Blockage detection method, fluid conveying device and rotary peristaltic pump

Abstract

The embodiment of the invention provides a blockage detection method, a fluid conveying device and a rotary peristaltic pump, and relates to the technical field of medical treatment, in the fluid conveying device, upper blockage is detected through a pressure sensor arranged on a conveying pipe in the downstream section of a driving mechanism pointing to the infusion direction of an infusion object; the fluid conveying device further comprises a main machine and a conveying pipe mounting channel, a driving mechanism and a pressure sensor are arranged in the main machine, and the conveying pipe mounting channel is used for mounting a conveying pipe. At least part of the driving mechanism is arranged on the conveying pipe mounting channel; at least part of the pressure sensor is arranged on the conveying pipe mounting channel, and the pressure sensor is arranged in a downstream section between the driving mechanism and the outlet end; the blockage detection method is applied to a processor of the fluid conveying device and specifically comprises the following steps: acquiring a pressure signal of a pressure sensor; determining target pressure data according to the pressure signal; and according to the target pressure data, it is determined that the conveying pipe is blocked in the upstream section of the driving mechanism in the infusion direction.

Description

Technical Field

[0001] The present application relates to the field of medical technology, and in particular to an obstruction detection method, a fluid delivery device and a rotary peristaltic pump. Background Art

[0002] A fluid conveying device is a device that can convey fluid. By causing a driving mechanism in the fluid conveying device to squeeze a conveying tube, the fluid in the conveying tube can be caused to flow in a directional manner.

[0003] When the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction pointing to the infusion object, the blocked state can be called upper blockage. When the delivery tube is blocked in the downstream section of the driving mechanism along the infusion direction pointing to the infusion object, the blocked state can be called lower blockage.

[0004] In order to detect whether the delivery tube is blocked from the upper part, the existing solution is to set a pressure sensor in the upstream section of the driving mechanism of the delivery tube along the infusion direction pointing to the infusion object in the fluid delivery device, and detect whether the delivery tube is blocked from the upper part based on the pressure sensor. In order to detect whether the delivery tube is blocked from the lower part, the existing solution is to set a pressure sensor in the downstream section of the driving mechanism of the delivery tube along the infusion direction pointing to the infusion object in the fluid delivery device, and detect whether the delivery tube is blocked from the lower part based on the pressure sensor. Summary of the invention

[0005] The embodiments of the present application provide a blockage detection method, a fluid delivery device, and a rotary peristaltic pump, which can identify whether upper blockage occurs in a delivery tube by means of a pressure sensor disposed in the fluid delivery device in a downstream section of a driving mechanism of the delivery tube along an infusion direction pointing to an infusion object.

[0006] In a first aspect of an embodiment of the present application, a blockage detection method is provided, the method being applied to a processor of a fluid delivery device, the fluid delivery device further comprising a host and a delivery tube installation channel, the host being provided with a driving mechanism and a pressure sensor, the delivery tube installation channel being used to install a delivery tube; at least a portion of the driving mechanism is provided on the delivery tube installation channel, the driving mechanism being used to squeeze the fluid in the delivery tube under the control of the processor so as to move the fluid in an infusion direction, the infusion direction being a direction in the delivery tube pointing to an infusion object; at least a portion of the pressure sensor is provided on the delivery tube installation channel, the pressure sensor being used to detect the pressure of the delivery tube under the control of the processor; the delivery tube installation channel having an inlet end and an outlet end, the inlet end and the outlet end being provided at an upstream section and a downstream section of the driving mechanism respectively along the infusion direction; wherein the pressure sensor is provided in a downstream section between the driving mechanism and the outlet end; the method comprising: obtaining a pressure signal of the pressure sensor; determining target pressure data according to the pressure signal; and determining, according to the target pressure data, that the delivery tube is blocked in an upstream section of the driving mechanism along the infusion direction.

[0007] According to a second aspect of an embodiment of the present application, a fluid delivery device is provided, which includes a main unit and a delivery tube installation channel; a driving mechanism, a pressure sensor and a processor are arranged in the main unit; the delivery tube installation channel is used to install the delivery tube; at least a part of the driving mechanism is arranged on the delivery tube installation channel, and the driving mechanism is used to squeeze the fluid in the delivery tube under the control of the processor so that the fluid moves in an infusion direction, and the infusion direction is a direction in the delivery tube pointing to an infusion object; at least a part of the pressure sensor is arranged on the delivery tube installation channel, and the pressure sensor is used to detect the pressure of the delivery tube under the control of the processor; wherein the delivery tube installation channel has an inlet end and an outlet end, and along the infusion direction, the inlet end and the outlet end are respectively arranged in the upstream section and the downstream section of the driving mechanism, and the pressure sensor is arranged in the downstream section between the driving mechanism and the outlet end; the processor is used to configure and execute the method described in the first aspect above.

[0008] According to a third aspect of an embodiment of the present application, a blockage detection method is provided, which is applied to a fluid delivery device, wherein the fluid delivery device includes a main unit and a delivery tube installation channel, wherein a driving mechanism, a pressure sensor and a processor are disposed in the main unit, and the delivery tube installation channel is used to install a delivery tube; at least a portion of the driving mechanism is disposed on the delivery tube installation channel, and the driving mechanism is used to squeeze the fluid in the delivery tube under the control of the processor so that the fluid moves in an infusion direction, and the infusion direction is a direction in the delivery tube pointing to an infusion object; at least a portion of the pressure sensor is disposed on the delivery tube installation channel, and the pressure sensor is used to detect the pressure of the delivery tube under the control of the processor; the delivery tube installation channel has an inlet end and an outlet end, and along the infusion direction, the The inlet end and the outlet end are respectively arranged in the upstream section and the downstream section of the driving mechanism; wherein the pressure sensor is arranged in the downstream section between the driving mechanism and the outlet end; the method comprises: acquiring a pressure signal of the pressure sensor; obtaining pressure data according to the pressure signal; determining that at least part of the pressure data is greater than or equal to a first pressure threshold; determining that at least part of the pressure data is less than or equal to a second pressure threshold; determining that at least part of the pressure data is greater than or equal to a third pressure threshold, wherein the third pressure threshold is greater than the first pressure threshold; determining that the delivery tube is blocked in the downstream section of the driving mechanism along the infusion direction, or determining that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction; and outputting an alarm message.

[0009] In a fourth aspect of the embodiments of the present application, a rotary peristaltic pump is provided, the rotary peristaltic pump comprising a housing, a power supply, a processor, a rotary drive mechanism, an ultrasonic sensor and a pressure sensor, the housing comprising a mounting panel, the rotary drive mechanism comprising a drive assembly and a roller assembly; at least a portion of the drive assembly is disposed inside the housing, and is respectively connected to the power supply and the processor; at least a portion of the roller assembly is exposed above the mounting panel, and is used for a delivery tube to be sleeved therein, and driven by the drive assembly, drives a plurality of rotors on the roller assembly to be squeezed in sequence, so that the fluid in the delivery tube moves in a directional manner; the The mounting panel is provided with a first pipe groove for accommodating the upstream section of the delivery pipe and a second pipe groove for accommodating the downstream section of the delivery pipe; the ultrasonic sensor is at least partially arranged on the first pipe groove for detecting the flow state in the upstream section of the delivery pipe; the pressure sensor is at least partially arranged on the second pipe groove for detecting the pressure in the downstream section of the delivery pipe; the processor is used to determine the blockage state in the upstream section and the downstream section of the delivery pipe according to the pressure signal of the pressure sensor, or according to the combination of the pressure signal of the pressure sensor and the ultrasonic signal of the ultrasonic sensor.

[0010] The embodiments of the present application provide a blockage detection method, a fluid delivery device, and a rotary peristaltic pump, which can identify whether an upper blockage occurs in the delivery tube by obtaining a pressure signal from a pressure sensor (lower pressure sensor) disposed in the fluid delivery device, in the downstream section of the driving mechanism of the delivery tube along the infusion direction pointing to the infusion object. In some scenarios, during the infusion process, the pressure signal of the lower pressure sensor can also be used to detect the occurrence of an upper blockage in the delivery tube, and the pressure signal can also be used to detect the occurrence of a lower blockage in the delivery tube, thereby realizing the multiplexing of the upper and lower blockage detection functions. For example, in a rotary peristaltic pump, only a lower pressure sensor can be provided, and the upper and lower blockage detection functions can be realized at the same time, which is conducive to reducing the volume of the rotary peristaltic pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 A schematic diagram of the structure of a fluid delivery device provided in an embodiment of the present application;

[0012] Figure 2A A schematic diagram of the structure of a rotary peristaltic pump provided in an embodiment of the present application;

[0013] Figure 2B Another structural schematic diagram of a rotary peristaltic pump provided in an embodiment of the present application;

[0014] Figure 3 A schematic diagram of the structure of a finger-shaped peristaltic pump provided in an embodiment of the present application;

[0015] Figure 4 A flowchart of a blocking detection method provided in an embodiment of the present application;

[0016] Figure 5A-5B A comparison chart of pressure changes when the lower pressure sensor provided in the embodiment of the present application detects upper obstruction in the delivery tube and normal infusion;

[0017] Figure 6 A flowchart of another blocking detection method provided in an embodiment of the present application;

[0018] Figure 7 A flowchart of another blocking detection method provided in an embodiment of the present application;

[0019] Figure 8 A flowchart of another blocking detection method provided in an embodiment of the present application;

[0020] Fig. 9 A comparison chart of pressure changes when the delivery tube is blocked and infused normally as detected by the lower pressure sensor provided in an embodiment of the present application;

[0021] Fig.10 A flowchart of another obstruction detection method provided in an embodiment of the present application. DETAILED DESCRIPTION

[0022] In the description of this application, unless otherwise specified, "plurality" means two or more than two. "At least one of the following" or similar expressions refers to any combination of these items, including any combination of single items or plural items. For example, at least one of a, b, or c can mean: a, b, c, ab, ac, bc, or abc, where a, b, and c can be single or multiple.

[0023] In addition, in order to clearly describe the technical solutions of the embodiments of the present application, in the embodiments of the present application, words such as "first" and "second" are used to distinguish the same items or similar items with substantially the same functions and effects. Those skilled in the art can understand that words such as "first" and "second" do not limit the quantity and execution order, and words such as "first" and "second" do not necessarily limit the difference.

[0024] Meanwhile, in the embodiments of the present application, words such as "exemplary" or "for example" are used to indicate examples, illustrations or descriptions. Any embodiment or design described as "exemplary" or "for example" in the embodiments of the present application should not be interpreted as being more preferred or more advantageous than other embodiments or designs. Specifically, the use of words such as "exemplary" or "for example" is intended to present related concepts in a concrete manner for ease of understanding.

[0025] It is understood that the "embodiment" mentioned throughout the specification means that the specific features, structures or characteristics related to the embodiment are included in at least one embodiment of the present application. Therefore, the various embodiments in the entire specification do not necessarily refer to the same embodiment. In addition, these specific features, structures or characteristics can be combined in one or more embodiments in any suitable manner. It is understood that in various embodiments of the present application, the size of the sequence number of each process does not mean the order of execution, and the execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0026] It can be understood that in the present application, "when", "if" and "if" all mean that corresponding processing will be carried out under certain objective circumstances, but do not limit the time, nor do they require judgment actions when implementing them, nor do they mean the existence of other limitations.

[0027] It can be understood that some optional features in the embodiments of the present application may be implemented independently in certain scenarios without relying on other features, such as the solution on which they are currently based, to solve corresponding technical problems and achieve corresponding effects, or may be combined with other features according to needs in certain scenarios. Accordingly, the devices provided in the embodiments of the present application may also realize these features or functions accordingly, which will not be elaborated here.

[0028] In this application, unless otherwise specified, the same or similar parts between the various embodiments can refer to each other. In the various embodiments in this application, and the various implementation methods in each embodiment, if there is no special description and logical conflict, the terms and / or descriptions between different embodiments and the various implementation methods in each embodiment are consistent and can be referenced to each other. The technical features in different embodiments and the various implementation methods in each embodiment can be combined to form new embodiments, implementation methods, implementation methods, or implementation methods according to their inherent logical relationships. The following implementation methods of this application do not constitute a limitation on the scope of protection of this application.

[0029] A fluid conveying device is a device that can convey fluid. By causing a driving mechanism in the fluid conveying device to squeeze a conveying tube, the fluid in the conveying tube can be caused to flow in a directional manner.

[0030] When the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction toward the infusion subject, the blocked state is referred to herein as upper blockage.

[0031] When the delivery tube is blocked in the downstream section of the driving mechanism along the infusion direction toward the infusion subject, the blocked state is referred to herein as lower blockage.

[0032] The fluid may be a nutrient solution or a medicinal solution; of course, the fluid may also be other flowing objects, and the embodiments of the present application do not impose specific limitations on this.

[0033] The infusion object can be a human or an animal; of course, the infusion object can also be other objects, and the embodiments of the present application do not impose specific limitations on this.

[0034] In order to detect whether the delivery tube is blocked from the upper part, in the existing fluid delivery device, a pressure sensor (also called an upper pressure sensor) is arranged in the delivery tube installation channel, along the upstream section of the driving mechanism in the infusion direction, and the pressure signal of the upper pressure sensor is used to detect whether the delivery tube is blocked from the upper part. However, in some cases, for example, when there is not enough space or a suitable position in the fluid delivery device to install the above-mentioned pressure sensor in the upstream section of the driving mechanism, how to detect the upper blockage becomes an urgent problem to be solved. Therefore, the embodiment of the present application provides a blockage detection method, which can be applied to the processor in the fluid delivery device.

[0035] Figure 1 A schematic diagram of the structure of a fluid delivery device provided in an embodiment of the present application is shown in FIG. Figure 1 As shown, the fluid delivery device 10 includes a main body 11 and a delivery pipe installation channel ( Figure 1 The main unit is provided with a driving mechanism 12, a pressure sensor 13 and a processor 15, and the delivery tube installation channel is used to install the delivery tube. In some embodiments, the fluid delivery device further includes an ultrasonic sensor 14. In some embodiments, the fluid delivery device 10 can be a rotary peristaltic pump or a finger peristaltic pump.

[0036] At least a portion of the drive mechanism 12 is disposed on the delivery tube installation channel. The drive mechanism is used to squeeze the fluid in the delivery tube under the control of the processor 15 to move the fluid in the infusion direction, which is the direction in the delivery tube pointing to the infusion object. At least a portion of the drive mechanism 12 is disposed on the delivery tube installation channel means that the drive mechanism has at least a portion in contact with the delivery tube, and the portion is disposed on the delivery tube installation channel, for example Figure 2A-2B The roller assembly 27, for example Figure 3 The finger assembly 321, and the other parts of the driving mechanism except the part in contact with the delivery pipe can be installed in the main machine, or the driving mechanism can also be completely arranged on the delivery pipe installation channel.

[0037] like Figure 2A-2BThe driving mechanism is a rotary driving mechanism 22. The driving components in the rotary driving mechanism 22 include a driving motor and a transmission mechanism thereof. The driving motor and its transmission mechanism are at least partially arranged inside the housing 21. The driving motor is connected to a power source and a processor, respectively. At least a portion of the roller assembly 27 of the rotary driving mechanism 22 is exposed above the mounting panel, so that the conveying pipe is sleeved therein, and driven by the driving motor, a plurality of rotors 271 on the roller assembly 27 are driven to squeeze in sequence, so that the fluid in the conveying pipe moves in a directional manner.

[0038] Combination Figure 3 The driving mechanism is a finger-shaped driving mechanism 32, which includes a driving component and multiple finger-shaped components 321. The driving component includes a driving motor and its transmission mechanism. Under the control of the processor, the driving motor can make the multiple finger-shaped components 321 squeeze the delivery tube in a preset order to make the fluid in the delivery tube move in a directional manner.

[0039] The driving motor may work continuously and uninterruptedly, or the driving motor may work periodically.

[0040] At least a portion of the pressure sensor 13 is disposed on the delivery pipe installation channel, and the pressure sensor 13 is used to detect the pressure of the delivery pipe under the control of the processor 15. The pressure sensor 13 has a pressure detection surface, and at least a portion of the pressure sensor 13 is disposed on the delivery pipe installation channel, which means that at least the pressure detection surface of the pressure sensor 13 is disposed on the delivery pipe installation channel, and other parts of the pressure sensor except the pressure detection surface can be installed in the host 11, or can be fully exposed on the delivery pipe installation channel. In some embodiments, the pressure sensor 13 can be a chip-type pressure sensor, a resistive pressure sensor, a capacitive pressure sensor, etc.

[0041] by Figure 2A-2B For example, the delivery tube installation channel 290 has an inlet end 291 and an outlet end 292. Along the infusion direction, the inlet end 291 and the outlet end 292 are respectively arranged in the upstream section and downstream section of the rotating drive mechanism 22 (the roller assembly 27 is shown in the figure); wherein the pressure sensor 24 is arranged in the downstream section between the rotating drive mechanism 22 and the outlet end 292.

[0042] The processor 15 is used to execute the blockage detection method provided in the embodiment of the present application to determine the blockage status in the upstream section and / or downstream section of the conveying pipe.

[0043] In some embodiments, Figure 1 As shown, the fluid delivery device 10 further includes an ultrasonic sensor 14 for detecting the flow state in the delivery pipe under the control of the processor 15, wherein the flow state includes an abnormal state or a normal state. Figure 2A-2BAs shown, the ultrasonic sensor 23 can be arranged in the upstream section between the rotary drive mechanism 22 (the roller assembly 27 is shown in the figure) and the inlet end 291, and at least partially arranged in the first tube groove 25. Specifically, the ultrasonic sensor 23 has an ultrasonic transmitting end and an ultrasonic receiving end. The ultrasonic sensor 23 is at least partially arranged in the first tube groove 25, which means that at least one of the ultrasonic transmitting end and the ultrasonic receiving end of the ultrasonic sensor 23 is arranged in the first tube groove 25. The components of the ultrasonic sensor other than the ultrasonic transmitting end and the ultrasonic receiving end can be arranged inside the housing 21; or the ultrasonic sensor 23 can also be completely arranged in the first tube groove 25.

[0044] In some embodiments, Figure 3 As shown, the ultrasonic sensor 14 can also be arranged in the downstream section between the finger drive mechanism 32 (the finger assembly 321 is shown in the figure) and the outlet end 392 according to the needs of bubble detection.

[0045] Specifically, the fluid state is described by taking the ultrasonic sensor disposed in the upstream section of the driving mechanism as an example. Figure 2A-2B As shown, at least part of the ultrasonic sensor 23 is arranged on the first tube groove 25. When there are bubbles or blockages in the upstream section of the rotary drive mechanism 22 of the delivery pipe, the attenuation rate of the ultrasonic signal of the ultrasonic sensor 23 will be greater than the preset rate threshold, or, when the preset time period is reached, the attenuation amplitude of the ultrasonic signal of the ultrasonic sensor 23 will be greater than the preset amplitude threshold, and the flow state of the delivery pipe is considered to be abnormal. When there are no bubbles or blockages in the upstream section of the rotary drive mechanism 22 of the delivery pipe, the attenuation of the ultrasonic signal of the ultrasonic sensor 23 will be relatively slow, for example, the attenuation rate of the ultrasonic signal will usually be less than the preset rate threshold, or, when the preset time period is reached, the attenuation amplitude of the ultrasonic signal will be less than the preset amplitude threshold, and the flow state of the delivery pipe is considered to be normal.

[0046] Figure 2A A schematic diagram showing the structure of a rotary peristaltic pump when a delivery tube consumable is installed. Figure 2B The schematic diagram shows the structure of the rotary peristaltic pump when the conveying tube consumables are not installed. Figure 2A-2B As shown, the delivery tube consumable 26 is installed on the rotary peristaltic pump 20. The rotary peristaltic pump 20 includes a housing 21, and a processor ( Figure 2A The drive assembly (not shown) of the rotary drive mechanism 22 Figure 2AThe housing 21 includes a mounting panel 29 for mounting the delivery tube consumable 28. The mounting panel 29 includes a delivery tube mounting channel 290 (shown by dashed lines). The two ends of the delivery tube mounting channel 22 are an inlet end 291 and an outlet end 292. Along the delivery tube mounting channel 22, a first tube groove 25 is provided near the inlet end 291, and a second tube groove 26 is provided near the outlet end 292. The rotation drive mechanism 22 includes a drive assembly and a roller assembly 27, and the roller assembly 27 is exposed on the mounting panel 29.

[0047] Figure 2A-2B It is shown that an ultrasonic sensor 23 is disposed in the first tube groove 25, and a pressure sensor 24 is disposed in the second tube groove 26. In some embodiments, a pressure sensor may be disposed in the first tube groove 25, or a pressure sensor and an ultrasonic sensor may be disposed at the same time; an ultrasonic sensor may be disposed in the second tube groove 26, or a pressure sensor and an ultrasonic sensor may be disposed at the same time.

[0048] Figure 3 A schematic diagram of the structure of a finger-shaped peristaltic pump is shown in FIG. Figure 3 As shown, the finger-shaped peristaltic pump 30 includes a pump body 31, a finger-shaped driving mechanism 32, a pressure sensor 33 (upper pressure sensor) arranged in the upstream section of the delivery pipe, an ultrasonic sensor 34 and a pressure sensor 35 (lower pressure sensor) arranged in the downstream section of the delivery pipe, and a processor ( Figure 3 (not shown), a delivery pipe installation channel 390 is provided in the pump body 31, and the finger-shaped driving mechanism 32 includes a driving assembly and a finger-shaped assembly 321.

[0049] Figure 5A-5B FIG. 2 is a schematic diagram showing the pressure data detected by the pressure sensor (also called the lower pressure sensor) disposed in the downstream section of the delivery pipe when the delivery pipe is in the upper blockage state. Figure 5A-5BAs shown, the pressure data shows regular fluctuations. Hereinafter, the pressure sensor detection area is referred to as section A, and the area between the driving mechanism and the blockage point in the upstream area of ​​the delivery tube is section B, which is explained in conjunction with a single regular waveform as a schematic diagram. When the upstream section of the delivery tube is blocked (also known as upper blockage), the fluid in section B will be transported to section A and its downstream section as the driving mechanism continues to squeeze, but the fluid upstream of section B cannot be replenished due to the blockage. Therefore, the delivery tube will be in a deflated state in section B, and the internal pressure will be lower than the pressure during normal infusion; and as the driving mechanism continues to squeeze, the fluid is continuously squeezed into section A. At this time, the delivery tube will be in a filled state in section A, and its internal pressure will increase relative to the pressure during normal infusion. It can be seen that during this process, the pressure in section B is less than that in section A. During the operation of the driving mechanism, the rotors 271 or the fingers 321 alternately abut against the delivery tube. During the switching of the rotors 271 or the fingers 321, there will be a moment when the A section and the B section are connected to each other. During this moment, due to the pressure difference between the two, the fluid in the A section will quickly flow back to the B section, so that the pressure in the A section is instantly released. Therefore, when the delivery tube is blocked, the pressure data detected by the lower pressure sensor will fluctuate rapidly from a high pressure value higher than the normal infusion to a low pressure value lower than the normal infusion.

[0050] like Figure 5A-5B As shown, when the delivery tube is in normal infusion, its pressure change can refer to the pressure data in the red part, and the pressure data in the red part floats and changes between the two auxiliary reference pressure values ​​(within the reference pressure range). Specifically, the reference pressure value and the reference pressure range are respectively used to characterize the data value or the corresponding data range corresponding to the pressure data of the delivery tube in the normal infusion state. When the delivery tube is in normal infusion, with the continuous squeezing of the driving mechanism, the fluid in the upstream area of ​​the delivery tube is continuously squeezed toward the downstream area, and the upstream area continues to have fluid to be replenished, and the fluid in the downstream area also continues to flow to the downstream area. At the moment when section A and section B are connected to each other, at this time, due to the small pressure difference between the upstream area and the downstream area, the pressure change amplitude after connection is also relatively small.

[0051] like Figure 5A-5BAs shown, when the delivery tube is blocked from above, its pressure change can be seen in the blue pressure data. The blue pressure data can be divided into two parts relative to the auxiliary zero value line, the positive pressure value and the reverse pressure value. Specifically, the zero value line is a numerical line corresponding to the pressure data of the delivery tube under normal infusion state, and the positive pressure value is the pressure data above the zero value line (a set of pressure values ​​greater than the zero value line), and the reverse pressure value is the pressure data below the zero value line (a set of pressure values ​​less than the zero value line).

[0052] Figure 4 Schematic diagram of a flow chart of a blockage detection method provided in an embodiment of the present application, the method is applied to the processor 15 in the above-mentioned fluid delivery device 10, such as Figure 4 As shown, the blocking detection method specifically includes:

[0053] S401, obtaining a pressure signal from a pressure sensor.

[0054] The pressure sensor (also called lower pressure sensor) in this embodiment is arranged in the downstream section of the driving mechanism, and can be specifically arranged in the delivery pipe installation pipeline between the driving mechanism and the outlet end.

[0055] The pressure sensor collects a pressure signal in each sampling period within at least a portion of the time period when the drive motor is working, and sends the pressure signal to the processor. Accordingly, the processor receives the pressure signal from the pressure sensor. In some embodiments, the processor continuously obtains the pressure signal of the pressure sensor after the fluid conveying device is turned on. In some embodiments, the processor obtains the pressure signal of the pressure sensor only during at least a portion of the time period when the drive motor is working. For example, at least a portion of the time period when the drive motor is working can be the first half of the time period when the drive motor is working, or it can also be the second half of the time when the drive motor is working, and of course, it can also be a time period of any length when the drive motor is working. Since the pressure of the delivery pipe changes when the drive motor is working, obtaining the pressure signal of the pressure sensor during at least a portion of the time period when the drive motor is working can reduce the working time of the pressure sensor and save energy of the fluid conveying device.

[0056] S402: Determine target pressure data according to the pressure signal.

[0057] After receiving the pressure signal, the processor will perform signal processing on the pressure signal, such as filtering, amplification and conversion, to obtain pressure data, and then obtain the target pressure data required for this step based on the pressure data.

[0058] In some embodiments, the processor determines the minimum pressure value and the maximum pressure value of at least one time period according to the pressure data. It can be understood that the minimum pressure value and the maximum pressure value in this time period are the target pressure data.

[0059] In some embodiments, the processor determines the variance or standard deviation of the positive pressure value in at least one time period and the minimum pressure value in the time period based on the pressure data. It can be understood that the variance or standard deviation of the positive pressure value in this time period and the minimum pressure value are the target pressure data.

[0060] In some embodiments, the processor determines the variance or standard deviation of the forward pressure value in at least one time period and the variance or standard deviation of the reverse pressure value in the time period based on the pressure data. It is understandable that the variance or standard deviation of the forward pressure value in this time period and the variance or standard deviation of the reverse pressure value are the target pressure data.

[0061] In some embodiments, the processor determines a set of partial pressure values ​​in the forward pressure values ​​within at least one time period, or the variance or standard deviation of the set, based on the pressure data. For example, the set of partial pressure values ​​may be a set of pressure values ​​greater than or equal to the first pressure threshold; and determines a set of partial pressure values ​​in the reverse pressure values ​​within at least one time period, or the variance or standard deviation of the set. For example, the set of partial pressure values ​​may be a set of pressure values ​​less than or equal to the second pressure threshold. It can be understood that the set of pressure values ​​exceeding the first pressure threshold and the set of pressure values ​​below the second pressure threshold within this time period are the target pressure data. The first pressure threshold and the second pressure threshold are both determined based on a reference pressure value or a reference pressure range, and the reference pressure value and the reference pressure range are respectively used to characterize the data value or the corresponding data range corresponding to the pressure data under the normal infusion state of the delivery tube.

[0062] S403: According to the target pressure data, determine whether the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction.

[0063] The processor determines, based on the target pressure data, that there is first target pressure data in the target pressure data, and the first target pressure data is target pressure data greater than or equal to a first pressure threshold; based on the target pressure data, the processor determines second target pressure data in the target pressure data, and the second target pressure data is target pressure data less than or equal to a second pressure threshold; based on the first target pressure data and the second target pressure data, if the first target pressure data and the second target pressure data exist at the same time, it can be determined that upper blockage occurs in the delivery pipe.

[0064] The first pressure threshold and the second pressure threshold are both determined according to a reference pressure value or a reference pressure range, and the reference pressure value and the reference pressure range are respectively used to characterize the corresponding data value or the corresponding data range under the normal infusion state of the delivery tube.

[0065] Specifically, the processor may determine the existence of the first target pressure data and the second target pressure data in any order. In some embodiments, the processor may also make judgments based on the target pressure data of multiple time periods, and determine that the upper blockage of the delivery pipe occurs after determining that the target pressure data of multiple time periods all contain the first target pressure data and the second target pressure data.

[0066] In some embodiments, the target pressure data includes a minimum pressure value and a maximum pressure value within a single time period. The processor accordingly pre-sets a first pressure threshold and a second pressure threshold that are related to the reference pressure value or the reference pressure range and are related to the pressure amplitude. When the processor determines that the maximum pressure value is greater than or equal to the first pressure threshold and the minimum pressure value is less than or equal to the second pressure threshold, it can be determined that the first target pressure data and the second target pressure data exist at the same time, and then it is determined that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction.

[0067] In some embodiments, the target pressure data includes the variance or standard deviation of the forward pressure value within a single time period, and the minimum pressure value within the time period. For example, the processor accordingly pre-sets a first pressure threshold value related to the reference pressure value or reference pressure range, and the variance or standard deviation of the forward pressure value, and a second pressure threshold value related to the pressure amplitude. When the processor determines that the variance or standard deviation of the forward pressure value is greater than or equal to the first pressure threshold value, and the minimum pressure value is less than or equal to the second pressure threshold value, it can be determined that the first target pressure data and the second target pressure data exist at the same time, and then determines that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction.

[0068] In some embodiments, the target pressure data includes the variance or standard deviation of the forward pressure value in a single time period, and the variance or standard deviation of the reverse pressure value in the time period. For example, the processor accordingly pre-sets a first pressure threshold value related to the reference pressure value or reference pressure range and the variance or standard deviation of the forward pressure value, and a second pressure threshold value related to the variance or standard deviation of the reverse pressure value. When the processor determines that the variance or standard deviation of the forward pressure value is greater than or equal to the first pressure threshold value, and the variance or standard deviation of the reverse pressure value is less than or equal to the second pressure threshold value, it can be determined that the first target pressure data and the second target pressure data exist at the same time, and then it is determined that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction.

[0069] When the delivery pipe is blocked, the target pressure data detected by the pressure sensor in the downstream section of the delivery pipe will appear as follows: Figure 5A-5B The upper blocking state shown in the figure, therefore, in order to implement step S403, Figure 6A flowchart of a blocking detection method is shown, which specifically includes:

[0070] S601. Determine, according to the target pressure data, whether first target pressure data in the target pressure data is greater than or equal to a first pressure threshold.

[0071] The processor compares the target pressure data within a set time period (also called a judgment period) with a first pressure threshold. If the target pressure data is greater than or equal to the first pressure threshold, it is determined that the target pressure data for the time period contains the first target pressure data; if all the target pressure data within the time period are less than the first pressure threshold, it is determined that the target pressure data does not contain the first target pressure data.

[0072] Specifically, the first pressure threshold may be determined according to a reference pressure value or a reference pressure range, and the reference pressure value and the reference pressure range are respectively used to characterize a data value or a data range corresponding to a normal infusion state of the delivery tube.

[0073] In some embodiments, the processor may repeatedly determine in a plurality of time periods whether the first target pressure data exists in the plurality of time periods.

[0074] S602: Determine, according to the target pressure data, whether second target pressure data in the target pressure data is less than or equal to a second pressure threshold.

[0075] The processor compares the target pressure data within the set time period with the second pressure threshold value. If the target pressure data is less than or equal to the second pressure threshold value, it is determined that the target pressure data for the time period has the second target pressure data; if all the target pressure data within the time period are greater than the second pressure threshold value, it is determined that the target pressure data does not have the second target pressure data.

[0076] Specifically, the second pressure threshold is determined according to a reference pressure value or a reference pressure range, and the reference pressure value and the reference pressure range are respectively used to characterize a data value or a corresponding data range corresponding to the target pressure data under a normal infusion state of the delivery tube.

[0077] In some embodiments, the processor may repeatedly determine in a plurality of time periods whether the second target pressure data exists in the plurality of time periods.

[0078] It should be noted that the processor may execute S601 first and then execute S602, or the processor may execute S602 first and then execute S601, or the processor may execute S601 and S602 in parallel.

[0079] S603: Determine, based on the first target pressure data and the second target pressure data, whether the delivery tube is blocked in an upstream section of the drive mechanism along the infusion direction.

[0080] The target pressure data processor determines within a preset time period that the first target pressure data and the second target pressure data exist in the target pressure data within the time period, and then determines that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction. It can be understood that if the preset time period is divided into smaller parts, the first target pressure data and the second target pressure data may also exist in adjacent or several adjacent time periods.

[0081] In some embodiments, the fluid delivery device further includes an ultrasonic sensor, which is specifically disposed in an upstream section between the driving mechanism and the inlet end, for example Figure 2A-2B As shown, the processor obtains the ultrasonic signal of the ultrasonic sensor and combines it with the pressure signal of the lower pressure sensor to identify the upper blockage of the delivery pipe, such as Figure 7 A flow chart of another blocking detection method is shown, which is as follows:

[0082] S701. Determine, based on an ultrasonic signal from an ultrasonic sensor, that a flow state in a delivery pipe is abnormal.

[0083] The processor acquires an ultrasonic signal from the ultrasonic sensor; determines ultrasonic data according to the ultrasonic signal; and determines that the flow state in the delivery pipe is an abnormal state according to the ultrasonic data. Specifically, the abnormal state may be caused by bubbles in the delivery pipe or by a blockage in the delivery pipe.

[0084] In some embodiments, the processor may control the ultrasonic sensor to acquire ultrasonic signals during at least a portion of the time period when the drive motor is operating.

[0085] In some embodiments, compared to the normal flow state in the delivery pipe, when an abnormal state such as upper blockage or bubbles exists in the delivery pipe, the ultrasonic data of the ultrasonic sensor will be greatly attenuated. Therefore, the processor can obtain the ultrasonic data after data processing based on the ultrasonic signal collected by the ultrasonic sensor, and then obtain the attenuation rate of the ultrasonic signal or the attenuation amplitude of the ultrasonic signal in a preset time segment based on the ultrasonic data. Specifically, the processor can determine whether the attenuation rate of the ultrasonic signal is greater than the preset rate threshold. If so, it is determined that the flow state in the delivery pipe is an abnormal state, and if not, it is determined that the flow state in the delivery pipe is a normal state. Alternatively, the processor determines the attenuation amplitude of the ultrasonic signal when the preset time period is reached based on the ultrasonic signal. Alternatively, the processor can determine whether the attenuation amplitude in the preset time segment is greater than the preset amplitude threshold. If so, it is determined that the flow state in the delivery pipe is an abnormal state, and if not, it is determined that the flow state in the delivery pipe is a normal state.

[0086] S702. Determine, based on the target pressure data, that the first target pressure data in the target pressure data is greater than or equal to the first pressure threshold, and / or determine, based on the target pressure data, that the second target pressure data in the target pressure data is less than or equal to the second pressure threshold, and determine that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction.

[0087] When there is an abnormal state in the delivery pipe, it may be caused by either blockage or the presence of bubbles, and the ultrasonic signal will be greatly attenuated. Therefore, it is not clear through step S701 whether the delivery pipe is blocked or there are bubbles in the delivery pipe. However, when there are bubbles in the delivery pipe, the pressure of the delivery pipe will not change significantly. Therefore, through the combination of steps S701 and S702, it can be clearly identified that the delivery pipe is blocked.

[0088] In some embodiments, when the processor determines, based on the pressure data, that there is first target pressure data greater than or equal to the first pressure threshold value among the target pressure data within at least one time period, it can be determined that the pressure of the delivery tube has changed significantly, and further combined with the judgment result obtained in step S701 that the delivery tube is in an abnormal state, it can be determined that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction. The first pressure threshold value is determined based on a reference pressure value or a reference pressure range, and the reference pressure value and the reference pressure range are respectively used to characterize the data value or the corresponding data range corresponding to the target pressure data of the delivery tube under the normal infusion state.

[0089] In some embodiments, when the processor determines, based on the pressure data, that the target pressure data within at least one time period includes first target pressure data greater than or equal to a first pressure threshold, and determines that the target pressure data within the time period includes second target pressure data less than or equal to a second pressure threshold, it can be determined that the pressure of the delivery tube has changed significantly. Further combined with the judgment result obtained in step S701 that the delivery tube is in an abnormal state, it can be determined that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction.

[0090] It should be noted that the processor may execute S701 first and then execute S702, or the processor may execute S702 first and then execute S701, or the processor may execute S701 and S702 in parallel.

[0091] In some embodiments, based on the fact that the pressure sensor is arranged in the downstream section of the driving mechanism (also called the lower pressure sensor), specifically, it can be arranged in the installation pipeline of the delivery tube between the driving mechanism and the outlet end, the upper blockage and the lower blockage during the infusion process can be identified by the pressure signal of the lower pressure sensor. Figure 8 A flowchart of another blocking detection method is shown, which specifically includes the following:

[0092] S801. In the first time period of the infusion process, according to the target pressure data, it is determined that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction (also called upper blockage).

[0093] The first time period is any time period during the infusion process of the fluid delivery device, representing a time period during which the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction.

[0094] Specifically, the processor determines the manner in which the delivery tube is blocked in the upstream section of the drive mechanism along the infusion direction according to the target pressure data, and the operations of steps S401 to S403 may be referred to.

[0095] S802. In a second time period during the infusion process, based on the target pressure data, determine that the delivery tube is blocked in a downstream section of the driving mechanism along the infusion method (also called lower blockage).

[0096] The second time period is any time period during the infusion process of the fluid delivery device, representing the time period during which the delivery tube is blocked in the downstream section of the drive mechanism along the infusion direction. It is understandable that during the infusion process, the second time period may also be different from the first time period; but when the delivery tube is blocked simultaneously in the upstream section and the downstream section of the drive mechanism along the infusion direction, the second time period may also overlap at least partially with the first time period.

[0097] The processor determines whether at least part of the target pressure data is greater than or equal to a third pressure threshold. If so, it determines that the delivery tube is blocked in the downstream section of the driving mechanism along the infusion direction. If not, it determines that the delivery tube is not blocked in the downstream section of the driving mechanism along the infusion direction.

[0098] Specifically, the processor can obtain the pressure signal of the pressure sensor according to the operation mode of steps S401 and S402, and obtain the corresponding pressure data. In some embodiments, the processor can directly use the pressure data after signal processing as the target pressure data, and determine that at least one target pressure data is greater than or equal to the third pressure threshold according to the target pressure data, and then determine whether the delivery tube is blocked in the downstream section of the driving mechanism along the infusion direction, wherein the third pressure threshold is determined according to the empirical value of the downstream section blocking pressure. Specifically, the third pressure threshold is greater than the first pressure threshold.

[0099] In some embodiments, the processor may also determine the variance or standard deviation of the pressure data based on the pressure data to use as the target pressure data for determination.

[0100] In some embodiments, the delivery tube may be blocked simultaneously in the downstream section of the driving mechanism along the infusion method, and in the upstream section of the driving mechanism along the infusion method. At this time, since the blockage of the delivery tube in the downstream section of the driving mechanism along the infusion method will cause the pressure signal detected by the pressure sensor to change more significantly, the lower blockage can be identified preferentially.

[0101] Fig. 9 A schematic diagram of pressure when the delivery tube is blocked in the downstream section of the driving mechanism of the infusion method is shown. Compared with the normal infusion of the delivery tube, when the delivery tube is blocked, the fluid cannot flow normally. With the squeezing of the driving device, the fluid in the downstream section of the driving mechanism of the delivery tube along the infusion direction pointing to the infusion object gradually increases, and the pressure of the delivery tube gradually increases. Therefore, the third pressure threshold is set according to the empirical value of the pressure of blockage in the downstream section of the delivery tube. When the processor determines that the target pressure data is greater than or equal to the third pressure threshold, it can be determined that the delivery tube is blocked in the downstream section of the driving mechanism of the infusion method.

[0102] In some embodiments, the pressure sensor is arranged in the downstream section of the driving mechanism (lower pressure sensor), and specifically can be arranged in the delivery pipe installation pipeline between the driving mechanism and the outlet end. Fig.10 A flowchart of another blocking detection method provided in an embodiment of the present application specifically includes:

[0103] S1001. Obtain a pressure signal from a pressure sensor.

[0104] The processor obtains the pressure signal of the pressure sensor, which can be performed by referring to the operation method of the above step S401.

[0105] S1002. Obtain pressure data according to the pressure signal.

[0106] The processor may refer to the operation method of the above step S402 to perform signal processing on the pressure signal according to the pressure signal collected by the pressure sensor to obtain corresponding pressure data.

[0107] S1003: Determine whether at least part of the pressure data is greater than or equal to a first pressure threshold.

[0108] The processor determines the target pressure data (e.g., the maximum pressure value) from the pressure data, and determines whether the target pressure data is greater than or equal to the first pressure threshold. If so, it is determined that the first pressure data exists in the pressure data; if not, it is determined that the first pressure data does not exist in the pressure data. In some embodiments, it is possible to repeatedly determine whether multiple target pressure data are greater than or equal to the first pressure threshold, which is conducive to more accurate determination results.

[0109] In some embodiments, the processor may compare pressure data one by one to see whether they are greater than or equal to a first pressure threshold, and determine that the pressure data contains first pressure data when at least some of the pressure data are greater than or equal to the first pressure threshold.

[0110] S1004: Determine whether at least part of the pressure data is less than or equal to a second pressure threshold.

[0111] The processor determines the target pressure data (e.g., the minimum pressure value) from the pressure data, and compares the target pressure data with the second pressure threshold. If the target pressure data is less than or equal to the second pressure threshold, it is determined that the second pressure data exists in the pressure data; if the target pressure data is greater than the second pressure threshold, it is determined that the second pressure data does not exist in the pressure data. In some embodiments, it is possible to repeatedly determine whether multiple target pressure data are less than or equal to the second pressure threshold, which is conducive to more accurate determination results.

[0112] In some embodiments, the processor may compare the pressure data one by one to see whether they are less than or equal to the second pressure threshold, and determine that the second pressure data exists in the pressure data when at least some of the pressure data are less than or equal to the second pressure threshold.

[0113] Specifically, the processor may execute S1003 first and then execute S1004, or the processor may execute S1004 first and then execute S1003, or the processor may execute S1003 and S1004 simultaneously.

[0114] S1005: Determine whether at least part of the target pressure data is greater than or equal to a third pressure threshold.

[0115] The third pressure threshold may be set to be greater than the first pressure threshold.

[0116] The processor determines the target pressure data (e.g., the maximum pressure value) from the pressure data, and compares the target pressure data with the third pressure threshold. If the target pressure data is greater than or equal to the third pressure threshold, it is determined that the third pressure data exists in the pressure data; if the target pressure data is less than the third pressure threshold, it is determined that the third pressure data does not exist in the pressure data. In some embodiments, it is possible to repeatedly determine whether multiple target pressure data are greater than or equal to the third pressure threshold, which is conducive to more accurate determination results.

[0117] In some embodiments, the processor may also compare the pressure data one by one to see whether it is greater than or equal to the third pressure threshold, and when at least part of the pressure data is greater than or equal to the third pressure threshold, it is determined that the third pressure data exists in the pressure data.

[0118] Specifically, the processor may execute S1003, S1004 and S1005 in sequence, or the processor may execute S1003, S1004 and S1005 simultaneously.

[0119] S1006: Determine whether the delivery tube is blocked in a downstream section of the driving mechanism along the infusion direction, or determine whether the delivery tube is blocked in an upstream section of the driving mechanism along the infusion direction.

[0120] Specifically, if at least part of the pressure data exists and is greater than or equal to the third pressure threshold, and at least part of the pressure data does not exist and is less than or equal to the second pressure threshold, it is determined that the delivery tube is blocked in the downstream section of the driving mechanism along the infusion direction. If at least part of the pressure data exists and is greater than or equal to the first pressure threshold, and at least part of the pressure data exists and is less than or equal to the second pressure threshold, it is determined that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction.

[0121] According to the determination results of the above steps S1003, S1004 and S1005, the processor determines that the delivery tube is blocked in the downstream section of the driving mechanism along the infusion direction when only at least part of the pressure data is greater than or equal to the third pressure threshold, that is, the third pressure data exists, but the first pressure data and the second pressure data do not exist. When at least part of the pressure data is greater than or equal to the first pressure threshold, and at least part of the pressure data is less than or equal to the second pressure threshold, that is, the first pressure data and the second pressure data exist, but the third pressure data does not exist, it is determined that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction.

[0122] S1007. Output alarm information.

[0123] Based on step S1006, when the processor determines that the delivery tube is blocked in the downstream section of the driving mechanism along the infusion direction, the processor outputs an alarm message indicating that the delivery tube is blocked in the downstream section of the driving mechanism along the infusion direction; when the processor determines that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction, the processor outputs an alarm message indicating that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction.

[0124] The alarm information may be displayed on a screen, or may be broadcasted by sound, or may be alerted by an indicator light.

[0125] Although the present application is described herein in conjunction with various embodiments, in the process of implementing the present application for which protection is claimed, those skilled in the art may understand and implement other variations of the disclosed embodiments by viewing the drawings, the disclosure, and the appended claims. In the claims, the word "comprising" does not exclude other components or steps, and "one" or "an" does not exclude multiple situations. A single processor 15 or other unit may implement several functions listed in the claims. Certain measures are recorded in different dependent claims, but this does not mean that these measures cannot be combined to produce good results.

[0126] Although the present application has been described in conjunction with specific features and embodiments thereof, it is obvious that various modifications and combinations may be made thereto without departing from the spirit and scope of the present application. Accordingly, this specification and the drawings are merely exemplary illustrations of the present application as defined by the appended claims, and are deemed to have covered any and all modifications, variations, combinations or equivalents within the scope of the present application. Obviously, those skilled in the art may make various modifications and variations to the present application without departing from the spirit and scope of the present application. Thus, if these modifications and variations of the present application fall within the scope of the claims of the present application and their equivalents, the present application is also intended to include these modifications and variations.

Claims

1. A blocking detection method, characterized in that: The method is applied to a processor of a fluid delivery device, wherein the fluid delivery device further comprises a host and a delivery tube installation channel, wherein a driving mechanism and a pressure sensor are arranged in the host, and the delivery tube installation channel is used to install the delivery tube; at least a part of the driving mechanism is arranged on the delivery tube installation channel, and the driving mechanism is used to squeeze the fluid in the delivery tube under the control of the processor so that the fluid moves in an infusion direction, and the infusion direction is a direction in the delivery tube pointing to an infusion object; at least a part of the pressure sensor is arranged on the delivery tube installation channel, and the pressure sensor is used to detect the pressure of the delivery tube under the control of the processor; the delivery tube installation channel has an inlet end and an outlet end, and along the infusion direction, the inlet end and the outlet end are arranged in an upstream section and a downstream section of the driving mechanism respectively; wherein the pressure sensor is arranged in a downstream section between the driving mechanism and the outlet end; The method comprises: Acquiring a pressure signal from the pressure sensor; determining target pressure data according to the pressure signal; According to the target pressure data, it is determined that the delivery tube is blocked in an upstream section of the drive mechanism along the infusion direction.

2. The method according to claim 1, characterized in that The target pressure data includes a forward pressure value and a reverse pressure value; At least some of the positive pressure values ​​are greater than or equal to a first pressure threshold, and at least some of the reverse pressure values ​​are less than or equal to a second pressure threshold; Among them, the first pressure threshold and the second pressure threshold are both determined according to a reference pressure value or a reference pressure range, and the reference pressure value and the reference pressure range are respectively used to characterize the data value or the corresponding data range corresponding to the pressure data of the delivery tube under a normal infusion state.

3. The method according to claim 1, characterized in that The step of determining, based on the target pressure data, that the delivery tube is blocked in an upstream section of the drive mechanism along the infusion direction comprises: Determining, according to the target pressure data, that first target pressure data in the target pressure data is greater than or equal to a first pressure threshold; Determining, according to the target pressure data, that second target pressure data in the target pressure data is less than or equal to a second pressure threshold; According to the first target pressure data and the target second pressure data, it is determined that the delivery tube is blocked in the upstream section of the driving mechanism along the infusion direction, wherein the first pressure threshold and the second pressure threshold are both determined based on a reference pressure value or a reference pressure range, and the reference pressure value and the reference pressure range are respectively used to characterize the data value or the corresponding data range corresponding to the pressure data of the delivery tube under a normal infusion state.

4. The method according to claim 1, characterized in that: The fluid delivery device further comprises an ultrasonic sensor for detecting a flow state in the delivery pipe under the control of the processor, wherein the flow state comprises an abnormal state or a normal state, and the ultrasonic sensor is disposed in an upstream section between the drive mechanism and the inlet end; The step of determining, based on the target pressure data, that the delivery tube is blocked in an upstream section of the drive mechanism along the infusion direction comprises: Determining, based on the ultrasonic signal of the ultrasonic sensor, that the flow state in the delivery pipe is an abnormal state; Determining, according to the target pressure data, that first target pressure data in the target pressure data is greater than or equal to a first pressure threshold, and / or determining, according to the target pressure data, that second target pressure data in the target pressure data is less than or equal to a second pressure threshold, and determining that the delivery tube is blocked in an upstream section of the drive mechanism along the infusion direction; Among them, the first pressure threshold and the second pressure threshold are both determined according to a reference pressure value or a reference pressure range, and the reference pressure value and the reference pressure range are respectively used to characterize the data value or the corresponding data range corresponding to the pressure data of the delivery tube under a normal infusion state.

5. The method according to claim 4, characterized in that The step of determining that the flow state in the delivery pipe is an abnormal state according to the ultrasonic signal of the ultrasonic sensor includes: Acquiring an ultrasonic signal from the ultrasonic sensor; Determining ultrasound data according to the ultrasound signal; According to the ultrasonic data, it is determined that the flow state in the delivery pipe is an abnormal state.

6. The method according to claim 1, characterized in that The step of determining, based on the target pressure data, that the delivery tube is blocked in an upstream section of the drive mechanism along the infusion direction comprises: In a first time period during the infusion process, determining, based on the target pressure data, that the delivery tube is blocked in an upstream section of the drive mechanism along the infusion direction; During a second time period of the infusion process, it is determined based on the target pressure data that the delivery tube is blocked in a downstream section of the drive mechanism along the infusion method.

7. The method according to claim 6, characterized in that The method of determining, during the second time period during the infusion process, based on the target pressure data, that the delivery tube is blocked in a downstream section of the drive mechanism along the infusion method comprises: In a second time period during the infusion process, it is determined, based on the target pressure data, that at least part of the target pressure data is greater than or equal to a third pressure threshold, and it is determined that the delivery tube is blocked in a downstream section of the drive mechanism along the infusion direction; The third pressure threshold is determined according to an empirical value of the blocking pressure of the downstream section.

8. The method according to claim 1, characterized in that Determining target pressure data according to the pressure signal includes: Determining, according to the pressure signal, that the target pressure data includes a minimum pressure value and a maximum pressure value of at least one time period; or Determining, according to the pressure signal, that the target pressure data includes a variance or a standard deviation of a positive pressure value in at least one time period, and a minimum pressure value in the time period; or The target pressure data is determined according to the pressure signal, including a variance or a standard deviation of a forward pressure value within at least one time period, and a variance or a standard deviation of a reverse pressure value within the time period.

9. The method according to claim 1, characterized in that: The driving mechanism includes a driving motor; the step of obtaining the pressure signal of the pressure sensor includes: During at least a partial time period when the drive motor is operating, a pressure signal from the pressure sensor is acquired.

10. A fluid delivery device, characterized in that: The fluid delivery device comprises a main unit and a delivery pipe installation channel; a driving mechanism, a pressure sensor and a processor are arranged in the main unit; the delivery pipe installation channel is used to install the delivery pipe; At least a part of the driving mechanism is disposed on the delivery tube installation channel, and the driving mechanism is used to squeeze the fluid in the delivery tube under the control of the processor so that the fluid moves in an infusion direction, and the infusion direction is a direction in the delivery tube pointing to an infusion object; At least a part of the pressure sensor is disposed on the delivery pipe installation passage, and the pressure sensor is used to detect the pressure of the delivery pipe under the control of the processor; Wherein, the delivery tube installation channel has an inlet end and an outlet end, and along the infusion direction, the inlet end and the outlet end are respectively arranged in the upstream section and the downstream section of the driving mechanism, and the pressure sensor is arranged in the downstream section between the driving mechanism and the outlet end; The processor is used to configure and execute the method described in any one of claims 1-9 above.

11. A method for detecting a blockage, characterized in that: The method is applied to a fluid delivery device, which comprises a mainframe and a delivery tube installation channel, wherein a driving mechanism, a pressure sensor and a processor are arranged in the mainframe, and the delivery tube installation channel is used to install the delivery tube; at least a part of the driving mechanism is arranged on the delivery tube installation channel, and the driving mechanism is used to squeeze the fluid in the delivery tube under the control of the processor, so that the fluid moves in an infusion direction, and the infusion direction is a direction in the delivery tube pointing to an infusion object; at least a part of the pressure sensor is arranged on the delivery tube installation channel, and the pressure sensor is used to detect the pressure of the delivery tube under the control of the processor; the delivery tube installation channel has an inlet end and an outlet end, and along the infusion direction, the inlet end and the outlet end are respectively arranged in the upstream section and the downstream section of the driving mechanism; wherein the pressure sensor is arranged in the downstream section between the driving mechanism and the outlet end; The method comprises: Acquiring a pressure signal from the pressure sensor; Obtaining pressure data according to the pressure signal; Determining that at least a portion of the pressure data is greater than or equal to a first pressure threshold; Determining that at least a portion of the pressure data is less than or equal to a second pressure threshold; determining that at least a portion of the pressure data is greater than or equal to a third pressure threshold, wherein the third pressure threshold is greater than the first pressure threshold; Determining that the delivery tube is blocked in a downstream section of the drive mechanism along the infusion direction, or determining that the delivery tube is blocked in an upstream section of the drive mechanism along the infusion direction; Output alarm information.

12. The method according to claim 11, characterized in that The step of determining that the delivery tube is blocked in a downstream section of the driving mechanism along the infusion direction, or determining that the delivery tube is blocked in an upstream section of the driving mechanism along the infusion direction, comprises: If at least part of the pressure data is greater than or equal to the third pressure threshold, and at least part of the pressure data is not less than or equal to the second pressure threshold, it is determined that the delivery tube is blocked in the downstream section of the driving mechanism along the infusion direction; If at least part of the pressure data is greater than or equal to a first pressure threshold and at least part of the pressure data is less than or equal to a second pressure threshold, it is determined that the delivery tube is blocked in an upstream section of the drive mechanism along the infusion direction.

13. A rotary peristaltic pump, characterized in that: The rotary peristaltic pump comprises a housing, a power supply, a processor, a rotary drive mechanism, an ultrasonic sensor and a pressure sensor, the housing comprises a mounting panel, and the rotary drive mechanism comprises a drive assembly and a roller assembly; At least a part of the driving assembly is disposed inside the housing and is connected to the power supply and the processor respectively; At least a part of the roller assembly is exposed on the mounting panel, and is used for the delivery pipe to be sleeved therein, and driven by the driving assembly, the plurality of rotors on the roller assembly are driven to squeeze in sequence, so as to make the fluid in the delivery pipe move in a directional manner; The installation panel is provided with a first pipe groove for accommodating the upstream section of the delivery pipe and a second pipe groove for accommodating the downstream section of the delivery pipe; The ultrasonic sensor is at least partially disposed on the first pipe groove for detecting the flow state in the upstream section of the delivery pipe; The pressure sensor is at least partially disposed on the second pipe groove, and is used to detect the pressure of the downstream section in the delivery pipe; The processor is used to determine the blockage state in the upstream section and the downstream section of the conveying pipe according to the pressure signal of the pressure sensor, or according to the combination of the pressure signal of the pressure sensor and the ultrasonic signal of the ultrasonic sensor.

Images