CN111147958A - Wireless synchronous acquisition piling monitoring device and method - Google Patents
Wireless synchronous acquisition piling monitoring device and method Download PDFInfo
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- CN111147958A CN111147958A CN201911420084.3A CN201911420084A CN111147958A CN 111147958 A CN111147958 A CN 111147958A CN 201911420084 A CN201911420084 A CN 201911420084A CN 111147958 A CN111147958 A CN 111147958A
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Abstract
The embodiment of the invention provides a piling monitoring device and method with wireless synchronous acquisition, which can realize nanosecond synchronization among a plurality of wireless acquisition modules, so that the wireless acquisition modules completely meet microsecond data acquisition requirements in piling monitoring, set a trigger threshold according to a host, realize synchronous acquisition and storage of data among two or more (at most, 15) wireless acquisition modules by using synchronous pulses, appoint any channel among the wireless acquisition modules as a trigger channel, trigger any channel, upload the data to the host after triggering, issue the data to the wireless acquisition modules according to trigger addresses by the host, and read and upload the data according to the trigger addresses. Therefore, the synchronous display and analysis of the data of all channels by the host are realized.
Description
Technical Field
The embodiment of the invention relates to the technical field of geotechnical engineering detection and monitoring, in particular to a piling monitoring device and method with wireless synchronous acquisition.
Background
At present, the foundation piles of heavy industrial factory buildings, bridges and high-rise buildings generally adopt concrete precast piles, and are driven in by hammering, so that information such as hammering dynamic stress change, pile body integrity, pile hammer conversion energy, pile bearing capacity and the like can be obtained in the pile driving monitoring process. Because the concrete precast pile and the girder steel stake of major diameter are more and more to and a lot of foundation pile engineering in rivers, lakes and seas, the monitoring demand has not been fine satisfied to the traditional foundation pile monitoring devices who connects acceleration sensor and strain sensor through the cable mode, adopts wireless mode to carry out the collection, the transmission of sensor data, and it is the main mode of current pile monitoring to utilize the host computer to carry out data analysis.
The pile driving monitoring is a method for continuously monitoring the vertical compression resistance, the bearing capacity and the integrity of a pile body of a single foundation pile based on the high strain detection of the foundation pile. In the pile driving monitoring process, two stress sensors and two acceleration sensors are symmetrically fixed near the pile top, along with the continuous hammering pile sinking process, the force F (t) and the change of the product of the speed V (t) and the impedance Z at the detection section M under the action of each hammer are recorded, and by utilizing a fluctuation theory calculation method, important information and analysis results of the foundation pile can be obtained from the analysis (namely, whether the pile driver can effectively drive the pile into the designed depth by the pile body hammering stress monitoring and hammering energy monitoring to judge whether the pile driver can adapt to the site engineering geological conditions to drive the pile into the designed depth), the structural integrity of the pile body, the vertical ultimate bearing capacity of the foundation pile and the like.
Fig. 1 is a schematic diagram of a wireless pile driving monitoring device of the prior art. As shown in fig. 1, the device comprises a sensor connecting cable 0, a pile hammer 3, a cylinder 4 for a precast pile to be driven, and a complete pile driving monitoring device in the prior art comprises a first acceleration sensor 5, a second acceleration sensor 6, a first force sensor 7, a second force sensor 8, a pile driving monitoring host 10, a first wireless acquisition module 1, and a second wireless acquisition module 2 (wherein the first wireless acquisition module 1 and the second wireless acquisition module 2 are two modules with identical functions and circuits); wherein the first acceleration sensor 5 and the first force sensor 7 are connected to 1 and the second acceleration sensor 6 and the second force sensor 8 are connected to 2. And 9 is a fixed point of two wireless acquisition modules. The first acceleration sensor 5, the second acceleration sensor 6, the first force sensor 7 and the second force sensor 8 are arranged on the peripheral surface of the horizontal section of the pile head of the precast pile to be driven, the first acceleration sensor 5 and the second acceleration sensor 6 are symmetrically arranged, and the first force sensor 7 and the second force sensor 8 are symmetrically arranged. Monitoring pile body integrality in the process of driving into the pile, along with the every hammer of driving into of pile hammer 3, the pile of driving into of waiting to monitor produces particle stress and acceleration, first wireless acquisition module 1, second wireless acquisition module 2 sets for respective trigger threshold value respectively, the isoparametric of sampling point number, produce particle stress and acceleration according to the pile of driving into and trigger the data of gathering respectively, and through wireless transmission's mode, upload the data of gathering to host computer 10 and show the save, calculation analysis, accomplish the data monitoring of a hammer this moment, host computer 10 judges the pile body integrality at the in-process of driving into the pile according to this data. The prior art wireless pile driving monitoring device has the following defects: firstly, each wireless module is not controlled synchronously in real time, the modules respectively compare trigger levels and respectively acquire and record data, and the consistency of signal acquisition of each path cannot be ensured. Influence the later data analysis. And secondly, the wireless acquisition module is only responsible for continuously acquiring data and uploading the data to the host. The host computer carries out signal combination, and the host computer easily causes the data combination incorrect when carrying out data combination. Thirdly, when the pile hammer is deflected, the sensor of one wireless module may trigger, and the sensor of the other wireless module triggers slowly or does not trigger, so that data loss is caused, and judgment is affected.
Disclosure of Invention
The embodiment of the invention provides a wireless synchronous acquisition piling monitoring device and method, which are used for solving the problems that in the prior art, when a piling hammer is deflected, a sensor of one wireless module is triggered, and the triggering of a sensor of the other wireless module is slow or not triggered, so that data loss is caused and judgment is influenced.
In a first aspect, an embodiment of the present invention provides a wireless and synchronous acquisition pile driving monitoring apparatus, including a host and a plurality of wireless acquisition modules;
the wireless acquisition module is connected with the host and used for receiving a synchronous acquisition instruction of the host and carrying out synchronous acquisition;
the host is used for connecting and networking the wireless acquisition modules, setting synchronous sampling parameters, presetting one or more wireless acquisition modules as trigger channels, sending synchronous acquisition instructions to the wireless acquisition modules, and reading data based on trigger addresses of the wireless acquisition modules as triggers.
Further, the synchronous sampling parameters include a trigger mode, a sampling length, a sampling interval, and a trigger threshold.
Further, the host comprises a power supply module, a first data storage module, a first FPGA logic control module, a complete machine electric quantity monitoring module, a first low-power-consumption embedded platform, a display driving module, a USB interface, a serial interface, a 2.4G wireless synchronous coordinator module, a first Bluetooth/WIFI wireless transmission module and an antenna;
the power supply module is used for supplying power to the host;
the first data storage module is used for storing the data transmitted by the wireless acquisition module;
the first FPGA logic control module is used for completing FPGA logic control;
the whole machine electric quantity monitoring module is used for monitoring the electric quantity of the host;
the first low-power-consumption embedded platform is used for controlling the transmission of synchronous pulses and the receiving, data analysis and display control of wireless data;
the display driving module is used for driving a display part of the host;
the synchronous coordinator module is connected to the first low-power-consumption embedded platform through a serial port, a synchronous pulse transmitting end of the 2.4G wireless synchronous coordinator module is connected to the first FPGA logic control module, the first low-power-consumption embedded platform transmits a control instruction to the first FPGA logic control module through the GPMC interface module, the first FPGA logic control module analyzes and outputs the synchronous pulse transmitting instruction to the synchronous pulse transmitting end of the 2.4G wireless synchronous coordinator module after receiving the synchronous pulse transmitting instruction, and the 2.4G wireless synchronous coordinator module transmits the synchronous pulse transmitting instruction through an antenna.
Further, the first FPGA logic control module comprises a GPMC interface module, a synchronous pulse module and an electric quantity detection module;
the first FPGA logic control module is in communication connection with the low-power-consumption embedded platform through a GPMC interface module, and I/O pins connected with a hardware circuit are all driven by TTL levels;
the first FPGA logic control module is specifically used for analyzing command signals of the upper computer, converting the command signals and transmitting the converted command signals to the corresponding hardware circuit, and meanwhile transmitting data acquired by the hardware circuit to the upper computer.
Further, the wireless acquisition module comprises a CH1 acceleration signal channel, a CH2 acceleration signal channel, a signal conditioning circuit, a multi-channel analog-to-digital converter (ADC), a second FPGA logic control module, a second data storage module, a 2.4G wireless synchronous node module, a second low-power embedded platform, a second Bluetooth/WIFI wireless transmission module and an antenna;
the multichannel analog-to-digital converter ADC is used for realizing analog-to-digital conversion of the acceleration sensor analog signal and the force sensor analog signal; the second FPGA logic control module controls the multichannel analog-to-digital converter ADC to work according to the received synchronous pulse transmitting instruction transmitted by the host; the second data storage module stores data transmitted by the second Bluetooth/WIFI wireless transmission module; the 2.4G wireless synchronous node module is connected with the second low-power-consumption embedded platform through a serial port for communication, a synchronous pulse output pin of the 2.4G wireless synchronous node module is connected to the second FPGA logic control module, and the second FPGA logic control module starts the multichannel analog-to-digital converter (ADC) according to the synchronous pulse, so that synchronous analog-to-digital conversion of analog signals among the wireless acquisition modules is realized, and synchronous acquisition of data is realized.
Further, the CH1 acceleration signal path includes a first low-pass filter circuit, a first instantaneous floating-point amplifier circuit, and a signal conditioning circuit;
the CH2 acceleration signal channel comprises a dynamic balance adjusting circuit, a second low-pass filter circuit, a second instantaneous floating point amplifying circuit and a signal conditioning circuit.
In a second aspect, an embodiment of the present invention provides a pile driving monitoring method with wireless synchronous acquisition, including:
the method comprises the steps that a host computer sets synchronous sampling parameters, one or more wireless acquisition modules are preset to serve as trigger channels, and synchronous acquisition instructions are sent to the wireless acquisition modules;
the wireless acquisition module acquires a trigger condition based on the synchronous sampling parameter acquisition, enables triggering based on the trigger condition, records a trigger address and stores data;
each wireless acquisition module uploads the trigger address to the host; the host compares the trigger addresses of the wireless acquisition modules; downloading the minimum trigger address to each wireless acquisition module;
the wireless acquisition module reads data according to the trigger address issued by the host and uploads the data to the host.
Further, the wireless acquisition module acquires trigger conditions based on the synchronous sampling parameters, enables triggering based on the trigger conditions, records trigger addresses and stores data, and specifically comprises:
the wireless acquisition module receives a synchronous pulse instruction to work, starts synchronous acquisition and waits for a drop hammer; after the hammer falls, the wireless acquisition module judges whether to trigger according to a trigger threshold; and if the trigger condition is met, acquiring data, recording a trigger address and storing the data.
Further, the synchronous sampling parameters include a trigger mode, a sampling length, a sampling interval, and a trigger threshold.
Further, still include:
the host displays and analyzes the data transmitted from each wireless acquisition module and starts to synchronously acquire the next hammer data.
The embodiment of the invention provides a piling monitoring device and method with wireless synchronous acquisition, which can realize nanosecond synchronization among a plurality of wireless acquisition modules, so that the wireless acquisition modules completely meet microsecond data acquisition requirements in piling monitoring, set a trigger threshold according to a host, realize synchronous acquisition and storage of data among two or more (at most, 15) wireless acquisition modules by using synchronous pulses, appoint any channel among the wireless acquisition modules as a trigger channel, trigger any channel, upload the data to the host after triggering, issue the data to the wireless acquisition modules according to trigger addresses by the host, and read and upload the data according to the trigger addresses. Therefore, the synchronous display and analysis of the data of all channels by the host are realized.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and those skilled in the art can also obtain other drawings according to the drawings without creative efforts.
FIG. 1 is a schematic diagram of a wireless pile driving monitoring device of the prior art;
FIG. 2 is a block diagram of the circuit configuration of the host portion of an embodiment of the present invention;
fig. 3 is a block diagram of a circuit structure of a wireless acquisition module according to an embodiment of the present invention;
fig. 4 is a schematic diagram of wireless synchronous acquisition pile driving monitoring according to an embodiment of the present invention.
Detailed Description
In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are some, but not all, embodiments of the present invention. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase in various places in the specification are not necessarily all referring to the same embodiment, nor are separate or alternative embodiments mutually exclusive of other embodiments. It is explicitly and implicitly understood by one skilled in the art that the embodiments described herein can be combined with other embodiments.
At present, the foundation piles of heavy industrial factory buildings, bridges and high-rise buildings generally adopt concrete precast piles, and are driven in by hammering, so that information such as hammering dynamic stress change, pile body integrity, pile hammer conversion energy, pile bearing capacity and the like can be obtained in the pile driving monitoring process. Because the concrete precast pile and the girder steel pile of major diameter are more and more to and a lot of foundation pile engineering in rivers, lakes and seas, the monitoring demand has not been fine satisfied to the traditional foundation pile monitoring devices who connects acceleration sensor and strain sensor through the cable mode, adopts wireless mode to carry out the collection, the transmission of sensor data, and it is the main mode of current pile monitoring to utilize the host computer to carry out data analysis
The prior art wireless pile driving monitoring device has the following defects: firstly, each wireless module is not controlled synchronously in real time, the modules respectively compare trigger levels and respectively acquire and record data, and the consistency of signal acquisition of each path cannot be ensured. Influence the later data analysis. And secondly, the wireless acquisition module is only responsible for continuously acquiring data and uploading the data to the host. The host computer carries out signal combination, and the host computer easily causes the data combination incorrect when carrying out data combination. Thirdly, when the pile hammer is deflected, the sensor of one wireless module may trigger, and the sensor of the other wireless module triggers slowly or does not trigger, so that data loss is caused, and judgment is affected.
Therefore, the embodiment of the invention provides a pile driving monitoring device and method with wireless synchronous acquisition, which can realize nanosecond synchronization among a plurality of wireless acquisition modules, so that the nanosecond synchronization can completely meet microsecond data acquisition requirements in pile driving monitoring, a trigger threshold value is set according to a host, synchronous acquisition and storage of data among two or more (up to 15) wireless acquisition modules are realized by synchronous pulses, any channel among the wireless acquisition modules can be designated as a trigger channel, and can also be triggered by any channel, the trigger channel is uploaded to the host, the host is issued to the wireless acquisition modules according to trigger addresses, and data is read and uploaded according to the trigger addresses. Therefore, the synchronous display and analysis of the data of all channels by the host are realized. The following description and description will proceed with reference being made to various embodiments.
Fig. 2 to 4 illustrate that the embodiment of the present invention provides a wireless synchronous acquisition pile driving monitoring device, which includes a host 36 and a plurality of wireless acquisition modules;
the wireless acquisition module is connected with the host 36 and is used for receiving a synchronous acquisition instruction of the host 36 and carrying out synchronous acquisition;
the host 36 is configured to connect and network the wireless acquisition modules, set synchronous sampling parameters, preset one or more wireless acquisition modules as trigger channels, send synchronous acquisition instructions to the wireless acquisition modules, and read data based on trigger addresses of the wireless acquisition modules as triggers.
The embodiment of the present invention mainly includes a host 36, a first wireless acquisition module 37, and a second wireless acquisition module 38 (where the first wireless acquisition module 37 and the second wireless acquisition module 38 are two modules with identical functions and circuits) as shown in fig. 4. A first acceleration sensor 5 and a second acceleration sensor 6, a first force sensor 7 and a second force sensor 8.
In this embodiment, as a preferred implementation manner, a local area network is implemented based on a wireless synchronization manner of a local area network, and a local area network is formed by using a 2.4G wireless synchronization coordinator module in a host and a wireless node module in a wireless acquisition module to implement synchronization of data acquisition, pile driving monitoring of wireless synchronization acquisition in the embodiment of the present invention employs a triggering manner based on a heavy hammer impact force, when the wireless acquisition module acquires and uploads data, the host may preset one of the wireless acquisition modules as a triggering channel, or may set any trigger (that is, a plurality of wireless acquisition modules may trigger, and who triggers first takes this trigger as a reference) to automatically trigger and record a trigger address when a trigger threshold set by the host 36 is reached. The data collected by each wireless collection module are strictly synchronized, so that the addresses of data storage are also strictly synchronized, and then the data of other wireless collection modules are read according to the trigger address recorded and the smallest trigger address. Therefore, the accuracy and the synchronism of data of the wireless acquisition modules are ensured.
On the basis of the above embodiment, the synchronous sampling parameters include a trigger mode, a sampling length, a sampling interval, and a trigger threshold.
On the basis of the above embodiments, the host 36 includes a first power supply module 11, a first data storage module 12, a first FPGA logic control module 13, a complete machine electric quantity monitoring module 14, a first low-power-consumption embedded platform 15, a display driving module 16, a first USB interface 17, a first serial port interface 18, a 2.4G wireless synchronization coordinator module 19, a first bluetooth/WIFI wireless transmission module 20, and an antenna;
the first power supply module 11 is used for supplying power to the host 36;
the first data storage module 12 is used for storing data transmitted by the wireless acquisition module;
the first FPGA logic control module 13 is used for completing FPGA logic control;
the whole machine electric quantity monitoring module 14 is used for monitoring the electric quantity of the host 36;
the first low-power-consumption embedded platform 15 is used for controlling the transmission of synchronous pulses and the receiving, data analysis and display control of wireless data;
the display driving module 16 is used for driving the display part of the host 36;
the synchronous coordinator module is connected to the first low-power-consumption embedded platform 15 through a serial port, a synchronous pulse transmitting end of the 2.4G wireless synchronous coordinator module 19 is connected to the first FPGA logic control module 13, the first low-power-consumption embedded platform 15 transmits a control instruction to the first FPGA logic control module 13 through a GPMC interface module, the first FPGA logic control module 13 analyzes and outputs the synchronous pulse transmitting instruction to the synchronous pulse transmitting end of the 2.4G wireless synchronous coordinator module 19 after receiving the synchronous pulse transmitting instruction, and the 2.4G wireless synchronous coordinator module 19 transmits the synchronous pulse transmitting instruction through an antenna.
In this embodiment, as a preferred implementation manner, a first power supply module 11, a first data storage module 12, a first FPGA logic control module 13, a whole power monitoring module 14, a first low-power-consumption embedded platform 15, a display driving module 16, a first USB interface 17, a first serial port interface 18, a 2.4G wireless synchronization coordinator module 19, a first bluetooth/WIFI wireless transmission module 20, a first antenna 100, and a second antenna 200;
specifically, the first power supply module 11 provides various power supply requirements for the whole machine, and the data storage module mainly stores data transmitted by the wireless module; the first FPGA logic control module 13 controls all functional logics of the host 36, and on one hand, it is responsible for analyzing commands of the host computer, and transferring the command signals to the hardware circuit after conversion; on the other hand, data acquired by a bottom layer hardware circuit is transmitted to an upper computer, the first FPGA logic control module 13 is communicated with the first low-power-consumption embedded platform 15 through a GPMC bus, and I/O pins connected with the bottom layer hardware circuit are all driven by TTL levels; the first FPGA logic control module 13 mainly includes a GPMC interface module, a synchronous pulse module, an electric quantity detection module, and the like; the first low-power embedded platform 15 is a core part of the host 36, and controls the operation of the host 36, the transmission of synchronization pulses, the reception of wireless data, data analysis, display control, data analysis, wireless transmission, and the like; the display driving module 16 displays the received data of each channel; the 2.4G wireless synchronization coordinator module 19 is a key part in the embodiment of the present invention, and is connected to the first low-power embedded platform 15 through a serial port, and can perform communication, and the transmission control pin of the synchronization pulse is connected to the first FPGA logic control module 13, and the first low-power embedded platform 15 controls the first FPGA logic control module 13 to output a synchronization pulse transmission instruction, and perform transmission through the module, and the synchronization pulse transmission process is as follows: the first low-power-consumption embedded platform 15 is connected with and transmits a synchronization instruction to the first FPGA logic control module 13, the first FPGA logic control module 13 performs level conversion on the synchronization instruction and outputs the synchronization instruction to the 2.4G wireless synchronization coordinator module 19, and the 2.4G wireless synchronization coordinator module 19 outputs a synchronization pulse after receiving the instruction; the first bluetooth/WIFI wireless transmission module 20 realizes data transmission with the wireless acquisition module, issues corresponding parameters and control instructions to the wireless acquisition module, and is connected with the first low-power-consumption embedded platform 15 through the first USB interface 17 for realizing high-rate data transceiving, which may be bluetooth or WIFI.
The first USB interface 17 and the first serial interface 18 are external interfaces of the host 36, the 2.4G wireless synchronization coordinator module 19 is a synchronization coordinator module and is connected to the first low-power embedded platform 15 through serial ports, a synchronization pulse transmitting terminal of the 2.4G wireless synchronization coordinator module 19 is connected to the first FPGA logic control module 13, the first low-power embedded platform 15 transmits a control command to the first FPGA logic control module 13 through the GPMC interface module, the first FPGA logic control module 13 parses and outputs the command to the synchronization pulse transmitting terminal of the 2.4G wireless synchronization coordinator module 19 after receiving the synchronization pulse transmitting command from the first low-power embedded platform 15, the 2.4G wireless synchronization coordinator module 19 transmits a synchronization pulse through the first antenna 100, the first Bluetooth/WIFI wireless transmission module 20 is a transceiving module between the host 36 and the wireless module, which transmits and receives data through the second antenna 200.
On the basis of the above embodiments, the first FPGA logic control module 13 includes a GPMC interface module, a synchronization pulse module, and an electric quantity detection module;
the first FPGA logic control module 13 is in communication connection with the low-power-consumption embedded platform through a GPMC interface module, and I/O pins connected with a hardware circuit are all driven by TTL levels;
the first FPGA logic control module 13 is specifically configured to parse an upper computer command signal, convert the command signal, and transmit the converted command signal to a corresponding hardware circuit, and transmit data acquired by the hardware circuit to the upper computer.
On the basis of the above embodiments, the wireless acquisition module includes a CH1 acceleration signal channel, a CH2 acceleration signal channel, a signal conditioning circuit, a multi-channel analog-to-digital converter ADC27, a second FPGA logic control module 28, a second data storage module 29, a 2.4G wireless synchronization node module 33, a second low-power embedded platform 35, a second bluetooth/WIFI wireless transmission module 34, and an antenna;
the multichannel analog-to-digital converter ADC27 is used for realizing analog-to-digital conversion of the acceleration sensor analog signal and the force sensor analog signal; the second FPGA logic control module 28 controls the multi-channel analog-to-digital converter ADC27 to operate according to the received synchronous pulse transmission instruction transmitted by the host 36; the second data storage module 29 stores the data transmitted by the second bluetooth/WIFI wireless transmission module 34; the 2.4G wireless synchronization node module 33 is connected with the second low-power-consumption embedded platform 35 through a serial port for communication, a synchronization pulse output pin of the 2.4G wireless synchronization node module 33 is connected to the second FPGA logic control module 28, the second FPGA logic control module 28 starts the multichannel analog-to-digital converter ADC27 according to the synchronization pulse, synchronous analog-to-digital conversion of analog signals among the wireless acquisition modules is realized, and synchronous acquisition of data is realized.
In this embodiment, as a preferred implementation manner, a functional block diagram of a circuit of the first wireless acquisition module 37 and the second wireless acquisition module 38 (a module in which two functions and circuits of the first wireless acquisition module 37 and the second wireless acquisition module 38 are completely the same) shown in fig. 4 is shown in fig. 3, where the circuit of the wireless acquisition module mainly includes the second power supply module 21, a CH1 acceleration signal channel, and a CH2 strain signal channel; multichannel ADC27, second FPGA logic control module 28, second data storage module 29, electric quantity monitoring module 30, second USB interface 31, second serial port interface 32, wireless synchronization node module 33, second bluetooth/WIFI wireless transmission module 34, second low-power embedded platform 35, third antenna 300. The second power supply module 21 provides various power supply requirements for the whole wireless acquisition module, the second FPGA logic control module 28 mainly has the function of FPGA logic control, and the second FPGA logic control module 28 is an interaction junction of upper computer software and bottom hardware, and is in charge of analyzing an upper computer command on one hand, converting a command signal and transmitting the command signal to a hardware circuit; and on the other hand, the data acquired by the bottom hardware circuit is transmitted to the upper computer. The second FPGA logic control module 28 communicates with the second low-power-consumption embedded platform 35 through a GPMC bus, and I/O pins connected to the bottom hardware circuit are all driven by TTL levels; the second FPGA logic control module 28 includes a GPMC interface module, an instantaneous floating point amplification control module, a trigger control module, a sampling control module, an SRAM read-write control module, a clock bus module, an electric quantity detection module, an instantaneous floating point control module, a synchronous pulse detection module, a code comparison generation module, and the like; the GPMC interface module is an end point and a starting point of data reading operation and writing operation of each module, all commands sent from the upper computer are analyzed and transferred through the GPMC interface module and are transmitted to the corresponding functional modules, and data sent to the upper computer by all the functional modules are gathered to the GPMC interface module and are converted into a format specified by the GPMC to be sent to the upper computer. The second data storage module 29 is a data storage part, and stores data converted by the multi-channel analog-to-digital converter ADC27 according to the SRAM read-write control module of the second FPGA logic control module 28, the power monitoring module mainly functions to monitor the power of the wireless transmission module, read data and control the display of the power indicator lamp through the second FPGA logic control module 28, and upload the data to the host 36, the second serial port interface 32 and the second USB interface 31 are external interfaces, the wireless synchronization node module is a synchronization coordinator module, the output end of the synchronization pulse is connected to the second FPGA logic control module 28, the serial port thereof is connected to the second low-power embedded platform 35, the wireless module receives the synchronization pulse through the third antenna 300, and outputs the synchronization pulse to the second FPGA logic control module 28, the second FPGA logic control module 28 performs synchronous acquisition of data according to the synchronization pulse, the second bluetooth/WIFI wireless transmission module 34 is a WIFI transceiving module between the wireless module and the host 36, and transmits and receives data through the fourth antenna 400.
On the basis of the above embodiments, the CH1 acceleration signal path includes the first low-pass filter circuit 22, the first instantaneous floating-point amplifier circuit 23, and the signal conditioning circuit;
the CH2 acceleration signal path includes a dynamic balancing circuit 24, a second low pass filter circuit 25, a second transient floating point amplifier circuit 26, and a signal conditioning circuit.
The wireless synchronous acquisition piling monitoring device provided by the embodiment of the invention is a wireless synchronous mode based on a local area network, and the local area network can automatically form a network and comprises a wireless synchronous coordinator module (transmitting synchronous pulses) and a plurality of wireless node modules (receiving synchronous pulses). Synchronization of up to 15 wireless node modules can be achieved within a range of 150 meters. In the schematic diagram of fig. 4, the wireless synchronous acquisition pile driving monitoring is controlled to realize synchronous acquisition of data by using a local area network formed by the wireless synchronous coordinator module 2.4G in the host 36, the wireless synchronous node modules in the first wireless acquisition module 37 and the second wireless acquisition module 38. A first low-power-consumption embedded platform 15 of a host machine in the local area network controls a 2.4G wireless synchronization coordinator module 19 to transmit synchronization pulses through a first FPGA logic control module 13 and transmits the synchronization pulses through a first antenna 100; after receiving the synchronization pulse through the third antenna 300, the wireless synchronization node modules in the first wireless acquisition module 37 and the second wireless acquisition module 38 output the synchronization pulse to the second FPGA logic control module 28, and the second FPGA logic control module 28 performs synchronous acquisition of data according to the synchronization pulse, thereby implementing the synchronous acquisition function of the first wireless acquisition module 37 and the second wireless acquisition module 38.
The wireless synchronous acquisition pile driving monitoring method adopts a triggering mode based on the impact force of a heavy hammer, 37 and 38 wireless acquisition modules can be used for synchronous acquisition, one module can be preset as a triggering channel, and any trigger (namely, two modules can be triggered, and the trigger is used as a reference for triggering first) can be set, and when the triggering threshold reaches a set trigger threshold, the triggering is automatically triggered to record a trigger address. Since the data collected by the 37, 38 wireless collection modules are strictly synchronous, the addresses of the data storage are also strictly synchronous, and then the data of another wireless collection module is read according to the recorded trigger address. Therefore, the accuracy and the synchronism of the data of the two wireless acquisition modules are ensured. The specific working flow of the wireless synchronous acquisition of the piling monitoring is as follows:
step (1), installing a sensor to start a wireless acquisition module, and starting a host;
the first and second acceleration sensors 5, 6, the first and second force sensors 7, 8 in fig. 4; the four sensors are respectively arranged on the surface of the side of the pile, which is not less than 2 times of the diameter of the pile to be measured or the widening distance from the pile top, the first acceleration sensor 5 and the second acceleration sensor 6 are symmetrically arranged on the same horizontal plane, and the first force sensor 7 and the second force sensor 8 are symmetrically arranged on the same horizontal plane. All the sensors after being installed are tightly attached to the surface of the pile body to be monitored, and the pile body cannot be loosened during hammering.
Step (2), the first wireless acquisition module 37 and the second wireless acquisition module 38 are connected with the host 36, and the instruction and data transmission between the first wireless acquisition module 37 and the host 36 and between the second wireless acquisition module 38 and the host 36 are realized through the second bluetooth/WIFI wireless transmission module 34 and the fourth antenna 400; starting initialization parameters; at this time, the host 36 receives that the initial states of the first wireless acquisition module 37 and the second wireless acquisition module 38 are 0, which indicates that the host 36 has established connection with the first wireless acquisition module 37 and the second wireless acquisition module 38, so that the connection indication and the like are green; the host computer 36 issues a monitoring command to balance the initial strain values of the first force sensor 7 and the second force sensor 8 of the first wireless collection module 37 and the second wireless collection module 38.
Step (3), the host 36 issues an acquisition starting instruction, and issues parameters such as a trigger mode, a sampling length, a sampling interval, a trigger threshold value and the like to the wireless acquisition modules, namely, the first wireless acquisition module 37 and the second wireless acquisition module 38 receive the acquisition starting instruction, start to set the parameters issued by the host 36, and wait for receiving a synchronization signal, and the first wireless acquisition module 37 and the second wireless acquisition module 38 report a state of 1 to the host 36, which indicates that synchronization is to be waited; after receiving the state 1, the host 36 controls the 2.4G wireless synchronization coordinator module 19 to transmit a synchronization pulse;
step (4), the first wireless acquisition module 37 and the second wireless acquisition module 38 receive the synchronization pulse through the 2.4G wireless synchronization node module 33, switch the state to 1 and report the state to the host 36, which indicates that the synchronization signal has been received, if the first wireless acquisition module 37 and/or the second wireless acquisition module 38 do not receive the synchronization signal, the host 36 retransmits the synchronization signal every 200ms, the first wireless acquisition module 37 and the second wireless acquisition module 38 start the ADC to work according to the synchronization pulse signal, start the synchronous acquisition and switch the state to 2, which indicates waiting for triggering, i.e., waiting for drop hammer;
step (5), the drop hammer, the first wireless acquisition module 37 and the second wireless acquisition module 38 judge triggering according to a preset triggering threshold; enabling triggering when the triggering condition is met, recording a triggering address and storing data;
step (6), each wireless acquisition module uploads a trigger address to a host; the host compares the trigger addresses of the modules; downloading the minimum trigger address to each wireless acquisition module; and if one module is not triggered, reading data directly according to the trigger address of the triggered module. The maximum time for waiting for the trigger address of another module is 2 s; if overtime, entering the next step;
step (7), the wireless acquisition module reads data according to the trigger address sent by the host, the sampled length and other parameters and uploads the data to the host through the second Bluetooth/WIFI wireless transmission module 34 and the fourth antenna 400;
and (8) the host displays, analyzes and stores the data transmitted from each wireless acquisition module, and automatically enters the step (1) to enter the synchronous acquisition of the next hammer.
The embodiment of the invention also provides a wireless synchronous acquisition piling monitoring method, and the wireless synchronous acquisition piling detection device based on the embodiments comprises the following steps:
the method comprises the steps that a host computer sets synchronous sampling parameters, one or more wireless acquisition modules are preset to serve as trigger channels, and synchronous acquisition instructions are sent to the wireless acquisition modules;
the wireless acquisition module acquires a trigger condition based on the synchronous sampling parameter acquisition, enables triggering based on the trigger condition, records a trigger address and stores data;
each wireless acquisition module uploads the trigger address to the host; the host compares the trigger addresses of the wireless acquisition modules; downloading the minimum trigger address to each wireless acquisition module;
the wireless acquisition module reads data according to the trigger address issued by the host and uploads the data to the host.
Further, the wireless acquisition module acquires trigger conditions based on the synchronous sampling parameters, enables triggering based on the trigger conditions, records trigger addresses and stores data, and specifically comprises:
the wireless synchronous acquisition module receives a synchronous pulse instruction to work, starts synchronous acquisition and waits for a drop hammer; after the hammer falls, the wireless acquisition module judges whether to trigger according to a trigger threshold; and if the trigger condition is met, acquiring data, recording a trigger address and storing the data.
On the basis of the above embodiments, the synchronous sampling parameters include a trigger mode, a sampling length, a sampling interval, and a trigger threshold.
On the basis of the above embodiments, the method further includes:
the host displays and analyzes the data transmitted from each wireless acquisition module and starts to synchronously acquire the next hammer data.
On the basis of the above embodiments, the wireless acquisition module includes a CH1 acceleration signal channel, a CH2 acceleration signal channel, a signal conditioning circuit, a multi-channel analog-to-digital converter ADC27, a second FPGA logic control module 28, a second data storage module 29, a 2.4G wireless synchronization node module 33, a second low-power embedded platform 35, a second bluetooth/WIFI wireless transmission module 34, and an antenna;
the multichannel analog-to-digital converter ADC27 is used for realizing analog-to-digital conversion of the acceleration sensor analog signal and the force sensor analog signal; the second FPGA logic control module 28 controls the multi-channel analog-to-digital converter ADC27 to operate according to the received synchronous pulse transmission instruction transmitted by the host 36; the second data storage module 29 stores the data transmitted by the second bluetooth/WIFI wireless transmission module 34; the 2.4G wireless synchronization node module 33 is connected with the second low-power-consumption embedded platform 35 through a serial port for communication, a synchronization pulse output pin of the 2.4G wireless synchronization node module 33 is connected to the second FPGA logic control module 28, the second FPGA logic control module 28 starts the multichannel analog-to-digital converter ADC27 according to the synchronization pulse, synchronous analog-to-digital conversion of analog signals among the wireless acquisition modules is realized, and synchronous acquisition of data is realized.
In this embodiment, as a preferred implementation manner, a functional block diagram of a circuit of the first wireless acquisition module 37 and the second wireless acquisition module 38 (a module in which two functions and circuits of the first wireless acquisition module 37 and the second wireless acquisition module 38 are completely the same) shown in fig. 4 is shown in fig. 3, where the circuit of the wireless acquisition module mainly includes the second power supply module 21, a CH1 acceleration signal channel, and a CH2 strain signal channel; multichannel ADC27, second FPGA logic control module 28, second data storage module 29, electric quantity monitoring module 30, second USB interface 31, second serial port interface 32, wireless synchronization node module, second bluetooth/WIFI wireless transmission module 34, second low-power consumption embedded platform 35, third antenna 300. The second power supply module 21 provides various power supply requirements for the whole wireless acquisition module, the second FPGA logic control module 28 mainly has the function of FPGA logic control, and the second FPGA logic control module 28 is an interaction junction of upper computer software and bottom hardware, and is in charge of analyzing an upper computer command on one hand, converting a command signal and transmitting the command signal to a hardware circuit; and on the other hand, the data acquired by the bottom hardware circuit is transmitted to the upper computer. The second FPGA logic control module 28 communicates with the second low-power-consumption embedded platform 35 through a GPMC bus, and I/O pins connected to the bottom hardware circuit are all driven by TTL levels; the second FPGA logic control module 28 includes a GPMC interface module, an instantaneous floating point amplification control module, a trigger control module, a sampling control module, an SRAM read-write control module, a clock bus module, an electric quantity detection module, an instantaneous floating point control module, a synchronous pulse detection module, a code comparison generation module, and the like; the GPMC interface module is an end point and a starting point of data reading operation and writing operation of each module, all commands sent from the upper computer are analyzed and transferred through the GPMC interface module and are transmitted to the corresponding functional modules, and data sent to the upper computer by all the functional modules are gathered to the GPMC interface module and are converted into a format specified by the GPMC to be sent to the upper computer. The second data storage module 29 is a data storage part, and stores data converted by the multi-channel analog-to-digital converter ADC27 according to the SRAM read-write control module of the second FPGA logic control module 28, the power monitoring module mainly functions to monitor the power of the wireless transmission module, read data and control the display of the power indicator lamp through the second FPGA logic control module 28, and upload the data to the host 36, the second serial port interface 32 and the second USB interface 31 are external interfaces, the wireless synchronization node module is a synchronization coordinator module, the output end of the synchronization pulse is connected to the second FPGA logic control module 28, the serial port thereof is connected to the second low-power embedded platform 35, the wireless module receives the synchronization pulse through the third antenna 300, and outputs the synchronization pulse to the second FPGA logic control module 28, the second FPGA logic control module 28 performs synchronous acquisition of data according to the synchronization pulse, the second bluetooth/WIFI wireless transmission module 34 is a WIFI transceiving module between the wireless module and the host 36, and transmits and receives data through the fourth antenna 400.
On the basis of the above embodiments, the CH1 acceleration signal path includes the first low-pass filter circuit 22, the first instantaneous floating-point amplifier circuit 23, and the signal conditioning circuit;
the CH2 acceleration signal path includes a dynamic balancing circuit 24, a second low pass filter circuit 25, a second transient floating point amplifier circuit 26, and a signal conditioning circuit.
The wireless synchronous acquisition piling monitoring device provided by the embodiment of the invention is a wireless synchronous mode based on a local area network, and the local area network can automatically form a network and comprises a wireless synchronous coordinator module (transmitting synchronous pulses) and a plurality of wireless node modules (receiving synchronous pulses). Synchronization of up to 15 wireless node modules can be achieved within a range of 150 meters. In the schematic diagram of fig. 4, the wireless synchronous acquisition pile driving monitoring is controlled to realize synchronous acquisition of data by using a local area network formed by the wireless synchronous coordinator module 2.4G in the host 36, the wireless synchronous node modules in the first wireless acquisition module 37 and the second wireless acquisition module 38. A first low-power-consumption embedded platform 15 of a host machine in the local area network controls a 2.4G wireless synchronization coordinator module 19 to transmit synchronization pulses through a first FPGA logic control module 13 and transmits the synchronization pulses through a first antenna 100; after receiving the synchronization pulse through the third antenna 300, the wireless synchronization node modules in the first wireless acquisition module 37 and the second wireless acquisition module 38 output the synchronization pulse to the second FPGA logic control module 28, and the second FPGA logic control module 28 performs synchronous acquisition of data according to the synchronization pulse, thereby implementing the synchronous acquisition function of the first wireless acquisition module 37 and the second wireless acquisition module 38.
The wireless synchronous acquisition pile driving monitoring method adopts a triggering mode based on the impact force of a heavy hammer, 37 and 38 wireless acquisition modules can be used for synchronous acquisition, one module can be preset as a triggering channel, and any trigger (namely, two modules can be triggered, and the trigger is used as a reference for triggering first) can be set, and when the triggering threshold reaches a set trigger threshold, the triggering is automatically triggered to record a trigger address. Since the data collected by the 37, 38 wireless collection modules are strictly synchronous, the addresses of the data storage are also strictly synchronous, and then the data of another wireless collection module is read according to the recorded trigger address. Therefore, the accuracy and the synchronism of the data of the two wireless acquisition modules are ensured. The specific working flow of the wireless synchronous acquisition of the piling monitoring is as follows:
step (1), installing a sensor to start a wireless acquisition module, and starting a host;
the first and second acceleration sensors 5, 6, the first and second force sensors 7, 8 in fig. 4; the four sensors are respectively arranged on the surface of the side of the pile, which is not less than 2 times of the diameter of the pile to be measured or the widening distance from the pile top, the first acceleration sensor 5 and the second acceleration sensor 6 are symmetrically arranged on the same horizontal plane, and the first force sensor 7 and the second force sensor 8 are symmetrically arranged on the same horizontal plane. All the sensors after being installed are tightly attached to the surface of the pile body to be monitored, and the pile body cannot be loosened during hammering.
Step (2), the first wireless acquisition module 37 and the second wireless acquisition module 38 are connected with the host 36, and the instruction and data transmission between the first wireless acquisition module 37 and the host 36 and between the second wireless acquisition module 38 and the host 36 are realized through the second bluetooth/WIFI wireless transmission module 34 and the fourth antenna 400; starting initialization parameters; at this time, the host 36 receives that the initial states of the first wireless acquisition module 37 and the second wireless acquisition module 38 are 0, which indicates that the host 36 has established connection with the first wireless acquisition module 37 and the second wireless acquisition module 38, so that the connection indication and the like are green; the host computer 36 issues a monitoring command to balance the initial strain values of the first force sensor 7 and the second force sensor 8 of the first wireless collection module 37 and the second wireless collection module 38.
Step (3), the host 36 issues an acquisition starting instruction, and issues parameters such as a trigger mode, a sampling length, a sampling interval, a trigger threshold value and the like to the wireless acquisition modules, namely, the first wireless acquisition module 37 and the second wireless acquisition module 38 receive the acquisition starting instruction, start to set the parameters issued by the host 36, and wait for receiving a synchronization signal, and the first wireless acquisition module 37 and the second wireless acquisition module 38 report a state of 1 to the host 36, which indicates that synchronization is to be waited; after receiving the state 1, the host 36 controls the 2.4G wireless synchronization coordinator module 19 to transmit a synchronization pulse;
step (4), the first wireless acquisition module 37 and the second wireless acquisition module 38 receive the synchronization pulse through the 2.4G wireless synchronization node module 33, switch the state to 1 and report the state to the host 36, which indicates that the synchronization signal has been received, if the first wireless acquisition module 37 and/or the second wireless acquisition module 38 do not receive the synchronization signal, the host 36 retransmits the synchronization signal every 200ms, the first wireless acquisition module 37 and the second wireless acquisition module 38 start the ADC to work according to the synchronization pulse signal, start the synchronous acquisition and switch the state to 2, which indicates waiting for triggering, i.e., waiting for drop hammer;
step (5), the drop hammer, the first wireless acquisition module 37 and the second wireless acquisition module 38 judge triggering according to a preset triggering threshold; enabling triggering when the triggering condition is met, recording a triggering address and storing data;
step (6), each wireless acquisition module uploads a trigger address to a host; the host compares the trigger addresses of the modules; downloading the minimum trigger address to each wireless acquisition module; and if one module is not triggered, reading data directly according to the trigger address of the triggered module. The maximum time for waiting for the trigger address of another module is 2 s; if overtime, entering the next step;
step (7), the wireless acquisition module reads data according to the trigger address sent by the host, the sampled length and other parameters and uploads the data to the host through the second Bluetooth/WIFI wireless transmission module 34 and the fourth antenna 400;
and (8) the host displays, analyzes and stores the data transmitted from each wireless acquisition module, and automatically enters the step (1) to enter the synchronous acquisition of the next hammer.
In summary, the embodiments of the present invention provide a pile driving monitoring apparatus and method for wireless synchronous acquisition, which can implement nanosecond synchronization between multiple wireless acquisition modules, so that the nanosecond synchronization completely meets microsecond data acquisition requirements in pile driving monitoring, set a trigger threshold according to a host, implement synchronous acquisition and storage of data between two or more (up to 15) wireless acquisition modules by using a synchronization pulse, where any channel between the wireless acquisition modules can be designated as a trigger channel, or can be triggered by any channel, and upload the data to the host after triggering, and the host issues the data to the wireless acquisition modules according to a trigger address, and reads and uploads the data according to the trigger address. Therefore, the synchronous display and analysis of the data of all channels by the host are realized.
The terms "first" and "second" in the embodiments of the present application are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present application, the terms "comprise" and "have", as well as any variations thereof, are intended to cover a non-exclusive inclusion. For example, a system, product or apparatus that comprises a list of elements or components is not limited to only those elements or components but may alternatively include other elements or components not expressly listed or inherent to such product or apparatus. In the description of the present application, "plurality" means at least two, e.g., two, three, etc., unless explicitly specifically limited otherwise.
The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; it will be appreciated by those skilled in the art that the present invention may be varied in form, structure, arrangement, proportions, materials, elements, components and otherwise, used in the practice of the invention, depending upon specific environments and operating requirements, without departing from the principles of the present invention. The scope of the invention is therefore defined by the claims and their legal equivalents, and not by the limitations set forth in the foregoing description.
The above-described embodiments of the apparatus are merely illustrative, and the units described as separate parts may or may not be physically separate, and parts displayed as units may or may not be physical units, may be located in one place, or may be distributed on a plurality of network units. Some or all of the modules may be selected according to actual needs to achieve the purpose of the solution of the present embodiment. One of ordinary skill in the art can understand and implement it without inventive effort.
Through the above description of the embodiments, those skilled in the art will clearly understand that each embodiment can be implemented by software plus a necessary general hardware platform, and certainly can also be implemented by hardware. With this understanding in mind, the above-described technical solutions may be embodied in the form of a software product, which can be stored in a computer-readable storage medium such as ROM/RAM, magnetic disk, optical disk, etc., and includes instructions for causing a computer device (which may be a personal computer, a server, or a network device, etc.) to execute the methods described in the embodiments or some parts of the embodiments.
Finally, it should be noted that: the above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions of the embodiments of the present invention.
Claims (10)
1. A wireless synchronous acquisition piling monitoring device is characterized by comprising a host and a plurality of wireless acquisition modules;
the wireless acquisition module is connected with the host and used for receiving a synchronous acquisition instruction of the host and carrying out synchronous acquisition;
the host is used for connecting and networking the wireless acquisition modules, setting synchronous sampling parameters, presetting one or more wireless acquisition modules as trigger channels, sending synchronous acquisition instructions to the wireless acquisition modules, and reading data based on trigger addresses of the wireless acquisition modules as triggers.
2. The wireless synchronous acquisition pile driving monitoring device of claim 1, wherein the synchronous sampling parameters include trigger mode, sampling length, sampling interval, and trigger threshold.
3. The wireless synchronous acquisition piling monitoring device according to claim 1, wherein the host comprises a power supply module, a first data storage module, a first FPGA logic control module, a whole electric quantity monitoring module, a first low-power embedded platform, a display driving module, a USB interface, a serial interface, a 2.4G wireless synchronous coordinator module, a first Bluetooth/WIFI wireless transmission module and an antenna;
the power supply module is used for supplying power to the host;
the first data storage module is used for storing the data transmitted by the wireless acquisition module;
the first FPGA logic control module is used for completing FPGA logic control;
the whole machine electric quantity monitoring module is used for monitoring the electric quantity of the host;
the first low-power-consumption embedded platform is used for controlling the transmission of synchronous pulses and the receiving, data analysis and display control of wireless data;
the display driving module is used for driving a display part of the host;
the synchronous coordinator module is connected to the first low-power-consumption embedded platform through a serial port, a synchronous pulse transmitting end of the 2.4G wireless synchronous coordinator module is connected to the first FPGA logic control module, the first low-power-consumption embedded platform transmits a control instruction to the first FPGA logic control module through the GPMC interface module, the first FPGA logic control module analyzes and outputs the synchronous pulse transmitting instruction to the synchronous pulse transmitting end of the 2.4G wireless synchronous coordinator module after receiving the synchronous pulse transmitting instruction, and the 2.4G wireless synchronous coordinator module transmits the synchronous pulse transmitting instruction through an antenna.
4. The wireless synchronous acquisition piling monitoring device according to claim 3, wherein the first FPGA logic control module comprises a GPMC interface module, a synchronous pulse module and an electric quantity detection module;
the first FPGA logic control module is in communication connection with the low-power-consumption embedded platform through a GPMC interface module, and I/O pins connected with a hardware circuit are all driven by TTL levels;
the first FPGA logic control module is specifically used for analyzing command signals of the upper computer, converting the command signals and transmitting the converted command signals to the corresponding hardware circuit, and meanwhile transmitting data acquired by the hardware circuit to the upper computer.
5. The wireless synchronous acquisition piling monitoring device according to claim 3, wherein the wireless acquisition module comprises a CH1 acceleration signal channel, a CH2 acceleration signal channel, a signal conditioning circuit, a multi-channel analog-to-digital converter (ADC), a second FPGA logic control module, a second data storage module, a 2.4G wireless synchronous node module, a second low-power embedded platform, a second Bluetooth/WIFI wireless transmission module and an antenna;
the multichannel analog-to-digital converter ADC is used for realizing analog-to-digital conversion of the acceleration sensor analog signal and the force sensor analog signal; the second FPGA logic control module controls the multichannel analog-to-digital converter ADC to work according to the received synchronous pulse transmitting instruction transmitted by the host; the second data storage module stores data transmitted by the second Bluetooth/WIFI wireless transmission module; the 2.4G wireless synchronous node module is connected with the second low-power-consumption embedded platform through a serial port for communication, a synchronous pulse output pin of the 2.4G wireless synchronous node module is connected to the second FPGA logic control module, and the second FPGA logic control module starts the multichannel analog-to-digital converter (ADC) according to the synchronous pulse, so that synchronous analog-to-digital conversion of analog signals among the wireless acquisition modules is realized, and synchronous acquisition of data is realized.
6. The wireless synchronous acquisition pile driving monitoring device of claim 5, wherein the CH1 acceleration signal path includes a first low pass filter circuit 22, a first transient floating point amplification circuit, and a signal conditioning circuit;
the CH2 acceleration signal channel comprises a dynamic balance adjusting circuit, a second low-pass filter circuit, a second instantaneous floating point amplifying circuit and a signal conditioning circuit.
7. A wireless synchronous acquisition piling monitoring method is characterized by comprising the following steps:
the method comprises the steps that a host computer sets synchronous sampling parameters, one or more wireless acquisition modules are preset to serve as trigger channels, and synchronous acquisition instructions are sent to the wireless acquisition modules;
the wireless acquisition module acquires a trigger condition based on the synchronous sampling parameter acquisition, enables triggering based on the trigger condition, records a trigger address and stores data;
each wireless acquisition module uploads the trigger address to the host; the host compares the trigger addresses of the wireless acquisition modules; downloading the minimum trigger address to each wireless acquisition module;
the wireless acquisition module reads data according to the trigger address issued by the host and uploads the data to the host.
8. The wireless synchronous acquisition piling monitoring method according to claim 7, wherein the wireless acquisition module acquires a trigger condition based on the synchronous sampling parameter acquisition, enables triggering based on the trigger condition, records a trigger address and stores data, and specifically comprises:
the wireless acquisition module receives a synchronous pulse instruction to work, starts synchronous acquisition and waits for a drop hammer; after the hammer falls, the wireless acquisition module judges whether to trigger according to a trigger threshold; and if the trigger condition is met, acquiring data, recording a trigger address and storing the data.
9. The wireless synchronous acquisition pile driving monitoring method of claim 7, wherein the synchronous sampling parameters include trigger mode, sampling length, sampling interval, and trigger threshold.
10. The method of claim 7, further comprising:
the host displays and analyzes the data transmitted from each wireless acquisition module and starts to synchronously acquire the next hammer data.
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Application publication date: 20200512 |