A tonometric pressure pulse wave measuring device and method

Abstract

The application discloses a tension method pressure pulse wave measuring device and method, the tension method pressure pulse wave measuring device includes pressure pulse wave sensor, preprocessing circuit, analog-digital conversion circuit and processor. A plurality of pressure sensing units of the pressure pulse wave sensor can measure the pressure pulse wave of the superficial artery and output first analog signals respectively, the first analog signals are sequentially processed by the preprocessing circuit and the analog-digital conversion circuit to obtain digital signals, the processor can calculate characteristic values of the digital signals, and at least two pressure sensing units with the same characteristic values are selected as target pressure sensing units, and the digital signals measured by the target pressure sensing units are output as pressure pulse wave signals. Since the measuring method can measure the pressure pulse wave based on one pulse cycle, and the measuring signals of the plurality of pressure sensing units are compared horizontally in one pulse cycle of the pressure sensing unit, the pressure pulse wave can be accurately detected, and the measuring efficiency is higher.

Description

TECHNICAL FIELD

[0001] The present application relates to the field of tension method pulse wave measurement, in particular to a tension method pressure pulse wave measurement device and method. BACKGROUND

[0002] Currently, the tension method is used to measure pressure pulse wave and blood pressure, including continuous blood pressure, which is usually based on the characteristic value of the pressure pulse wave of two pulse cycles before and after a sensing unit to determine whether the local part of the artery is in a flat state, and further calculate the blood pressure value. This whole process requires continuous pressure on the measured part of the artery to obtain the characteristic value of at least two constant pressure pulse wave signals. That is, it takes a long time to determine whether the local part of the artery is in a flat state. When the human body is in a state of severe blood pressure fluctuation, the pressure pulse wave of two pulse cycles before and after a sensing unit will also fluctuate severely, especially the interference caused by the sliding of the sensing unit relative to the detection part, which makes it impossible to detect the pressure pulse wave with equal characteristic values, thereby failing to detect the pressure pulse wave. Moreover, the longer the measurement time, the more constraints on the measured person and the measuring equipment, the greater the possibility of failure, the lower the success rate, and of course the lower the efficiency. SUMMARY

[0003] The present application provides a tension method pressure pulse wave measurement device and method to solve the problem of low measurement accuracy and low efficiency caused by long measurement time of pulse wave measurement.

[0004] In one embodiment, a tension method pressure pulse wave measurement device is provided, comprising:

[0005] A pressure pulse wave sensor comprising a pressure sensing unit array, the pressure sensing unit array comprising at least three pressure sensing units, the pressure sensing unit comprising a pressing plane; the pressure pulse wave sensor is configured to compress the superficial artery through the pressing plane, measure the pressure pulse wave of the superficial artery, and output a first analog signal of the pressure pulse wave;

[0006] A preprocessing circuit electrically connected to the pressure pulse wave sensor, configured to preprocess the first analog signal to obtain a second analog signal;

[0007] An analog-to-digital conversion circuit electrically connected to the preprocessing circuit, configured to convert the second analog signal into a digital signal;

[0008] A processor electrically connected to the analog-to-digital conversion circuit, configured to accept the digital signal; the processor is further configured to calculate the characteristic value of the digital signal, the characteristic value including the maximum value and / or the minimum value;

[0009] The processor is configured to compare the characteristic values within a preset time period, and select at least two pressure sensing units with equal characteristic values as target pressure sensing units; and the processor is further configured to output the digital signals of the target pressure sensing units as pressure pulse wave signals.

[0010] In one embodiment:

[0011] The preset time period includes a time period of at least one cycle of a detected pulse wave.

[0012] In one embodiment:

[0013] The pressure sensing unit is a resistance type pressure sensing unit or a capacitance type pressure sensing unit.

[0014] In one embodiment:

[0015] The device further comprises a pressing mechanism and a driving unit, the driving unit is electrically connected to the pressing mechanism and the processor, and the processor is configured to control the pressing mechanism to push the pressure pulse wave sensor to press the superficial artery through the driving unit.

[0016] In one embodiment, a tension method pressure pulse wave measuring device is provided, comprising:

[0017] A pressure pulse wave sensor comprising an array of pressure sensing units, the array of pressure sensing units comprising at least three pressure sensing units, the pressure sensing units comprising a pressing plane; the pressing plane covers the pressure sensing units; the pressure pulse wave sensor is configured to compress a superficial artery through the pressing plane, measure a pressure pulse wave of the superficial artery, and output a first analog signal of the pressure pulse wave.

[0018] A processor electrically connected to the pressure pulse wave sensor, configured to process the first analog signal to obtain a digital signal, and calculate a characteristic value of the digital signal, the characteristic value comprising a maximum value and / or a minimum value.

[0019] The processor is further configured to compare the characteristic values within a preset time period, and select at least two pressure sensing units with equal characteristic values as target pressure sensing units; and the processor is further configured to output the digital signals of the at least two target pressure sensing units as pressure pulse wave signals.

[0020] In one embodiment:

[0021] The preset time period includes a time period of at least one cycle of a detected pulse wave.

[0022] In one embodiment:

[0023] The pressure sensing unit is a resistance type pressure sensing unit or a capacitance type pressure sensing unit.

[0024] In one embodiment:

[0025] The device further comprises a pressing mechanism and a driving unit, the driving unit being electrically connected to the pressing mechanism and the processor, and the processor being configured to control the pressing mechanism to push the pressure pulse wave sensor to press the superficial artery via the driving unit.

[0026] In one embodiment:

[0027] The processor comprises a pre-processing circuit and an analog-to-digital conversion circuit, the pre-processing circuit being configured to pre-process the first analog signal to obtain a second analog signal, and the analog-to-digital conversion circuit being configured to convert the second analog signal into a digital signal.

[0028] In one embodiment, a tension method pressure pulse wave measurement method is provided:

[0029] The method comprises the following steps:

[0030] Obtaining at least three pressure sensing units of a pressure pulse wave sensor to press a superficial artery, measuring a pressure pulse wave of the superficial artery, and outputting a first analog signal of the pressure pulse wave;

[0031] Pre-processing the first analog signal to obtain a second analog signal, and converting the second analog signal into a digital signal;

[0032] Calculating a characteristic value of the digital signal, the characteristic value comprising a maximum value and / or a minimum value;

[0033] Comparing the characteristic value of the digital signal within a preset time period, selecting at least two pressure sensing units with equal characteristic values as target pressure sensing units, and outputting the digital signal of the target pressure sensing units as a pressure pulse wave signal.

[0034] In one embodiment:

[0035] The preset time period comprises a time period of at least one cycle of a detected pulse wave.

[0036] In one embodiment:

[0037] The pressure sensing unit is a resistance type pressure sensing unit or a capacitance type pressure sensing unit.

[0038] In one embodiment:

[0039] Before obtaining the first analog signal, the pressing mechanism is controlled to drive the pressure pulse wave sensor to press the superficial artery.

[0040] The tension method pressure pulse wave measurement device and method in the above embodiments includes a pressure sensing unit array of a pressure pulse wave sensor comprising at least three pressure sensing units. Multiple pressure sensing units can measure the pressure pulse wave of superficial arteries and output a first analog signal respectively. The first analog signal is processed sequentially by a preprocessing circuit and an analog-to-digital conversion circuit to obtain a digital signal. The processor can calculate the feature value of the digital signal and select at least two pressure sensing units with the same feature value as target pressure sensing units. The digital signal measured by the target pressure unit is output as a pressure pulse wave signal. In other words, this tension-based pressure pulse wave measurement device can determine an effective and accurate pressure pulse wave signal through lateral comparison of multiple pressure sensing units, without the need for longitudinal comparison of the detection signals of two consecutive pulse wave cycles of the pressure sensing unit. Therefore, since this measurement method can measure the pressure pulse wave based on one pulse cycle, even when the human body is in a state of drastic blood pressure fluctuations, the pressure pulse wave can still be accurately detected even if there are drastic fluctuations in the pressure pulse wave between two consecutive pulse wave cycles. In particular, it can minimize interference caused by the sliding of the sensing unit relative to the detection site. Furthermore, since there is no need to perform longitudinal comparison of the detection signals of two consecutive pulse wave cycles of the pressure sensing unit, lateral comparison of the measurement signals of multiple pressure sensing units within one pulse wave cycle of the pressure sensing unit can accurately detect the pressure pulse wave, resulting in a high monitoring success rate and higher measurement efficiency. Attached Figure Description

[0041] Figure 1 This is a structural block diagram of a pressure pulse wave measuring device in one embodiment;

[0042] Figure 2 This is a structural block diagram of a pressure pulse wave measuring device in one embodiment;

[0043] Figure 3 This is a structural block diagram of a pressure pulse wave measuring device in one embodiment;

[0044] Figure 4 This is a structural block diagram of a pressure pulse wave measuring device in one embodiment;

[0045] Figure 5 A flowchart illustrating the steps of a pressure pulse wave measurement method in one embodiment;

[0046] Figure 6 A flowchart illustrating the steps of a pressure pulse wave measurement method in one embodiment;

[0047] Among them, 1-pressure pulse wave sensor, 2-preprocessing circuit, 3-analog-to-digital conversion circuit, 4-processor, 5-pressing mechanism, and 6-drive unit. Detailed Implementation

[0048] In the prior art, a pressure pulse wave sensor is provided with multiple pressure sensing units, which aims to improve the fault tolerance rate to ensure that there is always a pressure sensing unit that can press the superficial artery when a user with different wrist sizes wears the measurement. The measurement principle in the prior art is as described in the background: generally based on the characteristic values of the pressure pulse wave of two pulse cycles before and after a sensing unit to determine whether the local artery is in a flat state, and further calculate the blood pressure value. The comparison information is the characteristic values of the pressure pulse wave of two pulse cycles before and after the same pressure sensing unit.

[0049] The present application proposes a brand new pressure pulse wave sensor and method, which has a different measurement principle from the prior art. The measurement principle of the present application is as follows: multiple pressure sensing units press the superficial artery to obtain corresponding pressure pulse wave signals, compare the characteristic values of the pressure pulse wave signals of multiple pressure sensing units within a preset time period, select at least two pressure sensing units with the same characteristic values as target pressure sensing units, and output the pressure pulse wave signals measured by the target pressure sensing units as the final measurement value. The comparison information is the characteristic values of the pressure pulse wave of different pressure sensing units in the same pulse cycle.

[0050] The comparison of the characteristic values of the pressure pulse wave signals of multiple pressure sensing units in the present application can be completed within the cycle time of a pulse wave. Of course, the cycle time of multiple pulse waves can also be measured and compared to take the average value, further improving the accuracy of the measurement.

[0051] Moreover, the at least two selected pressure sensing units do not measure equal pressure pulse wave data in the initial measurement stage and before the superficial artery is flattened. When the superficial artery is flattened, the measured pressure pulse wave data is equal. Based on the above analysis, the pressing planes of the at least two selected pressure sensing units can be pressure sensing planes or flat pressure sensing areas, and the two pressing planes of the selected pressure sensing units can have the following characteristic relationship:

[0052] Firstly, the pressing planes of the at least two pressure sensing units are located in different planes, including the initial state being located in different planes, and the initial state being located in the same plane but being located in different planes in the measurement state, and the pressing planes of the at least two pressure sensing units cannot be completely overlapped through plane transformation;

[0053] Secondly, the pressing planes of the at least two pressure sensing units are located in the same plane and have different shapes and / or different areas, and the pressing planes of the at least two pressure sensing units cannot be completely overlapped through translation transformation;

[0054] The third type: the pressing planes of the at least two pressure sensing units are located in the same plane, have the same non-circular shape, the same area, and different rotation angles, and the pressing planes of the at least two pressure sensing units cannot be completely overlapped by translational transformation;

[0055] The fourth type: the pressing planes of the at least three pressure sensing units are located in the same plane, have the same non-circular shape, the same area, and the same rotation angle; the at least two first pressure sensing units are arranged in a row and have a common side line; the at least two first pressing planes are completely overlapped by translational transformation along the shortest straight line, and the second pressing plane cannot be completely overlapped with the first pressing plane by translational transformation along the straight line.

[0056] The fifth type: the pressing planes of the at least three pressure sensing units are located in the same plane, have the same circular shape, and the same area; the at least two first pressure sensing units are arranged in a row and have a common side line; the at least two first pressing planes are completely overlapped by translational transformation along the shortest straight line, and the second pressing plane cannot be completely overlapped with the first pressing plane by translational transformation along the straight line.

[0057] In addition to the above five types of feature relationships, the selected two pressing planes can also have other feature relationships, which are not listed here.

[0058] The application will be described in further detail below with reference to the drawings. In different embodiments, similar elements are denoted by similar reference numerals. In the following embodiments, many details are described in order to make the application better understood. However, those skilled in the art can easily recognize that some features can be omitted in different cases, or can be replaced by other elements, materials, or methods. In some cases, some operations related to the application are not shown or described in the specification in order to avoid the core part of the application being overwhelmed by too much description, and it is not necessary to describe these related operations in detail for those skilled in the art based on the description in the specification and general technical knowledge in the art.

[0059] In addition, the features, operations, or characteristics described in the specification can be combined in any appropriate manner to form various embodiments. Meanwhile, the steps or actions in the method description can also be sequentially adjusted or adjusted in a manner that is obvious to those skilled in the art. Therefore, the order in the specification and the drawings is only for the purpose of clearly describing a certain embodiment, and does not mean that it is the necessary order, unless otherwise stated that a certain order must be followed.

[0060] The serial numbers of components used herein, such as "first", "second", etc., are only used to distinguish the described objects, and do not have any sequential or technical meaning. Unless otherwise specified, "connection" and "coupling" as used in the present application include direct and indirect connections (couplings). One:

[0062] The present embodiment provides a tension method pressure pulse wave measuring device, which can be applied to wearable devices and handheld terminal devices. The tension method pressure pulse wave measuring device is used to measure human surface arterial pressure pulse wave information. The pressure pulse wave information is basic physiological information of the human body, and the pressure pulse wave information can be further used to calculate physiological parameters such as blood pressure.

[0063] The tension method pressure pulse wave measuring device is provided with at least three pressure sensing units. The sensing planes of the at least three pressure sensing units have a special positional relationship with each other, so that the tension method pressure pulse wave measuring device can measure the pressure pulse wave information of the surface artery within one pulse cycle, with high measurement success rate and high measurement efficiency.

[0064] Please refer to Figure 1 The tension method pressure pulse wave measuring device of the present embodiment mainly includes a pressure pulse wave sensor 1, a preprocessing circuit 2, an analog-to-digital conversion circuit 3, and a processor 4. The pressure pulse wave sensor 1, the preprocessing circuit 2, the analog-to-digital conversion circuit 3, and the processor 4 are electrically connected in sequence to form communication. Of course, in the actual circuit, the processor 4 can also directly connect and control the pressure pulse wave sensor 1, the preprocessing circuit 2, and the analog-to-digital conversion circuit 3. The pressure pulse wave sensor 1 is used to measure the surface artery and output a plurality of first analog signals. The preprocessing circuit 2, the analog-to-digital conversion circuit 3, and the processor 4 sequentially process the plurality of first analog signals and output a pressure pulse wave signal.

[0065] The pressure pulse wave sensor 1 includes a pressure sensing unit array, which includes at least three pressure sensing units. Each pressure sensing unit includes a pressing plane, which can be a pressure sensing plane. The middle part of the pressure sensing plane has a planar sensing area, which can collect the pressure of the extruded surface artery and convert it into an electrical signal. This allows the pressure pulse wave sensor to be used to press the surface artery through the pressing plane, measure the pressure pulse wave of the surface artery, and output the first analog signal of the pressure pulse wave.

[0066] Each pressure sensing unit outputs one first analog signal. The present pressure pulse wave sensor 1 includes at least three pressure sensing units, which output at least three first analog signals.

[0067] The pressure pulse wave sensor 1 can include a plurality of pressure sensing unit arrays, each of which includes at least three pressure sensing units; for example, the pressure pulse wave sensor 1 includes two pressure sensing unit arrays, each of which includes four pressure sensing units, so that the pressure pulse wave sensor 1 includes an 8 pressure sensing unit array distributed in a 2x4 array. The column length direction of the pressure sensing unit array is perpendicular to the length direction of the superficial artery, so that the pressure sensing units in different columns can be guaranteed to press the superficial artery at the same time, and the pressure sensing units in the same column can be guaranteed to press the superficial artery at the same time, thereby ensuring that more required pressure sensing units press the superficial artery at the same time.

[0068] The pressure sensing unit can be a resistance type pressure sensing unit or a capacitance type pressure sensing unit. The plurality of pressure sensing units of the pressure pulse wave sensor 1 all adopt resistance type pressure sensing units, or the plurality of pressure sensing units of the pressure pulse wave sensor 1 all adopt capacitance type pressure sensing units.

[0069] The preprocessing circuit 2 is electrically connected to the pressure pulse wave sensor 1, and is used to acquire a first analog signal and preprocess the first analog signal to obtain a second analog signal. The preprocessing circuit 2 can preprocess a plurality of first analog signals to obtain a plurality of second analog signals, respectively.

[0070] The preprocessing of the preprocessing circuit 2 can at least include one or more of pressure sensing unit selection, signal filtering, and signal amplification. The pressure sensing unit selection is used to select one or more first analog signals from a plurality of pressure sensing units, such as setting different measurement modes, and the selected pressure sensing units are different in different measurement modes. The signal filtering is used to filter the interference signals in the first analog signal. The signal amplification is used to amplify the waveform of the first analog signal, which is beneficial to the calculation of the analog signal in the subsequent processing process.

[0071] The analog-to-digital conversion circuit 3 is electrically connected to the preprocessing circuit 2, and is used to acquire the second analog signal processed by the preprocessing circuit 2. The analog-to-digital conversion circuit 3 is used to perform analog-to-digital conversion on the second analog signal, and convert the second analog signal into a digital signal. Similarly, the analog-to-digital conversion circuit 3 can also convert one or more second analog signals into one or more digital signals.

[0072] The processor 4 is electrically connected to the analog-to-digital conversion circuit 3, and is used to receive the digital signal converted by the analog-to-digital conversion circuit 3. The processor 4 is used to find at least two target pressure sensing units according to a plurality of digital signals, and then take the digital signal of the target pressure sensing unit as a pressure pulse wave signal output.

[0073] The processor 4 is configured to find at least two target pressure sensing units from the plurality of digital signals, and output a digital signal of the target pressure sensing unit as a pressure pulse wave signal. The processor 4 mainly includes the following steps:

[0074] The processor 4 calculates a characteristic value of the digital signal, and the characteristic value can include a maximum value and / or a minimum value of the pressure pulse wave.

[0075] The processor 4 compares the plurality of characteristic values within a preset time period, and selects at least two pressure sensing units with equal characteristic values as the target pressure sensing units.

[0076] The preset time period includes a time period of at least one cycle of the detected pulse wave, and in principle, the preset time period can be set as a time period of one cycle of the detected pulse wave. Of course, the time period of multiple cycles can also be compared, and the characteristic values of the multiple cycles are averaged.

[0077] The processor 4 determines that the characteristic values are equal in the comparison process, and the equal characteristic values include that a difference between the characteristic values is within a preset range, for example, the two characteristic values have a small difference, and the difference can be ignored, and then the two characteristic values are considered to be equal.

[0078] In addition, the selected at least two pressure sensing units do not have equal pressure pulse wave data before the superficial artery is flattened, and have equal pressure pulse wave data when the superficial artery is flattened.

[0079] The processor 4 can select two pressure sensing units with equal characteristic values as the target pressure sensing units, and the two target pressure sensing units can accurately determine and measure the pressure pulse wave data of the superficial artery.

[0080] In other embodiments, the processor 4 can also select three pressure sensing units with equal characteristic values as the target pressure sensing units, and the three target pressure sensing units can also accurately determine and measure the pressure pulse wave data of the superficial artery.

[0081] In the embodiment, the pressure sensing unit array of the pressure pulse wave sensor 1 includes at least three pressure sensing units, the plurality of pressure sensing units can measure the pressure pulse wave of the superficial artery and output first analog signals respectively, the first analog signals are sequentially processed by the preprocessing circuit 2 and the analog-to-digital conversion circuit 3 to obtain digital signals, the processor 4 can calculate characteristic values of the digital signals, and at least two pressure sensing units with the same characteristic values are selected as target pressure sensing units, and the digital signals measured by the target pressure sensing units are output as pressure pulse wave signals. In other words, the tension method pressure pulse wave measuring device can determine effective and accurate pressure pulse wave signals through lateral comparison of the plurality of pressure sensing units, without longitudinal comparison of the detection signals of the front and back two pulse wave periods of the pressure sensing unit. Therefore, since the measurement method can measure the pressure pulse wave based on one pulse period, even if the pressure pulse wave of the front and back two pulse periods appears severe fluctuation when the human body is in a state of severe blood pressure fluctuation, the pressure pulse wave can still be accurately detected. Moreover, since longitudinal comparison of the detection signals of the front and back two pulse wave periods of the pressure sensing unit is not required, lateral comparison of the measurement signals of the plurality of pressure sensing units in one pulse wave period of the pressure sensing unit can accurately detect the pressure pulse wave, and the measurement efficiency and the detection success rate are higher.

[0082] Please refer to Figure 2 In an embodiment, the tension method pressure pulse wave measuring device further includes a pressing mechanism 5 and a driving unit 6, the pressing mechanism 5 is connected with the pressure pulse wave sensor 1, the driving unit 6 is electrically connected with the pressing mechanism 5 and the processor 4, and the processor 4 is configured to control the pressing mechanism 5 to push the pressure pulse wave sensor 1 to press the superficial artery through the driving unit 6.

[0083] In the embodiment, the driving unit 6 can also be integrated into the processor 4, the pressing mechanism 5 includes a fixed part and a driving part, the fixed part is fixedly installed, the driving part can move telescopically relative to the fixed part, and the driving part is fixedly connected or abuttingly connected with the pressure pulse wave sensor 1, and the telescopic movement of the driving part pushes the pressure pulse wave sensor 1 to press the superficial artery. Two:

[0085] The embodiment provides a tension method pressure pulse wave measuring device, which can be applied to a wearable device or a handheld terminal device. The tension method pressure pulse wave measuring device is used for measuring pressure pulse wave information of a superficial artery of a human body. The pressure pulse wave information is basic physiological information of the human body, and can be used for calculating physiological parameters such as blood pressure.

[0086] The tension method pressure pulse wave measuring device is provided with at least three pressure sensing units, and the sensing planes of the at least three pressure sensing units have a special positional relationship with each other, so that the tension method pressure pulse wave measuring device can measure the pressure pulse wave information of the superficial artery within one pulse cycle, and has high measurement success rate and high measurement efficiency.

[0087] Please refer to Figure 3 The tension method pressure pulse wave measuring device of the embodiment mainly comprises a pressure pulse wave sensor 1 and a processor 4, the pressure pulse wave sensor 1 and the processor 4 are electrically connected to form communication. The pressure pulse wave sensor 1 is used for measuring the superficial artery and outputting a plurality of first analog signals, and the processor 4 processes the plurality of first analog signals and outputs a pressure pulse wave signal. The processor 4 comprises a preprocessing circuit 2 and an analog-to-digital conversion circuit 3, the analog-to-digital conversion circuit 3 is electrically connected to the preprocessing circuit 2, and the preprocessing circuit 2 and the analog-to-digital conversion circuit 3 are integrated in the processor 4.

[0088] The pressure pulse wave sensor 1 comprises a pressure sensing unit array, the pressure sensing unit array comprises at least three pressure sensing units, each pressure sensing unit comprises a pressing plane, the pressing plane can be a pressure sensing plane, the middle part of the pressure sensing plane has a plane sensing area, and the plane sensing area can collect the pressure of the extruded superficial artery and convert it into an electric signal. So that the pressure pulse wave sensor can be used for: pressing the superficial artery through the pressing plane, measuring the pressure pulse wave of the superficial artery, and outputting the first analog signal of the pressure pulse wave.

[0089] Each pressure sensing unit outputs a first analog signal, the pressure pulse wave sensor 1 comprises at least three pressure sensing units, and outputs at least three first analog signals.

[0090] The pressure pulse wave sensor 1 can comprise a plurality of pressure sensing unit arrays, each pressure sensing unit array comprises at least three pressure sensing units; for example, the pressure pulse wave sensor 1 comprises two pressure sensing unit arrays, each pressure sensing unit array comprises four pressure sensing units, and the pressure pulse wave sensor 1 comprises 8 pressure sensing units arranged in a 2x4 array. The column length direction of the pressure sensing unit array is perpendicular to the length direction of the superficial artery, so that the pressure sensing units in different columns can extrude the superficial artery at the same time, and the plurality of pressure sensing units in the same column can extrude the superficial artery at the same time, thereby ensuring that more required pressure sensing units can extrude the superficial artery at the same time.

[0091] The pressure sensing unit can be a resistance type pressure sensing unit or a capacitance type pressure sensing unit. The plurality of pressure sensing units of the pressure pulse wave sensor 1 all adopt resistance type pressure sensing units, or the plurality of pressure sensing units of the pressure pulse wave sensor 1 all adopt capacitance type pressure sensing units.

[0092] The processor 4 is electrically connected to the pressure pulse wave sensor 1. The pre-processing in the pre-processing circuit 2 in the processor 4 can at least include one or more of pressure sensing unit selection, signal filtering, and signal amplification. The pressure sensing unit selection is used to select one or more first analog signals from a plurality of pressure sensing units, such as setting different measurement modes, and the selected pressure sensing units are different in different measurement modes. The signal filtering is used to filter the interference signals in the first analog signals to improve the effectiveness or accuracy of the first analog signals. The signal amplification is used to amplify the waveform of the first analog signals, which is beneficial to the calculation of the analog signals in the subsequent processing process. The pre-processing circuit 2 is used to obtain the first analog signals and pre-process the first analog signals to obtain the second analog signals. The pre-processing circuit 2 can pre-process a plurality of first analog signals to obtain a plurality of second analog signals, respectively.

[0093] The analog-to-digital conversion circuit 3 in the processor 4 is used to obtain the second analog signals processed by the pre-processing circuit 2, and is used to perform analog-to-digital conversion on the second analog signals to convert the second analog signals into digital signals. Similarly, the analog-to-digital conversion circuit 3 can also convert one or more second analog signals into one or more digital signals.

[0094] The processor 4 is also used to find at least two target pressure sensing units according to the plurality of digital signals, and then outputs the digital signals of the target pressure sensing units as the pressure pulse wave signals.

[0095] In this embodiment, the processor 4 is used to find at least two target pressure sensing units according to the plurality of digital signals, and then outputs the digital signals of the target pressure sensing units as the pressure pulse wave signals. The main steps include:

[0096] The processor 4 calculates the characteristic values of the digital signals, which can include the maximum value and / or the minimum value of the pressure pulse wave;

[0097] The processor 4 compares a plurality of characteristic values within a preset time period, and selects at least two pressure sensing units with equal characteristic values as the target pressure sensing units.

[0098] The preset time period includes the time period of at least one cycle of the detected pulse wave, and in principle, the preset time period can be set as the time period of one cycle of the detected pulse wave. The time periods of a plurality of cycles can also be compared, and the average value of the characteristic values of the plurality of cycles is taken.

[0099] The processor 4 determines that the characteristic values are equal in the comparison process. The characteristic values equal include that the difference between the characteristic values is within a preset range, for example, the difference between two characteristic values is small, and the difference can be ignored, then the two characteristic values are considered to be equal.

[0100] And, the at least two selected pressure sensing units measure pressure pulse wave data that are not equal before the superficial artery is flattened, and measure pressure pulse wave data that are equal when the superficial artery is flattened.

[0101] The processor 4 can select two pressure sensing units with equal characteristic values as target pressure sensing units, and the two target pressure sensing units can accurately determine and measure pressure pulse wave data of the superficial artery.

[0102] In other embodiments, the processor 4 can also select three pressure sensing units with equal characteristic values as target pressure sensing units, and the three target pressure sensing units can also accurately determine and measure pressure pulse wave data of the superficial artery.

[0103] In this embodiment, the pressure sensing unit array of the pressure pulse wave sensor 1 includes at least three pressure sensing units, and the multiple pressure sensing units can measure pressure pulse waves of the superficial artery and output first analog signals respectively. The first analog signals are processed by the processor 4 to obtain digital signals, the processor 4 can calculate characteristic values of the digital signals, and select at least two pressure sensing units with equal characteristic values as target pressure sensing units, and the digital signals measured by the target pressure sensing units are output as pressure pulse wave signals. In other words, the tension method pressure pulse wave measuring device can determine effective and accurate pressure pulse wave signals through lateral comparison of multiple pressure sensing units, without longitudinal comparison of detection signals of the front and back two pulse wave periods of the pressure sensing units. Therefore, since the measurement method can measure pressure pulse waves based on one pulse period, when the human body is in a state of severe blood pressure fluctuation, even if the pressure pulse waves of the front and back two pulse periods fluctuate severely, the pressure pulse wave can still be accurately detected. Moreover, since longitudinal comparison of detection signals of the front and back two pulse wave periods of the pressure sensing units is not required, lateral comparison of measurement signals of multiple pressure sensing units in one pulse wave period of the pressure sensing units can accurately detect the pressure pulse wave, and the measurement efficiency and detection success rate are higher.

[0104] Please refer to Figure 4 In one embodiment, the tension method pressure pulse wave measuring device further includes a pressing mechanism 5 and a driving unit 6. The pressing mechanism 5 is connected to the pressure pulse wave sensor 1, and the driving unit 6 is electrically connected to the pressing mechanism 5 and the processor 4. The processor 4 is configured to control the pressing mechanism 5 to push the pressure pulse wave sensor 1 to press the superficial artery through the driving unit 6.

[0105] The driving unit 6 can also be integrated into the processor 4. The pressing mechanism 5 includes a fixed part and a driving part. The fixed part is fixedly installed, and the driving part is telescopically movable relative to the fixed part. The driving part is fixedly connected or abuttingly connected to the pressure pulse wave sensor 1. Telescopic movement of the driving part pushes the pressure pulse wave sensor 1 to extrude the superficial artery. Three:

[0107] The present embodiment provides a tension method pressure pulse wave measurement method. The measurement method can be implemented by using the tension method pressure pulse wave measurement device of the above-mentioned embodiment one or embodiment two. When the measurement method is implemented by using the tension method pressure pulse wave measurement device of the above-mentioned embodiment one, it is executed by the separately-arranged preprocessing circuit 2, the analog-digital conversion circuit 3, and the processor 4. When the measurement method is implemented by using the tension method pressure pulse wave measurement device of the above-mentioned embodiment two, it is executed by the processor 4 integrated with the preprocessing circuit 2 and the analog-digital conversion circuit 3.

[0108] For reference Figure 5 The tension method pressure pulse wave measurement method of the present embodiment includes the following steps:

[0109] S11: Obtain an analog signal;

[0110] The preprocessing circuit 2 obtains the pressure pulse wave sensor, extrudes the superficial artery by at least three pressure sensing units, measures the pressure pulse wave of the superficial artery, and outputs the first analog signal of the pressure pulse wave.

[0111] S12: Convert the analog signal into a digital signal;

[0112] The preprocessing circuit 2 obtains the second analog signal after preprocessing the first analog signal, and the analog-digital conversion circuit 3 converts the second analog signal into a digital signal.

[0113] The preprocessing circuit 2 can preprocess multiple first analog signals to obtain multiple second analog signals.

[0114] The preprocessing of the preprocessing circuit 2 can include at least one or more of pressure sensing unit selection, signal filtering, and signal amplification. The pressure sensing unit selection is used to select one or more first analog signals from multiple pressure sensing units, such as setting different measurement modes, and the selected pressure sensing units are different in different measurement modes. The signal filtering is used to filter the interference signal in the first analog signal to improve the effectiveness or accuracy of the first analog signal. The signal amplification is used to amplify the waveform of the first analog signal, which is beneficial to the calculation of the analog signal in the subsequent processing process.

[0115] The analog-digital conversion circuit 3 is configured to obtain the second analog signal processed by the pre-processing circuit 2, and the analog-digital conversion circuit 3 is configured to perform analog-digital conversion on the second analog signal to convert the second analog signal into a digital signal. Similarly, the analog-digital conversion circuit 3 can also convert one or more second analog signals into one or more digital signals.

[0116] S13: calculating a characteristic value of the digital signal;

[0117] The processor 4 calculates a characteristic value of the digital signal, and the characteristic value can include a maximum value and / or a minimum value of the pressure pulse wave.

[0118] S14: selecting a target pressure sensing unit to output a pressure pulse wave signal.

[0119] The processor 4 compares the characteristic values of the digital signals in a preset time period, selects at least two pressure sensing units with equal characteristic values as target pressure sensing units, and outputs the digital signals of the target pressure sensing units as the pressure pulse wave signal.

[0120] The preset time period includes a time period of at least one cycle of the detected pulse wave, and in principle, the preset time period can be set as a time period of one cycle of the detected pulse wave. The characteristic values of multiple cycles can also be compared, and the average value of the characteristic values of the multiple cycles is taken.

[0121] The processor 4 determines that the characteristic values are equal in the comparison process, and the equal characteristic values include that the difference between the characteristic values is within a preset range, for example, the difference between two characteristic values is small and can be ignored, and then the two characteristic values are considered to be equal.

[0122] In addition, the at least two selected pressure sensing units do not measure equal pressure pulse wave data before the superficial artery is flattened, and measure equal pressure pulse wave data when the superficial artery is flattened.

[0123] The processor 4 can select two pressure sensing units with equal characteristic values as target pressure sensing units, and the two target pressure sensing units can accurately determine and measure the pressure pulse wave data of the superficial artery.

[0124] In other embodiments, the processor 4 can also select three pressure sensing units with equal characteristic values as target pressure sensing units, and the three target pressure sensing units can also accurately determine and measure the pressure pulse wave data of the superficial artery.

[0125] The tension method pressure pulse wave measuring method of the embodiment can measure pressure pulse waves based on one pulse cycle, and can accurately detect pressure pulse waves even when the blood pressure of the human body fluctuates greatly, i.e., even when the pressure pulse waves of two pulse cycles before and after fluctuate greatly. Moreover, the measuring signals of the plurality of pressure sensing units in one pulse cycle of the pressure sensing unit are compared horizontally, and the pressure pulse waves can be accurately detected, the measuring efficiency is higher, and the detection success rate is higher.

[0126] In one embodiment, the tension method pressure pulse wave measuring method further comprises the step of pressing the superficial artery.

[0127] Please refer to Figure 6 In the embodiment, the tension method pressure pulse wave measuring method comprises the following steps:

[0128] S21: pressing the superficial artery;

[0129] The processor 4 first controls the pressing mechanism 5 to drive the pressure pulse wave sensor 1 to press the superficial artery.

[0130] When the pressure pulse wave sensor 1 presses the superficial artery, the plurality of pressure sensing units on the pressure pulse wave sensor 1 that press the superficial artery respectively generate first analog signals, and transmit the first analog signals to the preprocessing circuit 2.

[0131] S22: obtaining the analog signal;

[0132] S23: converting the analog signal into a digital signal;

[0133] S24: calculating the characteristic value of the digital signal;

[0134] S25: selecting the target pressure sensing unit to output the pressure pulse wave signal.

[0135] The steps S22-S25 are the same as the steps S11-S14 described above, and will not be described again here.

[0136] The above description of the present application using specific examples is only applicable to help understand the present application, and cannot limit other applications of the present application. For those skilled in the art to which the present application belongs, according to the idea of the present application, a number of simple deductions, deformations or substitutions can be made.

Claims

1. A tonometric pressure pulse wave measuring device, characterized by, The tension method pressure pulse wave measuring device comprises: a pressure pulse wave sensor comprising a pressure sensing unit array, the pressure sensing unit array comprising at least three pressure sensing units, the pressure sensing units comprising a pressing plane; the pressure pulse wave sensor is configured to press a superficial artery through the pressing plane, measure a pressure pulse wave of the superficial artery, and output a first analog signal of the pressure pulse wave; a preprocessing circuit electrically connected to the pressure pulse wave sensor and configured to preprocess the first analog signal to obtain a second analog signal; an analog-to-digital conversion circuit electrically connected to the preprocessing circuit and configured to convert the second analog signal into a digital signal; a processor electrically connected to the analog-to-digital conversion circuit and configured to receive the digital signal; the processor is further configured to calculate a characteristic value of the digital signal, the characteristic value comprising a maximum value and / or a minimum value; the processor is configured to compare the characteristic values within a preset time period, and select at least two pressure sensing units with equal characteristic values as target pressure sensing units; the processor is further configured to output the digital signals of the target pressure sensing units as pressure pulse wave signals.

2. The tension method pressure pulse wave measuring device according to claim 1, wherein: the preset time period comprises a time period of at least one cycle of a detected pulse wave.

3. The tension method pressure pulse wave measuring device according to claim 1, wherein: the pressure sensing units are resistive pressure sensing units or capacitive pressure sensing units.

4. The tension method pressure pulse wave measuring device according to claim 1, further comprising a pressing mechanism and a driving unit, the driving unit being electrically connected to the pressing mechanism and the processor, and the processor being configured to control the driving unit to drive the pressing mechanism to press the pressure pulse wave sensor against the superficial artery. The tension method pressure pulse wave measuring device comprises:

5. A tonometric pressure pulse wave measuring device, characterized by a pressure pulse wave sensor comprising a pressure sensing unit array, the pressure sensing unit array comprising at least three pressure sensing units, the pressure sensing units comprising a pressing plane; the pressing plane covers the pressure sensing units; the pressure pulse wave sensor is configured to press a superficial artery through the pressing plane, measure a pressure pulse wave of the superficial artery, and output a first analog signal of the pressure pulse wave; a processor electrically connected to the pressure pulse wave sensor and configured to process the first analog signal to obtain a digital signal, and calculate a characteristic value of the digital signal, the characteristic value comprising a maximum value and / or a minimum value; the processor is further configured to compare the characteristic values within a preset time period, and select at least two pressure sensing units with equal characteristic values as target pressure sensing units; the processor is further configured to output the digital signals of the target pressure sensing units as pressure pulse wave signals.

6. The tension method pressure pulse wave measuring device according to claim 5, wherein: the preset time period comprises a time period of at least one cycle of a detected pulse wave.

7. The tension method pressure pulse wave measuring device according to claim 5, wherein: the pressure sensing units are resistive pressure sensing units or capacitive pressure sensing units. ​ 8.The tension method pressure pulse wave measuring device of claim 5, wherein: Further comprising a pressing mechanism and a driving unit, the driving unit being electrically connected to the pressing mechanism and the processor, the processor being configured to control the pressing mechanism to push the pressure pulse wave sensor to press the superficial artery via the driving unit. 9.The tension method pressure pulse wave measuring device of claim 5, wherein: The processor comprises a pre-processing circuit and an analog-to-digital conversion circuit, the pre-processing circuit being configured to pre-process the first analog signal to obtain a second analog signal, and the analog-to-digital conversion circuit being configured to convert the second analog signal into a digital signal. 10.A tension method pressure pulse wave measuring method, comprising the steps of: Obtaining a first analog signal of a pressure pulse wave signal by pressing a superficial artery with at least three pressure sensing units of a pressure pulse wave sensor and measuring a pressure pulse wave of the superficial artery; Pre-processing the first analog signal to obtain a second analog signal, and then converting the second analog signal into a digital signal; Calculating a characteristic value of the digital signal, the characteristic value comprising a maximum value and / or a minimum value; Comparing the characteristic value of the digital signal within a preset time period, and selecting at least two pressure sensing units with equal characteristic values as target pressure sensing units, and outputting the digital signal of the target pressure sensing units as a pressure pulse wave signal. 11.The tension method pressure pulse wave measuring method of claim 10, wherein: The preset time period comprises a time period of at least one cycle of a detected pulse wave. 12.The tension method pressure pulse wave measuring method of claim 10, wherein: The pressure sensing unit is a resistance type pressure sensing unit or a capacitance type pressure sensing unit. 13.The tension method pressure pulse wave measuring method of claim 10, wherein: Before obtaining the first analog signal, a pressing mechanism is controlled to drive the pressure pulse wave sensor to press the superficial artery. ​

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