CN103272304A - Peristaltic analgesia pump and flow rate detection and fault diagnosis method thereof - Google Patents

Abstract

The invention relates to a medical medium injection flow rate control device and a fault diagnosis method, in particular to a peristaltic analgesia pump and a flow rate detection and fault diagnosis method of the peristaltic analgesia pump. A first touch force sensor is arranged at the position of any one point A of a transfusion pipeline, a second touch force sensor is installed at the position of any one point B of the transfusion pipeline, the first touch force sensor and the second touch force sensor are connected with a flow detection device through signal lines, the flow detection device feeds back data to the peristaltic analgesia pump through a signal line, and a flow rate detection device is constituted. The first touch force sensor and the second touch force sensor are connected with an A/D converter through signal lines, the A/D converter converts the data into an impulse sequence and inputs the impulse sequence into a data processor, and the data processor feeds back data to the peristaltic analgesia pump. The peristaltic analgesia pump can feed medicine, a transfusion medicine feeding flow rate control and fault diagnosis method is provided through detection of pressure generated by fluid on the pipe wall and the frequency of the fluid in the transfusion pipeline, and therefore the purpose that the peristaltic analgesia pump conducts accurate and reliable operation according to a set controllable mode can be achieved.

Description

The method of wriggling analgesia pump and flow rate detection and fault diagnosis

[technical field]

The present invention relates to medical medium input flow rate control device and method for diagnosing faults, the method for be specifically related to wriggle analgesia pump and flow rate detection and fault diagnosis.

[background technology]

At present, analgesia pump substantially all adopts peristaltic pump clinically, by elasticity infusion pipeline constantly push and release realization continue the pumping medicinal liquid of pump head to pump, but is difficult to accomplish the detection of infusion flow rate and the monitoring of infusion process.Detection major part to infusion flow rate is counted based on infrared drop; To the monitoring of infusion process, also only be confined to stop up or the detection of bubble, but seldom relate to infusion pipeline particularly the wriggle aging monitoring of extruding infusion pipeline and the falling monitoring of infusion pipeline.Detection to the infusion pipeline flow velocity, because the wriggling analgesia pump belongs to micro-administration, the administration range is for generally in 1000ml/h, its infusion pipeline internal diameter is general＜5mm, thereby industrial non-contact measuring technology commonly used, all be difficult to realization to the transfusion administration flow detection of wriggling analgesia pump as ultrasonic flow detection and Electromagnetic Flow detection, mostly adopt infrared drop counting in the market, but be subjected to the accurate counting of the very difficult realization of external interference.

[summary of the invention]

In order to solve above-mentioned deficiency of the prior art and defective, the present invention proposes can be when the wriggling analgesia pump alternately pushes the infusion pipeline administration, by detecting pressure and the frequency that the infusion pipeline inner fluid produces tube wall, set up the wriggling analgesia pump of transfusion administration flow velocity model and fault diagnosis model:

Design a kind of wriggling analgesia pump based on flow detection and fault diagnosis thereof for achieving the above object, comprise infusion pipeline, first touch force sensor, second touch force sensor, flow detector, A/D converter and data processor, it is characterized in that any 1 A point place is provided with first touch force sensor in the infusion pipeline, any 1 B point place is provided with second touch force sensor in the infusion pipeline, first touch force sensor and second touch force sensor are by holding wire connection traffic checkout gear, flow detector feeds back to the wriggling analgesia pump by holding wire, constitute flow monitor, first touch force sensor is connected A/D converter with second touch force sensor by holding wire, A/D converter converts Input Data Process after the pulse train to, data processor feeds back to the wriggling analgesia pump with data, constitutes trouble-shooter.

The present invention also comprises a kind of flow rate detection of above-mentioned wriggling analgesia pump based on flow detection and fault diagnosis thereof and the method for fault diagnosis, it is characterized in that described concrete grammar is as follows:

Infusion pipeline is under the effect of inner medicinal liquid fluid pressure, and canal path produces certain deformation to meeting, by being close to little touch force sensor of infusion pipeline outer wall, perception pipeline internal flow pressure change;

If the density of fluid is ρ, touch force sensor A is placed at any 1 A place at infusion pipeline, and corresponding pressure is P _A, flow velocity is v _A, sectional area is S _A, touch force sensor B is placed at any 1 B place at infusion pipeline, and corresponding pressure herein is P _B, flow velocity is v _B, sectional area is S _B, then A place flow equals B place flow, is v _AS _A=v _BS _B, note

$P_A+\frac{1}{2}{{\mathrm{\&rho;v}}_{\mathrm{<figure-callout\; id="2"\; label="A"\; filenames="HDA00003275776300011.png"\; state="\{\{state\}\}">A</figure-callout>}}}^2+{\mathrm{\&rho;gh}}_A=P_B+\frac{1}{2}{{\mathrm{\&rho;v}}_{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="HDA00003275776300011.png"\; state="\{\{state\}\}">B</figure-callout>}}}^2+{\mathrm{\&rho;gh}}_B$

Abbreviation gets $v_B=\sqrt{\frac{2(P_A-P_B)+2\mathrm{\&rho;g}(h_A-h_B)}{\mathrm{\&rho;}(1-{\mathrm{\&beta;}}^2)}}$

In infusion process, work as h _A=h _BThe time,

Δ P=P _A-P _B, the infusion flow rate v of B place _BUnder the condition that β does not change, directly depend on

Pulse frequency is designated as f, $f=\mathrm{d\&Delta;P}/\mathrm{dt};\mathrm{\&Delta;P}\&Proportional;{v_{\mathrm{<figure-callout\; id="2"\; label="B"\; filenames="HDA00003275776300011.png"\; state="\{\{state\}\}">B</figure-callout>}}}^2;$

Thereby the frequency of pulse characterizes the speed of administering medical liquids velocity variations, also namely reflects the speed of pump head extruding tube for transfusion; The intensity of pulse directly characterizes the size of infusion pipeline inner fluid pressure change, also namely reflects the size of administering medical liquids change in flow;

Note Δ P (t)=P (t)-P (t-1), expression transfusion administration t A, B two place's fluid pressures constantly is poor, by continuous detection Δ P intensity and frequency change, the variation of real-time reflection medicinal liquid flow velocity, particularly, when pulse frequency accelerates suddenly, show the injection speed quickening, infusion pipeline comes off or the equipment hardover failure; Frequency slows down, and shows that injection speed slows down, and infusion pipeline stops up or infusion pipeline wears out; When pulse strength strengthens, illustrate that dose increases, and increases administration danger; Pulse strength weakens, and pumping administration deficiency is described.

The present invention proposes the wriggling analgesia pump based on flow detection and fault diagnosis thereof.It is when the wriggling analgesia pump alternately pushes the infusion pipeline administration, by detecting pressure and the frequency that the infusion pipeline inner fluid produces tube wall, parameter according to medical personnel's setting, set up transfusion administration flow velocity model and fault diagnosis model, carry out data analysis, by feedback control, the realization analgesia pump is operated accurately and reliably according to set controlled pattern.

[description of drawings]

Fig. 1 is the annexation sketch map of embodiment 1;

Fig. 2 is the fault diagnosis flow scheme sketch map of embodiment 1;

1. analgesia pumps, 2. processes sensor A, 3. processes sensor B, 4. flow detectors, 5. infusion pipelines among the figure.

[specific embodiment]

In order to make purpose of the present invention, technical scheme and advantage clearer, the present invention is further elaborated.Production equipment among the application all is the common equipment of this area, should be appreciated that specific embodiment described herein only in order to explaining the present invention, and is not used in restriction the present invention.

Embodiment 1:

The present invention proposes the wriggling analgesia pump based on flow detection and fault diagnosis thereof.Specifically, it is when the wriggling analgesia pump alternately pushes the infusion pipeline administration, by detecting pressure and the frequency that the infusion pipeline inner fluid produces tube wall, parameter according to medical personnel's setting, set up transfusion administration flow velocity model and fault diagnosis model, carry out data analysis, by feedback control, the realization analgesia pump is operated accurately and reliably according to set controlled pattern.

In the hydrodynamics, perfect fluid is done permanent when mobile, satisfied law of conservation of energy, i.e. Bernoulli equation

P is fluid pressure in the formula, and ρ is fluid density, and ν is fluid velocity, and h is vertical height, and g is acceleration of gravity;

Infusion pipeline is under the effect of inner medicinal liquid fluid pressure, and canal path produces certain deformation to meeting, by being close to little touch force sensor of infusion pipeline outer wall, perception pipeline internal flow pressure change.We set up flow monitor thus, and its structure as shown in Figure 1;

If the density of fluid is ρ, place touch force sensor A at pipeline A place, corresponding pressure is P _A, flow velocity is v _A, sectional area is S _A, place touch force sensor B at pipeline B place, corresponding pressure herein is P _B, flow velocity is v _B, sectional area is S _BThen A place flow equals B place flow, is v _AS _A=v _BS _B, note

$P_A+\frac{1}{2}{{\mathrm{\&rho;}}_A}^2+{\mathrm{\&rho;gh}}_A=P_B+\frac{1}{2}{{\mathrm{\&rho;<figure-callout\; id="2"\; label="v\; B"\; filenames="HDA00003275776300011.png"\; state="\{\{state\}\}">v</figure-callout>}}_B}^2+{\mathrm{\&rho;gh}}_B$

Abbreviation gets $v_B=\sqrt{\frac{2(P_A-P_B)+2\mathrm{\&rho;g}(h_A-h_B)}{\mathrm{\&rho;}(1-{\mathrm{\&beta;}}^2)}}$

In infusion process, work as h _A=h _BThe time,

Δ P=P _A-P _B, the infusion flow rate v of B place _BUnder the condition that β does not change, directly depend on

We set up fault diagnosis model thus, and its diagnosis algorithm as shown in Figure 2;

Pulse frequency is designated as f, $f=\mathrm{d\&Delta;P}/\mathrm{dt};\mathrm{\&Delta;P}\&Proportional;{{\mathrm{<figure-callout\; id="2"\; label="v\; B"\; filenames="HDA00003275776300011.png"\; state="\{\{state\}\}">v</figure-callout>}}_B}^2;$

Thereby the frequency of pulse characterizes the speed of administering medical liquids velocity variations, also namely reflects the speed of pump head extruding tube for transfusion; The intensity of pulse directly characterizes the size of infusion pipeline inner fluid pressure change, also namely reflects the size of administering medical liquids change in flow.

Note Δ P (t)=P (t)-P (t-1), expression transfusion administration t A, B two place's fluid pressures constantly are poor.A, B two place's fluid pressures are poor constantly to show transfusion administration t.By continuous detected intensity and frequency change, the variation of real-time reflection medicinal liquid flow velocity.In application, the fss series touch force sensor that adopts honeywell company to produce every identical time detecting, passes through the A/D quantification treatment again, records as follows:

Particularly, when pulse frequency accelerates suddenly, show the injection speed quickening, infusion pipeline comes off or the equipment hardover failure; Frequency slows down, and shows that injection speed slows down, and possible infusion pipeline stops up or infusion pipeline wears out.When pulse strength strengthens, illustrate that dose increases, and increases administration danger; Pulse strength weakens, and pumping administration deficiency is described.

Claims (2)

1. wriggling analgesia pump based on flow detection and fault diagnosis thereof, comprise infusion pipeline, first touch force sensor, second touch force sensor, flow detector, A/D converter and data processor, it is characterized in that any 1 A point place is provided with first touch force sensor in the infusion pipeline, any 1 B point place is provided with second touch force sensor in the infusion pipeline, first touch force sensor and second touch force sensor are by holding wire connection traffic checkout gear, flow detector feeds back to the wriggling analgesia pump by holding wire, constitute flow monitor, first touch force sensor is connected A/D converter with second touch force sensor by holding wire, A/D converter converts Input Data Process after the pulse train to, data processor feeds back to the wriggling analgesia pump with data, constitutes trouble-shooter.

2. the flow rate detection of the wriggling analgesia pump based on flow detection and fault diagnosis thereof as claimed in claim 1 and the method for fault diagnosis is characterized in that described concrete grammar is as follows:

Infusion pipeline is under the effect of inner medicinal liquid fluid pressure, and canal path produces certain deformation to meeting, by being close to little touch force sensor of infusion pipeline outer wall, perception pipeline internal flow pressure change;

If the density of fluid is ρ, touch force sensor A is placed at any 1 A place at infusion pipeline, and corresponding pressure is P _A, flow velocity is v _A, sectional area is S _A, touch force sensor B is placed at any 1 B place at infusion pipeline, and corresponding pressure herein is P _B, flow velocity is v _B, sectional area is S _B, then A place flow equals B place flow, is v _AS _A=v _BS _B, note

$P_A+\frac{1}{2}{{\mathrm{\&rho;v}}_A}^2+{\mathrm{\&rho;gh}}_A=P_B+\frac{1}{2}{{\mathrm{\&rho;v}}_B}^2+{\mathrm{\&rho;gh}}_B$

Abbreviation gets $v_B=\sqrt{\frac{2(P_A-P_B)+2\mathrm{\&rho;g}(h_A-h_B)}{\mathrm{\&rho;}(1-{\mathrm{\&beta;}}^2)}}$

In infusion process, work as h _A=h _BThe time,

Δ P=P _A-P _B, the infusion flow rate v of B place _B

Under the condition that β does not change, directly depend on

Pulse frequency is designated as f, $f=\mathrm{d\&Delta;P}/\mathrm{dt};\mathrm{\&Delta;P}\&Proportional;{v_B}^2;$

Thereby the frequency of pulse characterizes the speed of administering medical liquids velocity variations, also namely reflects the speed of pump head extruding tube for transfusion; The intensity of pulse directly characterizes the size of infusion pipeline inner fluid pressure change, also namely reflects the size of administering medical liquids change in flow;

Note Δ P (t)=P (t)-P (t-1), expression transfusion administration t A, B two place's fluid pressures constantly is poor, by continuous detection Δ P intensity and frequency change, the variation of real-time reflection medicinal liquid flow velocity, when pulse frequency accelerates suddenly, show the injection speed quickening, infusion pipeline comes off or the equipment hardover failure; Frequency slows down, and shows that injection speed slows down, and infusion pipeline stops up or infusion pipeline wears out; When pulse strength strengthens, illustrate that dose increases, and increases administration danger; Pulse strength weakens, and pumping administration deficiency is described.

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