JP2021156458A - Door opening/closing detection device and program - Google Patents

Abstract

To highly accurately detect opening/closing operation of a door without installing a special circuit or device to a storage room.SOLUTION: A door opening/closing detection device includes: an acquisition unit (11) for acquiring internal temperature data of a storage room (2); a calculation unit (12) for calculating a differential value of the temperature data acquired by the acquisition unit (11); and a detection unit (14) for detecting opening/closing operation of a door for the storage room (2) on the basis of the differential value calculated by the calculation unit (12).SELECTED DRAWING: Figure 1

Description

The present invention relates to a door opening / closing detection device and a program for detecting the opening / closing of a door of a storage such as a refrigerator or a freezer.

In recent years, in the restaurant business such as family restaurants, we have been working on energy saving of stores from the viewpoint of environmental protection and management efficiency. One of them is an effort to reduce the power consumption of food storages such as refrigerators and freezers installed in restaurant kitchens. By opening and closing the storage, warm air flows into the storage and cold air in the storage leaks to the outside, and as a result, the temperature inside the storage rises. Since such an increase in the temperature inside the refrigerator leads to power consumption, it is required as an energy saving measure to reduce the opening / closing operation of the door and shorten the opening time of the door. Therefore, it is required to easily grasp the open / closed state of the storage door.

As a means for detecting the opening / closing of the door of a storage such as a refrigerator or a freezer, for example, a method of forming a door detection circuit by an electric circuit using a magnet, a Hall element, a switch, or the like is known (see Patent Document 1). Further, for example, in order to detect a gap in the door, a method is known in which a temperature detecting means is installed on the back surface of the door to detect a temperature change on the back surface of the door due to the ingress of outside air (see Patent Document 2).

Japanese Unexamined Patent Publication No. 8-240912 Japanese Unexamined Patent Publication No. 2008-39198

However, the method of detecting the opening / closing of the door by configuring the door detection circuit as in Patent Document 1 has a problem that labor and cost for installing the circuit in the storage are required. Further, the method of detecting the gap of the door as in Patent Document 2 has a problem that it takes time and cost to install a dedicated thermometer on the back surface of the door and it is not possible to accurately detect the opening / closing operation of the door. there were.

An object of the present invention has been made in view of the above problems, and to provide a door opening / closing detection device and a program capable of detecting a door opening / closing operation with high accuracy without attaching a special circuit or device to the storage. To do.

In order to solve the above problems, the first aspect according to the present invention is an acquisition unit that acquires temperature data in the storage, a calculation unit that calculates a differential value of the temperature data acquired by the acquisition unit, and the calculation. A detection unit for detecting the opening / closing operation of the door of the storage is provided based on the differential value calculated by the unit.

Further, a determination unit for determining whether or not the differential value exceeds the first threshold value is further provided, and when the determination unit determines that the differential value exceeds the first threshold value, the detection unit includes a determination unit. , It is preferable to detect the opening operation of the door.

Further, the determination unit further determines whether or not the differential value has fallen below the second threshold value, and the detection unit determines when the differential value exceeds the first threshold value by the determination unit. When the determination unit determines that the differential value is below the second threshold value, it is preferable to detect the closing operation of the door.

A second aspect of the present invention is a program, in which the computer has an acquisition unit for acquiring temperature data in the storage and a calculation unit for calculating the differential value of the temperature data acquired by the acquisition unit. Based on the differential value calculated by the calculation unit, the storage unit functions as a detection unit for detecting the opening / closing operation of the door.

According to the aspect of the present invention, by utilizing a temperature detecting means such as a thermometer provided for temperature control in the storage, the opening and closing operation of the storage door can be performed with high accuracy without requiring special capital investment. Can be detected with.

It is a block diagram which shows the structure of the door open / close detection device which concerns on this embodiment, and the structure of the detection system to which a door open / close detection device is applied. It is a graph which shows the temperature data, the differential value of the temperature data, and the time change of the detection of the opening / closing of a door. It is a flow figure which shows the processing procedure of the door open / close detection which concerns on this Embodiment.

A preferred embodiment of the present invention will be described with reference to the drawings. The embodiment shown below is an example, and various forms can be taken within the scope of the present invention.

A detection system to which the door open / close detection device according to the present embodiment is applied will be described. As shown in FIG. 1, the detection system includes a door open / close detection device 1, a refrigerator 2, a thermometer 3, a network 4, and a display device 5.

The door open / close detection device 1 is, for example, a program processing device (computer) such as a server, a personal computer, or a tablet terminal. The information processing device 1 detects the opening and closing of the door of the storage 2 based on the temperature data acquired from the thermometer 3 installed in the storage 2 such as a refrigerator or a freezer via the network 4, and outputs the detection result to the output device 5. Output to.

The thermometer 3 is mounted inside the storage 2, measures the temperature inside the storage, and transmits temperature data to the outside via the network 4. The applicable thermometer 3 is not limited, and in addition to the one in which temperature data is directly transmitted from the thermometer 3, the communication function in which the temperature data measured by the thermometer 3 is connected to the thermometer 3. It may be configured to be indirectly transmitted via.

When the output device 5 functions as a display device, examples thereof include display devices such as an LCD (Liquid Crystal Display) and an organic EL (Electroluminescence) display. Further, the output device 5 may be a device that outputs information on the notification result by voice or the like, in addition to the display device that visually displays the display device.

<Configuration of door open / close detection device>
The configuration of the door open / close detection device according to the present embodiment will be described with reference to FIG. The door open / close detection device 1 includes an acquisition unit 11, a calculation unit 12, a determination unit 13, a detection unit 14, and an output unit 15.

These components are realized by operating the hardware resources constituting the door open / close detection device 1 according to the program (software) installed in the door open / close detection device 1. That is, the door open / close detection device (computer) 1 functions as an acquisition unit 11, a calculation unit 12, a determination unit 13, a detection unit 14, and an output unit 15 according to the program installed in the door open / close detection device 1.

(Acquisition department)
The acquisition unit 11 acquires temperature data transmitted from the thermometer 3 attached to the refrigerator 2 via the network 4. The acquisition unit 11 acquires temperature data at predetermined time intervals, for example, in units of 1 second. The temperature data acquired by the acquisition unit 11 may include information on the ID of the storage in order to identify which storage the temperature data is transmitted from, in addition to the information on the temperature itself.

(Calculation part)
The calculation unit 12 calculates the differential value of the temperature data based on the temperature data acquired by the acquisition unit 11. The differential value of the temperature calculated by the calculation unit 12 corresponds to the change value of the temperature per unit time, and is represented by, for example, the temperature change per second (° C./sec). As shown in FIGS. 2 (A) and 2 (B), the differential value of the temperature data calculated by the calculation unit 12 varies according to the change in the temperature data acquired by the acquisition unit 11. When the temperature inside the refrigerator is rising, the differential value becomes a positive value, while when the temperature inside the refrigerator is falling, the differential value becomes a negative value.

(Judgment unit)
The determination unit 13 determines whether or not the differential value of the temperature data calculated by the calculation unit 12 exceeds a predetermined threshold value. The predetermined threshold value is a value that serves as a criterion for detecting the opening operation or closing operation of the door of the storage 2.

When detecting the opening operation of the door of the storage 2, the determination unit 13 determines whether or not the differential value (temperature change per unit time) of the temperature data exceeds the first threshold value. As shown in FIG. 2, the first threshold value is set in a state where the temperature of the storage 2 rises and the differential value increases. When the differential value of the temperature data exceeds the first threshold value, it means that the temperature inside the refrigerator is rapidly rising, and it is determined that the door opening operation has occurred. On the other hand, when the differential value of the temperature data does not exceed the first threshold value, it means that the temperature inside the refrigerator is rising but the temperature rise is gradual. In this case, the temperature inside the refrigerator is rising. It is judged that the temperature rises due to temperature control.

The first threshold value is appropriately set according to the temperature in the storage 2, the volume of the storage 2, the installation position of the thermometer, and the like. For example, when the storage 2 is a freezer and the temperature rises from a normal state in which the temperature inside the refrigerator fluctuates in the range of -19.6 ° C to -18.3 ° C, the first threshold value is 1.4 ( ℃ / sec) is set. That is, it means that the first threshold value is reached when the differential value of the temperature data corresponding to the temperature change per second reaches 1.4 (° C./sec).

When detecting the closing operation of the door of the storage 2, when it is determined that the differential value of the temperature data exceeds the first threshold value, the determination unit 13 determines that the differential value of the temperature data (temperature change per unit time) is the first. It is determined whether or not the threshold value of 2 has been exceeded. As shown in FIG. 2B, the second threshold value is set at the timing when the temperature of the storage 2 changes from rising to falling, in other words, when the differential value of the temperature data changes from a positive value to a negative value. When the differential value of the temperature data falls below the second threshold value, it means that the temperature inside the refrigerator, which has been rising or maintained at a constant temperature, has begun to fall, and the door closing operation occurs. Is judged. On the other hand, when the differential value of the temperature data does not fall below the second threshold value, it means that the inside of the refrigerator is not in a state where it can be cooled, and it is determined that the door remains open.

The second threshold value is set to a value at which the differential value of the temperature data is 0 (° C./sec) or less. For example, when the second threshold value is set to 0 (° C./sec), it is determined that the second threshold value has fallen below the second threshold value at the timing when the differential value of the temperature data changes from a positive value to a negative value. The second threshold is not limited to 0 (° C./sec). Even if the differential value of the temperature data turns to a negative value, it is assumed that the door is not completely closed, so the second threshold is negative to ensure that the door is completely closed. It may be set to a predetermined value.

(Detector)
The detection unit 14 detects that an opening operation has occurred at the door of the storage 2 when the determination unit 13 determines that the differential value of the temperature data exceeds the first threshold value. Further, in the state where the occurrence of the opening operation is detected, the detection unit 14 causes the closing operation at the opened door when the determination unit 13 determines that the differential value of the temperature data is below the second threshold value. Detect what you have done. The information detected by the detection unit 14 is digitized (graphed) as shown in FIG. 2C, for example, and becomes 0 when the occurrence of the door opening operation is not detected, and the occurrence of the opening operation is detected. After that, it takes a predetermined value (for example, 5) and maintains the value while it is open. Then, after the occurrence of the door closing operation is detected, the value becomes 0 again.

(Output section)
The output unit 15 outputs the result (door opening operation and door closing operation) detected by the detection unit 14 to the output device 5. The information output by the output unit 15 may include information associated with the detection result, such as ID information of the storage 2, in addition to the information regarding the detection result by the detection unit 14.

(Procedure for door open / close detection process)
A processing procedure for detecting the opening / closing of the door of the storage 2 will be described with reference to FIG. 3 using the door opening / closing detection device 1 according to the present embodiment.
First, the temperature data transmitted from the thermometer in the storage 2 is acquired by the acquisition unit 11 (step S1).
Next, the calculation unit 12 calculates the differential value of the temperature data based on the acquired temperature data (step S2).

Next, the determination unit 13 determines whether or not the differential value of the calculated temperature data exceeds the first threshold value (step S3). If it is determined in step S3 that the differential value of the calculated temperature data does not exceed the first threshold value, the process returns to step S1 to acquire the temperature data.
On the other hand, when it is determined that the differential value of the calculated temperature data exceeds the first threshold value, the detection unit 14 detects the opening operation of the door (step S4).

Next, in order to grasp the behavior of the differential value of the temperature data after the door opening operation is detected, the temperature data transmitted from the thermometer in the storage 2 is acquired again by the acquisition unit 11 (step S5). ..
Next, the calculation unit 12 calculates the differential value of the temperature data based on the acquired temperature data (step S6).

Next, the determination unit 13 determines whether or not the differential value of the calculated temperature data has fallen below the second threshold value (step S7). If it is determined in step S7 that the differential value of the calculated temperature data does not fall below the second threshold value, the process returns to step S15 to acquire the temperature data.
On the other hand, when it is determined that the differential value of the calculated temperature data is less than the second threshold value, the detection unit 14 detects the closing operation of the door (step S8) and ends the process.

According to the door open / close detection device according to the present embodiment, it is calculated by the acquisition unit that acquires the temperature data in the storage, the calculation unit that calculates the differential value of the temperature data acquired by the acquisition unit, and the calculation unit. It has a detection unit that detects the opening / closing operation of the door of the storage based on the differential value. According to such a configuration, a temperature detection means such as a thermometer provided for temperature control in the storage is utilized, and the temperature change per unit time in the storage calculated from the temperature data acquired from the thermometer. Since the opening / closing operation of the door is detected based on the differential value of the temperature data corresponding to, the opening / closing operation of the storage door can be detected with high accuracy without requiring special capital investment.

Further, according to the door open / close detection device according to the present embodiment, a threshold value is set for the differential value of the calculated temperature data, and when the determination unit determines that the differential value of the temperature data exceeds the first threshold value, it is detected. The part detects the opening operation of the door. Further, in the state where the door opening operation is detected, the detection unit detects the door closing operation when the determination unit determines that the differential value of the temperature data is below the second threshold value. According to such a configuration, for example, the temperature change in the refrigerator caused by the temperature control in the normal operation of the storage can be clearly distinguished from the temperature change due to the opening / closing operation of the door, so that the opening / closing operation of the door can be further performed. It can be detected with high accuracy.

The present invention is not limited to the above embodiment. In the above embodiment, the case where the information processing device 1 is realized by one computer has been illustrated, but the present invention is not limited to this, and the door open / close detection device is provided by a plurality of computers configured to be able to communicate with each other via a network. It may be realized.

1 ... Door open / close detection device, 2 ... Storage, 3 ... Thermometer, 4 ... Network, 5 ... Output device, 11 ... Acquisition unit, 12 ... Calculation unit, 13 ... Judgment unit, 14 ... Detection unit, 15 ... Output unit

Claims (4)

The acquisition unit that acquires the temperature data in the storage, and
A calculation unit that calculates the differential value of the temperature data acquired by the acquisition unit, and
A door open / close detection device, characterized in that it includes a detection unit that detects an opening / closing operation of the door of the storage based on a differential value calculated by the calculation unit. Further, a determination unit for determining whether or not the differential value exceeds the first threshold value is provided.
The door open / close detection device according to claim 1, wherein the detection unit detects the opening operation of the door when the determination unit determines that the differential value exceeds the first threshold value. .. The determination unit further determines whether or not the differential value has fallen below the second threshold value.
When the determination unit determines that the differential value exceeds the first threshold value and the determination unit determines that the differential value is below the second threshold value, the detection unit determines that the differential value is below the second threshold value. The door opening / closing detection device according to claim 1 or 2, wherein the closing operation of the door is detected. Computer,
The acquisition unit that acquires the temperature data in the storage, and
A calculation unit that calculates the differential value of the temperature data acquired by the acquisition unit, and
A program that functions as a detection unit that detects the opening / closing operation of the storage door based on the differential value calculated by the calculation unit.

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