CN202933315U - Transfusion alarm device based on raster image measurement - Google Patents
Transfusion alarm device based on raster image measurement Download PDFInfo
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- CN202933315U CN202933315U CN 201220637504 CN201220637504U CN202933315U CN 202933315 U CN202933315 U CN 202933315U CN 201220637504 CN201220637504 CN 201220637504 CN 201220637504 U CN201220637504 U CN 201220637504U CN 202933315 U CN202933315 U CN 202933315U
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Abstract
The utility model relates to a transfusion alarm device based n raster image measurement and belongs to the technical field of medical instruments. A grate where black lines and white lines are marked is positioned on one side of a transparent transfusion flexible pipe, an imaging lens is positioned on the other side of the transparent transfusion flexible pipe, the grate is lighted by a light source, an image sensor is arranged on the other side of the imaging lens to be used for receiving a grate real image and converting the grate real image into digital image signals, the digital image signals are filtered by a digital signal processor, the widths of the white lines and the black lines on the grate and the distances between the black line and the white lines on the grate are measured by the digital signal processor, the widths and the distance are compared with the widths and the distances when no liquid is in the transfusion flexible pipe to judge whether liquid is in the transfusion flexible pipe, and a buzzer can give out alarm according to judgment results. The alarm device is simple in structure, convenient to use, low in cost and high in flexibility and reliability.
Description
Technical field
This utility model relates to a kind of infusion alarm of measuring based on raster image, belongs to technical field of medical instruments.
Background technology
Venous transfusion is one of clinical common nursing procedure, situation of all-level hospitals has a large amount of patients to accept transfusion every day, serious disproportion due to patient and the medical personnel of China, patient or its entourage are given in usually will the infuse monitoring of progress of nurse, when infusing approaching completing, patient or its entourage call out medical personnel and in time pull out pin or change dressings, otherwise will cause that transfusion drips the generation that empty, air embolism and blood back solidify the mistake accident such as injection again.Because transfusion time is mostly longer, easily make the people produce anxiety and fatigue with the long-time monitoring transfusion progress of eyes, if patient and its entourage are because of tired or boringly selects sleep, read and read newspaper or listen to the music with earphone, often can not in time find transfusion to complete and cause malpractice and doctor-patient dispute, bringing unnecessary painful and trouble to patient.
To drip a sky, air embolism, blood back in order preventing from infusing and to solidify the generation of the mistake accident such as injection again, reduce medical worker's transfusion nursing working strength, avoid simultaneously patient and entourage's thereof unnecessary participation, alleviate patient nervous and tired in infusion process, patient can be had a rest during infusing fully, people have invented the automatic monitoring transfusion progress of various infusion alarming methods, when transfusion is completed, send immediately alarm signal, the prompting medical personnel in time pull out pin or change dressings, and avoid occuring because of the malpractice that the transfusion mistake causes.
The method that realizes at present infusion alarming mainly contains following three kinds:
(1) electrode method.Venous transfusion is generally aqueous solution, has stronger electric conductivity.Insert 2 electrodes from mouth of infusion bottle, when in infusion bottle, solution being arranged, the galvanic circle that solution and electrode form is in "on" position, and buzzer can not send alarm sound; When there is no solution in infusion bottle, 2 electrodes are in off-state, and buzzer sends alarm sound.The shortcoming of electrode method is that alarm device needs contact liq, easily brings pollution, has potential safety hazard.
(2) gravimetric method: utilize spring scale and lever principle to measure the weight of infusion bottle, judge according to the weight change of liquid in infusion bottle whether transfusion is completed, although method is simple, but because different liquid is not identical with different infusion bottle (bag) quality, therefore can't provide alarm signal accurately, be difficult to practical application.
(3) photoelectric method: place respectively a luminescent device and a photelectric receiver in the both sides of infusion tube, as shown in Figure 1, and in Fig. 1, the 1st, luminescent device, the 2nd, infusion tube, the 3rd, photelectric receiver, the 4th, signal processing circuit, the 5th, buzzer.Utilize the difference of aqueous solution and air refraction in infusion tube, judge whether transfusion is completed.When in infusion tube, liquid being arranged, liquid in infusion tube is equivalent to a cylindrical lens, and the light focusing that luminescent device is sent is to photelectric receiver, and the light intensity that photelectric receiver receives is larger, the electric current that photelectric receiver output is larger, buzzer can not send alarm sound; When there is no liquid in infusion tube, air in infusion tube does not produce refraction effect, and the light that luminescent device sends only has sub-fraction to project on photelectric receiver, the light intensity that photelectric receiver receives a little less than, the electric current that photelectric receiver output is very little, buzzer sends alarm sound.Photoelectric method utilizes the light intensity signal that photelectric receiver receives to change to judge whether transfusion is completed, be vulnerable to the impact that environmental light intensity changes (daytime, night), light disturbs (turn on light, turn off the light) and liquid color (light transmittance) to change, wrong report very easily occurs, fail to report phenomenon, reliability is lower, there is no actual application value.
Above-mentioned three kinds of infusion alarming methods just exist obvious safety and reliability problem on principle, therefore be difficult to form product and apply.
Summary of the invention
The purpose of this utility model is to propose a kind of infusion alarm of measuring based on raster image, employing changes insensitive raster image measurement to environmental disturbances (light intensity changed, turns on light, turned off the light day and night) and liquid color (light transmittance), avoid from measuring principle the interference that environmental light intensity changes, light disturbs and the liquid color variation brings, improve sensitivity and the reliability of infusion alarming.
The infusion alarm based on the raster image measurement that the utility model proposes comprises:
Luminescent device as lighting source, carries out Uniform Illumination to the grating that is carved with black and white line, to improve the contrast of raster image;
Grating is used for as standard pattern, by forming raster image after transparent infusion tube;
Imaging len is used for converting the grating virtual image that transparent infusion tube amplifies to the grating real image;
Imageing sensor is used for the optics real image that imaging len forms is converted to data image signal, and sends data image signal to signal processor;
digital signal processor, the data image signal that is used for the output of real-time image acquisition sensor, carry out filtering, remove the noise jamming in image, and set when being full of liquid in transparent infusion tube on grating that on the width of black and white line and grating, the spacing between black and white line is judgment threshold, digital signal processor detects the spacing between black and white line on the width of black and white line on grating and grating in real time, the width and the spacing that detect are compared with respective threshold, when the spacing between black and white line on the width of black and white line on grating and grating is contracted to 50% when above of threshold value, judge no liquid in transparent infusion tube, digital signal processor sends alarm signal to buzzer, digital signal processor is connected by holding wire with imageing sensor,
Buzzer, as microphone device, after receiving the alarm signal of digital signal processor, the alarm signal of sounding, buzzer is connected with digital signal processor by holding wire.
the raster image measurement type infusion alarm that the utility model proposes, adopted the raster image measuring method, because the line thickness of raster image is only relevant with the refractive index of infusion tube medium with spacing, and change with environmental light intensity, light disturbs and liquid color changes irrelevant, therefore avoided the environmental light intensity variation from principle, light disturbs and liquid color changes the impact that brings, sensitivity and the reliability of infusion alarming have been increased substantially, having solved existing photoelectric infusion alarm method is subject to environmental disturbances and liquid color and changes the wrong report that brings and fail to report problem.
Description of drawings
Fig. 1 is the principle schematic of existing photoelectric infusion alarm device.
Fig. 2 is the raster image measurement type infusion alarm structured flowchart that the utility model proposes.
Fig. 3 is the grating standard pattern that the utility model proposes.
Fig. 4 is the digital picture of imageing sensor output, and wherein Fig. 4 (a) is the digital picture during no liquid in transparent infusion tube, and Fig. 4 (b) is the digital picture when in transparent infusion tube, liquid being arranged.
In Fig. 1 and Fig. 2, the 1st, luminescent device, the 2nd, transparent infusion tube, the 3rd, photelectric receiver, the 4th, signal processing circuit, the 5th, buzzer, the 6th, grating, the 7th, imaging len, the 8th, imageing sensor, the 9th, digital signal processor.
The specific embodiment
The infusion alarm based on the raster image measurement that the utility model proposes, its structured flowchart comprises as shown in Figure 2:
Luminescent device 1 as lighting source, carries out Uniform Illumination to the grating 6 that is carved with black and white line, to improve the contrast of raster image;
Grating 6 is used for as standard pattern, by the rear formation raster image of transparent infusion tube 2;
Imaging len 7 is used for converting the grating virtual image that transparent infusion tube amplifies to the grating real image;
Buzzer 5 is as microphone device, after receiving the alarm signal of digital signal processor, under the driving of the PWM of digital signal processor mouth output signal, periodically vibrate the alarm signal of sounding,, buzzer is connected with digital signal processor by holding wire.
The infusion alarm based on the raster image measurement that the utility model proposes, luminescent device wherein throws light on to the grating that is carved with black and white line as light source; When in infusion tube, liquid being arranged, because the refractive index of aqueous solution is 1.333, so the liquid in infusion tube is equivalent to a cylindrical lens, can carry out amplification imaging to the grating that is placed on the left side; When there is no liquid in infusion tube, because the refractive index of air is 1, so the air in infusion tube do not produce refraction effect, and infusion tube can not carry out amplification imaging to grating; Imaging len is used for the grating virtual image that infusion tube (when liquid is arranged) amplifies is formed the grating real image on imageing sensor, maybe will pass the grating light direct imaging of infusion tube (during no liquid) on imageing sensor; Imageing sensor is converted into data image signal with raster image, and sends data image signal to digital signal processor; At first digital signal processor carries out pretreatment to the data image signal of imageing sensor output, and measures grating line thickness and spacing in digital picture.If the width of grating lines and spacing during less than threshold value, show in infusion tube no liquid, the square-wave signal of digital signal processor output certain frequency directly drives the buzzer alarm signal of sounding.
In the infusion alarm based on the raster image measurement that the utility model proposes, luminescent device adopts the TLN107 infrarede emitting diode LED of Toshiba Corp, grating adopts the prototype grating photoduplication to process on glass substrate, imaging len and imageing sensor adopt the CMOS(complementary metal oxide semiconductor of 2,000,000 pixels) the complementary metal oxide semiconductors (CMOS) photographic head, digital signal processor adopts 80196 single-chip microcomputers of Intel Company, and it is the separated exciting piezoelectric buzzer of Ф 16mm that buzzer adopts diameter.
The infusion alarm based on the raster image measurement that the utility model proposes, its operation principle is:
Luminescent device carries out Uniform Illumination to the grating that is carved with black and white line, transparent infusion tube and medium wherein (liquid or air) consist of cylindrical lens, grating is placed in the focus of cylindrical lens, cylindrical lens forms a grating virtual image of having amplified in grating one side, imaging len again with the grating virtual image forming on imageing sensor, form the grating real image amplified.
The amplification of cylindrical lens is relevant with the medium refraction index in infusion tube, when the medium in infusion tube is air, does not produce refraction effect, and infusion tube can not carry out amplification imaging to grating; When the medium in infusion tube is liquid, will produce refraction effect, infusion tube is equivalent to a cylinder magnifier, can carry out amplification imaging to grating.Therefore, the grating real image line thickness on imageing sensor is only relevant with the medium refraction index in infusion tube with the spacing variation, and irrelevant with environmental disturbances and liquid light transmittance.When only having medium refraction index in infusion tube to change, the line thickness of grating real image and spacing are just returned and are changed, and environmental light intensity changes, light disturbs and liquid color changes line thickness and the spacing that does not all affect the grating real image.
Imageing sensor is converted to data image signal with the grating real image that imaging len forms, and sends data image signal to digital signal processor; At first digital signal processor carries out pretreatment to the data image signal of imageing sensor output, removes the noise jamming in image, and improves picture contrast, then carries out grating lines rim detection, obtains at last line thickness and the spacing of grating real image.
During infusion-completed, medium in infusion tube becomes air from liquid, medium refraction index becomes 1 from 1.333, line thickness and the spacing of raster image diminish suddenly, signal processor is from PWM(Pulse Width Modulation) pulse width modulation mouth output frequency is that the waveform of 2000Hz directly drives the buzzer alarm signal of sounding, the prompting medical personnel prepare pull out pin or change dressings.
In sum, the device that this utility model is reported to the police to existing photoelectric infusion improves, make the line thickness of image change only relevant with the medium refraction index in infusion tube with spacing, and irrelevant with environmental disturbances and liquid light transmittance, therefore overcome the problem that existing photoelectric infusion alarm method is responsive to environmental disturbances and liquid light transmittance, be prone to wrong report, fail to report.Photoelectric measurement type infusion alarming method of the present utility model and apparatus structure are simple, easy to use, cheap, be not subjected to the impact that environmental light intensity changes, light disturbs and liquid color changes on principle, very high sensitivity and reliability are arranged, have practical extending application value.
Claims (1)
1. infusion alarm of measuring based on raster image is characterized in that this infusion alarm comprises:
Luminescent device as lighting source, carries out Uniform Illumination to the grating that is carved with black and white line, to improve the contrast of raster image;
Grating is used for as standard pattern, by forming raster image after transparent infusion tube;
Imaging len is used for converting the grating virtual image that transparent infusion tube amplifies to the grating real image;
Imageing sensor is used for the optics real image that imaging len forms is converted to data image signal, and sends data image signal to signal processor;
digital signal processor, the data image signal that is used for the output of real-time image acquisition sensor, carry out filtering, remove the noise jamming in image, and set when being full of liquid in transparent infusion tube on grating that on the width of black and white line and grating, the spacing between black and white line is judgment threshold, digital signal processor detects the spacing between black and white line on the width of black and white line on grating and grating in real time, the width and the spacing that detect are compared with respective threshold, when the spacing between black and white line on the width of black and white line on grating and grating is contracted to 50% when above of threshold value, judge no liquid in transparent infusion tube, digital signal processor sends alarm signal to buzzer, digital signal processor is connected by holding wire with imageing sensor,
Buzzer, as microphone device, after receiving the alarm signal of digital signal processor, the alarm signal of sounding, buzzer is connected with digital signal processor by holding wire.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220637504 CN202933315U (en) | 2012-11-27 | 2012-11-27 | Transfusion alarm device based on raster image measurement |
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| Application Number | Priority Date | Filing Date | Title |
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| CN 201220637504 CN202933315U (en) | 2012-11-27 | 2012-11-27 | Transfusion alarm device based on raster image measurement |
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| CN202933315U true CN202933315U (en) | 2013-05-15 |
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| CN 201220637504 Withdrawn - After Issue CN202933315U (en) | 2012-11-27 | 2012-11-27 | Transfusion alarm device based on raster image measurement |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103335980A (en) * | 2013-05-16 | 2013-10-02 | 宁波工程学院 | Liquid refractive index measurement device |
| CN103706003A (en) * | 2012-11-27 | 2014-04-09 | 紫光股份有限公司 | Infusion alarm method and device based on raster image measurement |
-
2012
- 2012-11-27 CN CN 201220637504 patent/CN202933315U/en not_active Withdrawn - After Issue
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103706003A (en) * | 2012-11-27 | 2014-04-09 | 紫光股份有限公司 | Infusion alarm method and device based on raster image measurement |
| CN103706003B (en) * | 2012-11-27 | 2016-01-20 | 紫光股份有限公司 | A kind of transfusion alarm method based on raster image measurement and device thereof |
| CN103335980A (en) * | 2013-05-16 | 2013-10-02 | 宁波工程学院 | Liquid refractive index measurement device |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| AV01 | Patent right actively abandoned |
Granted publication date: 20130515 Effective date of abandoning: 20160120 |
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| C25 | Abandonment of patent right or utility model to avoid double patenting |