KR20220104913A - Child detection system and method using ultrasonic sensor - Google Patents

Abstract

The present invention relates to a child detection system using an ultrasonic sensor and a method thereof. The child detection system comprises: an ultrasonic sensor unit installed at the entrance of a specific space to detect a preset area, and installed to detect an adult or a child on the basis of the height of a visitor; a control unit for analyzing a detection signal applied from the ultrasonic sensor unit, determining whether the visitor is an adult or child, and generating an alarm signal in case of the child; a buzzer unit for issuing alarm sound in accordance with the alarm signal applied from the control unit; and a wireless communication processing unit for wirelessly transmitting the alarm signal applied from the control unit to a portable terminal of a manager or guardian. Therefore, the entry of or access by a child can be effectively controlled.

Description

CHILD DETECTION SYSTEM AND METHOD USING ULTRASONIC SENSOR

The present invention relates to a system and method for detecting children using an ultrasonic sensor, and more particularly, by using the ultrasonic sensor to distinguish and warn children among entrants, effectively control the access or access of children to places where danger factors exist. It relates to a child detection system and method using an ultrasonic sensor that can do this.

The ultrasonic sensor generates ultrasonic waves having a frequency higher than an audible frequency by mechanical vibration of a piezoelectric ceramic element, or detects ultrasonic waves reflected from a reflector and converts them into electrical signals to provide information on the presence and location of objects.

Such ultrasonic sensors are widely used in various fields such as detection of moving objects and motion detection.

In Patent Document 1 (KR1020180104458 A1) (a device for detecting a moving object using an ultrasonic sensor, a method therefor, and an alarm system using the same), a configuration that distinguishes a moving object from a stationary object based on data obtained using an ultrasonic sensor There is no classification by size.

In Patent Document 2 (KR1020170014187 A1) (motion detection system for school vehicle), it is a configuration that detects a child or movement within a certain range of the vehicle using a plurality of detection sensors attached to the school vehicle, but only the child cannot be recognized. A cost burden may occur due to the use of multiple detection sensors.

Patent Document 3 (KR1020200024485 A1) (Child protection vehicle safety assistance device) has a configuration that monitors whether or not a passenger is in a vehicle in real time by a occupant sensor unit including an ultrasonic detection sensor, but does not distinguish and recognize only children. There may be a cost burden due to the use of the detection sensor.

In Patent Document 4 (KR20-0264933 B1) (Children's traffic accident prevention system using ultrasonic sensor), the ultrasonic sensor detects the entrance of a vehicle and notifies the surrounding children with voice, but only the vehicle is recognized and a warning sound is generated are doing

On the other hand, in Patent Document 5 (KR1020190123600 A1) (a method of counting occupants using an infrared sensor), the infrared sensor is installed at a first height and a second height from the floor of a specific space based on the user's height, respectively, and installed to a specific space In the case of the infrared sensor, which is sensitive to external light and sensitive to the external environment, there is a problem in that it is not possible to detect depending on the clothes worn.

US 102180104458 A1 US 1020170014187 A1 US 1020200024485 A1 US 20-0264933 B1 US 1020190123600 A1

Therefore, the present invention has been devised to solve the above problem, and by using an ultrasonic sensor to distinguish and warn children among visitors, an ultrasonic sensor that can effectively control children's entry or access to places where dangerous elements exist An object of the present invention is to provide a child detection system and method used.

Other objects and advantages of the present invention will be set forth below and will be learned by way of example of the present invention. Furthermore, the objects and advantages of the present invention may be realized by means and combinations indicated in the claims.

In order to achieve the above object, a child detection system using an ultrasonic sensor according to the present invention is installed at the entrance of a specific space to detect a preset area and detects entrants with ultrasonic waves, but based on the height of the entrants an ultrasonic sensor unit installed to detect an adult or a child; a control unit configured to analyze the detection signal applied from the ultrasonic sensor unit, determine whether the occupant is an adult or a child, and generate an alarm signal if the person is a child; a buzzer unit that sounds a warning sound according to an alarm signal applied from the control unit; and a wireless communication processing unit for wirelessly transmitting the alarm signal applied from the control unit to a portable terminal of an administrator or guardian, wherein the ultrasonic sensor unit is installed at a first height from the bottom surface of the entrance to detect a child a first ultrasonic sensor installed and a second ultrasonic sensor disposed at a second height vertically spaced apart from the first height and installed to detect an adult, wherein the control unit includes the first ultrasonic sensor and the second ultrasonic sensor 2 ultrasonic sensors are driven simultaneously, and when an occupant is detected by the first ultrasonic sensor and no entrant is detected by the second ultrasonic sensor, the occupant is determined as a child and the alarm signal is generated, and the buzzer unit generates the It is characterized in that a warning sound is sounded according to an alarm signal or the wireless communication processing unit is controlled to wirelessly transmit the alarm signal to a mobile terminal of an administrator or guardian.

In addition, in the method for detecting children using an ultrasonic sensor according to the present invention, the control unit is installed at the entrance of a specific space to detect a preset area to detect entrants with ultrasonic waves, and based on the height of the entrants, an adult or a child A first step of simultaneously operating both the first and second ultrasonic sensors of the ultrasonic sensor unit installed to detect; a second step of checking whether the control unit detects an entrant by the first and second ultrasonic sensors, respectively; a third step of, in the second step, when an occupant is detected by the first ultrasonic sensor and no entrant is detected by the second ultrasonic sensor, the control unit determines that the entrant is a child and generates an alarm signal; and a fourth step of controlling, by the control unit, so that the buzzer unit sounds a warning sound according to the warning signal or the wireless communication processing unit wirelessly transmits the warning signal to a portable terminal of an administrator or guardian do.

In addition, the first height is formed to a height set 4 to 6% lower than the average height of children aged 6 to 6.5, and the second height is formed to a height set to 4 to 6% lower than the average height of adults in their twenties. do.

In addition, the control unit further includes a load sensor installed on the floor to detect the load of the occupant, wherein the control unit detects the occupant only from the first ultrasonic sensor, and the load value sensed by the load sensor is a preset reference value It is characterized in that the control unit generates the warning signal in the following cases.

In addition, the specific space is a place where it is necessary to block children's access, and it is characterized in that it is any one of a kitchen space including a gas stove, a veranda space with a risk of falling, and a dangerous goods storage space for storing dangerous goods.

In addition, the first and second ultrasonic sensors are characterized in that it is possible to transmit and receive ultrasonic waves in a range of 40 kHz to 50 kHz.

As described above, according to the system and method for detecting children using an ultrasonic sensor according to the present invention, by using the ultrasonic sensor to distinguish and warn children among the entrants, the access or access of children to a dangerous place where dangerous elements exist is effectively controlled. There is an effect that can be done.

In addition, since the access or access of children to dangerous places can be automatically notified to the mobile terminal of the manager or guardian through wireless communication, there is an incidental effect that can prevent accidents due to exposure of children to risk factors in advance.

1 is a block diagram of a child detection system using an ultrasonic sensor according to the present invention;
2 is a view for explaining the installation and operation of the ultrasonic sensor according to the present invention,
3 is a flowchart illustrating a method for detecting a child using an ultrasonic sensor according to the present invention.

Hereinafter, embodiments will be described in detail with reference to the accompanying drawings. However, since various changes may be made to the embodiments, the scope of the patent application is not limited or limited by these embodiments. It should be understood that all modifications, equivalents and substitutes for the embodiments are included in the scope of the rights.

Terms used in the examples are used for the purpose of description only, and should not be construed as limiting. The singular expression includes the plural expression unless the context clearly dictates otherwise. In the present specification, terms such as “comprise” or “have” are intended to designate that a feature, number, step, operation, component, part, or combination thereof described in the specification exists, but one or more other features It should be understood that this does not preclude the existence or addition of numbers, steps, operations, components, parts, or combinations thereof.

Unless defined otherwise, all terms used herein, including technical or scientific terms, have the same meaning as commonly understood by one of ordinary skill in the art to which the embodiment belongs. Terms such as those defined in a commonly used dictionary should be interpreted as having a meaning consistent with the meaning in the context of the related art, and should not be interpreted in an ideal or excessively formal meaning unless explicitly defined in the present application. does not

In addition, in the description with reference to the accompanying drawings, the same components are assigned the same reference numerals regardless of the reference numerals, and the overlapping description thereof will be omitted. In the description of the embodiment, if it is determined that a detailed description of a related known technology may unnecessarily obscure the gist of the embodiment, the detailed description thereof will be omitted.

1 is a block diagram of a child detection system using an ultrasonic sensor according to the present invention.

Referring to FIG. 1 , a child detection system 100 using an ultrasonic sensor according to the present invention includes an ultrasonic sensor unit 110 including first and second ultrasonic sensors 112 and 114 , and a load sensor 130 . And, the control unit 120, the buzzer unit 140, and is configured to include a wireless communication processing unit (150).

The child detection system 100 using the ultrasonic sensor according to the present invention basically uses the ultrasonic sensor to distinguish and warn children among the entrants, so that the access or access of children to places where dangerous elements exist can be effectively controlled. is composed

Specifically, the ultrasonic sensor unit 110 is installed at the entrance of a specific space to detect a preset area to detect entrants using ultrasonic waves, but is installed to detect an adult or a child based on the height of the entrant.

The control unit 120 is a buzzer unit based on the output values of the first and second ultrasonic sensors 112 and 114 of the ultrasonic sensor unit 110 (which may include a load detection sensor 130 to be described later, if necessary). It is configured to control the operation of the 140 and the wireless communication processing unit 150 .

Preferably, the first and second ultrasonic sensors 112 and 114 can transmit and receive ultrasonic waves in a range of 40 kHz to 50 kHz, and in this case, the detection performance of the sensor for the human body can be improved.

In particular, the control unit 120 is configured to analyze the detection signal applied from the ultrasonic sensor unit 110, determine whether the entrant is an adult or a child, and generate an alarm signal if the child is a child.

The buzzer unit 140 notifies the outside of the entrance or approach of the child by sounding a warning sound according to the alarm signal applied from the control unit 120 .

The wireless communication processing unit 150 automatically wirelessly transmits the alarm signal applied from the control unit 120 to the mobile terminal 200 of the manager or guardian to prevent accidents due to exposure of children to risk factors through rapid action. help to prevent

The wireless communication processing unit 150 may include a wireless communication module (not shown) for transmitting and receiving signals to and from the portable terminal 200 . Here, various wireless communication modules may be used, and examples thereof include any one of Zigbee, RF, WiFi, 3G, 4G, LTE, LTE-A, and WiBro (Wireless Broadband Internet) or Other communication methods may be used.

2 is a view for explaining the installation and operation of the ultrasonic sensor according to the present invention.

Referring to FIG. 2 , the ultrasonic sensor unit 110 is installed at a first height L1 from the bottom surface of the entrance and exits vertically from the first ultrasonic sensor 112 and the first height L1 installed to detect a child. and a second ultrasonic sensor 114 disposed at a second height L2 spaced apart from each other and installed to detect an adult.

At this time, the first height (L1) is formed at a height set to 4 to 6%, preferably 5% lower than the average height of children aged 6 to 6.5, and the second height (L2) is the average height of adults in their twenties. It may be formed with a height set lower than that of 4 to 6%, preferably 5%.

In this case, by positioning the first and second ultrasonic sensors 112 and 114 at a height lower than the average height value of a child or an adult, there is an advantage in that it is possible to prevent poor detection of a child that may occur due to an error in the average height value. have.

In the present invention, based on statistical data or the Korean standard pediatric development table, the average height of children aged 6 to 6.5 is 1,150 to 1,170 mm, preferably 1,160 mm, and the average height of adults in their twenties is 1,590 to Although it is based on 1,610 mm, preferably 1,600 mm, it goes without saying that these standards of average elongation can be changed.

For example, the first height L1 may be formed to a height in the range of 1,090.4 to 1,113.6 mm, which is 4 to 6% lower than the average height of children when the average height of children aged 6 to 6.5 is 1,160 mm. have.

Also, for example, the second height L2 is formed to a height in the range of 1,504 to 1,536 mm, which is 4 to 6% lower than the average height of adults in their twenties when the average height of adults in their twenties is 1,600 mm. can be

Looking at the operation of the ultrasonic sensor unit 110, the control unit 120 operates both the first and second ultrasonic sensors 112, 114 at the same time. At this time, as will be described later, for example, if an entrant is detected by the first ultrasonic sensor 112 and an entrant is not detected by the second ultrasonic sensor 114 , the control unit 120 determines that the entrant is a child and provides an alarm signal. causes

In addition, in another embodiment, it may further include a load detection sensor 130 installed on the floor surface of the specific space to detect the load of the entrant. In this case, the load sensor 130 is preferably configured to detect the load of children among the entrants.

Here, for example, the control unit 120 may be configured to generate an alarm signal when an occupant is detected only by the first ultrasonic sensor 112 and the load value detected by the load detection sensor 130 is less than or equal to a preset reference value. .

In the present invention, a specific space is a place where it is necessary to block the access of children, but is not particularly limited, for example, a kitchen space including a gas stove, a veranda space with a risk of falling, and dangerous substances (eg, chemicals, knives, etc.) may be in any of the storage of dangerous goods.

3 is a flowchart illustrating a method for detecting a child using an ultrasonic sensor according to the present invention.

Referring to FIG. 3 , first, the control unit 120 operates both the first and second ultrasonic sensors 112 and 114 of the ultrasonic sensor unit 110 ( S100 ). At this time, it is preferable that the first and second ultrasonic sensors 112 and 114 operate both at the same time to enable detection even when an entrant passes quickly.

Next, it is checked whether the control unit 120 detects an occupant by the first and second ultrasonic sensors 112, respectively (S110 and S120).

For example, in steps S110 and S120, when an entrant is detected by the first ultrasonic sensor 112 (Y) and an entrant is not detected by the second ultrasonic sensor 114 (N), the control unit 120 controls the entrant is determined to be a child and generates an alarm signal (S130).

If necessary, the control unit 120 uses the load value detected by the load sensor 130 in addition to the first and second ultrasonic sensors 112 and 114 to generate an alarm signal when it is less than or equal to a preset reference value. You may.

Next, a warning sound can be sounded according to the alarm signal or the alarm signal can be wirelessly transmitted to the mobile terminal (S140), and the buzzer unit 140 sounds a warning sound according to the alarm signal applied from the control unit 120, thereby allowing children to enter and exit. However, the approach may be notified to the outside, and the wireless communication processing unit 150 may automatically wirelessly transmit an alarm signal applied from the control unit 120 to the mobile terminal 200 of the manager or guardian.

Those of ordinary skill in the art to which the present invention pertains will understand that the present invention may be embodied in other specific forms without changing the technical spirit or essential features thereof. Therefore, it should be understood that the embodiments described above are illustrative in all respects and not restrictive. The scope of the present invention is indicated by the claims described below rather than the above detailed description, and all changes or modifications derived from the meaning and scope of the claims and their equivalent concepts are included in the scope of the present invention. should be interpreted

110: ultrasonic sensor unit
112: first ultrasonic sensor
114: second ultrasonic sensor
120: control unit
130: load sensor
140: buzzer unit
150: wireless communication processing unit

Claims (10)

an ultrasonic sensor unit installed at the entrance of a specific space to detect a preset area to detect entrants with ultrasound, and installed to detect an adult or a child based on the height of the entrant;
a control unit configured to analyze the detection signal applied from the ultrasonic sensor unit, determine whether the entrant is an adult or a child, and generate an alarm signal if the person is a child;
a buzzer unit that sounds a warning sound according to an alarm signal applied from the control unit; and
and a wireless communication processing unit for wirelessly transmitting the alarm signal applied from the control unit to a mobile terminal of a manager or guardian,
The ultrasonic sensor unit is installed at a first height from the bottom surface of the entrance and a first ultrasonic sensor installed to detect a child and a second height spaced from the first height by a predetermined interval vertically to detect an adult Including a second ultrasonic sensor to be installed,
The control unit drives both the first ultrasonic sensor and the second ultrasonic sensor at the same time, and when an entrant is detected by the first ultrasonic sensor and no entrant is detected by the second ultrasonic sensor, the entrant is determined as a child and the A child using an ultrasonic sensor, characterized in that it generates an alarm signal, and controls the buzzer unit to sound a warning sound according to the warning signal or the wireless communication processing unit to wirelessly transmit the alarm signal to a mobile terminal of an administrator or guardian detection system. According to claim 1,
The first height is formed to a height set to 4 to 6% lower than the average height of children aged 6 to 6.5, and the second height is formed to a height set to be 4 to 6% lower than the average height of adults in their twenties. Child detection system using sensors. According to claim 1,
A load sensor for detecting the load of the entrant is installed on the bottom surface of the entrance,
The control unit is a child using an ultrasonic sensor, characterized in that when an occupant is detected only by the first ultrasonic sensor and the load value detected by the load detection sensor is less than or equal to a preset reference value, the control unit generates the warning signal detection system. According to claim 1,
The specific space is a place where it is necessary to block children's access, and child detection using an ultrasonic sensor, characterized in that it is any one of a kitchen space including a gas stove, a veranda space with a risk of falling, and a dangerous goods storage space for storing dangerous goods system. The method of claim 1,
The first and second ultrasonic sensors are a child detection system using an ultrasonic sensor, characterized in that it is possible to transmit and receive ultrasonic waves in a range of 40 kHz to 50 kHz. First and second ultrasonic sensors of the ultrasonic sensor unit installed so that the control unit is installed at the entrance of a specific space to detect a preset area and detects entrants using ultrasonic waves, and is installed to detect adults or children based on the height of the entrants. a first step of operating both at the same time;
a second step of checking whether the control unit detects an entrant by the first and second ultrasonic sensors, respectively;
a third step of, in the second step, determining the occupant as a child and generating an alarm signal when the entrant is detected by the first ultrasonic sensor and the entrant is not detected by the second ultrasonic sensor; and
and a fourth step of controlling, by the control unit, so that the buzzer unit sounds a warning sound according to the warning signal or the wireless communication processing unit wirelessly transmits the warning signal to a portable terminal of a manager or guardian A method of detecting children using an ultrasonic sensor. 7. The method of claim 6,
The first height is formed to a height set to 4 to 6% lower than the average height of children aged 6 to 6.5, and the second height is formed to a height set to be 4 to 6% lower than the average height of adults in their twenties. A method of detecting children using sensors. 7. The method of claim 6,
A load sensor for detecting the load of the entrant is installed on the bottom surface of the entrance,
The control unit further comprises a fifth step of causing the control unit to generate the warning signal when an occupant is detected only by the first ultrasonic sensor and the load value detected by the load detection sensor is less than or equal to a preset reference value. A method for detecting children using an ultrasonic sensor. 7. The method of claim 6,
The specific space is a place where it is necessary to block children's access, and child detection using an ultrasonic sensor, characterized in that it is any one of a kitchen space including a gas stove, a veranda space with a risk of falling, and a dangerous goods storage space for storing dangerous goods Way. 7. The method of claim 6,
The first and second ultrasonic sensors are a method of detecting a child using an ultrasonic sensor, characterized in that it is possible to transmit and receive ultrasonic waves in a range of 40 kHz to 50 kHz.

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