WO2019127851A1

WO2019127851A1 - Conveying assembly, and particulate matter concentration detection device and method

Info

Publication number: WO2019127851A1
Application number: PCT/CN2018/075534
Authority: WO
Inventors: 刘小东; 付献; 江红; 魏栋彬; 张丹丹
Original assignee: 深圳市华唯计量技术开发有限公司
Priority date: 2017-12-29
Filing date: 2018-02-07
Publication date: 2019-07-04
Also published as: CN108190576A

Abstract

A conveying assembly for conveying a filter membrane (13) back and forth, comprising a first paper tape spindle (167) for winding and unwinding the filter membrane (13), a first driving mechanism (162) for driving the first paper tape spindle (167) to rotate forwardly and reversely, a second paper tape spindle (168) for winding and unwinding the filter membrane (13), a second driving mechanism (161) for driving the second paper tape spindle (168) to rotate forwardly and reversely, a counting wheel (1613) and a tape rewinding wheel set provided on a filter membrane conveying path between the first paper tape spindle (167) and the second paper tape spindle (168) and used for supporting the filter membrane (13), a detection device (160) correspondingly provided at the counting wheel (1613) and used for detecting the number of rotations of the counting wheel (1613), and a control device. The control device controls the operation of the first driving mechanism (162) and the second driving mechanism (161) according to a detection signal of the detection device (160). When the filter membrane (13) is wound on the first paper tape spindle (167) and the second driving mechanism (161) drives the second paper tape spindle (168) to rotate forwardly, the filter membrane (13) moves toward the second paper tape spindle (168); if the detection device (160) detects that the counting wheel (1613) rotates preset turns, the second driving mechanism (161) stops working. Also provided are a particulate matter concentration detection device having the conveying assembly, and a corresponding particulate matter concentration detection method. The detection device (160) in the conveying assembly detects the number of rotations of the counting wheel (1613) provided on the filter membrane conveying path to determine the moving distance of the filter membrane, so that it is ensured that blank detection, and air particulate matter collection and detection are all performed at the same position of the filter membrane, and thus the accuracy of particulate matter concentration tests is improved.

Description

\¥0 2019/127851 卩(:17(:\2018/075534

Instruction manual

Title of Invention: A Transmission Component and Particle Concentration Measurement Device and Measurement Method

[0001] The present application is based on a Chinese patent application filed on Jan. 29, 2017, the entire disclosure of which is hereby incorporated by reference.

Technical Field

The present invention relates to the field of air detection technology, and more particularly to a transmission assembly and a particulate concentration detecting device and a detecting method.

BACKGROUND OF THE INVENTION

[0005] With the increase of air pollution prevention and control in China, it is particularly important to grasp the degree of environmental pollution in various places. If the air pollution index is too high, it will cause serious harm, because the pollution of tiny particles in the air is an important factor in detecting the air pollution index. Therefore, the detection of environmental particulate matter concentration is very urgent. At present, many companies at home and abroad use (3-ray method to detect the concentration of particulate matter in the air. (The 3-ray absorption method is based on the principle that when 3 rays pass through a certain substance, (3 particles collide with electrons in the particles to cause energy loss). Forming the absorption phenomenon. When the airborne matter concentration is detected on-line, the air sample is collected by the filter membrane, and the blank filter membrane and the filter membrane after the sample collection are separately tested (the degree of passage of the 3 ray particles is calculated to calculate the air particulate matter concentration. If the blank is not tested at the same position of the filter and the sample is collected, there is a high requirement for the uniformity of the filter, but there is no such a high uniformity filter, so when the blank and the collected sample are in the same position of the filter The test data is the most accurate, but it is difficult to achieve the filter film after the blank sample and the sample collection at the same position of the filter without moving the sample, detector or collection device by the influence of the 3 ray characteristics and the collection of the sample. Test.

In view of the above, it is necessary to provide a transfer assembly and a particulate concentration detecting device and a detecting method capable of transporting a precise round-trip movement of a filter to improve the accuracy of particle concentration measurement to solve the above drawbacks.

SUMMARY OF THE INVENTION

[0008] The technical problem to be solved by the present invention is to provide a transfer assembly that can transport precise movement of a filter membrane to improve the accuracy of particle concentration measurement.

Another technical problem to be solved by the present invention is to provide a particle concentration detecting device capable of transporting a precise round-trip movement of a filter to improve the accuracy of particle concentration measurement. \¥0 2019/127851 卩(:1' 2018/075534

Another technical problem to be solved by the present invention is to provide a particle concentration detecting method capable of transporting a filter to accurately reciprocate motion to improve the accuracy of particle concentration testing.

[0011] In order to solve the above technical problem, according to an aspect of the present invention, a transport assembly for transporting a filter reciprocation is provided, the transport assembly including a first paper web mandrel for winding a filter membrane, a first driving mechanism for driving the first paper belt mandrel to rotate in the forward and reverse directions, a second paper tape mandrel for winding the filter film, and one for driving the second paper tape mandrel a second driving mechanism rotated in the opposite direction, a counting wheel and a rewinding wheel set for supporting the filter disposed on the filter conveying path between the first tape mandrel and the second tape mandrel, Corresponding to a detecting device for detecting the number of revolutions of the counting wheel and a control device, wherein the control device is respectively connected to the detecting device, the first driving mechanism and the second driving mechanism, according to the The detection signal of the detecting device controls the operation of the first driving mechanism and the second driving mechanism, when the filter film is wound on the first paper tape mandrel and the second driving mechanism drives the second paper tape mandrel to rotate forward, Filter through the counting wheel and rewinding wheel set Moving in the direction of the second tape mandrel, when the detecting device detects that the counter wheel is rotated by the preset number of turns, the second drive mechanism stops working.

[0012] A further technical solution is: the second driving mechanism is identical in structure to the first driving mechanism, the first driving mechanism includes a motor, a gear meshing with the motor, a clutch, and a damper, and the damper is sleeved on the a drive shaft in the clutch, the clutch is coupled to the motor through the gear, and the first paper web mandrel is coupled to the drive shaft; the rewind wheel set includes a first rewind wheel, a second rewinding wheel and a third rewinding wheel, when the filter film is wound on the first tape reel and the motor of the second driving mechanism is operated, the second paper tape mandrel driven by the second driving mechanism acts as an active a gear, the first paper tape mandrel is used as a driven gear, and the filter is sequentially transmitted through the first rewinding wheel, the counter wheel, the second rewinding wheel and the third rewinding wheel, to the second The direction of the tape mandrel moves.

[0013] A further technical solution is: the first driving mechanism further includes a paper tape gland, and the paper tape gland is fixedly mounted on the first paper tape mandrel.

[0014] In order to solve the above technical problem, according to another aspect of the present invention, a particulate matter concentration detecting device is provided, the particulate matter concentration detecting device comprising: a casing, a sample collecting device disposed on the casing, and a a filter membrane, a first chamber, a concentration detecting assembly and a transfer assembly in the housing, wherein the sample collecting device is in communication with air, the first chamber is in communication with the sample collecting device, and a first end is provided on the lower end surface thereof a through hole, the filter is laid on the lower end surface of the first chamber, and the concentration detecting component is \¥0 2019/127851 卩 (: 1' 2018/075534 said first chamber adjacent, which comprises respectively disposed on both sides of the filter (3 ray source and (3 scintillation detector, the transfer) The component is the above-mentioned transfer component, and the first drive mechanism and the second drive mechanism in the transfer component are respectively disposed at the two ends of the first chamber and the concentration detecting component for driving the filter in the first chamber and The concentration detection component translates between components.

[0015] A further technical solution is: the particulate matter concentration detecting device further includes a sealing assembly, the sealing assembly is located below the first chamber, the sealing assembly includes a second chamber, and the first portion is provided therein a driving mechanism for driving the sealing assembly to move up and down, the third driving mechanism is controlled by the control device, and the upper end surface of the second chamber is provided with a second through hole, when the sealing assembly is at the third driving mechanism When the driving is moved upward until the filter is clamped between the lower end surface of the first chamber, the filter seals the first through hole and the second through hole, and the air entering the first chamber is worn. The membrane is filtered and enters the second chamber, and particulate matter in the air is captured by the membrane.

[0016] A further technical solution is: the second through hole penetrates the second chamber, the sample collection device includes an intake pipe, an air outlet pipe, and an air suction pump, the air intake pipe and the air and the first A chamber is connected, the air outlet tube is connected to the second through hole of the second chamber, and the air suction pump is connected to the air outlet tube.

[0017] A further technical solution is: the particulate matter concentration detecting device further includes an X fluorescence detecting component, the fluorescent detecting component is adjacent to the concentration detecting component, and is located at an upper end of the filter to detect an element type in the air. And content.

[0018] In order to solve the above technical problem, according to another aspect of the present invention, a particle concentration detecting method is provided, the method comprising:

[0019] The control device drives the transport component to drive the filter to rotate forward to transfer the blank filter to the concentration detecting component

[0020] In the concentration detection component (3 ray source emission (3 ray, in the concentration detection component (3 scintillation detector detection (3 ray source passes through the blank filter (3 ray intensity! 11 and recorded ;

[0021] the control device drives the transport assembly to drive the filter to reverse, to transfer the filter film (the 3 hole radiation source penetrates below the first through hole of the first chamber;

[0022] opening the sample collection device, starting sampling, air entering from the sample collection device, sequentially passing through the first chamber and the filter membrane, and the filter membrane captures particulate matter in the air;

[0023] After the sampling is finished, the control device drives the conveying component to drive the filter to rotate forward to capture the particle at the particle. \¥0 2019/127851 卩(:1' 2018/075534 is sent to the concentration detection component;

(3 ray source emission (3 ray, (3 scintillation detector detection (3 ray source passes through the membrane that captures the particulate matter (3 ray intensity and recorded;

[0025] According to the (3 ray intensity! 11 and (3 ray intensity detected), the particle concentration of the air is calculated.

[0026] A further technical solution is: the control device drives the transport component to drive the filter reverse, to further include the filter film (after the third-channel radioactive source penetrates below the first through hole of the first chamber) : The third drive mechanism drives the seal assembly to move upward to clamp the filter between its upper end surface and the lower end surface of the first chamber.

[0027] A further technical solution is: according to the (3 scintillation detector detected (3 ray intensity! 11 and (3 ray intensity calculated air particle concentration further comprises: the control device drives the transport component to drive the filter Forward rotation to transfer the particles trapped under the filter to the X-ray detection module to detect the type and content of the elements in the air.

[0028] Compared with the prior art, the present invention can drive the filter to move back and forth by the transport assembly, and if the filter is wound on the first tape mandrel before the sample is collected, the second drive in the transfer assembly The mechanism drives the second paper strip mandrel to rotate forward to drive the filter to rotate forward, that is, the filter moves through the counting wheel and the rewinding wheel set to the second paper strip mandrel, and the detecting device detects the counting wheel rotating circle When the number is the preset number of turns, the control device controls the second drive to stop working to detect the blank filter (the 3-ray pass rate; after the detection is completed, the control device drives the first drive mechanism to drive the filter reverse, when When the detecting device detects that the number of revolutions of the counting wheel is a preset number of turns, the first driving mechanism stops working, and after the blank detection, the filter is transmitted (the 3-ray source penetrates to the sample collecting place to allow the filter to capture the air sample) In the particulate matter, after the sampling is finished, the control circuit drives the second driving mechanism to drive the filter to rotate forward to detect the collection of the sample (the pass rate of the 3 rays, according to the two tests (the pass rate of the 3 rays can be calculated) According to the particle concentration of the air, the present invention detects the moving distance of the filter by detecting the number of revolutions of the counting wheel disposed on the filter conveying path by the detecting device in the conveying unit, so as to transport the filter accurately and reciprocally to filter After testing the blank at the same position of the membrane and collecting the sample (3 ray pass rate, it ensures that the blank detection, air particulate collection and detection are all in the same position of the filter, thus improving the accuracy of the particle concentration test.

BRIEF DESCRIPTION OF THE DRAWINGS

1 is a schematic structural view of a first embodiment of a particle concentration detecting device of the present application. \¥0 2019/127851 卩(:1' 2018/075534

2 is a cross-sectional view in the eight direction of the particulate matter concentration detecting device shown in FIG. 1.

3 is a schematic structural view of a clutch in the present application.

4 is a cross-sectional view of the clutch of FIG. 3 in an 8-:8 direction.

5 is a schematic structural view of a second embodiment of the particulate matter concentration detecting device of the present application.

6 is a schematic flow chart of a specific embodiment of a method for detecting a concentration of particles in the present application.

DETAILED DESCRIPTION

[0037] In order to make the objects, technical solutions and advantages of the present invention more clearly understood by those skilled in the art, the present application will be further described below in conjunction with the accompanying drawings and embodiments.

Referring to FIGS. 1 through 4, FIGS. 1 through 4 illustrate a specific embodiment of the particulate matter concentration detecting device 10 of the present application. In the embodiment shown in the drawings, the particulate matter concentration detecting device 10 includes a casing 11, a sample collecting device disposed on the casing 11, and a filter 13 and a first cavity disposed in the casing 11. a chamber 14, a concentration detecting assembly 15, a transport assembly, and a seal assembly 17, the transport assembly including control means, wherein the sample collection device is in communication with air, the first chamber 14 is in communication with the sample collection device, and The lower end surface is provided with a first through hole, and the sealing assembly 17 is located below the first chamber 14. The sealing assembly 17 includes a second chamber 171, and a third driving mechanism is disposed therein to drive The sealing assembly 17 is moved up and down, and the third driving mechanism is controlled by the control device. Preferably, the second chamber 171 is provided with a second through hole penetrating the second chamber 171, and the filter film 13 is tiled. Between the lower end surface of the first chamber 14 and the upper end surface of the seal assembly 17, the concentration detecting assembly 15 is adjacent to the first chamber 14, and includes the diaphragms 13 respectively disposed on both sides of the filter film 13 (3 shots) a radiation source 151 and (3 scintillation detector 152, the transfer assembly for driving the filter 13 to translate between the first chamber 14 and the concentration detecting assembly 15. When the sealing assembly 17 is in the third drive When the mechanism is driven upwards until the filter 13 is clamped between the lower end surface of the first chamber 14, the filter 13 seals the first through hole and the second through hole at the same time. The air of one chamber 14 passes through the filter membrane 13 and enters the second chamber 171, and the particulate matter in the air is captured by the filter membrane 13.

[0039] In some embodiments, the sample collection device includes an intake pipe 121, an air outlet pipe 122, and a getter pump, the intake pipe 121 is in communication with the air and the first chamber 14, the air outlet pipe 122 is connected to the second through hole of the lower end surface of the second chamber 171, and the getter pump is connected to the air outlet tube 122. It can be seen that when the air sample is collected, the air suction pump is turned on, the air suction pump is pumped, and the air enters from the air inlet pipe 121, and sequentially passes through the first \¥0 2019/127851 卩 (: 1' 2018/075534 A chamber 14, a filter 13 and a second chamber 171 are finally discharged through the outlet pipe 122.

[0040] In some embodiments, the transport assembly includes a first tape mandrel 16 7 for winding the filter 13 and a drive for driving the first tape mandrel 167 in the forward and reverse directions. a rotating first driving mechanism 162, a second paper tape mandrel 168 for winding the filter film, a second driving mechanism 161 for driving the second paper tape mandrel 168 to rotate in the forward and reverse directions, and a a counting wheel 1613 and a rewinding wheel set for supporting the filter 13 disposed on the transmission path of the filter film 13 between the first paper tape mandrel 167 and the second paper tape mandrel 168, one correspondingly disposed in the The detecting wheel 160 is configured to detect the number of rotations of the counting wheel 1613 and a control device, and the control device is respectively connected to the detecting device 160, the first driving mechanism 162 and the second driving mechanism 1 61. Controlling the operation of the first driving mechanism 162 and the second driving mechanism 161 according to the detection signal of the detecting device 160, when the filter film 13 is wound on the first tape spool 167 and the second driving mechanism 161 drives the second When the tape mandrel 168 is rotating forward, the filter 13 passes through the counting wheel 1613 and the rewinding wheel set to the second tape. The direction of movement of the shaft 168, when the detecting means 160 detects the predetermined number of revolution of 1613 count wheel, a second drive mechanism 161 is stopped. In this embodiment, the preset number of turns is one turn, that is, the distance that the filter film 13 moves when the counting wheel 1613 rotates one time is the sample collection position to (the distance of the 3-ray detecting position; preferably, the detecting device 160 selects a photoelectric sensor, and the control device is implemented based on a single chip microcomputer. In some other embodiments, the control device may also be based on an ARM,

And other control chip implementation. Understandably, in some other embodiments, the predetermined number of turns may be set according to the sample collection position to (the distance of the 3-ray detection position and the diameter of the count wheel).

[0041] In this embodiment, the second driving mechanism 161 and the first driving mechanism 162 are respectively disposed at the two ends of the first chamber 14 and the concentration detecting component 15 in the housing 11, and the first driving mechanism 162 includes There is a motor 163, a gear 164, a clutch 165, a damper 166, and a paper tape gland 169. The motor 163 is mounted on a motor bracket 18, and the motor bracket 18 is mounted on the housing 11, the damper 166 sleeve Disposed on a transmission shaft 1653 in the clutch 165, the gear 164 is meshed with a gear on the motor 163, and the clutch 165 is coupled to the motor 163 via the gear 164, and the motor 163 is controlled by The control device, the first paper tape mandrel 168 is coupled to the drive shaft 1653 of the clutch 165, and the paper tape gland 169 is fixedly mounted on the paper tape mandrel 168 to fix the filter film 13 therein. The first paper tape mandrel 168 is described. The second driving mechanism 161 is identical in structure to the first driving mechanism 162, and the frictional force of the damper 166 tensions the filter film 13 between the second driving mechanism 161 and the first driving mechanism 162; The group includes the first rewinding wheel 1 \¥0 2019/127851 卩(:1' 2018/075534

610, the second rewinding wheel 1611 and the third rewinding wheel 1612. In this embodiment, when the filter film 13 is wound on the first tape reel 167 and the motor 163 of the second driving mechanism 161 is working, the filter 13 is rotated forward by the second paper tape mandrel 16 8 , and the counting wheel 1613 and the rewinding wheel set rotate forward under the friction of the paper tape. At this time, the clutch 165 of the second driving mechanism 161 is energized, and the transmission shaft 1653 In conjunction with the gear 164, the motor 163 is rotated simultaneously, and the clutch 165 of the first drive mechanism 162 is not energized, and the drive shaft 1653 and the gear 164 are each freely rotatable, and the second drive belt core 168 driven by the second drive mechanism 161. As the driving gear, the first paper belt mandrel 167 driven by the first driving mechanism 162 serves as a driven gear, and the filter film 13 sequentially passes through the first rewinding wheel 1610 adjacent to the first driving mechanism 162 and The counting wheel 1613, and the second rewinding wheel 1611 and the third rewinding wheel 1612 adjacent to the second driving mechanism 161 are conveyed to move in the direction of the second tape mandrel 168, when the detecting device 160 detects Counting wheel 1613 rotates When the ring, i.e., a blank pass filter 13 to the detection assembly at a concentration of 15, second drive mechanism 161 is stopped. When the first driving mechanism 162 is in operation, the first paper tape mandrel 167 is used as a driving gear, and the second paper tape mandrel 168 is used as a driven gear, and the first paper tape mandrel 167 drives the filter film 13 to reverse When the detecting device 160 detects that the counting wheel 1613 rotates one turn, that is, the filter film 13 is transmitted (the third light source 151 penetrates below the first through hole, the first driving mechanism 162 stops working, at this time The filter 13 captures particulate matter in the air sample. Based on the above design, the damper 166 dampens the drive shaft 1653, and since the filter 13 is a soft material, the two sides are supported by the transfer wheel, and the middle portion cannot be tested because of the need. The support, and the friction of the damper wheel can make the tape completely tight.

3 and 4, FIG. 3 and FIG. 4 show a specific structure of the clutch 165 in the present application. As can be seen from the drawings, the clutch 165 includes: a coil fixing box 1651, an electromagnetic coil 1652, a transmission shaft 1653, a transmission shaft seat 1654, an electromagnetic attraction piece 1655, a gear conversion member 1656, a positioning cover 1657, a snap ring 1658, and a gear. The shaft 1659, the electromagnetic coil 1652 and the transmission shaft seat 1654 are sequentially mounted on the coil fixing box 1651, that is, the electromagnetic coil 1652 is enclosed between the coil fixing box 1651 and the transmission shaft seat 1654, and the transmission shaft 1653 is installed. On the transmission shaft seat 1654, the gear conversion member 1656 is mounted on the coil fixing box 1651, the electromagnetic attraction piece 1655 is mounted on the gear conversion member 1656, and the gear shaft 1659 is converted with the gear The member 1656 is connected to mount the gear 164, and the snap ring 1658 and the positioning cover 1657 are sequentially sleeved on the transmission shaft 1653. The coil fixing box 1651 in the present application is a fixing member of the entire clutch 165, and all other components are Install for the baseline. When the electromagnetic coil 1652 is energized, the magnet attracts the sheet 1 \¥0 2019/127851 卩(:1' 2018/075534

655 is magnetized, and is coupled with the transmission shaft seat 1654. The transmission shaft 1653 and the gear shaft 1659 are simultaneously rotated, that is, rotated by the gear 164 under the driving of the motor 163; and when the electromagnetic coil 1652 is not energized, the transmission shaft 1653 is The gear shafts 1659 are each free to rotate.

[0043] The working process of the particulate matter concentration detecting device 10 in this embodiment is as follows:

[0044] When it is required to detect the particulate matter concentration of the air and the filter film 13 is wound on the first tape spool 167, the control device transmits a control command to the motor 163 of the second drive mechanism 161 to drive the second drive mechanism 161. The motor 163 operates, and the filter film 13 rotates forward under the driving of the second paper tape mandrel 168. The counting wheel 1613 and the rewinding wheel set rotate forward under the friction of the paper tape. At this time, the clutch of the second driving mechanism 161 165 is energized, the transmission shaft 1 653 is combined with the gear 164 to rotate simultaneously under the driving of the motor 163, and the clutch 1 65 in the first driving mechanism 162 is not energized, and the transmission shaft 1653 and the gear 164 are respectively freely rotated, and the second paper belt mandrel 168 as the driving gear, the first paper tape mandrel 167 as a driven gear, the filter film 13 sequentially passes through the first rewinding wheel 16 10 , the counting wheel 1613 , the second rewinding wheel 1611 and the third rewinding belt The wheel 1612 transmits, when the detecting device 160 detects that the counting wheel 1613 rotates one turn, that is, when the blank filter 13 is delivered to the concentration detecting component 15, the detecting device 160 sends a signal to the control device to stop the second driving mechanism 161 from operating. Open the division On both sides of the filter membrane 13 (3 ray source 151 and (3 scintillation detector 152, and recorded (3 scintillation detector 152 detected (3 ray source 151 passes through the blank filter 13 (3 ray intensity! 11. After the recording is completed, a signal is sent to the control device, and the control device drives the motor 163 of the first driving mechanism 162 to operate. The filter film 13 is reversed by the first paper tape mandrel 167, and the first paper is The core shaft 167 is used as the driving gear, and the second paper belt mandrel 168 is used as the driven gear. When the detecting device 160 detects that the counting wheel 1613 rotates one week, the command is sent to the control device, and the motor 163 stops working. At this time, after the blank detection, the filter film 13 is transported to the lower side of the first through hole of the first chamber 14 by the passage of the 3-ray source 151, and the control device sends a control command to the third drive mechanism, the third drive mechanism. The seal assembly 17 is driven to move upward according to a control command from the control device until the filter membrane 13 is clamped between it and the lower end surface of the first chamber 14, at which time the getter pump is turned on, the getter pump is pumped, and the start is started. Sampling, air from intake manifold 121 And passing through the first chamber 14, the filter membrane 13 and the second chamber 171 in sequence, and discharging from the air outlet tube 122, the filter film 13 captures the particulate matter in the air, and after the sampling is finished, the control device controls the third driving mechanism to drive the seal. The assembly 17 moves downward to separate the filter 13 from the seal assembly 17, and the motor 163 that drives the second drive mechanism 161 operates to drive the filter 13 to rotate forward. When the detecting device 160 detects that the count wheel 1613 rotates one week. , then send an instruction to the control device \¥0 2019/127851 卩(:1' 2018/075534

, so that the motor 163 of the second driving mechanism 161 is stopped, at which time the filter 13 captures the particulate matter and transmits it to the concentration detecting component 15 to open the three sides of the filter 13 (the 3 ray source 151 and (3 flashes) Detector 152 to detect and record (3 ray source 151 passes through the filter 13 that captures the particulate matter (3 ray intensity! 1 2, according to the two detected (3 ray pass rate can calculate the air particle concentration It can be understood that the present application determines the moving distance of the filter 13 by detecting the number of rotations of the counting wheel 1613 disposed on the transmission path of the filter 13 by the detecting device 160 in the transmitting assembly to transport the filter 13 for precise reciprocating motion. By testing the blank at the same position of the filter 13 and collecting the sample (3 ray pass rate, the particle concentration test accuracy can be improved.

Referring to FIG. 5, FIG. 5 is a schematic structural view of a second embodiment of the particulate matter concentration detecting apparatus 10 of the present application. The present embodiment is different from the above-described first embodiment in that the particulate matter concentration detecting device 10 further includes a fluorescence detecting component adjacent to the concentration detecting component 15 and located in the filter film 13 The upper end is used to detect the type and content of elements in the air. The X-ray detecting component includes an X-ray tube 181, an optical splitting element 182, and a detector 183, the X-ray tube 181 generates an incident ray, excites a sample to be measured to generate X fluorescence, and the spectroscopic element 182 splits the fluorescence. To separate the spectral line of the element to be tested, the detector 183 detects the spectral line of the separated element to be tested to detect the sample element composition.

6, FIG. 6 is a schematic flow chart of a specific embodiment of a method for detecting a concentration of particulate matter. The detection method includes:

[0047] 3101. The control device drives the transport component to drive the filter to rotate forward to transfer the blank filter to the concentration detecting component.

[0048] In the step, the conveying assembly includes a first paper belt mandrel for winding the filter film, a first driving mechanism for driving the first paper tape mandrel to rotate in the forward and reverse directions, a second paper tape mandrel for winding the filter film, a second driving mechanism for driving the second paper tape mandrel to rotate in the forward and reverse directions, a first paper tape mandrel and a counting wheel and a rewinding wheel set for supporting the filter film on the filter conveying path between the second paper strip mandrels, and a detecting device corresponding to the counting wheel for detecting the number of revolutions of the counting wheel And a control device, wherein the control device is respectively connected to the detecting device, the first driving mechanism and the second driving mechanism, and controls operation of the first driving mechanism and the second driving mechanism according to the detection signal of the detecting device, When the filter is wound on the first tape mandrel and the second drive mechanism drives the second \¥0 2019/127851 卩(:17(:\2018/075534) When the paper cassette mandrel is rotating forward, the filter moves through the counting wheel and the rewinding wheel set to the direction of the second paper belt mandrel, when the detecting device detects When the counting wheel rotates by the preset number of turns, the second driving mechanism stops working. In this embodiment, when the counting wheel rotates once, the distance that the filter moves is the distance from the sample collecting position to (the distance of the 3-ray detecting position)

[0049] When the sample is not collected, if the filter film is wound on the first paper tape mandrel, the control device drives the second driving mechanism in the conveying assembly to operate, and the detecting device detects that the counting wheel rotates one week, then the cleaning is performed. The filter is delivered to the concentration detecting assembly, and the second drive mechanism is stopped.

[0050] 8102. In the concentration detection component (3 ray source emission (3 ray, in the concentration detection component (3 scintillation detector detection (3 ray source passes through the blank filter (3 ray intensity! 11 And record.

[0051] In this step, it is divided on both sides of the filter (3 ray source and (3 scintillation detector work, (3 ray source is emitted to the filter (3 ray, (3 scintillation detector detection (3 ray emission) The source passes through the blank filter (3 ray intensity! 1 1〇)

[0052] 3103. The control device drives the transport component to drive the filter to reverse, so that the filter is conveyed (the 3rd radioactive source penetrates below the first through hole of the first chamber).

[0053] In this step, the control device drives the first drive mechanism in the transport assembly to operate. When the detecting device detects that the counter wheel rotates one revolution, that is, the filter film is transported under the first through hole, the first drive mechanism stops working.

[0054] 8104. The third drive mechanism drives the seal assembly to move upward to clamp the filter between its upper end surface and the lower end surface of the first chamber.

[0055] In this step, the sealing assembly includes a second chamber, and a third driving mechanism is disposed therein to drive the sealing assembly to move up and down, and the upper end surface of the second chamber is provided with a second through hole. The filter seals the first through hole and the second through hole when the sealing assembly is moved upward by the driving of the third driving mechanism until the filter is clamped between the lower end surface of the first chamber and the second through hole .

[0056] 3105. Open the sample collection device, start sampling, and air enters from the sample collection device, and sequentially passes through the first chamber and the filter membrane, and the filter membrane captures particles in the air.

[0057] In this step, the second chamber is provided with a through second through hole, and the sample collection device includes an intake pipe, an air outlet pipe, and an air suction pump, the air intake pipe and the air, and the first The air chamber is connected to the second through hole of the lower end surface of the second chamber, and the air suction pump is connected to the air outlet tube. Open the suction pump in the sample collection device, pump the suction pump, start sampling, and air from the sample collection device. \¥0 2019/127851 卩 (: 1' 2018/075534 intake pipe enters, passes through the first chamber, passes through the first through hole to the filter, and passes through the filter membrane, enters the second chamber and passes through the outlet pipe Discharge, the filter can capture particles in the air.

[0058] 3106. After the sampling is completed, the control device drives the transport component to drive the filter to rotate forward to transfer the filter to the concentration detecting component.

[0059] 8107. (3 ray source emission (3 ray, (3 scintillation detector detection (3 ray source passes through the membrane that captures the particles (3 ray intensity and recorded.

[0060] 8108. Calculating the particulate matter concentration of the air according to the (3 ray intensity 111 and (3 ray intensity 112) detected by the (3 scintillation detector).

[0061] In some other embodiments, the method according to the (3 scintillation detector detected (3 ray intensity! 11 and (3 ray intensity calculated air particulate concentration further comprises: the control device drives the transport component to drive The filter is rotated forward to transfer the particles captured by the filter to the X-ray detection module to detect the type and content of the elements in the air.

[0062] In summary, the present invention can drive the filter to move back and forth by the transport assembly. If the filter is wound on the first tape mandrel before the sample is collected, the second drive mechanism in the transfer assembly is driven. The second paper strip mandrel rotates forward to drive the filter film to rotate forward, that is, the filter film moves toward the second paper strip mandrel through the counting wheel and the rewinding wheel set, and the detecting device detects that the counting wheel rotates the number of turns When the number of turns is preset, the control device controls the second drive to stop working to detect the blank filter (3 ray pass rate; after the detection is completed, the control device drives the first drive mechanism to drive the filter reverse, when the detecting device When the number of rotations of the counting wheel is detected as the preset number of turns, the first driving mechanism stops working, and after the blank detection, the filter is transmitted (the 3-ray source penetrates to the sample collecting place to make the filter capture the air sample) After the sampling, the control circuit drives the second driving mechanism to drive the filter to rotate forward to detect the sample collection (3 ray pass rate, according to the two detections (3 ray pass rate can calculate the air) According to the particle concentration, the present invention determines the moving distance of the filter by detecting the number of rotations of the counting wheel disposed on the filter conveying path by the detecting device in the conveying assembly, to transport the filter accurately and reciprocatingly, in the filter After testing the blank sample and collecting the sample at the same position (3 ray pass rate, it is ensured that the blank detection, air particle collection and detection are all in the same position of the filter, thereby improving the accuracy of the particle concentration test.

The above description is only a preferred embodiment of the present invention, and is not intended to limit the scope of the application. Those skilled in the art can apply various equivalent modifications and improvements to the above embodiments. \¥0 2019/127851 等同 (: 1' 2018/075534 The equivalent changes or modifications made within the scope of the request shall fall within the scope of this application.

Summary of invention

technical problem

Problem solution

Advantageous effects of the invention

Claims

\¥0 2019/127851 卩(:1' 2018/075534 Claims

[Claim 1] A transfer assembly for transporting a filter reciprocation, characterized in that: the transfer assembly includes a first tape reel for winding a filter, and one for driving the first a first driving mechanism for rotating the tape spool in the forward and reverse directions, a second paper tape mandrel for winding the filter film, and a second driving for driving the second paper tape mandrel to rotate in the forward and reverse directions a mechanism, a counting wheel and a rewinding wheel set for supporting the filter disposed on the filter conveying path between the first tape mandrel and the second tape mandrel, one correspondingly disposed on the counting wheel a detecting device for detecting the number of rotations of the counting wheel and a control device, wherein the control device is respectively connected to the detecting device, the first driving mechanism and the second driving mechanism, and is controlled according to the detection signal of the detecting device The operation of the first driving mechanism and the second driving mechanism, when the filter film is wound on the first paper tape mandrel and the second driving mechanism drives the second paper tape mandrel to rotate forward, the filter passes through the counting wheel and is inverted The pulley set moves in the direction of the second tape mandrel When the detecting device detects that the counting wheel rotates by the preset number of turns, the second driving mechanism stops working.

[Claim 2] The transfer assembly according to claim 1, wherein: the second drive mechanism has the same structure as the first drive mechanism, and the first drive mechanism includes a motor, a gear meshing with the motor, a clutch, and a damper, the damper is sleeved on a transmission shaft in the clutch, the clutch is connected to the motor through the gear, and the first paper belt mandrel is connected to the transmission shaft; The wheel set includes a first rewinding wheel, a second rewinding wheel and a third rewinding wheel. When the filter film is wound on the first tape reel and the motor of the second driving mechanism is operated, the second driving mechanism The driven second paper tape mandrel is used as a driving gear, and the first paper tape mandrel is used as a driven gear, and the filter film sequentially passes through the first rewinding wheel, the counting wheel, the second rewinding wheel and the third The rewinding pulley is moved to move in the direction of the second tape spool.

[Claim 3] The transfer assembly according to claim 2, wherein: the first drive mechanism further includes a paper tape gland, and the paper tape gland is fixedly mounted on the first paper tape mandrel on.

[Claim 4] A particulate matter concentration detecting device, comprising: a casing, a sample collecting device disposed on the casing, and a filter disposed in the casing, a chamber, a concentration detecting assembly, and a transfer assembly, wherein the sample collection device is in communication with air, the first chamber is in communication with the sample collection device, and at a lower end thereof \¥0 2019/127851 卩(:1' 2018/075534 is provided with a first through hole, the filter film is laid on the lower end surface of the first chamber, and the concentration detecting component is opposite to the first chamber Adjacent, comprising: a 3-ray source and (3 scintillation detectors) respectively disposed on both sides of the filter membrane, the transport assembly being the transport assembly according to any one of claims 1-3, in the transport assembly The first driving mechanism and the second driving mechanism are respectively disposed at the first chamber and the two ends of the concentration detecting component for driving the filter to translate between the first chamber and the concentration detecting component.

[Claim 5] The particulate matter concentration detecting apparatus according to claim 4, wherein: the particulate matter concentration detecting device further comprises a sealing assembly, the sealing assembly is located below the first chamber, and the sealing assembly comprises There is a second chamber, and a third driving mechanism is disposed therein to drive the sealing assembly to move up and down, the third driving mechanism is controlled by the control device, and the second end surface of the second chamber is provided with a second through hole When the sealing assembly is moved upward by the driving of the third driving mechanism until the filter is clamped between the lower end surface of the first chamber, the filter seals the first through hole and the second through hole Live, the air entering the first chamber passes through the filter membrane and enters the second chamber, and the particles in the air are captured by the filter membrane.

[Claim 6] The particulate matter concentration detecting apparatus according to claim 5, wherein: the second through hole penetrates the second chamber, and the sample collecting device includes an intake pipe, an air outlet pipe, and an air intake a pump, the intake pipe is in communication with the air and the first chamber, the air outlet pipe is connected to the second through hole of the second chamber, and the air suction pump is connected to the air outlet pipe.

[Claim 7] The particulate matter concentration detecting apparatus according to claim 4, wherein the particulate matter concentration detecting device further comprises a fluorescence detecting component, the X fluorescence detecting component is adjacent to the concentration detecting component, and is located The upper end of the filter membrane detects the type and content of elements in the air.

[Attachment 8] A method for detecting a concentration of a particulate matter, wherein the detecting method comprises:

The control device drives the transport component to drive the filter to rotate forward to transfer the blank filter to the concentration detecting component;

In the concentration detection component (3 ray source emission (3 ray, the concentration detection component (3 scintillation detector detection (3 ray source passes through the blank filter (3 ray intensity! 11 and recorded; \¥0 2019/127851 卩(:17(:\2018/075534 control device drives the transport unit to drive the filter to reverse, to pass the filter (the first pass to the first chamber through the penetration of the 3-ray source) Below the hole;

Opening the sample collection device, starting sampling, air enters from the sample collection device, passes through the first chamber and the filter in sequence, and the filter captures particulate matter in the air;

After the sampling is finished, the control device drives the conveying component to drive the filter to rotate forward to transfer the particulate matter to the concentration detecting component;

(3 ray source emission (3 ray, (3 scintillation detector detection (3 ray source passes through a membrane that captures particulate matter (3 ray intensity and recorded;

The particle concentration of the air was calculated according to the (3 ray intensity! 11 and (3 ray intensity) detected by the 3 scintillation detector.

[Claim 9] The method for detecting a concentration of particulate matter according to claim 8, wherein the control device drives the transport unit to drive the filter to reverse, so that the filter is transported to the third place. The lower portion of the first through hole of the chamber further includes: the third drive mechanism drives the seal assembly to move upward to clamp the filter between the upper end surface thereof and the lower end surface of the first chamber.

[Claim 10] The method for detecting a concentration of particulate matter according to claim 8, wherein the particle concentration of the air is calculated according to the (3 ray intensity! 11 and (3 ray intensity) detected according to the (3 scintillation detector) The following further includes: The control device drives the transport component to drive the filter to rotate forward to transfer the particulate matter captured by the filter to the X-ray detection component to detect the type and content of the elements in the air.