CN111508197A - Anti-lost multiple early warning method and system - Google Patents
Anti-lost multiple early warning method and system Download PDFInfo
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- CN111508197A CN111508197A CN202010322021.0A CN202010322021A CN111508197A CN 111508197 A CN111508197 A CN 111508197A CN 202010322021 A CN202010322021 A CN 202010322021A CN 111508197 A CN111508197 A CN 111508197A
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0233—System arrangements with pre-alarms, e.g. when a first distance is exceeded
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0225—Monitoring making use of different thresholds, e.g. for different alarm levels
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/0266—System arrangements wherein the object is to detect the exact distance between parent and child or surveyor and item
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/028—Communication between parent and child units via remote transmission means, e.g. satellite network
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B21/00—Alarms responsive to a single specified undesired or abnormal condition and not otherwise provided for
- G08B21/02—Alarms for ensuring the safety of persons
- G08B21/0202—Child monitoring systems using a transmitter-receiver system carried by the parent and the child
- G08B21/028—Communication between parent and child units via remote transmission means, e.g. satellite network
- G08B21/0283—Communication between parent and child units via remote transmission means, e.g. satellite network via a telephone network, e.g. cellular GSM
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/016—Personal emergency signalling and security systems
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/08—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using communication transmission lines
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B25/00—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems
- G08B25/01—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium
- G08B25/10—Alarm systems in which the location of the alarm condition is signalled to a central station, e.g. fire or police telegraphic systems characterised by the transmission medium using wireless transmission systems
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- G—PHYSICS
- G08—SIGNALLING
- G08B—SIGNALLING OR CALLING SYSTEMS; ORDER TELEGRAPHS; ALARM SYSTEMS
- G08B7/00—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00
- G08B7/06—Signalling systems according to more than one of groups G08B3/00 - G08B6/00; Personal calling systems according to more than one of groups G08B3/00 - G08B6/00 using electric transmission, e.g. involving audible and visible signalling through the use of sound and light sources
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- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Business, Economics & Management (AREA)
- Health & Medical Sciences (AREA)
- Emergency Management (AREA)
- General Health & Medical Sciences (AREA)
- Child & Adolescent Psychology (AREA)
- Engineering & Computer Science (AREA)
- Computer Networks & Wireless Communication (AREA)
- Computer Security & Cryptography (AREA)
- Telephonic Communication Services (AREA)
- Telephone Function (AREA)
- Alarm Systems (AREA)
Abstract
The invention discloses a multiple early warning method and a multiple early warning system for preventing loss, which relate to the technical field of early warning for loss and solve the technical problems that a plurality of guardians cannot simultaneously receive early warning and scenic spots cannot receive early warning. The method and the system combine hardware equipment and software for use, and can be connected with a plurality of guardians, and the guardians can select different early warning conditions in the control system as required; in addition, when the early warning of the guardian is realized, the early warning can be synchronously realized in the scenic spot, so that the early warning for preventing the lost is further enhanced.
Description
Technical Field
The disclosure relates to the technical field of early warning of loss, in particular to a multiple early warning method and a multiple early warning system for preventing loss.
Background
Present tourist attraction sight can all provide sight spot tourism APP, believe public number a little or believe little procedure a little, and some sight areas still can provide children and prevent equipment of wandering away, for example intelligent wrist-watch (can fix a position and make a telephone call), but many people take children to go out when swimming, can't accomplish to prevent equipment of wandering away and many people have the effect of linking, can't prevent the early warning of wandering away to many people, and prevent that equipment of wandering away can not carry out the early warning to the sight area.
Disclosure of Invention
The utility model provides a multiple early warning method and system for preventing missing, the technical purpose is that: when the lost condition in the scenic spot is possible to occur, the alarm is sent to all guardians simultaneously, and the alarm can be automatically sent to the scenic spot simultaneously.
The technical purpose of the present disclosure is achieved by the following technical solutions:
an anti-lost multiple early warning method comprises the following steps:
the control system sets a second early warning condition;
the control system, the anti-lost equipment and the mobile terminal are connected;
the mobile terminal sets a first early warning condition or selects a second early warning condition;
when the first early warning condition is triggered by the anti-lost device, the mobile terminal sends an alarm;
and when the second early warning condition is triggered by the anti-lost equipment, the control system and the mobile terminal send out an alarm at the same time.
Further, the first warning condition includes a first warning time and a first warning distance, and the first warning condition includes:
the distance between the anti-lost device and the mobile terminal exceeds a first early warning distance;
or the time that the lost prevention equipment and the mobile terminal exceed the first early warning distance exceeds the first early warning time;
the second early warning condition comprises a second early warning time and a second early warning distance, and the second early warning condition is as follows: the time that the lost prevention equipment and the mobile terminal exceed the second early warning distance exceeds the second early warning time;
the first early warning time is less than or equal to the second early warning time, and the first early warning distance is less than or equal to the second early warning distance.
Further, the number of the mobile terminals is N, N is greater than or equal to 1, and when N >1, the first early warning condition set by the mobile terminal further includes:
the distance between any one mobile terminal and the anti-lost device is larger than the first early warning distance;
or the time exceeding the first early warning distance between any one of the mobile terminals and the anti-lost device exceeds the first early warning time;
or the distances between the N mobile terminals and the anti-lost equipment are all larger than the first early warning distance;
or the time exceeding the first early warning distance between the N mobile terminals and the anti-lost device exceeds the first early warning time;
and triggering the first early warning condition, and simultaneously sending out an alarm by the N mobile terminals.
Further, when N >1, the second warning condition set by the control system further includes:
the time that the distance between any one mobile terminal and the anti-lost device exceeds the second early warning distance exceeds the second early warning time;
or the distances between the N mobile terminals and the anti-lost device are all larger than the second early warning distance, and the time between the N mobile terminals and the anti-lost device, which exceeds the second early warning distance, does not exceed the second early warning time;
or the time that the distances between the N mobile terminals and the anti-lost equipment are larger than the second early warning distance exceeds the second early warning time;
and triggering the second early warning condition, and then sending out an alarm by the N mobile terminals and the control system at the same time.
Further, after the alarm is sent out, the anti-lost device sends positioning to the mobile terminal and the control system.
An anti-lost multiple warning system comprising:
the control system sets a second early warning condition and establishes connection with the anti-lost equipment and the mobile terminal; when the second early warning condition is triggered by the anti-lost equipment, an alarm is sent out;
the anti-lost equipment is connected with the control system and the mobile terminal;
and the mobile terminal sets a first early warning condition or selects a second early warning condition, and gives an alarm when the first early warning condition or the second early warning condition is triggered by the anti-lost equipment.
Further, the mobile terminal comprises a first setting unit, the first setting unit sets a first early warning condition, the first early warning condition comprises first early warning time and first early warning distance, and the first early warning condition comprises:
the distance between the anti-lost device and the mobile terminal exceeds a first early warning distance;
or the time that the lost prevention equipment and the mobile terminal exceed the first early warning distance exceeds the first early warning time;
the control system comprises a second setting unit, the second setting unit sets a second early warning condition, the second early warning condition comprises second early warning time and second early warning distance, and the second early warning condition is as follows: the time between the anti-lost device and the mobile terminal, which exceeds the second early warning distance, exceeds the second early warning time;
the first early warning time is less than or equal to the second early warning time, and the first early warning distance is less than or equal to the second early warning distance.
Further, the mobile terminal further includes a third setting unit, where the number of the mobile terminals is N, N is greater than or equal to 1, and when N >1, the first warning condition set by the third setting unit further includes:
the distance between any one mobile terminal and the anti-lost device is larger than the first early warning distance;
or the time exceeding the first early warning distance between any one of the mobile terminals and the anti-lost device exceeds the first early warning time;
or the distances between the N mobile terminals and the anti-lost equipment are all larger than the first early warning distance;
or the time exceeding the first early warning distance between the N mobile terminals and the anti-lost device exceeds the first early warning time;
and triggering the first early warning condition, and simultaneously sending out an alarm by the N mobile terminals.
Further, the control system includes a fourth setting unit, and when N >1, the second warning condition set by the fourth setting unit further includes:
the time that the distance between any one mobile terminal and the anti-lost device exceeds the second early warning distance exceeds the second early warning time;
or the distances between the N mobile terminals and the anti-lost device are all larger than the second early warning distance, and the time between the N mobile terminals and the anti-lost device, which exceeds the second early warning distance, does not exceed the second early warning time;
or the time that the distances between the N mobile terminals and the anti-lost equipment are larger than the second early warning distance exceeds the second early warning time;
and triggering the second early warning condition, and then sending out an alarm by the N mobile terminals and the control system at the same time.
Further, the anti-lost device, the mobile terminal and the control system all comprise a positioning unit and a timer.
The beneficial effect of this disclosure lies in: according to the anti-lost multiple early warning method and system, the anti-lost device is connected with the control system and the mobile terminal, the mobile terminal and the control system are respectively provided with early warning conditions, and when the anti-lost device triggers the early warning conditions, the mobile terminal and the control system give out an alarm according to different early warning conditions. The method and the system combine hardware equipment and software for use, and can be connected with a plurality of guardians, and the guardians can select different early warning conditions in the control system as required; in addition, when the early warning of the guardian is realized, the early warning can be synchronously realized in the scenic spot, so that the early warning for preventing the lost is further enhanced.
Drawings
FIG. 1 is a flow chart of the disclosed method;
FIG. 2 is a flow chart of an embodiment of the disclosed method;
FIG. 3 is a flowchart of an embodiment of the disclosed method;
fig. 4 is a schematic diagram of the disclosed system.
Detailed Description
The technical scheme of the disclosure will be described in detail with reference to the accompanying drawings. In the description of the present disclosure, it is to be understood that the terms "first", "second", "third", and "fourth" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implying any number of technical features indicated, but merely as differentiating between different components.
Fig. 1 is a schematic flow chart of the method of the present disclosure, and as shown in fig. 1, the loss prevention device is connected to both the control system and the mobile terminal, both the mobile terminal and the control system can set an early warning condition, the mobile terminal can also select the early warning condition, and after the loss prevention device triggers the early warning condition, the mobile terminal sends out an alarm or the mobile terminal and the control system send out an alarm at the same time.
Setting the early warning time W100 to be 60 minutes (the time can be set), and setting the early warning mode to be ringing or flashing of signal lamps at the background of the scenic spot.
Tourists (guardians) rent the anti-lost equipment (escort) to the tourist center, and after renting the equipment, the equipment of just renting is bound at the equipment center of the scenic spot APP or the scenic spot WeChat public number, and the tourists (guardians) of the same trip can all bind the same anti-lost equipment. After the tourists finish playing, the tourists click the return anti-lost equipment at the center of the equipment, and the deposit is returned after the return of the anti-lost equipment. The visitors (guardians) in the same row only need to click the return anti-lost device by one person, and other guardians do not need to operate.
When only one guardian exists, the time that the guardian leaves the guardian and exceeds the second early warning distance exceeds the second early warning time, and the control system and the mobile terminal start early warning at the same time. When the number of the guardians is at least two, and the time that the guardianed person leaves all the guardians and exceeds the second early warning distance exceeds the second early warning time, all the mobile terminals and the control system simultaneously send out an alarm; the alternative early warning condition is that or, the situation that the monitored person leaves any guardian for a distance exceeding the early warning distance is indicated, and early warning is started.
If the guardian needs to reset the early warning condition, the early warning condition (including a first early warning distance and a first early warning time, obviously, the early warning distance and the early warning time set by the guardian are certainly within the early warning distance and the early warning time set by the scenic spot) can be reset at the mobile terminal of the guardian, and when only one guardian exists, the distance from the guardian to the guardian of the monitored person exceeds the first early warning distance, or the time when the distance from the guardian to the guardian exceeds the first early warning distance exceeds the first early warning time, the mobile terminal immediately sends out an early warning; when at least two guardians exist, the distance between the person under guardianship and any one guardian is larger than a first early warning distance, or the distance between the person under guardianship and any one guardian is larger than the first early warning distance and exceeds first early warning time, all the mobile terminals send out early warning.
After the guardian selects the early warning condition or sets the early warning condition (early warning time W200, early warning distance D100 and early warning mode), storing the early warning setting, and opening the mobile phone ringing mode, wherein the mobile phone ringing mode needs to be consistent with the early warning mode, the binding of the equipment is successful, otherwise, the binding of the equipment fails; the early warning mode comprises ringing, vibration and ringing and vibration time.
Fig. 2 is a flowchart of a first embodiment of the disclosure, as shown in fig. 2, a guardian a reports map positioning C100, a person under guardianship reports map positioning C101, and a distance D101 between C100 and C101 is obtained through calculation; meanwhile, the guardian B reports map positioning C102, and the distance D102 between C101 and C102 is obtained through calculation; and comparing whether D101 and D102 are greater than the early warning distance D100, and when both are greater than the early warning distance D100, the early warning is regarded as primary early warning.
The message prompts the guardian A and the guardian B, and the timer starts to time the leaving time W300; the monitored person continuously reports to a map location C103, the guardian A and the guardian B respectively report to the map locations C104 and C105, the distance between the C103 and the C104 is D103, the distance between the C103 and the C105 is D104, the comparison result shows that both the D103 and the D104 are greater than an early warning distance D100, the timer continuously accumulates a timing W300, and the process is repeated in this way, when the leaving time W300 of the timer is greater than the early warning time W200, a middle-level early warning is sent out, the mobile phones of the guardian A and the guardian B vibrate and ring down, the ring down time is 30s, meanwhile, the location of the monitored person is sent to the guardian A and the guardian B, and a scenic area alarm call is displayed. When the timer leaving time W300 is greater than the scenic spot early warning time W100, advanced early warning is carried out, the mobile phones of the guardian A and the guardian B vibrate and ring, and the ring time is 30 s; and the scenic spot early warning center or the tourist center rings or signals the light, and simultaneously sends the location of the person under guardianship to the guardian A, the guardian B and the scenic spot early warning center.
Fig. 3 is a schematic flow chart of an embodiment of the method of the present disclosure, and as shown in fig. 3, a guardian a reports map positioning C106, a monitored person reports map positioning C107, and a distance D105 between C106 and C107 is obtained through calculation; meanwhile, the guardian B reports map positioning C108, and the distance D106 between C107 and C108 is obtained through calculation; and comparing whether D105 and D106 are greater than the early warning distance D100 or not, and when D105 or D106 is greater than the early warning distance D100, sending out a primary early warning, prompting the guardian A and the guardian B by a message, and starting timing the leaving time W301 by a timer.
The monitored person continuously reports map positioning C109, the guardian A and the guardian B respectively report map positioning C110 and C111, when the distance between C109 and C110 is D107, the distance between C109 and C111 is D108, and any one of D107 and D108 is larger than the early warning distance D100, the timer continuously accumulates timing W301, and in such a cycle, when the leaving time W301 of the timer is larger than the early warning time W200, a middle-level early warning is sent out, the guardian A and the guardian B vibrate and ring with mobile phones, the ring time is 30s, meanwhile, the positioning of the monitored person is sent to the guardian A and the guardian B, and the scenic spot alarm phone is displayed.
When the timer leaving time W301 is greater than the scenic spot early warning time W100, sending out advanced early warning, wherein the mobile phones of the guardian A and the guardian B vibrate and ring for 30 s; the scenic spot early warning center or the tourist center rings or signals the light, sends guardian's location simultaneously to guardian A, guardian B and scenic spot early warning center.
Fig. 4 is a schematic diagram of the system of the present disclosure, where the multiple early warning system of the present disclosure includes a mobile terminal, a control system, and an anti-lost device, which are connected to each other, and each of the mobile terminal, the control system, and the anti-lost device includes a positioning unit and a timer, and the mobile terminal, the control system, and the anti-lost device are connected to each other through a wireless network or a 4G network or a 5G network. The mobile terminal comprises a mobile phone, a notebook computer, a tablet computer and the like, and the control system can be an independent system, and can also be a WeChat public account or a mobile phone APP and the like. In addition, the mobile terminal comprises a first setting unit and a third setting unit, and the control system comprises a second setting unit and a fourth setting unit.
The foregoing is an exemplary embodiment of the present disclosure, and the scope of the present disclosure is defined by the claims and their equivalents.
Claims (10)
1. An anti-lost multiple early warning method is characterized by comprising the following steps:
the control system sets a second early warning condition;
the control system, the anti-lost equipment and the mobile terminal are connected;
the mobile terminal sets a first early warning condition or selects a second early warning condition;
when the first early warning condition is triggered by the anti-lost device, the mobile terminal sends an alarm;
and when the second early warning condition is triggered by the anti-lost equipment, the control system and the mobile terminal send out an alarm at the same time.
2. The multiple pre-warning method for preventing loss of sight of claim 1, wherein the first pre-warning condition comprises a first pre-warning time and a first pre-warning distance, and wherein the first pre-warning condition comprises:
the distance between the anti-lost device and the mobile terminal exceeds a first early warning distance;
or the time that the lost prevention equipment and the mobile terminal exceed the first early warning distance exceeds the first early warning time;
the second early warning condition comprises a second early warning time and a second early warning distance, and the second early warning condition is as follows: the time that the lost prevention equipment and the mobile terminal exceed the second early warning distance exceeds the second early warning time;
the first early warning time is less than or equal to the second early warning time, and the first early warning distance is less than or equal to the second early warning distance.
3. The multiple warning method for preventing loss of person as claimed in claim 2, wherein the number of the mobile terminals is N, N is greater than or equal to 1, and when N >1, the first warning condition set by the mobile terminal further includes:
the distance between any one mobile terminal and the anti-lost device is larger than the first early warning distance;
or the time exceeding the first early warning distance between any one of the mobile terminals and the anti-lost device exceeds the first early warning time;
or the distances between the N mobile terminals and the anti-lost equipment are all larger than the first early warning distance;
or the time exceeding the first early warning distance between the N mobile terminals and the anti-lost device exceeds the first early warning time;
and triggering the first early warning condition, and simultaneously sending out an alarm by the N mobile terminals.
4. The multiple warning method for preventing the loss of person as claimed in claim 3, wherein when N >1, the second warning condition set by the control system further comprises:
the time that the distance between any one mobile terminal and the anti-lost device exceeds the second early warning distance exceeds the second early warning time;
or the distances between the N mobile terminals and the anti-lost device are all larger than the second early warning distance, and the time between the N mobile terminals and the anti-lost device, which exceeds the second early warning distance, does not exceed the second early warning time;
or the time that the distances between the N mobile terminals and the anti-lost equipment are larger than the second early warning distance exceeds the second early warning time;
and triggering the second early warning condition, and then sending out an alarm by the N mobile terminals and the control system at the same time.
5. The multiple pre-warning method against loss of sight of claim 4, wherein the device against loss of sight sends a location to the mobile terminal and the control system after an alarm is issued.
6. An anti-lost multiple early warning system, comprising:
the control system sets a second early warning condition and establishes connection with the anti-lost equipment and the mobile terminal; when the second early warning condition is triggered by the anti-lost equipment, an alarm is sent out;
the anti-lost equipment is connected with the control system and the mobile terminal;
and the mobile terminal sets a first early warning condition or selects a second early warning condition, and gives an alarm when the first early warning condition or the second early warning condition is triggered by the anti-lost equipment.
7. The multiple warning system of preventing wandering away of claim 6, wherein the mobile terminal comprises a first setting unit, the first setting unit sets a first warning condition, the first warning condition comprises a first warning time and a first warning distance, and the first warning condition comprises:
the distance between the anti-lost device and the mobile terminal exceeds a first early warning distance;
or the time that the lost prevention equipment and the mobile terminal exceed the first early warning distance exceeds the first early warning time;
the control system comprises a second setting unit, the second setting unit sets a second early warning condition, the second early warning condition comprises second early warning time and second early warning distance, and the second early warning condition is as follows: the time between the anti-lost device and the mobile terminal, which exceeds the second early warning distance, exceeds the second early warning time;
the first early warning time is less than or equal to the second early warning time, and the first early warning distance is less than or equal to the second early warning distance.
8. The multiple warning system of claim 7, wherein the mobile terminal further includes a third setting unit, the number of the mobile terminals is N, N is greater than or equal to 1, and when N >1, the first warning condition set by the third setting unit further includes:
the distance between any one mobile terminal and the anti-lost device is larger than the first early warning distance;
or the time exceeding the first early warning distance between any one of the mobile terminals and the anti-lost device exceeds the first early warning time;
or the distances between the N mobile terminals and the anti-lost equipment are all larger than the first early warning distance;
or the time exceeding the first early warning distance between the N mobile terminals and the anti-lost device exceeds the first early warning time;
and triggering the first early warning condition, and simultaneously sending out an alarm by the N mobile terminals.
9. The multiple warning system of preventing wandering off of claim 8, wherein the control system includes a fourth setting unit, and when N >1, the second warning condition set by the fourth setting unit further includes:
the time that the distance between any one mobile terminal and the anti-lost device exceeds the second early warning distance exceeds the second early warning time;
or the distances between the N mobile terminals and the anti-lost device are all larger than the second early warning distance, and the time between the N mobile terminals and the anti-lost device, which exceeds the second early warning distance, does not exceed the second early warning time;
or the time that the distances between the N mobile terminals and the anti-lost equipment are larger than the second early warning distance exceeds the second early warning time;
and triggering the second early warning condition, and then sending out an alarm by the N mobile terminals and the control system at the same time.
10. The multiple warning system of loss prevention of claim 8, wherein the loss prevention device, the mobile terminal and the control system each comprise a positioning unit and a timer.
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| CN202010322021.0A CN111508197A (en) | 2020-04-22 | 2020-04-22 | Anti-lost multiple early warning method and system |
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