CN109060005B - Intelligent acquisition system for large building structure safety - Google Patents
Intelligent acquisition system for large building structure safety Download PDFInfo
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Abstract
The invention discloses an intelligent acquisition system for the structural safety of a large building, which comprises a central operation and processing unit, a power management unit, a local storage unit, an acquisition unit, a programmable switch array, a disconnection/short circuit diagnosis unit, an RS485 communication unit and a public network communication module, wherein the local storage unit, the acquisition unit, the programmable switch array, the disconnection/short circuit diagnosis unit, the RS485 communication unit and the public network communication module are respectively connected with the central operation and processing unit; the programmable switch array is connected with the acquisition unit through the open circuit/short circuit diagnosis unit, and is connected with n sensor interfaces, wherein n is more than or equal to 1; the collecting unit comprises a vibrating wire exciting and receiving unit, a resistance collecting unit, a voltage collecting unit and a current collecting unit; the public network communication module is provided with an independent antenna. The invention ensures the originality and authenticity of the data of the acquisition end, and puts calculation and analysis to the cloud server, thereby not only avoiding false uploading of field data, but also being beneficial to big data analysis and being beneficial to safety performance analysis and threshold setting.
Description
Technical Field
The invention relates to the field of large building structure safety monitoring, in particular to an intelligent acquisition system for large building structure safety.
Background
The improvement is opened, the urbanization and the infrastructure development of China can be rapid, and particularly, in recent years, the building speed of large buildings such as high-speed railways, subways, expressways, hydroelectric power station dams, ultra-long span bridges, high-rise buildings and mansions is fast, and the quantity of the large buildings is much worth of the world attention. The structural safety and stability of the buildings are critical, and various collapse events and dangerous buildings sometimes occur, so that the structural health state of the buildings and even the using process of the buildings can be fed back by using various high-precision sensors to measure and monitor the buildings in real time, early warning is provided for abnormal states, and a sensing terminal and a big data analysis basis can be provided for the later construction of smart cities. This requires a terminal acquisition system to acquire, control and manage the sensors in the field.
Through years of technical development, combined efforts in the fields of geotechnical disciplines, electronic disciplines, measurement disciplines and the like, a series of sensing sensors and measurement and detection means are developed successively. Mechanical sensors such as a steel bar meter, an axial force meter and a soil pressure cell are often adopted to monitor the stress condition inside the structure; sensors such as an osmometer, a water level meter and a rain gauge are adopted to monitor the underground water level and the surface rainfall; sensors such as an inclinometer and an inclinometer are adopted to monitor the deep displacement and local inclination; monitoring the cracks and the strain on the surface of the concrete by adopting a crack meter and a stress strain meter; and (3) carrying out surface deformation and displacement monitoring by adopting measurement of a total station, a high-precision GNSS receiver, a displacement meter and the like.
Aiming at the various sensors and measuring equipment, excitation principles or interface technologies are different, and the sensors and the measuring equipment comprise a vibrating string type, an RS485 output type, a resistance output type, an analog voltage output type, a 4-20mA current output type and the like, and in order to acquire sensor data and calculate to acquire monitoring quantity, the sensor acquisition and control equipment is one of the field necessary equipment. The prior art and the equipment are mainly represented by a single type of reading instrument or acquisition module which is developed by each sensor manufacturer for matching with the sensor at home, and the application of the reading instrument or the acquisition module is represented by field manual acquisition or connection with DTU remote measurement remote report.
The sensor acquisition system of the existing manufacturer has the following defects:
1. the universality is not strong enough, and manufacturers mainly use sensors and only aim at home products;
2. the function is single, and only one type of sensor is aimed at;
3. the expandability is not strong, and the number of channels is fixed;
4. cloud computing is avoided, and only remote reporting and query are provided;
5. the intelligent performance is not achieved, and the impedance characteristics of the field sensor and the fault diagnosis and elimination cannot be carried out.
In addition, a sensor collection point (referred to as a monitoring section by a person skilled in the art) in a monitoring field often has a plurality of sensors (several or even dozens) of different types from different manufacturers, and the difficulty of installation, wiring and communication is high. Simultaneously, the scene has a plurality of working faces often, and multiple heavy machinery is worked, and the scene is complicated, and this integument of sensor is damaged in the monitoring process, and the sensor circuit is rolled by the earthmover and is aroused that open circuit short circuit trouble takes place occasionally, not only influences the accuracy of monitoring data like this, also influences the stability and the safety of collection equipment itself simultaneously, and the damage of circuit and sensor very easily arouses collection equipment's damage and leads to whole section to have no data.
Disclosure of Invention
The invention mainly aims to overcome the defects in the prior art, provides an intelligent acquisition system for the structural safety of large buildings, is mainly applied to the field of structural health (safety) monitoring of large buildings such as foundation pits, dams, tunnels, bridges and slopes, and also belongs to the field of construction of smart cities for internet of things perception.
The purpose of the invention is realized by the following technical scheme:
an intelligent acquisition system for the structural safety of a large building comprises a central operation and processing unit, a power management unit, a local storage unit, an acquisition unit, a programmable switch array, a disconnection/short circuit diagnosis unit, an RS485 communication unit and a public network communication module, wherein the local storage unit, the acquisition unit, the programmable switch array, the disconnection/short circuit diagnosis unit, the RS485 communication unit and the public network communication module are respectively connected with the central operation and processing unit; the programmable switch array is connected with the acquisition unit through the open circuit/short circuit diagnosis unit, and is connected with n sensor interfaces, wherein n is more than or equal to 1; the collecting unit comprises a vibrating wire exciting and receiving unit, a resistance collecting unit, a voltage collecting unit and a current collecting unit; the public network communication module is provided with an independent antenna; the power management unit is used for supplying power.
The open circuit/short circuit diagnosis unit captures the impedance characteristics which exceed the set value and appear when the sensor is open circuit/short circuit and submits the impedance characteristics to the central operation and management unit; the central operation and management unit comprises a microcontroller which is responsible for control, interaction, calculation and diagnosis decision of the whole system.
The open circuit/short circuit diagnosis unit comprises a 2-wire sensor, a switching control unit, a resistance network and an analog-to-digital conversion circuit which are sequentially connected, and the switching control unit is also connected with the measurement circuit; the analog-to-digital conversion circuit is connected with the microcontroller.
The voltage V is determined by the configuration of the resistor network in the state of no access to the 2-wire sensor, i.e. the 2-wire sensor is open1、V2、V3、V4And the value of (c) is prestored as a reference value.
When the 2-wire sensor is switched in, the voltage V is measured1、V2、V3、V4The value of (c). For passive sensors such as vibrating wire and resistor, the access resistance value between the wires of the sensor 2 can be calculated through the values, and the short circuit or open circuit condition can be directly diagnosed; for current and voltage sensors, RS485 and other active sensors, on one hand, the output impedance value (namely the access resistance value) of the current and voltage sensors can be obtained, whether the current and voltage sensors are abnormal or not can be preliminarily diagnosed, and then further diagnosis is carried out through the voltage difference between two lines, wherein the voltage difference between the two lines is 0 in a short circuit state; a line open condition may cause one line voltage to clamp at a certain voltage level or indicate a sensor access pair V when both lines are open1、V2、V3、V4Does not have any effect, i.e. its measured value matches a pre-stored value.
The power supply management unit is used for realizing power supply conversion and management of each unit of the intelligent acquisition system; the power management unit supports 9-18V direct current power supply and 220V alternating current power supply, so that alternating current, a storage battery or a solar cell can be selected on site for power supply; the 220V alternating current is converted into 12V and 9-18V direct current through the alternating current adapter, the 12V direct current is input and connected in parallel, then the voltage is stabilized to +12V direct current through a direct current voltage stabilizing circuit with the input of 9-18 VDC and the output of 12VDC, the +5V direct current is converted and output through the direct current voltage stabilizer, the output +5V direct current is converted and output to +3.3V direct current through the direct current voltage stabilizer, and the +12V, +5V, +3.3V output by each voltage stabilizer respectively supplies power to each unit.
The vibrating wire exciting and receiving unit is used for realizing the functions of exciting the vibrating wire sensor and amplifying and filtering return signals and extracting a peripheral mode; the vibrating wire excitation excites the sensor by sending excitation waves with different frequencies in a frequency sweeping mode, resonance is caused when the local oscillation frequency of the sensor is the same as the excitation wave frequency, the same-frequency residual vibration is generated, the duration time reaches a preset time value, and the extraction and conversion are carried out after the filtering and amplification are carried out through a receiving circuit.
The resistance acquisition unit and the current acquisition unit respectively convert the measured resistance and current into voltage, finally the analog quantity is converted into digital quantity through the A/D converter and transmitted to the central operation and processing unit (microcontroller), and the central operation and processing unit (microcontroller) calculates the corresponding resistance value and current value through circuit parameters;
the voltage value measured by the voltage acquisition unit converts the analog quantity into the digital quantity through the A/D converter and transmits the digital quantity to the central operation and processing unit (microcontroller), and the central operation and processing unit (microcontroller) calculates the corresponding voltage value through circuit parameters.
The sensor comprises a precision resistance sensor, wherein the precision resistance sensor is used for measuring the resistance by applying high-precision constant current in a resistance loop and obtaining the linear relation of the voltage at two ends of the resistance along with the change of the resistance by V-I-R; the current measurement is also based on ohm's law, and the current value is obtained through the voltage at the two ends of the precision resistor; therefore, the acquisition and measurement of the resistance, current and voltage type sensors are finally converted into voltage through the conversion circuit, filtered and amplified, and then output to the A/D converter.
The public network communication module realizes interaction by logging in a server platform through the dialing of a telecommunication public network; the local storage unit adopts a mass FLASH memory (FLASH) and is used for storing the identity information, the working mode and the configuration information of the equipment and recently acquired data.
The programmable switch array realizes flexible switching through a programmable device and a high-speed relay, so that each channel type can be configured at will.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. the invention is installed in the monitoring site of large buildings such as high-speed rail tracks, foundation pits, tunnels, side slopes, bridges, dams and the like, has small volume, is convenient to install and place, is connected with various sensors such as a reinforcing bar meter, an axial force meter, an osmometer and the like which are installed on the site, is internally provided with an acquisition module facing different types of sensors, a terminal system is provided with a single or a plurality of interfaces for connecting the sensors, and the site sensors are connected with the terminal system according to the interface definition; the terminal system is internally provided with a network transmission module, surfs the internet by dialing, logs in a cloud server by surfing the internet, and remotely selects the type of the sensor of each channel, the acquisition time and interval of the terminal system, the correction parameter of the sensor, and the working state and the sensor data of the sensor in a timing query mode through the network. As in fig. 1.
2. The invention ensures the originality and authenticity of the data of the acquisition end, and puts calculation and analysis to the cloud server, thereby not only avoiding false uploading of field data, but also being beneficial to big data analysis and being beneficial to safety performance analysis and threshold setting. The intelligent acquisition system disclosed by the invention has strong universality, is convenient to install and connect on site, has the functions of fault diagnosis and obstacle avoidance, and is matched with cloud computing and analysis.
3. The intelligent acquisition system has the following functions:
(1) the network linking function: the terminal system can log in to a server end through dial-up networking to perform identity information registration and data interaction, and has a corresponding interaction protocol and a corresponding safety mechanism; the invention has the networking function, each sensor is a wireless sensing node, and the real-time automatic monitoring is convenient, so that the interference and the influence on the site construction and the maintenance are reduced.
(2) Universality: the invention is based on the type and the working principle of the sensor, does not depend on the product model of the sensor manufacturer, submits the most original data, and puts the operation and the analysis to the server end, so that the universality is very strong, and the invention can be connected with the sensors of different manufacturers and the same type; the invention has the universality of sensor interfaces, and the sensors from different manufacturers are often adopted in the monitoring field, so that special acquisition equipment for the manufacturers is not required, and the quantity and the cost of the equipment are reduced.
(3) Channel type configurability: the invention firstly proposes that the same port is connected with different types of sensors, and after remote configuration, the interior of the system is automatically switched to a matched acquisition circuit; the sensor interface of the invention has configurable types; this is very practical value, and a monitoring point often will connect the sensor of various different interface types at monitoring scene, and the tradition mode adopts different interface module to expand, can cause equipment quantity, volume, cost to increase. For example, 2 axial force meters (vibration wire type) and 2 water level meters (RS485 type) are arranged on the site, an 8-channel vibration wire acquisition module and an 8-channel RS485 acquisition module are required to be configured in the traditional mode, and the invention only needs to provide a multi-channel (4-channel or 8-channel) intelligent acquisition terminal system.
(4) Local memory and storage function: the acquired data is locally backed up, and the system state is subjected to breakpoint memory, so that data loss or abnormal acquisition caused by power failure and network disconnection is prevented; the device provided by the invention has a mass memory and a breakpoint memory function locally, has a backup memory function for data of up to one week, has a breakpoint memory function for network (antenna is shielded or damaged) power failure (wire is broken by pressing and power supply equipment is damaged) which is easy to occur in a construction site, reports the fault type after the normal state is recovered, and continues to complete the unfinished acquisition function.
(5) Intelligent diagnosis function: under normal conditions, the system automatically learns the impedance characteristics of each interface sensor, the invention provides a circuit module for diagnosing the short circuit, the open circuit and the damage of a sensor cable for the first time aiming at the characteristics of the sensor under the condition of fault, and the circuit module actively isolates the sensor after the abnormality of the sensor is diagnosed and confirmed, thereby protecting the main system circuit and not influencing the normal work of other channel sensors. The large building monitoring field generally has the coexistence of a plurality of large building machines and different works, faults and events of crushing a central line and illegally damaging a sensor occur frequently in the process, so that various abnormalities such as short circuit, open circuit and the like of a sensor interface are easily caused, and the damage of a circuit is easily caused by exciting the sensor under the condition to cause the damage and the paralysis of the whole sensor acquisition terminal system, so the function is favorable guarantee for adapting to the harsh conditions of the field.
Drawings
Fig. 1 is a schematic diagram of an application of the intelligent acquisition system for the structural security of a large building according to the invention.
Fig. 2 is a schematic structural diagram of an intelligent acquisition system for structural security of a large building according to the present invention.
Fig. 3 is a schematic structural diagram of the power management unit according to the present invention.
FIG. 4 is a schematic diagram of vibrating wire measurement.
FIG. 5 is a schematic diagram of resistance, current, voltage measurements.
FIG. 6 is a schematic diagram of a programmable switch array according to the present invention.
Fig. 7 is a flowchart of an intelligent acquisition method for structural security of a large building according to the present invention.
Fig. 8 is a schematic structural diagram of the disconnection/short circuit diagnosis unit according to the present invention.
Detailed Description
The present invention will be described in further detail with reference to examples and drawings, but the present invention is not limited thereto.
As shown in fig. 1, 2, 3, 4, 5, 6, 7, and 8, an intelligent acquisition system for structural safety of a large building includes a central operation and processing unit, a power management unit, a local storage unit, an acquisition unit, a programmable switch array, a disconnection/short circuit diagnosis unit, an RS485 communication unit, and a public network communication module, which are respectively connected to the central operation and processing unit; the programmable switch array is connected with the acquisition unit through the open circuit/short circuit diagnosis unit, and is connected with n sensor interfaces, wherein n is more than or equal to 1; the collecting unit comprises a vibrating wire exciting and receiving unit, a resistance collecting unit, a voltage collecting unit and a current collecting unit; the public network communication module is provided with an independent antenna; the power management unit is used for supplying power.
The open circuit/short circuit diagnosis unit captures the impedance characteristics which exceed the set value and appear when the sensor is open circuit/short circuit and submits the impedance characteristics to the central operation and management unit; the central operation and management unit comprises a microcontroller which is responsible for control, interaction, calculation and diagnosis decision of the whole system.
As shown in fig. 8, the open circuit/short circuit diagnosis unit includes a 2-wire sensor, a switching control unit, a resistor network, and an analog-to-digital conversion circuit, which are connected in sequence, and the switching control unit is further connected to the measurement circuit; the analog-to-digital conversion circuit is connected with the microcontroller.
The voltage V is determined by the configuration of the resistor network in the state of no access to the 2-wire sensor, i.e. the 2-wire sensor is open1、V2、V3、V4And the value of (c) is prestored as a reference value.
When the 2-wire sensor is switched in, the voltage V is measured1、V2、V3、V4The value of (c). For passive sensors such as vibrating wire and resistor, the access resistance value between the wires of the sensor 2 can be calculated through the values, and the short circuit or open circuit condition can be directly diagnosed; for current and voltage sensors, RS485 and other active sensors, on one hand, the output impedance value (namely the access resistance value) of the current and voltage sensors can be obtained, whether the current and voltage sensors are abnormal or not can be preliminarily diagnosed, and then further diagnosis is carried out through the voltage difference between two lines, wherein the voltage difference between the two lines is 0 in a short circuit state; a line open condition may cause one line voltage to clamp at a certain voltage level or indicate a sensor access pair V when both lines are open1、V2、V3、V4Does not have any effect, i.e. its measured value matches a pre-stored value.
As shown in fig. 3, the power management unit is configured to implement power conversion and management of each unit of the intelligent acquisition system; the power management unit supports 9-18V direct current power supply and 220V alternating current power supply, so that alternating current, a storage battery or a solar cell can be selected on site for power supply; the 220V alternating current is converted into 12V and 9-18V direct current through the alternating current adapter, the 12V direct current is input and connected in parallel, then the voltage is stabilized to +12V direct current through a direct current voltage stabilizing circuit with the input of 9-18 VDC and the output of 12VDC, the +5V direct current is converted and output through the direct current voltage stabilizer, the output +5V direct current is converted and output to +3.3V direct current through the direct current voltage stabilizer, and the +12V, +5V, +3.3V output by each voltage stabilizer respectively supplies power to each unit.
As shown in fig. 4, the vibrating wire exciting and receiving unit is used for realizing the functions of amplifying, filtering and extracting the excitation and return signals of the vibrating wire sensor; the vibrating wire excitation excites the sensor by sending excitation waves with different frequencies in a frequency sweeping mode, resonance is caused when the local oscillation frequency of the sensor is the same as the excitation wave frequency, the same-frequency residual vibration is generated, the duration time reaches a preset time value, and the extraction and conversion are carried out after the filtering and amplification are carried out through a receiving circuit.
As shown in fig. 5, the resistance acquisition unit and the current acquisition unit respectively convert the measured resistance and current into voltage, and finally convert the analog quantity into digital quantity through the a/D converter and transmit the digital quantity to the central operation and processing unit (microcontroller), and the central operation and processing unit (microcontroller) calculates the corresponding resistance value and current value through the circuit parameters;
the voltage value measured by the voltage acquisition unit converts the analog quantity into the digital quantity through the A/D converter and transmits the digital quantity to the central operation and processing unit (microcontroller), and the central operation and processing unit (microcontroller) calculates the corresponding voltage value through circuit parameters.
The sensor comprises a precision resistance sensor, wherein the precision resistance sensor is used for measuring the resistance by applying high-precision constant current in a resistance loop and obtaining the linear relation of the voltage at two ends of the resistance along with the change of the resistance by V-I-R; the current measurement is also based on ohm's law, and the current value is obtained through the voltage at the two ends of the precision resistor; therefore, the acquisition and measurement of the resistance, current and voltage type sensors are finally converted into voltage through the conversion circuit, filtered and amplified, and then output to the A/D converter.
The public network communication module realizes interaction by logging in a server platform through the dialing of a telecommunication public network; the local storage unit adopts a mass FLASH memory (FLASH) and is used for storing the identity information, the working mode and the configuration information of the equipment and recently acquired data.
As shown in fig. 6, the programmable switch array realizes flexible switching by a programmable device and a high-speed relay, so that each channel type can be configured at will.
The above embodiments are preferred embodiments of the present invention, but the present invention is not limited to the above embodiments, and any other changes, modifications, substitutions, combinations, and simplifications which do not depart from the spirit and principle of the present invention should be construed as equivalents thereof, and all such changes, modifications, substitutions, combinations, and simplifications are intended to be included in the scope of the present invention.
Claims (7)
1. The utility model provides an intelligent acquisition system for large building structure safety which characterized in that: the system comprises a central operation and processing unit, a power management unit, a local storage unit, an acquisition unit, a programmable switch array, a disconnection/short circuit diagnosis unit, an RS485 communication unit and a public network communication module, wherein the local storage unit, the acquisition unit, the programmable switch array, the disconnection/short circuit diagnosis unit, the RS485 communication unit and the public network communication module are respectively connected with the central operation and processing unit; the programmable switch array is connected with the acquisition unit through the open circuit/short circuit diagnosis unit, and is connected with n sensor interfaces, wherein n is more than or equal to 1; the collecting unit comprises a vibrating wire exciting and receiving unit, a resistance collecting unit, a voltage collecting unit and a current collecting unit; the public network communication module is provided with an independent antenna; the power supply management unit is used for supplying power;
the open circuit/short circuit diagnosis unit captures the impedance characteristics which exceed the set value and appear when the sensor is open circuit/short circuit and submits the impedance characteristics to the central operation and management unit; the central operation and management unit comprises a microcontroller and is responsible for control, interaction, calculation and diagnosis decision of the whole system;
the open circuit/short circuit diagnosis unit comprises a 2-wire sensor, a switching control unit, a resistance network and an analog-to-digital conversion circuit which are sequentially connected, and the switching control unit is also connected with the measurement circuit; the analog-to-digital conversion circuit is connected with the microcontroller;
the voltage V is determined by the configuration of the resistor network in the state of no access to the 2-wire sensor, i.e. the 2-wire sensor is open1、V2、V3、V4A value of (a), which is prestored as a reference value;
when the 2-wire sensor is switched in, the voltage V is measured1、V2、V3、V4A value of (d); for the passive sensor, the access resistance value between the sensor 2 lines is calculated through the values, and the short circuit or open circuit condition can be directly diagnosed; for the active sensor, on one hand, the output impedance value, namely the access resistance value of the active sensor is obtained, whether the active sensor is abnormal or not can be preliminarily diagnosed, and then further diagnosis is carried out through the voltage difference between the two lines, wherein the voltage difference between the two lines is 0 in a short-circuit state; a line open condition may cause one line voltage to clamp at a certain voltage level or indicate a sensor access pair V when both lines are open1、V2、V3、V4Does not have any effect, i.e. its measured value matches a pre-stored value.
2. The intelligent acquisition system for large building structural security according to claim 1, wherein: the power supply management unit is used for realizing power supply conversion and management of each unit of the intelligent acquisition system; the power supply management unit supports 9-18V direct current power supply and 220V alternating current power supply; the 220V alternating current is converted into 12V and 9-18V direct current through the alternating current adapter, the 12V direct current is input and connected in parallel, then the voltage is stabilized to +12V direct current through a direct current voltage stabilizing circuit with the input of 9-18 VDC and the output of 12VDC, the +5V direct current is converted and output through the direct current voltage stabilizer, the output +5V direct current is converted and output to +3.3V direct current through the direct current voltage stabilizer, and the +12V, +5V, +3.3V output by each voltage stabilizer respectively supplies power to each unit.
3. The intelligent acquisition system for large building structural security according to claim 1, wherein: the vibrating wire exciting and receiving unit is used for realizing the functions of exciting the vibrating wire sensor and amplifying and filtering return signals and extracting a peripheral mode; the vibrating wire excitation excites the sensor by sending excitation waves with different frequencies in a frequency sweeping mode, resonance is caused when the local oscillation frequency of the sensor is the same as the excitation wave frequency, the same-frequency residual vibration is generated, the duration time reaches a preset time value, and the extraction and conversion are carried out after the filtering and amplification are carried out through a receiving circuit.
4. The intelligent acquisition system for large building structural security according to claim 1, wherein: the resistance acquisition unit and the current acquisition unit respectively convert the measured resistance and current into voltage, finally convert the analog quantity into digital quantity through the A/D converter and transmit the digital quantity to the central operation and processing unit, and the central operation and processing unit calculates the corresponding resistance value and current value through circuit parameters;
the voltage value measured by the voltage acquisition unit converts the analog quantity into the digital quantity through the A/D converter and transmits the digital quantity to the central operation and processing unit, and the central operation and processing unit calculates the corresponding voltage value through circuit parameters.
5. The intelligent acquisition system for large building structural security according to claim 1, wherein: the sensor comprises a precision resistance sensor, wherein the precision resistance sensor is used for measuring the resistance by applying high-precision constant current in a resistance loop and obtaining the linear relation of the voltage at two ends of the resistance along with the change of the resistance by V-I-R; the current measurement is also based on ohm's law, and the current value is obtained through the voltage at the two ends of the precision resistor; therefore, the acquisition and measurement of the resistance, current and voltage type sensors are finally converted into voltage through the conversion circuit, filtered and amplified, and then output to the A/D converter.
6. The intelligent acquisition system for large building structural security according to claim 1, wherein: the public network communication module realizes interaction by logging in a server platform through the dialing of a telecommunication public network; the local storage unit adopts a mass flash memory and is used for storing the identity information, the working mode and the configuration information of the equipment and recently acquired data.
7. The intelligent acquisition system for large building structural security according to claim 1, wherein: the programmable switch array realizes flexible switching through a programmable device and a high-speed relay, so that each channel type can be configured at will.
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