Multi-state alarm control system and control method thereof

Abstract

The invention provides a multi-state alarm control system, which comprises an alarm input module, a control module, a multi-state detection circuit and a control module, and is characterized in that the alarm input module is provided with a multi-state detection input port, and the multi-state detection input port is electrically connected with the control module through the multi-state detection circuit; the multi-state detection input port is used for sending an intrusion alarm signal, an anti-disassembly alarm signal and a fault alarm signal to the control module; the multi-state detection circuit is used for dividing a power supply voltage into voltages with different values within an acquisition range of the control module when the power supply voltage higher than a rated voltage of the alarm input module is accessed, and the voltages are respectively accessed to different pins of the control module through the multi-state detection input port. According to the technical scheme, intrusion alarm signals, anti-disassembly alarm signals and fault alarm signals are identified, the wiring number and difficulty can be greatly reduced, the front-end wiring and construction cost can be reduced in a nuclear facility security scene, and the use efficiency of an alarm input port is improved.

Description

Technical Field

[0001] The present invention relates to the technical field of intrusion detection, and in particular to a multi-state alarm control system and a control method thereof. Background Art

[0002] In nuclear facility security scenarios, multiple intrusion detectors are usually installed around the perimeter of the facility.

[0003] However, the existing alarm controller can only receive one alarm signal on one alarm input port, while the front-end alarm input detector usually has three alarm signals: intrusion, anti-dismantling, and fault. Each alarm signal requires two connecting wires and occupies one alarm input port. In this way, connecting an intrusion detector requires connecting 6 wires, occupying 3 alarm input ports. The project site needs to connect a large number of detectors, so the number of alarm input ports of the alarm controller is relatively large, and the cost and difficulty of on-site wiring are also increased. Summary of the invention

[0004] The object of the present invention is to provide a multi-state alarm control system and a control method thereof, so as to solve the problem of a large number of wiring connections, increased wiring cost and difficulty in the alarm controller of the prior art mentioned in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a multi-state alarm control system, comprising: a control module, an alarm output module electrically connected to the control module, and a plurality of alarm input modules electrically connected to the control module, the control module being used to receive the alarm signal of the alarm input module and send an alarm instruction to the alarm output module; the alarm input module having a multi-state detection input port, the multi-state detection input port being electrically connected to the control module through a multi-state detection circuit, wherein the multi-state detection input port is used to send an intrusion alarm signal, an anti-dismantling alarm signal, and a fault alarm signal to the control module; the multi-state detection circuit is used to divide the supply voltage into voltages of different values ​​within the range that the control module can collect when a supply voltage higher than the rated voltage of the alarm input module is connected, and respectively connected to different pins of the control module through the multi-state detection input port to identify the intrusion alarm signal, the anti-dismantling alarm signal, and the fault alarm signal.

[0006] Optionally, the supply voltage ranges from 11V to 12V, and the supply voltage is 2.5 to 3 times the rated voltage of the alarm input module.

[0007] Optionally, when the multi-state detection circuit is connected to the power supply voltage, the first resistor R59, the fuse F15, and the intrusion detector J4 are connected in sequence, and the voltage is divided between the first resistor R59 and the fuse F15 through the second resistor R61 and the third resistor R65, and are respectively connected to different pins of the control module.

[0008] Optionally, the multi-state detection circuit connects a first transient suppression diode D10 and a second transient suppression diode TVS13 to eliminate interference sources before and after voltage division, respectively, and connects a clamping diode D9 to ensure that the voltage received by the control module is within a collectible range.

[0009] Optionally, it also includes: a communication module and / or a dial switch electrically connected to the control module.

[0010] On the other hand, the present invention also provides a multi-state alarm control method based on the above-mentioned multi-state alarm control system, the method comprising: controlling a number of alarm input modules to continuously collect alarm signals multiple times at preset time intervals, and at the same time dividing the voltage of the alarm signal through a multi-state detection circuit into different values ​​within the collectible range of the control module and mapping them into the control module; establishing an array to pre-process the collected voltage values; and issuing an alarm if the voltage value exceeds a preset intrusion alarm range, a preset anti-dismantling alarm range or a preset fault alarm range.

[0011] Optionally, the step of establishing an array and preprocessing the collected voltage values ​​includes: establishing an array of size n, filling in a new value at every interval of t0, and discarding the oldest value; sorting the array from small to large, adjusting the maximum and minimum values ​​to be discarded, and calculating the average value of the sorted array, and the calculation formula is B=(A(m)+A(m+1)+A(m+2)+…+A(nm-1)) / (n-2*m), where B is the output value, n is the size of the array, and m is the smallest m values ​​and the largest m values ​​to be discarded.

[0012] Optionally, the output value B is judged k times in a row, and when the output value B is in the updated intrusion alarm range, the preset anti-dismantling alarm range or the preset fault alarm range for k consecutive times, an alarm is issued.

[0013] Optionally, a hysteresis value is added to the preset intrusion alarm range, the preset anti-dismantling alarm range and the preset fault alarm range, and when the value of the output value B exceeds the range and the hysteresis value of the initial state, the state is switched.

[0014] Compared with the prior art, the present invention has the following beneficial effects:

[0015] The traditional alarm controller has one alarm input port that can only receive one alarm signal, while the present application electrically connects the polymorphic detection input port to the control module through a polymorphic detection circuit, and when the polymorphic detection circuit is connected to a power supply voltage higher than the rated voltage of the alarm input module, the power supply voltage is divided into voltages of different values ​​within the range that the control module can collect, and the voltages are respectively connected to different pins of the control module through the polymorphic detection input port to identify intrusion alarm signals, anti-dismantling alarm signals, and fault alarm signals. This can greatly reduce the number and difficulty of wiring, and can reduce front-end wiring and construction costs in nuclear facility security scenarios, thereby improving the utilization efficiency of the alarm input port. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 Schematic diagram of the multi-state detection circuit of the present invention.

[0017] Figure 2 The figure is a schematic diagram of the steps of the polymorphic detection alarm method of the present invention. DETAILED DESCRIPTION

[0018] The scheme of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0019] It should be noted that the terms "first", "second", etc. in the specification and claims of the present application and the above-mentioned drawings are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequential order. It should be understood that the data used in this way can be interchanged where appropriate, so that the embodiments of the present application described here. In addition, the terms "including" and "having" and any of their variations are intended to cover non-exclusive inclusions, for example, a process, method, system, product or device comprising a series of steps or units is not necessarily limited to those steps or units clearly listed, but may include other steps or units that are not clearly listed or inherent to these processes, methods, products or devices.

[0020] It will be understood by those skilled in the art that, unless expressly stated, the singular forms "one", "said", and "the" used herein may also include plural forms. It should be further understood that the term "comprising" used in the specification of the present application refers to the presence of features, integers, steps, operations, elements and / or components, but does not exclude the presence or addition of one or more other features, integers, steps, operations, elements, components and / or groups thereof. It should be understood that when we refer to an element as being "connected" or "coupled" to another element, it may be directly connected or coupled to the other element, or there may be an intermediate element. In addition, the "connection" or "coupling" used herein may include wireless connection or wireless coupling. The term "and / or" used herein includes all or any unit and all combinations of one or more associated listed items.

[0021] It will be understood by those skilled in the art that, unless otherwise defined, all terms (including technical and scientific terms) used herein have the same meaning as those generally understood by those skilled in the art to which this application belongs. It should also be understood that terms such as those defined in general dictionaries should be understood to have meanings consistent with those in the context of the prior art, and will not be interpreted with idealized or overly formal meanings unless specifically defined as here.

[0022] It should be understood that the sequence numbers and sizes of the steps in this embodiment do not mean the order of execution. The execution order of each process is determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiment of the present application.

[0023] It should be noted that, in the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0024] A multi-state alarm control system comprises: a control module, an alarm output module electrically connected to the control module, and a plurality of alarm input modules electrically connected to the control module, wherein the control module is used to receive the alarm signal of the alarm input module and send an alarm instruction to the alarm output module; the alarm input module has a multi-state detection input port, and the multi-state detection input port is electrically connected to the control module through a multi-state detection circuit, wherein the multi-state detection input port is used to send an intrusion alarm signal, an anti-dismantling alarm signal, and a fault alarm signal to the control module; the multi-state detection circuit is used to divide the supply voltage into voltages of different values ​​within the range that the control module can collect when a supply voltage higher than the rated voltage of the alarm input module is connected, and respectively connected to different pins of the control module through the multi-state detection input port, so as to identify the intrusion alarm signal, the anti-dismantling alarm signal, and the fault alarm signal.

[0025] Specifically, the current front-end intrusion detectors all give out standard switch signals, and conventional alarm input detection mostly determines whether the switch signal is in a closed state or an open state by detecting the high and low levels of the IO port. The disadvantage of this method is that one input port can only detect one switch signal; the input detection circuit of the present invention adopts an AD voltage detection method, and combines with the terminal interface board to cleverly convert the multi-channel switch signals of the intrusion detector into different voltage values, so that the input detection circuit can identify different alarm signals.

[0026] It can be understood that one alarm input port of a traditional alarm controller can only receive one alarm signal, while the present application electrically connects the polymorphic detection input port to the control module through a polymorphic detection circuit, and when the polymorphic detection circuit is connected to a power supply voltage higher than the rated voltage of the alarm input module, the power supply voltage is divided into voltages of different values ​​within the range that the control module can collect, and is respectively connected to different pins of the control module through the polymorphic detection input port to identify intrusion alarm signals, anti-dismantling alarm signals, and fault alarm signals, which can greatly reduce the number and difficulty of wiring, and can reduce front-end wiring and construction costs in nuclear facility security scenarios, and improve the utilization efficiency of the alarm input port.

[0027] In some embodiments, the supply voltage ranges from 11V to 12V, and the supply voltage is 2.5 to 3 times the rated voltage of the alarm input module.

[0028] Specifically, the power supply voltage is increased to be greater than the rated voltage of the alarm input module and is set to 11V-12V. This can ensure that different voltage values ​​have sufficient resolution after voltage division. If the power supply voltage is too high, the polymorphic detection effect is not sensitive. If the power supply voltage is too low, false alarms are likely to occur. For example, the alarm input module has a total of 8 channels, all of which are polymorphic detection input ports. Each input port can simultaneously receive three alarm signals: intrusion, anti-dismantling, and fault. The entire detection circuit is powered by a power supply voltage of 12V, which is higher than the rated voltage of the alarm input module. This can ensure that different voltage values ​​have sufficient resolution and avoid line voltage interference caused by excessive wiring. The first resistor R59, the second resistor R61, and the third resistor R62 are The three resistors R65 and the terminal interface board form a voltage divider circuit to convert the voltage into a range that can be collected by the single-chip AD. The fault voltage value is 0V, the normal voltage value is 4.2V, the intrusion voltage value is 8.6V, and the anti-dismantling voltage value is 12V. The voltages converted by the voltage divider circuit into voltages that can be recognized by the single-chip microcomputer are: fault 0V, normal 1.2V, intrusion 2.2V, and anti-dismantling 3.3V. The voltage value design of the four states basically adopts an average distribution strategy to ensure that the voltage value of each state has enough margin. The voltage values ​​of these four states are not fixed, and the voltage fluctuations will occur with the differences in the consistency of components of each device, changes in on-site environmental factors, fluctuations in the mains voltage, and the influence of on-site electromagnetic interference.

[0029] In some embodiments, when the multi-state detection circuit is connected to the power supply voltage, the first resistor R59, the fuse F15, and the intrusion detector J4 are connected in sequence, and the voltage is divided between the first resistor R59 and the fuse F15 through the second resistor R61 and the third resistor R65, and are respectively connected to different pins of the control module.

[0030] Specifically, the second resistor R61 and the third resistor R65 are current limiting resistors that play the role of isolation and current limiting.

[0031] In some embodiments, the multi-state detection circuit connects the first transient suppression diode D10 and the second transient suppression diode TVS13 to eliminate interference sources before and after voltage division, respectively, and connects the clamping diode D9 to ensure that the voltage received by the control module is within the collectible range.

[0032] Specifically, D9 is a clamping diode, which ensures that the voltage of the AD port of the microcontroller will not exceed 3.3V, nor be lower than 0V, so as to protect the AD port of the microcontroller from being damaged. D10 and TVS13 are transient suppression diodes, which are used to eliminate interference signals on the alarm line, of which TVS13 eliminates the interference source before voltage division, and D10 eliminates the interference source after voltage division. F15 is a self-recovery fuse, which can suppress the external illegal large current injection and thus damage the equipment. Z2 is a varistor, which has a lightning protection function when combined with F15.

[0033] In some embodiments, it also includes: a communication module and / or a dial switch electrically connected to the control module.

[0034] Specifically, the network module, RS485 module, and wireless Lora module are all communication modules. The network module is responsible for communicating with the alarm controller management software, and the RS485 module and wireless Lora module are responsible for communication between the master and the extension. The dip switch is a 4-bit address selection switch used for slave address selection. If the address is 0, it means working in host mode, otherwise it works in slave mode. Users can flexibly network according to actual conditions. All polymorphic alarm controllers can work in host mode and communicate directly with the alarm controller management software over the network. Some polymorphic alarm controllers can also work in extension mode. The master-slave communication can be RS485 or wireless Lora. The alarm events of the slaves are forwarded to the alarm controller management software through the host.

[0035] On the other hand, the present invention also provides a multi-state alarm control method based on the above-mentioned multi-state alarm control system, the method comprising: controlling a number of alarm input modules to continuously collect alarm signals multiple times at preset time intervals, and at the same time dividing the voltage of the alarm signal through a multi-state detection circuit into different values ​​within the collectible range of the control module and mapping them into the control module; establishing an array to pre-process the collected voltage values; and issuing an alarm if the voltage value exceeds a preset intrusion alarm range, a preset anti-dismantling alarm range or a preset fault alarm range.

[0036] Specifically, since this device has a total of 8 multi-state alarm input ports, that is, 8-channel AD acquisition is performed, the conventional practice is to collect the 8 channels in turn, but because the alarm signal is triggered randomly, there is a risk of missed detection. Therefore, we adopt the method of mapping the acquisition results of the 8-channel AD directly to the memory, so that there will be no missed reading.

[0037] In some embodiments, the step of establishing an array and preprocessing the collected voltage values ​​includes: establishing an array of size n, filling in a new value at every interval of t0, and discarding the oldest value; sorting the array from small to large, adjusting the maximum and minimum values ​​to be discarded, and calculating the average value of the sorted array, and the calculation formula is B=(A(m)+A(m+1)+A(m+2)+…+A(nm-1)) / (n-2*m), where B is the output value, n is the size of the array, and m is the smallest m values ​​and the largest m values ​​to be discarded.

[0038] In some embodiments, the output value B is judged k times in a row, and when the output value B is in the updated intrusion alarm range, the preset anti-dismantling alarm range or the preset fault alarm range for k consecutive times, an alarm is issued.

[0039] Specifically, in the actual use environment, there are various unstable interferences on the detector connection line, and AD detection is prone to misreading. Therefore, in order to avoid misreading and false alarm problems, we first establish an array of size n, put the collected data into the array at intervals of t0, and take the average of all data as the output value before the array is filled; after the array is filled, the oldest data is removed every t0 time, and the latest data is filled in, and then the array is sorted from small to large. The sorted array is A(0) to A(n-1), and then the sorted array is calculated. The calculation formula is as follows: B=(A(m)+A(m+1)+A(m+2)+…+A(nm-1)) / (n-2*m). Where B is the output value of the filter, n represents the array size, m represents the smallest m values ​​and the largest m values ​​that need to be eliminated, and the remaining values ​​are averaged once to obtain the final output value B; by adjusting the parameters n and m, the smoothness and response speed of the output can be adjusted, and finally the parameters suitable for the on-site environment can be integrated, and the output value is judged k times in a row. Only when the output is k times in a row within the new state range can it be judged that the state has changed, otherwise the state remains unchanged, and a single state change is treated as interference, which can further smooth the data and reduce the impact of random fluctuations.

[0040] In some embodiments, a hysteresis value is added to the preset intrusion alarm range, the preset anti-dismantling alarm range and the preset fault alarm range, and when the value of the output value B exceeds the range and the hysteresis value of the initial state, the state is switched.

[0041] The above are only embodiments of the present invention, and are not intended to limit the patent scope of the present invention. Any equivalent transformations made using the contents of the specification and drawings of the present invention, or directly or indirectly applied in related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A multi-state alarm control system, comprising: A control module, an alarm output module electrically connected to the control module, and a plurality of alarm input modules electrically connected to the control module, wherein the control module is used to receive an alarm signal from the alarm input module and send an alarm instruction to the alarm output module; It is characterized in that the alarm input module has a multi-state detection input port, which is electrically connected to the control module through a multi-state detection circuit, wherein the multi-state detection input port is used to send an intrusion alarm signal, an anti-disassembly alarm signal, and a fault alarm signal to the control module; The polymorphic detection circuit is used to divide the supply voltage into voltages of different values ​​within the range that the control module can collect when a supply voltage higher than the rated voltage of the alarm input module is connected, and to connect to different pins of the control module through the polymorphic detection input port respectively, so as to identify intrusion alarm signals, anti-dismantling alarm signals, and fault alarm signals.

2. The multi-state alarm control system according to claim 1, characterized in that: The supply voltage ranges from 11V to 12V, and the supply voltage is 2.5 to 3 times the rated voltage of the alarm input module.

3. The multi-state alarm control system according to claim 2, characterized in that: When the multi-state detection circuit is connected to the power supply voltage, the first resistor R59, the fuse F15, and the intrusion detector J4 are connected in sequence, and the voltage is divided between the first resistor R59 and the fuse F15 through the second resistor R61 and the third resistor R65, and respectively connected to different pins of the control module.

4. The multi-state alarm control system according to claim 3, characterized in that: The multi-state detection circuit connects the first transient suppression diode D10 and the second transient suppression diode TVS13 to eliminate interference sources before and after voltage division respectively, and connects the clamping diode D9 to ensure that the voltage received by the control module is within the collectible range.

5. The multi-state alarm control system according to claim 4, characterized in that: Also includes: A communication module and / or a DIP switch electrically connected to the control module.

6. A multi-state alarm control method based on the multi-state alarm control system according to any one of claims 1 to 5, characterized in that: The method comprises: Controlling a plurality of alarm input modules to continuously collect alarm signals for multiple times at preset intervals, and at the same time dividing the voltage of the alarm signals into different values ​​within the collection range of the control module through a polymorphic detection circuit and mapping them into the control module; Establish an array and pre-process the collected voltage values; If the voltage value exceeds a preset intrusion alarm range, a preset anti-dismantle alarm range or a preset fault alarm range, an alarm is triggered.

7. The multi-state alarm control method according to claim 6, characterized in that: The step of establishing an array and preprocessing the collected voltage values ​​includes: Create an array of size n, fill in a new value every t0 time interval, and remove the oldest value; Sort the array from small to large, adjust the maximum and minimum values ​​that need to be eliminated, and calculate the average value of the sorted array. The calculation formula is B=(A(m)+A(m+1)+A(m+2)+…+A(nm-1)) / (n-2*m), where B is the output value, n is the size of the array, and m is the smallest m values ​​and the largest m values ​​that need to be eliminated.

8. The multi-state alarm control method according to claim 7, characterized in that: The output value B is judged k times in a row. When the output value B is in the updated intrusion alarm range, the preset anti-dismantling alarm range or the preset fault alarm range for k consecutive times, an alarm is issued.

9. The multi-state alarm control method according to claim 8, characterized in that: A hysteresis value is added to the preset intrusion alarm range, the preset anti-dismantling alarm range and the preset fault alarm range. When the value of the output value B exceeds the range and the hysteresis value of the initial state, the state is switched.

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