WO2019059809A1

WO2019059809A1 - Method for controlling a device for measuring human physiological parameters

Info

Publication number: WO2019059809A1
Application number: PCT/RU2018/000469
Authority: WO
Inventors: Михаил Семенович РУБИН; Александр Владимирович КОЛЧИН; Августа Андреевна СУРГУЧЕВА
Original assignee: Общество С Ограниченной Ответственностью "Хилби"
Priority date: 2017-09-20
Filing date: 2018-07-16
Publication date: 2019-03-28
Also published as: RU2670670C9; RU2670670C1

Abstract

The invention relates to the field of measurements for diagnostic purposes, in particular to the control of devices containing a pressure sensor. The present control method is implemented by means of signals from a pressure sensor and an accelerometer used for measuring human physiological parameters. The present device is controlled by receiving and subsequently processing signals from the pressure sensor and the accelerometer, wherein a decision regarding the presence of control signals is taken upon detection of concurrent signals from the pressure sensor, caused by at least one click on the device housing, and signals from the accelerometer, detected when the user's arm is in a certain position.

Description

METHOD OF MANAGING THE MEASUREMENT DEVICE

PHYSIOLOGICAL PARAMETERS OF HUMAN

TECHNICAL FIELD

The invention relates to the field of measurements for diagnostic purposes, in particular for controlling a device for measuring physiological parameters attached to the human body.

BACKGROUND

Known methods of control devices designed to measure the physiological parameters that are fixed on the human body, for example, on his hand, and contain various sensors for measuring physiological parameters. These devices can be designed to measure, for example, a person’s heart rate, physical activity, and other parameters. Quite often, such devices need to enter commands for its proper functioning. For example, these are commands to block, unlock a device, start a measurement, confirm or select a command, and so on. For this purpose, various methods, push-button switches, touch devices are used.

A known method for a wearable device according to the application WO2015199747, publication 12/30/2015, IPC G06F-003/01, in which the wearable device includes a group of sensors that react to vibration occurring on the user's wrist when the user performs various finger gestures. For example, pressing, that is, by knocking, involving various individual fingers or various combinations of fingers.

There are also known ways to control the device mounted on the user's wrist, recognizing the movement of the hand. For example, in WO02099614, publication 12.12.2002, IPC G06F-003/00 disclosed a method for controlling a device by detecting motion, which operates on signals, in particular, an acceleration sensor (accelerometer).

The objective of the invention is to create a new method of controlling a device for measuring human physiological parameters. The technical result achieved in the invention is to increase the reliability method of controlling a device for measuring physiological parameters of a person.

DISCLOSURE OF INVENTION

A method is proposed for controlling a device for measuring the physiological parameters of a person, which includes a case fixed on a person’s hand, and an accelerometer installed in a case and a pressure sensor having contact with the human body. The device is controlled by receiving and subsequent processing of signals from the pressure sensor and accelerometer, and the decision on the presence of control signals is made when detecting coincident signals from the pressure sensor caused by at least one click on the device body and accelerometer signals detected by specific position of the user's hand.

The pressure sensor and accelerometer are used primarily to measure the physiological parameters of a person. When it is necessary to control the device, for example, enter a command or some data into the device, a certain position of the user's hand is fixed and a click on the device body is made. In this case, the signals taken from the pressure sensor change. These signal changes are isolated from the normal sensor signals (without making a click) and used as commands to control the device. After clicking on the device body, the pressure sensor continues to operate in the mode of measuring the physiological parameters of a person. It is important that it is made exactly click, or clicks on the device. It is the clicks on the body that make it possible to distinguish them from other signals, which, for example, occur when a person runs and vibrates due to movement of the bracelet on the wrist, or accidental impacts of the device body on solid objects.

In particular, the time of the first click on the instrument case and the time of the second click on the instrument case are determined, on the basis of which the time period between clicks is determined and the instrument is controlled using data on the specified time period. In the particular case of using the method, clicks carry out a certain number of times. At the same time maintain certain pauses between adjacent time clicks.

In addition, the click is carried out on the side of the housing, opposite to the side where the pressure sensor is installed.

A certain position of the user's hand may be the horizontal position of the forearm.

In particular, an additional indication is introduced for the user about the process or result of the control.

BRIEF DESCRIPTION OF THE DRAWINGS

The invention is illustrated in the following graphics.

FIG. 1 shows an example of the location of a device on a person’s wrist and user actions when controlling a device.

FIG. 2 shows a device with a housing and a pressure sensor.

FIG. 3 shows a graph of pressure sensor signals when clicking on the device body.

FIG. Figure 4 shows the graphs of the signals when clicking on the device case when the user is running.

FIG. 5 shows a graph of the signals of the pressure sensor when pressed on the body of the device for different duration of pressing.

FIG. 6 shows the graphs of the signals when the user is running and when clicking on the case.

IMPLEMENTATION OF THE INVENTION

The method in accordance with the present invention is implemented using the device. A device for measuring the physiological parameters of a person is fixed on his body. In this case, it is attached to the wrist (Fig. 1). The device includes a housing 1 and a pressure sensor 2 accelerometer mounted inside the housing (not shown in the figures). In this case, a piezoelectric sensor is used as a pressure sensor. In particular, a strain gauge can also be used as a pressure sensor. (Fig. 2).

The pressure sensor 2 has contact with the human body and is designed to measure one of the physiological parameters of a person, for example, heart rate. In this case, the device can measure other parameters.

The device is controlled by fixing a certain position of a person’s hand and by single or multiple clicks (click) on the body 1 or the strap of the device (Fig. 1). The specific position is the horizontal position of the forearm, which is characteristic when performing clicks on the body of the device. In particular, this may be the position of the raised hand, characteristic when looking at the body of the device when making clicks on the body.

At the same time, the length of time between clicks can be determined in advance for various control options, including various pauses between clicks. Pauses between clicks can also be pre-determined. Clicks on the device can be made through clothing. Clicks can also be made on the body or the strap of the device in gloves. At the same time, the distinguishability of these signals practically does not deteriorate.

It should be noted that in addition to clicks on the body of the device, a single or repeated pressing (pressing) on the body can be used to control it. During the research it turned out that clicks (click) on the instrument case generate signals at the output of pressure sensor 2, which differ from ordinary interference signals, for example, when striking the device case from human movements. Signals of pressing, pressing, it is also possible to distinguish from signals of interference.

The signals from the accelerometer, as well as the signals from the pressure sensor, are processed, in particular, in the sensor signal processing unit of the device for measuring physiological parameters. Accelerometer signals allow you to identify the position of the user's hand at any time. Processing of these signals can be done by one of the known methods.

The signal that occurs at the output of the pressure sensor when clicking on the output of the analog-to-digital converter is shown in FIG. 3. The analog-to-digital converter counts occurred after 5 milliseconds. It can be seen that these signals significantly exceed the level of physiological signals taken from the pressure sensor and can be easily identified.

FIG. Figure 4 shows the graphs of the pressure sensor signals when clicking through the body while running. These signals also significantly exceed the signals of the pressure sensor during the removal of the physiological parameter, despite the presence of interference arising from the movement of parts of the user's body, for example, hand movements. A particularly characteristic feature is the presence of a leading edge of the signal.

During the experiments, it also became clear that the signals arising from other work situations, for example, signals from the sensor during human movement, differ from the clicks signals on the body, and can be filtered during the processing of pressure sensor signals in order to extract click signals on the device body.

The combination of the detected accelerometer signals indicating a specific position of the hand and pressure sensor signals, in particular, a piezoelectric sensor indicating clicks on the instrument body, make it possible to increase the reliability of detecting the command to control the device. At the same time, the reliability of control is quite high and in difficult situations, for example, when exercising control while running.

For more confident control of the physiological parameter measuring device, feedback can be entered, that is, an indication of the duration and number of keystrokes for the user. Such an indication may be light sound or other kind. For example, when a control signal is selected, a click signal is given, or a series of signals with repeated clicks. In addition to sound, can be used vibration signals, light signals. All these signals can be transmitted by the device itself, or arrive to the user through his wearable devices, mobile phones, tablets, and so on.

In addition to clicking on the body, other equivalent actions may be applied to the device body, which can also be used for control. These actions include pressing the case. With Pressing the case also gives rise to signals from the pressure sensor, which are characterized by a special shape and noticeable amplitude.

Signals that occur at the output of a pressure sensor when pressed for a duration of 1 second, 2 seconds, and 3 seconds. shown in FIG. 5, the schedule - (a). It can be seen that these signals are characterized by a certain shape, when pressed and released, peaks of signals of different polarity occur. At the same time, these peaks significantly exceed the sensor signals when measuring the physiological parameter. Below, in the same figure, the graph (b) shows signals of the same duration after appropriate filtering in the processing device, which can then be used to control the device.

FIG. 6 shows the pressure sensor signals after pressing also different duration curve (a) and signals after the processing device, curve (b). These signals are obtained when the pressure sensor signals are taken while the user is running. As can be seen from the graph, in this case, the pressure signals on the body are easily distinguished from the interference signals that arise due to the movement of the user's body parts, for example, hand movements.

The processing of pressure sensor signals in order to extract depression signals can be performed by one of the known algorithms, for example, one of the known filtering algorithms. For example, the algorithm for recognizing the pressing signals can be constructed by determining the moving average of the signal from the pressure sensor for a certain period of time and setting a certain threshold in order to determine when it is exceeded.

As a result of comparing the various effects on the instrument case, it was found that the signals of quick clicks on the case are most confidently recognized.

INDUSTRIAL APPLICABILITY.

This method of controlling a device for measuring human physiological parameters can be applied both in devices for healthy people and in medical equipment. This method allows you to simplify the management of such devices. In the case of application in medical equipment, it is desirable to introduce an indication of the device for medical personnel about the transmitted control signals.

Claims

CLAIM

1. The method of controlling a physiological measuring device

parameters of a person, which includes a case fixed on a person’s hand, and an accelerometer installed in the case and a pressure sensor having contact with the human body, consisting in that the device is controlled by receiving and subsequent processing of signals from the pressure sensor and accelerometer, the solution about the presence of control signals taken when identifying coincident signals from the pressure sensor caused by at least one click on the device and accelerometer signals detected by a certain position of the user.

2. The method according to p. 1, characterized in that determine the time of the first

clicking on the instrument housing and the time of the second clicking on the instrument housing, on the basis of which the time period between clicks is determined and the instrument is controlled using data on the specified time period.

3. The method according to p. 2, characterized in that the clicks perform

a certain number of times.

4. The method according to p. 3, characterized in that it maintains certain pauses between adjacent time clicks.

5. The method according to p. 1, characterized in that the click on the body

carried out on the side of the housing, the opposite side where the pressure sensor is installed.

6. The method according to p. 1, characterized in that a certain position

The user's hand is the horizontal position of the forearm.

7. The method according to p. 1, characterized in that it further introduces

indication to the user about the process or result of management.