CN109961616B - Electronic device and drop warning method - Google Patents
Electronic device and drop warning method Download PDFInfo
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- CN109961616B CN109961616B CN201711408079.1A CN201711408079A CN109961616B CN 109961616 B CN109961616 B CN 109961616B CN 201711408079 A CN201711408079 A CN 201711408079A CN 109961616 B CN109961616 B CN 109961616B
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- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
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Abstract
The invention provides an electronic device and a drop warning method. The electronic device includes a signal processing circuit, an acceleration sensor, and an edge sensor. The electronic device is provided with a device body. The signal processing circuit operates in a sleep mode. The acceleration sensor senses the acceleration change of the device body to generate an acceleration sensing signal. The acceleration sensor judges whether the acceleration sensing signal is continuously smaller than an acceleration threshold value in a preset time length so as to wake up the signal processing circuit. When the acceleration sensor wakes up the signal processing circuit, the signal processor starts the edge sensor. The edge sensor senses deformation change of the device body to generate at least a deformation sensing signal. The signal processing circuit analyzes the deformation sensing signal to judge whether the device body is dropped or not.
Description
Technical Field
The present invention relates to warning technologies, and more particularly, to an electronic device with a drop warning function and a drop warning method.
Background
When the mobile device is dropped from the user's clothing, personal belongings, or vehicle, the user usually waits until the next use to find the mobile device is lost. In the prior application, a user can issue instructions such as locking, starting sound alarm, clearing memory data and the like to the device through a communication network, and inquire the current position of the device by positioning technologies such as a GPS and the like built in the mobile device so as to retrieve the device. However, there is a window period from when the mobile device is lost to when the user finds it and performs remote treatment or retrieval. However, the longer the window period, the higher the probability of data leakage and the lower the probability of data recovery for the mobile device. Moreover, the user is also at risk of communication network outage or the mobile device losing power and not being able to do any treatment. In view of this, the present invention will now propose several embodiments of solutions.
Disclosure of Invention
The invention provides an electronic device with a function of automatically generating a drop warning signal.
The electronic device of the invention is provided with a device body, and the electronic device comprises a signal processing circuit, an acceleration sensor and at least one edge sensor. The signal processing circuit operates in a sleep mode. The acceleration sensor is coupled with the signal processing circuit. The acceleration sensor is used for sensing the acceleration change of the device body so as to generate an acceleration sensing signal. The acceleration sensor judges whether the acceleration sensing signal is continuously smaller than an acceleration threshold value in a preset time length so as to wake up the signal processing circuit.
The drop warning method is suitable for the electronic device. The electronic device comprises a device body, and the method comprises the following steps: operating the signal processing circuit in a sleep mode; the acceleration sensor is used for sensing the acceleration change of the device body to generate an acceleration sensing signal, and the acceleration sensor is used for judging whether the acceleration sensing signal is continuously smaller than an acceleration threshold value in a preset time length to wake up the signal processing circuit; when the acceleration sensor wakes up the signal processing circuit, the signal processing circuit starts at least one edge sensor, and the at least one edge sensor senses the deformation change of the device body to generate at least one deformation sensing signal; and analyzing the at least one deformation sensing signal by the signal processing circuit to judge whether the device body is dropped or not.
Based on the above, the electronic device and the drop warning method of the invention can effectively determine whether the device body of the electronic device has a drop event by the acceleration sensor, the edge sensor and the signal processing circuit, so as to generate a warning signal in real time to remind a user.
In order to make the aforementioned and other features and advantages of the invention more comprehensible, embodiments accompanied with figures are described in detail below.
Drawings
FIG. 1 is a block diagram of an electronic device according to an embodiment of the invention;
FIG. 2 is a block diagram of an electronic device according to another embodiment of the invention;
FIG. 3 is a schematic view of an electronic device according to an embodiment of the invention;
FIG. 4 is a schematic diagram of an acceleration sensing signal according to an embodiment of the invention;
FIG. 5 is a schematic diagram of deformation sensing signals according to an embodiment of the invention;
FIG. 6 is a schematic diagram of a slope variation profile according to an embodiment of the invention;
FIG. 7 is a flow chart of a method of drop warning according to an embodiment of the invention;
FIG. 8 is a schematic diagram of an acceleration sensing signal according to another embodiment of the present invention;
FIG. 9 is a schematic diagram of deformation sensing signals according to another embodiment of the invention;
FIG. 10 is a schematic diagram of a slope variation profile according to another embodiment of the present invention;
fig. 11 is a flowchart illustrating a drop warning method according to another embodiment of the invention.
[ notation ] to show
100. 200 and 300: an electronic device;
110. 210: a signal processing circuit;
120. 220, and (2) a step of: an acceleration sensor;
130. c1_1, C1_2, C1_ M, C2_1, C2_2, C2_ M, CN _1, CN _2, CN _ M, S1, S2, S3, S4, S5, S6: an edge sensor;
211: a signal processor;
212: an analog-to-digital converter;
213: a multiplexer;
214: a filter;
215: an amplifier;
216: a clock generator;
230_1, 230_2, 230_ N: an edge sensing module;
300B: a device body;
ax: an X-axis acceleration value;
ay: a Y-axis acceleration value;
az: a Z-axis acceleration value;
LS: left side;
and RS: the right side;
s701, S702, S703, S704, S705, S706, S707, S708, S709, S710, S711, S1110, S1120, S1130, S1140: and (5) carrying out the following steps.
Detailed Description
In order that the present invention may be more readily understood, the following detailed description is provided as an illustration of specific embodiments of the invention. Further, wherever possible, the same reference numbers will be used throughout the drawings and the description to refer to the same or like parts.
Fig. 1 is a block diagram of an electronic device according to an embodiment of the invention. Referring to fig. 1, the electronic device 100 includes a signal processing circuit 110, an acceleration sensor 120, and an edge sensor 130. The signal processing circuit 110 is coupled to the acceleration sensor 120 and the edge sensor 130. In the present embodiment, the signal processing circuit 110 operates in a Sleep mode (Sleep mode) in advance, and the acceleration sensor 120 senses a change in acceleration of the apparatus body of the electronic apparatus 100 to generate an acceleration sensing signal. In the present embodiment, the acceleration sensor 120 determines whether to wake up the signal processing circuit 110 by determining whether the acceleration sensing signal is continuously smaller than the acceleration threshold for a predetermined time period.
Specifically, when the acceleration sensor 120 determines that the acceleration sensing signal is continuously smaller than the acceleration threshold value for the preset time period, the acceleration sensor 120 immediately wakes up the signal processing circuit 110 to make the signal processing circuit 110 activate the edge sensor 130. In the present embodiment, the edge sensor 130 senses a deformation change of the device body of the electronic device 100 to generate a deformation sensing signal. The edge sensor 130 outputs a deformation sensing signal to the signal processing circuit 110, so that the signal processing circuit 110 determines whether the device body of the electronic device 100 is dropped by analyzing the deformation sensing signal, and further generates an alarm signal. In other words, when the acceleration sensor 120 does not determine that the acceleration sensing signal is continuously less than the acceleration threshold value for the preset time period, the acceleration sensor 120 does not wake up the signal processing circuit 110. If the signal processing circuit 110 determines that the device body of the electronic device 100 is not dropped, the signal processing circuit 110 returns to the sleep mode. That is, the electronic device 100 of the present embodiment has the functions of determining whether a drop event occurs and saving power consumption.
In the present embodiment, the electronic device 100 may be a mobile electronic device such as a mobile Phone (Phone), a tablet PC (tablet PC), a Wearable device (Wearable device), a Portable device (Portable device), or a Notebook computer (Notebook). In the embodiment, the Signal Processing circuit 110 is, for example, a Central Processing Unit (CPU), a System On Chip (SOC), or other Programmable general purpose or special purpose microprocessor (microprocessor), a Digital Signal Processor (DSP), a Programmable controller, an Application Specific Integrated Circuit (ASIC), a Programmable Logic Device (PLD), other similar Processing devices, or a combination thereof. The signal processing circuit 110 can perform signal analysis, processing and operation functions to implement the methods described in the embodiments of the present invention.
In the present embodiment, the acceleration sensor 120 is, for example, a gravity sensor (G-sensor). The acceleration sensor 120 may be used to sense acceleration values of a single axis or multiple axes, and has a function of judging the magnitude of the acceleration values. For example, the acceleration sensor 120 may be disposed inside the device body, and correspondingly generates an acceleration sensing signal according to a displacement condition of the device body. The acceleration sensing signals may include an X-axis acceleration value, a Y-axis acceleration value, and a Z-axis acceleration value. And, when the acceleration sensor 120 judges that the X-axis acceleration value, the Y-axis acceleration value, and the Z-axis acceleration value are simultaneously continuously less than the acceleration threshold value for a preset time length, the acceleration sensor 120 wakes up the signal processing circuit 110.
In the embodiment, in the event that the device body of the electronic device 100 is in a falling event, since the device body has an inertial acceleration during the falling process, the X-axis acceleration value, the Y-axis acceleration value and the Z-axis acceleration value measured by the acceleration sensor 120 should all be 0 in an ideal situation. However, the present embodiment further considers that there may be a slight error in the acceleration value actually measured by the acceleration sensor 120, and therefore the acceleration sensor 120 of the present embodiment is designed to determine that the electronic device 100 may be dropped when the acceleration value of the X axis, the acceleration value of the Y axis, and the acceleration value of the Z axis are continuously smaller than the acceleration threshold value for a preset time period. Therefore, in an embodiment, the acceleration sensor 120 may further include a comparator and a controller. The comparator is used for comparing the acceleration threshold value with the acceleration sensing signal so as to output a comparison result to the controller. And when the controller judges that the acceleration sensing signal is continuously smaller than the acceleration threshold value in the preset time length, the controller can output a wake-up signal to the signal processing circuit so as to wake up the signal processing circuit.
In the present embodiment, the edge sensor 130 may be, for example, a balanced bridge structure composed of a plurality of piezoresistors (varistors), wherein the balanced bridge structure may be, for example, a Wheatstone bridge (Wheatstone bridge). The edge sensor 130 generates a corresponding digital value according to the voltage value variation as a deformation sensing signal. In this embodiment, the edge sensor 130 may be disposed at a specific frame position of the device body of the electronic device 100 to sense whether the specific frame position of the device body of the electronic device 100 is deformed by pressure.
For example, in one embodiment, the electronic device 100 may be a mobile phone device. When the user places the electronic device 100 in a location such as a backpack or a pocket, the electronic device 100 may operate in a sleep state (except for the accelerometer sensor 120) because the electronic device 100 is not in an operated state. However, if the electronic device 100 is dropped, the electronic device 100 can automatically determine whether a drop event occurs to wake up the electronic device 100. Therefore, the electronic device 100 may send an alarm to notify the user or execute the related protection program in real time, which is not limited by the invention.
FIG. 2 is a block diagram of an electronic device according to another embodiment of the invention. Referring to fig. 2, the electronic device 200 includes a signal processing circuit 210, an acceleration sensor 220, and a plurality of edge sensing modules 230_1, 230_2 to 230_ N, where N is a positive integer greater than 0. In the present embodiment, the edge sensing modules 230_1, 230_2 to 230_ N may be respectively disposed at a plurality of frame positions of the device body of the electronic device 200, for example, so that the frame positions of the device body of the electronic device 200 may form a plurality of sensing regions. Moreover, the edge sensing modules 230_1 and 230_2 to 230_ N may further include edge sensors C1_1, C1_2 to C1_ M, C2_1, C2_2 to C2_ M, CN _1, and CN _2 to CN _ M, respectively, wherein M is a positive integer greater than 0. That is, in the present embodiment, the device body of the electronic device 200 may be configured with a plurality of sensing regions to increase the accuracy and the acuity for determining whether the device body has a drop event. The sensing regions may be, for example, the upper side, the lower side, the left side, the right side, the upper left corner, the upper right corner, the lower left corner, the lower right corner, the front side or the back side of the device body of the electronic device 200, which is not limited by the invention. Incidentally, when the electronic device 200 operates in the Normal mode, the edge sensing modules 230_1, 230_2 to 230_ N can be applied to the related operation functions or software applications of the electronic device 200.
In the embodiment, the signal processing circuit 210 includes a signal processor 211, an Analog-to-Digital Converter (ADC) 212, a Multiplexer (Multiplexer)213, a Filter (Filter)214, an Amplifier (Amplifier)215, and a Clock Generator (Clock Generator) 216. In the embodiment, the multiplexer 213 is coupled to the edge sensors C1_1, C1_2 to C1_ M, C2_1, C2_2 to C2_ M, CN _1, and CN _2 to CN _ M. The multiplexer 213 receives the strain sensing signals from the edge sensors C1_1, C1_ 2_ C1_ M, C2_1, C2_ 2_ C2_ M, CN _1, and CN _ 2_ CN _ M in time division, and outputs the strain sensing signals with the same sampling length to the filter 214 and the amplifier 215. In the present embodiment, the filter 214 is used to filter the deformation sensing signal to eliminate noise. The amplifier 215 is used to amplify the filtered strain sensing signal to increase the signal strength. In the present embodiment, the analog-to-digital converter 212 converts the deformation sensing signal in an analog form into a digital form and outputs to the signal processor 211. In the present embodiment, the clock generator 216 can provide a plurality of clock signals to the analog-to-digital converter 212, the multiplexer 213 and the amplifier 215 to synchronize the operation timings of these circuit elements.
In the present embodiment, the Signal Processor 211 may be a Digital Signal Processor (DSP), a System-on-a-Chip (SoC), an Application Specific Integrated Circuit (ASIC), or the like. The signal processor 211 may analyze the transformed deformation sensing signal to determine whether the device body is dropped. Moreover, when the signal processor 211 determines that the device body is dropped, the signal processor 211 may further output an alarm signal to other functional circuit elements or applications of the electronic device 200 to perform a predetermined alarm function.
It should be noted that the number of edge sensing modules and edge sensors of the present invention is not limited to that shown in FIG. 2. In one embodiment, the electronic device 200 may include only a single edge sensor, so as to determine whether a specific side of the device body of the electronic device 200 is deformed by the single edge sensor. The signal processing circuit 210 may not be provided with the multiplexer 213. The signal processing circuit 210 may directly receive the deformation sensing signal provided by this single edge sensor. In another embodiment, the electronic device 200 may not be configured with the filter 214 and the amplifier 215 to directly receive the strain sensing signal via the analog-to-digital converter 212. That is, the electronic device 200 of the present embodiment can selectively set the multiplexer 213, the filter 214, the amplifier 215 and the clock generator 216 according to different device requirements, product designs or circuit configurations.
Fig. 3 is a schematic view of an electronic device according to an embodiment of the invention. Referring to fig. 3, in the present embodiment, the electronic device 300 is a mobile phone device. The left LS bezel of the apparatus body 300B of the electronic apparatus 300 is provided with a plurality of edge sensors S1, S2, S3, and the right RS bezel of the apparatus body 300B is provided with a plurality of edge sensors S4, S5, S6. In the present embodiment, the device body 300B of the electronic device 300 is provided with the signal processing circuit and the acceleration sensor as described in the above embodiments of fig. 1 or fig. 2. In the embodiment, when the electronic device 300 performs a normal operation, the edge sensors S1-S6 can be used for providing a user with a pressing or touch operation in response to the related application function of the electronic device 300.
FIG. 4 is a schematic diagram of an acceleration sensing signal according to an embodiment of the invention. Referring to fig. 3 and 4, in the present embodiment, when the electronic device 300 executes the normal mode, the acceleration sensor of the electronic device 300 can sense the acceleration change of the device body 300B of the electronic device 300. For example, the acceleration sensor of the electronic device 300 may sense an acceleration sensing signal as shown in fig. 4. In the present embodiment, the acceleration sensing signals may include an X-axis acceleration value Ax, a Y-axis acceleration value Ay, and a Z-axis acceleration value Az. Also, when the user normally and fixedly uses the electronic device 300, the device body 300B is not severely displaced. Therefore, the X-axis acceleration value Ax, the Y-axis acceleration value Ay, and the Z-axis acceleration value Az may all be lower values.
FIG. 5 is a schematic diagram illustrating deformation sensing signals according to an embodiment of the invention. FIG. 6 is a schematic diagram of a slope variation distribution according to an embodiment of the invention. Referring to fig. 3, 5 and 6, in the embodiment, when the electronic device 300 executes the normal mode, the edge sensors S1-S6 can be used for providing a user with a pressing or touch operation to execute the related application function of the electronic device 300. Therefore, the edge sensors S1-S6 of the electronic device 300 can sense a plurality of deformation sensing signals as shown in fig. 5. In the present embodiment, when the user does not press (normal state) the edge sensors S1-S6 or the electronic device 300 is in the static state, no significant digital value changes in the deformation sensing signals of the edge sensors S1-S6. In the embodiment, when the user presses (hold state) the edge sensors S1-S6, the deformation sensing signals of the edge sensors S1-S6 may have significant digital value changes according to different pressing degrees of the user.
Also, in the present embodiment, the signal processing circuit may analyze the deformation sensing signals provided by the edge sensors S1-S6 to obtain a slope variation distribution of the deformation sensing signals as shown in fig. 6, wherein the slope value shown in fig. 6 may be determined by dividing a digital value by a time value (digital value/time value). In the present embodiment, the slope values of the deformation sensing signals corresponding to the edge sensors S1-S6 sequentially vary with the degree of pressing.
Fig. 7 is a flowchart illustrating a drop warning method according to an embodiment of the invention. The drop warning method of the present embodiment may be applied to the electronic device of the embodiments shown in fig. 1 to 3. Referring to fig. 3 and 7, in the present embodiment, the electronic device 300 is a mobile phone device. The left LS bezel of the main body 300B of the electronic device 300 is provided with a plurality of edge sensors S1 to S3, and the right RS bezel of the main body 300B is provided with a plurality of edge sensors S4 to S6. In the present embodiment, the signal processing circuit and the acceleration sensor as described in the embodiment of fig. 1 or fig. 2 are disposed in the device body 300B of the electronic device 300, so that the electronic device 300 can perform the following steps.
In step S701, the electronic device 300 operates the signal processing circuit (signal processor) in the sleep mode. In step S702, the signal processing circuit of the electronic device 300 and the edge sensors S1-S6 are operated in the sleep mode in advance, but the acceleration sensor of the electronic device 300 is continuously operated, so that the electronic device 300 can immediately determine whether the acceleration sensing signal is smaller than the acceleration threshold value by the acceleration sensor. If yes, step S703 is executed, and the acceleration sensor of the electronic device 300 further determines whether the acceleration sensing signal lasts for a preset time length less than the acceleration threshold. If not, the electronic device 300 continues to perform step S701. In the present embodiment, the acceleration threshold may be, for example, 0.1 (m/s)2)、1(m/s2) Or 2 (m/s)2) Etc., and the preset time length may be, for example, 0.1 millisecond (ms), 1 millisecond (ms), 10 milliseconds (ms). The acceleration threshold and the predetermined time period may be determined according to different device requirements or product designs, and the invention is not limited thereto.
In step S703, when the acceleration sensor of the electronic device 300 determines that the acceleration sensing signal lasts for a preset time period less than the acceleration threshold. The electronic device 300 executes step S704. In step S704, the acceleration sensor of the electronic device 300 wakes up the signal processing circuit. In step S705, the signal processing circuit activates the plurality of edge sensors S1 to S6 to sense the degree of deformation of the plurality of sensing regions of the device body 300B. In step S706, the signal processing circuit of the electronic device 300 may time-division sample the edge sensors S1-S6 through a multiplexer to obtain a plurality of strain sensing signals. In step S707, the signal processing circuit of the electronic device 300 may filter and enhance the deformation sensing signals by the filter and the amplifier. In step S708, the signal processing circuit of the electronic device 300 may convert the deformation sensing signals from analog signals to digital signals by an analog-to-digital converter. In step S709, the signal processing circuit of the electronic device 300 may analyze the deformation sensing signals by the signal processor. In step S710, the signal processor of the electronic device 300 can determine whether the device body 300B of the electronic device 300 is dropped according to the analysis result of the deformation sensing signals. In step S711, the signal processing circuit of the electronic device 300 may output an alarm signal.
In addition, the related device features, technical details and implementation details of the electronic device 300 of the present embodiment can be obtained from the above embodiments of fig. 1 to 6, and thus are not repeated herein. However, in order to make those skilled in the art further understand the specific signal analysis and determination manner of step S709 and step S710, the following description is provided by referring to fig. 8 to 10.
FIG. 8 is a schematic diagram of an acceleration sensing signal according to another embodiment of the invention. Referring to fig. 3, 7 and 8, in the present embodiment, the acceleration sensor of the electronic device 300 may sense an acceleration sensing signal as shown in fig. 8. In the present embodiment, the acceleration sensing signals may include an X-axis acceleration value Ax, a Y-axis acceleration value Ay, and a Z-axis acceleration value Az. For example, when the user carries the electronic device 300 to move in the X-axis direction (Normal state), the X-axis acceleration value Ax may be a specific value, and the Y-axis acceleration value Ay and the Z-axis acceleration value Az are about 0. However, when the electronic device 300 is dropped (Free fall movement state), the X-axis acceleration value Ax, the Y-axis acceleration value Ay, and the Z-axis acceleration value Az may be about 0 because the device body 300B of the electronic device 300 has an inertial acceleration during the dropping process. Therefore, the acceleration sensor of the electronic device 300 can immediately determine whether the X-axis acceleration value Ax, the Y-axis acceleration value Ay, and the Z-axis acceleration value Az are continuously less than the acceleration threshold value for a preset length of time at the same time. And if so, the acceleration sensor wakes up the signal processing circuit. Furthermore, when the device body 300B of the electronic device 300 falls to the ground (Strike state), the acceleration sensor can sense a drastic change in acceleration value, and thus the X-axis acceleration value Ax, the Y-axis acceleration value Ay, and the Z-axis acceleration value Az have a large change at the moment of falling. That is, in an embodiment, the electronic device 300 may further determine whether the falling event occurs by determining the change result of the values of the X-axis acceleration value Ax, the Y-axis acceleration value Ay, and the Z-axis acceleration value Az provided by the acceleration sensor.
FIG. 9 is a schematic diagram of deformation sensing signals according to another embodiment of the invention. FIG. 10 is a schematic diagram of a slope variation distribution according to another embodiment of the invention. Referring to fig. 3, 7, 9 and 10, in the present embodiment, when the signal processing circuit of the electronic device 300 is woken up, the edge sensors S1 to S6 can be used to sense the deformation change of the frame position of the corresponding sensing region of the device body 300B. For example, when the user carries the electronic device 300 under a moving condition or a non-moving condition (Normal state), the deformation sensing signals sensed by the edge sensors S1-S6 have no significant change. In addition, when the electronic device 300 is dropped (Free fall movement state), the device body 300B of the electronic device 300 is not deformed by pressure during the dropping process, and thus the deformation sensing signals sensed by the edge sensors S1-S6 are not changed significantly. However, when the device body 300B of the electronic device 300 falls to the floor (Strike state), the edge sensors S1-S6 can sense different and severe deformation changes, respectively. Particularly, at the instant when the apparatus body 300B falls on the ground, the edge sensors S1 to S6 can sense the instant change in digital value.
In the present embodiment, the signal processing circuit may analyze the deformation sensing signals provided by the edge sensors S1-S6 to obtain a slope variation distribution of the deformation sensing signals as shown in fig. 10. For example, the position of the bezel corresponding to the edge sensor S1 may be the first contact position between the apparatus body 300B and the ground, and thus the deformation sensing signal sensed by the edge sensor S1 has a drastic change in digital value at the moment the apparatus body 300B falls off the ground. That is, the signal processor of the electronic device 300 may determine whether at least one of the slope change profiles corresponding to the edge sensors S1-S6 has a slope value with a slope change amount per unit time greater than a slope threshold value, so as to determine that the device body 300B has a drop event. For another example, as shown in fig. 10, the signal processor may determine whether the slope change corresponding to at least one of the edge sensors S1-S6 between time point 3 and time point 4 is greater than a slope threshold, wherein the slope threshold may be 10000 or 20000, for example. Therefore, the signal processor of the electronic device 300 can accurately determine that the device body 300B falls off the ground, so as to further output the warning signal.
In addition, in an embodiment, the electronic device 300 may further have a function of adjusting the slope threshold. For example, when the electronic device 300 is thrown, played or placed by a user, the edge sensors S1 to S6 may be touched by mistake, so that the electronic device 300 determines the falling event by mistake and generates a warning signal. Therefore, in another embodiment, the signal processor of the electronic device 300 may analyze the rising and falling slopes of the deformation sensing signal, and may be matched with a learning mechanism for determining the magnitude of the signal quantity, calculating the free-fall movement time, and the user behavior, so as to improve the accuracy of the deformation sensing signal analysis. For another example, the signal processor of the electronic device 300 may provide a confirmation message to the user every time the warning signal is generated, so as to provide feedback to the user and confirm whether the drop event actually occurs. Therefore, the signal processor of the electronic device 300 can record a plurality of events, and determine whether the magnitude of the slope threshold is too high or too low by integrated analysis, so as to adjust the slope threshold in an automatic learning manner, thereby improving the accuracy of determining the drop event by the signal processor of the electronic device 300.
Fig. 11 is a flowchart illustrating a drop warning method according to another embodiment of the invention. Referring to fig. 1 and fig. 11, the drop warning method of the present invention is at least applicable to the electronic device 100 of the embodiment of fig. 1. In step S1110, the electronic device 100 operates the signal processing circuit 110 in the sleep mode. In step S1120, the electronic device 100 senses the acceleration change of the device body by the acceleration sensor 120 to generate an acceleration sensing signal. Moreover, the electronic device 100 determines whether the acceleration sensing signal is continuously smaller than the acceleration threshold for a predetermined time period by the acceleration sensor 120 to wake up the signal processing circuit 110. In step S1130, when the acceleration sensor 120 wakes up the signal processing circuit 110, the electronic device 100 activates the edge sensor 130 via the signal processing circuit 110, and senses a deformation change of the device body via the edge sensor 130 to generate a deformation sensing signal. In step S1140, the electronic device 100 analyzes the deformation sensing signal by the signal processing circuit 110 to determine whether the device body is dropped. Therefore, the electronic device 100 of the present embodiment has the functions of determining whether a drop event occurs and saving power consumption.
In addition, the related device features, technical details and implementation details of the electronic device 100 of the present embodiment can be obtained from the above embodiments of fig. 1 to 10 to obtain sufficient teaching, suggestion and implementation descriptions, and thus are not repeated herein.
In summary, the electronic device and the drop warning method of the present invention can effectively determine whether a drop event occurs in the device body of the electronic device. When the acceleration sensor of the electronic device determines that a drop event may occur, the signal processing circuit and the edge sensor of the electronic device are awakened for further acceleration sensing and signal analysis, so that the electronic device can accurately determine whether the drop event occurs and can immediately output an alarm signal. In addition, the electronic device and the drop warning method of the invention also have the function of saving the power consumption of the signal processing circuit and the edge sensor.
Although the present invention has been described with reference to the above embodiments, it should be understood that various changes and modifications can be made therein by those skilled in the art without departing from the spirit and scope of the invention.
Claims (16)
1. An electronic device having a device body, the electronic device comprising:
a signal processing circuit operating in a sleep mode;
the acceleration sensor is coupled with the signal processing circuit and used for sensing the acceleration change of the device body so as to generate an acceleration sensing signal, wherein the acceleration sensor judges whether the acceleration sensing signal is continuously smaller than an acceleration threshold value in a preset time length so as to wake up the signal processing circuit; and
at least one edge sensor coupled to the signal processing circuit, wherein when the acceleration sensor wakes up the signal processing circuit, the signal processing circuit activates the at least one edge sensor, the at least one edge sensor is used for sensing deformation change of the device body to generate at least one deformation sensing signal,
wherein the signal processing circuit analyzes the at least one deformation sensing signal to determine whether a falling event occurs in the device body,
wherein the at least one edge sensor is disposed at least one frame position of the apparatus body,
the at least one edge sensor may be applied to an associated operating function of the electronic device or to a software application.
2. The electronic device of claim 1, wherein if the signal processing circuit determines that the drop event occurs in the device body, the signal processing circuit generates an alarm signal, and if the signal processing circuit determines that the drop event does not occur in the device body, the signal processing circuit operates in the sleep mode again.
3. The electronic device according to claim 1, wherein the acceleration sensor is disposed in the device body, and the acceleration sensing signal includes an X-axis acceleration value, a Y-axis acceleration value, and a Z-axis acceleration value,
when the acceleration sensor judges that the X-axis acceleration value, the Y-axis acceleration value and the Z-axis acceleration value are continuously smaller than the acceleration threshold value in the preset time length at the same time, the acceleration sensor wakes up the signal processing circuit.
4. The electronic device of claim 1, wherein the acceleration sensor comprises a comparator and a controller, and the comparator is configured to compare the acceleration threshold with the acceleration sensing signal to output a comparison result to the controller,
when the controller judges that the acceleration sensing signal is continuously smaller than the acceleration threshold value in the preset time length, the controller outputs a wake-up signal to the signal processing circuit.
5. The electronic device of claim 1, wherein the at least one edge sensor is a balanced bridge configuration of piezoresistors.
6. The electronic device of claim 1, wherein the signal processing circuit comprises:
an analog-to-digital converter, coupled to the at least one deformation sensing signal, for receiving the at least one deformation sensing signal and converting the at least one deformation sensing signal; and
a signal processor, coupled to the adc, for receiving the converted at least one deformation sensing signal and analyzing the converted at least one deformation sensing signal to determine whether the device body has the drop event.
7. The electronic device of claim 6, wherein the signal processor analyzes the transformed at least one deformation sensing signal to obtain a slope variation distribution having a plurality of slope values, and the signal processor determines whether the slope values have a slope variation larger than a slope threshold to determine that the device body has the drop event.
8. The electronic device of claim 6, wherein the signal processing circuit further comprises:
and a multiplexer, coupled to the at least one edge sensor, for receiving the at least one deformation sensing signal in a time division manner and outputting the at least one deformation sensing signal with the same sampling length, wherein the number of the at least one edge sensor is plural.
9. A fall warning method applied to an electronic device, wherein the electronic device comprises a device body, the method comprising:
operating the signal processing circuit in a sleep mode;
sensing the acceleration change of the device body by an acceleration sensor to generate an acceleration sensing signal, and judging whether the acceleration sensing signal is continuously smaller than an acceleration threshold value in a preset time length by the acceleration sensor to wake up the signal processing circuit;
when the acceleration sensor wakes up the signal processing circuit, starting at least one edge sensor by the signal processing circuit, and sensing the deformation change of the device body by the at least one edge sensor to generate at least one deformation sensing signal; and
analyzing the at least one deformation sensing signal by the signal processing circuit to determine whether the device body is dropped,
wherein the at least one edge sensor is disposed at least one frame position of the apparatus body,
the at least one edge sensor may be applied to an associated operating function of the electronic device or to a software application.
10. The drop alert method of claim 9, further comprising:
if the signal processing circuit judges that the device body has the falling event, generating a warning signal by the signal processing circuit; and
and if the signal processing circuit judges that the device body does not have the falling event, the signal processing circuit operates in the sleep mode again.
11. The drop warning method according to claim 9, wherein the acceleration sensor is disposed in the device body, and the acceleration sensing signal includes an X-axis acceleration value, a Y-axis acceleration value, and a Z-axis acceleration value, wherein the step of determining whether the acceleration sensing signal is continuously smaller than the acceleration threshold value for the preset time duration by the acceleration sensor to wake up the signal processing circuit comprises:
when the acceleration sensor judges that the X-axis acceleration value, the Y-axis acceleration value and the Z-axis acceleration value are continuously smaller than the acceleration threshold value in the preset time length at the same time, the acceleration sensor wakes up the signal processing circuit.
12. The drop alert method according to claim 9, wherein the acceleration sensor comprises a comparator and a controller, and the step of determining whether the acceleration sensing signal is continuously smaller than the acceleration threshold value for the preset time period by the acceleration sensor to wake up the signal processing circuit comprises:
comparing, by the comparator, the acceleration threshold with the acceleration sensing signal to output a comparison result to the controller; and
when the controller judges that the acceleration sensing signal is continuously smaller than the acceleration threshold value in the preset time length, outputting a wake-up signal to the signal processing circuit by the controller.
13. The drop alert method of claim 9 wherein the at least one edge sensor is a balanced bridge configuration of a plurality of piezoresistors.
14. The method of claim 9, wherein the signal processing circuit comprises an analog-to-digital converter and a signal processor, and wherein the step of analyzing the at least one deformation sensing signal by the signal processing circuit to determine whether the drop event occurs in the device body comprises:
receiving the at least one deformation sensing signal by the analog-to-digital converter and converting the at least one deformation sensing signal; and
receiving, by the signal processor, the converted at least one deformation sensing signal, and analyzing the converted at least one deformation sensing signal to determine whether the drop event occurs in the device body.
15. The method of claim 14, wherein the step of receiving the transformed at least one deformation sensing signal by the signal processor and analyzing the transformed at least one deformation sensing signal to determine whether the drop event occurs in the device body comprises:
analyzing, by the signal processor, the converted at least one deformation sensing signal to obtain a slope change distribution having a plurality of slope values; and
and judging whether the slope values have slope variation larger than a slope threshold value or not by the signal processor so as to judge that the falling event occurs in the device body.
16. The method of claim 14, wherein the signal processing circuit further comprises a multiplexer and the at least one edge sensor is provided in a plurality of numbers, wherein the step of sensing a deformation change of the device body by the at least one edge sensor to generate the at least one deformation sensing signal comprises:
and receiving the at least one deformation sensing signal by the multiplexer in a time division manner, and outputting the at least one deformation sensing signal with the same sampling length.
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| CN116012381B (en) * | 2023-03-27 | 2023-06-16 | 四川高速公路建设开发集团有限公司 | Method and system for alarming foreign matters falling from vehicle |
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