CN209946681U - Engineering CT acquisition station multichannel data acquisition and line concentration arrangement system - Google Patents
Engineering CT acquisition station multichannel data acquisition and line concentration arrangement system Download PDFInfo
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- CN209946681U CN209946681U CN201921225314.6U CN201921225314U CN209946681U CN 209946681 U CN209946681 U CN 209946681U CN 201921225314 U CN201921225314 U CN 201921225314U CN 209946681 U CN209946681 U CN 209946681U
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Abstract
The utility model provides an engineering CT acquisition station multichannel data acquisition and line concentration arrangement system, the acquisition box is provided with two 8-core plugs, each 8-core plug is connected with 4 acceleration sensors in series through a 6-core aviation socket; the 1 st acceleration sensor, the 2 nd acceleration sensor, the 3 rd acceleration sensor and the 4 th acceleration sensor are sequentially arranged, and the interval between two adjacent acceleration sensors is 1 meter. Has the advantages that: only two channels of each original acquisition box are increased to eight acquisition channels, so that 8 acceleration sensors can be connected at the same time, and each four acquisition lines are correspondingly and reasonably designed, so that wires are reasonably used; and through designing acquisition circuit, guarantee the signal acquisition precision to effectively improved the detection efficiency to big structural component.
Description
Technical Field
The utility model belongs to the technical field of multichannel data acquisition, concretely relates to engineering CT gathers station multichannel data acquisition and line concentration arrangement system.
Background
In the nondestructive detection of the pouring quality of the concrete beam plate of the road and bridge, the internal structure mechanical characteristics and the pouring compactness of the beam plate are very important problems in the engineering construction process for a long time. In the actual production and construction process, because various adverse factors, such as nonstandard construction process, adverse construction weather, production environment and the like, may affect the pouring quality of the concrete beam slab, and the conditions of cavities, honeycombs, incompact vibration and the like occur, so that the service life and safety of the beam slab are affected.
The theory basis of the elastic wave CT imaging technology is that according to the geometrical kinematics principle of seismic wave rays, a receiving detector and a transmitting detector are installed on a detected block, one end of the detected block receives other three-surface transmission to form a ray rectangle, the detected block is scanned by the seismic waves, and the travel time, wave velocity and energy attenuation condition of the seismic waves are analyzed by using data collected by the detectors to draw CT imaging. According to scientific research, the beam plate concrete has good positive correlation of elastic property, internal structure and wave speed in the CT detection process. When the wave velocity is higher, the elastic modulus of the concrete beam plate is higher, the strength is also higher, and the pouring quality is better. When the concrete has defects inside, the wave velocity of the seismic waves passing through the defects is lower than that of the normal part. Therefore, the nondestructive testing of the concrete quality of the beam plate can be realized by collecting and analyzing the seismic wave signals of the concrete of the beam plate.
In the engineering CT data acquisition instrument in the prior art, each acquisition box is provided with two 8-core plugs, and each plug can be connected with one acceleration sensor, so that two acceleration sensors can be configured in each acquisition box, and data acquisition of two acquisition channels is realized. When the detection object is a large-area beam slab, multiple data acquisition is required, and the problem of low data acquisition efficiency is caused.
SUMMERY OF THE UTILITY MODEL
The defect to prior art existence, the utility model provides an engineering CT gathers station multichannel data acquisition and line concentration arrangement system can effectively solve above-mentioned problem.
The utility model adopts the technical scheme as follows:
the utility model provides an engineering CT acquisition station multichannel data acquisition and line concentration arrangement system, the acquisition box is provided with two 8-core plugs, each 8-core plug is connected with 4 acceleration sensors in series through a 6-core aviation socket;
wherein each of the 8-core plugs comprises an A1 data line pin, an A2 data line pin, an A3 data line pin, an A4 data line pin, an A1 ground line pin, an A2 ground line pin, an A3 ground line pin, and an A4 ground line pin;
the 6-core aviation socket comprises a B1 data line pin, a B2 data line pin, a B3 data line pin, a B4 data line pin, a B1 ground line pin and a B2 ground line pin;
the A1 data line pin is connected to one end of the B1 data line pin through a C1 data line; the A2 data line pin is connected to one end of the B2 data line pin through a C2 data line; the A3 data line pin is connected to one end of the B3 data line pin through a C3 data line; the A4 data line pin is connected to one end of the B4 data line pin through a C4 data line; the ground wire led out from the A1 th ground wire pin and the ground wire led out from the A2 th ground wire pin are connected together to form a C1 th ground wire, and the ground wires are connected to one end of the B1 th ground wire pin; the A3 ground wire pin and the ground wire led out from the A4 ground wire pin are connected together to form a C2 ground wire, and the A3 ground wire pin is connected to one end of the B2 ground wire pin;
the ground wire led out from the other end of the B1 th ground wire pin is divided into two ground wires which are respectively a D1 th ground wire and a D2 th ground wire; the ground wire led out from the other end of the B2 ground wire pin is divided into two ground wires which are respectively a D3 th ground wire and a D4 th ground wire;
the other end of the B1 data line pin leads out an E1 data line; the other end of the B2 data line pin leads out an E2 data line; the other end of the B3 data line pin leads out an E3 data line; the other end of the B4 data line pin leads out an E4 data line;
the E1 th data line and the D1 th ground line are commonly wired to the 1 st acceleration sensor; the E2 th data line and the D2 th ground line are commonly wired to a2 nd acceleration sensor; the E3 th data line and the D3 th ground line are commonly wired to a3 rd acceleration sensor; the E4 th data line and the D4 th ground line are wired in common to a4 th acceleration sensor.
Preferably, the 1 st acceleration sensor, the 2 nd acceleration sensor, the 3 rd acceleration sensor and the 4 th acceleration sensor are sequentially arranged, and an interval between two adjacent acceleration sensors is 1 meter.
The utility model provides an engineering CT gathers station multichannel data acquisition and line concentration arrangement system has following advantage:
only two channels of each original acquisition box are increased to eight acquisition channels, so that 8 acceleration sensors can be connected at the same time, and each four acquisition lines are correspondingly and reasonably designed, so that wires are reasonably used; and through designing acquisition circuit, guarantee the signal acquisition precision to effectively improved the detection efficiency to big structural component.
Drawings
Fig. 1 is a schematic structural view of a multichannel data acquisition and line concentration arrangement system of an engineering CT acquisition station provided by the present invention;
FIG. 2 is a schematic diagram of the multi-channel data acquisition and line concentration arrangement system of the engineering CT acquisition station provided by the present invention;
FIG. 3 is a schematic diagram of an acquisition circuit board;
FIG. 4 is a circuit diagram of a signal conditioning circuit;
fig. 5 is a circuit diagram of the AD 8426.
Detailed Description
In order to make the technical problem, technical solution and advantageous effects solved by the present invention more clearly understood, the following description is given in conjunction with the accompanying drawings and embodiments to further explain the present invention in detail. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.
The utility model provides an engineering CT gathers station multichannel data acquisition and line concentration arrangement system increases to eight collection passageways only two passageways with original every collection box to can connect 8 acceleration sensor simultaneously, carry out corresponding rational design with every four collection lines simultaneously, make the wire rod obtain rational use, stop extravagantly. The utility model discloses effectively improved the detection efficiency to big structural component.
Referring to fig. 1, the acquisition box is configured with two 8-core plugs, each 8-core plug passing through a 6-core aviation socket, and being connected in series with 4 acceleration sensors; in fig. 1, two 6-core aircraft sockets are designated by H1 and H2, respectively. 6 core aviation socket adopts push-and-pull auto-lock aviation socket 6 cores, and to 6 core aviation sockets that H1 represents, 4 acceleration sensor that its connection is: the 1 st acceleration sensor, the 2 nd acceleration sensor, the 3 rd acceleration sensor and the 4 th acceleration sensor. The 1 st, 2 nd, 3 rd and 4 th acceleration sensors are denoted by F1, F2, F3 and F4, respectively. The 4 acceleration sensors are sequentially arranged in sequence, and the interval between two adjacent acceleration sensors is 1 meter. For a 6-core aviation socket represented by H2, the 4 acceleration sensors connected thereto are respectively represented in the figure as: g1, G2, G3 and G4.
In actual arrangement, for each 6-core aviation socket, the outgoing cable branches are bundled by using a snakeskin mesh wire, and then an M5 connector is connected every 1M for connecting an acceleration sensor. The design can make acceleration sensor's wiring distance 1 meter at most, has effectively increased and has detected application scope, realizes the shock wave detection to the structural component of certain length.
The specific wiring principle is as follows:
referring to fig. 2, each 8-core plug includes an a1 th data line pin, an a2 th data line pin, an A3 th data line pin, an a4 th data line pin, an a1 th ground line pin, an a2 th ground line pin, an A3 th ground line pin, and an a4 th ground line pin. In fig. 2, an 8-core plug is indicated at 15. The A1 data line pin, the A2 data line pin, the A3 data line pin, and the A4 data line pin are denoted by numerals 1, 3, 5, and 7, respectively. The A1 th, A2 th, A3 th and A4 th ground pins are denoted by the numerals 1, 2, 6 and 8, respectively. That is, an 8-core plug has 4 data line pins and 4 ground line pins.
The 6-core aviation socket comprises a B1 data line pin, a B2 data line pin, a B3 data line pin, a B4 data line pin, a B1 ground line pin and a B2 ground line pin; in fig. 2, a B1 data line pin, a B2 data line pin, a B3 data line pin, and a B4 data line pin are denoted by 9, 11, 12, and 14, respectively. The B1 th and B2 th ground pins are designated 10 and 13, respectively.
The A1 data line pin is connected to one end of the B1 data line pin through a C1 data line; the A2 data line pin is connected to one end of the B2 data line pin through a C2 data line; the A3 data line pin is connected to one end of the B3 data line pin through a C3 data line; the A4 data line pin is connected to one end of the B4 data line pin through a C4 data line; the ground wire led out from the A1 th ground wire pin and the ground wire led out from the A2 th ground wire pin are connected together to form a C1 th ground wire, and the ground wires are connected to one end of the B1 th ground wire pin; the A3 ground wire pin and the ground wire led out from the A4 ground wire pin are connected together to form a C2 ground wire, and the A3 ground wire pin is connected to one end of the B2 ground wire pin;
the ground wire led out from the other end of the B1 th ground wire pin is divided into two ground wires which are respectively a D1 th ground wire and a D2 th ground wire; the ground wire led out from the other end of the B2 ground wire pin is divided into two ground wires which are respectively a D3 th ground wire and a D4 th ground wire;
the other end of the B1 data line pin leads out an E1 data line; the other end of the B2 data line pin leads out an E2 data line; the other end of the B3 data line pin leads out an E3 data line; the other end of the B4 data line pin leads out an E4 data line;
the E1 th data line and the D1 th ground line are commonly wired to the 1 st acceleration sensor; the E2 th data line and the D2 th ground line are commonly wired to a2 nd acceleration sensor; the E3 th data line and the D3 th ground line are commonly wired to a3 rd acceleration sensor; the E4 th data line and the D4 th ground line are wired in common to a4 th acceleration sensor. Therefore, each acceleration sensor is connected to a data line and a ground wire, and the function of transmitting data signals upwards is achieved.
Inside the collection box that this application provided, have with 8 core plug electric connection's circuit board, the circuit board includes signal conditioning circuit, analog-to-digital conversion circuit, single chip microcomputer system and wireless transmission module and constitutes. Fig. 3 is a schematic diagram of the acquisition circuit board.
The single chip microcomputer system adopts an STM32F single chip microcomputer. STM32F407 is a high-performance ARM single chip microcomputer designed by Italian semiconductors based on Cortex-M4.
The wireless transmission module is designed by adopting a wireless transceiving chip Si4463-B01 based on a SiliconLab company, is a 433M wireless transceiving module with high performance, supports multiple modulation and demodulation modes, uses an international universal ISM frequency band of 433.92M, and has the highest baud rate of 500 Kbps.
ADC of the acquisition station, ADS8568 of Burr-Brown product line of Texas instruments, which is a 16bits analog-to-digital converter with highest performance in industry for TI push-out industrial application. The ADS8568 has excellent performance, and completely meets the precision sampling requirement of the wireless signal acquisition instrument for 0-4 kHz analog signals.
The signal of the sensor is transmitted to the single chip microcomputer through the signal conditioning circuit and the analog-to-digital conversion circuit, and the single chip microcomputer uploads data through the wireless module. As shown in fig. 4, the circuit diagram of the signal conditioning circuit is shown, and the signal conditioning circuit is composed of an instrumentation amplifier AD8426, a programmable amplifier PGA112, and a precision amplifier TLV272 at the front end.
The AD8426 is a dual-channel, low-cost, wide power supply voltage range instrumentation amplifier, and only one external resistor is needed to set the gain, as shown in fig. 5, which ranges from 1 to 1000. The wide input range and rail-to-rail output make the signal fully available to the supply rail. Since the input range can also be reduced below the negative supply voltage, small signals close to ground voltage can be amplified without the need for dual power supplies. The device adopts a double power supply of +/-1.35V to +/-18V or a single power supply of 2.2V to 36V for power supply. In addition to having an ultra-wide supply voltage, the voltage at the input of the AD8426, even if it reaches ± 35V, ensures that the device is not damaged when the power supply is low.
Because the distance between the sensor and the trigger point can be from 0.5m to 50m or even hundreds of meters, the vibration wave can be attenuated in the tested piece to different degrees, so the PGA112 is added into the conditioning circuit as a programmable amplifier, and is placed behind the preamplifier to further adjust and amplify the gain of the signal. The PGA112 has rail-to-rail input and output, low noise, low input bias current, less than 0.1% amplifier error, programmable gain range of 1-200V/V, fast gain switching of 200ns, and analog bandwidth of 1MHz @ G ═ 1 or more. And a precision amplifier is connected behind the PGA112 programmable amplifier to further amplify the signals and ensure the precision of the signals acquired by the singlechip.
The utility model provides an engineering CT gathers station multichannel data acquisition and line concentration arrangement system has following advantage:
only two channels of each original acquisition box are increased to eight acquisition channels, so that 8 acceleration sensors can be connected at the same time, and each four acquisition lines are correspondingly and reasonably designed, so that wires are reasonably used; and through designing acquisition circuit, guarantee the signal acquisition precision to effectively improved the detection efficiency to big structural component.
The foregoing is only a preferred embodiment of the present invention, and it should be noted that, for those skilled in the art, a plurality of improvements and decorations can be made without departing from the principle of the present invention, and these improvements and decorations should also be viewed as the protection scope of the present invention.
Claims (2)
1. A multi-channel data acquisition and line concentration arrangement system of an engineering CT acquisition station is characterized in that an acquisition box is provided with two 8-core plugs, and each 8-core plug is connected with 4 acceleration sensors in series through a 6-core aviation socket;
wherein each of the 8-core plugs comprises an A1 data line pin, an A2 data line pin, an A3 data line pin, an A4 data line pin, an A1 ground line pin, an A2 ground line pin, an A3 ground line pin, and an A4 ground line pin;
the 6-core aviation socket comprises a B1 data line pin, a B2 data line pin, a B3 data line pin, a B4 data line pin, a B1 ground line pin and a B2 ground line pin;
the A1 data line pin is connected to one end of the B1 data line pin through a C1 data line; the A2 data line pin is connected to one end of the B2 data line pin through a C2 data line; the A3 data line pin is connected to one end of the B3 data line pin through a C3 data line; the A4 data line pin is connected to one end of the B4 data line pin through a C4 data line; the ground wire led out from the A1 th ground wire pin and the ground wire led out from the A2 th ground wire pin are connected together to form a C1 th ground wire, and the ground wires are connected to one end of the B1 th ground wire pin; the A3 ground wire pin and the ground wire led out from the A4 ground wire pin are connected together to form a C2 ground wire, and the A3 ground wire pin is connected to one end of the B2 ground wire pin;
the ground wire led out from the other end of the B1 th ground wire pin is divided into two ground wires which are respectively a D1 th ground wire and a D2 th ground wire; the ground wire led out from the other end of the B2 ground wire pin is divided into two ground wires which are respectively a D3 th ground wire and a D4 th ground wire;
the other end of the B1 data line pin leads out an E1 data line; the other end of the B2 data line pin leads out an E2 data line; the other end of the B3 data line pin leads out an E3 data line; the other end of the B4 data line pin leads out an E4 data line;
the E1 th data line and the D1 th ground line are commonly wired to the 1 st acceleration sensor; the E2 th data line and the D2 th ground line are commonly wired to a2 nd acceleration sensor; the E3 th data line and the D3 th ground line are commonly wired to a3 rd acceleration sensor; the E4 th data line and the D4 th ground line are wired in common to a4 th acceleration sensor.
2. The engineering CT acquisition station multichannel data acquisition and line concentration arrangement system according to claim 1, wherein the 1 st acceleration sensor, the 2 nd acceleration sensor, the 3 rd acceleration sensor and the 4 th acceleration sensor are sequentially arranged in sequence, and an interval between two adjacent acceleration sensors is 1 meter.
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| Application Number | Priority Date | Filing Date | Title |
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| CN201921225314.6U CN209946681U (en) | 2019-07-31 | 2019-07-31 | Engineering CT acquisition station multichannel data acquisition and line concentration arrangement system |
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| CN201921225314.6U CN209946681U (en) | 2019-07-31 | 2019-07-31 | Engineering CT acquisition station multichannel data acquisition and line concentration arrangement system |
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