CN102551684B - Pulse detecting system - Google Patents

Abstract

The invention discloses a pulse condition detection system, which comprises a pulse condition acquisition device for outputting an analog pulse condition signal, an analog signal conditioning module and a processor for conditioning the pulse condition analog signal; the analog signal conditioning module is connected with the pulse condition acquisition device and the The processor is electrically connected; the pulse acquisition device includes a three-way pulse sensor and a three-way pressure device; the pressure device is connected to the pulse sensor in one-to-one correspondence; the processor adjusts the output signal of the module according to the analog signal The pulse detection signal and the control signal for controlling the three-way pressurizing device are output. The pulse detection device has comprehensive detection performance, simple structure and good repeatability.

Description

Pulse detection system

technical field

The invention relates to the technical field of pulse condition detection, in particular to a pulse condition detection system and a method for using the system.

Background technique

The usual method of pulse diagnosis in traditional Chinese medicine is that the doctor of traditional Chinese medicine touches and presses the patient's Cunkou radial artery with fingers at the three parts of Cun, Guan and Chi, and feels the changes of the patient's pulse wave by applying different pressures such as floating, medium and sinking with the fingers. A series of pulse waves containing information such as pulse position, strength, trend, shape, width, and rhythm generated corresponding to pressures such as floating, neutral, and sinking are called pulse conditions. From the pulse condition information, the doctor can know whether the pulse is floating or sinking, whether it is solid or empty, whether it is large or small, fast or slow. Through this information, doctors can understand the patient's physiological state, but this traditional Chinese medicine pulse is very subjective; the diagnosis process is difficult to reproduce and difficult to learn, and it takes years or even decades to master.

In order to solve the shortcomings of traditional Chinese medicine pulse diagnosis, many researchers have made unremitting efforts in the objectification of pulse diagnosis for many years. Since the 1970s, researchers have developed a wide variety of sensors to collect and record pulse signals. The basic principle is to use sensors instead of finger pulses in traditional Chinese medicine to extract some characteristic information of pulse conditions in traditional Chinese medicine and convert them into electrical signals. It is then collected and processed.

Among the many sensors, there are mainly the following categories:

1. Photoelectric sensor

Photoplethysmography is used to measure pulse waves (including pulse waves in oscillometric blood pressure measurement), and its principle is to use photoelectric signals to measure changes in pulse volume. When the blood volume in the blood vessel changes, the degree of light absorption by the tissue changes accordingly, and this change can be measured by using a photoelectric sensor, which reflects the basic parameters of blood pulsation (including changes in frequency, amplitude, and pulse wave shape) ).

2. Solid state piezoresistive sensor

There are many ways to implement solid-state piezoresistive sensors. The solid-state piezoresistive sensor using polyvinylidene fluoride (PVDF) material is a more popular solid-state piezoresistive sensor. Compared with PZT piezoelectric ceramics, PVDF The piezoelectric constant of vinyl fluoride material is 10-20 times higher than that of PZT piezoelectric ceramics, while the density is only 1/4 of it.

Polyvinylidene fluoride has high strength and wide frequency response (0.1 ~ 10MHz), the material is thin and soft, and has good time and temperature stability.

The semiconductor piezoresistive sensor made of solid-state piezoresistive sensor is a composite sensor with an extremely thin multi-layer film structure, which is in the shape of a thin film or a finger cot. Provide pulsation force and static pressure signals, the signal processing amplifier in the sensor can amplify pulse condition and static pressure floating, medium and sinking signals respectively. The fixed part of the sensor can be in the form of a wrist guard, or a glove or a finger cot.

3. Other types of sensors

Other types of sensors such as light probe sensors and ultrasonic sensors have also appeared in practical applications.

The pulse sensors of many current pulse condition acquisition devices cannot be controlled separately, thus affecting the accuracy of pulse condition information acquisition, and the pulse condition acquisition devices all have very complicated mechanical structures, which are very bulky and cumbersome to move, and the data transmission method is limited to Wired transmission or copying through storage media, which brings inconvenience to use. At the same time, the use of these devices is aimed at a single measurement, and real-time detection cannot be achieved. Moreover, the human-computer interaction information of some devices is very limited, the interface is very unfriendly, and some can only know the relevant test status after uploading to the computer, which brings great inconvenience to the pulse condition measurement.

Contents of the invention

The object of the present invention is to provide a pulse condition detection device, so as to overcome the disadvantage that the pulse cutting pressure of the existing pulse condition detection device cannot be accurately controlled, let alone controlled independently.

A kind of pulse condition detection system provided for realizing the purpose of the present invention comprises the pulse condition acquisition device for outputting the pulse condition analog signal, the analog signal conditioning module and the processor for conditioning the pulse condition analog signal; the analog signal conditioning module is connected with The pulse condition collection device and the processor are electrically connected; the pulse condition collection device includes three-way pulse condition sensors and three-way pressure devices; the pressure devices are connected to the pulse condition sensors one by one; The output signal of the conditioning module outputs a pulse detection signal and a control signal for controlling the three-way pressurizing device.

In one embodiment, each path of the pressurizing device of the pulse detection system includes a motor driven part and a motor sequentially connected in the casing of the pressurized device, and the other end of the motor driven part is connected to a The non-inductive end of the pulse sensor is connected; when the motor is working, the pulse sensor is linked with the driven part and moves linearly along the longitudinal direction of the pressurizing device shell.

In one embodiment, the motor driven part includes a threaded connecting rod, a moving guide rail, and the sensor mount; the sensor mount, the moving guide rail, the threaded connecting rod and the motor are sequentially connected in the housing; the sensor The other end of the mounting base is connected with the corresponding one pulse condition sensor; the outer surface of the moving guide rail faces two guide grooves extending along the longitudinal direction of the moving guide rail, and two fixing screws extend through the shell into the corresponding said In the guide groove; when the motor is working, the two fixing screws slide linearly in the guide groove along the guide groove.

In one embodiment, the pulse condition collection device further includes a bracket, and the various pressure devices are respectively fixed on the bracket, and the distance and position between the various pressure devices are adjustable.

In one embodiment, a wrist guard is also provided on the bracket, the wrist guard is located on the same side of the bracket as the pulse condition sensor, and the wrist guard is in the same direction as the sensing end of the pulse condition sensor.

In one embodiment, the analog signal conditioning module includes three pulse signal conditioning circuits; each pulse signal conditioning circuit receives the analog signal output by the corresponding pulse sensor, the primary differential amplifies the analog signal, and then the primary differential Extract the DC component from the amplified result, then perform secondary differential amplification according to the result of the primary differential amplification and the DC component, and finally perform voltage adjustment on the result of the secondary differential amplification and the DC component, and output the conditioning of the analog signal signal and the first DC signal to the processor.

In one embodiment, each pulse signal conditioning circuit includes a first-stage amplifier, a 1:1 inverting amplifier, a fast integrator, a slow integrator, a second-stage amplifier, a voltage-stabilizing reference module, and an adder, wherein the The first-stage amplifier is electrically connected to the corresponding pulse sensor, the reverse amplifier, the fast integrator, the slow integrator, and the voltage-stabilizing reference module; the first-stage amplifier receives the analog signal and the voltage-stabilizing reference The preset DC signal output by the module outputs the first amplified signal to the 1:1 inverting amplifier, the fast integrator and the slow integrator; the inverting amplifier and the first stage amplifier and the second stage amplifier The positive input end is electrically connected to receive the first amplified signal, and output the second amplified signal to the positive input end of the second-stage amplifier; the fast integrator is connected to the first-stage amplifier and the reverse of the second-stage amplifier electrically connected to the input terminal, receiving the first amplified signal, and outputting a second direct current signal to the reverse input terminal of the second-stage amplifier; the slow integrator is electrically connected with the first-stage amplifier and the adder, receiving the first amplified signal, outputting a third direct current signal to the adder; the stabilized voltage reference module is electrically connected with the first stage amplifier, the second stage amplifier and the adder, and outputting the preset direct current signal to the adder The first-stage amplifier, the second-stage amplifier, and the adder; the second-stage amplifier receives the second amplified signal, the second DC signal, and the preset DC signal, and outputs the conditioning signal to the processor; the addition The controller receives the third DC signal and the preset DC signal, and outputs the first DC signal to the processor.

In one embodiment, the processor includes an AD conversion module, a preprocessing module and a data transmission port; the AD conversion module receives the output signal of the analog signal conditioning module and performs AD conversion on the output signal, and the preprocessing module performs AD conversion on the AD The converted digital signal is preprocessed, and the data transmission port transmits the preprocessed data.

In one embodiment, the pulse detection system further includes a pressurizing device drive controller; the pressurizing device drive controller is electrically connected to the pulse acquisition device and the processor respectively; the processor is driven and controlled by the pressurizing device The controller controls each of the three pressure devices separately.

In one embodiment, the pulse condition detection system further includes a data transmission module, which is bidirectionally connected to the processor.

In one embodiment, the pulse detection system further includes a human-computer interaction module, which is connected to the processor in bidirectional communication.

In one embodiment, the human-computer interaction module includes a keyboard input unit, a liquid crystal display module, and an ambient temperature measurement, and the processor communicates with the output interface of the keyboard input unit, the input interface of the liquid crystal display module, and the output interface of the ambient temperature measurement module, respectively. connect.

In one embodiment, the pulse condition detection system further includes a power supply module, and the power supply module is electrically connected to the pulse condition acquisition device, the analog signal conditioning module and the processor respectively.

In one embodiment, the power supply module includes a power conversion module and a multi-channel analog switch, wherein the power conversion module includes an LDO linear voltage regulator, a DCDC converter, and a voltage regulator.

In one embodiment, the pulse condition sensor is a PVDF piezoresistive pulse condition sensor.

The beneficial effect of the present invention is that: the pulse condition acquisition device of the pulse condition detection system disclosed in the present invention includes three pulse condition sensors, which can correspond to the three parts of the wrist of the human body, which are Cun, Guan and Chi. The pulse acquisition device includes three pressure devices, each pressure device corresponds to one pulse sensor, and each pulse sensor can be controlled separately, so that the pulse pressure at the three positions of inch, guan, and chi can be adjusted separately, which is conducive to improving the control of the pulse. The accuracy of pulse information collection and the convenience of use.

In some embodiments of the present invention, the pulse signal conditioning circuit includes three pulse signal conditioning circuits, which can simultaneously process three pulse signal analog signals; each pulse signal conditioning circuit is further provided with a fast integrator and a slow integrator, ensuring conditioning Under the premise of accurate signal, the speed of conditioning is further improved, which is helpful for the pulse detection system to realize real-time detection.

In addition, in some embodiments of the present invention, the pulse sensor is a solid piezoresistive sensor made of PVDF material. Since the PVDF solid piezoresistive sensor has the advantages of small size, convenient integration, and high sensitivity, its detection method and characteristics are similar to those of traditional Chinese medicine finger The technical characteristics of Qiemai are more similar, and the displayed and recorded maps are easier for TCM to understand and accept, which improves the convenience and operability of the pulse detection system.

In the embodiment of the present invention, the pulse detection system includes a data transmission module, which broadens the data transmission mode to wireless transmission, wired transmission or copy transmission through storage media.

The pulse detection system in the embodiment of the present invention provides a good human-computer interaction interface. The user can select the specific functions and measurement parameters of the system through the keyboard input unit, and display the relevant status and pulse information of the system through the liquid crystal display module.

Description of drawings

Hereinafter, embodiments of the present invention will be described in detail in conjunction with the accompanying drawings, wherein;

Fig. 1 is the structural representation of pulse condition detection system disclosed in the present invention in an embodiment;

Fig. 2 is a schematic structural view of an embodiment of the pulse condition acquisition device disclosed in the present invention;

Fig. 3 is a schematic cross-sectional structure diagram of a pressurizing device disclosed in the present invention in an embodiment;

4 is a schematic structural diagram of an analog signal conditioning module disclosed in the present invention in an embodiment;

Fig. 5 is a schematic diagram of detection and control of pulse cutting pressure in an embodiment of the pulse detection system disclosed in the present invention;

FIG. 6 is a schematic structural diagram of a processor disclosed in the present invention in an embodiment;

FIG. 7 is a schematic diagram of the data transmission architecture disclosed by the present invention;

Fig. 8 is a schematic diagram of the connection between the processor and the human-computer interaction module in an embodiment;

FIG. 9 is a schematic structural diagram of a power supply module in an embodiment.

Detailed ways

In order to make the object, technical solution and advantages of the present invention clearer, a pulse detection device and a method of using the detection device of the present invention will be further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described here are only used to explain the present invention, not to limit the present invention.

In order to achieve the above object, the present invention provides a pulse condition detection device, which includes a pulse condition acquisition device, an analog signal conditioning module, and a processor.

In some technical solutions, the pulse condition collection device includes a first pulse condition sensor, a second pulse condition sensor, a third pulse condition sensor, a first pressure mechanical device, a second pressure mechanical device, a third pressurized mechanism. In some specific embodiments, the pulse acquisition device further includes a bracket.

In some technical solutions, the pulse condition sensor is a PVDF piezoresistive pulse condition sensor.

In some technical schemes, the pressurization mechanical device includes a housing, a DC deceleration micromotor and a longitudinal connection part; the non-inductive end of the pulse sensor and the torque output shaft of the micro DC deceleration motor pass through the The longitudinal connecting parts are connected. In some embodiments, the micro DC geared motor is fixedly installed on the inner bottom surface of the housing, and the outer wall of the housing is fixedly installed on the inner wall of the bracket.

In some technical schemes, the analog signal conditioning module includes a first pulse signal conditioning circuit, a second pulse signal conditioning circuit and a third pulse signal conditioning circuit, respectively conditioning the first pulse sensor, the second pulse signal sensor and the output signal of the third pulse sensor. The three signal output ends of the first road pulse condition sensor, the second road pulse condition sensor and the third road pulse condition sensor are respectively connected to the three input ends of the three-way pulse condition signal conditioning circuit, and the six output terminals of the three-way pulse condition signal conditioning circuit are respectively connected to The six analog signal input terminals of the analog-to-digital conversion module of the processor. The motor control port of the control circuit of the processor is connected to the control signal input end of the pressurization device drive controller, and the drive signal output end of the pressurization device drive controller is connected to the DC deceleration micromotor. power input.

In some technical solutions, the data transmission module may adopt a wireless transmission method, a wired transmission method, a storage medium copy method, or any combination of the above three methods. The data output port of the processor is connected to the data input port of the data transmission module.

In some technical solutions, the human-computer interaction module includes a keyboard input unit, a liquid crystal display module and an ambient temperature measurement module. The input end of the human-computer interaction port of the processor is connected to the output end of the keyboard input unit and the output end of the ambient temperature measurement module, and the output end of the human-computer interaction port of the processor is connected to the liquid crystal Displays the input terminals of the block.

In some technical solutions, the power supply module includes a power supply module, a power conversion module and a power management module. The output end of described power supply module is respectively connected with the power input end of described pulse condition acquisition device, the power input end of pressurization device drive controller, the power input end of analog signal conditioning module, the power input end of processor, the data The power input end of the transmission module and the power input end of the human-computer interaction module.

The three PVDF piezoresistive pulse sensors correspond to the three parts of the human body's wrist, namely Cun, Guan, and Chi. When detecting the pulse, the output signal of the pulse sensor is input to the analog signal conditioning module for signal conditioning, and a pulse condition simulation suitable for analog-to-digital conversion is obtained. At the same time, the DC component is extracted from the analog signal to obtain real-time pulse cutting pressure information. The pulse signal of each channel is sent to the digital-to-analog conversion module of the processor. The processor controls the digital-to-analog conversion module to sample the pulse signal, converts the analog signal into a digital signal, and performs digital filtering and compression on the digital signal. , and then store the results locally or in real time through the data transmission module to the server for storage, and display the detected pulse information on the screen through data fusion processing at the server. Each channel of real-time pulse-cutting pressure information is sent to the processor, and the processor controls the rotation of the DC motor according to the pulse-cutting pressure information. The rotation of the DC motor will drive the pulse sensor to move up and down through the motor shaft and the longitudinal connection parts, so as to provide all the information needed for pulse detection. The required floating, neutral, sinking and other pulse cutting pressures are provided by the closed-loop control of the processor. The system also provides a good human-computer interaction port. The user can select the specific functions and measurement parameters of the system through the keyboard input unit, and display the relevant status and pulse information of the system through the liquid crystal display system.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Fig. 1 is a schematic structural diagram of a pulse condition detection system in an embodiment, which shows a preferred embodiment of the pulse condition detection system of the present invention. In this embodiment, the pulse condition detection system includes a pulse condition acquisition device 101 , a pressurizing device drive controller 102 , an analog signal conditioning module 103 , a processor 104 , a data transmission module 105 , a human-computer interaction module 106 and a power supply module 107 . The pulse acquisition device 101 is electrically connected with the pressurizing device drive controller 102 and the analog signal conditioning module 103 respectively; the processor 104 is electrically connected with the pressurizing device drive controller 102 and the analog signal conditioning module 103, and is connected with the data transmission module 105 and the man-machine The interaction module 106 is connected in two-way communication; the power supply module 107 is electrically connected with the pulse condition acquisition device 101, the pressurization device drive controller 102, the analog signal conditioning module 103, the processor 104, the data transmission module 105 and the human-computer interaction module 106 respectively. The function of the data transmission module 105 is to provide a more convenient transmission method for the user to obtain the pulse condition detection result, and the function of the human-computer interaction module 106 is to provide a more friendly human-computer interaction interface to facilitate the user's operation. In some embodiments, the pulse detection system does not include the data transmission module 105 and the human-computer interaction module 106 . In some embodiments, the processor 104 directly drives the action of the three-way pressurizing device 1012, thereby saving the setting of the pressurizing device driving controller 102, and further reducing the volume of the pulse detection system.

In the embodiment shown in FIG. 1 , the pulse condition collection device 101 includes three pulse condition sensors 1011 , that is, a first pulse condition sensor, a second pulse condition sensor, and a third pulse condition sensor. Wherein the pulse condition sensor 1011 is a PVDF piezoresistive pulse condition sensor. The pulse collection device 101 also includes three pressurizing devices 1012, namely a first pressurizing device, a second pressurizing device and a third pressurizing device. Wherein the pressing device 1012 is a mechanical pressing device. The pulse condition sensor 1011 is connected one-to-one with the pressurizing device 1012 . Analog signal conditioning module 103 comprises three-way pulse condition signal conditioning circuit 1031, namely the first path pulse condition signal conditioning circuit, the second path pulse condition signal conditioning circuit and the third path pulse condition signal conditioning circuit, described three-way pulse condition signal conditioning circuit and pulse condition acquisition The three pulse condition sensors 1011 of the device 101 are electrically connected one to one to receive the pulse condition analog signals output by the pulse condition sensors. Each pulse signal conditioning circuit 1031 of the analog signal conditioning module 103 outputs one AC signal and one DC signal to the processor 104 . The processor 104 receives 3 channels of AC signals and 3 channels of DC signals, and outputs control signals to the pressurizing device drive controller 102, and the pressurizing device drive controller 102 outputs three channels of pressurizing device driving signals to respectively control the three channels of the pulse condition acquisition device. Each way of pressurization device. The specific structures of the pulse acquisition device 101 , the analog signal conditioning module 103 , the processor 104 , the data transmission module 105 , the human-computer interaction module 106 and the power supply module 107 will be described in detail below.

Fig. 2 is a schematic structural diagram of the pulse condition collection device 101 in an embodiment, which shows a preferred implementation of the pulse condition collection device 101 of the present invention. The function of the pulse condition collecting device 101 is to collect the pulse condition data of the human body under different pressures of the pulse condition. As shown in FIG. 2 , the pulse condition acquisition device 101 includes a three-way pulse condition sensor 1011 , a bracket 202 , a three-way pressurizing device 1012 , a screw 204 and a wrist guard 205 . Wherein, the function of the bracket 202 and the screw 204 is to fix the pressurizing device to facilitate pulse condition measurement; the function of the wrist guard 205 is to facilitate the collection of pulse condition analog signals by the pulse condition sensor. In other embodiments, the pulse condition collection device 10 may only include three pulse condition sensors 1011 and three pressure devices 1012 .

In the embodiment shown in FIG. 2 , the three-way pressurizing device 1012 is fixed on the bracket 202 by screws 204 , and the distance and position of the three-way pressurizing device 1012 can be adjusted manually, so as to adapt to different types of pulse positions of different people. The non-inductive ends of the three-way pulse condition sensor 1011 are respectively fixed on one end of the three-way pressurizing device 1012 , the pulse condition sensor 1011 is located at one side of the support, and the other end of the pressurizing device 1012 is located at the other side of the support 202 . The wristband 205 is fixed on the support 202 , on the same side as the pulse condition sensor 1011 and in the same direction as the sensing end of the pulse condition sensor 1011 . The induction end of pulse condition sensor 1011 will be positioned at the inboard of wristband 205 like this, and during measurement, wristband 205 helps the induction end of three-way sensor 1011 to be close to the cun, off, chi position of human body wrist, and wristband 205 makes pulse condition collection The device 101 is convenient to be fixed on the wrist of the human body. The three-way pulse condition sensors 1011 respectively collect the pulse condition data of cun, guan and chi. Each of the three-way pressurizing devices 1012 respectively controls the pulse cutting pressure applied by each way of the pulse condition sensors 1011 to collect the pulse condition information.

FIG. 3 is a schematic cross-sectional view of the pressurizing device 1012 in an embodiment, which shows a preferred embodiment of the pressurizing device 1012 of the present invention. The pressurizing device 1012 is mainly composed of a motor, a motor driven part and a casing 307. In the casing 307, the motor driven part is connected to the motor in sequence. The other end of the motor follower is connected with the non-inductive end of the pulse condition sensor 1011 . In this embodiment, the motor is a deceleration DC motor 301 , and the driven parts of the motor include a sensor mount 306 , a spring 305 , a moving rail 304 , a moving rail fixing screw 309 , a threaded connecting rod 303 and a motor output shaft fixing screw 302 . The pressing device 1012 also includes a fixed connection part, and the fixed connection part includes a motor fixing screw 308 . In other embodiments, the motor connection part may not include the spring 305 and the sensor mounting base 306 , and the pulse sensor 1011 may be directly installed on the moving guide rail 304 .

The deceleration DC motor 301 is connected to the rear part of the threaded connecting rod 303 through the motor output shaft fixing screw 302. The front part of the threaded connecting rod 303 is provided with threads, and the moving guide rail 304 is provided with a hollow cavity, and the rear part of the cavity is provided with a screw connection. The screw thread (not shown) that rod 303 is set to match the screw thread (not shown), the threaded connecting rod 303 front section and the moving guide rail 304 are connected by thread, and the front section of the threaded connecting rod 303 can extend into the hollow cavity of the moving guide rail 304 (not shown) . The front end of the moving guide rail 304 is connected with one end of the spring 305 , and the other end of the spring 305 is connected with the sensor mounting seat 306 . After the above devices are connected, they are loaded into the cylindrical device housing 307 , and the decelerating DC motor 301 is fixed in the housing 307 through the motor fixing screws 308 . The present invention is not limited by the connection modes between the deceleration DC motor 301 and the threaded connecting rod 303, and between the threaded connecting rod 303 and the moving guide rail 304 disclosed in this embodiment. The DC motor 301 and the threaded connecting rod 303 , and the threaded connecting rod 303 and the moving guide rail 304 can be connected by other connection methods, such as bolt connection, snap connection and the like.

As shown in Figure 3, the surface of the moving guide rail 304 is oppositely provided with two guide grooves extending along the longitudinal direction of the housing, and two moving guide rail fixing screws 309 respectively extend into the upper and lower guide grooves of the moving guide rail 304 through the housing 307, When the moving guide rail 304 moves along the longitudinal direction of the housing, it can slide linearly along the guide groove. The moving guide rail 304 is not fixedly connected with the casing 307 by the moving guide rail fixing screw 309 , and the function of the moving guide rail fixing screw 309 is to limit the moving direction of the moving guide rail 304 . After the deceleration DC motor 301 is energized, the torque output shaft of the motor rotates, and the threaded connecting rod 303 connected to the decelerating DC motor 301 is thus rotated in conjunction, and the moving guide rail 304 threadedly connected with the threaded connecting rod 303 is limited by the moving guide rail fixing screw 309 Do linear motion along the longitudinal direction of the shell 307, and the moving guide rail 304 drives the pulse sensor 1011 to move through the spring 305 and the sensor mounting seat 306, so that the pulse sensor 1011 makes a linear motion in the longitudinal direction of the shell 307. Using the pressurizing device 1012, the pulse sensor 1011 can be controlled to move forward or backward by controlling the rotation direction of the deceleration DC motor. In other embodiments, the number of the guide slots and the moving guide rail fixing screws 309 may be more than two.

As shown in Figure 1, analog signal conditioning module 103 comprises three-way pulse signal conditioning circuit 1031, and three-way pulse condition signal conditioning circuit 1031 is electrically connected with three-way pulse condition sensor 1011 respectively, receives the three-way analog signal that pulse condition sensor 1011 outputs, three-way The six output ends of the pulse signal conditioning circuit 1031 are respectively connected to the processor 104 . The function of the analog signal conditioning module 103 is to condition the analog signal input by the pulse condition sensor, convert it into an analog pulse signal suitable for processing by the digital-to-analog conversion module, and extract a DC signal representing pulse cutting pressure from the original signal.

Fig. 4 shows a kind of preferred embodiment of the pulse condition signal conditioning circuit of one path in the analog signal conditioning module disclosed by the present invention, each path pulse condition signal conditioning circuit (1031) receives the corresponding pulse condition sensor (1011) output of one path Analog signal, the primary differential amplification of the analog signal, and then extract the DC component from the result of the primary differential amplification, then perform secondary differential amplification according to the result of the primary differential amplification and the DC component, and finally perform the secondary differential amplification on the result of the secondary differential amplification and The DC components are voltage-adjusted respectively, and the conditioning signal of the analog signal and the first DC signal are output to the processor (104).

As mentioned above, in this embodiment, the pulse sensor used is a PVDF piezoresistive pulse sensor, which can be driven by voltage or current to generate a millivolt-level voltage output signal proportional to the input pressure, but at the same time There is a zero drift voltage between -25mV～+25mV. When collecting pulse information, the analog signal output by the pulse sensor can be regarded as a superposition of a DC component and a weak time-varying signal, and the weak time-varying signal is the pulse information to be measured, so it must be amplified. It is also necessary to eliminate the influence of the DC component, so signal conditioning becomes a must. At the same time, the quality of the conditioning directly affects the overall effect.

As can be seen from Fig. 4: after the analog signal conditioning module receives the analog differential signal output by the pulse condition sensor 1011 of the pulse condition acquisition device 101, the analog differential signal is firstly amplified by the first stage amplifier 401, and then the primary amplified The signal is divided into three paths for processing respectively. The first path is input to the positive input terminal of the second stage amplifier 405 through a 1:1 inverting amplifier 402, and the second path is input to the positive input terminal of the second stage amplifier 405 through a fast integrator 403. At the inverting input terminal, the result obtained by integrating the fast integrator 403 is the DC component in the primary amplified signal, so that the signal processed by the inverting amplifier 402 and the fast integrator 403 is differentially amplified by the second stage amplifier 405 , so as to realize the amplification of the analog differential signal of the pulse condition, remove the influence of the DC component, and obtain a better pulse condition waveform. The purpose of using the fast integrator 402 is to improve the response speed of the circuit and obtain a more accurate pulse condition analog signal. The third path extracts the DC component of the pulse signal through a slow integrator 404. The purpose of using the slow integrator here is to accurately extract the DC component in the signal and reduce measurement errors. The stabilized voltage reference module 407 is connected to the first-stage amplifier 401 , the second-stage amplifier 405 and the adder 406 respectively. The purpose of the electrical connection between the voltage stabilizing reference module 407 and the first-stage amplifier 401 is to remove the zero-drift effect of the PVDF piezoresistive pulse sensor, so that the result of the original pulse signal after differential amplification is within a suitable range for future signal processing . The purpose of the electrical connection between the voltage stabilizing reference module 407 and the second-stage amplifier 405 is to superimpose a known DC component on the analog differential signal of the pulse image after DC removal, so as to ensure that the processed signal is within the voltage range collected by the back-end AD . The purpose of the voltage stabilization reference module 407 being electrically connected to the adder 406 is to make the DC signal extracted from the original signal within the voltage range collected by the back-end AD.

Fig. 5 is a schematic diagram of the pulse detection system detecting and controlling the pulse pressure of the pulse sensor 1011 and controlling the pulse pressure of the pulse sensor 1011 in an embodiment. As shown in Figure 5, the detection step of pulse cutting pressure comprises pulse condition sensor 101 and gathers pulse condition analog signal; Output pulse condition analog signal to analog signal conditioning module 103; Analog signal conditioning module 103 extracts the DC information of pulse condition analog signal, outputs DC signal to processing The processor 104; the processor 104 performs data processing such as AD conversion, digital filtering, and data compression on the DC signal, and the digital DC signal obtained after data processing is the pulse pulse pressure signal representing the pulse pulse pressure to be detected. The pulse cutting pressure is controlled by driving the controller 102 of the pressurizing device, and controlling the rotation direction of the motor in the pressurizing device 1012 according to the digital DC signal output after data processing by the processor 104, thereby controlling the movement direction of the sensor. As described above, the pulse condition sensor 1011 moves linearly in the longitudinal direction of the casing 307 of the pressurizing device 1012 . If the pulse condition sensor 1011 moves away from the pressurizing device 1012 , the applied pulse cutting pressure is greater, and if the pulse condition sensor 1011 moves along the shell 307 toward the pressurizing device 1012 , the applied pulse cutting pressure is smaller. The whole system forms a closed-loop control, which can realize the automatic control function of pulse cutting pressure. The processor 1044 can control the rotation direction of the DC geared motor of the pressurizing device 1012 through the drive controller 102 of the pressurizing device, and indirectly controls the moving direction of the pulse condition sensor, thereby providing a constant measurement pressure for the measurement of the pulse condition information, In this way, by changing the value of the constant pressure, three different collection methods of floating, middle and sinking in pulse condition measurement can be realized. With a certain software algorithm, the measurement can achieve a certain measurement pressure and keep it constant during the measurement process, making the measurement more convenient. Since the pulse acquisition device 101 is driven by the motor torque output shaft and the pulse sensor 1011 moves to control the pulse cutting pressure, the control of the pulse cutting pressure is precise and convenient for the user to control.

FIG. 6 is a schematic structural diagram of a processor in an embodiment. The processor 104 needs to perform a series of data processing on the signal conditioned by the analog signal conditioning module 103, as shown in Figure 6, in this embodiment, the processor 104 mainly includes an AD conversion module 601, a preprocessing module 605 and a The transmission port 604, wherein the preprocessing module 605 includes a digital filtering module 602 and a data compression module 603.

In one embodiment of the present invention, the processor 104 is realized by a microprogram controller (MCU, Microprogrammed Control Unit), and the microprogram controller is to convert CPU, RAM, ROM, timer, multiple I/O interfaces and AD Modules are integrated on a chip to form a chip-level computer.

The AD conversion is realized through the AD conversion module 601 inside the MCU. In a certain embodiment, there is a 10-bit successively comparing AD conversion module inside the microcontroller. Through the analysis of the pulse information, we know that the AD conversion module inside the microcontroller can meet the requirements of the system data acquisition.

Digital filtering and digital compression are mainly realized through the digital filtering module 602 and the data compression module 603 . The digital filtering module 602 performs preliminary processing on the AD-converted data to eliminate the influence of obvious errors, wherein the preliminary processing to be completed includes smoothing filtering (removing the floating average window) and the like.

The main purpose of data compression is to reduce the bandwidth occupied by back-end data transmission by compressing the volume of data. In this embodiment, the data compression algorithm is selected to realize the lossless compression of the pulse data. However, those skilled in the art should understand that other data compression algorithms can also be applied to the present invention.

The data transmission port 604 includes a motor control port, a data output port, and a human-computer interaction port, wherein the motor control port is connected to the control signal input end of the pressurizing device drive controller 102, and the data output port is connected to the data output port. The data input end of the transmission module 105, the input end of the human-computer interaction port are connected to the output end of the keyboard input unit of the human-computer interaction module 106 and the output end of the ambient temperature measurement module, and the output end of the human-computer interaction port of the processor Connect to the input terminal of the liquid crystal display module of the human-computer interaction module 106 .

In the above, as a best implementation, the data processing of analog signals includes multi-directional data processing including AD conversion, digital filtering and data compression, but in other implementations, according to actual needs, AD can be omitted. One or two treatments other than conversion.

As shown in Figure 1, the data transmission module 105 is connected with the processor 104 for two-way communication, and is used to realize the transmission of data. In this example, the data transmission module 105 is a wireless transmission module. for data transfer. The wireless transmission part includes various functions such as radio frequency transmission, reception, PLL synthesis, FSK modulation and demodulation, and programmable control.

Fig. 7 is a schematic diagram of data transmission architecture, as can be seen from the figure, by means of wireless transmission, pulse condition information collection terminal 701 of the present invention can upload pulse condition data to server 703 end through pulse condition information collection gateway 702, and user's pulse condition information and user information are stored in the database 704, and the client 705 can access the user's pulse diagnosis information through the Internet network connection database. This embodiment realizes data storage and sharing, and can also carry out deep mining of data on the server side.

In this embodiment, the wireless transmission method is used as the best implementation method, and the traditional wired transmission method or the copying method through a storage medium may also be used, or any combination of the above-mentioned multiple methods may be used.

Fig. 8 is a schematic diagram of the connection between the processor and the human-computer interaction module in an embodiment. The function of the human-computer interaction module 106 is to facilitate the user to operate the pulse collection terminal. As shown in Figure 8, the human-computer interaction module 106 includes a keyboard input unit 803, a liquid crystal display module 804, and an ambient temperature measurement module 805, and the processor 104 is respectively connected to the output interface of the keyboard input unit 803 and the liquid crystal display module The input interface of 804 and the output interface of the ambient temperature measurement module 805 are communicatively connected.

The keyboard input unit 803 helps the user select specific functions of the system and input specific parameters, which is convenient for the user to set related settings. The system will display the relevant state of the module 804, the real-time data of the pulse condition and the pulse condition waveform through the liquid crystal display. The ambient temperature measurement module 805 can be realized by related sensors, which can collect the temperature and humidity of the environment where the system is located, and inform the user through the human-computer interaction module 106, so that the user can have a better understanding of the environment.

In order to reduce the power consumption of the system as much as possible, the power supply module 107 realizes the control and management of each module of the whole system. Fig. 9 is a structural principle diagram of the power supply module 107 in one embodiment, as can be seen from Fig. 9 the power supply module 107 controls and manages the power supplies of the following several functional modules, which are respectively the processor 104, keyboard input Unit 803 , liquid crystal display module 804 , pressurizing device drive controller 102 , data transmission module 105 , operational amplifier 904 , and pulse sensor 101 . Since each functional module of the system needs different power types, the system performs corresponding conversion processing on the incoming power. The power supply module 107 includes a power conversion module 901 and a multi-channel analog switch 909 . The power conversion module 901 includes an LDO linear voltage regulator 9011 , a DCDC converter 9012 and a voltage regulator 9013 . It is then connected to the power input terminals of each functional module of the system through a multi-channel analog switch 909 . Among them, the LDO linear voltage regulator 9011 stabilizes the +5V power supply connected to the system to +3.3V, and provides power for the processor 104, the liquid crystal display module 804, the pressurizing device drive controller 102 and the data transmission module 105; DCDC conversion The device 902 converts the +5V power supply connected to the system into a ±5V power supply to provide power for the operational amplifier 904; the stabilized power supply 903 stabilizes the power supply voltage to +3.3V to provide power for the pulse sensor 101. The multi-channel analog switch 909 used in the power supply module 107 can control the power supply of each module of the system. When the system is working, the power supply of the relevant modules can be turned on or off through the multi-channel analog switch 909 as required to reduce system power consumption. the goal of.

The beneficial effects of the present invention are:

The pulse condition acquisition device of the pulse condition detection system disclosed in the present invention includes three-way pulse condition sensors, which can correspond to the three parts of the wrist of the human body, which are Cun, Guan and Chi. The pulse acquisition device includes three pressure devices, each pressure device corresponds to one pulse sensor, and each pulse sensor can be controlled separately, so that the pulse pressure at the three positions of inch, guan, and chi can be adjusted separately, which is conducive to improving the control of the pulse. The accuracy of pulse information collection and the convenience of use.

Some embodiments of the present invention include a three-way pulse signal conditioning circuit, which can process three pulse signal analog signals at the same time; each pulse signal conditioning circuit is further provided with a fast integrator and a slow integrator to ensure that the conditioning signal is accurate. The speed of conditioning is further improved, which helps the pulse condition detection system to realize real-time detection.

In addition, in some embodiments of the present invention, solid piezoresistive sensors made of PVDF materials are used. Since PVDF solid piezoresistive sensors have the advantages of small size, convenient integration, and high sensitivity, their detection methods and characteristics are similar to those of TCM finger pulse cutting. The technical characteristics are more similar, which shows that the recorded atlas is easier for Chinese medicine to understand and accept, and it also improves the convenience and operability of the pulse detection system.

In the embodiment of the present invention, the pulse detection system includes a data transmission module, which broadens the data transmission mode to wireless transmission, wired transmission or copy transmission through storage media.

The pulse detection system in the embodiment of the present invention provides a good human-computer interaction port, the user can select the specific functions and measurement parameters of the system through the keyboard input unit, and display the relevant status and pulse information of the system through the liquid crystal display module.

Other aspects and features of the present invention will be apparent to those skilled in the art by describing specific embodiments of the present invention in conjunction with the accompanying drawings.

The specific embodiments of the present invention have been described and illustrated above, and these embodiments should be considered as exemplary only, and are not used to limit the present invention, and the present invention should be interpreted according to the appended claims.

Claims (13)

1. A pulse condition detection system, comprising a pulse condition acquisition device (101) for outputting pulse condition analog signals, an analog signal conditioning module (103) and a processor (104) for conditioning the pulse condition analog signals; the analog signal conditioning module (103) are respectively electrically connected to the pulse acquisition device (101) and the processor (104); characterized in that, The pulse acquisition device (101) includes three pulse condition sensors (1011) and three pressure devices (1012); the pressure devices (1012) are connected to the pulse condition sensors (1011) in one-to-one correspondence; the processor ( 104) Outputting a pulse detection signal and a control signal for controlling the three-way pressurizing device (1012) according to the output signal of the analog signal conditioning module (103); Wherein, the analog signal conditioning module (103) includes three pulse signal conditioning circuits (1031); each pulse signal conditioning circuit (1031) receives the analog signal output by the corresponding pulse sensor (1011), and the primary differential amplifies The analog signal, then extracts the DC component from the result of the primary differential amplification, then performs secondary differential amplification according to the result of the primary differential amplification and the DC component, and finally performs voltage on the result of the secondary differential amplification and the DC component respectively adjusting, outputting the conditioning signal of the analog signal and the first DC signal to the processor (104); Wherein, each pulse signal conditioning circuit (1031) includes a first-stage amplifier, a 1:1 inverse amplifier, a fast integrator, a slow integrator, a second-stage amplifier, a voltage-stabilizing reference module, and an adder, wherein the first stage The first-stage amplifier is electrically connected to the corresponding pulse sensor (1011), the inverting amplifier, the fast integrator, the slow integrator and the stabilized voltage reference module; the first-stage amplifier receives the analog signal and the stabilized voltage reference module; Voltage the preset DC signal output by the reference module, and output the first amplified signal to the 1:1 inverting amplifier, the fast integrator and the slow integrator; The inverting amplifier is electrically connected to the positive input end of the first stage amplifier and the second stage amplifier, receives the first amplified signal, and outputs a second amplified signal to the positive input end of the second stage amplifier; The fast integrator is electrically connected to the first-stage amplifier and the inverting input end of the second-stage amplifier, receives the first amplified signal, and outputs a second DC signal to the inverting input end of the second-stage amplifier; The slow integrator is electrically connected to the first-stage amplifier and the adder, receives the first amplified signal, and outputs a third DC signal to the adder; The voltage-stabilizing reference module is electrically connected to the first-stage amplifier, the second-stage amplifier, and the adder, and outputs the preset DC signal to the first-stage amplifier, the second-stage amplifier, and the adder; The second stage amplifier receives the second amplified signal, the second DC signal and the preset DC signal, and outputs the conditioning signal to the processor (104); The adder receives the third direct current signal and the preset direct current signal, and outputs the first direct current signal to the processor (104). 2. The pulse detection system according to claim 1, characterized in that, each path of the pressurizing device (1012) includes a motor follower and a motor sequentially connected in the casing of the pressurizing device, and the motor is driven from The other end of the moving part is connected to a non-inductive end of the pulse sensor (1011); when the motor is working, the pulse sensor (1011) is linked with the driven part to make a straight line along the longitudinal direction of the casing of the pressurizing device. sports. 3. pulse detection system according to claim 2, is characterized in that, this motor driven part comprises threaded connecting rod, moving guide rail, sensor mount; This sensor mount, this moving guide rail, this threaded connecting rod and this motor connected sequentially in the housing; the other end of the sensor mount is connected to the corresponding pulse sensor (1011); the outer surface of the moving guide rail is provided with two guide grooves extending along the longitudinal direction of the moving guide rail, two Two fixing screws extend through the shell into the corresponding guide groove; when the motor is working, the two fixing screws slide linearly along the guide groove along the guide groove. 4. The pulse condition detection system according to claim 2, characterized in that, the pulse condition acquisition device (101) further comprises a bracket, and each of the pressurizing devices (1012) is respectively fixed on the bracket, and each of the pressurizing devices The distance between (1012) and the position are adjustable. 5. The pulse condition detection system according to claim 4, wherein a wrist guard is also arranged on the support, the wrist guard and the pulse condition sensor are located on the same side of the support, and the wrist guard and the sensing end of the pulse condition sensor In the same direction. 6. The pulse detection system according to claim 1, characterized in that, the processor (104) includes an AD conversion module, a preprocessing module and a data transmission port; the AD conversion module receives the analog signal conditioning module (103) Outputting a signal and performing AD conversion on the output signal, the preprocessing module performs preprocessing on the digital signal obtained after the AD conversion, and the data transmission port transmits the preprocessed data. 7. The pulse condition detection system according to claim 1, characterized in that, the pulse condition detection system further comprises a pressurizing device drive controller (102); the pressurizing device drive controller (102) is respectively connected with the pulse condition acquisition device ( 101), the processor (104) is electrically connected; the processor (104) separately controls each of the three pressure devices (1012) through the pressure device drive controller (102). 8 . The pulse condition detection system according to claim 1 , characterized in that the pulse condition detection system further comprises a data transmission module ( 105 ), and the data transmission module ( 105 ) is connected to the processor ( 104 ) in two-way communication. 9. The pulse condition detection system according to claim 1, characterized in that the pulse condition detection system further comprises a human-computer interaction module (106), and the human-computer interaction module (106) is connected to the processor (104) in two-way communication. 10. The pulse detection system according to claim 9, characterized in that, the human-computer interaction module (106) includes a keyboard input unit, a liquid crystal display module, and ambient temperature measurement, and the processor (104) communicates with the output of the keyboard input unit respectively. The interface, the input interface of the liquid crystal display module, and the output interface of the ambient temperature measurement module are connected by communication. 11. The pulse condition detection system according to claim 1, characterized in that, the pulse condition detection system further comprises a power supply module (107), and the power supply module (107) is respectively connected to the pulse condition acquisition device (101), the analog signal The conditioning module (103) and the processor (104) are electrically connected. 12. The pulse detection system according to claim 11, characterized in that the power supply module (107) includes a power conversion module and a multi-channel analog switch, wherein the power conversion module includes an LDO linear voltage regulator and a DCDC converter. 13. The pulse condition detection system according to claim 1, characterized in that the pulse condition sensor (1011) is a PVDF piezoresistive pulse condition sensor.

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