A magnetic resistance electric sedimentation instrument
Through the magnetoresistive electrical sedimentation instrument, the electrical signal of Hall magnetic induction element is detected by using magnetic ring displacement changes, which solves the problem of inefficient manual operation in the prior art, and realizes high-precision and automated settlement monitoring, which is suitable for a variety of foundation settlement. Scene.
Patent Information
- Application Number
- CN201810266457.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2018-03-28
- Publication Date
- 2024-12-27
- Estimated Expiration
- 2038-03-28
AI Technical Summary
The existing electromagnetic sedimentation instruments require manual operation when monitoring soft soil foundation settlement, with low measurement accuracy and low automation, and cannot monitor settlement displacement or settlement rate in real time.
The magnetic reluctance electrical sedimentation meter is used to change the resistance value of the Hall magnetic induction element by changing the displacement of the magnetic ring, thereby realizing the change of the coil inductance, detecting and outputting the electrical signal through the electronic control unit, realizing non-contact continuous measurement.
It realizes high-precision and automated settlement monitoring, can output a variety of signals in real time, is simple to install, and is suitable for long-term measurement of settlement of earth and rock dams and foundations, reducing labor costs.
Smart Images
Figure CN108195349B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the field of civil engineering soil foundation settlement monitoring, in particular to a magnetic resistance electric settlement instrument. Background Art
[0002] At present, electromagnetic settlement meters are usually used to monitor the settlement of soft soil foundations in dam construction or military and civilian construction projects. The working method of the electromagnetic settlement meter is to pre-embed a settlement tube made of PVC material in the soft soil foundation to be measured, and to cover the settlement magnetic rings in sections outside the settlement tubes. The settlement magnetic rings settle with the measured soil layer. A magnetic induction sensor is set at one end of the tape measure and connected to a receiver at the other end of the tape measure through a signal line attached to the tape measure. There is a buzzer in the receiver and the tape measure is marked with scales. The tape measure with a side head is manually placed into the PVC conduit and the probe is slowly moved downward. When the probe reaches the buried position of the magnetic ring in the soil layer, the buzzer of the receiver will beep. At this time, the depth size of the tape measure at the pipe mouth is manually read, and the measurement is done bit by bit. This measurement method requires manual operation, reading, and recording of the measured values throughout the process. The measurement accuracy is not high, the degree of automation is low, and it consumes manpower. It cannot monitor the settlement displacement or settlement rate in real time. Summary of the invention
[0003] In order to solve the above technical problems, the present invention provides a magnetoresistive electric sedimentation meter which realizes measurement based on the change of the self-inductance coefficient of the self-inductance coil inside the magnetoresistive sensor caused by the change of the displacement of the magnetic ring, thereby causing the change of the coil inductance.
[0004] A magnetic resistance electric sedimentation instrument comprises an outer protective tube, wherein an electronic compartment, a measuring rod and a cable are arranged inside the outer protective tube, a positioning ring is sleeved on one end of the measuring rod, and a control ring is sleeved on the other end, the positioning ring and the control ring are fixed to the inner wall of the outer protective tube by positioning screws, the electronic compartment is fixedly installed on the upper end surface of the positioning ring, an electric control unit is arranged inside, a magnetic induction element is arranged inside the measuring rod, and is connected to the electric control unit, an anchor plate and a vernier magnetic ring are sleeved on the outer ring of the outer protective tube, the anchor plate is fixedly connected to the vernier magnetic ring by bolts and nuts, an upper pressure cover is arranged on the top of the outer protective tube, and a pipe head plug is arranged on the bottom, the cable passes through the upper pressure cover and the electronic compartment and is connected to the electric control unit.
[0005] In the above solution, the magnetic induction element is a Hall magnetic induction element.
[0006] In the above solution, the measuring rod is made of non-magnetic stainless steel.
[0007] In the above solution, the electronic compartment is made of stainless steel and the interface is sealed with an O-ring.
[0008] Compared with the prior art, the invention has the following beneficial effects: the magnetoresistance electric settlement meter adopts linear measurement, absolute position output, non-contact continuous measurement, no need for recalibration and regular maintenance, multiple output signal options, current 4-20mA, RS485, simple and convenient installation. The magnetoresistance electric settlement meter is suitable for long-term measurement of layered settlement of earth-rock dams and settlement of embankments and foundations during excavation and loading. It can measure single-point settlement and can also be used for multi-point layered settlement measurement. BRIEF DESCRIPTION OF THE DRAWINGS
[0009] Figure 1 It is a structural schematic diagram of the magnetic resistance electric sedimentation instrument of the present invention;
[0010] Explanation of the reference numerals: 1. Electronic compartment, 2. Measuring rod, 3. Cable, 4. Positioning ring, 5. Anchor plate, 6. Vernier magnetic ring, 7. Control ring, 8. Outer protective tube, 9. Pipe head plug, 10. Upper pressure cover. DETAILED DESCRIPTION
[0011] The technical solution of the present invention is further described in detail below in conjunction with the accompanying drawings.
[0012] like Figure 1 As shown, a magnetic resistance electric sedimentation instrument comprises an outer protective tube 8, an electronic compartment 1, a measuring rod 2 and a cable 3 are arranged inside the outer protective tube 8, a positioning ring 4 is set on one end of the measuring rod 2, and a control ring 7 is set on the other end, the positioning ring 4 and the control ring 7 are fixed on the inner wall of the outer protective tube 8 by positioning screws, the electronic compartment 1 is fixedly installed on the upper end surface of the positioning ring 4, and an electric control unit is arranged inside, a magnetic induction element is arranged inside the measuring rod 2, which is welded on a flexible circuit board and connected to the electric control unit, the outer ring of the outer protective tube 8 is set with an anchor plate 5 and a vernier magnetic ring 6, the anchor plate 5 is fixedly connected to the vernier magnetic ring 6 by bolts and nuts, an upper pressure cover 10 is arranged on the top of the outer protective tube 8, and a pipe head plug 9 is arranged on the bottom, and the cable 3 passes through the upper pressure cover 10 and the electronic compartment 1 and is connected to the electric control unit. The measuring rod 2 is made of non-magnetic stainless steel with good waterproof performance, and different lengths of the measuring rod 2 can be customized according to the user's measurement range requirements. The electronic compartment 1 is used to protect the electronic control unit and the cable 3. It is made of stainless steel, and each interface is sealed with an O-ring to achieve a waterproof and moisture-proof effect.
[0013] The magnetoresistance electric sedimentation meter is an instrument that uses the physical phenomenon that the change in the displacement of the magnetic ring causes the change in the resistance of the Hall magnetic induction element, thereby causing the change in the inductance of the coil to achieve measurement. The Hall magnetic induction element is connected in series with the resistor to form a group of circuits, and several groups of circuits are connected in parallel and then connected to the electronic control unit. When the cursor magnetic ring 6 moves with the change of the measured medium, the Hall magnetic induction element is attracted to connect the resistor and generate a corresponding electrical signal with the electronic control unit. Each resistor connected to the Hall magnetic induction element has a different resistance value, thereby generating different electrical signals. The electronic control unit in the electronic compartment 1 detects and analyzes the electrical signal, and transmits the potential difference to other electronic devices through the cable 3 in the form of a 4-20mA two-wire current signal or an RS485 signal.
[0014] The specific implementation methods described above further illustrate the objectives, technical solutions and beneficial effects of the present invention in detail. It should be understood that the above description is only a specific implementation method of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.
Claims
1. A magnetic resistance electric sedimentation instrument, comprising an outer protective tube (8), characterized in that: An electronic compartment (1), a measuring rod (2) and a cable (3) are arranged inside the outer protective tube (8); a positioning ring (4) is sleeved on one end of the measuring rod (2) and a control ring (7) is sleeved on the other end; the positioning ring (4) and the control ring (7) are fixed to the inner wall of the outer protective tube (8) by positioning screws; the electronic compartment (1) is fixedly mounted on the upper end surface of the positioning ring (4) and an electric control unit is arranged inside; a magnetic sensing element is arranged inside the measuring rod (2) and is connected to the electric control unit; an anchor plate (5) and a vernier magnetic ring (6) are sleeved on the outer ring of the outer protective tube (8); the anchor plate (5) is fixedly connected to the vernier magnetic ring (6) by bolts and nuts; an upper pressure cover (10) is arranged on the top of the outer protective tube (8) and a pipe head plug (9) is arranged on the bottom; the cable (3) passes through the upper pressure cover (10) and the electronic compartment (1) and is connected to the electric control unit; The magnetic induction element is a Hall magnetic induction element, and the Hall magnetic induction element is connected in series with a resistor to form a group of circuits, and several groups of circuits are connected in parallel and then connected to the electronic control unit; The magnetic resistance electric sedimentation instrument uses the change of the displacement of the magnetic ring to cause the resistance value of the Hall magnetic induction element to change, thereby causing the inductance of the coil to change. The Hall magnetic induction element and the resistor are connected in series to form a group of circuits. Several groups of circuits are connected in parallel and then connected to the electronic control unit. When the cursor magnetic ring (6) moves with the change of the measured medium, the Hall magnetic induction element is attracted to connect the resistor, and a corresponding electrical signal is generated with the electronic control unit. The resistance value of each resistor connected to the Hall magnetic induction element is different, thereby generating different electrical signals. The electronic control unit in the electronic compartment (1) detects and analyzes the electrical signal, and transmits the potential difference to other electronic equipment in the form of a 4-20mA two-wire current signal or an RS485 signal through a cable (3).
2. The magnetic resistance electric sedimentation instrument as claimed in claim 1, characterized in that: The measuring rod (2) is made of non-magnetic stainless steel.
3. The magnetoresistance electric sedimentation instrument as claimed in claim 1, characterized in that: The electronic compartment (1) is made of stainless steel and the interface is sealed with an O-ring.