JP7708705B2 - Operation status display system and nurse call system - Google Patents

Description

This disclosure relates to an operation status display system that displays the operation status of a camera that detects a specific state, such as a patient getting up or getting out of bed, and a nurse call system that includes the operation status display system.

Conventionally, hospitals and other facilities have developed camera technology that installs cameras in patient rooms and detects the patient's state, such as when the patient wakes up. For example, Patent Document 1 introduces a nurse call system technology that captures the patient with a camera installed near the patient's bed, analyzes the captured image, and detects the patient's state, such as when the patient wakes up, with high accuracy.

JP 2018-209937 A

By the way, it is desirable for cameras that detect the condition of patients to always operate normally so that accidents such as falls or wandering can be dealt with quickly. For this reason, there has been a demand in medical and nursing care settings for a way to easily check the operating status of cameras.

The objective of this disclosure is to provide an operation status display system that displays the operation status of a camera that detects a patient's state, such as waking up, and a nurse call system equipped with the operation status display system.

To solve the above problems, the operation status display system disclosed herein is an operation status display system that displays the operation status of a camera, and is characterized in that it includes a camera installed near the patient's bed, a detection means for detecting a person and the bed included in the camera's image, and a determination means for determining the relative position of the person with respect to the bed, and the camera includes a display means for displaying the relative position.

The operation status display system disclosed herein determines the relative position of the person in the camera's image relative to the bed and displays the relative position on the camera, which has the effect of allowing the user to easily check the camera's operation by simply looking at the camera.

FIG. 1 is a system diagram of a nurse call system showing one embodiment of the present disclosure. FIG. 2 is a front view showing the appearance of the camera. 1 is a block diagram showing a configuration of an operation state display system; FIG. 1 is a schematic diagram showing an example of camera installation. FIG. 2 is a schematic diagram showing an image captured by a camera. 10 is a schematic diagram showing the position of a person and the lighting state of an LED. FIG. 10 is a schematic diagram showing the position of a person and the lighting state of an LED. FIG. 1A and 1B are schematic diagrams showing a case in which the position of a person is determined and a case in which the position is not determined. 5 is a flowchart showing the operation of an operation state display unit.

Below, an embodiment of the present disclosure embodied in a nurse call system equipped with an operating status display system will be described with reference to the drawings.

As shown in Figures 1 to 3, the nurse call system 1 of this embodiment is composed of a nurse call master 6 installed in a nurse station, a mobile terminal 10 such as a PHS or smartphone carried by a nurse, a control unit 7 installed in a management room or the like, a relay unit 8 such as an IP-PBX installed in a server room or the like, base stations 9 arranged in various places in the hospital, a corridor light 4 installed in the corridor, a nurse call handset 5 installed near a patient bed 51, a camera 3 installed near a patient bed 51, and a nurse call server 2 that provides information related to the nurse call system 1. The relay unit 8, the control unit 7, the corridor light 4, the nurse call master 6, and the nurse call server 2 are connected by a LAN line L1, the nurse call handset 5 is connected to the corridor light 4 by a transmission line L2, and the camera 3 is connected to the corridor light 4 by a transmission line L3.

The camera 3 includes a CPU 31 that controls the camera 3, a photographing unit 32 that photographs the image 12, a display unit 33 that displays the relative position of the person 52 with respect to the bed 51, and a detection unit 37 that detects a predetermined condition of the patient based on the image 12. The detection unit 37 has a function of detecting the person 52 and the bed 51 included in the image 12. The detection unit 37 also includes a determination unit 38 that determines the relative position of the person 52 with respect to the bed 51. The display unit 33 has a bed area 35 that shows the bed 51 in a schematic manner, LEDs 36 (36a to 36e) as lighting means, and a lighting control unit 34 that turns the LEDs 36 on and off.

As shown in Figure 4, the camera 3 is installed on the pillow side wall of the bed 51 (Figure 4(a)) or on the bedside (Figure 4(b)) and constantly captures the area around the bed.

The detection unit 37 analyzes the video 12 and detects a specific state of the patient (not shown) contained in the video 12. In the video analysis, a known video analysis technique can be adopted, and for example, SIFT (Scale Invariant Feature Transform) or SURF (Speed-Up Robust Features) can be selected. The patient's states include lying on the bed 51 (lying down), sitting with the upper body raised on the bed 51 (getting up), sitting on the edge of the bed 51 (sitting on the edge), leaving the bed 51 (getting out of bed), standing up (standing up), lying on the floor (falling), falling off the bed 51 (falling down), etc.

The detection unit 37 also analyzes the video 12 and detects the person 52 around the bed and the bed 51 contained in the video 12. At this time, the detection unit 37 may be configured to distinguish between a patient and a person other than a patient 52, and to detect only the person other than a patient 52. The determination of whether the person is a patient or a person other than a patient 52 can be made, for example, based on the identity of the person with the patient who is the detection target of the state ST, the distance d from the bed 51, etc.

Figure 5 shows the image 12, and the person 52 and bed 51 detected in the image 12. In Figure 5, the image 12 is shown upside down to make it easier to compare with the display unit 33. As shown in Figure 5, the determination unit 38 determines the relative position of the person 52 with respect to the bed 51 based on the detected person 52 and bed 51. For example, as shown in Figure 5 (a), the determination unit 38 can compare the person 52 with each point P (Pa to Pe) and determine the closest point Pa as the relative position. Alternatively, as shown in Figure 5 (b), it is possible to divide the area around the bed 51 into predetermined blocks B (Ba to Be) and determine the block Ba containing the person 52 as the relative position. Alternatively, the determination unit 38 may perform machine learning using the image 12 to determine the relative position.

As shown in FIG. 6, the display unit 33 lights up the LED 36 corresponding to the relative position. Specifically, the lighting control unit 34 of the display unit 33 lights up the LED 36e on the right side of the bed area 35 when the relative position is point Pe on the right side of the bed 51 (FIG. 6(a)), lights up the LED 36a on the left side of the bed area 35 when the relative position is point Pa on the left side of the bed 51 (FIG. 6(b)), and lights up the LED 36c on the lower side of the bed area 35 when the relative position is point Pc on the foot side of the bed 51 (FIG. 6(c)).

When the relative position is point Pd at the lower right corner, the lighting control unit 34 lights up the LED 36e on the right side of the bed area 35 and the LED 36c on the lower side (Fig. 7(a)). The display unit 33 may be provided with an LED 36d at the lower right corner, and the LED 36d may be turned on (Fig. 7(b)).

As shown in FIG. 8, the determination unit 38 determines the relative position when the distance d between the bed 51 and the person 52 is within a predetermined distance D (d≦D), and does not determine the relative position when the distance d between the bed 51 and the person 52 exceeds the predetermined distance D (d>D). Here, the distance D is preferably about 50 cm. This is because if the relative position of a person 52 that is too far away is displayed, the relative positions of multiple people 52 will be displayed and it will be impossible to check the operating state. Note that the distance d can be changed as appropriate depending on the arrangement of the beds 51 in the hospital room, etc.

Next, the operation of the operation status display system 11 in the nurse call system 1 configured as above will be described with reference to FIG. 9. First, when the photographing unit 32 of the camera 3 photographs the area around the bed (S1), the detection unit 37 of the camera 3 performs image analysis and detects the person 52 and bed 51 contained in the image 12 (S2). Here, if the distance d between the person 52 and the bed 51 exceeds a predetermined distance (d>D), the process ends (S3: No).

On the other hand, if the distance d between the person 52 and the bed 51 is within a predetermined distance (d≦D) (S3: Yes), the determination unit 38 determines the relative position of the person 52 with respect to the bed 51 (S4). The display unit 33 (lighting control unit 34) of the camera 3 lights up the LED 36 corresponding to the relative position (S5).

According to the above-described nurse call system 1, the operating state of the camera 3 can be checked simply by standing around the bed 51, allowing medical personnel and the like to easily perform a visual check test. In addition, while there is also a method of using gesture recognition using image analysis to test the detection unit 37, using human detection as disclosed herein is less difficult and can be developed at a lower cost.

In addition, the relative position of person 52 with respect to bed 51 is indicated by lighting LED 36, so it can be confirmed that bed 51 has been detected correctly. In other words, if LED 36 does not light up even when standing around bed 51, there is a possibility that erroneous detection of bed 51 has occurred, which may be an opportunity to review the settings of detection unit 37.

The present disclosure is not limited to the above embodiment, and the configuration of each part may be arbitrarily changed without departing from the spirit of the present disclosure, for example, as in (1) or (2) below. For example, the number of LEDs 36 may be appropriately changed.
(1) The number and arrangement of the LEDs 36 may be changed as appropriate.
(2) The detection unit 37 and/or the judgment unit 38 are installed in the nurse call server 2.

Reference Signs List 1 Nurse call system 2 Nurse call server 3 Camera 4 Corridor light 5 Nurse call handset 6 Nurse call master 7 Controller 8 Relay device 9 Base station 10 Mobile terminal 12 Video 31 CPU
32 Photographing unit 33 Display unit 34 Lighting control unit 35 Bed area 36 LED
37: detection unit 38: determination unit 51: bed 52: person B: block P: point L1: LAN lines L2, L3: transmission lines

Claims (5)

An operation display system for displaying an operation state of a camera, comprising:
A camera is installed near a patient's bed, a detection unit detects a person and the bed included in an image of the camera, and a determination unit determines a relative position of the person with respect to the bed,
4. An operating status display system, wherein the camera includes a display means for displaying the relative position. The determination means outputs any one of a plurality of points around the bed as a relative position,
The display means includes a bed area indicating the bed and a lighting means indicating the plurality of points,
2. The operating state display system according to claim 1, wherein said display means lights up a lighting means corresponding to said relative position. The operation status display system according to claim 1 or 2, wherein the determination means does not determine the relative position of the person who is at a predetermined distance or more from the bed. The camera includes the detection means and the determination means.
4. An operation status display system according to claim 1. A nurse call system equipped with an operation status display system according to any one of claims 1 to 4.