JP2017213063A - Respiration monitoring device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a respiration monitoring device capable of restraining an inaccurate respiratory signal from being calculated even when two or more users are present on a sensor unit.SOLUTION: A respiration monitoring device 1 includes: a sensor unit in which a plurality of sensors for outputting a signal corresponding to a load or vibration are arranged; a signal acquisition unit 23 for acquiring the signal; and a respiratory signal calculation unit 25 for calculating a respiratory signal on the basis of the signal. The respiration monitoring device further includes a peak frequency calculation unit 27, a determination unit 29, and a stop unit 31. The peak frequency calculation unit calculates a peak frequency for each sensor. The determination unit determines whether or not the peak frequency distribution has two or more maximum values. The stop unit stops the calculation of the respiratory signal if the peak frequency distribution is determined to have two or more maximum values.SELECTED DRAWING: Figure 4

Description

  The present disclosure relates to a respiratory monitoring device.

  Conventionally, the following respiration monitor devices are known. The respiration monitor device includes a sensor unit and a control unit. A plurality of sensors that output a signal corresponding to a load or vibration are arranged in the sensor unit.

  The sensor unit has a sheet shape. The user lies on the sensor unit. Each sensor outputs a signal corresponding to the load or signal of the user. The control unit calculates a respiratory signal using the output signal. Such a technique is disclosed in Patent Document 1.

JP 2005-198781 A

  There may be two or more users lying on the sensor unit. For example, a child and a guardian may lie on the sensor unit. In this case, the signal output from the sensor unit is a signal that reflects the respiration of two or more users. Therefore, if the signal output from the sensor unit is used as it is, an inaccurate respiration signal is calculated.

  The present disclosure has been made in view of these problems, and provides a respiratory monitor device that can suppress the calculation of an inaccurate respiratory signal even when two or more users exist on the sensor unit. The purpose is to do.

  One aspect of the present disclosure includes a sensor unit in which a plurality of sensors that output a signal corresponding to a load or vibration are arranged, a signal acquisition unit that acquires a signal from the sensor unit, and a respiratory signal that calculates a respiratory signal based on the signal For each sensor, a peak frequency calculation unit that calculates the peak frequency in the frequency power spectrum of the signal, and whether the distribution of the peak frequency calculated by the peak frequency calculation unit has a maximum value of 2 or more is determined. The respiratory monitoring device includes a determination unit and a stop unit that stops calculation of a respiratory signal by the respiratory signal calculation unit when the determination unit determines that the maximum value is 2 or more.

According to the respiration monitoring device of the present disclosure, it is possible to prevent an inaccurate respiration signal from being calculated when there are two or more users on the sensor unit.
One aspect of the present disclosure includes a sensor unit in which a plurality of sensors that output a signal corresponding to a load or vibration are arranged, a signal acquisition unit that acquires a signal from the sensor unit, and a respiratory signal that calculates a respiratory signal based on the signal For each sensor, a peak frequency calculation unit that calculates the peak frequency in the frequency power spectrum of the signal, and whether the distribution of the peak frequency calculated by the peak frequency calculation unit has a maximum value of 2 or more is determined. If the determination unit determines that the determination unit has a maximum value of 2 or more, the signal used by the respiration signal calculation unit for calculating the respiration signal is a peak centered on the one maximum value in the peak frequency distribution. And a signal limiting unit for limiting to the signal corresponding to.

According to the respiratory monitoring device of the present disclosure, even when there are two or more users on the sensor unit, an accurate respiratory signal can be calculated for one of them.
One aspect of the present disclosure includes a sensor unit in which a plurality of sensors that output a signal corresponding to a load or vibration are arranged, a signal acquisition unit that acquires a signal from the sensor unit, and a respiratory signal that calculates a respiratory signal based on the signal For each sensor, a peak frequency calculation unit that calculates the peak frequency in the frequency power spectrum of the signal, and whether the distribution of the peak frequency calculated by the peak frequency calculation unit has a maximum value of 2 or more is determined. A determination unit, a state detection unit that detects a change in the total load applied to the plurality of sensors, or a change in pressure distribution in the plurality of sensors, and the determination unit determines that the sensor has a maximum value of 2 or more, and the total load If the state detection unit detects a change in pressure or a change in pressure distribution, A stop unit to stop the calculation, a respiration monitor device comprising a.

  According to the respiration monitoring device of the present disclosure, it is possible to prevent an inaccurate respiration signal from being calculated when there are two or more users on the sensor unit. Further, it can be more accurately determined whether or not there are two or more users on the sensor unit.

  One aspect of the present disclosure includes a sensor unit in which a plurality of sensors that output a signal corresponding to a load or vibration are arranged, a signal acquisition unit that acquires a signal from the sensor unit, and a respiratory signal that calculates a respiratory signal based on the signal For each sensor, a peak frequency calculation unit that calculates the peak frequency in the frequency power spectrum of the signal, and whether the distribution of the peak frequency calculated by the peak frequency calculation unit has a maximum value of 2 or more is determined. A determination unit, a state detection unit that detects a change in the total load applied to the plurality of sensors, or a change in pressure distribution in the plurality of sensors, and the determination unit determines that the sensor has a maximum value of 2 or more, and the total load When the state detection unit detects a change in the pressure or a change in pressure distribution, the breathing signal calculation unit The signal to be used for output, in the distribution of the peak frequency, a respiratory monitoring apparatus comprises a signal limiting unit for limiting the signal corresponding to the peak centered at one of the maximum value.

  According to the respiratory monitoring device of the present disclosure, even when there are two or more users on the sensor unit, an accurate respiratory signal can be calculated for one of them. Further, it can be more accurately determined whether or not there are two or more users on the sensor unit.

1 is a plan view illustrating a configuration of a respiration monitor device 1. FIG. 4 is a perspective view illustrating a configuration of a sensor unit 3 and a bed 35. FIG. 1 is a block diagram illustrating a configuration of a respiration monitor device 1. FIG. 2 is a block diagram showing a functional configuration of a respiration monitor device 1. FIG. It is a flowchart showing the process which the respiration monitor apparatus 1 performs. It is explanatory drawing showing the example of distribution of a peak frequency. It is explanatory drawing showing the state in which the two users 43 and 45 exist on the sensor unit. 2 is a block diagram showing a functional configuration of a respiration monitor device 1. FIG. It is a flowchart showing the process which the respiration monitor apparatus 1 performs. 2 is a block diagram showing a functional configuration of a respiration monitor device 1. FIG. It is a flowchart showing the process which the respiration monitor apparatus 1 performs. It is explanatory drawing showing the change of a total load when one user has been on the sensor unit 3 until then and one user got on the sensor unit 3 until then. It is explanatory drawing showing the change of pressure distribution when there is one user on the sensor unit 3 until then and one user gets on the sensor unit 3 until then. 2 is a block diagram showing a functional configuration of a respiration monitor device 1. FIG. It is a flowchart showing the process which the respiration monitor apparatus 1 performs.

An embodiment of the present disclosure will be described with reference to the drawings.
<First Embodiment>
1. Configuration of Respiration Monitor Device 1 The configuration of the respiration monitor device 1 will be described with reference to FIGS. As shown in FIG. 1, the respiratory monitor device 1 includes a sensor unit 3 and a control unit 5. The sensor unit 3 includes two sheet protection members 7, three sensor sheets 9, and a sensor selection unit 11. The three sensor sheets 9 and the sensor selector 11 are sandwiched between the two sheet protection members 7. The sensor selection unit 11 is provided for each sensor sheet 9.

  The sensor sheet 9 is a sheet-like member. The sensor sheet 9 includes a plurality of sensors 13. The plurality of sensors 13 are arranged at equal intervals in the sensor sheet 9. The total number of sensors 13 is 162 in the three sensor sheets 9.

  The sensor 13 has a structure using a pressure sensitive element for the electrode of the membrane switch. The electrical resistance of the sensor 13 decreases according to the load applied to the sensor 13. The sensor 13 outputs a signal corresponding to the load applied to the sensor 13 with the above structure. The sensor selection unit 11 can switch the sensor 13 that outputs a signal to the control unit 5.

  As shown in FIG. 3, the control unit 5 includes an A / D conversion unit 15, a microcomputer 17, a memory 19, and a display unit 21. The A / D converter 15 converts the analog signal output from the sensor unit 3 into a digital signal.

  Various functions of the control unit 5 are realized by the microcomputer 17 executing a program stored in a non-transitional tangible recording medium. In this example, the memory 19 corresponds to a non-transitional tangible recording medium that stores a program. Further, by executing this program, a method corresponding to the program is executed. Note that the number of the microcomputers 17 constituting the control unit 5 may be one or plural. The memory 19 is a semiconductor memory such as a RAM, a ROM, or a flash memory. The display unit 21 is a display composed of an LED, a liquid crystal device, or the like.

  As shown in FIG. 4, the control unit 5 includes a signal acquisition unit 23, a respiration signal calculation unit 25, a peak frequency calculation unit 27, and a determination as a function configuration realized by the microcomputer 17 executing the program. The unit 29, the cancellation unit 31, and the filter unit 33 are provided. The method of realizing these elements constituting the control unit 5 is not limited to software, and some or all of the elements may be realized using hardware that combines a logic circuit, an analog circuit, and the like.

  The respiratory monitoring device 1 is used in the bed 35 shown in FIG. The bed 35 includes a placement portion 37 and a back plate portion 39. A bedding 41 such as a mattress is placed on the placement portion 37. The sensor unit 3 is disposed on the placement unit 37 and below the bedding 41. The position of the sensor unit 3 when viewed from above is a position where at least a part thereof overlaps the chest and abdomen of the user lying on the bed 35. At least a part of the sensor 13 is located under the user lying on the bed 35.

2. Processing Performed by Respiration Monitoring Device 1 Processing performed by the respiration monitoring device 1 (particularly the control unit 5) will be described with reference to FIGS. The process shown in FIG. 5 is started when an operation unit (not shown) in the respiration monitor device 1 is operated.

In step 1 of FIG. 5, the signal acquisition unit 23 acquires a signal in one section from the sensor unit 3. The signals to be acquired are the signals of the plurality of sensors 13.
One section is as follows. The signal acquisition unit 23 periodically acquires signals from the sensor unit 3 at a sampling frequency of 10 Hz. The cycle in which the signal acquisition unit 23 acquires a signal from the sensor unit 3 is one cycle. One section is 256 cycles.

  In step 2, the filter unit 33 performs a filter process for selectively transmitting the frequency band including the respiration frequency with respect to the signal acquired in step 1. The frequency band including the frequency of respiration is a frequency band of 0.15 to 0.6 Hz. Filter processing is performed for each sensor 13. By the filtering process, it is possible to reduce the high-frequency component and the low-frequency component of the signal acquired in Step 1 above the respiration frequency band.

  In step 3, the peak frequency calculation unit 27 calculates a frequency power spectrum in the signal after performing the filtering process in step 2 by using fast Fourier transform. Further, the peak frequency calculation unit 27 calculates a peak frequency in the frequency power spectrum. The peak frequency is calculated for each sensor 13.

  In step 4, the determination unit 29 first creates a histogram representing the peak frequency distribution as shown in FIG. The horizontal axis of this histogram is the peak frequency calculated in step 3, and the vertical axis is the frequency of the peak frequency. One data in this histogram is a peak frequency calculated from one sensor 13.

  Next, the determination unit 29 determines whether or not the created histogram has a maximum value of 2 or more. The histogram shown in FIG. 6 is an example having two maximum values A and B. If the histogram has a maximum value of 2 or more, the process proceeds to step 5, and if the histogram has a maximum value of only 1, the process proceeds to step 7.

  In addition, as shown in FIG. 7, when there are two users 43 and 45 on the sensor unit 3, the histogram often has two maximum values. The reason is as follows. In the sensor unit 3, the load of the user 43 is applied to the region 47, and the load of the user 45 is applied to the region 49. The sensor 13 in the region 47 outputs a signal corresponding to the load of the user 43. The signal varies periodically according to the respiration of the user 43. Therefore, the peak frequency in the signal output from the sensor 13 in the region 47 corresponds to the cycle of the user 43 in breathing.

  On the other hand, the peak frequency in the signal output from the sensor 13 in the region 49 corresponds to the cycle of the user 45 in breathing. As a result, when there are two users 43 and 45 on the sensor unit 3, the histogram corresponds to the maximum value due to the peak frequency corresponding to the cycle of the user 43 and the cycle of the user 45. And a maximum value due to the peak frequency. The users 43 and 45 are, for example, children and their guardians.

In step 5, the cancellation unit 31 stops the calculation of the respiratory signal in the section in which the signal was acquired in the previous step 1.
In step 6, the determination unit 29 determines whether or not the measurement of all sections has been completed. Note that the number of sections to be measured is determined in advance. If the measurement for all the sections has been completed, the present process is terminated. If the measurement has not been completed, the process returns to step 1 to acquire the signal for the next section.

  If a negative determination is made in step 4, the process proceeds to step 7. In step 7, the respiration signal calculation unit 25 calculates a respiration signal using the signal after the filter processing in step 2. The method for calculating the respiratory signal is the method disclosed in Japanese Patent Application Laid-Open No. 2005-198781.

  In this method, first, the peak frequency for each sensor 13 calculated in step 3 is classified into a plurality of frequency bands. The plurality of frequency bands are, for example, a collection of frequency bands divided between 0.0 and 0.5 Hz in increments of 0.03 Hz.

  Next, each frequency band is associated with a sensor 13 that outputs a signal having a peak frequency belonging to that frequency band. Further, the number of sensors 13 associated with each frequency band is counted up. Next, the group of sensors 13 associated with the frequency band with the largest number of sensors 13 is defined as a sensor group SGm. Based on the output signals of the sensors 13 constituting the sensor group SGm, the sensors 13 constituting the sensor group SGm are grouped into phase groups PG1 to PG10 having a phase width of π / 5.

  Next, among the phase groups PG1 to PG10, a group having the largest number of sensors 13 belonging to the group is defined as PGmax. Let the sensors 13 belonging to PGmax be Sm1, Sm2, Sm3. Of the phase groups PG1 to PG10, sensors belonging to a group whose phase is shifted by π from PGmax are Sn1, Sn2, Sn3,.

  Next, a respiratory signal is calculated using Equation 1.

After step 7 ends, the process proceeds to step 6.
3. Effects of Respiratory Monitor Device 1 (1A) As described above, the case where there is a maximum value of 2 or more in the peak frequency distribution is a case where there is a high possibility that there are two or more users on the sensor unit 3 is there. If there are two or more users on the sensor unit 3, it is difficult to accurately calculate the respiratory signal as it is.

  When there is a maximum value of 2 or more in the peak frequency distribution, the respiration monitoring device 1 stops the calculation of the respiration signal in that section. Thereby, when there are two or more users on the sensor unit 3, it is possible to suppress the calculation of an incorrect respiratory signal.

(1B) The respiration monitor device 1 performs a filter process for selectively transmitting a frequency band including a respiration frequency with respect to a signal output from the sensor 13. As a result, the respiratory signal can be calculated more accurately.
Second Embodiment
1. Differences from the First Embodiment Since the basic configuration of the second embodiment is the same as that of the first embodiment, description of the common configuration will be omitted, and differences will be mainly described. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description is referred to.

  In the first embodiment described above, the control unit 5 includes a cancellation unit 31 as one of functions realized by the microcomputer 17 executing a program, as shown in FIG. In contrast, the second embodiment differs from the first embodiment in that a signal limiting unit 51 is provided instead of the cancellation unit 31 as shown in FIG.

2. Processing Performed by Respiration Monitor Device 1 Processing executed by the respiration monitoring device 1 of the second embodiment in place of the processing of the first embodiment (FIG. 5) will be described with reference to the flowchart of FIG. In addition, the process of S11-14, 16, 17 in FIG. 9 is the same as the process of S1-4, 6, 7 in FIG.

  In step 15, the signal limiting unit 51 selects one maximum value from two or more maximum values in the peak frequency distribution in the histogram. The criteria to be selected can be set as appropriate. For example, a maximum value corresponding to the sensor 13 close to a predetermined reference position in the sensor unit 3 can be selected. Further, the maximum value having the highest frequency of the peak frequency may be selected.

  Next, the signal limiting unit 51 specifies a peak P centered on one maximum value selected as described above in the distribution of peak frequencies. For example, in the example of the peak frequency distribution shown in FIG. 6, when the maximum value A is selected, the peak P centered on the maximum value A is specified. The peak P is a certain range at the peak frequency centered on the local maximum value A.

  Next, the signal limiting unit 51 selects a signal whose peak frequency belongs to the peak P identified as described above from the signals of the sensor 13. The selected signal is a signal corresponding to the peak P.

  Next, the signal limiting unit 51 calculates a respiratory signal using the signal selected as described above. The calculation method of the respiration signal is basically the same as step 7 in the first embodiment, but the signal used for calculating the respiration signal is limited to the signal selected as described above.

3. Effects of Respiratory Monitor Device 1 According to the second embodiment described in detail above, the following effects are obtained in addition to the effects (1B) of the first embodiment described above.

  (2A) As described above, the case where there are two or more maximum values in the peak frequency distribution is a case where there is a high possibility that there are two or more users on the sensor unit 3. If there are two or more users on the sensor unit 3, it is difficult to accurately calculate the respiratory signal as it is.

When there are two or more maximum values in the peak frequency distribution, the respiration monitoring device 1 limits the respiration signal to a signal corresponding to the peak P centered on one maximum value among the two or more maximum values. calculate. The signal corresponding to the peak P centered on one maximum value is a signal corresponding to one user. Thereby, even when there are two or more users on the sensor unit 3, the respiratory monitor device 1 can calculate an accurate respiratory signal for one of them.
<Third Embodiment>
1. Differences from the First Embodiment Since the basic configuration of the third embodiment is the same as that of the first embodiment, the description of the common configurations will be omitted, and differences will be mainly described. Note that the same reference numerals as those in the first embodiment indicate the same configuration, and the preceding description is referred to.

  In the third embodiment, as one of the functions realized by the microcomputer 17 executing a program, as shown in FIG. 10, in addition to the functions in the first embodiment, a state detection unit 53 is further provided. This is different from the first embodiment.

2. Processing Performed by Respiration Monitor Device 1 Processing executed by the respiratory monitoring device 1 of the third embodiment in place of the processing of the first embodiment (FIG. 5) will be described with reference to the flowchart of FIG.

  In step 21 of FIG. 11, the state detection unit 53 detects an initial state C. The state C means the total load applied to the sensor unit 3 and the pressure distribution in the sensor unit 3. The total load is the sum of the loads detected by the plurality of sensors 13. The pressure distribution is an aspect of the distribution of places in the sensor unit 3 where a load of a predetermined threshold value or more is applied to the sensor 13.

Steps 22 to 24 are the same as Steps 1 to 3 in the first embodiment.
In step 25, the state detection unit 53 detects the state C again.
In step 26, first, the state detection unit 53 calculates the amount of change from the initial state C detected in step 21 to the state C detected in the immediately preceding step 25 (hereinafter referred to as the amount of change in state C). calculate. The change amount of the state C is a change amount of the total load applied to the sensor unit 3 and a change amount of the pressure distribution in the sensor unit 3.

  Next, the state detection unit 53 determines whether or not the change amount of the total load and the change amount of the pressure distribution are larger than preset threshold values. If either one of the change amount of the total load and the change amount of the pressure distribution is larger than the threshold value, the process proceeds to step 27, and otherwise, the process proceeds to step 30.

  The case where the change amount of the total load is larger than the threshold value and the case where the change amount of the pressure distribution is larger than the threshold value are specific cases in which two or more users are present on the sensor unit 3. For example, there has been one user on the sensor unit 3 until then, and at time t, one more user rides on the sensor unit 3 and a total of two users exist on the sensor unit 3. In this case, as shown in FIG. 12, the total load greatly increases at time t.

  In addition, when there is one user on the sensor unit 3 until then, one more user rides on the sensor unit 3 and a total of two users are present on the sensor unit 3, FIG. As shown in FIG. 13, a range 55 to which pressure caused by a new user is applied moves with time, and the pressure distribution in the sensor unit 3 changes greatly. In addition, 57 is the range to which the pressure resulting from the user who existed on the sensor unit 3 from the beginning was added.

Steps 27 to 30 are the same as steps 4 to 7 in the first embodiment.
3. Effects exhibited by the respiratory monitoring device 1 According to the third embodiment described in detail above, the following effects are obtained in addition to the effects of the first embodiment described above.

  (3A) As described above, the case where the amount of change in the total load is larger than the threshold and the case where the amount of change in the pressure distribution is larger than the threshold are specific to a state where there are two or more users on the sensor unit 3. This is the case.

The respiratory monitor device 1 has a condition that the change amount of the total load is larger than the threshold value or the change amount of the pressure distribution is larger than the threshold value as one of the conditions for stopping the calculation of the respiratory signal. Thereby, it can be determined more accurately whether there are two or more users on the sensor unit 3.
<Fourth embodiment>
1. Differences from the Third Embodiment Since the basic configuration of the fourth embodiment is the same as that of the third embodiment, description of common configurations will be omitted, and differences will be mainly described. In addition, the same code | symbol as 3rd Embodiment shows the same structure, Comprising: Prior description is referred.

  In the third embodiment described above, the control unit 5 includes a cancellation unit 31 as one of functions realized by the microcomputer 17 executing a program, as shown in FIG. In contrast, the fourth embodiment differs from the third embodiment in that a signal limiting unit 51 is provided instead of the cancellation unit 31 as shown in FIG.

2. Processing Performed by Respiration Monitor Device 1 Processing executed by the respiratory monitoring device 1 of the fourth embodiment in place of the processing of the third embodiment (FIG. 11) will be described with reference to the flowchart of FIG. Note that the processing of S31 to 37, 39, and 40 in FIG. 15 is the same as the processing of S21 to 27, 29, and 30 in FIG.

In step 38, the signal limiting unit 51 calculates a respiratory signal using the limited signal in the same manner as in step 15 in the second embodiment.
3. Effects of Respiratory Monitor Device 1 According to the fourth embodiment detailed above, the effects of (1B) of the first embodiment, the effects of (2A) of the second embodiment, and ( The effect of 3A) is obtained.
<Other embodiments>
As mentioned above, although the form for implementing this indication was demonstrated, this indication is not limited to the above-mentioned embodiment, and can carry out various modifications.

(1) The sensor 13 may output a signal corresponding to vibration.
(2) In the third and fourth embodiments, the state C may be one of the total load and the pressure distribution. In step 26 of the third embodiment and step 36 of the fourth embodiment, it may be determined whether one of the change amounts is larger than a threshold value.

  (3) A plurality of functions of one constituent element in the above embodiment may be realized by a plurality of constituent elements, or a single function of one constituent element may be realized by a plurality of constituent elements. . Further, a plurality of functions possessed by a plurality of constituent elements may be realized by one constituent element, or one function realized by a plurality of constituent elements may be realized by one constituent element. Moreover, you may abbreviate | omit a part of structure of the said embodiment. In addition, at least a part of the configuration of the above embodiment may be added to or replaced with the configuration of the other embodiment. In addition, all the aspects included in the technical idea specified only by the wording described in the claims are embodiments of the present disclosure.

  (4) In addition to the above-described respiration monitor device, a system including the respiration monitor device as a constituent element, a program for causing a computer to function as the microcomputer 17 in the respiration monitor device, and a non-transitive semiconductor memory or the like in which the program is recorded The present disclosure can also be realized in various forms such as an actual recording medium and a respiration monitoring method.

DESCRIPTION OF SYMBOLS 1 ... Respiration monitor apparatus, 3 ... Sensor unit, 5 ... Control part, 7 ... Sheet protection member, 9 ... Sensor sheet, 11 ... Sensor selection part, 13 ... Sensor, 15 ... A / D conversion part, 17 ... Microcomputer, 19 ... Memory, 21 ... Display, 23 ... Signal acquisition unit, 25 ... Respiration signal calculation unit, 27 ... Peak frequency calculation unit, 29 ... Judgment unit, 31 ... Stop unit, 33 ... Filter unit, 35 ... Bed, 37 ... Placement part, 39 ... Back plate part, 41 ... Bedding, 43, 45 ... User, 47, 49 ... Area, 51 ... Signal limiting unit, 53 ... State detection unit

Claims (6)

A sensor unit in which a plurality of sensors that output a signal corresponding to a load or vibration are arranged;
A signal acquisition unit for acquiring the signal from the sensor unit;
A respiratory signal calculation unit for calculating a respiratory signal based on the signal;
For each sensor, a peak frequency calculation unit that calculates a peak frequency in a frequency power spectrum of the signal;
A determination unit for determining whether the distribution of the peak frequency calculated by the peak frequency calculation unit has a maximum value of 2 or more;
When the determination unit determines that the maximum value is 2 or more, a stop unit that stops the calculation of the respiratory signal by the respiratory signal calculation unit;
A respiratory monitor device comprising: A sensor unit in which a plurality of sensors that output a signal corresponding to a load or vibration are arranged;
A signal acquisition unit for acquiring the signal from the sensor unit;
A respiratory signal calculation unit for calculating a respiratory signal based on the signal;
For each sensor, a peak frequency calculation unit that calculates a peak frequency in a frequency power spectrum of the signal;
A determination unit for determining whether the distribution of the peak frequency calculated by the peak frequency calculation unit has a maximum value of 2 or more;
When the determination unit determines that the local signal has two or more local maximum values, the signal used by the respiratory signal calculation unit for calculating the respiratory signal is centered on one local maximum value in the peak frequency distribution. A signal limiting unit for limiting to the signal corresponding to the peak;
A respiratory monitor device comprising: A sensor unit in which a plurality of sensors that output a signal corresponding to a load or vibration are arranged;
A signal acquisition unit for acquiring the signal from the sensor unit;
A respiratory signal calculation unit for calculating a respiratory signal based on the signal;
For each sensor, a peak frequency calculation unit that calculates a peak frequency in a frequency power spectrum of the signal;
A determination unit for determining whether the distribution of the peak frequency calculated by the peak frequency calculation unit has a maximum value of 2 or more;
A state detection unit for detecting a change in total load applied to the plurality of sensors or a change in pressure distribution in the plurality of sensors;
When the determination unit determines that the maximum value is equal to or greater than 2, and the state detection unit detects a change in the total load or a change in the pressure distribution, the calculation of the respiration signal by the respiration signal calculation unit A cancellation unit to cancel
A respiratory monitor device comprising: A sensor unit in which a plurality of sensors that output a signal corresponding to a load or vibration are arranged;
A signal acquisition unit for acquiring the signal from the sensor unit;
A respiratory signal calculation unit for calculating a respiratory signal based on the signal;
For each sensor, a peak frequency calculation unit that calculates a peak frequency in a frequency power spectrum of the signal;
A determination unit for determining whether the distribution of the peak frequency calculated by the peak frequency calculation unit has a maximum value of 2 or more;
A state detection unit for detecting a change in total load applied to the plurality of sensors or a change in pressure distribution in the plurality of sensors;
When the determination unit determines that the local maximum value is equal to or greater than 2, and the state detection unit detects a change in the total load or a change in the pressure distribution, the respiration signal calculation unit calculates the respiration signal. A signal limiting unit that limits the signal used in the above to the signal corresponding to a peak centered on one local maximum in the peak frequency distribution;
A respiratory monitor device comprising: The respiratory monitoring device according to any one of claims 1 to 4,
A filter unit that performs a filter process for selectively transmitting a frequency band including a respiration frequency with respect to the signal;
The respiration monitor device, wherein the peak frequency calculation unit calculates the peak frequency using the signal after the filter processing. The respiratory monitoring device according to claim 5,
The respiratory monitoring device, wherein the frequency band is a frequency band including 0.15 to 0.6 Hz.

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