JP2009195588A - Biological information processing apparatus and method of controlling biological information processing apparatus - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To ensure reliability of calculated calories which are burned when pulse information is not detected by a pulse information detecting part. <P>SOLUTION: The biological information processing apparatus is equipped with a pulse wave sensor 30 for detecting the pulse information of a user and an MPU308 for calculating calories burned of the user from pulse wave signals detected by the pulse wave sensor 30. When the pulse wave signals are not detected by the pulse wave sensor 30 during the calculation of the calories which are burned by the MPU308, the MPU308 calculates the calories burned for a prescribed period of time from the pulse wave signals detected before the pulse wave signals are not detected. Then, after the elapse of the prescribed period of time, the MPU 308 halts the calculation of the calories burned. <P>COPYRIGHT: (C)2009,JPO&INPIT

Description

The present invention relates to a biological information processing apparatus that calculates calorie consumption based on a user's pulse information and a control method for controlling the biological information processing apparatus.

Conventionally, a pulse wave sensor for detecting a user's pulse wave has been provided, and the pulse wave sensor is mounted on the user's ear or finger to detect the user's pulse wave, and based on the pulse rate calculated from the detected pulse wave There is a calorie consumption meter for calculating the calorie consumption of the user (for example, Patent Document 1).
JP-A-8-52119

However, since this type of calorie consumption meter calculates calorie consumption based on the pulse wave detected by the pulse wave sensor, the pulse wave sensor may be displaced from the user's ears, fingers, etc. If the pulse wave cannot be detected normally by the pulse wave sensor due to the generation of large noise, the calorie consumption cannot be calculated normally at the same time.
Therefore, an object of the present invention is to ensure the reliability of the calculated calorie consumption even when pulse information is no longer detected by the pulse information detector.

In order to solve the above-described problems, the present invention provides a biological information processing apparatus, wherein a pulse information detection unit that detects pulse information of a user and the calorie consumption of the user based on the pulse information detected by the pulse information detection unit A calorie consumption calculating unit for calculating the calorie consumption, when the pulse information is no longer detected by the pulse information detection unit during the calculation of the calorie consumption by the calorie consumption calculation unit, And calculating the calorie consumption based on the pulse information detected before the pulse information is not detected, and stopping the calculation of the calorie consumption after the lapse of the predetermined period. .
Moreover, the said structure WHEREIN: The said calorie consumption calculation part may calculate the said calorie consumption based on the said pulse information detected immediately before the said pulse information is no longer detected during the said predetermined period.
In the above configuration, when the calorie consumption is calculated based on the pulse information detected before the pulse information is not detected during the predetermined period in the predetermined period,
The calculated calorie consumption accuracy may be set to fall within a predetermined allowable range.
In the above configuration, when the pulse information is detected by the pulse information detection unit after the pulse information is no longer detected by the pulse information detection unit, the calorie consumption calculating unit is configured to detect the detected pulse information. The calorie consumption may be calculated based on the above.
Moreover, in order to solve the said subject, this invention calculates the said user's calorie consumption based on the pulse information which the pulse information detection part which detects a user's pulse information, and the said pulse information detection part detects A calorie consumption calculation unit, and a control method of the biological information processing apparatus, wherein the pulse information is not detected by the pulse information detection unit during the calculation of the calorie consumption by the calorie consumption calculation unit, for a predetermined period The calorie consumption calculation unit calculates the calorie consumption based on the pulse information detected before the pulse information is no longer detected, and stops calculating the calorie consumption after the lapse of the predetermined period. thing,
It is characterized by.

According to the present invention, the allowable range based on the pulse information before the pulse information cannot be detected until the predetermined period of time during which the calculation accuracy can be maintained after the pulse information cannot be detected by the pulse information detection unit. Calorie consumption can be calculated with high accuracy, and calorie consumption with high reliability can be calculated. In particular, when the pulse information detection unit cannot be detected by the pulse information detection unit due to the pulse information detection unit being displaced from the user's body or due to noise generated due to the movement of the user's body, In many cases, the pulse information can be immediately detected by correcting the “deviation” or the convergence of the noise, but even in this case, it is possible to continue calculating calories consumed with high reliability. Furthermore, after the lapse of a predetermined period, although the calculation accuracy cannot be ensured, the calculation of calorie consumption is stopped in order to prevent the adverse effects caused by continuing the calculation. it can.

Next, preferred embodiments of the present invention will be described with reference to the drawings.
FIG. 1 is a diagram illustrating a configuration of a biological information processing apparatus 1 according to the present embodiment. The biological information processing apparatus 1 detects a pulse wave signal that is user's pulse information, calculates a pulse rate from the detected pulse wave signal, and calculates a user's calorie consumption based on the calculated pulse rate. is there.
The biological information processing apparatus 1 can be broadly divided into a wristwatch-type device main body 10 attached to a user's wrist L (FIG. 3), and connected to the device main body 10 via a cable 20 so that signal communication is possible. A pulse wave sensor 30 (pulse information detector) that detects a pulse wave signal that is pulse information. As shown in FIG. 1, the apparatus main body 10 is provided with a wristband 12, and the apparatus main body 10 is detachably attached to the wrist L of the user via the wristband 12.

FIG. 2 is a plan view of the apparatus main body 10 of the biological information processing apparatus 1, and FIG. 3 is a side view of the apparatus main body 10 viewed from the 3 o'clock direction with the biological information processing apparatus 1 attached to the user. .
In FIG. 2, the apparatus body 10 includes a resin watch case 11. Watch case 1
1 is provided with a liquid crystal display device 13 (display unit) with an EL backlight that displays the user's pulse rate, calorie consumption, body motion pitch, and the like in addition to the current time and date. .
The liquid crystal display device 13 includes a first segment display area 131 located on the upper left side of the display surface,
A second segment display area 132 located on the upper right side, a third segment display area 133 located on the lower right side, and a dot display area 134 located on the lower left side are configured. This information can be displayed graphically.
On the outer periphery of the watch case 11 are provided button switches 111 to 115 for performing various instructions such as calculation of calorie consumption and change of operation mode.
Large button switches 116 and 117 are provided. In the present embodiment, the user can input and register individual information such as his / her gender, age, height, and weight by using these button switches 111 to 117. This registered individual information is used at the time of calorie consumption calculation to be described later.

A body motion sensor 90 is built in the watch case 11. The body motion sensor 90 is a sensor that detects a body motion signal used to calculate a user's body motion pitch and body motion level.
A control unit 5 that centrally controls each unit of the biological information processing apparatus 1 is provided inside the watch case 11. The control unit 5 calculates the pulse rate and calorie consumption based on the pulse wave signal detected by the pulse wave sensor 30. In addition, the control unit 5 calculates the user's body motion pitch and body motion level based on the body motion signal detected by the body motion sensor 90. The control unit 5 can display the calculated pulse rate, calorie consumption, user's body motion pitch, and body motion level on the liquid crystal display device 13 according to the user's instructions. Furthermore, the control unit 5 includes a timer circuit, can display the normal time on the liquid crystal display device 13 and can measure a predetermined period S described later.
In addition, a button-type small battery 59 is provided inside the watch case 11. The battery 59 supplies power to the biological information processing apparatus 1. The pulse wave sensor 30 is supplied with electric power from the battery 59 via the cable 20. Inside the watch case 11, a buzzer flat piezoelectric element 58 is arranged at 9 o'clock with respect to the battery 59.
Since the battery 59 is heavier than the piezoelectric element 58, the position of the center of gravity of the apparatus main body 10 is offset in the 3 o'clock direction. Since the wristband 12 is connected to the side where the center of gravity is biased,
The apparatus main body 10 can be worn on the arm in a stable state. Furthermore, since the battery 59 and the piezoelectric element 58 are arranged in the plane direction, the apparatus main body 10 can be thinned.

In FIG. 3, a connecting portion 121 for connecting one end of the wristband 12 is formed in the 12 o'clock direction of the watch case 11, and the other end of the wristband 12 is connected in the 6 o'clock direction. A connecting portion 122 for connecting is formed, and the wristband 12 is connected to the watch case 11 via these connecting portions 121 and 122.
Further, as shown in FIG. 3, a curved portion 109 that is curved toward the back surface portion 119 is formed in the 6 o'clock direction of the apparatus main body 10, and the curved portion 109 rotates at the end of the 6 o'clock direction. A stop 108 is formed. When the biological information processing apparatus 1 is attached to the wrist L, the back surface portion 119 of the watch case 11 is in close contact with the upper surface portion L1 of the wrist L, and the rotation stopper 108 is the side where the rib R of the wrist L is present. It contacts the side surface portion L2 which is the side surface. For this reason, the apparatus main body 1
Even if 0 is to be rotated in the direction of arrow A or arrow B in FIG. 3, the rotation is prevented by the back surface portion 119 and the rotation stop portion 108, and the apparatus main body 10 is not unnecessarily displaced around the wrist L. In particular, in the present embodiment, it is assumed that the user exercises with the biological information processing apparatus 1 attached. However, even when the user exercises with the above-described configuration, the apparatus main body 10 moves around the wrist L. Since it does not shift unnecessarily, it is possible to improve user comfort.

FIG. 4 is a view showing the pulse wave sensor 30 attached to the finger, and FIG.
FIG. In FIG. 5, the upward direction in FIG. 5 is the direction in which the finger is positioned when the pulse wave sensor 30 is attached to the finger.
The pulse wave sensor 30 is a sensor for detecting a pulse wave signal that is a user's pulse information,
It is worn between the base of the user's finger and the finger joint while being shielded by the sensor fixing band 40. Thus, since the pulse wave sensor 30 is attached to the base of the finger, the apparatus main body 10
And the pulse wave sensor 30 are close to each other, the cable 20 can be short, and the cable 20 can be prevented from being loosened or loosened, and the cable 20 does not get in the way during the user's movement. Also,
When the distribution of body temperature from the palm to the fingertip is measured, the temperature of the fingertip is significantly reduced when it is cold, whereas the temperature at the base of the finger is not relatively lowered. Therefore, when the pulse wave sensor 30 is mounted at the base of the finger, the user's pulse wave signal can be detected without being relatively affected by the temperature of the outside air.

In FIG. 5, the pulse wave sensor 30 has a back cover 4 on the back side of a sensor frame 36 as its case body.
The component storage space 400 is formed inside by covering 02. A circuit board 35 is arranged in the component storage space 400. On the circuit board 35, an LED 31, a phototransistor 32, and other electronic components are mounted. The end of the cable 20 is fixed to the pulse wave sensor 30 by a bush 493, and each wiring of the cable 20 is connected to each circuit board 3.
5 is soldered on the pattern.
A light transmitting plate 34 made of a glass plate is provided on the upper surface portion of the sensor frame 36, and the LED 31 is disposed below the light receiving plate with the light emitting surface facing the light transmitting plate 34. In addition, the phototransistor 32 is arranged with the light receiving surface facing. Because of this configuration
When the pulse wave sensor 30 is worn on the finger to detect the pulse wave signal, the light emitted from the LED 31 is applied to the finger through the translucent plate 34, and the light reflected from the finger is transmitted through the translucent plate 34. The phototransistor 32 can receive light. Here, in order to improve the adhesion between the outer surface 441 of the translucent plate 34 and the finger surface, the outer surface 441 of the translucent plate 34 has a structure protruding from the peripheral portion 461 thereof.

The pulse wave sensor 30 detects a pulse wave signal by irradiating light from the LED 31 toward the blood vessel of the finger and receiving light reflected from the blood vessel by the phototransistor 32. In detecting the pulse wave signal, the present embodiment uses the LED 44 whose emission wavelength region is in the range of 300 nm to 700 nm and the phototransistor 45 whose light reception wavelength region is 700 nm or less. Thereby, among the light included in the external light, the light having a wavelength region of 700 nm or less is
While light does not reach the phototransistor 45 with the finger as a light guide, most of the light of 300 nm or less is absorbed by the skin surface, so that it is possible to detect a pulse wave without being affected by direct sunlight. it can.

FIG. 6 is a block diagram showing a functional configuration of the biological information processing apparatus 1.
As shown in FIG. 6, the control unit 5 is roughly classified into a pulse wave data processing unit 500 that performs shaping and A / D conversion of a pulse wave signal detected by the pulse wave sensor 30 and a body motion sensor 90. A body motion data processing unit 501 that performs body motion signal shaping and A / D conversion, a clock generation unit 502 that generates an operation clock signal, and a control unit 503 that controls the entire control unit 5 are provided.
The pulse wave data processing unit 500 is roughly divided into a pulse wave signal amplifying circuit 303 and a pulse wave waveform shaping circuit 306. The pulse wave data processing unit 500 shares the A / D conversion circuit 305 with the body motion data processing unit 501. I have. The pulse wave signal amplification circuit 303 outputs the pulse wave amplification signal generated by amplifying the pulse wave signal input from the pulse wave sensor 30 to the A / D conversion circuit 305 and the pulse wave waveform shaping circuit 306. The pulse wave waveform shaping circuit 306 performs waveform shaping of the pulse wave amplification signal to control the control unit 50.
3 is output. The A / D conversion circuit 305 performs A / D conversion of the pulse wave amplification signal and outputs the pulse wave data to the control unit 503.

The body motion data processing unit 501 can be roughly divided into a body motion signal amplifying circuit 304 and a body motion waveform shaping circuit 307, which are shared with the pulse wave data processing unit 500 as described above and are A / D. A conversion circuit 305 is provided. The body motion signal amplification circuit 304 outputs the body motion amplification signal generated by amplifying the body motion signal input from the body motion sensor 90 to the A / D conversion circuit 305 and the body motion waveform shaping circuit 307. The body motion waveform shaping circuit 307 performs waveform shaping of the body motion amplification signal and outputs it to the control unit 503. The A / D conversion circuit 305 performs A / D conversion of the body motion amplification signal and outputs it to the control unit 503 as body motion data.
The clock generation unit 502 includes an oscillation circuit 312 and a frequency dividing circuit 313, when roughly classified. The oscillation circuit 312 includes a crystal oscillator and the like, and supplies the clock signal to the control unit 503 as a reference operation clock and supplies it to the frequency dividing circuit 313 so as to generate a clock signal for timing from the clock signal. The frequency dividing circuit 313 divides the supplied clock signal, generates various clock signals for timing, and supplies them to the control unit 503.

The control unit 503 is roughly divided into an MPU 308, a RAM 309, and a ROM 31.
0 and a communication unit 311. The MPU 308 centrally controls each unit of the biological information processing apparatus 1 based on a control program stored in the ROM 310. The RAM 309
It is used as a work area for the MPU 308, and temporarily stores calculation results by the MPU 308 and various data including the above-described pulse wave data and body motion data. The RAM 309 stores the calculated user's pulse rate for a certain period. As will be described in detail later, the stored pulse rate is used when the user's calorie consumption is continuously calculated for a predetermined period S when the pulse wave signal is no longer detected by the pulse wave sensor 30. . ROM51 is MPU308.
The control program executed by is stored. The communication unit 311 transmits / receives data to / from an external device connected via a communication connector under the control of the MPU 308. Thereby, it is possible to output calculation data to an external device or to input setting data of the biological information processing apparatus 1 from the external device.

As described above, the biological information processing apparatus 1 according to the present embodiment calculates a pulse rate based on the pulse wave signal detected by the pulse wave sensor 30, and calculates calorie consumption based on the pulse rate.
Here, an example of a method for calculating the pulse rate and a method for calculating the calorie consumption will be described.
First, an example of a method for calculating the pulse rate will be described.
When the user gives an instruction to start calculating the pulse rate via the button switches 111 to 117, the MPU 308 outputs a control signal to the A / D conversion circuit 305, and the A of the pulse wave amplification signal is output.
/ D conversion is performed, pulse wave data is generated, and this pulse wave data is output to the MPU 308. Then, the MPU 308 performs frequency analysis on the pulse wave data by fast Fourier transform processing, extracts the pulse wave component, and calculates the pulse rate from the pulse wave component. When calculating the pulse rate, the user's body motion level is calculated based on the body motion data at the same time, and when the body motion level is above a certain level, strong noise is generated by the user's body motion, The calculation of the pulse rate may be temporarily stopped because it is impossible to calculate a highly reliable pulse rate. According to this configuration, only a highly reliable pulse rate is calculated and displayed on the liquid crystal display device 13 or the like, for example.

Next, an example of a method for calculating calorie consumption will be described. For convenience of explanation, it is assumed that the user has previously registered his / her age, sex, height, and weight.
When the user gives an instruction to start calculating calorie consumption via the button switches 111 to 117, the MPU 308 calculates the pulse rate calculated by the above-described method and the registered user's age, sex, height, and weight. Using the data related to the above, the oxygen intake of the user is calculated. Here, the oxygen intake is the amount of oxygen taken in by the user per unit time and unit weight. A known calculation formula can be applied as a calculation formula used when calculating the oxygen intake.
Next, the MPU 308 adds the calculated oxygen intake to the user's body weight, the calorie consumed as a calorie consumed when a unit amount of oxygen is consumed, and the time during which the calculated oxygen intake continues. The calorie consumption is calculated while the calculated oxygen intake is continued. While calculating the calorie consumption, the MPU 308 accumulates the calorie consumption calculated in this manner, and calculates the calorie consumption consumed by the user after the start of the calorie consumption (hereinafter referred to as “cumulative calorie consumption”). In other words, while the calorie consumption is being calculated, the MPU 308 calculates the calorie consumption at any time based on the current pulse rate of the user, takes the cumulative calorie consumption after the calculation starts, and calculates the cumulative calorie consumption. calculate. The accumulated calorie consumption calculated in this way is displayed on the liquid crystal display device 13 and is shown to the user, for example.
As mentioned above, although the example of the method of calculation of a pulse rate and calorie consumption was described, it cannot be overemphasized that the method of calculation of a pulse rate and calorie consumption is not restricted to this.

As described above, the biological information processing apparatus 1 calculates calorie consumption based on the user's pulse rate. In this embodiment, the biological information processing apparatus 1 performs the following operations when calculating calorie consumption. This improves the accuracy of calorie consumption calculated to ensure reliability.

FIG. 7 is a flowchart showing the operation of the biological information processing apparatus 1 when calculating calorie consumption. Note that the operation shown in FIG. 7 is realized by the MPU 308 reading and executing the control program stored in the ROM 310. In addition, when the operation of FIG.
U308 functions as a calorie consumption calculation unit.
First, in calculating calorie consumption, the user performs an operation to start calculating calorie consumption via the button switches 111 to 117. In response to this operation, the MPU 308 of the biological information processing apparatus 1 starts calculating calorie consumption (step S1).
After starting the calculation of calorie consumption, the MPU 308 outputs a control signal to the A / D conversion circuit 305 to generate pulse wave data, and causes the MPU 308 to output this pulse wave data. And M
The PU 308 refers to the pulse wave data input from the A / D conversion circuit 305 and refers to the pulse wave sensor 3.
It is monitored whether or not the user's pulse wave signal is detected by 0 (step S2).
Here, the state in which the pulse wave signal is detected refers to a state in which the pulse wave sensor 30 is normally worn on the user's finger and the pulse wave sensor 30 can detect the user's pulse wave signal. . On the other hand, the state in which the pulse wave signal is not detected means that, for example, the pulse wave sensor 30 is displaced from the finger, or noise is generated due to the movement of the user.
A state in which the pulse wave signal of the user is not detected by 0, a state in which the pulse wave sensor 30 is removed from the finger by the user, and a pulse wave signal is not detected by the pulse wave sensor 30 or the like.

When it is detected by the pulse wave sensor 30 that a pulse wave signal is detected (step S2
: YES), the MPU 308 calculates the pulse rate based on the pulse wave signal (step S3), and calculates the calorie consumption based on the calculated pulse rate (step S4). As described above, while the pulse wave signal is detected by the pulse wave sensor 30, the calorie consumption is calculated as needed based on the detected pulse wave signal.
On the other hand, when it is detected that the pulse wave signal is not detected by the pulse wave sensor 30 (step S2: NO), the MPU 308 calculates the user's pulse calculated immediately before the pulse wave signal is not detected by the pulse wave sensor 30. The number (hereinafter referred to as “immediate pulse rate”) is acquired from the RAM 309 (step S5). Then, the MPU 308 starts measuring the predetermined period S (step S6). Thereafter, the MPU 308 calculates calorie consumption based on the acquired previous pulse rate (step S7).

Here, the predetermined period S will be described in detail. As described above, in the present embodiment, after the pulse wave signal is no longer detected by the pulse wave sensor 30, the calorie consumption is calculated based on the previous pulse rate as shown in step S7. by. That is, for example, when the user is exercising with the biological information processing apparatus 1 mounted, the pulse wave sensor 30
If the pulse wave signal cannot be detected by the pulse wave sensor 30 due to deviation from the user's finger or noise due to the movement of the user, the user immediately It is difficult to think of exercising at extremely different paces. Therefore, it is considered that the user's pulse rate does not change extremely after the pulse wave signal cannot be detected. Therefore, even after the pulse wave signal is no longer detected by the pulse wave sensor 30, the calorie consumption can be calculated with high reliability by calculating the calorie consumption based on the previous pulse rate for a while.
However, after a certain period of time, when calorie consumption is calculated based on the previous pulse rate, it is difficult to ensure the reliability of the calculated calorie consumption. This is because, in the long term, the user is likely to be exercising while changing the pace of exercise, and when the pulse wave signal is not detected by the pulse wave sensor 30 for a long time, the user is This is because there is a possibility that calories are not consumed due to the user's exercise after taking a break from the body.

In view of this, in the present embodiment, when the calorie consumption is calculated based on the previous pulse rate during the predetermined period S, the predetermined period S is set so that the accuracy of the calculated calorie consumption falls within a predetermined allowable range. Has been. Then, until the predetermined period S elapses after the pulse wave sensor 30 can no longer detect the pulse wave signal, the calorie consumption is calculated with the accuracy of the allowable range by calculating the calorie consumption based on the immediately preceding pulse rate. And the reliability of the calorie consumption calculated is ensured. On the other hand, after the elapse of the predetermined period S, although the calculation accuracy cannot be ensured,
In order to prevent adverse effects caused by continuing calculation of calorie consumption, calculation of calorie consumption is stopped, thereby ensuring the reliability of the calorie consumption calculated.
In particular, when the pulse wave sensor 30 cannot be detected by the pulse wave sensor 30 due to the pulse wave sensor 30 being displaced from the finger or due to noise generated by the movement of the user's body, the “deviation” from the finger. In many cases, the pulse wave signal can be detected immediately by the correction of the noise and the convergence of the noise, but in this case as well, according to the present embodiment, the pulse wave signal can be detected. In the meantime, highly reliable calorie consumption is calculated based on the previous pulse rate, and the reliability of the calculated calorie consumption can be improved.
As the predetermined period S, for example, when the pulse rate is calculated by sampling, a period corresponding to three samplings can be set. In this case, the predetermined period S can be set easily.

Now, returning to FIG. 7, while calculating the calorie consumption based on the previous pulse rate in step S <b> 7, the MPU 308 determines whether the predetermined period S has elapsed after the pulse wave signal is no longer detected by the pulse wave sensor 30. It is determined whether or not (step S8).
When the predetermined period S has not elapsed (step S8: NO), the MPU 308 determines whether or not a pulse wave signal is detected by the pulse wave sensor 30 (step S9). this is,
If a pulse wave signal is detected again by the pulse wave sensor 30 before the predetermined period S elapses, the pulse rate is calculated based on the actually detected pulse wave signal, rather than calculating the calorie consumption based on the previous pulse rate. This is because calculating the number and calculating the calorie consumption based on the calculated pulse rate can calculate the calorie consumption with high reliability. In particular, when the pulse wave sensor 30 cannot be detected by the pulse wave sensor 30 because the pulse wave sensor 30 is displaced from the user's finger or noise is generated due to the movement of the user, the “displacement with respect to the finger” In many cases, the pulse wave signal can be immediately detected by the pulse wave sensor due to the correction of "" and the convergence of noise. However, even in this case, according to the present embodiment, the calorie consumption is calculated with high reliability. Can continue.
In step S9, when the pulse wave signal is detected by the pulse wave sensor 30 before the predetermined period S has elapsed (step S9: YES), the MPU 308 calculates the pulse rate and thus the calorie consumption based on the detected pulse wave signal. Therefore, the processing procedure is shifted to step S2. On the other hand, if the pulse wave signal is not detected by the pulse wave sensor 30 before the predetermined period S has elapsed (step S9: NO), the MPU 308 continues the processing procedure to calculate the calorie consumption based on the previous pulse rate in step S7. Migrate to

On the other hand, when it is determined in step S8 that the predetermined period S has elapsed after the pulse wave sensor 30 no longer detects the pulse wave signal (step S8: YES), the MPU 308
As described above, since it is difficult to ensure the reliability of the calculated pulse rate, the calculation of calorie consumption is stopped (step S10). Thereafter, the MPU 308 again monitors whether or not the pulse wave signal is detected by the pulse wave sensor 30 (step S11), and when the pulse wave signal is detected (step S11).
Step S11: YES), the processing procedure is shifted to Step S2 in order to calculate the pulse rate and thus the calorie consumption based on the detected pulse wave signal.

In the above-described embodiment, the calorie consumption is calculated based on the previous pulse rate in step S7, but the calorie consumption calculation method is not limited to this. For example, MPU
308 refers to the pulse rate stored in the RAM 309, sets the pulse rate trend, predicts the user's pulse rate during the predetermined period S based on the set trend, and based on the predicted pulse rate The calorie consumption may be calculated. Further, for example, in step S7, the MPU 308 refers to the pulse rate stored in the RAM 309, and calculates the average value of the user's pulse rate after starting calculation of calorie consumption or the pulse wave by the pulse wave sensor 30. An average value of the user's pulse rate for a predetermined time before no signal is detected may be calculated, and calorie consumption may be calculated based on the calculated average value.
In the above-described embodiment, when a pulse wave signal is detected by the pulse wave sensor 30 before the predetermined period S elapses, a period from when the pulse wave signal is not detected until it is detected (hereinafter, “
In the “non-detection period”, calorie consumption is calculated based on the pulse rate immediately before the pulse wave signal is no longer detected (steps S7, S8, S9). Here, instead of the method of calculating the calorie consumption based on the pulse rate immediately before the pulse wave signal is no longer detected, during the non-detection period of the pulse wave signal, for example, the MPU 308 You may make it calculate calorie consumption based on the average value of the pulse rate immediately before being detected and the pulse rate immediately after the pulse signal was detected. Further, instead of the above-described calculation method, the calorie consumption for the non-detection period of the pulse wave signal is calculated after the pulse wave signal is re-detected.
8 may calculate calorie consumption during the non-detection period of the pulse wave signal based on the pulse rate immediately after the pulse signal is detected.

As described above, in the present embodiment, when the pulse wave signal that is the pulse information is no longer detected by the pulse wave sensor 30 during the calculation of calorie consumption, the MPU 308 determines that the predetermined period S
During the period, calorie consumption is calculated based on the previous pulse rate, and after a predetermined period S has elapsed, calculation of calorie consumption is stopped. Here, the predetermined period S is a period set so that the accuracy of the calculated calorie consumption falls within a predetermined allowable range when calorie consumption is calculated based on the previous pulse rate during the predetermined period S. Therefore, according to the present embodiment, the calorie consumption can be calculated with the accuracy of the allowable range based on the immediately preceding pulse rate from when the pulse wave signal cannot be detected by the pulse wave sensor 30 until the predetermined period S elapses. The calorie consumption with high reliability can be calculated. Further, after the predetermined period S has elapsed, the calculation of calorie consumption is stopped in order to prevent adverse effects caused by continuing the calculation even though the calculation accuracy cannot be ensured. Thereby, the reliability of the calculated calorie consumption can be ensured.
In particular, when the pulse wave sensor 30 cannot be detected by the pulse wave sensor 30 due to the pulse wave sensor 30 being displaced from the finger or due to noise generated by the movement of the user's body, the “deviation” from the finger. In many cases, the pulse wave signal can be detected immediately by the correction of the noise and the convergence of the noise, but in this case as well, according to the present embodiment, the pulse wave signal can be detected. In the meantime, highly reliable calorie consumption is calculated based on the previous pulse rate, and the reliability of the calculated calorie consumption can be improved.

Moreover, in this Embodiment, as shown to step S7, during the predetermined period S, a calorie consumption is calculated based on the last pulse wave cox. Here, for example, when the user is exercising with the biological information processing apparatus 1 mounted, the pulse wave sensor 30 is displaced from the user's finger,
When the pulse wave signal cannot be detected by the pulse wave sensor 30 due to the occurrence of noise caused by the user's movement, the user changes the pace of exercise extremely immediately after the detection becomes impossible. It is hard to think about exercising. Therefore, it is considered that the user's pulse rate does not change extremely after the pulse wave signal cannot be detected. Therefore, even after the pulse wave signal is no longer detected by the pulse wave sensor 30, the calorie consumption can be calculated with high reliability by calculating the calorie consumption based on the previous pulse rate for the predetermined period S. it can.

In the present embodiment, as described above, when the calorie consumption is calculated in the predetermined period S based on the immediately preceding pulse rate during the predetermined period S, the accuracy of the calculated calorie consumption falls within a predetermined allowable range. It is the period set as follows. During the predetermined period S set in this way, the calorie consumption is calculated based on the immediately preceding pulse rate, and after the predetermined period S has elapsed, the calculation of the calorie consumption is stopped, thereby calculating the reliability of the calculated calorie consumption. Can be secured.

In the present embodiment, as shown in step S9 and step S11, when the pulse wave signal is no longer detected by the pulse wave sensor 30, the pulse wave sensor 30 detects the pulse wave signal again. Based on the pulse wave signal thus obtained, the pulse rate and thus the calorie consumption are calculated. This is because, when a pulse wave signal is detected by the pulse wave sensor 30, it is more reliable to calculate the pulse rate and thus the calorie consumption based on the detected pulse signal. This is because it can be calculated. Therefore, according to the present embodiment, it is possible to calculate the calorie consumption with higher reliability and to ensure the reliability of the calculated calorie consumption.

In addition, embodiment mentioned above shows the one aspect | mode of this invention to the last, and a deformation | transformation and application are arbitrarily possible within the scope of the present invention.
For example, in the above-described embodiment, the example in which the present invention is applied to the wristwatch-type biological information processing apparatus 1 used by being worn on the wrist L of the user has been described. The present invention is not limited to 1, and can be widely applied to a biological information processing apparatus that detects calorie consumption based on pulse wave information including a user's pulse wave signal.
Further, for example, in the above-described embodiment, a case where a control program for controlling the biological information processing apparatus 1 is stored in the ROM 310 in advance has been described. However, control is performed on various recording media such as a magnetic disk, an optical disk, and a memory card. It is also possible to store the program for use in advance, read it from these recording media, and install it. It is also possible to provide a communication interface, download the control program via a communication network such as the Internet or LAN, install and execute the program.

It is a figure which shows the structure of the biological information processing apparatus which concerns on this embodiment. It is a top view of the apparatus main body of a biological information processing apparatus. It is the side view which looked at the biological information processor from the direction of 3 o'clock in a wristwatch. It is a figure which shows the pulse wave sensor of a biological information processing apparatus. It is sectional drawing of the pulse wave sensor of a biological information processing apparatus. It is a block diagram which shows the functional structure of a biological information processing apparatus. It is a flowchart which shows the operation | movement at the time of calculation of calorie consumption.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 ... Living body information processing apparatus, 30 ... Pulse wave sensor (pulse information detection part), 308 ... MPU (calorie consumption calculation part).

Claims (5)

A pulse information detection unit that detects the pulse information of the user, and a calorie consumption calculation unit that calculates the calorie consumption of the user based on the pulse information detected by the pulse information detection unit,
When the pulse information is not detected by the pulse information detection unit during the calculation of the calorie consumption by the calorie consumption calculation unit, the calorie consumption calculation unit
Calculating the calorie consumption based on the pulse information detected before the pulse information is no longer detected, and stopping the calculation of the calorie consumption after the lapse of the predetermined period;
A biological information processing apparatus characterized by the above. The calorie consumption calculating unit calculates the calorie consumption based on the pulse information detected immediately before the pulse information is not detected during the predetermined period;
The biological information processing apparatus according to claim 1. In the predetermined period, when the calorie consumption is calculated based on the pulse information detected before the pulse information is not detected during the predetermined period, the accuracy of the calculated calorie consumption is a predetermined allowable range. Be set to fit in,
The biological information processing apparatus according to claim 1 or 2. When the pulse information is not detected by the pulse information detection unit and then the pulse information is detected by the pulse information detection unit, the calorie consumption calculation unit is configured to calculate the calorie consumption based on the detected pulse information. Calculating
The biological information processing apparatus according to any one of claims 1 to 3. Control of a biological information processing apparatus comprising: a pulse information detection unit that detects a user's pulse information; and a calorie consumption calculation unit that calculates the calorie consumption of the user based on the pulse information detected by the pulse information detection unit A method,
When the pulse information is not detected by the pulse information detection unit during the calculation of the calorie consumption by the calorie consumption calculation unit, detection is performed before the pulse information is not detected by the calorie consumption calculation unit for a predetermined period. Calculating the calorie consumption based on the pulse information that has been performed, and stopping the calculation of the calorie consumption after the lapse of the predetermined period;
A control method for a biological information processing apparatus.

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