CN102135457A - Method for extracting sensing signal of smart cement-based material - Google Patents
Method for extracting sensing signal of smart cement-based material Download PDFInfo
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- CN102135457A CN102135457A CN 201110042864 CN201110042864A CN102135457A CN 102135457 A CN102135457 A CN 102135457A CN 201110042864 CN201110042864 CN 201110042864 CN 201110042864 A CN201110042864 A CN 201110042864A CN 102135457 A CN102135457 A CN 102135457A
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- 239000004568 cement Substances 0.000 title claims abstract description 89
- 239000000463 material Substances 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 49
- 230000036626 alertness Effects 0.000 claims description 64
- 230000007935 neutral effect Effects 0.000 claims description 13
- 230000011664 signaling Effects 0.000 claims description 4
- 230000008569 process Effects 0.000 abstract description 10
- 230000008859 change Effects 0.000 abstract description 2
- 238000007796 conventional method Methods 0.000 abstract 1
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 12
- 239000002041 carbon nanotube Substances 0.000 description 12
- 229910021393 carbon nanotube Inorganic materials 0.000 description 12
- 230000002441 reversible effect Effects 0.000 description 10
- 238000002386 leaching Methods 0.000 description 9
- 238000010586 diagram Methods 0.000 description 7
- PXHVJJICTQNCMI-UHFFFAOYSA-N Nickel Chemical compound [Ni] PXHVJJICTQNCMI-UHFFFAOYSA-N 0.000 description 6
- 238000000605 extraction Methods 0.000 description 6
- 230000010287 polarization Effects 0.000 description 4
- 239000004575 stone Substances 0.000 description 4
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 4
- 239000011231 conductive filler Substances 0.000 description 2
- 150000002500 ions Chemical class 0.000 description 2
- 239000011159 matrix material Substances 0.000 description 2
- 238000005259 measurement Methods 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 208000037656 Respiratory Sounds Diseases 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000004364 calculation method Methods 0.000 description 1
- 230000006735 deficit Effects 0.000 description 1
- 238000001514 detection method Methods 0.000 description 1
- 230000005684 electric field Effects 0.000 description 1
- 230000036541 health Effects 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 230000009467 reduction Effects 0.000 description 1
- 230000001360 synchronised effect Effects 0.000 description 1
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Abstract
The invention relates to a method for extracting a sensing signal of a smart cement-based material. By the method, the problem that the conventional method for acquiring the sensing signal of the smart cement-based material is complicated and difficult to process. The method comprises the following steps of: 1, exerting a direct current on a stress part for exerting a stress of the smart cement-based material, wherein the direction of the exerted stress is the same as the direction of the current; 2, acquiring an original sensing signal of the stress part according to the change of a current value; and 3, removing a linearly increased tendency value from the original sensing signal so as to extract the sensing signal of the smart cement-based material. The method is simple and easy, and can be applied to the field of signal processing.
Description
Technical field
The present invention relates to a kind of extracting method of perceptual signal of alertness cement-based material.
Background technology
Alertness cement-based material is when bearing external force, and the resistance of himself can take place clocklike to change, thereby can monitor self stress, strain, crackle or degree of impairment.Thereby have a good application prospect at aspects such as monitoring structural health conditions, traffic detection and Military Vigilances.Alertness cement-based material mainly obtains by the admixture conductive filler, its conduction is come together to bear by cement-based material matrix and conductive filler, because there is a large amount of ions in cement-based material matrix inside, these ions can move under electric field action, thereby produce polarization phenomena.Polarization can cause alertness cement-based material perceptual signal instability, can eliminate the influence of polarization to perceptual signal to a certain extent by the method for alternating-current measurement, but the alternating-current measurement more complicated, and synchronous signal is difficult to gather and handle.
Summary of the invention
The present invention will solve the complicated and reluctant problem of the acquisition method of the perceptual signal of present alertness cement-based material, and a kind of extracting method of perceptual signal of alertness cement-based material is provided.The concrete steps of this method are:
Step 1: the part of the force of exerting pressure at alertness cement-based material applies DC current, and the direction of exerting pressure is consistent with sense of current;
Step 2: the raw sensed signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that raw sensed signal neutral line increases, can extract the perceptual signal of alertness cement-based material.
The raw sensed signal is the linear increase of meeting under the influence of polarization, increases item by the linearity of removing the raw sensed signal, can obtain perceptual signal.Perceptual signal of the present invention is voltage signal or resistance signal.
Method of the present invention is extracted under external force perceptual signal by the direct current resistance signal being carried out aftertreatment.This method has simple characteristics, and the perceptual signal that can be used in alertness cement-based material, sensor and the intelligence structure thereof is handled.
Description of drawings
Fig. 1 is the synoptic diagram of the trend amount computing method of embodiment five neutral lines increase; Fig. 2 is the corresponding relation synoptic diagram of the perceptual signal of the raw sensed signal of the suffered stress of alertness cement-based material, acquisition in the embodiment nine and extraction; Fig. 3 is the corresponding relation synoptic diagram of the perceptual signal of the raw sensed signal of the suffered stress of alertness cement-based material, acquisition in the embodiment ten and extraction; Fig. 4 is the corresponding relation synoptic diagram of the perceptual signal of the raw sensed signal of the suffered stress of alertness cement-based material, acquisition in the embodiment 11 and extraction; Fig. 5 is the corresponding relation synoptic diagram of the perceptual signal of the raw sensed signal of the suffered stress of alertness cement-based material, acquisition in the embodiment 12 and extraction; Fig. 6 is the corresponding relation synoptic diagram of the perceptual signal of the raw sensed signal of the suffered stress of alertness cement-based material, acquisition in the embodiment 13 and extraction; Fig. 7 is the corresponding relation synoptic diagram of the perceptual signal of the raw sensed signal of the suffered stress of alertness cement-based material, acquisition in the embodiment 14 and extraction.
Embodiment
Embodiment one: the concrete steps of the extracting method of the perceptual signal of a kind of alertness cement-based material of present embodiment are:
Step 1: the part of the force of exerting pressure at alertness cement-based material applies DC current, and the direction of exerting pressure is consistent with sense of current;
Step 2: the raw sensed signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that raw sensed signal neutral line increases, can extract the perceptual signal of alertness cement-based material.
The speed that applies of the described pressure of present embodiment step 1 is arbitrary value, and pressure limit is as long as all can in the strength range that can bear of alertness cement-based material.
Embodiment two: present embodiment is that the step 1 in the extracting method of the perceptual signal of embodiment one described a kind of alertness cement-based material is described further, and the range of current of the described DC current of step 1 is 0.1～1 peace.
Embodiment three: present embodiment is that the extracting method to the perceptual signal of embodiment one described a kind of alertness cement-based material is described further, and described perceptual signal is a voltage signal.
Embodiment four: present embodiment is that the extracting method to the perceptual signal of embodiment one described a kind of alertness cement-based material is described further, and described perceptual signal is a resistance signal.
Embodiment five: present embodiment is that the extracting method to the perceptual signal of embodiment one described a kind of alertness cement-based material is described further, as shown in Figure 1, the trend amount that linearity in the step 3 increases is calculated according to y=kx, described k=Δ y/ Δ x, wherein x is to be the projection of raw sensed signal on time shaft with chronomere, y is the trend amount that the linearity of raw sensed signal in each position of x axle increases, Δ x is the difference of horizontal ordinate between raw sensed signal starting point and the raw sensed signaling destination point, and Δ y is the difference of ordinate between raw sensed signaling destination point and the raw sensed signal starting point.
In the coordinate system that present embodiment is set up, true origin is the starting point of raw sensed signal, also can be taken at other positions.If true origin is taken at other positions, its linear trend amount that increases is calculated according to corresponding mathematical algorithm.
Embodiment six: present embodiment is that the extracting method to the perceptual signal that adopts a kind of alertness cement-based material of the present invention carries out illustrating of perceptual signal leaching process:
Step 1: the part of the force of exerting pressure at alertness cement-based material applies DC current, and the mode of exerting pressure is for to be loaded into certain pressure with arbitrary speed, and being offloaded to pressure with arbitrary speed again is 0, and the direction of exerting pressure is consistent with sense of current;
Step 2: the primary voltage signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that primary voltage signal neutral line increases, can extract the voltage signal of alertness cement-based material.
Embodiment seven: present embodiment is that the extracting method to the perceptual signal that adopts a kind of alertness cement-based material of the present invention carries out illustrating of perceptual signal leaching process:
Step 1: the part of the force of exerting pressure at alertness cement-based material applies DC current, and the mode of exerting pressure is for to be loaded into certain pressure with arbitrary speed, and being offloaded to pressure with arbitrary speed again is 0, and the direction of exerting pressure is consistent with sense of current;
Step 2: the original resistance signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that original resistance signal neutral line increases, can extract the resistance signal of alertness cement-based material.
Embodiment eight: present embodiment is that the extracting method to the perceptual signal that adopts a kind of alertness cement-based material of the present invention carries out illustrating of perceptual signal leaching process:
Step 1: the part of the force of exerting pressure at alertness cement-based material applies DC current, the mode of exerting pressure is for to be loaded into certain pressure with arbitrary speed, being offloaded to pressure with arbitrary speed again is 0, and repeats repeatedly to load, and the direction of exerting pressure is consistent with sense of current;
Step 2: the primary voltage signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that primary voltage signal neutral line increases, can extract the voltage signal of alertness cement-based material.
Embodiment nine: present embodiment is that the extracting method to the perceptual signal that adopts a kind of alertness cement-based material of the present invention carries out illustrating of perceptual signal leaching process:
Step 1: apply 0.6 ampere DC current in the part of the force that alertness cement-based material is exerted pressure, the mode of exerting pressure is loaded into pressure 2.5 MPas for the speed with 0.10cm/min, speed with 0.10cm/min is offloaded to pressure 0 MPa then, and repeat repeatedly to load, the direction of exerting pressure is consistent with sense of current;
Step 2: the original resistance signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that original resistance signal neutral line increases, can extract the resistance signal of alertness cement-based material.
Alertness cement-based material in the present embodiment step 1 is alert and resourceful carbon nano-tube sand-cement slurry, is to be made by carbon nano-tube, cement, Sha Heshui, and the weight of carbon nano-tube is 1% of cement weight.
As shown in Figure 2, the perceptual signal and the pressure that extract by the method for present embodiment have good corresponding relation, increase with pressure, and what resistance was reversible reduces, and reduces the increase that resistance is reversible with pressure.
Embodiment ten: present embodiment is that the extracting method to the perceptual signal that adopts a kind of alertness cement-based material of the present invention carries out illustrating of perceptual signal leaching process:
Step 1: apply 0.8 ampere DC current in the part of the force that alertness cement-based material is exerted pressure, the mode of exerting pressure is loaded into pressure 10 MPas for the speed with 0.10cm/min, speed with 0.10cm/min is offloaded to pressure 0 MPa then, and repeat repeatedly to load, the direction of exerting pressure is consistent with sense of current;
Step 2: the original resistance signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that original resistance signal neutral line increases, can extract the resistance signal of alertness cement-based material.
Alertness cement-based material in the present embodiment step 1 is alert and resourceful carbon nano-tube sand-cement slurry, is to be made by carbon nano-tube, cement, Sha Heshui, and the weight of carbon nano-tube is 1% of cement weight.
As shown in Figure 3, the perceptual signal and the pressure that extract by the method for present embodiment have good corresponding relation, increase with pressure, and what resistance was reversible reduces, and reduces the increase that resistance is reversible with pressure.
Embodiment 11: present embodiment is that the extracting method to the perceptual signal that adopts a kind of alertness cement-based material of the present invention carries out illustrating of perceptual signal leaching process:
Step 1: apply 0.5 ampere DC current in the part of the force that alertness cement-based material is exerted pressure, the mode of exerting pressure is loaded into pressure 6 MPas for the speed with 0.10cm/min, speed with 0.10cm/min is offloaded to pressure 0 MPa then, and repeat repeatedly to load, the direction of exerting pressure is consistent with sense of current;
Step 2: the original resistance signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that original resistance signal neutral line increases, can extract the resistance signal of alertness cement-based material.
Alertness cement-based material in the present embodiment step 1 is alert and resourceful carbon nano-tube cement stone, is to be made by carbon nano-tube, cement and water, and the weight of carbon nano-tube is 0.1% of cement weight.
As shown in Figure 4, the perceptual signal and the pressure that extract by the method for present embodiment have good corresponding relation, increase with pressure, and what resistance was reversible reduces, and reduces the increase that resistance is reversible with pressure.
Embodiment 12: present embodiment is that the extracting method to the perceptual signal that adopts a kind of alertness cement-based material of the present invention carries out illustrating of perceptual signal leaching process:
Step 1: apply 0.1 ampere DC current in the part of the force that alertness cement-based material is exerted pressure, the mode of exerting pressure is for to be loaded into a stress level with random velocity, be offloaded to pressure 0 MPa with the speed identical then with loading velocity, and repeat repeatedly to load, the direction of exerting pressure is consistent with sense of current;
Step 2: the original resistance signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that original resistance signal neutral line increases, can extract the resistance signal of alertness cement-based material.
Alertness cement-based material in the present embodiment step 1 is alert and resourceful carbon nano-tube cement stone, is to be made by carbon nano-tube, cement and water, and the weight of carbon nano-tube is 0.1% of cement weight.
As shown in Figure 5, the perceptual signal and the pressure that extract by the method for present embodiment have good corresponding relation, the reduction of resistance and the proportional relation of loading amplitude.
Embodiment 13: present embodiment is that the extracting method to the perceptual signal that adopts a kind of alertness cement-based material of the present invention carries out illustrating of perceptual signal leaching process:
Step 1: apply 0.6 ampere DC current in the part of the force that alertness cement-based material is exerted pressure, the mode of exerting pressure is loaded into pressure 2.5 MPas for the speed with 0.10cm/min, speed with 0.10cm/min is offloaded to pressure 0 MPa then, and repeat repeatedly to load, the direction of exerting pressure is consistent with sense of current;
Step 2: the original resistance signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that original resistance signal neutral line increases, can extract the resistance signal of alertness cement-based material.
Alertness cement-based material in the present embodiment step 1 is alert and resourceful nickel powder cement stone, is to be made by nickel powder, cement and water, and the weight of nickel powder is 2 times of cement weight.
As shown in Figure 6, the perceptual signal and the pressure that extract by the method for present embodiment have good corresponding relation, increase with pressure, and what resistance was reversible reduces, and reduces the increase that resistance is reversible with pressure.
Embodiment 14: present embodiment is that the extracting method to the perceptual signal that adopts a kind of alertness cement-based material of the present invention carries out illustrating of perceptual signal leaching process:
Step 1: apply 0.8 ampere DC current in the part of the force that alertness cement-based material is exerted pressure, the mode of exerting pressure is loaded into compressive stress 6 MPas for the speed with 0.10cm/min, speed with 0.10cm/min is offloaded to compressive stress 0 MPa then, and repeat repeatedly to load, the direction of exerting pressure is consistent with sense of current;
Step 2: the original resistance signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that original resistance signal neutral line increases, can extract the resistance signal of alertness cement-based material.
Alertness cement-based material in the present embodiment step 1 is alert and resourceful nickel powder cement stone, is to be made by nickel powder, cement and water, and the weight of nickel powder is 2 times of cement weight.
As shown in Figure 7, the perceptual signal and the pressure that extract by the method for present embodiment have good corresponding relation, increase with pressure, and what resistance was reversible reduces, and reduces the increase that resistance is reversible with pressure.
Claims (5)
1. the extracting method of the perceptual signal of an alertness cement-based material is characterized in that the concrete steps of this method are:
Step 1: the part of the force of exerting pressure at alertness cement-based material applies DC current, and the direction of exerting pressure is consistent with sense of current;
Step 2: the raw sensed signal that obtains the part of the force according to the variation of current value;
Step 3: remove the trend amount that raw sensed signal neutral line increases, can extract the perceptual signal of alertness cement-based material.
2. the extracting method of the perceptual signal of a kind of alertness cement-based material according to claim 1 is characterized in that, the range of current of the described DC current of step 1 is 0.1～1 peace.
3. the extracting method of the perceptual signal of a kind of alertness cement-based material according to claim 1 is characterized in that, described perceptual signal is a voltage signal.
4. the extracting method of the perceptual signal of a kind of alertness cement-based material according to claim 1 is characterized in that, described perceptual signal is a resistance signal.
5. the extracting method of the perceptual signal of a kind of alertness cement-based material according to claim 1, it is characterized in that, the trend amount that linearity in the step 3 increases is calculated according to y=kx, described k=Δ y/ Δ x, wherein x is to be the projection of raw sensed signal on time shaft with chronomere, y is the trend amount that the linearity of raw sensed signal in each position of x axle increases, Δ x is the difference of horizontal ordinate between raw sensed signal starting point and the raw sensed signaling destination point, and Δ y is the difference of ordinate between raw sensed signaling destination point and the raw sensed signal starting point.
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Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1111992A (en) * | 1997-06-23 | 1999-01-19 | Techno Japan:Kk | Cement based material to be solidified or hydraulic material of incineration ash in which harmful heavy metal is insolubilized |
| CN1451955A (en) * | 2003-05-22 | 2003-10-29 | 武汉理工大学 | High-sensitivity carbon fibre cement based resistance strain sensing system comprising temp. compensation |
| CN1818643A (en) * | 2006-03-20 | 2006-08-16 | 哈尔滨工业大学 | Pressure-sensitive performance testing method of pressure-sensitive cement-base materials |
| CN101121582A (en) * | 2007-07-06 | 2008-02-13 | 哈尔滨工业大学 | Pressure-sensitive cement-base composite material |
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Patent Citations (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH1111992A (en) * | 1997-06-23 | 1999-01-19 | Techno Japan:Kk | Cement based material to be solidified or hydraulic material of incineration ash in which harmful heavy metal is insolubilized |
| CN1451955A (en) * | 2003-05-22 | 2003-10-29 | 武汉理工大学 | High-sensitivity carbon fibre cement based resistance strain sensing system comprising temp. compensation |
| CN1818643A (en) * | 2006-03-20 | 2006-08-16 | 哈尔滨工业大学 | Pressure-sensitive performance testing method of pressure-sensitive cement-base materials |
| CN101121582A (en) * | 2007-07-06 | 2008-02-13 | 哈尔滨工业大学 | Pressure-sensitive cement-base composite material |
Non-Patent Citations (2)
| Title |
|---|
| 《仪表技术与传感器》 20051231 韩宝国等 碳纤维水泥基压敏传感器数据采集系统的设计 第56-58页 1-5 , 第7期 2 * |
| 《硅酸盐通报》 20041228 韩宝国等 纳米水泥石导电性与压敏性的试验研究 正文1.2.2节、图1 1-4 , 2 * |
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