TWI578277B - Safety warning devices and methods - Google Patents

Description

Safety warning device and method

The present invention relates to a warning device, and more particularly to a safety warning device and method suitable for personnel safety monitoring.

With the advancement of automation technology, digital technology services have gradually entered the daily life of human beings, such as human-computer interaction operations, safety monitoring systems, etc., relying on high-quality personnel identification devices to make full efforts. Therefore, a safety warning device that accurately identifies the activity status of a specific person and sends a warning message in a timely manner is one of the main goals of the industry to seek a breakthrough.

In order to recognize the activity status of a specific person, a camera that can capture the image of the monitored target is often used to obtain the desired image, and then image recognition technology is used for identification. However, this method is not suitable for privacy venues, but is also subject to changes in environmental background factors such as lighting, so that the accuracy of identification is disturbed. In addition, the use of radio frequency identification (RFID) security warning device, although can take into account privacy, but because it can only detect the proximity of the target, it is difficult to achieve the purpose of identifying the monitored target activity state.

Therefore, the invention patent of the Republic of China No. I351507 proposes a topographic map detected by a plurality of ranging devices arranged in a two-dimensional array to identify the active type of the moving target so that the accuracy required for the identification can be achieved. And an activity identification device and method capable of taking into consideration the convenience and privacy requirements of the activity recognition device. However, due to the complicated system configuration, it is difficult to apply to various places except for the high installation cost.

In view of the above, an object of the present invention is to provide a safety warning device and method for collecting a majority of a predetermined range in a specific location by using a thermopile array sensor and a static and dynamic sensor installed in a specific place. Sensing the temperature value to analyze and judge the presence or absence of the target and its dynamic and static changes, and promptly issue warnings when the static and dynamic changes of the existing target are abnormal, so it can not only meet the convenience and privacy requirements, but also be very easy to build. Set.

To achieve the above and other objects, the present invention provides a safety alert device adapted to monitor the safety of a particular location. The safety alert device comprises a Thermopile sensor array, a Motion Detector and an analysis unit, wherein the thermopile array sensor is installed in a specific location to be monitored for collection. A plurality of sensed temperature values within a predetermined range of a particular location being monitored. The motion and static sensor is used to detect the dynamic change of a target system in the activity or in the static state, and the analysis unit is configured to analyze whether the target is monitored according to the sensed temperature value, and determine the target existence. When the target of the motion sensor detection is at rest for a long time, a warning signal is generated.

In an embodiment, the safety alert device further includes a communication and transmission unit disposed between the thermopile array sensor, the static and dynamic sensor, and the analysis unit, for transmitting the plurality of sensing temperature values and the target Change statically.

In an embodiment, the security alert device further includes an alerting unit for issuing a warning message of a text message, a voice message, a voice message, a vibration message, or a visible light message according to the warning signal generated by the analysis unit.

In an embodiment, the analysis unit of the safety alert device also analyzes, according to the sensed temperature values, the target existing in the monitored specific location is in a standing or lying state. To decide whether to generate a warning signal.

The present invention further provides a security alert method suitable for monitoring the security status of a particular location. The method comprises the steps of: detecting a dynamic change of a target system in a monitored specific location that is active or stationary; collecting a plurality of sensing temperature values within a predetermined range of the specific location; and sensing the temperature values according to those collected To analyze whether there is a target in the specific location; and to generate a warning signal when the target exists and the detected target is in a static state for a long time.

The safety warning method further includes the following steps: analyzing the target system to be in a standing or lying state according to the sensed temperature values obtained by detecting the target.

The state in which the monitored target is standing or lying is determined by detecting the variation (ΔT) av of the sensed temperature values obtained by the monitored target. The variation (ΔT)av of those sensed temperature values obtained by detecting the monitored target is calculated by the following formula:

Tav-based detection of the formula obtained by the monitoring target that the sensed temperature average value of x _i, N the total number of lines detected by x _i obtained from the monitoring target that the sensed temperature value.

Wherein, when the calculated variation amount (ΔT)av is less than a lying threshold value, it is determined that the monitored target system is in a state of lying down.

The determining, by the monitored specific location, whether there is a target includes: obtaining an average of a plurality of sensing temperature values of a background within a predetermined range of the monitored specific location; and sensing temperatures of at least one of the collected ones The value is greater than the average value of the background sensing temperature, and there is a threshold value, and when the situation continues for one threshold time, the monitored specific location is determined. There are already targets.

In summary, the safety warning device and method provided by the present invention can not only use the camera or the hardware device carried by the invention, but can also take into consideration the convenience and privacy requirements of the warning device, and the sense of the thermopile array. The detector and the static and dynamic sensor are easy to obtain and implement, and are very suitable for various occasions.

The above and other objects, features, and advantages of the present invention will become more apparent and understood.

10‧‧‧Safety warning device

11‧‧‧Thermal Array Array Sensor

12‧‧‧Communication collection unit

121‧‧‧Communication transmitter

122‧‧‧Communication receiver

13‧‧‧Analysis unit

14‧‧‧Warning unit

15‧‧‧Dynamic sensor

20‧‧‧ Target

201~220‧‧‧ Process steps

1 is a block diagram showing a safety alert device in accordance with a preferred embodiment of the present invention.

2 is a flow chart showing a method of a safety alert device in accordance with a preferred embodiment of the present invention.

Referring to FIG. 1, a block diagram of a security alert device in accordance with a preferred embodiment of the present invention is shown. As described above, since the safety alert device 10 does not need to install a camera in a specific place, it can achieve the purpose of monitoring the movement and change of the target 20 in a specific place and performing safety warning. Therefore, it is particularly suitable for a device such as a bedroom. Or a place where the bathroom space is highly valued.

As shown, the security alert device 10 includes a dynamic and static sensor 15, such as a thermopile array sensor 11 having an MxN array element, an analysis unit 13 such as a microcontroller, a computer or a mobile phone, configured to be statically The sensor 15 , the communication and transmission unit 12 between the thermopile array sensor 11 and the analysis unit 13 and the alarm unit 14 coupled to the analysis unit 13 , and the communication transmission unit 12 has a communication transmission device 121 and a communication receiving device 122.

The motion and static sensor 15 is configured to detect the dynamic change of the target 20 system in the monitored specific location during the active or stationary state, so as to be provided to the analyzing unit 13 to determine whether the dynamic change of the target 20 is abnormal. The thermopile array sensor 11 is installed, for example, at a position above the target 20 of the monitored specific location, so as to collect a plurality of sensed temperature values within a predetermined range of the monitored specific location, and borrow those sensed temperature values. The communication transmission unit 12, which uses the Internet technology or wireless communication technology such as WiFi, WiMAX, GSM/GPRS, 3G, 4G, etc., transmits to the analysis unit 13 at the other end. The analyzing unit 13 analyzes whether the target 20 exists in the monitored specific location according to the collected sensing temperature value, and generates a warning signal when the motion and static change of the target 20 is determined to be abnormal, so that the warning unit 14 can be analyzed according to the analysis. The warning signal generated by the unit 13 is used to issue a warning message such as a text message, a voice message, a voice message, a vibration message, and a visible light message.

In FIG. 1, the communication transmission unit 12 of the Internet technology or the wireless communication technology is used to transmit the sensing temperature value output by the thermopile array sensor 11 and the activity of the target 20 detected by the static and dynamic sensor 15. The reason for the quiescent state is that for the remote warning, for example, when the analysis unit 13 and the static and dynamic sensor 15 are not far away from the thermopile array sensor 11, the blue bud (Blue) can also be used. Tooth) or short-range communication technology such as infrared rays, or even the analysis unit 13 is directly connected to the thermopile array sensing via I ² C, RS232, universal serial bus (USB), input/output port or other bus bar, etc. The device 11 and the static and dynamic sensor 15 are omitted from the communication transmission unit 12 in the figure.

In general, the sensed temperature value output by the thermopile array sensor 11 within the effective sensing range is determined by the distance between the measured points of the monitored target 20 and the array elements of the thermopile array sensor 11. Change, and when the target 20 such as a person is present, the temperature value sensed Generally, the background sensing temperature value is higher than when the target 20 is not present. Therefore, the sensing temperature value collected by the thermopile array sensor 11 is used to determine whether the monitored specific location exists within a predetermined range. There is goal 20.

As shown in the following table, the sensing temperature value outputted by the array elements of the thermopile array sensor 11 within the effective sensing range is the sensing temperature value when the ambient temperature of the embodiment is 26 ° C:

In addition, since the sensing range of the thermopile array sensor 11 is limited by the field of view θ as shown, the relative position of the thermopile array sensor 11 to the target 20 is set. In the case of position, the size of the predetermined range of the monitored specific location and the distance between the thermopile array sensor 11 and the target 20 should be taken into consideration.

Please refer to FIG. 2, which is a flowchart of a method for a security alert device in accordance with a preferred embodiment of the present invention. In the figure, the security alert device 10 first establishes a predetermined range of background temperature data of the monitored specific location in step 201, that is, when there is no target within the predetermined range of the monitored specific location, the thermopile array sensor 11 is The background sensed temperature values of the output of each array element are recorded and the average temperature value TBav is calculated accordingly. Thereafter, the process proceeds to step 202 to detect the panoramic temperature data of the predetermined range of the monitored specific location.

In step 203, the safety alert device 10 determines whether there is a case where the sensed temperature value of the panoramic temperature data output by the thermopile array sensor 11 is greater than the average value TBav of the background sensed temperature, and there is a threshold value P. The predetermined number of sensing temperature values meets the foregoing In the case of a piece, there may be a target 20 within a predetermined range representing the monitored specific place, and the flow proceeds to step 205. Otherwise, the process proceeds to step 204 to clear the target presence flag of the security alert device 10 and stop and reset the timing of the Ta timer.

In step 205, when the target presence flag has been set, the flow proceeds to step 210. Otherwise, the process proceeds to step 206 to determine whether the Ta timer has been started. If not, the process proceeds to step 207 to start the Ta timer. Otherwise, the process proceeds to step 208 to determine whether the time of the Ta timer is not less than a presence threshold time Z, that is, there may be a target within a predetermined range of the monitored specific location. If the situation of 20 has continued for one time threshold Z, the process proceeds to step 209 to set a target presence flag, that is, at this time, the monitored specific place has been determined to have the target 20 indeed.

Next, the process proceeds to step 210 to separate the temperature data of the monitored target 20 for use in determining whether the monitored target 20 is in a standing or lying state, and accordingly determining whether to perform a safety alert. In step 211, in order to determine the state in which the monitored target 20 is in a standing or lying state by detecting the variation amount (ΔT) av of the sensed temperature value obtained by the monitored target 20, the sensing is calculated by the following equation. The variation of the temperature value (△T) av:

Wherein, the Tav detects the average of the sensed temperature values x _i obtained by the monitored target 20, and the N senses the total number of those sensed temperature values x _i obtained by the monitored target 20.

The variation of the sensing temperature value x _i (ΔT)av can also be selectively calculated by the following formula: Variance Var (x) or Standard Deviation (SD) the way:

Wherein, when the calculated variation amount (ΔT) av, Var(x) or S.D. is less than a lying threshold value R, it can be determined that the monitored target 20 is in a state of lying down.

Next, proceeding to step 212, it is determined whether the target 20 is active according to the motion and static sensor 15 detecting the motion change of the target 20 of the monitored specific location being active or stationary. If so, the flow proceeds to step 213 to clear the target stationary flag and stop and reset the timing of the Ts timer. Otherwise, the representative target is at rest, and the flow proceeds to step 214 to determine whether the target stationary flag has been set. If it has been set, it proceeds to step 219, otherwise it proceeds to step 215 to determine whether the Ts timer has been started. And when the Ts timer is not started, the process proceeds to step 216 to start it. Otherwise, the process proceeds to step 217 to determine whether the target 20 is in a stationary state for a certain threshold time X. If not, the flow directly proceeds to step 219. Then, the process proceeds to step 218 to set the target stationary flag, and then proceeds to step 219.

In step 219, the safety alert device 10 determines whether there is an abnormality and generates a warning signal according to the dynamic and static change analysis and the determination result of the target 20 in the monitored specific location. Wherein, when the safety alert device 10 is installed in the bathroom, the typical situation is that when the target stationary flag has been set, the target 20 representing the monitored specific site may be inactive for an excessively long period of time, so there is an entry. Step 220 is necessary to issue a warning message. Or, when the target stationary flag has been set and the safety alert device 10 determines that the monitored target 20 is in a state of lying down, the monitored target 20 has been lying still for a period of time, and a warning message is immediately issued to notify The personnel immediately rescued.

In addition, when the safety alert device 10 is installed in the bedroom to monitor the sleep behavior of the target 20, the typical condition is that when the target stationary flag is not set and the monitored target 20 is in a state of lying, it represents the monitored target 20 The system is in a normal sleep state. Also, when the target is still When the flag is not set and the monitored target 20 is in a non-recumbent state, it means that the monitored target 20 has been out of bed.

Moreover, when the security alert device 10 is installed in the entrance and exit to monitor the behavior mode of the target 20, the typical situation is that when the target stationary flag is not set and the monitored target 20 is in a standing state, the monitored target 20 is represented. There is an abnormal situation in which the door is too long, and there seems to be a warning to remind the monitoring personnel of further processing.

While the invention has been described above by way of a preferred embodiment, it is not intended to limit the invention, and it is intended to be within the scope of the invention. . Therefore, the scope of the invention is defined by the scope of the appended claims.

201~220‧‧‧ Process steps

Claims (10)

A safety warning device adapted to monitor a security situation of a specific location, comprising: a thermopile array sensor installed at the specific location for collecting a plurality of sensing temperature values within a predetermined range of the specific location; a motion sensor for detecting a change in motion of one of the target locations in the active or stationary state; and an analyzing unit for analyzing whether the target exists in the specific location according to the sensed temperature values And generating a warning signal when it is determined that the target exists and the static and dynamic sensor detects that the target is in a static state for a long time. The security warning device of claim 1, further comprising a communication transmission unit disposed between the thermopile array sensor, the dynamic static sensor and the analysis unit, for transmitting the Sensing the temperature value and the dynamic change of the target. The security alert device of claim 1 further includes a warning unit for issuing a warning message of a text message, a voice message, a voice message, a vibration message or a visible light message according to the warning signal. The security warning device of claim 1, wherein the analysis unit further analyzes, according to the sensed temperature values, the target system in the specific location to be in a standing or lying state to determine whether to generate The warning signal. A security alert method for monitoring the security status of a particular location, comprising the steps of: detecting a change in motion of one of the target locations in the active or stationary state; collecting a majority of the predetermined range of the particular location Measuring temperature value; And analyzing whether the target exists in the specific location according to the sensed temperature values; and generating a warning signal when the target exists and the detected target is in a static state for a long time. The security warning method of claim 5, further comprising the step of: analyzing the target to be in a standing or lying state according to the sensed temperature values obtained by detecting the target. For example, in the safety warning method described in claim 6, wherein the target is a standing or lying state by using the variation amount (ΔT) av of the sensed temperature values. For example, in the safety warning method described in claim 7, wherein the variation (ΔT)av of the sensing temperature values obtained by detecting the target is calculated by the following formula: Wherein, Tav-based detection of the sensed temperature of the target obtained from the average value of x _i, N-based detection of the sensed temperature of the target value obtained from the total number of x _i. For example, in the safety warning method described in claim 7, wherein when the variation amount (ΔT)av is less than a lying threshold, the target is judged to be in a state of lying. The security warning method of claim 5, wherein the step of determining whether the target exists in the specific location comprises: obtaining an average of a plurality of sensing temperature values of a background within the predetermined range of the specific location; When the collected at least one of the sensed temperature values is greater than the average of the background sensed temperatures, and there is a threshold value, and the situation continues for a threshold time, the target is determined to exist.