CN104544698B - A kind of piezoelectric self-power supplied shoe with positioning function - Google Patents

Abstract

The invention discloses a piezoelectric self-powered positioning shoe. The positioning shoe includes a sole and an upper. The sole is provided with a power supply module, a control module, a GPS positioning module and a wireless communication module. The power supply module includes a piezoelectric power generation unit and an energy storage unit. unit, the shoe sole has a pressure deformation area, and the piezoelectric power generation unit includes: a pressure block that is in contact with the pressure deformation area; energy unit circuit connection. Under the action of human body gravity, the compression deformation area is deformed, and the pressure block in contact with the compression deformation area drives the piezoelectric body to deform due to the relative displacement. The piezoelectric body generates different charges during the deformation process, forming a potential difference. During the process of walking, the piezoelectric body continuously generates electricity and stores the electric energy in the energy storage unit, which can continuously drive the control module, GPS positioning module and wireless communication module to work regardless of time and natural conditions, and provide the wearer's positioning information to the outside world .

Description

A piezoelectric self-powered positioning shoe

technical field

The invention relates to a positioning shoe, in particular to a piezoelectric self-powered positioning shoe.

Background technique

In recent years, incidents of children, the elderly, and college students losing contact have occurred from time to time. How to locate the lost contact in time and how to send a request signal in time in case of an emergency is an urgent problem to be solved. Wearable positioning devices are a better solution. At present, products such as positioning watches, positioning shoes, and positioning schoolbags can be seen in the market.

However, most of these products are powered by batteries or external chargers, and the battery life is insufficient. Outdoor explorers fall behind or encounter accidents, the elderly or children get lost or encounter danger, undercover police encounter danger, important people or In many situations such as high-income people being kidnapped, once the power of the positioning device is exhausted, the user cannot charge the positioning device in time, which affects the use of the positioning device, greatly limits the rescue time in emergencies, and brings users It causes a lot of inconvenience and may endanger the life safety of users. Therefore, it is of great significance to develop and design a self-powered wearable device.

The Chinese patent document with the notification number CN203191588U discloses a self-powered positioning shoe. The self-powered positioning shoe includes a shoe body, and the shoe body further includes: a power supply module, a central processing module, a GPS positioning module and a wireless communication module, wherein, The power module is connected to the central processing module, and the power module further includes a nano friction generator and an energy storage device; the central processing module is connected to the GPS positioning module and controls the GPS positioning module to perform positioning; The central processing module is further connected to the wireless communication module and provides the positioning information generated by the GPS positioning module to the wireless communication module.

The Chinese patent document with the publication number CN102125327B discloses a solar positioning shoe, which includes a solar film, a first shoe body, a photoelectric converter installed at the first shoe body, a GPS module, and a storage battery. The solar film is laid on the outer surface of the first shoe, the photoelectric converter is connected to the solar film and converts the light energy obtained by the solar film into electrical energy, the photoelectric converter is connected to the storage battery, and The photoelectric converter inputs electrical energy into the storage battery, and the storage battery is connected to the GPS module and provides electrical energy to the GPS module; the solar positioning shoe also includes a multimedia module and a multimedia button connected to the multimedia module, The single-chip microcomputer is connected to the multimedia module, and the single-chip microcomputer sends out the multimedia information acquired by the multimedia module through the wireless sending module.

In the above-mentioned solar positioning shoes, it is difficult for the power module to achieve continuous self-power supply in special environments such as long-term darkness.

The Chinese patent document with the notification number CN203314228U discloses a GPS positioning shoe that can be charged automatically. The GPS positioning shoe that is automatically charged includes a GPS positioning device and a piezoelectric rubber that can generate electric energy under pressure. The electric energy generated by the piezoelectric rubber in the insole drives the GPS module and the mobile communication module (GSM/GPRS network) to work and provide the wearer's location information.

The disadvantage of the GPS positioning shoes is that after the piezoelectric rubber is stepped on, it is reset solely by the elastic force of the piezoelectric rubber itself. Affected by people’s walking steps, the piezoelectric rubber has not returned to its original position before the next step on the pressure, resulting in The deformation space of each deformation of piezoelectric rubber is limited, and the power generation efficiency is low.

Contents of the invention

The invention provides a piezoelectric self-powered positioning shoe, which can realize effective continuous self-power supply.

A piezoelectric self-powered positioning shoe, including a sole and an upper, a power module, a control module, a GPS positioning module and a wireless communication module are arranged in the sole, the power module includes a piezoelectric power generation unit and an energy storage unit, and the sole With a compressive deformation zone, the piezoelectric generating unit includes:

A pressing block that is in contact with the compression deformation zone;

The piezoelectric body is driven and deformed by the pressure block to generate electricity. The piezoelectric body is fixed in the sole and connected with the energy storage unit circuit.

Under the action of human body gravity, the compression deformation area of the sole is deformed, and the pressure block in contact with the compression deformation area drives the piezoelectric body to deform due to the relative displacement. The piezoelectric body generates different charges during the deformation process, forming a potential difference. , and output to the energy storage unit for storage. In this way, during the process of people walking, the piezoelectric body continues to generate electricity and store the generated electric energy in the energy storage unit, and the energy storage unit supplies power to the control module, GPS positioning module and wireless communication module respectively, and the GPS positioning module and wireless communication module are controlled The modules are manipulated to perform corresponding functions.

In the present invention, the installation method of the piezoelectric generating unit in the shoe sole is as follows: a seat is installed in the shoe sole, a housing cavity is provided in the seat, and a strip-shaped embedded hole is opened on the side wall of the housing cavity. The piezoelectric body includes a fixed end fixed in the bar-shaped embedding hole, and a suspended end in the accommodating cavity, and the pressure block interacts with the suspended end.

The piezoelectric body of the present invention is a cantilever beam structure, and the accommodating cavity provides a deformation space for the piezoelectric body, and the pressure block with relative displacement relative to the sole squeezes the suspended end of the piezoelectric body, so that the piezoelectric body bends and bends between the two sides. charge on the surface.

Preferably, the piezoelectric body includes an elastic plate, and a piezoelectric material layer is fixed on the outer surface of the elastic plate. In this way, not only the piezoelectric material can be saved, but also the service life of the piezoelectric body can be increased.

Preferably, the piezoelectric material layers are respectively fixed on two opposite sides of the elastic plate, and the two piezoelectric material layers are connected in series to increase the output voltage.

In the present invention, the pressure block includes a pressure plate and a pressure rod fixed on the bottom surface of the pressure plate, a guide hole is opened on the top surface of the seat body, and the pressure rod extends into the accommodating cavity through the guide hole and is connected with the pressure rod. The floating end of the electric body acts on each other, and a return spring abuts between the pressure plate and the top surface of the seat body;

The pressure plate is in contact with the pressure deformation zone of the sole.

The contact and cooperation between the pressure plate and the compression deformation area of the sole can increase the force-bearing area of the pressure block, and avoid discomfort to the feet caused by the small contact surface between the sole and the pressure block when the human body steps on it. The return spring between the pressure plate and the seat helps the pressure block to return to its original position in time when the pressure of the human body disappears, so as to avoid the extrusion of the piezoelectric body.

In the present invention, the accommodating cavity is provided with an axial limiting member that interacts with the pressing rod.

Preferably, the axial limiting member includes a limiting rod located on the inner wall of the accommodating cavity, and the pressing rod is provided with a bar-shaped pin hole matched with the limiting rod.

During the pressing down process of the pressure rod, the limit rod slides along the strip-shaped pin hole. On the one hand, the pressure block can be movably installed on the base, and on the other hand, the extrusion force of the pressure rod to the piezoelectric body can be limited to a certain extent.

As a further preference, the end portion of the limiting rod is an enlarged portion. The enlarged end helps prevent the stop bar from coming out of the bar pin hole.

Preferably, the pressure rod is provided with an embedding groove matching with the free end of the piezoelectric body. When the pressure of the human body disappears, the pressure rod returns to its original position by the action of the reset spring, and the cooperation between the embedded groove and the suspended end of the piezoelectric body helps to drive the piezoelectric body to reset in time when the pressure rod is reset, thereby increasing the pressure of the piezoelectric body when the pressure is pressed next time. The deformation space improves the power generation efficiency of the piezoelectric body.

In the present invention, an alarm switch is provided on the sole, and the alarm switch is used to trigger the control module to control the GPS positioning module to perform positioning and to control the wireless communication module to send positioning signals.

Preferably, the sole and the upper are connected and fixed by a zipper. The sole and the vamp are detachable, which is convenient for cleaning and replacing different vamps, and reduces the purchase cost of customers.

The working mode of the piezoelectric self-powered positioning shoes of the present invention is as follows:

During human walking, the compression deformation zone of the sole deforms under the action of human body gravity, and the pressure plate in contact with the compression deformation zone produces a relative displacement relative to the piezoelectric body, driving the pressure rod to squeeze the suspended end of the piezoelectric body, Therefore, the piezoelectric body bends and generates different charges on the two curved surfaces, forming a potential difference, and the generated electric energy is output to the energy storage unit through the circuit for storage. In this way, during the process of walking, the piezoelectric body continuously generates electricity and stores the generated electric energy in the energy storage unit, and the energy storage unit supplies power to the control module, the GPS positioning module and the wireless communication module respectively. The control module has two modes of software control and hardware control. Usually the whole system is in standby mode. When family members need to know the location of the wearer, they can send a query signal to the control module on the positioning shoe. After receiving the signal, the control module turns on the GPS positioning module and sends the acquired location information back to the location through the wireless communication module. Pass it to the interrogator to inform the family of the location of the shoe wearer; when the shoe wearer is in an emergency, he can trigger the alarm switch by himself, and the control module controls the GPS positioning module to obtain the location information and send the location information to the family through the wireless communication module Or an interrogation machine held by the police.

Compared with prior art, the beneficial effect of the present invention is:

(1) The power supply module of the present invention is provided with a piezoelectric generating unit, which converts mechanical energy generated by body weight or pressure into electrical energy by using a briquetting block and a piezoelectric body. This mechanical energy can be generated anytime and anywhere, thereby continuously providing energy for other The power supply of each module overcomes the problem of insufficient battery life of traditional positioning shoes;

(2) The present invention adopts a cantilever beam type piezoelectric body structure, and uses a return spring to drive the piezoelectric body and the pressing block to reset in time, thereby increasing the deformation space of the piezoelectric body when the next step is pressed, and improving the power generation efficiency and generating capacity;

(3) The present invention adopts a sandwich-type piezoelectric body, and the piezoelectric material layers on both sides of the elastic plate can be selected from different piezoelectric materials, so as to expand the range of raw materials, reduce the manufacturing cost of positioning shoes, and improve the use of piezoelectric materials at the same time life.

Description of drawings

Fig. 1 is a structural schematic diagram of piezoelectric self-powered positioning shoes of the present invention;

Fig. 2 is a connection diagram of the piezoelectric self-powered positioning system in the piezoelectric self-powered positioning shoe of the present invention;

Fig. 3 is a schematic structural view of the lower sole in Fig. 1;

Fig. 4 is a schematic structural diagram of the piezoelectric generating unit in Fig. 2;

Fig. 5 is the structural schematic diagram of seat body in Fig. 4;

Fig. 6 is the structural representation of briquetting among Fig. 4;

Fig. 7 is a structural schematic view of the compact in Fig. 4 at another viewing angle.

detailed description

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

As shown in Figure 1, a piezoelectric self-powered positioning shoe in this embodiment includes a lower sole 1, an upper sole 9 and a vamp 2, the lower sole 1 and the upper sole 9 are stitched or glued, and the vamp 2 and the upper The soles 9 are connected and fixed by the slide fastener 3.

A piezoelectric self-powered positioning system is installed in the lower sole 1. As can be seen from FIG. 2, the piezoelectric self-powered positioning system includes a power module, a control module, a GPS positioning module and a wireless communication module, and the power module supplies power to the other three modules respectively.

As can be seen from Figure 3, the bottom surface of the lower sole 1 is provided with a first cavity 11 and a second cavity 12, the second cavity 12 is used to install a power module, and the first cavity 11 is used to install a control module, a GPS positioning module and In the wireless communication module, the first cavity 11 and the second cavity 12 are connected through a wire slot 13 . Moreover, the area of the upper sole 9 corresponding to the second cavity 12 is a pressure deformation area.

It can be seen from Fig. 2, Fig. 3 and Fig. 4 that the power module includes a piezoelectric generating unit and an energy storage unit, wherein the piezoelectric generating unit includes a seat 4 installed in the second cavity 12, and a piezoelectric Body 5 and briquette 6.

It can be seen from Fig. 4 that the piezoelectric body 5 is in the shape of a sandwich, consisting of an elastic plate 53 and piezoelectric material layers 54 fixed on the upper and lower sides of the elastic plate 53, the two piezoelectric material layers 54 are connected in series, and one of the piezoelectric material layers 54 is connected to the positive electrode 81, another piezoelectric material layer 54 is connected to the negative electrode 82, and the voltage generated by the piezoelectric body 5 is output to the energy storage unit through the positive electrode 81 and the negative electrode 82.

It can be seen from Fig. 4 and Fig. 5 that the installation method of the piezoelectric body 5 is as follows: a housing chamber 41 is provided in the seat body 4, and a strip-shaped embedded hole 42 is opened on the side wall of the housing chamber 41. The fixed end 51 in the bar-shaped embedding hole 42 and the floating end 52 in the accommodating cavity 41 .

The seat body 4 is also provided with a threaded hole 43 corresponding to the position of the bar-shaped embedded hole 42, and the fixed end 51 of the piezoelectric body 5 is also provided with a threaded hole corresponding to the position and size. In this way, screws can be used to further fix the fixed end 51 of the piezoelectric body 5 in the bar-shaped embedding hole 42 .

It can be seen from Fig. 5 and Fig. 6 that the installation method of the pressing block 6 is as follows: the top surface of the seat body 4 is provided with a guide hole 46, and the pressing block 6 includes a pressing plate 61 and a pressing rod 62 fixed on the bottom surface of the pressing plate 61, wherein the pressing The plate 61 contacts and cooperates with the pressure deformation area of the upper sole 9, and the pressure rod 62 extends into the accommodation cavity 41 through the guide hole 46, and the pressure rod 62 is provided with a socket matching with the free end 52 of the piezoelectric body 5 64.

Moreover, both the bottom surface of the pressure plate 61 and the top surface of the seat body 4 are provided with contact holes 45 for installing the return spring 7 . The abutment holes 45 are arranged in pairs on the pressure plate 61 and the seat body 4 , and on the pressure plate 61 , the abutment holes 45 are evenly distributed to ensure that the force on the pressure plate 61 is even.

As shown in FIG. 6 and FIG. 7 , a limit rod 44 is installed on the inner wall of the accommodating chamber 41 , and a bar-shaped pin hole 63 matching with the limit rod 44 is opened on the pressing rod 62 . The limit rod 44 is used to limit the extrusion force of the compression rod 62 to the piezoelectric body 5, and the end of the limit rod 44 extending into the bar pin hole 63 is an enlarged part, so that the limit rod 44 will not break away from the bar pin The hole 63 also has a certain guiding effect on the pressing rod 62 .

It can be seen from Fig. 5 and Fig. 6 that the installation method of the limit rod 44 is as follows: a first seat hole 47 is opened on the side wall of the accommodating cavity 41, and a first seat hole 47 corresponding to the first seat hole 47 is provided on the limit rod 44. The second seat hole 48 fixes the limiting rod 44 to the seat body 4 by passing a screw between the first seat hole 47 and the second seat hole 48 .

As shown in FIG. 2 , the energy storage unit in this embodiment includes a diode, a capacitor, a switch, a DC voltage converter and a rechargeable battery that are sequentially connected in a circuit. The energy from the piezoelectric generating unit is temporarily stored in the capacitor through the diode. When the capacitor voltage reaches a certain value, the switch is turned on, the capacitor starts to discharge, and the rechargeable battery is charged through the DC voltage converter; when the capacitor is discharged, the voltage is lower than the set value When the switch is turned off, the capacitor starts to charge, and so on, the energy generated by the piezoelectric generating unit is stored in the rechargeable battery, which supplies energy for the control module, GPS positioning module and wireless communication module.

The wireless communication module includes a signal receiving communication unit, a terminal mobile communication data receiving and sending unit, a SIM card, an antenna 10 and the like. The signal receiving communication unit can choose GSM/GPRS, CDMA, Wi-Fi, Bluetooth, etc. As a preference, this embodiment chooses GSM/GPRS. It can be seen from Fig. 1 and Fig. 3 that a third seat hole 15 communicating with the first cavity 11 is opened on the side of the lower sole 1, and the antenna 10 is installed in the third seat hole 15.

As shown in FIG. 1 , an alarm switch 14 is also installed in the third seat hole 15 , and the alarm switch 14 is used to trigger the control module to control the GPS positioning module to locate and control the wireless communication module to send positioning signals.

When assembling, first fix the limit rod 44 in the accommodating cavity 41, abut the return spring 7 in the corresponding abutment hole 45 between the pressure plate 61 and the seat body 4, and fix the two ends of the return spring 7 on the into the abutment hole 45; the pressure rod 62 is disposed from the guide hole into the accommodation chamber 41, and the limit rod 44 on the inner wall of the accommodation chamber 41 is simultaneously embedded in the bar-shaped pin hole 63 of the pressure rod 62; the piezoelectric body 5 The fixed end 51 of the fixed end 51 is embedded in the strip-shaped embedded hole 42 of the base body 4, the suspended end 52 is embedded in the embedded groove 64 of the pressure rod 62, and screws are fixed to assemble the piezoelectric generating unit;

Then assemble the piezoelectric power generation unit and the energy storage unit into a power module, put it into the second cavity 12 of the lower shoe sole 1, and put the control module, GPS positioning module and wireless communication module into the first cavity 11 of the lower shoe sole 1 Inside, put the antenna 10 and the alarm switch 14 into the third seat hole 15;

Finally, the upper sole 9 is sewed or glued on the lower sole 1, and the upper 2 is fixed on the upper sole 9 through the slide fastener 3.

The working mode of the piezoelectric self-powered positioning shoes in this embodiment is as follows:

When the human body is walking, the pressure deformation area of the upper sole 9 is deformed under the action of human body gravity, and the pressure plate 61 in contact with the pressure deformation area generates a relative displacement relative to the piezoelectric body 5, driving the pressure bar 62 to squeeze the piezoelectric body. The suspended end 52 of the body 5, so that the piezoelectric body 5 bends and generates different charges on the two curved surfaces to form a potential difference, and the generated electric energy is output to the energy storage unit through the circuit for storage. In this way, during the process of walking, the piezoelectric body 5 continuously generates electricity and stores the generated electric energy in the energy storage unit, and the energy storage unit supplies power to the control module, the GPS positioning module and the wireless communication module respectively. The control module has two modes of software control and hardware control. Usually the whole system is in standby mode. When family members need to know the location of the wearer, they can send a query signal to the control module on the positioning shoe. The control module starts GPS positioning after receiving the signal. Module, transmits the obtained location information back to the interrogator through the antenna 10 of the wireless communication module, thereby informing the family of the shoe wearer's location; when the shoe wearer is in an emergency, he can trigger the alarm switch 14 himself, and the control module controls the GPS The positioning module obtains the position information and sends the position information to the interrogation machine held by the family or the police through the wireless communication module.

Claims (8)

1. A piezoelectric self-powered positioning shoe, comprising a sole and a vamp, a power module, a control module, a GPS positioning module and a wireless communication module are arranged in the sole, and the power module includes a piezoelectric power generation unit and an energy storage unit, which It is characterized in that the sole has a pressure deformation zone, and the piezoelectric generating unit includes: A pressing block that is in contact with the compression deformation zone; A piezoelectric body that is driven and deformed by the pressure block to generate electricity, the piezoelectric body is fixed in the sole and connected to the energy storage unit circuit; A seat body is installed in the sole, and an accommodation chamber is arranged in the seat body, and a strip-shaped embedding hole is opened on the side wall of the accommodation chamber, and the piezoelectric body includes a fixed end fixed in the strip-shaped embedding hole, And the free end in the accommodating cavity, the pressing block interacts with the free end. 2. The piezoelectric self-powered positioning shoe according to claim 1, wherein the piezoelectric body comprises an elastic plate, and a piezoelectric material layer is fixed on the outer surface of the elastic plate. 3. The piezoelectric self-powered positioning shoe according to claim 1, wherein the pressure block includes a pressure plate and a pressure rod fixed on the bottom surface of the pressure plate, and a guide hole is provided on the top surface of the seat body, so that The pressure rod extends into the accommodating cavity through the guide hole and interacts with the suspended end of the piezoelectric body, and a return spring abuts between the pressure plate and the top surface of the seat body; The pressure plate is in contact with the pressure deformation zone of the sole. 4 . The piezoelectric self-powered positioning shoe according to claim 3 , wherein an axial limiting member interacting with the pressing rod is provided in the accommodating cavity. 4 . 5. The piezoelectric self-powered positioning shoe according to claim 4, wherein the axial limiting member includes a limiting rod located on the inner wall of the accommodating cavity, and the pressing rod is provided with a Matching bar pin holes. 6. The piezoelectric self-powered positioning shoe according to claim 3, characterized in that, said pressing rod is provided with an embedding groove matching with the suspended end of the piezoelectric body. 7. The piezoelectric self-powered positioning shoe according to any one of claims 1 to 6, wherein an alarm switch is provided on the sole, and the alarm switch is used to trigger the control module to control the GPS positioning module to locate and control The wireless communication module sends a positioning signal. 8. The piezoelectric self-powered positioning shoe according to any one of claims 1 to 6, wherein the sole and the upper are connected and fixed by a zipper.