CN207423798U - A kind of medical integrated photometer device - Google Patents
A kind of medical integrated photometer device Download PDFInfo
- Publication number
- CN207423798U CN207423798U CN201721663764.4U CN201721663764U CN207423798U CN 207423798 U CN207423798 U CN 207423798U CN 201721663764 U CN201721663764 U CN 201721663764U CN 207423798 U CN207423798 U CN 207423798U
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- light source
- signal
- cuvette
- circuit
- amplification
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Abstract
The utility model discloses a kind of medical integrated photometer device, is primarily useful for the medicine detector device based on absorbance method or photolorimetry, which includes light source module, colorimetric cup device, photoelectric switching circuit.Wherein light source is using fixed wave length LED light source is provided, and constant-current source driving, in order to ensure light stability, by the way of controller plus constant-current driven chip, additional attenuation compensation circuit promotes the stability and durability of light source.Cuvette is one by cup holder, cuvette cup body, optical filter, trim ring, felt pad, a cavity of the compositions such as top board, lower platen, floor, plastic jacket.Photoelectric switching circuit realizes photoelectric conversion using photodiode, and puts big, filtering process and the signal processing based on logafier before menstruation, and signal is made to be amplified to the manageable analog electrical signal of AD conversion chip.
Description
Technical field
The utility model is related to medicine biochemistry detection field, especially a kind of medical integrated photometer.
Background technology
In terms of medical research and medical inspection, absorbance method or colorimetric method be more common and effective detection liquid or
The common method of fluid biochemical characteristic.Such as to the calibrating of the ingredients of the blood samples such as hemoglobin, glycosylated hemoglobin.How to have
Related Component has important research significance in the quick detection liquid fluid sample of effect.Existing photoelectric detection system often fills
Complexity, and mostly import are put, it is expensive while more single in terms of communication interface, it can not accomplish fast integration, simultaneously
It can not accomplish that the combined communication of multigroup controller detects in real time.
Utility model content
For overcome the deficiencies in the prior art, the utility model provides a kind of medical integral photometer device, this practicality
New device is simple and effective, and precision is higher, and communication interface is enriched, and using integrated design, cost is relatively low.
A kind of medical integrated photometer device, including light source module, colorimetric cup device, photoelectric switching circuit, the light
Source module includes master controller, LED light source driver, the LED light source of fixed wave length, attenuation compensation circuit, communication interface circuit,
The colorimetric cup device includes cup holder, cuvette cup body, optical filter, trim ring, felt pad, top board, lower platen, bottom plate, plastics
Cover, cuvette cup body top set conduit circular hole, and cuvette cup body middle part both ends set source ends circular hole and photosensitive end to justify respectively
Hole, tapping are closed by the way of sealing ring sealing and plastic jacket；The photoelectric switching circuit includes two pole of photoelectricity
Pipe, signal amplification circuit；The LED light source of fixed wave length stabilization under the driving of LED drive circuit launches fixed wave length
Light, veiling glare is filtered out by optical filter, tested sample flows through cuvette through conduit, after the irradiation of light source, transmitted light quilt
Photodiode receives, and faint optical signal converted electric signal by photodiode, through signal processing circuit to electric signal into
Row amplification filtering process.
The attenuation compensation circuit is by the way of PWM light modulations.
The communication interface circuit includes CAN bus, USB, RS232 serial ports, SPI, IIC communication interface, for accessing it
His automatic detection system.
The signal amplification circuit is divided into two-stage amplification, and wherein level-one amplification is put by precision operational-amplifier AD549, two level
It is big to be collectively formed using integrated logarithmic amplification chip LOG112 and voltage follower.
The utility model is by light source, and signal processing and colorimetric cup device are integrated, it is possible to provide stable LED consolidates
Determine wavelength light source, cuvette apparatus structure is simple, and signal processing is effectively faint by the way of multi-stage process and filtering process
The amplification of electric signal, the device provide multiple interfaces circuit and can conveniently be linked into automatic control equipment, have centainly general
Property.
Description of the drawings
Fig. 1 is the medical integrated photometer device mechanical construction drawing of the utility model.
Fig. 2 is the utility model system structure of device block diagram.
Fig. 3 is the utility model light source driving circuit figure.
Fig. 4 is the utility model opto-electronic conversion and signal processing circuit figure.
Specific embodiment
The utility model is described in further detail below in conjunction with the accompanying drawings.
Such as Fig. 1,2, a kind of medical integrated photometer device, including light source module, colorimetric cup device, opto-electronic conversion electricity
Road, the light source module include master controller, LED light source driver, the LED light source of fixed wave length, attenuation compensation circuit, communication
Interface circuit, the colorimetric cup device include cup holder 1, cuvette cup body 2, LED light source 3, photocell 4, optical filter 5, light source electricity
Road plate 6, trim ring 7, felt pad 8, top board 9, lower platen 10, bottom plate 11, photosensitive circuit plate 12, plastic jacket 13, cuvette cup body 2
Top sets conduit circular hole, and 2 middle part both ends of cuvette cup body set source ends circular hole and photosensitive end circular hole respectively, and tapping is adopted
It is sealed with sealing ring and the mode of plastic jacket is closed；The photoelectric switching circuit includes photodiode 15, signal amplification electricity
Road；The LED light source of the fixed wave length stablizes the light for launching fixed wave length under the driving of LED drive circuit, passes through optical filtering
Piece filters out veiling glare, and tested sample flows through cuvette through conduit 14, and after the irradiation of light source, transmitted light is connect by photodiode
It receives, faint optical signal converted electric signal, electric signal is amplified at filtering through signal processing circuit by photodiode
Reason.
If Fig. 3 is light source driving circuit, for driving chip using CAT4101, which is a linear constant current LED
Driver specifically provides high current drive capability, and the LED largely to connect can be driven to go here and there.In Fig. 3, CAT4101 uses 5V
Power supply, EN/PWM dim pin for enabled and PWM, and logically high and logic low is more than 1.4V and below 0.4V respectively, when
It when the pin puts high, enables and opens, LED drive current reaches 400 times of RSET ends electric current.In the low electricity that should hand over holding 5ms
Usually, then driving is off pattern.When using PWM light modulation when can external controller, pass through control output pulse duty factor tune
Input voltage is saved, and then realizes the adjusting to driving current.The non-essential resistance that LED current is connected to REST pins by one
It sets, LED drive current size can accurately be set by the input resistance for adjusting the pin, it is maximum up to 1A.
If Fig. 4 is opto-electronic conversion and signal processing circuit, electrooptical device uses photoelectric diode, and photodiode is
A kind of photosensitive component that can convert optical signals to electric signal, the utility model is using silicon photoelectric diode, the type
Photodiode response is fast, high sensitivity, performance are stable, measure good linearity, noise is low is widely used in photoelectric detective circuit,
Wherein the spectral response range of photoelectric diode should include the spectral characteristic of detection light source.In the utility model, photodiode
Transmitted light is converted into ultra-weak electronic signal, since photoelectric conversion belongs to low level light signal detection, the weak output signal that not only exports but also
Various noise jammings are wherein had, this just needs to ensure to ensure to reduce incidence to the greatest extent at light source incidence end in Photoelectric Detection
Light is disturbed by veiling glare, designed again at Photoelectric Detection end relevant level-one amplifying circuit into.In incident light source, we use
Optical filter, which to veiling glare filter out, ensures the relatively pure of incident light source, at the same try one's best in terms of detect environment ensure it is closed
To reduce external disturbance.Signal amplification circuit is mainly made of AD549 and LOGl12.D3 is Photoelectric Detection electricity receiver, is converted
Electric current passes through the amplified output currents of AD549 for D, and scope is between 100pA to 500uA；Level-one grade amplification module is by computing
Amplifier AD549（Such as U2 in Fig. 4）, feedback resistance R1 and C1 form, the output voltage of the level-one of amplifying circuit amplification for u=
SPR1, wherein S are the sensitivity of photodiode, and P is the luminous power of incident light.R1 provides gain amplifier, since low-light detects
General conversion signal is even lower for mV grades, so generally large according to the value of required amplification range R1.Due to amplification
The input bias current of device and input offset voltage IBiasingAnd VImbalanceThe influence of level-one amplification output voltage is respectively IBiasingR1 and（1+
R1/Rs）VImbalance, wherein Rs is the internal resistance of photodiode.Input biasing can be reduced it can be seen from above when R1 reduces
The influence of electric current and input offset voltage to output voltage, but the gain of amplifier can also reduce simultaneously.At this time when selecting amplifier
It needs to consider relevant parameter.Two level amplification is using Integrated Logarithmic Amplifiers LOG112.In Fig. 4, LM4040A-2.5 is one
Accurate voltage-reference provides an accurately reference voltage V REF, LM4040A-2.5 and precision resistance the R6 benchmark of offer
Electric current I2, C2 are frequency compensation capacitance, and size has the value range by I1 and I2 to determine；The power supply of LOGll2 uses ± 5V supplies
Electricity according to the recommendation for employing TI companies, using voltage conversion chip TPS60400, can convert the voltage of+5V
For the voltage of -5V.VLOGOUT=(0.5V) LOG (I1/I2), output voltage Vm=- (R 1/R2) VLOGOUT is inhaled by hardware realization
The measurement of light rate value.
Claims (4)
1. a kind of medical integrated photometer device, which is characterized in that including light source module, colorimetric cup device, opto-electronic conversion electricity
Road, the light source module include master controller, LED light source driver, the LED light source of fixed wave length, attenuation compensation circuit, communication
Interface circuit, the colorimetric cup device include cup holder, cuvette cup body, optical filter, trim ring, felt pad, top board, lower platen,
Bottom plate, plastic jacket, cuvette cup body top set conduit circular hole, in the middle part of cuvette cup body both ends set respectively source ends circular hole and
Photosensitive end circular hole, tapping are closed by the way of sealing ring sealing and plastic jacket；The photoelectric switching circuit includes light
Electric diode, signal amplification circuit；The LED light source of the fixed wave length is stablized under the driving of LED drive circuit to be launched admittedly
The light of standing wave length, veiling glare is filtered out by optical filter, and tested sample flows through cuvette through conduit, after the irradiation of light source, thoroughly
It penetrates light to be received by photodiode, faint optical signal converted electric signal by photodiode, through signal processing circuit to electricity
Signal is amplified filtering process.
2. the medical integrated photometer device of one kind according to claim 1, which is characterized in that the attenuation compensation circuit
By the way of PWM light modulations.
3. the medical integrated photometer device of one kind according to claim 1, which is characterized in that the communication interface circuit
Including CAN bus, USB, RS232 serial ports, SPI, IIC communication interface, for accessing other automatic detection systems.
4. the medical integrated photometer device of one kind according to claim 1, which is characterized in that amplified signal level is divided into two
Grade amplification, wherein level-one amplification by precision operational-amplifier AD549, two level amplification use integrate logarithmic amplification chip LOG112 with
And voltage follower collectively forms.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721663764.4U CN207423798U (en) | 2017-12-04 | 2017-12-04 | A kind of medical integrated photometer device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201721663764.4U CN207423798U (en) | 2017-12-04 | 2017-12-04 | A kind of medical integrated photometer device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN207423798U true CN207423798U (en) | 2018-05-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201721663764.4U Expired - Fee Related CN207423798U (en) | 2017-12-04 | 2017-12-04 | A kind of medical integrated photometer device |
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| Country | Link |
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| CN (1) | CN207423798U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782687A (en) * | 2017-12-04 | 2018-03-09 | 江苏博权医疗科技有限公司 | A kind of medical integrated photometer device |
-
2017
- 2017-12-04 CN CN201721663764.4U patent/CN207423798U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107782687A (en) * | 2017-12-04 | 2018-03-09 | 江苏博权医疗科技有限公司 | A kind of medical integrated photometer device |
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| Date | Code | Title | Description |
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| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20180529 Termination date: 20211204 |
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| CF01 | Termination of patent right due to non-payment of annual fee |