Anti-falling posture sensing system based on thermoelectric device power supply
By using thermoelectric devices and supercapacitors in the anti-fall attitude sensing system, real-time shaking monitoring and early warning of high-rise buildings without external power supply is achieved, which solves the problems of high maintenance costs and equipment failure risks in traditional methods, and improves the independence and long-term operation capabilities of the system.
Patent Information
- Application Number
- CN202411933374.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2024-12-26
- Publication Date
- 2025-04-08
AI Technical Summary
The prior art is difficult to achieve real-time shaking monitoring and early warning of high-rise buildings such as window glass and billboards, and traditional methods that rely on external power supplies or frequent battery replacements increase maintenance costs and risk of equipment failure.
The anti-fall attitude sensing system powered by thermoelectric devices is adopted. The system includes thermoelectric devices, supercapacitors, attitude sensors, signal collectors and early warning devices. The ambient thermal energy is converted into electrical energy through thermoelectric devices, stored in supercapacitors, and power is provided for the sensing module through a booster to realize the detection and early warning of objects without external power.
It realizes real-time monitoring of object shaking and timely warning of potential fall risks without external power supply or frequent battery replacement, which improves the independence and long-term operation capabilities of the system and reduces maintenance costs.
Smart Images
Figure CN119785545A_ABST
Abstract
Description
Technical Field
[0001] The present application relates to the field of posture sensing systems, and in particular to a fall prevention posture sensing system powered by a thermoelectric device. Background Art
[0002] With the acceleration of urbanization, the number of high-rise buildings has increased significantly, especially the widespread use of glass curtain walls in modern buildings, which has brought new challenges to safety management. Factors such as glass aging, climate change, and wind impact may cause it to move, loosen, or even fall. A large number of billboards and signs in cities are installed at high altitudes and are exposed to bad weather, wind, vibration, and other environments for a long time, which are prone to aging or structural fatigue, resulting in falling accidents.
[0003] In the existing technology, traditional safety management methods rely on regular manual inspection and maintenance, which is not only time-consuming and labor-intensive, but also difficult to achieve real-time monitoring. Potential problems are often not discovered in time, which easily leads to safety accidents. The fall of window glass or billboards is usually sudden, caused by environmental changes, aging and other factors, and it is difficult to prevent it in time by manual or static monitoring methods.
[0004] The sway monitoring and alarm modules of objects such as window glass and billboards usually rely on external power or battery power. However, frequent battery replacement or reliance on external power not only increases maintenance costs, but may also cause the device to not work properly when power is interrupted or the battery is exhausted. Therefore, it is urgent to develop a self-powered attitude sensing system that can monitor in real time and work stably for a long time without frequent maintenance. Summary of the invention
[0005] The present application proposes an anti-fall posture sensing system powered by a thermoelectric device, which can detect the shaking of an object and prevent the object from falling without an external power supply.
[0006] A fall prevention posture sensing system based on thermoelectric device power supply includes a power module, a sensor module, a signal acquisition module and a signal transmission module which are connected; wherein: The power module includes a thermoelectric device and a supercapacitor, wherein the supercapacitor can store the electric energy generated by the thermoelectric device and provide power to the sensor module, the signal acquisition module and the signal transmission module; The sensing module includes a posture sensor for real-time monitoring of the shaking of the object and generating a corresponding shaking signal; The signal acquisition module includes a signal collector, which is used to collect and analyze the shaking signal; The signal transmission module includes a signal transmission submodule and an alarm. The signal transmission submodule is used to transmit the shaking signal to the alarm. When the shaking signal exceeds an alarm safety threshold, the alarm triggers an alarm function.
[0007] As an optional embodiment, the power module also includes a booster, which is used to convert the low input voltage generated by the thermoelectric device and stored in the supercapacitor into a high output voltage before the supercapacitor provides power to the sensor module, the signal acquisition module and the signal transmission module.
[0008] As an optional implementation, the booster is a BQ25504 or LTC3108 booster.
[0009] As an optional embodiment, the thermoelectric device includes a substrate, an n-type thermoelectric arm, a p-type thermoelectric arm and an electrode; one end of the electrode is connected to the n-type thermoelectric arm; the other end of the electrode is connected to the p-type thermoelectric arm; multiple thermoelectric arms are connected in sequence to form a series conductive path; the thermoelectric arm generates electrical energy using temperature difference.
[0010] As an optional implementation, the attitude sensor determines and generates a shaking signal of the object by measuring the angular velocity change of the object on the XYZ axis.
[0011] As an optional implementation, the shaking signal includes a shaking angle and a shaking frequency.
[0012] As an optional implementation, the signal acquisition module acquires and analyzes the shaking signal in a manner including a real-time monitoring method for object shaking, and the real-time monitoring method for object shaking includes interval monitoring and continuous monitoring; wherein: When the shaking signal does not exceed the shaking safety threshold, the posture sensor detects the shaking of the object at a preset time interval and generates a corresponding shaking signal; When the shaking signal is between the shaking safety threshold and the alarm safety threshold, the posture sensor continuously detects the shaking of the object and generates a corresponding shaking signal; When the shaking signal exceeds the alarm safety threshold, the early warning device triggers the alarm function.
[0013] As an optional implementation manner, the shaking safety threshold includes a shaking angle safety threshold and a shaking frequency safety threshold; and / or The alarm safety threshold includes an alarm angle safety threshold and an alarm frequency safety threshold.
[0014] As an optional implementation, the power module and the sensor module work alternately and intermittently.
[0015] As an optional implementation, the signal transmission submodule is low-power Bluetooth or WiFi.
[0016] This application has at least the following beneficial effects: This application converts ambient thermal energy into electrical energy through thermoelectric devices, thereby achieving self-powered function, without the need for external power supply or frequent battery replacement, greatly improving the independence and long-term operation capability of the system; this application also integrates attitude sensors, signal collectors and early warning devices, etc., which can monitor the shaking state of objects (such as window glass, billboards, etc.) in real time. When the shaking is detected to exceed the preset threshold, an alarm is triggered to timely warn of potential falling risks. BRIEF DESCRIPTION OF THE DRAWINGS
[0017] Figure 1 A schematic structural diagram of a fall prevention posture sensing system powered by a thermoelectric device in one embodiment of the present application is shown.
[0018] Figure 2 A schematic diagram of the structure of a thermoelectric device in an embodiment of the present application is shown.
[0019] Figure 3 A schematic diagram of the operation of a thermoelectric device in an embodiment of the present application is shown.
[0020] Figure 4 A schematic diagram showing the connection of various components in an embodiment of the present application is shown.
[0021] Figure 5 A working state diagram showing the alternating and intermittent working of the power module and the sensor module in one embodiment of the present application is shown.
[0022] Figure 6 A schematic diagram of the operation of a fall prevention posture sensing system powered by a thermoelectric device in one embodiment of the present application is shown. DETAILED DESCRIPTION
[0023] The following will be combined with the drawings in the embodiments of the present application to clearly and completely describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, not all of the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative work are within the scope of protection of this application.
[0024] Thermoelectric devices work based on the Seebeck effect, which generates an electromotive force in a circuit when there is a temperature difference between the two ends of the device. By converting this effect into electrical energy, thermoelectric devices can power low-power devices. This power supply method uses waste heat or natural temperature differences in the environment, such as the temperature gradient on the surface of industrial equipment, automobile exhaust systems, or the human body. This allows the sensor to operate without an external power supply or battery, thereby improving the system's independence and long-term operation capabilities.
[0025] In IoT devices, self-powered sensors, and embedded systems, thermoelectric devices provide an effective energy solution for sensors, especially in remote areas or in scenarios where frequent battery replacement is inconvenient, such as environmental monitoring, structural health monitoring, and industrial process control. With the development of new materials and the application of nanotechnology, the efficiency of thermoelectric devices is expected to increase, further enhancing their potential for application in sensor power supply. In the future, it may also be integrated with other energy harvesting technologies to form a more efficient and reliable self-powered system.
[0026] In view of this, if Figure 1-Figure 4 As shown, the present application provides an anti-fall posture sensing system powered by a thermoelectric device, comprising a power module, a sensor module, a signal acquisition module and a signal transmission module that are connected; wherein: the power module comprises a thermoelectric device and a supercapacitor, and the supercapacitor can store the electric energy generated by the thermoelectric device and provide power to the sensor module, the signal acquisition module and the signal transmission module; The sensing module includes a posture sensor for real-time monitoring of the shaking of the object and generating a corresponding shaking signal; The signal acquisition module includes a signal collector, which is used to collect and analyze the shaking signal; The signal transmission module includes a signal transmission submodule and an alarm. The signal transmission submodule is used to transmit the shaking signal to the alarm. When the shaking signal exceeds an alarm safety threshold, the alarm triggers an alarm function.
[0027] This application uses thermoelectric devices to convert thermal energy in the environment into electrical energy, uses supercapacitors to store energy, and then uses a booster to provide a stable power supply for the sensor module, signal acquisition module and signal transmission module. It also integrates a posture sensor, a signal collector and an early warning device, etc., which can monitor the shaking state of objects (such as window glass, billboards, etc.) in real time. When it is detected that the shaking exceeds a preset threshold, an alarm is triggered to timely warn of potential falling risks.
[0028] Please continue reading Figure 1 and Figure 4In one embodiment of the present application, the power module also includes a booster, which is used to convert the low input voltage generated by the thermoelectric device and stored in the supercapacitor into a high output voltage before the supercapacitor provides power to the sensor module, the signal acquisition module and the signal transmission module.
[0029] Specifically, the booster is a booster of the BQ25504 or LTC3108 model, which has the function of converting the low input voltage generated by the thermoelectric device into a higher output voltage.
[0030] Please continue reading Figure 3 Thermoelectric devices efficiently convert the heat energy in the environment (temperature difference between indoor and outdoor or solar radiation) into electrical energy, providing a reliable source of electricity. The generated electrical energy is first stored in a supercapacitor. This energy storage device has the characteristics of fast charging and discharging, ensuring that the system responds to changes and provides the required energy in a short time. Subsequently, the booster increases the stored electrical energy to a voltage level suitable for the operation of each module, ensuring that the sensor module, signal acquisition module and signal transmission module have a stable power supply. The supercapacitor can store the electrical energy generated by the thermoelectric device and quickly release the energy when the subsequent module needs electrical energy.
[0031] Please continue reading Figure 2 In one embodiment of the present application, the thermoelectric device comprises a substrate, an n-type thermoelectric arm, a p-type thermoelectric arm and an electrode; one end of the electrode is connected to the n-type thermoelectric arm; the other end of the electrode is connected to the p-type thermoelectric arm; a plurality of the thermoelectric arms are sequentially connected to form a series conductive path; the thermoelectric arm utilizes a temperature difference △ T generates electrical energy; multiple pairs of n-type and p-type thermoelectric arms form the thermoelectric device, which only needs to be placed on an anti-falling object and does not need to be arranged in a specific position, thereby improving the flexibility of use of the thermoelectric device.
[0032] For details, please continue to refer to Figure 4 In this application, the connection methods between the components include using flexible wires or cables, using PCB board integration, and using low-power Bluetooth / WiFi.
[0033] like Figure 5 As shown, in one embodiment of the present application, the power module and the sensor module work alternately and intermittently, which can effectively reduce power consumption and continuous load of the module, and can also adjust the working cycle according to actual needs, so as to better adapt to different application scenarios and environmental conditions.
[0034] Please continue reading Figure 5, the control logic of the alternating intermittent operation of the power module and the sensor module: the thermoelectric device in the power module charges the supercapacitor, and when the output voltage of the boost module reaches the starting voltage of the sensor module (for example, 3.3V), the power module starts to discharge for the sensor module to work. When the voltage drops to the initial low voltage value (that is, the low voltage value generated by the thermoelectric device, such as 0.8V), the sensor module stops working, and the power module starts charging again to start the next working cycle. How long after the power module works does the sensor module start working? The size of the temperature difference causes the thermoelectric device to generate electrical energy.
[0035] It should be noted that alternating intermittent operation is the working mode between the power module and the sensor module, while interval monitoring and continuous monitoring are carried out on the posture sensor in the sensor module. That is to say, interval monitoring and continuous monitoring are implemented when the sensor module is in the operating state of alternating intermittent operation, and when the sensor module is in the dormant state of alternating intermittent operation (the power module is in the charging state), the sensor module does not implement interval monitoring and continuous monitoring.
[0036] like Figure 6 As shown, in one embodiment of the present application, the attitude sensor determines and generates a shake signal of the object by measuring the angular velocity change of the object on the XYZ axis, and the shake signal includes a shake angle and a shake frequency.
[0037] Specifically, the attitude sensor is a high-performance three-dimensional motion attitude measurement system based on MEMS technology, which includes motion sensors such as a three-axis gyroscope, a three-axis accelerometer, and a three-axis electronic compass. The attitude sensor is responsible for real-time monitoring of the shaking of objects such as window glass and billboards. The sensor detects the tilt and shaking of the object through built-in sensitive elements. The tilt is characterized by the shaking angle as a parameter, and the shaking is characterized by the shaking frequency as a parameter, and these signals are transmitted to the signal collector.
[0038] In one embodiment of the present application, the signal collector is capable of collecting and processing and analyzing the object shaking signal, including: when the monitored shaking signal is lower than the preset shaking threshold, the signal is monitored in an intermittent manner to reduce energy consumption; and once the monitored shaking signal exceeds the set threshold (such as the shaking angle is greater than 10° or the shaking frequency exceeds 15Hz), it will immediately switch to the continuous monitoring mode to ensure that no potential danger signals are missed.
[0039] Among them, the signal collector monitors the object shaking in real time in two ways: interval monitoring and continuous monitoring; the basis for selecting interval monitoring or continuous monitoring comes from the shaking safety threshold and the alarm safety threshold, corresponding to the classification of shaking signals. In this application, the shaking safety threshold includes the shaking angle safety threshold, such as 8° and the shaking frequency safety threshold, such as 13Hz; the alarm safety threshold includes the alarm angle safety threshold, such as 10° and the alarm frequency safety threshold, such as 15Hz.
[0040] Wherein: when the shaking signal does not exceed the shaking safety threshold, the posture sensor detects the shaking of the object at a preset interval and generates a corresponding shaking signal; When the shaking signal is between the shaking safety threshold and the alarm safety threshold, the posture sensor continuously detects the shaking of the object and generates a corresponding shaking signal; When the shaking signal exceeds the alarm safety threshold, the early warning device triggers the alarm function.
[0041] Further, when the shaking angle does not exceed the shaking angle safety threshold and the shaking frequency does not exceed the shaking frequency safety threshold, the posture sensor detects the shaking of the object at a preset time interval and generates a corresponding shaking signal; When the shaking angle is between the shaking angle safety threshold and the alarm angle safety threshold, or the shaking frequency is between the shaking frequency safety threshold and the alarm frequency safety threshold, the posture sensor continuously detects the shaking of the object and generates a corresponding shaking signal; when the shaking angle exceeds the alarm angle safety threshold, or the shaking frequency exceeds the alarm frequency safety threshold, the early warning device triggers the alarm function.
[0042] If there is a shaking signal that satisfies the scene that the attitude sensor continuously detects the shaking of the object and generates the corresponding shaking signal, and satisfies the alarm function of the early warning device, the early warning device will give priority to triggering the alarm function. In order to prevent the object from falling, in this application, the priority of continuous monitoring is higher than the priority of interval monitoring, and the priority of triggering the alarm is higher than the priority of continuous monitoring. When the monitored shaking signal is lower than the preset shaking threshold, the system monitors the signal in an interval manner to reduce energy consumption; and once the shaking signal is monitored to exceed the set threshold (such as the shaking angle is greater than 10° or the shaking frequency exceeds 15Hz), the system will immediately switch to the continuous monitoring mode to ensure that no potential danger signals are missed. When the shaking signal of the object exceeds the safety preset value, the signal collector quickly transmits the relevant data to the early warning device through the low-power Bluetooth / WiFi module to trigger the alarm function. The early warning device can promptly notify relevant personnel through sound and light alarms to ensure that relevant personnel can take measures quickly to avoid possible losses and safety hazards.
[0043] Specifically, the present application adopts an interval manner for signal monitoring in order to reduce the overall energy consumption. That is, in the interval state, the sensor module, the signal acquisition module, and the signal transmission module are all in a non-working state to reduce the overall energy consumption.
[0044] In one embodiment of the present application, the signal transmission submodule transmits the shaking signal to the warning device by other communication connection methods such as low-power Bluetooth or WiFi.
[0045] like Figure 6 As shown in the figure, when the shaking signal of the object exceeds the alarm safety threshold, the signal collector quickly transmits the relevant data to the early warning device through the low-power Bluetooth / WiFi module, triggering the alarm function. Among them, the early warning device can promptly notify relevant personnel through sound and light alarms, ensuring that relevant personnel can take measures quickly to avoid possible losses and safety hazards.
[0046] Here, this method can balance energy utilization efficiency and monitoring effect, and achieve efficient energy utilization and self-sustaining operation through alternating intermittent operation of the power module and the sensor module. The thermoelectric device uses the temperature difference to charge the supercapacitor. When the starting voltage of the sensor module is reached, it automatically switches to the monitoring mode. This dynamic adjustment mechanism not only ensures the long-term stable operation of the system, but also can adaptively adjust the working cycle according to the ambient temperature difference. When the sensor module is in operation, the system flexibly implements interval monitoring and continuous monitoring, further optimizing energy use. Monitoring is suspended in the dormant state to avoid unnecessary energy consumption. In addition, this intelligent working strategy significantly improves the energy utilization efficiency and monitoring accuracy of the system, enabling it to maintain efficient operation under various environmental conditions.
[0047] It should also be understood that the terms used in this disclosure are only for the purpose of describing specific embodiments and are not intended to limit the disclosure. As used in this disclosure and claims, the singular forms of "a", "an", and "the" are intended to include the plural forms unless the context clearly indicates otherwise. It should also be further understood that the term "and / or" used in this disclosure and claims refers to any combination of one or more of the associated listed items and all possible combinations, including these combinations.
[0048] Any process or method description in a flowchart or otherwise described herein may be understood to represent a module, segment or portion of code that includes one or more executable instructions for implementing the steps of a specific logical function or process, and the scope of the preferred embodiments of the present application includes alternative implementations in which functions may not be performed in the order shown or discussed, including performing functions in a substantially simultaneous manner or in the reverse order depending on the functions involved, which should be understood by technicians in the technical field to which the embodiments of the present application belong.
[0049] Those of ordinary skill in the art will appreciate that the units and algorithm steps of each example described in conjunction with the embodiments disclosed herein can be implemented in electronic hardware, computer software, or a combination of the two. In order to clearly illustrate the interchangeability of hardware and software, the composition and steps of each example have been generally described in terms of function in the above description. Whether these functions are performed in hardware or software depends on the specific application and design constraints of the technical solution. Professional and technical personnel can use different methods to implement the described functions for each specific application, but such implementation should not be considered to be beyond the scope of this application.
[0050] The above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.
Claims
1. A fall prevention posture sensing system based on thermoelectric device power supply, characterized in that: It includes a power supply module, a sensor module, a signal acquisition module and a signal transmission module which are connected to each other; wherein: The power module includes a thermoelectric device and a supercapacitor, wherein the supercapacitor can store the electric energy generated by the thermoelectric device and provide power to the sensor module, the signal acquisition module and the signal transmission module; The sensor module is used to monitor the shaking of the object in real time and generate corresponding shaking signals; The signal acquisition module is used to collect and analyze the shaking signal; The signal transmission module includes a signal transmission submodule and an alarm. The signal transmission submodule is used to transmit the collected shaking signal to the alarm. When the shaking signal exceeds the alarm safety threshold, the alarm triggers an alarm function.
2. The anti-fall posture sensing system based on thermoelectric device power supply according to claim 1 is characterized in that: The power module also includes a booster, which is used to convert the low input voltage generated by the thermoelectric device and stored in the supercapacitor into a high output voltage before the supercapacitor provides power to the sensor module, the signal acquisition module and the signal transmission module.
3. The anti-fall posture sensing system based on thermoelectric device power supply according to claim 1 is characterized in that: The power module and the sensor module work alternately and intermittently. When the output voltage of the power module reaches the starting voltage of the sensor module, the power module starts to discharge to supply the sensor module for operation. When the voltage drops to the initial low voltage value, the sensor module stops working.
4. The anti-fall posture sensing system based on thermoelectric device power supply according to any one of claims 1 to 3, characterized in that: The thermoelectric device includes a substrate, an n-type thermoelectric arm, a p-type thermoelectric arm and an electrode; one end of the electrode is connected to the n-type thermoelectric arm; the other end of the electrode is connected to the p-type thermoelectric arm; a plurality of the thermoelectric arms are sequentially connected to form a series conductive path; the thermoelectric arm generates electrical energy using temperature difference.
5. The anti-fall posture sensing system based on thermoelectric device power supply according to claim 1, characterized in that: The sensing module includes a posture sensor, and the posture sensor determines and generates a shaking signal of the object by measuring the angular velocity change of the object on the XYZ axis.
6. The anti-fall posture sensing system based on thermoelectric device power supply according to claim 5, characterized in that: The shaking signal includes a shaking angle and a shaking frequency.
7. The anti-fall posture sensing system based on thermoelectric device power supply according to claim 6 is characterized in that: The signal acquisition module acquires and analyzes the shaking signal in a manner including a real-time monitoring method of object shaking, and the real-time monitoring method of object shaking includes interval monitoring and continuous monitoring; wherein: When the shaking signal does not exceed the shaking safety threshold, the posture sensor detects the shaking of the object at a preset time interval and generates a corresponding shaking signal; When the shaking signal is between the shaking safety threshold and the alarm safety threshold, the posture sensor continuously detects the shaking of the object and generates a corresponding shaking signal; When the shaking signal exceeds the safety threshold, the early warning device triggers the alarm function.
8. The anti-fall posture sensing system based on thermoelectric device power supply according to claim 7 is characterized in that: The shaking safety threshold includes a shaking angle safety threshold and a shaking frequency safety threshold; and / or The alarm safety threshold includes an alarm angle safety threshold and an alarm frequency safety threshold.
9. The anti-fall posture sensing system based on thermoelectric device power supply according to claim 1, characterized in that: The sensing module performs signal monitoring in an interval manner, and in the interval state, the signal acquisition module and the signal transmission module are both in an inoperative state.
10. The anti-fall posture sensing system based on thermoelectric device power supply according to claim 1, characterized in that: The sensing module performs monitoring when the sensing module is in an operating state in the alternating intermittent operation, and does not perform monitoring when the sensing module is in a dormant state in the alternating intermittent operation.