KR101919139B1 - Security control apparatus and method thereof - Google Patents

Abstract

A crime prevention control apparatus and method are provided. The security control device includes a sensing signal output unit for receiving a signal output from a first sensing loop among a plurality of sensing loops formed by a plurality of sensors and outputting the sensed signal as a sensing signal, And a state determiner for determining the state of the first sensing loop according to a signal input through the input terminal. The state determination unit checks the state of the first sensing loop after checking whether there is a defect in the input terminal in a check period for checking whether there is a defect.

Description

[0001] SECURITY CONTROL APPARATUS AND METHOD THEREOF [0002]

The present invention relates to a crime prevention control apparatus and a method thereof.

A security system can be a sensor (or sensor device) that can detect an external intrusion into a specific space (for example, inside a building such as an office or a home), and can collect the sensed signal and transmit it to a controller Means a system equipped with a communication system.

1 is a diagram showing a method of checking a detection loop by a security controller included in a security system.

As illustrated in Fig. 1, the crime prevention controller 1 recognizes the state of the detectors 2, 3 and 4 connected to the sensing loop terminal by using the voltage level applied to the M-terminal when voltage is supplied to the B-terminal.

The detectors 2 and 3 are shorted at the boundary and the detector 4 is open so that a sensing loop consisting of the detector 2, the detector 3 and the terminating resistor 5 is formed . If an anomaly is detected in the crime prevention area, the detectors 2 and 3 are opened and the detector 4 is short-circuited. The termination resistor 5 is connected in parallel to the detector 4 and provides a steady state reference voltage level.

The detectors 2, 3 and 4 forming the sensing loop maintain a constant voltage level at the boundary due to the impedance of the sensing circuit constituted in the terminating resistor 5 and in the M stage. When the detector 2 senses the change, the state of the detectors 2 and 3 is opened, so that the supply of the voltage between the sensing stage of the stage B and the sensing loop of the stage M is interrupted and voltage fluctuation occurs at the stage M. Then, the security controller 1 detects that the voltage fluctuation occurred in the open state. Further, when the detector 4 detects a change, the detector 4 is short-circuited, and a voltage fluctuation occurs between the B-stage and the M-stage. Then, the security controller 1 detects a signal in which a voltage fluctuation occurs as a short circuit.

The security controller can be implemented with the structure as described above, and it is possible to sequentially check the sensing loop connected to the detector, judge whether the sensor is short-circuited or not, and transmit the abnormal information to the upper layer. The method controller outputs, for example, a signal of a low level to an upper layer when it is normal, and a signal of a high level to an upper layer when an abnormality occurs.

However, when a failure occurs in the input port of the security controller in which the detection loop signal is inputted, the cause of the failure can not be known, and the non-detection state is maintained even if a detection state such as short / .

For example, if each input port of the method's controller's sensing loop is bad, the sensor connected to the sensing loop senses a change in the value of the sensing loop, May not be aware of changes in the sense loop.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a method and apparatus for accurately detecting changes in a sensing loop by checking occurrence of defects in input ports corresponding to sensing loops.

A security control device according to an embodiment of the present invention includes a sensing signal output unit that receives a signal output from a first sensing loop among a plurality of sensing loops formed by a plurality of sensors and outputs the sensing signal as a sensing signal; And a state determiner for determining a state of the first sensing loop in accordance with a signal input through an input terminal during a check period based on the sensing signal, wherein the state determiner determines, during a check period for checking whether there is a defect, The state of the first sensing loop is determined.

The check period for checking presence / absence of the defect may include a first defect check period for checking whether there is an open defect and a second defect check period for checking whether there is a short defect.

The crime prevention control device may further include: a first comparing unit comparing the voltage of the sensing signal output from the sensing signal output unit with a short-circuit reference voltage to output a first comparison signal; And a second comparison unit comparing the voltage of the sensing signal with an open reference voltage to output a second comparison signal.

In this case, the status determination unit may include a first input terminal receiving the first comparison signal and a second input terminal receiving the second comparison signal, and the first input terminal and the second input terminal The presence or absence of a defect in the first input terminal, the defect in the second input terminal, and the state of the first sensing loop based on a signal input through the first input terminal.

The state judging section judges whether or not the second input terminal is open-defective in the first defect check period, judges whether the first input terminal is short-circuited in the second defect check period, 1 The state of the sensing loop can be determined.

The crime prevention control device includes: a power supply unit for supplying power to the plurality of detectors; And a selection operation unit connected to one of the plurality of sensors and including a plurality of switches for operating the corresponding sensing loop.

In this case, the switch is operated in the first bad check period, and the power supply unit supplies power to the sensor in the second bad check period, and in the last check period, the switch is operated, The controller can supply power to the detector.

The security control device may further include: a loop selector for selecting the first sensing loop among the plurality of sensing loops; And a selection operation unit for operating the first sensing loop by selecting a sensor corresponding to the first sensing loop among the plurality of sensors, 1 detection loop, and output the detection signal.

In this case, the crime prevention control device may further include a comparing unit for comparing the sensing signal output from the sensing signal output unit with a predetermined reference voltage and outputting a comparison signal corresponding to the comparison result to the state determining unit.

According to another aspect of the present invention, there is provided a security control method for a security control device, the security control device comprising: a check period for checking a state of a plurality of sensing loops formed by a plurality of sensors; The method comprising: setting a first check period for checking for the presence or absence of a defect and a second check period for checking the state of the detection loop; Checking whether an input terminal receiving a signal output from the first sensing loop among the plurality of sensing loops is defective in the first check period; And determining the state of the first sensing loop based on a signal output from the first sensing loop among the plurality of sensing loops in the second check period.

The first check period for checking presence / absence of the defect may include a first defect check period for checking whether there is an open defect and a second defect check period for checking whether there is a short defect.

Checking whether there is a defect in the input terminal includes checking whether the input terminal receiving the signal output from the first sensing loop among the plurality of sensing loops is open or not in the first defective check period; And checking whether the input terminal receiving the signal output from the first sensing loop among the plurality of sensing loops has a short circuit defect in the second defect check period.

A first input terminal for receiving a signal corresponding to a result obtained by comparing a signal output from the first sensing loop with a shorted reference voltage, and a second input terminal for comparing a signal output from the first sensing loop with an open reference voltage And a second input terminal receiving a signal corresponding to the result.

Wherein the step of checking for the presence or absence of a defect in the input terminal comprises the steps of: checking whether the opening of the second input terminal is defective in the first defective check period; And checking whether the first input terminal is short-circuited in the second bad check period.

According to the embodiment of the present invention, before the security control apparatus checks the state of the sensing loop, it is first checked whether the input port to which the signal corresponding to the comparison result of the sensing signal corresponding to the sensing loop is inputted, It is possible to reduce the misjudgment that the state of the detection loop is recognized as a normal state due to the failure, and it is possible to grasp the non-sensing state due to the failure of the input port.

In addition, the state of the sensing loop can be accurately determined even if the insulation of the input port is frequently broken due to the breakdown of the insulation such as a short circuit which may occur in the installation work of the sensor. Therefore, the accuracy of the security system using the detection loop can be increased.

1 is a diagram showing a method of a conventional security controller checking a detection loop.
2 is a block diagram showing the structure of a crime prevention system according to an embodiment of the present invention.
3 is a diagram illustrating a detailed structure of a security control device according to an embodiment of the present invention.
4 is an exemplary diagram showing a signal waveform for checking the detection loop by the crime prevention control device.
5 is a diagram illustrating a method of checking a detection loop by the security control apparatus according to an embodiment of the present invention.
FIG. 6 is an exemplary view showing a check result of the sensing loop according to the method of FIG. 5;

Hereinafter, embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention. The present invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein. In order to clearly illustrate the present invention, parts not related to the description are omitted, and similar parts are denoted by like reference characters throughout the specification.

Throughout the specification and claims, when a section is referred to as including an element, it is understood that it may include other elements as well, without departing from the other elements unless specifically stated otherwise.

Furthermore, terms including ordinals such as first, second, etc. used in the embodiments of the present invention can be used to describe elements, but the elements should not be limited by terms. Terms are used only for the purpose of distinguishing one component from another. For example, without departing from the scope of the present invention, the first component may be referred to as a second component, and similarly, the second component may also be referred to as a first component.

Hereinafter, a crime prevention control apparatus and a method thereof according to an embodiment of the present invention will be described.

2 is a block diagram showing the structure of a crime prevention system according to an embodiment of the present invention.

2, the crime prevention system 1 according to the embodiment of the present invention includes a crime prevention control device 10 and a detection unit 20. As shown in Fig.

The sensing unit 20 includes a plurality of sensors 21 (giving a representative numeral "21 " for descriptive convenience). The plurality of detectors 21 may be connected in series or in parallel depending on the kind (or use) thereof. The plurality of detectors 21 may be connected to a reference voltage and may be connected to the reference voltage through a termination resistor.

A plurality of sensing loops may be formed by the plurality of detectors 21. For example, the method system 1 may form eight sense loops or up to 15 sense loops.

The crime prevention control apparatus 10 selectively operates a plurality of sensing loops formed by the plurality of sensors 21 of the sensing unit 20 and generates a signal based on a signal output from the sensing unit 20 through the sensing loop It is determined whether or not the detection loop is short-circuited or open, and whether or not an error has occurred is determined. To this end, the crime prevention control apparatus 10 includes a loop selection unit 11, a detection signal output unit 12, a selection operation unit 13, a comparison unit 14, and a state determination unit 15, And a power supply unit 16 for supplying power to the sensing unit 20.

The loop selector 11 selects a sensing loop to be checked among a plurality of sensing loops formed by the plurality of sensors 21 of the sensing unit 20.

The detection signal output unit 12 is connected to the plurality of detectors 21 and receives signals corresponding to the detection loops formed by the plurality of detectors 21, As shown in Fig. To this end, the sensing signal output section 12 includes a plurality of input ports, that is, a plurality of sensing loop terminals. The number of sensing loop terminals may correspond to the number of detectors 21. And selects and outputs a signal corresponding to the sensing loop selected by the loop selector 11 from signals input through the plurality of sensing loop terminals. The detection signal output unit 12 may be implemented as a MUX IC.

The selection operation section 13 selects the sensor 21 corresponding to the selected sensing loop. The selection operation unit 13 selects the sensor 21 corresponding to the sensing loop selected by the loop selection unit 11 so that the sensing loop is operated. A signal corresponding to an arbitrary sensing loop is input to the detection signal output unit 12 through the loop selection unit 11 and the selection operation unit 12. [

The comparator 14 compares the signal input from the sense signal output unit 12 with a reference voltage and outputs the signal. The comparator 14 compares the input signal with a short circuit reference voltage or an open reference voltage and outputs the comparison result. A signal corresponding to the sensing loop selected by the loop selector 11 and formed by the selection operation section 13 is output through the sensing signal output section 12 and the comparison section 14 outputs the sensing signal output section 12 with a short circuit reference voltage to output a first comparison signal, and also compares an input signal with an open reference voltage to output a second comparison signal.

The state determination unit 15 determines whether the detection loop is short-circuited / open based on the signal input from the comparison unit 14, and determines whether an abnormality has occurred according to the determination result. Based on the first comparison signal and the second comparison signal output from the comparison unit 14, the state determination unit 15 determines whether or not the sensing loop is short-circuited or open. Based on the determination result, . The state determination unit 15 receives the first comparison signal through the first input terminal and receives the second comparison signal through the second input terminal. In particular, the state determination unit 15 according to the embodiment of the present invention can check whether a fault has occurred between the first input terminal and the second input terminal, and determine whether the detection loop is short-circuited or open based on the check.

The state determination unit 15 may be implemented in the form of a processor IC and configured to implement the functions, procedures, and methods of the crime prevention control device 10 described herein. The state determination unit 15 controls each of the components 11, 12, 13, 14 and 16 of the crime prevention control device 10 and detects a signal flow between the components 11, 12, 13, 14, Or a processor that is implemented separately from the state determination unit 15 controls each of the components 11, 12, 13, 14 and 16 and outputs a signal between the components 11, 12, 13, 14, You can also manage the flow.

The power supply unit 16 supplies power to the sensing unit 20 and operates according to an applied control signal to selectively supply power to the sensing unit 20. [ The control signal may be provided from the state determination section 15 or may be provided by a separate control device. The power supply unit 16 is exemplified as existing outside the security control apparatus 10, but may be included in the security control apparatus 10.

The detailed structure of each part of the crime prevention system according to the embodiment of the present invention will be described as follows.

3 is a diagram illustrating a detailed structure of a security system according to an embodiment of the present invention.

As the sensing unit 20 is composed of a plurality of sensors 21, the plurality of sensors 21 may be connected in parallel, for example, as shown in FIG. A plurality of detectors 21 are connected in parallel and a switch 161 of a power supply unit 16 for supplying a voltage to the sensing unit 20 is connected. When the switch 161 is turned on, a voltage is supplied to the sensing unit 20.

8 detection loops (1LOOP, 2LOOP, 3LOOP, 4LOOP, 5LOOP , 6LOOP, 7LOOP, 8LOOP) can be formed by a plurality of detectors (21) as in FIG. The loop selector 11 selects one sensing loop to be checked out of the eight sensing loops 1LOOP, ... 8LOOP thus formed. The loop selector 11 can select a detection loop to check using, for example, a binary coded decimal (BCD) code scheme. For example, when the loop selector 11 desires to select the sensing loop 1 (1LOOP) among the eight sensing loops 1LOOP, ... 8LOOP, the signal A having a low level, the signal B having a low level, And a selection signal ([ABC] = [000]) composed of a signal C having a low level.

Further, the loop selector 11 can sequentially select the eight sensing loops 1LOOP, ... 8LOOP. The loop selector 11 may sequentially select a sensing loop to be checked using the BCD code scheme. For example, among the eight sensing loops 1LOOP, ... 8LOOP, the sensing loop 2 (2LOOP), the sensing loop 4 ([ABC] ([ABC]) consisting of a signal A having a low level, a signal B having a low level, and a signal C having a high level in time in order to sequentially select the detection loop 7 (7LOOP) ([ABC] = [011]) composed of a signal A having a low level, a signal B having a high level, and a signal C having a high level, and a signal A having a high level, The selection signal 3 ([ABC] = [110]) composed of the signal B having the high level and the signal C having the low level can be sequentially output to the detection signal output section 12. [

The sensing signal output section 12 includes eight sensing terminals (M-01 terminal, M-02 terminal, ..., M-08 terminal) corresponding to the eight sensing loops 1LOOP, ... 8LOOP. The eight sensing terminals (M-01 terminal, M-02 terminal, ..., M-08 terminal) are connected to the respective detectors 21 of the sensing section 20. The detection signal output unit 12 selects and outputs a signal input through the detection terminal of the corresponding sensing loop according to the selection signal ABC output from the loop selection unit 11. [ For example, when the selection signal 1 ([ABC] = [001]) is input, the sensing signal output section 12 selects and outputs a signal input through the sensing terminal (M-02 terminal). When the selection signal 1 ([ABC] = [001]), the selection signal 2 ([ABC] = [011]) and the selection signal 3 ([ABC] = 110) are sequentially inputted, (M-02 terminal), a sensing terminal (M-04 terminal), and a sensing terminal (M-07 terminal).

On the other hand, the selection operation section 13 can select the sensor 21 corresponding to the selected sensing loop so that the sensing loop selected by the loop selecting section 11 is operated. For example, when the detection loop 1 (1LOOP) is selected by the loop selector 11, the detector 21 corresponding to the selected detection loop 1 (1LOOP) is selected so that the detection loop 1 (1LOOP) do.

To this end, the selection operation unit 13 may include a plurality of switches 131 connected to the respective detectors 21, as shown in FIG. For example, each switch 131 is operated in such a manner that the switch connected to the detector corresponding to the selected sensing loop is turned on and the switch corresponding to the remaining sensor is turned off, Lt; / RTI > A signal corresponding to the selected sensing loop is input to one of eight sensing terminals (M-01 terminal, M-02 terminal, ..., M-08 terminal) of the sensing signal output section 12 according to the operation of the switch 131 Is input to the sensing terminal.

The detection signal output unit 12 outputs the detection signal generated by the selected detection loop according to the operation of the loop selection unit 11 and the selection operation unit 12 as described above. For example, when the sensing loop 1 (1LOOP) is selected and operated, the sensing signal output unit 12 selects a signal input through the sensing terminal (M-01 terminal) and outputs it as a sensing signal.

The comparator 14 includes a first comparator 141 and a second comparator 142.

The first comparator 141 compares the voltage of the sense signal with a short-circuit reference voltage (e.g., 8V) to output a first comparison signal. The second comparator 142 compares the voltage of the sense signal with an open reference voltage (e.g., 2V) and outputs a second comparison signal.

3, the state determination unit 15 includes a first input terminal SHORT for receiving a first comparison signal and a second input terminal OPEN for receiving a second comparison signal, Based on the signal input through the terminal SHORT and the second input terminal OPEN, the state of the sensing loop that generated the sensing signal is determined.

The state determination unit 15 generates a sense signal based on the first comparison signal and the second comparison signal that are output from the comparison unit 14 and input through the first input terminal SHORT and the second input terminal OPEN It is determined whether a detection loop corresponds to a short-circuit state, an open state, or a normal state. Specifically, the state determination unit 15 determines whether the detection signal is a short-circuit signal (a signal generated by the short-circuiting sensor 21), an open signal (a signal generated by the open-state sensor 21) It can be determined whether the signal is a normal signal. More specifically, when the voltage of the first sensing signal is higher than the short-circuit reference voltage (or the voltage range) based on the first comparison signal, the state determining unit 15 determines that short- If the voltage of the first sensing signal is lower than the open reference voltage (or the voltage range), it is determined that the opening sensing has been performed. If the voltage of the first sensing signal is within the normal range (e.g., 4V to 5V) . Here, the state determiner 15 may determine that the first comparison signal and the second comparison signal are in a normal state when the comparison signal is at a LOW level.

4 is an exemplary diagram showing a signal waveform for checking the detection loop by the crime prevention control device. Specifically, in FIG. 4, the security control apparatus 10 sequentially detects the detection loop 3 (3LOOP), the detection loop 5 (5LOOP), and the detection loop 8 (LOOP) out of the eight detection loops The result of the check is shown.

The crime prevention control apparatus 1 sequentially checks the detection terminals (M-03 terminal, M-05 terminal, and M-08 terminal) in the structure shown in FIG. 3 to judge whether the corresponding sensing loop is short- , The sensing loop 3 (3LOOP) is in an open (OPEN) state, the sensing loop 5 (5LOOP) is in a shorting state and the sensing loop 8 (LOOP) is in a short ) State.

However, it can be judged that the detection loop 3 (3LOOP), the detection loop 5 (5LOOP), and the detection loop 8 (LOOP) are still in a normal state as shown in FIG. In this case, the first comparison signal outputted from the first comparing unit 141 of the comparing unit 14 and the second comparing signal outputted from the second comparing unit 142 are maintained at the low level. At this time, when a failure occurs in the input port of the state determination unit 15, that is, the first input terminal SHORT and the second input terminal OPEN, the first input terminal SHORT and the second input terminal OPEN ) Becomes a low level. Therefore, even if a voltage change occurs in the sensing loops 3LOOP, 5LOOP, and 8LOOP by sensing, the low level is maintained due to the failure of the first input terminal SHORT and the second input terminal OPEN, The portion 15 can be mistaken as being in a steady state. That is, the state determiner 15 may misjudge the non-sensing state even though the sensing has occurred due to the failure of the input port.

Therefore, in the embodiment of the present invention, the security control device checks the detection loop as follows.

The crime prevention control device 10 sets a check period for checking the state of the detection loop, for example, the check period may be 20 ms. The security control device 10 checks the state of the detection loop in the check period. Here, the crime prevention control device 10 checks the state of the detection loop by selecting the detection loop as described above, selecting the signal input from the detection unit 20 through the detection terminal corresponding to the selected detection loop And outputting the selected signal as a detection signal, and determining the state (short-circuit state, open state, steady state) of the selected detection loop based on the detection signal.

The crime prevention control device 10 checks the state of an arbitrary sensing loop at the check point in the check period. When checking the states of a plurality of sensing loops, as described above, the security control device 10 can sequentially perform checks on a plurality of sensing loops using a BCD code scheme.

In the embodiment of the present invention, as described above, in order to prevent the input port from being misdetected due to the failure of the input port, a check period for checking whether the check period is defective, a check period for checking the state of the detection loop . The check period for checking whether there is a defect is divided into a check period for checking whether there is an open defect and a check period for checking whether there is a short defect. Here, for convenience of explanation, a check period for checking presence or absence of opening is referred to as a first check defective period, and a second check defective period for checking whether there is a short fault. The check period for checking whether or not the detection loop is actually detected is referred to as a final check period. Here, the presence or absence of short-circuit failure indicates the presence or absence of a failure of the first input terminal (SHORT) of the state determination unit (15), and the presence or absence of an open failure indicates a failure of the second input terminal (OPEN) of the state determination unit (15).

Specifically, in order to check whether the detection signal of the short / open of the sensing loop is normally checked and input within the check period for checking the state of the sensing loop, it is checked whether the input port is defective or not, do. When the check period is, for example, 20 ms, the check period of 20 ms is divided into a first bad check period of 5 ms, a second bad check period of 5 ms, and a last check period of 10 ms.

5 is a diagram illustrating a method of checking a detection loop by the security control apparatus according to an embodiment of the present invention. Specifically, FIG. 5 shows a control signal operation for sensing loop control for the crime control device 10 to check the state of the sensing loop.

FIG. 6 is an exemplary view showing a check result of the sensing loop according to the method of FIG. 5; Specifically, FIG. 6 shows a result of sequentially checking the sensing loop during the check period by the control signals illustrated in FIG. 5 by the security control device 10. FIG.

5, the crime prevention control apparatus 10 operates the switch 131 of the selection operation section 13 in the first failure check period (5 ms) to check whether there is an open failure. In the second failure check period The switch 161 of the power supply unit 16 connected to the sensing unit 20 is operated to check whether there is a short circuit. Then, both the switch 131 and the switch 161 are operated in the third check period (10 ms) to check the state of the detection loop.

Specifically, the crime prevention control device 10 selects a detection loop (for example, 1LOOP) to be checked through a selection signal (for example, [000]) and responds to the sensor forming the detection loop selected in the first failure check period (For example, (1)), and checks whether there is an open failure. If only the switch 131 connected to the detector forming the selected sensing loop is operated while the switch 161 for supplying power to the sensing unit 20 is turned off in the first failure check period, Level signal through the second input terminal OPEN of the state determination unit 15 through the second input terminal OPEN. The state determining unit 15 can determine that the port state of the second input terminal OPEN is normal when a high level signal indicating the open state is input in the first failure check period (see FIG. 6). On the other hand, if a low level signal is input through the second input terminal OPEN in the first failure check period, it can be determined that a failure occurs in the second input terminal OPEN.

In the second failure check period after the first failure check period, the crime prevention control device 10 operates the switch 161 (for example, ⑨) to check whether there is a short fault. Only the switch 161 for supplying power to the sensing unit 20 is turned on in the second failure check period and the switch 131 connected to the sensor forming the selected sensing loop is turned off, A high level signal is input through the first input terminal SHORT of the determination unit 15. [ The state determining unit 15 can determine that the port state of the first input terminal SHORT is normal when the high-level signal indicating the short-circuited state is input in the second bad check period (see FIG. 6). On the other hand, when a low level signal is input through the first input terminal SHORT in the second failure check period, it can be determined that a failure has occurred in the first input terminal SHORT.

After the first and second bad check periods have elapsed, the crime prevention control device 10 operates the switch 131 (for example, ①) and operates all the switches 161 for supplying power to the sensing unit 20 (Eg, ⑨), the selected sensing loop is activated, and then the state of the sensing loop is checked.

This checking process is applied to the other sensing loops 2LOOP to 8LOOP in the same manner to check whether the input port (first input terminal (SHORT), second input terminal (OPEN)) is defective And then check the state of the detection loop.

In the checking process described above, the first defect check period for checking whether there is an open defect is performed first and then the second defect check period for checking whether there is a short fault is performed. However, the present invention is not limited thereto The first bad check period may be performed first, and then the first bad check period may be performed.

In the embodiment of the present invention, before checking the state of the sensing loop, an input port (a first input terminal SHORT, a second input terminal OPEN) for receiving a signal according to a comparison result of a sensing signal corresponding to a sensing loop, ), It is possible to reduce the misjudgment that the state of the sensing loop is recognized as a normal state due to the failure of the input port and to grasp the non-sensing state due to the failure of the input port.

While the present invention has been particularly shown and described with reference to exemplary embodiments thereof, it is to be understood that the invention is not limited to the disclosed exemplary embodiments, It belongs to the scope of right.

Claims (14)

A sensing signal output unit receiving a signal output from a sensing loop selected from among a plurality of sensing loops formed by a plurality of sensors and outputting the sensing signal as a sensing signal;
A state determiner for determining a state of the selected one of the sensing loops according to a signal input through the first input terminal and the second input terminal during the check period based on the sensing signal;
A power supply for supplying power to the plurality of detectors, the power supply including a first switch; And
And a plurality of second switches connected to one of the plurality of detectors to operate the corresponding sensing loop,
Lt; / RTI >
Wherein the check period includes a defect check period for checking whether there is a defect in the first input terminal and the second input terminal, and a final check period for checking the state of the detection loops,
Wherein the state determination unit operates the first switch and the second switch in the failure check period to determine whether there is a failure in the first input terminal and a failure in the second input terminal, And determines the state of the detection loop. The method according to claim 1,
Wherein the failure check period includes a first failure check period for checking whether the second input terminal is open or not and a second failure check period for checking whether there is a short circuit failure of the first input terminal,
Wherein the state determination unit turns on one second switch among the plurality of second switches and turns off the first switch to determine whether the second input terminal is open or not, Wherein the first switch is turned off and one of the plurality of second switches is turned off and the first switch is turned on to determine whether the first input terminal is short-circuited. 3. The method of claim 2,
A first comparator for comparing a voltage of the sense signal output from the sense signal output unit with a short circuit reference voltage to output a first comparison signal; And
A second comparator for comparing the voltage of the sense signal with an open reference voltage to output a second comparison signal,
Further comprising:
Wherein the first comparison signal is input to the first input terminal of the state determination unit and the second comparison signal is input to the second input terminal of the state determination unit. The method of claim 3,
The state determination unit may determine,
If it is determined that the port state of the second input terminal is normal if the signal input through the second input terminal in the first bad check period is a signal indicating the open state,
And determines that the port state of the first input terminal is normal if the signal input through the first input terminal in the second bad check period is a signal indicating a short-circuited state. delete delete 3. The method of claim 2,
A second switch connected to a sensor corresponding to the selected sensing loop among the plurality of second switches is turned on in the first bad check period,
The first switch is turned on in the second bad check period to supply power from the power supply unit to the plurality of detectors,
The second switch connected to the detector corresponding to the selected sensing loop is turned on and the first switch is turned on so that the power from the power supply is supplied to the plurality of detectors. The method according to claim 1,
A loop selection unit for selecting one sense loop among the plurality of sense loops,
Further comprising:
Wherein the selection operation unit operates the selected sensing loop by selecting a sensor corresponding to the sensing loop selected by the loop selecting unit among the plurality of sensors,
Wherein the detection signal output unit receives a signal output from the detection loop selected by the loop selection unit and outputs the signal as a detection signal. 9. The method of claim 8,
A comparing unit comparing the sensing signal output from the sensing signal output unit with a set reference voltage and outputting a comparison signal corresponding to the comparison result to the status determining unit,
Further comprising: A security control method for a security control device,
Wherein the crime prevention control device comprises: a check period for checking a state of a plurality of sensing loops formed by the plurality of sensors; and the check period is a period during which the signal output from one of the plurality of sensing loops is received Setting a failure check period for checking whether there is a defect in the first input terminal and the second input terminal and a final check period for checking the state of the detection loop;
A first switch that supplies power to the plurality of detectors and a second switch that is connected to one of the plurality of detectors to operate the sense loop during the bad check period, And checking whether there is a defect in the second input terminal; And
Determining a state of the one sensing loop based on a signal output from the sensing loop of one of the plurality of sensing loops during the last check period
And the security control method. 11. The method of claim 10,
Wherein the failure check period includes a first failure check period for checking whether the second input terminal is open or not and a second failure check period for checking whether there is a short circuit failure of the first input terminal,
The step of checking for the presence /
Turning on the second switch and turning off the first switch in the first bad check period to determine whether the second input terminal is open or not; And
Determining whether the first input terminal is short-circuited by turning off the second switch and turning on the first switch in the second bad check period
And the security control method. delete 12. The method of claim 11,
Wherein the first input terminal is an input terminal to which a signal corresponding to a result of comparing the signal output from the one sensing loop with a short circuit reference voltage is input and the second input terminal is a signal output from the one sensing loop And an input terminal for receiving a signal corresponding to a result of comparison with the open reference voltage. 14. The method of claim 13,
The determining whether or not the second input terminal is open may include determining that the port state of the second input terminal is normal if the signal input through the second input terminal in the first defective check period is a signal indicating an open state However,
The step of determining whether or not the first input terminal is short-circuited may include determining that the port state of the first input terminal is normal if the signal input through the first input terminal in the second bad check period is a signal indicating a short- Judging, crime prevention control method.

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