CN101644617B - Pressure detection method for injection pump - Google Patents
Pressure detection method for injection pump Download PDFInfo
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- CN101644617B CN101644617B CN 200810117718 CN200810117718A CN101644617B CN 101644617 B CN101644617 B CN 101644617B CN 200810117718 CN200810117718 CN 200810117718 CN 200810117718 A CN200810117718 A CN 200810117718A CN 101644617 B CN101644617 B CN 101644617B
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Abstract
The invention provides a pressure detection method for an injection pump. The method comprises the following steps: 1, under the condition that an injector is filled with liquid and a liquid delivery pipe is opened, sampling pressure and acquiring a zero voltage value RP corresponding to a sampled pressure value; 2, connecting a water outlet end of the liquid delivery pipe to a pressure gauge, sampling a plurality of linear variable different pressures in the liquid delivery pipe, and acquiring a first voltage value P (1) to an ith voltage value P (i) corresponding to the plurality of different pressures; and 3, calculating a step length voltage value delta P by the zero voltage value RP, the first voltage value P (1) to the ith voltage value P (i) according to a predefined algorithm. Therefore, by introducing the delta P in the calculation of pressure detection, the method can acquire the voltage value RP corresponding to the zero voltage through the sampling of real-time pressure of the opened pipe, and then acquire accurate real-time pressure value of the pipe through the zero voltage so as to solve the problem that the pressure detection is inaccurate.
Description
Technical field
The present invention relates to pressure detecting system, more specifically, relate to a kind of pressure detection method of syringe pump.
Background technology
At present, on syringe pump, the method for monitoring pressure value has following two kinds usually:
Sensor places infusion pipeline, real-time Monitoring Data, and the advantage of this method is; Data monitored is accurate, need not handle, and can reflect the current pressure value in real time; But shortcoming is that medical personnel are when changing infusion pipeline; Need to handle it separately, sensor device places machine exterior simultaneously, has also brought inconvenience for the security protection and the transportation of machine; And
Sensor places in the injection termination, perhaps places inner gear train, and real-time Monitoring Data, the advantage of this method be, does not have interference problem, signal stabilization, and shortcoming is, data monitored is not patient's a True Data.
Summary of the invention
Technical matters to be solved by this invention is, a kind of pressure detection method of syringe pump is provided, and in the calculating of pressure detection, introduces Δ P, then through zero point pressure obtain pipeline real-time pressure value accurately, thereby solved the inaccurate problem of pressure detection.
In order to solve above-mentioned the problems of the prior art; The invention provides a kind of pressure detection method of syringe pump; This method may further comprise the steps: under the condition of syringe full of liquid and open infusion pipeline, carry out force samples and obtain sampling after the pairing zero-point voltage value of force value RP; Step 2 is connected to tensimeter with the water side of infusion pipeline, a plurality of different pressures of the linear change in the infusion pipeline is sampled, and obtain the pairing first magnitude of voltage P (1) of a plurality of different pressures to i magnitude of voltage P (i); And step 3, according to pre-defined algorithm, calculate step-length magnitude of voltage Δ P to i magnitude of voltage P (i) by zero-point voltage value RP, the first magnitude of voltage P (1).
Wherein, step 1 also comprises: the syringe of full of liquid is put in the syringe pump, and connected open infusion pipeline; Under align mode, the motor entry into service of syringe pump and the piston motion in the pushing syringe; And under the open situation of infusion pipeline, the pressure in the infusion pipeline is sampled, and preserve the pressure stable value, wherein, it is zero-point voltage value RP that pressure stable is worth pairing magnitude of voltage.
Step 2 also comprises: the syringe of full of liquid is put in the syringe pump, and behind the air in the emptying infusion pipeline infusion pipeline is linked to each other with tensimeter; The motor of syringe pump under align mode entry into service with the piston motion in the pushing syringe; And a plurality of different pressures that the infusion pipeline neutral line changes are sampled, and obtain the pairing first magnitude of voltage P (1) of a plurality of different pressures to i magnitude of voltage P (i).
According to the method for the invention, pre-defined algorithm is:
ΔP(1)＝P(1)-PR；
ΔP(i)＝P(i)-P(i-1)；
ΔP＝(ΔP(1)+ΔP(2)+......+ΔP(N))/N
Wherein,
I=2,3 ... N, N are the integer more than or equal to 2; And P (1) is to P
(i) be the equal pressure voltage sample value at interval of linear change.
In addition, this method also comprises: step 4, in normal injection process, the pressure threshold corresponding threshold magnitude of voltage TP that detects pressure and basis and step-length magnitude of voltage Δ P and setting in the infusion pipeline in real time correspondingly controls.
Wherein, step 4 also comprises: from storer, read step-length magnitude of voltage Δ P; Pressure threshold is set, and threshold voltage value TP is set according to step-length magnitude of voltage Δ P and pressure threshold; In normal injection process, the motor entry into service of syringe pump is with the piston motion in the pushing syringe; Pressure in the infusion pipeline is sampled, and the pairing operational voltage value RealP of the pressure that obtains sampling; And difference and the threshold voltage value TP of operational voltage value RealP and zero-point voltage value RP compared, in difference during greater than threshold voltage value TP, the processing of reporting to the police.
Beneficial effect of the present invention is following:
Therefore; Adopt method of the present invention; In the calculating of pressure detection, introduce Δ P; Can obtain the pairing magnitude of voltage RP of pressure at zero point through the sampling of open pipeline real-time pressure, and then through zero point pressure obtain pipeline real-time pressure value accurately, thereby solved the inaccurate problem of pressure detection.
Other features and advantages of the present invention will be set forth in instructions subsequently, and, partly from instructions, become obvious, perhaps understand through embodiment of the present invention.The object of the invention can be realized through the structure that in the instructions of being write, claims and accompanying drawing, is particularly pointed out and obtained with other advantages.
Description of drawings
Accompanying drawing is used to provide further understanding of the present invention, and constitutes the part of instructions, is used to explain the present invention with embodiments of the invention, is not construed as limiting the invention.In the accompanying drawings:
Fig. 1 is the process flow diagram according to the inventive method;
Fig. 2 is the real-time pressure sampling process flow diagram when open pipeline according to the method for the invention;
Fig. 3 is according to the method for the invention at the real-time pressure sampling process flow diagram that has under the pressure status; And
Fig. 4 is the process flow diagram that detects of the real-time pressure under the normal injection state according to the method for the invention.
Embodiment
Below in conjunction with accompanying drawing the preferred embodiments of the present invention are described, should be appreciated that preferred embodiment described herein only is used for explanation and explains the present invention, and be not used in qualification the present invention.
Fig. 1 is the process flow diagram according to the inventive method.
As shown in Figure 1, this method may further comprise the steps:
S102, under the condition of syringe full of liquid and open infusion pipeline, carry out force samples and obtain sampling after the pairing zero-point voltage value of force value RP;
S104 is connected to tensimeter with the water side of infusion pipeline, a plurality of different pressures of the linear change in the infusion pipeline is sampled, and obtain the pairing first magnitude of voltage P (1) of a plurality of different pressures to i magnitude of voltage P (i); And
S106 according to pre-defined algorithm, calculates step-length magnitude of voltage Δ P by zero-point voltage value RP, the first magnitude of voltage P (1) to i magnitude of voltage P (i).
Wherein, S102 also comprises: the syringe of full of liquid is put in the syringe pump, and connected open infusion pipeline; Under align mode, the motor entry into service of syringe pump and the piston motion in the pushing syringe; And under the open situation of infusion pipeline, the pressure in the infusion pipeline is sampled, and preserve the pressure stable value, wherein, it is zero-point voltage value RP that pressure stable is worth pairing magnitude of voltage.
S104 also comprises: the syringe of full of liquid is put in the syringe pump, and behind the air in the emptying infusion pipeline infusion pipeline is linked to each other with tensimeter; The motor of syringe pump under align mode entry into service with the piston motion in the pushing syringe; And a plurality of different pressures that the infusion pipeline neutral line changes are sampled, and obtain the pairing first magnitude of voltage P (1) of a plurality of different pressures to i magnitude of voltage P (i).
According to the method for the invention, pre-defined algorithm is:
ΔP(1)＝P(1)-PR；
ΔP(i)＝P(i)-P(i-1)；
ΔP＝(ΔP(1)+ΔP(2)+......+ΔP(N))/N
Wherein,
I=2,3 ... N, N are the integer more than or equal to 2; And P (1) is to P
(i) be the equal pressure voltage sample value at interval of linear change.
In addition, this method also comprises: in normal injection process, the pressure threshold corresponding threshold magnitude of voltage TP that detects pressure and basis and step-length magnitude of voltage Δ P and setting in the infusion pipeline in real time correspondingly controls.
Wherein, in above-mentioned normal injection process, also comprise: from storer, read step-length magnitude of voltage Δ P; Pressure threshold is set, and threshold voltage value TP is set according to step-length magnitude of voltage Δ P and pressure threshold; In normal injection process, the motor entry into service of syringe pump is with the piston motion in the pushing syringe; Pressure in the infusion pipeline is sampled, and the pairing operational voltage value RealP of the pressure that obtains sampling; And difference and the threshold voltage value TP of operational voltage value RealP and zero-point voltage value RP compared, in difference during greater than threshold voltage value TP, the processing of reporting to the police.
Below, set forth the present invention through most preferred embodiment shown in the drawings.
Fig. 2 is the real-time pressure sampling process flow diagram when open pipeline according to the method for the invention.
Fig. 3 is according to the method for the invention at the real-time pressure sampling process flow diagram that has under the pressure status.
Fig. 4 is the process flow diagram that detects of the real-time pressure under the normal injection state according to the method for the invention.
Basic ideas of the present invention do, under motor rotation and pipeline opened state, set up the real-time pressure value RP of pressure at zero point, and confirm Δ P through the value that has between some of linear relationship.
The preliminary preparation of implementing is: with the syringe full of liquid; Syringe is connected with infusion pipeline, a tensimeter, a syringe pump.
Like Fig. 2, Fig. 3 and shown in Figure 4, the step of present embodiment and method are:
Sampling real-time pressure RP value, after syringe is put into the tram of pump, the motor entry into service, the RP value that begins to sample, treat that the RP value is relatively more steady after, confirm the RP value, motor shut down (the RP value obtains through the monitoring pressure sensor);
The sampling real-time pressure is confirmed Δ P, and the endpiece of infusion pipeline is connected with tensimeter, the motor entry into service; Liquid in the infusion pipeline flows in the tensimeter, adopts the force value of several linear relationships, like 30Kpa, 60Kpa, 90Kpa; Through these pressure real-time sampling values, the value that these pressure are corresponding respectively is followed successively by P1, P2 and P3, calculates Δ P1=P1-RP; Δ P2=P2-P1, Δ P3=P3-P2 calculates Δ P=(Δ P1+ Δ P2+ Δ P3)/3; And
In the normal injection process, monitor patient's pressure in real time and correspondingly control, in injection, the purpose of monitoring pressure is excessive in order to prevent line pressure in real time; Cause danger to patient, so before use pump is carried out the setting of pressure threshold, if exceed set pressure, the pump prompting is reported to the police; Stop injection at last,, be set at 30Kpa like pressure threshold so compare through the current real-time pressure value and the pressure threshold of setting; Digital quantity that 30Kpa is corresponding so and Δ P comparison greater than then handling, otherwise are not handled; In like manner, 60Kpa then compares with Δ P*2; 90Kpa then compares with Δ P*3.
Whether the pressure that can judge this moment through above computing method accurately exceeds setting value.
In sum; Adopt method of the present invention; To the inaccurate problem of above-mentioned pressure detection, a kind of pressure detection method of syringe pump is proposed, this method can be applicable to comprise in the Medical Devices that influence patient's pressure system of syringe pump; With raising pressure detection precision, thereby guaranteed the accuracy and the security of equipment in the infusion process.
More than be merely the preferred embodiments of the present invention, be not limited to the present invention, for a person skilled in the art, the present invention can have various changes and variation.All within spirit of the present invention and principle, any modification of being done, be equal to replacement, improvement etc., all should be included within protection scope of the present invention.
Claims (3)
1. the pressure detection method of a syringe pump is characterized in that, said method comprising the steps of:
Step 1, under the condition of syringe full of liquid and open infusion pipeline, carry out force samples and obtain sampling after the pairing zero-point voltage value of force value RP;
Step 2 is connected to tensimeter with the water side of said infusion pipeline, a plurality of different pressures of the linear change in the said infusion pipeline is sampled, and obtain the pairing first magnitude of voltage P (1) of said a plurality of different pressures to i magnitude of voltage P (i); And
Step 3 according to pre-defined algorithm, calculates step-length magnitude of voltage Δ P by said zero-point voltage value RP, the said first magnitude of voltage P (1) to said i magnitude of voltage P (i),
Wherein, said step 1 also comprises:
The syringe of full of liquid is put in the syringe pump, and connected open infusion pipeline;
Under align mode, the motor entry into service of said syringe pump also promotes the piston motion in the said syringe; And
Under the open situation of said infusion pipeline, the pressure in the said infusion pipeline is sampled, and preserve the pressure stable value, wherein, it is said zero-point voltage value RP that said pressure stable is worth pairing magnitude of voltage,
Said step 2 also comprises:
The said syringe of full of liquid is put in the said syringe pump, and behind the air in the said infusion pipeline of emptying said infusion pipeline is linked to each other with said tensimeter;
The motor of said syringe pump under said align mode entry into service to promote the said piston motion in the said syringe; And
Said a plurality of different pressures to said infusion pipeline neutral line changes are sampled, and obtain the pairing said first magnitude of voltage P (1) of said a plurality of different pressures to said i magnitude of voltage P (i),
Said pre-defined algorithm is:
ΔP(1)＝P(1)-RP；
ΔP(i)＝P(i)-P(i-1)；
ΔP＝(ΔP(1)+ΔP(2)+......+ΔP(N))/N
Wherein,
I=2,3 ... N, N are the integer more than or equal to 2; And
P (1) is the equal pressure voltage sample value at interval of said linear change to P (i).
2. method according to claim 1 is characterized in that, said method also comprises:
Step 4, in normal injection process, the pressure threshold corresponding threshold magnitude of voltage TP that detects pressure and basis and said step-length magnitude of voltage Δ P and setting in the said infusion pipeline in real time correspondingly controls.
3. method according to claim 2 is characterized in that, said step 4 also comprises:
From storer, read said step-length magnitude of voltage Δ P;
Said pressure threshold is set, and said threshold voltage value TP is set according to said step-length magnitude of voltage Δ P and said pressure threshold;
In said normal injection process, the motor entry into service of said syringe pump is to promote the said piston motion in the said syringe;
Pressure in the said infusion pipeline is sampled, and the pairing operational voltage value RealP of the pressure that obtains sampling; And
Difference and the said threshold voltage value TP of said operational voltage value RealP and said zero-point voltage value RP are compared, in said difference during greater than said threshold voltage value TP, the processing of reporting to the police.
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| CN 200810117718 CN101644617B (en) | 2008-08-04 | 2008-08-04 | Pressure detection method for injection pump |
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| CN 200810117718 CN101644617B (en) | 2008-08-04 | 2008-08-04 | Pressure detection method for injection pump |
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Families Citing this family (3)
| Publication number | Priority date | Publication date | Assignee | Title |
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| CN102735392B (en) * | 2012-06-28 | 2014-12-24 | 费森尤斯卡比健源（长沙）医疗科技有限公司 | Method for detecting obstruction pressure of infusion pump |
| CN104258485B (en) * | 2014-10-17 | 2016-08-24 | 中国计量科学研究院 | Infusion pump/infusion pump detector integrated correction device |
| CN113589395A (en) * | 2021-07-15 | 2021-11-02 | 桂林优利特医疗电子有限公司 | Multichannel pipeline reagent alarm detection method and device in blood analyzer |
Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10303443B3 (en) * | 2003-01-29 | 2004-10-21 | Siemens Ag | Testing method for common-rail fuel injection system for automobile IC engine with measurement of pressure in common-rail pressure reservoir after starting and disconnection of high pressure pump |
| CN101113929A (en) * | 2007-06-29 | 2008-01-30 | 五邑大学 | Method and device for detecting injection pressure of full electric injection shaping machine |
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2008
- 2008-08-04 CN CN 200810117718 patent/CN101644617B/en active Active
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE10303443B3 (en) * | 2003-01-29 | 2004-10-21 | Siemens Ag | Testing method for common-rail fuel injection system for automobile IC engine with measurement of pressure in common-rail pressure reservoir after starting and disconnection of high pressure pump |
| CN101113929A (en) * | 2007-06-29 | 2008-01-30 | 五邑大学 | Method and device for detecting injection pressure of full electric injection shaping machine |
Non-Patent Citations (2)
| Title |
|---|
| JP特开平6-109714A 1994.04.22 |
| JP特表2007-512527A 2007.05.17 |
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