JP7747046B2 - Urinary volume management system - Google Patents

Description

The present invention relates to a urination volume management system.

To monitor the physical condition of patients with disorders of urine collection and urination functions, or to confirm the effectiveness of treatment, it is common to monitor daily urine output. Traditionally, urine volume was measured by collecting it in a urine collection cup during urination, but this procedure is both tedious and unhygienic. Furthermore, after measuring the volume of urine in the urine collection cup, the value had to be recorded on a record sheet.

In response to this, a urination volume management system has been proposed in which a patient's weight before and after urination is measured on a scale, and the urination volume is calculated from the weight loss (Patent Document 1). This system includes a scale and a urination volume management terminal connected to the scale via a wireless or wired communication line. The urination volume management terminal receives the weight measurements before and after urination sent from the scale via the communication line, and calculates the difference between these weight measurements as the urination volume. The calculated urination volume data is stored in a memory unit provided in the urination volume management terminal or in a management device connected to the urination volume management terminal via a communication line.

Japanese Patent Application Laid-Open No. 2018-175349

The above-mentioned urination volume management system allows patients to measure and record the amount of urine they urinate each time simply by stepping on a scale and weighing themselves before and after urination. However, because this is a different process from regular weight measurement (i.e., patients need to weigh themselves twice, before and after urination), it can be difficult for patients who are not accustomed to it to use it.

The problem to be solved by the present invention is to improve convenience for subjects in a urination volume management system that determines the urination volume of a subject from the results of measuring the subject's weight before and after urination.

The urination volume management system according to the present invention, which is made to solve the above problems, comprises:
a subject terminal having a voice instruction unit and a first control unit that controls the voice instruction unit;
a urination volume measuring meter configured to be capable of wireless communication with the subject terminal, the urination volume measuring meter having a weight measurement unit and a second control unit that causes the weight measurement unit to execute a weight measurement process;
a calculation device that calculates the amount of urine from the weight measurements obtained in each of the two weight measurement steps,
the urination volume measuring meter transmits a trigger signal to a first control unit of the subject terminal when each measurement step included in the two weight measurement steps is completed;
When the first control unit receives the trigger signal, it causes the voice instruction unit to output a voice instruction message having content instructing an operation corresponding to the trigger signal.

According to the urination volume management system of the present invention, by listening to the voice instruction message output from the voice instruction unit of the subject terminal while the two weight measurement processes are being carried out, the subject can easily recognize the next action to be taken, thereby improving convenience for the subject.

1 is a schematic overall configuration diagram of a urination information management system according to an embodiment of the present invention; FIG. 1 is a schematic block diagram of a urination volume measuring device and a user terminal that constitute a urination information management system. FIG. 10 is a diagram showing an example of a display screen of a user terminal for explaining the flow of a urine volume measurement process. FIG. 3B is an enlarged view of the operation instruction screen of FIG.

Below, an embodiment of the present invention is described based on the drawings.

[Overall configuration of the urination volume management system]
Fig. 1 is a diagram showing a schematic diagram of a urination volume management system 1 of this embodiment. Fig. 2 is a schematic block diagram of the urination volume management system 1. This urination volume management system 1 includes a measurement device 100 for measuring body weight, a user terminal 200 as a subject terminal, and an administrator terminal 300. The urination volume management system 1 is set up in a medical institution such as a hospital, the subject's home, etc. When the urination volume management system 1 is installed in a medical institution, a plurality of user terminals 200 may be used.

The measuring device 100 corresponds to the urination volume measuring meter of the present invention and has a flat housing 101. The user terminal 200 is composed of, for example, a smartphone or tablet terminal. The measuring device 100 and the user terminal 200 are each equipped with short-range wireless communication circuits (hereinafter simply referred to as "communication circuits") 180, 280, respectively, and are configured to be able to communicate wirelessly with each other. The administrator terminal 300 is, for example, a desktop, notebook, or tablet personal computer, and is connected to the user terminal 200 via short-range wireless communication. The administrator terminal 300 and the user terminal 200 may also be connected via a local network within the facility where the urination volume management system 1 is installed, or via the Internet.

[Configuration of measuring device]
The measuring device 100 is equipped with a CPU 170, a communication circuit 180, a power supply control circuit 160, an LED control circuit 165, an A/D conversion circuit 130, a USB/serial conversion circuit 145, memory (ROM (Read Only Memory) and RAM (Random Access Memory)) 171, a power supply battery 140, an LED 175, and a load cell 110, all of which are housed in a housing 101. The A/D conversion circuit 130 and the load cell 110 correspond to a weight measurement unit, and the CPU 170 corresponds to a second control unit.

The load cell 110 is a type of weight sensor in which strain caused by the weight of a patient or other person standing on the housing 101 appears as a change in resistance value. The change in resistance value is output from the load cell 110 as a voltage signal or current signal. The signal output from the load cell 110 is converted into a digital value by the A/D conversion circuit 130 and then input to the CPU 170.

The USB/serial conversion circuit 145 converts various signals input and output from the USB port 173 into serial data and inputs it to the CPU 170. The ROM stores a program that describes the processing procedures of the CPU 170, and the CPU 170 functions as a control unit by expanding the program into RAM or the like and executing it. The ROM also stores various tables (maps) used for various calculations. The CPU 170 performs various processes in the measuring device 100 in accordance with these programs and tables. The various processes are not limited to those performed by software, and can also be performed by dedicated hardware (electronic circuits).

The power supply control circuit 160 controls the charging and discharging of the built-in power supply battery 140 and monitors its remaining charge. The power supply control circuit 160 converts the fluctuating voltage of the battery 140 into the required constant voltages and supplies them to the CPU 170, memory 171, load cell 110, A/D conversion circuit 130, communication circuit 180, etc. The battery 140 is configured to be rechargeable via the USB port 173.

The power switch 176 is a switch for turning the measuring device 100 on and off. Even when the measuring device 100 is turned on by the power switch 176, it generally goes into a sleep state when not measuring weight in order to achieve low power consumption.

In the sleep state, the communication circuit 180 and some functions of the CPU 170 that control the communication circuit 180 in the measuring device 100 are running at low power. The communication circuit 180 starts periodically, and when communication is established with one of the user terminals 200, the CPU 170 starts up fully. It is preferable to use a communication circuit 180 that complies with the low-power standard, for example, Bluetooth (registered trademark) Low Energy. The CPU 170 displays the operating status of the measuring device 100 externally using the LED 175, an RGB indicator.

In the measuring device 100, after communication with the user terminal 200 is established, the CPU 170 changes from a low-power startup state to a state capable of high-performance calculations, causing the power supply control circuit 160 to power other units such as the load cell 110. Then, when measuring body weight, the CPU 170 begins calculating the signal from the load cell 110, increasing power consumption.

The CPU 170 has high processing power, capable of high-speed calculations up to the floating point, in order to realize weight measurement. Therefore, if the load cell 110 and downstream processing circuitry are kept in a standby state at all times to detect the load, power consumption will be high. Therefore, in the sleep state, the urination volume management system 1 of this embodiment periodically turns on and off the low-power communication circuit 180 and the CPU 170 that controls it. Then, once the CPU 170 of the measuring device 100 receives a wireless communication request from the user terminal 200, it starts up the entire device, including the load cell 110.

With the above configuration, the power consumption of the measuring device 100 in sleep mode can be limited to the power consumption of the communication circuit 180 and the CPU 170 in low power mode. In the urination volume management system 1, weight measurements are taken twice each time the patient urinates, once before and after urination, so the power consumption of the measuring device 100 increases significantly compared to when weight measurements are taken once a day, for example. In contrast, the measuring device 100 of this embodiment reduces power consumption in sleep mode, thereby dramatically extending the life of the battery 40.

[Configuration of user terminal]
The user terminal 200 is configured, for example, as a smartphone or tablet terminal, and is configured separately from the measurement device 100. The user terminal 200 includes a CPU 270, a memory 271, an input operation unit 274 consisting of a touch panel or buttons for accepting input operations, a display unit 210 for displaying a screen, a voice instruction unit 276, and a short-range wireless communication circuit 280. The CPU 270 functions as the first control unit and arithmetic unit of the present invention. There may be multiple user terminals 200 (for example, 1 to N; N is a natural number). When there are multiple user terminals 200, identification information for distinguishing each terminal from the other terminals is pre-stored in the memory 271.

Memory 271 stores a control program (system software), which is executed by CPU 270 to function as a control unit for user terminal 200. Memory 271 also stores application software dedicated to the urination volume management system 1. CPU 270 executes this software to send a wireless communication request, and communication between measuring device 100 and user terminal 200 occurs only when measuring device 100 receives this request. In other words, measuring device 100 does not respond to wireless communication requests sent from general smartphones or tablet devices. This configuration prevents personal information of the user (the owner of user terminal 200) sent and received between measuring device 100 and user terminal 200 from being leaked to third parties.

[Urination volume measurement process]
Next, a description will be given of a urine volume measurement process executed using the measurement device 100 and the user terminal 200. Fig. 3 shows an example of a screen displayed on the display unit of the user terminal 200 when the urine volume measurement process is being executed.

When the urine volume measurement process is executed, it is assumed that the power switch 176 is used to turn on the measuring device 100. When the power is turned on, the CPU 170 activates the communication circuit 180 and determines whether communication is established. If it determines that communication is not established, the CPU 170 goes into a sleep state for a certain period of time. After the certain period of time has elapsed, the CPU 170 activates the communication circuit 180 again and determines whether communication is established. In the sleep state, the measuring device 100 periodically repeats the process of activating the communication circuit 180 and determining whether communication is established.

Meanwhile, when the user starts up the user terminal 200, the CPU 270 executes the dedicated application software. As a result, an initial screen for measuring weight before urination is displayed on the screen of the display unit 210 (Figure 3 (1)). This initial screen displays the name and identification number of the user (subject) who owns the user terminal 200, as well as a GUI (Graphical User Interface) button 211 for confirming the intention to start the urination volume measurement process. This GUI button 211 consists of a rectangular frame with the word "Start" displayed within it.

When the CPU 270 detects that the user has touched the GUI button 211, the CPU 270 activates the communication circuit 280 to send a wireless communication request and determines whether communication can be established with the measuring device 100. If the measuring device 100 is not nearby or if the main power of the measuring device 100 is turned off, communication will not be established. If a preset timeout period has elapsed without communication being established, the CPU 270 switches the user terminal 200 to the OFF state.

If it is determined that communication with the measurement device 100 has been established, the CPU 270 transmits a command C1 to the measurement device 100. Upon receiving the command C1, the CPU 270 of the measurement device 100 returns a command A1 to the user terminal 200. Upon receiving the command A1, the CPU 270 of the user terminal 200 displays on the display unit 210 a screen (operation instruction screen) that instructs the user on the next operation to be performed (FIG. 3(2)).

In the following explanation, commands sent from the measuring device 100 to the user terminal 200 are marked with a symbol consisting of a combination of "A" and a number, and commands sent from the user terminal 200 to the measuring device 100 are marked with a symbol consisting of a combination of "C" and a number to distinguish between the two. Command A sent from the measuring device 100 to the user terminal 200 corresponds to a trigger signal.

Figure 4 is an enlarged view of the operation instruction screen in Figure 3 (2). This operation instruction screen displays a text message 221 ("Please stand on the measuring device") instructing the user to stand on the housing 101 of the measuring device 100 to measure weight, and an image 222 depicting a person about to stand on the measuring device 100. The operation instruction screen also displays a bar (progress bar) 223 indicating the progress of the urination volume measurement process, and supplementary information 224 regarding the status of the measuring device 100. The image 222 may be a still image or a video.

In addition, simultaneously with the screen display on the display unit 210, the CPU 270 causes the voice instruction unit 276 to output a voice message ("Please get on the measuring device") instructing the operation.

The user can therefore determine the next action to take by looking at the text message 221 and image 222 displayed on the screen of the display unit 210, or by listening to the audio message. In this way, the next action to take is instructed using both visual information (text message 221 and image 222) and auditory information (audio message), making the system easy to use even for users with impaired vision, hearing, or both, or cognitive problems. Furthermore, by expressing the content of the action instruction using image 222, the system is easy to use even for young children and foreign patients who are unable to understand text or audio instructions.

The progress bar 223 displayed on the operation instruction screen allows the user to visually grasp the progress of the urination measurement process. The supplementary explanation 224 also allows the user to proceed with the urination volume measurement process in association with the state of the measurement device 100.

If command "A1" is not sent from measuring device 100 even after a predetermined time has elapsed since user terminal 200 sent command "C1," CPU 270 sends command "C1" again. If command "A1" is not sent from measuring device 100 even after repeating the process of sending command "C1" multiple times (e.g., 10 times), an error screen is displayed on display unit 210.

Meanwhile, when communication with the user terminal 200 is established, the CPU 170 of the measuring device 100 transitions the circuits required for measurement, such as the load cell 110, from a sleep state to a measurable state. The CPU 170 then monitors the change in the resistance value of the load cell 110 for a certain period of time using the digital value obtained from the A/D conversion circuit 130.

When a user stands on the housing 101 of the measuring device 100, a digital value representing the change in resistance value of the load cell 110 is input from the A/D conversion circuit 130 to the CPU 170. The CPU 170 detects from this digital value that the user is standing on the housing 101 and transmits command A2 to the user terminal 200. Upon receiving command A2 from the measuring device 100, the CPU 270 of the user terminal 200 switches the screen of the display unit 210 to a screen indicating that weight measurement is in progress (Figure 3 (3)), and outputs a voice message from the voice instruction unit 276. This screen displays the text message "Measurement in progress, please do not move on the measuring device" to explain points to note during measurement, and displays an image of a person standing upright on the measuring device 100. In addition, a voice message with the same content as this text message is output from the voice instruction unit 276.

The CPU 170 also calculates the user's weight measurement value while performing processes such as averaging the digital values input from the load cell 110. This makes it possible to stably measure weight even if the user moves on the housing 101 and the change in the resistance value of the load cell 110 is unstable.

When the CPU 170 has finished calculating the user's weight measurement value, it sends command A3 to the user terminal 200. Upon receiving this command A3, the CPU 270 of the user terminal 200 switches the screen of the display unit 210 to a screen indicating that the measurement has ended (Figure 3 (4)), and outputs a voice message from the voice instruction unit 276. This screen displays a text message explaining what to do after the measurement has ended, saying "Measurement has ended. Please step off the measuring device," and displays an image of a person stepping off the measuring device 100. In addition, a voice message with the same content as this text message is output from the voice instruction unit 276.

When the user gets off the measuring device 100, the digital value input from the A/D conversion circuit 130 drops sharply. The CPU 170 detects from the change in the digital value that the user has gotten off the measuring device 100 and sends command A4 to the user terminal 200. The CPU 170 also obtains the user's weight value by subtracting the weight measurement value calculated from the digital value at that time from the weight measurement value when the user was standing on the measuring device 100. The obtained weight value is stored in memory 171 as the weight value before urination.

Furthermore, upon receiving command A4 from the measuring device 100, the CPU 270 of the user terminal 200 sends command C2 to the measuring device 100. Upon receiving command C2, the CPU 170 of the measuring device 100 reads the pre-urination weight value from memory 171 and sends it to the user terminal 200. Upon receiving the pre-urination weight value, the CPU 270 of the user terminal 200 stores that value in memory 271. Furthermore, the CPU 270 switches the screen of the display unit 210 to an action instruction screen (Figure 3 (5)) for instructing the user on the next action to be taken, and outputs a voice message from the voice instruction unit 276. At the same time, the user terminal 200 sends command C3 to the measuring device 100.

This operation instruction screen displays a text message saying, "Measure again after urinating in the toilet," along with images showing the action of urinating in the toilet and getting on the measuring device 100. In addition, an audio message with the same content as this text message is output from the audio instruction unit 276.

Upon receiving command C3 from the user terminal 200, the CPU 170 of the measuring device 100 sends command A5 to the user terminal 200. Upon receiving command A5, the CPU 270 of the user terminal 200 disconnects communication with the measuring device 100 and puts the user terminal 200 into a sleep state.

When a predetermined time has elapsed since the user terminal 200 entered sleep mode, the CPU 270 displays an initial screen for measuring weight after urination on the screen of the display unit 210 (FIG. 3(6)). This initial screen displays a GUI button 212 for confirming the user's intention to start the post-urination weight measurement process. This GUI button 212 consists of a rectangular frame with the words "Proceed to post-urination measurement" displayed within it.

When the CPU 270 detects that the user has touched the GUI button 212, the CPU 270 activates the communication circuit 280 to send a wireless communication request and determines whether communication can be established with the measuring device 100. If the measuring device 100 is not nearby or if the main power of the measuring device 100 is turned off, communication will not be established. If the state in which communication is not established continues for a preset timeout period, the CPU 270 returns the user terminal 200 to a sleep state.

In addition, if a predetermined time has elapsed since the initial screen for measuring weight after urination was displayed on the display unit 210 and no touch operation has been performed on the GUI button 212, the CPU 270 also returns the user terminal 200 to the sleep state. After the predetermined time has elapsed since the user terminal 200 returned to the sleep state, the CPU 270 causes the initial screen for measuring weight after urination to be displayed again on the screen of the display unit 210.

After displaying the initial screen for measuring weight after urination on the display unit 210, the user terminal 200 returns to sleep mode, and the process of displaying the initial screen on the display unit 210 again is repeated multiple times (e.g., 10 times) (snooze function). If communication is not established between the user terminal 200 and the measuring device 100 even after the above process has been repeated multiple times, or if the GUI button 212 is not touched, the CPU 270 discards the weight value data stored in the memory 271 and ends the urination volume measurement process.

On the other hand, when the GUI button 212 is touched and it is determined that communication between the user terminal 200 and the measuring device 100 has been established, the CPU 270 sends command C1 to the measuring device 100. From this point onwards, the operations of the measuring device 100 and the user terminal 200 that are carried out until the user's weight measurement is completed, the screens displayed on the display unit 210 of the user terminal 200 (Figures 3 (7) to (9)), and the voice messages output from the voice instruction unit 276 are the same as those when measuring weight before urination, and therefore will not be described here.

When the CPU 170 of the measuring device 100 has calculated the user's weight value after urination, it transmits this weight value to the user terminal 200. Upon receiving the post-urination weight value, the CPU 270 of the user terminal 200 reads the pre-urination weight value stored in memory 271 and calculates the urination volume. The urination volume is obtained by subtracting the post-urination weight value from the pre-urination weight value. If necessary, the weight value may be converted to volume using the standard density of urine. The calculated urination volume is displayed on the screen of the display unit 210 (Figure 3 (10)) and is also stored in memory 271. This screen displays the urination volume as well as a GUI button 213 that prompts the user to move to the next screen. This button 213 consists of a rectangular frame with the word "Next" displayed within it.

When the GUI button 213 is touched, the CPU 270 displays a screen (additional information selection screen) on the display unit 210 for the user to input additional information. For example, Figure 3 (11) is a screen for selecting whether or not the additional information is urination while asleep, and Figure 3 (12) is a screen for selecting whether or not there is an urge to urinate, whether or not there is urinary leakage, and whether or not there is feces as additional information. These additional information selection screens display GUI buttons as selection buttons. In addition to these, the additional information that can be selected includes an evaluation of the amount of urine voided, whether or not there is blood in the urine, whether or not there is pain during urination, etc.

When input of additional information by touching the GUI button on the additional information selection screen is completed, the CPU 270 stores the calculated urination volume and additional information in memory 271 along with the date, month, year, and time. The CPU 270 also transmits the data stored in memory 271, such as the urination volume and additional information, to the administrator terminal 300. Figure 3 (13) shows a standby screen indicating that data is being transmitted from the user terminal 200 to the administrator terminal 300, and Figure 3 (14) shows an end screen indicating that data transmission has ended and all urination volume measurement processing has been completed.

(Modification)
The present invention is not limited to the above-described embodiment and can be modified as appropriate.
For example, in the above embodiment, an operation instruction screen is displayed on the display unit 210 of the user terminal and at the same time a voice instruction message is output from the voice instruction unit 276, but it is also possible to output only the voice instruction message from the voice instruction unit 276 without displaying the operation instruction screen on the display unit 210.

In addition, during the urine volume measurement process, an audio message is always output from the audio instruction unit 276 when an operation instruction screen is displayed on the display unit 210, but it is also possible to output an audio message from the audio instruction unit 276 when a portion of the operation instruction screen is displayed on the display unit 210.

Furthermore, the above-mentioned embodiment and the various modifications described above are merely examples of the present invention, and it is natural that any appropriate modifications, modifications, additions, etc. made within the spirit of the present invention will also be encompassed within the scope of the claims of this application.

It will be understood by those skilled in the art that the exemplary embodiments described above are specific examples of the following aspects:

(Section 1)
The urination volume management system of paragraph 1 is:
a subject terminal having a voice instruction unit and a first control unit that controls the voice instruction unit;
a urination volume measuring meter configured to be capable of wireless communication with the subject terminal, the urination volume measuring meter having a weight measurement unit and a second control unit that causes the weight measurement unit to execute a weight measurement process;
a calculation device that calculates the amount of urine from the weight measurements obtained in each of the two weight measurement steps,
the urination volume measuring meter transmits a trigger signal to a first control unit of the subject terminal when each measurement step included in the two weight measurement steps is completed;
When the first control unit receives the trigger signal, it causes the voice instruction unit to output a voice instruction message having content instructing an operation corresponding to the trigger signal.

In the urination volume management system of paragraph 1, the two weight measurement steps are steps in which the subject steps onto the urination volume measuring device to measure their weight before and after urination. Furthermore, "actions corresponding to a trigger signal" include, for example, the subject stepping onto the urination volume measuring device, stepping off the urination volume measuring device, or going to the toilet to urinate after the first weight measurement step.

According to the urination volume management system of paragraph 1, the subject can easily recognize the next action to be taken by listening to the voice instruction message output from the voice instruction unit of the subject terminal while the weight measurement process is being performed using the urination volume measuring meter.

(Section 2)
In the urination volume management system of paragraph 1,
The subject terminal further has a display unit,
The first control unit may be configured to cause the display unit to display an instruction screen corresponding to the voice instruction message in conjunction with the voice instruction unit.

(Section 3)
In the urination volume management system of paragraph 2,
The instruction screen may be a character string and/or an image indicating the content of the voice instruction message.

According to the urination volume management system of paragraphs 2 and 3, the subject can be instructed to perform an action using both auditory information in the form of a voice instruction message and visual information in the form of an instruction screen displayed on the display unit.

(Section 4)
In any of the urination volume management systems of paragraphs 1 to 3, the first control unit may cause the voice instruction unit to output the voice instruction message when a predetermined time has elapsed since receiving the signal from the urination volume meter.

According to the urination volume management system of paragraph 4, even if the subject is located far away from the urination volume measuring meter and the subject terminal is unable to receive signals from the urination volume measuring meter, an audio instruction message can be output from the audio instruction unit of the subject terminal.

(Section 5)
In any of the urination volume management systems of paragraphs 1 to 4, the first control unit can be configured to output, from the audio instruction unit, an audio instruction message prompting the execution of a second weight measurement process when a predetermined time has elapsed since receiving a signal transmitted from the urination volume meter when the first weight measurement process is completed.

For example, if a subject goes to the toilet after completing the first weight measurement (before urination), but forgets to measure their weight after urination and moves away from the urination volume measuring device, the subject terminal will not be able to receive signals from the urination volume measuring device. Even in such a case, the urination volume management system of paragraph 5 can output an audio instruction message from the audio instruction unit of the subject terminal to remind the subject to measure their weight a second time (after urination).

(Section 6)
In any one of the urination volume management systems of paragraphs 1 to 5,
the weight measurement unit is configured to be able to transition between a sleep state and a measurement state in which power consumption is higher than that of the sleep state,
When the second control unit receives a startup request signal from the subject terminal, it transitions the weight measurement unit from the sleep state to the measurable state, and after the weight measurement unit has completed transitioning to the measurable state, the trigger signal can be transmitted from the urination volume measuring meter to the subject terminal.

According to the urination volume management system of paragraph 6, the weight measurement unit is in a sleep state until the weight measurement process is performed in the weight measurement unit, thereby reducing the power consumption of the urination volume meter.

1... Urination volume management system 100... Measuring device 110... Load cell 130... A/D conversion circuit 140... Power supply battery 145... USB/serial conversion circuit 160... Power supply control circuit 165... LED control circuit 170... CPU
171...Memory 173...USB port 175...LED
176: Power switch 180: Communication circuit 200: User terminal 210: Display unit 270: CPU
271... Memory 274... Input operation unit 276... Voice instruction unit 280... Short-distance wireless communication circuit 300... Administrator terminal

Claims (6)

a subject terminal having a voice instruction unit, a first control unit that controls the voice instruction unit, and a display unit;
a urination volume measuring meter configured to be capable of wireless communication with the subject terminal, the urination volume measuring meter having a weight measurement unit and a second control unit that causes the weight measurement unit to execute a weight measurement process;
a calculation device that calculates the amount of urine from weight measurements obtained in the two weight measurement steps, i.e., a pre-urination weight measurement step and a post-urination weight measurement step,
the urination volume measuring meter transmits a trigger signal to a first control unit of the subject terminal when each measurement step included in the pre-urination weight measuring step and the post-urination weight measuring step is completed, and when the pre-urination weight measuring step is finished;
a first control unit that, upon receiving the trigger signal, causes the voice instruction unit to output an audio instruction message instructing the subject to perform an operation corresponding to the trigger signal, and, upon completion of the pre-urination weight measurement process, causes the voice instruction unit to output the audio instruction message prompting the subject to perform the post-urination weight measurement process, and then causes the subject terminal to enter a sleep state; and, upon a predetermined time having elapsed since the subject terminal entered the sleep state, causes the display unit to display a reception unit that receives an instruction to start the post-urination weight measurement process, and receives an instruction to start the post-urination weight measurement process in response to an operation of the reception unit by the subject. The urine volume management system according to claim 1 , wherein the first control unit causes the display unit to display an instruction screen corresponding to the voice instruction message in conjunction with the voice instruction unit. The urination volume management system of claim 2, wherein the instruction screen is a character string and/or an image indicating the content of the audio instruction message. The urine volume management system of claim 1, wherein the first control unit causes the audio instruction unit to output the audio instruction message when a predetermined time has elapsed since receiving the trigger signal from the urine volume measuring meter. The urine volume management system of claim 1, wherein the first control unit causes the audio instruction unit to output an audio instruction message prompting the execution of the post-urination weight measurement process when a predetermined time has elapsed since receiving the trigger signal transmitted from the urine volume meter when the pre-urination weight measurement process is completed. the weight measurement unit is configured to be able to transition between a sleep state and a measurement-enabled state that consumes more power than the sleep state,
2. The urination volume management system according to claim 1, wherein, when the second control unit receives a startup request signal from the subject terminal, the second control unit transitions the weight measurement unit from the sleep state to the measurable state, and after the weight measurement unit has completed transitioning to the measurable state, the trigger signal is transmitted from the urination volume measuring meter to the subject terminal.