CN115085507A - Low-cost high-reliability wearable monitoring ring with inertial magnetoelectric energy supply function - Google Patents

Abstract

The invention provides a low-cost high-reliability inertial magnetoelectricity energy supply wearable monitoring ring which comprises a shell and is characterized by further comprising a mechanical part and a circuit part, wherein the mechanical part and the circuit part are fixed on the shell, if the part of a monitored object wearing the monitoring ring swings, the mechanical part swings along with the monitoring ring to collect generated energy and generate electric energy, the circuit part collects the electric energy generated by the mechanical part and supplies power for a low-power-consumption SOC (system on chip) system in the mechanical part, the low-power-consumption SOC system utilizes a built-in sensor and the mechanical part to jointly complete information sensing, and current sensing data information is sent through a wireless networking protocol under the condition of electric energy supply. The wearable monitoring ring has reliable energy supply, no sensor, extremely low cost and high reliability, and realizes the minimization and the simplification of a hardware end and a software end. The swing arm or shank passes through mechanical structure and produces the electric energy, and the electric energy is the energy supply of thing networking mainboard, and then sends data information, realizes remote monitoring.

Description

Low-cost high-reliability wearable monitoring ring with inertial magnetoelectric energy supply function

Technical Field

The invention relates to a battery-free monitoring bracelet/foot ring, in particular to a wearable monitoring ring with low cost and high reliability and capable of realizing inertial magnetoelectric energy supply.

Background

The battery-carried Internet of things monitoring equipment based on various additional sensors is a problem of fire heat in the field of Internet of things in the past few years. The monitoring of animals such as livestock and pets or people such as infants and patients who need to be cared additionally can enable people to acquire the body or the environment condition of the animals in time, and is beneficial to more intelligent and efficient management.

Most of the monitoring means are that a bracelet or a foot ring is worn by a monitored person, various data are collected and processed by a built-in battery, a Micro Control Unit (MCU) and a sensor, and then the data are uploaded to an upper computer. However, the presence of batteries and sensors limits the lifetime of these monitoring devices. The enormous manpower and material costs associated with replacing and maintaining batteries and sensors also limit the widespread commercialization of these internet of things monitoring devices. The passive internet of things scheme utilizes an advanced energy collection technology, collects energy from the environment and supplies energy to the sensor, so that data collection gradually becomes mainstream. However, monitoring in the field of passive internet of things is just started, related applications are few, external energy input such as solar energy, radio frequency signals and temperature difference is mostly adopted, and monitoring equipment cannot normally work at night when signals are unstable or environment temperature difference is not obvious. These solutions are also equipped with energy consuming sensors, further limiting the efficiency of energy harvesting. The wearable monitoring ring which relies on stable self-power generation and does not need sensors and has low cost and high reliability does not exist in the monitoring field nowadays.

Disclosure of Invention

The technical problem to be solved by the invention is as follows: most of monitoring equipment in the field of passive internet of things adopts external energy input such as solar energy, radio frequency signals, temperature difference and the like, and is provided with an energy-consuming sensor.

In order to solve the technical problem, the technical scheme of the invention is to provide a wearable monitoring ring with low cost and high reliability for inertial magnetoelectric energy supply, which comprises a shell and is characterized by further comprising a mechanical part and a circuit part, wherein the mechanical part and the circuit part are fixed on the shell, after a monitored object wears the monitoring ring, if the part of the monitored object wearing the monitoring ring swings, the mechanical part swings along with the monitoring ring, the generated energy is further collected, electric energy is generated, the circuit part collects the electric energy generated by the mechanical part and supplies power for a low-power-consumption SOC system in the monitored object, the low-power-consumption SOC system utilizes a built-in sensor and the mechanical part to jointly complete information sensing, and current sensing data information is sent through a wireless networking protocol under the condition of electric energy supply.

Preferably, the sensing of the swing information is performed by the mechanical part, the low power consumption SOC system obtains the step number and the attitude sensing data based on a relationship between the step number, the attitude, and the swing information, and the low power consumption SOC system obtains the temperature sensing data using a sensor built therein.

Preferably, the mechanical part comprises a high energy density electromagnetic power generation device for converting inertial force into electric power and an integrated swinging soft beam, wherein:

the high energy density electromagnetic generating device comprises an insulating shell; an enameled copper coil used for generating the electric energy is wound outside the middle part of the insulating shell; an opening is formed in the side wall of one of the left side and the right side of the insulating shell, two iron sheets which are arranged up and down are arranged in the other side of the insulating shell, and a magnet is arranged between the two iron sheets;

the middle part of the integrated swinging soft beam is a soft beam, and the two ends of the soft beam are provided with a shifting iron sheet and a balancing weight; the balancing weight is positioned outside the shell and used for increasing inertia, so that the balancing weight drives the soft beam and the stirring iron sheet to swing due to the small-amplitude and small-acceleration swinging of the part of the monitored object wearing the monitoring ring; stir the iron sheet and stretch into until being located between two iron sheets in the insulating casing through the opening of insulating casing one side, if mechanical part does not swing, stir the iron sheet and adsorb on one of two iron sheets of high energy density electromagnetic generating device, if mechanical part swing stirs the iron sheet and makes a round trip to adsorb between two iron sheets of high energy density electromagnetic generating device, and the magnetic pole adsorbs the switching takes place in the twinkling of an eye at every absorption switching, and magnetic field changes, and enameled copper coil produces the electric energy.

Preferably, a fixed shaft is arranged in the middle of the soft beam, and the upper end and the lower end of the fixed shaft respectively penetrate into the holes in the upper portion and the lower portion of the shell to prevent the integrated swinging soft beam from falling off in the swinging process.

Preferably, the circuit part adopts a low-power consumption internet of things mainboard with an energy management function, and the low-power consumption internet of things mainboard comprises an energy management circuit and a low-power consumption SOC system.

Preferably, in the energy management circuit, the electric energy output by the mechanical part is rectified by a rectifier and then stored in a capacitor, the under-voltage locking function judges whether the electric quantity is sufficient, and if the electric quantity is sufficient, the electric quantity is stabilized by a voltage stabilizer and then transmitted to the low-power-consumption SOC system.

In view of the cross-field characteristics of the power-free equipment, the electromechanical collaborative design is needed, and the invention integrates two parts of machinery and a circuit. The intelligent power supply system comprises an inertial magnetoelectric energy supply mechanical structure, a small Internet of things mainboard with an energy management function, and an adaptive shell conforming to kinematics. The wearable monitoring ring is reliable in energy supply, sensor-free, extremely low in cost and high in reliability, and the minimization and the simplification of a hardware end and a software end are achieved. The monitored person wears the monitoring ring, and in the normal walking or running process, the swinging arm or shank generates electric energy through a mechanical structure, and the electric energy supplies energy for the internet of things mainboard, and then sends data information, realizes remote monitoring.

Drawings

FIG. 1 is a schematic perspective view of an embodiment of a wearable monitoring ring with low cost and high reliability and an inertial magnetoelectric energy supply;

FIG. 2 is a schematic perspective view of another direction of an inertial magnetoelectric powered wearable monitoring ring with low cost and high reliability according to an embodiment;

FIG. 3 is a schematic diagram of a high energy density electromagnetic power generation apparatus;

FIG. 4 is a cross-sectional view of a high energy density electromagnetic generating device;

FIG. 5 is a schematic structural view of the integrated swing flexible beam;

fig. 6 is a flow chart of the energy source of the present embodiment.

Detailed Description

The invention will be further illustrated with reference to the following specific examples. It should be understood that these examples are for illustrative purposes only and are not intended to limit the scope of the present invention. Further, it should be understood that various changes or modifications of the present invention may be made by those skilled in the art after reading the teaching of the present invention, and such equivalents may fall within the scope of the present invention as defined in the appended claims.

As shown in fig. 1 and fig. 2, the wearable monitoring ring with low cost and high reliability and an inertial magnetoelectric energy supply disclosed in this embodiment includes a housing, a mechanical portion, and a circuit portion.

The shell comprises an upper shell 1 and a lower shell 2 which are buckled up and down, and the mechanical part and the circuit part are fixed by screws. In this embodiment, the shell is made of PLA material, and has a length of 32mm, a width of 40mm and a height of 14 mm.

The mechanical part consists of a high-energy-density electromagnetic generating device 3 for converting inertia force into electric power and an integrated swinging soft beam 4. With reference to fig. 3 and 4, the high energy density electromagnetic power generation device 3 includes a plastic ABS housing 3-1, wherein an open cavity 3-1-1 is formed on each of the left and right sides of the inside of the plastic ABS housing 3-1, and the opening of the cavity 3-1-1 is located on the side wall of each of the left and right sides of the plastic ABS housing 3-1. The two chambers 3-1-1 are in communication via a channel 3-1-2 in the plastic ABS housing 3-1. The height of the chamber 3-1-1 is greater than the height of the channel 3-1-2. Two iron sheets 3-2 are arranged in the cavity 3-1-1 on any side, and the two iron sheets 3-2 are arranged up and down in the cavity 3-1-1 and are spaced at a certain distance from each other. A magnet 3-3 is arranged between the two iron sheets 3-2, and the two iron sheets 3-2 are respectively adsorbed on the upper and lower surfaces of the magnet 3-3. An enameled copper coil 3-4 is wound outside the middle part of the plastic ABS shell 3-1, the enameled copper coil 3-4 is positioned outside the channel 3-1-2, and the width of the enameled copper coil is equal to that of the channel 3-1-2. In the present invention, the left-right direction is defined as the width direction.

In the embodiment, the enameled copper coil 3-4 is made of copper wire, the magnetic force of the magnet 3-3 is 180mT, and the iron sheet 3-2 is made of common pure iron.

Referring to fig. 5, the integrated swinging soft beam 4 comprises a shifting iron sheet 4-1, a soft beam 4-2, a fixed shaft 4-3 and a balancing weight 4-4. The poking iron sheet 4-1 and the heavy block 4-4 are respectively arranged at two ends of the soft beam 4-2, and the middle part of the soft beam 4-2 is provided with a fixed shaft 4-3. The iron sheet 4-1 is stirred to extend into the plastic ABS shell 3-1 from the opening of the cavity at the other side of the high-energy-density electromagnetic generating device 3, which is not provided with the iron sheet 3-2 and the magnet 3-3, until the iron sheet is positioned between the two iron sheets 3-2. The balancing weight 4-4 is positioned outside the shell, the balancing weight increases the overall mass of the monitoring ring, increases the inertia, and enables the balancing weight 4-4 to drive the soft beam 4-2 and the stirring iron sheet 4-1 to swing through the small amplitude and small acceleration of the arm or the calf. The upper end and the lower end of the fixed shaft 4-3 respectively penetrate into the openings of the upper shell 1 and the lower shell 2, so that the soft beam 4-2 can be prevented from falling off in the swinging process. The soft beam 4-2 can increase the force arm so as to reduce the acting force under the same moment, and the material is soft, so that the swinging of the balancing weight 4-4 is smoother. Stirring iron sheet 4-1 and can adsorbing repeatedly between two iron sheets 3-2 in high energy density electromagnetism power generation facility 3 at the swing in-process, adsorbing the switching in the twinkling of an eye at every turn, the polarity in magnetic field also can switch, because the electromagnetic induction law, the magnetic field of change makes the coil produce the electric current, transmits to the circuit part.

In the embodiment, the soft beam 4-2 is made of copper, the fixing shaft 4-3 is made of common pure iron, the balancing weight 4-4 is made of common pure iron, and the mass of the balancing weight 4-4 is 24 g.

The circuit part adopts a low-power-consumption Internet of things mainboard 5 with an energy management function and consists of an energy management circuit and a low-power-consumption SOC (system on chip) system. In the energy management circuit, the current generated by the magnetoelectric transducer is rectified by the rectifier and then stored in the capacitor, and whether the electric quantity is sufficient or not is judged by the under-voltage locking function. If the voltage is sufficient, the electric quantity is stabilized by the voltage stabilizer and then is transmitted to the low-power-consumption SOC system. By compiling embedded internet of things codes with extremely low power consumption, the low-power-consumption SOC system can smoothly send current data information through wireless networking protocols such as Bluetooth, WIFI and ZigBee under the condition of electric energy supply.

In the embodiment, the energy management circuit has four functions of rectification, energy storage, under-voltage locking and voltage stabilization, the low-power-consumption SOC adopts an nrf52832 minimum system, and the circuit board is 20mm long and 20mm wide. The monitoring ring provided by the embodiment has the advantages of 61mm in overall length, 32mm in width, 14mm in height and 54g in weight.

When the arm or the lower leg does not swing, that is, the monitoring ring disclosed in this embodiment is in a static state, the toggle iron sheet 4-1 of the integrated swing flexible beam 4 is attracted to one of the two iron sheets 3-2 of the high energy density electromagnetic power generation device 3 due to magnetism. The magnetic pole between the two iron sheets 3-2 is stable, the magnetic field is unchanged, and the enameled copper coil 3-4 is not electrified.

In connection with fig. 6, when the arm or lower leg oscillates, energy is generated therefrom, and the housing and the mechanical part follow the oscillation at the same angular velocity. Due to the inertia of the balancing weight 4-4, the shifting iron sheet 4-1 of the integrated swinging soft beam 4 can be adsorbed back and forth between the two iron sheets 3-2 of the high-energy-density electromagnetic generating device 3, the magnetic poles can be switched instantly in each adsorption switching, the magnetic field is changed, the enameled copper coil 3-4 generates current, and the collection of magnetoelectric energy is completed. Electrical energy may enter the energy management circuitry of the circuit portion. When the swing reaches a certain number of times, the electric quantity stored by the capacitor in the energy management circuit is released to supply power to the low-power-consumption SOC, so that the sensing and transmission of the environmental data information are completed, the energy and the data information in the whole process come from the environment, and the marginal reliability of the data information is ensured.

The invention adopts stable and reliable mechanical energy for energy supply, does not need an additional power electronic module, adopts an advanced and low-cost energy management circuit to directly finish the storage management of the original energy, and utilizes the temperature sensor built in the MCU and the direct proportion relationship between the information such as the step number, the attitude and the like and the swing amplitude, the swing frequency and the like. According to the invention, no additional sensor is needed, the MCU and the mechanical part are used for sensing information, the low-power-consumption SOC with the simplest software and hardware is used for analyzing and processing the information, and the supply and demand balance adaptive to the passive Internet of things is realized. The invention constructs a brand new passive monitoring framework, and makes wide deployment and commercial use of passive monitoring equipment possible.

Experiments prove that a person can enable the high-energy-density electromagnetic generating device 3 to generate electricity once per 1.03 step in the normal walking process, can enable the nrf52832 to normally work once per 7.2 steps, and sends two iBeacon data packets containing environment temperature data and walking data of a monitored person through BLE (Bluetooth low energy). The Bluetooth signal can be received by a small program or an esp32 single chip microcomputer or a raspberry group of the mobile phone end, data can be displayed on a mobile phone or a television screen or an oled display screen, and the data can also be uploaded to a cloud platform for centralized analysis and visual processing.

Compared with the existing passive monitoring equipment, the passive monitoring equipment has a compact structure, and theories and practices prove that the passive monitoring equipment is deployed to livestock breeding and human motion monitoring, and can supply energy by depending on the motion of the livestock breeding and the human motion, so that the data monitoring functions of step number, posture, temperature and the like are reliably completed. The invention relates to wearable monitoring equipment with low cost and high reliability, which is based on motion energy supply and does not need an additional sensor. The result of the test run fully proves the feasibility, reliability and market value of the invention. The invention can be widely deployed in application scenes such as intelligent animal husbandry, intelligent medical treatment and the like, and the characteristics of no battery, low cost and high reliability enable large-scale commercial use in the later period to be possible.

Claims (6)

1. The utility model provides a wearable monitoring ring of inertia magnetoelectric energy supply of low-cost high reliability, which comprises an outer shell, a serial communication port, still including fixing mechanical part and the circuit part on the shell, after monitored object dresses the monitoring ring, when the monitored object dresses the position of monitoring ring and takes place the swing, mechanical part follows the swing, and then collect produced energy and produce the electric energy, circuit part collects the produced electric energy of mechanical part and for its inside low-power consumption SOC system power supply, this low-power consumption SOC system utilizes built-in sensor and mechanical part to accomplish the sensing of information jointly, and send current sensing data information through wireless networking protocol under the electric energy supply.

2. The wearable monitoring ring of claim 1, wherein the sensing of the swing information is accomplished by the mechanical part, the low power consumption SOC system obtains the step number and the attitude sensing data based on the relationship between the step number, the attitude and the swing information, and the low power consumption SOC system obtains the temperature sensing data by using a sensor built in the SOC system.

3. The low-cost high-reliability wearable monitoring ring with inertial magnetic and electric energy supply according to claim 1, wherein the mechanical part comprises a high-energy-density electromagnetic generating device for converting inertial force into electric power and an integrated swinging soft beam, wherein:

the high energy density electromagnetic generating device comprises an insulating shell; an enameled copper coil used for generating the electric energy is wound outside the middle part of the insulating shell; an opening is formed in the side wall of one of the left side and the right side of the insulating shell, two iron sheets which are arranged up and down are arranged in the other side of the insulating shell, and a magnet is arranged between the two iron sheets;

the middle part of the integrated swinging soft beam is a soft beam, and the two ends of the soft beam are provided with a shifting iron sheet and a balancing weight; the balancing weight is positioned outside the shell and used for increasing inertia, so that the balancing weight drives the soft beam and the stirring iron sheet to swing due to the small-amplitude and small-acceleration swinging of the part of the monitored object wearing the monitoring ring; stir the iron sheet and stretch into until being located between two iron sheets in the insulating casing through the opening of insulating casing one side, if mechanical part does not swing, stir the iron sheet and adsorb on one of two iron sheets of high energy density electromagnetic generating device, if mechanical part swing stirs the iron sheet and makes a round trip to adsorb between two iron sheets of high energy density electromagnetic generating device, and the magnetic pole adsorbs the switching takes place in the twinkling of an eye at every absorption switching, and magnetic field changes, and enameled copper coil produces the electric energy.

4. The wearable monitoring ring of claim 3, wherein a fixed shaft is disposed in the middle of the flexible beam, and the upper and lower ends of the fixed shaft penetrate into the holes in the upper and lower portions of the housing, respectively, to prevent the integrated swinging flexible beam from falling off during swinging.

5. The wearable monitoring ring of inertial magnetoelectric energy supply of low cost high reliability of claim 1, characterized in that, the circuit part adopts the low-power consumption thing networking mainboard of taking energy management function, including energy management circuit and low-power consumption SOC system.

6. The wearable monitoring ring of claim 5, wherein in the energy management circuit, the electrical energy output by the mechanical part is rectified by a rectifier, then stored in a capacitor, and judged by an under-voltage locking function whether the electrical quantity is sufficient, and if so, the electrical quantity is stabilized by a voltage stabilizer and then transmitted to the low-power SOC system.

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