JP5781427B2 - How to measure bed occupancy - Google Patents

Description

  The present invention relates to a bed occupancy measurement method, a bed occupancy measurement device, and a bed occupancy measurement system for measuring the occupancy of a subject such as getting out of bed.

  Various methods are known as a method for measuring the bed situation of a subject (eg, elderly person, sick person, healthy person, infant) on the bed, such as bed rest, getting out of bed, and center of gravity (for example, Patent Documents 1 to 3). 6), and its basic configuration is as follows.

  Four load detectors (load detection means) are arranged on the floor surface of the bedroom as the room where the bed is arranged, in correspondence with the distance between the four leg portions of the bed. Next, each leg portion of the bed is installed (placed) on a load receiving portion provided on the upper surface of each load detector. And based on the load value output from these load detectors, the test subject's bed condition on a bed is measured. If, for example, the subject leaves the bed during this measurement, the load value output from the load detector becomes smaller than the reference value for the determination of getting out of bed, and as a result, an abnormal alarm (bedout alarm) that notifies the subject of getting out of bed is issued. The caregiver who hears this alarm knows that the subject has left the bed and can go to the subject for the care of the subject who has left the bed (including assistance).

  In this measurement method, in order to increase the accuracy of measurement of a subject's bed situation, the load value used for getting out of bed is generally determined when the subject is not on the bed, that is, the subject is on the bed. A load value obtained by performing a tare process using the weight of the bed when there is no tare, that is, a tare-treated load value is used (for example, refer to Patent Documents 7 and 8).

JP 2006-305343 A JP 2007-175208 A JP 2007-330658 A JP 2007-330659 A JP 2008-264338 A International Publication No. 2007/148638 Pamphlet Japanese Patent Laying-Open No. 2003-79585 (paragraph [0020]) JP 2011-010915 A (Claim 5)

  Thus, when the subject who is on the bed is, for example, a sick person or an elderly person, the caregiver must be present on the bed in order to perform an event such as rehabilitation, medical examination or examination. In many cases, the bed is moved from the bedroom to an event room such as a rehabilitation room, a doctor's office, or an examination room in the state of being left. At this time, in order to move the bed to a rehabilitation room or the like, each leg portion of the bed is lowered from the load receiving portion of each load detector onto the floor surface. Then, since the load value output from the load detector is smaller than the reference value for getting out of bed, an abnormal alarm (bedout alarm) is issued to notify the subject of getting out of bed. Therefore, when moving the bed, it is necessary to cancel the bed leaving determination.

  When the event such as rehabilitation, medical examination, and inspection is completed, the caregiver moves the bed from the event room to the bedroom while the subject is on the bed, and re-installs the bed on the load detector. Then, the judgment of getting out of bed is resumed. Here, in the conventional measuring apparatus, when the bed leaving determination is restarted, the bed weight (tare value) necessary for the tare processing is first measured. Therefore, in order to accurately measure the weight of the bed, the caregiver temporarily lowered the subject from the bed so that the subject is not on the bed, thereby loading the bed weight. After detection by the detector and measurement of the bed weight, the caregiver had to rest the subject on the bed again. As described above, when the caregiver resumes the determination of getting out of bed, the subject must be temporarily lowered from the bed, and a great burden is imposed.

  The present invention has been made in view of the above-described technical background, and the purpose of the present invention is to reduce the need for measuring the weight of a bed as a tare value when resuming a bed-related determination process such as bed leaving determination. An object of the present invention is to provide an in-situ state measuring method, an in-situ state measuring apparatus, and an in-situ state measuring system.

  The present invention provides the following means.

[1] A load detection step of detecting a load applied to the bed by a load detection means arranged on the lower side of the bed;
A bed weight measuring step of measuring the untarred processing load value output from the load detecting means when the subject is not on the bed as the weight of the bed;
A bed weight storage step of storing the bed weight measured in the bed weight measurement step in a bed weight storage means;
After the bed weight is stored in the bed weight storage means, the bed weight stored in the bed weight storage means is set as the tare value with respect to the untarred processing load value output from the load detection means. A taring process for processing;
A bed determination step for determining whether or not the subject has bedbed on the bed based on the tare-treated load value that has been tared in the tare treatment step;
When it is determined that the subject has bedbed on the bed in the bedside determination step, the weight storage step of storing the tare-treated load value at that time in the weight storage means as the weight of the subject;
When it is determined that the subject has bedbed on the bed in the bedside determination step, a bed-related determination step of performing a determination regarding the bed leaving of the subject on the bed based on the tared load value,
A pause determination step of determining whether or not a pause of the bed leaving determination step is instructed;
When it is determined in the temporary stop determination step that the temporary stop of the leaving bed related determination step is instructed, a temporary stop mode execution step of temporarily stopping the leaving bed related determination step;
When the temporary stop is released, a subtracted value obtained by subtracting the weight of the bed stored in the bed weight storage unit from the untarred processing load value output from the load detection unit and the subject stored in the weight storage unit And the same person determination step of determining whether or not the subject on the bed is the same person as the subject before being instructed to temporarily stop the bed leaving determination step, based on the weight of
The bed occupancy status measuring method, wherein when the subject on the bed is determined to be the same person in the same person determination step, the bed leaving determination step is resumed.

[2] The number of the load detecting means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
The temporary stop mode execution step includes
A first determination step of determining whether at least one untarred processing load value of all the untarred processing load values is equal to or greater than a predetermined first threshold;
When it is determined in the first determination step that at least one untarred processing load value is equal to or greater than the first threshold value, it is determined whether all the untarred processing load values are equal to or greater than a predetermined second threshold value. A second determination step;
The bed according to claim 1, further comprising: a first abnormality alarm generation step that issues an abnormality alarm when it is determined in the second determination step that at least one untare processing load value is not equal to or greater than the second threshold value. Method of measuring the presence of the floor.

[3] The temporary stop mode execution step includes:
A third determination step of determining whether or not a variation amount of all untarred processing load values within a predetermined time is within a predetermined first range;
The presence of the bed according to claim 2, further comprising a temporary stop automatic release step of automatically releasing the temporary stop when it is determined in the third determination step that all the fluctuation amounts are within the first range. Floor condition measurement method.

[4] The same person determination step includes:
A fourth determination step of determining whether or not a difference between the subtracted value and the weight of the subject stored in the weight storage means is within a predetermined second range, and the difference is determined in the fourth determination step; 4. The bed occupancy state measuring method according to any one of the preceding items 1 to 3, wherein when it is determined to be within the second range, the subject on the bed is determined to be the same person.

[5] The same person determination step includes:
A bed having a fifth determination step for determining whether or not the subtraction value is equal to or greater than a predetermined third threshold, and when the subtraction value is determined to be equal to or greater than the third threshold in the fifth determination step; To determine whether the subject above is the same person,
Furthermore, the same person determination step includes
A second abnormal alarm generation step for generating an abnormal alarm when it is determined that the subject on the bed is not the same person;
When it is determined that the subject on the bed is not the same person, a restart instruction determination step for determining whether or not the restart of the bed related determination step is instructed,
If it is determined in the restart instruction determination step that the resumption of the bed leaving determination step has been instructed, the subtraction value is re-stored in the weight storage means as the weight of the subject, and then the step of resuming the bed leaving determination is restarted. The bed presence measuring method of the bed in any one of 1-4.

  [6] When the subtraction value is re-stored in the body weight storage means as the body weight of the subject and then the bed leaving determination process is restarted, when it is first determined that the subject on the bed has left the bed, 6. The bed occupancy status measuring method according to item 5 above, returning to the weight measurement step.

[7] The temporary stop mode execution step includes:
An elapsed time determining step for determining whether or not an elapsed time from when the bed leaving related determining step is temporarily stopped is within a predetermined stop time; and
A third abnormal alarm generation step for generating an abnormal alarm when it is determined in the elapsed time determination step that the elapsed time is not within the stop time;
An extension instruction determination step for determining whether or not an extension of the stop time has been instructed when the elapsed time is determined not to be within the stop time in the elapsed time determination step,
The bed occupancy state measuring method according to any one of the preceding items 1 to 6, wherein when the extension instruction is determined to be instructed in the extension instruction determining step, the stop time is extended.

[8] The number of the load detection means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
If it is determined in the temporary stop determination step that the temporary stop of the bed leaving determination step is not instructed, at least one untarred processing load value output from the plurality of load detection means is equal to or less than a predetermined fourth threshold value. A sixth determination step for determining whether or not
A fourth abnormality alarm generation step for generating an abnormality alarm when it is determined in the sixth determination step that at least one untare processing load value is equal to or less than the fourth threshold;
When it is determined in the sixth determination step that at least one untare processing load value is equal to or less than the fourth threshold value, when the suspension of the bed leaving determination step is instructed, the process proceeds to the temporary stop mode execution step. On the other hand, if the temporary stop of the bed leaving determination step is not instructed, the bed occupancy state measuring method according to any one of the preceding items 1 to 7 which returns to the bed weight measurement step.

  [9] After the subject on the bed is determined to be the same person in the step of determining the same person, the bed-related determination step is resumed, and when it is first determined that the subject on the bed has left the bed, 9. The bed occupancy state measuring method according to any one of the preceding items 1 to 8, which returns to the weight measurement step.

[10] The method includes a second temporary stop determination step for determining whether or not a temporary stop of the bed leaving determination step is instructed when it is determined in the bed determination step that the subject is not lying on the bed. ,
When it is determined in the second temporary stop determination step that the temporary stop of the bed leaving related determination step is instructed, the process proceeds to the temporary stop mode execution step,
The pause mode execution step includes a weight memory determination step for determining whether the weight of the subject is stored in the weight storage means,
10. The bed occupancy state measuring method according to any one of the preceding items 1 to 9, wherein the body weight of the subject is determined not to be stored in the body weight storage means in the body weight storage determination step, and the process returns to the bed weight measurement step.

[11] The number of the load detecting means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
When it is determined in the second temporary stop determination step that the temporary stop of the bed leaving determination step is not instructed, at least one untarred processing load value output from the plurality of load detection means is a predetermined fifth value. A seventh determination step of determining whether or not the threshold is equal to or less than a threshold;
A fifth abnormality alarm generation step for generating an abnormality alarm when it is determined in the seventh determination step that at least one untarred processing load value is equal to or less than the fifth threshold;
When it is determined in the seventh determination step that at least one untare processing load value is equal to or less than the fifth threshold value, when the suspension of the bed leaving determination step is instructed, the process proceeds to the temporary stop mode execution step. On the other hand, the bed occupancy state measuring method according to item 10 above, wherein the process returns to the bed weight measurement step when the temporary stop of the bed leaving determination step is not instructed.

[12] A load detection means that is disposed under the bed and detects a load applied to the bed,
Bed weight measuring means for measuring the untarred processing load value output from the load detecting means when the subject is not on the bed as the weight of the bed;
Bed weight storage means for storing the weight of the bed measured by the bed weight measurement means;
After the bed weight is stored in the bed weight storage means, the bed weight stored in the bed weight storage means is set as the tare value with respect to the untarred processing load value output from the load detection means. A tare processing means for processing;
A bed determining means for determining whether or not the subject has bedbed on the bed based on the tared load value that has been tared by the tare processing means;
When it is determined that the subject has bedbed on the bed by the bedside determining means, the weight storage means for storing the tare-treated load value at that time as the weight of the subject,
When it is determined that the subject has bedbed on the bed by the bed-determining unit, the bed-related determining unit that makes a determination on the bed of the subject on the bed based on the tared load value;
A pause determination unit that determines whether or not an instruction to pause the operation of the bed leaving determination unit is given;
A pause mode execution means for temporarily stopping the operation of the bed leaving determination means when it is determined by the pause determination means that a pause of the operation of the bed leaving determination means has been instructed;
When the temporary stop is released, a subtracted value obtained by subtracting the weight of the bed stored in the bed weight storage unit from the untarred processing load value output from the load detection unit and the subject stored in the weight storage unit And a same person determining means for determining whether or not the subject on the bed is the same person as the subject before being instructed to temporarily stop the operation of the bed leaving determination means based on the weight of the person ,
When the same person determining means determines that the subject on the bed is the same person, the operation of the bed leaving relation determining means is resumed.

[13] The number of the load detecting means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
The temporary stop mode execution means includes
First determination means for determining whether or not at least one untarred processing load value among all the untarred processing load values is equal to or greater than a predetermined first threshold;
When it is determined by the first determination means that at least one untarred processing load value is equal to or greater than the first threshold value, it is determined whether all the untarred processing load values are equal to or greater than a predetermined second threshold value. A second determination means;
The bed according to claim 12, further comprising: a first abnormality alarm generation unit that issues an abnormality alarm when the second determination unit determines that at least one untarred processing load value is not equal to or greater than the second threshold value. In-bed situation measuring device.

[14] The suspension mode execution means includes:
Third determination means for determining whether or not the variation amount of all untarred processing load values within a predetermined time is within a predetermined first range;
The bed according to claim 13, further comprising: a temporary stop automatic canceling unit that automatically cancels the temporary stop when the third determination unit determines that all the fluctuation amounts are within the first range. Floor condition measuring device.

[15] The same person determination means includes
The apparatus further comprises fourth determination means for determining whether or not the difference between the subtracted value and the weight of the subject stored in the weight storage means is within a predetermined second range, and the difference is determined by the fourth determination means. 15. The bed occupancy status measuring device according to any one of the preceding items 12 to 14, wherein when it is determined that the subject is within the second range, the subject on the bed is determined to be the same person.

[16] The same person determination means includes
When the fifth determination unit determines whether the subtraction value is equal to or greater than a predetermined third threshold and the fifth determination unit determines that the subtraction value is equal to or greater than the third threshold, To determine whether the subject above is the same person,
Furthermore, the same person determination means includes
A second abnormal alarm generating means for generating an abnormal alarm when it is determined that the subject on the bed is not the same person;
When it is determined that the subject on the bed is not the same person, a restart instruction determination unit that determines whether or not the restart of the operation of the bed leaving determination unit is instructed,
When it is determined by the restart instruction determination means that the resumption of the operation of the bed leaving relation determining means is instructed, the subtraction value is re-stored in the weight storage means as the weight of the subject, and then the operation of the bed leaving related determination means The bed occupancy state measuring apparatus according to any one of the preceding items 12 to 15, wherein the bed is resumed.

  [17] When the subtraction value is re-stored in the body weight storage means as the body weight of the subject and then the operation of the bed leaving determination means is restarted, when it is first determined that the subject on the bed has left the bed, 17. The bed occupancy status measuring device according to item 16 above, wherein the bed weight measuring means is operated again.

[18] The temporary stop mode execution means includes:
Elapsed time determination means for determining whether or not an elapsed time from when the operation of the bed leaving determination means is temporarily stopped is within a predetermined stop time;
A third abnormal alarm generating means for generating an abnormal alarm when the elapsed time determining means determines that the elapsed time is not within the stop time;
When the elapsed time determining means determines that the elapsed time is not within the stop time, it comprises an extension instruction determining means for determining whether or not an extension of the stop time has been instructed.
18. The bed occupancy status measuring device according to any one of items 12 to 17, wherein the stop time is extended when it is determined that extension is instructed by the extension instruction determination unit.

[19] The number of the load detection means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
If it is determined by the temporary stop determination means that the temporary stop of the operation of the bed leaving determination means is not instructed, at least one untarred processing load value output from the plurality of load detection means is a predetermined fourth value. Sixth determination means for determining whether or not the value is equal to or less than a threshold;
A fourth abnormality alarm generating means for issuing an abnormality alarm when the sixth determination means determines that at least one untare processing load value is equal to or less than the fourth threshold;
When it is determined by the sixth determination means that at least one untarred processing load value is equal to or less than the fourth threshold value, the temporary stop mode execution means is instructed to pause the operation of the bed leaving determination means. On the other hand, if the temporary stop of the operation of the bed leaving determination unit is not instructed, the bed weight measuring unit is restarted. apparatus.

  [20] After the subject on the bed is determined to be the same person by the same person determination unit, when the operation on the bed related determination unit is resumed, when it is first determined that the subject on the bed has left the bed, 20. The bed occupancy status measuring device according to any one of items 12 to 19 above, wherein the bed weight measuring means is reactivated.

[21] Second temporary stop determining means for determining whether or not the temporary stop of the operation of the bed related determining means is instructed when it is determined by the bed determining means that the subject is not lying on the bed. And
When it is determined by the second temporary stop determination means that the temporary stop of the operation of the bed leaving determination means is instructed, the temporary stop mode execution means is operated,
The pause mode execution means includes weight memory determination means for determining whether or not the weight of the subject is stored in the weight storage means,
21. The bed according to any one of the preceding items 12 to 20, wherein when the weight memory determination means determines that the subject's weight is not stored in the weight storage means, the bed weight measurement means is re-operated. In-situ measurement device.

[22] The number of the load detecting means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
When it is determined by the second temporary stop determination means that the temporary stop of the operation of the bed leaving determination means is not instructed, at least one untare processing load value output from the plurality of load detection means is a predetermined value. Seventh determination means for determining whether or not the fifth threshold value or less;
A fifth abnormality alarm generation means for issuing an abnormality alarm when the seventh determination means determines that at least one untare processing load value is equal to or less than the fifth threshold;
When it is determined by the seventh determination means that at least one untare processing load value is equal to or less than the fifth threshold value, the temporary stop mode execution means is instructed to pause the operation of the bed leaving determination means On the other hand, the bed occupancy state measuring device according to the preceding item 21 in which the bed weight measuring unit is re-operated unless a temporary stop of the operation of the bed leaving relation determining unit is instructed.

[23] A load detection means that is disposed under the bed and detects a load applied to the bed,
Bed weight measuring means for measuring the untarred processing load value output from the load detecting means when the subject is not on the bed as the weight of the bed;
Bed weight storage means for storing the weight of the bed measured by the bed weight measurement means;
After the bed weight is stored in the bed weight storage means, the bed weight stored in the bed weight storage means is set as the tare value with respect to the untarred processing load value output from the load detection means. A tare processing means for processing;
A bed determining means for determining whether or not the subject has bedbed on the bed based on the tared load value that has been tared by the tare processing means;
When it is determined that the subject has bedbed on the bed by the bedside determining means, the weight storage means for storing the tare-treated load value at that time as the weight of the subject,
When it is determined that the subject has bedbed on the bed by the bed-determining unit, the bed-related determining unit that makes a determination on the bed of the subject on the bed based on the tared load value;
A pause determination unit that determines whether or not an instruction to pause the operation of the bed leaving determination unit is given;
A pause mode execution means for temporarily stopping the operation of the bed leaving determination means when it is determined by the pause determination means that a pause of the operation of the bed leaving determination means has been instructed;
When the temporary stop is released, a subtracted value obtained by subtracting the weight of the bed stored in the bed weight storage unit from the untarred processing load value output from the load detection unit and the subject stored in the weight storage unit And a same person determining means for determining whether or not the subject on the bed is the same person as the subject before being instructed to temporarily stop the operation of the bed leaving determination means based on the weight of the person ,
The bed occupancy status measuring system, wherein when the same person determining means determines that the subject on the bed is the same person, the operation of the bed related determining means is resumed.

  The present invention has the following effects.

  According to the measurement method of [1], in the same person determination process, when the suspension of the bed leaving determination process is released, subtraction is performed by subtracting the bed weight stored in the bed weight storage means from the untarred processing load value. Based on the value and the body weight of the subject stored in the weight storage means, it is determined whether or not the subject on the bed is the same person as the subject before the suspension-related determination step is instructed. And when it determines with the test subject on a bed being the same person in the same person determination process, a bed leaving relevant determination process is restarted. Therefore, it is not necessary to measure the weight of the bed as a tare value necessary for the tare processing (that is, the bed weight measuring step) when restarting the bed leaving determination process. Therefore, the caregiver does not have to bother to take the subject off the bed when restarting the bed-related determination process, and thus the burden on the caregiver can be reduced.

  Furthermore, when it is determined that the subject on the bed in the same person determination step is the same person as the subject before being instructed to temporarily stop the bed-related determination step, the bed-related determination step can be resumed, When it is determined that the subjects on the bed are not the same person, that is, different from each other, it is possible not to resume the bed leaving determination process.

  According to the measurement method of [2], the temporary stop mode execution step includes a first determination step, a second determination step, and a first abnormality alarm generation step, so that the caregiver detects all loads in the bed. It can be determined whether or not it is securely installed in the load receiving portion of the means.

  That is, when the bed is moved from the load detecting means during the temporary stop mode execution step, at least one untarred processing load value of all the untarred processing load values is equal to or more than the first threshold value in the first determination step. If it is determined that there is, it is determined that re-installation work on the bed load detection means has been started, and the process proceeds to the second determination step. If it is determined in the second determination step that at least one untare processing load value is not equal to or greater than the second threshold value, the bed is properly installed in the load receiving portion of at least one load detection means among the plurality of load detection means. If not, an abnormal alarm is issued in the first abnormal alarm generation step. The caregiver who hears this abnormal alarm knows that the bed is not properly installed in the load receiving portion of at least one load detection means, and can correct the installation position of the bed. This makes it possible to accurately measure the presence of the subject, such as the determination of the subject's bed leaving. Thus, the caregiver can determine whether or not the bed is properly installed in the load receiving portions of all the load detection means depending on whether or not an abnormal alarm is issued.

  According to the measurement method of [3], the temporary stop mode execution step is a third determination step of determining whether or not the amount of variation within a predetermined time of all untare processing load values is within a predetermined first range. And a temporary stop automatic canceling step of automatically canceling the temporary stop when it is determined in the third determining step that all the fluctuation amounts are within the first range. Therefore, when the subject is resting on the bed, it is determined in the third determination step that all fluctuations are within the first range, and as a result, the temporary stop is automatically released in the automatic pause release step. Therefore, the caregiver does not need to perform a temporary suspension release operation. Therefore, the burden on the caregiver can be further reduced.

  According to the measurement method of [4], the same person determination step determines whether or not the difference between the subtraction value and the weight of the subject stored in the weight storage means is within a predetermined second range. In addition to providing a step, if it is determined in the fourth determination step that the difference is within the second range, it is determined that the subjects on the bed are the same person. Thereby, it can be determined correctly whether the test subject on a bed is the same person.

  According to the measurement method of [5], the same person determination step includes a fifth determination step for determining whether or not the subtraction value is equal to or greater than a predetermined third threshold value. If it is determined that the threshold is 3 or more, it is determined whether or not the subject on the bed is the same person. Therefore, in the fifth determination step, it can be determined whether or not the subject (person) is on the bed. That is, when it is determined in the fifth determination step that the subtraction value is equal to or greater than the third threshold, it is found that the subject (person) is on the bed, and then the subject on the bed is the same person. It is determined whether or not there is. On the other hand, when it is determined in the fifth determination step that the subtraction value is not greater than or equal to the third threshold value, it can be seen that the subject (person) is not present on the bed.

  Furthermore, since the same person determination step includes a second abnormal alarm generation step for generating an abnormal alarm when it is determined that the subject on the bed is not the same person, the caregiver who heard this abnormal alarm The subject above is not the same person, or the subject on the bed is the same person, but a fall prevention fence is newly attached to the bed, or an object (eg luggage, inspection instrument, futon) is newly added on the bed It is possible to know that the weight of the bed as the tare value has changed due to being put on the vehicle.

  Further, the same person determination step includes a restart instruction determination step for determining whether or not the resumption of the bed leaving determination process is instructed when it is determined that the subject on the bed is not the same person. If it is determined in the process that the resumption of the bed leaving determination process is instructed, the subtraction value is stored again in the body weight storage means as the weight of the subject, and then the bed leaving related determination process is restarted. Therefore, even if the subjects on the bed are not the same person, or the bed weight (tare value) has changed, the bed weight measurement (bed weight) The bed-related determination process can be restarted without performing the measurement process. Therefore, a caregiver's burden can be reduced.

  According to the measurement method of [6], in the case where the subtraction value is re-stored in the body weight storage means as the weight of the subject in accordance with the same person determination step in the measurement method of [5], and then the bed leaving determination step is resumed. When it is first determined that the subject on the bed has left the bed, the process returns to the bed weight measurement process. For example, even if the bed weight (tare value) changes, the bed weight is measured. It can be measured in the process (i.e., the bed weight is re-measured). Furthermore, since it is determined that the subject on the bed has left the bed before the bed weight measurement step, the subject has already left the bed at the time of the bed weight measurement step. Therefore, the caregiver does not need to take the subject off the bed. Therefore, no burden is placed on the caregiver.

  According to the measurement method of [7], it is determined that the elapsed time from when the bed leaving determination step is temporarily stopped in the elapsed time determination step is not within a predetermined stop time (that is, exceeds the predetermined stop time). In this case, an abnormal alarm is issued in the third abnormal alarm generation process. Therefore, the other caregiver who heard this abnormal alarm must have moved to the rehabilitation room, examination room, diagnosis room, etc. This makes it possible for the other caregiver to guess that an abnormal situation or the like has occurred with respect to the subject or the caregiver and to go to the subject for resolution or help. Furthermore, the temporary stop mode execution step includes an extension instruction determination step for determining whether or not an extension of the stop time has been instructed. When it is determined that the extension has been instructed in the extension instruction determination step, the stop time is extended. Thus, the stop time can be extended when the caregiver instructs the extension of the stop time as necessary.

  According to the measurement method of [8], when it is determined in the temporary stop determination step that the temporary stop of the bed leaving determination step is not instructed, whether or not at least one untarred processing load value is equal to or less than the fourth threshold value. A sixth determination step for determining whether or not and a fourth abnormality alarm generation step for generating an abnormality alarm when it is determined in the sixth determination step that at least one untarred processing load value is equal to or less than a fourth threshold value. ing. Therefore, for example, the caregiver forgets to instruct to stop the bed leaving determination process and moves the bed in which the subject is present from the load detecting means. As a result, at least one untarred load value is obtained. When the value is lower than the fourth threshold, an abnormal alarm can be issued in the fourth abnormal alarm generation step. The caregiver who has heard this abnormal alarm can know that he has forgotten to perform a temporary stop instruction operation.

  Furthermore, when it is determined in the sixth determination step that at least one untare processing load value is equal to or less than the fourth threshold value, when a temporary stop of the bed leaving related determination step is instructed, the process proceeds to a temporary stop mode execution step, On the other hand, if it is not instructed to pause the bed leaving determination process, the process returns to the bed weight measurement process. For example, the caregiver forgets to perform the pause instruction operation and moves the bed where the subject is present from the load detection means. Even when the caregiver is instructed to perform the temporary stop mode operation process, the caregiver can perform the temporary stop instruction operation, and can return to the bed weight measurement process by not performing the temporary stop instruction operation. it can.

  According to the measurement method of [9], when the subject on the bed is determined to be the same person in the same person determination step and then the bed leaving determination step is resumed, it is first determined that the subject on the bed has left the bed. The bed weight measurement process returns to the bed weight measurement process. For example, the bed weight (tare value) actually changed during execution of the pause mode, but the amount of change is small. Even if it is determined, the correct bed weight can be measured in the returned bed weight measurement process. Therefore, accurate tare processing can be performed using the changed weight of the bed as the tare value, thereby increasing the accuracy of the measurement of the occupancy status such as the determination of bed leaving. Furthermore, since it is determined that the subject on the bed has left the bed before the bed weight measurement step, the subject has already left the bed at the time of the bed weight measurement step. Therefore, the caregiver does not need to take the subject off the bed. Therefore, no burden is placed on the caregiver.

  According to the measurement method of [10], even when it is determined that the subject is not lying on the bed in the bed determining step, when it is determined that the pause is instructed in the second pause determination step. The process can be shifted to the temporary stop mode execution process. Further, the pause mode execution step includes a weight memory determination step for determining whether or not the weight of the subject is stored in the weight storage means, and the weight of the subject is stored in the weight storage means in the weight memory determination step. If it is determined that it has not been performed, the process returns to the bed weight measurement process. Therefore, in the case where the weight of the subject has not been stored in the weight storage means even after the measurement has been started, that is, when it has not been determined that the subject has been bedridden on the bed even after the measurement has been started, When it is determined in the stop determination step that a pause is instructed, the weight memory determination step can return to the bed weight measurement step. As a result, even if the bed is moved from the load detection means when the subject is not on the bed, an abnormal alarm (bedout alarm) notifying that the subject is getting out of bed is not generated. On the other hand, when the subject's weight is stored in the weight storage means at least once after the measurement is started, that is, when it is determined that the subject has been bedridden on the bed at least once after the measurement is started. When it is determined that the suspension is instructed in the second pause determination process, the process may sequentially shift to the pause mode execution process and the same person determination process regardless of whether or not the subject is on the bed. it can.

  According to the measurement method of [11], when it is determined in the second temporary stop determination step that the temporary stop of the bed leaving determination step is not instructed, at least one untarred processing load value is equal to or less than the fifth threshold value. A seventh determination step for determining whether or not, a fifth abnormality alarm generation step for generating an abnormality alarm when it is determined in the seventh determination step that at least one untarred processing load value is equal to or less than a fifth threshold value; It has. Therefore, for example, the caregiver forgets to perform an instruction operation to pause the bed leaving determination process and moves the bed where the subject is not present from the load detection means, so that at least one untarred processing load value is obtained. When the value is equal to or lower than the fifth threshold value, an abnormal alarm can be issued in the fifth abnormal alarm generation step. The caregiver who has heard this abnormal alarm can know that he has forgotten to perform a temporary stop instruction operation.

  Furthermore, when it is determined in the seventh determination step that at least one untare processing load value is equal to or less than the fifth threshold value, when the suspension of the bed leaving determination step is instructed, the process proceeds to the temporary stop mode execution step, On the other hand, if it is not instructed to pause the bed leaving determination process, the process returns to the bed weight measurement process. For example, the caregiver forgets to perform the pause instruction operation and moves the bed where the subject is not present from the load detection means. Even when the caregiver is instructed to perform the temporary stop mode operation process, the caregiver can perform the temporary stop instruction operation, and can return to the bed weight measurement process by not performing the temporary stop instruction operation. it can.

  The measurement devices [12] to [22] can reliably execute the measurement methods [1] to [11], respectively.

  The measurement system of [23] can reliably execute the measurement method of [1].

FIG. 1 is a schematic view showing a bed occupancy state measuring apparatus according to an embodiment of the present invention. FIG. 2 is a block diagram showing the configuration of the measurement apparatus. FIG. 3 is a main flowchart showing the basic operation of the measurement apparatus. FIG. 4 is a flowchart showing details of the bed determining step shown in FIG. FIG. 5 is a flowchart showing details of the pause determination step and the pause mode execution step shown in FIG. FIG. 6 is a flowchart showing a continuation of the flowchart shown in FIG.

  Next, an embodiment of the present invention will be described below with reference to the drawings.

  As shown in FIG. 1, a bed occupancy status measuring device 80 according to an embodiment of the present invention measures the occupancy status of a subject H on a bed 70. Examples of the presence of the subject H include bed rest, prediction of getting out of bed, getting out of bed, and the position of the center of gravity of the subject H on the bed 70. The bed occupancy status measuring system 81 according to an embodiment of the present invention includes the measuring device 80 of the present embodiment.

  The bed 70 is used in a medical facility (for example, a hospital), an elderly facility, a nursing facility, a general household, and the like, and includes four head portions, a head side left leg portion 71A, a head side right leg portion 71B, It has a foot side left leg portion 71C and a foot side right leg portion 71D. At the lower end of each leg, a bed moving caster 72 is provided in a fixed state so that the bed 70 can move smoothly on the floor surface 75. The subject H stays on the bed 70 for sleeping, that is, sits on the bed 70. In the present embodiment, the room in which the bed 70 is disposed is, for example, a bedroom (including a hospital room). Examples of the subject H include elderly people, sick people, healthy people, infants and the like.

  As shown in FIGS. 1 and 2, the measurement device 80 of the present embodiment includes a load detection unit 1, a control unit 2, an instruction operation unit 50, and the like.

<Configuration of load detecting means 1>
The configuration of the load detection means 1 will be described in detail as follows.

  That is, as shown in FIG. 1, the load detecting means 1 is arranged below the bed 70, detects a load applied to the bed 70, and sets a load value corresponding to the load as an untarred processing load value for a predetermined time. (Example: 0.005 to 10 s) is output continuously. In the present embodiment, the number of load detection means 1 is four, and more specifically, the load detection means 1 includes four load detectors 1A to 1D. Each of these load detectors 1A to 1D has four portions spaced apart from each other in the bed 70, such as a head-side left leg 71A, a head-side right leg 71B, a foot-side left leg 71C, and a foot-side right. The load applied to the leg 71D is detected.

  Each of the load detectors 1A to 1D is a known load cell type, and is disclosed in Japanese Patent Laid-Open No. 2006-302266, Japanese Patent Laid-Open No. 2007-167492, Japanese Patent Laid-Open No. 2008-12202, and the like. is there.

  Load receiving portions 1a are provided on the upper surfaces of the load detectors 1A to 1D. Each of the load detectors 1A to 1D is applied to the corresponding leg portion of the bed 70 by installing (mounting) the corresponding leg portion (specifically, the caster 72) of the bed 70 on the load receiving portion 1a. The load can be detected. These load detectors 1 </ b> A to 1 </ b> D are arranged on the floor surface 75 of the bedroom so as to be separated from each other corresponding to the spacing between the four legs of the bed 70.

  For convenience of explanation, as shown in FIG. 2, in these load detectors 1 </ b> A to 1 </ b> D, the head side left leg portion 71 </ b> A, the head side right leg portion 71 </ b> B, the foot side left leg portion 71 </ b> C and the foot side right side of the bed 70. The load detectors that detect the load applied to the leg portion 71D are “first load detector 1A”, “second load detector 1B”, “third load detector 1C”, and “fourth load detector 1D”, respectively. " The load value output from each of the load detectors 1A to 1D is sent to the control means 2 from the load detectors 1A to 1D via a wired or wireless communication unit (not shown) as an untarred processing load value for a predetermined time (example) : 0.005 to 10 s).

<Configuration of control means 2>
The configuration of the control means 2 will be described in detail with reference to FIG.

  That is, the control means 2 comprises a controller equipped with a microcomputer having ROM, RAM, CPU, etc., and includes a bed weight measuring means 3, a bed weight storage means 4, a tare processing means 5, a saddle bed determining means 6, A weight storage unit 7, a bed leaving determination unit 10, a pause determination unit 8, a pause mode execution unit 20, a same person determination unit 30, and the like are provided. The microcomputer is preinstalled with a predetermined program for executing predetermined determination, calculation (calculation), control, and the like necessary for measuring the presence of the subject H on the bed 70. This control means 2 is usually installed in the vicinity of the bed 70, a place where caregivers (including nurses) are packed, and the like.

  The bed weight measuring means 3 is the untarred processing load output from the four load detectors 1A to 1D when the subject H is not on the bed 70, that is, when the subject H is not on the bed 70. Each value is measured as a component value of the weight A of the bed 70, and the untarred processing total load value obtained by totaling the four untarred processing load values output from the first to fourth load detectors 1A to 1D is obtained as the bed 70. It is measured as the weight A of

  The bed weight storage means 4 stores the weight A of the bed 70 measured by the bed weight measurement means 3 and its component values.

  After the weight A of the bed 70 is stored in the bed weight storage unit 4, the tare processing unit 5 stores the untarred processing load value output from the load detection unit 1 in the bed weight storage unit 4. Tare processing is performed using the weight A of the bed 70 as the tare value. More specifically, the tare processing means 5 is a component of the weight A of the bed 70 as a tare value from the untarred processing load values output from the first to fourth load detectors 1A to 1D as the load detection means 1. The value is subtracted. Specifically, the untarred processing load values output from the first to fourth load detectors 1A to 1D are W1, W2, W3, and W4, respectively, and the untarred processing load values W1, W2, W3, and W4 are set. The tare processing means 5 subtracts A1, A2, A3 and A4 from W1, W2, W3 and W4, respectively, when the component values of the weight A of the bed 70 included in the bed are A1, A2, A3 and A4, respectively. It is. That is, the tare processed load values that are tared by the tare processing means 5 with respect to the untarred processing load values W1, W2, W3, and W4 output from the first to fourth load detectors 1A to 1D are respectively W1-A1, W2-A2, W3-A3, and W4-A4.

  Here, the total unloading load value W and the untarred processing total load value W obtained by adding the four untarred processing load values W1, W2, W3, and W4 output from the first to fourth load detectors 1A to 1D. On the other hand, the tare processed total load value FW that has been tared by the tare processing means 5 and the weight A of the bed 70 are expressed as follows.

・ W = W1 + W2 + W3 + W4
FW = W−A = (W1−A1) + (W2−A2) + (W3−A3) + (W4−A4)
A = A1 + A2 + A3 + A4.

  The heel bed determination means 6 is a tare processed load value (W1−) that has been tared by the tare processing means 5 with respect to the untarred processing load values W1 to W4 output from the first to fourth load detectors 1A to 1D. A1, W2-A2, W3-A3, W4-A4) based on whether or not the subject H is lying on the bed 70 for sleeping, that is, whether or not the subject H is lying on the bed 70 Judgment.

  The weight storage means 7 stores the tare-processed total load value FW at that time as the weight B of the subject H when the subject determination means 6 determines that the subject H is lying on the bed 70.

  When the bed determining unit 6 determines that the subject H has bedbed on the bed 70, the bed leaving determination unit 10 sets the tare-treated load values (W1-A1, W2-A2, W3-A3, W4-A4). Based on the determination, the subject H on the bed 70 is determined to get out of bed.

  The temporary stop determination means 8 determines whether or not the temporary stop of the operation of the bed leaving relation determination means 10 has been instructed.

  The temporary stop mode execution means 20 executes the temporary stop mode in which the operation of the bed leaving determination means 10 is paused when it is determined by the temporary stop determination means 8 that an instruction to pause the operation of the bed leaving determination means 10 has been issued. Is.

  When the temporary stop of the operation of the bed leaving determination unit 10 is released, the same person determination unit 30 adds up the four untarred processing load values W1 to W4 output from the first to fourth load detectors 1A to 1D. The subtracted value D obtained by subtracting the weight A of the bed 70 stored in the bed weight storage means 4 from the untarred processing total load value W (ie, D = W−A) and the weight of the subject H stored in the weight storage means 7 Based on B, it is determined whether or not the subject H on the bed 70 is the same person as the subject before the temporary stop of the operation of the bed leaving determination unit 10 is instructed.

  Further, the control unit 2 includes a sixth determination unit 40, a fourth abnormal alarm generation unit 41, a second temporary stop determination unit 42, a seventh determination unit 43, a fifth abnormal alarm generation unit 44, and a sixth abnormal alarm generation unit 45. Etc.

  When it is determined by the temporary stop determination unit 8 that the temporary stop of the operation of the bed leaving determination unit 10 is not instructed, the sixth determination unit 40 is at least output from the first to fourth load detectors 1A to 1D. It is determined whether one untarred processing load value is equal to or less than a predetermined fourth threshold value.

  The fourth abnormality alarm generation means 41 has a speaker, and issues an abnormality alarm when the sixth determination means 40 determines that at least one untarred processing load value is equal to or less than the fourth threshold value. .

  When the bed determining unit 6 determines that the subject H is not lying on the bed 70, the second temporary stop determining unit 42 determines whether or not an instruction to pause the operation of the bed leaving determination unit 10 has been issued. Is.

  The seventh determination means 43 is output from the first to fourth load detectors 1A to 1D when it is determined by the second temporary stop determination means 42 that the temporary stop of the operation of the bed leaving determination means 10 is not instructed. In addition, it is determined whether or not at least one untarred processing load value is equal to or less than a predetermined fifth threshold value.

  The fifth abnormality alarm generation means 44 has a speaker, and issues an abnormality alarm when the seventh determination means 43 determines that at least one untarred processing load value is not more than the fifth threshold value. .

  The sixth abnormality alarm generation means 45 has a speaker, and is determined that the subject H on the bed 70 has left the bed by the bed-related determination means 10 (specifically, the bed determination means 12 of the bed-related determination means 10). If this is the case, an abnormal alarm is issued. This abnormal alarm notifies the subject H of getting out of bed, and is therefore also called a “getting out of bed alarm”.

<Configuration of bed leaving determination unit 10>
The configuration of the bed leaving relation determining unit 10 will be described in detail as follows.

  That is, the bed leaving determination unit 10 includes a bed leaving prediction determination unit 11, a bed leaving determination unit 12, and the like.

  The bed leaving prediction determining means 11 determines whether or not the bed leaving of the subject H on the bed 70 has been predicted based on the tare-treated load values (W1-A1, W2-A2, W3-A3, W4-A4). It is.

  The bed leaving determination unit 12 determines whether or not the subject H on the bed 70 has left the bed when it is determined by the bed leaving prediction determination unit 11 that the bed has been predicted.

<Configuration of temporary stop mode execution means 20>
The configuration of the temporary stop mode execution means 20 will be described in detail as follows.

  That is, the temporary stop mode executing means 20 automatically cancels the temporary stop when detecting that the bed 70 is re-installed in the first to fourth load detectors 1A to 1D during the execution of the temporary stop mode. A first determination means 21, a second determination means 22, a first abnormality alarm generation means 23, a third determination means 24, a temporary stop automatic release means 25, an elapsed time determination means 26, a third abnormality alarm generation means 27, An extension instruction determination unit 28, a weight memory determination unit 29, and the like are provided.

  The first determination means 21 determines whether or not at least one untarred processing load value among all the untarred processing load values W1 to W4 is greater than or equal to a predetermined first first threshold value.

  When it is determined by the first determination unit 21 that at least one untarred processing load value is equal to or greater than the first threshold value, the second determination unit 22 sets all the untarred processing load values W1 to W4 to a predetermined second threshold value. It is determined whether it is above.

  The first abnormality alarm generation means 23 has a speaker, and issues an abnormality alarm when the second determination means 22 determines that at least one untarred processing load value is not equal to or greater than the second threshold value. .

  The 3rd determination means 24 determines whether the variation | change_quantity within the predetermined time of all the untarred process load values W1-W4 is in the predetermined | prescribed 1st range.

  The temporary stop automatic canceling means 25 automatically cancels the temporary stop when the third determining means 24 determines that all the fluctuation amounts are within the first range.

  The elapsed time determination unit 26 determines whether or not the elapsed time from when the operation of the bed leaving determination unit 10 is temporarily stopped is within a predetermined stop time.

  The third abnormal alarm generation means 27 has a speaker, and issues an abnormal alarm when the elapsed time determination means 26 determines that the elapsed time is not within the stop time.

  The extension instruction determination unit 28 determines whether or not the extension of the stop time is instructed when the elapsed time determination unit 26 determines that the elapsed time is not within the stop time.

  The weight memory determination unit 29 determines whether or not the weight B of the subject H is stored in the weight storage unit 7.

<Configuration of Same Person Determination Unit 30>
The configuration of the same person determination means 30 will be described in detail as follows.

  That is, the same person determination unit 30 includes a subtraction unit 31, a subtraction value storage unit 32, a fourth determination unit 33, a fifth determination unit 34, a second abnormal alarm generation unit 35, a restart instruction determination unit 36, and the like.

  The subtracting means 31 is stored in the bed weight storage means 4 from the untarred processing total load value W obtained by adding up the four untarred processing load values W1 to W4 output from the first to fourth load detectors 1A to 1D. A subtraction value D (that is, D = W−A) obtained by subtracting the weight A of the bed 70 is calculated.

  The subtraction value storage unit 32 stores the subtraction value D calculated by the subtraction unit 31.

  The fourth determination means 33 determines whether or not the difference D−B between the subtraction value D and the weight B of the subject H stored in the weight storage means 7 is within a predetermined second range.

  The fifth determination unit 34 determines whether or not the subtraction value D is greater than or equal to a predetermined third threshold value.

  The second abnormal alarm generation means 35 has a speaker, and issues an abnormal alarm when it is determined that the subject H on the bed 70 is not the same person.

  When it is determined that the subject H on the bed 70 is not the same person, the restart instruction determination unit 36 determines whether or not the resumption of the operation of the bed leaving determination unit 10 has been instructed.

<Configuration of instruction operation means 50>
The instruction operation unit 50 is for a caregiver or the like to perform a predetermined instruction operation on the control unit 2, for example, a so-called remote controller that can remotely instruct the control unit 2 by wireless or wired communication. It is. In the present invention, anyone may perform the instruction operation to the control means 2 by the instruction operation means 50. However, in this specification, the instruction operation means 50 is described as being performed by a caregiver who performs care (help) for the subject H. Yes.

  This instruction operation means 50 is disposed in the vicinity of the bed 70 or is carried by a caregiver, and includes a pause instruction unit 51, a pause release instruction unit 52, a restart instruction unit 53, an extension instruction unit 54, and the like. have. Each of the instruction units 51 to 54 is, for example, a push button type.

  The temporary stop instruction unit 51 instructs the control means 2 (more specifically, the temporary stop determination means 8 of the control means 2) to temporarily stop the operation of the bed leaving determination means 10 by being pushed by a caregiver. is there. That is, when the caregiver presses the pause instruction unit 51, a pause command for the operation of the bed leaving determination unit 10 is transmitted from the instruction operation unit 50 to the control unit 2. Receiving this command, the suspension determination unit 8 of the control unit 2 recognizes that the suspension of the operation of the bed leaving determination unit 10 has been instructed.

  The temporary stop cancellation instructing unit 52 instructs the control means 2 to cancel the temporary stop when pressed by a caregiver.

  The resumption instruction unit 53 instructs the control means 2 (more specifically, the resumption instruction determination means 36 of the control means 2) to resume the operation of the bed leaving relation determination means 10 by being pushed by a caregiver. That is, when the caregiver presses the restart instruction unit 53, a restart instruction for the operation of the bed leaving determination unit 10 is transmitted from the instruction operation unit 50 to the control unit 2. The restart instruction determination unit 36 of the control unit 2 that has received this command recognizes that the operation of the leaving person related determination unit 10 is instructed to be restarted without operating the same person determination unit 30.

  The extension instructing unit 54 is instructed by the caregiver to extend the stop time to the control means 2 (more specifically, the extension instruction determining means 28 of the control means 2). That is, when the caregiver presses the extension instruction unit 54, a stop time extension command is transmitted from the instruction operation means 50 to the control means 2. Receiving this command, the extension instruction determination means 28 of the control means 2 recognizes that the stop time extension has been instructed.

  Next, operation | movement of the measuring device 80 of this embodiment is demonstrated below with the occupancy condition measuring method of the bed 70 using the said measuring device 80. FIG.

  First, the basic operation of the measuring device 80 will be described with reference to the main flowchart shown in FIG.

  As a pre-preparation step, the first to fourth load detectors 1A to 1D are arranged on the floor surface 75 of the bedroom so as to be spaced apart from each other corresponding to the spacing between the four leg portions 71A to 71D of the bed 70 (see FIG. 1). Next, corresponding leg portions (specifically, casters 72) of the bed 70 are installed (placed) on the load receiving portions 1a of the load detectors 1A to 1D. Thereby, installation to the load detectors 1A-1D of the bed 70 is completed. At this time, the subject H is not on the bed 70.

  In step S1a, when the subject H is not on the bed 70 by the bed weight measuring means 3, the untarred processing load values W1 to W4 output from the first to fourth load detectors 1A to 1D are respectively obtained. The untared processing total load value that is measured as the component values A1 to A4 of the weight A of the bed 70 and totals the four untarred processing load values W1 to W4 output from the first to fourth load detectors 1A to 1D. W is measured as the weight A of the bed 70. This process is referred to as “bed weight measurement process S1a”. Next, the measured weight A of the bed 70 and its component values A1 to A4 are stored in the bed weight storage means 4. This process is referred to as “bed weight storage process S1b”.

  In step S <b> 2, the measurement of the subject's H status on the bed 70 is started.

  In step S3, the tare processed load values (W1-A1, Tare processed by the tare processing means 5 with respect to the untarred processing load values W1 to W4 output from the first to fourth load detectors 1A to 1D). Based on W2-A2, W3-A3, W4-A4), the bed determining means 6 determines whether or not the subject H has bedbed on the bed 70. This process is referred to as “bed bed determination process S3”. Note that, in this bed determination step S3, as will be described later, when it is determined that the subject H has bedbed on the bed 70, the tare-treated total load value FW at that time is the weight B of the subject H and the weight storage means 7 Is remembered.

  In step S4, when it is determined that the subject H has bedbed on the bed 70 in the bed determining step S3, the temporary stop determining unit 8 determines whether or not the suspension of the bed leaving related determining step S7 to be described later is instructed. This process is referred to as “temporary stop determination process S4”. Note that the temporary stop of the bed leaving determination step S7 means a temporary stop of the transition from the bed determining step S3 to the bed leaving determination step S7.

  In step S5, when it is determined that the subject H is bedded on the bed 70 in the bed determination step S3, based on the tare-treated load values (W1-A1, W2-A2, W3-A3, W4-A4), As a determination regarding the getting-off of the subject H on the bed 70 (that is, the getting-off determination), the getting-off prediction determining means 11 determines whether or not the subject H has been predicted to leave. This process is referred to as a “bed leaving prediction determination process S5”. The judgment of getting out of bed is performed by a known method. For example, based on four tare-treated load values (W1-A1, W2-A2, W3-A3, W4-A4), the position of the center of gravity of the subject H on the bed 70 is calculated by a known method. When it exists in the center part area | region of the bed 70 as a bed area | region of the bed 70, it determines with the test subject H's getting out of bed not being predicted, On the other hand, this gravity center position is the center part area | region (namely, bed area | region) of the bed 70. It is determined that the subject H has predicted to get out of the bed when moving to the end region.

  In step S <b> 6, when it is determined in step S <b> 5 that the bed has been predicted, the bed determination unit 12 determines whether or not the subject H on the bed 70 has left the bed. This process is referred to as a “bed leaving determination process S6”. The determination of getting out of bed is performed by a known method. For example, when the decrease in the tare-treated total load value FW, which is the sum of four tare-treated load values (W1-A1, W2-A2, W3-A3, W4-A4) within a predetermined time, is small, the subject H leaves the bed. On the other hand, when the decrease amount of the tare-treated total load value FW within a predetermined time is very large and the tare-treated total load value FW becomes 0 kgf or a value close thereto, the subject H It is determined that the person has left the bed.

  In addition, the bed leaving prediction determining step S5 and the bed leaving determining step S6 are collectively referred to as a “bed leaving related determining step S7”.

  In step S8, when it is determined that the subject H on the bed 70 has left the bed in the bed leaving determination step S6 (bed-out related determination step S7), an abnormal alarm (bed bed alarm) that informs the subject H of getting out of bed by the sixth abnormality alarm generating means 45. ). This process is referred to as “sixth abnormal alarm generation process S8”. The caregiver who hears this abnormal alarm knows that the subject H has left the bed 70 and can go to the subject H for care (help) of the subject H who has left the bed. Next, the process returns to step S2.

  Next, details of the bed determining step S3 will be described below with reference to the flowchart shown in FIG. For convenience of explanation, it is assumed that the weight B of the subject H is 40 kgf or more in this embodiment. In addition, 1 kgf = 9.8 N.

  In step S20, the bed determining step S3 is started. In step 21, the second temporary stop determination means 42 determines whether or not the temporary stop of the bed leaving determination step S7 is instructed. This process is referred to as “second temporary stop determination process S21”. The temporary stop instruction in the bed leaving determination step S <b> 7 is performed when the caregiver presses the temporary stop instruction unit 51 of the instruction operation unit 50. If it is determined that a pause is not instructed (“NO”), the process proceeds to step S22. On the other hand, if it is determined that a pause is instructed (in the case of “YES”), the process proceeds to step S32, that is, the pause mode execution process (S32 to S39, S55 to S58) is started.

  In step S22, is at least one untarred processing load value among the untarred processing load values W1 to W4 output from the first to fourth load detectors 1A to 1D equal to, for example, 0 kgf or less as the predetermined fifth threshold value? The seventh determination means 43 determines whether or not. This step is referred to as “seventh determination step S22”. Here, since the untarred processing load values W1 to W4 are not theoretically less than 0 kgf, “0 kgf or less” is described as “0 kgf” in the following description and FIG. If it is determined that all the untarred processing load values W1 to W4 are not 0 kgf (the fifth threshold value or less) (in the case of “NO”), it is assumed that the bed 70 has not moved from the load detectors 1A to 1D. Proceed to step S25. On the other hand, if it is determined that at least one untarred processing load value is 0 kgf (fifth threshold value or less), it is determined that the bed 70 has been moved from the load detectors 1A to 1D, and the process proceeds to step S23, where the fifth abnormality is detected. The alarm generation means 44 issues an abnormal alarm. This step is referred to as “fifth abnormal alarm generation step S23”. Therefore, for example, the caregiver forgets to perform a temporary stop instruction operation and moves the bed 70 where the subject H is not present from the load detectors 1A to 1D, and as a result, at least one untarred processing load value. Can become 0 kgf (below the fifth threshold value), an abnormal alarm can be issued in the fifth abnormal alarm generation step S23. The caregiver who hears this abnormal alarm knows that he / she has forgotten to perform the pause instruction operation, and can take a predetermined measure such as performing the pause instruction operation. Next, the process proceeds to step S24.

  In step S24, it is determined by the second temporary stop determination means 42 whether or not the temporary stop of the bed leaving determination step S7 is instructed. The temporary stop instruction is performed when the caregiver presses the temporary stop instruction unit 51 of the instruction operation unit 50. If it is determined that the temporary stop is instructed (in the case of “YES”), the generation of the abnormal alarm by the fifth abnormal alarm generating means 44 is canceled (stopped) and the process proceeds to step S32, that is, the temporary stop mode execution step ( S32 to S39, S55 to S58) are started. On the other hand, if it is determined that the pause is not instructed (in the case of “NO”), it is determined that the caregiver does not intend to move to the bed leaving determination process S7, and the process proceeds to step S1a (that is, the bed weight measurement process). Returning, the weight A of the bed 70 is measured again by operating the bed weight measuring means 3 again in the step S1a. Therefore, even if the caregiver forgets to perform the pause instruction operation and the subject 70 moves the bed 70 where the subject H is not present from the load detectors 1A to 1D, the caregiver gives the pause instruction. By performing the operation, the temporary stop mode execution process (S32 to S39, S55 to S58) can be performed, and by not performing the temporary stop instruction operation, it is possible to return to the bed weight measurement process S1a.

  In step S25, it is determined whether the tare-treated total load value FW is, for example, 20 kgf or more as a predetermined threshold value. If it is determined that the tare-treated total load value FW is 20 kgf or more (in the case of “YES”), the subject H is assumed to be on the bed 70 and the process proceeds to step S26. On the other hand, if it is determined that the tare-treated total load value FW is not 20 kgf or more (that is, less than 20 kgf) (in the case of “NO”), it is assumed that the subject H is not present on the bed 70. Return to S21.

  In step S26, it is determined whether other bed conditions are satisfied. The other bed conditions are the time during which the center of gravity of the subject H exists in the central area (bed area) of the bed 70 or the center of gravity of the subject H exists in the central area of the bed 70. Is longer than a predetermined time, or each tare-treated load value (W1-A1, W2-A2, W3-A3, W4-A4) is substantially constant within a predetermined time. If it is determined that the other bed conditions are satisfied (in the case of “YES”), the process proceeds to step S27, and the subject H is on the bed 70 for sleeping, that is, the subject H is on the bed 70. Is determined to be bedridden. Then, the process proceeds to step S28. On the other hand, if it is determined that the other bed conditions are not satisfied (in the case of “NO”), the subject H is not bedded on the bed 70 and the process returns to step S21.

  Note that the determination in steps S25 and S26 is performed by the bed determining means 6.

  In step S <b> 28, the tare-processed total load value FW when it is determined that the subject H has bedbed on the bed 70 is stored in the weight storage means 7 as the weight B of the subject H. This process is referred to as “weight storage process S28”. And it progresses to step S29, ie, transfers to temporary stop determination process S4.

  Next, details of the pause determination step S4 and the pause mode execution step (S32 to S39, S55 to S58) will be described below with reference to the flowchart shown in FIG.

  In step S30, a temporary stop determination step S4 is started. In step S31, the temporary stop determination means 8 determines whether or not the temporary stop of the bed leaving determination step S7 has been instructed. The temporary stop instruction is performed when the caregiver presses the temporary stop instruction unit 51 of the instruction operation unit 50. When the caregiver tries to move the bed 70 in which the subject H is present from the load detectors 1A to 1D in order to transport the subject H to an event room such as a rehabilitation room, the caregiver instructs Perform the operation. If it is determined that the temporary stop is instructed (“YES”), the process proceeds to step S32. On the other hand, if it is determined that the pause is not instructed (in the case of “NO”), the process proceeds to step S50.

  In step S32, the temporary stop mode in which the bed leaving determination step S7 is temporarily stopped is started (executed), that is, the temporary stop mode execution step (S32 to S39, S55 to S58) is started (operation of the temporary stop mode executing means 20). To start). Then, the process proceeds to step S33.

  In step S33, measurement of elapsed time from the time when the temporary stop mode execution process (S32 to S39, S55 to S58) is started (that is, when the bed leaving determination process S7 is temporarily stopped) is started. The elapsed time is measured by the elapsed time determination means 26. Normally, after this step S33 or S32, the caregiver moves the bed 70 where the subject H is present from the load detectors 1A to 1D in order to transport the subject H to the rehabilitation room or the like. At this time, since the bed leaving determination step S7 is temporarily stopped, even if the bed 70 is moved from the load detectors 1A to 1D in this way, an abnormal alarm (notifying the subject H of getting out of bed by the sixth abnormality alarm generating means 45) “Leave bed alarm”) will not be issued. Next, the process proceeds to step S34.

  In step S34, the elapsed time determination means 26 determines whether or not the elapsed time is within a predetermined stop time. This process is referred to as “elapsed time determination process S34”. Usually, within this stop time, the bed 70 in which the subject H who has completed rehabilitation or the like is present is re-installed in the load detectors 1A to 1D. The predetermined stop time is set according to an event such as rehabilitation, medical examination, and examination performed on the subject H, and is not uniquely determined. For example, when the event is rehabilitation The stop time is selected and set within the range of 1 to 1000 min. If it is determined that the elapsed time is within the stop time (in the case of “YES”), the process proceeds to step S35. On the other hand, if it is determined that the elapsed time is not within the stop time (i.e., exceeds the stop time) (in the case of "NO"), the process proceeds to step S55, and an abnormal alarm is issued by the third abnormal alarm generating means 27. . This process is referred to as “third abnormality alarm generation process S55”. Other caregivers who heard this abnormal alarm can know that the bed 70 in which the subject H is present has moved to the rehabilitation room etc. over a long period of time exceeding a predetermined stop time, Thereby, the said other caregiver can guess that the abnormal condition etc. have arisen with respect to the test subject H or a caregiver, and can go to the test subject H for the solution and assistance. Next, the process proceeds to step S56.

  In step S56, the extension instruction determination unit 28 determines whether or not an instruction to extend the stop time has been issued. This process is referred to as “extension instruction determination process S56”. The instruction to extend the stop time is made when the caregiver pushes the extension instruction section 54 of the instruction operation means 50. If it is determined that the extension of the stop time has been instructed (in the case of “YES”), the process proceeds to step S57, and the generation of the abnormal alarm by the third abnormal alarm generating means 27 is canceled (stopped). Then, the process proceeds to step S58 to extend the stop time. Then, the process returns to step S34. Therefore, when the caregiver wishes to extend the stop time, the caregiver can release the abnormal alarm and can extend the stop time by pressing the extension instruction portion 54 of the instruction operation means 50. On the other hand, if it is determined that the extension of the stop time is not instructed (in the case of “NO”), it is assumed that the caregiver does not intend to move to the bed leaving determination step S7, and step S1a (that is, the bed weight measurement step). ), The weight A of the bed 70 is remeasured by operating the bed weight measuring means 3 again in step S1a.

  In step S35, the first determination means 21 determines whether at least one untarred processing load value among the four untarred processing load values W1 to W4 is, for example, 10 kgf or more as a predetermined first threshold value. This step is referred to as “first determination step S35”. If it is determined that all untarred processing load values W1 to W4 are not equal to or greater than 10 kgf (first threshold) (ie, less than 10 kgf) (in the case of “NO”), the bed in which subject H is present Assuming that the re-installation work on the load detectors 1A to 1D of 70 has not been started, the process returns to step S34. On the other hand, if it is determined that at least one untarred processing load value is 10 kgf (first threshold value) or more, re-installation work to the load detectors 1A to 1D of the bed 70 where the subject H is present is performed. Assuming that it has started, the process proceeds to step S36.

  In step S <b> 36, the second determination unit 22 determines whether all the untarred processing load values W <b> 1 to W <b> 4 are, for example, 10 kgf or more as the predetermined second threshold value. This step is referred to as “second determination step S36”. If it is determined that at least one untarred processing load value is not equal to or greater than 10 kgf (second threshold value) (in the case of “NO”), the process proceeds to step S37, where the leg portions 71A to 71D of the bed 70 are first to first. An abnormality alarm is issued by the first abnormality alarm generating means 23 on the assumption that the four load detectors 1A to 1D are not properly installed on the load receiving portion 1a of at least one of the load detectors. This process is referred to as “first abnormality alarm generation process S37”. The caregiver who heard this abnormal alarm knows that the leg portions 71A to 71D of the bed 70 are not properly installed on the load receiving portion 1a of the at least one load detector 1A to 1D, and the installation position of the bed 70 is known. Can be corrected. Thereby, the measurement of the subject's H-bed condition can be performed correctly. Then, the generation of the abnormal alarm by the first abnormal alarm generating means 23 is canceled (stopped) within a predetermined time (for example, 10 min) from the time when the abnormal alarm is issued in step S37, and the process returns to step S34. On the other hand, if it is determined that all the untarred processing load values W1 to W4 are 10 kgf (second threshold) or more (in the case of “YES”), the leg portions 71A to 71D of the bed 70 are all the load detectors. Proceeding to step S38, assuming that it is properly installed on the load receiving portions 1a of 1A to 1D.

  In step S38, the third determination means 24 determines whether the fluctuation amount for 5 seconds, for example, is within a predetermined first range, for example, within ± 3 kgf as the predetermined time for all the untarred processing load values W1 to W4. . This step is referred to as “third determination step S38”. If it is determined that the fluctuation amount of all the untarred processing load values W1 to W4 for 5 seconds (predetermined time) is within ± 3 kgf (within the first range) (in the case of “YES”), it is on the bed 70 Assuming that the subject H is resting calmly, the process proceeds to step S39, where the temporary stop is automatically canceled by the automatic stop canceling means 25. This process is referred to as “pause automatic cancellation process S39”. Therefore, when the subject H rests on the bed 70, the caregiver does not have to perform the temporary stop release operation. Therefore, a caregiver's burden can be reduced. Next, the process proceeds to step S61. On the other hand, if it is determined that the fluctuation amount of all the untarred processing load values W1 to W4 for 5 seconds (predetermined time) is not within ± 3 kgf (in the first range) (in the case of “NO”), the bed 70 Assuming that the subject H is not resting on the top, the process returns to step S38.

  Here, in the present embodiment, the suspension is automatically canceled by the suspension automatic cancellation means 25. However, in the present invention, when the re-installation work on the load detectors 1 </ b> A to 1 </ b> D of the bed 70 is finished, the caregiver cancels the temporary stop by pressing the temporary stop cancellation instructing section 52 of the instruction operation means 50. You may do it. In this case, the temporary stop is manually canceled, and then the process proceeds to step S61.

  In step S50, the sixth determination unit 40 determines whether at least one untarred processing load value among the four untarred processing load values W1 to W4 is, for example, 0 kgf or less as a predetermined fourth threshold value. This step is referred to as “sixth determination step S50”. Here, since the untarred processing load values W1 to W4 are not theoretically less than 0 kgf, “0 kgf or less” is described as “0 kgf” in the following description and FIG. If it is determined that all the untarred processing load values W1 to W4 are not 0 kgf (fourth threshold value or less) (in the case of “NO”), the bed 70 is not moved from the load detectors 1A to 1D. It progresses to step S51, ie, moves to the bed leaving prediction determination process S5 of the bed removal related determination process S7. On the other hand, if it is determined that at least one untarred processing load value is 0 kgf (fourth threshold or less), the process proceeds to step S52, and the bed 70 is moved from the load detectors 1A to 1D. The alarm generation means 41 issues an abnormal alarm. This process is referred to as “fourth abnormal alarm generation process S52”. Therefore, for example, the caregiver forgets to perform a temporary stop instruction operation and moves the bed 70 where the subject H is present from the load detectors 1A to 1D, and as a result, at least one untarred processing load value. Can become 0 kgf (fourth threshold or less), an abnormal alarm can be issued in the fourth abnormal alarm generation step S52. The caregiver who hears this abnormal alarm knows that he / she has forgotten to perform the pause instruction operation, and can take a predetermined measure such as performing the pause instruction operation. Next, the process proceeds to step S53.

  In step S53, it is determined by the temporary stop determination means 8 whether or not the temporary stop in the bed leaving determination step S7 is instructed. The temporary stop instruction is performed when the caregiver presses the temporary stop instruction unit 51 of the instruction operation unit 50. If it is determined that the temporary stop is instructed (in the case of “YES”), the generation of the abnormal alarm by the fourth abnormal alarm generating means 41 is canceled (stopped) and the process proceeds to step S32, that is, the temporary stop mode execution step ( S32 to S39, S55 to S58) are started. On the other hand, if it is determined that the pause is not instructed (in the case of “NO”), the caregiver returns to step S1a (that is, the bed weight measurement process) assuming that there is no intention to shift to the bed leaving determination process S7. In step S1a, the weight A of the bed 70 is measured again by operating the bed weight measuring means 3 again. Therefore, even when the caregiver forgets to perform the pause instruction operation and the bed 70 where the subject H is present is moved from the load receiving portion 1a of the load detectors 1A to 1D, the caregiver is moved. Can perform the pause mode execution process (S32 to S39, S55 to S58) by performing a pause instruction operation, and can return to the bed weight measurement process S1a by not performing a pause instruction operation. it can.

  In FIG. 6, steps S61 to S71 show the determination procedure of the same person determination step. In the same person determination steps S61 to S71, a subtraction value D obtained by subtracting the weight A of the bed 70 stored in the bed weight storage unit 4 in the bed weight storage step S1b from the untarred processing total load value W, and a weight storage step S28. Based on the weight B of the subject H stored in the weight storage means 7, the subject H on the current bed 70 is the same person as the subject H before being instructed to pause the bed leaving determination step S7. Is determined by the same person determination means 30. These steps S61 to S71 will be described in detail below.

  In step S61, the subtraction means 31 is obtained by subtracting the subtraction value D (ie, D = W−A) obtained by subtracting the weight A of the bed 70 stored in the bed weight storage means 4 in the bed weight storage step S1b from the untarred processing total load value W. Calculated by This process is referred to as “subtraction value calculation process S61”. Then, the process proceeds to step S62.

  In step S 62, the subtraction value D calculated by the subtraction means 31 is stored in the subtraction value storage means 32. This process is referred to as “subtraction value storage process S62”. Then, the process proceeds to step S63.

  In step S63, the fifth determination unit 34 determines whether or not the subtraction value D stored in the subtraction value storage unit 32 is, for example, 5 kgf or more as a predetermined third threshold value. This step is referred to as “fifth determination step S63”. If it is determined that the subtraction value D is equal to or greater than 5 kgf (third threshold value) (in the case of “YES”), it is determined that the subject H is currently on the bed 70 and the process proceeds to step S64. On the other hand, if it is determined that the subtraction value D is not greater than or equal to 5 kgf (third threshold) (ie, less than 5 kgf) (in the case of “NO”), the subject H is not present on the bed 70 at the present time. As shown in FIG. Therefore, in the fifth determination step S63, it can be determined whether or not the subject H is on the bed 70.

  In step S <b> 64, the weight storage determination unit 29 determines whether or not the weight B of the subject H is stored in the weight storage unit 7. This step is referred to as “weight memory determination step S64”. If it is determined that the weight B of the subject H is stored in the weight storage means 7 (in the case of “YES”), the process proceeds to step S66. On the other hand, if it is determined that the weight B of the subject H is not stored in the weight storage means 7 (in the case of “NO”), the process proceeds to step S65, and an abnormal alarm is generated by a predetermined abnormality alarm generation means (not shown). Is issued for a predetermined time. Then, returning to step S1a (that is, the bed weight measuring step), the weight A of the bed 70 is measured again by operating the bed weight measuring means 3 again in the step S1a. Accordingly, the weight B of the subject H has not been stored in the weight storage means 7 even after the measurement has been started, that is, it has not been determined that the subject H has been bedridden on the bed 70 since the measurement was started. When it is determined in the second temporary stop determination step S21 that the temporary stop is instructed, the weight memory determination step S64 can return to the bed weight measurement step S1a. As a result, even if the subject 70 is not lying on the bed 70, even if the bed 70 is moved from the load detectors 1A to 1D, the abnormal alarm (“getting out of bed” is notified by the sixth abnormal alarm generating means 45. Alarm ") will no longer be issued. On the other hand, it is determined that the weight B of the subject H is stored in the weight storage means 7 at least once after the measurement is started, that is, the subject H is bedridden on the bed 70 at least once after the measurement is started. If it is determined in the second temporary stop determination step S21 that the temporary stop is instructed, the temporary stop mode execution step (S32 to S39) is performed regardless of whether or not the subject H is lying on the bed 70. , S55 to S58) and the same person determination steps S61 to S71.

  In step S66, whether or not the difference D−B between the subtraction value D and the weight B of the subject H stored in the weight storage means 7 in the weight storage step S28 is within ± 5 kgf as the predetermined second range is determined. 4 is determined by the determination unit 33. This step is referred to as “fourth determination step S66”. If it is determined that the difference D−B is within ± 5 kgf (within the second range) (in the case of “YES”), the process proceeds to step S67, and the subject H on the current bed 70 is determined to be out of bed. It is determined that the subject is the same person as the subject H before the temporary stop is instructed. Then, the process proceeds to step S75, that is, the process proceeds to the bed prediction determination process S5 in the bed removal determination process S7. Therefore, when resuming the bed leaving determination step S7, it is not necessary to measure the weight A of the bed 70 as a tare value necessary for the tare processing (that is, the bed weight measurement step S1a). Therefore, the caregiver does not need to bother the subject H from the bed 70 when the bed leaving determination step S7 is restarted, and thus the burden on the caregiver can be reduced. On the other hand, if it is determined that the difference D−B is not within ± 5 kgf (within the second range) (in the case of “NO”), the subject H on the current bed 70 pauses the bed leaving determination step S7. Is determined not to be the same person as the subject H before the instruction is made, the process proceeds to step S68, and an abnormal alarm is issued by the second abnormal alarm generating means 35. This process is referred to as “second abnormal alarm generation process S68”. Therefore, the caregiver who hears this abnormal alarm indicates that the subject H on the bed 70 is not the same person, or the subject H on the bed 70 is the same person but the fall prevention fence 73 is newly attached to the bed 70. It is possible to know that the weight A of the bed 70 as the tare value has changed due to being placed on the bed 70 or a new object (eg, luggage, inspection instrument, futon) on the bed 70. Next, the process proceeds to step S69.

  In step S69, when it is determined in the fourth determination step S66 that the subject H on the current bed 70 is not the same person, the restart instruction determination unit 36 determines whether or not the resumption of the bed leaving determination step S7 is instructed. To do. This process is referred to as “resumption instruction determination process S69”. The resumption instruction in the bed leaving determination step S <b> 7 is performed when the caregiver pushes the resumption instruction unit 53 of the instruction operation unit 50. If it is determined that the resumption is not instructed (in the case of “NO”), the caregiver returns to step S1a (that is, the bed weight measurement step) assuming that there is no intention to resume the bed leaving determination step S7. On the other hand, if it is determined that the resumption is instructed (in the case of “YES”), the process proceeds to step S70, and the occurrence of the abnormal alarm by the second abnormal alarm generating means 35 is canceled (stopped). Then, the process proceeds to step S71.

  In step S71, the subtraction value D is re-stored in the weight storage means 7 as the weight B of the subject H. Then, the process proceeds to step S75, that is, the process proceeds to the bed prediction determination process S5 in the bed removal determination process S7. Therefore, even if the subject H on the bed 70 is not the same person or the weight A of the bed 70 as the tare value has changed, the process can proceed to the bed leaving prediction determination step S5 in the bed leaving determination step S7. it can. However, in this case, there is a risk that the accuracy of the measurement of the occupancy state such as the bed leaving determination is decreased with the change in the weight A of the bed 70.

  Thus, when the process proceeds from step S67 or S71 to step S75 (that is, the bed leaving prediction determination step S5 in the bed leaving determination step S7), the subject H on the bed 70 moves in the bed leaving determination step S6 in the bed leaving related determination step S7. When it is first determined that the person has left the floor (step S76), the process returns to step S1a (that is, the bed weight measuring step), and the bed weight measuring means 3 is re-operated in step S1a to remeasure the weight A of the bed 70. . Therefore, although the weight A of the bed 70 has actually changed during the temporary stop mode execution process (S32 to S39, S55 to S58), since the amount of change is small, the same person determination process S61 to S71 is the same person. Even if it is determined, the bed weight A can be measured in the returned bed weight measurement step S1a. Therefore, accurate tare processing can be performed using the changed weight A of the bed as a tare value, and thereby the accuracy of the measurement of the occupancy status such as the bed leaving determination can be increased. Furthermore, since it is determined that the subject H on the bed 70 has left before the bed weight measuring step S1a, the subject H has already left the bed 70 during the bed weight measuring step S1a. Therefore, the caregiver does not need to lower the subject H from the bed 70. Therefore, no burden is placed on the caregiver.

  Although one embodiment of the present invention has been described above, it is needless to say that the present invention is not limited to the above embodiment and can be variously modified.

  Moreover, in the said embodiment, the number of the load detection means 1 is four. Thus, when there are a plurality of load detection means 1, it is possible to measure in detail the presence status of the subject H. However, in the present invention, the number of the load detecting means 1 is not limited to a plurality, and may be one, for example. In this case, in the same person determination step, as a matter of course, the untarred processing load value output from one load detecting means is used as the untarred processing total load value W.

  INDUSTRIAL APPLICABILITY The present invention can be used for a bed occupancy measurement method, a bed occupancy measurement device, and a bed occupancy measurement system that measure the occupancy of a subject such as getting out of bed.

1: Load detecting means 1A to 1D: Load detector 1a: Load receiving portion 2: Control means 3: Bed weight measuring means 4: Bed weight storing means 5: Tare processing means 6: Bed determining means 7: Weight storing means 8: Temporary stop determining means 10: Bed leaving relation determining means 11: Bed leaving prediction determining means 12: Bed leaving determination means 20: Temporary stop mode executing means 30: Same person determining means 50: Instruction operation means

Claims (23)

A load detection step of detecting a load applied to the bed by a load detection means arranged on the lower side of the bed;
A bed weight measuring step of measuring the untarred processing load value output from the load detecting means when the subject is not on the bed as the weight of the bed;
A bed weight storage step of storing the bed weight measured in the bed weight measurement step in a bed weight storage means;
After the bed weight is stored in the bed weight storage means, the bed weight stored in the bed weight storage means is set as the tare value with respect to the untarred processing load value output from the load detection means. A taring process for processing;
A bed determination step for determining whether or not the subject has bedbed on the bed based on the tare-treated load value that has been tared in the tare treatment step;
When it is determined that the subject has bedbed on the bed in the bedside determination step, the weight storage step of storing the tare-treated load value at that time in the weight storage means as the weight of the subject;
When it is determined that the subject has bedbed on the bed in the bedside determination step, a bed-related determination step of performing a determination regarding the bed leaving of the subject on the bed based on the tared load value,
A pause determination step of determining whether or not a pause of the bed leaving determination step is instructed;
When it is determined in the temporary stop determination step that the temporary stop of the leaving bed related determination step is instructed, a temporary stop mode execution step of temporarily stopping the leaving bed related determination step;
When the temporary stop is released, a subtracted value obtained by subtracting the weight of the bed stored in the bed weight storage unit from the untarred processing load value output from the load detection unit and the subject stored in the weight storage unit And the same person determination step of determining whether or not the subject on the bed is the same person as the subject before being instructed to temporarily stop the bed leaving determination step, based on the weight of
The bed occupancy status measuring method, wherein when the subject on the bed is determined to be the same person in the same person determination step, the bed leaving determination step is resumed. The number of the load detection means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
The temporary stop mode execution step includes
A first determination step of determining whether at least one untarred processing load value of all the untarred processing load values is equal to or greater than a predetermined first threshold;
When it is determined in the first determination step that at least one untarred processing load value is equal to or greater than the first threshold value, it is determined whether all the untarred processing load values are equal to or greater than a predetermined second threshold value. A second determination step;
2. The bed according to claim 1, further comprising: a first abnormality alarm generation step that issues an abnormality alarm when it is determined in the second determination step that at least one untarred processing load value is not equal to or greater than the second threshold value. How to measure the presence of a child. The temporary stop mode execution step includes
A third determination step of determining whether or not a variation amount of all untarred processing load values within a predetermined time is within a predetermined first range;
The bed according to claim 2, further comprising: a temporary stop automatic release step of automatically releasing the temporary stop when it is determined in the third determination step that all the fluctuation amounts are within the first range. Method of measuring the presence of the floor. The same person determination step includes
A fourth determination step of determining whether or not a difference between the subtracted value and the weight of the subject stored in the weight storage means is within a predetermined second range, and the difference is determined in the fourth determination step; The method for measuring bed occupancy status according to any one of claims 1 to 3, wherein, when determined to be within the second range, the subject on the bed is determined to be the same person. The same person determination step includes
A bed having a fifth determination step for determining whether or not the subtraction value is equal to or greater than a predetermined third threshold, and when the subtraction value is determined to be equal to or greater than the third threshold in the fifth determination step; To determine whether the subject above is the same person,
Furthermore, the same person determination step includes
A second abnormal alarm generation step for generating an abnormal alarm when it is determined that the subject on the bed is not the same person;
When it is determined that the subject on the bed is not the same person, a restart instruction determination step for determining whether or not the restart of the bed related determination step is instructed,
When it is determined in the restart instruction determination step that the resumption of the bed leaving determination step is instructed, the subtraction value is re-stored in the body weight storage means as the weight of the subject, and then the bed removal related determination step is restarted. Item 5. The bed occupancy state measuring method according to any one of Items 1 to 4.   When the subtraction value is re-stored in the body weight storage means as the body weight of the subject and then the bed leaving determination process is restarted, the bed weight measurement process is performed when it is first determined that the subject on the bed has left the bed. 6. The bed occupancy state measuring method according to claim 5, wherein The temporary stop mode execution step includes
An elapsed time determining step for determining whether or not an elapsed time from when the bed leaving related determining step is temporarily stopped is within a predetermined stop time; and
A third abnormal alarm generation step for generating an abnormal alarm when it is determined in the elapsed time determination step that the elapsed time is not within the stop time;
An extension instruction determination step for determining whether or not an extension of the stop time has been instructed when the elapsed time is determined not to be within the stop time in the elapsed time determination step,
The bed occupancy state measuring method according to any one of claims 1 to 6, wherein when the extension is determined to be instructed in the extension instruction determining step, the stop time is extended. The number of the load detection means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
If it is determined in the temporary stop determination step that the temporary stop of the bed leaving determination step is not instructed, at least one untarred processing load value output from the plurality of load detection means is equal to or less than a predetermined fourth threshold value. A sixth determination step for determining whether or not
A fourth abnormality alarm generation step for generating an abnormality alarm when it is determined in the sixth determination step that at least one untare processing load value is equal to or less than the fourth threshold;
When it is determined in the sixth determination step that at least one untare processing load value is equal to or less than the fourth threshold value, when the suspension of the bed leaving determination step is instructed, the process proceeds to the temporary stop mode execution step. On the other hand, the bed occupancy state measuring method according to any one of claims 1 to 7, wherein the bed weight measurement step is returned to when the temporary stop of the bed leaving determination step is not instructed.   After the subject on the bed is determined to be the same person in the same person determination step, the bed weight measurement step is performed when it is first determined that the subject on the bed has left the bed when restarting the determination process related to getting out of bed. 9. The bed occupancy state measuring method according to any one of claims 1 to 8. When it is determined that the subject does not bed on the bed in the bed determination step, the bed determination step includes a second pause determination step for determining whether or not a pause of the bed leaving determination step is instructed,
When it is determined in the second temporary stop determination step that the temporary stop of the bed leaving related determination step is instructed, the process proceeds to the temporary stop mode execution step,
The pause mode execution step includes a weight memory determination step for determining whether the weight of the subject is stored in the weight storage means,
The bed occupancy state measuring method according to any one of claims 1 to 9, wherein if the weight of the subject is determined not to be stored in the weight storage means in the weight memory determination step, the process returns to the bed weight measurement step. . The number of the load detection means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
When it is determined in the second temporary stop determination step that the temporary stop of the bed leaving determination step is not instructed, at least one untarred processing load value output from the plurality of load detection means is a predetermined fifth value. A seventh determination step of determining whether or not the threshold is equal to or less than a threshold;
A fifth abnormality alarm generation step for generating an abnormality alarm when it is determined in the seventh determination step that at least one untarred processing load value is equal to or less than the fifth threshold;
When it is determined in the seventh determination step that at least one untare processing load value is equal to or less than the fifth threshold value, when the suspension of the bed leaving determination step is instructed, the process proceeds to the temporary stop mode execution step. On the other hand, the bed occupancy state measuring method according to claim 10, wherein the bed weight measuring step returns to the bed weight measuring step if no instruction is given to pause the bed leaving related determining step. A load detecting means which is disposed under the bed and detects a load applied to the bed;
Bed weight measuring means for measuring the untarred processing load value output from the load detecting means when the subject is not on the bed as the weight of the bed;
Bed weight storage means for storing the weight of the bed measured by the bed weight measurement means;
After the bed weight is stored in the bed weight storage means, the bed weight stored in the bed weight storage means is set as the tare value with respect to the untarred processing load value output from the load detection means. A tare processing means for processing;
A bed determining means for determining whether or not the subject has bedbed on the bed based on the tared load value that has been tared by the tare processing means;
When it is determined that the subject has bedbed on the bed by the bedside determining means, the weight storage means for storing the tare-treated load value at that time as the weight of the subject,
When it is determined that the subject has bedbed on the bed by the bed-determining unit, the bed-related determining unit that makes a determination on the bed of the subject on the bed based on the tared load value;
A pause determination unit that determines whether or not an instruction to pause the operation of the bed leaving determination unit is given;
A pause mode execution means for temporarily stopping the operation of the bed leaving determination means when it is determined by the pause determination means that a pause of the operation of the bed leaving determination means has been instructed;
When the temporary stop is released, a subtracted value obtained by subtracting the weight of the bed stored in the bed weight storage unit from the untarred processing load value output from the load detection unit and the subject stored in the weight storage unit And a same person determining means for determining whether or not the subject on the bed is the same person as the subject before being instructed to temporarily stop the operation of the bed leaving determination means based on the weight of the person ,
When the same person determining means determines that the subject on the bed is the same person, the operation of the bed leaving relation determining means is resumed. The number of the load detection means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
The temporary stop mode execution means includes
First determination means for determining whether or not at least one untarred processing load value among all the untarred processing load values is equal to or greater than a predetermined first threshold;
When it is determined by the first determination means that at least one untarred processing load value is equal to or greater than the first threshold value, it is determined whether all the untarred processing load values are equal to or greater than a predetermined second threshold value. A second determination means;
13. The bed according to claim 12, further comprising: a first abnormality alarm generation unit that issues an abnormality alarm when the second determination unit determines that at least one untare processing load value is not equal to or greater than the second threshold value. In-situ measurement device. The temporary stop mode execution means includes
Third determination means for determining whether or not the variation amount of all untarred processing load values within a predetermined time is within a predetermined first range;
The bed according to claim 13, further comprising: a temporary stop automatic canceling unit that automatically cancels the temporary stop when the third determination unit determines that all the fluctuation amounts are within the first range. In-bed situation measuring device. The same person determination means includes
The apparatus further comprises fourth determination means for determining whether or not the difference between the subtracted value and the weight of the subject stored in the weight storage means is within a predetermined second range, and the difference is determined by the fourth determination means. 15. The bed occupancy state measuring apparatus according to claim 12, wherein when it is determined to be within the second range, the subject on the bed is determined to be the same person. The same person determination means includes
When the fifth determination unit determines whether the subtraction value is equal to or greater than a predetermined third threshold and the fifth determination unit determines that the subtraction value is equal to or greater than the third threshold, To determine whether the subject above is the same person,
Furthermore, the same person determination means includes
A second abnormal alarm generating means for generating an abnormal alarm when it is determined that the subject on the bed is not the same person;
When it is determined that the subject on the bed is not the same person, a restart instruction determination unit that determines whether or not the restart of the operation of the bed leaving determination unit is instructed,
When it is determined by the restart instruction determination means that the resumption of the operation of the bed leaving relation determining means is instructed, the subtraction value is re-stored in the weight storage means as the weight of the subject, and then the operation of the bed leaving related determination means The bed occupancy state measuring apparatus according to any one of claims 12 to 15, wherein the bed is resumed.   When the subtraction value is re-stored in the body weight storage means as the body weight of the subject and then the operation of the bed leaving determination means is restarted, when the subject on the bed is first determined to have left the bed weight The bed occupancy state measuring apparatus according to claim 16, wherein the measuring means is re-operated. The temporary stop mode execution means includes
Elapsed time determination means for determining whether or not an elapsed time from when the operation of the bed leaving determination means is temporarily stopped is within a predetermined stop time;
A third abnormal alarm generating means for generating an abnormal alarm when the elapsed time determining means determines that the elapsed time is not within the stop time;
When the elapsed time determining means determines that the elapsed time is not within the stop time, it comprises an extension instruction determining means for determining whether or not an extension of the stop time has been instructed.
The bed occupancy state measuring apparatus according to any one of claims 12 to 17, wherein the stop time is extended when it is determined that extension is instructed by the extension instruction determining means. The number of the load detection means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
If it is determined by the temporary stop determination means that the temporary stop of the operation of the bed leaving determination means is not instructed, at least one untarred processing load value output from the plurality of load detection means is a predetermined fourth value. Sixth determination means for determining whether or not the value is equal to or less than a threshold;
A fourth abnormality alarm generating means for issuing an abnormality alarm when the sixth determination means determines that at least one untare processing load value is equal to or less than the fourth threshold;
When it is determined by the sixth determination means that at least one untarred processing load value is equal to or less than the fourth threshold value, the temporary stop mode execution means is instructed to pause the operation of the bed leaving determination means. 19. On the other hand, if the temporary stop of the operation of the bed related determination unit is not instructed, the bed weight measuring unit is operated again. Measuring device.   After the subject on the bed is determined to be the same person by the same person determination means, the bed weight is determined when it is first determined that the subject on the bed has left the bed when the operation of the bed related determination means is resumed. 20. The bed occupancy status measuring device according to any one of claims 12 to 19, wherein the measuring means is operated again. When the bed determining means determines that the subject is not bedded on the bed, the bed determining means includes second pause determining means for determining whether or not a pause of the operation of the bed leaving related determining means has been instructed,
When it is determined by the second temporary stop determination means that the temporary stop of the operation of the bed leaving determination means is instructed, the temporary stop mode execution means is operated,
The pause mode execution means includes weight memory determination means for determining whether or not the weight of the subject is stored in the weight storage means,
21. The bed weight measuring unit according to any one of claims 12 to 20, wherein when the weight memory determining unit determines that the weight of the subject is not stored in the weight storing unit, the bed weight measuring unit is re-operated. Bed occupancy status measurement device. The number of the load detection means is plural,
The plurality of load detection means detect loads applied to a plurality of parts separated from each other in the bed,
When it is determined by the second temporary stop determination means that the temporary stop of the operation of the bed leaving determination means is not instructed, at least one untare processing load value output from the plurality of load detection means is a predetermined value. Seventh determination means for determining whether or not the fifth threshold value or less;
A fifth abnormality alarm generation means for issuing an abnormality alarm when the seventh determination means determines that at least one untare processing load value is equal to or less than the fifth threshold;
When it is determined by the seventh determination means that at least one untare processing load value is equal to or less than the fifth threshold value, the temporary stop mode execution means is instructed to pause the operation of the bed leaving determination means 23. The bed occupancy state measuring device according to claim 21, wherein the bed weight measuring unit is re-operated when a temporary stop of the operation of the bed leaving determination unit is not instructed. A load detecting means which is disposed under the bed and detects a load applied to the bed;
Bed weight measuring means for measuring the untarred processing load value output from the load detecting means when the subject is not on the bed as the weight of the bed;
Bed weight storage means for storing the weight of the bed measured by the bed weight measurement means;
After the bed weight is stored in the bed weight storage means, the bed weight stored in the bed weight storage means is set as the tare value with respect to the untarred processing load value output from the load detection means. A tare processing means for processing;
A bed determining means for determining whether or not the subject has bedbed on the bed based on the tared load value that has been tared by the tare processing means;
When it is determined that the subject has bedbed on the bed by the bedside determining means, the weight storage means for storing the tare-treated load value at that time as the weight of the subject,
When it is determined that the subject has bedbed on the bed by the bed-determining unit, the bed-related determining unit that makes a determination on the bed of the subject on the bed based on the tared load value;
A pause determination unit that determines whether or not an instruction to pause the operation of the bed leaving determination unit is given;
A pause mode execution means for temporarily stopping the operation of the bed leaving determination means when it is determined by the pause determination means that a pause of the operation of the bed leaving determination means has been instructed;
When the temporary stop is released, a subtracted value obtained by subtracting the weight of the bed stored in the bed weight storage unit from the untarred processing load value output from the load detection unit and the subject stored in the weight storage unit And a same person determining means for determining whether or not the subject on the bed is the same person as the subject before being instructed to temporarily stop the operation of the bed leaving determination means based on the weight of the person ,
The bed occupancy status measuring system, wherein when the same person determining means determines that the subject on the bed is the same person, the operation of the bed related determining means is resumed.

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