CN207137111U - The capacity sensing device of high-precision drug infusion system - Google Patents
The capacity sensing device of high-precision drug infusion system Download PDFInfo
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- CN207137111U CN207137111U CN201720144316.7U CN201720144316U CN207137111U CN 207137111 U CN207137111 U CN 207137111U CN 201720144316 U CN201720144316 U CN 201720144316U CN 207137111 U CN207137111 U CN 207137111U
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Abstract
The utility model discloses a kind of capacity sensing device of high-precision drug infusion system, including infusion of drug movement parts, driving source, light source, light detection device and signal processing module；The infusion of drug movement parts push medicine by displacement and are transfused；The driving source electrically connects with light source and signal processing module, and for driving light source luminescent, the driving source sends the information of the incident light of light source to signal processing module；The light source sends incident light to infusion of drug movement parts, and the incident light is received after the reflection of infusion of drug movement parts by light detection device；The light detection device electrically connects with signal processing module, and the light detection device sends the information of the reflected light received to signal processing module；The signal processing module calculates infusion of drug movement parts shift length according to the information of the reflected light of the information of incident light, and calculates infusion of drug amount.The capacity sensing device can reach micron level measurement accuracy using contactless optical electrical measurement, and stability is good.
Description
Technical field
A kind of capacity sensing device is the utility model is related to, more particularly to a kind of capacity of high-precision drug infusion system
Sensing device, belong to medical field of sensing technologies.
Background technology
Medical medicine infusion system is the conventional therapy equipment of many diseases at present, such as syringe infusion pump, insulin pump etc..
According to the difference of infusion medicine and the difference of therapeutic modality, there is different requirements to infusion, as infusion of insulin is excessive or very few
There is fatal influence to patient, therefore the precision that is transfused and be stably the basic demand that it is transfused.And the precision being transfused is main
Dependent on the measurement accuracy to infusion amount.The popularization of current wearable Medical Devices, size and weight to sensor carry again
Very high requirement is gone out.
Existing insulin pump or syringe infusion pump uses stepper motor substantially, therefore the measurement of infusion amount substantially uses
Technology has the number of drive pulses of direct measurement stepper motor, and this is a kind of relatively low open cycle system of reliability, can not avoid " losing
Step " error, therefore the infusion of conventional medicine can only be directed to.Further technology is to increase the revolution of photoelectricity or Hall effects
Encoder, form closed-loop system so that the reliability for being transfused measurement increases substantially.But this measurement or an inter-species
The measurement connect, drive the error of machinery and cause the error of measurement with the mechanical relaxation of time, measurement stability is inadequate.Indirectly
Measurement, it is inadequate that the errors of mechanical linkages all causes measurement accuracy.Therefore directly high-precision measurement turns into the need of medical infusion
Will, particularly wearable infusion Medical Instruments needs small sensing testing technology, and Medtronic companies of the U.S. employ small
The method of linear resistance or electric capacity carrys out the infusion measurement of direct measurement insulin pump, but the resolution ratio of precision or inadequate, together
When sensor time stability it is inadequate because this is the device of Mechanical Contact frictional property.
Utility model content
The utility model provides a kind of capacity sensing device of high-precision drug infusion system, and lifting infusion of drug measures
The precision of amount.
Technical solutions of the utility model are as follows：A kind of capacity sensing device of high-precision drug infusion system, including medicine
It is transfused movement parts, driving source, light source, light detection device and signal processing module；The infusion of drug movement parts are pushed away by displacement
Pressing thing is transfused；The driving source electrically connects with light source and signal processing module, for driving light source luminescent, the driving
Source sends the information of the incident light of light source to signal processing module；The light source sends incident light to infusion of drug movement parts, institute
Incident light is stated to be received by light detection device after the reflection of infusion of drug movement parts；The light detection device and signal processing module electricity
Connection, the light detection device send the information of the reflected light received to signal processing module；The signal processing module according to
The information of the reflected light of the information of incident light calculates infusion of drug movement parts shift length, and calculates infusion of drug amount.
In a specific embodiment of the present utility model, the information of the incident light include incident light phase information and
Frequency, the information of the reflected light include the phase information of reflected light.
Further, the signal processing module simulate phase sensitivity phase difference detection or digital phase difference detect into
Penetrate light and the phase difference of reflected light.
In order to exclude phase difference detection noise, in a specific embodiment of the present utility model, including reference light reflection
Face, the light detection device include referring to reflection light detector, and the incident light is formed with reference to anti-through reference light reflective surface
Light is penetrated by being received with reference to reflection light detector, it is described that the information with reference to reflected light is sent at signal with reference to reflection light detector
Manage module.
Further, information of the signal processing module according to reflected light and the information with reference to reflected light are to reflected light
Information progress differential amplification, which removes, makes an uproar.
For the measurement accuracy of further hoist capacity sensing device, in a specific embodiment of the present utility model,
Including light splitting piece, the light splitting piece is arranged between light source and infusion of drug movement parts, and the light detection device is received by being divided
The related light that second reflected light of piece reflection is formed to reflected light, and the information of the related light is sent to signal transacting mould
Block.
Further, the information of the related light is the weak periods of coherent light.
In a specific embodiment of the present utility model, the infusion of drug movement parts are provided with grating, the reflected light
Diffraction fringe is formed by the grating, the light detection device receives diffraction fringe, and the information of the diffraction fringe is sent out
Give signal processing module.
Further, the information of the diffraction fringe be diffraction fringe displacement, the light detection device be CCD or
CMOS optical detection arrays.
The advantages of technical scheme provided by the utility model, is：Using contactless photoelectric technology improve precision and
Reliability；Using the method for optics micrometer, optical phase interferometry technology cause respectively measurement accuracy reach micron dimension,
Sub-micrometer scale；The environment resistant interference performance of measurement is improved using the method for optical modulation, while improves the signal to noise ratio of sensor；
Using optical filtering technology and infrared light technology, high s/n ratio and sensitivity are realized；Integrated using optical, mechanical and electronic integration, light source,
Probe and signal integration, improve stability and reliability.
Brief description of the drawings
Fig. 1 is the structural representation of the capacity sensing device of the high-precision drug infusion system of embodiment 1.
Fig. 2 is the structural representation of the capacity sensing device of the high-precision drug infusion system of embodiment 2.
Fig. 3 is the structural representation of the capacity sensing device of the high-precision drug infusion system of embodiment 3.
Fig. 4 is the structural representation of the capacity sensing device of the high-precision drug infusion system of embodiment 4.
Embodiment
With reference to embodiment, the utility model is described in further detail, but not as to restriction of the present utility model.
Embodiment 1
It refer to shown in Fig. 1, the capacity sensing device of the high-precision drug infusion system of the present embodiment includes infusion of drug
Device, driving source 102, light source 103, light detection device 104 and signal processing module 105.Drug infusion pumps include medicine
Pipe 100 and piston 101, piston 101 are infusion of drug movement parts, and it can connect medicine again after transmission mechanism by stepper motor
Linear pushing is done in pipe 100, medicine in medication tube 100 is pushed and completes infusion action.
Driving source 102 is used to drive light source 103 luminous, and it is electrically connected with light source 103 and signal processing module 105.Simultaneously
Driving source 102 is handled for modulation of source signal to be sent into signal processing module 105.Light source 103 uses LED or laser tube
Being lighted, its luminous parameters is determined by driving source 102, the incident light a directive infusion of drug movement parts launched by light source 103,
That is directive piston 101, set light reflection surface to reflect incident light a in the tail end of piston 101 and form reflected light b.
Light detection device 104 is anti-by light reflection surface for receiving in the homonymy of infusion of drug movement parts with light source setting 103
The reflected light b to be formed is penetrated, light detection device 104 includes the phase that multiple photo-detectors are used to detect reflected light b, light detection device
104 are electrically connected with signal processing module 105, and reflected light b phase information is sent to signal processing module 105 by it.At signal
The modulation of source signal of change that reason module 105 is sent according to driving source 102 obtains incident light a phase, and according to optical detection
The phase for the reflected light b that device 104 is sent, carry out simulating phase sensitivity phase difference detection or digital phase difference detection obtains incidence
Light a and reflected light b phase difference.The phase difference is that light path of the light source 103 of modulation by reflection forms certain, is measured
Phase difference, measure 103-piston of light source, 101 tail ends-optical detection with reference to the frequency can of the light velocity and modulation of source signal
The distance of device 104, and then the displacement of piston 101 is extrapolated, then according to the displacement of piston 101 and infusion of drug amount
Fixed relationship can obtain corresponding infusion of drug amount.Wherein the displacement of piston 101 can with the fixed relationship of infusion of drug amount
Obtained by the measurement carried out in advance.
Embodiment 2
It refer to shown in Fig. 2, the capacity sensing device of the high-precision drug infusion system of the present embodiment includes infusion of drug
Device, driving source 202, light source 203, light detection device, with reference to light reflection surface 206 and signal processing module 205.Infusion of drug fills
Put and include medication tube 200 and piston 201, piston 201 is infusion of drug movement parts, and it can be connected by stepper motor and is driven
Do linear pushing after mechanism in medication tube 200 again, push medicine in medication tube 200 and complete infusion action.
Driving source 202 is used to drive light source 203 luminous, and it is electrically connected with light source 203 and signal processing module 205.Simultaneously
Driving source 202 is handled for modulation of source signal to be sent into signal processing module 205.Light source 203 uses LED or laser tube
Lighted, its luminous parameters is determined by driving source 202.The incident light c directive infusion of drug movement parts launched by light source 203,
That is directive piston 201, set light reflection surface to reflect incident light c in the tail end of piston 201 and form reflected light d.Simultaneously light source 203 also to
Transmitted into reference to light reflection surface and penetrate light c, reflecting its incident light c formation with reference to light reflection surface 206 refers to reflected light e.
Light detection device is arranged on the homonymy of infusion of drug movement parts with light source 203, and light detection device is visited including reflected light
Survey device 204 and with reference to reflection light detector 204a.Light detection device 204 is wherein reflected to be used to receive by light reflection surface reflection
Into reflected light d, be used to receive the reference reflected light e reflected to form with reference to light reflection surface 206 with reference to reflection light detector 204a.
Reflection light detection device 204 includes the phase that multiple photo-detectors are used to detect reflected light d, reflection light detection device 204 and letter
Number processing module 205 is electrically connected, and reflected light d phase information is sent to signal processing module 205 by it.With reference to reflection optical detection
Device 204a is used to detect the light intensity with reference to radiating light e, and the intensity signal with reference to reflected light e is sent to signal processing module by it
205。
Signal processing module 205 includes difference amplifier, and difference amplifier utilizes the intensity signal with reference to reflected light e to anti-
The phase information for penetrating light d does differential amplification, eliminates due to reflective phase noise caused by light intensity fluctuation.Signal processing module
The 205 modulation of source signal of change sent according to driving source 202 obtain incident light c phase, and according to the anti-of elimination noise
Light d phase is penetrated, carries out simulating phase sensitivity phase difference detection or digital phase difference detection obtains incident light c and reflected light d
Phase difference.The phase difference is that light path of the light source 203 of modulation by reflection forms certain, to measure phase difference, with reference to
The frequency can of the light velocity and modulation of source signal measures the distance of 203-piston of light source, 201 tail ends-light detection device, enters
And the displacement of piston 201 is extrapolated, then can be obtained according to the fixed relationship of the displacement of piston 201 and infusion of drug amount
Corresponding infusion of drug amount.Wherein the fixed relationship of the displacement of piston 201 and infusion of drug amount can be by the measurement that carries out in advance
Obtain.
Embodiment 3
It refer to shown in Fig. 3, the capacity sensing device of the high-precision drug infusion system of the present embodiment includes infusion of drug
Device, driving source 302, light source 303, light detection device 304, light splitting piece 306 and signal processing module 305.Drug infusion pumps
Include medication tube 300 and piston 301, piston 301 is infusion of drug movement parts, and it can connect driver by stepper motor
Do linear pushing after structure in medication tube 300 again, push medicine in medication tube 300 and complete infusion action.
Driving source 302 is used to drive light source 303 luminous, and it is electrically connected with light source 303 and signal processing module 305.Simultaneously
Driving source 302 is handled for modulation of source signal to be sent into signal processing module 305.Light source 303 uses LED or laser tube
Lighted, its luminous parameters is determined by driving source 302.The incident light f directive infusion of drug movement parts launched by light source 303,
That is directive piston 301, set light reflection surface to reflect incident light f in the tail end of piston 301 and form reflected light g.Light splitting piece 306 is arranged on
Between light source 303 and piston 301, therefore the incident light f parts launched by light source 303 pass through light splitting piece 306 by the tail of piston 301
The light reflection surface reflection of section, another part directly reflect to form the second reflected light h by light splitting piece 306.
The homonymy that light detection device 304 is arranged on infusion of drug movement parts and light splitting piece 306 with light source 303 is used to receive
The second reflected light h that the reflected light g and light splitting piece 306 reflected to form by light reflection surface reflects, reflected light g and the second reflected light h
Coherent light is formed, when piston 301 moves, coherent light power changes.Light detection device 304 is used for the power for detecting coherent light
Cycle, light detection device 304 are electrically connected with signal processing module 305, and the weak periods information of coherent light is sent to signal by it
Processing module 305.The modulation of source signal and the power of the coherent light that signal processing module 305 is sent according to driving source 302
Cycle information can measure the distance of 303-piston of light source, 301 tail ends-light detection device 304, and then extrapolate piston 301
Displacement, then corresponding infusion of drug can be obtained with the fixed relationship of infusion of drug amount according to the displacement of piston 301
Amount.The fixed relationship of the wherein displacement of piston 301 and infusion of drug amount can be obtained by the measurement carried out in advance.The present embodiment can
The measurement of coherent light can also be carried out to be measured in a manner of embodiment 2, light splitting piece 306 turns into a benchmark, and measurement is lived
Relevant light intensity weak cycle, measurement accuracy can reach sub-micron during the movement of plug 301.
Embodiment 4
It refer to shown in Fig. 4, the capacity sensing device of the high-precision drug infusion system of the present embodiment includes infusion of drug
Device, driving source 402, light source 403, light detection device 404 and signal processing module 405.Drug infusion pumps include medicine
Pipe 400 and piston 401, piston 401 are infusion of drug movement parts, and it can connect medicine again after transmission mechanism by stepper motor
Linear pushing is done in pipe 400, medicine in medication tube 400 is pushed and completes infusion action.
Driving source 402 is used to drive light source 403 luminous, and it is electrically connected with light source 403 and signal processing module 405.Simultaneously
Driving source 402 is handled for modulation of source signal to be sent into signal processing module 405.Light source 403 uses LED or laser tube
Being lighted, its luminous parameters is determined by driving source 402, the incident light i directive infusion of drug movement parts launched by light source 403,
That is directive piston 401, light reflection surface and grating 406 is set to make the diffraction fringe of reflected light formation reflected light in the tail end of piston 401
j。
The homonymy that light detection device 404 is arranged on infusion of drug movement parts with light source 403 is used to receive by the tail end of piston 401
The diffraction fringe j reflected to form, light detection device 404 use detector array such as CCD or CMOS optical detections array, measure diffraction
Striped j movement, and diffraction fringe information is sent to signal processing module 405.Signal processing module 405 is according to diffraction fringe
J transverse shifting information, the tail of 403-piston of light source 401 is measured with reference to the frequency can of the light velocity and modulation of source signal
The distance of end-light detection device 404, and then the displacement of piston 401 is extrapolated, then according to the displacement of piston 401 and medicine
The fixed relationship of thing infusion amount can obtain corresponding infusion of drug amount.The wherein displacement of piston 401 and infusion of drug amount
Fixed relationship can be obtained by the measurement carried out in advance.The transverse shifting measurement of piston 401 is changed into diffraction fringe j by the present embodiment
Vertically move measurement, precision can reach micron level.
Claims (10)
1. a kind of capacity sensing device of high-precision drug infusion system, including infusion of drug movement parts, driving source, light source, light
Detection device and signal processing module；The infusion of drug movement parts push medicine by displacement and are transfused；The driving source
Electrically connected with light source and signal processing module, for driving light source luminescent, the driving source sends light source to signal processing module
Incident light information；The light source sends incident light to infusion of drug movement parts, and the incident light is through infusion of drug movement parts
Received after reflection by light detection device；The light detection device electrically connects with signal processing module, and the light detection device is to letter
Number processing module sends the information of the reflected light received；The signal processing module is according to the letter of the reflected light of the information of incident light
Breath calculates infusion of drug movement parts shift length, and calculates infusion of drug amount.
2. the capacity sensing device of high-precision drug infusion system according to claim 1, it is characterised in that the incidence
The information of light includes the phase information and frequency of incident light, and the information of the reflected light includes the phase information of reflected light.
3. the capacity sensing device of high-precision drug infusion system according to claim 2, it is characterised in that the signal
Processing module carries out simulating phase sensitivity phase difference detection or digital phase difference detection incident light and the phase difference of reflected light.
4. the capacity sensing device of high-precision drug infusion system according to claim 1, it is characterised in that including reference
Light reflection surface, the light detection device include referring to reflection light detector, and the incident light is formed through reference light reflective surface
It is described to be sent to the information with reference to reflected light with reference to reflection light detector with reference to reflected light by being received with reference to reflection light detector
Signal processing module.
5. the capacity sensing device of high-precision drug infusion system according to claim 4, it is characterised in that the signal
Information of the processing module according to reflected light and the information with reference to reflected light are removed to the information progress differential amplification of reflected light makes an uproar.
6. the capacity sensing device of high-precision drug infusion system according to claim 1, it is characterised in that including light splitting
Piece, the light splitting piece are arranged between light source and infusion of drug movement parts, and the light detection device is received by light splitting piece reflection
The related light that second reflected light is formed to reflected light, and the information of the related light is sent to signal processing module.
7. the capacity sensing device of high-precision drug infusion system according to claim 6, it is characterised in that the correlation
The information of light is the weak periods of coherent light.
8. the capacity sensing device of high-precision drug infusion system according to claim 1, it is characterised in that the medicine
Infusion movement parts are provided with grating, and the reflected light forms diffraction fringe by the grating, and the light detection device receives diffraction
Striped, and the information of the diffraction fringe is sent to signal processing module.
9. the capacity sensing device of high-precision drug infusion system according to claim 8, it is characterised in that the diffraction
The information of striped is the displacement of diffraction fringe.
10. the capacity sensing device of high-precision drug infusion system according to claim 8, it is characterised in that the light
Detection device is CCD or CMOS optical detection arrays.
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| CN201720144316.7U CN207137111U (en) | 2017-02-17 | 2017-02-17 | The capacity sensing device of high-precision drug infusion system |
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| CN201720144316.7U CN207137111U (en) | 2017-02-17 | 2017-02-17 | The capacity sensing device of high-precision drug infusion system |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106860967A (en) * | 2017-02-17 | 2017-06-20 | 苏州新生命医疗科技有限公司 | The capacity sensing device of high accuracy drug infusion system |
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- 2017-02-17 CN CN201720144316.7U patent/CN207137111U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106860967A (en) * | 2017-02-17 | 2017-06-20 | 苏州新生命医疗科技有限公司 | The capacity sensing device of high accuracy drug infusion system |
| CN106860967B (en) * | 2017-02-17 | 2023-09-29 | 苏州新生命医疗科技有限公司 | Capacity sensing device of high-precision drug infusion system |
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