Patent Description:
With wide application of technologies of wet electric dust removal, low-temperature electric dust removal, and the like in ultra-low emission transformation of coal-fired power plants, iron and steel, coking, and other enterprises, most of concentrations of smoke dust at a discharge port have reached below <NUM>/m<NUM>, which puts forward higher requirements for the detection accuracy of particulate matters in fume. The existing β-ray-based on-line monitor determines the concentration of ambient dust by measuring the adsorbed radiation quantity of the ambient dust in the atmosphere by using a β-ray absorption principle. The more rays are adsorbed, the higher the concentration of the ambient dust is; and on the contrary, the less rays are adsorbed, the lower the concentration of the ambient dust is. An ambient dust concentration monitor is specially designed for monitoring the ambient dust in ambient air. It is mainly used for the measurement of the concentration of the particulate matters in the fume by an absorption method in the fields of atmosphere quality monitoring networks, mobile monitoring stations, long-term background environment researches, industrial and mining enterprises, scientific research institutes, and the like. However, the existing monitor is not precise enough during filter tape feeding and collecting, and filter tape pressing and the filter tape feeding are prone to errors, which results in inaccurate collected data and large deviation of monitoring results.

<CIT> discloses an automatic device of survey binary channels particulate matter volume concentration, particulate matter separation sampling module is connected with appearance air humidity degree control module, and appearance air humidity degree control module's gas outlet is connected twin -channel sampling and is detected the module, twin -channel sampling detects two tunnel gas outlets of module and is connected with two way constant -current regulation modules respectively, the gas outlet of two way constant -current regulation modules is connected with the sampling pump through the three -way valve. <CIT> discloses but the concentration by mass of PM <NUM> and <NUM> particulate matters of PM in the device simultaneous determination atmospheric environment has simple structure, low, long, the quick accuracy of data of cycle of operation of maintenance cost, really realizes online automatic continuous monitor. <CIT> discloses a beta ray detector and a beta radiation source only needing really to have been realized by the device, both can accomplish the continuous online sampling process of binary channels, have simple structure, low, long, the quick accuracy of data of cycle of operation of maintenance cost, have reduced instrument cost and later maintenance cost, really realize online automatic continuous monitor.

<CIT> provides a portable atmospheric particulate concentration monitoring mechanism, which comprises a sampling rod and a monitoring host, and the monitoring host comprises a box body; the driving device comprises an air port movement unit and a paper tape movement unit; a sealing device; a flow rate control device; a detection device; wherein the paper tape moving unit comprises a paper tape feeding unit and a paper tape discharging unit; the device comprises a base, a paper tape, a first tape reel, a second tape reel in transmission connection with the first tape reel and a supporting wheel, the paper tape is wound on the first tape reel through the second tape reel, the supporting wheel and the detection device, the distance between the first tape reel and the second tape reel ranges from <NUM> to <NUM>, and the surface of the detection device is provided with an arc surface. The portable atmospheric particulate concentration monitoring mechanism provided by <CIT> is simple and compact in structure, convenient to carry and small in load.

<CIT> provides an atmospheric particulate concentration monitoring mechanism, which comprises a sampling rod and a monitoring host, and the monitoring host comprises a box body; the driving device comprises an air port movement unit and a paper tape movement unit; a sealing device; a flow rate control device; a detection device; wherein the gas port movement unit comprises a first motor, an eccentric shaft and a lifting unit communicated with the sampling rod; wherein one end of the eccentric shaft is connected with a rotating shaft of the first motor, the other end of the eccentric shaft is connected with the lifting unit, and the first motor drives an air port of the lifting unit to be in contact with and separated from a paper tape of the paper tape movement unit through the eccentric shaft. The atmospheric particulate concentration monitoring mechanism provided by <CIT> has the advantages of simple and compact structure, no abnormal sound, small load and convenience in measurement.

<CIT> relates to a fine dust automatic measuring device capable of simultaneously collecting heavy metal samples. The fine dust automatic measuring device can automatically measure a concentration of fine dust in air by using beta rays, and can simultaneously extract samples for analyzing components such as heavy metals. The fine dust automatic measuring device comprises: a body including an inlet disposed in the upper side thereof to feed a particular flow rate of air including fine dust, including an outlet disposed in the lower side thereof to discharge air having fine dust removed therefrom, and including a flow path for flowing air; a collecting filter sheet disposed in the flow path, and collecting fine dust included in flowing air; a beta ray irradiating unit disposed in the upper side of the collecting filter sheet in the flow path to be separated at particular distance therefrom, and irradiating beta rays toward the collecting filter sheet; and a beta ray detecting unit dispose din the lower side of the collecting filter sheet in the flow path, and detecting beta rays penetrating through the collecting filter sheet.

In view of the shortcomings in the prior art, an objective of the present disclosure is to provide a portable on-line in-situ β-ray monitor and a monitoring method as set out in the appended set of claims.

In order to achieve the above objective, the present disclosure provides the following technical solution:.

A portable on-line in-situ β-ray monitor and a monitoring method include a detection mechanism and a control mechanism electrically connected to each other. The detection mechanism includes a filter tape feed device, a filter tape pressing device, a detector, and a gas guide device. The gas guide device is arranged in the filter tape pressing device in a penetrating manner to guide a gas to be tested on the test filter tape. The filter tape pressing device is arranged right above the detector and is configured for pressing the test filter tape. The detector is configured for counting. The control mechanism includes a first detector and a second detector. The filter tape pressing device is connected to the first detector. The filter tape feed device is connected to the second detector. The filter tape feed device is configured for storing and moving test filter tape. The first detector is configured for detecting a down-pressing situation of the filter tape pressing device and the second detector is configured for detecting a filter tape feeding in-place situation.

The filter tape pressing device includes a head pressing block and a filter tape pressing holder. A head pressing disc is fixedly arranged outside the head pressing block in a sleeving manner. An upper end of the head pressing disc is fixedly connected to the filter tape pressing holder through a spring.

A lower end of the head pressing block is connected to a head pressing membrane. An upper end of the pressing head block is connected to a head pressing gas pipe. The bottom of the pressing head gas pipe is fixed to an upper end of the filter tape pressing holder through a head pressing seat.

In the present disclosure, optionally, a gas guide chamber is formed in the head pressing block. An end cover is fixed to the bottom of the head pressing block and forms a gas outlet at the bottom of the head pressing block. The gas guide device is fixed to the inner side of the end cover. The gas guide device and the gas outlet are arranged coaxially.

In the present disclosure, optionally, the detector includes a detecting frame. A head pressing plate is fixed to the top of the detecting frame. A detecting hole is formed at a position, fixedly position where the head pressing plate is fixedly connected to the detecting frame. A detector is fixed coaxially to a lower end of the detecting hole.

In the present disclosure, optionally, the control mechanism includes a main control configured to realize overall control of the monitor. The main control panel is connected to a drive group through a relay and the main control panel controls the gas pump to work through the relay. The drive group comprises a filter tape drive motor, a flow rate control motor, and a filter tape pressing drive motor. The filter tape feed device comprises a primary filter tape belt pulley, a secondary filter tape belt pulley, and two limiting wheels, the primary filter tape belt pulley is connected to a filter tape drive motor; and the filter tape drive motor drives the primary filter tape belt pulley to rotate to feed filter tape. The flow rate control motor controls the overall gas inlet amount of the monitor. The main control panel controls the flow rate control motor to work through the relay so as to drive a regulating valve to work. The filter tape pressing drive motor is fixed to a mounting plate through a filter tape pressing motor frame and the filter tape pressing drive motor works so that the pressing block of the filter tape pressing device performs an operation of pressing the filter tape or lifting up the filter tape. An output shaft of the filter tape pressing drive motor is connected to a cam, a side of the cam is connected to the head pressing disc and the cam rotates under the driving of the filter tape pressing drive motor.

In the present disclosure, optionally, the output shaft of the filter tape pressing drive motor is also fixedly connected to the cam through the first detector.

In the present disclosure, optionally, a mounting plate is fixed between the detecting mechanism and the control mechanism. A connecting hole is formed in the position, corresponding to the gas outlet of the detecting frame, of the mounting plate. The connecting hole is connected to a gas guide pipe. The other end of the gas guide pipe is connected to a flow regulating device. The flow regulating device includes a flowmeter. The flowmeter is connected between the connecting hole and the regulating valve through the gas guide pipe, and the other end of the regulating valve is connected to a gas pump.

In the present disclosure, optionally, the mounting plate is fixedly arranged in the middle of a box body. A collecting mechanism is fixedly arranged on the box body.

A portable on-line in-situ β-ray monitoring method includes the following steps:.

Compared with the prior art, the present disclosure has the following beneficial effects.

According to the device of the present disclosure, ambient dust collection and detection are set in the same channel, which avoids an error caused by feeding filter tape for a plurality of times. Meanwhile, the filter tape pressing device is connected to the first detector. The head pressing block is also connected to the filter tape pressing drive motor through the cam, so that the head pressing block can be pressed down or lifted up very well, and the sealing property during filter tape pressing and smooth filter tape feeding after lifting up the head pressing block can be ensured. Meanwhile, the flow regulating device is also arranged, and constant flow sampling is realized by the control mechanism, which further ensures the measurement accuracy. In addition, the mounting plate is arranged reasonably, and is mounted surface by surface according to functions, which ensures the performance, meanwhile, saves the space, reduces the size, and is portable.

Reference signs in the drawings: <NUM>-filter tape feed device, <NUM>-primary filter tape belt pulley, <NUM>-secondary filter tape belt pulley, <NUM>-secondary filter tape belt pulley mounting frame, and <NUM>-two limiting wheels;.

Technical solutions in the embodiments of the present disclosure will be clearly and completely described herein below with reference to the drawings in the embodiments of the present disclosure. Apparently, the described embodiments are merely part rather than all of the embodiments of the present disclosure. On the basis of the embodiments of the present disclosure, all other embodiments obtained by those of ordinary skill in the art without creative work fall within the scope of protection of the present disclosure.

It is to be noted that when a component is described as being "fixed" to another component, it may be directly on the other component, or there may be a component therebetween. When a component is regarded as being "connected" to the other component, it may be directly connected to the other component, or there may be a component therebetween. When a component is regarded as being "arranged" on the other component, it may be directly arranged on the other component, or there may be a component therebetween. The terms "vertical", "horizontal", "left", "right", and similar expressions used herein are merely for the purpose of illustration.

Unless otherwise defined, all technical and scientific terms used herein shall have the same meanings as commonly understood by those skilled in the art to which this present disclosure belongs. The terms used herein in the specification of the present disclosure are only used to describe specific embodiments, and are not intended to limit the present disclosure. The term "and/or" used herein includes any and all combinations of one or more of the associated listed items.

Referring to <FIG> at the same time, a preferred implementation manner of the present disclosure provides a portable on-line in-situ β-ray monitor, which mainly determines the concentration of ambient dust by measuring the adsorbed radiation quantity of the ambient dust in the atmosphere by using a β-ray absorption principle. Ambient dust collection and detection are set in the same channel, which avoids an error caused by feeding filter tape for a plurality of times. An in-place detection device is arranged on each of a filter tape feed device <NUM> and a filter tape pressing device <NUM>, so as to ensure the accuracy of filter tape feeding and filter tape pressing and avoid an error. A flow regulating device is also arranged to perform constant flow sampling, which ensures the measurement accuracy. The monitor mainly includes a detecting mechanism and a control mechanism electrically connected to each other. The control mechanism controls the detecting mechanism to detect. The detection mechanism and the control mechanism are respectively fixed to a front surface and a back surface of a mounting plate <NUM>. The detecting mechanism includes the filter tape feed device <NUM>, the filter tape pressing device <NUM>, a detector <NUM>, and a gas guide device <NUM>. The gas guide device <NUM> is arranged in the filter tape pressing device <NUM> in a penetrating manner. The filter tape pressing device <NUM> is arranged right above the detector <NUM>. The control mechanism includes a first detector <NUM> and a second detector <NUM>. The filter tape pressing device <NUM> is connected to the first detector <NUM>. The filter tape feed device <NUM> is connected to the second detector <NUM>.

Specifically, the filter tape feed device <NUM> is fixed below the mounting plate <NUM>. The filter tape feed device <NUM> is used for storing and moving test filter tape. A second detector <NUM> connected to the filter tape feed device <NUM> is mainly used for detecting a filter tape feeding in-place situation. The filter tape pressing device <NUM> is used for pressing the test filter tape. The first detector <NUM> is used for detecting a down-pressing situation of the filter tape pressing device <NUM>. The gas guide device <NUM> is arranged in the filter tape pressing device <NUM> to guide a gas to be tested on the test filter tape. The detector <NUM> is fixed right below the filter tape pressing device <NUM>, and is used for collecting particulate matters in the ambient dust on the test filter tape. The whole process is controlled by a control device to automatically realize filter tape feeding, filter tape pressing, gas introducing, and collecting, and the concentration of ambient dust in the atmosphere is obtained through the processing of the control mechanism. The filter tape pressing device <NUM> and the detector <NUM> are arranged coaxially, so that the collecting can be completed by feeding filter tape once. In addition, the first detector <NUM> and the second detector <NUM> detect the situations of the filter tape pressing device <NUM> and the filter tape feed device <NUM> in real time, and sends the situations to the control mechanism, which avoids errors caused by excessive or too little filter tape feeding or not pressing down or lifting up the filter tape pressing device <NUM> during the process. The whole process is controllable and can be performed smoothly. Meanwhile, the test filter tape is tightly pressed through the filter tape pressing device <NUM>, which avoids inaccuracy of the collected data caused by the diffusion of the gas to be tested.

Referring to <FIG> and <FIG>, in the present embodiment, the filter tape pressing device <NUM> includes a head pressing block <NUM> and a filter tape pressing holder <NUM>. The filter tape pressing holder <NUM> is fixed to the mounting plate <NUM>. A head pressing disc <NUM> is arranged outside the head pressing block <NUM> in a sleeving manner. An upper end of the head pressing disc <NUM> is fixedly connected to the filter tape pressing holder <NUM> through a spring. A lower end of the head pressing block <NUM> is connected to a head pressing membrane <NUM>. An upper end of the head pressing block is connected to a head pressing gas pipe <NUM>. The bottom of the pressing head gas pipe <NUM> is fixed to an upper end of the filter tape pressing holder <NUM> through a head pressing seat. A gas guide chamber <NUM> is formed in the head pressing block <NUM>. An end cover <NUM> is fixed to the position, where a gas outlet <NUM> is formed, at the bottom of the head pressing block <NUM>. The gas guide device <NUM> is fixed to the inner side of the end cover <NUM>. The gas guide device <NUM> and the gas outlet <NUM> are arranged coaxially.

Specifically, the filter tape pressing holder <NUM> is fixed to the middle of the mounting plate <NUM>. The head pressing block <NUM> is arranged in the filter tape pressing holder <NUM> in a penetrating manner. The head pressing disc <NUM> is fixed to the outer side of the part, located in the filter tape pressing holder <NUM>, of the head pressing block <NUM>. An upper end of the head pressing disc <NUM> is fixedly connected to the filter tape pressing holder <NUM> through the spring, so that the head pressing block <NUM> is driven to move up and down for a certain distance by the head pressing disc <NUM> under the driving of an external force, thereby facilitating the movement of the test filter tape below the head pressing block <NUM>. A gas guide chamber <NUM> is formed in the head pressing block <NUM>. The gas to be tested enters the gas guide chamber <NUM> through the pressing head gas pipe <NUM> connected above, comes out from the gas outlet <NUM> after passing through the gas guide device <NUM> in the gas guide chamber <NUM>, reaches filter tape to be tested below, and passes through the filter tape to be tested to remain particulate matters on the filter tape to be tested.

Referring to <FIG>, further, the gas guide device <NUM> includes a first gas guide component <NUM> and a second gas guide component <NUM>. The first gas guide component <NUM> is in an inverted conical shape, and the second gas guide component <NUM> is in a semicircular shape. A connecting edge is fixed to the outer sides of the first gas guide component <NUM> and the second gas guide component <NUM>. A diversion port <NUM> is formed in the inner side of the connecting edge, and is used for the circulating of the gas to be tested. Such arrangement has strong guidance to the gas to be tested, so that all gas can be collected to the gas outlet <NUM>. A placement chamber <NUM> is formed in the first gas guide component <NUM> and the second gas guide component <NUM>. A β-ray emitter is placed in the placement chamber <NUM>. The β-ray emitter directly faces the gas outlet <NUM> below. After the collecting of the filter tape to be tested is completed, a beam emitted by the β-ray emitter is received by the detector <NUM> below after passing through the filter tape to be tested, and is transmitted to the control mechanism, so as to complete the collecting of data.

In the present embodiment, the detector <NUM> includes a detecting frame <NUM>. The detecting frame <NUM> is fixed to the mounting plate <NUM>. A head pressing plate <NUM> is fixed to the top of the detecting frame <NUM>. A detecting hole <NUM> is formed in a position where the head pressing plate <NUM> is fixedly connected to the detecting frame <NUM>. A detector <NUM> is fixed coaxially to a lower end of the detecting hole <NUM>.

Specifically, the filter tape feed device <NUM> includes a primary filter tape belt pulley <NUM>, a secondary filter tape belt pulley <NUM>, and two limiting wheels <NUM>. The primary filter tape belt pulley <NUM> is connected to a filter tape drive motor <NUM>. The limiting wheel <NUM> close to the primary filter tape belt pulley <NUM> is connected to the second detector <NUM>. The second detector <NUM> includes a second limiting piece <NUM> and a second limit switch <NUM>. The second limiting piece <NUM> and the second limit switch <NUM> are fixedly arranged on a back surface of the mounting plate <NUM>, correspond to the limiting wheels <NUM>, and are used for detecting a rotating angle of the limiting wheels <NUM> so as to confirm a filter tape feeding situation. The primary filter tape belt pulley <NUM> and the secondary filter tape belt pulley <NUM> are respectively arranged on two sides of the detector <NUM>. The filter tape to be tested is connected from the primary filter tape belt pulley <NUM> into the secondary filter tape belt pulley <NUM> after passing through the first limiting wheel <NUM>, the head pressing plate <NUM>, and the second limiting wheel <NUM>. The primary filter tape belt pulley <NUM> rotates under the driving of the filter tape drive motor <NUM>, so as to drive the filter tape to be tested to move. After the moving is completed, the head pressing block <NUM> is pressed down to be in contact with the head pressing plate <NUM>, so as to fix the filter tape to be tested, and then collecting is performed. After the collecting is performed for <NUM> to <NUM> minutes, the detector <NUM> performs counting to complete the collecting of atmosphere particulate matter data, and the atmosphere particulate matter data is transmitted to the control mechanism.

In the present embodiment, the control mechanism includes a main control panel <NUM>. The main control panel <NUM> realizes overall control of the system. The main control panel <NUM> is connected to a drive group through a relay <NUM>. The drive group includes the filter tape drive motor <NUM>, a flow rate control motor <NUM>, and a filter tape pressing drive motor <NUM>. The filter tape pressing drive motor <NUM> is fixed to the mounting plate <NUM> through a filter tape pressing motor frame <NUM>, and corresponds to the head pressing block <NUM>.

Specifically, both the first detector <NUM> and the second detector <NUM> are connected to the main control panel <NUM>. The collected signal is transmitted to the main control panel <NUM>. The main control panel <NUM> determines whether to perform a next operation instruction according to an input signal. When the next instruction needs to be performed, the main control panel <NUM> sends a signal to the relay <NUM>, so that the corresponding relay <NUM> is sucked to enable the drive group connected to the relay <NUM> to work, i.e., the filter tape drive motor <NUM> drives the primary filter tape belt pulley <NUM> to rotate to feed filter tape, or the flow rate control motor <NUM> control the overall gas inlet amount of the system, or the filter tape pressing drive motor <NUM> works, so that the filter tape pressing device <NUM> performs an operation of pressing the filter tape or lifting up the filter tape.

Referring to <FIG>, in the present embodiment, an output shaft of the filter tape pressing drive motor <NUM> is fixedly to a cam <NUM> through the first detector <NUM>.

Specifically, an output shaft of the filter tape pressing drive motor <NUM> is connected to the cam <NUM>. A side of the cam <NUM> is connected to the head pressing disc <NUM>. The cam <NUM> rotates under the driving of the filter tape pressing drive motor <NUM>. When a convex edge of the cam rotates to be in contact with the head pressing disc <NUM>, the head pressing disc <NUM> is jacked up, so that the head pressing block <NUM> moves upward to be separated from the test filter tape, thereby facilitating the movement of the test filter tape. When the cam <NUM> rotates to the other side, the head pressing disc <NUM> moves downward under the action of the spring, so that the head pressing block <NUM> is pressed down to be in contact with the test filter tape, thereby performing collecting work. The first detector <NUM> includes a first head pressing limiting piece <NUM>, and a first limit switch <NUM> is fixed next to the filter tape pressing drive motor <NUM>. The first head pressing limiting piece <NUM> is matched with the first limit switch <NUM> to detect an output rotating angle of the filter tape pressing drive motor <NUM>, which ensures that a rotating direction of the cam <NUM> in place, thereby ensuring that the head pressing block <NUM> is pressed down or lifted up in place.

In the present embodiment, a connecting hole <NUM> is formed in the position, corresponding to the gas outlet of the detecting frame <NUM>, of the mounting plate <NUM>. The connecting hole <NUM> is connected to a gas guide pipe. The other end of the gas guide pipe is connected to a flow regulating device. The flow regulating device includes a flowmeter <NUM>. The flowmeter <NUM> is connected between the connecting hole <NUM> and the regulating valve <NUM> through the gas guide pipe, and the other end of the regulating valve <NUM> is connected to a gas pump <NUM>.

Specifically, the gas pump <NUM>, the flow rate control motor <NUM>, and the flowmeter <NUM> are all connected to the main control panel <NUM>. During collecting, the main control panel <NUM> controls the gas pump <NUM> to work through the relay <NUM>, so as to pump the gas to be tested into the monitor. The gas is exhausted through the gas pump <NUM> after passing through the head pressing gas pipe <NUM>, the head pressing block <NUM>, the gas outlet <NUM>, the filter tape to be tested, the head pressing plate <NUM>, the detecting frame <NUM>, the connecting hole <NUM>, the gas guide pipe, the flowmeter <NUM>, and the regulating valve <NUM> in sequence. The flowmeter <NUM> detects gas flow, and sends a detected signal to the main control panel <NUM>. When the gas flow is greater than or equal to a set value, the main control panel <NUM> controls the flow rate control motor <NUM> to work through the relay <NUM>, so as to drive the regulating valve <NUM> to work to control the gas flow to be kept in a constant interval, thereby ensuring the measurement accuracy.

In the present implementation mode, the mounting plate <NUM> is fixedly arranged in the middle of a box body, and a collecting mechanism is fixedly arranged on the box body.

Specifically, the mounting plate <NUM> is fixed to the middle of a box body. The detecting mechanism and the control mechanism are respectively fixed to a front surface and a back surface of the mounting plate <NUM>. The detecting mechanism is on the front surface of the mounting plate <NUM>, and the control mechanism is on the back surface of the mounting plate <NUM>. Output ends of the filter tape drive motor <NUM> and the filter tape pressing drive motor <NUM> penetrate through the mounting plate <NUM> to connect the corresponding primary filter tape belt pulley <NUM> and the cam <NUM>. A display fixing frame <NUM> is also fixed to the outer side of the filter tape pressing device <NUM> on the front surface of the mounting plate <NUM>, and is mainly used for fixedly mounting a display panel. The display panel is connected to the main control panel <NUM>, and is used for displaying collected data and the like, which is convenient for personnel to view on site. The collecting mechanism includes a temperature and humidity collector <NUM>, a wind speed collector <NUM>, and a wind direction collector <NUM>. The collecting mechanism is connected to the main control panel <NUM>, and sends to the collected data to the main control panel <NUM>.

As shown in <FIG> and <FIG>, further, in order to fully utilize the space and reduce the overall size of a detecting instrument, the display panel, the detector <NUM>, and the filter tape feed device <NUM> are mounted on the front surface of the mounting plate <NUM> in sequence from top to bottom. The filter tape pressing device <NUM> is fixed below the display panel. The flow rate control motor <NUM>, the filter tape pressing drive motor <NUM>, the flowmeter <NUM>, and a power supply <NUM> are fixed to the back surface of the mounting plate <NUM> in sequence from top to bottom and from left to right. The regulating valve <NUM> is connected below the flow rate control motor <NUM>. The connecting hole <NUM> is formed below the filter tape pressing drive motor <NUM>. The second detector <NUM> is fixed below the power supply <NUM>. A secondary filter tape belt pulley mounting frame <NUM> is fixed below the regulating valve <NUM>. The main control panel <NUM> is fixed below the connecting hole <NUM>. The filter tape drive motor <NUM> is fixed to the right side of the main control panel <NUM>. The relay <NUM> is fixed to the right side of the filter tape drive motor <NUM>.

Another preferred implementation manner of the present disclosure provides a monitoring method of a portable on-line in-situ β-ray monitor, including the following steps:.

Claim 1:
A portable on-line in-situ β-ray monitor, comprising a detection mechanism and a control mechanism electrically connected to each other, wherein the detection mechanism comprises a filter tape feed device (<NUM>), a filter tape pressing device (<NUM>), a detector (<NUM>), and a gas guide device (<NUM>); the gas guide device (<NUM>) is arranged in the filter tape pressing device (<NUM>) in a penetrating manner to guide a gas to be tested on the test filter tape; the filter tape pressing device (<NUM>) is arranged right above the detector (<NUM>) and is configured for pressing the test filter tape; the detector (<NUM>) is configured for counting; the control mechanism comprises a first detector (<NUM>) and a second detector (<NUM>); the filter tape pressing device (<NUM>) is connected to the first detector (<NUM>); and the filter tape feed device (<NUM>) is connected to the second detector (<NUM>), the filter tape feed device (<NUM>) is configured for storing and moving test filter tape; the first detector (<NUM>) is configured for detecting a down-pressing situation of the filter tape pressing device (<NUM>) and the second detector (<NUM>) is configured for detecting a filter tape feeding in-place situation;
the monitor being characterized in that:
the filter tape pressing device (<NUM>) comprises a head pressing block (<NUM>) and a filter tape pressing holder (<NUM>); a head pressing disc (<NUM>) is fixedly arranged outside the head pressing block (<NUM>) in a sleeving manner; and an upper end of the head pressing disc (<NUM>) is fixedly connected to the filter tape pressing holder (<NUM>) through a spring; and
a lower end of the head pressing block (<NUM>) is connected to a head pressing membrane (<NUM>); an upper end of the pressing head block (<NUM>) is connected to a head pressing gas pipe (<NUM>); and the bottom of the pressing head gas pipe (<NUM>) is fixed to an upper end of the filter tape pressing holder (<NUM>) through a head pressing seat.