JP2002102185A - Pulsimeter - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a pulsimeter in which various noise components are removed. SOLUTION: A pulse width stably detecting means 14 evaluates an object pulse width Px based on a pulse width evaluation range having plural steps prepared according to differences from a reference pulse width P, and performs process operations for the pulse width Px by one of the following operations corresponding to the pulse interval evaluation range: update or non-update of the reference pulse width data, interpolation of pulse data for one beat and discarding of the object pulse width data. A pulse interval stably detecting means 15 evaluates an object pulse interval Rx based on a pulse interval evaluation range having plural steps prepared according to differences from a reference pulse interval R, and performs process operations for the pulse interval Rx by one of the following operations corresponding to the pulse interval evaluation range: update or non-update of the reference pulse interval data, delection of pulse data for one beat, iterpolation of pulse data for one beat and discarding of the object pulse width data.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pulsimeter for measuring a pulse by wearing it on a part of a body, and more particularly to a pulsimeter capable of removing noise and obtaining an accurate pulse rate.

[0002]

2. Description of the Related Art As a conventional technique for removing noise from a pulse monitor, a noise signal detected by a body motion sensor is extracted from a mixed signal containing a pulse wave component and a noise component detected by a pulse wave sensor. A technique is disclosed in which only the pulse wave signal is extracted and only the pulse wave signal is extracted to obtain a pulse rate (see Japanese Patent Application Laid-Open No. Hei 7-227383).

[0003]

The state and state of occurrence of noise, such as its cause, time, and interval, vary. The above-mentioned technology removes only noise components caused by body movement caused by changes in blood volume in the blood when the body moves, and removes only specific noise components from various noise components. There was a problem that can not be done.

Accordingly, an object of the present invention is to solve the above-mentioned conventional problems, and an object of the present invention is to provide a pulsimeter for removing various noise components.

[0005]

In order to achieve the above object, a pulse meter according to the present invention evaluates a target pulse width based on a pulse width evaluation range in a pulse meter for measuring a body pulse. A pulse width stability detection unit that performs a processing operation of the target pulse width corresponding to the range, and a stage subsequent to the pulse width stability detection unit, evaluates a target pulse interval based on a pulse interval evaluation range, and And a pulse interval stability detecting means for performing a corresponding processing operation of the target pulse interval. According to this, only a signal recognized as a legitimate pulse width signal is extracted and transmitted to the subsequent stage, and only a signal recognized as a legitimate pulse pulse interval signal is extracted. A noise signal other than a pulse signal can be removed from both sides of a certain pulse width and a certain pulse interval.

Further, the pulse width evaluation range is a range of a plurality of steps set according to a difference from the reference pulse width, and the processing operation of the target pulse width includes updating the reference pulse width data, The pulse data is not updated, the pulse data for one beat is complemented, or the target pulse width data is discarded, and the pulse interval evaluation range is set in a plurality of steps set according to the difference from the reference pulse interval. The processing operation of the target pulse interval includes updating the reference pulse interval data, not updating the reference pulse interval data, deleting one pulse of pulse data, complementing one pulse of pulse data,
It is one of discarding the target pulse interval data. According to this, only the signal having a small pulse pulse width error influence and recognized as a normal signal is extracted and transmitted to the subsequent stage, and only the signal having a small pulse pulse error error influence and recognized as a normal signal is extracted. It is possible to extract and remove noise signals other than pulse signals from both the pulse width and the pulse interval, which are parameters more influenced by noise.

[0007] Further, a pulse rate comparing / evaluating means for comparing a target pulse rate with a reference pulse rate and evaluating a difference between the target pulse rate and the reference pulse rate is provided downstream of the pulse interval stability detecting means. It is characterized by. According to this, the target pulse rate, which is an abnormal change with respect to the reference pulse rate, is detected, and the noise removal omission in the pulse width stability detection means and the pulse interval stability detection means can be prevented.

The pulse rate comparison / evaluation means narrows the comparison / evaluation range with the reference pulse rate when the target pulse rate is large, and decreases the comparison / evaluation range with the reference pulse rate when the target pulse rate is small. It is characterized by widening. according to this,
Since the evaluation of the relationship between the target pulse rate and the reference pulse rate is weighted, the target pulse rate, which is an abnormal change with respect to the reference pulse rate, is captured. It is possible to further prevent the noise from being removed from the detection unit.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. First, the configuration of the pulse meter of the present invention will be described in detail with reference to FIGS.

FIG. 1 is an external view showing an example of a pulse meter according to the present invention. The pulsimeter according to the present invention includes a portable device main body 1,
The apparatus includes a sensor unit 2 that is attached to a detection site of the body and detects a change amount of a blood flow by a photoelectric method, a piezoelectric method, or the like, and a lead wire 3 that connects the main body 1 to the sensor unit 2. Device body 1
Is provided with an input unit 4 composed of switches for turning on power, switching display modes, setting time, and the like, and a display unit 5 for displaying measurement results and the like.

FIG. 2 is an electric block diagram of the pulse meter of the present invention. Sensor drive circuit 6 for driving sensor unit 2
And an amplification circuit 7 for amplifying a pulse signal from the sensor unit 2
A filter circuit 8 for removing electrical noise from the pulse signal output from the amplifier circuit 7, and an A / D converter for converting an analog signal output from the filter circuit 8 into a digital pulse signal A circuit 9 is provided.
The pulse signal from the / D conversion circuit 9 is used to control the operation of the CP
It is taken in by U13. And this CPU 13
A pulse width stability detection means 14 for stably detecting the pulse width of the pulse signal from the / D conversion circuit 9, a pulse interval stability detection means 15 for stably detecting the pulse interval of the pulse signal from the pulse width stability detection means 14, A pulse rate comparing and evaluating means 16 for comparing and evaluating the pulse signal from the pulse interval stability detecting means 15 as a pulse rate. The result after the pulse rate comparison and evaluation means 16 is displayed through the display drive circuit 12 that drives the display unit 5. In addition, a storage device 10 for storing various data such as a pulse width evaluation range and a pulse interval evaluation range which are necessary in the pulse width stability detection and the pulse interval stability detection, and The power supply device 11 for supplying power is connected to and controlled by the CPU 13 to constitute the whole.

Next, the operation processing of the pulse meter according to the present invention will be described in detail with reference to FIGS. The pulse meter according to the present embodiment is not only provided with a function of removing noise, but also capable of displaying a pulse rate, a clock display, a calorie consumption display, and a fat burning amount display.

FIG. 3 is a flowchart showing the overall processing procedure. First, when the power input unit 4 is turned on, the CPU 13 is initialized (step S1), and the current time is displayed on the display unit 5 (step S2). Here, when changing the time, the input unit 4 for setting is turned on without turning on the input unit 4 for switching (step S3) (step S10). Then, the time is set by the input unit 4 for selection (step S11). When the input unit 4 for setting is turned on again, the time setting is determined, and the mode returns to the clock display mode (step S12).

In the clock display mode (step S2), when the switching input unit 4 is turned on (step S3),
The process proceeds to the consumed calorie display mode, and the calorie consumed by the measurement is displayed (step S4). Here, when inputting or changing the condition setting, the input unit 4 for setting is turned on without turning on the input unit 4 for switching (step S5) (step S13). Then, personal conditions such as gender, age, and weight are input through the input unit 4 for selection (step S14). When the input unit 4 for setting is turned on again, the condition setting is determined, and the mode returns to the calorie display mode (step S1).
5).

In the calorie display mode (step S4), when the input unit 4 for switching is turned on (step S4).
5) The process proceeds to the fat burning amount display mode, and the burned fat amount is displayed by measurement (step S6).

In the fat burning amount display mode (step S6), when the input unit 4 for switching is turned on (step S6).
7) The process proceeds to the pulse display mode, and the measured pulse rate is displayed (step S8). When the input unit 4 for switching is turned on in the pulse display mode, the mode returns to the clock display mode (step S9).

Next, a subroutine of the pulse display mode (step S8) in FIG. 3 will be described in detail with reference to FIG. FIG. 4 is a flowchart showing a processing procedure in the pulse display mode. When the input unit 4 for measurement is turned on (step S21) in the pulse display mode (step S8) in FIG. 3, the pulse rate when the subject is at rest, that is, in a normal state where no load such as exercise is applied to the body. Is measured (step S2).
2) The resting pulse rate is displayed on the display unit 5 (step S).
23). Then, the CPU 13 stores the reference pulse width P, the reference pulse interval R, and the reference pulse rate HR0 from the pulse pulse detected at rest in the storage device 10 (step S24).

When the subject moves during exercise, that is, when the subject moves to an unusual state in which a load such as exercise is applied to the body,
When the input unit 4 for measurement is turned on again (step S2
5) The pulse rate during exercise is measured (step S26), and the pulse rate during exercise is displayed on the display unit 5 (step S27).
When the display is switched to the calorie display mode (step S4) or the fat burning amount display mode (step S6) in FIG. 3, for example, the consumed calories displayed as shown in the display example in FIG. 10 or the display example in FIG. Is calculated (step S28). Here, when the input unit 4 for further measurement is turned on (step S2).
9), exit this subroutine.

Next, the subroutine for measuring the pulse rate during exercise (step S26) in FIG. 4 will be described in detail with reference to FIG. FIG. 5 is a flowchart showing a processing procedure of pulse rate measurement during exercise. First, a pulse pulse during exercise is detected (step S31).

The pulse width during exercise, that is, the target pulse width is evaluated based on the pulse width evaluation range stored in the storage device 10 in advance, and the processing operation of the target pulse width corresponding to the pulse width evaluation range is performed. Then, pulse width stability detection processing for obtaining a stable pulse width is performed by the pulse width stability detection means 14 (step S32). If the evaluation of the pulse width stability detection processing is not in the normal range (step S33), an error mark 21 as shown in the display example of the error mark in FIG. 12 is displayed on the display unit 5 (step S33).
42), the process returns to the pulse detection (step S31), and the subsequent processing is repeated.

If the evaluation of the pulse width stability detection processing is within the normal range (step S33), the pulse rate is calculated from the pulse interval time, and it is determined whether the pulse rate is within the normal range of the human pulse rate. (Step S34). And
If the result of this determination is not within the normal range (step S35)
In step S43, an error mark as shown in the display example of the error mark in FIG. 13 is displayed on the display unit 5 (step S43). If no pulse is detected thereafter, the display of the error mark is repeated (step S44). If a pulse pulse is subsequently detected, the pulse width is stably detected (step S32).
And the subsequent processing is repeated (step S44).

If the pulse rate calculated from the pulse interval time is within the normal range (step S35), the storage device 10
Based on the pulse interval evaluation range stored in advance, the pulse interval during exercise, that is, the target pulse interval is evaluated, the target pulse interval corresponding to the pulse interval evaluation range is processed, and the stable pulse interval is determined. The obtained pulse interval stability detection processing is performed by the pulse width stability detection means 15 (step S36). If the evaluation of the pulse interval stability detection processing is not in the normal range (step S37),
An error mark as shown in the display example of the error mark in FIG. 12 is displayed on the display unit 5 (step S42), the process returns to the pulse detection (step S31), and the subsequent processing is repeated.

If the evaluation of the pulse interval stability detection processing is within the normal range (step S37), the target pulse rate HR1 is calculated from the data after the pulse interval stability detection, and stored in the storage device 10 (step S38). Then, the target pulse rate HR1 is compared with the reference pulse rate HR0, and the pulse rate comparison / evaluation unit 16 determines whether the target pulse rate HR1 is within the normal range (step S39).

If the result of comparison between the target pulse rate HR1 and the reference pulse rate HR0 is not within the normal range (step S40)
In step S45, the pulse rate HR0 ± X including the evaluation range is rewritten as the target pulse rate HR1 (step S45). / Maximum pulse rate to 220
It is determined whether it is within the range of beats / minute. If it is out of the normal range, the process proceeds to display an error mark (step S43) (step S46).

The target pulse rate HR1 and the reference pulse rate HR
If the result of the comparison with 0 is within the normal range (step S
40) If the target pulse rate HR1 rewritten to the pulse rate HR0 ± X including the evaluation range is within the normal range of the normal human pulse rate (step S46), the target pulse rate HR
1 is stored in the reference pulse rate HR0 (step S41),
Exit this subroutine.

Next, the subroutine of the pulse width stability detection (step S32) in FIG. 5 will be described in detail with reference to FIG. FIG. 6 is a flowchart showing a processing procedure of the pulse width stability detection. First, the detected pulse width is stored as a target pulse width Px (step S51).

Next, the target pulse width Px is compared with the reference pulse width P to determine whether or not the pulse width evaluation range Px <0.25P stored in the storage device 10 in advance (step S52). If the pulse width evaluation range Px <0.25P, the pulse width Px is determined to be outside the normal range, the target pulse width Px data is discarded (step S59), and the process exits this subroutine.

If the pulse width evaluation range Px <0.25P is not satisfied, the pulse width evaluation range 0.25P ≦ Px <0.7
It is determined whether it is 5P (step S53). If the pulse width evaluation range is 0.25P ≦ Px <0.75P, the target pulse width Px is determined to be within the normal range (step S61), and the process exits this subroutine.

Pulse width evaluation range 0.25P ≦ Px <0.
If it is not 75P, the pulse width evaluation range 0.75P ≦
It is determined whether Px <1.25P (step S5).
4). Then, the pulse width evaluation range 0.75P ≦ Px <
If it is 1.25P, the data is updated to the reference pulse width P including the target pulse width Px by moving average (step S60), and it is determined that the data is within the normal range (step S60).
61), exit this subroutine. The reason why the reference pulse width P is updated is that an error occurs if the pulse width changes according to the magnitude of the pulse pressure, and if the pulse width is not updated and a constant value is set.

Pulse width evaluation range 0.75P ≦ Px <1.
If it is not 25P, the pulse width evaluation range is 1.25P ≦
It is determined whether Px <2P (step S55).
If the pulse width evaluation range 1.25P ≦ Px <2P, the target pulse width Px is determined to be within the normal range (step S61), and the process exits this subroutine.

Pulse width evaluation range 1.25P ≦ Px <2P
If not, it is determined whether the pulse width evaluation range 2P ≦ Px <3P (step S56). If the pulse width evaluation range is not 2P ≦ Px <3P, 3P ≦
Px is determined (step S57), further out of the normal range, and the target pulse width Px data is discarded (step S5).
8), exit this subroutine.

When the pulse width evaluation range 2P ≦ Px <3P, as shown in FIG. 14, the pulse data for one beat is divided by dividing the target pulse width Px by the width reduced by the reference pulse width P. Complement and set the pulse interval at this time to R
x1 and Rx2 (step S62).

Then, the pulse interval Rx1 at this time is compared with the reference pulse interval R, and a pulse interval evaluation range 0.5R ≦
If Rx1 <1.5R is not satisfied (step S63),
It is determined that it is outside the normal range (step S58), and the process exits this subroutine. Also, the pulse interval evaluation range 0.75R ≦
If Rx1 <1.25R (step S63), the pulse rate is calculated, the display is updated, and displayed on the display unit 5 (step S64). In addition, the pulse interval evaluation range 0.
5R ≦ Rx1 <0.75R and 1.25R ≦ Rx1 <
If it is 1.5R (step S63), the pulse rate is calculated and the display is not updated (step S64).

Thereafter, the pulse interval Rx2 is compared with the reference pulse interval R, and a pulse interval evaluation range 0.5R ≦ Rx1 <
If it is not 1.5R (step S65), it is determined to be outside the normal range (step S58), and the process exits this subroutine. Also, the pulse interval evaluation range 0.5R ≦ Rx1 <
If it is 1.5R (step S65), it is determined that it is within the normal range (step S66), and the process exits this subroutine.

Next, the subroutine of the pulse interval time evaluation (step S34) in FIG. 5 will be described in detail with reference to FIG. FIG. 7 is a flowchart showing a processing procedure for evaluating the pulse interval time. If the pulse width is within the normal range (step S33) in the pulse width stability detection (step S32), the time α of the target pulse interval is stored in the storage device 10 (step S71). Then, it is determined whether or not the target pulse interval time α at this time is smaller than a time corresponding to a pulse rate of 40 beats / minute (step S7).
2) If the time is not shorter than the time corresponding to the pulse rate of 40 beats / minute, the target pulse interval time α is determined to be outside the normal range (step S75), and the process exits this subroutine.

If it is shorter than the time corresponding to the pulse rate of 40 beats / minute, the target pulse interval time α is
It is determined whether the time is longer than the time corresponding to 0 beats / minute (step S73). If the time is not longer than the time corresponding to 220 beats / minute, the target pulse interval time α is determined to be outside the normal range. A determination is made (step S75), and the process exits this subroutine. If the time is longer than the time corresponding to the pulse rate of 220 beats / minute, the target pulse interval time α is determined to be within the normal range (step S74), and the process exits this subroutine.

Next, the subroutine of the pulse interval stabilization detection (step S36) in FIG. 5 will be described in detail with reference to FIG. FIG. 8 is a flowchart showing a processing procedure of pulse pulse interval stability detection. First, the target pulse interval R
x is stored in memory (step S81).

The target pulse interval Rx is compared with the reference pulse interval R to determine whether or not the pulse interval evaluation range Rx <0.25R stored in the storage device 10 in advance (step S82). When the pulse interval evaluation range Rx <0.25R, the target pulse interval R
It is determined that x is a measurement error (step S90), further out of the normal range, the target pulse interval Rx data is discarded (step S89), and the process exits this subroutine.

If the pulse interval evaluation range Rx <0.25R is not satisfied, the pulse interval evaluation range 0.25R ≦ Rx <
It is determined whether it is 0.5R (step S83). Then, when the pulse interval evaluation range is 0.25R ≦ Rx <0.5R, it is determined whether or not one beat is deleted for the second consecutive time (step S91). If not, as shown in FIG. , The pulse data 22 for one beat is deleted, and the pulse interval Rx ′ is set (step S93).

Then, the pulse interval Rx ′ after deleting the pulse data for one beat is replaced with Rx, and it is determined whether the pulse interval evaluation range 0.5R ≦ Rx <1.5R,
If the pulse interval evaluation range is not 0.5R ≦ Rx <1.5R, the process exits this subroutine. If the pulse interval evaluation range is 0.5R ≦ Rx <1.5R, the process proceeds to step S97 (step S94). On the other hand, it is determined whether the deletion of one beat corresponds to the second consecutive time (step S9).
1) If applicable, the pulse interval R including the evaluation range
Step S9 rewrites the target pulse interval Rx to ± 3%.
Go to Step 7 (Step S92).

Pulse interval evaluation range 0.25R ≦ Rx <
If it is not 0.5R (step S83), it is determined whether the pulse interval evaluation range 0.5R ≦ Rx <0.75R (step S84). When the pulse interval evaluation range is 0.5R ≦ Rx <0.75R, the process proceeds to step S97.

Pulse interval evaluation range 0.5R ≦ Rx <0.
If not 75R, pulse interval evaluation range 0.75R
It is determined whether ≦ Rx <0.1.25R (step S85). And the pulse interval evaluation range 0.75R ≦ R
If x <0.1.25R, the reference pulse interval R including the target pulse interval Rx is updated by the moving average (step S95), and the display can be updated (step S96). The process proceeds to step S97. The reason for updating the reference pulse interval R is that the interval between heartbeats is constantly changing and is not a constant interval, and therefore, if a constant value is used without updating, an error occurs.

Pulse interval evaluation range 0.75R ≦ Rx <
If not 1.25R, the pulse interval evaluation range 1.2
It is determined whether 5R ≦ Rx <1.5R (step S
86). Then, the pulse interval evaluation range 1.25R ≦ Rx
If <1.5R, the process proceeds to step S97.

In step S97, the target pulse interval Rx
Is determined to be in the normal range, and the target pulse interval Rx is stored in the storage device 1.
0 is stored in the memory (step S100), and the process exits this subroutine.

Pulse interval evaluation range 1.25R ≦ Rx <
If not 1.5R, pulse interval evaluation range 1.5R
It is determined whether ≦ Rx <2.25R (step S8)
7). And the pulse interval evaluation range 1.5R ≦ Rx <
If it is 2.25R, it is determined whether the one-beat complement is the second consecutive time (step S98). If it is not, the reference pulse interval R is substituted into the target pulse interval Rx, so that one beat is obtained. The pulse data is complemented, the target pulse interval Rx is determined to be within the normal range (step S99), and the target pulse interval Rx is stored in the storage device 10 (step S1).
00), exit this subroutine. If you win
It is determined that the target pulse pulse interval Rx is outside the normal range (step S89), and the process exits this subroutine.

Pulse interval evaluation range 1.5R ≦ Rx <2.
If it is not 25R, 2.25R ≦ Rx, it is determined that a measurement error has occurred (step S88), the target pulse interval Rx is determined to be outside the normal range, and the target pulse interval Rx data is discarded (step S89). Through.

Next, a subroutine for comparing the target pulse rate HR1 with the reference pulse rate HR0 (step S39) in FIG. 5 will be described in detail with reference to FIG. FIG. 9 is a flowchart illustrating a processing procedure for comparing and evaluating the target pulse rate and the reference pulse rate. First, it is determined whether the target pulse rate HR1 is less than 80 beats / minute (step S111).
If less than minute, the evaluation range X based on the reference pulse rate HR0 is set to 5% (step S113). On the other hand, if it is not less than 80 beats / minute, the target pulse rate HR1
Is not less than 80 beats / min and less than 140 beats / min (step S112), and if it is not less than 80 beats / min and less than 140 beats / min, the evaluation range X based on the reference pulse rate HR0 is determined. Is set to 3% (step S114). Also,
If not more than 80 beats / min and less than 140 beats / min, the evaluation range X based on the reference pulse rate HR0 is set to 2% (step S115).

Thereafter, the target pulse rate HR1 is changed to the reference pulse rate H
It is compared whether it is smaller than R0 (step S116).
If the target pulse rate HR1 is smaller than the reference pulse rate HR0, it is determined whether or not the comparative evaluation range HR0−X ≦ HR1 <HR0 (step S117), and the comparative evaluation range HR0 is determined.
If -X ≦ HR1 <HR0, the target pulse rate HR
1 is determined to be within the normal range (step S119), and the process exits this subroutine. On the other hand, the comparative evaluation range HR0-X ≦
If HR1 <HR0, the target pulse rate HR1 is determined to be outside the normal range (step S120), and the process exits this subroutine.

The target pulse rate HR1 is equal to the reference pulse rate HR.
If not smaller than 0, the comparative evaluation range HR0 ≦ H
It is determined whether R1 <HR0 + X (step S11)
8) If the comparison evaluation range HR0 ≦ HR1 <HR0 + X, the target pulse rate HR1 is determined to be within the normal range (step S121), and the process exits this subroutine. on the other hand,
If the comparison evaluation range HR0 ≦ HR1 <HR0 + X, the target pulse rate HR1 is determined to be outside the normal range (step S120), and the process exits this subroutine.

As described above, in the pulse width stability detecting means 14, the pulse width evaluation range Px <
0.25P, 0.25P ≦ Px <0.75P, 0.75
P ≦ Px <1.25P, 1.25P ≦ Px <2P, 3P
The target pulse width Px is evaluated based on ≦ Px, and based on the result, the reference pulse width P is updated, the reference pulse width P is not updated, the pulse data for one beat is complemented, and the target pulse width P
By performing a multifaceted processing operation such as discarding the x data, it is possible to extract only a signal recognized as a legitimate pulse width pulse signal and transmit it to the subsequent stage.

In the pulse interval stability detecting means 15, the pulse interval evaluation range Rx <0.25R of a plurality of stages
0.25R ≦ Rx <0.5R, 0.5R ≦ Rx <0.7
5R, 0.75R ≦ Rx <1.25R, 1.25R ≦ R
x <1.5R, 1.5R ≦ Rx <2.25R, 2.25
The target pulse interval Rx is evaluated based on R ≦ Rx, and based on the result, the reference pulse interval R is updated, the reference pulse interval R is not updated, pulse data for one beat is deleted, pulse data for one beat , And discarding the target pulse interval Rx data, it is possible to extract only a signal recognized as a normal pulse interval pulse signal.

Therefore, the pulse meter according to the embodiment of the present invention can remove noise signals other than pulse signals from both the pulse width and the pulse interval, which are parameters affected by noise.

Further, the pulse rate comparison and evaluation means 16
Target pulse rate HR1 is less than 80 beats / minute, 80 beats / minute or more 1
The evaluation range based on the reference pulse rate HR0 is 5% corresponding to each case of less than 40 beats / min and 140 beats / min or more,
By performing the weighted evaluation as 3% and 2%, the target pulse rate which is an abnormal change with respect to the reference pulse rate HR0 is captured, and the pulse width stability detection means 14 and the pulse interval stability detection means 15 Noise can be prevented.

[0054]

As described above, the pulse meter according to the present invention uses the pulse width stability detecting means and the pulse interval stability detecting means to measure the pulse signal from both the pulse width and the pulse interval, which are parameters influenced by noise. Since noise signals other than the above are removed, accurate measurement can be performed in response to various types of noise. Further, the pulse rate comparison and evaluation means prevents the noise from being removed by the pulse width stability detection means and the pulse interval stability detection means, so that more accurate measurement can be performed in response to more various noises. In addition, the calorie consumption and the fat burning amount calculated using the pulse rate can be accurately obtained.

[Brief description of the drawings]

FIG. 1 is an external view illustrating an example of a pulse meter.

FIG. 2 is an electrical block diagram of a pulse monitor.

FIG. 3 is a flowchart illustrating an entire processing procedure;

FIG. 4 is a flowchart showing a processing procedure in a pulse display mode.

FIG. 5 is a flowchart showing a processing procedure of pulse rate measurement during exercise.

FIG. 6 is a flowchart showing a processing procedure of pulse width stability detection.

FIG. 7 is a flowchart showing a processing procedure for evaluating a pulse interval time.

FIG. 8 is a flowchart showing a processing procedure of pulse pulse interval stability detection.

FIG. 9 is a flowchart illustrating a processing procedure for comparing and evaluating a target pulse rate and a reference pulse rate.

FIG. 10 is a display example of consumed calories.

FIG. 11 is a display example of a fat burning amount.

FIG. 12 is a display example of an error mark.

FIG. 13 is a display example of an error mark.

FIG. 14 is a pulse diagram for complementing pulse data for one beat in the pulse width stability detection means.

FIG. 15 is a pulse diagram for deleting pulse data for one beat in the pulse interval stability detecting means.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Device main body 2 Sensor part 3 Lead wire 4 Input part 5 Display part 6 Sensor drive circuit 7 Amplification circuit 8 Filter circuit 9 A / D conversion circuit 10 Storage device 11 Power supply device 12 Display drive circuit 13 CPU 14 Pulse width stability detection means 15 Pulse interval stability detection means 16 Pulse rate comparison and evaluation means 21 Error mark 22 Pulse data

Claims (4)

[Claims] 1. A pulse meter for measuring a pulse of a body, wherein a pulse width stability detecting means for evaluating a target pulse width based on a pulse width evaluation range and performing a processing operation of the target pulse width corresponding to the pulse width evaluation range. A pulse interval stability detection unit that evaluates a target pulse interval based on a pulse interval evaluation range and performs a processing operation of the target pulse interval corresponding to the pulse interval evaluation range, after the pulse width stability detection unit, A pulse meter characterized by comprising: 2. The method according to claim 1, wherein the pulse width evaluation range is a range of a plurality of stages set according to a difference from a reference pulse width. The pulse data is not updated, the pulse data for one beat is complemented, or the target pulse width data is discarded.The pulse interval evaluation range is set in multiple steps set according to the difference from the reference pulse interval. The processing operation of the target pulse interval includes updating of the reference pulse interval data, non-update of the reference pulse interval data, deletion of pulse data for one beat, complementation of pulse data for one beat, and target pulse interval data. 2. The pulse meter according to claim 1, wherein the pulse rate is discarded. 3. A pulse rate comparing / evaluating means for comparing a target pulse rate with a reference pulse rate and evaluating a difference between the target pulse rate and the reference pulse rate at a stage subsequent to the pulse interval stability detecting means. The pulse meter according to claim 1 or 2, wherein: 4. The pulse rate comparison / evaluation means narrows the comparison evaluation range with the reference pulse rate when the target pulse rate is large, and reduces the comparison evaluation range with the reference pulse rate when the target pulse rate is small. 4. The pulsimeter according to claim 3, wherein the pulsimeter is widened.