TWI635464B - Speed ??calculator for fall detection - Google Patents

Abstract

The invention relates to a speed calculator applied to fall detection, which is mainly used for calculating a curve area, and mainly comprises a square calculator, an analysis module, a comparator and a total calculator, wherein the square calculator calculates the area of the curve for one. The operation formula removes the root number, and operates on the area of the curve to generate a plurality of non-integer analysis values, and the analysis module defines a plurality of integer references to the analysis table and imports the non-integer analysis values, and then passes the comparators to the non-integer The integer analysis values are respectively compared to the integer reference and calculated into integer analysis values. Finally, the summation calculator is used to analyze the numerical values according to the integer corresponding to each of the integer references to obtain the curve area, thereby performing the integral operation energy of the present invention. Calculate the area of the curve in the simplest way.

Description

Speed calculator for fall detection

The invention relates to a speed calculator, in particular to a speed calculator applied to fall detection.

According to the aging of the population, social welfare is relatively more important. Therefore, in order to respond to this social phenomenon, the welfare, care and medical care of the elderly must be constantly adjusted. The older the older the body, the more obvious the degree of physical functioning, and the part of the body's muscle mass will be more degraded, especially in terms of the muscle strength of the leg. When the leg strength is insufficient, it is very easy to cause soft feet or fall. The situation, while older people who fall down is very likely to cause serious accidents such as fractures, thus accelerating the degree of aging. In view of this, a variety of fall detection systems and computing devices for assisting monitoring have been developed on the market.

However, the existing computing device must analyze the detected waveform values, but since the range of the waveform region is in an irregular state, the analyzed values have a number of digits after the decimal point, so The analysis values with the number of digits after the decimal point must be calculated. According to the traditional method of calculating the speed, the acceleration values ax, ay, and az measured by the three-axis accelerometer respectively correspond to the x-axis accelerometer. The axis, the y-axis, and the z-axis, the square acceleration value of the three-axis acceleration value is added to the root number to obtain the total acceleration value. . Then, after integrating the total acceleration value, v ( t )=ʃ a ( t ) dt , the velocity value is obtained, and the area included in the curve shown in the relationship between the total acceleration a and the time t is The integral result of the total acceleration versus time gives the velocity v. Because the traditional speed calculation method needs to perform the action of adding the root number to the acceleration value of the three axes first, to obtain the total acceleration value, the action of opening the root number increases the operation cost, and the action of integrating the total acceleration is also performed. It includes operations that accumulate floating-point numbers (for example, decimals, 0.03, 0.145, etc.), which also increases the computational cost. In addition, the formula for performing mathematical operations is calculated by the operation method of the root number, so it is inevitably increased in the overall operation time. If the calculation value is too large, it is easy to cause the crash or the judgment due to the long operation time. Inaccurate.

The invention provides a square calculator, an analysis module, a comparator and a summation calculator, which can calculate the curve area in the simplest way.

In order to achieve the above object, the present invention discloses a speed calculator applied to fall detection for calculating a curve area, which includes: a square calculator, which removes a root number from an operation formula for calculating the area of the curve, and Curve area operation to generate a plurality of non-integer analysis values; an analysis module, defining a plurality of integer references for an analysis table and importing the non-integer analysis values; a comparator, comparing the non-integer analysis values to each The integer reference is calculated into an integer analysis value; and a sum total calculator analyzes the value according to the integer corresponding to each of the integer references to obtain the curve area.

According to an embodiment of the present invention, wherein the operation formula is After the square calculator is operated to remove the root number to become The square calculation method.

According to an embodiment of the invention, the integer references of the analysis table are sufficient to cover a range of the area of the curve.

A speed calculator method of the present invention comprises the steps of: removing a root number from a calculation formula for calculating a curve area by using a square calculator, and calculating the area of the curve to generate a plurality of non-integer analysis values; and simultaneously transmitting an analysis module Defining a plurality of integer benchmarks for an analysis table, and guiding the non-integer analysis values obtained by the square calculator to calculate the area of the curve; comparing the non-integer analysis values by a comparator to the analysis table Each of the integer references is calculated into an integer analysis value; and an integer analysis calculator is used to obtain the curve area according to the integer analysis value corresponding to each integer reference in the analysis table.

According to an embodiment of the present invention, wherein the operation formula is After the square calculator is operated to remove the root number to become The square calculation method.

According to an embodiment of the invention, the integer references of the analysis table are sufficient to cover a range of the area of the curve.

1‧‧‧Speed Calculator

10‧‧‧ square calculator

12‧‧‧Analysis module

14‧‧‧ Comparator

16‧‧‧Additional calculator

2‧‧‧Analysis form

20‧‧‧ benchmark

200‧‧‧ first benchmark

201‧‧‧ second benchmark

202‧‧‧ third benchmark

203‧‧‧ fourth benchmark

22‧‧‧Non-integer analysis values

1 is a block diagram of a preferred embodiment of the present invention.

2 is a flow chart of a preferred embodiment of the present invention.

3 is a schematic diagram of a curved area chart in accordance with a preferred embodiment of the present invention.

The other embodiments of the present invention will be readily understood by those skilled in the art from this disclosure. The other embodiments of the present invention will be readily understood by those skilled in the art from this disclosure.

The structure, the proportions, the sizes, and the like of the present invention are only used to clarify the contents disclosed in the specification for the understanding and reading of those skilled in the art, and are not intended to limit the implementation of the present invention. The conditions are not technically meaningful, and any modification of the structure, change of the proportional relationship or adjustment of the size should remain in the present invention without affecting the effects and the achievable objectives of the present invention. The technical content revealed can be covered. In the meantime, the terms "a", "an", "the" and "the" are used in the description, and are not intended to limit the scope of the invention. Adjustments, where there is no material change, are considered to be within the scope of the invention.

Please refer to FIG. 1 , FIG. 2 and FIG. 3 , which are block diagrams, schematic flowcharts and schematic diagrams of curved area charts according to a preferred embodiment of the present invention. The invention relates to a speed calculator applied to fall detection for calculating a curve area. The speed calculator 1 mainly comprises a square calculator 10, an analysis module 12, a comparator 14 and an summation calculator 16, and a square calculator 10 The operation formula for calculating the area of the curve is removed, and the area of the curve is calculated to generate a complex non-integer analysis value, and the operation formula is , remove the root number to become The non-integer analysis value has the value after the decimal. The analysis module 12 defines a plurality of integer references 20 for an analysis table 2 (refer to FIG. 3) and imports the non-integer analysis values, and the comparator 14 compares the non-integer analysis values to the integer reference 20 and calculates The integer analysis value, the integer analysis value has no value after the decimal point, and finally the summation calculator 16 analyzes the value according to the integer corresponding to each of the integer reference 20 to obtain the curve area. The integer bases 20 of the analysis table 2 are sufficient to cover the range of the area of the curve.

The following steps can be known from the block diagram above. a. Using a square calculator, the root number is removed from the calculation formula for calculating the curve area, and the curve area is calculated to generate a complex non-integer analysis value; b. The analysis module defines a plurality of integer benchmarks for an analysis table, and imports the non-integer analysis values obtained by calculating the area of the curve by the square calculator; c. comparing the non-integer analysis values by a comparator Each of the integer references in the analysis table is calculated into an integer analysis value; and d, according to the integer analysis value corresponding to each integer reference in the analysis table, using a total calculator to obtain the curve area .

In the analysis table 2 in FIG. 3, it is seen that the integer reference 20 is divided into a first reference 200, a second reference 201, a third reference 202, and a fourth reference 203, and the calculation formula is expressed by the square calculator 10 of the present invention. After removing the root number, it becomes Therefore, the operation of the root number is reduced, thereby shortening the calculation time and complexity. Through All non-integer analysis values of the track area area can be quickly calculated, and the non-integer analysis values have several digits after the decimal point, so in order to speed up and simplify the operation, the non-integer analysis values are compared by the comparator 14. Compare to each integer reference 20 and calculate the value into an integer analysis. In this way, the value at the time of the operation is only an integer operation, and the number of digits after the decimal point is not required to be calculated. Finally, the total calculator 16 is in accordance with the analysis table 2. The area of the curved surface is obtained by the integer analysis value corresponding to each integer reference 20, whereby the curve area can be calculated in the simplest manner by the integral operation of the present invention. The integer reference 20 in this embodiment is only divided into four references, but the setting of the actual demand change reference.

The above embodiments are merely illustrative of the principles of the invention and its effects, and are not intended to limit the invention. Any of the above-described embodiments may be modified by those skilled in the art without departing from the spirit and scope of the invention. Therefore, the scope of protection of the present invention should be as listed in the scope of the patent application described later.

Claims (6)

A speed calculator for fall detection for calculating a curve area, comprising: a square calculator, which removes a root number from an operation formula for calculating the area of the curve, and operates the area of the curve to generate a complex non-integer Analyze the value; an analysis module defines a plurality of integer references for an analysis table and imports the non-integer analysis values; a comparator compares the non-integer analysis values to the integer reference and computes the integer analysis values And a total calculator that analyzes the value according to the integer corresponding to each of the integer references to obtain the area of the curve. The speed calculator applied to the fall detection as described in claim 1 of the patent application, wherein the calculation formula is After the square calculator is operated to remove the root number to become The square calculation method. The speed calculator for fall detection, as described in claim 1, wherein the integer bases of the analysis table are sufficient to cover the range of the curve area. A speed calculator method, the method comprising: removing a root number by using a square calculator on an operation formula for calculating a curve area, and calculating the area of the curve to generate a plurality of non-integer analysis values; and simultaneously The analysis table defines a plurality of integer benchmarks, and imports the non-integer analysis values obtained by calculating the area of the curve by the square calculator; and comparing the non-integer analysis values by a comparator to each of the analysis tables The integer base The quasi-parallel operation is performed into an integer analysis value; and according to the integer analysis value corresponding to each of the integer references in the analysis table, a total calculator is used to obtain the curve area. For example, the speed calculator method described in claim 4, wherein the operation formula is After the square calculator is operated to remove the root number to become The square calculation method. The speed calculator method of claim 4, wherein the integer bases of the analysis table are sufficient to cover a range of the curve area.