TWI494235B - Distance warning method by applying bluetooth system - Google Patents

Description

Distance warning method using Bluetooth system

The invention relates to a warning method for applying a Bluetooth system, in particular to a distance warning method for measuring a distance by using a Bluetooth system.

Today's technology is changing day by day. For example, the key to a traditional vehicle is the mechanical opening of the vehicle's door or engine. However, the keys to today's vehicles are mostly inductive keys, when the user is near the vehicle. If the vehicle senses the inductive key, the door or engine of the locking vehicle can be opened by itself to reduce the trouble for the user to use the vehicle.

Moreover, today's inductive keys mostly use radio frequency (RF) technology or radio frequency identification (RFID) technology. Both of these technologies have two corresponding tags and identifiers. When the identifier senses the tag, the carrier can then open the door or engine of the locking carrier. However, both of these technologies are line of sight (LOS) technologies, so they are more susceptible to interference and increase user inconvenience.

In view of the above-mentioned problems of the prior art, one of the objects of the present invention is to provide a distance warning method for applying a Bluetooth system, thereby making it difficult to utilize the Bluetooth system. The function of interference and measurable distance to achieve the purpose of warning users who are away from the vehicle or lost the key.

Therefore, in order to achieve the above objective, the distance warning method for applying the Bluetooth system of the present invention includes at least the following steps: using a Bluetooth system to obtain a distance between the carrier and the handheld device, wherein the user can open the load by using the handheld device. a door, an engine or other device, and the Bluetooth system can include a first Bluetooth device and a second Bluetooth device, and one of the first Bluetooth device and the second Bluetooth device is disposed on the carrier, and the other is disposed on the handheld device The user can be located on the vehicle or carry the handheld device; use the Bluetooth system to determine whether the distance value is greater than the preset distance value, and if so, the Bluetooth system sends a warning signal to alert the user, if not, the carrier and the handheld device are mutually Exchange messages to synchronize the status of the vehicle and handheld device.

Therefore, one of the features of the distance warning method for applying the Bluetooth system of the present invention is that the distance warning method of the Bluetooth system of the present invention can increase the security and convenience of transmission and pairing by applying the Bluetooth system.

Another feature of the distance warning method for applying the Bluetooth system of the present invention is that the difference between the distance values measured by the Bluetooth system and the warning signal is issued, so that the Bluetooth system can alert the user that the distance from the vehicle or the handheld device is too large. distant.

The step of obtaining the distance between the carrier and the handheld device may further include the following steps: the first Bluetooth device transmits the ranging signal to the second Bluetooth device, so that the second Bluetooth device knows the ranging signal. The signal strength is determined by the second Bluetooth device according to the signal strength to learn the distance between the carrier and the handheld device; and the second Bluetooth device transmits the distance value to the first Bluetooth device, so that the first Bluetooth device knows the distance value.

Therefore, another feature of the distance warning method for applying the Bluetooth system of the present invention is that the distance value between the carrier and the handheld device is obtained by using the Bluetooth system.

The carrier can be, for example, a second, four or more wheeled mobile vehicle. And the handheld device can be, for example, a cell phone or a key.

The warning signal can be, for example, an optical signal, an audio signal, a vibration signal, a graphic signal, a text signal, an image signal or other signal that can alert the user.

The Bluetooth system can further determine whether the vehicle is in an activated state when the distance value is greater than the preset distance value. If yes, the vehicle sends a warning signal to alert the user. If not, the handheld device sends a warning signal to alert the user. .

Wherein, when the vehicle is in the startup state, the Bluetooth system can further determine whether the distance between the carrier and the handheld device is less than the attention distance value, and if so, the handheld device can emit the attention signal.

In addition, the carrier can transmit status signals to the handheld device when the vehicle is at rest. Moreover, the status signal can be, for example, a warning signal.

In addition, the Bluetooth system to which the present invention is applied may further have a memory unit, and the preset distance value may be stored, for example, in the memory unit.

In addition, the Bluetooth system to which the present invention is applied may further have an input device for the user to set a preset distance value using the input device.

According to the above, the distance warning method of the Bluetooth system according to the present invention may have one or more of the following advantages:

(1) By applying Bluetooth technology, the distance warning method of the Bluetooth system of the present invention can be used to increase the security and convenience of transmission and pairing.

(2) The difference in the distance value measured by the Bluetooth system and the warning signal are issued so that the Bluetooth system can alert the user that it is too far away from the vehicle or the handheld device.

(3) The distance between the carrier and the handheld device is obtained by using the Bluetooth transceiver and the processor in the Bluetooth system.

Steps 100-426‧‧

500‧‧‧Bluetooth Vehicle Control System

510‧‧‧Car Bluetooth device

511‧‧‧Bluetooth transceiver

512‧‧‧ processor

513‧‧‧ memory unit

514‧‧‧Warning device

520‧‧‧ Vehicle control device

521‧‧‧ Vehicle Control Unit

522‧‧‧ input device

523‧‧‧output device

525‧‧‧ camera

600‧‧‧Handheld Bluetooth System

601‧‧‧Bluetooth transceiver

602‧‧‧ processor

603‧‧‧ memory unit

604‧‧‧ input device

605‧‧‧output device

Figure 1 is a flow chart showing the steps of the Bluetooth system of the present invention for determining a distance value to perform an action.

Figure 2 is a flow chart showing the steps of obtaining the distance value by the Bluetooth system of the present invention.

Figure 3 is a flow chart showing the steps of implementing the distance warning method of the Bluetooth system of the present invention.

Figure 4 is a block diagram of the system of the Bluetooth carrier control system of the present invention.

Figure 5 is a block diagram of the system of the handheld Bluetooth system of the control vehicle of the present invention.

Please refer to FIG. 1. FIG. 1 is a flow chart showing the steps of the Bluetooth system of the present invention for measuring a distance value to perform an action. As shown in FIG. 1, the present invention may first perform step 100, that is, set a preset distance value. For example, when the Bluetooth system is manufactured, the preset distance value is set, or the user can set the preset distance value by inputting the device. Next, step 200 can be performed, that is, the distance between the carrier and the handheld device is measured. The vehicle can be, for example, a two-wheeled vehicle, a four-wheeled vehicle, or a second or more mobile vehicle. For example, the mobile vehicle can be, for example, a car, a truck, a bus, a tour bus, a locomotive, a bicycle, or an electric vehicle. ATV or multi-purpose recreational vehicle. Also, the handheld device can be, for example, a cell phone or a key.

Continuingly, the present invention determines and obtains the distance between the carrier and the handheld device by using a Bluetooth system, and the Bluetooth system includes at least a first Bluetooth device and a second Bluetooth device, and the first Bluetooth device and the second device One of the Bluetooth devices is, for example, disposed on a carrier, and the other is disposed, for example, on the handheld device. And, the first Bluetooth device and the second Bluetooth device are paired with each other. Wherein, since any Bluetooth device has a unique address code, the two Bluetooth devices can be paired with each other so that the two Bluetooth devices are paired with each other. In addition, the first Bluetooth device and the second Bluetooth device can be connected to each other, for example, in a point-to-point manner, so that the third party can be transmitted when the data is transmitted, thereby increasing the security and convenience in transmission and pairing. In addition, the Bluetooth system can use the frequency hopping technology and encryption by the advanced encryption standard (AES-128) to further increase the security of transmission and pairing.

Please refer to FIG. 2, which is a flow chart of the steps of obtaining the distance value by the Bluetooth system of the present invention. As shown in FIG. 2, the present invention first performs step 201 when the distance value is obtained, that is, the first Bluetooth device transmits the ranging signal to the second Bluetooth device, so that the second Bluetooth device knows the signal strength of the ranging signal. . The first Bluetooth device and the second Bluetooth device transmit a signal to the other every interval time. Therefore, the signal can be used as a ranging signal. The interval time may be, for example, three seconds, five seconds, ten seconds, or other suitable time. In addition, the ranging signal can also be, for example, a signal with other information, or a signal for measuring the signal strength only for ranging. If the ranging signal is a signal with other information, after receiving the ranging signal, the second Bluetooth device can not only know the signal strength of the ranging signal, but also transmit other information in the ranging signal to and The second Bluetooth device is interconnected or the processor of the second Bluetooth device itself to further process the other information. In addition, the second Bluetooth device can use the signal strength measuring device to learn the ranging signal. Signal strength.

Then, when the second Bluetooth device receives the ranging signal and knows the signal strength of the ranging signal, step 202 can be performed, that is, the second Bluetooth device learns or determines the first Bluetooth according to the strength of the ranging signal. The distance between the device and the second Bluetooth device. For example, the second Bluetooth device can have a comparison table between the signal strength and the distance value. When the second Bluetooth device knows the signal strength, the second Bluetooth device can learn the corresponding distance value by looking up the table. Alternatively, the second Bluetooth device may have a linear or non-linear relationship function between the signal strength and the distance value. For example, after the second Bluetooth device learns the signal strength, the signal strength may be substituted into the relationship function. Calculating the distance value between the first Bluetooth device and the second Bluetooth device. Wherein, because one of the first Bluetooth device and the second Bluetooth device is located on the carrier and the other is located on the handheld device, the distance between the first Bluetooth device and the second Bluetooth device is equivalent to the carrier and the handheld device. The distance value of the device.

Continuing, after the second Bluetooth device knows the distance between the carrier and the handheld device, step 203 may be selectively performed, that is, the second Bluetooth device transmits the distance between the carrier and the handheld device to the first Bluetooth device. The distance value is known to both the first Bluetooth device and the second Bluetooth device. In addition, the second Bluetooth device and the first Bluetooth device can also transmit signals to each other by mutual signals, so that the first Bluetooth device and the second Bluetooth device can measure the signal strength of the signal, and further The distance between the vehicle and the handheld device is separately known or determined. Thereafter, the distance value can be further transmitted to another Bluetooth device, for example, to further confirm whether the distance value is incorrect. For example, if the difference between the distance values respectively learned by the first Bluetooth device and the second Bluetooth device is too large, step 200 may be performed again. On the other hand, if the distance values learned by the first Bluetooth device and the second Bluetooth device are similar or equal, the average of the two distance values may be taken. For the distance between the carrier and the handheld device, or one of the distance values may be the distance between the carrier and the handheld device. Wherein, the determination of whether the difference in distance values described herein is too large may be based on the application purpose of the distance value, and the value of the gap may be separately defined.

After determining the distance between the carrier and the handheld device, step 300 can be performed, that is, the distance value is compared. For example, in step 300, one or both of the first Bluetooth device and the second Bluetooth device may, for example, compare the preset distance value and the distance value between the carrier and the handheld device, or may, for example, Compare the distance values of the vehicle and the handheld device at different times. Moreover, whether step 300 compares the distance value with the preset distance value or compares the distance values at different times, a comparison result can be obtained. Then, one or both of the first Bluetooth device and the second Bluetooth device can perform the step 400 according to the comparison result, that is, perform an action. The action of the execution may be, for example, establishing a connection relationship between the first Bluetooth device and the second Bluetooth device, or may be, for example, alerting the user. In addition, the act of performing may also be, for example, transmitting a message to a carrier or handheld device whereby the carrier or handheld device turns on its particular function or turns off its particular function.

Therefore, because the Bluetooth device transmits a signal to another Bluetooth device that is paired with each other at an interval, the Bluetooth system can use the fixed transmission signal as the ranging signal to determine the relationship between the two Bluetooth devices. Distance value. In addition, the Bluetooth device can also specifically transmit a ranging signal to perform the action of measuring the distance value. The interval may be, for example, the time defined in the Bluetooth technology protocol (IEEE 802.15), and may be any time set by the user or the manufacturer, for example. For example, the interval time can be, for example, three seconds, five seconds, ten seconds, or other suitable time.

Please refer to Figure 4 to Figure 5, and Figure 4 is the Bluetooth Vehicle Control System of the present invention. System block diagram, Figure 5 is a system block diagram of the handheld Bluetooth system of the control vehicle of the present invention. The Bluetooth carrier control system and the handheld Bluetooth system may be paired with each other, for example, and one of them may be, for example, the aforementioned first Bluetooth device, and the other may be, for example, the aforementioned second Bluetooth device. As shown in Figures 4 to 5, wherein the Bluetooth carrier control system 500 can be located, for example, on a carrier, for example, the Bluetooth carrier control system 500 can be located, for example, in a vehicle rear view mirror, a front instrument panel, and a storage device. On the box or other device of the vehicle. Additionally, the handheld Bluetooth system 600 can be, for example, a key or built into a handheld device such as a cell phone. In addition, the present invention can provide power to the Bluetooth carrier control system 500 and the handheld Bluetooth system 600, for example, by a power supply method, for example, solar power supply, hydroelectric power supply, thermal power generation, and wind power generation. Power, battery, power or vibration generate electricity, wireless charging, or other means of generating electricity.

In other words, the Bluetooth carrier control system 500 can have, for example, a car Bluetooth device 510 and a vehicle control device 520 that are electrically connected to each other. The in-vehicle Bluetooth device 510 can include, for example, a Bluetooth transceiver 511, a processor 512, and a memory unit 513 and a warning device 514 electrically coupled to the processor 512. The vehicle control device 520 can be disposed, for example, on a carrier, and the vehicle control device 520 can include, for example, a carrier control unit 521 and an input device 522, an output device 523, and an imaging device electrically coupled to the vehicle control unit 521. 525. The Bluetooth transceiver 511 can wirelessly connect the external device by using Bluetooth technology, for example, to receive a signal transmitted by the external device. Moreover, the external device can be, for example, a handheld Bluetooth system 600 that is paired with the Bluetooth carrier control system 500. Further, the vehicle control unit 521 is disposed on the carrier and controls the carrier.

In addition, the processor 512 is electrically connected to the Bluetooth transceiver 511 and the vehicle control unit 521. . If the Bluetooth carrier control system 500 is the second Bluetooth system, when the Bluetooth transceiver 511 transmits the received signal to the processor 512, the processor 512 first measures the signal strength of the signal, and borrows The signal strength is used to determine the distance between the external device and the carrier. Next, the processor 512 compares the distance value with a preset distance value to obtain a comparison result. The preset distance value can be stored in the memory unit 513, for example, and the memory unit 513 is electrically connected to the processor 512 to provide the preset distance value to the processor 512. Alternatively, the vehicle control unit 521 can be electrically connected to the input device 522, for example, to allow the user to set a preset distance value by using the input device 522, and the preset distance value is further transmitted to the processor 512 via the vehicle control unit 521. . Furthermore, this preset distance value can be, for example, between about 1 meter and 100 meters.

After obtaining the comparison result of the distance values, the processor 512 can respectively transmit the motion signal to the vehicle control unit 521 and the external device by using the comparison result, so that the vehicle control unit 521 and the external device can use the motion signal to Perform an action. For example, when the comparison result is that the preset distance value is greater than the distance value between the carrier and the external device, the external device may establish a connection relationship with the vehicle control unit 521, for example, so that the vehicle control unit 521 controls the carrier selectivity. Take an action. Wherein, the action may be, for example, a function of opening, and the function may be, for example, an anti-theft system for releasing the vehicle, transmitting a vehicle signal to an external device, opening a device inside the carrier, unlocking the door or engine of the carrier, or , alert the user. In addition, when the vehicle is turned on, the vehicle can directly perform the corresponding function, or the open external device can selectively perform the corresponding function. For example, the vehicle control unit 521 can control the locking of the device inside the carrier to open the carrier, so that the external device can be coupled to the vehicle control unit 521 to open the device inside the carrier. In other words, if the vehicle is controlled When the function of the internal device of the unlocking device is not turned on, the external device cannot command the vehicle control unit 521 to turn on the device inside the carrier.

In addition, if the carrier is enabled to be controlled, the external device can establish a connection relationship with the vehicle control unit 521. After the external device is connected to the vehicle control unit 521, the vehicle control unit 521 can control the camera 525 to capture the image and transmit it back to the vehicle control unit 521, and then transmit it to the processor 512 of the Bluetooth device 510. The Bluetooth transceiver 511 is sent to the external device via the Bluetooth transceiver 511. In addition, if the action is to alert the user, the processor 512 can send an alert signal to the alert device 514 built in the Bluetooth device 510, for example, so that the alert device 514, such as a light-emitting component, emits light or flashes to alert the user. Alternatively, a warning device 514, such as a sound component, is sounded to alert the user. In addition, the processor 512 can also send an alert signal to the vehicle control unit 521, for example, after receiving the warning signal, the vehicle control unit 521 sends the warning signal to the output device 523, so that the output device 523 outputs the warning signal. The warning signal can be, for example, an audio signal, a light source signal, or a screen displayed on the output device 523.

In addition, the handheld Bluetooth system 600 can include, for example, a Bluetooth transceiver 601, a processor 602, and a memory unit 603, an input device 604, and an output device 605 that are electrically coupled to the processor 602. The Bluetooth transceiver 601 can be wirelessly coupled to the carrier by, for example, Bluetooth technology to receive a signal transmitted by the carrier. Also, the carrier can have, for example, a Bluetooth carrier control system 500 that is paired with the handheld Bluetooth system 600.

In addition, the processor 602 is electrically connected to the Bluetooth transceiver 601. If the handheld Bluetooth system 600 is the second Bluetooth device, when the Bluetooth transceiver 601 transmits the received signal to the processor 602, the processor 602 first The signal strength of the signal is measured, and the distance between the handheld device and the carrier is determined by the signal strength. then The processor 602 compares the distance value with a preset distance value to obtain a comparison result. The preset distance value may be stored in the memory unit 603, for example, when the processor 602 needs to compare the distance value with the preset distance value, the memory unit 603 provides the preset distance value to the processor 602. Alternatively, the user is allowed to set the preset distance value by using the input device 604, and the preset distance value is further transmitted to the processor 602 via the input device 604. Wherein, the preset distance value may be, for example, between about 1 meter and 100 meters.

After obtaining the comparison result of the distance values, the processor 602 further compares the result, for example, respectively, transmitting the motion signal to the vehicle and the output device 605, so that the vehicle performs an action by using the motion signal, or the output device. The 605 outputs a warning signal or other signal by means of the action signal. For example, when the comparison result is that the preset distance value is greater than the distance between the handheld device and the carrier, the handheld device can establish a connection relationship with the carrier, for example, to control the vehicle to perform an action, or can control the load. With a function to open. The action or function may be, for example, the anti-theft system of the vehicle, the transmission of the vehicle signal to the handheld device, the opening of the device inside the vehicle, or the unlocking of the vehicle door or engine. In addition, the processor 602 can also send an alert signal to the output device 605, for example, to cause the output device 605 to illuminate, flash, emit a sound, display a graphic, display text, display an image, or vibrate to alert the user. In addition, the output device 605 can also output an alert signal to alert or alert the user. The output device 605 can be, for example, a light source, a speaker, a screen, a vibration device, or a combination of the above components. Also, the screen can display, for example, graphics, text, images, or other objects that can be displayed on the screen.

Please refer to FIG. 3, which is a flow chart of the implementation steps of the distance warning method for the Bluetooth system of the present invention. As shown in Figures 1 to 5, the present invention is applied The Bluetooth system may include a first Bluetooth device and a second Bluetooth device, and one of the first Bluetooth device and the second Bluetooth device is disposed on the carrier, and the other is disposed on the handheld device, and the user is located on the carrier or Carry a handheld device. Therefore, the present invention can determine and obtain the distance value between the carrier and the handheld device by using the Bluetooth system, and determine whether the carrier and the handheld device are too far away according to the distance value, and if too far, the Bluetooth system to which the present invention is applied. A warning signal can be issued to alert the user that the vehicle is too far away from the handheld device.

Continuingly, the distance warning method of the Bluetooth system of the present invention is, for example, first setting a preset distance value in step 100, and then determining and obtaining the distance value between the carrier and the handheld device in step 200, and then performing the steps. 300 compares the measured distance value with the set preset distance value to obtain a comparison result. The comparison result is that the distance value is greater than the preset distance value or less than the preset distance value. Finally, different actions are performed in step 400 in accordance with the comparison results of step 300. For example, when the comparison result is that the distance value is less than the preset distance value, the carrier and the handheld device exchange messages to synchronously update the state of the carrier and the handheld device. When the comparison result is that the distance value is greater than the preset distance value, the distance between the vehicle and the handheld device is too far away. At this time, the Bluetooth system sends a warning signal to alert the user that the distance from the vehicle is too far away. Or, the user has lost the handheld device.

In particular, the distance warning method of the present invention for applying the Bluetooth system can, for example, first obtain the distance value between the carrier and the handheld device (step 220). For example, step 220 may first set a preset distance value (step 100), and the preset distance value may be stored in advance in the memory unit 513 of the in-vehicle Bluetooth device 510 or in the memory unit 603 of the handheld Bluetooth system 600, for example. Alternatively, the preset distance value can be set by the user using the input device 522 or the input device 604. Wherein, the preset distance value may be, for example, about 1 Between meters and 100 meters.

After or at the same time as step 100, the distance value between the carrier and the handheld device can be determined, for example, using one or both of processor 512 and processor 602 (step 200). The vehicle can be, for example, a two-wheeled vehicle, a four-wheeled vehicle, or a second or more mobile vehicle, and the handheld device can be, for example, a mobile phone or a key. In particular, the handheld device can have, for example, a handheld Bluetooth system 600, and the carrier can have, for example, a Bluetooth carrier control system 500, and the Bluetooth carrier control system 500 and the handheld Bluetooth system 600 are paired with each other. Therefore, the processor 512 determines the distance between the carrier and the handheld device. For example, the Bluetooth transceiver 601 can transmit a signal to the Bluetooth transceiver 511. When the Bluetooth transceiver 511 receives the signal, the signal is transmitted. To processor 512. The signal may be, for example, a signal transmitted by the Bluetooth system at intervals, or specifically a ranging signal or a connection request signal. Thereafter, the processor 512 determines the distance between the carrier and the handheld device based on the signal strength of the signal. The processor 512 can then transmit the distance value to the Bluetooth transceiver 601 via the Bluetooth transceiver 511. If the Bluetooth transceiver 601 receives the distance value, the Bluetooth transceiver 601 transmits the distance value to the processor 602, so that both the Bluetooth carrier control system 500 and the handheld Bluetooth system 600 know the distance value.

Then, after obtaining the distance value and the preset distance value, the processor 512 and one of the processors 602 or both determine whether the learned distance value is greater than the preset distance value (step 321), and if not, the vehicle The message is exchanged with the handheld device (step 421) to synchronously update the status of the carrier and the handheld device. For example, the carrier and the handheld device can exchange information with each other by, for example, the Bluetooth transceiver 511 and the Bluetooth transceiver 601, wherein the message can be, for example, the locked state of the vehicle door, the speed of the vehicle, the amount of fuel used, or the like. The state may also be, for example, the state of charge of the handheld device or other state.

In other words, if the Bluetooth system determines in step 321 that the distance between the carrier and the handheld device is greater than the preset distance value, the distance between the carrier and the handheld device is too large, so the Bluetooth system sends a warning signal to alert the use. By. The Bluetooth system can send an alert signal, for example, by the alert device 514 of the in-vehicle Bluetooth device 510, the output device 523 of the vehicle control device 520, or the output device 605 of the handheld Bluetooth system 600, and the alert signal can be, for example, an optical signal or a sound. Signals, vibration signals, graphic signals, text signals, video signals or other signals that can be used to alert the user.

For example, the vehicle control unit 521 can determine whether the vehicle is in an activated state (step 422), and if so, represents the user with the vehicle. When the processor 512 determines that the distance between the carrier and the handheld device is greater than the preset distance value, the distance between the handheld device and the user is greater than the preset distance value, and the carrier can be used, for example, by the alert device 514. Or the output device 523 sends an alert signal to alert the user (step 423). When the user notices the warning signal, the user can reverse or change direction to find the handheld device, and because the Bluetooth transceiver 511 of the Bluetooth system and the Bluetooth transceiver 601 transmit signals to each other at intervals, the processor 602. And one or both of the processors 512, whether the distance value between the carrier and the handheld device is less than the attention distance value can be determined at intervals (step 322). The attention distance value may be stored in the memory unit 513 or the memory unit 603, for example, or the user may set the attention distance value by using the input device 522. Furthermore, this attention distance value can be, for example, between about 1 and 10 meters.

In other words, when the processor 602 determines that the distance value is still greater than the attention distance value, the handheld device is still on standby. When the processor 602 determines that the distance between the carrier and the handheld device is less than the attention distance value, the handheld device can issue an attention signal (step 424) by the output device 605 to attract the user. The attention signal can be, for example, optical information. Number, voice signal or other signal that can be used to attract users.

In addition, if the user is not with the carrier, that is, the vehicle control unit 521 determines in step 422 that the carrier is in a stationary state, but if the processor 512 determines that the distance between the carrier and the handheld device is greater than a preset distance value At this time, the handheld device can alert the user by, for example, issuing an alert signal by the output device 605 (step 425). Moreover, after the user notices the warning signal, the request signal can be transmitted to the vehicle control unit 521, for example, so that the vehicle control unit 521 transmits the status signal of the vehicle to the handheld device (step 426), so that the user knows The status of the vehicle. The status signal may include, for example, a status status of the vehicle, and the status status of the vehicle may be, for example, a locked state of the vehicle door. In addition, the vehicle control unit 521 can also transmit the image captured by the camera 525 to the handheld device as a status signal of the carrier. In addition, when the vehicle control unit 521 determines that the vehicle is in a stationary state, the status signal of the vehicle can be immediately transmitted to the handheld device. The status signal is, for example, a warning signal used by the handheld device to alert the user.

Therefore, one of the remote warning methods of the Bluetooth system of the present invention is characterized in that the distance between the carrier and the handheld device is determined by using a Bluetooth system.

Another feature of the distance warning method for applying the Bluetooth system of the present invention is that the distance value is greater than the preset distance value by the Bluetooth system, and the user is alerted to the distance of the vehicle from being too large or promptly warning the user that the key is lost. .

The above is intended to be illustrative only and not limiting. Any equivalent modifications or alterations to the spirit and scope of the invention are intended to be included in the scope of the appended claims.

220-426‧‧‧Steps

Claims (9)

A distance warning method for applying a Bluetooth system includes at least the following steps: using the Bluetooth system to obtain a distance value between a carrier and a handheld device, wherein the Bluetooth system includes a first Bluetooth device and a second Bluetooth device. One of the first Bluetooth device and the second Bluetooth device is disposed on the carrier, the other is disposed on the handheld device, and a user is located on the carrier or carries the handheld device; and utilizing the Bluetooth The system determines whether the distance value is greater than a preset distance value. When the distance value is greater than the preset distance value, the Bluetooth system further determines whether the vehicle is in an activated state. If yes, the vehicle sends a warning signal to Alerting the user, if not, the handheld device sends the warning signal to alert the user; when the distance value is less than the preset distance value, the carrier and the handheld device exchange a message to update the load With the state of the handheld device. The distance warning method for applying the Bluetooth system according to claim 1, wherein the step of obtaining the distance between the vehicle and the handheld device further comprises the following steps: the first Bluetooth device transmits a ranging signal The second Bluetooth device is configured to enable the second Bluetooth device to know the signal strength of the ranging signal; the second Bluetooth device learns the distance value according to the signal strength; and the second Bluetooth device transmits the distance value And to the first Bluetooth device, so that the first Bluetooth device knows the distance value. The distance warning method for applying the Bluetooth system according to claim 1, wherein the Bluetooth system further determines the vehicle when the vehicle is in the activated state. Whether the distance between the handheld devices is less than a caution distance value, and if so, the handheld device sends a attention signal. A distance warning method for applying a Bluetooth system according to claim 1, wherein the carrier transmits a status signal to the handheld device when the carrier is in a stationary state. The distance warning method for applying the Bluetooth system as described in claim 4, wherein the status signal is the warning signal. The distance warning method for applying the Bluetooth system as described in claim 1 is wherein the warning signal is an optical signal, an audio signal, a vibration signal, a graphic signal, a text signal or an image signal. The distance warning method for applying the Bluetooth system according to claim 1, wherein the Bluetooth system further has a memory unit, and the preset distance value is stored in the memory unit. The distance warning method for applying the Bluetooth system according to claim 1, wherein the Bluetooth system further has an input device for the user to set the preset distance value by using the input device. The distance warning method for applying the Bluetooth system according to claim 1, wherein the carrier is one of two, four or more rounds of mobile vehicles, and the handheld device is a mobile phone or a key.