CN103272304B - The method of wriggling analgesia pump and flow rate detection and fault diagnosis - Google Patents

Abstract

The present invention relates to medical media input stream amount control device and method for diagnosing faults, be specifically related to the method for wriggling analgesia pump and flow rate detection and fault diagnosis, in infusion pipeline, any point A point place is provided with the first touch force sensor, in infusion pipeline, any point B point place is provided with the second touch force sensor, first touch force sensor and the second touch force sensor are by holding wire connection traffic checkout gear, flow detector feeds back to wriggling analgesia pump by holding wire, form flow monitor, first touch force sensor is connected A/D converter with the second touch force sensor by holding wire, A/D converter converts Input Data Process after pulse train to, data processor by data feedback to wriggling analgesia pump, analgesia pump of the present invention is while administration, by detecting the pressure and frequency that infusion pipeline inner fluid produces tube wall, provide the method for infusion administration flow speed control and fault diagnosis, realize analgesia pump to operate accurately and reliably according to set controlled pattern.

Description

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

[technical field]

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

[background technology]

At present, analgesia pump substantially all adopts peristaltic pump clinically, is constantly extruded and discharges the pumping medicinal liquid realizing continuing, but be difficult to accomplish the detection of infusion flow rate and the monitoring of infusion process by the elastic transfusion pipeline of pump head to pump.The detection major part of infusion flow rate is counted based on infrared drop; To the monitoring of infusion process, be also only confined to block or the detection of bubble, but seldom relate to infusion pipeline and particularly to wriggle the extruding aging monitoring of infusion pipeline and the falling monitoring of infusion pipeline.To the detection of infusion pipeline flow velocity, because wriggling analgesia pump belongs to micro-administration, administration range is general within 1000ml/h, the general <5mm of its infusion pipeline internal diameter, thus industrial conventional non-contact measuring technology, all be difficult to realize the infusion administration flow detection to wriggling analgesia pump as ultrasonic flow detection and Electromagnetic Flow detect, mostly adopt infrared drop to count in the market, but be difficult to realize accurate metering by external interference.

[summary of the invention]

In order to solve above-mentioned deficiency of the prior art and defect, the present invention proposes can while wriggling the analgesia pump alternately administration of extruding infusion pipeline, by detecting the pressure and frequency that infusion pipeline inner fluid produces tube wall, set up the wriggling analgesia pump of infusion administration flow-rate profile 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 in infusion pipeline, any point A point place is provided with the first touch force sensor, in infusion pipeline, any point B point place is provided with the second touch force sensor, first touch force sensor and the second touch force sensor are by holding wire connection traffic checkout gear, flow detector feeds back to wriggling analgesia pump by holding wire, form flow monitor, first touch force sensor is connected A/D converter with the second touch force sensor by holding wire, A/D converter converts Input Data Process after pulse train to, data processor by data feedback to wriggling analgesia pump, form trouble-shooter.

The present invention also comprises a kind of above-mentioned flow rate detection of 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 is to producing certain deformation, and by being close to the micro-touch force transducer of infusion pipeline outer wall, perception channel interior fluid pressure changes;

If the density of fluid is ρ, place touch force sensor A at infusion pipeline any point A place, corresponding pressure is P _a, flow velocity is v _a, sectional area is S _a, place touch force sensor B at infusion pipeline any point B place, corresponding pressure is herein 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 obtains $v_B=\sqrt{\frac{2(P_A-P_B)+2\mathrm{\&rho;g}(h_A-h_B)}{\mathrm{\&rho;}(1-{\mathrm{\&beta;}}^2)}}$

In infusion process, work as h _a=h _btime, Δ P=P _a-P _b, B place infusion flow rate v _bdirectly depend under the condition that β does not change

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

Thus the frequency of pulse characterizes the speed of administering medical liquids velocity variations, also namely reflect 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), represent that infusion administration t A, B two place fluid pressure are poor, by constantly detecting Δ P intensity and frequency change, the change of real-time reflection medicinal liquid flow velocity, particularly, when pulse frequency accelerates suddenly, show that injection speed is accelerated, infusion pipeline comes off or equipment hardover failure; Frequency slows down, and shows that injection speed slows down, infusion pipeline blocking or infusion pipeline aging; When pulse strength strengthens, illustrate that dose increases, increase administration dangerous; Pulse strength weakens, and illustrates that pumping administration is not enough.

The present invention proposes the wriggling analgesia pump based on flow detection and fault diagnosis thereof.It is while wriggling the analgesia pump alternately administration of extruding infusion pipeline, by detecting the pressure and frequency that infusion pipeline inner fluid produces tube wall, according to the parameter of medical personnel's setting, set up infusion administration flow-rate profile and fault diagnosis model, carry out data analysis, by feedback control, realize analgesia pump and operate accurately and reliably according to set controlled pattern.

[accompanying drawing explanation]

Fig. 1 is the annexation schematic diagram of embodiment 1;

Fig. 2 is the fault diagnosis flow scheme schematic diagram of embodiment 1;

1. analgesia pump 2. processes sensor A3. processes sensor B4. flow detector 5. infusion pipelines in figure.

[detailed description of the invention]

In order to make object of the present invention, technical scheme and advantage clearly understand, the present invention is further elaborated.Production equipment in the application is all the common equipment of this area, should be appreciated that specific embodiment described herein only in order to explain the present invention, is not intended to limit the present invention.

Embodiment 1:

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

In hydrodynamics, when Steady Flow is done to perfect fluid, meet law of conservation of energy, i.e. Bernoulli equation

In formula, P is fluid pressure, 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 is to producing certain deformation, and by being close to the micro-touch force transducer of infusion pipeline outer wall, perception channel interior fluid pressure changes.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 is herein 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

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

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

In infusion process, work as h _a=h _btime, Δ P=P _a-P _b, B place infusion flow rate v _bdirectly depend under the condition that β does not change we set up fault diagnosis model thus, and its diagnosis algorithm as shown in Figure 2;

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

Thus the frequency of pulse characterizes the speed of administering medical liquids velocity variations, also namely reflect 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), represents that infusion administration t A, B two place fluid pressure are poor.Show that infusion administration t A, B two place fluid pressure are poor.By continuous detected intensity and frequency change, the change of real-time reflection medicinal liquid flow velocity.In the application, the fss series touch force sensor adopting honeywell company to produce, detects every same time, then through A/D quantification treatment, records as follows:

Particularly, when pulse frequency accelerates suddenly, show that injection speed is accelerated, infusion pipeline comes off or equipment hardover failure; Frequency slows down, and shows that injection speed slows down, the blocking of possible infusion pipeline or infusion pipeline aging.When pulse strength strengthens, illustrate that dose increases, increase administration dangerous; Pulse strength weakens, and illustrates that pumping administration is not enough.

Claims (1)

1. the 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 in infusion pipeline, any point A point place is provided with the first touch force sensor, in infusion pipeline, any point B point place is provided with the second touch force sensor, first touch force sensor and the second touch force sensor are by holding wire connection traffic checkout gear, flow detector feeds back to wriggling analgesia pump by holding wire, form flow monitor, first touch force sensor is connected A/D converter with the second touch force sensor by holding wire, A/D converter converts Input Data Process after pulse train to, data processor by data feedback to wriggling analgesia pump, form trouble-shooter,

Infusion pipeline is under the effect of inner medicinal liquid fluid pressure, and canal path is to producing certain deformation, and by being close to the micro-touch force transducer of infusion pipeline outer wall, perception channel interior fluid pressure changes;

If the density of fluid is ρ, at infusion pipeline any point A place's placement first touch force sensor, corresponding pressure is P _a, flow velocity is v _a, sectional area is S _a, vertical height is h _a, at infusion pipeline any point B place's placement second touch force sensor, corresponding pressure is herein P _b, flow velocity is v _b, sectional area is S _b, vertical height is h _b, then A place flow equals B place flow, is v _as _a=v _bs _b, note β=S _b/ S _a

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

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

In infusion process, work as h _a=h _btime, Δ P=P _a-P _b, B place infusion flow rate v _bdirectly depend under the condition that β does not change

Pulse frequency is designated as f, f=d Δ P/dt; Δ P ∝ v _b ²;

Thus the frequency of pulse characterizes the speed of administering medical liquids velocity variations, also namely reflect 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), represent that infusion administration t A, B two place fluid pressure are poor, by constantly detecting Δ P intensity and frequency change, the change of real-time reflection medicinal liquid flow velocity, when pulse frequency accelerates suddenly, show that injection speed is accelerated, infusion pipeline comes off or equipment hardover failure; Frequency slows down, and shows that injection speed slows down, infusion pipeline blocking or infusion pipeline aging; When pulse strength strengthens, illustrate that dose increases, increase administration dangerous; Pulse strength weakens, and illustrates that pumping administration is not enough.