JPH08214933A - Loss/burglar-proof device for property - Google Patents

Abstract

PURPOSE: To realize a low power consumption and prevent unauthorized use by turning off the power with a switch when a property is on the device and by disabling the alarm only when an ID code is accepted by a code identification means. CONSTITUTION: When initialized, a microprocessor 44 reads an ID code of its own receiver from an ID code generating circuit 45 and stores it in the internal memory. When the ID code is not identified from a received signal for a certain time or both ID codes are not identified with each other, the microprocessor 44 orders a buzzer 14 to generate a burglary alarm through a volume control 13. This prevents an alarm due to mis-operation and unauthorized use. A carrying handle switch 15 is a switch which is turned on only when a bag is lifted, so power is not consumed when a bag is on the device. The microprocessor 44 applies power to a transistor 50 only when an ID code is read and stops the power after the ID code is read so as not to consume power by the ID code generating circuit 45.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to the prevention of theft and loss of portable items, particularly bags and baggage.

[0002]

2. Description of the Related Art Conventionally, various proposals have been made regarding prevention of misplacement and theft of portable objects such as bags. As one of the methods, there is one that uses transmission and reception of radio waves.

For example, in Japanese Utility Model Publication No. 60-125918, Japanese Utility Model Publication No. 62-119832, and Japanese Utility Model Publication No. 1-81920, one of a portable object and a portable person has a transmitter and the other has a receiver. In addition, there is disclosed a device which issues a warning such as a buzzer sound when the reception level of the radio wave emitted by the transmitter at the receiver becomes equal to or lower than a predetermined level. According to this, when the portable object is separated from the portable person by a predetermined distance or more, the warning of the portable person can be called by an alarm.

Further, Japanese Patent Laid-Open No. 2-71709 discloses that a transmitter in a bag always transmits a signal of a specific frequency to a receiver carried by a bag carrier, and when the bag is lifted, the transmission is interrupted. Discloses a device that detects this interruption on the receiver side and issues an alarm by a buzzer. The device described in this publication requires a manual switch operation so that the buzzer does not sound when the wearer lifts the bag, which is troublesome. On the other hand, the devices described in the above-mentioned other publications issue an alarm based on the distance between the portable object and the carrier, so that there is no such problem when the carrier itself lifts the bag.

[0005]

By the way, the transmitter and the receiver in each of the above-mentioned devices are usually carried, and a battery must be used as an operating power source. Therefore, it is important to reduce the power consumption in order to prolong the battery life.

However, it cannot be said that the prior arts described in each of the above-mentioned publications give sufficient consideration to that point.

In order to reduce the power consumption of the transmitter, in Japanese Utility Model Laid-Open No. 5-21725, an intermittent power supply circuit is provided in the transmitter to intermittently transmit a signal, and the receiver side An apparatus is disclosed in which a signal level obtained by detecting and shaping an outgoing signal is compared with a previous signal level and an alarm is issued when the two differ.

According to this device, the power consumption of the transmitter can be reduced, but the receiver is always in the power supply conduction state, and the power reduction is not particularly considered.

Furthermore, in recent years, while various electromagnetic waves have been flying around both indoors and outdoors, the signal transmitted from this type of transmitter is a relatively weak radio wave, and a type for detecting a signal level drop and issuing an alarm. In the case of the receiver, there is a possibility that the alarm may be missed when the alarm should be issued due to a malfunction due to noise or the like. It is also conceivable that the owner of the same type of device may intentionally suppress the alarm of the receiver of another person's portable object by using his own transmitter for an unauthorized purpose.

From the above viewpoints, the present invention has an object to provide a device for preventing theft and loss of a portable object which can reduce power consumption including a receiver.

Another object of the present invention is to provide a device for preventing theft and loss of a portable object which can prevent malfunction due to noise and the like and can cope with illegal use of a transmitter.

[0012]

In order to achieve the above object, a device for preventing theft and loss of a portable object according to the present invention has one of a battery-powered transmitter and a receiver attached to the portable object and the other one. In a device for preventing theft and loss of a portable object, which is carried by a carrier and which detects a decrease in the level of radio waves received from the transmitter in the receiver, the transmitter transmits an oscillation signal of a predetermined frequency. The generated oscillation signal generation means, the code generation means for periodically generating the serial ID code, the serial ID code generated by the code generation means, the oscillation signal is modulated, and the modulated signal is transmitted as a radio wave. The receiver includes a code storage unit that stores an ID code, a receiving unit that receives the radio wave from the transmitter, and a receiving unit that receives the electric wave. And code recognition means for the electric wave reading the serial ID code, I of the ID code is recognized by the code recognition means in said code storing means
A predetermined alarm when the ID code cannot be recognized by the code comparing means for comparing with the D code and the code recognizing means, or when the comparison result does not match even if the ID code can be recognized. And an alarm generating means for emitting.

In this device, the portable object is preferably of a type mounted on the ground, floor, etc., the receiver is attached to the portable object, and the receiver is mounted on the portable object. It has a switch means for shutting off its own operating power supply while it is placed.

According to another aspect of the present invention, there is provided a portable object theft loss prevention apparatus, in which a receiver driven by a battery is attached to the portable object and a transmitter driven by a battery is carried by the carrier. In the device for preventing theft and loss of a portable object, which detects a decrease in the level of radio waves received from the transmitter in the receiver and issues a predetermined alarm, the portable object is of a type that is placed on the ground, floor, etc. It is a bag, and the receiver is
It is characterized in that it has a switch means for cutting off its own operating power supply while the bag is placed.

The switch means can be composed of, for example, a switch attached to the handle of the bag or a switch attached to the bottom of the bag.

It is desirable that the transmitter intermittently generate a modulated radio wave including the serial ID code.

It is desirable that the transmitter has a switch means for turning on its own operating power source only during a period in which the radio wave is generated.

The receiver preferably has a voltage drop detecting means for detecting a drop in its own battery voltage, and issues a second alarm when the voltage drop is detected, and the second alarm is the predetermined alarm. It can be distinguished from the alarm.

[0019]

In the present invention, the ID code signal is included in the radio waves transmitted and received between the wearer and the carry object, and the detection of coincidence with the own ID code in the receiver is a condition for alarm suppression. Therefore, even if the signal level of the received radio wave is above a predetermined level, the alarm is not suppressed only by that,
Furthermore, the alarm is suppressed only when the ID codes match. As a result, it is possible to prevent a malfunction of the receiver in which an alarm is erroneously suppressed, or to prevent an illicit suppression of alarm generation. Although it is possible to make the transmitted and received signal frequencies different regardless of the ID code, the ID code is considered to be superior because the number of usable frequencies is limited and the circuit is complicated. .

Further, by holding the receiver toward a portable object such as a bag, the receiver is operated only while the portable object is being lifted, and the operating power source of the receiver is provided while the portable object is placed. Shut off. Normally, the time for lifting a portable object such as a bag is shorter than the time for carrying it, so that the power consumption of the receiver can be significantly reduced. It is convenient to use a microprocessor for processing such as ID code recognition and comparison in the receiver, and such a circuit inevitably increases power consumption. Therefore, this feature of low power consumption of the present invention is particularly effective in a receiving circuit in which ID code comparison processing and the like are performed by a microprocessor. Further, also in the transmitter, the power consumption of the transmitter can be reduced by interrupting the power supply conduction of the transmitter during the non-transmission period accompanying the intermittent transmission of the ID code.

Also, the battery voltage drop of the receiver is checked, and when it is detected, a second alarm different from the alarm based on the ID check is issued. As a result, it is possible to prevent the alarm from not being generated due to the dead battery of the receiver.

It should be noted that the battery exhaustion of the transmitter works on the alarm issuing side and is easily noticed by the wearer, but the battery exhaustion of the receiver works on the side that does not generate the alarm, so there is a risk that it may not be noticed. From this point of view, the voltage drop of the receiver is more serious, and it is sufficient to check the battery voltage drop on the receiver side.

[0023]

Embodiments of the present invention will now be described in detail with reference to the drawings.

The preferred embodiment of the present invention is applied to a travel bag 82 having a handle 84, as shown in FIG. The receiver 86 is built in the travel bag 82 or is detachably equipped, while the transmitter 81 is held (preferably worn) by the wearer of the bag.

FIG. 1 shows a schematic configuration of a theft loss prevention apparatus according to this embodiment. FIG. 7A shows the structure of the transmitter 81. It comprises a battery 2, a power switch (SW) 4, a body circuit 6, and a transmitting antenna 8. Also, FIG.
Shows the configuration of the receiver 86. The receiver 86 includes a receiving antenna 11, a main body circuit 12, a volume adjusting unit 13, a buzzer 14, a handle switch 15, a power switch 16, and a battery 17.
Consists of The handle switch 15 and the power switch 16 are connected in series as will be described later, the power of the receiver 86 is conducted when both switches are on, and the power of the receiver 86 is shut off when either one of them is off, The power of the battery 17 is not consumed. Although not particularly shown, the handle switch 15 may be a known switch as disclosed in Japanese Patent Laid-Open No. 2-71709. That is, any spring-loaded on / off switch provided on the attachment portion of the handle 84 (FIG. 4) or the grip portion of the handle, which is turned on when the bag is lifted by the handle 84, may be used. Alternatively, instead of the handle switch 15, a switch which is arranged at the bottom of the bag and which is turned on when the bag is lifted may be used instead of the handle switch 15. In the case of a bag with casters that is not lifted when the bag is moved, it is desirable to provide a switch on the handle portion that is used when the bag is moved.

FIG. 2 shows a specific circuit configuration example of the transmitter 81. In this circuit, when the battery 2 is used as a power source and the power switch 4 is turned on, operating power is supplied to each part via the switch circuit 20 and operation is started. When the operation is started, the oscillation circuit 28 has a constant frequency (480 k in this embodiment).
The oscillation signal 30 of (Hz) is output. The oscillation signal 30 is divided by the frequency divider 27. The frequency divider 27 is, for example, 1
It is a 2-bit counter, which divides the frequency by 1/4096. This frequency-divided output is used as a clock input to the counter circuit 26. The counter circuit 26 is, for example, a 7-bit counter, and drives the AND gate 25 with a specific output (here, upper bits 5 to 7 of bits 1 to 7), and as shown in the upper side of FIG. The gate output 23, which is a pulse having a width of 16 clocks in a cycle of 128 clocks, is periodically generated. The gate output 23 is input to the switch circuit 20, and inside thereof, the switching transistor 22 is turned on via the transistor 24 for a period of 16 clocks. As a result, in the transmitter 81, the operating power source is intermittently turned on, and according to a simple calculation, the power consumption is ⅛ as compared with the case where it is always turned on. Further, in order to generate the ID code within this conduction period, the counter circuit 26 outputs 3 to the ID code generating circuit 33.
4 is generated. The output 34 is at least 12 different digital data strings. ID code generation circuit 33
Receives the digital data string and outputs the serial data 32 including the ID code based on the ID code stored in advance. In this embodiment, the serial data 3
As shown in the lower side of FIG. 3, 2 is 12-bit data including a 10-bit ID code including a start bit and a stop bit for asynchronous transmission. The modulation / oscillation circuit 29 modulates the oscillation signal 30 with the serial data 32 and transmits a radio wave from the transmitting antenna 8. In this embodiment, well-known amplitude modulation is adopted as the modulation method, but it is also possible to adopt other modulation methods such as frequency modulation. In this embodiment, since it is assumed that the alarm is issued when the portable object and the portable person are separated from each other even at an extremely short distance (for example, around 1.5 m), the transmitted radio wave may be relatively weak. Also, as will be described later, I
Since D match is a condition for alarm suppression, an alarm is issued if the IDs do not match even if the reception level of the radio wave is above a predetermined level. As a result, it is possible to avoid a situation in which the alarm is not issued when a theft or the like occurs.

The ID code generation circuit 33 is, for example, a gate array logic (GAL), programmable array logic (PAL) or read only memory (RO).
It can be configured using an integrated circuit (IC) such as M) capable of storing an arbitrary code in a nonvolatile manner. Since a 10-bit ID code is used in this embodiment, 1024 different IDs can be given to the transmitter and receiver pairs. As described above, in this embodiment, an extremely narrow range is assumed as a range in which the alarm is suppressed, so that it is probabilistic that a transmitter / receiver to which the same ID code is accidentally present exists within the range. Is extremely rare. Therefore, from the viewpoint of security, it is considered that a 10-bit ID code is sufficient. However, the present invention is not limited to this number of bits.

Next, FIG. 5 shows a concrete configuration example of the receiver 86 corresponding to the configuration of the transmitter 81. In this embodiment, the microprocessor 44 is used as a main component of the receiver 86. This is a type having a built-in A / D conversion function. As will be described later with reference to FIG. 6, the microprocessor 44 detects various things such as detection of battery voltage drop, detection of ID code from received signal, reading of ID code of its own receiver, generation of alarm (buzzer sound), and the like. Functions as a processing means.

Radio waves from the transmitter 81 are received by the receiving antenna 1
1 is received by the receiving circuit 41 and demodulated (detected)
The signal is demodulated by the circuit 42. This demodulated signal is input to the base of the transistor 43, inverted by this, and input to one data input terminal P of the microprocessor 44. As described above, the transmitted radio wave is transmitted intermittently, and the output of the demodulation circuit 42 is in the low state while the transmission is not performed. Therefore, the transistor 43 becomes non-conductive, and the input terminal P is maintained in the high state. When transmission is started, the output of the demodulation circuit first goes high in response to the start bit, resulting in the input terminal P going low. In response to this, the microprocessor 44 sends 1 after the start bit.
The detection of the 0-bit ID code is started. On the other hand, the microprocessor 44 has the I of its receiver 86 at initialization.
The D code is read in advance from the ID code generating circuit 45 and stored in an internal memory or register (not shown). The ID code generation circuit 45 is preferably the same circuit as the ID code generation circuit 33 of the corresponding transmitter 81, and has the same ID code set therein. When the ID code is not recognized from the received signal for a certain period of time or when no match is detected by comparing both ID codes, the microprocessor 44 controls the buzzer 14 via the volume adjusting unit 13 to prevent theft or the like. A first alarm indicating the occurrence is issued.

The volume adjusting unit 13 includes a switching transistor 131 and a parallel resistance group (including simple lead wires).
132 and a DIP (Dual In Line Package) switch 133. One resistance is selected by the switch 133, and the volume of the buzzer 14 is controlled in multiple stages (three stages in this example). One variable resistor may be used instead of the DIP switch 133 and the parallel resistor group. In this case, the volume can be continuously changed.

The power source of the receiver 86 is the battery 17, and the battery output is connected to the Vcc voltage output terminal 46 via the power switch 16 and the handle switch 15 which are connected in series, and is supplied to each part from here. The power switch 16 is
This switch is manually operated by the wearer, and is turned off when it is not necessary to issue an alarm.
The handle switch 15 is a switch that is turned on by lifting the bag as described above. Since both switches are connected in series, even if the power switch 16 is on, when the handle switch 15 is off (that is, the bag is placed on the floor, the ground, etc.), power to each part of the receiver is supplied. Supply is cut off,
During that time, the power of the battery 17 is not consumed. This type of bag is rarely continuously lifted for long periods of time, and stays on the ground or floor for a longer period of time. Therefore, the power consumption of the receiver 86 is stopped while it is in the mounted state. It is generally known that even if the battery is used for the same time, the life of the battery is longer when it is used in small pieces than when it is continuously used.

The Vcc output terminal 46 is further connected to the power input terminal of the ID code generating circuit 45 via the switching transistor 50. The microprocessor 44
The transistor 50 is turned on only when reading the D code, and the conduction is cut off after reading the D code.
The power consumption by the code generation circuit 45 can be reduced to zero.

The power supply voltage Vcc is divided by a voltage divider composed of resistors 47 and 48, and the divided output 49 is input to the analog input terminal AN of the microprocessor 44. The microprocessor 44 checks the input signal of the analog input terminal AN, and when it becomes lower than a predetermined reference voltage level, controls the buzzer 14 to generate a second alarm. Specific examples of the first and second alarms will be described later.

FIG. 6 is a flowchart showing an example of processing executed by the microprocessor 44. This process is activated when the power switch 16 is turned on and the handle switch 15 is turned on so that the power is turned on. First, processing processing such as resetting a timer and resetting various flags, which will be described later, is performed (51). Next, a process for checking the battery voltage drop is performed (52). This is done by comparing the voltage divider output 49 with a predetermined reference value. In the present embodiment, as described above, it is not assumed that the bag is continuously lifted for a long time, so it is sufficient to check the voltage drop when both switches are turned on. If no voltage drop is detected, the process proceeds to step 55, and if detected, a second alarm is issued to notify the voltage drop (54). Although not shown, this is done by setting a flag, for example. Next, from the ID code generation circuit 45, the own ID
A code reading process is performed (55). Therefore, reception processing of the transmission signal from the transmitter 81 is performed (56). In this process, an attempt is made to detect the ID code of the transmitter 81. If the ID code is not recognized (57 No), it is checked whether the timer set time has elapsed (time out) (6
0), if not timed out, the process returns to the reception process of step 56. If the time is out, a first alarm for notifying the occurrence of theft or the like is generated (61). If the second alarm has already occurred, this first alarm has priority over the second alarm. By thus providing a certain time for determining the ID recognition result, it is possible to prevent an alarm from being erroneously issued when reception is interrupted for a very short time or the reception level is lowered for some reason. it can. However, this grace period must not be long enough for the carry-on items to be taken away during that period.

When the ID code can be recognized in step 57, this ID code is compared with its own ID code, and if a match is confirmed (58 Yes), the timer is reset (59) and the reception of step 56 is received. Return to processing. In step 59, if the flag for generating the first alarm has already been set, it is reset. If the ID codes do not match, the process proceeds to step 61 and a first alarm is generated. This also depends on the flag set. With such a configuration, even if the same type of ID code is recognized, its I
As long as the D codes do not match, the alarm (first alarm) cannot be suppressed and security can be improved.

Next, specific examples of the first and second alarms will be described with reference to FIG. FIG. 7A shows a specific example of the first alarm issued when a theft occurs or the like. In this example,
A buzzer sound of 0.1 seconds is sounded 3 times with a silent section of 0.9 second, and then a buzzer sound of 0.1 second is continuously sounded with a silent section of 0.2 second. FIG. 7B shows a specific example of the second alarm issued when the voltage drops. In this example,
The combination of the 0.1 second buzzer sound, the 0.5 second silent section, the 0.1 second buzzer sound, and the 1.3 second silent section is repeated. This allows both alarms to be audibly identified using one buzzer 14. Further, in the example of FIG. 7, since the first alarm of (a) has a more urgent sounding mode, the user can easily recognize the first alarm. The buzzer can be controlled by the microprocessor 44 by using a well-known timer interrupt with reference to the flag.

Finally, with reference to the timing chart of FIG. 8, the manner of generating the first alarm in this embodiment will be described. (A) and (d) of the same figure show the inside and outside of the effective area, and (b)
(E) shows the on / off state of the handle switch, (c)
(F) shows the presence or absence of the operation of the first alarm. It is assumed that the power switch 16 is in the on state. In the present embodiment, an area with a radius of about 1.5 m centering on the transmitter is set as an effective area where alarms can be suppressed. Therefore, when the carrier who carries the transmitter moves, the effective area also moves. When the handle is turned on (front end of 72) while the bag is outside the effective area (71), the first alarm starts to sound within a maximum of 2 seconds (73). Further, when the handle switch is turned off in this state (the rear end portion of 72), the alarm is stopped within 0.1 seconds at the maximum. In the effective area, even if the handle switch is turned on (74), the first alarm does not sound. After the handle switch is turned on in the effective area (77), the first alarm starts to sound within a maximum of 2 seconds when the bag comes out of the effective area (the front end of 76) (7).
8). If the bag returns to the effective area with the handle switch on (the rear end of 76), the alarm will stop sounding within a maximum of 2 seconds.

As described above, as a preferred embodiment of the present invention, the one applied to a travel bag has been shown, but other than this, it is placed on the ground, floor, etc. The present invention can be applied to a portable object that can detect that the user has lifted up. For example, it can be applied to baggage, deliveries, and the like.

Further, in the above description, the transmitter and the receiver are one.
Although it is one to one, it may be one to plural. For example, when one person owns or manages multiple items,
The same ID for each portable item for one transmitter
Attaching a separate receiver with cord, one of which
An alarm can be issued by the receiver of the portable object even when the portable object is separated from the carrier.

The power saving feature of the receiving circuit such as the handle switch described above can be adopted independently of the use of the ID code.

[0041]

According to the present invention, in an apparatus for notifying the occurrence of loss or theft of a portable object by using an electric wave, an ID
By adopting the code, it is possible to prevent non-occurrence of an alarm due to a malfunction or suppression of an unauthorized alarm. Also,
To reduce the power consumption of the receiver by shutting off the operating power supply of the receiver while the portable object is placed, and to reduce the power consumption of the transmitter by conducting the intermittent power supply according to the generation of the ID code. You can

[0042]

[Brief description of drawings]

FIG. 1 is a block diagram showing a configuration example of a transmitter and a receiver constituting a theft loss prevention apparatus of the present invention.

FIG. 2 is a circuit block diagram showing a specific example of the transmitter shown in FIG.

FIG. 3 is a timing diagram illustrating an operation of the transmitter of FIG.

FIG. 4 is an explanatory diagram of an example of a portable object to which the present invention is applied.

5 is a circuit block diagram showing a specific example of the receiver of FIG.

FIG. 6 is a flowchart illustrating an operation of the receiver of FIG.

7 is an explanatory diagram of how the first and second alarms emitted by the receiver of FIG. 5 sound.

FIG. 8 is a timing chart for explaining an operation example of the theft loss prevention apparatus according to the embodiment.

[Explanation of symbols]

2, 17 ... Battery, 4, 16 ... Power switch, 6, 12 ...
Main body, 8, 11 ... Antenna, 13 ... Volume control unit, 14 ...
Buzzer, 15 ... handle switch, 20 ... switch circuit, 2
5 ... AND gate, 26 ... Counter circuit, 27 ... Divider, 28 ... Oscillation circuit, 29 ... Modulation / oscillation circuit, 33 ... I
D code generating circuit, 41 ... Receiving circuit, 42 ... Demodulating circuit,
43 ... Transistor, 44 ... Microprocessor, 45
... ID code generating circuit, 46 ... Vcc output terminal, 47,
48 ... Resistor, 50 ... Transistor, 81 ... Transmitter, 84
… Handle, 86… Receiver.

Claims (8)

[Claims] 1. One of a battery-driven transmitter and a receiver is attached to a portable object, and the other is carried by the portable person.
An apparatus for preventing theft and loss of a portable object, which detects a decrease in the level of a radio wave received from the transmitter in the receiver and issues an alarm, wherein the transmitter generates an oscillation signal of an oscillation signal of a predetermined frequency. Code generating means for periodically generating a serial ID code, and modulating / transmitting means for modulating the oscillation signal with the serial ID code generated by the code generating means and transmitting the modulated signal as a radio wave. The receiver includes a code storage unit that stores an ID code, a receiving unit that receives a radio wave from the transmitter, and a serial ID from the radio wave received by the receiving unit.
Code recognition means for reading a code, code comparison means for comparing the ID code recognized by the code recognition means with the ID code in the code storage means, when the code recognition means cannot recognize the ID code, and the ID An apparatus for preventing theft and loss of a portable object, comprising: alarm generating means for issuing a predetermined alarm when the result of the comparison does not match even if the code can be recognized. 2. The portable object is of a type mounted on the ground, floor, etc., the receiver is attached to the portable object, and the receiver is provided while the portable object is mounted. The device for preventing the loss and theft of a portable object according to claim 1, further comprising a switch means for cutting off its own operating power source. 3. A battery-powered receiver is attached to a portable object, and a carrier carries a battery-powered transmitter.
In a device for preventing theft and loss of a portable object, which detects a level decrease of a radio wave received from the transmitter in the receiver and issues a predetermined alarm, the portable object is of a type mounted on the ground, floor, etc. An apparatus for preventing theft and loss of a portable object, which is a bag, wherein the receiver has a switch means for cutting off its own operating power supply while the bag is placed. 4. The switch means is constituted by a switch attached to the handle of the bag.
The device for the prevention of theft and loss of the listed portable items. 5. A switch according to claim 2, wherein the switch means is a switch attached to the bottom of the bag.
The device for the prevention of theft and loss of the listed portable items. 6. The portable theft loss prevention apparatus according to claim 1, wherein the transmitter intermittently generates a modulated electric wave including the serial ID code. 7. The portable article theft loss prevention apparatus according to claim 6, wherein said transmitter has a switch means for turning on its operating power source only during a period in which said radio wave is generated. 8. The receiver has a voltage drop detecting means for detecting a drop in its own battery voltage, and the receiver receives a second voltage drop when the voltage drop is detected.
The portable object theft loss prevention apparatus according to any one of claims 1 to 7, wherein the second warning is distinguishable from the predetermined warning.