CN111412827A - Roadbed magnetic displacement sensor, settlement monitoring device and settlement monitoring method - Google Patents
Roadbed magnetic displacement sensor, settlement monitoring device and settlement monitoring method Download PDFInfo
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- CN111412827A CN111412827A CN202010385734.1A CN202010385734A CN111412827A CN 111412827 A CN111412827 A CN 111412827A CN 202010385734 A CN202010385734 A CN 202010385734A CN 111412827 A CN111412827 A CN 111412827A
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B7/00—Measuring arrangements characterised by the use of electric or magnetic techniques
- G01B7/02—Measuring arrangements characterised by the use of electric or magnetic techniques for measuring length, width or thickness
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01D—MEASURING NOT SPECIALLY ADAPTED FOR A SPECIFIC VARIABLE; ARRANGEMENTS FOR MEASURING TWO OR MORE VARIABLES NOT COVERED IN A SINGLE OTHER SUBCLASS; TARIFF METERING APPARATUS; MEASURING OR TESTING NOT OTHERWISE PROVIDED FOR
- G01D5/00—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable
- G01D5/12—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means
- G01D5/244—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains
- G01D5/247—Mechanical means for transferring the output of a sensing member; Means for converting the output of a sensing member to another variable where the form or nature of the sensing member does not constrain the means for converting; Transducers not specially adapted for a specific variable using electric or magnetic means influencing characteristics of pulses or pulse trains; generating pulses or pulse trains using time shifts of pulses
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Abstract
The invention discloses a roadbed magnetic displacement sensor, a settlement monitoring device and a settlement monitoring method. A magnetostrictive displacement sensor is arranged in a settling pipe of the roadbed magnetic displacement sensor arranged in the roadbed body; the sedimentation magnetic ring is fixed in the roadbed body and is in sliding connection with the outer wall of the sedimentation pipe; the magnetostrictive displacement sensor comprises an electronic cabin and a waveguide rod; the waveguide rod penetrates through the sedimentation magnetic ring, one end of the waveguide rod is connected with one end of the electronic bin, and the other end of the waveguide rod is suspended in the air; the electronic bin is used for loading the emitted excitation signal to the waveguide rod, receiving a first force magnetic coupling elastic wave generated at the position of the waveguide tube corresponding to the settlement magnetic ring and a second force magnetic coupling elastic wave generated at the suspended end of the waveguide tube, and obtaining a roadbed displacement value according to the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave. The invention can realize accurate and efficient monitoring of settlement.
Description
Technical Field
The invention relates to the technical field of settlement monitoring, in particular to a roadbed magnetic displacement sensor, a settlement monitoring device and a settlement monitoring method.
Background
Settlement monitoring is a common monitoring method in the field of geotechnical engineering and is widely used for settlement monitoring in the filling process and after completion of engineering such as dams, road beds, embankments and the like. The layered settlement is mainly monitored by a layered settlement meter at present, the working principle of the layered settlement meter is mainly that according to the electromagnetic induction principle, a settlement pipe sleeved with a magnetic induction settlement ring is lengthened section by section according to the filling progress of a soil body, a settlement magnetic ring is driven to sink synchronously when the soil body settles, a probe connected with a graduated scale is slowly put into the settlement pipe, when the probe meets the settlement magnetic ring, an electromagnetic induction signal is generated and sent to an earth surface instrument for display, and meanwhile, an acousto-optic alarm is sent out, and the scale of the graduated scale at an orifice is read, namely the distance between the position of the settlement magnetic ring and the orifice. The settlement amount of the stratum at the positions of the settlement magnetic rings can be obtained by comparing the change of the positions of the settlement magnetic rings along with the change of time.
The method has a plurality of defects in practical monitoring: (1) the manual measurement and reading precision is poor, the labor intensity is high, and the working efficiency is low; (2) in typhoon or rainstorm weather, particularly at night, the observation risk coefficient of personnel is high; (3) the manual observation cannot realize real-time and continuous observation, and the requirement of informatization development is difficult to meet.
Disclosure of Invention
Based on this, it is necessary to provide a magnetic displacement sensor for a roadbed, a settlement monitoring device and a settlement monitoring method, so as to realize accurate and efficient settlement monitoring.
In order to achieve the purpose, the invention provides the following scheme:
a roadbed magnetic displacement sensor is arranged in a roadbed body; the roadbed magnetic displacement sensor comprises: the sedimentation pipe, the sedimentation magnetic ring and the magnetostrictive displacement sensor are arranged on the sedimentation pipe;
the magnetostrictive displacement sensor is arranged in the settling tube; the sedimentation magnetic ring is fixed in the roadbed body and is in sliding connection with the outer wall of the sedimentation pipe; the magnetostrictive displacement sensor comprises an electronic cabin and a waveguide rod; the waveguide rod penetrates through the sedimentation magnetic ring, one end of the waveguide rod is connected with one end of the electronic bin, and the other end of the waveguide rod is suspended in the air; the electronic bin is used for loading the emitted excitation signal to the waveguide rod, receiving a first force magnetic coupling elastic wave generated at the position of the waveguide tube corresponding to the settlement magnetic ring and a second force magnetic coupling elastic wave generated at the suspended end of the waveguide tube, and obtaining a roadbed displacement value according to the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave.
Optionally, the electronic cabin includes a communication control circuit, and an excitation pulse generating circuit, a magnetoelastic wave detecting circuit, and a time measuring circuit connected to the communication control circuit; the communication control circuit is used for sending a pulse control signal to the excitation pulse generating circuit, sending the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave detected by the magnetic elastic wave detection circuit to the time measuring circuit, receiving a first time difference signal corresponding to the first force magnetic coupling elastic wave sent by the time measuring circuit, receiving a second time difference signal corresponding to the second force magnetic coupling elastic wave sent by the time measuring circuit, and obtaining a roadbed displacement value according to the time difference signal.
Optionally, the roadbed magnetic displacement sensor further comprises: settling magnetic ring flukes; the settlement magnetic ring is fixed in the roadbed body through the settlement magnetic ring fluke.
Optionally, the roadbed magnetic displacement sensor further comprises an upper fixed disc and a lower fixed disc; the upper fixed disc is arranged at one end of the settling pipe; the lower fixed disc is arranged at the other end of the settling tube; the subgrade magnetic displacement sensor is arranged in a settling pipe between the upper fixed disc and the lower fixed disc; the distance between the upper fixed disc and the settlement magnetic ring is larger than the maximum displacement of the corresponding roadbed layer; the upper fixing disc and the lower fixing disc are used for fixing the roadbed magnetic displacement sensor.
Optionally, the magnetostrictive displacement sensor further comprises: a sensor housing; the electronic bin and the waveguide rod are both positioned inside the sensor shell; the electronic bin is fixed on the sensor shell; the sensor shell is fixed inside the sedimentation pipe through the upper fixing disc and the lower fixing disc.
Optionally, the roadbed magnetic displacement sensor further comprises: an external singlechip controller and an external acquisition device; the external single chip microcomputer controller and the external acquisition device are in communication connection with the electronic bin; the external single chip microcomputer controller is used for sending monitoring control signals to the electronic cabin so as to control the electronic cabin to send out excitation signals; and the external acquisition device is used for acquiring the displacement value of the roadbed.
Optionally, the electronic cabin further includes: a timing controller; the timing controller is connected with the communication control circuit; the timing controller is used for sending monitoring control signals to the communication control circuit at set intervals so that the communication control circuit controls the excitation pulse generating circuit to generate excitation signals.
The invention also provides a settlement monitoring device, which comprises a plurality of the roadbed magnetic displacement sensors; one said magnetic displacement sensor is located in a roadbed layer; and the end parts of the settling pipes of two adjacent roadbed magnetic displacement sensors are fixedly connected.
Optionally, the sedimentation monitoring apparatus further includes: an external singlechip controller and an external acquisition device; the external single chip microcomputer controller and the external acquisition device are in communication connection with the electronic bins of the roadbed magnetic displacement sensors; the external single chip microcomputer controller is used for sending monitoring control signals to the electronic cabin so as to control the electronic cabin to send out excitation signals; the external acquisition device is used for acquiring displacement values of all the road base layers.
The invention also provides a settlement monitoring method, which is used for the settlement monitoring device; the method comprises the following steps:
acquiring a monitoring control signal and sending an excitation signal;
after the excitation signal is loaded on the waveguide rod, a first force magnetic coupling elastic wave generated at the position of the waveguide tube corresponding to the settlement magnetic ring and a second force magnetic coupling elastic wave generated at the suspended end of the waveguide tube are obtained;
determining a first time stop signal corresponding to the first force magnetic coupling elastic wave and a second time stop signal corresponding to the second force magnetic coupling elastic wave;
calculating a first time difference signal corresponding to a first force magnetic coupling elastic wave according to the generation time of the first time stop signal and the excitation signal, and calculating a second time difference signal corresponding to a second force magnetic coupling elastic wave according to the generation time of the second time stop signal and the excitation signal;
obtaining the position of a sedimentation magnetic ring according to the first time difference signal, the second time difference signal and the length of the waveguide tube;
and determining the displacement value of the corresponding roadbed layer according to the position of the settlement magnetic ring.
Compared with the prior art, the invention has the beneficial effects that:
the invention provides a roadbed magnetic displacement sensor, a settlement monitoring device and a settlement monitoring method. This subgrade magnetic displacement sensing who sets up in the subgrade body includes: the sedimentation pipe, the sedimentation magnetic ring and the magnetostrictive displacement sensor are arranged on the sedimentation pipe; a magnetostrictive displacement sensor is arranged in the settling tube; the sedimentation magnetic ring is fixed in the roadbed body and is in sliding connection with the outer wall of the sedimentation pipe; the magnetostrictive displacement sensor comprises an electronic cabin and a waveguide rod. By arranging the magnetostrictive displacement sensor, the invention realizes real-time and continuous automatic monitoring, avoids manual measurement and reading, improves the accuracy of settlement monitoring and improves the monitoring efficiency.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings needed to be used in the embodiments will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings without inventive exercise.
Fig. 1 is a schematic structural view of a roadbed magnetic displacement sensor in embodiment 1 of the invention;
FIG. 2 is a schematic circuit diagram of the communication control circuit and TDC measurement circuit of the present invention;
FIG. 3 is a schematic circuit diagram of the excitation pulse generating circuit of the present invention;
FIG. 4 is a schematic circuit diagram of a magnetoelastic wave detection circuit according to the present invention;
FIG. 5 is a circuit schematic of the time of day discrimination circuit of the present invention;
FIG. 6 is a schematic diagram of a communication interface of the present invention;
fig. 7 is a schematic structural diagram of a settlement monitoring device in embodiment 2 of the present invention.
Detailed Description
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 only a part of the embodiments of the present invention, and not all of the embodiments. 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.
In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in further detail below.
Example 1
Fig. 1 is a schematic structural diagram of a roadbed magnetic displacement sensor according to embodiment 1 of the present invention.
Referring to fig. 1, the roadbed magnetic displacement sensor of the embodiment is arranged in a roadbed body; the roadbed magnetic displacement sensor comprises: settling pipe 3, settling magnetic ring 5 and magnetostrictive displacement sensor.
The magnetostrictive displacement sensor is arranged in the settling tube 3; the sedimentation magnetic ring 5 is fixed in the roadbed body and is in sliding connection with the outer wall of the sedimentation pipe 3; the magnetostrictive displacement sensor comprises an electronic cabin 6 and a waveguide rod 7; the waveguide rod 7 penetrates through the sedimentation magnetic ring 5, one end of the waveguide rod 7 is connected with one end of the electronic bin 6, and the other end of the waveguide rod 7 is suspended; the electronic bin 6 is used for loading the emitted excitation signal to the waveguide rod 7, receiving a first force magnetic coupling elastic wave generated at the position of the waveguide corresponding to the settlement magnetic ring 5 and a second force magnetic coupling elastic wave generated at the suspended end of the waveguide, and obtaining a roadbed displacement value according to the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave.
In this embodiment, a waveguide wire is disposed in the waveguide rod 7, and a damper is disposed at a suspended end of the waveguide rod 7.
As an optional implementation, the electronic cabin 6 includes a communication control circuit, and an excitation pulse generating circuit, a magnetoelastic wave detecting circuit, and a time measuring circuit connected to the communication control circuit; the communication control circuit is used for sending a pulse control signal to the excitation pulse generating circuit, sending the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave detected by the magnetic elastic wave detection circuit to the time measuring circuit, receiving a first time difference signal corresponding to the first force magnetic coupling elastic wave sent by the time measuring circuit, receiving a second time difference signal corresponding to the second force magnetic coupling elastic wave sent by the time measuring circuit, and obtaining a roadbed displacement value according to the time difference signal. The time measuring circuit comprises a time discrimination circuit and a TDC time measuring circuit; the time discrimination circuit is used for determining a first time stop signal corresponding to the first force magnetic coupling elastic wave and a second time stop signal corresponding to the second force magnetic coupling elastic wave; the TDC time measurement circuit is used for calculating a difference value between the first time stop signal and the first time stop signal to obtain a time difference signal. A circuit schematic diagram of the communication control circuit and the circuit at the time of TDC is shown in fig. 2, a circuit schematic diagram of the excitation pulse generating circuit is shown in fig. 3, a circuit schematic diagram of the magnetoelastic wave detecting circuit is shown in fig. 4, and a circuit schematic diagram of the time discriminating circuit is shown in fig. 5.
As an alternative embodiment, the magnetoelastic wave detection circuit is a detection coil.
As an alternative embodiment, the ballast magnetic displacement sensor further comprises: a settlement magnet ring fluke 4; the settlement magnet ring fluke 4 is arranged on the settlement magnet ring 5 and clamped in the roadbed body, so that the settlement magnet ring 5 is fixed in the roadbed body.
As an alternative embodiment, the settling tube 3 is a PVC tube, and the length of the settling tube 3 is generally 2m to 4 m; and mortar or undisturbed soil is backfilled between the settling pipe 3 and the bedrock.
As an optional embodiment, the roadbed magnetic displacement sensor further comprises an upper fixed disc 1 and a lower fixed disc 8; the upper fixed disc 1 is arranged at one end of the settling tube 3; the lower fixed disc 8 is arranged at the other end of the settling tube 3; the subgrade magnetic displacement sensor is arranged in a settling pipe 3 between the upper fixed disk 1 and the lower fixed disk 8; the distance between the upper fixed disc 1 and the sedimentation magnetic ring 5 is larger than the maximum displacement of the corresponding roadbed; the upper fixed disc 1 and the lower fixed disc 8 are used for fixing the roadbed magnetic displacement sensor.
As an alternative embodiment, the magnetostrictive displacement sensor further comprises: a sensor housing 2; the electronic bin 6 and the waveguide rod 7 are both positioned inside the sensor shell 2; the electronic bin 6 is fixed on the sensor shell 2; the sensor shell 2 is fixed inside the sedimentation pipe 3 through the upper fixing disc 1 and the lower fixing disc 8. Specifically, the upper fixed disk 1 is fixedly connected with the sensor shell 2 through bolts; the lower fixing disc 8 with the sensor housing 2 passes through the bolt rigid coupling, the external diameter of upper fixing disc 1 with the external diameter of lower fixing disc 8 all with the internal diameter of sedimentation pipe 3 is the same, upper fixing disc 1 lower fixing disc 8 is in through 1 row of 4 screw rigid couplings the different degree of depth of sedimentation pipe 3 for fixed sensor housing 2.
As an alternative embodiment, the ballast magnetic displacement sensor further comprises: an external singlechip controller and an external acquisition device. The electronic bin 6 is connected with a communication cable; and one end of the communication cable is connected with the electronic bin 6, and the other end of the communication cable penetrates through preformed holes in the upper fixed disk 1 and the lower fixed disk 8 to lead to a pipe orifice and is connected with an external single chip microcomputer controller and an external acquisition device. The external single chip microcomputer controller and the external acquisition device are in communication connection with the electronic bin 6 through communication cables; the external single chip microcomputer controller is used for sending monitoring control signals to the electronic cabin 6 so as to control the electronic cabin 6 to send out excitation signals; and the external acquisition device is used for acquiring the displacement value of the roadbed. Specifically, the communication control circuit in the electronic cabin 6 is connected with the external single chip microcomputer controller and the external acquisition device through a communication interface. A schematic diagram of the communication interface is shown in fig. 6.
As an optional implementation, the electronic cabin 6 further includes: a timing controller; the timing controller is connected with the communication control circuit; the timing controller is used for sending monitoring control signals to the communication control circuit at set intervals so that the communication control circuit controls the excitation pulse generating circuit to generate excitation signals.
As an alternative embodiment, the inner diameter of the sedimentation magnet ring 5 is the same as the outer diameter of the sedimentation pipe 3.
In an alternative embodiment, the electronic cabin 6 is fixedly connected with the waveguide rod 7 through threads.
The working principle of the roadbed magnetic displacement sensor in the embodiment is as follows: an external single-chip microcomputer controller or a timing controller controls an excitation pulse generating circuit through a communication control circuit to generate a pulse signal with a certain period as an excitation source, then a narrow pulse excitation signal with a certain amplitude is generated through pulse width modulation and power amplification, and the narrow pulse excitation signal is loaded on a waveguide wire and coupled with a permanent magnet to generate a force magnetic coupling elastic wave; the detection coil detects a first force magnetic coupling elastic wave generated at the position of the waveguide tube corresponding to the sedimentation magnetic ring 5 and a second force magnetic coupling elastic wave generated at the suspended end of the waveguide tube, and the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave are subjected to signal conditioning through a signal filtering and amplifying circuit; and time stop signals corresponding to the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave are obtained through the time identification circuit and are sent to the TDC time measurement circuit for time measurement.
The TDC time measurement circuit calculates the time difference between the first time stop signal corresponding to the first electromagnetic coupling elastic wave and the generation time (current pulse) of the excitation signal to obtain a first time difference T1Calculating the time difference between the second time stop signal corresponding to the second magnetic coupling elastic wave and the excitation signal generation time (current pulse) to obtain a second time difference T2. Let the length of the settling tube 3 be H, according to H ═ T1/T2) × H calculates the position of the subsidence magnetic ring 5, thereby obtaining the displacement value of the roadbed, and then sends the displacement value to other equipment in a communication mode and a data output mode.
The magnetic displacement sensor for the roadbed realizes real-time and continuous automatic monitoring on settlement, avoids manual measurement and reading, improves the accuracy of settlement monitoring, improves the monitoring efficiency and greatly reduces the labor cost; simple structure, simple and convenient installation.
Example 2
The invention also provides a settlement monitoring device, and fig. 7 is a schematic structural diagram of a settlement monitoring device in embodiment 2 of the invention.
Referring to fig. 7, the settlement monitoring device of the present embodiment includes a plurality of the roadbed magnetic displacement sensors of the above embodiment 1; one said magnetic displacement sensor is located in a roadbed layer; and the end parts of the settling pipes 3 of two adjacent roadbed magnetic displacement sensors are fixedly connected. The detailed structure of the roadbed magnetic displacement sensor is not described in detail herein, and it is sufficient to refer to embodiment 1.
As an alternative embodiment, the settling pipe 3 in the roadbed magnetic displacement sensor is made of a PVC pipe, and the length of a single settling pipe 3 is generally 2 m-4 m; the bottom of the settling pipe 3 is buried in bedrock, the buried depth is generally 0.5 m-1.0 m, and mortar or undisturbed soil is backfilled between the settling pipe 3 and the bedrock; the sedimentation pipes 3 are connected to the top surface of the filling body one by one along with the layered filling of the filling body, and the pipe openings of the sedimentation pipes 3 closest to the top surface of the filling body are lower than the top surface of the filling body.
As an optional implementation, the sedimentation monitoring apparatus further includes: an external singlechip controller and an external acquisition device; the external single chip microcomputer controller and the external acquisition device are in communication connection with the electronic bin 6 of each roadbed magnetic displacement sensor; the external single chip microcomputer controller is used for sending monitoring control signals to the electronic cabin 6 so as to control the electronic cabin 6 to send out excitation signals; the external acquisition device is used for acquiring displacement values of all the road base layers.
As an alternative embodiment, the ends of the settling legs 3 of two adjacent roadbed magnetic displacement sensors are fixedly connected through a pipe hoop.
The settlement monitoring device of this embodiment, the magnetostrictive displacement sensor is equipped with through upper fixed disk 1, lower fixed disk 8 in the sedimentation pipe 3 among each road bed magnetic displacement sensor, and the outer wall cover of sedimentation pipe 3 has settlement magnetic ring 5, and the distance between settlement magnetic ring 5 and the upper fixed disk 1 is greater than the maximum displacement volume of this layer of road bed. The settling pipes 3 are connected one by one along with the filling of the roadbed until reaching the top surface of the roadbed.
The realization principle of the settlement monitoring device of the embodiment is as follows:
when the roadbed is displaced, the subsidence magnetic ring 5 sleeved outside the subsidence pipe 3 is driven to move through the subsidence magnetic ring fluke 4, relative displacement is generated between the subsidence magnetic ring 5 and the waveguide rod 7, an excitation signal in the electronic bin 6 is transmitted along the waveguide rod 7 and coupled with the subsidence magnetic ring 5, and a force magnetic coupling elastic wave is generated; a detection coil in the electronic bin 6 detects a first force magnetic coupling elastic wave generated at the position of the waveguide tube corresponding to the settlement magnetic ring 5 and a second force magnetic coupling elastic wave generated at the suspended end of the waveguide tube, and the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave are subjected to signal conditioning through a signal filtering and amplifying circuit; and time stop signals corresponding to the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave are obtained through the time identification circuit and are sent to the TDC time measurement circuit for time measurement. The TDC time measurement circuit calculates the time difference between the first time stop signal corresponding to the first electromagnetic coupling elastic wave and the generation time (current pulse) of the excitation signal to obtain a first time difference T1Calculating the time difference between the second time stop signal corresponding to the second magnetic coupling elastic wave and the excitation signal generation time (current pulse) to obtain a second time difference T2. Let the length of the settling tube 3 be H, according to H ═ T1/T2) × H, the position of the magnetic subsidence ring 5 is calculated, because the magnetostrictive displacement sensor is fixed, the displacement variation measured by the magnetostrictive displacement sensor is the displacement of the roadbed on the layer.
The settlement monitoring device realizes real-time, continuous and automatic monitoring of multilayer settlement, avoids manual measurement and reading, improves the accuracy of monitoring the layered settlement, improves the monitoring efficiency and greatly reduces the labor cost; the structure is simple, and the installation is simple and convenient; the device has the advantages of high precision, no temperature drift, no contact, long service life, good stability and the like, and effectively overcomes the defects in the prior art; the method can be widely applied to settlement monitoring in the field of geotechnical engineering and has wide application value.
Example 3
The invention also provides a settlement monitoring method, which is used for the settlement monitoring device in the embodiment 2; the method comprises the following steps:
step 101: and acquiring a monitoring control signal and sending out an excitation signal.
Step 102: and after the excitation signal is obtained and loaded on the waveguide rod 7, a first force magnetic coupling elastic wave generated at the position of the waveguide tube corresponding to the sedimentation magnetic ring 5 and a second force magnetic coupling elastic wave generated at the suspended end of the waveguide tube are obtained.
Step 103: and determining a first time stop signal corresponding to the first force magnetic coupling elastic wave and a second time stop signal corresponding to the second force magnetic coupling elastic wave.
Step 104: and calculating a first time difference signal corresponding to the first force magnetic coupling elastic wave according to the generation time of the first time stop signal and the excitation signal, and calculating a second time difference signal corresponding to the second force magnetic coupling elastic wave according to the generation time of the second time stop signal and the excitation signal.
Step 105: and obtaining the position of the sedimentation magnetic ring 5 according to the first time difference signal, the second time difference signal and the length of the waveguide tube.
Step 106: and determining the displacement value of the corresponding roadbed layer according to the position of the settlement magnetic ring 5.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The principles and embodiments of the present invention have been described herein using specific examples, which are provided only to help understand the method and the core concept of the present invention; meanwhile, for a person skilled in the art, according to the idea of the present invention, the specific embodiments and the application range may be changed. In view of the above, the present disclosure should not be construed as limiting the invention.
Claims (10)
1. A roadbed magnetic displacement sensor is characterized in that the roadbed magnetic displacement sensor is arranged in a roadbed body; the roadbed magnetic displacement sensor comprises: the sedimentation pipe, the sedimentation magnetic ring and the magnetostrictive displacement sensor are arranged on the sedimentation pipe;
the magnetostrictive displacement sensor is arranged in the settling tube; the sedimentation magnetic ring is fixed in the roadbed body and is in sliding connection with the outer wall of the sedimentation pipe; the magnetostrictive displacement sensor comprises an electronic cabin and a waveguide rod; the waveguide rod penetrates through the sedimentation magnetic ring, one end of the waveguide rod is connected with one end of the electronic bin, and the other end of the waveguide rod is suspended in the air; the electronic bin is used for loading the emitted excitation signal to the waveguide rod, receiving a first force magnetic coupling elastic wave generated at the position of the waveguide tube corresponding to the settlement magnetic ring and a second force magnetic coupling elastic wave generated at the suspended end of the waveguide tube, and obtaining a roadbed displacement value according to the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave.
2. The roadbed magnetic displacement sensor of claim 1, wherein the electronic cabin comprises a communication control circuit, and an excitation pulse generation circuit, a magnetoelastic wave detection circuit and a time measurement circuit which are connected with the communication control circuit; the communication control circuit is used for sending a pulse control signal to the excitation pulse generating circuit, sending the first force magnetic coupling elastic wave and the second force magnetic coupling elastic wave detected by the magnetic elastic wave detection circuit to the time measuring circuit, receiving a first time difference signal corresponding to the first force magnetic coupling elastic wave sent by the time measuring circuit, receiving a second time difference signal corresponding to the second force magnetic coupling elastic wave sent by the time measuring circuit, and obtaining a roadbed displacement value according to the time difference signal.
3. The ballast magnetic displacement sensor of claim 1, further comprising: settling magnetic ring flukes; the settlement magnetic ring is fixed in the roadbed body through the settlement magnetic ring fluke.
4. The ballast magnetic displacement sensor of claim 1 further comprising an upper fixed disk and a lower fixed disk; the upper fixed disc is arranged at one end of the settling pipe; the lower fixed disc is arranged at the other end of the settling tube; the subgrade magnetic displacement sensor is arranged in a settling pipe between the upper fixed disc and the lower fixed disc; the distance between the upper fixed disc and the settlement magnetic ring is larger than the maximum displacement of the corresponding roadbed layer; the upper fixing disc and the lower fixing disc are used for fixing the roadbed magnetic displacement sensor.
5. The ballast magnetic displacement sensor of claim 4, further comprising: a sensor housing; the electronic bin and the waveguide rod are both positioned inside the sensor shell; the electronic bin is fixed on the sensor shell; the sensor shell is fixed inside the sedimentation pipe through the upper fixing disc and the lower fixing disc.
6. The ballast magnetic displacement sensor of claim 1, further comprising: an external singlechip controller and an external acquisition device; the external single chip microcomputer controller and the external acquisition device are in communication connection with the electronic bin; the external single chip microcomputer controller is used for sending monitoring control signals to the electronic cabin so as to control the electronic cabin to send out excitation signals; and the external acquisition device is used for acquiring the displacement value of the roadbed.
7. The ballast magnetic displacement sensor of claim 2, wherein the electronics compartment further comprises: a timing controller; the timing controller is connected with the communication control circuit; the timing controller is used for sending monitoring control signals to the communication control circuit at set intervals so that the communication control circuit controls the excitation pulse generating circuit to generate excitation signals.
8. A settlement monitoring device comprising a plurality of roadbed magnetic displacement sensors as claimed in any one of claims 1 to 5; one said magnetic displacement sensor is located in a roadbed layer; and the end parts of the settling pipes of two adjacent roadbed magnetic displacement sensors are fixedly connected.
9. The sedimentation monitoring apparatus as claimed in claim 8, further comprising: an external singlechip controller and an external acquisition device; the external single chip microcomputer controller and the external acquisition device are in communication connection with the electronic bins of the roadbed magnetic displacement sensors; the external single chip microcomputer controller is used for sending monitoring control signals to the electronic cabin so as to control the electronic cabin to send out excitation signals; the external acquisition device is used for acquiring displacement values of all the road base layers.
10. A sedimentation monitoring method, characterized in that the method is used in a sedimentation monitoring device according to claim 8 or 9; the method comprises the following steps:
acquiring a monitoring control signal and sending an excitation signal;
after the excitation signal is loaded on the waveguide rod, a first force magnetic coupling elastic wave generated at the position of the waveguide tube corresponding to the settlement magnetic ring and a second force magnetic coupling elastic wave generated at the suspended end of the waveguide tube are obtained;
determining a first time stop signal corresponding to the first force magnetic coupling elastic wave and a second time stop signal corresponding to the second force magnetic coupling elastic wave;
calculating a first time difference signal corresponding to a first force magnetic coupling elastic wave according to the generation time of the first time stop signal and the excitation signal, and calculating a second time difference signal corresponding to a second force magnetic coupling elastic wave according to the generation time of the second time stop signal and the excitation signal;
obtaining the position of a sedimentation magnetic ring according to the first time difference signal, the second time difference signal and the length of the waveguide tube;
and determining the displacement value of the corresponding roadbed layer according to the position of the settlement magnetic ring.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113566782A (en) * | 2021-07-26 | 2021-10-29 | 中国水利水电科学研究院 | Automatic monitoring device for layered settlement (lifting) of soil |
| CN114059518A (en) * | 2021-12-28 | 2022-02-18 | 长沙金码测控科技股份有限公司 | Integrated multi-parameter engineering monitoring device and matrix type monitoring system |
-
2020
- 2020-05-09 CN CN202010385734.1A patent/CN111412827A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113566782A (en) * | 2021-07-26 | 2021-10-29 | 中国水利水电科学研究院 | Automatic monitoring device for layered settlement (lifting) of soil |
| CN114059518A (en) * | 2021-12-28 | 2022-02-18 | 长沙金码测控科技股份有限公司 | Integrated multi-parameter engineering monitoring device and matrix type monitoring system |
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