CN109745024B - Blood detection system - Google Patents
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- CN109745024B CN109745024B CN201910047435.4A CN201910047435A CN109745024B CN 109745024 B CN109745024 B CN 109745024B CN 201910047435 A CN201910047435 A CN 201910047435A CN 109745024 B CN109745024 B CN 109745024B
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Abstract
A blood testing system comprising: the device comprises a sleeve, a pump inflation module, a valve deflation module, a pressure sensing module, a signal amplification module, a signal filtering module, an analog-to-digital conversion module, a central processing module, a storage module, a display module and a prompt module. The oversleeve is wound and fixed on the arm of the user and is connected with the pump inflation module and the valve deflation module; the pump inflation module and the valve deflation module realize inflation and deflation; the resistance value of the pressure sensing module changes along with the change of the sensed pressure, and the resistance change is changed into a voltage signal; the signal amplification module and the signal filtering module amplify and filter the voltage signals, the amplified and filtered results are converted into digital signals through the analog-to-digital conversion module, data processing is carried out through the central processing module, and the results are stored, displayed and abnormally prompted. The portable blood pressure monitor can be conveniently carried, a specific circuit is adopted to carry out high-precision acquisition on blood pressure signals, the signals are processed with higher precision, and finally the health condition of a tested person is reminded or informed through display or prompt.
Description
Technical Field
The present invention relates to the field of human physiological parameter detection, and more particularly, to a blood detection system.
Background
Methods and devices for detecting blood, in particular blood pressure, exist in the prior art. Including invasive and non-invasive detection. The former technique and method, which inserts a pressure sensor into an artery or heart to detect a blood pressure signal, although the most accurate results are obtained, has low operability and popularity, and has high technical requirements for operation, and is only suitable for surgical use in practical procedures. The latter common mode is a blood pressure continuous measurement mode mainly based on auscultation, and more generally, the use of a portable digital blood pressure detector is adopted; although the measured result is a value at a certain moment, the changing process and fluctuation cannot be continuously reflected, but the method has high popularity because of non-invasiveness. In the non-invasive measurement, in order to compensate the accuracy of the detection result, a pressure sensor with high acquisition precision is required to be used, and in the signal propagation and processing path, precise amplification and denoising are required, and the signal is subjected to digital transformation. However, in order to make the measurement product portable, integration and simplification of the circuit structure are required, that is, a better signal processing effect needs to be achieved with a smaller cost and structure. Under the background, a non-invasive blood pressure detection system is designed, a specific circuit can be adopted to carry out high-precision acquisition on a blood pressure signal, the signal is processed with higher precision, and finally the health condition of a tested person is reminded or informed through display or prompt.
Disclosure of Invention
One of the objectives of the present invention is to provide a blood test system, which can be carried conveniently, and can use a specific circuit to perform high-precision acquisition of blood pressure signals, process the signals with high precision, and finally remind or inform the health status of the person to be tested through display or prompt.
The present invention adopts a technical solution to solve the above technical problems, and provides a blood test system, including: the device comprises a sleeve, a pump inflation module, a valve deflation module, a pressure sensing module, a signal amplification module, a signal filtering module, an analog-to-digital conversion module, a central processing module, a storage module, a display module and a prompt module. Wherein: the oversleeve is used for winding and fixing on the arm of the user and is connected with the pump inflation module and the valve deflation module; the pump inflation module and the valve deflation module are used for realizing inflation and deflation; the pressure sensing module adopts a bridge structure, the resistance value changes along with the change of the sensed pressure, and the resistance change is changed into a voltage signal; the signal amplification module and the signal filtering module are used for amplifying and filtering the voltage signal, forming a digitized signal by an analog-to-digital conversion module according to the amplified and filtered result, processing data by the central processing module, storing the data processing result in the storage module and displaying the data processing result on the display module; when the central processing module judges that the blood pressure data is abnormal, the prompting module prompts a user.
In one embodiment, the signal amplification module comprises: the signal amplification module takes a voltage signal VIN formed by resistance change as input and inputs the voltage signal VIN to the base electrode of the transistor Q1, and the emitter electrode of the transistor Q1 is connected with one end of the current source C1 and the collector electrode of the transistor Q4; the other end of the current source C1 is connected to one end of the current source C2, the collector of the transistor Q6 and the high supply voltage VDD; the collector of the transistor Q1 is connected with the anode of the diode D1 and the base of the transistor Q2; the collector of the transistor Q2 is connected with one end of the capacitor C1 and the base of the transistor Q3; the collector of the transistor Q3 is connected with the other end of the capacitor C1, the cathode of the diode D3, the base of the transistor Q7 and the collector of the transistor Q5; the base of the transistor Q4 is connected with the output VOUT of the signal amplification module, the emitter of the transistor Q6 and the collector of the transistor Q7; the emitter of the transistor Q4 is connected with the base of the transistor Q5; the other end of the current source C2 is connected with the base of the transistor Q6 and the anode of the diode D2; the cathode of the diode D2 is connected with the anode of the diode D3; the cathode of the diode D1, the emitter of the transistor Q2, the emitter of the transistor Q3, the emitter of the transistor Q5, and the emitter of the transistor Q7 are connected to the low power supply voltage VEE.
In one embodiment, the signal amplification module takes the voltage signal VIN + formed by the resistance change as its positive input and inputs the voltage signal VIN + to the base of the transistor Q1, and the signal amplification module takes the voltage signal VIN + output by the voltage transformation module as its positive input and inputs the voltage signal VIN + to the base of the transistor Q1; the signal amplification module takes the voltage signal VIN output by the voltage transformation module as the negative input of the voltage amplification module and inputs the voltage signal VIN to the base electrode of the transistor Q8; the emitter of the transistor Q1 is connected with one end of the current source C1, the emitter of the transistor Q8 and the collector of the transistor Q4; the other end of the current source C1 is connected to one end of the current source C2, the collector of the transistor Q6 and the high supply voltage VDD; the collector of the transistor Q1 is connected with the anode of the diode D1 and the base of the transistor Q2; the collector of the transistor Q2 is connected with one end of the capacitor C1, the collector of the transistor Q8 and the base of the transistor Q3; the collector of the transistor Q3 is connected with the other end of the capacitor C1, the cathode of the diode D3, the base of the transistor Q7 and the collector of the transistor Q5; the base of the transistor Q4 is connected with the output VOUT of the signal amplification module, the emitter of the transistor Q6 and the collector of the transistor Q7; the emitter of the transistor Q4 is connected with the base of the transistor Q5; the other end of the current source C2 is connected with the base of the transistor Q6 and the anode of the diode D2; the cathode of the diode D2 is connected with the anode of the diode D3; the cathode of the diode D1, the emitter of the transistor Q2, the emitter of the transistor Q3, the emitter of the transistor Q5, and the emitter of the transistor Q7 are connected to the low power supply voltage VEE; the voltage transformation module divides a voltage signal VIN formed by resistance change into two paths for output, wherein one path of signal VIN + is an original signal VIN, and the other path of signal VIN-is a signal with the polarity opposite to that of the original signal VIN.
In one embodiment, current source C1 and current source C2 are wilson current sources.
In one embodiment, the signal filtering module includes: one end of the inductor L11 is connected to an input signal Vi, which is the output VOUT of the signal amplification module; the other end of the inductor L11 is connected to one end of the capacitor C11, one end of the capacitor C12, and one end of the inductor L12; the other end of the capacitor C12 is connected to the other end of the inductor L12 and one end of the capacitor C13; the other end of the capacitor C13 is connected to one end of the resistor R11 and one end of the inductor L13; the other end of the inductor L13 is connected with one end of a capacitor C14; the other end of the resistor R11 is connected to one end of the resistor R12 and one end of the inductor L14; the output end of the resistor R12 is connected with the output Vo of the signal filtering module; the other end of the capacitor C11, the other end of the capacitor C14, and the other end of the inductor L14 are grounded.
In one embodiment, the signal filtering module includes: one end of the inductor L21 is connected to an input signal Vi, which is the output VOUT of the signal amplification block, and one end of the capacitor C21; the other end of the inductor L21 is connected to the other end of the capacitor C21, one end of the capacitor C22, one end of the inductor L22 and one end of the capacitor C23; the other end of the capacitor C22 is connected to one end of the inductor L24, one end of the capacitor C25, one end of the capacitor C24 and one end of the inductor L23; the other end of the inductor L24 is connected with the other end of the capacitor C25 and the output Vo of the signal filtering module; the other end of the inductor L22, the other end of the capacitor C23, the other end of the capacitor C24, and the other end of the inductor L23 are grounded.
In one embodiment, the signal filtering module includes: one end of the capacitor C31 is connected to an input signal Vi, which is an output VOUT of the signal amplification block, and one end of the inductor L31, one end of the resistor R31, one end of the inductor L32, and one end of the capacitor C32; the other end of the resistor R31 is connected to one end of a resistor R32, the other end of an inductor L32, one end of a capacitor C33, and one end of an inductor L33; the other end of the resistor R32 is connected to one end of a resistor R33, the other end of an inductor L33, one end of a capacitor C34, and one end of an inductor L34; the other end of the resistor R33 and the other end of the inductor L34 are connected with the output Vo of the signal filtering module; the other end of the inductor L31, the other end of the capacitor C32, the other end of the capacitor C33, and the other end of the capacitor C34 are grounded.
In one embodiment, in the analog-to-digital conversion module, the filtered signal is input to one end of a comparator, the other end of the comparator is connected to the output of a switch tree, the comparator inputs the comparison result to a SAR, the SAR feeds the result back to the switch tree and sends the result to an output latch buffer, the switch tree is connected to a 256R resistor ladder, and the output latch buffer outputs the signal when enabled.
In one embodiment, after the central processing module performs data processing, the data processing result is stored in the storage module for data recording and for a user to perform longitudinal comparison later; the user can select the relevant historical records at a certain moment recorded in the storage module, and further judge the change range of the blood pressure of the user at a fixed moment or a fixed time period every day, so that the user can conveniently master the health condition of the user and conveniently analyze the reason of the change; the blood detection system also comprises a voice module which is used for carrying out voice broadcast on the data of the central processing module, writing the data with the storage module and inquiring historical data so as to compare the historical data of the user at the same time or in a similar time period, and the user can conveniently receive and master the change condition of the blood pressure of the user.
Drawings
Embodiments of the invention are illustrated by way of example, and not by way of limitation, in the figures of the accompanying drawings and in which like reference numerals refer to similar elements and in which:
FIG. 1 illustrates a schematic diagram of a blood detection system, according to an exemplary embodiment of the present invention.
FIG. 2 illustrates a functional block diagram of a blood testing system, according to an exemplary embodiment of the present invention.
Fig. 3 illustrates a block diagram of a signal amplification module according to an exemplary embodiment of the present invention.
Fig. 4 illustrates a block diagram of an alternative of a signal amplification module, according to an exemplary embodiment of the present invention.
Fig. 5 illustrates a block diagram of a signal filtering module according to an exemplary embodiment of the present invention.
Fig. 6 illustrates a block diagram of an alternative implementation of a signal filtering module, according to an exemplary embodiment of the present invention.
Fig. 7 illustrates a block diagram of another alternative embodiment of a signal filtering module, according to an exemplary embodiment of the present invention.
Fig. 8 illustrates a block diagram of an analog-to-digital conversion module, according to an exemplary embodiment of the present invention.
Detailed Description
Before proceeding with the following detailed description, it may be advantageous to set forth definitions of certain words and phrases used throughout this patent document: the terms "include" and "comprise," as well as derivatives thereof, mean inclusion without limitation; the term "or" is inclusive, meaning and/or; the phrases "associated with," "associated with," and derivatives thereof may mean to include, be included within, with, interconnect with, contain, be included within, be connected to, or be connected with, be coupled to, or be coupled with, be communicable with, cooperate with, interleave, juxtapose, be proximate to, be bound to, or be bound with, have properties of, etc.; while the term "controller" means any device, system or component thereof that controls at least one operation, such a device may be implemented in hardware, firmware or software, or some combination of at least two of the same. It should be noted that: the functionality associated with any particular controller may be centralized or distributed, whether locally or remotely. Definitions for certain words and phrases are provided throughout this patent document, as those skilled in the art will understand: in many, if not most instances, such definitions apply to prior as well as future uses of such defined words and phrases.
In the following description, reference is made to the accompanying drawings that show, by way of illustration, several specific embodiments. It will be understood that: other embodiments are contemplated and may be made without departing from the scope or spirit of the present disclosure. The following detailed description is, therefore, not to be taken in a limiting sense.
FIG. 1 illustrates a schematic diagram of a blood detection system, according to an exemplary embodiment of the present invention. During the use process, the center of the armband is the same as the height of the heart. The pressurizing process is started through the switch of the operating system, the inflation is realized, the deflation is realized through the deflation valve, the pressure is sensed through the pressure sensor, the analog-to-digital conversion is carried out after the signal filtering and amplification, and the signal is further processed.
FIG. 2 illustrates a functional block diagram of a blood testing system, according to an exemplary embodiment of the present invention. The blood detection system comprises a sleeve, a pump inflation module, a valve deflation module, a pressure sensing module, a signal amplification module, a signal filtering module, an analog-to-digital conversion module, a central processing module, a storage module, a display module and a prompt module. The oversleeve is used for winding and fixing on the arm of a user and is connected with the pump inflation module and the valve deflation module; the pump inflation module and the valve deflation module are used for realizing inflation and deflation; the pressure sensing module adopts a bridge structure, the resistance value changes along with the change of the sensed pressure, and the resistance change is changed into a voltage signal; the signal amplification module and the signal filtering module are used for amplifying and filtering the voltage signal, forming a digitized signal by an analog-to-digital conversion module according to the amplified and filtered result, processing data by the central processing module, storing the data processing result in the storage module and displaying the data processing result on the display module; when the central processing module judges that the blood pressure data is abnormal, the prompting module prompts a user.
Fig. 3 illustrates a block diagram of a signal amplification module according to an exemplary embodiment of the present invention. The signal amplification module includes: the signal amplification module takes a voltage signal VIN formed by resistance change as input and inputs the voltage signal VIN to the base electrode of the transistor Q1, and the emitter electrode of the transistor Q1 is connected with one end of the current source C1 and the collector electrode of the transistor Q4; the other end of the current source C1 is connected to one end of the current source C2, the collector of the transistor Q6 and the high supply voltage VDD; the collector of the transistor Q1 is connected with the anode of the diode D1 and the base of the transistor Q2; the collector of the transistor Q2 is connected with one end of the capacitor C1 and the base of the transistor Q3; the collector of the transistor Q3 is connected with the other end of the capacitor C1, the cathode of the diode D3, the base of the transistor Q7 and the collector of the transistor Q5; the base of the transistor Q4 is connected with the output VOUT of the signal amplification module, the emitter of the transistor Q6 and the collector of the transistor Q7; the emitter of the transistor Q4 is connected with the base of the transistor Q5; the other end of the current source C2 is connected with the base of the transistor Q6 and the anode of the diode D2; the cathode of the diode D2 is connected with the anode of the diode D3; the cathode of the diode D1, the emitter of the transistor Q2, the emitter of the transistor Q3, the emitter of the transistor Q5, and the emitter of the transistor Q7 are connected to the low power supply voltage VEE. Through this amplification structure, can realize the accurate amplification of signal, be convenient for convert the signal of sensing little voltage into great signal suitable for processing.
Fig. 4 illustrates a block diagram of an alternative of a signal amplification module, according to an exemplary embodiment of the present invention. The difference between the structure and the structure shown in fig. 3 is that the input signal is converted by the voltage transformation module to form a differential double-end input, so that interference and temperature drift can be effectively suppressed. Wherein: the signal amplification module takes a voltage signal VIN + formed by resistance change as a positive input and inputs the voltage signal VIN + to the base of the transistor Q1, and the signal amplification module takes the voltage signal VIN + output by the voltage transformation module as the positive input and inputs the voltage signal VIN + to the base of the transistor Q1; the signal amplification module takes the voltage signal VIN output by the voltage transformation module as the negative input of the voltage amplification module and inputs the voltage signal VIN to the base electrode of the transistor Q8; the emitter of the transistor Q1 is connected with one end of the current source C1, the emitter of the transistor Q8 and the collector of the transistor Q4; the other end of the current source C1 is connected to one end of the current source C2, the collector of the transistor Q6 and the high supply voltage VDD; the collector of the transistor Q1 is connected with the anode of the diode D1 and the base of the transistor Q2; the collector of the transistor Q2 is connected with one end of the capacitor C1, the collector of the transistor Q8 and the base of the transistor Q3; the collector of the transistor Q3 is connected with the other end of the capacitor C1, the cathode of the diode D3, the base of the transistor Q7 and the collector of the transistor Q5; the base of the transistor Q4 is connected with the output VOUT of the signal amplification module, the emitter of the transistor Q6 and the collector of the transistor Q7; the emitter of the transistor Q4 is connected with the base of the transistor Q5; the other end of the current source C2 is connected with the base of the transistor Q6 and the anode of the diode D2; the cathode of the diode D2 is connected with the anode of the diode D3; the cathode of the diode D1, the emitter of the transistor Q2, the emitter of the transistor Q3, the emitter of the transistor Q5, and the emitter of the transistor Q7 are connected to the low power supply voltage VEE. The voltage transformation module divides a voltage signal VIN formed by resistance change into two paths for output, wherein one path of signal VIN + is an original signal VIN, and the other path of signal VIN-is a signal with the polarity opposite to that of the original signal VIN. Since this technique is well known in the art of conversion technology, a description thereof will be omitted herein in order not to obscure the focus of the present invention. Through this amplification structure, can realize the accurate amplification of signal, be convenient for convert the signal of sensing little voltage into great signal suitable for processing.
Preferably, current source C1 and current source C2 are wilson current sources.
Fig. 5 illustrates a block diagram of a signal filtering module according to an exemplary embodiment of the present invention. The signal filtering module includes: one end of the inductor L11 is connected to an input signal Vi, which is the output VOUT of the signal amplification module; the other end of the inductor L11 is connected to one end of the capacitor C11, one end of the capacitor C12, and one end of the inductor L12; the other end of the capacitor C12 is connected to the other end of the inductor L12 and one end of the capacitor C13; the other end of the capacitor C13 is connected to one end of the resistor R11 and one end of the inductor L13; the other end of the inductor L13 is connected with one end of a capacitor C14; the other end of the resistor R11 is connected to one end of the resistor R12 and one end of the inductor L14; the output end of the resistor R12 is connected with the output Vo of the signal filtering module; the other end of the capacitor C11, the other end of the capacitor C14, and the other end of the inductor L14 are grounded. Through the signal filtering module, the signal amplified by the signal amplifying module can be filtered, so that a proper frequency band is obtained, and a filtering signal conforming to the blood pressure representation is formed.
Fig. 6 illustrates a block diagram of an alternative implementation of a signal filtering module, according to an exemplary embodiment of the present invention. The signal filtering module includes: one end of the inductor L21 is connected to an input signal Vi, which is the output VOUT of the signal amplification block, and one end of the capacitor C21; the other end of the inductor L21 is connected to the other end of the capacitor C21, one end of the capacitor C22, one end of the inductor L22 and one end of the capacitor C23; the other end of the capacitor C22 is connected to one end of the inductor L24, one end of the capacitor C25, one end of the capacitor C24 and one end of the inductor L23; the other end of the inductor L24 is connected with the other end of the capacitor C25 and the output Vo of the signal filtering module; the other end of the inductor L22, the other end of the capacitor C23, the other end of the capacitor C24, and the other end of the inductor L23 are grounded. Through the signal filtering module, the signal amplified by the signal amplifying module can be filtered, so that a proper frequency band is obtained, and a filtering signal conforming to the blood pressure representation is formed.
Fig. 7 illustrates a block diagram of another alternative embodiment of a signal filtering module, according to an exemplary embodiment of the present invention. The signal filtering module includes: one end of the capacitor C31 is connected to an input signal Vi, which is an output VOUT of the signal amplification block, and one end of the inductor L31, one end of the resistor R31, one end of the inductor L32, and one end of the capacitor C32; the other end of the resistor R31 is connected to one end of a resistor R32, the other end of an inductor L32, one end of a capacitor C33, and one end of an inductor L33; the other end of the resistor R32 is connected to one end of a resistor R33, the other end of an inductor L33, one end of a capacitor C34, and one end of an inductor L34; the other end of the resistor R33 and the other end of the inductor L34 are connected with the output Vo of the signal filtering module; the other end of the inductor L31, the other end of the capacitor C32, the other end of the capacitor C33, and the other end of the capacitor C34 are grounded. Through the signal filtering module, the signal amplified by the signal amplifying module can be filtered, so that a proper frequency band is obtained, and a filtering signal conforming to the blood pressure representation is formed.
Fig. 8 illustrates a block diagram of an analog-to-digital conversion module, according to an exemplary embodiment of the present invention. Wherein the filtered signal is input to one end of a comparator, the other end of the comparator is connected to the output of a switch tree, the comparator inputs the comparison result to the SAR, the SAR feeds the result back to the switch tree and sends it to an output latch buffer, the switch tree is connected to a 256R resistor ladder, and the output latch buffer outputs the signal when enabled.
In addition, after the central processing module performs data processing, the result of the data processing is stored in the storage module for data recording, and the data can be used for longitudinal comparison by a user. For example, the user can select the relevant history record at a certain time recorded in the storage module, and further determine the variation range of the blood pressure at a fixed time or a period of each day, so that the user can conveniently master the self health condition, and can conveniently analyze the cause of the variation, such as excitement, anger, smoking, watching movie and TV drama, dining and the like.
After the central processing module performs data processing, the result is displayed on the display module, and optionally, the blood detection system may further include a voice module, the central processing module performs voice broadcast on the data, and the voice broadcast may be written with the storage module to query historical data, so as to compare the historical data of the user at the same time or in a similar time period, and facilitate the user to receive and master the change condition of the blood pressure of the user.
After the central processing module processes the data, when the blood pressure data is judged to be abnormal, the prompting module can prompt the user. The abnormality may include an excessively low blood pressure value or an excessively high blood pressure value.
The above-mentioned technical terms are conventional technical terms having ordinary meanings in the art, and are not further explained herein in order not to obscure the point of the present invention.
In summary, in the technical solution of the present invention, a blood detection system is adopted, which is convenient to carry, and a specific circuit is adopted to perform high-precision acquisition on a blood pressure signal, process the signal with high precision, and finally remind or inform the health condition of a person to be tested through display or prompt.
It will be understood that: the examples and embodiments of the invention may be implemented in hardware, software, or a combination of hardware and software. As mentioned above, any body performing this method may be stored, for example, in the form of volatile or non-volatile storage, for example, a storage device, like a ROM, whether erasable or rewritable or not, or in the form of memory, such as for example a RAM, a memory chip, a device or an integrated circuit, or on an optically or magnetically readable medium, such as for example a CD, a DVD, a magnetic disk or a magnetic tape. It will be understood that: storage devices and storage media are examples of machine-readable storage suitable for storing one or more programs that, when executed, implement examples of the present invention. Examples of the present invention may be conveyed electronically via any medium, such as a communications signal carried by a wired or wireless coupling, and the examples contain the same where appropriate.
It should be noted that: because the invention solves the technical problems of convenient carrying, adopting a specific circuit to carry out high-precision acquisition on the blood pressure signal, processing the signal with higher precision, and finally reminding or informing the health condition of the tested person through displaying or prompting, adopts the technical means which can be understood by technicians in the technical field of medical detection according to the teaching of the specification after reading the specification, and obtains beneficial technical effects, the scheme claimed in the appended claims belongs to the technical scheme in the meaning of patent law. Furthermore, the solution claimed in the appended claims has utility since it can be manufactured or used in industry.
The above description is only a preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention are included in the scope of the present invention. Unless expressly stated otherwise, each feature disclosed is one example only of a generic series of equivalent or similar features. Therefore, the protection scope of the present invention shall be subject to the protection scope of the claims.
Claims (1)
1. A blood testing system comprising: the device comprises a sleeve, a pump inflation module, a valve deflation module, a pressure sensing module, a signal amplification module, a signal filtering module, an analog-to-digital conversion module, a central processing module, a storage module, a display module and a prompt module;
wherein: the oversleeve is used for winding and fixing on the arm of the user and is connected with the pump inflation module and the valve deflation module; the pump inflation module and the valve deflation module are used for realizing inflation and deflation; the pressure sensing module adopts a bridge structure, the resistance value changes along with the change of the sensed pressure, and the resistance change is changed into a voltage signal; the signal amplification module and the signal filtering module are used for amplifying and filtering the voltage signal, forming a digitized signal by an analog-to-digital conversion module according to the amplified and filtered result, processing data by the central processing module, storing the data processing result in the storage module and displaying the data processing result on the display module; when the central processing module judges that the blood pressure data is abnormal, a prompt module prompts a user;
wherein the signal amplification module comprises any one of the following structures:
(1) the signal amplification module takes a voltage signal VIN formed by resistance change as input and inputs the voltage signal VIN to the base electrode of the transistor Q1, and the emitter electrode of the transistor Q1 is connected with one end of the current source C1 and the collector electrode of the transistor Q4; the other end of the current source C1 is connected to one end of the current source C2, the collector of the transistor Q6 and the high supply voltage VDD; the collector of the transistor Q1 is connected with the anode of the diode D1 and the base of the transistor Q2; the collector of the transistor Q2 is connected with one end of the capacitor C1 and the base of the transistor Q3; the collector of the transistor Q3 is connected with the other end of the capacitor C1, the cathode of the diode D3, the base of the transistor Q7 and the collector of the transistor Q5; the base of the transistor Q4 is connected with the output VOUT of the signal amplification module, the emitter of the transistor Q6 and the collector of the transistor Q7; the emitter of the transistor Q4 is connected with the base of the transistor Q5; the other end of the current source C2 is connected with the base of the transistor Q6 and the anode of the diode D2; the cathode of the diode D2 is connected with the anode of the diode D3; the cathode of the diode D1, the emitter of the transistor Q2, the emitter of the transistor Q3, the emitter of the transistor Q5, and the emitter of the transistor Q7 are connected to the low power supply voltage VEE;
(2) the signal amplification module takes a voltage signal VIN + formed by resistance change as a positive input and inputs the voltage signal VIN + to the base of the transistor Q1, and the signal amplification module takes the voltage signal VIN + output by the voltage transformation module as the positive input and inputs the voltage signal VIN + to the base of the transistor Q1; the signal amplification module takes the voltage signal VIN output by the voltage transformation module as the negative input of the voltage amplification module and inputs the voltage signal VIN to the base electrode of the transistor Q8; the emitter of the transistor Q1 is connected with one end of the current source C1, the emitter of the transistor Q8 and the collector of the transistor Q4; the other end of the current source C1 is connected to one end of the current source C2, the collector of the transistor Q6 and the high supply voltage VDD; the collector of the transistor Q1 is connected with the anode of the diode D1 and the base of the transistor Q2; the collector of the transistor Q2 is connected with one end of the capacitor C1, the collector of the transistor Q8 and the base of the transistor Q3; the collector of the transistor Q3 is connected with the other end of the capacitor C1, the cathode of the diode D3, the base of the transistor Q7 and the collector of the transistor Q5; the base of the transistor Q4 is connected with the output VOUT of the signal amplification module, the emitter of the transistor Q6 and the collector of the transistor Q7; the emitter of the transistor Q4 is connected with the base of the transistor Q5; the other end of the current source C2 is connected with the base of the transistor Q6 and the anode of the diode D2; the cathode of the diode D2 is connected with the anode of the diode D3; the cathode of the diode D1, the emitter of the transistor Q2, the emitter of the transistor Q3, the emitter of the transistor Q5, and the emitter of the transistor Q7 are connected to the low power supply voltage VEE; the voltage transformation module divides a voltage signal VIN formed by resistance change into two paths for output, wherein one path of signal VIN + is an original signal VIN, and the other path of signal VIN-is a signal with the polarity opposite to that of the original signal VIN;
by the structure of the signal amplification module, the accurate amplification of signals can be realized, and the sensed signals can be conveniently converted into signals suitable for processing;
current source C1 and current source C2 are wilson current sources;
the signal filtering module comprises any one of the following structures:
(1) one end of the inductor L11 is connected to an input signal Vi, which is the output VOUT of the signal amplification module; the other end of the inductor L11 is connected to one end of the capacitor C11, one end of the capacitor C12, and one end of the inductor L12; the other end of the capacitor C12 is connected to the other end of the inductor L12 and one end of the capacitor C13; the other end of the capacitor C13 is connected to one end of the resistor R11 and one end of the inductor L13; the other end of the inductor L13 is connected with one end of a capacitor C14; the other end of the resistor R11 is connected to one end of the resistor R12 and one end of the inductor L14; the output end of the resistor R12 is connected with the output Vo of the signal filtering module; the other end of the capacitor C11, the other end of the capacitor C14 and the other end of the inductor L14 are grounded;
(2) the signal filtering module includes: one end of the inductor L21 is connected to an input signal Vi, which is the output VOUT of the signal amplification block, and one end of the capacitor C21; the other end of the inductor L21 is connected to the other end of the capacitor C21, one end of the capacitor C22, one end of the inductor L22 and one end of the capacitor C23; the other end of the capacitor C22 is connected to one end of the inductor L24, one end of the capacitor C25, one end of the capacitor C24 and one end of the inductor L23; the other end of the inductor L24 is connected with the other end of the capacitor C25 and the output Vo of the signal filtering module; the other end of the inductor L22, the other end of the capacitor C23, the other end of the capacitor C24, and the other end of the inductor L23 are grounded;
(3) the signal filtering module includes: one end of the capacitor C31 is connected to an input signal Vi, which is an output VOUT of the signal amplification block, and one end of the inductor L31, one end of the resistor R31, one end of the inductor L32, and one end of the capacitor C32; the other end of the resistor R31 is connected to one end of a resistor R32, the other end of an inductor L32, one end of a capacitor C33, and one end of an inductor L33; the other end of the resistor R32 is connected to one end of a resistor R33, the other end of an inductor L33, one end of a capacitor C34, and one end of an inductor L34; the other end of the resistor R33 and the other end of the inductor L34 are connected with the output Vo of the signal filtering module; the other end of the inductor L31, the other end of the capacitor C32, the other end of the capacitor C33, and the other end of the capacitor C34 are grounded;
in the analog-to-digital conversion module, a filtered signal is input to one end of a comparator, the other end of the comparator is connected with the output of a switch tree, the comparator inputs a comparison result into an SAR, the SAR feeds the result back to the switch tree and sends the result to an output latch buffer, the switch tree is connected to a 256R resistor ladder, and the output latch buffer outputs a signal when enabled;
after the central processing module processes data, the data processing result is stored in the storage module for data recording and for a user to perform longitudinal comparison; the user selects the relevant historical records at a certain moment recorded in the storage module, and then the change range of the blood pressure of the user at a fixed moment or a fixed time period every day is judged, so that the user can conveniently master the health condition of the user and conveniently analyze the reason of the change; and
the blood detection system also comprises a voice module which is used for voice broadcasting of the data processed by the central processing module, writing the data with the storage module and inquiring historical data so as to compare the historical data of the user at the same time or in a similar time period, and thus the user can conveniently receive and master the change condition of the blood pressure of the user;
after the central processing module processes data, when the blood pressure data is judged to be abnormal, a prompting module prompts a user; the abnormality includes an excessively low blood pressure value or an excessively high blood pressure value.
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|---|---|---|---|---|
| US5406953A (en) * | 1991-06-24 | 1995-04-18 | Bui; Hoanh | Apparatus for measurement of blood pressure with electronic amplification system for Karotkoff sounds |
| CN1923134A (en) * | 2005-08-30 | 2007-03-07 | 潘卫江 | Electronic sphygmomanometer |
| CN102144918A (en) * | 2010-02-05 | 2011-08-10 | 杨照叶 | Blood pressure and heart rate detection system capable of realizing remote data transmission monitoring |
| CN107684415A (en) * | 2016-08-05 | 2018-02-13 | 成都宇卓时代科技有限公司 | A kind of blood pressure intelligent checking system |
| CN108771538A (en) * | 2018-07-05 | 2018-11-09 | 江苏医药职业学院 | A kind of blood monitoring system |
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2019
- 2019-01-18 CN CN201910047435.4A patent/CN109745024B/en active Active
Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5406953A (en) * | 1991-06-24 | 1995-04-18 | Bui; Hoanh | Apparatus for measurement of blood pressure with electronic amplification system for Karotkoff sounds |
| CN1923134A (en) * | 2005-08-30 | 2007-03-07 | 潘卫江 | Electronic sphygmomanometer |
| CN102144918A (en) * | 2010-02-05 | 2011-08-10 | 杨照叶 | Blood pressure and heart rate detection system capable of realizing remote data transmission monitoring |
| CN107684415A (en) * | 2016-08-05 | 2018-02-13 | 成都宇卓时代科技有限公司 | A kind of blood pressure intelligent checking system |
| CN108771538A (en) * | 2018-07-05 | 2018-11-09 | 江苏医药职业学院 | A kind of blood monitoring system |
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