CN211669014U - Particulate matter monitor - Google Patents

Abstract

A particulate matter monitor (10), comprising: a paper tape (1) on which particulate matter is enriched; an optical recognition device (2) configured to recognize optical marks on the paper strip; a paper feeding device (3) including a paper feeding tray (31) and a paper collecting tray (32), and a driving mechanism configured to drive a paper tape from the paper feeding tray (31) to the paper collecting tray (32) through the optical recognition apparatus (2); a controller configured to be associated with an optical recognition device; the optical identification comprises a light hole, the optical identification device (2) sends an electric signal to the controller when identifying the light hole, and the controller can control the paper feeding device (3) based on the received electric signal so that the paper is taken away by a preset distance. The particulate matter monitor (10) simplifies a paper feeding device while ensuring that the paper feeding distance of the paper tape is a paper feeding step length, and can provide monitoring of the remaining length of the paper tape (1).

Description

Particulate matter monitor

Technical Field

The utility model relates to an environment field to concretely relates to a particulate matter monitor for monitoring environmental particulate matter.

Background

For particulate matter monitors, paper tape is a necessary consumable. The paper tape is provided with a filter membrane for enriching the particulate matters. After the particulate matter on the paper tape has accumulated to a certain extent, the measurement of the particulate matter by the monitor is affected. At this point, the paper strip needs to be moved a length to move a new length of paper strip to the particulate rich position to continue the measurement. This extent of movement of the tape is referred to as the "feed step length" and the movement of the tape is also referred to as the "feed".

With continuous paper feeding, the paper tape can be used up gradually, and an operator needs to replace a new paper tape in time when the paper tape is about to be fed out, so that the monitor can operate normally, and therefore the available residual length of the paper tape needs to be monitored.

In current particulate matter monitors, there are such step size monitoring settings: in the monitor, the paper tape drives the roller, the step length is monitored by identifying the grating on the roller by the optical identification equipment, and no mark is arranged on the paper tape. In such an arrangement, slip is likely to occur between the tape as the driving member and the roller as the driven member causing a paper feed error, and if tensioning the tape increases the friction between the tape and the roller to overcome the friction, there is again a risk of the tape breaking.

In contrast, there is also a monitor in which a tension pulley is not used in a paper feeding mechanism. For example, CN 207882113U (published: 2018, 9, 18) discloses a particulate matter monitoring device for intelligently measuring the step length of a paper tape, wherein an identifiable marker such as a two-dimensional code or a special bar code sprayed on the paper tape is identified by a pattern recognition device located on one side of the paper tape, and further the operation of a motor and a clutch is controlled to realize the fixed-step paper feeding. However, in such a particle monitoring device, since the marker on the paper tape is sprayed on the additional marker on the paper tape, such as the two-dimensional code, the accuracy of pattern spraying may affect the recognition of the pattern recognition device, and the material of the paper tape itself may also affect the spraying effect, thereby affecting the signal sent by the pattern recognition device, and finally causing an error in paper feeding.

For the monitoring of the residual length of the paper strip available, it is currently common to record, by a monitor, the length of the used paper strip after each change of paper strip and subtract it from the length of the complete paper strip to obtain the residual length, the paper strip itself also not being provided with any indication for indicating the residual length, which results in the fact that in some cases an accurate monitoring of the residual length of the paper strip cannot be achieved, for example:

after a monitor outage, or a sudden shutdown restart, or a software upgrade, the particulate matter monitor loses a record of the length the paper tape has traveled;

the total length of tape actually available at the start of use does not necessarily equal the total length of the intended complete tape, for example because the roll of paper exchanged may have been partially used, or there is a partial loss of tape.

In order to overcome this problem, some attempts have been made, for example, CN 101782495 a (publication date: 21/7/2010) discloses a filter paper tape and an early warning method and device using the filter paper tape, wherein a marker is provided at the end of the filter paper tape body, the marker is an absorber and an emitter of a specific signal capable of causing an abnormality in the detection signal, a corresponding detection unit is provided in the device using the filter paper, and the signal obtained by the detection unit is processed by an analysis unit when in use, and a preliminary warning that the filter paper tape needs to be replaced is issued if there is an abnormality in the signal. In this document, the identifier and the detection unit need to satisfy a certain correspondence, for example: the marker is an aluminum film on the filter paper tape, and the detection unit is a radiation source and a Geiger counter which are arranged on two sides of the paper tape; the marker is permanent magnetic powder, and the detection unit is a Hall effect sensor; the marker is photoinduced energy storage fluorescent powder, and the detection unit is a ray source, a Geiger counter, a fluorescent lamp and a spectrometer. However, such markers also require the addition of additional substances to the paper strip to form them, and may be radioactive, which makes the operation costly and presents a certain safety risk, health threat, to the user of the particulate monitor.

Accordingly, it remains desirable to provide an improved particulate matter monitor that accurately controls the paper advance while providing reliable monitoring of the remaining length of the paper tape used, ensuring that the particulate matter monitor is maintained in time and does not interrupt monitoring for long periods of time waiting for paper tape replacement.

SUMMERY OF THE UTILITY MODEL

The utility model relates to a accomplish in view of above-mentioned technical problem, its aim at provides a particulate matter monitor, and this particulate matter monitor includes:

a paper tape for enriching the particulate matter thereon,

an optical recognition device configured to recognize an optical mark on the paper tape;

a paper feeding device including a paper feeding tray and a paper collecting tray, and a driving mechanism configured to drive a paper tape from the paper feeding tray to the paper collecting tray through the optical recognition apparatus, wherein the paper tape roll is mounted on the paper feeding tray;

a controller configured to be associated with the optical recognition device;

the optical identification comprises a light hole, the optical identification equipment sends an electric signal to the controller when identifying the light hole, and the controller can control the paper feeding device based on the received electric signal so that the paper is taken away by a preset distance.

The utility model discloses a under the situation, this predetermined distance is just in time the paper feed step length of particulate matter monitor, makes the distance that the paper feed device can accurately control the paper tape and remove from this.

For optical recognition devices, the optical markings on the paper tape differ significantly in optical effect from the non-marking areas of the paper tape.

Compared with the prior art that the optical marking is carried out by adding the paper tape, the light-transmitting holes are simpler to arrange on the paper tape, the cost is lower, and the possible risks to the user are avoided.

The optical identification device is preferably a contactless optical device, in particular a transmitted light chopper comprising a light wave emitting part and a receiving part arranged on either side of the paper strip.

Because the transmitted light chopper is relatively mature, the realization form is easy and the application cost is low.

The use of a transmitted light chopper also provides the advantage that, since the light waves emitted by the light wave emitting portion have a particular wavelength, the light waves of this particular wavelength can be easily distinguished by the receiving portion from light waves emitted by other light sources in the environment and are thus less susceptible to interference from, for example, natural light sources. In addition, the light wave is also stronger than the diffuse reflected light intensity received by the optical recognition device arranged on only one side of the paper tape, so that the reliability of the transmission light chopper is higher in terms of the optical recognition effect as a whole.

Specifically, during paper feed, the paper tape passes between the light wave emitting and receiving portions of the transmitted light chopper. When the light-transmitting holes in the paper tape are positioned between the light wave transmitting part and the receiving part, the receiving part can receive light waves with specific wavelengths emitted by the light wave transmitting part, so that the light-transmitting chopper generates an electric signal, and the electric signal represents 'yes' for example; when the paper tape with the light holes passes through the transmission light chopper, the electric signal sent by the transmission light chopper changes along with the passing of the light holes, such as the change of the height of the sent signal, such as pulse.

For the change of the electric signal sent by the transmitted light chopper, the controller of the particulate matter monitor provides a coding rule, different electric signals or combinations thereof correspond to different codes according to the coding rule, and the different codes represent different information.

Therefore, the controller of the particulate matter monitor controls the paper feeding device based on the received codes corresponding to the electric signals sent by the transmitted light chopper.

Preferably, the strip is provided with a plurality of light-transmitting holes, arranged one after the other along the length of the strip, the particular arrangement of these holes being made according to a predetermined code. Specifically, for example, a code is predetermined based on a coding rule of the particulate matter monitor according to information to be reflected, and further, a combination of the electric signals of the corresponding optical chopper or a change in the electric signals is determined based on the code, and the combination or the change may be, for example, the number of times the light-transmitting chopper detects the light-transmitting holes on the paper tape within a predetermined time period, so that a plurality of light-transmitting holes are correspondingly provided on the paper tape according to the change in the electric signals, for example, the number of times the signal representing "presence", the interval of occurrence, and the like.

Therefore, based on the above-described coding rule, a set of a plurality of light-transmitting holes arranged at different intervals may correspond to predetermined codes having different meanings.

Preferably, the paper strap comprises a first portion in which the light-transmissive holes are spaced apart from each other by a first predetermined spacing, the predetermined distance being an integer multiple of the first predetermined spacing, i.e. the paper advance of the particulate monitor.

In the first part, the combination of the plurality of light-transmitting holes corresponds to a code such that the controller controls the distance that the paper tape is moved by the paper feeding device to move the paper tape through a predetermined distance, i.e., a paper feeding step.

Specifically, assuming that the paper feeding step is n times the first predetermined interval between the light-transmitting holes, where n is an integer, every n light-transmitting holes in the first portion of the paper tape are in a combination, and the controller controls the paper feeding device according to a first code corresponding to the combination by: when the controller receives n electric signals from the transmission light chopper within a preset time length, namely the paper tape with the length of n light holes passes through the transmission light chopper within the preset time length, the controller correspondingly indicates that the paper tape normally runs by one step. At this time, the controller may control the driving mechanism of the paper feeding device to stop until the next time the area on the paper tape in which the particulate matter is enriched (also referred to as "particulate matter enrichment area") is enriched to a certain extent, and the paper tape is fed forward one step long, and the paper feeding device starts to feed again.

Preferably, the particulate matter monitor further comprises an alarm, and the controller is configured to trigger the alarm to give an alarm when a spacing between adjacent light-transmitting holes in the first portion of the paper tape is not equal to a first predetermined spacing, and to control the paper feeding device to pause paper feeding of the paper tape. This case corresponds to: when the paper tape is fed, if the controller does not receive a code consisting of n electric signals from the transmission light chopper within a preset time length in the first part of the paper tape, namely the paper tape is not fed within the preset time length and comprises the length of n light transmission holes, the paper feeding abnormality is judged, and an alarm is triggered to send an alarm to remind a monitor user. The case of causing such a paper-feeding abnormality may be a break of the paper tape in use or an abnormality in driving of the paper tray by the paper-feeding device, in which case the paper-feeding by the paper-feeding device should be suspended at the same time until the user or maintenance personnel comes to cancel the alarm to eliminate the paper-feeding abnormality and then resume the use of the particulate matter monitor.

More preferably, in the first portion of the paper strip, the first predetermined spacing between the light-transmissive holes is equal to the paper advance. In this case, when the controller receives 2 electric signals from the transmission chopper within a predetermined time period, the paper tape is normally fed by one paper feed step, and the controller controls the driving mechanism of the paper feeding device to stop feeding the paper tape.

Preferably, the paper strap further comprises a second portion in which the spacing of the light-transmitting apertures is set to be less than a first predetermined spacing between the light-transmitting apertures in the first portion, and the controller is configured to trigger the alarm to sound upon receipt of a predetermined code from the transmitted light chopper corresponding to the light-transmitting apertures in the second portion.

In particular, in the second portion of the paper strip, the light-transmissive holes are not necessarily equally spaced, but the spacing of each light-transmissive hole in the second portion is always less than the first predetermined spacing between adjacent light-transmissive holes in the first portion. Thus, when the second portion of the paper strip passes through the transmission light chopper, the code corresponding to the change in the electrical signal emitted by the transmission light chopper will be different from the code emitted by the transmission light chopper when the first portion of the paper strip passes through, for example, the frequency at which the change in the signal level occurs will be higher, i.e., more light transmission holes will pass through the transmission light chopper within a predetermined length of time.

Preferably, the code corresponding to the arrangement of the combination of light-transmissive holes in the second portion of the paper strip is used to monitor the remaining length of the paper strip. Specifically, the light-transmitting holes are arranged at equal intervals at a second predetermined interval smaller than the first predetermined interval in the second portion of the paper tape. In this case, when the second portion of the paper tape passes through the transmitted light chopper and an electrical signal is sent, the controller controls the alarm to send an alarm according to the code corresponding to the change of the received electrical signal, and the alarm is used for prompting a user of the particulate matter monitoring instrument that the remaining length of the paper tape is less than a predefined remaining length threshold value.

In this case, optionally, the second portion of the paper strip is disposed near and at a distance from the end of the paper strip, for example twenty paper steps. Under this condition, still there is certain time from the alarm is sent out the police dispatch newspaper to the paper tape is used up completely, and maintainer can in time change the paper tape and can not influence the normal operating of particulate matter monitor during this period.

Optionally, other optical markings may be provided on the paper tape to verify that the paper tape is the particular paper tape corresponding to the particulate monitor being used.

Optionally, the optical marking is also constituted by a combination of light-transmissive holes provided on the paper strip, the combination of which corresponding to a predetermined code can be used to characterize a specific property/characteristic of the paper strip, for example various physical/chemical properties. The specific property may also correspond to, for example, the particulate matter monitor to which the paper tape is specifically applied, for example reflecting the manufacturer of the paper tape or the type of instrument available.

In this case, the controller is configured to, when the code corresponding to the electric signal emitted by the transmitted light chopper corresponds to the above-mentioned specific attribute, judge whether or not the attribute coincides with the specific attribute defined in advance in the particulate matter monitor in which the controller is located, and if not, control the alarm to issue an alarm and suspend the drive mechanism of the paper feeding device. This alarm is used for the suggestion user to confirm whether used the paper tape that corresponds with the particulate matter monitor to influence monitoring quality or even cause the damage to the particulate matter monitor by the paper tape that does not correspond.

Alternatively, the other optical identifier may be an optical identifier that can be visually confirmed or recognized by other optical recognition devices. The determination of whether the particular attribute corresponds to the particulate matter monitor may also be made by means of visual or other optical identification devices other than a transmitted light chopper, such as a code scanner, or the like.

Preferably, to avoid that the provision of light-transmitting holes in the paper strip interferes with the monitoring of the particulate matter, said holes are provided at the edges of the paper strip in the width direction of the paper strip, spaced from the area enriched with particulate matter, and preferably at a maximum distance from this area.

Preferably, the light-transmitting holes are circular to ensure a maximum amount of light transmission, but other shapes of light-transmitting holes are also conceivable, such as triangular holes, rectangular holes, polygonal holes, etc.

Preferably, the paper feeding device comprises a paper tape motor, and the paper tape motor drives the paper collecting disc, so that the arrangement of the grating roller in the existing paper feeding device is simplified, and the phenomenon that paper feeding is inaccurate due to the fact that the paper tape is easy to slip when the paper feeding disc serves as a driving disc and the grating roller needs to be driven is solved or avoided.

Additional features and advantages described herein will be set forth in the detailed description which follows, and in part will be readily apparent to those skilled in the art from that description or recognized by practicing the embodiments described herein, including the detailed description which follows, as well as the appended drawings.

Drawings

With reference to the above purposes, the technical features of the invention are clearly described in the claims below, and its advantages are apparent from the following detailed description with reference to the accompanying drawings, which illustrate, by way of example, a preferred embodiment of the invention, without limiting the scope of the inventive concept.

Fig. 1 shows a particulate matter monitor according to the invention in a front view;

fig. 2 shows a transmitted light chopper in a particulate matter monitor according to the present invention;

FIG. 3 schematically illustrates the arrangement of light-transmissive holes in a first portion of a paper strap;

fig. 4 exemplarily shows the arrangement of light-transmissive holes in the first and second portions of the paper strap.

List of reference numerals:

1, paper tape;

11 light holes;

12 a zone enriched in particulate matter;

2 a transmitted light chopper;

21 a light wave emitting portion;

22 a receiving section;

3 a paper feeding device;

31 a paper feed tray;

a 32 catch tray;

33 a guide wheel;

4, measuring a head;

5 an air pipeline;

10 a particulate matter monitor;

d1 first predetermined interval;

d2 second predetermined interval.

Detailed Description

Referring now to fig. 1-4, a particulate matter monitor, generally designated 10, in accordance with the present invention is described, the particulate matter monitor 10 including:

the paper strip 1, on which the particulate matter is enriched, is indicated with the reference numeral 12, which is shown in dashed lines in fig. 3, it being noted that this illustration is merely schematic, and the shape of the region 12 enriched with particulate matter when the particulate matter monitor 10 is in actual use is not necessarily elliptical, nor is its specific location limited to that shown in fig. 3;

a transmitted light chopper 2 comprising a light wave emitting portion 21 and a receiving portion 22 arranged on either side of the paper strip 1;

a paper feed device 3 for the paper tape 1, the paper feed device 3 comprising a paper feed tray 31 on which the paper tape roll is mounted, a paper collection tray 32, and a drive mechanism not shown in the figures, such as a paper tape motor (in the view of fig. 1, the paper tape motor is on the rear side of the measuring head 4 and is therefore not visible), wherein the drive mechanism is configured such that the paper tape 1 passes from the paper feed tray 31 through the transmission chopper 2 to the paper collection tray 32, and as shown in the figure, the paper tape device further comprises a guide wheel 33, the guide wheel 33 serving to define the paper tape 1 on a fixed trajectory, avoiding that the position of the paper tape 1 out of the paper feed tray 31 changes due to the gradual reduction in the diameter of the paper tape roll on the paper feed tray 31 as the paper is fed, affecting the paper feed stability of the particulate monitor 10;

a measuring head 4 for measuring the particles in the region 12 enriched with particles, the opening and closing of the measuring head 4 being effected by a cam controlled by a motor (not shown) rotating into different positions, wherein the measuring head is arranged to press the paper tape 1, avoiding air leakage of the paper tape;

an air line 5 for introducing ambient air containing particulate matter to be measured into an enrichment position, for enrichment of particulate matter on the paper tape 1 for measurement by the particulate matter monitor 10;

a controller (not shown) configured to be associated with the transmitted light chopper 2; and

an alarm (not shown) controlled by the controller and capable of giving an alarm to the outside.

The control of the paper feed step length of the paper tape 1 and the monitoring of the remaining length of the paper tape 1 by the particulate matter monitor 10 according to the present invention will be further explained with reference to fig. 2 to 4.

In fig. 2 a detailed view of the transmitted light chopper 2 is shown, wherein the light wave emitting portion 21 and the receiving portion 22 form an integral U-shaped piece, through the middle of which opening, in use, the paper strip 1 passes horizontally.

In fig. 3, a first portion of the paper strip 1 is exemplarily shown, in which a plurality of light-transmitting holes 11 are provided at equal intervals along the length direction, i.e. the longitudinal direction, of the paper strip at first predetermined intervals D1. The light-transmitting holes 11 are spaced as far as possible across the width of the paper strip 1 from the area 12 enriched with particulate matter to avoid affecting the effect of particulate matter enrichment on the paper strip 1, the area 12 being only schematically shown in broken lines in fig. 3, it being noted that this oval shape is only schematic and not fixed. The first predetermined interval D1 is equal to the paper advance step size of the particulate matter monitor 10, which may be 40mm, for example. By virtue of the arrangement of the distance between the light chopper 2 and the measuring head 4 in cooperation with the first predetermined spacing D1, it is ensured that the region 12 enriched with particles is located on the paper web 1 on the midperpendicular of the connecting line between two adjacent light-transmitting openings 11, and that the measuring head 4 is aligned as far as possible with the region 12 of the paper web enriched with particles.

In use, the particulate matter monitor starts a paper feeding operation after a rolled paper tape 1 is loaded on a paper feeding tray 31 and connected to a paper collecting tray 32 via a transmission chopper 2. After the area 12 of the paper web 1, which is now in the particle-enriched position, has been enriched with particles or after the enriched particles have affected the continuation of the measurement, the paper advance device 3 has to advance the paper web 1 by one step. At this time, the paper collecting tray 32 is driven by the paper tape motor to rotate, the paper tape 1 is driven to advance, the light transmission holes 11 on the paper tape pass through the transmission light chopper 2, the light emitted by the light wave emitting part 21 is received by the receiving part 22, and the transmission light chopper 2 emits an electric signal, such as a pulse signal. When the transmitted light chopper 2 receives such an electrical signal from two transmitted light choppers for a given length of time, which means that the light-transmitting holes 11 in the first part of two successive paper strips 1 have passed the transmitted light chopper 2, the paper strip 1 has been fed in a step of 40 mm. At this time, the controller controls the tape motor of the paper feeding device 3 to stop feeding paper.

If the controller does not receive a code corresponding to the combination of 2 adjacent light-transmitting apertures 11 spaced apart at D1 for a given length of time, the controller of the particulate matter monitor 10 controls the alarm to sound an alarm. At this time, there is a possibility that the paper tape is broken, exhausted or the paper feeding mechanism malfunctions, so that the paper tape 1 does not pass through the transmitted light chopper 2 by a paper feeding step length equal to the first predetermined interval D1 for a predetermined length of time, at which time the controller controls the paper feeding device 3 to pause the paper feeding until the maintenance personnel check the maintenance before the alarm is released to continue the paper feeding monitoring.

In fig. 4, a paper strip 1 is exemplarily shown comprising a first portion in which light-transmissive holes 11 are arranged at a first spacing D1 as described above, the first spacing D1 being 40mm equal to the paper advance step; whereas in the second section the light-transmissive holes 11 are arranged at a second spacing D2, D2 being smaller than D1, for example in the range between 20 and 40 mm.

In fig. 4, the second portion of the strip 1 comprises three holes 11 equally spaced at a second spacing D2, but it will be understood that more or less than three light-transmissive holes 11 may be provided in the second portion, and that D2 may also be other values less than D1, the second portion being provided at a distance from the end of the strip 1, here at twenty steps from the end of the strip, i.e. 800mm, but it will be understood that more or less than twenty steps are conceivable.

When the first portion of the paper tape 1 passes through the transmitted light chopper 2, the controller controls the paper feed of the tape motor as described above and will not be repeated here. When the second portion of the paper strip 1 passes through the transmission chopper 2, the change in the electrical signal emitted by the transmission chopper corresponds to a further given code which represents a remaining length of the paper strip which is less than a predefined paper strip remaining length threshold value, for example a remaining usable paper strip 1 length of less than 700mm, since the 3 light-transmitting holes 11 provided at the second predetermined interval D2 in the second portion pass through the transmission chopper 2 within a given time. When the controller receives the code representing that the paper tape is about to be used up, the controller controls the alarm to give an alarm to remind a user or a maintenance person of replacing the paper tape roll with a new paper tape roll for the particulate matter monitor 1 in time. At this time, since there are twenty steps from the complete exhaustion of the paper tape 1, a maintenance person or a user has a certain time margin to replace the paper tape roll in time without affecting the normal operation of the particulate matter monitor 10.

Alternatively, the light-transmissive holes 11 in the second portion may be arranged at unequal intervals according to a predetermined code corresponding to a residual length of the ribbon being less than a threshold value.

It should also be noted that although in the example shown in figure 4 the second portion of the paper strip 1 is arranged between two first portions of the paper strip 1, other arrangements of the second portion of the paper strip 1 are possible.

Alternatively, the alarm of the particulate matter monitor may be an audible alarm or a warning light of a different color to alert a user of the particulate matter monitor.

It should be noted that the size of the light-transmitting holes 11 and the spacing between the light-transmitting holes, such as the first predetermined interval D1 and the second predetermined interval D2, are designed so that the air-tightness and strength of the paper tape 1 are not affected when the light-transmitting holes are provided thereon for a specific paper tape 1, so that no tape breakage occurs during paper feeding.

Alternatively, although not shown here, the light-transmitting holes 11 may be arranged not in line in the longitudinal direction of the paper tape 1, but two or more light-transmitting holes 11 may be arranged side by side, in which case a plurality of light-transmitting choppers 2 are correspondingly arranged in the particulate monitor 10.

Alternatively, the shape or pattern of the light-transmitting holes 11 themselves or the shape or pattern of the plurality of light-transmitting holes 11 may be used to identify a particular property/characteristic of the paper tape, or the paper tape 1 may be provided with other optical markings that may be identified by additional optical devices to reflect various physical/chemical properties of the paper tape 1. Such as the manufacturer of the paper tape 1 or the instrument model of the applicable particulate monitor.

When the optical identification device recognizes the optical identifier, a signal is sent to the controller, and the controller determines whether the specific attribute/characteristic is suitable for the particulate monitor 10. If the paper tape is not matched, the controller controls the alarm to give a warning to prompt a user that the used paper tape 1 is not matched with the particulate matter monitor 10, and controls the paper feeding device 3 to stop feeding the paper, so that the unmatched paper tape 1 is prevented from influencing the operation of the particulate matter monitor 10 and even damaging the particulate matter monitor 10 due to the property/characteristic of the paper tape 1.

While the present invention will be described in conjunction with the exemplary embodiments, it will be appreciated that this description is not intended to limit the invention to those exemplary embodiments. On the contrary, the invention is intended to cover not only these exemplary embodiments, but also various alternatives, modifications, equivalents and other embodiments, which may be included within the spirit and scope of the invention as defined by the appended claims.

Claims (10)

1. A particulate matter monitor (10), comprising:

a paper tape (1) for enriching the particulate matter thereon,

its characterized in that, particulate matter monitor still includes:

an optical recognition device (2) configured to recognize an optical marking on the paper tape;

a paper feeding device (3) including a paper feeding tray (31) and a paper collecting tray (32), and a driving mechanism configured to drive the paper tape (1) from the paper feeding tray (31) to the paper collecting tray (32) through the optical recognition apparatus (2);

a controller configured to be associated with the optical recognition device;

wherein the optical identification comprises a light-transmitting hole (11), the optical identification device (2) sends an electric signal to the controller when identifying the light-transmitting hole (11), and the controller can control the paper feeding device (3) based on the received electric signal so that the paper tape (1) moves through a preset distance.

2. The particulate matter monitor (10) as claimed in claim 1, wherein the light-transmissive holes (11) in the paper strip (1) are provided in a predetermined code.

3. The particulate matter monitor (10) of claim 2, wherein the paper strap (1) includes a plurality of light-transmissive holes (11) arranged sequentially along a length of the paper strap.

4. The particulate matter monitor (10) as claimed in claim 3, characterized in that each light-transmissive hole (11) is arranged at an edge of the paper tape (1) in the width direction of the paper tape, spaced apart from the region (12) of the paper tape (1) enriched with particulate matter.

5. The particulate monitor (10) as set forth in claim 4, characterized in that the paper strap (1) comprises a first portion in which the light-transmissive holes (11) are spaced apart from each other by a first predetermined spacing (D1), the predetermined distance being an integer multiple of the first predetermined spacing (D1).

6. The particulate matter monitor (10) of claim 5, wherein the first predetermined spacing (D1) is equal to the predetermined distance.

7. The particulate matter monitoring instrument (10) as claimed in claim 5, further comprising an alarm, wherein the controller is configured to trigger the alarm to issue an alarm and control the paper feeding device (3) to pause paper feeding when a spacing between adjacent light-transmitting holes (11) in the first portion of the paper tape (1) is not equal to the first predetermined spacing (D1).

8. The particulate matter monitor (10) as set forth in claim 5, further comprising an alarm, and wherein the paper strap further comprises a second portion in which the spacing of the light-transmissive holes (11) is less than the first predetermined spacing (D1), and wherein the controller is configured to trigger the alarm to sound when the light-transmissive holes (11) in the second portion are identified by the optical identification device.

9. The particulate monitoring instrument (10) as set forth in claim 8, characterized in that the alarm issues an alarm when the spacing of the light-transmissive holes (11) in the second portion of the paper strip (1) is a second predetermined spacing (D2) indicating to a user of the particulate monitoring instrument (10) that the remaining length of the paper strip (1) is less than a predefined remaining length threshold.

10. The particulate matter monitor (10) as set forth in any one of claims 1-9, characterized in that the optical identification device comprises a transmitted light chopper including a light wave emitting portion (21) and a receiving portion (22) disposed on either side of the paper strap.

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