Portable near-infrared craniocerebral detection device

Abstract

The utility model provides a portable near-infrared craniocerebral detection device. The portable near-infrared craniocerebral detection device comprises a shading shell, a near-infrared light emitting unit, a lens unit and a photoelectric detection unit which are sequentially arranged. The near-infrared light emitting unit is used for emitting near-infrared light, and the near-infrared light transmitted out of the brain reaches the photoelectric detection unit through the lens unit. According to the utility model, portability is realized on the premise of ensuring certain detection precision.

Description

TECHNICAL FIELD

[0001] The utility model relates to near infrared detection equipment field, concretely relates to a portable near infrared brain detection device. BACKGROUND

[0002] When detecting intracranial injury, the commonly used is adopting CT scanning technology, but the CT equipment cost is high, and the volume is big, is not favorable to the detection of patient under the sudden situation, and for the patient who needs to monitor the brain problem for a long time, has certain safety risk. UTILITY MODEL CONTENT

[0003] To solve the above technical problem, the utility model provides a portable near infrared brain detection device.

[0004] To achieve the above purpose, the utility model adopts the following technical scheme:

[0005] A portable near infrared brain detection device, including light shielding shell, near infrared light emitting unit, lens unit, slide rail device, carousel device and photoelectric detection unit, the center line of lens unit is parallel with the center line of near infrared light emitting unit, near infrared light emitting unit is aimed at laser emission opening on light shielding shell, and the light shielding shell is pasted to the brain of the person to be detected at the laser emission opening, emits near infrared light, and after the near infrared light transmits out the brain, reaches photoelectric detection unit through lens unit, near infrared light emitting unit includes three near infrared light sources, the wave band of three near infrared light sources is 630nm, 740nm and 808nm respectively, and the rated power is 5mw, and is arranged on carousel device with uniform difference 120 °, near infrared light emitting unit, lens unit, slide rail device, carousel device and photoelectric detection unit are placed in light shielding shell, and lens unit opening is arranged in the position of light shielding shell aiming at lens unit.

[0006] Further, the lens unit includes aspherical transmission lens, optical filter and collimating mirror from inside to outside in sequence, and detection light enters photoelectric detection unit to detect voltage value by collimating mirror.

[0007] Further, the slide rail device contains track, and lens unit and photoelectric detection unit are connected to the track, and the track drives the fixed lens unit and photoelectric detector to move, which is used for dynamically adjusting focal length and detection distance, and meets the needs of different detection scenes.

[0008] Further, the carousel device includes main bearing and turntable, which is used for fixing three different wave band near infrared light sources, when using, the turntable is rotated to the appropriate position and locked to complete the fixed measurement, and the turntable is rotated to switch different wave bands.

[0009] Furthermore, the photoelectric detection unit includes an avalanche photodiode and a data acquisition card. The light focused behind the lens unit is detected by the avalanche photodiode, and the generated current signal is converted into a voltage signal by a transimpedance amplifier. The voltage signal is then amplified through multiple stages and acquired by the data acquisition card.

[0010] Furthermore, the light-shielding housing is used to fix the near-infrared light emitting unit, the lens unit, the slide rail device, the turntable device, and the photoelectric detection unit.

[0011] Beneficial effects:

[0012] The near-infrared light detection used in this invention is portable, and the detection accuracy is guaranteed while maintaining portability. Attached Figure Description

[0013] Fig. 1 This is a schematic diagram of a portable near-infrared cranial detection device according to the present invention;

[0014] Fig. 2 This is a schematic diagram of the launch structure;

[0015] Fig. 3 This is a diagram showing the complete assembly of the portable near-infrared cranial detection device of this utility model.

[0016] In the attached diagram, the following labels are used: 1 is the lens unit, 2 is the slide rail device, 3 is the photoelectric detection unit, 4 is the near-infrared light emitting unit, 5 is the turntable device, 6 is the light-shielding shell, 7 is the laser emission opening, and 8 is the lens unit opening. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention. Furthermore, the technical features involved in the various embodiments of this invention described below can be combined with each other as long as they do not conflict with each other.

[0018] like Figs. 1-3 As shown, this utility model discloses a portable near-infrared cranial detection device comprising a detection structure and a transmission structure. The detection structure includes a lens unit 1, a slide rail device 2, and a photoelectric detection unit 3. The transmission structure includes a near-infrared light emitting unit 4 and a turntable device 5.

[0019] The lens unit 1 includes, from the inside out, an aspherical transmission lens, a filter, and a collimating lens.

[0020] The slide rail device 2 is mounted on the bracket and can slide.

[0021] The near-infrared light emitting unit 4 is used for emitting near-infrared light, and the near-infrared light is transmitted out of the brain and skull and reaches the photoelectric detection unit 3 through the lens unit 1.

[0022] The near-infrared light emitting unit 4 comprises a plurality of near-infrared light sources, such as three near-infrared light sources, and the near-infrared light sources emit near-infrared light of different wave bands.

[0023] The near-infrared light source is fixed on the rotating disc device 5, and the free switching of the near-infrared light source can be realized.

[0024] The photoelectric detection unit 3 comprises an avalanche photodiode and a collection card, the light gathered through the lens unit 1 is detected through the avalanche photodiode, the current signal generated is converted into a voltage signal through a transimpedance amplifier, and the voltage signal is collected by the collection card after multi-stage amplification.

[0025] The near-infrared light emitting unit 4, the lens unit 1, the sliding rail device 2, the rotating disc device 5 and the photoelectric detection unit are all installed in the light-shielding shell 6.

[0026] As shown in Fig. 3 The detection structure and the emitting structure are arranged side by side, when the utility model is used, the staff selects the near-infrared light wavelength to be used, fixes the rotating disc device 5, covers the light-shielding shell 6, and then the detection can be started.

[0027] The utility model is simple and convenient in overall design, the laser used is small in power and light in volume, is installed on the rotating table and can be switched at any time, the simplified lens group design controls the volume under the premise of ensuring the precision, so the overall size is small and the utility model is portable.

[0028] Preferably, the three near-infrared light sources are 630 nm, 740 nm and 808 nm in wave band, and the rated power is 5 mW. The near-infrared light sources are arranged on the rotating disc device 5 at an interval of 120°.

[0029] The center line (lens focal point extension line) of the lens unit 1 is parallel to the center line (laser center extension line) of the near-infrared light emitting unit 4. The light-shielding shell 6 is provided with a laser emission hole 7 for laser emission, and the lens unit is provided with a lens unit hole 8 for introducing light into the lens unit 1. The near-infrared light emitting unit 4 is aligned with the laser emission hole 7 on the light-shielding shell 6, and the light-shielding shell 6 is tightly attached to the cranial brain (the detection position is located at the laser emission hole 7) at the laser emission hole 7, and emits near-infrared light, which is transmitted through the cranial brain and then passes through the lens unit 1 to reach the photoelectric detection unit 3. The detection light enters the lens unit 1 from the lens unit hole 8, enters the photoelectric detection unit 3 through the collimating mirror, and detects the voltage value. The slide rail device 2 includes a track, and the lens unit 1 and the photoelectric detection unit 3 are fixed to the slide rail device 2. Adjusting the slide rail device 2 drives the fixed lens unit 1 and photoelectric detection unit 3 to move, which is used to dynamically adjust the focal length and detection distance to meet the needs of different detection scenes.

[0030] Preferably, the rotating disc device 5 is composed of a main bearing and a rotating table, which is mainly used to fix three different waveband near-infrared light sources. In use, the rotating table is rotated to the appropriate position and locked to complete the fixed measurement. When needed, the rotating table is rotated to switch different wavebands.

[0031] The photoelectric detection unit 3 includes an avalanche photodiode and a collection card. The light gathered after passing through the lens unit 1 is detected by the avalanche photodiode, and the current signal generated is converted into a voltage signal by a transimpedance amplifier. The voltage signal is amplified by multiple stages and collected by the collection card.

[0032] In use, the light-shielding shell 6 with the internal structure is placed at different parts of the cranial brain, such as the forehead, above the ears, and the back of the brain, and then the near-infrared light emitting unit 4 emits light, which passes through the laser emission hole 7 into the cranial brain, is refracted and scattered in the cranial brain, and exits the lens unit hole 8.

Claims

1. A portable near-infrared brain detection device, characterized by, The portable near-infrared brain detection device comprises a light-shielding shell, a near-infrared light emitting unit, a lens unit, a sliding rail device, a rotating disc device and a photoelectric detection unit; the center line of the lens unit is parallel to the center line of the near-infrared light emitting unit; the near-infrared light emitting unit is aligned with a laser emitting opening on the light-shielding shell, the light-shielding shell is tightly attached to the head of a person to be detected at the laser emitting opening, near-infrared light is emitted, and the near-infrared light is transmitted out of the head after passing through the lens unit and reaches the photoelectric detection unit; the near-infrared light emitting unit comprises three near-infrared light sources, the wave bands of the three near-infrared light sources are 630 nm, 740 nm and 808 nm respectively, the rated power is 5 mW, and the three near-infrared light sources are uniformly arranged at an interval of 120° on the rotating disc device; the near-infrared light emitting unit, the lens unit, the sliding rail device, the rotating disc device and the photoelectric detection unit are placed in the light-shielding shell, and the light-shielding shell is provided with a lens unit opening at a position aligned with the lens unit.

2. The portable near-infrared brain detection device according to claim 1, wherein, The lens unit comprises, from inside to outside, an aspheric transmission lens, a filter and a collimating lens; the detection light enters the photoelectric detection unit to be detected for a voltage value.

3. The portable near-infrared brain detection device according to claim 1, wherein, The sliding rail device comprises a track, and the lens unit and the photoelectric detection unit are connected to the track; the track is adjusted to drive the lens unit and the photoelectric detector fixed thereon to move, so as to dynamically adjust the focal length and the detection distance and meet the needs of different detection scenes.

4. The portable near-infrared brain detection device according to claim 1, wherein The rotating disc device comprises a main bearing and a rotating table, and is used for fixing the three near-infrared light sources of different wave bands; in use, the rotating table is rotated to a suitable position and is locked to complete the fixing and measurement, and the rotating table is rotated to switch the different wave bands.

5. The portable near-infrared brain detection device according to claim 1, wherein, The photoelectric detection unit comprises an avalanche photodiode and a collection card; the light gathered through the lens unit is detected by the avalanche photodiode, a current signal generated by the avalanche photodiode is converted into a voltage signal by a transimpedance amplifier, and the voltage signal is collected by the collection card after multi-stage amplification.

6. The portable near-infrared brain detection device according to claim 1, wherein, The light-shielding shell is used for fixing the near-infrared light emitting unit, the lens unit, the sliding rail device, the rotating disc device and the photoelectric detection unit.

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