 is a view of the detection device 100 of FIG. 17 as viewed from the direction of the arrow XVIII.

  Referring to FIGS. 17 and 18, discharge unit 142, irradiation unit 130, fluorescence detection unit 160, and cleaning unit 153 are attached to lid unit 111. In the present embodiment, the moving part 178 is also attached to the lid part 111. However, the moving part 178 may be attached to the main body part 112. An output shaft 174 a that is an engaging portion that transmits the driving force of the rotary motor 174 protrudes below the rotary motor 174.

  The collection part 177 is attached to the main body part 112. Since the heating unit 188 is attached to the lower surface of the collection substrate 170, it is attached to the main body 112 together with the collection unit 177.

  FIG. 19 is a perspective view showing a state in which the collecting unit 177 and the moving unit 178 are connected. In FIG. 19, for convenience of explanation, the housing 110 is not shown. Referring to FIG. 19, the catching portion 177 and the moving portion 178 are connected by engaging the engagement hole 172 a of the rotation base 172 and the output shaft 174 a of the rotation motor 174. By connecting the collection unit 177 and the moving unit 178, the rotation base 172 rotates (forward rotation, reverse rotation) about the engagement hole 172a as the rotation motor 174 is driven.

  Hereinafter, the arrangement of components of the detection device 100 and the position of the collection substrate 170 in plan view will be described.

  FIG. 20 is a cross-sectional view of the state in which the collection substrate 170 is located at the first position, as viewed from below the collection substrate 170. FIG. 21 is a cross-sectional view of the state where the collection substrate 170 is located at the second position, as viewed from below the collection substrate 170. FIG. 22 is a cross-sectional view of the state in which the collection substrate 170 is located at the third position, as viewed from below the collection substrate 170. FIG. 23 is a cross-sectional view of the state in which the collection substrate 170 is located at the fourth position, as viewed from below the collection substrate 170.

  Referring to FIGS. 20 to 23, in the present embodiment, discharge unit 142, fluorescence detection unit 160, and cleaning unit 153 are arranged side by side in the circumferential direction around shaft 172b of rotation base 172. . Specifically, the fluorescence detection unit 160, the discharge unit 142, and the cleaning unit 153 are arranged in order counterclockwise. The irradiation unit 130 is disposed adjacent to the fluorescence detection unit 160.

  The first position is the position of the collection substrate 170 when the charged particles are adhered to the collection substrate 170 while the mixed particles are charged by the discharge unit 142. The second position is the position of the collection substrate 170 when the fluorescence detection unit 160 detects fluorescence while irradiating the mixed particles attached to the collection substrate 170 with excitation light by the irradiation unit 130. The third position is the position of the collection substrate 170 when the cleaning unit 153 starts removing the mixed particles on the collection substrate 170. The fourth position is the position of the collection substrate 170 when the removal of the mixed particles on the collection substrate 170 by the cleaning unit 153 is completed. A turning range around the shaft portion 172b from the first position to the fourth position is within about 180 °.

  The collection substrate 170 is rotated by driving the rotation motor 174 to move between the first position and the second position. Further, the collection substrate 170 is rotated by driving the rotation motor 174 and moves between the second position and the third position. Further, the collection substrate 170 is rotated by driving the rotation motor 174 to move between the third position and the fourth position.

  As shown in FIGS. 20 to 23, in the main body 112, the proximity sensor 112b and the proximity sensor 112c are arranged on inner walls that are adjacent to each other at right angles. Each of the proximity sensor 112 b and the proximity sensor 112 c has a pair of terminal portions that extend from the inner wall of the main body portion 112 toward the inside of the main body portion 112.

  The collection part 177 is attached to the main body part 112 so that the arm tip part 176a passes between the pair of terminal parts when the shaft part 172b is rotated about the rotation center axis. The proximity sensor 112b and the proximity sensor 112c are electrically connected to the control unit 202. The proximity sensors 112b and 112c input a sensor signal to the control unit 202 when detecting the position of the collection substrate 170 by detecting the proximity of the arm tip 176a.

<Functional configuration>
FIG. 24 is a block diagram showing an example of a functional configuration of control unit 202 for controlling detection apparatus 100 according to the present embodiment. FIG. 24 illustrates an example in which the function of the signal processing unit 30 is realized mainly by hardware that is an electric circuit. However, at least a part of these functions may be realized by the signal processing unit 30 including a CPU (Central Processing Unit) (not shown) and executing a predetermined program by the CPU, that is, by software. In addition, an example in which the measurement unit 40 is realized by software is shown. However, at least some of these functions may be realized by hardware such as an electric circuit.

  Referring to FIG. 24, signal processing unit 30 includes a current-voltage conversion circuit 34 connected to light receiving element 163 and an amplifier circuit 35 connected to current-voltage conversion circuit 34.

  The measurement unit 40 includes a control unit 41, a storage unit 42, a clock generation unit 43, and a drive unit 48.

  The light receiving element 163 inputs a sensor signal, which is a current signal, representing the received fluorescence intensity to the signal processing unit 30. The current signal is input to the current-voltage conversion circuit 34.

  The current-voltage conversion circuit 34 detects a peak current value H representing fluorescence intensity from the current signal input from the light receiving element 163, and converts the peak current value H into a voltage value Eh. The voltage value Eh is amplified to a preset amplification factor by the amplifier circuit 35, and the amplified voltage value Eh is input to the measurement unit 40. The control unit 41 of the measurement unit 40 receives an input of the voltage value Eh from the signal processing unit 30 and sequentially stores the voltage value Eh representing the fluorescence intensity in the storage unit 42.

  The clock generation unit 43 generates a clock signal and outputs it to the control unit 41. The control unit 41 outputs a control signal for controlling ON / OFF of the fan 120 to the drive unit 48 at timing based on the clock signal, and controls ON / OFF of the fan 120. Further, the control unit 41 sends a control signal for controlling ON / OFF of a switch (not shown) arranged between the high-voltage DC power supply 141 and the electrostatic needle 140 to the drive unit 48 at a timing based on the clock signal. To output ON / OFF of the switch, that is, ON / OFF of discharge from the electrostatic needle 140 is controlled. Thereby, the control part 41 controls execution of the collection operation | movement with the detection apparatus 100. FIG.

  Further, the control unit 41 outputs a control signal for controlling ON / OFF of the heater 180 to the drive unit 48 at a timing based on the clock signal, thereby controlling ON / OFF of the heater 180. The control unit 41 is electrically connected to the light emitting element 131 and controls light emission from the light emitting element 131 at a timing based on the clock signal. Thereby, the control unit 41 controls the execution of the detection operation of the collection operation in the detection device 100.

  Further, the control unit 41 outputs a control signal for controlling ON / OFF of the rotary motor 174 to the drive unit 48 at a timing based on the clock signal, thereby controlling ON / OFF of the rotary motor 174. Thereby, the control part 41 controls the position of the collection board | substrate 170 in the detection apparatus 100, and is set as the said 1st position, 2nd position, 3rd position, and 4th position.

  The control unit 41 includes a calculation unit 411, a setting unit 412, and a notification unit 413. The calculation unit 411 is included in the collected particles based on the fluorescence intensity (first fluorescence amount and second fluorescence amount) before and after heating of the particles collected by the collection unit 177 (collection substrate 170). Calculate the amount of biological particles.

  Specifically, the calculation unit 411 uses the voltage value Eh stored in the storage unit 42 to calculate the amount of organism-derived particles in the particles collected on the collection substrate 170. The calculation unit 411 calculates an increase ΔF from the first fluorescence amount measured in the fluorescence measurement step before heating in the second fluorescence amount measured in the fluorescence measurement step after heating. As described above, the increase ΔF is related to the concentration N of biological particles. The calculation unit 411 stores a correlation between the increase amount ΔF illustrated in FIG. 7 and the biological particle concentration N in advance. Then, the calculation unit 411 calculates the amount of biologically derived particles in the particles collected on the collection substrate 170 by substituting the calculated increase amount ΔF into the correlation.

  In the above example, the increase ΔF uses the difference in fluorescence intensity before and after heating for a predetermined heating amount (predetermined heating temperature and heating time), but these ratios may also be used. Good. That is, the calculation unit 411 stores the correlation between the fluorescence intensity ratio and the biological particle concentration N in advance, and substitutes the calculated fluorescence intensity ratio before and after heating into the correlation. The amount of biologically derived particles in the particles collected on the collection substrate 170 may be calculated.

  The setting unit 412 sets a collection time during which particles in the air are collected by the collection unit 177. Here, the case where the collection time is set to time T1 (for example, 20 minutes) is assumed. In this case, the setting unit 412 changes the collection time to a time T2 (for example, 10 minutes) shorter than the time T1 when the amount of the biological particle calculated by the calculation unit 411 is equal to or greater than the threshold Th1. . The collection time corresponds to the collection process time in step S101 of FIG.

  Next, it is assumed that the collection time is set to time T2 (that is, changed from time T1 to time T2). In this case, the setting unit 412 changes the collection time to the time T1 when the biological particle amount calculated by the calculation unit 411 is less than the threshold value Th2, which is smaller than the threshold value Th1. That is, the setting unit 412 returns the collection time from time T2 to T1 when the amount of biological particles decreases. On the other hand, the setting unit 412 changes the collection time to a time T3 (for example, 5 minutes) shorter than the time T2 when the biological particle amount calculated by the calculation unit 411 is equal to or greater than the threshold Th1. That is, the setting unit 412 further shortens the collection time from time T2 to time T3 when the amount of biological particles is still large (threshold value Th1 or more) even if the collection time is shortened.

  Note that the setting unit 412 may not be configured to change the collection time as soon as the amount of particle derived from living organisms is equal to or greater than (or less than) the above threshold. For example, the setting unit 412 may be configured to change the collection time when a period in which the amount of biological particles is equal to or greater than (or less than) the threshold value continues for a predetermined period. Since the amount of biological particles is calculated every certain period as will be described later, it may be a period corresponding to a certain period of n times. Of course, the predetermined period may be simply defined by time (for example, one hour).

  When the collection time is set to the time T2, the notification unit 413 notifies a multiplication value obtained by multiplying the biological particle amount calculated by the calculation unit 411 and the ratio of the time T1 to the time T2. The amount of biological particles is roughly proportional to the collection time. Therefore, although the collection time is shortened from the time T1 to the time T2, the user can grasp the amount of biological particles calculated when the collection time is the time T1.

  As a method of notifying by the notification unit 413, the information may be displayed on a display (not shown) provided in the detection device 100, or may be output from a speaker (not shown) provided in the detection device 100. In addition, when the detection device 100 and the external device are communicably connected via a wired or wireless network, the notification unit 413 outputs the multiplication value to the external device, so that the external device The structure which alert | reports the said multiplication value may be sufficient.

  Any network can be used, but if it is a wired network, for example, a USB (Universal Serial Bus) interface, etc. can be used, and if the network is a wireless network, For example, a wireless local area network (LAN), Bluetooth (registered trademark), an infrared communication system, etc. can be used, and a plurality of communication systems may be combined.

<Detection operation>
A detection operation of detection apparatus 100 according to the first embodiment will be described. 25 and 26 are flowcharts showing a detection operation flow of detection apparatus 100 according to the first embodiment. The detection apparatus 100 continuously detects biological particles by repeating the following steps. In the following description, in FIGS. 20 to 23, clockwise rotation about the shaft portion 172b is referred to as normal rotation direction, and counterclockwise rotation is referred to as reverse direction.

  At the start of the detection operation, the collection substrate 170 is disposed at the first position (FIG. 20) which is the collection position as an initial position. In addition, at the start of the detection operation, the collection time (collection process time in step S101) is set to time T1.

  First, with reference to FIG. 25, the flow of operations from step S101 to step S119 will be described. The control unit 202 controls the fan 120 according to the set collection time to drive it in the forward rotation direction, and turns on a switch (not shown) disposed between the high-voltage DC power supply 141 and the electrostatic needle 140. That is, the control unit 202 drives the fan 120 and turns on the discharge from the electrostatic needle 140 for the set collection time. Thereby, a collection process is performed in detection device 100 (Step S101).

  Specifically, air is introduced into the housing 110 from the introduction port 111a by driving the fan 120 in the forward rotation direction. When the high-voltage DC power supply 141 is connected to the electrostatic needle 140, the electrostatic needle 140 is discharged, and the mixed particles in the surrounding air are charged. In addition, a potential difference is generated between the electrostatic needle 140 and the collection substrate 170, and the charged mixed particles adhere to the surface of the collection substrate 170 and are collected.

  In this embodiment, since the electrostatic needle 140 is used as the discharge electrode, the charged mixed particles are irradiated on the surface of the collection substrate 170 facing the tip of the electrostatic needle 140 and irradiated by the irradiation unit 130. It can be attached to a very narrow area corresponding to the area. Thereby, in the fluorescence measurement process of a post process, the fluorescence emitted from the collected mixed particles can be detected efficiently.

  Next, the control unit 202 drives the rotation motor 174 to rotate the rotation base 172 in the forward rotation direction, and moves the collection substrate 170 to the second position (FIG. 21) that is the fluorescence detection position (step S103). . Then, the control unit 202 calculates the fluorescence intensity using the sensor signal from the light receiving element 163 after turning on the light emitting element 131. Thereby, in the detection apparatus 100, the fluorescence measurement process before a heating is performed (step S105).

  Specifically, when the light emitting element 131 is turned on, excitation light is emitted from the light emitting element 131 toward the mixed particles collected on the collection substrate 170 and collected by the light receiving element 163. Fluorescence emitted from the irradiated mixed particles is received. Thereby, in the detection apparatus 100, the 1st fluorescence amount before a heating of the mixed particle which was made to adhere to the collection board | substrate 170 and was collected is measured.

  Next, the control unit 202 drives the rotary motor 174 to rotate the rotary base 172 in the reverse direction, and moves the collection substrate 170 from the second position to the first position (FIG. 20) (step S107). Then, control unit 202 turns on heater 180 and energizes heater 180 for a predetermined time (for example, 5 minutes), and then turns it off. Thereby, in the detection apparatus 100, a heating process is performed (step S109). Specifically, the heater 180 heats the mixed particles collected by adhering to the collection substrate 170 at a predetermined temperature (for example, 180 ° C.) for 5 minutes, for example. By the heating in the heating process, the fluorescence intensity from the biological particles contained in the mixed particles increases.

  Next, the control unit 202 controls the fan 120 to drive it in the reverse direction. Thereby, a cooling process is performed in the detection apparatus 100 (step S111). That is, by driving the fan 120 in the reverse direction, air is introduced into the housing 110 from the discharge port 112a, and cooling of the collection substrate 170 is promoted. Of course, the fan 120 may not be driven in the cooling process.

  Next, the control unit 202 drives the rotation motor 174 to rotate the rotation base 172 in the forward rotation direction, and moves the collection substrate 170 from the first position (FIG. 20) to the second position (FIG. 21) ( Step S113). Then, the control unit 202 calculates the fluorescence intensity using the sensor signal from the light receiving element 163 after turning on the light emitting element 131. Thereby, in the detection apparatus 100, the fluorescence measurement process after a heating is performed (step S115).

  Specifically, when the light-emitting element 131 is turned on, excitation light is emitted from the light-emitting element 131, and fluorescence emitted from the mixed particles after heating irradiated with the excitation light is received by the light-receiving element 163. . Thereby, in the detection apparatus 100, the 2nd fluorescence amount after a heating of the mixed particle which was made to adhere to the collection board | substrate 170 and was collected is measured.

  Next, the control unit 202 drives the rotation motor 174 to rotate the rotation base 172 in the reverse direction, and moves the collection substrate 170 from the second position (FIG. 21) to the third position (FIG. 22). Further, the control unit 202 rotates the rotation base 172 in the reverse direction to move the collection substrate 170 from the third position (FIG. 22) to the fourth position (FIG. 23). The surface of the collection substrate 170 slides with the tip of the brush 150 while moving from the third position to the fourth position. Thereby, in the detection apparatus 100, a cleaning process is performed (step S117). That is, the mixed particles are removed from the collection substrate 170.

  Preferably, the control unit 202 drives the fan 120 in the normal rotation direction in the cleaning process. Thereby, the mixed particles removed from the collection substrate 170 by the brush 150 are discharged to the outside of the housing 110 from the discharge port 112a. At this time, as the collection substrate 170 approaches the third position from the first position, a range in which the collection substrate 170 and the collection cylinder 190 overlap with each other decreases, and thus the opening area of the collection cylinder 190 increases. Thereby, the mixed particles can be efficiently discharged to the outside of the housing 110. On the other hand, since the opening area of the collection cylinder 190 is reduced by being shielded by the collection substrate 170 during the collection process, it is possible to reduce air introduction loss.

  In the present embodiment, since the cleaning process is performed by moving the collection substrate 170 while the cleaning unit 153 is stationary, it is not necessary to separately provide a moving mechanism for the cleaning unit 153. For this reason, the manufacturing cost can be reduced by reducing the size of the detection device 100.

  Next, the control unit 202 drives the rotation motor 174 to rotate the rotation base 172 in the normal rotation direction, and returns the collection substrate 170 from the fourth position to the first position (FIG. 20) as the collection position ( Step S119).

  Next, with reference to FIG. 26, the flow of processing from step S201 to S229 will be described. It is assumed that the collection time can be set to any one of the standard time T1, the time T2 shortened by one step from the time T1, and the time T3 shortened by two steps from the time T1. The collection time may be set to a time shortened by three or more stages.

  The control unit 202 calculates the amount of biological particles contained in the mixed particles from the difference between the first fluorescence amount and the second fluorescence amount obtained by the operations of Step S105 and Step S115 (Step S201). That is, the control unit 202 stores in advance a correlation between the amount of increase in fluorescence amount due to heating and the concentration of biological particles in FIG. 7, and the difference between the first fluorescence amount and the second fluorescence amount is stored in the correlation. By substituting into the relationship, the concentration of biological particles is calculated. The control unit 202 stores the calculated amount of biological particles (for example, stored in the storage unit 42).

  The control unit 202 notifies the calculated biological particle amount using a display (not shown) (step S203). Specifically, when the collection time is set to time T1, the control unit 202 notifies the calculated value of the amount of biological particles as it is. When the collection time is set to the time T2 by a step to be described later, the control unit 202 notifies a value obtained by multiplying the calculated biological particle amount by T1 / T2. When the collection time is set to the time T3 by a step described later, the control unit 202 notifies the value obtained by multiplying the calculated biological particle amount by T1 / T3. Thereby, even if it is a case where collection time is set to time T2 and T3, the user can grasp | ascertain roughly the amount of particle | grains derived from a living body in case of time T1 which is standard time.

  Next, the control unit 202 determines whether or not the amount of biological particles is not less than the threshold value Th1 continuously (for example, 3 times) (step S205). Specifically, the control unit 202 repeatedly executes each step of FIGS. 25 and 26 continuously. For this reason, the particle amount calculation step (step S201) is executed every predetermined period, and the calculated biological particle amounts are sequentially stored. Therefore, when the calculated values for the past two times are both equal to or greater than the threshold Th1, and the current calculated value is equal to or greater than the threshold Th1, the control unit 202 continuously increases the amount of biological particles three times as the threshold Th1. Judge that it is above.

  Control unit 202 executes the processes of steps S207 to S215 below when the amount of biological particles is equal to or greater than threshold value Th1 continuously n times (YES in step S205).

  The control unit 202 determines whether or not the collection time is set to the time T1 (step S207). When the collection time is set to time T1 (YES in step S207), control unit 202 shortens the collection time from time T1 to time T2 (step S209), and from step S101 in FIG. Repeat the process. In this case, the collection process time in step S101 is time T2.

  If the collection time is not set to time T1 (NO in step S207), control unit 202 determines whether or not the collection time is set to time T2 (step S211). If the collection time is set to time T2 (YES in step S211), control unit 202 further shortens the collection time from time T2 to time T3 (step S213), and step S101 in FIG. Repeat the process from. In this case, the collection process time in step S101 is time T3.

  If the collection time is not set to time T2 (NO in step S211), it is considered that the collection time is set to time T3, and therefore the control unit 202 performs abnormality notification (error notification) ( Step S215). This is because even if the collection time is shortened to time T3, the amount of biological particles is still equal to or greater than the threshold value Th1, which means that the air where the detection device 100 is placed is relatively contaminated. It is believed that there is. Therefore, in order to prevent the life of the detection device 100 (in particular, the life of the collection substrate 170) from being shortened, an abnormality notification is performed.

  The control unit 202 determines whether to stop the operation of the detection apparatus 100 based on a predetermined setting (step S217). Specifically, the control unit 202 sets in advance whether to stop or continue the operation of the detection apparatus 100 at the time of error notification. This setting may be arbitrarily changed by a user or the like.

  When it is determined that the operation of the detection device 100 is not stopped (that is, the setting is made to continue the operation of the detection device 100) (NO in step S217), the control unit 202 performs the processing from step S101 in FIG. repeat. In this case, for example, the control unit 202 continues the operation of the detection device 100 while performing error notification. On the other hand, when the control unit 202 determines that the operation of the detection device 100 is to be stopped (that is, it is set to stop the operation of the detection device 100) (YES in step S217), the operation of the detection device 100 is performed. Stop. In this case, the control unit 202 does not repeat the processing from step S101 in FIG.

  Moreover, the control part 202 performs the process of the following steps S221-S229, when the amount of biological particles is not more than threshold value Th1 continuously n times (in step S205 NO).

  The control unit 202 determines whether or not the collection time is set to the time T1 (step S221). If the collection time is set to time T1 (YES in step S221), control unit 202 repeats the processing from step S101 in FIG. In this case, the collection process time in step S101 is maintained as time T1.

  When the collection time is not set to time T1 (that is, the collection time is set to time T2 or time T3) (NO in step S221), the control unit 202 determines that the amount of biological particles is It is determined whether or not it is less than the threshold value Th2 (<threshold value Th1) continuously n times (step S223). When the amount of biological particles is not less than the threshold value Th2 continuously n times (NO in step S223), the control unit 202 repeats the processing from step S101 in FIG. In this case, since it is considered that dirt in the air has not improved, the collection process time in step S101 is maintained at the current time T2 or time T3.

  When the amount of biological particles is less than threshold value Th2 continuously n times (YES in step S223), control unit 202 determines whether or not the collection time is set to time T2 (step S225). ).

  When the collection time is set to time T2 (YES in step S225), the control unit 202 returns (extends) the collection time from time T2 to time T1 (step S227), and FIG. The processing from step S101 is repeated. In this case, since it is considered that dirt in the air has improved, the collection process time in step S101 is extended from the current time T2 to time T1.

  When the collection time is not set to time T2 (NO in step S225), the control unit 202 returns (extends) the collection time from time T3 to time T2 (step S229), and the process shown in FIG. The processing from step S101 is repeated. In this case, since the contamination in the air is considered to have improved, the collection process time in step S101 is extended from the current time T3 to time T2.

<Effect of conductor>
The operation of conductor 191 in detection device 100 according to the first embodiment will be described. FIG. 27 is a cross-sectional view showing a state in which the collection substrate is arranged at the first position, which is the collection position, in the detection device according to the present embodiment. As shown in FIG. 27, in the collection process, while introducing air in the direction indicated by the arrow 11, a potential difference is generated between the electrostatic needle 140 and the collection substrate 170 to float in the air. The mixed particles are charged.

  If the collecting cylinder 190 is charged to the same polarity as the electrostatic needle 140 due to continuous discharge of the electrostatic needle 140, the potential difference around the tip of the electrostatic needle 140 is reduced. The discharge in the electrostatic needle 140 becomes unstable. As a result, the charge of the mixed particles becomes insufficient and the collection efficiency of the mixed particles decreases.

  Therefore, in the detection device 100 according to the present embodiment, a conductor 191 that is electrically grounded is provided on the inner peripheral surface of the collection tube 190. Thereby, it can suppress that the collection cylinder 190 charges. As a result, it is possible to stabilize the discharge in the electrostatic needle 140 and improve the collection efficiency of the mixed particles.

  As described above, the conductor 191 is located closer to the introduction port 111a than the electrostatic needle 140 in the extending direction of the collection tube 190. That is, the conductor 191 is positioned on the windward side of the electrostatic needle 140 with respect to the air flow introduced into the housing 110 from the introduction port 111a. Thereby, it can suppress that the ion generate | occur | produced by the discharge in the electrostatic needle | hook 140 lose | disappears by contacting with the conductor 191. As a result, the mixed particles can be sufficiently charged to improve the collection efficiency of the mixed particles.

  As described above, the conductor 191 is located on the opposite side to the part of the collection cylinder 190 through which the electrostatic needle 140 penetrates in the radial direction of the collection cylinder 190. Thereby, the distance between the electrostatic needle 140 and the conductor 191 can be secured, and the occurrence of discharge between the electrostatic needle 140 and the conductor 191 and the damage to the conductor 191 can be suppressed.

<Advantages>
According to the first embodiment, when the air is contaminated, the collection time of the particles in the air is shortened, so that the collection substrate is lengthened by reducing the contamination of the collection substrate. be able to. In addition, by shortening the collection time, it is possible to grasp in detail the tendency of changes in the amount of organism-derived particles in an environment that is considered to be relatively contaminated. In addition, when the pollution level in the air is improved, the shortened collection time is restored (extended), so that the collection time according to the amount of living organism-derived particles in the air can be realized. In addition, there is no extra processing load.

[Embodiment 2]
In Embodiment 1, the conductor 191 has a sheet-like shape and has been described with respect to the configuration (see FIGS. 12 and 27) that is attached to the inner peripheral surface of the collection tube 190. Not limited. In the second embodiment, other configuration examples relating mainly to each member around the collection tube will be described. In the following description, differences from detection device 100 according to the first embodiment will be mainly described, and the description of the same configuration as detection device 100 according to the first embodiment will not be repeated. Moreover, although the collection cylinder 190A corresponds to, for example, the collection cylinder 190 in FIG. 12, for the sake of distinction from the first embodiment, a reference numeral “A” is attached for convenience. This also applies to other embodiments (and modifications) described below.

  FIG. 28 is a perspective view for illustrating the inner configuration of collection tube 190A according to the second embodiment. FIG. 29 is a cross-sectional view of the collection tube 190A of FIG. 28 viewed from the XXIX direction. 30 is a cross-sectional view of the collection tube 190A of FIG. 28 as viewed from the XXX direction.

  Referring to FIG. 28, a concave portion 194 is formed in a substantially rectangular shape on the inner peripheral side of collection cylinder 190 </ b> A, and a plate-like conductor 191 is fitted in concave portion 194. Since the recess 194 has a planar shape, the conductor 191 and the wiring 192 can be easily attached to the recess 194. Further, the edge portion 193 in the concave portion 194 is processed into a C surface or an R surface so as to follow the bending of the wiring 192. Therefore, the wiring 192 attached to the recess 194 is difficult to peel off.

  As shown in FIGS. 29 and 30, an introduction member 301 for introducing particles in the air to the introduction port 111a is attached from above the lid portion 111 (collection cylinder 190A). Typically, the introduction member 301 is included in a classifier for classifying particles in the air. The introduction member 301 is made of an electrically insulating material such as an epoxy resin. Thereby, the wiring 192 is disposed so as to be sandwiched between the introduction member 301 and the lid portion 111. Therefore, the conductor 191 can be prevented from being peeled from the recess 194 due to the elastic force of the wiring 192.

  According to the above configuration, the conductor 191 and the wiring 192 can be easily attached to the inner peripheral side of the collection cylinder 190A, and they can be prevented from peeling off from the collection cylinder 190A. Moreover, since the positional relationship between the conductor 191 and the electrostatic needle 140 does not change, the discharge is more stable and the mixed particle collection efficiency can be further improved.

[Embodiment 3]
In the third embodiment, a configuration in which the conductor 191 is fitted into a hole provided in the collection tube 190B will be described.

  FIG. 31 is a diagram for illustrating a configuration of collection cylinder 190B according to the third embodiment. FIG. 32 is a diagram illustrating an engagement example (No. 1) between the hole 90 of the collection tube 190B and the conductor 191 in FIG. FIG. 33 is a diagram illustrating an engagement example (No. 2) between the hole 90 of the collection tube 190B and the conductor 191 in FIG.

  Referring to FIG. 31, collection cylinder 190 </ b> B according to the third embodiment has hole 90 which is an engaged portion engaged with sheet-like conductor 191. Referring to FIG. 32, hole 90 has a shape (in this case, a square shape) with which conductor 191 is engaged. Typically, the positional relationship between the conductor 191 and the electrostatic needle 140 when engaged with the hole 90 is the same as the positional relationship between the conductor 191 and the electrostatic needle 140 in FIG. Further, since the conductor 191 is not provided on the inner peripheral side of the collecting tube as shown in FIG. 12 but is exposed, the wiring 192 can be easily connected to the conductor 191. Therefore, it becomes easy to electrically connect the conductor 191 and the ground electrode 210.

  Note that the adhesiveness between the hole 90 and the conductor 191 may be improved by using a conductive adhesive or an elastic body (such as rubber packing) between the hole 90 and the conductor 191. In this case, it is possible to prevent light, dust, and the like from the outside from entering the collection tube 190B. In addition, the conductor 191 may have another shape (for example, a circular shape) instead of a square shape. In this case, the hole 90 is also configured in a shape (for example, a circular shape) with which the conductor 191 is engaged.

  Referring to FIG. 33, conductor 191 may be formed on substrate 221. Typically, the conductor 191 and the substrate 221 are integrally formed of the same material. The substrate 221 is formed along the outer peripheral surface of the collection tube 190B and is larger than the conductor 191. Therefore, when the conductor 191 and the hole 90 are engaged, it is possible to prevent light, dust, and the like from the outside from entering the collection tube 190B. Further, since the substrate 221 is made of a conductive material, the conductor 191 and the ground electrode 210 can be easily electrically connected by connecting the wiring 192 to the substrate 221.

  FIG. 34 is a diagram for describing a configuration of a collection tube 190C according to the first modification of the third embodiment. Referring to FIG. 34, collection cylinder 190C includes holes 90 to 90c. The conductor 191C includes a main body portion 92 and claw portions 92a to 92c formed integrally with the main body portion 92. The hole 90 of the collection tube 190C and the main body 92 of the conductor 191C are engaged. Further, the three claw portions 92a to 92c of the conductor 191C are engaged with the three holes 90a to 90c of the collection tube 190C, respectively. Thereby, the conductor 191C can be strongly fixed to the collection cylinder 190C.

  FIG. 35 is a diagram for illustrating a configuration of a collection tube 190D according to the second modification of the third embodiment. Referring to FIG. 35, collection cylinder 190 </ b> D has hole 90 and protrusion 197. The protruding portion 197 is formed to protrude from the outer peripheral surface of the collecting cylinder 190D so as to surround the hole 90. By inserting a rectangular conductor (for example, the conductor 191 in FIG. 32) into the protruding portion 197 from the direction of the arrow 12, the conductor can be fixed to the collecting cylinder 190D.

  FIG. 36 is a diagram for illustrating a configuration of a collection tube 190E according to the third modification of the third embodiment. With reference to FIG. 36, the collection tube 190 </ b> E has a hole 90 and an insertion hole 198. The insertion hole 198 is a hole into which a rectangular conductor (for example, the conductor 191 in FIG. 32) is inserted, and is formed in the opening edge 196 of the collection tube 190E. By inserting a conductor into the insertion hole 198 from the direction of the arrow 13, the hole 90 is covered with the conductor. The shape of the conductor is processed according to the shape of the insertion hole 198.

  According to the configurations of the first to third modifications of FIGS. 34 to 36 described above, the conductor 191 is exposed, so that it is easy to electrically connect the conductor 191 and the ground electrode 210 via the wiring 192. It becomes.

  FIG. 37 is a diagram for illustrating a configuration of a collection tube 190F according to the fourth modification of the third embodiment. Referring to FIG. 37, collection cylinder 190F has hole 90 and holes 225a and 225b. Further, the conductor 191 is formed on the substrate 227. Typically, the conductor 191 and the substrate 227 are integrally formed of the same material. The board | substrate 227 is formed in the curved shape so that the outer peripheral surface of the collection cylinder 190E may be followed, and it contains the nail | claw part 223a, 223b (refer Fig.37 (a)). By engaging the claw portions 223a and 223b with the holes 225a and 225b, respectively, the conductor 191 can be firmly fixed to the collecting cylinder 190E (see FIG. 37B). In this case, the conductor 191 and the ground electrode 210 can be easily electrically connected by connecting the wiring 192 to the substrate 227.

  According to the above configuration, the conductor is not attached to the inner peripheral side of the collecting cylinder, but is attached to the collecting cylinder in an exposed state or attached to the outer peripheral surface of the collecting cylinder (the substrate 221 or the substrate 227). ). Therefore, it is easy to connect the wiring 192 to the conductor (or the substrates 221 and 227), and as a result, it is easy to electrically connect the conductor and the ground electrode 210.

[Embodiment 4]
In the fourth embodiment, a configuration in which the collecting cylinder has a double structure of an inner cylinder and an outer cylinder will be described.

  FIG. 38 is a diagram for illustrating a configuration of collection cylinder 190G according to the fourth embodiment. Referring to FIG. 38, the collection cylinder 190G is composed of an inner cylinder 231 and an outer cylinder 241. The inner cylinder 231 has a hole 90 and extends in a cylindrical shape toward the main body 112 so as to be continuous with the introduction port 111a. That is, the inner cylinder 231 has, for example, the same shape as the collecting cylinder 190B in FIG. The inner surface of the outer cylinder 241 is cylindrical, and has a diameter that allows the inner cylinder 231 to be smoothly inserted and rotated freely (rotated in the direction of the arrow 14). The outer cylinder 241 has a hole 95 and is made of a conductive material. The hole 90 and the hole 95 have substantially the same shape.

  As shown in FIG. 38, when the hole 90 and the hole 95 do not overlap, the outer cylinder 241 has a function similar to that of the conductor 191 described above. Specifically, in this case, since the hole 90 is covered with the outer cylinder 241, the outer cylinder 241 that is a conductive material is positioned at a distance from the tip of the electrostatic needle 140. Therefore, the discharge in the electrostatic needle 140 can be stabilized. On the other hand, when the hole 90 and the hole 95 overlap, the electrostatic needle 140 can be visually recognized from the outside. Therefore, it is easy to check the state of the electrostatic needle 140 and clean the electrostatic needle 140. Further, the positional relationship of the conductor (in this case, the outer cylinder 241) with respect to the electrostatic needle 140 can be changed by rotating the inner cylinder 231 and the outer cylinder 241 with each other.

  In addition, although the above demonstrated the structure which rotates the outer cylinder 241 to a horizontal direction (direction of the arrow 14), it is not restricted to this structure. For example, the outer cylinder 241 may be shifted in the vertical direction so that the hole 90 and the hole 95 overlap. In the above description, since the outer cylinder 241 is used as a conductor, the example in which the outer cylinder 241 is made of a conductive material has been described. However, the present invention is not limited to this. For example, when the detection device 100 is used continuously for a long time, the temperature of the housing 110 increases. Therefore, in order to reduce this temperature rise, the outer cylinder may be made of a material with good heat dissipation.

[Embodiment 5]
As described in the second embodiment, the introduction member 301 for introducing particles in the air to the introduction port 111a is attached to the lid 111 from above. In the fifth embodiment, a configuration in which the conductor 303 is formed on the introduction member 301 will be described.

  FIG. 39 is a diagram for describing the configuration of collection tube 190H and introduction member 301 according to the fifth embodiment. Referring to FIG. 39, collection cylinder 190H according to the fifth embodiment includes a conductor 191 provided on the inner peripheral surface of collection cylinder 190H and positioned at a distance from the tip of electrostatic needle 140. A conductor 303 is formed on the outer surface of the introduction member 301. By engaging (inserting) the introduction member 301 into the introduction port 111a, the conductor 191 of the collection tube 190H and the conductor 303 of the introduction member 301 come into contact with each other. Therefore, by connecting the wiring 192 connected to the ground electrode 210 to the conductor 303, the conductor 191 can be easily brought to the ground level. That is, it becomes easy to electrically connect the conductor 191 and the ground electrode 210. Further, since the wiring 192 is not directly connected to the conductor 191, the conductor 191 can be prevented from being peeled off due to stress applied to the wiring 192.

  FIG. 40 is a perspective view of introduction member 301 according to the fifth embodiment. Referring to FIG. 40, the conductor 303 is formed over the entire outer peripheral surface of the introduction member 301. Thus, when the introduction member 301 is inserted into the introduction port 111a, the conductor 303 and the conductor 191 are necessarily in contact with each other. That is, no matter how the introduction member 301 is rotated in the direction of the arrow 15, the conductor 191 and the conductor 303 are in contact with each other, so that the orientation in the direction of the arrow 15 when inserting the introduction member 301 into the introduction port 111 a is conscious. There is no need to do. Therefore, when the introduction member 301 is a classifier, the degree of freedom in design regarding the direction of the particle suction port (not shown) in the classifier is improved.

  The conductor 303 is not limited to being formed over the entire outer surface of the introduction member 301. For example, when the introduction member 301 is inserted into the introduction port 111a, it may be formed on a part of the outer surface of the introduction member 301 so that the conductor 191 and the conductor 303 of the collection tube 190H are in contact with each other. .

[Embodiment 6]
In the sixth embodiment, a configuration in which a joining member is provided between the introduction port 111a and the introduction member 301 will be described.

  FIG. 41 is a diagram for illustrating the configuration of collection cylinder 190I, introduction member 301, and joining member 321 according to the sixth embodiment. 42 is a view of the joining member 321 in FIG. 41 as viewed from the arrow XLII. FIG. 43 is a view of the joining member 321 in FIG. 41 as viewed from the arrow XLIII.

  41 to 43, the collection tube 190 and the introduction member 301 are attached (joined) via a joining member 321. The joining member 321 is made of a conductive member, and is typically a metal member such as copper. The electrode part 321 a which is a part of the bonding member 321 functions as an electrode facing the electrostatic needle 140. Specifically, when the collection tube 190I and the introduction member 301 are attached via the joining member 321, the electrode portion 321a of the joining member 321 is positioned with a gap from the tip portion of the electrostatic needle 140. It will be. Therefore, the discharge in the electrostatic needle 140 can be stabilized. That is, the joining member 321 serves both as the joining of the collection tube 190 and the introduction member 301 and the electrode facing the electrostatic needle 140.

  According to such a configuration, it is not necessary to form the conductor 191 in the collection tube 190, and the structure can be simplified. Moreover, since the joining member 321 is a metal member and is robust, the position of the counter electrode (electrode part 321a) is stabilized. Further, by connecting the wiring 192 to the exposed portion (for example, the portion 321b in FIG. 41) on the outer periphery of the bonding member 321, it becomes easy to electrically connect the ground electrode 210 and the electrode portion 321a. That is, the electrode part 321a can be easily brought to the ground level.

[Other embodiments]
The detection device 100 according to the present embodiment may be used as a single device for detecting biological particles, or may be an air cleaner, an air conditioner, a humidifier, a dehumidifier, a vacuum cleaner, a refrigerator, a television, or the like. It may be incorporated into household appliances.

[Summary]
This embodiment can be summarized as follows.

  (1) A detection device 100 for detecting biological particles, a collection unit 177 for collecting particles in the air, and first fluorescence before and after heating of the particles collected by the collection unit 177 Based on the amount and the second fluorescence amount, the calculation unit 411 that calculates the amount of biological particles contained in the collected particles, and the collection time during which particles in the air are collected by the collection unit 177 And a setting unit 412 for setting. When the collection time is set to the time T1, and the amount of the biological particle calculated by the calculation unit 411 is equal to or greater than the threshold Th1, the setting unit 412 is shorter than the time T1. Change the collection time to T2.

  According to the above configuration, even when the detection apparatus 100 is used in a place where air is contaminated, it is possible to extend the life of the collection unit 177 used for collecting particles.

  (2) When the collection time is set at time T2, and when the amount of the biological particle calculated by the calculation unit 411 is less than the threshold value Th2, which is smaller than the threshold value Th1, the setting unit 412 Changes the collection time to time T1.

  According to the above configuration, when the air pollution level is improved, the collection time can be returned to the original state, whereby an appropriate collection time can be realized according to the air pollution level.

  (3) When the collection time is set at time T2, the notification unit 413 that notifies the value obtained by multiplying the amount of the biological particle calculated by the calculation unit 411 and the ratio of the time T1 to the time T2 is further provided. Prepare.

  According to the said structure, since the user can always grasp | ascertain the amount of biological particles derived from the collection time T1, the air can be intuitively grasped.

  (4) When the collection time is set to the time T2, and the amount of the biological particle calculated by the calculation unit 411 is equal to or greater than the threshold Th1, the setting unit 412 Is changed to time T3 shorter than time T2.

  According to the above configuration, even when the collection time is shortened, if the amount of particles to be collected is still large, the collection time is further shortened, so that the life of the collection unit 177 can be extended. It becomes possible.

  (5) When the collection time is set to the time T1, and the period in which the amount of biological particles calculated by the calculation unit 411 is equal to or greater than the threshold Th1 continues for a predetermined period The setting unit 412 changes the collection time to time T2.

  According to the above configuration, since the influence when the amount of particles collected due to noise or the like temporarily increases can be eliminated, the reliability of the detection apparatus 100 can be improved.

  The configuration illustrated as the above-described embodiment is an example of the configuration of the present invention, and can be combined with another known technique, and a part of the configuration is omitted without departing from the gist of the present invention. It is also possible to change the configuration.

  In the above-described embodiment, the processing and configuration described in the other embodiments and the processing and configuration described in the modification may be appropriately adopted and implemented.

  It should be thought that embodiment disclosed this time is an illustration and restrictive at no points. The scope of the present invention is defined by the terms of the claims, rather than the description above, and is intended to include any modifications within the scope and meaning equivalent to the terms of the claims.

  30 signal processing unit, 34 voltage conversion circuit, 35, 162 amplification circuit, 40 measurement unit, 41, 202 control unit, 42 storage unit, 43 clock generation unit, 48 drive unit, 90, 90a to 90c, 95, 225a, 225b Hole, 92, 112 body part, 92a to 92c, 223a, 223b claw part, 100 detector, 110 housing, 111 lid part, 111a inlet, 112a outlet, 112b, 112c proximity sensor, 120, 500 fan, 130 Irradiation unit, 131, 550 Light emitting element, 132 element frame, 133 lens frame, 134 condenser lens, 135, 166 lens holder, 140, 530 electrostatic needle, 141 high voltage DC power supply, 142 discharge part, 150 brush, 151 brush holder , 152 Brush fixing part, 153 Cleaning part, 160 Firefly Photodetector, 161 Noise shield, 163,565 Light receiving element, 164 Light receiving frame, 165 Fresnel lens, 170, 510 Collection substrate, 171 Substrate holder, 172 Rotating base, 172a Engagement hole, 172b Shaft, 173 Motor presser, 174 Rotation motor, 174a Output shaft, 175 Motor holder, 176 Arm part, 176a Arm tip, 177 Collection part, 178 Moving part, 180, 520 Heater, 181 High potential side wiring, 182 Low potential side wiring, 183 Signal line , 184 flexible printed circuit board, 185 conductive adhesive, 188 heating unit, 190, 190A to 190I collection cylinder, 191, 191C, 303 conductor, 192 wiring, 193 edge, 194 recess, 196 opening edge, 197 Protrusion, 198 insertion hole, 200 Rigid board, 210 Ground electrode, 221, 227 Substrate, 231 Inner cylinder, 241 Outer cylinder, 301 Introduction member, 321 Joining member, 321a Electrode part, 411 calculation part, 412 setting part, 413 notification part, 540 DC power supply, 560 Lens, 600 mixed particles, 600A particles, 600B dust.

Claims (5)

A detection device for detecting biological particles,
A collection unit for collecting particles in the air;
Based on the fluorescence intensity before and after heating of the particles collected by the collection unit, a calculation unit for calculating the amount of biological particles contained in the collected particles;
A setting unit for setting a collection time during which particles in the air are collected by the collection unit;
When the collection time is set to the first time, and the amount of the organism-derived particles calculated by the calculation unit is equal to or greater than a first threshold, the setting unit is A detection device that changes the collection time to a second time shorter than the first time.   The collection time is set to the second time, and the amount of the organism-derived particles calculated by the calculation unit is less than a second threshold smaller than the first threshold. The detection device according to claim 1, wherein the setting unit changes the collection time to the first time.   When the collection time is set to the second time, a value obtained by multiplying the amount of the biological particle calculated by the calculation unit and the ratio of the first time to the second time. The detection device according to claim 1, further comprising a notification unit that notifies   When the collection time is set to the second time, and the amount of the organism-derived particles calculated by the calculation unit is equal to or greater than the first threshold, the setting unit The detection device according to claim 1, wherein the collection time is changed to a third time shorter than the second time.   The period when the collection time is set to the first time and the amount of the particle derived from the organism calculated by the calculation unit is equal to or greater than the first threshold is predetermined. The detection device according to claim 1, wherein the setting unit changes the collection time to the second time when the period continues.

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