A portable fall detection sensor

Abstract

The present invention discloses a portable fall detection sensor, which comprises a shell, wherein a cross slot is arranged in the shell, wherein one end of four channels of the cross slot is respectively provided with an inner spring sheet, and the other end of the four channels of the cross slot is respectively provided with an outer spring sheet, wherein a steel ball is arranged in the cross slot, and the steel ball is located at the center of the four groups of inner spring sheets; the steel ball is selected to contact the spring sheet in cooperation with a single-chip microcomputer for detection, so that the price can be effectively reduced, a large amount of cost and resources can be saved, and at the same time, the error can be reduced, and the detection speed, accuracy and reliability can be effectively improved, so that after the wearer falls, the guardian can be informed of the wearer's condition in a timely and effective manner to provide assistance.

Description

Technical Field

[0001] The present invention is applied to the field of sensors, and in particular is a portable fall detection sensor. Background Art

[0002] With the rapid development of human society, many young people have to go to different places for work or business trips, so they cannot observe the living conditions and physical conditions of the elderly at home very well, which makes the status of remote monitoring technology for the elderly's life continue to improve. The problem that most elderly people face is that their hands and feet are inconvenient and their movements are not smooth, which makes them prone to falling due to temporary cramps or numbness when walking, and they cannot let their family members know about their fall in the first time, which makes many young people headache. At present, fall detection sensor technology mainly judges the current state of the human body through speed, acceleration, and tilt angle. Most of the existing technologies have high prices for acceleration sensors, which makes it impossible for many contemporary young people to buy and use similar products. Summary of the invention

[0003] The technical problem to be solved by the present invention is to provide a portable fall detection sensor so that family members of an elderly person who is not under real-time care can be informed in real time and effectively after the elderly person falls.

[0004] In order to solve the above technical problems, a portable fall detection sensor of the present invention comprises a housing, a cross slot is arranged in the housing, an inner spring sheet is arranged at one end of four channels of the cross slot, and an outer spring sheet is arranged at the other end of the four channels of the cross slot, a steel ball is arranged in the cross slot, and the steel ball is located in the center of the four groups of inner spring sheets;

[0005] The inner spring sheet comprises a left inner spring sheet and a right inner spring sheet which are arranged in a mirror image, and the left inner spring sheet and the right inner spring sheet are both connected to an external single-chip computer through a single wire;

[0006] The outer spring piece comprises a left outer spring piece and a right outer spring piece which are arranged in a mirror image, and both the left outer spring piece and the right outer spring piece are connected to an external single-chip computer via a single wire.

[0007] Furthermore, when the steel ball contacts the inner spring sheet, the left inner spring sheet, the steel ball, the right inner spring sheet and the external single-chip computer form a passage; when the steel ball is impacted and passes through the inner spring sheet to contact the outer spring sheet, the left outer spring sheet, the steel ball, the right outer spring sheet and the external single-chip computer form a passage.

[0008] Furthermore, the shell is made by buckling a lower shell and an upper shell, and the lower shell and the upper shell are fixed by a buckle.

[0009] Furthermore, a hook is fixedly connected to the outer wall of the lower shell.

[0010] Furthermore, a protective resistor is provided on the wire used to connect the left inner spring sheet and the right inner spring sheet to the external single chip computer.

[0011] Furthermore, the external single chip microcomputer is connected to an external indicator light.

[0012] The present invention adopts the above technical solution and has the following beneficial effects:

[0013] By using the contact method of steel balls and spring sheets in conjunction with a single-chip microcomputer for detection, the price can be effectively reduced, a large amount of cost and resources can be saved, while reducing errors, and effectively improving detection speed, accuracy and reliability, so that the guardian can be aware of the wearer's condition in a timely and effective manner and provide assistance after the wearer falls. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] The present invention is further described in detail below with reference to the accompanying drawings and specific embodiments:

[0015] Figure 1 It is a schematic diagram of the structure of the present invention;

[0016] Figure 2 It is a side view of the structure of the present invention;

[0017] Figure 3 It is a schematic diagram of the steel ball passing through the inner spring sheet after the wearer of the present invention falls down;

[0018] Figure 4 This is the control principle diagram of the present invention. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical solution and advantages of the embodiments of the present invention more clear, the technical solution in the embodiments of the present invention will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of the present invention.

[0020] like Figure 1-3As shown, the present invention provides a portable fall detection sensor, which includes a shell 1, which is made by buckling a lower shell 101 and an upper shell 102, and the lower shell 101 and the upper shell 102 are fixed by a buckle, so that after a fall is detected, the lower shell 101 can be disassembled to reset the steel ball; the outer wall of the lower shell 101 is fixedly connected with a hanging buckle 6 for the user to wear, and a cross groove 2 is arranged in the shell 1, and one end of the four channels of the cross groove 2 is provided with an inner spring sheet 3, and the other end of the four channels of the cross groove 2 is provided with an inner spring sheet 3. The ends are all provided with outer spring pieces 4, the cross slot 2 is provided with a steel ball 5, and the steel ball 5 is located in the center of the four groups of inner spring pieces 3; the inner spring piece 3 includes a left inner spring piece 31 and a right inner spring piece 32 set in a mirror image, and the left inner spring piece 31 and the right inner spring piece 32 are both connected to the external single-chip computer through a single wire; the outer spring piece 4 includes a left outer spring piece 41 and a right outer spring piece 42 set in a mirror image, and the left outer spring piece 41 and the right outer spring piece 42 are both connected to the external single-chip computer through a single wire. When the steel ball 5 contacts the inner spring piece 3, the left inner spring piece 31, the steel ball 5, the right inner spring piece 32 and the external single-chip computer form a passage; when the steel ball 5 is impacted and passes through the inner spring piece 3 and contacts the outer spring piece 4, the left outer spring piece 41, the steel ball 5, the right outer spring piece 42 and the external single-chip computer form a passage. A protective resistor is provided on the wire used to connect the left inner spring piece 31 and the right inner spring piece 32 to the external single-chip computer. The external single-chip microcomputer is connected to the external indicator light and other prompting devices. The external single-chip microcomputer and the external indicator light or alarm and other prompting devices are all existing devices, and their operation methods, connection methods and control methods are common knowledge of those skilled in the art, so they will not be elaborated. The single-chip microcomputer can also use the newer Arduino, which is the product of the secondary development of the single-chip microcomputer and uses the AVR single-chip microcomputer as the core. During use, there is almost no need to consider the hardware part, which is convenient and fast; the external indicator light can be connected with multiple groups of indicator lights of model XVBC2M5.

[0021] The mass of the steel ball 5 is M, the stiffness coefficient of the inner spring leaf 3 is Ka, the stiffness coefficient of the outer spring leaf 4 is Kb, the acceleration of gravity is g, the deformation of the spring leaf is L, and the angles in the spring leaf group are all 120°, so that when the steel ball 5 is subjected to force, the three forces are balanced, Mg=KadL. When a person falls, the acceleration generated is equal to the acceleration of gravity. According to Newton's second law, the force that the steel ball 5 can generate on the spring leaf is about 2Mg. Therefore, the design size of Ka is best at 1.6-1.8Mg / dL, and the design size of Kb should be much larger than 2Mg / dL.

[0022] When in use, the user wears the device on the body using the hanging buckle 6. When the user is in normal activities, the steel ball 5 is located in the center of the four groups of inner spring sheets 3. When the steel ball 5 contacts a group of left inner spring sheets 31 and right inner spring sheets 32 at the same time, the left inner spring sheet 31, the steel ball 5, the right inner spring sheet 32 ​​and the external single-chip computer form a path. At this time, the external single-chip computer is powered on and sends a signal to the external indicator light connected to it to control it to display a safe color light to turn on and light up to indicate that the wearer has not fallen. When the user falls, the steel ball 5 impacts through the inner spring sheet 3 and contacts the outer spring sheet 4, and the left outer spring sheet 41, the steel ball 5, the right outer spring sheet 42 and the external single-chip computer form a path. At this time, the external single-chip computer is powered on and sends a signal to the external indicator light connected to it to control it to display a dangerous color light to turn on and light up to indicate that the wearer has fallen.

[0023] The above are embodiments of the present invention. For ordinary technicians in the field, according to the teachings of the present invention, all equivalent changes, modifications, substitutions and variations made within the scope of the patent application of the present invention without departing from the principles and spirit of the present invention should fall within the scope of the present invention.

Claims

1. A portable fall detection sensor, Features: It comprises a housing (1), wherein a cross slot (2) is arranged in the housing (1), an inner spring sheet (3) is arranged at one end of four channels of the cross slot (2), and an outer spring sheet (4) is arranged at the other end of the four channels of the cross slot (2), a steel ball (5) is arranged in the cross slot (2), and the steel ball (5) is located in the center of the four groups of inner spring sheets (3); The inner spring sheet (3) comprises a left inner spring sheet (31) and a right inner spring sheet (32) which are arranged in a mirror image, and the left inner spring sheet (31) and the right inner spring sheet (32) are both connected to an external single-chip computer via a single wire; The outer spring sheet (4) comprises a left outer spring sheet (41) and a right outer spring sheet (42) which are arranged in a mirror image, and the left outer spring sheet (41) and the right outer spring sheet (42) are both connected to an external single-chip computer via a single wire; The angles within the spring sheet groups are all 120°. When the user is in normal activity, the steel ball (5) is located at the center of the four groups of inner spring sheets (3). When the steel ball (5) contacts a group of left inner spring sheets (31) and right inner spring sheets (32) at the same time, the left inner spring sheet (31), the steel ball (5), the right inner spring sheet (32) and the external single chip computer form a path. The external single chip computer is powered on and sends a signal to an external indicator light connected thereto to control the external indicator light to turn on and emit a safe color light to indicate that the wearer has not fallen. When the user falls, the steel ball (5) impacts and passes through the inner spring sheets (3) to contact the outer spring sheets (4). The left outer spring sheet (41), the steel ball (5), the right outer spring sheet (42) and the external single chip computer form a path. The external single chip computer is powered on and sends a signal to an external indicator light connected thereto to control the external indicator light to turn on and emit a dangerous color light to indicate that the wearer has fallen.

2. A portable fall detection sensor according to claim 1, Features: The housing (1) is made by buckling a lower housing (101) and an upper housing (102), and the lower housing (101) and the upper housing (102) are fixed by means of a buckle.

3. A portable fall detection sensor according to claim 2, Features: A hanging buckle (6) is fixedly connected to the outer wall of the lower shell (101).

4. A portable fall detection sensor according to claim 1, Features: A protective resistor is provided on the wires connecting the left inner spring piece (31) and the right inner spring piece (32) to the external single-chip computer.

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