CN2484038Y - Finger-print collection instrument with pulse monitor - Google Patents
Finger-print collection instrument with pulse monitor Download PDFInfo
- Publication number
- CN2484038Y CN2484038Y CN01229659U CN01229659U CN2484038Y CN 2484038 Y CN2484038 Y CN 2484038Y CN 01229659 U CN01229659 U CN 01229659U CN 01229659 U CN01229659 U CN 01229659U CN 2484038 Y CN2484038 Y CN 2484038Y
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- China
- Prior art keywords
- finger
- pulse
- fingerprint collecting
- collecting device
- monitoring
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- Expired - Fee Related
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- Measuring Pulse, Heart Rate, Blood Pressure Or Blood Flow (AREA)
Abstract
The utility model relates to a finger-print collection instrument with a pulse monitor, which comprises a finger-print collection instrument and a pulse monitor; wherein, the front end of the finger-print collection instrument is equipped with a pulse monitor; as the finger-print collector collects the finger-prints, the number of the pulse of the finger-printer collector is tested conveniently, rapidly and accurately; the whole process is required only 2 to 3 seconds. In the laser emitting diode probe device, the laser diodes with excellent monochrome are used, the emitted infrared light is guaranteed not to have dispersion phenomenon after passing through the attenuation of finger tip, so that the reflection of sensor is sensitive and the error is reduced to minimum. The utility model is applicable to various occasions of identity authentication, medical institutions, and attendance of company.
Description
Technical field
This utility model relates to monitoring of pulse, particularly the monitoring of pulse that integrates with fingerprint collecting device.
Background technology
Common fingerprint collecting device all is merely as fingerprint collecting usefulness, by the gray level image that collects fingerprint to fingerprint at present.Developing the device with monitoring of pulse functional module on fingerprint collecting equipment has broad prospects.Usually the frequency of pulse of per minute is the index that people quite are concerned about, it can reflect the health status that people are basic.If obtain the frequency of pulse of oneself in passing when gathering fingerprint, people will find that this is a thing highly significant.
The invention summary
The purpose of this utility model provides the fingerprint collecting device that a kind of dai channel that integrates with fingerprint collecting device is fought and monitored.
For achieving the above object, dai channel fight the monitoring fingerprint collecting device comprise fingerprint collecting device and pulse monitoring device.
Wherein, pulse monitoring device comprises current driving circuit, Laser emission diode probe apparatus, electric current, voltage transitions amplifying circuit and monolithic control centre.
Wherein, Laser emission diode probe apparatus comprises light emitting diode and photoelectric sensor.
Wherein, Laser emission diode probe apparatus is a fingerstall shape, and is placed on the front end of acquisition chip.
At the front end correct position of fingerprint collecting device pulse monitoring device is installed, the convenient, fast and accurate person's that tests out the fingerprint collecting frequency of pulse when the fingerprint collecting person gathers fingerprint.Whole process required time had only for 2～3 seconds.Adopted the fabulous laser diode of monochromaticity in Laser emission diode probe apparatus, through after the decay of finger tip, guaranteeing does not have dispersion phenomenon at the infrared light that sends, makes the reflection sensitivity of induction apparatus, and error is reduced to minimum.This utility model is especially for occasion, medical institutions, company's work attendance of various authentications.
Description of drawings
Fig. 1 is the pulse collection schematic diagram.
Fig. 2 is the monitoring of pulse system block diagram.
Fig. 3 is the laser emission probe circuit diagram.
Fig. 4 is led drive circuit figure.
Fig. 5 is current/voltage conversion and pre-amplification circuit figure.
The detailed description of utility model
Below in conjunction with accompanying drawing the present invention is described.
Increasing the pulse test functional module on fingerprint collecting device, mainly is to have utilized in the abundant arterial vascular periodicity of finger tip to beat.We utilize the good laser diode of monochromaticity at design, at the one side irradiation finger tip of finger tip, at the laser intensity of the another side receiving attenuation of finger tip.Because the decay of laser is subjected to the blood oxygen concentration modulation in the arteries, so the period of change of the laser intensity that receives has just reflected pulse cycle.Shown in figure-1.
In order to be without loss of generality, suppose in finger, to have three light-absorbing ingredients: non-blood tissues, venous blood and arterial blood.Two important points are arranged in this sketch map: first is skin, and non-blood tissues and venous blood be light-absorbing constant in whole heart beat cycle; Second is a dynamic absorbed layer that increases during each Herzschlag, is caused by arterial blood.This provides theoretic support to monitoring of pulse, with the arterial blood that isolates transmission or the reflection part signal of beating, and the difference of having offset the light absorbing influence of skin pigment, finger thickness and venous blood liquid measure.
As shown in Figure 2, the basic sample frequency of system is 120Hz, monolithic control centre controls the parameter size of some system works necessity by digital-to-analogue conversion, make control more flexible, accurately, can judge system running state according to the signal of adopting at any time, inappropriate hardware controlling of sampling parameter is adjusted, make the approximate all the time optimum state that is in of system.The combination of the software and hardware of system is as a whole, has increased feedback, makes control parameter digitized simultaneously, is easy to detect, and system can visually be automatically adjusted, and has certain intelligent.In this this system, monolithic control centre controls the emission path of HONGGUANG by control logic, accepts path, gain control and direct current biasing adjustment.
The voltage of the control emission light intensity that digital-to-analogue is transformed, the process voltage-to-current is converted to the electric current of driving LED, goes driving LED luminous.The light that sends is through finger back strength reduction, and transmitted light intensity is subjected to organizing the modulation of interior artery blood flow pulsation ripple simultaneously.The photodiode of probe opposite side receives the transillumination after the modulation, and the electric current that changes obtains the voltage signal of transmitted light intensity after the current-voltage conversion, and transmitted light intensity obtains the ac voltage signal that frequency is a pulse frequency after removing DC level.This signal is delivered to monolithic control centre after through the A/D conversion and is handled, and obtains frequency of pulse after calculating, and the result is delivered to digital display system shows.
Laser emission diode probe apparatus as shown in Figure 3, pulse monitoring device is made up of light emitting diode, a photoelectric sensor (light cell) and the necessary circuit of emission infrared light, at our system, it is made finger-stall, be installed in the front end of fingerprint collecting chip.The wavelength of luminous tube and pick off, shape, Frequency Design and mounting means be carefully design all, has accomplished easy to use flexible.LED wherein adopts the good laser diode of monochromaticity, and the chromatic dispersion problem that can effectively avoid receiving terminal to occur makes test result more reliable.
Luminous tube driver module as shown in Figure 4, the function of luminous tube driver module is the timing control signal of sending according to monolithic control centre, electric current converted to respective intensities by the given drive level of digital-to-analogue conversion of controlling luminous intensity allows electric current go driving LED luminous.The basic sample frequency of system is 120Hz, so will be once luminous at driving infrarede emitting diode in 1/120 second cycle.The drive level signal and the RED_CS of analog quantization, IR_CS cooperates, and the system that makes can be through controlling the intensity and the sequential of luminous tube with cutting.
As shown in Figure 5 current/voltage conversion and preposition amplification, the photoelectric sensor in the probe is converted into current signal with the light modulating signal that receives, and the representative value of current intensity approximately is 2Ma, enters system by PROBE RE1 and PROBE RE2.Circuit shown in the last figure is actually a differential amplifier circuit, adopts three operational amplifiers to constitute.These operational amplifiers adopt the device of high-speed low-power-consumption, and function admirable is reliable.This amplifying circuit has quite high common mode rejection ratio, and noise is low, and temperature is floated little, has guaranteed the accurate amplification to differential wave.
In order to reduce external interference as far as possible, import to amplifier introducing contact pin from signal, adopted the ground connection copper sheet to do shielding protection, obvious for the electromagnetic environment impact effect of upper frequency.
Claims (4)
1. the fingerprint collecting device that dai channel is fought and monitored comprises fingerprint collecting device, it is characterized in that also comprising pulse monitoring device.
2. the fingerprint collecting device of fighting and monitoring by the described dai channel of claim 1 is characterized in that described pulse monitoring device comprises current driving circuit, Laser emission diode probe apparatus, electric current, voltage transitions amplifying circuit and monolithic control centre.
3. the fingerprint collecting device of fighting and monitoring by the described dai channel of claim 2 is characterized in that described Laser emission diode probe apparatus comprises light emitting diode and photoelectric sensor.
4. by the fight fingerprint collecting device of monitoring of claim 2 or 3 described dai channels, it is characterized in that described Laser emission diode probe apparatus makes finger-stall,
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01229659U CN2484038Y (en) | 2001-07-02 | 2001-07-02 | Finger-print collection instrument with pulse monitor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN01229659U CN2484038Y (en) | 2001-07-02 | 2001-07-02 | Finger-print collection instrument with pulse monitor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2484038Y true CN2484038Y (en) | 2002-04-03 |
Family
ID=33644471
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN01229659U Expired - Fee Related CN2484038Y (en) | 2001-07-02 | 2001-07-02 | Finger-print collection instrument with pulse monitor |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2484038Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100367912C (en) * | 2003-08-15 | 2008-02-13 | 日本电信电话株式会社 | Organism recognition system |
| CN104042220A (en) * | 2014-05-28 | 2014-09-17 | 上海思立微电子科技有限公司 | Device and method for detecting living body fingerprint |
| CN106473711A (en) * | 2015-08-28 | 2017-03-08 | 联想移动通信科技有限公司 | A kind of heartbeat acquisition method and device |
| CN109844746A (en) * | 2017-03-13 | 2019-06-04 | 华为技术有限公司 | A kind of verification method and verifying equipment |
-
2001
- 2001-07-02 CN CN01229659U patent/CN2484038Y/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN100367912C (en) * | 2003-08-15 | 2008-02-13 | 日本电信电话株式会社 | Organism recognition system |
| CN104042220A (en) * | 2014-05-28 | 2014-09-17 | 上海思立微电子科技有限公司 | Device and method for detecting living body fingerprint |
| CN106473711A (en) * | 2015-08-28 | 2017-03-08 | 联想移动通信科技有限公司 | A kind of heartbeat acquisition method and device |
| CN109844746A (en) * | 2017-03-13 | 2019-06-04 | 华为技术有限公司 | A kind of verification method and verifying equipment |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20020403 |