WO2021056629A1 - 一种利用应变片变形量检测清洗分离废液针堵针的装置 - Google Patents

一种利用应变片变形量检测清洗分离废液针堵针的装置 Download PDF

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Publication number
WO2021056629A1
WO2021056629A1 PCT/CN2019/111372 CN2019111372W WO2021056629A1 WO 2021056629 A1 WO2021056629 A1 WO 2021056629A1 CN 2019111372 W CN2019111372 W CN 2019111372W WO 2021056629 A1 WO2021056629 A1 WO 2021056629A1
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Prior art keywords
strain gauge
pipeline
cleaning
waste liquid
deformation
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PCT/CN2019/111372
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English (en)
French (fr)
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吴国银
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苏州长光华医生物医学工程有限公司
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Publication of WO2021056629A1 publication Critical patent/WO2021056629A1/zh

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    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B08—CLEANING
    • B08B—CLEANING IN GENERAL; PREVENTION OF FOULING IN GENERAL
    • B08B13/00—Accessories or details of general applicability for machines or apparatus for cleaning
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
    • G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
    • G01B7/16—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge
    • G01B7/18—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring the deformation in a solid, e.g. by resistance strain gauge using change in resistance
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
    • G01D21/00—Measuring or testing not otherwise provided for

Definitions

  • the present application belongs to the technical field of medical devices, and in particular relates to a device for detecting, cleaning and separating waste liquid needle plugging by using strain gauge deformation amount.
  • the most commonly used diagnostic method in the medical field-in vitro diagnosis refers to the collection of human body fluids, excreta, and secretions for chemical composition or chemical reaction analysis to determine human disease. Such as chemiluminescence analysis, molecular diagnosis. These diagnostic methods all use automatic or semi-automatic instruments for sample addition, analysis, and diagnostic reports.
  • the technical problem to be solved by the present invention is to solve the insufficiency of the pipeline pressure detection method for cleaning and separating plugged needles in the prior art, thereby providing a device for detecting and cleaning and separating the plugged needles of waste liquid by using strain gauge deformation.
  • a device for detecting and cleaning and separating waste liquid needle plugging by using strain gauge deformation including:
  • Strain gauges which extend from the outside of the pipeline into the inside of the pipeline, can be deformed when contacting the water flow in the pipeline; the strain gauges are flat in shape and form a certain angle with the cross section of the pipeline;
  • the Wheatstone bridge circuit is arranged outside the pipeline and connected in parallel with the strain gauge;
  • the steering mechanism is arranged at the connection between the strain gauge and the pipeline, and the steering mechanism is used to adjust the direction of the strain gauge.
  • the pipeline is provided with an induction sheet, and when the strain gauge is not deformed, it contacts the induction sheet, and the strain When the sheet is deformed, it is out of contact with the sensing sheet, and when the sensing sheet is in contact with or out of contact with the strain gauge, an electrical signal can be fed back.
  • the Wheatstone bridge circuit includes a voltage signal acquisition module, and the voltage signal acquisition module can collect the Wheatstone bridge circuit.
  • the voltage signal acquisition module can collect the Wheatstone bridge circuit.
  • the differential voltage signal generated by the strain gauge deformation In the differential voltage signal generated by the strain gauge deformation.
  • the device of the present invention uses strain gauge deformation to detect and separate waste liquid needle plugged needles, and the sensor sheet can control the voltage signal acquisition module to start or stop the acquisition of differential voltage signals when the electrical signal is fed back.
  • the device of the present invention uses strain gauge deformation to detect and separate waste liquid needle plugging needles, the pipe diameter at the position where the strain gauge is installed on the pipeline is small in the middle, and the two ends are large, so that the cleaning liquid can flow through The flow rate increases when the strain gauge is installed.
  • the device of the present invention uses a strain gauge to detect the amount of deformation of a cleaning and separating waste liquid needle plugging the needle, the strain gauge is in a plane shape and forms an angle of 30 degrees with the cross section of the pipeline.
  • the shape of the strain gauge is spiral, and the hollow area of the strain gauge accounts for 40%-50% of the entire area.
  • the device for detecting and separating the waste liquid needle plugging the needle by using the deformation of the strain gauge includes:
  • the knob is embedded and installed on the side wall of the pipeline, and is sealed with a sealing ring at the connecting edge of the pipeline;
  • Limiting mechanism for limiting the rotation angle of the knob
  • the strain gauge is connected to the knob.
  • the limit mechanism restricts the rotation angle of the knob to 180 degrees.
  • the pipe diameter at the position where the strain gauge is installed on the pipeline is large in the middle and small at both ends.
  • a method for detecting, cleaning and separating waste liquid needle plugging needles by using strain gauge deformation includes the following steps:
  • Step 1 Set a strain gauge in the pipeline through which the cleaning liquid flows, and make the strain gauge and the cross section of the pipeline form a certain angle, and at the same time, make the connection between the strain gauge and the pipeline form a seal;
  • Step 2 Set up a Wheatstone bridge circuit outside the pipeline, and connect the strain gauge to the Wheatstone bridge circuit in parallel;
  • Step 3 Perform the extraction of the waste liquid from detection, cleaning and separation, collect the differential voltage signal in the Wheatstone bridge circuit, and determine the degree of clogging of the waste liquid needle by judging the increase or decrease of the differential voltage signal.
  • the beneficial effects of the present invention are: it can directly reflect the needle blockage in the cleaning, separating and pumping liquid pipeline, the accuracy is greatly improved compared with the traditional pressure sensing, and the degree of blockage can be quantified to a certain extent.
  • FIG. 1 is a schematic structural diagram of a device for detecting a needle plugging a needle for cleaning and separating waste liquid by using a strain gauge deformation amount in Embodiment 1 of the present application;
  • Fig. 2 is a schematic diagram of embodiment 1 of the present application when the liquid flow direction is opposite to that of Fig. 1;
  • FIG. 3 is a schematic diagram of the shape of the strain gauge in Example 1 of the present application.
  • FIG. 4 is a schematic structural diagram of a device for detecting a needle plugging a needle for cleaning and separating waste liquid by using a strain gauge deformation amount in Embodiment 2 of the present application.
  • connection should be understood in a broad sense, unless otherwise clearly specified and limited.
  • it can be a fixed connection or a detachable connection.
  • Connected or integrally connected it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication between two components.
  • connection should be understood through specific circumstances.
  • This embodiment provides a device for detecting and separating a needle plugged by a waste liquid by using a strain gauge deformation amount, as shown in FIG. 1, including:
  • Pipeline 3 for the cleaning liquid to flow through
  • the strain gauge 1 which extends from the outside of the pipeline 3 into the inside of the pipeline, can be deformed when it contacts the water flow in the pipeline 3; the strain gauge 1 is in a plane shape and forms a certain angle with the cross section of the pipeline 3;
  • the Wheatstone bridge circuit 6 is arranged outside the pipeline 3 and connected in parallel with the strain gauge 1;
  • the steering mechanism 5 is arranged at the connection between the strain gauge 1 and the pipeline 3, and the steering mechanism is used to adjust the direction of the strain gauge 1.
  • the working principle of the device for detecting, cleaning and separating waste liquid needle plugging by using strain gauge deformation in this embodiment is as follows: the strain gauge is connected in parallel in the Wheatstone bridge circuit, and the resistance change generated when the strain gauge is deformed is converted into a differential voltage. The amount of deformation is proportional to the differential voltage. When the needle is blocked, the liquid flow rate decreases, the strain gauge deformation decreases, and the corresponding differential output voltage decreases.
  • This method can directly detect whether the pipeline is blocked by the needle. It can not only be used in the cleaning and separation of the waste liquid pipeline, but also when the sample needle and the reagent needle are aspirated.
  • the steering mechanism 5 is used to adjust the orientation of the strain gauge 1. As shown in FIG. 2, when the liquid needs to be discharged in the reverse direction, the steering mechanism 5 is used to adjust the strain gauge 1 to the other side as shown in FIG. 1.
  • the waste liquid needle 4 is connected with the pipeline 3 and then connected with the peristaltic pump to extract the waste liquid.
  • the flow direction of the liquid when the peristaltic pump is used to extract the waste liquid is shown in Figure 1.
  • the waste liquid extraction includes the following steps:
  • the Wheatstone bridge circuit 6 starts to collect the differential voltage signal after a delay of about 0.5s;
  • d. Calibrate the degree of needle blockage by the output differential voltage signal. For example, when 25% of the needle is blocked, 50% of the needle is blocked, 75% of the needle is blocked or completely blocked, the magnitude of the differential voltage signal corresponding to the state of the needle is corresponding. In the subsequent test, the degree of plugging of the waste liquid needle 4 can be judged according to the size of the calibrated differential voltage signal;
  • the Wheatstone bridge circuit stops collecting differential voltage signals.
  • the device for detecting the needle plugging of the cleaning and separating waste liquid by using the strain gauge deformation of this embodiment is provided with an induction sheet 2 in the pipeline, and the strain gauge 1 is not deformed.
  • the strain gauge 1 When in contact with the sensor sheet 2 when the strain gauge 1 is deformed, it is out of contact with the sensor sheet 2, and the sensor sheet 2 can feed back electrical signals when it comes into contact with or out of contact with the strain gauge 1.
  • Both the sensor sheet 2 and the strain gauge 1 have a waterproof structure.
  • the Wheatstone bridge circuit 6 includes a voltage signal acquisition module, and the voltage signal acquisition module can collect the Wheatstone current The differential voltage signal generated by the deformation of the strain gauge 1 in the bridge circuit 6.
  • the sensor sheet 2 can control the voltage signal acquisition module to start or stop the acquisition of differential voltage signals when the electrical signal is fed back.
  • This structure enables the voltage signal acquisition module to suspend work when there is no liquid flowing in the pipeline 3, that is, when the waste liquid pumping work is not in progress, reducing the burden on the equipment, and the voltage signal can be collected immediately when the waste liquid pumping work is in progress. .
  • the device for detecting and separating the waste liquid needle plugging needle by using the strain gauge deformation amount of this embodiment as shown in FIG. 1, the pipe diameter of the pipe 3 at the position where the strain gauge 1 is installed is small, The two ends are large, so that the flow rate of the cleaning liquid increases when the cleaning fluid flows through the installation position of the strain gauge 1. Amplify the flow velocity at the location of the strain gauge 1 on the structure to increase the flow velocity there, that is, increase the degree of flow velocity change, indirectly increase the size of the differential voltage signal, increase the overall test data, and reduce the error.
  • the device for detecting and separating the needle plugging of the waste liquid by using the strain gauge deformation of the present embodiment has a plane shape and forms an angle of 30 degrees with the cross section of the pipeline 3. This angle can make the strain gauge 1 more sensitively deform, that is, indirectly amplify the size of the differential voltage signal, increase the overall test data, and reduce the error.
  • the device for detecting the amount of deformation of the strain gauge in this embodiment for cleaning and separating waste liquid needle plugging needles as shown in FIG. 3, the shape of the strain gauge 1 is spiral, and the hollow area of the strain gauge 1 occupies the whole 40%-50% of the area.
  • the spiral shape can more evenly contact the water flow at the cross-sectional position of the pipeline 3, so that the measured data fluctuates less.
  • the steering mechanism 5 includes:
  • the knob is embedded and installed on the side wall of the pipeline 3, and the connecting edge with the pipeline 3 is sealed by a sealing ring;
  • Limiting mechanism for limiting the rotation angle of the knob
  • the strain gauge 1 is connected to the knob.
  • the limit mechanism restricts the rotation angle of the knob to 180 degrees.
  • a method for detecting, cleaning and separating waste liquid needle plugging needles by using strain gauge deformation includes the following steps:
  • Step 1 Set a strain gauge in the pipeline through which the cleaning liquid flows, and make the strain gauge and the cross section of the pipeline form a certain angle, and at the same time, make the connection between the strain gauge and the pipeline form a seal;
  • Step 2 Set up a Wheatstone bridge circuit outside the pipeline, and connect the strain gauge to the Wheatstone bridge circuit in parallel;
  • Step 3 Perform the extraction of the waste liquid from detection, cleaning and separation, collect the differential voltage signal in the Wheatstone bridge circuit, and determine the degree of clogging of the waste liquid needle by judging the increase or decrease of the differential voltage signal.
  • a device that uses strain gauge deformation to detect and clean and separate waste liquid needle plugging needles includes:
  • Pipeline 3 for the cleaning liquid to flow through
  • the strain gauge 1 which extends from the outside of the pipeline 3 into the inside of the pipeline, can be deformed when it contacts the water flow in the pipeline 3; the strain gauge 1 is in a plane shape and forms a certain angle with the cross section of the pipeline 3;
  • the Wheatstone bridge circuit 6 is arranged outside the pipeline 3 and connected in parallel with the strain gauge 1;
  • the steering mechanism 5 is arranged at the connection between the strain gauge 1 and the pipeline 3, and the steering mechanism is used to adjust the direction of the strain gauge 1.
  • the pipeline is provided with an induction sheet 2 which is in contact with the induction sheet 2 when the strain gauge 1 is not deformed.
  • the strain gauge 1 is deformed, it is out of contact with the sensing sheet 2, and when the sensing sheet 2 is in contact with or out of contact with the strain gauge 1, an electrical signal can be fed back.
  • the Wheatstone bridge circuit 6 includes a voltage signal acquisition module, and the voltage signal acquisition module can collect the Wheatstone current The differential voltage signal generated by the deformation of the strain gauge 1 in the bridge circuit 6.
  • the sensor sheet 2 can control the voltage signal acquisition module to start or stop the acquisition of differential voltage signals when the electrical signal is fed back.
  • the device for detecting the needle plugging of the cleaning and separating waste liquid by using the strain gauge deformation of this embodiment is large in the middle of the pipe diameter at the position where the strain gauge 1 is installed, The ends are small.
  • This structure can facilitate the increase of the flow rate at the strain gauge 1, ensure the overall flow velocity of the pipeline, and reduce the blocking influence of the strain gauge 1 on the liquid flow.

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  • Physics & Mathematics (AREA)
  • General Physics & Mathematics (AREA)
  • Cleaning In General (AREA)
  • Measuring Volume Flow (AREA)
  • Investigating Or Analyzing Materials By The Use Of Electric Means (AREA)

Abstract

一种利用应变片变形量检测清洗分离废液针堵针的装置，包括：管路（3），用于供清洗液流经；应变片（1），从管路（3）外侧伸入管路（3）内部，能够在接触管路（3）内水流时产生形变；应变片（1）为平面形状且与管路（3）的横截面成一定角度；惠斯通电桥电路（6），设置在管路（3）外部，并与应变片（1）并联；转向机构，设置于应变片（1）与管路（3）连接处，转向机构（5）用于调整应变片（1）的方向。能够直接反应出清洗分离抽废液管路（3）中的堵针情况，精确度相比传统的压力传感大大提高，并且可以做到一定程度对堵塞程度的量化。

Description

一种利用应变片变形量检测清洗分离废液针堵针的装置 技术领域
本申请属于医疗器械技术领域，尤其是涉及一种利用应变片变形量检测清洗分离废液针堵针的装置。
背景技术
目前医学领域最为普遍使用的诊断方法——体外诊断，是指采集人体的体液、排泄物、分泌物进行化学成分或者化学反应分析，从而判断人体病变。如化学发光分析法、分子诊断。这些诊断方法，均采用自动或者半自动仪器进行加样，分析，并给出诊断报告。
化学发光免疫分析测试过程中，清洗分离的效果直接决定化学发光检测的准确性。清洗分离功能异常，特别是清洗分离废液针堵针时必然影响着最后分析仪发光检测结果的可靠性。现行的检测清洗分离堵针多采用管路压力检测的方式，比较间接，检测灵敏度不高。
发明内容
本发明要解决的技术问题是：为解决现有技术中清洗分离堵针的采用管路压力检测的方式不足，从而提供一种利用应变片变形量检测清洗分离废液针堵针的装置。
本发明解决其技术问题所采用的技术方案是：一种利用应变片变形量检测清洗分离废液针堵针的装置，包括：
管路，用于供清洗液流经；
应变片，从管路外侧伸入管路内部，能够在接触管路内水流时产生形变；所述应变片为平面形状且与管路的横截面成一定角度；
惠斯通电桥电路，设置在管路外部，并与所述应变片并联；
转向机构，设置于所述应变片与管路连接处，所述转向机构用于调整所述应变片的方向。
优选地，本发明的利用应变片变形量检测清洗分离废液针堵针的装置，所述管 路内设有感应片，所述应变片未发生形变时与所述感应片接触，所述应变片发生形变时与所述感应片脱离接触，所述感应片与所述应变片接触或脱离接触时能够反馈电信号。
优选地，本发明的利用应变片变形量检测清洗分离废液针堵针的装置，所述惠斯通电桥电路包括电压信号采集模块，所述电压信号采集模块能够采集所述惠斯通电桥电路中由所述应变片形变而产生的差分电压信号。
优选地，本发明的利用应变片变形量检测清洗分离废液针堵针的装置，所述感应片反馈电信号时能够控制所述电压信号采集模块开始或停止对差分电压信号的采集。
优选地，本发明的利用应变片变形量检测清洗分离废液针堵针的装置，所述管路上在所述应变片安装的位置的管径中间小，两端大，以使清洗液流经所述应变片安装的位置时流速增大。
优选地，本发明的利用应变片变形量检测清洗分离废液针堵针的装置，所述应变片为平面形状且与管路的横截面成30度角。
优选地，本发明的利用应变片变形量检测清洗分离废液针堵针的装置，所述应变片的形状为螺旋状，所述应变片的镂空面积占整体面积的40％-50％。
优选地，本发明的利用应变片变形量检测清洗分离废液针堵针的装置，所述转向机构包括：
旋钮，嵌入安装于所述管路的侧壁，并与所述管路的连接边缘处通过密封圈密封；
限位机构，用于限制所述旋钮的转动角度；
所述应变片连接在所述旋钮上。
优选地，本发明的利用应变片变形量检测清洗分离废液针堵针的装置，所述限位机构限制所述旋钮的转动角度为180度。
优选地，本发明的利用应变片变形量检测清洗分离废液针堵针的装置，所述管路上在所述应变片安装的位置的管径中间大，两端小。
一种利用应变片变形量检测清洗分离废液针堵针的方法，包括以下步骤：
步骤一，在供清洗液流经的管路内设置应变片，并使所述应变片与管路的横截 面成一定角度，同时使应变片与管路的连接处形成密封；
步骤二，在所述管路外部设置惠斯通电桥电路，并将所述应变片并联入惠斯通电桥电路中；
步骤三，进行检测清洗分离废液的抽取，采集惠斯通电桥电路中的差分电压信号，通过判断差分电压信号增大或减小来判别废液针的堵塞程度。
本发明的有益效果是：能够直接反应出清洗分离抽废液管路中的堵针情况，精确度相比传统的压力传感大大提高，并且可以做到一定程度对堵塞程度的量化。
附图说明
下面结合附图和实施例对本申请的技术方案进一步说明。
图1是本申请实施例1的利用应变片变形量检测清洗分离废液针堵针的装置结构示意图；
图2是本申请实施例1的与图1液体流向相反时的示意图；
图3是本申请实施例1的应变片形状示意图；
图4是本申请实施例2的利用应变片变形量检测清洗分离废液针堵针的装置结构示意图。
图中的附图标记为：
1应变片
2感应片
3管路
4废液针
5转向机构
6惠斯通电桥电路。
具体实施方式
需要说明的是，在不冲突的情况下，本申请中的实施例及实施例中的特征可以相互组合。
在本申请的描述中，需要理解的是，术语“中心”、“纵向”、“横向”、“上”、“下”、“前”、“后”、“左”、“右”、“竖直”、“水平”、“ 顶”、“底”、“内”、“外”等指示的方位或位置关系为基于附图所示的方位或位置关系，仅是为了便于描述本申请和简化描述，而不是指示或暗示所指的装置或元件必须具有特定的方位、以特定的方位构造和操作，因此不能理解为对本申请保护范围的限制。此外，术语“第一”、“第二”等仅用于描述目的，而不能理解为指示或暗示相对重要性或者隐含指明所指示的技术特征的数量。由此，限定有“第一”、“第二”等的特征可以明示或者隐含地包括一个或者更多个该特征。在本发明创造的描述中，除非另有说明，“多个”的含义是两个或两个以上。
在本申请的描述中，需要说明的是，除非另有明确的规定和限定，术语“安装”、“相连”、“连接”应做广义理解，例如，可以是固定连接，也可以是可拆卸连接，或一体地连接；可以是机械连接，也可以是电连接；可以是直接相连，也可以通过中间媒介间接相连，可以是两个元件内部的连通。对于本领域的普通技术人员而言，可以通过具体情况理解上述术语在本申请中的具体含义。
下面将参考附图并结合实施例来详细说明本申请的技术方案。实施例1
本实施例提供一种利用应变片变形量检测清洗分离废液针堵针的装置，如图1所示，包括：
管路3，用于供清洗液流经；
应变片1，从管路3外侧伸入管路内部，能够在接触管路3内水流时产生形变；所述应变片1为平面形状且与管路3的横截面成一定角度；
惠斯通电桥电路6，设置在管路3外部，并与所述应变片1并联；
转向机构5，设置于所述应变片1与管路3连接处，所述转向机构用于调整所述应变片1的方向。
本实施例的利用应变片变形量检测清洗分离废液针堵针的装置的工作原理为：应变片并联入惠斯通电桥电路中，当应变片发生变形时产生的电阻变化转换成差分电压，变形量与差分电压成正比。当发生堵针时，液体流速降低，应变片变形量降低，相应的差分输出电压降低。该方式可以直接检测到管路是否发生堵针，不仅可以应用在清洗分离抽废液管路中，在样本针和试剂针吸样时也同 样适用。转向机构5用于调整应变片1的朝向，如图2所示，当需要反向排出液体时，用转向机构5调整应变片1朝向如图1所示的另一侧。
本实施例中采用废液针4和管路3连接后再与蠕动泵连接抽取废液的装置，使用蠕动泵抽取废液时液体的流向如图1所示，抽废液包括以下步骤：
a、当蠕动泵开始抽废液时，延后0.5s左右，惠斯通电桥电路6开始采集差分电压信号；
b、当废液流过应变片1时，应变片1发生变形；
c、当废液针4发生堵针时，流过应变片1的液体流速会明显降低，相应的，通过惠斯通电桥转化后的差分电压信号也会明显降低；
d、通过输出的差分电压信号大小标定堵针的程度，如在25％堵针，50％堵针，75％堵针或完全堵塞时，对对应堵针状态时的差分电压信号大小进行对应，在之后的测试中，可以依据该标定的差分电压信号大小来判断废液针4堵针的程度；
e、在蠕动泵停止工作前0.5s左右，惠斯通电桥电路停止采集差分电压信号。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，如图1、2所示，所述管路内设有感应片2，所述应变片1未发生形变时与所述感应片2接触，所述应变片1发生形变时与所述感应片2脱离接触，所述感应片2与所述应变片1接触或脱离接触时能够反馈电信号。感应片2和应变片1均具有防水结构。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，所述惠斯通电桥电路6包括电压信号采集模块，所述电压信号采集模块能够采集所述惠斯通电桥电路6中由所述应变片1形变而产生的差分电压信号。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，所述感应片2反馈电信号时能够控制所述电压信号采集模块开始或停止对差分电压信号的采集。该结构使管路3内无液体流动时，即抽废液工作尚未进行时，电压信号采集模块暂停工作，减小设备负担，而在抽废液工作进行时，又能够即刻进行电压信号的采集。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，如图1所示，所述管路3上在所述应变片1安装的位置的管径中间小，两端大，以使清洗液流经所述应变片1安装的位置时流速增大。在结构上放大应变片1位置的流 速，使该处流速增大，即增大了流速的变化程度，间接地增大了差分电压信号的大小，使测试数据整体增大，减小误差。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，如图1所示，所述应变片1为平面形状且与管路3的横截面成30度角。该角度能够使应变片1比较灵敏地发生形变，即间接放大了差分电压信号的大小，使测试数据整体增大，减小误差。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，如图3所示，所述应变片1的形状为螺旋状，所述应变片1的镂空面积占整体面积的40％-50％。螺旋状能够更加平均地接触管路3横截面位置的水流，使测量的数据波动更小。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，所述转向机构5包括：
旋钮，嵌入安装于所述管路3的侧壁，并与所述管路3的连接边缘处通过密封圈密封；
限位机构，用于限制所述旋钮的转动角度；
所述应变片1连接在所述旋钮上。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，所述限位机构限制所述旋钮的转动角度为180度。
一种利用应变片变形量检测清洗分离废液针堵针的方法，包括以下步骤：
步骤一，在供清洗液流经的管路内设置应变片，并使所述应变片与管路的横截面成一定角度，同时使应变片与管路的连接处形成密封；
步骤二，在所述管路外部设置惠斯通电桥电路，并将所述应变片并联入惠斯通电桥电路中；
步骤三，进行检测清洗分离废液的抽取，采集惠斯通电桥电路中的差分电压信号，通过判断差分电压信号增大或减小来判别废液针的堵塞程度。
实施例2
一种利用应变片变形量检测清洗分离废液针堵针的装置，包括：
管路3，用于供清洗液流经；
应变片1，从管路3外侧伸入管路内部，能够在接触管路3内水流时产生形变；所述应变片1为平面形状且与管路3的横截面成一定角度；
惠斯通电桥电路6，设置在管路3外部，并与所述应变片1并联；
转向机构5，设置于所述应变片1与管路3连接处，所述转向机构用于调整所述应变片1的方向。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，所述管路内设有感应片2，所述应变片1未发生形变时与所述感应片2接触，所述应变片1发生形变时与所述感应片2脱离接触，所述感应片2与所述应变片1接触或脱离接触时能够反馈电信号。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，所述惠斯通电桥电路6包括电压信号采集模块，所述电压信号采集模块能够采集所述惠斯通电桥电路6中由所述应变片1形变而产生的差分电压信号。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，所述感应片2反馈电信号时能够控制所述电压信号采集模块开始或停止对差分电压信号的采集。
优选地，本实施例的利用应变片变形量检测清洗分离废液针堵针的装置，如图4所示，所述管路3上在所述应变片1安装的位置的管径中间大，两端小。该结构能够便于应变片1处的流量增大，保证管道整体的流速，减小应变片1对液体流动的阻挡影响。
以上述依据本申请的理想实施例为启示，通过上述的说明内容，相关工作人员完全可以在不偏离本项申请技术思想的范围内，进行多样的变更以及修改。本项申请的技术性范围并不局限于说明书上的内容，必须要根据权利要求范围来确定其技术性范围。
发明概述
技术问题
问题的解决方案
发明的有益效果

Claims (10)

  1. 一种利用应变片变形量检测清洗分离废液针堵针的装置，其特征在于，包括：
    管路(3)，用于供清洗液流经；
    应变片(1)，从管路(3)外侧伸入管路内部，能够在接触管路(3)内水流时产生形变；所述应变片(1)为平面形状且与管路(3)的横截面成一定角度；
    惠斯通电桥电路(6)，设置在管路(3)外部，并与所述应变片(1)并联；
    转向机构(5)，设置于所述应变片(1)与管路(3)连接处，所述转向机构用于调整所述应变片(1)的方向。
  2. 根据权利要求1所述的利用应变片变形量检测清洗分离废液针堵针的装置，其特征在于，所述管路内设有感应片(2)，所述应变片(1)未发生形变时与所述感应片(2)接触，所述应变片(1)发生形变时与所述感应片(2)脱离接触，所述感应片(2)与所述应变片(1)接触或脱离接触时能够反馈电信号。
  3. 根据权利要求2所述的利用应变片变形量检测清洗分离废液针堵针的装置，其特征在于，所述惠斯通电桥电路(6)包括电压信号采集模块，所述电压信号采集模块能够采集所述惠斯通电桥电路(6)中由所述应变片(1)形变而产生的差分电压信号。
  4. 根据权利要求3所述的利用应变片变形量检测清洗分离废液针堵针的装置，其特征在于，所述感应片(2)反馈电信号时能够控制所述电压信号采集模块开始或停止对差分电压信号的采集。
  5. 根据权利要求1-4任一项所述的利用应变片变形量检测清洗分离废 液针堵针的装置，其特征在于，所述管路(3)上在所述应变片(1)安装的位置的管径中间小，两端大，以使清洗液流经所述应变片(1)安装的位置时流速增大。
  6. 根据权利要求1-5任一项所述的利用应变片变形量检测清洗分离废液针堵针的装置，其特征在于，所述应变片(1)为平面形状且与管路(3)的横截面成30度角。
  7. 根据权利要求1-5任一项所述的利用应变片变形量检测清洗分离废液针堵针的装置，其特征在于，所述应变片(1)的形状为螺旋状，所述应变片(1)的镂空面积占整体面积的40％-50％。
  8. 根据权利要求1-5任一项所述的利用应变片变形量检测清洗分离废液针堵针的装置，其特征在于，所述转向机构包括：旋钮，嵌入安装于所述管路(3)的侧壁，并与所述管路(3)的连接边缘处通过密封圈密封；限位机构，用于限制所述旋钮的转动角度；所述应变片(1)连接在所述旋钮上。
  9. 根据权利要求8所述的利用应变片变形量检测清洗分离废液针堵针的装置，其特征在于，所述限位机构限制所述旋钮的转动角度为180度。
  10. 根据权利要求1-4任一项所述的利用应变片变形量检测清洗分离废液针堵针的装置，其特征在于，所述管路(3)上在所述应变片(1)安装的位置的管径中间大，两端小。
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