Blockage detection method, device and equipment, storage medium and program product

Abstract

The invention relates to the technical field of detection, and discloses a blockage detection method, device and equipment, a storage medium and a program product, and the method comprises the steps: determining the current pressure change rate and the current flow of a to-be-detected pipeline in unit time; obtaining a pre-established relation model; and based on the current pressure change rate, the current flow and the relation model, whether the to-be-detected pipeline is blocked or not is determined. When it is determined that the to-be-detected pipeline is blocked, the current impedance and the current frequency of the to-be-detected pipeline and the reference impedance and the reference frequency of the to-be-detected pipeline under the non-blocking condition are obtained; based on the current impedance and the current frequency, the current impedance variable quantity and the current frequency variable quantity of the to-be-detected pipeline are determined; determining a current node ratio; and determining a blockage position corresponding to the current node ratio based on a pre-established corresponding relation function. Whether the pipeline is blocked or not can be rapidly analyzed, the blocked position can be judged in time, and therefore operation safety and operation smoothness are improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of detection, in particular to a blockage detection method, device, equipment, storage medium and program product. BACKGROUND

[0002] The ultrasonic suction surgical device is a commonly used suction tool in surgical operations, which is usually used to remove tumors, foreign bodies or necrotic tissues, etc. It generates high-frequency vibration through ultrasonic technology to break the structure of the target tissue, and then generates negative pressure to suck the surrounding liquid and tissue fragments, so as to discharge these foreign bodies.

[0003] The current negative pressure control of the ultrasonic suction surgical device generally adjusts the negative pressure by means of a negative pressure pump and a proportional regulating valve, that is, the negative pressure pump rotates at a constant speed, and the proportional regulating valve controls the negative pressure value. During operation, the tool or handle of the ultrasonic suction surgical device sometimes sucks in too much tissue to cause blockage, which cannot be found in time, causing the system to fail to work normally. The current ultrasonic suction surgical device does not have a blockage detection function, and the device usually relies on the observation and experience of the operator to judge whether the pipeline is blocked, and the blockage is often found when it is in a completely blocked state, which is easy to cause device failure. SUMMARY

[0004] Therefore, the present application provides a blockage detection method, device, equipment, storage medium and program product to solve the problem that it is difficult to early judge whether the ultrasonic suction surgical device is blocked in the prior art.

[0005] In a first aspect, the present application provides a blockage detection method, which comprises: determining a current pressure change rate and a current flow rate of a to-be-detected pipeline in a unit time; obtaining a previously established relationship model, the relationship model being a relationship function between the pressure change rate and the blockage degree; determining whether the to-be-detected pipeline is blocked based on the current pressure change rate, the current flow rate and the relationship model; in a case where it is determined that the to-be-detected pipeline is blocked, obtaining a current impedance and a current frequency of the to-be-detected pipeline; determining a current impedance change amount and a current frequency change amount of the to-be-detected pipeline based on the current impedance and the current frequency, respectively; obtaining a reference impedance and a reference frequency of the to-be-detected pipeline under no blockage; determining a current node ratio based on the current impedance change amount, the current frequency change amount, the reference impedance and the reference frequency; determining a blockage position corresponding to the current node ratio based on a previously established corresponding relationship function, the corresponding relationship function being a corresponding relationship between the node ratio and the positions of each node in the to-be-detected pipeline.

[0006] The present application can quickly analyze whether the pipeline is blocked based on the dynamic pressure change rate and the pre-established relationship model, has high real-time and accuracy. Through this method, the ultrasonic suction surgical equipment can discover and handle the pipeline blockage problem in time at an early stage, prevent serious blockage and equipment damage, and thus avoid affecting the smoothness and safety of the operation. In addition, in the present application, after detecting that the pipeline is blocked, the blockage position can be further judged. Using the pressure change rate, resonance frequency and impedance to judge suction blockage can timely judge whether the catheter is blocked, and accurately judge the blockage position, help the operator to timely locate and handle the blockage problem, avoid the operation delay or safety hidden danger caused by equipment failure, and thus improve the safety of the operation and the smoothness of the operation.

[0007] In an alternative embodiment, the relationship model is: ; wherein, is the blockage degree, is a calibration constant, is the current flow rate, is the pipe cross-sectional area of the pipeline to be detected, is the current pressure change rate, is the pressure value, is the time.

[0008] In an alternative embodiment, the corresponding relationship function is determined by the following steps: attach a standard mass block to different node positions in the standard pipeline to be detected; respectively detect the standard impedance and the standard frequency corresponding to each node position in different time sequences; based on the standard impedance and the standard frequency, calculate the standard impedance change and the standard frequency change of adjacent time; calculate the ratio of the standard impedance change to the reference impedance to obtain the impedance ratio; calculate the ratio of the standard frequency change to the reference frequency to obtain the frequency ratio; calculate the ratio of the impedance ratio to the frequency ratio to obtain the node ratio; fit the node ratio with the node position to obtain the corresponding relationship function; In an alternative embodiment, the corresponding relationship function is: ; wherein, is the node position, is the current maximum amplitude, is the node ratio.

[0009] In this embodiment, by accurately fitting the relationship between the impedance and frequency ratio and the node position, the position of the blockage can be located in time and accurately when the pipeline is blocked, which can greatly improve the efficiency of maintenance and processing and avoid wasting too much time on inspection.

[0010] In an alternative embodiment, the method further comprises: obtaining a current pressure value of the pipeline to be detected; determining whether the current pressure value exceeds a preset pressure value; in the case where the current pressure value exceeds the preset pressure value, controlling the electromagnetic valve to open for a set time so that the pressure value of the pipeline to be detected is reduced to a preset minimum pressure value; the electromagnetic valve is used to control the operation of the negative pressure pump.

[0011] In this embodiment, by monitoring the pressure value of the pipeline to be detected in real time and automatically adjusting when the pressure value exceeds the preset value, the damage or safety hazards caused by excessive pipeline pressure can be effectively prevented. By controlling the electromagnetic valve to open and adjusting the operation of the negative pressure pump, the pressure of the pipeline is reduced in time, avoiding the adverse effects of long-term high pressure on the equipment or pipeline. At the same time, the automatic control of this process can reduce human intervention, improve the stability and service life of the surgical equipment, ensure that the equipment operates in a safe and optimal state, and thus improve the safety and efficiency of the surgery.

[0012] In an alternative embodiment, the set time is obtained by the following steps: obtaining a time weight coefficient, which is calculated from the decrease of the pipeline to be detected from the maximum pressure value to the minimum pressure value; determining a first difference value between the current pressure value and the preset pressure value; multiplying the time weight coefficient and the first difference value to obtain the set time.

[0013] In this embodiment, the working time of the electromagnetic valve is accurately set by calculating the product of the time weight coefficient and the pressure difference, which can ensure that the pipeline pressure fluctuates within a safe range and helps to improve the stability of the equipment, thereby providing safety assurance for the surgery.

[0014] In a second aspect, the present application provides a blockage detection device, which comprises: a determination module for determining the current pressure change rate and the current flow rate of the pipeline to be detected per unit time; an acquisition module for acquiring a pre-established relationship model, which is a relationship function between the pressure change rate and the degree of blockage; a judgment module for determining whether the pipeline to be detected is blocked based on the current pressure change rate, the current flow rate, and the relationship model; The blockage position determination module is configured to, in a case where it is determined that the pipe to be detected is blocked, acquire a current impedance and a current frequency of the pipe to be detected; determine a current impedance variation and a current frequency variation of the pipe to be detected based on the current impedance and the current frequency; acquire a reference impedance and a reference frequency of the pipe to be detected in a case where the pipe to be detected is not blocked; determine a current node ratio based on the current impedance variation, the current frequency variation, the reference impedance, and the reference frequency; and determine a blockage position corresponding to the current node ratio based on a pre-established corresponding relationship function. The corresponding relationship function is a corresponding relationship between the node ratio and positions of nodes in the pipe to be detected.

[0015] In a third aspect, the present application provides a computer device, comprising a memory and a processor, the memory and the processor are communicatively connected with each other, the memory stores computer instructions, and the processor executes the computer instructions to perform the blockage detection method of the first aspect or any of the corresponding embodiments thereof.

[0016] In a fourth aspect, the present application provides a computer readable storage medium, which stores computer instructions, and the computer instructions are used to make a computer execute the blockage detection method of the first aspect or any of the corresponding embodiments thereof.

[0017] In a fifth aspect, the present application provides a computer program product, which comprises computer instructions, and the computer instructions are used to make a computer execute the blockage detection method of the first aspect or any of the corresponding embodiments thereof.

[0018] It should be noted that the blockage detection device, the computer device, the computer readable storage medium, and the computer program product provided by the present application correspond to the blockage detection method described above. Therefore, the beneficial effects of the blockage detection device, the computer device, the computer readable storage medium, and the computer program product are described above, and will not be repeated here. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or prior art description. Obviously, the drawings described below are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0020] Figure 1 is a flowchart of blockage detection and blockage position determination according to an embodiment of the present application; Figure 2 is a schematic diagram of the corresponding curve according to an embodiment of the present application for various typical working conditions ​ Figure 3 is a schematic diagram of the relationship between the degree of blockage and the rate of pressure change according to an embodiment of the present application; Figure 4 is a schematic diagram of the flow of a blockage detection method according to an embodiment of the present application; Figure 5 is a schematic diagram of the flow of blockage position determination according to an embodiment of the present application; Figure 6 is a schematic diagram of the relationship between the blockage position and the node ratio according to an embodiment of the present application; Figure 7 is a schematic block diagram of system control of an ultrasonic suction surgery device according to an embodiment of the present application; Figure 8 is a schematic block diagram of negative pressure control according to an embodiment of the present application; Figure 9 is a structural block diagram of a blockage detection device according to an embodiment of the present application; Figure 10 is a schematic diagram of the hardware structure of a computer device according to an embodiment of the present application. DETAILED DESCRIPTION

[0021] To make the objects, technical solutions and advantages of embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are some but not all of the embodiments of the present application. Based on the embodiments in the present application, all other embodiments obtained by a person of ordinary skill in the art without creative work fall within the protection scope of the present application.

[0022] According to an embodiment of the present application, a blockage detection method is provided. It should be noted that the steps shown in the flowchart of the drawings can be executed in a computer system such as a set of computer executable instructions, and although a logical order is shown in the flowchart, in some cases, the steps shown or described herein can be executed in an order different from that shown herein.

[0023] In the present embodiment, a blockage detection method is provided, which can be executed by an ultrasonic suction surgery device, a server, a terminal, a mobile terminal, and the like, Figure 1 is a flowchart of a blockage detection method according to an embodiment of the present application, as shown in Figure 1 the flow includes the following steps: Step S101, determining the current rate of pressure change and the current flow of the pipeline to be detected in a unit time.

[0024] Under stable flow conditions in a pipeline, blockage significantly alters the local velocity and pressure distribution of fluid flowing through the blockage point. This change is not only reflected in the absolute pressure value but, more importantly, in the rate of pressure change over time, i.e., the rate of pressure change. The formation or worsening of blockage leads to a change in the characteristic pattern of the rate of pressure change. Therefore, this embodiment primarily collects the rate of pressure change and flow rate of the pipeline under test per unit time.

[0025] In this embodiment, the tubing to be tested can be the suction tubing of the ultrasonic scalpel in an ultrasonic aspiration surgical device, the suction tubing in the ultrasonic handpiece of the ultrasonic aspiration surgical device, or the tubing in the catheter of the ultrasonic aspiration surgical device, etc. The unit time can be selected as seconds, such as the pressure change rate per second, the flow rate per second, etc.

[0026] Step S102: Obtain the pre-established relational model, which is a relational function between the rate of pressure change and the degree of blockage.

[0027] In some alternative implementations, the relational model is as follows: ; in, To indicate the degree of congestion, For calibration constants, For current traffic, The cross-sectional area of ​​the pipeline to be tested. The current rate of change of pressure. This is the pressure value. For time.

[0028] This is a system calibration constant, the value of which depends on fluid density, pipeline geometry, etc. This represents the rate of change of pressure per unit time. Specifically, in a practical system, discrete pressure values ​​can be measured using a pressure sensor. Then calculate the pressure difference between adjacent sampling points. With time interval ratio To approximate .

[0029] Reference Figure 2 As shown, this illustrates various typical operating conditions. Corresponding curve. During the establishment of the relational model, the system operates under different typical working conditions for a period of time, collects pressure signals, and calculates the pressure change rate in real time. Specifically, numerical differentiation algorithms, such as the finite difference method, can be used. Where n represents the sampling points and k is the selected differential step size, k=1,2... Then, the relationship function between the pressure change rate and the degree of blockage is determined based on the pressure change rate and flow rate under different typical operating conditions. (Refer to...) Figure 3 The diagram shown illustrates the relationship between the degree of blockage and the rate of pressure change.

[0030] Step S103: Based on the current pressure change rate, current flow rate, and relationship model, determine whether the pipeline to be tested is blocked.

[0031] Specifically, refer to Figure 4 As shown, the pressure value is monitored, and the current pressure change rate is determined. The current pressure change rate and current flow rate are then substituted into a pre-established relational model to calculate the current blockage level S. Furthermore, the calculated blockage level can be compared with a dynamic threshold under the current operating conditions. If the dynamic threshold is exceeded, the pipeline under test is determined to be blocked. The average value, standard deviation, and maximum fluctuation range of the blockage level at different times can be statistically analyzed, and a dynamic threshold can be set based on the statistical results.

[0032] In this embodiment, during the actual operation of the ultrasonic aspiration surgical device, the pressure change rate of the tubing is calculated in real time. Based on the dynamic pressure change rate and a pre-established relationship model, it is possible to quickly analyze whether the tubing is blocked, exhibiting high real-time performance and accuracy. Through this method, the ultrasonic aspiration surgical device can detect and address tubing blockages early, preventing severe blockages and equipment damage, thereby avoiding impacts on the smoothness and safety of the surgical procedure.

[0033] Step S104, if it is determined that the pipeline to be tested is blocked, refer to Figure 5 As shown, the current impedance of the pipeline under test is obtained. and current frequency .

[0034] Specifically, the impedance and vibration frequency of the ultrasonic aspiration surgical device's blade can be measured using sensors equipped with the device. Specifically, the impedance R can be calculated using the ratio U / I by detecting the effective values ​​of the voltage and current signals of the ultrasonic transducer, and the vibration frequency can be obtained by detecting the voltage frequency.

[0035] Step S105, based on the current impedance and current frequency Determine the current impedance change of the pipeline under test respectively. and the current frequency change .

[0036] Specifically, the change in impedance between the current impedance and the impedance at the previous moment can be taken as the change in current impedance, and the change in frequency between the current frequency and the frequency at the previous moment can be taken as the change in current frequency.

[0037] Step S106: Obtain the reference impedance and reference frequency of the pipeline under test when it is unblocked.

[0038] Step S107: Determine the current node ratio based on the current impedance change, the current frequency change, the reference impedance, and the reference frequency.

[0039] Specifically, this can be achieved through the formula, namely Determine the ratio of the current node.

[0040] in, The change in impedance. The change in frequency The reference impedance when there is no blockage is , Reference frequency when there is no congestion.

[0041] Step S108: Based on the pre-established correspondence function, determine the blockage location corresponding to the current node ratio; the correspondence function is the correspondence between the node ratio and the location of each node in the pipeline to be detected.

[0042] Reference Figure 6 The diagram shown illustrates the relationship between blockage locations and node ratios. In this embodiment, the correspondence function is implemented by precisely attaching a tiny standard mass block to different known locations on the pipeline after the pipeline design is finalized. Above. At each position, detect the current... and Record a series Calculate Thus, the relationship function is obtained by fitting.

[0043] Taking the ultrasonic scalpel head and handle of an ultrasonic aspiration surgical device as an example, one end of the ultrasonic scalpel head (handle end) is driven, and the other end (blade tip) vibrates longitudinally, exhibiting nodes and antinodes. A node is the position where the amplitude is zero, the strain is maximum, and stress is concentrated. An antinode is the position where the amplitude is maximum.

[0044] The effect of blockages on equipment (the amount of change in frequency and impedance) strongly depends on the location of their attachment point relative to nodes and antinodes. For example, adding a mass block at an antinode has the greatest effect on the resonant frequency f because the amplitude is largest and the kinetic energy change is greatest there. Adding dissipation at a node has the greatest effect on the impedance Z because the strain is largest and the acoustic energy loss is greatest there.

[0045] Assuming the vibration mode of the tool is first-order longitudinal vibration, its shape function is: where x=0 is the node position, and x=L is the blade tip antinode position. When a mass of m is attached at position x, according to the perturbation theory, its relative change of resonance frequency is proportional to the kinetic energy density at the attachment point. Similarly, the mass causes additional acoustic energy loss, which can be equivalent to adding a damping R at position x. Its effect on the impedance change is proportional to the potential energy density (strain energy density) at the position. which is proportional to the square of the vibration amplitude at the position. At the antinode , and at the node When the calculated clogging position is near the antinode, then stop output and sound an alarm for clogging; when the calculated clogging position is near the node, then sound an alarm for negative pressure abnormality.

[0046] In this embodiment, the ratio is defined; where is the impedance change, is the frequency change, is the reference impedance without clogging, and is the reference frequency without clogging.

[0047] In this embodiment, after detecting that the pipeline is clogged, the clogging position can be further determined. Using the pressure change rate, the resonance frequency, and the impedance to determine the suction clogging, the catheter clogging can be determined in time, and the clogging position can be accurately determined, helping the operator to timely locate and handle the clogging problem, avoiding the delay or safety hazard of the operation due to equipment failure, thereby improving the safety of the operation and the smoothness of the operation.

[0048] In some optional embodiments, the corresponding relationship function is determined by the following steps: attach a standard mass block at different node positions in a standard pipeline to be detected; respectively detect the standard impedance and the standard frequency corresponding to each node position in different time sequences; based on the standard impedance and the standard frequency, calculate the standard impedance change and the standard frequency change of adjacent times; calculate the ratio of the standard impedance change to the reference impedance to obtain the impedance ratio; calculate the ratio of the standard frequency change to the reference frequency to obtain the frequency ratio; calculate the ratio of the impedance ratio to the frequency ratio to obtain the node ratio; fit the node ratio with the node position to obtain the corresponding relationship function; The corresponding relationship function is: ; in, For node position, This is the current maximum amplitude. This represents the node ratio.

[0049] The location of the blocked node x and the ratio K have a corresponding functional relationship: x = F(K). The function F(K) is determined by experimental calibration. Specifically, taking the tubing in an ultrasonic scalpel as an example, after the ultrasonic scalpel design is finalized, a tiny standard mass block can be precisely attached to different known locations on the ultrasonic scalpel. Above. At each position, detect the current... and Record a series Calculate This allows us to fit the corresponding relationship function.

[0050] Based on the above method, the formula for the blockage location and ratio K is obtained: .

[0051] In this embodiment, by accurately fitting the relationship between impedance and frequency ratio and node position, the location of blockage can be located in a timely and accurate manner when a blockage occurs in the pipeline. This can greatly improve the efficiency of maintenance and handling, and avoid wasting too much time on inspection.

[0052] In some alternative implementations, the method further includes: Obtain the current pressure value of the pipeline to be tested; Determine whether the current pressure value exceeds the preset pressure value; When the current pressure value exceeds the preset pressure value, the solenoid valve is opened for a set time to reduce the pressure value of the pipeline under test to the preset minimum pressure value; the solenoid valve is used to control the operation of the negative pressure pump.

[0053] Reference Figure 7 The diagram shown is a schematic block diagram of the system control of an ultrasonic aspiration surgical device. The power input is adjusted to the DC voltage required by the system through a voltage regulating circuit, and then converted into a high-frequency sinusoidal signal by a power amplifier circuit and a power transformer to drive the transducer to generate a high-frequency vibration signal.

[0054] To ensure maximum output efficiency, the transducer needs to be kept in phase (i.e., resonant point) at all times through automatic frequency modulation technology. This part calculates the phase angle by sampling the output voltage and current signals, and the processor adjusts the digital frequency synthesizer according to the phase angle to ensure that the output frequency always tracks the resonant frequency.

[0055] Reference Figure 8As shown, when detecting the air pressure on the pipeline of the real-time detection system, the pressure value is converted into an analog voltage by the pressure sensor, i.e. through AD sampling into the processor, and the processor controls the rotation speed of the vacuum pump according to the set pressure value T1 and the current pressure value T2 by using the PID algorithm. At the same time, when the collected pressure value exceeds the preset pressure value, i.e. exceeds the set value by a large margin, the electromagnetic valve is opened for a period of time t, so that the air path is opened to achieve the goal of rapidly reducing the pressure.

[0056] In this embodiment, by monitoring the pressure value of the pipeline to be detected in real time and automatically adjusting when the pressure value exceeds the preset value, the damage or safety hazards caused by excessively high pipeline pressure can be effectively prevented. By controlling the opening of the electromagnetic valve and adjusting the operation of the negative pressure pump, the pressure of the pipeline is timely reduced, avoiding the adverse effects of high pressure on the equipment or pipeline for a long time. At the same time, the automatic control of this process can reduce human intervention, improve the stability and service life of the surgical equipment, ensure that the equipment operates in a safe and optimal state, and thus improve the safety and efficiency of the surgery.

[0057] In some optional embodiments, the set time is obtained by the following steps: obtaining a time weight coefficient, which is calculated based on the decrease of the pipeline to be detected from the maximum pressure value to the minimum pressure value; determining a first difference between the current pressure value and the preset pressure value; multiplying the time weight coefficient and the first difference to obtain the set time.

[0058] In this embodiment, the time of the opened electromagnetic valve can be determined according to the formula: .

[0059] wherein, is the time weight coefficient, T1 is the preset pressure value, and T2 is the current pressure value.

[0060] When the time weight coefficient is determined, first, the maximum set value of the negative pressure to the system is established, such as -80 Kpa, and then the electromagnetic valve is opened to calculate the pressure drop to 0 Kpa, and the time t1 of the pressure drop process is obtained, thereby obtaining the time weight coefficient , i.e. .

[0061] In this embodiment, the product of the time weight coefficient and the pressure difference value is calculated to accurately set the working time of the electromagnetic valve, which can ensure that the pipeline pressure fluctuates within a safe range and helps to improve the stability of the equipment, thereby providing safety protection for the surgery.

[0062] A blockage detection apparatus is also provided in the present embodiments, which is used to implement the above embodiments and preferred embodiments, and will not be described again. As used below, the term "module" can be a combination of software and / or hardware that implements a predetermined function. Although the apparatus described in the following embodiments is preferably implemented in software, implementation in hardware, or a combination of software and hardware, is also possible and contemplated.

[0063] The present embodiments provide a blockage detection apparatus, as shown in Figure 9 The apparatus comprises: A determination module 201 is configured to determine a current pressure change rate and a current flow rate of a pipeline to be detected in a unit time.

[0064] An acquisition module 202 is configured to acquire a pre-established relationship model, which is a relationship function between the pressure change rate and the blockage degree; the relationship model is: ; wherein, is the blockage degree, is a calibration constant, is the current flow rate, is a pipe cross-sectional area of the pipeline to be detected, is the current pressure change rate, is a pressure value, is time.

[0065] A judgment module 203 is configured to determine whether the pipeline to be detected is blocked based on the current pressure change rate, the current flow rate, and the relationship model.

[0066] A blockage position judgment module 204 is configured to acquire a current impedance and a current frequency of the pipeline to be detected; determine a current impedance change amount and a current frequency change amount of the pipeline to be detected based on the current impedance and the current frequency; acquire a reference impedance and a reference frequency of the pipeline to be detected without blockage; determine a current node ratio based on the current impedance change amount, the current frequency change amount, the reference impedance, and the reference frequency; determine a blockage position corresponding to the current node ratio based on a pre-established corresponding relationship function; the corresponding relationship function is a corresponding relationship between the node ratio and positions of each node in the pipeline to be detected.

[0067] In some optional embodiments, the apparatus further comprises: The correspondence function establishing module is used for attaching the standard mass block to different node positions in the standard pipeline to be detected; the standard impedance and the standard frequency corresponding to each node position in different time sequences are detected respectively; the standard impedance variation and the standard frequency variation of adjacent time are calculated based on the standard impedance and the standard frequency; the impedance ratio is obtained by calculating the ratio of the standard impedance variation and the reference impedance; the frequency ratio is obtained by calculating the ratio of the standard frequency variation and the reference frequency; the node ratio is obtained by calculating the ratio of the impedance ratio and the frequency ratio; the node ratio is fitted with the node position to obtain the correspondence function; the correspondence function is: ; wherein, is the node position, is the current maximum amplitude, is the node ratio.

[0068] The negative pressure adjusting module is used for obtaining the current pressure value of the pipeline to be detected; judging whether the current pressure value exceeds the preset pressure value; in the case that the current pressure value exceeds the preset pressure value, controlling the electromagnetic valve to open for a set time, so that the pressure value of the pipeline to be detected is reduced to the preset minimum pressure value; the electromagnetic valve is used for controlling the working of the negative pressure pump; and is further used for obtaining a time weight coefficient, the time weight coefficient being obtained by calculating the pipeline to be detected from the maximum pressure value to the minimum pressure value; determining a first difference value of the current pressure value and the preset pressure value; and taking the product of the time weight coefficient and the first difference value as the set time.

[0069] The blockage detection device in the embodiment is in the form of a functional unit, and the unit herein refers to an ASIC circuit, a processor and a memory executing one or more software or fixed programs, and / or other devices capable of providing the above functions.

[0070] Further function descriptions of the above various modules and units are the same as those of the above corresponding embodiments, and will not be described herein.

[0071] The embodiment of the application further provides a computer device with the blockage detection device shown in the above Figure 9 .

[0072] Please refer to Figure 10 , Figure 10 is a structural schematic diagram of a computer device provided by an optional embodiment of the application, as shown in Figure 10As shown, the computer device includes one or more processors 10, memory 20, and interfaces 30 for external devices such as a keyboard and a mouse and peripheral devices such as disk devices or other storage devices. One or more busses 10 can be used to implement the interface between the various internal and external components and can be implemented using any one or more of a variety of bus technologies including a System bus, PCI, SCSI, AGP, Super- I / O bus, etc. Furthermore, various buses can be used in front side buses, back side buses, and other bus configurations based on any bus or messaging technology known to those skilled in the art. Figure 10 The processor 10 is used in the embodiments below as an example.

[0073] The processor 10 can be a central processing unit, a network processor, or a combination thereof. The processor 10 can further include a hardware chip. The hardware chip can be an application specific integrated circuit, a programmable logic device, or a combination thereof. The programmable logic device can be a complex programmable logic device, a field programmable logic device, a general array logic, or any combination thereof.

[0074] The memory 20 stores instructions that can be executed by the at least one processor 10, so that the at least one processor 10 implements the method shown in the above embodiments.

[0075] The memory 20 can include a program region and a data region. The program region can store an operating system and an application program required by at least one function. The data region can store data created according to the use of the computer device, etc. In addition, the memory 20 can include a high-speed random access memory, and can further include a non-transitory memory such as at least one magnetic disk storage device, a flash memory device, or other non-transitory solid-state memory device. In some alternative embodiments, the memory 20 can optionally include a memory disposed remotely with respect to the processor 10, and these remote memories can be connected to the computer device through a network. Examples of the network include, but are not limited to, the Internet, an intranet, a local area network, a mobile communication network, and a combination thereof.

[0076] The memory 20 can include a volatile memory such as a random access memory, and can also include a non-volatile memory such as a flash memory, a hard disk, or a solid state disk. The memory 20 can further include a combination of the above-mentioned kinds of memories.

[0077] The computer device further includes a communication interface 30 for communication with other devices or communication networks.

[0078] The embodiments of the present application further provide a computer readable storage medium, and the method according to the embodiments of the present application can be implemented in hardware, firmware, or recorded in a storage medium, or stored in a remote storage medium or a non-transitory machine readable storage medium and downloaded to a local storage medium through network, so that the method described herein can be processed by such software on a storage medium using a general purpose computer, a special purpose processor, or programmable or special hardware. The storage medium can be a magnetic disk, an optical disk, a read-only memory, a random access memory, a flash memory, a hard disk, or a solid state disk, etc. Further, the storage medium can also include a combination of the above-mentioned memories. It can be understood that the computer, the processor, the microprocessor controller, or the programmable hardware includes a storage component that can store or receive software or computer code, when the software or computer code is accessed and executed by the computer, the processor, or the hardware, the method shown in the above embodiments is implemented.

[0079] Part of the present application can be applied as a computer program product, for example, computer program instructions, when executed by a computer, the operation of the computer can invoke or provide the method and / or technical solutions according to the present application. Those skilled in the art should understand that the form of computer program instructions in computer readable medium includes but is not limited to source file, executable file, installation package file, etc. Correspondingly, the way of computer program instructions executed by computer includes but is not limited to: the computer directly executes the instructions, or the computer compiles the instructions and then executes the corresponding compiled program, or the computer reads and executes the instructions, or the computer reads and installs the instructions and then executes the corresponding installed program. Here, the computer readable medium can be any available computer readable storage medium or communication medium accessible to the computer.

[0080] Although the embodiments of the present application are described in conjunction with the accompanying drawings, various modifications and changes can be made by those skilled in the art without departing from the spirit and scope of the present application, and such modifications and changes fall within the scope defined by the appended claims.

Claims

1. A plug detection method, characterized by, The method comprises: determining a current pressure change rate and a current flow rate of a pipeline to be detected per unit time; obtaining a pre-established relationship model, the relationship model being a relationship function between the pressure change rate and the degree of blockage; based on the current pressure change rate, the current flow rate and the relationship model, determining whether the pipeline to be detected is blocked; in the case where it is determined that the pipeline to be detected is blocked, obtaining a current impedance and a current frequency of the pipeline to be detected; based on the current impedance and the current frequency, respectively determining a current impedance change amount and a current frequency change amount of the pipeline to be detected; obtaining a reference impedance and a reference frequency of the pipeline to be detected under no blockage; based on the current impedance change amount, the current frequency change amount, the reference impedance and the reference frequency, determining a current node ratio; based on a pre-established corresponding relationship function, determining a blockage position corresponding to the current node ratio; the corresponding relationship function being a corresponding relationship between the node ratio and the positions of nodes in the pipeline to be detected.

2. The method of claim 1, wherein, The relationship model is: ； wherein, is the degree of the blockage, is a calibration constant, is the current flow rate, is the pipe cross-sectional area of the pipe to be detected, is the current rate of change of pressure, is the pressure value, is the time.

3. The method of claim 1, wherein, The corresponding relationship function is determined by the following steps: attaching a standard mass block to different node positions in a standard pipeline to be detected; respectively detecting a standard impedance and a standard frequency corresponding to each node position at different time sequences; based on the standard impedance and the standard frequency, calculating a standard impedance change amount and a standard frequency change amount of adjacent times; calculating a ratio of the standard impedance change amount to the reference impedance to obtain an impedance ratio; calculating a ratio of the standard frequency change amount to the reference frequency to obtain a frequency ratio; calculating a ratio of the impedance ratio to the frequency ratio to obtain the node ratio; fitting the node ratio with the node positions to obtain the corresponding relationship function.

4. The method of claim 3, wherein, The corresponding relationship function is: ； wherein, is the node position, is the current maximum amplitude, is the node ratio.

5. The method of claim 1, wherein, The method further comprises: obtaining a current pressure value of the pipeline to be detected; determining whether the current pressure value exceeds a preset pressure value; in the case where the current pressure value exceeds the preset pressure value, controlling an electromagnetic valve to be opened for a set time, so that the pressure value of the pipeline to be detected is reduced to a preset minimum pressure value; the electromagnetic valve being used to control the working of a negative pressure pump.

6. The method of claim 5, wherein, The set time is obtained by the following steps: obtaining a time weight coefficient, the time weight coefficient being obtained by calculating the pipeline to be detected from a maximum pressure value to a minimum pressure value; determining a first difference between the current pressure value and the preset pressure value; multiplying the time weight coefficient by the first difference to obtain the set time.

7. A blockage detection device, characterized in that The device comprises: a determination module for determining a current pressure change rate and a current flow rate of a pipeline to be detected per unit time; an obtaining module for obtaining a pre-established relationship model, the relationship model being a relationship function between the pressure change rate and the degree of blockage; a judgment module for determining whether the pipeline to be detected is blocked based on the current pressure change rate, the current flow rate and the relationship model; The blockage position determination module is configured to, in a case where it is determined that the to-be-detected pipeline is blocked, acquire a current impedance and a current frequency of the to-be-detected pipeline; determine a current impedance variation and a current frequency variation of the to-be-detected pipeline based on the current impedance and the current frequency; acquire a reference impedance and a reference frequency of the to-be-detected pipeline in a case where there is no blockage; determine a current node ratio based on the current impedance variation, the current frequency variation, the reference impedance, and the reference frequency; and determine a blockage position corresponding to the current node ratio based on a pre-established corresponding relationship function, the corresponding relationship function being a corresponding relationship between a node ratio and positions of nodes in the to-be-detected pipeline.

8. A computer device, comprising: The method comprises: A memory and a processor are communicatively connected, the memory stores computer instructions, and the processor executes the computer instructions to perform the blockage detection method of any one of claims 1-6.

9. A computer-readable storage medium, characterized in that, The computer readable storage medium stores computer instructions for causing the computer to perform the blockage detection method of any one of claims 1-6.

10. A computer program product, characterised in that, The computer readable storage medium stores computer instructions for causing the computer to perform the blockage detection method of any one of claims 1-6.

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