Pressure acquisition unit for traditional Chinese medicine pulse diagnosis

Abstract

The utility model relates to a pressure acquisition unit for traditional Chinese medicine pulse diagnosis, which comprises a flexible base layer provided with a base body section and a flat cable interface part, cun pulse, Guan pulse and Chi pulse sensing areas are arranged on the base body section and connected with the conductive connecting part, and the free ends of the sensing areas are far away from the flat cable interface part. In addition, a reverse closing sensing connecting part extends from a branch of the Guan pulse sensing area, and a reverse closing sensing area is arranged at the tail part; a film piezoresistive sensor is adhered to the surface of each sensing area and is electrically connected with the flat cable interface part through conductive parts on the surfaces of the conductive connecting part and the reverse closing sensing connecting part, and the adjacent conductive parts are packaged by an insulating sealant. The unit is outstanding in technical effect, the flexible base layer is attached to the curved surface of the wrist, the wearing comfort and the attaching degree are improved, and it is guaranteed that pressure collection is accurate; a reverse-closing sensing area is additionally arranged, the limitation that a traditional device is difficult to measure reverse-closing pulses is broken through, and pulse condition information is comprehensively and accurately obtained. The thin-film piezoresistive sensor is high in sensitivity, and the conductive part is packaged and fixed, so that stable signal transmission is ensured, and the reliability of the whole pressure acquisition unit is enhanced.

Description

Technical Field

[0001] This utility model belongs to the field of traditional Chinese medicine pulse diagnosis instrument technology, and in particular relates to a pressure acquisition unit for traditional Chinese medicine pulse diagnosis. Background Technology

[0002] Traditional Chinese medicine (TCM) pulse diagnosis, as an important component of traditional medical diagnosis, assesses a person's health status through the precise acquisition of pulse signals, boasting a long history and profound theoretical foundation. Accurate acquisition of pulse signals is a crucial step in achieving precise diagnosis in TCM pulse diagnosis. For a long time, traditional pressure-sensing devices have played a vital role in TCM pulse diagnosis practice. However, most of these devices rely excessively on mechanical sensors, exhibiting numerous inherent defects that severely restrict the improvement of diagnostic accuracy and their widespread clinical application.

[0003] In the objective study of pulse diagnosis in Traditional Chinese Medicine, the biomechanical adaptability of pressure sensing devices directly affects the fidelity of pulse information. Traditional testing equipment mostly uses rigid substrates to support mechanical sensors, such as strain gauge arrays or piezoelectric ceramic arrays. Their inherent structural defects lead to the following three major clinical challenges:

[0004] Mechanical impedance mismatch: The elastic modulus of the sensor differs significantly from that of human tissue, by up to three orders of magnitude. When a rigid sensor is fitted against the curved surface of the wrist, stress concentration occurs, causing waveform distortion of the radial artery pulsation signal, resulting in a large deviation between the acquired pulse signal and the actual situation.

[0005] Motion artifact interference: Slight tremors during breathing or micro-displacements of the skin caused by body position adjustments, after being amplified by rigid structures, can create severe baseline drift noise. This noise typically reduces the signal-to-noise ratio of the pulse signal to below 40 dB, significantly interfering with the clear presentation of the pulse signal.

[0006] Physiological limitations: Rigid carriers cannot achieve independent deformation compensation for the three pulse positions (cun, guan, chi), and are difficult to accommodate the detection requirements of anatomical variations such as reverse guan pulse. In clinical practice, the false negative rate of reverse guan pulse is as high as 28%-35%, leading to the omission of many important diagnostic clues.

[0007] Traditional mechanical pulse oximetry devices are typically bulky and difficult to fit snugly against the complex curves of the wrist. This misfit can lead to uneven pressure distribution, causing the acquired pulse signals to fail to accurately reflect the patient's physiological condition and thus affecting the accuracy of diagnostic results.

[0008] The rigidity of mechanical components makes them extremely sensitive to even the slightest movements of a patient's limbs. During pulse diagnosis, these minute movements can be captured by the mechanical components and converted into noise signals, known as motion artifact noise. This severely interferes with the extraction and analysis of pulse signals, reducing the reliability of the diagnosis.

[0009] The use of rigid materials not only causes extreme discomfort for patients during prolonged wear, but also fails to meet the testing requirements of special physiological structures such as the reverse pulse. The reverse pulse has important reference value for the diagnosis of certain constitutions, but due to the structural limitations of traditional devices, it is often difficult to detect it effectively.

[0010] In recent years, with the development of materials science and sensor technology, flexible piezoresistive sensors have emerged, improving the fit problem of traditional mechanical sensors to some extent. However, existing flexible piezoresistive sensor technology still has many significant shortcomings:

[0011] The structural design lacks specificity.

[0012] Most thin-film sensors are uniformly laid on the surface of flexible substrates, lacking specific optimization for the "cun, guan, chi" three-jiao positioning in traditional Chinese medicine. In pulse diagnosis, the "cun, guan, chi" three-jiao positioning is an important basis for judging the functional state of different organs in the human body. The uniform laying method of existing sensors makes it easy for signals from different pulse positions to couple and interfere, making it difficult to accurately distinguish the characteristics of different pulse positions and affecting the accuracy of diagnosis.

[0013] Unable to effectively detect reverse pulse: As an important diagnostic basis for special constitutions, the reverse pulse is often missed during the detection process due to the lack of corresponding branch sensing structure in existing sensors, resulting in the inability to fully and accurately obtain the patient's pulse information.

[0014] The conductive components lack effective encapsulation protection: In existing technologies, conductive components are directly exposed on the substrate surface, lacking effective encapsulation protection. During actual use, factors such as sweat corrosion and mechanical friction can easily lead to performance degradation of the conductive components, affecting the stability and lifespan of the sensor.

[0015] In summary, existing TCM pulse diagnosis pressure acquisition devices have several unresolved issues regarding structural design, functional implementation, and performance stability, hindering the modernization of TCM pulse diagnosis. Therefore, a new technological solution is urgently needed to overcome these shortcomings and improve the diagnostic accuracy and clinical application value of TCM pulse diagnosis. Utility Model Content

[0016] In view of the problems existing in the prior art, this utility model provides a pressure acquisition unit for pulse diagnosis in traditional Chinese medicine.

[0017] This utility model is implemented as follows: a pressure acquisition unit for pulse diagnosis in traditional Chinese medicine, characterized in that: it includes a flexible base layer, the flexible base layer includes a base segment and a cable interface at one end thereon; the base segment is provided with a cun pulse sensing area, a guan pulse sensing area and a chi pulse sensing area corresponding to the cun pulse, guan pulse and chi pulse diagnostic positions on the human wrist; each sensing area is connected to a conductive connection part, and the end of each sensing area away from the cable interface is formed as a free end.

[0018] It also includes a reverse pulse sensing connection part with a branch extension corresponding to the pulse sensing area, and the end of the reverse pulse sensing connection part is provided with a reverse pulse sensing area; each sensing area is provided with a thin-film piezoresistive sensor for collecting pressure changes on the pulse position; the thin-film piezoresistive sensor is electrically connected to the ribbon cable interface part through the conductive connection part and the conductive parts on the surface of the reverse pulse sensing connection part, and adjacent conductive parts are sealed and fixed by insulating sealant.

[0019] Further preferably, an isolation groove is provided between adjacent sensing areas of the cun pulse sensing area, guan pulse sensing area and chi pulse sensing area, extending along the width direction of the flexible base layer; the isolation groove forms an open end on the side near the free end of the sensing area and a closed end on the side near the base segment, and releases the deformation stress of adjacent sensing areas through the open end.

[0020] More preferably, the width of the isolation groove is no more than 10 mm.

[0021] Further preferably, the root of the closed end is provided with a tear-resistant rounded corner.

[0022] More preferably, the reverse-pulse induction connection is provided with a through-type stress buffer groove. The stress buffer groove is arranged along the extension direction of the reverse-pulse induction connection and its groove outline has a streamlined structure with a gradually narrowing shape, which is used to reduce the deformation constraint of the flexible base layer when detecting the reverse pulse position of the radial artery at the wrist.

[0023] More preferably, the cun pulse sensing area, guan pulse sensing area and chi pulse sensing area have the same geometric shape and size parameters, and their outer contour is one of rectangle, ellipse or racetrack shape; wherein, the extension length of each sensing area along the length direction of the flexible base layer is 3-50mm, the expansion range along the width direction is 3-15mm, and the dimension in the length direction is 1.5-5 times the dimension in the width direction.

[0024] More preferably, the anti-guan pulse sensing area has a cun pulse sensing area with the same geometry as the guan pulse sensing area and the chi pulse sensing area, with an extension length of 3-15mm along the length direction of the flexible base layer and an expansion range of 3-50mm along the width direction.

[0025] More preferably, the sensing area of ​​the thin-film piezoresistive sensor is provided with a protective structure. The closed boundary formed by the protective structure along the contour of the sensing area is equidistant from the edge of the sensing area by 0.5-3.0 mm, forming a circumferentially continuous stress buffer zone.

[0026] More preferably, the anti-pulse sensing connection portion forms a gradual transition structure, wherein the expansion amplitude near the first end of the pulse sensing area is greater than the expansion amplitude connecting the second end of the anti-pulse sensing area, and the expansion amplitude ratio is 1.5:1 to 4:1.

[0027] More preferably, the extension range of the second end of the gradient transition structure is 5mm to 8mm.

[0028] The advantages and technical effects of this utility model are as follows: The pressure acquisition unit for TCM pulse diagnosis of this invention has shown significant technical effects in the field of TCM pulse diagnosis, which are specifically analyzed and summarized as follows:

[0029] I. The structural design aligns with the needs of traditional Chinese medicine pulse diagnosis, improving wearing comfort and signal acquisition accuracy.

[0030] This unit features a flexible base design that perfectly conforms to the curvature of the human wrist, improving wearing comfort and ensuring accurate pressure measurement. The clearly defined sensing zones for the cun, guan, and chi pulses on the base segment are highly targeted, effectively avoiding coupling interference between signals from different pulse positions, thus significantly improving the accuracy of pulse signal acquisition.

[0031] II. Innovative addition of a reverse-off induction connection and reverse-off induction zone fills a gap in traditional devices.

[0032] Traditional devices have significant limitations in detecting the reverse pulse, but this invention successfully solves this problem by adding a reverse pulse sensing connection and a reverse pulse sensing area. This innovative design enables the unit to acquire patient pulse information more comprehensively and accurately, providing crucial evidence for the diagnosis of special constitutions and further enriching the methods and accuracy of traditional Chinese medicine pulse diagnosis.

[0033] Third, a high-sensitivity thin-film piezoresistive sensor is used to ensure accurate signal acquisition.

[0034] Thin-film piezoresistive sensors are highly sensitive and can accurately acquire pressure changes at the pulse position. Electrical connection to the ribbon cable interface is achieved through conductive components on the surfaces of the conductive and reverse inductive connection parts, with adjacent conductive components encapsulated and fixed with insulating sealant. This design ensures stable signal transmission, improves sensor stability and lifespan, and thus enhances the reliability and practicality of the entire pressure acquisition unit.

[0035] IV. Multiple design optimizations further enhance technical performance.

[0036] Isolation slot design: An isolation slot is provided between adjacent sensing areas. The deformation stress is released through the open end, which avoids the interference of stress concentration on the signal acquisition of each sensing area, making the acquired pulse signal more realistic and reliable.

[0037] Tear-resistant rounded corner design: The root of the closed end of the isolation groove is equipped with a tear-resistant rounded corner to disperse stress concentration, reduce the risk of tearing, ensure the structural stability of the isolation groove, and continuously and effectively release deformation stress.

[0038] Through-type stress buffer groove design: A through-type stress buffer groove is provided on the reverse pulse induction connection part to reduce deformation constraint, absorb and disperse stress, avoid stress concentration affecting the acquisition of reverse pulse signal, and improve the success rate and accuracy of reverse pulse detection.

[0039] Uniform geometric shape and size parameter design: Each sensing area has the same geometric shape and size parameters, which facilitates standardized production and assembly, while ensuring that each sensing area can effectively collect pulse signals and reduce signal deviation.

[0040] Protective structure design: The sensing area of ​​the thin-film piezoresistive sensor is equipped with a protective structure, forming a circumferentially continuous stress buffer zone, which effectively disperses external stress, reduces the risk of sensor damage, and ensures the accuracy of signal acquisition.

[0041] Gradual transition structure design: The reverse pulse induction connection part forms a gradual transition structure, which effectively buffers and disperses stress, avoids stress concentration from damaging the connection part, and reduces signal transmission interference, ensuring accurate acquisition of reverse pulse signals.

[0042] In summary, the pressure acquisition unit for TCM pulse diagnosis of the present invention exhibits significant technical advantages in terms of structural design, functional implementation, signal acquisition and transmission, and sensor stability, providing more accurate, reliable, and practical support for TCM pulse diagnosis. Attached Figure Description

[0043] Figure 1 This is a schematic diagram of the structure of an embodiment of the present utility model.

[0044] In the diagram: 1. Flexible base layer; 11. Substrate section; 12. Cable interface section; 13. Cun pulse sensing area; 14. Guan pulse sensing area; 15. Chi pulse sensing area; 16. Conductive connection section; 17. Reverse Guan pulse sensing connection section; 171. Through-type stress buffer groove; 18. Reverse Guan pulse sensing area; 19. Isolation groove; 2. Thin-film piezoresistive sensor; 21. Conductive component; 22. Stress buffer strip. Detailed Implementation

[0045] To make the objectives, technical solutions, and advantages of this utility model clearer, the following detailed description is provided in conjunction with embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the scope of this utility model.

[0046] Please see Figure 1 A pressure acquisition unit for pulse diagnosis in traditional Chinese medicine includes a flexible base layer, which includes a base segment 11 and a cable interface 12 located at one end thereon; the base segment is provided with a cun pulse sensing area 13, a guan pulse sensing area 14, and a chi pulse sensing area 15 corresponding to the cun pulse, guan pulse, and chi pulse diagnostic positions on the human wrist; each sensing area is connected to a conductive connection part 16, and the end of each sensing area away from the cable interface is formed as a free end;

[0047] It also includes a reverse pulse sensing connection part 17 with a branch extension corresponding to the pulse sensing area, and a reverse pulse sensing area 18 is provided at the end of the reverse pulse sensing connection part; a thin film piezoresistive sensor 2 for collecting pressure changes on the pulse position is attached to the surface of each sensing area; the thin film piezoresistive sensor is electrically connected to the ribbon cable interface part through the conductive connection part and the conductive component 21 on the surface of the reverse pulse sensing connection part, and adjacent conductive components are sealed and fixed by insulating sealant.

[0048] This utility model's pressure acquisition unit for TCM pulse diagnosis has significant technical advantages: First, its structural design closely matches the needs of TCM pulse diagnosis. The flexible base layer better adapts to the curvature of the human wrist, improving wearing comfort and fit, and ensuring the accuracy of pressure acquisition. The base segment clearly delineates the sensing areas for the cun, guan, and chi pulses, providing strong targeting and effectively avoiding coupling interference between signals from different pulse positions, thus improving the accuracy of pulse signal acquisition. Second, the addition of a reverse guan pulse sensing connection and area solves the problem of traditional devices' difficulty in detecting the reverse guan pulse, enabling more comprehensive and accurate acquisition of the patient's pulse information, providing crucial evidence for the diagnosis of special constitutions.

[0049] Furthermore, a thin-film piezoresistive sensor is employed, which boasts high sensitivity and can accurately acquire pulse pressure changes. Electrical connection to the ribbon cable interface is achieved through conductive components on the surfaces of the conductive and reverse induction connection parts, with adjacent conductive components encapsulated and fixed using insulating sealant. This ensures stable signal transmission, improves sensor stability and lifespan, and enhances the reliability and practicality of the entire pressure acquisition unit.

[0050] In a further preferred embodiment, an isolation groove 19 is provided between adjacent sensing areas of the cun pulse sensing area 13, guan pulse sensing area 14, and chi pulse sensing area 15, extending along the width direction of the flexible base layer. The isolation groove forms an open end on the side near the free end of the sensing area and a closed end on the side near the base segment, releasing the deformation stress between adjacent sensing areas through the open end. When pressure is applied to the wrist, the deformation stress generated between adjacent sensing areas can be effectively released through the open end. This avoids interference from stress concentration on signal acquisition in each sensing area, allowing each sensing area to respond more independently and accurately to changes in pulse pressure. As a result, the acquired pulse signals are more realistic and reliable, greatly improving the accuracy of TCM pulse diagnosis, providing doctors with more precise diagnostic evidence, and helping to enhance the clinical application value of TCM pulse diagnosis.

[0051] Further preferably, the width of the isolation groove is no more than 10mm, and in this embodiment, 3.5mm is preferred. This width design can effectively release the deformation stress of adjacent sensing zones and avoid signal interference, while avoiding affecting the overall structural stability of the flexible base layer due to excessive width, which helps each sensing zone to accurately collect pulse signals.

[0052] Further preferably, the root of the closed end is provided with a tear-resistant rounded corner. This rounded corner design can disperse stress concentration and reduce the risk of tearing of the closed end of the isolation groove due to deformation or external pulling force. This ensures the structural stability of the isolation groove and continuously and effectively releases deformation stress.

[0053] Preferably, the reverse pulse sensing connection portion is provided with a through-type stress buffer groove 171. The stress buffer groove is arranged along the extension direction of the reverse pulse sensing connection portion, and its groove outline has a streamlined structure with a gradually narrowing shape, which is used to reduce the deformation constraint of the flexible substrate during the detection of the radial artery reverse pulse position at the wrist. When the wrist undergoes micro-movement or deformation due to special physiological structures, the buffer groove can absorb and disperse stress, avoiding stress concentration from affecting the acquisition of the reverse pulse signal. This allows the reverse pulse sensing area to capture reverse pulse information more sensitively and accurately, improving the success rate and accuracy of reverse pulse detection.

[0054] Further preferably, the cun pulse sensing area, guan pulse sensing area, and chi pulse sensing area have the same geometric shape and size parameters, and their outer contour is one of rectangle, ellipse, or racetrack shape; wherein, the extension length of each sensing area along the length direction of the flexible base layer is 3-15mm, preferably 14.5mm in this embodiment, and the extension range along the width direction is 3-15mm, preferably 7mm in this embodiment, and the length dimension is 1.5-5 times the width dimension.

[0055] This design ensures uniform specifications for all sensing zones, facilitating standardized production and assembly. Simultaneously, the optimized sizing better conforms to the wrist pulse position, guaranteeing that each sensing zone effectively acquires pulse signals, reducing signal deviations caused by improper sizing, and improving the accuracy and reliability of pulse pressure acquisition in traditional Chinese medicine pulse diagnosis.

[0056] Further preferably, the reverse pulse sensing area has a cun pulse sensing area with the same geometric shape as the guan pulse sensing area and the chi pulse sensing area. Its extension length along the flexible base layer is 3-15mm, preferably 7mm in this embodiment; its width extension is 3-50mm, preferably 18mm in this embodiment. This uniform geometry ensures that the reverse pulse sensing area maintains consistent mechanical properties with other sensing areas when in contact with the wrist, effectively avoiding signal acquisition errors caused by shape differences. Simultaneously, the reasonable size range allows it to accurately adapt to the reverse pulse position, improving the ability to capture reverse pulse signals, providing more comprehensive and accurate diagnostic information for traditional Chinese medicine pulse diagnosis, and enhancing the reliability of the diagnosis.

[0057] Further preferably, the sensing area of ​​the thin-film piezoresistive sensor is provided with a protective structure. The closed boundary formed by the protective structure along the contour of the sensing area is equidistant from the edge of the sensing area by 0.5-3.0 mm, preferably 1 mm in this embodiment, forming a circumferentially continuous stress buffer zone 22. This effectively disperses the stress applied to the sensing area from the outside, preventing stress from acting directly on critical parts of the sensor and reducing the risk of sensor damage due to stress concentration. At the same time, the buffer zone can reduce the influence of external interference on the sensing area, ensuring the accuracy of the sensor in acquiring pulse pressure changes. This helps to improve the stability and reliability of the entire pressure acquisition unit.

[0058] More preferably, the anti-pulse sensing connection portion forms a gradual transition structure, with its expansion amplitude near the first end of the pulse sensing area being greater than the expansion amplitude of the second end connecting to the anti-pulse sensing area, the ratio of the expansion amplitudes being 1.5:1 to 4:1. In this embodiment, a ratio of 2:1 is preferred. This design effectively buffers and disperses stress, preventing stress concentration from damaging the connection portion when the wrist moves or is subjected to external force. Simultaneously, the gradual transition makes the connection portion more naturally integrated with different sensing areas, reducing signal transmission interference and ensuring accurate acquisition of the anti-pulse signal.

[0059] Further preferably, the extension range of the second end of the gradient transition structure is 5mm to 8mm. This range ensures a good connection with the reverse pulse sensing area while effectively dispersing stress and avoiding excessive local stress. Simultaneously, a suitable extension range helps stabilize signal transmission, improves the quality of reverse pulse signal acquisition, and enhances the accuracy of reverse pulse detection in traditional Chinese medicine pulse diagnosis.

[0060] The above description is only a preferred embodiment of the present utility model and is not intended to limit the present utility model. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present utility model should be included within the protection scope of the present utility model.

Claims

1. A pressure acquisition unit for pulse diagnosis in Traditional Chinese Medicine, characterized in that: The system includes a flexible base layer, which comprises a base segment and a cable interface at one end thereon. The base segment is provided with a cun pulse sensing area, a guan pulse sensing area, and a chi pulse sensing area corresponding to the cun pulse, guan pulse, and chi pulse diagnostic positions on the human wrist. Each sensing area is connected to a conductive connection part, and the end of each sensing area away from the cable interface is formed as a free end. It also includes a reverse pulse sensing connection part with a corresponding pulse sensing area branch extension, and the reverse pulse sensing connection part has a reverse pulse sensing area at its end. Each sensing area is equipped with a thin-film piezoresistive sensor for collecting pressure changes on the pulse position; the thin-film piezoresistive sensor is electrically connected to the ribbon cable interface through conductive connecting parts and conductive components on the surface of the reverse sensing connecting parts, and adjacent conductive components are sealed and fixed with insulating sealant.

2. The pressure acquisition unit for traditional Chinese medicine pulse diagnosis according to claim 1, characterized in that: An isolation groove is provided between adjacent sensing areas of the cun pulse sensing area, guan pulse sensing area, and chi pulse sensing area, extending along the width direction of the flexible base layer; the isolation groove forms an open end on the side near the free end of the sensing area and a closed end on the side near the base segment, releasing the deformation stress of adjacent sensing areas through the open end.

3. The pressure acquisition unit for traditional Chinese medicine pulse diagnosis according to claim 2, characterized in that: The width of the isolation groove is no more than 10 mm.

4. The pressure acquisition unit for traditional Chinese medicine pulse diagnosis according to claim 2, characterized in that: The root of the closed end is provided with a tear-resistant rounded corner.

5. The pressure acquisition unit for traditional Chinese medicine pulse diagnosis according to claim 1, characterized in that: A through-type stress buffer groove is provided on the reverse-pulse induction connection part. The stress buffer groove is arranged along the extension direction of the reverse-pulse induction connection part, and its groove outline has a streamlined structure with a gradually narrowing shape, which is used to reduce the deformation constraint of the flexible base layer when detecting the reverse pulse position of the radial artery at the wrist.

6. The pressure acquisition unit for traditional Chinese medicine pulse diagnosis according to claim 1, characterized in that: The cun pulse sensing area, guan pulse sensing area, and chi pulse sensing area have the same geometric shape and size parameters, and their outer contour is one of rectangle, ellipse, or racetrack shape; wherein, the extension length of each sensing area along the length direction of the flexible base layer is 3-50mm, the expansion range along the width direction is 3-15mm, and the dimension in the length direction is 1.5-5 times the dimension in the width direction.

7. The pressure acquisition unit for traditional Chinese medicine pulse diagnosis according to claim 1, characterized in that: The anti-guan pulse sensing area has the same geometry as the cun pulse sensing area, the guan pulse sensing area and the chi pulse sensing area, the extension length along the length direction of the flexible base layer is 3-15mm, and the expansion range along the width direction is 3-50mm.

8. The pressure acquisition unit for traditional Chinese medicine pulse diagnosis according to claim 1, characterized in that: The thin-film piezoresistive sensor has a protective structure around the sensing area. The closed boundary formed by the protective structure along the contour of the sensing area is equidistant from the edge of the sensing area by 0.5-3.0 mm, forming a circumferentially continuous stress buffer zone.

9. The pressure acquisition unit for traditional Chinese medicine pulse diagnosis according to claim 1, characterized in that: The anti-pulse sensing connection portion forms a gradual transition structure, wherein the expansion amplitude near the first end of the pulse sensing area is greater than the expansion amplitude of the second end connected to the anti-pulse sensing area, and the expansion amplitude ratio is 1.5:1 to 4:

1.

10. The pressure acquisition unit for traditional Chinese medicine pulse diagnosis according to claim 9, characterized in that: The extension range of the second end of the gradient transition structure is 5mm to 8mm.

Images