KR200287581Y1 - Device for detecting the distance between RF tag and signal receive and alarm display unit - Google Patents

Abstract

The present invention visually displays the distance between the RF tag for transmitting the radio signal and the signal receiving and alarm generator for receiving the radio signal, and also the distance for generating an alarm when the RF tag is out of a preset limit distance. It relates to a separation sensor.

The apparatus for detecting distance separation according to the present invention includes an RF tag for storing a unique identification code therein and periodically transmitting a radio signal including a unique identification code, and receiving and receiving a radio signal transmitted from the RF tag. It measures the strength of the radio signal to detect the separation distance to the RF tag and displays it as a number, and the signal receiving and alarm generator that outputs an alarm signal when the distance or approach the set for the RF tag, RF tag The distance between the person carrying the tag or the person carrying the RF tag can be determined in real time, and if the RF tag is out of the setting distance or close to the setting distance according to the setting state of the signal reception level, an alarm sound can be output immediately. Therefore, the real-time location of moving or moving objects such as simple odometers, personnel managers, and anti-lost devices That would be.

Description

Device for detecting the distance between RF tag and signal receive and alarm display unit}

The present invention relates to a distance separation detecting device for detecting and displaying a separation distance from a person or an article, and more specifically, an RF tag for storing a unique identification code therein and transmitting a radio signal, and the RF Receives the signal transmitted from the tag, measures the strength of the radio signal, detects the separation distance, and generates an alarm when the setting distance is out of range, and also visually separated from the alarm sound when the RF tag approaches by mode switching The present invention relates to a distance separation detection device comprising a signal receiving and an alarm generator indicating a distance degree.

Various equipments using the wireless transmission and reception apparatus are being used, and one of them is a lost device. The anti-lost device attaches a transmitter to an infant or a child and detects a position by receiving a radio wave signal transmitted from a transmitter by using a receiver. However, since it can receive a radio signal only within a certain radius, it can effectively prevent the loss of a child. It contains a problem that cannot be found.

This is especially true because the anti-lost device does not display the distance in real time according to the strength of the radio signal received by the receiver, but generates a warning by changing the volume of the beep only when it is out of the set distance. The location of the lost child in the grounds can be measured because it does not accurately detect how much it has moved.

In addition, the conventional anti-lost device alerts only when a missing event occurs outside the distance between the transmitter and the receiver, so there is an inherent problem that the child's movement state cannot be grasped in advance.

As another application example of the wireless transmission / reception apparatus, even when applied to an article anti-theft device, even if valuables or controlled items with a transmitter are stolen and moved, they do not immediately grasp the movement state and are out of the radio wave reception range of the transceiver. Since theft is identified, there is no effect of preventing theft.

The present invention is to solve the above problems, the object of the present invention is to visually display the distance between the transmitting device and the receiving device can detect the movement state in real time, and immediately alerts you when out of the set distance It is to provide a distance separation detection device that can generate.

Another object of the present invention is to provide a distance separation detection device comprising an RF tag, a signal reception and an alarm generator, which can be used as integrated management of a plurality of people such as travelers, anti-lost, item management and a portable rangefinder.

It is still another object of the present invention to provide a distance separation detection apparatus capable of identifying a location of a lost RF tag by detecting an RF tag receiving a signal and approaching an alarm generator and outputting an alarm.

1 is a block circuit diagram of a distance separation detection device of the present invention,

2 is a flowchart illustrating a transmission state of an RF tag according to the present invention;

3 is a flowchart illustrating a signal reception and reception state of an alarm generator according to the present invention;

Figure 4 is a flow chart showing the state at the time of proximity reception of the signal reception and the alarm generator of the present invention.

※ Explanation of symbols about main part of drawing ※

10: RF tag 30: Signal reception and alarm generator

110: frequency generator 120: carrier generator

130: modulator 140: amplifier

150: transmitter 160: antenna

170: identification code storage unit 180: power supply unit

310: receiver 320: demodulator

330: amplification unit 340: level detection unit

350: reference level generator 360: level comparison

370: display device 380: CPU

390: alarm unit 400: power supply unit

410: flashing display

In order to achieve the above object, the apparatus for distance separation according to the present invention includes an RF tag for transmitting a radio signal periodically storing a unique identification code and including a unique identification code, and a radio signal transmitted from the RF tag. Receives and measures the strength of the received radio signal to detect the separation distance to the RF tag and displays it as a number, and the signal receiving and alarm generator that outputs an alarm signal when the distance or approach the RF tag set It is characterized by.

Hereinafter, referring to the accompanying drawings, a distance distance detection apparatus of the present invention will be described in detail.

FIG. 1 is a block circuit diagram of an embodiment of the apparatus for detecting a distance separation according to the present invention, and is separated into an RF tag 10 for transmitting a radio signal and a signal reception and alarm generator 30 for receiving the radio signal.

The RF tag 10 includes a frequency generator 110 for generating a predetermined signal wave having a predetermined frequency, a carrier generator 120 for generating a carrier wave, and a signal generated by the frequency generator 110. A modulator 130 for modulating the mixed signal of the wave and the carrier generator 120 and an amplifier 140 for amplifying the RF modulated signal output from the modulator 130 to a predetermined level; A transmission unit 150 for transmitting the RF signal output from the amplification unit 140 through the antenna 160, an ID code storage unit 170 storing a unique identification ID, and periodically performing signal transmission; It includes a power supply unit 180.

In addition, the signal reception and alarm generator 30 detects a signal wave by removing a carrier wave from a receiver 310 for receiving an RF signal through the antenna 160 and an RF signal received by the receiver 310. A demodulator 320, an amplifier 330 for amplifying the signal wave output from the demodulator 320 to a predetermined level, and a current value of the signal wave output from the amplifier 330. The signal level detection unit 340 for outputting a signal corresponding to the control signal and the detection level included in the reference level, the reference level generator 350 for providing a reference point of the signal level, and for comparing the intensity of the input signal level A signal level comparing unit 360 and a CPU 380 for detecting a registration state of the RF tag 10 according to the input signal, displaying a separation distance, and detecting that an alarm level is exceeded, and the CPU 380. Indication of distance according to control signal Value 370, an alarm unit 390 for generating an alarm in accordance with the control signal of the CPU 380, and a control signal of a controller (not shown) in accordance with the degree of separation from the signal reception and the alarm generator 30. It includes a flashing display unit 410 that can visually display the separation degree.

The transmission state by the RF tag 10 among the distance separation sensing apparatuses having the above configuration will be described with reference to the flowchart of FIG. 2. First, the RF tag 10 is attached to the inside and outside of the personnel or items to be managed, valuables or items to measure the distance, the signal reception and alarm generator 30 is preferably carried by the individual.

When the power is turned on while the RF tag 10 is attached, the preset transmission cycle is read, and the ID code storage unit 170 transmits the unique identification code stored therein. This periodic transmission operation continues until the power is turned off to transmit a radio signal to the signal reception and alarm generator 30. In detail, when the user turns on the operation switch (not shown) of the RF tag 10, the power is supplied to the entire circuit from the power supply unit 180, and the operation switch of the signal reception and alarm generator 30 is also turned on. When turned on, power is supplied from the power supply unit 400 to the entire circuit.

As described above, in the state in which power is supplied to each circuit, the ID code storage unit 170 in the RF tag 10 periodically generates a signal wave including the identification code signal, and generates the frequency generator 120 and the carrier generator ( In step 120, the set signals are generated and mixed to form an RF signal. The mixed RF signal becomes a predetermined frequency signal after being modulated by the modulator 130. This frequency is the same as the frequency of the signal reception and alarm generator 30. The signal modulated by the modulator 130 is amplified by the amplifier 140 at a predetermined amplification rate, and then transmitted to the air through the antenna 160 via the transmitter 150.

The radio signal transmitted through the antenna 160 of the RF tag 10 is received through the antenna 160 of the signal receiver and the alarm generator 30. The received RF signal is applied to the demodulator 320 through the receiver 310, and demodulated to a signal wave from which the carrier wave is removed from the demodulator 320. The signal wave contains information about the unique identification code.

The signal wave demodulated by the demodulator 320 is amplified by the amplifier 330 and then applied to the signal level detector 340. In this case, the signal level detector 340 receives the signal input from the amplifier 330. The magnitude (voltage) of the waveform of the wave is detected, and the detected voltage value is input to the level comparison unit 360 together with the reference voltage level generated from the reference level generator 350.

The input voltage is compared by the level comparison unit 360 to detect whether the detected voltage value is higher than the reference voltage level, and input the detection result to the CPU 380. The CPU 380 determines the distance between the RF tag 10 and the signal reception and alarm generator 30 using the input detection result.

If the signal voltage level received at the level determination is less than the reference voltage level, the reference voltage is increased to the next step to compare the levels. This level comparison continues until the received voltage level is found to be greater than the reference voltage level, that is, the magnitude of the sensitivity of the received signal is greater than the distance set by the reference voltage value. In addition, by changing the reference level value in the CPU 380, the alarm distance can be arbitrarily set, which gives a variability that can change the movement state of the personnel or items depending on time and place.

As described above, the distance change between the RF tag 10 and the signal reception and alarm generator 30 may be grasped, and a plurality of light emitting display elements may be included in order to allow an administrator to easily recognize the spaced state of the distance. The blinking display unit 410 is used. In other words, if the distance between the RF tag 10 and the signal receiving and hardness generator 30 is 10m, one light emitting display device mounted on the flashing display unit 410 is turned on, and the distance is 15m apart. In this case, the separation distance can be displayed in the same manner as two lightings and 20m lighting three. By doing so, the administrator can visually recognize the movement status of the registered RF tags and prevent theft accidents. The control of the flashing display unit 410 is a control signal from the CPU 380 which determines the distance separation state between the RF tag 10 and the signal reception and warning generator 30 by the level comparison from the level comparison unit 360. Is performed accordingly.

The distance extraction by comparing the sensed voltage level and the reference voltage level in the level comparator 360 may determine the voltage level of the signal using an A / D converter and convert it into a corresponding distance or D / A. The converter may generate a reference signal voltage corresponding to a certain distance, compare the reference voltage level with the input signal voltage level, and convert the distance into a distance.

The CPU 380 identifies the RF tag 10 using the unique identification code included in the signal wave input as described above, and also uses the voltage level to determine the distance. When the distance is calculated, the distance is numerically displayed through the display device 370. In addition, when the determined distance reaches the preset limit distance, the alarm unit 390 generates a warning sound, so that the administrator can determine whether the RF tag 10 attached to the specific object deviates from the set distance and take necessary measures.

The operation state of the signal reception and alarm generator 30 having such a configuration will be described with reference to the flowchart of FIG. 3. This is a state where the signal is received and operated by the CPU 380 of the alarm generator 30.

When the power is applied, first check if there is a registered RF tag for management. Information related to the registered tag is a unique identification code, an article name (or a person name), distance setting data, and the like. If there is no registered tag, it is determined whether or not to register the tag, and when it tries to register, the reference voltage is set to minimum and the reception standby state is maintained. When a signal is input from the RF tag 10, a tag unique identification code and a product name are input and registered. If it is queried whether there is a tag to be registered further, it maintains a reception standby state and if there is a signal input from the RF tag 10, it registers as above. If there are no more tags to register, the registration is released and the signal from the RF tag 10 is waited. At this time, since the registered tag exists, set the reference voltage to the value corresponding to the shortest distance and wait.

When no signal is input from the RF tag 10, the standby state is maintained. When the signal is received, it is determined whether the received signal is greater than the reference voltage. If the reference voltage is less than the input voltage, the reference voltage is sequentially increased to the next step, and the reference voltage is changed and then compared with the received signal.

If the received signal is larger than the reference voltage or the increased voltage, it is determined whether the received signal matches the registered unique identification code. If it does not match the registered unique identification code, it returns to the signal reception standby state again. However, if it is the same as the registered unique identification code, the reference voltage is converted into a distance and the distance is displayed on the display device 370.

At the same time, the CPU 380 determines whether an alarm distance is set for the corresponding RF tag 10, and if not set, maintains the signal reception standby state, and if an alarm is set, a distance corresponding to the currently received signal is set. Determine if it is bigger than alarm distance. If it is less than the alarm distance, the alarm display is canceled and the signal returns to the standby state. However, if it is determined that the distance measured by the currently received signal is larger than the set alarm distance, an alarm is generated by sound or vibration, and the display device 370 indicates that the setting distance is out of range. As described above, the distance between the RF tag 10 and the signal reception and alarm generator 30 may be displayed, and an alarm sound may be immediately generated when the distance is out of the set distance, thereby identifying the fact of departure.

In addition, the present invention not only senses the movement state of the RF tags 10 located within a certain distance, but also receives a signal from a lost object (actually, a signal from an RF tag installed on the lost object). It is possible to figure out the location of the. In other words, when the signal is received and the alarm generator 30 is used to detect the radio signal and approaches the lost object, the radio signal emitted to the lost object may be detected to recognize that the object exists within a certain radius. 4 is a flowchart showing an operation state in the case of selecting and using for wireless signal detection.

As shown, if it is confirmed that there is a registered RF tag, the reference voltage is set to the maximum distance. By doing so, it is possible to detect the radio signal from the RF tag 10 existing within the maximum radius. In particular, by registering the lost RF tag 10 can be effectively used to search for the lost. Since the registration of the RF tag 10 has been described above, a detailed description thereof will be omitted.

If a lost object exists within the maximum set radius, a signal emitted from the RF tag is detected to notify that the lost object exists. In this case, since the distances spaced apart by the blinking display unit 410 can be recognized, moving in the direction in which the distances are narrowed increases the probability of finding lost items. It is apparent that the alarm can be displayed visually using the flashing display unit 410 while simultaneously displaying the sound and vibration using the alarm unit 390.

Although the use of one RF tag 10 has been described in the description of the present invention, it is obvious that multiple RF tags 10 having different unique identification codes may be registered and used simultaneously. In this case, it is possible to minimize the mutual interference by setting the transmission period of each RF tag 10 differently.

According to the present invention, the distance between the transmitting device and the receiving device can be visually displayed, and an alarm can be immediately generated when the distance is out of the set distance, so that the integrated management of multiple persons such as travelers, prevention of missing items, There is an effect that can be used as a management and portable rangefinder.

Claims (3)

An RF tag that stores an unique identification code therein and periodically transmits a radio signal including the identification code; Receives a radio signal transmitted from the RF tag, measures the strength of the received radio signal, detects the separation distance to the RF tag, displays it numerically, and outputs an alarm signal when the distance is approached or approaches the RF tag. Distance separation detecting device comprising a signal receiving and an alarm generator. The method of claim 1, The RF tag 10 is generated by the frequency generator 110 for generating a predetermined signal wave having a predetermined frequency, the carrier generator 120 for generating a carrier wave, and the frequency generator 110. A modulator 130 for modulating the mixed signal of the signal wave and the carrier wave output from the carrier wave 120 and an amplifier 140 amplifying the RF modulated signal output from the modulator 130 to a predetermined level And an ID code storage unit 170 for storing a unique identification ID and periodically transmitting a signal, for transmitting the RF signal output from the amplifier 140 through the antenna 160. And a power supply unit 180 for supplying power to the RF tag 10. The signal reception and alarm generator 30 detects a signal wave by removing a carrier wave from a receiver 310 for receiving an RF signal through the antenna 160 and an RF signal received by the receiver 310. A demodulator 320, an amplifier 330 for amplifying the signal wave output from the demodulator 320 to a predetermined level, and a current value of the signal wave output from the amplifier 330 to detect the signal wave. Signal level detection unit 340 for outputting a signal corresponding to the control signal and the detection level included, the reference level generator 350 for providing a reference point of the signal level, the signal for comparing the intensity of the input signal level A level comparison unit 360 and a CPU 380 for detecting a registration state of the RF tag 10 and displaying a separation distance according to the input signal and detecting that an alarm level is exceeded, and a level of the CPU 380. Display device 370 for displaying the distance according to the control signal ), And the degree of separation by the control unit of the CPU 380 in accordance with the alarm unit 390 for generating an alarm in accordance with the control signal of the CPU 380 and the degree of separation from the signal reception and the alarm generator 30. Distance detection device comprising a flashing display unit 410 that can be displayed visually. The method of claim 1, The distance extraction by comparing the sensed voltage level and the reference voltage level in the level comparator 360 may determine the voltage level of the signal using an A / D converter and convert it into a corresponding distance or D / A. And a reference signal voltage corresponding to a predetermined distance using a converter, and comparing the reference voltage level with an input signal voltage level to convert the reference signal voltage into a distance.