Online burst bead filter rod quality detection device, method and computer readable storage medium

Abstract

The present invention discloses an online bead filter rod quality detection device, method and computer readable storage medium, wherein the online bead filter rod quality detection method comprises: using a microwave source to provide a microwave signal to a microwave resonant cavity; the microwave resonant cavity detects the bead filter rod located in its detection channel and outputs a microwave response signal; receiving the microwave response signal in real time and converting the microwave response signal into a voltage signal; establishing a characteristic curve according to the voltage signal and the corresponding receiving time of the voltage signal; judging the quality of the bead filter rod according to the peak of the characteristic curve. The detection method is simple and has high accuracy.

Description

Technical Field

[0001] The present invention relates to the technical field of tobacco processing, and in particular to an online bead-bursting filter rod quality detection device, method and computer-readable storage medium. Background Art

[0002] With the innovation and development of tobacco products, popping beads have been widely accepted by the market as a new flavoring product. Before lighting the cigarette, the smoker directly squeezes the filter rod to break the popping beads, thereby releasing the fluid and exerting the fluid aroma. In order to ensure this, the long-term quality of the cigarette product must be guaranteed. Therefore, when the cigarette is sold, it must be ensured that the popping beads are fully filled and well positioned in the corresponding position of the filter.

[0003] Patent CN105866140A discloses a method for determining the characteristics of popping beads. This method measures the density of the popping bead filter rod and inspects the quality of the popping bead filter rod by the characteristics of the density change along the axial direction of the filter rod. This method belongs to the microwave indirect measurement method. With the diversification of popping bead products, the density between the popping bead products and the filter rod tow is getting closer and closer. This method can no longer meet the needs of inspecting multi-specification popping bead products. At the same time, this method needs to calculate the density first, and then inspect the quality of the filter rod based on the density. The detection speed is far from meeting the requirements of online detection.

[0004] Patent CN109738462A discloses a device for detecting burst bead filter rods using microwaves. The device uses a transmitting device and a receiving device to make the filter rod to be detected pass through a microwave sensor, thereby realizing the quality inspection of the burst bead filter rod. During the detection process of the device, the movement of the filter rod exists in a natural motion state for a period of time. Due to factors such as friction, it cannot meet the absolute uniform speed of the movement process, thus causing measurement errors of the burst bead position. At the same time, the device is an offline detection device with a detection time lag. When batch quality problems occur, it will cause a large amount of product waste.

[0005] Therefore, a reliable and effective method for testing the quality of online bead filter rods is urgently needed. Summary of the invention

[0006] The purpose of the present invention is to solve the problem in the prior art that the quality of online burst bead filter rods cannot be effectively and accurately detected and inspected.

[0007] Based on this, an embodiment of the present invention discloses an online bead filter rod quality detection method, which can realize effective and accurate detection of the quality of online bead filter rods. The method comprises:

[0008] Providing a microwave signal to the microwave resonant cavity using a microwave source;

[0009] The microwave resonant cavity detects the burst bead filter rod located in its detection channel and outputs a microwave response signal;

[0010] Receive microwave response signals in real time and convert the microwave response signals into voltage signals;

[0011] Establishing a characteristic curve according to the voltage signal and the receiving time corresponding to the voltage signal;

[0012] The quality of the burst bead filter rod can be judged according to the peak of the characteristic curve.

[0013] By adopting the above technical solution, the microwave resonance cavity is used to detect the burst bead filter rod, and the microwave response signal after detection is converted into a voltage signal, and a characteristic curve is established according to the voltage signal. Since the materials of the burst bead and other parts of the filter rod are different, they can be identified through the converted voltage signal, and the relevant information of the peak of the characteristic curve characterizes the relevant situation of the burst bead in the filter rod, so that it can be judged whether there is a quality problem of the burst bead in the burst bead filter rod according to the peak of the characteristic curve. When there is a problem with the burst bead, it indicates that the burst bead filter rod at this time is unqualified. This detection method is simple and has high accuracy.

[0014] According to another specific embodiment of the present invention, the characteristic curve is a distance-voltage characteristic curve that characterizes the change of the voltage signal with the distance of the burst bead in the filter rod; judging the quality of the burst bead filter rod according to the peak of the characteristic curve includes:

[0015] Obtaining the number of peaks of the distance-voltage characteristic curve, and comparing the number of peaks with a preset value to determine whether the number of burst beads in the burst bead filter rod is qualified; and / or,

[0016] Obtaining the distance point information corresponding to each peak of the distance-voltage characteristic curve, for each peak, obtaining the implantation position of the bursting bead corresponding to the peak according to the distance point information of the peak, and judging whether the implantation position of the bursting bead is accurate; and / or,

[0017] Obtain the distance points corresponding to each peak of the distance-voltage characteristic curve, for each peak, select an interval containing the distance point near the distance point corresponding to the peak, integrate the voltage signal in the interval to obtain the capacity coefficient corresponding to the peak, and judge whether the capacity of the burst bead corresponding to the peak is qualified according to the capacity coefficient; and / or,

[0018] The peak value of each crest of the distance-voltage characteristic curve is obtained. For each crest, the ratio of the crest value to the width of the bursting bead is calculated to obtain the deformation coefficient of the crest, and whether the bursting bead is damaged is determined based on the deformation coefficient.

[0019] According to another specific embodiment of the present invention, the operating frequency of the microwave source is located at the rising or falling edge region of the microwave resonance cavity transmission curve, and the operating frequency of the microwave source is constant during the detection process.

[0020] According to another specific embodiment of the present invention, the operating frequency of the microwave source is the frequency corresponding to the half-power point of the microwave resonant cavity transmission curve.

[0021] According to another specific embodiment of the present invention, the operating frequency of the microwave source is 1 to 10 GHz.

[0022] According to another specific embodiment of the present invention, before establishing a characteristic curve according to the voltage signal and the receiving time corresponding to the voltage signal, after receiving the microwave response signal in real time and converting the microwave response signal into a voltage signal, it also includes:

[0023] The voltage signal received in real time and the receiving time corresponding to the voltage signal are cached.

[0024] Accordingly, the present invention also provides an online bead filter rod quality detection device, comprising:

[0025] A microwave resonant cavity is provided with a feeding antenna, a decoupling antenna and a detection channel for accommodating a bursting bead filter rod;

[0026] A microwave source, connected to the feeding antenna, for sending a microwave signal to the microwave resonant cavity through the feeding antenna;

[0027] A voltage signal converter is connected to the decoupling antenna and is used for converting the microwave response signal into a voltage signal for output;

[0028] The processing device is connected to the voltage signal converter and is used to establish a characteristic curve according to the voltage signal and the receiving time corresponding to the voltage signal, and judge the quality of the burst bead filter rod according to the peak of the characteristic curve.

[0029] According to another specific embodiment of the present invention, the device further includes: a data buffer connected to the voltage signal converter, used to receive the voltage signal output by the voltage signal converter in real time, and cache the received voltage signal and the receiving time corresponding to the voltage signal;

[0030] The processing device is connected to the data buffer and is used to retrieve the voltage signal and the receiving time corresponding to the voltage signal in the data buffer, and establish a characteristic curve according to the voltage signal and the receiving time.

[0031] According to another specific embodiment of the present invention, the characteristic curve is a distance-voltage characteristic curve that characterizes the change of the voltage signal with the distance of the burst bead in the filter rod. Judging whether the burst bead filter rod is qualified according to the characteristic curve includes:

[0032] Obtaining the number of peaks of the distance-voltage characteristic curve, and comparing the number of peaks with a preset value to determine whether the number of burst beads in the burst bead filter rod is qualified; and / or,

[0033] Obtaining the distance point information corresponding to each peak of the distance-voltage characteristic curve, for each peak, obtaining the implantation position of the bursting bead corresponding to the peak according to the distance point information of the peak, and judging whether the implantation position of the bursting bead is accurate; and / or,

[0034] Obtain the distance points corresponding to each peak of the distance-voltage characteristic curve, for each peak, select an interval containing the distance point near the distance point corresponding to the peak, integrate the voltage signal in the interval to obtain the capacity coefficient corresponding to the peak, and judge whether the capacity of the burst bead corresponding to the peak is qualified according to the capacity coefficient; and / or,

[0035] The peak value of each crest of the distance-voltage characteristic curve is obtained. For each crest, the ratio of the crest value to the width of the bursting bead is calculated to obtain the deformation coefficient of the crest, and whether the bursting bead is damaged is determined based on the deformation coefficient.

[0036] According to another specific embodiment of the present invention, the device also includes a controller and a rejection mechanism, and the controller is connected to the rejection mechanism and the processing equipment respectively. When the processing equipment determines that the burst bead filter rod is unqualified, a rejection signal is sent to the controller, and the controller controls the operation of the rejection mechanism according to the rejection signal.

[0037] According to another specific embodiment of the present invention, the microwave source is further connected to a controller, and the controller is further used to control the microwave source to send a microwave signal to the microwave resonant cavity.

[0038] According to another specific embodiment of the present invention, the device further includes:

[0039] The cutter sensor is connected to the controller. When the filter rod cutter moves to a specified position, the cutter sensor sends a trigger signal to the controller.

[0040] The controller controls the microwave source to send a microwave signal to the microwave resonant cavity according to the trigger signal.

[0041] According to another specific embodiment of the present invention, the operating frequency of the microwave source is located at the rising or falling edge region of the microwave resonance cavity transmission curve, and the operating frequency of the microwave source is constant during the detection process.

[0042] According to another specific embodiment of the present invention, the operating frequency of the microwave source is the frequency corresponding to the half-power point of the microwave resonant cavity transmission curve.

[0043] According to another specific embodiment of the present invention, the operating frequency of the microwave source is 1 to 10 GHz.

[0044] According to another specific embodiment of the present invention, the microwave resonant cavity comprises:

[0045] A cavity body having an inner chamber configured as a resonant cavity;

[0046] The first cavity conduit and the second cavity conduit are respectively arranged on both sides of the cavity along the first direction, and the first cavity conduit and the second cavity conduit both have cavities connected to the inner chamber; the cavity side wall of the first cavity conduit and / or the cavity side wall of the second cavity conduit are provided with adjustment holes and slide grooves;

[0047] An adjusting rod is arranged in the adjusting hole;

[0048] A slip ring is disposed in the inner chamber;

[0049] The push block is at least partially arranged in the slide groove. The push block is connected to the adjustment rod and the slip ring respectively. The adjustment rod can move in the adjustment hole. When the adjustment rod moves, the adjustment rod drives the slip ring to move along the first direction in the inner chamber through the push block.

[0050] According to another specific embodiment of the present invention, the microwave resonant cavity further comprises a protective sleeve, which passes through the cavity of the first cavity conduit, the inner chamber and the cavity of the second cavity conduit in sequence;

[0051] The slide groove is communicated with the cavity in the cavity conduit where it is located. The pushing block includes a pushing part and a connecting part. The connecting part is arranged in the slide groove and connected to the adjusting rod. The pushing part is a circular ring, and the end face of the circular ring is connected to the end face of the slip ring. The slip ring and the pushing part are both sleeved on the protective sleeve.

[0052] Correspondingly, an embodiment of the present invention further discloses a computer-readable storage medium, on which instructions are stored, and when the instructions are executed on a computer, the computer executes the above method. BRIEF DESCRIPTION OF THE DRAWINGS

[0053] Figure 1 A flow chart showing the on-line bead-bursting filter rod quality detection method of the present invention;

[0054] Figure 2 This is a schematic diagram of a distance-voltage measurement curve of a single filter rod product of Example 1;

[0055] Figure 3 This is a schematic diagram of a distance-voltage measurement curve of a single filter rod product of Example 2;

[0056] Figure 4 This is a schematic diagram of a distance-voltage measurement curve of a single filter rod product of Example 3;

[0057] Figure 5 This is a schematic diagram of a distance-voltage measurement curve of a single filter rod product of Example 4;

[0058] Figure 6 This is a schematic diagram of a distance-voltage measurement curve of a single filter rod product of Example 5;

[0059] Figure 7 The structural block diagram of the online burst bead filter rod quality detection device of the present invention is shown;

[0060] Figure 8 A cross-sectional schematic diagram showing a microwave resonant cavity of the present invention;

[0061] Fig. 9 Show Figure 8 A partial enlarged view of part A;

[0062] Fig.10 A schematic diagram showing an electronic device according to an embodiment of the present invention;

[0063] Fig.11 A schematic diagram showing a system on chip according to an embodiment of the present invention. DETAILED DESCRIPTION

[0064] The following specific embodiments illustrate the implementation of the present invention, and those skilled in the art can easily understand other advantages and effects of the present invention from the contents disclosed in this specification. Although the description of the present invention will be introduced in conjunction with the preferred embodiment, this does not mean that the features of this invention are limited to this implementation. On the contrary, the purpose of introducing the invention in conjunction with the implementation is to cover other options or modifications that may extend based on the claims of the present invention. In order to provide a deep understanding of the present invention, the following description will include many specific details. The present invention can also be implemented without using these details. In addition, in order to avoid confusion or blurring the focus of the present invention, some specific details will be omitted in the description. It should be noted that the embodiments of the present invention and the features in the embodiments can be combined with each other without conflict.

[0065] It should be noted that in this specification, similar reference numerals and letters denote similar items in the following drawings, and therefore, once an item is defined in one drawing, it does not need to be further defined and explained in the subsequent drawings.

[0066] In the description of this embodiment, it should be noted that the terms “first”, “second”, etc. are only used to distinguish the description and cannot be understood as indicating or implying relative importance.

[0067] In the description of this embodiment, it is also necessary to explain that, unless otherwise clearly specified and limited, the terms "set" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in this embodiment can be understood according to specific circumstances.

[0068] In order to make the objectives, technical solutions and advantages of the present invention more clear, the embodiments of the present invention will be further described in detail below with reference to the accompanying drawings.

[0069] refer to Figure 1 The present invention provides an online bead filter rod quality detection method, comprising the following steps:

[0070] Step S1: using a microwave source to provide a microwave signal to the microwave resonant cavity;

[0071] Step S2: The microwave resonant cavity detects the burst bead filter rod in its detection channel and outputs a microwave response signal;

[0072] Step S3: receiving the microwave response signal in real time and converting the microwave response signal into a voltage signal;

[0073] Step S4: establishing a characteristic curve according to the voltage signal and the receiving time corresponding to the voltage signal;

[0074] Step S5: judging the quality of the burst bead filter rod according to the peak of the characteristic curve.

[0075] The present invention detects the burst bead filter rod by using a microwave resonant cavity, converts the microwave response signal after detection into a voltage signal, and establishes a characteristic curve according to the voltage signal. Since the burst bead and other parts of the filter rod are made of different materials, they can be identified by the converted voltage signal. The relevant information of the peak of the characteristic curve characterizes the relevant situation of the burst bead in the filter rod, so it can be judged whether there is a quality problem of the burst bead in the burst bead filter rod according to the peak of the characteristic curve. When there is a problem with the burst bead, it indicates that the burst bead filter rod is unqualified. This detection method is simple and has high accuracy.

[0076] Optionally, the operating frequency of the microwave source is located at an ascending or descending edge region of a microwave resonant cavity transmission curve, and the operating frequency of the microwave source is constant during the detection process.

[0077] By increasing the resonant frequency of the microwave resonant cavity, the response voltage of different media in the microwave electric field is improved, which effectively solves the problem that the characteristics of different types of explosive beads in the microwave field are not obviously different, thereby fundamentally solving the diversified adaptability of the explosive beads.

[0078] Specifically, the transmission curve of the microwave resonant cavity can be measured using a Mach-Zehnder interferometer (MZI). The MZI structure is widely used in the field of optical fiber sensing due to its small size, simple structure, and high sensitivity. Specifically, a static analysis method of the resonant cavity can be established through a transmission line model, and the expression formula and simulation image of the transmission curve can be derived.

[0079] Preferably, the operating frequency of the microwave sensor is the frequency corresponding to the half-power point of the resonant cavity transmission curve. Specifically, the operating frequency of the microwave sensor can be selected from 1 to 10 GHz, and further, it can be preferably between 6 and 7 GHz, which is conducive to improving the sensitivity of the microwave sensor and increasing the characteristic difference between the bursting bead capsule and the filter rod tow. In addition, the single-frequency point measurement method of using a constant operating frequency of the microwave sensor can achieve a very high processing speed to meet the needs of online detection.

[0080] Optionally, the characteristic curve in step S4 is a distance-voltage characteristic curve that characterizes the change of the voltage signal with the distance of the bursting bead in the filter rod.

[0081] Optionally, step S5: judging the quality of the burst bead filter rod according to the peak of the characteristic curve may specifically include:

[0082] The number of peaks of the distance-voltage characteristic curve is obtained, and the number of peaks is compared with a preset value to determine whether the number of burst beads in the burst bead filter rod is qualified.

[0083] That is, by traversing the number of peaks in the distance-voltage characteristic curve, the number of implanted burst beads is obtained, so as to confirm whether there are multiple beads, missing beads or even no beads, and realize accurate inspection of the number of burst beads. In this process, the preset value used for comparing with the number of peaks of the characteristic curve to determine whether the number of burst beads is qualified can be set according to the specific actual situation.

[0084] Optionally, step S5: judging the quality of the burst bead filter rod according to the peak of the characteristic curve may specifically include:

[0085] The distance point information corresponding to each peak of the distance-voltage characteristic curve is obtained. For each peak, the implantation position of the bursting bead corresponding to the peak is obtained according to the distance point information of the peak, and whether the implantation position of the bursting bead is accurate is determined.

[0086] That is, the peak value of the distance-voltage characteristic curve is detected, and the sampling data distance information corresponding to the peak value is recorded to obtain the implantation position of the bursting bead. Specifically, due to the difference in dielectric constant between the bursting bead and the wire bundle, the position corresponding to the bursting bead on the output voltage of the microwave sensor presents a voltage peak. By detecting the sampling data distance information corresponding to the peak value, the implantation position of the bursting bead can be obtained, that is, the position relative to the end face of the filter rod.

[0087] Optionally, step S5: judging the quality of the burst bead filter rod according to the peak of the characteristic curve may specifically include:

[0088] Get the distance points corresponding to each peak of the distance-voltage characteristic curve. For each peak, select an interval containing the distance point near the distance point corresponding to the peak, integrate the voltage signal in the interval to obtain the capacity coefficient corresponding to the peak, and judge whether the capacity of the bursting bead corresponding to the peak is qualified according to the capacity coefficient.

[0089] Specifically, the capacity factor can also be set according to actual conditions. In addition, the selection of the voltage range used to calculate the capacity factor is related to the product characteristics of the bursting beads. Generally, it can be selected to be centered on the peak value, and the positions of the two ends of the horizontal axis when the peak voltage is less than 90% of the peak voltage are the two ends of the interval.

[0090] Optionally, step S5: judging the quality of the burst bead filter rod according to the peak of the characteristic curve may specifically include:

[0091] The peak value of each crest of the distance-voltage characteristic curve is obtained. For each crest, the ratio of the crest value to the width of the bursting bead is calculated to obtain the deformation coefficient of the crest, and whether the bursting bead is damaged is determined based on the deformation coefficient.

[0092] Specifically, the burst width refers to the distance interval corresponding to the burst on the distance-voltage characteristic curve, and can be selected as a distance interval centered on the peak value and having two ends less than 90% of the peak voltage.

[0093] That is, the quality of the bursting bead filter rod can be judged by judging one or more combinations of the number of bursting beads in the filter rod, the implantation position of each bursting bead, the capacity of each bursting bead, and whether each bursting bead is damaged. This method is accurate, effective, and easy to operate.

[0094] Optionally, after step S3 and before step S4, the following may also be included:

[0095] The voltage signal received in real time and the receiving time corresponding to the voltage signal are cached.

[0096] Specifically, after the voltage signal and the receiving time corresponding to the voltage signal are cached, step S4 specifically uses all the cached voltage signals and the receiving time corresponding to each voltage signal to establish a characteristic curve. Specifically, the bursting bead filter rod can be transported to the microwave resonant cavity for detection through a transmission system. Since the transportation speed of the transmission system remains stable and the speed is known, the distance information corresponding to each voltage signal can be determined in turn according to the receiving time of each voltage signal, and then a distance-voltage characteristic curve is established according to the voltage signal and the corresponding distance information, and then subsequent analysis and calculation are performed.

[0097] The online burst bead filter rod quality detection method provided by the present invention utilizes the principle that the burst bead and the filter rod tow medium are different, converts the microwave response signal after detection into a voltage signal, and establishes a characteristic curve to realize burst bead quality detection, simplifies the detection system, and also improves the detection speed. It can simultaneously check the number, phase, missing and damage of burst beads in the filter rod during high-speed production, and effectively improves the product quality in the online production process. In addition, the present invention also improves the response voltage of different media in the microwave electric field by increasing the resonant frequency of the microwave resonant cavity, effectively solving the problem that the characteristic differences of different types of burst beads in the microwave field are not obvious, thereby fundamentally solving the adaptability of the diverse burst beads.

[0098] The specific process of the online bead filter rod quality detection method is described in detail below through several embodiments.

[0099] Embodiment 1

[0100] This embodiment tests the quality of the finished filter rods in the filter rod production process by measuring the quality of the bursting bead capsules embedded in the filter rods.

[0101] When inspecting the quality of the bursting bead filter rod, the operating frequency of the microwave sensor used is located at the rising or falling edge area of ​​the resonant cavity transmission curve, and the operating frequency of the microwave sensor is constant during the inspection. Preferably, the operating frequency of the microwave sensor is the frequency corresponding to the half-power point of the resonant cavity transmission curve. Specifically, the operating frequency of the microwave sensor can be selected as 1 to 10 GHz, and further, it can be preferably between 6 and 7 GHz, which is conducive to improving the sensitivity of the microwave sensor and increasing the characteristic difference between the bursting bead capsule and the filter rod tow. In addition, the single-frequency point measurement method in which the operating frequency of the microwave sensor is constant can achieve a very high processing speed to meet the needs of online detection.

[0102] Specifically, the inspection process includes the following steps:

[0103] The power change of the microwave response signal coupled out of the microwave resonant cavity is converted into the change of the voltage signal.

[0104] The voltage signal is continuously collected, and the voltage signal of a single filter rod is cached, and a distance-voltage characteristic curve is established based on the cached data. Continuously collecting the voltage signal means that the voltage signal is collected uninterruptedly, and specifically, it can also be uninterrupted sampling collection.

[0105] Detect the peak value of the distance-voltage characteristic curve, and record the sampling data distance information corresponding to the peak value to obtain the implantation position of the bursting bead. Specifically, due to the difference in dielectric constant between the bursting bead and the wire bundle, the position corresponding to the bursting bead on the output voltage of the microwave sensor presents a voltage peak. By detecting the sampling data distance information corresponding to the peak value, the implantation position of the bursting bead can be obtained, that is, the position relative to the end face of the filter rod.

[0106] By traversing the number of peaks appearing in the distance-voltage characteristic curve, the number of implanted burst beads can be obtained, and whether there are multiple beads, missing beads or even no beads can be confirmed, and the number of burst beads can be tested.

[0107] Based on the peak position of the distance-voltage characteristic curve, find the capacity interval on both sides of the peak, integrate the voltage signal within the capacity interval, and use the voltage integral as the capacity coefficient. Calculate the ratio of the distance width corresponding to the peak value and the width of the burst bead to obtain the deformation coefficient.

[0108] Figure 2 Schematic diagram of the distance-voltage measurement curve of a single filter rod product of the first embodiment. Figure 2 As shown, in Example 1, the filter rod has a length of 120 mm and contains 4 bursting beads in total, and the distances between the 4 bursting beads and the end face are required to be 15 mm, 45 mm, 75 mm and 105 mm. Figure 2 In the figure, the starting position of the data corresponds to the starting end face of the filter rod, the ending position of the data corresponds to the rear end face of the filter rod, the horizontal axis is the distance along the axial direction of the filter rod, and the vertical axis is the voltage signal sampling value, whose physical meaning is the voltage signal output by the resonant cavity response. Figure 2 The peak value 101 in the graph represents the actual distances between the four burst beads, which are 14.41mm, 44.68mm, 74.84mm and 104.9mm respectively. It can be seen that this detection method achieves a measurement resolution of 0.01mm.

[0109] Embodiment 2

[0110] The second embodiment is based on the inspection method of the first embodiment, and measures a single unqualified filter rod product with a problem in the position of the burst bead. Figure 3 This is a schematic diagram of a distance-voltage measurement curve of a single filter rod product of Example 2. Figure 3 In the figure, the second peak represents the position of the second burst bead. At the second peak, the position of peak 103 is obviously different from the position of peak 102, which means that the position of the second burst bead of the unqualified filter rod is different from the position of the second burst bead of the qualified filter rod, and there is a position problem of the second burst bead of the unqualified filter rod relative to the end face of the filter rod.

[0111] Embodiment 3

[0112] Example 3 is based on the inspection method of Example 1, and measures a single filter rod product that is unqualified and has a problem with the number of burst beads. Figure 4 Schematic diagram of the distance-voltage measurement curve of a single filter rod product of Example 3. Figure 4 As shown, the position of the curve feature 105 is obviously missing relative to the position of the peak 104, and there are only 3 burst beads in the unqualified filter rod.

[0113] Embodiment 4

[0114] Example 4 is based on the inspection method of Example 1, and measures a single unqualified filter rod product with a problem in bursting bead capacity. Figure 5 Schematic diagram of the distance-voltage measurement curve of a single filter rod product of Example 4. Figure 5 In the figure, a capacity interval is located on the left and right sides of the peak values ​​107 and 106, and the voltage signal within the capacity interval is integrated, and the voltage integral obtained is used as the capacity coefficient. It can be seen that within the same capacity interval, the capacity coefficient of the peak value 107 is much lower than that of the peak value 106, and the capacity of the third burst bead in the unqualified filter rod is seriously insufficient. The capacity interval is related to the product characteristics of the burst bead, and can be selected as the peak value as the center, and the positions of the two ends of the horizontal axis when the peak voltage is less than 90% are the two ends of the interval.

[0115] Embodiment 5

[0116] Example 5 is based on the inspection method of Example 1, and measures a single unqualified filter rod product with a burst bead and broken. Figure 6 Schematic diagram of the distance-voltage measurement curve of a single filter rod product in Example 5. Figure 6 As shown, the ratio of the distance width corresponding to the peak value and the width of the burst bead in the curve where the peak value 108 and the curve where the peak value 109 are located is calculated to obtain the deformation coefficient. The distance width can be selected as the peak value as the center and less than 90% of the peak voltage as the two end intervals. Figure 6 In the figure, the first bursting bead in the unqualified filter rod is damaged. Due to the leakage of liquid, the deformation coefficient is greater than that of the bursting bead in the normal filter rod, and the voltage peak of the unqualified filter rod is significantly higher than that of the normal filter rod.

[0117] Accordingly, if Figure 7 As shown, the present invention also provides an online burst bead filter rod quality detection device, which is characterized by comprising:

[0118] The microwave resonant cavity 100 is provided with a feeding antenna, a decoupling antenna and a detection channel for accommodating the bursting bead filter rod;

[0119] A microwave source 200, connected to the feeding antenna, for sending microwave signals to the microwave resonant cavity 100 through the feeding antenna;

[0120] A voltage signal converter 300 is connected to the decoupling antenna and is used to convert the microwave response signal into a voltage signal and then output it;

[0121] The processing device is connected to the voltage signal converter 300, and is used to establish a characteristic curve according to the voltage signal and the receiving time corresponding to the voltage signal, and judge the quality of the burst bead filter rod according to the peak of the characteristic curve.

[0122] Optionally, the online bead filter rod quality detection device further includes: a data buffer, connected to the voltage signal converter 300, for receiving the voltage signal output by the voltage signal converter 300 in real time, and caching the received voltage signal and the receiving time corresponding to the voltage signal;

[0123] The processing device is connected to the data buffer and is used to retrieve the voltage signal and the receiving time corresponding to the voltage signal in the data buffer, and establish a characteristic curve according to the voltage signal and the receiving time.

[0124] Optionally, the characteristic curve is a distance-voltage characteristic curve representing that the voltage signal changes with the distance of the bursting bead in the filter rod, and the processing device determines whether the bursting bead filter rod is qualified according to the characteristic curve, including:

[0125] The processing device obtains the number of peaks of the distance-voltage characteristic curve, and compares the number of peaks with a preset value to determine whether the number of burst beads in the burst bead filter rod is qualified; and / or,

[0126] The processing device obtains the distance point information corresponding to each peak of the distance-voltage characteristic curve, obtains the implantation position of the bursting bead corresponding to each peak according to the distance point information of the peak, and determines whether the implantation position of the bursting bead is accurate; and / or,

[0127] The processing device obtains the distance points corresponding to each peak of the distance-voltage characteristic curve, selects an interval containing the distance point near the distance point corresponding to the peak for each peak, integrates the voltage signal in the interval to obtain the capacity factor corresponding to the peak, and determines whether the capacity of the burst bead corresponding to the peak is qualified according to the capacity factor; and / or,

[0128] The processing equipment obtains the peak value of each peak of the distance-voltage characteristic curve, and for each peak, calculates the ratio of the peak value to the width of the bursting bead to obtain the deformation coefficient of the peak, and determines whether the bursting bead is damaged based on the deformation coefficient.

[0129] That is, the processing equipment can judge whether the quality of the bursting bead filter rod is qualified by judging one or more combinations of the number of bursting beads in the filter rod, the implantation position of each bursting bead, the capacity of each bursting bead, and whether each bursting bead is damaged. The detection process is accurate, effective, and easy to operate.

[0130] Specifically, the operating frequency of the microwave source 200 is located at the rising or falling edge region of the transmission curve of the microwave resonant cavity 100, and the operating frequency of the microwave source 200 is constant during the detection process. Preferably, the operating frequency of the microwave sensor is the frequency corresponding to the half-power point of the resonant cavity transmission curve. Specifically, the operating frequency of the microwave sensor can be selected as 1 to 10 GHz, and further, it can be preferably between 6 and 7 GHz, which is conducive to improving the sensitivity of the microwave sensor and increasing the characteristic difference between the bursting bead capsule and the filter rod tow. In addition, the single-frequency point measurement method in which the operating frequency of the microwave sensor is constant can achieve a very high processing speed to meet the needs of online detection.

[0131] Optionally, the online burst bead filter rod quality inspection device also includes a controller and a rejection mechanism. The controller is connected to the rejection mechanism and the processing equipment respectively. When the processing equipment determines that the burst bead filter rod is unqualified, a rejection signal is sent to the controller. The controller controls the operation of the rejection mechanism according to the rejection signal to reject the unqualified filter rod.

[0132] Optionally, the microwave source 200 is also connected to a controller, and the controller is also used to control the microwave source 200 to send microwave signals to the microwave resonant cavity 100 .

[0133] Optionally, the online burst bead filter rod quality detection device is characterized by further comprising:

[0134] The cutter sensor is connected to the controller. When the filter rod cutter moves to a specified position, the cutter sensor sends a trigger signal to the controller.

[0135] The controller controls the microwave source 200 to send a microwave signal to the microwave resonant cavity 100 according to the trigger signal.

[0136] Alternatively, if Figure 8 and Fig. 9 As shown, the microwave resonant cavity 100 comprises:

[0137] The cavity has an inner chamber 6 configured as a resonant cavity;

[0138] The first cavity conduit 4 and the second cavity conduit 5 are connected along the first direction ( Figure 8 The first cavity conduit 4 and the second cavity conduit 5 both have cavities connected to the inner chamber 6; the cavity sidewalls of the first cavity conduit 4 and / or the cavity sidewalls of the second cavity conduit 5 are provided with adjustment holes 11 and slide grooves 9;

[0139] An adjusting rod 12 is arranged in the adjusting hole 11;

[0140] A slip ring is disposed in the inner chamber 6;

[0141] The pushing block 10 is at least partially disposed in the slide groove 9. The pushing block 10 is respectively connected to the adjusting rod 12 and the slip ring. The adjusting rod 12 can move in the adjusting hole 11. When the adjusting rod 12 moves, the adjusting rod 12 drives the slip ring to move along the first direction in the inner chamber 6 through the pushing block 10.

[0142] On the one hand, by arranging the first cavity conduit 4 and the second cavity conduit 5 on both sides of the cavity in the resonant cavity, the loss of the microwave electric field signal in the cavity in the resonant cavity can be reduced, and the leakage of the microwave signal causing unstable measurement can be avoided. On the other hand, a slip ring located in the inner cavity is arranged on the side wall of at least one of the first cavity conduit 4 and the second cavity conduit 5, so that the width of the electric field entering the measured product inside the inner cavity can be effectively restricted, and the range of action of the electric field of the resonant cavity along the direction of movement can be reduced, thereby improving the measurement resolution along the axial direction, and at least one of the first cavity conduit 4 and the second cavity conduit 5 is also provided with an adjustment rod and a push block matched with the slip ring. When the adjustment rod moves, the slip ring is driven to move in the first direction in the inner cavity through the push block to change the distance between the slip ring and the side wall of the resonant cavity cavity on the opposite side, thereby changing the width of the electric field in the resonant cavity to meet different detection needs.

[0143] Optionally, the microwave resonant cavity 100 further includes a protective sleeve, which sequentially passes through the cavity of the first cavity conduit, the inner chamber, and the cavity of the second cavity conduit;

[0144] The slide groove 9 is communicated with the cavity in the cavity conduit where it is located. The pushing block 10 includes a pushing part 101 and a connecting part 102. The connecting part 102 is arranged in the slide groove 9 and is connected to the adjusting rod 12. The pushing part 101 is a circular ring, and the end face of the circular ring is connected to the end face of the slip ring. The slip ring and the pushing part 102 are both sleeved on the protective sleeve.

[0145] The protective sleeve 14 can prevent the measured product from contaminating the inner chamber 6 of the resonant cavity during the measurement process. The protective sleeve 14 can be made of non-metallic material. In order to reduce the impact of the protective sleeve 14 on the electric field strength of the inner chamber 6, the material is preferably a material with low dielectric loss. At the same time, the selected material is required to have a small friction coefficient and wear resistance, such as a polymer compound.

[0146] Optionally, the adjustment hole 11 is a threaded hole, the adjustment rod 12 is a threaded rod, and the adjustment rod 12 is rotatably connected to the push block 10. Optionally, a hexagonal hole 13 is provided at one end of the threaded rod, so that a hexagonal wrench can be inserted into the threaded rod to rotate the threaded rod so that the slip ring is pushed to move in the inner chamber 6 along the first direction.

[0147] Optionally, the first cavity duct 4 and the second cavity duct 5 are circular, and the number of the adjusting rods, the pushing blocks and the slip rings are two each. The two adjusting rods are respectively arranged on the cavity side walls of the first cavity duct 4 and the cavity side walls of the second cavity duct 5, and each adjusting rod pushes the corresponding slip ring to move along the first direction in the inner chamber 6.

[0148] Specifically, the two slip rings represent the first internal slip ring 7 and the second internal slip ring 8, respectively, wherein the first internal slip ring 7 is arranged near the first cavity conduit 4, and is fixedly connected to one end of the pusher 101 located at the first cavity conduit 4; the second internal slip ring 8 is arranged near the second cavity conduit 5, and is fixedly connected to one end of the pusher 101 located at the second cavity conduit 5. Specifically, the first internal slip ring 7 and the second internal slip ring 8 are both located in the inner chamber 6, and the extension lengths of the first internal slip ring 7 and the second internal slip ring 8 are both at least one tenth of the gap distance of the inner chamber 6, and more preferably, the extension lengths of the first internal slip ring 7 and the second internal slip ring 8 are both more than one fifth of the gap distance of the inner chamber 6 of the resonance cavity.

[0149] Exemplarily, two insulating sleeves 15 are further provided on one side of the cavity, the feeding antenna 16 is provided in one of the insulating sleeves 15, and the decoupling antenna 17 is provided in the other insulating sleeve 15. In a specific implementation, the microwave signal is fed into the inner chamber 6 by the probe of the feeding antenna 16 by electric field coupling, and the signal is coupled out by the probe of the decoupling antenna 17 after the inner chamber 6 resonates, so as to realize the power transmission of the microwave signal in the inner chamber 6.

[0150] Specifically, Figure 4 As shown, the feeding antenna 16 and the decoupling antenna 17 are symmetrically arranged with the central axis of the cavity 6 in the resonant cavity as the symmetry axis.

[0151] Optionally, the cavity includes a cavity shell 1 and a cavity cover 2, and the cavity shell 1 and the cavity cover 2 are connected by bolts 3. Specifically, two fixing holes are provided on one side of the cavity shell 1 and the cavity cover 2, and fixing screws are provided in the fixing holes, and the cavity shell 1 and the cavity cover 2 are fixedly connected by the fixing screws.

[0152] Specifically, in the inner chamber 6, the distance between the cavity cover 2 and the cavity shell 1 is the gap distance of the inner chamber 6 of the resonant cavity, and the length of the first cavity conduit 4 and the length of the second cavity conduit 5 are both greater than or equal to the gap distance of the inner chamber 6. Further, the length of the first cavity conduit 4 and the length of the second cavity conduit 5 are 2 to 3 times the gap distance of the inner chamber 6, so as to further reduce the loss of the microwave electric field signal in the inner chamber 6 of the resonant cavity.

[0153] Furthermore, in order to prevent the temperature change from affecting the deformation of the cavity outside the resonant cavity, causing the size of the cavity 6 in the resonant cavity to change, thereby causing the shape of the resonance curve and the change of the vertex position, and finally causing the measurement error, the cavity shell 1 and the cavity cover 2 can be processed with a special alloy material with a low thermal expansion coefficient. For example, a gold layer can be plated on the outer surface of the cavity cover 2 and the cavity shell 1. This gold layer can effectively prevent the humidity in the working environment that causes the measurement stability problem from corroding the cavity cover 2 and the cavity shell 1. At the same time, the gold layer has good electrical conductivity and can improve the skin effect of the alloy material itself.

[0154] Furthermore, the inner chamber can be cylindrical, with the central axis of the resonant cavity chamber 6 as the axis of symmetry, and the cavity shell 1 and the cavity cover 2 are axisymmetric structures. The cylindrical, hollow resonant cavity chamber 6 facilitates the electromagnetic wave to form standing waves therein, thereby generating resonance. The main structure of the resonant cavity chamber 6 is a circular waveguide, and the two end faces are used to cut off the microwaves so that the electromagnetic waves resonate in the waveguide.

[0155] Correspondingly, an embodiment of the present invention further provides a computer-readable storage medium, on which instructions are stored, and when the instructions are executed on a computer, the computer executes the above-mentioned online burst bead filter rod quality detection method.

[0156] refer to Fig.10 , shown is a block diagram of an electronic device 400 according to an embodiment of the present application. The electronic device 400 may include one or more processors 401 coupled to a controller hub 403. For at least one embodiment, the controller hub 403 communicates with the processor 401 via a multi-drop bus such as a front side bus (FSB), a point-to-point interface such as a QuickPath Interconnect (QPI), or a similar connection. The processor 401 executes instructions that control general types of data processing operations. In one embodiment, the controller hub 403 includes, but is not limited to, a graphics memory controller hub (GMCH, Graphics & Memory Controller Hub) (not shown) and an input / output hub (IOH, Input Output Hub) (which may be on a separate chip) (not shown), wherein the GMCH includes a memory and a graphics controller and is coupled to the IOH.

[0157] The electronic device 400 may also include a coprocessor 402 and a memory 404 coupled to a controller hub 403. Alternatively, one or both of the memory and the GMCH may be integrated within the processor (as described in this application), with the memory 404 and the coprocessor 402 being directly coupled to the processor 401 and the controller hub 403, with the controller hub 403 being in a single chip with the IOH.

[0158] The memory 404 may be, for example, a dynamic random access memory (DRAM), a phase change memory (PCM), or a combination of the two. The memory 404 may include one or more tangible, non-transitory computer-readable media for storing data and / or instructions. The computer-readable storage medium stores instructions, specifically, temporary and permanent copies of the instructions. The instructions may include: when executed by at least one of the processors, causing the electronic device 400 to implement the following: Figure 1 When the instructions are executed on a computer, the computer is caused to execute the method disclosed in any one of the above embodiments or combined embodiments.

[0159] In one embodiment, the coprocessor 402 is a special purpose processor, such as, for example, a high throughput MIC (Many Integrated Core) processor, a network or communication processor, a compression engine, a graphics processor, a GPGPU (General-purpose computing on graphics processing units), or an embedded processor. The optional nature of the coprocessor 402 is indicated by a dashed line in FIG. Fig.10 middle.

[0160] In one embodiment, the electronic device 400 may further include a network interface (NIC, Network Interface Controller) 406. The network interface 406 may include a transceiver for providing a radio interface for the electronic device 400, and then communicating with any other suitable device (such as a front-end module, an antenna, etc.). In various embodiments, the network interface 406 may be integrated with other components of the electronic device 400. The network interface 406 may implement the functions of the communication unit in the above-mentioned embodiments.

[0161] The electronic device 400 may further include an input / output (I / O) device 405. The I / O 405 may include: a user interface designed to enable a user to interact with the electronic device 400; a peripheral component interface designed to enable peripheral components to interact with the electronic device 400; and / or a sensor designed to determine environmental conditions and / or location information related to the electronic device 400.

[0162] It is worth noting that Fig.10 This is for illustrative purposes only. Fig.10 It is shown that the electronic device 400 includes multiple devices such as a processor 401, a controller hub 403, a memory 404, etc.; however, in actual applications, the device using the methods of the present application may include only a portion of the devices in the electronic device 400, for example, it may include only the processor 401 and the network interface 406. Fig.10 The properties of optional devices are shown with dashed lines.

[0163] Reference now Fig.11 , which is a block diagram of a SoC (System on Chip) 500 according to an embodiment of the present application. Fig.11 In the FIG, similar components have the same reference numerals. In addition, the dashed boxes are optional features of more advanced SoCs. Fig.11 In the embodiment, SoC 500 includes: an interconnect unit 550 coupled to a processor 510; a system agent unit 580; a bus controller unit 590; an integrated memory controller unit 540; a group or one or more coprocessors 520, which may include integrated graphics logic, an image processor, an audio processor, and a video processor; a static random access memory (SRAM) unit 530; and a direct memory access (DMA) unit 560. In one embodiment, the coprocessor 520 includes a special-purpose processor, such as, for example, a network or communication processor, a compression engine, a GPGPU (General-purpose computing on graphics processing units), a high-throughput MIC processor, or an embedded processor.

[0164] The static random access memory (SRAM) unit 530 may include one or more tangible, non-transitory computer-readable media for storing data and / or instructions. Instructions are stored in the computer-readable storage medium, specifically, temporary and permanent copies of the instructions are stored. The instructions may include: instructions that cause the SoC 500 to implement the method shown in 1 when executed by at least one of the processors. When the instructions are executed on a computer, the computer executes the method disclosed in the above embodiments.

[0165] Each method implementation mode of the present application can be implemented in the form of software, magnetic components, firmware, etc.

[0166] Program code can be applied to input instructions to perform each function described herein and generate output information. The output information can be applied to one or more output devices in a known manner. For the purpose of this application, the processing system includes any system having a processor such as, for example, a digital signal processor (DSP), a microcontroller, an application specific integrated circuit (ASIC), or a microprocessor.

[0167] Program code can be implemented with high-level programming language or object-oriented programming language to communicate with the processing system. When necessary, program code can also be implemented with assembly language or machine language. In fact, the mechanism described herein is not limited to the scope of any specific programming language. In either case, the language can be a compiled language or an interpreted language.

[0168] One or more aspects of at least one embodiment may be implemented by representative instructions stored on a computer-readable storage medium, which represent various logics in a processor, and when the instructions are read by a machine, the machine makes logic for performing the technology herein. These representations, known as "IP (Intellectual Property, Intellectual Property) cores", may be stored on a tangible computer-readable storage medium and provided to multiple customers or production facilities to be loaded into a manufacturing machine that actually manufactures the logic or processor.

[0169] In some cases, the instruction converter can be used to convert instructions from a source instruction set to a target instruction set. For example, the instruction converter can transform (e.g., using static binary transformation, dynamic binary transformation including dynamic compilation), deform, simulate, or otherwise convert instructions into one or more other instructions to be processed by the core. The instruction converter can be implemented in software, hardware, firmware, or a combination thereof. The instruction converter can be on the processor, outside the processor, or partially on the processor and partially outside the processor.

[0170] Although the present invention has been illustrated and described with reference to certain preferred embodiments of the present invention, it should be understood by those skilled in the art that the above is a further detailed description of the present invention in conjunction with specific embodiments, and it cannot be determined that the specific implementation of the present invention is limited to these descriptions. Those skilled in the art may make various changes in form and details, including making several simple deductions or substitutions, without departing from the spirit and scope of the present invention.

Claims

1. An online bead filter rod quality detection device, It is characterized in that include: A microwave resonant cavity is provided with a feeding antenna, a decoupling antenna and a detection channel for accommodating a bursting bead filter rod; A microwave source, connected to the feeding antenna, and configured to send a microwave signal to the microwave resonant cavity through the feeding antenna; A voltage signal converter, connected to the decoupling antenna, for converting the microwave response signal into a voltage signal and then outputting it; A processing device, connected to the voltage signal converter, for establishing a characteristic curve according to the voltage signal and the receiving time corresponding to the voltage signal, and judging the quality of the burst bead filter rod according to the peak of the characteristic curve; The microwave resonant cavity comprises: A cavity body having an inner chamber configured as a resonant cavity; The first cavity conduit and the second cavity conduit are respectively arranged on both sides of the cavity along the first direction, and the first cavity conduit and the second cavity conduit both have cavities connected to the inner chamber; the cavity side wall of the first cavity conduit and / or the cavity side wall of the second cavity conduit are provided with adjustment holes and slide grooves; An adjusting rod, arranged in the adjusting hole; A slip ring is disposed in the inner chamber; a push block, at least partially disposed in the slide groove, the push block being connected to the adjustment rod and the slip ring respectively, the adjustment rod being movable in the adjustment hole, and when the adjustment rod moves, the adjustment rod drives the slip ring to move in the inner chamber along the first direction through the push block, so as to change the distance between the slip ring and the side wall of the resonant cavity on the opposite side thereof; a protective sleeve, the protective sleeve sequentially passing through the cavity of the first cavity catheter, the inner chamber and the cavity of the second cavity catheter; The slide groove is communicated with the cavity in the cavity conduit where it is located, and the pushing block includes a pushing part and a connecting part, the connecting part is arranged in the slide groove and connected to the adjusting rod, the pushing part is a circular ring, and the end face of the circular ring is connected to the end face of the slip ring, and the slip ring and the pushing part are both sleeved on the protective sleeve.

2. The on-line burst bead filter rod quality detection device according to claim 1, It is characterized in that Also includes: a data buffer, connected to the voltage signal converter, for receiving the voltage signal output by the voltage signal converter in real time, and caching the received voltage signal and the receiving time corresponding to the voltage signal; The processing device is connected to the data buffer, and is used to retrieve the voltage signal and the receiving time corresponding to the voltage signal in the data buffer, and establish a characteristic curve according to the voltage signal and the receiving time.

3. The on-line bead filter rod quality detection device according to claim 1, It is characterized in that The characteristic curve is a distance-voltage characteristic curve that characterizes the change of the voltage signal with the distance of the bursting bead in the filter rod. The processing device determines whether the bursting bead filter rod is qualified according to the characteristic curve, including: The processing device obtains the number of peaks of the distance-voltage characteristic curve, and compares the number of peaks with a preset value to determine whether the number of burst beads in the burst bead filter rod is qualified; and / or, The processing device obtains the distance point information corresponding to each peak of the distance-voltage characteristic curve, obtains the implantation position of the bursting bead corresponding to each peak according to the distance point information of the peak, and determines whether the implantation position of the bursting bead is accurate; and / or, The processing device obtains the distance points corresponding to each peak of the distance-voltage characteristic curve, selects an interval including the distance point near the distance point corresponding to the peak for each peak, integrates the voltage signal in the interval to obtain the capacity coefficient corresponding to the peak, and determines whether the capacity of the bursting bead corresponding to the peak is qualified according to the capacity coefficient; and / or, The processing device obtains the peak value of each peak of the distance-voltage characteristic curve, and for each peak, calculates the ratio of the peak value of the peak to the width of the bursting bead to obtain the deformation coefficient of the peak, and determines whether the bursting bead is damaged according to the deformation coefficient.

4. The on-line bead filter rod quality detection device according to claim 1, It is characterized in that It also includes a controller and a rejection mechanism, wherein the controller is connected to the rejection mechanism and the processing equipment respectively. When the processing equipment determines that the burst bead filter rod is unqualified, a rejection signal is sent to the controller, and the controller controls the operation of the rejection mechanism according to the rejection signal.

5. The on-line bead filter rod quality detection device according to claim 1, It is characterized in that The operating frequency of the microwave source is located at the rising or falling edge region of the microwave resonance cavity transmission curve, and the operating frequency of the microwave source is constant during the detection process.

6. The on-line burst bead filter rod quality detection device as claimed in claim 5, It is characterized in that The operating frequency of the microwave source is the frequency corresponding to the half-power point of the microwave resonant cavity transmission curve.

7. The on-line burst bead filter rod quality detection device as claimed in claim 5, It is characterized in that The operating frequency of the microwave source is 1-10 GHz.

8. An online bead filter rod quality detection method, It is characterized in that The detection method is applied to the detection device of any one of claims 1 to 7, comprising: Providing a microwave signal to the microwave resonant cavity using a microwave source; The microwave resonant cavity detects the burst bead filter rod located in its detection channel and outputs a microwave response signal; receiving the microwave response signal in real time, and converting the microwave response signal into a voltage signal; Establishing a characteristic curve according to the voltage signal and the receiving time corresponding to the voltage signal; The distance information corresponding to the voltage signal is determined by the receiving time corresponding to the voltage signal, and then a distance-voltage characteristic curve is established according to the voltage signal and the corresponding distance information; The quality of the burst bead filter rod is judged according to the peak of the distance-voltage characteristic curve.

9. The on-line bead filter rod quality detection method according to claim 8, It is characterized in that The characteristic curve is a distance-voltage characteristic curve that characterizes the change of the voltage signal with the distance of the bursting bead in the filter rod; judging the quality of the bursting bead filter rod according to the peak of the characteristic curve includes: Obtaining the number of peaks of the distance-voltage characteristic curve, and comparing the number of peaks with a preset value to determine whether the number of burst beads in the burst bead filter rod is qualified; and / or, Obtaining the distance point information corresponding to each peak of the distance-voltage characteristic curve, for each peak, obtaining the implantation position of the bursting bead corresponding to the peak according to the distance point information of the peak, and judging whether the implantation position of the bursting bead is accurate; and / or, Obtaining the distance points corresponding to each peak of the distance-voltage characteristic curve, for each peak, selecting an interval including the distance point near the distance point corresponding to the peak, integrating the voltage signal in the interval to obtain the capacity coefficient corresponding to the peak, and judging whether the capacity of the burst bead corresponding to the peak is qualified according to the capacity coefficient; and / or, The peak value of each peak of the distance-voltage characteristic curve is obtained, and for each peak, the ratio of the peak value of the peak to the width of the bursting bead is calculated to obtain the deformation coefficient of the peak, and whether the bursting bead is damaged is determined according to the deformation coefficient.

10. The on-line bead filter rod quality detection method according to claim 8, It is characterized in that The operating frequency of the microwave source is located at the rising or falling edge region of the microwave resonance cavity transmission curve, and the operating frequency of the microwave source is constant during the detection process.

11. The on-line bead filter rod quality detection method according to claim 10, It is characterized in that The operating frequency of the microwave source is the frequency corresponding to the half-power point of the microwave resonant cavity transmission curve.

12. The on-line bead filter rod quality detection method according to claim 10, It is characterized in that The operating frequency of the microwave source is 1-10 GHz.

13. The on-line bead filter rod quality detection method according to claim 8, It is characterized in that Before establishing the characteristic curve according to the voltage signal and the receiving time corresponding to the voltage signal, and after receiving the microwave response signal in real time and converting the microwave response signal into a voltage signal, the method further includes: The voltage signal received in real time and the receiving time corresponding to the voltage signal are cached.

14. A computer-readable storage medium, It is characterized in that The computer-readable storage medium stores instructions, which, when executed on a computer, enable the computer to execute the method according to any one of claims 8 to 13.

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