Overtime self-turn-off circuit, wireless sensing detection system and method
Through the timeout self-shutdown circuit and low-frequency wake-up module combined with high-frequency communication, the problems of short communication distance, small data volume, low security, high power consumption and poor real-time performance in wireless sensing technology are solved, and wireless sensing detection with low power consumption, long distance and high real-time performance are achieved.
Patent Information
- Application Number
- CN202510383706.9
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-28
- Publication Date
- 2025-07-11
AI Technical Summary
The existing wireless sensing technology has problems such as short communication distance, small data transmission, low security, high power consumption and poor real-time performance.
The timeout self-shutdown circuit is adopted, combined with the low-frequency wake-up module and the high-frequency communication module, and the low-frequency signal wake-up system and control the timeout self-shutdown circuit to output a high level, realizing a low-power working mode, combining low-frequency wake-up and high-frequency communication, and automatically switch to a low-power state to reduce device power consumption.
It realizes low power consumption, long-distance data transmission and high real-time performance, and is suitable for wireless transmission requirements in large scenarios. The system automatically switches to low-power mode when signal-free detection, reducing device power consumption, and a simple structure that can be designed in a miniaturized manner.
Smart Images
Figure CN120301407A_ABST
Abstract
Description
Technical Field
[0001] The present invention relates to the field of wireless communication, and in particular, to a timeout self-shutdown circuit, a wireless sensing detection system and a method. Background Art
[0002] Wireless communication technology is widely used in sensor data acquisition. As the core device of the sensing layer, the sensor is a bridge connecting the real world and circuit signals, and has wide applications in various fields such as industry, automotive electronics, consumer electronics, and aerospace.
[0003] However, the existing wireless sensing technologies have problems such as short communication distance, small data transmission volume, low security, high power consumption and poor real-time performance. Summary of the Invention
[0004] In view of the above problems existing in the prior art, the present invention provides a timeout self-shutdown circuit, a wireless sensing detection system and a method, which mainly solve the problems of short communication distance, small data transmission volume, low security, high power consumption and poor real-time performance in the prior art.
[0005] In order to achieve the above and other objects, the technical solutions adopted by the present invention are as follows.
[0006] The present application provides a timeout self-shutdown circuit, including:
[0007] A level transfer branch, which connects the input end and the output end;
[0008] A charging delay branch, which gradually raises the output level through a charging unit when the input end is at a high level;
[0009] A switching device, whose control end is connected to the output level, and when the output level reaches the opening threshold, pulls down the output end level.
[0010] In an embodiment of the present application, the charging delay branch includes a first resistor, a first diode, a second resistor and a first capacitor. One end of the first resistor is connected to the negative electrode of the first diode and is connected to the input end; the other end of the first resistor is connected to the positive electrode of the first diode and is connected to the control end of the switching device; one end of the second resistor is connected to one end of the first capacitor and is connected to the control end; the other end of the second resistor is connected to the other end of the first capacitor and is grounded.
[0011] In an embodiment of the present application, the level transfer branch includes a third resistor.
[0012] In an embodiment of the present application, the switching device includes a transistor, the gate of the transistor serves as the control end, the source is grounded, and the drain is connected to the output end.
[0013] The present application also provides a wireless sensing detection system, including: the aforementioned timeout self-shutdown circuit, low-frequency wake-up module, power supply module, switch circuit, controller, sensing detection module, and high-frequency communication module; wherein, the power supply module powers the low-frequency wake-up module; when the low-frequency wake-up module detects a low-frequency signal with a preset frequency in the environment, it outputs a high level with a preset duration to the input end of the timeout self-shutdown circuit; the switch circuit is connected to the output end of the timeout self-shutdown circuit; and when the output end is at a high level, it turns on the power supply module to power the controller, sensing detection module, and high-frequency communication module; after the controller is powered on, it generates a control level and inputs it to the input end of the timeout self-shutdown circuit to control the output level of the timeout self-shutdown circuit, collects the monitoring data of the sensing detection module, and performs data transmission with devices in the environment through the high-frequency communication module.
[0014] In an embodiment of the present application, the low-frequency wake-up module operates in a low-power mode.
[0015] The present application also provides a method applied to the aforementioned wireless sensing detection system, and the method includes: when the low-frequency wake-up module detects a low-frequency signal with a preset frequency in the environment, controlling the timeout self-shutdown circuit to output a high level, so that the controller, sensing detection module, and high-frequency communication module are powered on; collecting the monitoring data of the sensing detection module through the controller, and performing data transmission with devices in the environment in a high-frequency communication manner.
[0016] In an embodiment of the present application, after the data transmission is completed, it further includes: outputting a low level to the timeout self-shutdown circuit through the controller, so that the power supply of the controller, sensing detection module, and high-frequency communication module is disconnected.
[0017] As described above, a timeout self-shutdown circuit, wireless sensing detection system, and method proposed by the present application have the following beneficial effects.
[0018] By setting a timeout self-shutdown circuit in the present application to automatically pull down the level, during the wireless sensing detection process, when no detection signal in the environment is detected, it can automatically switch to the low-power working mode, reduce device power consumption, has a simple structure, can achieve miniaturized design, and at the same time can combine low-frequency wake-up and high-frequency communication during the wireless sensing detection process to achieve high-real-time data acquisition, with a longer data transmission distance, and can meet the wireless transmission requirements of larger scenarios. Description of the Drawings
[0019] Figure 1 It is a schematic diagram of the timeout self-shutdown circuit in an embodiment of the present application.
[0020] Figure 2This is a schematic diagram of the architecture of a wireless sensing detection system in an embodiment of the present application.
[0021] Figure 3 This is a schematic flowchart of a method applied to a wireless sensing detection system in an embodiment of the present application. Detailed implementation manners
[0022] The following uses specific specific examples to illustrate the implementation manners of the present invention. Those skilled in the art can easily understand other advantages and effects of the present invention from the content disclosed in this specification. The present invention can also be implemented or applied through other different specific implementation manners. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of the present invention. It should be noted that, without conflict, the following embodiments and the features in the embodiments can be combined with each other.
[0023] It should be noted that the diagrams provided in the following embodiments only illustrate the basic concept of the present invention in a schematic manner. Therefore, only the components related to the present invention are shown in the diagrams, rather than being drawn according to the number, shape, and size of the components in actual implementation. The type, quantity, and ratio of each component in its actual implementation can be arbitrarily changed, and the component layout type may also be more complex.
[0024] The inventor has found through research that:
[0025] Near Field Communication (NFC) allows non-contact peer-to-peer data transmission between electronic devices. The transmitted information is converted into an electrical signal through an NFC coil. However, its communication distance is less than 10 cm, which is suitable for near field communications such as mobile payment, identity recognition, keys, and electronic tickets, and is not suitable for long-distance data transmission.
[0026] Passive Radio Frequency Identification (RFID): Receives microwave signals transmitted by an RFID reader, obtains energy through an electromagnetic induction coil to supply power to itself briefly, and thus completes information exchange. However, its data transmission volume is small, usually fixed data such as identity recognition, the coil size is large, the security is not strong, and the data is easily intercepted and tampered with.
[0027] Using short-distance communications such as 2.4G and 433M, starting intermittently to collect and transmit back data. However, such communication methods have high power consumption and poor real-time performance.
[0028] Based on the problems existing in the above prior art, the present application proposes an overtime self-turn-off circuit, a wireless sensing detection system, and a method. The technical solutions of the present application will be elaborated in detail below with reference to specific embodiments.
[0029] Please refer to Figure 1 , Figure 1This is the schematic diagram of the timeout self - shutdown circuit in an embodiment of the present application. The circuit includes a level transfer branch connecting the input terminal and the output terminal; a charging delay branch that gradually raises the output level through a charging unit when the input terminal is at a high level; and a switching device whose control terminal is connected to the output level and pulls down the output terminal level when the output level reaches the opening threshold.
[0030] In one embodiment, the charging delay branch includes a first resistor, a first diode, a second resistor, and a first capacitor. One end of the first resistor is connected to the cathode of the first diode and is connected to the input terminal; the other end of the first resistor is connected to the anode of the first diode and is connected to the control terminal of the switching device; one end of the second resistor is connected to one end of the first capacitor and is connected to the control terminal; the other end of the second resistor is connected to the other end of the first capacitor and is grounded.
[0031] In one embodiment, the level transfer branch includes a third resistor. Figure 1 Only the case where one resistor constitutes the level transfer branch is shown here. Of course, it can also be set as other devices according to requirements, as long as it is ensured that when the input terminal of this branch is at a high level, the output terminal is also at a high level, and the resistance value of the resistor can also be adjusted according to requirements, which is not limited here. The high and low levels in the embodiments of the present application are relative concepts, and the specific values of the high and low levels can be set and adjusted according to application requirements.
[0032] In one embodiment, the switching device includes a transistor. The gate of the transistor serves as the control terminal, the source is grounded, and the drain is connected to the output terminal. Exemplarily, the transistor can be an NMOS transistor.
[0033] Specifically, the working process of the timeout self - shutdown circuit is as follows:
[0034] When the control signal B - 1 is at a low level, V1 - G is pulled to a low level through the diode D1, the switching NMOS is in the off state, and C - 1 is pulled to a low level by B - 1 through R3.
[0035] When the control signal B - 1 is at a high level, C - 1 is pulled high and charges C1 through R1. The voltage of V1 - G starts to rise gradually from 0V until the voltage of V1 - G reaches the opening voltage of NMOS V1, V1 turns on, C - 1 is pulled to a low level, the power switch is turned off, and the controller E loses power, and E - 1 is pulled low. Thus, B - 1, V1 - G, and C - 1 are pulled low. Among them, the timeout is jointly determined by R1, R2, and C1 and can be set between several seconds and dozens of seconds.
[0036] The timeout self - shutdown circuit can prevent the controller program from running wild, resulting in C - 1 being high and the circuit being unable to lose power, ensuring the safe operation of the system.
[0037] Please refer to Figure 2 , Figure 2 , which is a schematic diagram of the architecture of a wireless sensing detection system in an embodiment of the present application. The system includes: the aforementioned timeout self - shutdown circuit, low - frequency wake - up module, power supply module, switch circuit, controller, sensing detection module, and high - frequency communication module; wherein, the power supply module supplies power to the low - frequency wake - up module; when the low - frequency wake - up module detects a low - frequency signal with a preset frequency in the environment, it outputs a high - level signal with a preset duration to the input end of the timeout self - shutdown circuit; the switch circuit is connected to the output end of the timeout self - shutdown circuit; and when the output end is at a high level, it turns on the power supply module to supply power to the controller, sensing detection module, and high - frequency communication module; after the controller is powered on, it generates a control level and inputs it to the input end of the timeout self - shutdown circuit to control the output level of the timeout self - shutdown circuit, and collects the monitoring data of the sensing detection module, and conducts data transmission with devices in the environment through the high - frequency communication module. Figure 2 Only the case where the scanning frequency of the low - frequency wake - up module is 125KHZ is shown in, of course, the specific size of the low - frequency scanning frequency (i.e., the frequency of the detected low - frequency signal) can be set and adjusted according to the actual product application requirements, and there is no limitation here. The power supply module can use a button battery or other energy storage units, and there is no limitation here. The switch circuit can be a transistor or a voltage - controlled switch array, etc. The controller can be a device with data - processing functions such as an ECU, MCU, programmable logic gate array, etc., and the specific controller selection can be determined according to actual needs, and there is no limitation here. The sensing detection module can include various environmental sensors, such as temperature sensors, pressure sensors, humidity sensors, image sensors, etc., which are specifically determined according to the information to be collected in the scenario, and there is no limitation here. The high - frequency communication module can convert the data that the controller needs to transmit into a high - frequency signal and send it into the environment to interact with the corresponding devices in the environment. The specific high - frequency communication frequency can be set and adjusted according to the actual wireless transmission distance required, and there is no limitation here.
[0038] Specifically, the 125KHz low - frequency wake - up circuit is powered by a battery and is in a listening state, detecting the 125KHz signal in the environment. This signal uses Manchester coding. After the coding is matched, the wake - up pin outputs a high - level signal lasting for 100ms. Through a diode and the timeout self - shutdown circuit, the power switch circuit is turned on to supply power to the controller, sensing monitoring circuit, and high - frequency communication circuit. After the controller works, it outputs a high - level signal through a pin, forms an OR gate with the low - frequency wake - up signal through a diode, and controls the power switch circuit through the timeout self - shutdown circuit. The controller collects the monitoring data of the sensor and conducts data transmission with the outside through high - frequency communication. After the data transmission is completed, the controller pulls down the power switch signal to power off the system. The detailed process is as follows:
[0039] 1-1. The 125KHz low-frequency wake-up circuit is powered by a battery, monitors the 125KHz signal in the environment, and outputs a high-level signal A-1 with a duration of 100ms after detecting the signal and matching the encoded data.
[0040] 1-2. The high-level signal A-1 generates a high-level signal C-1 through the timeout self-turn-off circuit.
[0041] 1-3. When C-1 is high, the power switch circuit is turned on, and the controller E, sensor F, and high-frequency communication circuit G are powered by the battery. The controller E initializes and generates a high-level signal E-1, which forms a logic OR gate with A-1 through a diode, keeping C-1 high continuously.
[0042] 1-4. The controller E completes the acquisition of the data of the sensor F and exchanges data with external devices through the high-frequency communication circuit G.
[0043] 1-5. After completing the data transmission, the controller pulls down the signal E-1, and at the same time C-1 is pulled down, the switch circuit is turned off, and the controller E, sensor monitoring circuit F, and high-frequency communication circuit G lose power, and the entire system resumes ultra-low power consumption.
[0044] The wireless sensing detection system of the embodiment of the present application is for low-power, multi-node data transmission application environments, such as battery-powered sensor data acquisition, and solves the problems of low power consumption, small size, wireless communication, and high real-time performance. By combining low-frequency wake-up and high-frequency communication, the standby current can be as low as 2uA; data is collected immediately without delay; the data communication distance is greater than 10 meters; through the low-frequency wake-up circuit to control power management, the system can be woken up in real time, start long-distance transmission and automatically power off without consuming additional power, and this ultra-low-power wireless sensing monitoring technology has great practical significance.
[0045] Please refer to Figure 3 , Figure 3 which is a schematic flowchart of a method applied to a wireless sensing detection system in an embodiment of the present application. The method includes: when the low-frequency wake-up module detects a low-frequency signal with a preset frequency in the environment, controlling the timeout self-turn-off circuit to output a high level, so that the controller, sensing detection module, and high-frequency communication module are powered on; collecting the monitoring data of the sensing detection module through the controller, and performing data transmission with devices in the environment through high-frequency communication.
[0046] In an embodiment, after completing the data transmission, it further includes: outputting a low level to the timeout self-turn-off circuit through the controller, so that the power supplies of the controller, sensing detection module, and high-frequency communication module are disconnected.
[0047] The implementation process of the specific method has been elaborated in detail in the foregoing system embodiment and will not be repeated here.
[0048] The above embodiments are only illustrative of the principles and effects of the present invention, and are not intended to limit the present invention. Any person familiar with this technology can modify or change the above embodiments without departing from the spirit and scope of the present invention. Therefore, all equivalent modifications or changes made by those with ordinary knowledge in the technical field without departing from the spirit and technical ideas disclosed by the present invention should still be covered by the claims of the present invention.
Claims
1. An overtime self-turn-off circuit, characterized in that Comprising: A level transfer branch, which connects the input end and the output end; A charging delay branch, which gradually raises the output level through a charging unit when the input end is at a high level; A switching device, whose control end is connected to the output level, and when the output level reaches the turn-on threshold, pulls down the level of the output end.
2. The timeout self-shutdown circuit according to claim 1, characterized in that, The charging delay branch includes a first resistor, a first diode, a second resistor and a first capacitor. One end of the first resistor is connected to the negative electrode of the first diode and connected to the input end; the other end of the first resistor is connected to the positive electrode of the first diode and connected to the control end of the switching device; one end of the second resistor is connected to one end of the first capacitor and connected to the control end; the other end of the second resistor is connected to the other end of the first capacitor and grounded.
3. The timeout self-shutdown circuit according to claim 1 or 2, characterized in that The level transfer branch includes a third resistor.
4. The timeout self-turn-off circuit according to claim 1, wherein The switching device includes a transistor, the gate of the transistor serves as the control end, the source is grounded, and the drain is connected to the output end.
5. A wireless sensing detection system, characterized in that, Comprising: The timeout self-turn-off circuit, low-frequency wake-up module, power supply module, switching circuit, controller, sensing detection module and high-frequency communication module as described in any one of claims 1-4; Wherein, the power supply module supplies power to the low-frequency wake-up module; when the low-frequency wake-up module detects a low-frequency signal with a preset frequency in the environment, it outputs a high level with a preset duration to the input end of the timeout self-turn-off circuit; the switching circuit is connected to the output end of the timeout self-turn-off circuit; and when the output end is at a high level, it turns on the power supply module to supply power to the controller, sensing detection module and high-frequency communication module; after the controller is powered on, it generates a control level and inputs it to the input end of the timeout self-turn-off circuit to control the output level of the timeout self-turn-off circuit, and collects the monitoring data of the sensing detection module, and performs data transmission with devices in the environment through the high-frequency communication module.
6. The wireless sensing detection system according to claim 5, characterized in that, The low-frequency wake-up module operates in a low-power mode.
7. A method applied to the wireless sensing detection system as described in claim 5, characterized in that, The method includes: When the low-frequency wake-up module detects a low-frequency signal with a preset frequency in the environment, controlling the timeout self-turn-off circuit to output a high level, so that the controller, sensing detection module and high-frequency communication module are powered on; Collecting the monitoring data of the sensing detection module through the controller, and performing data transmission with devices in the environment by means of high-frequency communication.
8. The method according to claim 7, wherein After the data transmission is completed, it further includes: outputting a low level to the timeout self-turn-off circuit through the controller, so that the power supply of the controller, sensing detection module and high-frequency communication module is disconnected.