A closed-loop measurement probe for physiological indicators

Abstract

The present invention discloses a physiological indication closed-loop measurement probe, belonging to the field of physiological indication measurement devices, and solving the problem that it is difficult for existing probes to ensure that the pressure on the finger is relatively stable when measuring different people or when the same measurer measures multiple times, thus bringing measurement errors. It includes an upper housing, a lower housing, and a metal probe. A pressure measurement component is provided in the upper housing at the top of the inner wall of the finger receiving cavity. The metal probe is inserted into the lower housing and slides up and down, and a position detection component is provided on the metal probe. A driving mechanism for driving the metal probe to move is provided in the lower housing. A main control circuit board is also provided in the lower housing. The pressure measurement component, the position detection component, and the driving mechanism are respectively electrically connected to the main control circuit board. The physiological indication closed-loop measurement probe of the present invention can eliminate the influence of uneven pressure on the finger caused by the housing due to individual differences, and improve the measurement accuracy and consistency.

Description

Technical Field

[0001] The present invention relates to a physiological parameter measurement device, and more particularly, to a closed-loop measurement probe for physiological parameters. Background Art

[0002] Non-invasive physiological parameter detection technology overcomes the disadvantages of traditional detection methods and can effectively meet the needs of diabetics, hypertensive patients, and patients with abnormal blood lipids for real-time and frequent monitoring of blood glucose, blood pressure, and blood lipids. It is the development direction of physiological parameter detection technology. O.K. CHO (US.Pat.NO.5975305, US.Pat.NO.20060094941, etc.) first realized a non-invasive blood glucose detection method based on the metabolic rate heat integration method. This method assumes that the heat in the body comes from the energy released by metabolism, and the main energy source for metabolism is carbohydrates. Most tissue cells generate and obtain energy through the aerobic oxidation process of glucose. Since in the equilibrium state, the (static) heat production and heat dissipation are numerically equal, the blood glucose value can be estimated by measuring physiological parameters such as the total blood oxygen content and heat dissipation.

[0003] Currently, there are two forms of the technical probe body; one is that the probe body is in a fixed state, and the other is that the main probe has a certain range of movement through a spring to adapt to individual differences (for example: the patents disclosed in Patent No.: CN108125684A, CN203182904U). However, whether the test probe is in a fixed state or adapts to the measurement of fingers of different thicknesses through spring force, due to the different pressures exerted by the finger on the outer shell, the finger is deformed to different degrees, and the pressure exerted on the finger in the main probe is also different. Therefore, it is difficult to ensure that the pressure exerted on the finger is relatively stable when different people measure or the same measurer measures multiple times, resulting in measurement errors. Summary of the Invention

[0004] The technical problem to be solved by the present invention is in view of the above-mentioned deficiencies of the prior art. The object of the present invention is to provide a closed-loop measurement probe for physiological parameters, which can eliminate the influence of uneven pressure of the outer shell on the finger caused by individual differences and improve the measurement accuracy and consistency.

[0005] The technical solution of the present invention is as follows: A physiological indicator closed-loop measurement probe, including an upper housing, a lower housing, and a metal probe. A finger receiving cavity is formed between the upper housing and the lower housing. The upper housing and the lower housing are connected by a special-shaped connecting spring. In the upper housing at the top of the inner wall of the finger receiving cavity, there is a pressure measurement component for measuring the pressure exerted on the finger. The metal probe is inserted into the lower housing in a vertically sliding manner, and a position detection component for obtaining finger position information is provided on the metal probe. A driving mechanism for driving the metal probe to move is provided in the lower housing. A main control circuit board is also provided in the lower housing. The pressure measurement component, the position detection component, and the driving mechanism are respectively electrically connected to the main control circuit board; An adjusting mechanism for adjusting the volume of the finger receiving cavity is further provided between the upper housing and the lower housing.

[0006] As a further improvement, the adjusting mechanism is located between the upper housing and the lower housing at the end of the special-shaped connecting spring away from the opening. It includes a special-shaped hole and a movable shaft. The special-shaped holes are opened on both sides of the lower housing, and the movable shafts are fixed on both sides of the upper housing. The movable shafts are inserted into the special-shaped holes, and the movable shafts and the special-shaped holes are in clearance fit.

[0007] Further, a heat dissipation armor is provided in the lower housing. The heat dissipation armor is connected to the main control circuit board, and heat dissipation fins are provided on the heat dissipation armor.

[0008] Further, a silicone grease pad is provided on the heat dissipation armor. The metal probe passes through the heat dissipation armor movably, and a heat dissipation fin is provided at the position on the metal probe corresponding to the silicone grease pad.

[0009] Further, a heat dissipation cavity is provided in the lower housing below the heat dissipation armor. Convection holes are provided on the side wall of the lower housing corresponding to the heat dissipation cavity.

[0010] Further, a flow disturbing mechanism for accelerating gas flow is provided in the heat dissipation cavity.

[0011] Further, the flow disturbing mechanism includes a first motor, a reciprocating lead screw, and a flow disturbing fin. The first motor is installed at the bottom of the inner wall of the heat dissipation cavity. The reciprocating lead screw is connected to the output end of the first motor. The flow disturbing fin is threadedly connected to the reciprocating lead screw, and the upper and lower ends of the flow disturbing fin are in contact with the bottom surface of the inner wall of the heat dissipation cavity and the bottom surface of the heat dissipation armor.

[0012] Further, the driving mechanism includes a second motor, a lead screw, and a slider. The second motor is installed in the lower housing. The lead screw is connected to the output end of the second motor. The slider is threadedly connected to the lead screw, and the slider is connected to the lower part of the metal probe. The second motor is electrically connected to the main control circuit board.

[0013] Furthermore, the pressure measurement component includes a pressure sensor, which is installed in the upper housing at the top inner wall of the finger receiving cavity, and the pressure sensor is electrically connected to the main control circuit board.

[0014] Furthermore, the position detection component includes a TOF sensor, which is installed on one side of the metal probe, and the TOF sensor is electrically connected to the main control circuit board.

[0015] Beneficial effects

[0016] Compared with the prior art, the present invention has the following advantages:

[0017] 1. For the physiological sign closed-loop measurement probe of the present invention, the upper housing and the lower housing are connected by a special-shaped connecting spring, and an adjusting mechanism is arranged between the upper housing and the lower housing. This measurement is used to detect physiological signals. During use, when encountering fingers of different thicknesses, the movable shaft of the adjusting mechanism can move in the vertical direction or fine-tune in the left-right direction along the special-shaped hole, and cooperate with the elastic force of the special-shaped connecting spring, it can automatically adapt to fingers of different thicknesses, so as to ensure that the upper housing applies a uniform force to the finger, and can eliminate the influence of uneven pressure of the housing on the finger caused by individual differences, improving the measurement accuracy and consistency.

[0018] 2. For the physiological sign closed-loop measurement probe of the present invention, through the design of the pressure measurement component, the position detection component and the driving mechanism, during use, when the finger is placed into the finger receiving cavity, the position information of the finger is obtained by the position detection component and sent to the main control circuit board. The main control circuit board controls the driving mechanism to adjust the contact between the metal probe and the finger. During this process, the pressure measurement component measures the pressure received by the finger in real time, compares it with the calibration value, and feeds it back to the main control circuit board. The main control circuit board then controls the operation of the driving mechanism to adjust the position of the metal probe again until the pressure on the finger is within a reasonable range, forming a closed-loop precise compensation, which can greatly improve the measurement accuracy and consistency.

[0019] 3. For the physiological sign closed-loop measurement probe of the present invention, by arranging a heat dissipation armor under the main control circuit board, it can achieve rapid heat dissipation of the main control circuit board, ensure the efficient operation of the main control circuit board, and by arranging a silicone grease pad on the heat dissipation armor to touch the heat sink of the metal probe, when the measurement probe is on standby, the silicone grease pad contacts the heat sink, and the heat of the metal probe can be dissipated in time, quickly resetting the thermal state of the probe to achieve repeated measurement within a short time. When the measurement probe is measuring, the silicone grease pad is separated from the heat sink to prevent problems that affect the measurement accuracy.

[0020] 4. The physiological parameter closed-loop measurement probe of the present invention is provided with a heat dissipation cavity below the heat dissipation armor, and in cooperation with a flow disturbing mechanism and convection holes, so that the air flow in the lower housing can quickly convect with the external air, thereby accelerating the cooling inside the lower housing, further accelerating the reset of the thermal state of the probe, and realizing repeated measurements in a short time. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 is a front view structural schematic diagram of the present invention;

[0022] Figure 2 is a side view partial structural schematic diagram of the present invention;

[0023] Figure 3 is a three-dimensional structural schematic diagram of the heat dissipation armor in the present invention.

[0024] Wherein: 1 - upper housing, 2 - lower housing, 3 - metal probe, 4 - special-shaped connecting spring, 5 - finger receiving cavity, 6 - pressure measurement component, 7 - position detection component, 8 - driving mechanism, 9 - main control circuit board, 10 - special-shaped hole, 11 - movable shaft, 12 - heat dissipation armor, 13 - heat dissipation fin, 14 - silicone grease pad, 15 - heat sink, 16 - heat dissipation cavity, 17 - convection hole, 18 - first motor, 19 - reciprocating lead screw, 20 - flow disturbing piece, 21 - upper silicone pad, 22 - lower silicone pad, 23 - middle housing, 81 - second motor, 82 - lead screw, 83 - slider. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0025] The present invention will be further described below with reference to specific embodiments in the drawings.

[0026] Refer to Figures 1-3, a physiological indication closed-loop measurement probe of the present invention includes an upper housing 1, a lower housing 2 and a metal probe 3. A finger receiving cavity 5 is formed between the upper housing 1 and the lower housing 2. Among them, the upper housing 1 and the lower housing 2 are connected by a special-shaped connecting spring 4. The special-shaped connecting spring 4 is a U-shaped elastic sheet. The two open sides of the special-shaped connecting spring 4 are respectively connected to the upper housing 1 and the lower housing 2. Specifically, hooks are provided at the bottom of the upper housing 1 and the top of the lower housing 2. Hanging holes are opened on both open sides of the special-shaped connecting spring 4. The special-shaped connecting spring 4 is movably buckled on the hooks through the hanging holes, so that the upper housing 1 or the lower housing 2 can move slightly left and right relative to the special-shaped connecting spring 4. A pressure measurement component 6 for measuring the pressure exerted on the finger is provided in the finger receiving cavity 5. Specifically, the pressure measurement component 6 includes a pressure sensor. The pressure sensor is installed in the upper housing 1 at the top inner wall of the finger receiving cavity 5, and the pressure sensor is electrically connected to the main control circuit board 9. The metal probe 3 is inserted into the lower housing 2 in a sliding manner up and down, and the top end of the metal probe 3 can extend through to the finger receiving cavity 5 to ensure that the metal probe 3 can contact the finger. A position detection component 7 for obtaining finger position information is also provided on the metal probe 3. Specifically, the position detection component 7 includes a TOF sensor. The TOF sensor is installed on one side of the metal probe 3, and the TOF sensor is electrically connected to the main control circuit board 9. A driving mechanism 8 for driving the metal probe 3 to move is provided in the lower housing 2. A main control circuit board 9 is also provided in the lower housing 2. Among them, the pressure measurement component 6, the position detection component 7, and the driving mechanism 8 are respectively electrically connected to the main control circuit board 9.

[0027] The physiological indication closed-loop measurement probe of the present invention, through the design of the pressure measurement component 6, the position detection component 7 and the driving mechanism 8, during use, the finger is placed into the finger receiving cavity 5. The position information of the finger is obtained by the position detection component 7 and sent to the main control circuit board 9. The main control circuit board 9 controls the driving mechanism 8 to adjust the contact between the metal probe 3 and the finger. During this process, the pressure measurement component 6 measures the pressure exerted on the finger in real time, compares it with the calibration value, and feeds it back to the main control circuit board 9. The main control circuit board 9 then controls the driving mechanism 8 to operate and adjusts the position of the metal probe 3 again until the pressure on the finger is within a reasonable range, forming a closed-loop precise compensation, which can greatly improve the measurement accuracy and consistency.

[0028] Preferably, an adjusting mechanism for adjusting the volume of the finger receiving cavity 5 is further provided between the upper housing 1 and the lower housing 2. The adjusting mechanism is located between the upper housing 1 and the lower housing 2 at the end of the special-shaped connecting spring 4 away from the opening end. It includes a special-shaped hole 10 and a movable shaft 11. The special-shaped hole 10 is a through hole with a smaller upper end and a larger lower end. The movable shaft is a cylindrical shaft, and the bottom surface of the side wall is a plane for convenient support. The special-shaped holes 10 are opened on both sides of the lower housing 2, and the movable shafts 11 are fixed on both sides of the upper housing 1. The movable shafts 11 are inserted into the special-shaped holes 10. The diameter of the movable shaft 11 is smaller than the minimum diameter of the upper end of the special-shaped hole 10, and the movable shaft 11 and the special-shaped hole 10 are in clearance fit, so that the movable shaft 11 can move up and down and can be finely adjusted left and right, thereby realizing the adjustment of the distance between the upper housing 1 and the lower housing 2 up and down, and the buffering in the left and right directions.

[0029] In the physiological indication closed-loop measurement probe of the present invention, the upper housing 1 and the lower housing 2 are connected by a special-shaped connecting spring 4, and an adjusting mechanism is arranged between the upper housing 1 and the lower housing 2. The measurement probe is used for detecting physiological signals. During use, when encountering fingers of different thicknesses, the movable shaft 11 of the adjusting mechanism can move in the vertical direction or be finely adjusted in the left and right direction along the special-shaped hole 10, and cooperate with the elastic force of the special-shaped connecting spring 4, and can automatically adapt to fingers of different thicknesses, so as to ensure that the upper housing 1 applies a uniform force to the finger, and can eliminate the influence of uneven pressure of the housing on the finger caused by individual differences, and improve the measurement accuracy and consistency.

[0030] Preferably, a heat dissipation armor 12 is provided in the lower housing 2. The heat dissipation armor 12 is made of an alloy material with good heat conduction performance. The heat dissipation armor 12 is connected to the main control circuit board 9, and heat dissipation fins 13 are provided on the heat dissipation armor 12. By arranging the heat dissipation armor 12 below the main control circuit board 9, rapid heat dissipation of the main control circuit board 9 can be realized, and the efficient operation of the main control circuit board 9 can be ensured.

[0031] Preferably, a silicone grease pad 14 is provided on the heat dissipation armor 12. The metal probe 3 movably penetrates through the heat dissipation armor 12, and a heat dissipation fin 15 is provided at a position on the metal probe 3 corresponding to the silicone grease pad 14. There is a clearance fit between the metal probe 3 and the heat dissipation armor 12 without contact, or a part of the metal probe 3 below the heat dissipation fin 15 is made of non-heat-conducting material, so as to prevent the metal probe 3 from directly contacting the heat dissipation armor 12 and causing heat dissipation during measurement, thereby affecting the measurement accuracy. By arranging the silicone grease pad 14 on the heat dissipation armor 12 to touch the heat dissipation fin 15 of the metal probe 3, when the measurement probe is on standby, the silicone grease pad 14 contacts the heat dissipation fin 15, and the heat of the metal probe 3 can be dissipated in time, and the thermal state of the probe can be quickly reset to realize repeated measurement within a short time. When the measurement probe is measuring, the silicone grease pad 14 is separated from the heat dissipation fin 15 to prevent problems affecting the measurement accuracy.

[0032] Preferably, a heat dissipation cavity 16 is provided in the lower housing 2 below the heat dissipation armor 12. Convection holes 17 are provided in the side wall of the lower housing 2 corresponding to the heat dissipation cavity 16, facilitating the circulation of air inside and outside the lower housing 2 and playing a role in internal and external heat dissipation. Moreover, a flow disturbing mechanism for accelerating gas circulation is also provided in the heat dissipation cavity 16. The flow disturbing mechanism cooperates with the convection holes 17, enabling the air flow inside the lower housing 2 to quickly convect with the external air, thereby accelerating the internal cooling of the lower housing 2, further accelerating the reset of the thermal state of the probe, and achieving repeated measurements in a shorter time.

[0033] Preferably, the flow disturbing mechanism includes a first motor 18, a reciprocating lead screw 19, and flow disturbing vanes 20. Among them, the first motor 18 is installed at the bottom of the inner wall of the heat dissipation cavity 16, the reciprocating lead screw 19 is connected to the output end of the first motor 18, and the reciprocating lead screw 19 is rotatably installed on a bearing seat in the heat dissipation cavity 16 to improve its rotational stability. The flow disturbing vanes 20 are threadedly connected to the reciprocating lead screw 19, and the upper and lower ends of the flow disturbing vanes 20 are in contact with the bottom surface of the inner wall of the heat dissipation cavity 16 and the bottom surface of the heat dissipation armor 12, playing a guiding role for the left and right movement of the flow disturbing vanes 20.

[0034] In the flow disturbing mechanism of this embodiment, the first motor 18 drives the reciprocating lead screw 19 to rotate, and then drives the flow disturbing vanes 20 to reciprocate left and right in the heat dissipation cavity 16, thereby achieving the purpose of disturbing the gas in the heat dissipation cavity 16 and accelerating the rapid internal cooling of the lower housing 2. In other embodiments, the flow disturbing mechanism can also be a mechanism such as a fan blowing directly or a cylinder pushing the flow disturbing vanes to reciprocate. Obviously, using a motor lead screw drive mechanism to drive the flow disturbing vanes to achieve flow disturbance has relatively small vibration and noise, which is more in line with the actual application of the measurement probe.

[0035] Preferably, the driving mechanism 8 includes a second motor 81, a lead screw 82, and a slider 83. Among them, the second motor 81 is installed in the lower housing 2, the lead screw 82 is connected to the output end of the second motor 81, and the other end of the lead screw 82 is rotatably installed on a bracket in the lower housing 2 to make the rotation of the lead screw 82 more stable. The slider 83 is threadedly connected to the lead screw 82, and the slider 83 is connected to the lower part of the metal probe 3. The sliding plug-in structure of the metal probe 3 and the lower housing 2 plays a guiding role for the slider 83 to prevent the slider 83 from rotating, thereby ensuring that the metal probe 3 can slide up and down. The second motor 81 is electrically connected to the main control circuit board 9.

[0036] In the driving mechanism of this embodiment, the second motor 81 drives the lead screw 82 to rotate, thereby driving the slider 83 to move up and down, so as to drive the metal probe 3 to move up and down. In other embodiments, the driving mechanism can also be a wedge mechanism, a cylinder or other mechanisms that drive the metal probe to move up and down. Obviously, using the motor lead screw transmission mechanism to drive the metal probe 3 to move up and down has higher movement accuracy, and can achieve micron-level precision compensation of the metal probe, thereby eliminating the measurement errors caused by different pressures on the fingers when different people measure or when the same measurer measures multiple times, and ensuring the consistency of accurate collection of physiological data each time.

[0037] Preferably, an upper silicone pad 21 is provided in the upper housing 1, and a lower silicone pad 22 is provided in the lower housing 2. The finger receiving cavity 5 is located between the upper silicone pad 21 and the lower silicone pad 22, and the metal probe 3 penetrates through the lower silicone pad 22. The two open sides of the special-shaped connecting spring 4 are respectively clamped between the upper silicone pad 21 and the upper housing 1, and between the lower silicone pad 22 and the lower housing 2. Using the silicone pad to contact the finger provides a better sense of comfort.

[0038] Preferably, a middle housing 23 covering the main control circuit board 9 is further provided at the top of the lower housing 2. The lower part of the middle housing 23 is clamped in the lower housing 2. The middle housing 23 is of a detachable structure, which is convenient for the disassembly, installation and maintenance of the main control circuit board 9.

[0039] The above are only the preferred embodiments of the present invention. It should be pointed out that for those skilled in the art, without departing from the structure of the present invention, several deformations and improvements can be made, and these will not affect the implementation effect of the present invention and the practicality of the patent.

Claims

1. A closed-loop measurement probe for physiological indicators, comprising an upper housing (1), a lower housing (2) and a metal probe (3). A finger receiving cavity (5) is formed between the upper housing (1) and the lower housing (2), and is characterized in that, The upper housing (1) and the lower housing (2) are connected by a special-shaped connecting spring (4). A pressure measuring component (6) for measuring the pressure exerted on the finger is provided in the finger receiving cavity (5). The metal probe (3) is slidably inserted into the lower housing (2) in an up-and-down manner, and a position detecting component (7) for obtaining the finger position information is further provided on the metal probe (3). A driving mechanism (8) for driving the metal probe (3) to move is provided in the lower housing (2). A main control circuit board (9) is also provided in the lower housing (2). The pressure measuring component (6), the position detecting component (7), and the driving mechanism (8) are respectively electrically connected to the main control circuit board (9). An adjusting mechanism for adjusting the volume of the finger receiving cavity (5) is further provided between the upper housing (1) and the lower housing (2). The adjusting mechanism is located between the upper housing (1) and the lower housing (2) at the opening end far from the special-shaped connecting spring (4). It includes a special-shaped hole (10) and a movable shaft (11). The special-shaped hole (10) is a through hole with a small upper end and a large lower end. The special-shaped hole (10) is opened on both sides of the lower housing (2). The movable shaft (11) is fixed on both sides of the upper housing (1). The movable shaft (11) is inserted into the special-shaped hole (10). The diameter of the movable shaft (11) is smaller than the minimum diameter of the upper end of the special-shaped hole (10), and the movable shaft (11) is in clearance fit with the special-shaped hole (10), so that the movable shaft (11) can move up and down and can be finely adjusted left and right, thereby realizing the adjustment of the distance between the upper housing (1) and the lower housing (2) up and down and the buffering in the left and right directions.

2. The physiological indication closed-loop measurement probe according to claim 1, characterized in that, A heat dissipation armor (12) is provided in the lower housing (2). The heat dissipation armor (12) is connected to the main control circuit board (9). Heat dissipation fins (13) are provided on the heat dissipation armor (12).

3. The physiological indication closed-loop measurement probe according to claim 2, wherein, A silicone grease pad (14) is provided on the heat dissipation armor (12). The metal probe (3) movably penetrates through the heat dissipation armor (12), and a heat dissipation fin (15) is provided at a position on the metal probe (3) corresponding to the silicone grease pad (14).

4. The physiological indication closed-loop measurement probe according to claim 2, wherein A heat dissipation cavity (16) is provided in the lower housing (2) below the heat dissipation armor (12). Convection holes (17) are provided on the side wall of the lower housing (2) corresponding to the heat dissipation cavity (16).

5. The physiological parameter closed-loop measurement probe according to claim 4, characterized in that, A flow disturbing mechanism for accelerating the gas flow is further provided in the heat dissipation cavity (16).

6. The closed-loop measurement probe for physiological indicators according to claim 5, characterized in that The flow disturbing mechanism includes a first motor (18), a reciprocating lead screw (19), and a flow disturbing fin (20). The first motor (18) is installed at the bottom of the inner wall of the heat dissipation cavity (16). The reciprocating lead screw (19) is connected to the output end of the first motor (18). The flow disturbing fin (20) is threadedly connected to the reciprocating lead screw (19), and the upper and lower ends of the flow disturbing fin (20) are in contact with the bottom surface of the inner wall of the heat dissipation cavity (16) and the bottom surface of the heat dissipation armor (12).

7. The physiological indication closed-loop measurement probe according to claim 1, wherein The described driving mechanism (8) includes a second motor (81), a lead screw (82), and a slider (83). The second motor (81) is installed in the lower housing (2). The lead screw (82) is connected to the output end of the second motor (81). The slider (83) is threadedly connected to the lead screw (82), and the slider (83) is connected to the lower part of the metal probe (3). The second motor (81) is electrically connected to the main control circuit board (9).

8. A closed-loop measurement probe for physiological indicators according to any one of claims 1-7, characterized in that The described pressure measurement component (6) includes a pressure sensor. The pressure sensor is installed in the upper housing (1) at the top of the inner wall of the finger receiving cavity (5), and the pressure sensor is electrically connected to the main control circuit board (9).

9. The physiological parameter closed-loop measurement probe according to claim 8, wherein, The described position detection component (7) includes a TOF sensor. The TOF sensor is installed on one side of the metal probe (3), and the TOF sensor is electrically connected to the main control circuit board (9).

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