Pressure detection system and correction method and detection method thereof

Abstract

This invention provides a pressure detection system and its calibration method. The pressure detection system includes at least one sensor and a calibration platform. The sensor is adapted to provide multiple pressing strokes. The calibration method of the pressure detection system utilizes a platform calibration curve generated by the platform calibration stroke to trace a balance calibration curve generated by the balance calibration stroke. A detection method for the pressure detection system is also proposed.

Description

[0001] Cross-references to related applications

[0002] This invention claims priority to Taiwan Patent Application No. 1121063479, filed on February 21, 2023, which is incorporated herein by reference for all purposes, as if fully set forth herein. Technical Field

[0003] This invention relates to a pressure detection system and its calibration and detection methods. Background Technology

[0004] In today's society, with increasing personal pressure and a growing awareness of health, measuring instruments that collect physiological health information, such as blood pressure monitors and pulse oximeters, have become frequently used products. However, these products may experience a gradual decrease in accuracy after leaving the factory. Therefore, developing a method that allows users to self-calibrate these devices has become an important issue. Summary of the Invention

[0005] The main objective of this invention is to provide a pressure detection system and its calibration and detection methods, which allows for the traceability of the balance calibration results before leaving the factory, thus solving the problem of the decrease in accuracy of pressure detection systems (such as blood pressure monitors or pulse oximeters) over time.

[0006] According to an embodiment of the present invention, a calibration method for a pressure detection system is provided for calibrating the pressure detection system, the pressure detection system including at least one sensor adapted to provide multiple pressing strokes, the calibration method comprising the following steps: using the sensor to perform multiple pressing strokes during a balance calibration stroke to press the balance and obtain multiple first balance display values ​​displayed by the balance; performing regression analysis on the multiple first digit values ​​displayed by the pressure detection system and the multiple first balance display values ​​during the balance calibration stroke to generate a balance calibration curve; using the sensor to perform multiple platform pressing strokes during a platform calibration stroke to press and calibrate the platform, obtaining multiple second digit values ​​displayed by the pressure detection system; determining multiple platform calibration corresponding values ​​based on the balance calibration curve and corresponding to the multiple second digit values; and repeatedly performing multiple platform pressing strokes to press and calibrate the platform, obtaining multiple third digit values ​​displayed by the pressure detection system, and generating a platform calibration curve based on the multiple third digit values ​​and the multiple platform calibration corresponding values.

[0007] According to an embodiment of the present invention, a detection method for a pressure detection system is provided, comprising: using at least one sensor of the pressure detection system to perform multiple pressing strokes during the detection stroke to press a target body, thereby obtaining at least one detection digital value displayed by the pressure detection system; and determining a detection value corresponding to the detection digital value based on the platform calibration curve of the pressure detection system.

[0008] According to one embodiment of the present invention, a pressure detection system is provided, including a base, a sensing device, and a calibration platform. The sensing device is disposed above the base and includes at least one sensor. The calibration platform is adapted to be disposed on the base during a platform calibration stroke, and the sensor is adapted to provide multiple pressing strokes and press against the calibration platform to perform calibration of the pressure detection system.

[0009] Based on the above, the pressure detection system and its calibration and detection methods provided in this embodiment of the invention utilize the platform calibration curve to trace the balance calibration curve. Users can also use the calibration platform to calibrate themselves after leaving the factory, thus solving the problem of the accuracy of pressure detection systems (blood pressure monitors or pulse diagnostic instruments, etc.) decreasing over time.

[0010] To make the above features and advantages of the present invention more apparent and understandable, specific embodiments are described below in conjunction with the accompanying drawings. Attached Figure Description

[0011] Figure 1 This is a schematic diagram of a pressure detection system according to an embodiment of the present invention;

[0012] Figures 2-3 This is a schematic diagram of a calibration method for a pressure detection system according to an embodiment of the present invention;

[0013] Figure 4A This is a curve showing the correspondence between the first digit value and the first scale display value according to an embodiment of the present invention;

[0014] Figure 4B This is a partial enlarged view of the balance calibration curve according to an embodiment of the present invention;

[0015] Figures 5-6 This is a schematic diagram of a calibration method for a pressure detection system according to an embodiment of the present invention;

[0016] Figure 7 This is a schematic diagram of a detection method for a pressure detection system according to an embodiment of the present invention;

[0017] In the attached figures, the following labels are used:

[0018] 1: Main Body

[0019] 10: Sensing device

[0020] 20: Calibration Platform

[0021] 21, 22: Opposing part

[0022] 23: Elastic part

[0023] 30: Base

[0024] 31, 32: Positioning section

[0025] 40: Storage Department

[0026] 100: Pressure Detection System

[0027] 101: Sensor

[0028] 200: Calibration method for pressure detection system

[0029] 201: Libra Calibration Schedule

[0030] 202: Platform Calibration Schedule

[0031] 203: Verify itinerary

[0032] 301~304, 401~405, 501~503, 601~602: Step 600: Testing method for pressure detection system

[0033] D1 i First digit value

[0034] D2 i Second digit value

[0035] D3 i Third digit value

[0036] D4 i Fourth digit value

[0037] L1, L2, L3, L4, L5: Balance calibration curves

[0038] M i :Detection of digital values

[0039] P i Platform calibration corresponding value

[0040] S1 i First scale display value

[0041] S2 i The second day's scale reading

[0042] T i Value to be verified. Detailed Implementation

[0043] The present invention will be further described below with reference to the figures and embodiments, so that those skilled in the art can better understand the present invention and implement it accordingly, but the embodiments are not intended to limit the present invention.

[0044] Reference Figure 1The diagram illustrates a pressure detection system according to an embodiment of the present invention. The pressure detection system 100 includes a main body 1, a sensing device 10, a calibration platform 20, and a base 30. In embodiments of the invention, the sensing device 10 disposed above the base 30 may include a single sensor 101 or multiple sensors 101, which may be arranged in an array. The pressure detection system 100 may be, for example, a blood pressure monitor, using the sensors 101 to press on the user's wrist and sense blood pressure.

[0045] The calibration platform 20 is used for the platform calibration stroke described below, and includes an elastic portion 23 for being pressed by each sensor 101 of the sensing device 10 during the platform calibration stroke, wherein the hardness of the elastic portion 23 is preferably less than 100HA.

[0046] The base 30 has positioning portions 31 and 32, and the calibration platform 20 includes alignment portions 21 and 22. Specifically, the positioning portions 31 and 32 may be, for example, grooves, but are not limited thereto. The dimensions of the positioning portions 31 and 32 are adapted to the dimensions of the alignment portions 21 and 22, so that the alignment portions 21 and 22 can be tightly engaged and abutted within the positioning portions 31 and 32, respectively, so that the calibration platform 20 will not translate or rotate relative to the base 30. In other words, by engaging the positioning portions 31 and 32 and the alignment portions 21 and 22, the position and orientation of the calibration platform 20 on the base 30 are fixed.

[0047] With the above-described snap-fit ​​configuration, during the platform calibration stroke described below, when any sensor 101 of the sensing device 10 presses against the calibration platform 20, the sensor 101, which is located at a fixed position in the sensing device 10, can press the same position of the elastic part 23 each time the platform calibration stroke is executed, thus avoiding errors caused by pressing different positions of the elastic part 23 and affecting the accuracy of the platform calibration stroke.

[0048] The main body 1 of the pressure detection system 100 may have a storage section 40 to store the calibration platform 20.

[0049] Reference Figure 2 According to an embodiment of the present invention, a calibration method 200 for a pressure detection system 100 is provided. The calibration method 200 includes a balance calibration stroke 201, a platform calibration stroke 202, and a verification stroke 203.

[0050] Please refer to the following at the same time Figure 1 and Figure 3In the balance calibration stroke 201 of this embodiment, the balance (not shown) is placed on the base 30 of the pressure detection system 100, and the sensor 101 presses the balance with different pressures through multiple pressing strokes. Corresponding to the different pressures applied by the sensor 101, multiple first balance display values ​​S1 are obtained and displayed on the balance. i Where i = 1, 2, 3…N, the first scale display values ​​S11, S12, S13… represent the weight or pressure (weight divided by unit area) displayed by the scale when the sensor 101 applies different pressures, and are referred to below in terms of pressure (mmHg) (step 301). It should be noted that the multiple first scale display values ​​S1… i This corresponds to the pressing of a single sensor 101. When the sensing device 10 has multiple sensors 101, each sensor 101 corresponds to multiple display values ​​S1 of the first scale. i .

[0051] It should be noted that during the aforementioned multiple pressing strokes, the sensing device 10 of the pressure detection system will also display multiple first digital values ​​D1 according to the different pressures applied by the sensor 101. i The greater the pressure applied by sensor 101, the higher the displayed first digital value D1. i The larger the value, the higher the corresponding value S1 displayed on the first scale. i It is also larger. That is to say, the first digit value D1 i Compared with the first scale display value S1 i Correspondingly, and positively correlated. It should be noted that the above multiple first-digit values ​​D1... i This corresponds to the pressing of a single sensor 101. When the sensing device 10 has multiple sensors 101, each sensor 101 corresponds to a set of multiple first digital values ​​D1. i .

[0052] The balance calibration stroke 201 also includes multiple first digital values ​​D1 displayed by the sensing device 10. i And multiple first scale display values ​​S1 i A regression analysis is performed, where the first digit is the independent variable and the first scale display value is the strain number (step 302). After the regression analysis above, the balance calibration curve is generated (step 303).

[0053] It should be noted that in the above-mentioned multiple pressing strokes, the pressure applied by the sensor 101 should at least cover the range of 0 to 200 mmHg. In some embodiments, the regression analysis in step 302 is a nonlinear regression analysis, and the balance calibration curve is a nonlinear curve, but the present invention is not limited thereto.

[0054] In some embodiments, the regression analysis in step 302 is performed on multiple first balance readings S1 that fall within the range of 0–200 mmHg. i and the corresponding multiple first digit values ​​D1 i Perform regression analysis. In some embodiments, the regression analysis in step 302 is performed on a plurality of first digit values ​​D1. i And multiple first scale display values ​​S1 i Regression analysis should be performed on at least three of the factors, but not limited to this.

[0055] Furthermore, since the zero point of the balance correction curve generated after regression analysis may be too high, in some preferred embodiments, a method to increase the weight of the zero point is added to the regression analysis in step 302 (step 304). For details, please refer to an embodiment of the present invention. Figure 4A , Figure 4B The explanation in Table 1 is as follows.

[0056] Table 1:

[0057]

[0058] In Table 1, the first group represents a plurality of first scale display values ​​S1 according to an embodiment of the present invention. i and multiple first digit values ​​D1 i The raw data includes 6 sets of corresponding first scale display values ​​S1 i and the first digit value D1 i And draw as shown Figure 4A As shown, the pressure zero point value (S1) of the original data is used. i =0.0 mmHg) and the corresponding first digit value D1 i (36210) is the first group.

[0059] When a nonlinear regression analysis of a cubic equation is performed on the above 6 sets of data (or three of the 6 sets of data), a cubic equation is obtained, which is the balance correction curve. The coefficients of the cubic term *a*, quadratic term *b*, linear term *c*, and zeroth-order term *d* of the cubic equation are shown in Table 1. However, the balance correction curve generated by the above nonlinear regression analysis has a pressure value of 7.13 mmHg at a place value of 36210 (e.g., ...). Figure 4B The balance calibration curve L1 in the figure is shown, and the pressure zero point value of the original data (S1) is compared with that of the original data. i The value is far from 0.0 mmHg, which causes the zero point to be too high.

[0060] To address the aforementioned issue of excessively high zero-point pressure, this invention proposes adding one or more sets of zero-point pressure values ​​to increase the zero-point weight. Specifically, when one set of zero-point pressure values ​​is added (as shown in the second set in Table 1), and a nonlinear regression analysis using a cubic equation is performed, a balance correction curve L2 is obtained. The pressure value corresponding to the digit 36210 is 3.83 mmHg, which is closer to 0.0 mmHg than the result obtained in the first set. When two sets of zero-point pressure values ​​are added (as shown in the third set in Table 1), and a nonlinear regression analysis using a cubic equation is performed, a balance correction curve L3 is obtained. The pressure value corresponding to the digit 36210 is 2.62 mmHg, which is even closer to 0.0 mmHg than the result obtained in the second set. When three sets of zero-point pressure values ​​are added (as shown in the fourth set in Table 1), and a nonlinear regression analysis using a cubic equation is performed, a balance correction curve L4 is obtained. The pressure value corresponding to the digit 36210 is 1.99 mmHg, which is even closer to 0.0 mmHg than the result obtained in the third set. When four sets of zero pressure values ​​are added (as shown in the fifth set in Table 1), and the nonlinear regression analysis of the cubic equation is performed in the same way, the balance correction curve L5 is obtained. The pressure value corresponding to the digit value 36210 is 1.60 mmHg, which is closer to 0.0 mmHg than the result obtained in the fourth set.

[0061] In some preferred embodiments, the zero-point weighting method in step 304 adds three sets of pressure zero-point values, with the balance calibration curve L4 as the result of step 303, but is not limited thereto.

[0062] Please refer to the following at the same time. Figure 1 and Figure 5 In the platform calibration stroke 202, the alignment parts 21 and 22 of the calibration platform 20 are engaged with the positioning parts 31 and 32 of the base 30, and the elastic part 23 of the calibration platform 20 is pressed with different pressures by the sensor 101 to perform multiple platform pressing strokes, thereby obtaining multiple second digital values ​​D2 displayed by the sensing device 10. i (Step 401), and according to Figure 3 The balance correction curve obtained in step 303 (e.g., Figure 4B The balance correction curve L4 shown is determined by these second digit values ​​D2. i Corresponding values ​​P for multiple platform calibrations i (Step 402). Then, the platform pressing stroke in step 401 is repeated to press and correct the platform 20, obtaining multiple third digital values ​​D3 displayed by the sensing device 10. i (Step 403).

[0063] Since step 403 performs the same platform pressing stroke as step 401, multiple third digit values ​​D3 iThis can be viewed as corresponding to the calibration value P of multiple platforms. i Correspondingly, therefore, in step 404, for the multiple third-digit values ​​D3 output by sensor 101... i And the corresponding values ​​P for multiple platform calibrations i Regression analysis is performed (step 404) to generate a platform correction curve (step 405). In some embodiments, the above applies to multiple third digit values ​​D3. i and the corresponding value P for multiple platform calibrations i The regression analysis performed was a nonlinear regression analysis, and the platform correction curve was a nonlinear curve, but this invention is not limited thereto.

[0064] It should be noted that there are multiple second-digit values ​​D2 i Corresponding value P for calibration across multiple platforms i The actual correspondence between them is determined by the Libra correction curve, that is, multiple second digit values ​​D2 i Corresponding values ​​P for multiple platform calibrations i This essentially conforms to the nonlinear equation of the balance correction curve. Furthermore, since step 403 performs the same platform pressing stroke as step 401 (a fixed platform pressing stroke can be set, for example, by a controller within the pressure detection system 100), multiple third-digit values ​​D3... i It can be viewed as having multiple second-digit values ​​D2 i The same or similar. Therefore, when multiple third-digit values ​​D3 are output by sensor 101 in step 404. i And the corresponding values ​​P for multiple platform calibrations i Regression analysis is performed, and a platform calibration curve is generated in step 405, which makes the platform calibration curve almost identical to the balance calibration curve. In other words, the calibration method of the pressure detection system provided in this embodiment of the invention can trace the calibration result of the balance using the platform calibration stroke, that is, trace the balance calibration curve through the platform calibration curve.

[0065] It should be particularly noted that, since the pressure detection system 100 of this embodiment is equipped with a fixed calibration platform 20, the balance calibration curve can be traced using the platform calibration curve by performing the aforementioned balance calibration stroke 201 and platform calibration stroke 202 before leaving the factory. Users can also perform the platform calibration stroke 202 using the calibration platform 20 after leaving the factory to self-calibrate the pressure detection system 100, thereby preventing the accuracy of the pressure detection system 100 from decreasing over time.

[0066] Referring to Table 2 below, it lists the values ​​for the range of maximum difference between the platform calibration curve and the balance calibration curve according to an embodiment of the present invention. It can be seen that the error at the range of maximum difference is less than 7.84 mmHg. That is to say, the calibration method of the pressure detection system provided in this embodiment of the present invention can use the platform calibration stroke to trace the balance calibration result.

[0067] Table 2:

[0068] Example 1 Example 2 Example 3 Difference (mmHg) -6.18 7.84 -5.55 Platform calibration curve values ​​(mmHg) 324.97 164.97 0 Balance calibration curve values ​​(mmHg) 331.16 157.13 5.55

[0069] Please refer to the following at the same time. Figure 1 and Figure 6 As mentioned above, the calibration method of the pressure detection system provided in this embodiment of the invention can utilize the calibration result of the platform calibration stroke traceability balance. Therefore, the calibration method 200 of the pressure detection system can provide a verification stroke 203 based on this traceability characteristic.

[0070] In verification step 203, the balance scale from step 301 is placed back on the base 30 of the pressure detection system 100, and multiple pressing strokes are performed by pressing the balance scale with different pressures using the sensor 101. For each different pressure applied by the sensor 101, multiple second balance scale display values ​​S2 are obtained. i and multiple fourth digital values ​​D4 displayed by the sensing device 10 i (Step 501). Based on the platform correction curve generated in step 405, determine the multiple fourth digit values ​​D4. i The corresponding multiple values ​​T to be verified i (Step 502). Furthermore, based on the multiple second scale display values ​​S2... i And multiple values ​​T to be verified i The reliability of the platform correction curve generated in step 405 is determined by the differences between each value (step 503). If each difference falls within the acceptable range, it means that the reliability of the platform correction curve generated in step 405 is high.

[0071] Please refer to the following. Figure 7 Since the calibration method of the pressure detection system provided in this embodiment of the invention can utilize the platform calibration stroke to trace the calibration result of the balance, and taking advantage of this traceability feature, this embodiment of the invention further provides a detection method 600 for the pressure detection system.

[0072] The detection method 600 of the pressure detection system includes using the sensor 101 of the pressure detection system 100 to perform multiple pressing strokes to press the target body to be measured, and obtaining multiple detection digital values ​​M displayed by the sensing device 10. i (Step 601). Specifically, when the pressure detection system 100 is a blood pressure monitor, the target body is, for example, the user's wrist.

[0073] The detection method 600 for the pressure detection system further includes determining, based on the plateau calibration curve generated in step 405, multiple detection bit values ​​M. i The corresponding detection value (mmHg). The true pressure value of the target body is obtained by tracing the balance calibration curve through the platform calibration curve (step 602).

[0074] In summary, the pressure detection system and its calibration and detection methods provided in this embodiment of the invention utilize the platform calibration curve to trace the balance calibration curve. Users can also perform self-calibration using the calibration platform after the product leaves the factory, thus solving the problem of the accuracy of pressure detection systems (blood pressure monitors or pulse diagnostic instruments, etc.) decreasing over time.

[0075] The above description is merely a preferred embodiment of the present invention and is not intended to limit the patent scope of the present invention. Therefore, all equivalent variations made using the content of the present invention are similarly included within the scope of the present invention and are hereby declared.

Claims

1. A calibration method for a pressure detection system, characterized in that, A method for calibrating a pressure detection system, the pressure detection system including at least one sensor adapted to provide multiple pressing strokes, the calibration method of the pressure detection system including the following steps: The plurality of pressing strokes are performed during the balance calibration stroke using the at least one sensor to press the balance and obtain a plurality of first balance display values ​​displayed by the balance. Regression analysis is performed on multiple first digital values ​​displayed by the pressure detection system and multiple first scale display values ​​during the balance calibration stroke to generate a balance calibration curve; Multiple platform pressing strokes are performed during the platform calibration stroke using the at least one sensor to press and calibrate the platform, thereby obtaining multiple second digital values ​​displayed by the pressure detection system; Based on the aforementioned balance calibration curve, determine the multiple platform calibration corresponding values ​​corresponding to the multiple second digit values; as well as Repeatedly execute the multiple platform pressing strokes to press the calibration platform, obtain multiple third-digit values ​​displayed by the pressure detection system, and generate a platform calibration curve based on the multiple third-digit values ​​and the multiple platform calibration corresponding values.

2. The calibration method for the pressure detection system as described in claim 1, characterized in that, Also includes: The plurality of pressing strokes are performed during the verification stroke using the at least one sensor to press the balance, thereby obtaining a plurality of second balance display values ​​displayed by the balance and a plurality of fourth digital values ​​displayed by the pressure detection system; Based on the platform calibration curve, determine multiple values ​​to be verified corresponding to the multiple fourth digit values; as well as The reliability of the platform calibration curve is determined based on the difference between the multiple second scale display values ​​and the multiple values ​​to be verified.

3. The calibration method for the pressure detection system as described in claim 1, characterized in that, In the step of performing the regression analysis on the plurality of first digit values ​​displayed by the pressure detection system and the plurality of first digit values ​​displayed by the balance during the balance calibration stroke to generate the balance calibration curve, the regression analysis is a non-linear regression analysis, and the balance calibration curve is a non-linear curve.

4. The calibration method for the pressure detection system as described in claim 3, characterized in that, The regression analysis includes increasing the weight of the zero point.

5. The calibration method for the pressure detection system as described in claim 3, characterized in that, In the regression analysis, the regression analysis is performed on at least three of the plurality of first digit values ​​and the plurality of first scale display values.

6. The calibration method for the pressure detection system as described in claim 1, characterized in that, The step of generating the platform correction curve based on the plurality of third digit values ​​and the plurality of platform correction corresponding values ​​further includes: Regression analysis is performed on the plurality of third digit values ​​and the plurality of corresponding platform correction values ​​to generate the platform correction curve.

7. A detection method for a pressure detection system, characterized in that, include: Using at least one sensor of a pressure detection system, multiple pressing strokes are performed during the detection stroke to press the target body, and at least one detection digital value is obtained by the pressure detection system. as well as The detection value corresponding to the at least one detection digit value is determined based on the platform calibration curve of the pressure detection system. The platform calibration curve of the pressure detection system is generated using the calibration method described in claim 1.

8. A pressure detection system, characterized in that, include: Base; A sensing device is disposed above the base and includes at least one sensor; as well as Calibration platform The calibration platform is adapted to be configured on the base during a platform calibration stroke, and the at least one sensor is adapted to provide multiple pressing strokes and press the calibration platform to perform calibration of the pressure detection system; The pressure detection system is calibrated using the calibration method described in claim 1.

9. The pressure detection system as described in claim 8, characterized in that, The base has a positioning part, and the calibration platform includes an alignment part, which is used to abut against the positioning part.

10. The pressure detection system as described in claim 9, characterized in that, The number of positioning parts is multiple, the number of alignment parts is multiple, and the multiple positioning parts correspond to the multiple alignment parts respectively.

11. The pressure detection system as described in claim 9, characterized in that, The positioning part is engaged with the alignment part.

12. The pressure detection system as described in claim 8, characterized in that, It also includes a main body, which has a storage section for storing the calibration platform.

13. The pressure detection system as described in claim 8, characterized in that, The calibration platform includes an elastic portion for being pressed by the at least one sensor, and the hardness of the elastic portion is less than 100 HA.

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