CN201829026U - System for monitoring and alarming fall - Google Patents

Abstract

A fall monitoring and alarm system includes an information collection and fusion module, a pressure collection module and an alarm module, the pressure collection module is connected to the information collection and fusion module, and the information collection and fusion module is connected to the alarm module. By fusing the information acquired by the three-axis accelerometer, the attitude sensor and the pressure acquisition module, the fall situation can be judged more comprehensively, the accuracy of judgment can be improved, and misjudgment can be reduced.

Description

Fall detection and alarm system

【Technical field】

The utility model relates to a monitoring device, in particular to a fall monitoring and alarm system.

【Background technique】

Accidental falls can happen in the life of the elderly or people with medical conditions. The bones of the elderly are relatively loose, and a simple fall may cause serious consequences, making them unable to save themselves; patients with coronary heart disease, cerebral infarction, cerebral hemorrhage and other diseases may fall into a coma. If the above people delay the timing of rescue, the consequences will be disastrous. When the above people have no accidents, they are the same as healthy people. It is impossible to be treated in the hospital for a long time. In addition, the pace of life in today's society is accelerating, and it is unrealistic for children or guardians to accompany them for a long time.

There are many ways to monitor falls, such as by analyzing the acceleration, the angle of inclination of the human body, or obtaining the state changes of certain devices (such as rotating devices).

The above-mentioned monitoring methods need to meet the conditions of falls more strictly to determine falls, and these conditions are often idealized, which are quite different from the actual conditions of falls, so the recognition rate is low, or it is easy to cause misjudgment due to the single recognition condition .

【Content of utility model】

In view of this, it is necessary to provide a fall monitoring and alarm system that monitors the fall state and gives an alarm.

A fall monitoring and alarm system, including an information collection and fusion module, a pressure collection module and an alarm module, the information collection and fusion module is a wearable sensor module, including at least one of a three-axis accelerometer and an attitude sensor, the pressure The collection module is connected with the information collection and fusion module, and the information collection and fusion module is connected with the alarm module.

Preferably, the pressure collection module is wirelessly connected to the information collection and fusion module.

Preferably, there are two pressure collection modules, which are used to collect plantar pressure respectively.

Preferably, the pressure acquisition module includes a pressure sensor, a processing unit and a wireless communication module connected in sequence, the pressure sensor transmits the acquired pressure signal to the processing unit, and after being processed by the processing unit, the wireless communication module transmits it to the information collection and fusion module.

Preferably, the information collection and fusion module includes a mixed signal processor, and the three-axis accelerometer, attitude sensor, and pressure collection module are all connected to the mixed signal processor.

Preferably, the alarm module includes more than one of a short message module, a telephone module and a sounder.

Preferably, an alarm suspension module is also included, and the alarm suspension module is connected with the information collection and fusion module.

By fusing the information acquired by the three-axis accelerometer, the attitude sensor and the pressure acquisition module, the fall situation can be judged more comprehensively, the accuracy of judgment can be improved, and misjudgment can be reduced.

【Description of drawings】

Fig. 1 is a fall monitoring and alarm system of an embodiment;

Fig. 2 is a structural diagram of the pressure acquisition module;

Figure 3 is a structural diagram of the alarm module.

【Detailed ways】

Further description will be made below in conjunction with the accompanying drawings.

A three-axis accelerometer 100 and an attitude sensor 200 , as shown in FIG. 1 , are a fall monitoring and alarm system of an embodiment. The system includes a pressure collection module 300 , an information collection and fusion module 400 and an alarm module 500 . The pressure collection module 300 is connected to the information collection and fusion module 400 , and the information collection and fusion module 400 is connected to the alarm module 500 . The information collection and fusion module 400 further includes a three-axis accelerometer 100 and an attitude sensor 200, which can collect acceleration data and body inclination data of the human body, and then according to the pressure data provided by the pressure collection module 300, the acceleration data, body inclination data and pressure The data is fused to obtain the fall status, and it is decided whether to call the police according to the fall status.

The fall monitoring and alarm system of this embodiment is a wearable device. The triaxial accelerometer 100 and the attitude sensor 200 are integrated in the information collection and fusion module 400, appearing in the form of a wearable sensor module. The pressure collection module 300 and information collection The fusion module 400 is worn on the human body separately. The three-axis accelerometer 100 can obtain the acceleration in the three directions of x, y, and z in space, and the attitude sensor 200 can provide the direction of its movement in real time. Generally speaking, in order to monitor the fall condition of the human body, the three-axis accelerometer 100 and the attitude sensor 200 should be installed on the parts of the human body that generally do not produce large movements, such as the neck, chest, abdomen, waist and other parts. In consideration of wearing habits, it is preferably located at the waist. The pressure collection module 300 is arranged on the sole of the foot, for example, it can be arranged on the bottom of a special shoe or on the insole.

Therefore the fall situation of the present embodiment mainly judges from three aspects: the one, body position state, what body position state reflects is what kind of relationship the body and the direction of gravity are in, namely refers to the deflection angle between the state plane of the body and the vertical direction, which can be Used to differentiate standing, back or side lying positions. Threshold judgment is mainly performed through the acceleration measured by the triaxial accelerometer 100 . How to distinguish people's bending, squatting and falling movements is a problem that must be considered in safety monitoring. In the process of bending or squatting, the average person will not have a great acceleration, but when a fall occurs, it is an uncontrollable dumping action, which is much shorter than the normal normal action time, and the corresponding motion acceleration is large. The difference between bending and squatting is that there is horizontal acceleration in the bending action, while the squatting action mainly has vertical acceleration. By detecting the acceleration of the body movement in real time through the micro accelerometer, the falling action can be well distinguished from the normal action. Use a three-axis accelerometer to monitor the current motion acceleration of the human body in the three coordinate directions of space. If one or more acceleration values are too large, it means that the behavior of the person changes sharply in this direction, and there may be a fall. Instead of bending over, squatting and other pseudo-falling actions.

The second is the body inclination, which mainly uses the body inclination data measured by the attitude sensor 200 to determine the threshold. When the body inclination is greater than a certain set threshold, it means that a fall is very likely to have occurred.

The third is the state of contact with the ground, which is a supplement to the posture state. Threshold judgment is mainly performed through the plantar pressure data measured by the pressure acquisition module 300 . When the plantar pressure is less than a certain pressure value, it indicates that there may be a fall state. It is easy to know that when a person falls without both feet on the ground, there is no stress. When a person walks normally, the two feet touch the ground alternately. If a shoe with a pressure sensor is designed, then there is always one shoe that bears the weight of the person’s body, which is reflected in the pressure sensor with a pressure value. After a fall, neither foot touches the ground nor the sensor. Pressure value, according to the pressure value, it can be distinguished whether the human body is in a falling state. The detection function of the pressure sensor is mainly used to make up for the large-scale movement judgment that the acceleration sensor may occur when people are doing sports. It means that the first two are misjudgments; at the same time, considering that when a person sits or stands, certain postures can cause the pressure sensor to have no readings for a long time or the readings are too small, the pressure sensor needs to be used in conjunction with the acceleration sensor.

The aforementioned information collection and fusion module 400 may also only include one of the three-axis accelerometer 100 and the attitude sensor 200 .

Preferably, the information collection and fusion module 400 is set in a wearing body, and the wearing body can be worn on a human body. The wearing body is preferably a waist belt or the like.

Since the pressure collection module 300 and the information collection and fusion module 400 are located in different parts of the human body, they are preferably connected to the information collection and fusion module 400 in a wireless manner. Of course, in other embodiments, wired connections may also be used. There are two pressure collection modules 300, which are respectively installed on the soles of both feet for collecting plantar pressure.

As shown in Figure 2, it is a structural diagram of the pressure acquisition module. The pressure acquisition module 300 includes a pressure sensor 310 , a processing unit 320 and a wireless communication module 330 connected in sequence. The pressure sensor 310 is in contact with the sole of the foot for stepping on to obtain a pressure signal. The processing unit 320 receives the pressure signal and processes it, and the wireless communication module 330 transmits the pressure signal to the information collection and fusion module 400 after processing.

The above-mentioned three-axis acceleration sensor 100 can choose a sensor with higher sensitivity, such as 4mg/LSB. The posture sensor 200 can be a three-axis magnetoresistive sensor, which can detect the direction of human body movement, or other sensors that can know the posture of the human body, such as a gyroscope. The pressure sensor 310 is a resistive sensor with a circular sheet shape, which can be conveniently embedded in the sole or insole.

The information collection and fusion module 400 also includes a mixed signal processor, which can process various signals. Such as the above-mentioned acceleration data, body inclination data and pressure data, the above-mentioned data can be fused and judged.

As shown in Figure 3, it is a structural diagram of the alarm module. The alarm module 500 includes more than one of a short message module 510 , a phone module 520 and a sounder 530 . The short message module 510 can send the preset short message to the predetermined recipient; the telephone module 520 dials the preset guardian's phone or emergency call; the sounder 530 makes a sound, which can attract the attention of people around. Horns, horns, etc.

Because in the course of use, the situation of misjudgment and fall still inevitably occurs, thereby the alarm will be sent out by mistake. Therefore, it is also necessary to further provide an alarm suspension module 600, which is connected with the information collection and fusion module 400, and prevents the alarm module 500 from reporting to the police according to the user's operation instructions, such as prompting the user to send a text message or make a call after 30 seconds. If the user does not fall or does not need assistance, he can choose to stop sending text messages or make calls. The sounder 530 can also adopt a similar reminder method, or it can make a sound immediately when it is judged that it has fallen, and the user can turn off the sound in the process. The alarm termination module 600 can simply be a switch, a switch circuit or a single-chip microcomputer with instruction operation.

In addition, for the convenience of portability, the systems in this embodiment are powered by dry batteries or accumulators.

The above-mentioned embodiments only express several implementations of the utility model, and the description thereof is relatively specific and detailed, but it should not be construed as limiting the patent scope of the utility model. It should be noted that those skilled in the art can make several modifications and improvements without departing from the concept of the present invention, and these all belong to the protection scope of the present invention. Therefore, the scope of protection of the utility model patent should be based on the appended claims.

Claims (7)

1. A fall monitoring and alarm system, characterized in that it comprises an information collection and fusion module, a pressure collection module and an alarm module, and the information collection and fusion module is a wearable sensor module, comprising at least one of a triaxial accelerometer and an attitude sensor One, the pressure collection module is connected to the information collection and fusion module, and the information collection and fusion module is connected to the alarm module. 2 . The fall monitoring and alarm system according to claim 1 , wherein the pressure collection module is connected to the information collection and fusion module in a wireless manner. 3 . 3. The fall monitoring and alarm system according to claim 2, characterized in that there are two pressure acquisition modules, which are used to acquire plantar pressure respectively. 4. The fall monitoring and alarm system according to claim 3, wherein the pressure acquisition module includes a pressure sensor, a processing unit and a wireless communication module connected in sequence, and the pressure sensor transmits the obtained pressure signal to the processing unit, After being processed by the processing unit, the wireless communication module transmits it to the information collection and fusion module. 5. fall monitoring and warning system as claimed in claim 1, is characterized in that, described information collection fusion module comprises mixed signal processor, and described triaxial accelerometer, attitude sensor, pressure acquisition module are all combined with mixed signal processor connect. 6. The fall monitoring and alarm system according to claim 1, wherein the alarm module includes more than one of a short message module, a telephone module and a sounder. 7. The fall monitoring and alarm system according to claim 1, further comprising an alarm suspension module connected to the information collection and fusion module.

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