KR100648531B1 - The method and apparatus of coming in and out with radio frequency communication - Google Patents

Abstract

An apparatus and a method for managing coming in and out using a bidirectional RF communication between a radiation dosimeter and a reader are provided to transfer collected information to a unit managing computer by transmitting and receiving the information to the reader wirelessly. A dosimeter includes a semiconductor detecting section, a signal processing section, a system controlling section, an RF module, a display section, an alarm sound generating section, a switching section, and a power source section. A reader(200) for the dosimeter includes a control section, a communication section, an RF module, a monitor section(240), a touch channel, a key pad(260), a power source supply unit, an alarm section, and a display section. The alarm section generates different sounds according to the contents of the alarm. The display section displays the operation state of the dosimeter so that a user can easily recognize it.

Description

Device and method for managing exposure and access using bidirectional RF communication between personal dosimeter and reader period {THE METHOD AND APPARATUS OF COMING IN AND OUT WITH RADIO FREQUENCY COMMUNICATION}

1 is a perspective view showing an exposure and access control device using a two-way RF communication between the personal dosimeter and the reader period in accordance with the present invention,

Figure 2 is a block diagram showing the components of the personal dosimeter of the exposure and access management device using the two-way RF communication between the personal dosimeter and the reader period in accordance with the present invention,

3 is a circuit diagram showing the components of the personal dosimeter of the exposure and access management device using the two-way RF communication between the personal dosimeter and the reader period according to the present invention,

Figure 4 is an embodiment showing a semiconductor detection process through the PIN diode of the components of the personal dosimeter according to the present invention,

5 is a block diagram illustrating a signal processing process of a signal processing unit among components of a personal dosimeter according to the present invention;

6 is a perspective view of a personal dosimeter according to the present invention;

7 is a front view of a personal dosimeter according to the present invention;

8 is a block diagram showing the components of a personal dosimeter reader according to the present invention;

9 is a circuit diagram showing the components of the personal dosimeter reader according to the present invention;

10 is an embodiment showing a monitor unit consisting of a TFT-LCD among the components of a personal dosimeter reader according to the present invention,

11 is an embodiment showing a touch panel of the components of the personal dosimeter reader according to the present invention,

12 is an embodiment showing a power supply device among the components of the personal dosimeter reader according to the present invention,

Figure 13 is an embodiment showing the access state of the radiation reader using the RF transmitting and receiving module according to the present invention,

14 is a flow chart showing the operation of the personal dosimeter according to the present invention;

15 is a flowchart illustrating an operation process of exposure and access control using bi-directional RF communication between the personal dosimeter and the reader period according to the present invention.

※ Brief description of drawing code ※

100: personal dosimeter 110: semiconductor detection unit

120: signal processing unit 130: system control unit 130

140: RF module 150: display unit

160: alarm sound generating unit 170: switching unit

180: power supply 200: personal dosimeter reader

210: control unit 220: communication unit

230: RF module 240: monitor

250: touch panel 260: keypad

270: power supply unit 280: alarm unit

290: display unit

The present invention permits or controls the entry and exit of the radiation control area, which is a restricted access area, and when the personal dosimeter is contacted to the reader at a distance of 1 cm to 2 m, the collected information of the personal dosimeter is wirelessly transmitted to and received from the reader and transmitted to the device management computer. The present invention relates to an apparatus and method for exposure and access control using two-way RF communication between a personal dosimeter and a reader.

Techniques related to radiometers have been conducted intermittently as basic research in some research institutes and universities but have not been systematically or systematically performed. In recent years, the progress of radiometric technology has led to the commercialization of portable radiometers.

However, portable radiometers, especially personal exposure dosimeters, which are currently commercialized, are less reliable in their precise accuracy, and there is a great need for improvement in miniaturization and light weight. In addition, the exposure and access control devices used by domestic nuclear power plants and research institutes are expensive because they are all imported from foreign countries, and are newly purchased every year for maintenance. Localization of is urgently needed.

In addition, the conventional personal exposure dosimeter is designed to transmit data by directly connecting to the dosimeter reader when the work is completed while carrying out work carried out by the radiation field worker of a nuclear power plant or hospital. In addition, there is a disadvantage that is not designed to facilitate the connection with the facility control device, including the door.

In order to overcome these disadvantages, Korean Utility Model Publication No. 20-0311316 filed by the present applicant is a personal dose dosimeter data transceiver using a semiconductor detector, the data transceiver is a microprocessor unit for controlling the entire system, An infrared interface unit for performing wireless communication with the dosimeter using an infrared modulation scheme, and a power supply unit for supplying power to the system, and the necessary factors for the dosimeter are the data through infrared (IR) communication. Personal exposure dosimeter data transmission and reception device using a semiconductor detector input by the transmission and reception device has been proposed,

Through infrared communication, personal dosimeter data transmission and reception are limited by fog and dust in the air. In particular, various lights such as direct sunlight, fluorescent lamps, and incandescent lamps act as noises, which makes it difficult to accurately transmit and receive data.

In addition, the monitor quality of the reader is degraded when used for a long time, the need to replace the monitor at regular intervals occurred.

The present invention devised to solve the above problems consists of two-way RF communication of the low frequency band 50KHz ~ 500KHz when the personal dosimeter is contacted to the reader at a distance of 1cm ~ 2m, the collected information of the personal dosimeter is wirelessly transmitted and received to the reader To provide a device and method for exposure and access control using bi-directional RF communication between a reader and a personal dosimeter consisting of a touchpad and TFT-LCD with clear picture quality even for a long time.

In order to achieve the above object, the exposure and access management apparatus using the two-way RF communication between the personal dosimeter and the reader period according to the present invention,

Using a personal dosimeter to expose radiation, to control and manage access, and to wirelessly send and receive information collected from the dosimeter to a personal dosimeter reader,

The personal dosimeter includes a semiconductor detector 110 using a PIN diode which is a semiconductor sensor for precisely detecting high dose radiation, a signal processor 120 for amplifying an electrical signal of the semiconductor detector and generating a pulse signal, and stored in an internal memory. A system control unit 130 for overall control of each component according to a system control program, an RF module 140 for performing two-way wireless communication with the reader using an RF communication method, and output data of the system control unit And a display unit 150 for displaying on the LCD screen, an alarm sound generating unit 160 for notifying a danger when detecting radiation through the control of the system control unit, a switching unit 170 for checking the normal operation of the device and And, and the power supply unit 180 for supplying system power,

The personal dosimeter reader 200 uses a control unit 210 for controlling the entire system, a communication unit 220 for selecting and using RS232 / RS485 / ETHERNET for communication with a device management computer, and an RF communication method. RF module 230 for performing wireless communication with the personal dosimeter and a high-capacity TFT-LCD to implement a user interface (GUI) such as door control state, dosimeter setting on / off, manual entry / exit on / off, etc. When the monitor 240 contacts the character or picture information previously displayed on the monitor screen by hand, the touch panel 250 in which the user's selection is input according to the position of the touched screen is input, and input necessary for the operation of the system and Keypad 260 for operation, a power supply unit 270 for supplying 5V and 12V power inside the reader, and contents of an alarm to be notified to the user, that is, dose rate exceeded, cumulative dose exceeded, work time exceeded It is achieved by including an alarm unit 280 for generating a different alarm sound, and a display unit 290 for displaying the LED so that the operating state of the personal dosimeter can be easily recognized.

In addition, the exposure and access management method using the two-way RF communication between the personal dosimeter and the reader period according to the present invention,

1 second count step (S100),

Dose rate, cumulative dose calculation step (S110),

Alarm value comparison step (S120),

And calculating the working time of the user (S130),

Working time alarm value comparison step (S140),

Work time calculation step (S150),

LCD display step (S160),

LED display step (S170),

DATA storage step (S190) is made,

Between the step S170 and step S190 includes a two-way wireless communication step (S180) with the personal dosimeter reader through the RF module consists of a personal number (TLD-ID) when contacting the reader at a distance of 1cm ~ 2m ) Is input and the door is controlled (open or closed) and at the same time the measurement data of the radiation dose measured by the PIN diode of the personal dosimeter is transmitted to the personal dosimeter reader 200 at 50KHz ~ 500KHz,

 It is configured to receive radiation measurement item data, radiation measurement data, dose rate initialization data, dose rate data per unit time, program update data, and various environment setting data from 50KHz to 500KHz to the personal dosimeter contacted to the personal dosimeter reader through the manager computer. Is achieved.

In addition, the exposure and access management method using the two-way RF communication between the personal dosimeter and the reader period according to the present invention,

When the power is applied to the exposure and access control system step (S201) and start the main program is operated,

(S202) the current exposure and the status of the access control system is displayed on the LCD / LED of the personal dosimeter reader,

Checking whether the personal dosimeter is in contact with the personal dosimeter reader at a distance of 1 cm to 2 m (S203);

When the dosimeter is in contact, checking whether the door is in the entrance or exit state (S204);

In the case of entry, the LCD displays a confirmation number input request content and the LED turns on OK (S205),

Keypad input step (S206),

Performing RS232 / RS485 / ETHERNET communication between the manager computer and the access management system (S208a);

Performing RF communication between the personal dosimeter and the personal dosimeter reader in the access control system (S209a);

When the key input is completed, displaying the communication state on the LCD / LED (S207a),

In step S204, when the key input is completed, displaying the communication state on the LCD / LED (S207b);

Performing RS232 / RS485 / ETHERNET communication between the manager computer and the access management system (S208b);

Performing RF communication between the dosimeter and the access management system (S209b);

Step (S210) and confirming that the data transmitted and received with the manager computer is not abnormal;

If it is confirmed, the LCD indicates that the RF communication is completed, and the LED is ON only (ON) (S211) and

Opening the door (S212),

It is achieved by the step (S213) of checking the number of people passed through the door.

The personal dosimeter 100 according to the present invention includes a wireless RF module 140 connected to one side of the system control unit and transmitting the measurement data of the radiation dose measured by the PIN diode to the personal dosimeter reader 200 at 50 KHz to 500 KHz. Composed,

Personal dosimeter reader 200 is characterized by including an RF module 230 for performing wireless communication with the personal dosimeter 100 using the RF communication method.

Hereinafter, the present invention will be described in more detail with reference to the drawings.

First, a dosimeter used in conjunction with an exposure and access management system according to the present invention will be described. As shown in FIG. 2, the personal dosimeter 100 according to the present invention includes a semiconductor detector 110 and a signal processor 120. The system controller 130, the RF module 140, the display unit 150, the alarm sound generating unit 160, the switching unit 170, and the power supply unit 180 are configured.

The semiconductor detector 110 precisely detects the radiation dose through a PIN diode, which is a silicon semiconductor sensor, and generates the electrical signal.

In this case, the PIN diode uses a high-resistance substrate close to an intrinsic semiconductor in order to increase the specific resistance. The structure of the PIN diode is P (Pitive)-I (Intrinsic)-N (Negative) as shown in FIG. ) Structure, which senses radiation passing through the i-layer by using the photoconductive effect generated in the n-layer when reverse bias is applied. In the present invention using this feature as shown in Figure 3, the output signal of the PIN diode is applied to one side of the system control unit through the pin 2 of the connector (J1).

The signal processor 120 amplifies an electrical signal of the semiconductor detector 110 to generate a pulse signal. As shown in FIG. 5, the electrical signal of the semiconductor detector 110 is a high gain amplifier 121 or a buffer amplifier. After passing through the clipping circuit 124 through the primary transmit amplifier 123, the signal is output from the signal processor through the secondary amplifier 125.

The signal processing unit 120 reduces the period of the pulse by reducing the size of the overshoot resulting from the increase of the amplification rate due to the high gain amplifier by removing the high gain amplifier installed in the rear stage of the existing secondary amplifier, about 10 Sv / h Measurements can be made up to a high dose rate range.

The system controller 130 controls overall components according to a system control program stored in an internal memory. As illustrated in FIG. 3, the system controller 130 includes a semiconductor detector 110, an RF module 140, and a display unit. 150, the alarm sound driver 160, the switching unit 170, the power supply unit 180 is connected.

The system control unit 130 having such a configuration receives the dose rate detected by the radiation detection unit 110, calculates the dose rate, adds the accumulated dose rate of the built-in memory, and calculates a result value and makes a database.

In addition, the operator's personal number (TLD-ID) is embedded in the system control unit, and the cumulative dose rate and the detected dose rate which are databased in the system control unit are transmitted to the display unit 150.

In addition, the system control unit enters a personal number (TLD-ID) when the personal dosimeter is contacted to the reader at a distance of 1 cm to 2 m through the RF module, and the door is controlled (open or closed) and the radiation measured by the PIN diode of the personal dosimeter. The amount of measurement data is transmitted to the personal dosimeter reader 200 at 50 KHz to 500 KHz,

 Control of receiving radiation measurement item data, radiation measurement data, dose rate initialization data, dose rate data per unit time, program update data, and various environment setting data from the 50KHz to 500KHz toward the personal dosimeter in contact with the personal dosimeter reader through the manager computer. do.

The RF module 140 is for performing two-way wireless communication with the reader by using an RF communication method, which is composed of an RF output unit 141 and an RF input unit 142 as shown in FIG. .

The RF output unit 141 outputs data including a frequency of 50 KHz to 500 KHz through the output terminal P6.0 / A0 of the controller 130 to the antenna of the reader through the connector J8 and the connector J7. It serves to convey.

In addition, the RF input unit 142 maintains the antenna of the personal dosimeter in a high impedance state through the capacitor MC5 and the variable capacitor TRIMMER1, which are resonant circuits, and resonates to match the RF carrier of the reader antenna. When the RF signal outputted from is inputted through the antenna of the personal dosimeter, the voltage level is increased and amplified through the first gate circuits U9A and U9B, and the controller is formed by shaping in the circuits U9C and U9D amplified by the first gate circuit. It serves to input to the input terminal (P6.0 / A1) of (130).

The display unit 150 and the alarm sound driver 160 display data output from the system controller on the LCD screen, and generate an alarm sound through a buzzer to inform the danger of detecting the radiation. As shown in FIG. 7, a buzzer that is an alarm sound is installed in the center of the radiation measuring device, and an LCD screen is installed on one side of an upper end of the buzzer to display an alarm sound, radiation dose, battery level, etc. to the user.

As described above, when the radiation dose is detected through the PIN diode in the personal dosimeter according to the present invention, the irradiation dose rate is ± 20% 1,000R / h, the exposure dose is ± 15% 1,000rem, the linearity is ± 5%, and the reaction time is 1.5 to 3sec. It has excellent features.

Next, when the personal dosimeter 100 according to the present invention contacts the reader 200 at a distance of 1 cm to 2 m, the collected information of the personal dosimeter is wirelessly transmitted and received with the control of the door and transmitted to the device management computer. The personal dosimeter reader 200 for transmitting and receiving the information stored in the personal dosimeter and wirelessly communicating in both directions will be described.

As shown in FIG. 8, the personal dosimeter reader 200 according to the present invention includes a control unit 210, a communication unit 220, an RF module 230, a monitor unit 240, a touch panel 250, and a keypad 260. ), A power supply unit 270, an alarm unit 280, and a display unit 290.

The control unit 210 is for controlling the entire system, and as shown in FIG. 9, the control unit 210 is composed of a high performance / low power RISC microprocessor ATMEGA128, and the input / output terminal PA0 is connected to the RS232 and RS485 connected to the device management computer. The input / output terminal PD0 and the input / output terminal PD1 are connected to an RF module for wireless communication with a personal dosimeter, and the input / output terminal PB0 is connected to a monitor unit made of a large-capacity TFT-LCD. The terminal PC0 is connected to the touch panel, the input / output terminal PF0 is connected to the keypad for input and operation necessary for the operation of the system, and the input / output terminal PG0 is connected to the display unit for confirming the existence of the personal dosimeter. It is composed.

The control unit having such a configuration controls to communicate with the device management computer through the RS232 / RS485 / ETHERNET of the communication unit 220,

Through the RF module to transmit the measurement data of the radiation dose measured by the PIN diode of the personal dosimeter at 50KHz ~ 500KHz to the personal dosimeter reader 200,

 Control of receiving radiation measurement item data, radiation measurement data, dose rate initialization data, dose rate data per unit time, program update data, and various environment setting data from the 50KHz to 500KHz toward the personal dosimeter in contact with the personal dosimeter reader through the manager computer. do.

In the present invention, the RF transmission and reception is configured at 50KHz to 500KHz, and the reason thereof will be described.

Low frequency communication consumes less power than high frequency communication, but low frequency communication takes a lot of time when there is a lot of communication data.

In case of high frequency communication (MHz or more), it is suitable for transmitting a large amount of data because the communication speed is fast instead of increasing power consumption.

However, in this case, hardware performance needs to be higher in order to process fast data, so it is required to use a CPU that uses a fast clock.

That is, in addition to the increase in current consumption in communication, the current consumption increases in additional circuits.

Accordingly, the time required for sending and receiving data in one packet is considered to be about 0.1 second when an appropriate communication speed is required, and in the present invention, about 125 KHz may be preferable in consideration of the frequency range permitted by the MIC.

Therefore, in the present invention, when the personal dosimeter is contacted to the reader at a close distance of 1cm to 2m using such low frequency communication, the collected information of the personal dosimeter is wirelessly transmitted and received to the reader, and the information on the reader is transmitted to the personal dosimeter. Two-way communication can be configured to transmit and receive.

The control unit controls to implement a user interface (GUI) such as a door control state, a dosimeter setting on / off, manual entry / exit on / off through a monitor unit,

When the character or picture information previously displayed on the monitor screen is touched through the touch panel 250 by hand, the user inputs a selected item according to the position of the touched screen.

The power supply unit 270 controls to supply 5V and 12V power inside the reader.

In addition, the controller controls the alarm unit 280 to generate a different alarm sound according to contents of an alarm to be notified to the user, that is, dose rate exceeded, cumulative dose exceeded, work time exceeded, and the like through the system operation state display unit 290. Control the user to easily recognize the operating state of the dosimeter.

The communication unit 220 communicates with the device management computer through RS232 / RS485 / ETHERNET.

The RF module 230 is for performing wireless communication with the personal dosimeter using the RF communication method, which is composed of an RF output unit 231 and an RF input unit 232 as shown in FIG. .

The RF output unit 231 transmits the data including the frequency of 50KHz to 500KHz through the output terminal PD1 of the control unit 210 to the antenna of the personal dosimeter through the connector J8 and the connector J7. Do it.

In addition, the RF input unit 232 maintains the antenna of the reader in a high impedance state through the capacitor MC5 and the variable capacitor TRIMMER1, which are resonant circuits, and resonates according to the RF carrier of the personal dosimeter antenna. When the RF signal output from the dosimeter is input through the antenna of the reader, the voltage level is increased and amplified through the first gate circuits U9A and U9B, and the control unit is shaped by the circuits U9C and U9D amplified by the first gate circuit. It serves to input to the input terminal (PD0) of (210).

When the personal dosimeter is contacted to the reader at a distance of 1cm to 2m through the RF output unit 231 and the RF input unit 232, the collected information of the personal dosimeter is wirelessly transmitted and received to the device management computer with the control of the door. There is a number.

As illustrated in FIG. 10, the monitor unit 240 is formed of a large-capacity TFT-LCD and implements a user interface (GUI) such as a door control state, a dosimeter setting on / off, and manual entry / exit on / off. It has the same product specification as 1.

Active Screen Size 6.4 in (163.2 mm) Outlint Dimension 145.5 (W) * 111.5 (H) * 6.0 (H) mm Pixel Pitch 0.204mm * 0.204mm Pixel format 640 (horizontal) * 480 (vertical), RGB stripe array Color depth 6-bit, 262 and 144 colors Luminance (white) 250 cd / ㎡ Power Consumption 2.33 watts weight 135 g Display Operation Mode Transmissive mode, normally white

In addition, an LCD control board is provided at the rear of the monitor to freely express Korean and English, and to implement a GUI-Graphic User Interface.

When the touch panel 250 touches text or picture information previously displayed on the monitor screen by hand, the user's selection is input according to the position of the touched screen, which is attached to the rear surface as shown in FIG. 11. Is connected to the touch screen control board 251.

The keypad 260 is for input and operation required for the operation of the system, which is composed of numerals, figures, and English characters at the lower end of the monitor unit 240, as shown in FIG.

The power supply unit 270 supplies 5V and 12V power to the inside of the reader. As shown in FIG. 12, the power supply unit 270 is connected to an AC 220V and 60Hz power supply so that a 4-pin connector on one side is connected to a circuit inside the reader. The 2 pin connector is connected to a 5V power supply on a circuit inside the reader.

The alarm unit 280 is to generate a different alarm sound according to the contents of the alarm to inform the user, that is, dose rate exceeded, cumulative dose exceeded, working time exceeded, etc., which is shown in Figure 1 keypad ( 260 is configured at one end.

The system operation state display unit 290 is displayed with a plurality of LEDs so that the user can easily recognize the operation state of the dosimeter.

14 is a flowchart illustrating an operation process of a personal dosimeter according to the present invention, in which a counting step (S100), a dose rate, a cumulative dose calculation step (S110), an alarm value comparison step (S120), and a work time calculation step of a user are performed for one second. (S130), work time alarm value comparison step (S140), work time calculation step (S150), LCD display step (S160), LED display step (S170), and DATA storage step (S190), personal dosimeter through the RF module It consists of a two-way wireless communication step (S180) with the reader, and returns to the beginning again after step (S190).

In the alarm value comparison step (S120) and the working time alarm value comparison step (S140), the alarm sound is generated when the dose rate, the cumulative dose, and the working time are equal to or greater than a set value. The sound will tell you the contents of the alarm.

In the present invention, the bidirectional wireless communication step (S180) with the personal dosimeter reader through the RF module in the existing personal dosimeter operation process is included,

When the personal dosimeter is contacted to the reader at a distance of 1cm to 2m, the door number is controlled (open or closed) by inputting the personal number (TLD-ID), and the measurement data of the radiation dose measured by the PIN diode of the personal dosimeter is measured at 50KHz ~ 500KHz. Is sent to the personal dosimeter reader 200,

 Radiation measurement item data, radiation measurement data, dose rate initialization data, dose rate data per unit time, program update data, and various environment setting data are received from the personal dose meter contacting the personal dosimeter reader through the manager computer at 50 KHz to 500 KHz.

Next, the opening and closing of the door through the personal dosimeter and personal dosimeter reader according to the present invention will be described.

FIG. 13 is a diagram illustrating an access state of a personal dosimeter reader using an RF module according to the present invention, and FIG. 15 is a diagram illustrating exposure and access management using two-way RF communication between a personal dosimeter and a reader period according to the present invention. It relates to a flowchart showing the operation process.

The access management system described below refers to a system consisting of a personal dosimeter, a personal dosimetry reader, a door, and a manager computer.

First, when power is applied to the exposure and access control system, the main program starts to operate (S201).

At this time, the status of the current exposure and access control system is displayed on the LCD / LED (S202), when the personal dosimeter is not in contact with the LCD, the initial phrase 'access control system' is displayed on the LCD and the LED is turned on in the READY of the eight LEDs It becomes (S203).

If the dosimeter has not been touched in step S203, the visitor counts to step S213. If the dosimeter is contacted, checks whether the dosimeter enters or exits in step S204. Display the confirmation number input request content and the LED turns on the WAIT (S205).

Waiting for the input of the keypad in step S206, and displays the communication state on the LCD / LED when key input is completed (S207a).

Subsequently, after performing RS232 / RS485 / ETHERNET communication between the manager computer and the access management system (S208a), RF communication is performed between the personal dosimeter and the reader of the personal dosimeter among the access management system (S209a).

Here, the RF communication is because the personal dosimeter and personal dosimeter reader is made of two-way wireless communication rather than one direction,

When the personal dosimeter is contacted to the reader at a distance of 1cm to 2m, the door number is controlled (open or closed) by inputting the personal number (TLD-ID), and the measurement data of the radiation dose measured by the PIN diode of the personal dosimeter is measured at 50KHz ~ 500KHz. Is sent to the personal dosimeter reader 200,

 Radiation measurement item data, radiation measurement data, dose rate initialization data, dose rate data per unit time, program update data, and various environment setting data are received at the personal dosimeter in contact with the personal dosimeter reader through the manager computer at 50 KHz to 500 KHz.

In the case of exiting in step S204, when the key input is completed, the communication state is displayed on the LCD / LED (S207b).

Subsequently, RS232 / RS485 / ETHERNET communication is performed between the manager computer and the access management system (S208b), and then RF communication is performed between the dosimeter and the access management system (S209b).

Check in step S210 whether the data exchanged with the manager computer is not abnormal, and if confirmed, in step S211 the LCD indicates that the RF communication is completed, the LED is ON only OK.

In step S212, the door is opened, and in step S213, the number of persons who have passed through the door is checked.

By using the present invention, when the personal dosimeter is contacted to the reader at a distance of 1cm to 2m by RF communication of 50KHz ~ 500KHz, the collected information of the personal dosimeter is wirelessly transmitted and received to the reader, and the information stored in the reader is returned to the personal dosimeter. It is possible to provide an exposure and access control system using RF communication made of TFT-LCD, which transmits / receives wirelessly in both directions and has a clear image quality even after long use.

Claims (5)

In using the personal dosimeter to expose the radiation, to control and manage the entrance and exit, and to wirelessly transmit and receive the information collected by the dosimeter to the personal dosimeter reader, The personal dosimeter includes a semiconductor detector 110 using a PIN diode which is a semiconductor sensor for precisely detecting high dose radiation, a signal processor 120 for amplifying an electrical signal of the semiconductor detector and generating a pulse signal, and stored in an internal memory. A system control unit 130 for overall control of each component according to a system control program, an RF module 140 for performing two-way wireless communication with the reader using an RF communication method, and output data of the system control unit And a display unit 150 for displaying on the LCD screen, an alarm sound generating unit 160 for notifying a danger when detecting radiation through the control of the system control unit, a switching unit 170 for checking the normal operation of the device and And, and the power supply unit 180 for supplying system power, The personal dosimeter reader 200 uses a control unit 210 for controlling the entire system, a communication unit 220 for selecting and using RS232 / RS485 / ETHERNET for communication with a device management computer, and an RF communication method. RF module 230 for performing wireless communication with the personal dosimeter and a high-capacity TFT-LCD to implement a user interface (GUI) such as door control state, dosimeter setting on / off, manual entry / exit on / off, etc. When the monitor 240 touches the character or picture information previously displayed on the monitor screen by hand, the touch panel 250 in which a user's selection is input according to the position of the touched screen is input, and an input necessary for the operation of the system is input. And a keypad 260 for operation, a power supply unit 270 for supplying 5V and 12V power to the reader, and contents of an alarm to be notified to the user, that is, dose rate exceeded, accumulated dose exceeded, and working time exceeded. And an alarm unit 280 for generating different alarm sounds according to the like, and a display unit 290 for displaying an LED so as to easily recognize an operation state of the personal dosimeter. Exposure and access control device using communication. The connector J8 and the connector J7 of claim 1, wherein the RF module 140 outputs data including a frequency of 50 KHz to 500 KHz through the output terminal P6.0 / A0 of the system controller 130. RF output unit 141 and serves to transmit to the antenna of the reader through; Through the resonant circuit MC5 and the variable capacitor TRIMMER1, the antenna of the personal dosimeter is kept in a high impedance state, and after resonating with the RF carrier of the reader antenna, the RF signal output from the reader is When input through the antenna of the first gate circuit (U9A, U9B) and the voltage level is increased and amplified, and the first gate circuit amplified in the circuit (U9C, U9D) amplified by the input terminal (P6) of the controller 130 .0 / A1) Exposure and access control device using two-way RF communication of the personal dosimeter and reader period, characterized in that consisting of the RF input unit 142 serves to input. According to claim 1, RF module 230 is output via the output terminal (PD1) of the control unit 210 when the data including the frequency of 50KHz ~ 500KHz is output through the connector (J8) and the connector (J7) of the personal dosimeter RF output unit 231 for transmitting to the antenna, The antenna of the reader is maintained in a high impedance state through the capacitor MC5 and the variable capacitor TRIMMER1, and the RF signal output from the personal dosimeter is resonated in accordance with the RF carrier of the personal dosimeter antenna. When input through the antenna of the first gate circuit (U9A, U9B), the voltage level is increased and amplified through the first gate circuit, amplified in the circuit (U9C, U9D) amplified by the input terminal (PD0) of the control unit 210 Exposure and access control device using a two-way RF communication between the personal dosimeter and the reader period, characterized in that consisting of the RF input unit 232 to input. 1 second count step (S100), Dose rate, cumulative dose calculation step (S110), Alarm value comparison step (S120), And calculating the working time of the user (S130), Working time alarm value comparison step (S140), Work time calculation step (S150), LCD display step (S160), LED display step (S170), In the data storage step (S190), Between the step S170 and step S190 includes a two-way wireless communication step (S180) with the personal dosimeter reader through the RF module consists of a personal number (TLD-ID) when contacting the reader at a distance of 1cm ~ 2m ) Is input and the door is controlled (open or closed) and at the same time the measurement data of the radiation dose measured by the PIN diode of the personal dosimeter is transmitted to the personal dosimeter reader 200 at 50KHz ~ 500KHz,  Radiation measurement item data, radiation measurement data, dose rate initialization data, dose rate data per unit time, program update data, and various environment setting data are received at the personal dose meter contacted to the personal dosimeter reader through the manager computer at 50KHz ~ 500KHz. Exposure and access control method using a two-way RF communication between the personal dosimeter and the reader period. When the power is applied to the exposure and access control system step (S201) and start the main program is operated, (S202) the current exposure and the status of the access control system is displayed on the LCD / LED of the personal dosimeter reader, Checking whether the personal dosimeter is in contact with the personal dosimeter reader at a distance of 1 cm to 2 m (S203); When the dosimeter is in contact, checking whether the door is in the entrance or exit state (S204); In the case of entry, the LCD displays a confirmation number input request content and the LED turns on the WAIT (S205); Keypad input step (S206), Performing RS232 / RS485 / ETHERNET communication between the manager computer and the access management system (S208a); Performing RF communication between the personal dosimeter and the personal dosimeter reader in the access control system (S209a); When the key input is completed, displaying the communication state on the LCD / LED (S207a), In step S204, when the key input is completed, displaying the communication state on the LCD / LED (S207b); Performing RS232 / RS485 / ETHERNET communication between the manager computer and the access management system (S208b); Performing RF communication between the dosimeter and the access management system (S209b); Step (S210) and confirming that the data transmitted and received with the manager computer is not abnormal; If it is confirmed, the LCD indicates that the RF communication is completed, and the LED is ON only (ON) (S211) and Opening the door (S212), A method of controlling exposure and access using two-way RF communication between a personal dosimeter and a reader period, characterized in that the step of checking the number of persons passing through the door (S213).

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