CN107865635A - A combined sensor - Google Patents

Abstract

A combined sensor comprises a sensor fixing plate and a sensor, wherein the sensor is fixed in a mounting hole in the sensor fixing plate, the outer edge of the sensor fixing plate is trapezoidal, the combined sensor can realize the function of photoelectric synchronous brain activity detection, different connection modes of the combined sensor can be combined into combined detection surfaces with different sizes, shapes and detection channel numbers, a curved surface naturally attached to the appearance of a skull can be formed, and the detection requirements of the sensors of the skull with different positions and sizes can be met.

Description

A combined sensor

technical field

The invention relates to a combined sensor.

Background technique

Photoelectric synchronous brain activity detector (Near infrared spectroscopy & Electroencephalography, referred to as NEG). Functional near-infrared brain imaging (fNIRS) technology is a non-invasive optical brain function detection method, which can measure the changes of oxygenated hemoglobin (HbO ₂ ) concentration and other indicators in the blood in the corresponding areas of the cerebral cortex at multiple points, and then reflect the brain function. Cortical functional status.

In clinical practice, to locate the epileptic focus, it is generally first to judge whether the seizure symptoms correspond to the abnormal discharge waveform and location of the electroencephalogram (EEG). The 20% system determines the placement position of the electrodes, referred to as the 10-20 system. First determine the baseline: the anterior-posterior line from the nasion to the external occipital tuberosity is 100%, from the nasion to the back is FPz (frontal pole midline), and every 20% from FPz to the back is an electrode position, followed by Fz (frontal pole midline). Midline), Cz (central midline), Pz (parietal midline), Oz (occipital midline).

In recent years, a number of studies have been carried out in China, using fNIRS (near-infrared brain functional imaging system) and EEG (electroencephalogram) synchronous detection to verify whether fNIRS can achieve the same level as fMRI (functional magnetic resonance imaging) in terms of epileptic focus location. , PET (Positron Emission Tomography), and SPECT (Single Photon Emission Tomography) similar effects, and then verify the reliability and application value of photoelectric synchronous brain activity detection equipment.

Adolescents and children are in the growth period of skull head circumference, and the head circumference of adolescents and children of different ages varies greatly (33cm-34cm at birth, 46cm at the age of 1, 48cm at the age of 2, 50cm at the age of 5, and 54cm-58cm at the age of 15. ), so there are special requirements for the fixation of the sensor used in the instrument.

The existing EEG (electroencephalogram) electrode fixing method: the electrode sheet is placed with an elastic mesh sleeve, which is relatively weak, and children crying and refusing to cooperate may cause the electrode wire to fall off and interfere with the EEG signal, making it difficult to apply. Fixing method of fNIRS (Near Infrared Brain Functional Imaging System) optical signal sensor: use elastic caps to fix the electrodes. The elastic caps are easy to affect the operator, resulting in limited field of vision, not easy to expose the scalp, difficult to observe the connection between the scalp and the probe, and there are Unfavorable factors such as observation interference and noise. Chinese patent 201420536387.8 discloses a photoelectric synchronous brain function imaging device and a helmet used therein. In this patent, EEG (electroencephalogram) electrodes and fNIRS (near-infrared brain function imaging system) optical signal sensors are fixed on an octagonal plate, and each piece of material The shape is a regular octagon, and there are specific distribution of through holes arranged on it. EEG electrodes, laser light source probes, and laser receiving probes are detachably plugged into the through holes. Under the optimal design, the octagon covers 8 laser light source probes and 1 laser receiving probe are designed in the area, which can form 8 light detection channels; 8 EEG detection electrodes are also designed to correspond with the positions of the light detection channels one by one, forming 8 photoelectric synchronous detection channels . The technical solution of this patent has its own limitations, the number of electrodes is dense, and it is not conducive to combined use, and it does not completely solve the problem of bonding the sensor bracket with the curved surface of the scalp, and its practicability is poor. The shape of the traditional sensor sensor fixing plate is mostly rectangular, and there are few combination methods. It cannot be combined to form a curved surface that can fit naturally with the head, and the detection effect is poor. In addition, when the operator uses an independently installed photoelectric synchronous detection sensor for detection, the fNIRS light source, fNIRS light signal sensor, and EEG electrodes need to be fixed separately, and the detection efficiency is low.

Contents of the invention

The applicant participated in the national major scientific instrument development special project, focusing on the application of photoelectric synchronous brain activity detector (NEG) in the diagnosis and positioning of children's epilepsy. In order to overcome the defects in the prior art, the present invention provides a combined sensor. The applicant finds that when the outer edge of the sensor fixing plate is trapezoidal, it has an unexpected technical effect: the combined sensor can While realizing the function of photoelectric synchronous brain activity detection, the different connection methods of the combined sensor can be combined into a combined detection surface with different sizes, shapes and numbers of detection channels, which can form a curved surface that naturally fits the shape of the skull, and can meet the requirements of different types of sensors. The detection requirements of the location and size of the head.

The invention provides a combined sensor, which is characterized in that the combined sensor includes a sensor fixing plate and a sensor, the sensor is fixed in a mounting hole on the sensor fixing plate, and the shape of the outer edge of the sensor fixing plate is trapezoidal.

Optionally, the aforementioned combined sensor is characterized in that the shape of the outer edge of the sensor fixing plate is an isosceles trapezoid; optionally, the width of the upper base of the isosceles trapezoid is 40-60 mm, and may be 45 mm. -55mm, optionally 48-52mm; optionally, the bottom width of the isosceles trapezoid is 50-75mm, optionally 55-70mm, optionally 58-68mm; optionally, the isosceles The lower bottom of the trapezoid is 10-23mm wider than the upper bottom, can be 10-15mm, can be 10-12mm; optionally, the height of the isosceles trapezoid is 50-70mm, can be 55-65mm, can be Selected as 58-62mm.

Optionally, the above-mentioned combined sensor is characterized in that the thickness of the sensor fixing plate is 2-6mm, optionally 3-5mm, and optionally 3-4mm; the sensor fixing plate is curved; Optionally, the arc angle of the sensor fixing plate is π/12-π/4, optionally π/10-π/5, and optionally π/9-π/6π.

Optionally, the aforementioned combined sensor is characterized in that the sensor fixing plate is made of elastic material; optionally, the elastic material includes: natural rubber, synthetic rubber or other synthetic polymer materials.

Optionally, the above-mentioned combined sensor is characterized in that the sensor includes a laser light source, a laser receiving sensor, and an EEG electrode; optionally, the laser light source is a fNIRS light source (S); optionally, the The laser receiving sensor is a fNIRS light signal sensor (D); optionally, the EEG electrode is an EEG electrode (E); optionally, the sensor includes two fNIRS light sources (S), two fNIRS light signal sensors (D), four EEG electrodes (E).

Optionally, the above-mentioned combined sensor is characterized in that the centers of the detection points of the sensor are arranged in a rectangle; optionally, the center is the apex of the rectangle, and the side length of the rectangle is 22-38mm, optionally 25-35mm, optionally 28-32mm; Optionally, the rectangle is a square; Optionally, the arrangement of the detection points of the sensor is: fNIRS (Near Infrared Brain Functional Imaging System) light source emission point ( S') is located on the two vertices of the diagonal of the square, the fNIRS light signal sensor detection point (D') is located on the two vertices of the other diagonal of the square, and the EEG electrode contacts (E') are located on the four sides of the square at the midpoint of .

Optionally, the above-mentioned combined sensor is characterized in that a connection hole (L) is also provided on the sensor fixing plate; optionally, the connection hole (L) is arranged around the sensor fixing plate; optional Optionally, the connecting holes (L) are oval or oblong; optionally, the connecting holes (L) are uniformly arranged around the sensor fixing plate.

The present invention also provides a combined photoelectric synchronous brain activity detector sensor, which is characterized in that the detector sensor includes at least one of the above-mentioned combined sensors and connecting materials; optionally, the detector sensor and the fixed cable tie Connect through the connecting hole (L) on the combined sensor; optionally, when the detector sensor includes at least two combined sensors, the connecting material passes through the connecting hole (L) between the combined sensors Connect; Optionally, the connection mode between the combined sensors includes top-top connection, bottom-bottom connection, waist-waist connection in the same direction, waist-waist connection in different directions, and dislocation connection, and the top is a sensor The upper bottom of the fixed plate, the bottom is the lower bottom of the sensor fixed plate, and the waist is the side of the sensor fixed plate; optionally, the dislocation connection includes top-bottom connection, top-waist connection, bottom-waist connection; optionally, the connection material is a flexible connection material.

The present invention also provides the use of the above combined sensor in brain function imaging.

The present invention also provides the application of the above detector sensor in brain function imaging.

The present invention also provides the use of the above-mentioned combined sensor in preparing an instrument for diagnosing epileptic focus.

The present invention also provides the use of the above detector sensor in the preparation of an instrument for diagnosing epileptic focus.

Optionally, the wires and optical fibers of the above sensors are bundled and connected to the host of the photoelectric synchronous detector.

The above connection holes are used for the connection of two combined sensors and the connection of the fixed cable tie.

According to a specific implementation manner of one aspect, the four EEG detection points of the combined sensor of the present invention are located at the very center of the four fNIRS detection channels, so that the function of photoelectric synchronous brain activity detection can be realized.

According to a specific implementation mode on the one hand, the edge of the sensor fixing plate of the combined sensor of the present invention is provided with a connection hole, which can be easily connected through a flexible connection material (such as a magic glue tie), and can be adjusted by adjusting the length and elasticity of the connection material. Adjust the distance between the two groups of sensors. The isosceles trapezoidal combined sensors can form different three-dimensional structures through different connection methods, and can be combined into combined detection surfaces with different sizes, shapes and numbers of detection channels, which can be naturally attached to the curved surface of the skull. It can be adapted to the detection of different parts of the skull; the combined sensor after splicing can be fixed on a specific area of the skull through an adjustable fixing strap, and various splicing combinations can be easily adjusted by adjusting the length and angle of the fixing strap The size is suitable for the detection of teenagers and children with different head circumferences.

The distance between the emission point of the fNIRS light source and the detection point of the fNIRS light signal sensor is 25-35mm, which can meet the ideal requirements of fNIRS detection.

In addition, when operating, those skilled in the art only need to arrange the combined sensor of the present invention in the area where detection is required, and other areas that do not require detection may not be provided, so that most of the head area can be clearly exposed to the operator's eyes. In the field of view, it is convenient to observe the contact between the scalp and the sensor probe, and make necessary adjustments to reduce the influence of interference, noise and other adverse factors on the detection.

Description of drawings

Figure 1 is a schematic plan view of the combined sensor of Example 1, wherein S is the fNIRS light source, D is the fNIRS light signal sensor, E is the EEG electrode, L is the connection hole, and J is the sensor fixing plate.

Figure 2 and Figure 3 are three-dimensional schematic diagrams of the combined sensor of Embodiment 1, wherein Figure 2 is a 3D schematic diagram of the upper angle of the combined sensor, and Figure 3 is a 3D schematic diagram of the lower angle of the combined sensor, wherein S' in Figure 3 is the fNIRS light source Emission point, D' is the detection point of fNIRS light signal sensor, E' is the EEG electrode contact.

Fig. 4, 5, 6, 7, 8 are the three-dimensional schematic diagrams of the photoelectric synchronous brain activity detector sensor of embodiment 2, 3, 4, 5, 6 respectively, wherein, Z ₁ and Z ₂ in Fig. 4 are fixed cable ties .

Detailed ways

Specific embodiments of the present invention will be described in detail below in conjunction with the accompanying drawings. It should be understood that the specific implementations described here are only used to illustrate the present invention, and are not intended to limit the present invention.

Example 1

Figures 1, 2, and 3 show a combined sensor: including a sensor fixing plate and a sensor, the sensor is fixed in the mounting hole on the sensor fixing plate, the sensor fixing plate is made of synthetic rubber, and the shape of the outer edge of the sensor fixing plate It is an isosceles trapezoid, the width of the upper base is 55mm, the width of the lower base is 65mm, the height is 60mm, and the thickness is 4mm. It is curved as a whole, and the arc angle is π/8. The sensor includes two fNIRS light sources (S), Two fNIRS optical signal sensors (D), four EEG electrodes (E), the centers of the detection points of the eight sensors are arranged in a square, with the center as the vertex, and the side length of the square is 30mm, wherein the fNIRS light source emission point (S') is located on the two vertices of the diagonal of the square, the fNIRS light signal sensor detection point (D') is located on the two vertices of the other diagonal of the square, and the EEG electrode contacts (E') are respectively located on the four sides of the square On the midpoint of the side, there are eight oblong connecting holes (L) evenly arranged around the sensor fixing plate.

The above-mentioned combined sensor can be fixed on a specific area of the head through an adjustable cable tie to achieve different detection requirements. The emitted light of the two fNIRS light sources is distinguished by loading different modulation frequencies. The arrangement of the sensors makes the two fNIRS light sources The combination of the emitted light and two fNIRS light signal sensors can form four fNIRS detection channels, and the four EEG electrode detection points are located at the midpoints of the four sides of the square, that is, at the center of the four fNIRS detection channels, so as to realize photoelectric synchronization The detection function, and, during the detection, the operator does not need to fix the sensors separately, which improves the detection efficiency.

The connecting materials in the following embodiments are not shown in the accompanying drawings, and the fixing straps in Embodiments 3-6 are not shown in the accompanying drawings.

Example 2

Figure 4 shows a combined photoelectric synchronous brain activity detector sensor: it is composed of two combined sensors of Embodiment 1 connected in the same direction through the waist-waist, that is, the two combined sensors are placed in the same direction and passed through the waist. The connecting holes are spliced together to form an eight-channel detection surface, which can be used for the detection of the parietal lobe area.

Example 3

Figure 5 shows a combined photoelectric synchronous brain activity detector sensor: it is composed of two combined sensors of Embodiment 1 through bottom-bottom connections, that is, the two combined sensors are placed in opposite directions, and connected through the bottom The holes are spliced together to form an eight-channel detection surface, which can be used for the detection of the occipital lobe and central area.

Example 4

Figure 6 shows a combined photoelectric synchronous brain activity detector sensor: it is composed of four combined sensors in Embodiment 1 through waist-waist connection, that is, the four combined sensors are placed in an arc shape in the same direction, and through The connection holes at the waist are spliced together to form a 16-channel detection surface, which can be used for the detection of parietal and temporal lobes.

Example 5

Fig. 7 is a sensor of a combined photoelectric synchronous brain activity detector: it is composed of four combined sensors of Embodiment 1 connected through the waist-waist-bottom-bottom, that is, each group has two combined sensors, and the combination of each group The sensor is spliced waist-to-waist, and then the two sets of combined sensors are connected through two pairs of bottom edges to form a 16-channel detection surface, which can be used for joint detection of adjacent areas.

Example 6

Figure 8 shows a combined photoelectric synchronous brain activity detector sensor: it is composed of eight combined sensors of Embodiment 1 through the bottom-bottom-waist-waist connection, that is, each group has two combined sensors, and each group The combined sensors are connected through the bottom-bottom, and then each group of combined sensors is connected again through two pairs of waists to form a 32-channel detection surface, which can simultaneously detect all regions of the head except the temporal lobe region.

In summary, the combined sensor can be combined into combined detection surfaces of different sizes, shapes and numbers of detection channels through different connection methods, and can form a curved surface that naturally fits the shape of the skull, which can meet the needs of sensors for different parts and sizes of the skull. It is very suitable for the detection of adolescents and children.

The above implementations are only specific examples of the present invention, but they are not intended to limit the scope of the present invention. Those skilled in the art can make appropriate modifications on this basis without departing from the spirit of the present invention, and such modifications are within the scope of the present invention.

Claims (10)

1. A combined sensor, characterized in that the combined sensor comprises a sensor fixing plate and a sensor, the sensor is fixed in a mounting hole on the sensor fixing plate, and the shape of the outer edge of the sensor fixing plate is trapezoidal. 2. The combined sensor according to claim 1, wherein the shape of the outer edge of the sensor fixing plate is an isosceles trapezoid; optionally, the width of the upper bottom of the isosceles trapezoid is 40-60mm, which can be Selected as 45-55mm, optionally 48-52mm; optionally, the bottom width of the isosceles trapezoid is 50-75mm, optionally 55-70mm, optionally 58-68mm; optionally, the The lower bottom of the isosceles trapezoid is 10-23mm wider than the upper bottom, can be 10-15mm, can be 10-12mm; optionally, the height of the isosceles trapezoid is 50-70mm, can be 55- 65mm, 58-62mm is optional. 3. The combined sensor according to claim 1 or 2, characterized in that, the thickness of the sensor fixing plate is 2-6mm, optionally 3-5mm, optionally 3-4mm; the sensor fixing plate It is curved; optionally, the arc angle of the sensor fixing plate is π/12-π/4, optionally π/10-π/5, and optionally π/9-π/6π. 4. The combined sensor according to any one of claims 1-3, wherein the sensor fixing plate is made of elastic material; optionally, the elastic material comprises: natural rubber, synthetic rubber or Other synthetic polymer materials. 5. The combined sensor according to any one of claims 1-4, wherein the sensor comprises a laser light source, a laser receiving sensor, and an electroencephalogram electrode; optionally, the laser light source is a fNIRS light source ( S); Optionally, the laser receiving sensor is a fNIRS light signal sensor (D); Optionally, the EEG electrode is an EEG electrode (E); Optionally, the sensor includes two fNIRS light sources ( S), two fNIRS light signal sensors (D), four EEG electrodes (E). 6. The combined sensor according to any one of claims 1-5, wherein the centers of the detection points of the sensor are arranged in a rectangle; optionally, the center is the apex of the rectangle, and the center of the rectangle is The side length is 22-38mm, optionally 25-35mm, optionally 28-32mm; optionally, the rectangle is a square; optionally, the arrangement of the detection points of the sensor is: fNIRS (near infrared Functional Brain Imaging System) The light source emitting point (S') is located on the two vertices of the diagonal of the square, the fNIRS light signal sensor detection point (D') is located on the two vertices of the other diagonal of the square, and the EEG electrode contacts (E') are respectively located at the midpoints of the four sides of the square. 7. The combined sensor according to any one of claims 1-5, characterized in that, a connection hole (L) is also provided on the sensor fixing plate; optionally, the connection hole (L) is set Around the sensor fixing plate; optionally, the connecting holes (L) are oval or oval; optionally, the connecting holes (L) are evenly arranged around the sensor fixing plate. 8. A combined photoelectric synchronous brain activity detector sensor, characterized in that the detector sensor comprises at least one combined sensor and connecting material according to any one of claims 1-7; optionally, the The detector sensor is connected to the fixing strap through the connection hole (L) on the combined sensor; optionally, when the detector sensor includes at least two combined sensors, the combined sensors are connected by The materials are connected through the connection hole (L); optionally, the connection methods between the combined sensors include top-top connection, bottom-bottom connection, waist-waist connection in the same direction, waist-waist connection in different directions, Dislocation connection, the top is the upper bottom of the sensor fixing plate, the bottom is the lower bottom of the sensor fixing plate, and the waist is the side of the sensor fixing plate; optionally, the dislocation connection includes top-bottom connection, Top-waist connection, bottom-waist connection; optionally, the connection material is a flexible connection material. 9. The combined sensor according to any one of claims 1-7, or the use of the detector sensor according to claim 8 in brain functional imaging. 10. The combined sensor according to any one of claims 1-7, or the use of the detector sensor according to claim 8 in preparing an instrument for diagnosing epileptic foci.