CN209840951U - Low-frequency wave transmitting device and wireless displacement sensing device formed by same - Google Patents
Low-frequency wave transmitting device and wireless displacement sensing device formed by same Download PDFInfo
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- CN209840951U CN209840951U CN201920568623.7U CN201920568623U CN209840951U CN 209840951 U CN209840951 U CN 209840951U CN 201920568623 U CN201920568623 U CN 201920568623U CN 209840951 U CN209840951 U CN 209840951U
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Abstract
The utility model discloses a low frequency wave emitter, including low frequency wave transmitter and attitude control device, attitude control device includes that attitude control casing and high density are heavy liquid, the low frequency wave transmitter sets up in attitude control casing inner chamber to float in high density is heavy liquid, and disclose the wireless displacement sensing device who uses this low frequency wave emitter, including this low frequency wave emitter and electromagnetic wave receiver, electromagnetic wave receiver comprises receiving terminal space quadrature coil and voltage measurement device, and electromagnetic wave receiver receives the electromagnetic wave signal of low frequency wave transmitter transmission and converts voltage to obtain the position change low frequency wave emitter between low frequency wave transmitter and the electromagnetic wave receiver. The utility model provides a pair of wireless displacement sensing device for the monitoring is buried underground in the soil body or the object displacement variation of submergence in aqueous, its is rational in infrastructure, has solved the easy problem that is blockked by great barrier of electromagnetic wave, has improved the precision of object displacement monitoring.
Description
Technical Field
The utility model belongs to the technical field of geological disasters monitors, a low frequency wave emitter and wireless displacement sensing device who constitutes thereof is related to.
Background
At present, real-time monitoring of a slope is an important means for guaranteeing safe production, and landslide displacement monitoring is always the basis and the basis for landslide prevention and control. The real-time monitoring of the landslide can not only provide displacement and movement of the landslide, but also contribute to stability evaluation of the landslide and achieve the purposes of prediction and early warning.
The most common wired monitoring device is a foundation extensometer, which is based on the principle that a data transmission line is arranged between a reference point and a moving point, and displacement of a landslide body is monitored by measuring displacement of an input end. Other wired monitoring devices are in principle consistent with ground-based extensometers. The phenomena of collapse, debris flow and the like often occur due to unstable slope bodies or argillization on the surface layer, so that the conventional wired monitoring instrument is buried in debris and cannot acquire data of a monitored target; or the target cannot be monitored due to water immersion. In addition, some landslides rush into the downstream riverbed, or due to flood, the monitoring instrument line is in fault or the instrument is submerged by water, and monitoring data cannot be obtained.
In order to avoid the limitation of wired monitoring equipment, a non-contact measuring instrument is mostly adopted to monitor the displacement of a landslide body at present, the current non-contact measuring instrument mainly comprises a laser range finder, a high-frequency electromagnetic wave range finder and the like, and the principle is to obtain the propagation time of light or high-frequency electromagnetic wave between a reference point and a monitoring point to convert the distance. However, under some conditions, such as in the soil, in water, and in dense vegetation, optical signals and high-frequency electromagnetic wave signals are reflected and attenuated, and thus cannot be measured. The current non-contact measuring instrument use conditions still have great drawbacks.
Aiming at the defects of wired monitoring equipment and laser and high-frequency electromagnetic wave monitoring equipment, the wireless displacement sensing device is provided.
SUMMERY OF THE UTILITY MODEL
The utility model aims at the above-mentioned technical problem, the wireless displacement sensing device that provides is arranged in the monitoring to bury underground in the soil body or the object displacement variation of submergence in aqueous, it is rational in infrastructure, it is buried in the mud stone to have solved the wired monitoring instrument of conventionality, or by the water logging, or by some landslides or flood wash into low reaches riverbed and lead to the monitoring instrument circuit to break down, can't acquire the data of monitoring target, non-contact measuring instrument's light signal and high frequency electromagnetic wave signal take place the reflection, decay, easily blockked by great barrier, and can't carry out the technical problem of accurate measurement, the precision of object displacement monitoring has been improved.
In order to solve the technical problem, the utility model provides a low frequency wave emitter, including low frequency wave emitter and attitude control device, attitude control device includes that attitude control casing and high density are heavy liquid, the low frequency wave emitter sets up in attitude control casing inner chamber to suspend in high density is heavy liquid.
In some embodiments, the low-frequency wave transmitter includes an alternating current supply device and a transmitting-side spatial quadrature coil, the alternating current supply device being electrically connected to the transmitting-side spatial quadrature coil.
In some embodiments, the transmitting end space orthogonal coil is a coil in three orthogonal directions of a three-dimensional space, and at least one of the three orthogonal directions of the coil is arranged to be in a vertical direction relative to the surface of the heavy liquid with high density.
In some embodiments, the attitude control housing is cylindrical or spherical and the high-density heavy liquid is bromoform, diiodomethane or creosote.
In some embodiments, the attitude control housing is a thin-walled cemented carbide. This is because the posture control case is made of a thin-walled case in order to reduce the influence of the case thickness on the electromagnetic wave attenuation as much as possible, and the hardness of the alloy is generally high, and the case breakage probability due to the thin wall thickness can be reduced by selecting the posture control case from a hard alloy.
The utility model also provides an adopt above-mentioned low-frequency wave emitter's wireless displacement sensing device, including above-mentioned low-frequency wave emitter and electromagnetic wave receiver, low-frequency wave emitter electromagnetic wave receiver comprises receiving terminal space quadrature coil and voltage measurement device, and electromagnetic wave receiver receives the electromagnetic wave signal of low-frequency wave emitter transmission and converts voltage to obtain the position change between low-frequency wave emitter and the electromagnetic wave receiver.
In some embodiments, the low frequency wave transmitter transmits a low frequency wave of a fixed peak, frequency.
In some embodiments, the frequency of the low frequency waves emitted by the low frequency wave emitter is less than or equal to 1 kHz.
The utility model discloses beneficial effect:
the utility model provides a low frequency wave emitter and wireless displacement sensing device who constitutes thereof for the monitoring is buried underground in the soil body or the submerged object displacement variation in aqueous.
1. The problem that electromagnetic waves are easily blocked by a large obstacle is solved, and the precision of object displacement monitoring is improved;
2. the low-frequency wave transmitter is reasonable in structure, the attitude control device comprises an attitude control shell and high-density heavy liquid, the low-frequency wave transmitter is arranged in an inner cavity of the attitude control shell and is suspended in the high-density heavy liquid, at least one of the coils in the three orthogonal directions is located in the vertical direction, at least one measurable quantity of the three excitation coils of the low-frequency wave transmitter is guaranteed, the low-frequency wave transmitter can be buried in a soil body or immersed in water, and the low-frequency wave transmitter is conveniently used for monitoring a side slope and debris flow.
Drawings
The above advantages of the present invention will become more apparent and more readily appreciated from the detailed description taken in conjunction with the following drawings, which are given by way of illustration only and do not limit the present invention, and in which:
fig. 1 is a schematic diagram of a wireless displacement sensing device according to the present invention;
FIG. 2 is a block diagram of a low frequency wave transmitter according to the present invention;
FIG. 3 is a block diagram of an electromagnetic wave receiver according to the present invention;
FIG. 4 is a schematic structural diagram of a low frequency wave transmitter according to the present invention;
fig. 5 is a schematic structural diagram of an electromagnetic wave receiver according to the present invention.
In the drawings, the reference numerals denote the following components:
10. a low frequency wave transmitter; 11. an alternating current supply device; 12. a transmit end spatial quadrature coil; 13. an attitude control housing; 20. an electromagnetic wave receiver; 21. receiving end space orthogonal coils; 30. high-density heavy liquid.
Detailed Description
The present invention will be described in detail with reference to the following embodiments and accompanying drawings.
The embodiments described herein are specific embodiments of the present invention, and are intended to be illustrative of the concepts of the present invention, which are intended to be illustrative and exemplary, and should not be construed as limiting the scope of the embodiments of the present invention. In addition to the embodiments described herein, those skilled in the art will be able to employ other technical solutions which are obvious based on the disclosure of the claims and the specification of the present application, and these technical solutions include technical solutions which make any obvious replacement or modification for the embodiments described herein.
The drawings in the present specification are schematic views to assist in explaining the concept of the present invention, and schematically show the shapes of the respective portions and the mutual relationships thereof. It should be noted that for the sake of clarity in showing the structures of the various components of the embodiments of the present invention, the drawings are not drawn to the same scale. Like reference numerals are used to denote like parts.
The structure of a wireless displacement sensing device according to the present application is schematically illustrated in fig. 1 and 5, the device comprises a low-frequency wave emitter 10 and an attitude control device, wherein the attitude control device comprises an attitude control shell 13 and high-density heavy liquid 30, the low-frequency wave emitter 10 is arranged in the inner cavity of the attitude control shell 13, and suspended in a heavy high-density liquid 30, the low-frequency wave transmitter 10 includes an alternating current power supply 11 and a transmitting-side space orthogonal coil 12, the alternating current supply means 11 and the low-frequency wave transmitter 10 formed of the transmitting-end space orthogonal coil 12 are disposed inside the attitude control housing 13, the electromagnetic wave receiver 20 is composed of a receiving end space orthogonal coil 21 and a voltage measuring device 22, and the electromagnetic wave receiver 20 receives the electromagnetic wave signal transmitted by the low frequency wave transmitter 10 and converts the electromagnetic wave signal into a voltage to obtain the position change between the low frequency wave transmitter 10 and the electromagnetic wave receiver 20.
The utility model discloses in, attitude control casing 13 is drum or spherical casing, and its inside is provided with high density heavy liquid 30, and high density heavy liquid can adopt bromine imitative, diiodomethane or gram to be listed as the strange liquid as shown in fig. 4, low frequency wave transmitter 10 that alternating current supply device 11 and transmitting terminal space quadrature coil 12 formed sets up the inside at attitude control casing 13. The transmitting end space orthogonal coil 12 is a coil in three orthogonal directions of a three-dimensional space, and at least one of the coils in the three orthogonal directions is in a vertical direction, so that at least one of three excitation coils of the low-frequency wave transmitter can be measured. It can be understood that the low frequency wave has good penetration in the metal medium, and the attitude control housing is preferably made of thin-walled cemented carbide material such as thin-walled aluminum alloy or thin-walled titanium alloy in order to reduce the influence of the thickness of the housing on the attenuation of the electromagnetic wave as much as possible, and the hardness of the alloy is generally high, and the selection of the material of the attitude control housing as the cemented carbide can reduce the possibility of the damage of the housing due to the thin wall thickness, and the high-density heavy liquid 30 is injected into the attitude control housing 13, so that the low frequency wave transmitter 10 formed by the alternating current supply device 11 and the transmitting end space orthogonal coil 12 is suspended in the high-density heavy liquid 30 to ensure that at least one of the three orthogonal coils is kept vertically upward, and of course the low frequency wave transmitter 10 also includes a sealed housing so as to be suspended in the high-density heavy liquid, the sealing shell also adopts metal materials. It should be noted that any device that floats any sensor in the high-density heavy liquid 30 in any attitude control housing 13 and keeps the low-frequency wave transmitter 10 in a fixed direction can be used in the technical solution of the present application.
The alternating current supply device 11 is connected to the transmitting-end space orthogonal coil 12 to supply alternating current and generate electromagnetic waves, as shown in fig. 2. The receiving end space orthogonal coil 21 converts the electromagnetic wave signal into an electric signal, and the voltage measuring device 22 measures the change of the electromagnetic wave received by the electromagnetic wave receiver 20 corresponding to the electric signal to obtain the position change between the low frequency wave transmitter 10 and the electromagnetic wave receiver 20. In some embodiments, the low frequency wave transmitter 10 transmits low frequency waves of a fixed peak, frequency. Specifically, the frequency of the low-frequency wave emitted by the low-frequency wave emitter 10 is 1kHz or less.
The electromagnetic wave receiver 20 calculates a distance between the low frequency wave transmission 10 and the electromagnetic wave receiver 20 by converting the received electromagnetic wave signal into an electrical signal. The calculation principle is as follows:
s1, the low-frequency waves have good penetrability in metal media, and the posture control shell 13 can be made of thin-wall hard alloy materials; high-density heavy liquid is injected into the attitude control device 13, and a low-frequency wave transmitter 10 formed by an alternating current supply device 11 and a transmitting end space orthogonal coil 12 is suspended in the high-density heavy liquid, so that at least one of the three orthogonal coils is ensured to keep vertical upward.
S2 shows that the low-frequency wave transmitter 10 has three coil directions as base vector directionsThe electromagnetic wave receiver 20 takes three coil directions as base vector directions to form a three-dimensional rectangular coordinate systemThe representations form a three-dimensional rectangular coordinate system in whichAndmay not be the same coordinate system but at the same time follow the right-hand rule. Phi is aI'IThe component of the poynting vector of the electromagnetic wave transmitted by the coil in the I direction in the I' direction is represented by the following expression and expansion formula:
s3, the electromagnetic wave itself has energy, the electromagnetic wave receiver 20 converts the electromagnetic wave signal into electrical signal, the process follows the law of conservation of energy, the electromagnetic energy is converted into joule heat energy, the magnitude of poynting vector is proportional to the square of the induced voltage, the current density of the electromagnetic wave is proportional to the square of the voltage, and the voltage calculation formula is as follows:
eU 2＝eUX 2+eUY 2+eUZ 2
eV 2＝eVX 2+eVY 2+eVZ 2
eW 2＝eWX 2+eWY 2+eWZ 2
E2＝eU 2+eV 2+eW 2＝eUX 2+eUY 2+eUZ 2+eVX 2+eVY 2+eVZ 2+eWX 2+eWY 2+eWZ 2
in the formula, eIReceiving the induced voltage of the coil in the direction I for the electromagnetic wave; e.g. of the typeI'IThe voltage generated by the electromagnetic wave signal transmitted by the low-frequency wave transmitter I direction coil is induced to the electromagnetic wave receiver I' direction coil.
S4, the magnitude of the voltage E is inversely proportional to the transmission distance r to the third power. The distance between the transmitter and the receiver is known as r0At a time voltage of E0The distance between the low-frequency wave transmitter and the electromagnetic wave receiver can be determined by determining the voltage of the electromagnetic wave receiverFrom, the calculation is as follows:
the application solves the problem that the electromagnetic wave is easily blocked by a large barrier; meanwhile, the electromagnetic wave receiver converts electromagnetic wave signals into electric signals, the attenuation degree of the electromagnetic waves is represented in a voltage mode, the transmission distance of the electromagnetic waves is convenient to calculate, and powerful technical support is provided for more accurately and visually monitoring displacement changes of the landslide body and the moving condition of objects in the ground water.
Compare in prior art's shortcoming and not enough, the utility model provides a pair of wireless displacement sensing device for the monitoring is buried underground in the soil body or the submerged object displacement variable quantity in aqueous, its is rational in infrastructure, has solved the easy problem that is blockked by great barrier of electromagnetic wave, has improved the precision of object displacement monitoring, has better application and popularization value.
The present invention is not limited to the above embodiments, and any person can obtain other products in various forms without departing from the scope of the present invention, but any change in shape or structure is included in the technical solution that is the same as or similar to the present invention.
Claims (11)
1. The low-frequency wave transmitting device is characterized by comprising a low-frequency wave transmitter and an attitude control device, wherein the attitude control device comprises an attitude control shell and high-density heavy liquid, and the low-frequency wave transmitter is arranged in an inner cavity of the attitude control shell and is suspended in the high-density heavy liquid.
2. The low-frequency wave transmission device according to claim 1, wherein the low-frequency wave transmitter includes an alternating current supply device and a transmitting-side spatial quadrature coil, the alternating current supply device being electrically connected to the transmitting-side spatial quadrature coil.
3. The low-frequency wave transmission device according to claim 2, wherein said transmitting-side spatial orthogonal coils are coils in three orthogonal directions in three dimensions, the coils are left-handed or right-handed, and at least one of the coils in three orthogonal directions is disposed in a vertical direction with respect to a surface of the high-density heavy liquid.
4. The low-frequency wave transmission device according to claim 1, wherein the attitude control housing is cylindrical or spherical, and the high-density heavy liquid is bromoform, diiodomethane, or cremophor liquid.
5. The low-frequency wave transmission device according to claim 2, wherein the attitude control housing is cylindrical or spherical, and the high-density heavy liquid is bromoform, diiodomethane, or cremophor liquid.
6. The low-frequency wave transmission device according to claim 3, wherein the attitude control housing is cylindrical or spherical, and the high-density heavy liquid is bromoform, diiodomethane, or cremophor liquid.
7. The low frequency wave transmission device according to any one of the preceding claims, wherein the attitude control housing is a thin-walled cemented carbide.
8. A wireless displacement sensing device, comprising the low frequency wave transmitting device and the electromagnetic wave receiver of any one of the preceding claims, wherein the low frequency wave transmitting device and the electromagnetic wave receiver are composed of a receiving end space orthogonal coil and a voltage measuring device, and the electromagnetic wave receiver receives the electromagnetic wave signal transmitted by the low frequency wave transmitter and converts the electromagnetic wave signal into voltage so as to obtain the position change between the low frequency wave transmitter and the electromagnetic wave receiver.
9. The wireless displacement sensing device of claim 8, wherein the receiving end space orthogonal coils are coils in three orthogonal directions of a three-dimensional space, and the coils are left-handed or right-handed at the same time.
10. A wireless displacement sensing device according to claim 8 or 9 wherein the low frequency wave emitter emits a low frequency wave of fixed peak, frequency.
11. The wireless displacement sensing device according to claim 8 or 9, wherein the frequency of the low-frequency waves emitted by the low-frequency wave emitter is 1kHz or less.
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| CN110118522A (en) * | 2019-04-24 | 2019-08-13 | 北京北科安地科技发展有限公司 | A kind of Wireless movement sensing device of low frequency wave transmitting device and its composition |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN110118522A (en) * | 2019-04-24 | 2019-08-13 | 北京北科安地科技发展有限公司 | A kind of Wireless movement sensing device of low frequency wave transmitting device and its composition |
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Effective date of registration: 20200311 Address after: 100083 room 02, floor 18, block a, kedatiangong building, No. 30, Xueyuan Road, Haidian District, Beijing Patentee after: Beijing tianxiatu Technology Co., Ltd Address before: 100083 West six, room 603, room 30, Xueyuan Road, Haidian District, Beijing Patentee before: Beijing Beike Andi Technology Development Co., Ltd. |
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Effective date of registration: 20201201 Address after: Room 03, 18 / F, block a, science and Technology University Tiangong building, 30 Xueyuan Road, Haidian District, Beijing 100083 Patentee after: BEIJING PEACEMAP DATA TECHNOLOGY Co.,Ltd. Address before: 100083 room 02, floor 18, block a, kedatiangong building, No. 30, Xueyuan Road, Haidian District, Beijing Patentee before: Beijing tianxiatu Technology Co.,Ltd. |
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