CN201311642Y - Portable opisthenar vein collecting instrument - Google Patents

Abstract

The utility model relates to a portable dorsal hand vein image acquisition device, which belongs to the biological feature acquisition part in the field of human biological authentication. The utility model portable hand back vein collection instrument is embedded with an infrared filter and an infrared lamp on the front of the shell, and the infrared lamp is evenly distributed around the infrared filter, and is also embedded with an infrared distance sensing module; the inside of the shell is equipped with an optical lens , the rear of the optical lens is fixedly connected with the CMOS image sensor, the image sensor is imaged in the imaging processing circuit, and the imaging processing circuit transmits the collected hand vein picture to the computer; the imaging processing circuit sends the signal of the infrared lamp control module to adjust the infrared lamp. working status. The utility model can be used in hand vein recognition systems, and is small in size and easy to carry, and can be used in different computer hand vein recognition systems by utilizing the USB plug and play function.

Description

Portable dorsal hand vein collection instrument

technical field

The utility model belongs to the technical field of human body biological identification, and specifically designs a portable dorsal vein collection instrument.

Background technique

Human biometric identification is based on the biological characteristics of the human body, such as the inherent texture characteristics of the human body (such as iris, fingerprints, palmprints, and faces, etc.) or behavioral characteristics (such as signatures, keyboard typing, voice, and letters, etc.) to identify biological individuals. Vein recognition based on biological body is a new non-contact biometric identification technology, which has a wide range of applications in the fields of security protection and identity authentication. The development of vein recognition began around 2000, and the system development was not yet mature and perfect, but these did not hinder researchers' strong interest in it. With the unique, safe and reliable characteristics of human warming veins, the possibility of counterfeiting or plagiarism is eliminated. And in the process of commercialization, we also found that compared with other biometric identification technologies, it has the advantages of stable work, convenient and comfortable use, all of which have inspired people's desire to explore and improve this technology.

At present, the research and application of vein identity authentication is relatively successful in Japan. As early as 2000, the central research laboratory of Hitachi Corporation of Japan took the lead in successfully developing a person recognition system that can perform near-infrared imaging of finger veins. This recognition system is better than voice detection. And facial recognition systems are more accurate and not as contagious or uncomfortable as fingerprint recognition, iris scans, and retinal scans. Subsequently, major companies in Japan, as well as companies or scientific research institutions in Singapore and China have invested in the field of vein recognition. Although there has been a lot of research on the hand vein identity authentication system in China, and the related algorithms and applications have been initially developed, but the final authentication product has not been widely used. The only example is that developed by Shenzhen Keanxin Co., Ltd. , the back-of-hand venous access control system used in the 11th World Women's Softball Championship.

Contents of the invention

The purpose of this utility model is to design a portable dorsal vein collection instrument, to reduce the volume of this kind of equipment, so that it is easy to carry and use.

In order to achieve the above purpose, the utility model provides a portable hand vein collection instrument, which is embedded with an infrared filter and an infrared lamp on the front of the shell, and the infrared lamp is evenly distributed around the infrared filter, and is also embedded with an infrared distance Induction module; the inside of the housing is provided with an optical lens, the rear of the optical lens is fixedly connected with the CMOS image sensor, the image sensor is imaged in the imaging processing circuit, and the imaging processing circuit transmits the collected hand vein pictures to the computer; the imaging processing circuit gives Infrared lamp control module signal to adjust the working state of the infrared lamp.

The infrared lamp is an infrared light-emitting diode with a wavelength of 850nm, and the filtering range of the infrared filter is also 850nm.

The imaging processing circuit includes a DSP chip, a video FIFO, a memory, a USB interface, and an infrared lamp control module interface, and the imaging processing circuit is connected with the shell.

The infrared lamp control module is a control switch, which controls the opening and closing of the infrared lamp.

Compared with the prior art, the utility model has the following advantages and positive effects due to the adoption of the above-mentioned technical scheme: novel structure, small volume, convenient use and low cost.

Description of drawings

Through the following description of the embodiments of the present invention in conjunction with the accompanying drawings, the purpose, specific structural features and advantages of the present invention can be further understood. Among them, the attached figure is:

Fig. 1 is the structural representation of the utility model.

Fig. 2 is a schematic front view of the utility model.

Fig. 3 is a schematic diagram of the imaging processing circuit module of the present invention.

In the figure: 1. Infrared lamp, 2. Infrared filter, 3. Optical lens, 4. cmos image sensor, 5. Infrared lamp and infrared distance sensing module control line, 6. USB cable, 7. Imaging processing circuit, 8. Infrared distance sensing module, 9. Shell, 71. Video FIFO, 72. DSP chip, 73. USB interface, 74. Infrared lamp control module, 75. Infrared distance sensing control interface, 76. Storage chip.

Detailed ways

As shown in Figure 1, the infrared lamp 1 and the infrared filter 2 are fixed on the casing 9, the optical lens 3 and the CMOS image sensor 4 are connected in series to form a central axis, the imaging circuit module 7 is fixed on the casing 9, the infrared lamp 1 and the infrared The distance sensing module control line 5 connects the imaging circuit module 7 with the infrared lamp 1 and the infrared distance sensing module 8 . When the infrared distance sensing module 8 senses that the back of the user's hand is approaching, it gives the imaging circuit module 7 a working signal, turns on the infrared lamp 1 to take a picture of the vein on the back of the hand and transmits it to the computer through the USB connection line 6 .

As shown in FIG. 2 , six infrared lamps 1 are evenly distributed around the infrared filter 2 , and the infrared distance sensing module 8 is embedded in the front of the housing 9 .

As shown in Figure 3, the image signal that image sensor 4 gathers is imported into video FIFO71, when video FIFO71 fills up, give DSP chip 72 signals, notify it to move the image signal of video FIFO71 in memory chip 76, when collecting a After frame image, DSP chip 72 imports a frame of image in the computer by USB interface 73, and infrared lamp distance control interface 75 inquires whether there is user's back of hand approaching, if just give DSP chip 72 start working signal, DSP chip 72 passes infrared light The lamp control module 74 turns on the infrared lamp 1; if not, the DSP chip 72 turns off the infrared lamp 1 through the infrared lamp control module 74, and the whole system enters a dormant low power consumption state.

Although the utility model has been described above according to the preferred embodiment, this does not mean that the scope of the utility model is only limited to the above-mentioned structure, as long as the structures covered by the claims of the utility model are all within the scope of protection Inside. Equivalent alternative structures that can be easily developed by those skilled in the art after reading the above descriptions, all equivalent changes and modifications made without departing from the spirit and scope of the utility model shall be covered by the utility model patent within range.

Claims (4)

1. portable hand dorsal vein Acquisition Instrument is characterized in that: on the front of shell, be embedded with infrared filter and infrared lamp, described infrared lamp be evenly distributed on infrared filter around, also be embedded with in addition one infrared apart from induction module; The inside of described shell is provided with optical lens, and optical lens rear portion and cmos image sensor are connected, and imageing sensor images in the imaging processing circuit, and the imaging processing circuit is transferred to the hand back vein picture that collects on the computing machine; Described imaging processing circuit is given infrared lamp control module signal to adjust the duty of infrared lamp.

2. portable hand dorsal vein Acquisition Instrument according to claim 1 is characterized in that: described infrared lamp is that wavelength is the infrarede emitting diode of 850nm, and the filter range of infrared filter is also at 850nm.

3. portable hand dorsal vein Acquisition Instrument according to claim 1 is characterized in that: described imaging processing circuit comprises dsp chip, video FIFO, storer, USB interface, infrared lamp control module interface, and this imaging processing circuit is connected with described shell.

4. portable hand dorsal vein Acquisition Instrument according to claim 1 is characterized in that: described infrared lamp control module is a gauge tap, the opening and closing of control infrared lamp.

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