CN104930991B - Displacement monitoring method and system for monitoring displacement based on carrier phase - Google Patents
Displacement monitoring method and system for monitoring displacement based on carrier phase Download PDFInfo
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- CN104930991B CN104930991B CN201510397279.6A CN201510397279A CN104930991B CN 104930991 B CN104930991 B CN 104930991B CN 201510397279 A CN201510397279 A CN 201510397279A CN 104930991 B CN104930991 B CN 104930991B
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 121
- 238000006073 displacement reaction Methods 0.000 title claims abstract description 71
- 238000000034 method Methods 0.000 title claims abstract description 20
- 239000000969 carrier Substances 0.000 claims description 10
- 238000010276 construction Methods 0.000 description 10
- 238000005259 measurement Methods 0.000 description 6
- 238000009435 building construction Methods 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 230000008569 process Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- DMBHHRLKUKUOEG-UHFFFAOYSA-N diphenylamine Chemical compound C=1C=CC=CC=1NC1=CC=CC=C1 DMBHHRLKUKUOEG-UHFFFAOYSA-N 0.000 description 2
- 230000006855 networking Effects 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
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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
- G01B15/00—Measuring arrangements characterised by the use of electromagnetic waves or particle radiation, e.g. by the use of microwaves, X-rays, gamma rays or electrons
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Abstract
The present invention provides a kind of displacement monitoring methods and system for monitoring displacement based on carrier phase.Displacement monitoring method includes：In datum mark to the carrier wave of monitoring point transmitting predetermined wavelength, wherein, the initial distance between datum mark and monitoring point preselects；Carrier wave is received, and measure the carrier phase of carrier wave in monitoring point；The complete cycle number of carrier wave according to received by calculating initial distance and predetermined wavelength, and shift value of the monitoring point relative to datum mark is calculated according to initial distance, predetermined wavelength, complete cycle number and carrier phase.By the above-mentioned means, the present invention can reduce the cost of displacement monitoring, while ensure higher monitoring accuracy.
Description
Technical Field
The invention relates to the technical field of displacement monitoring, in particular to a carrier phase-based displacement monitoring method and a carrier phase-based displacement monitoring system.
Background
In industries such as building construction, geological disasters, high-speed rail construction, subway construction and operation, displacement of a certain target is often monitored, and high-precision displacement monitoring becomes very important because the change of displacement relates to the problem of construction safety.
The existing displacement monitoring methods are generally three types, namely total station measurement, GPS measurement and laser ranging. The total station measurement is to select a reference point, measure the distance and the angle from a target to the reference point by using an instrument manually, and calculate the coordinates and the coordinate displacement of a monitoring point according to the angle and the distance. The GPS measurement is to measure the displacement of the monitoring point by adopting a GPS positioning mode, the method needs to use a GPS positioning system, the cost is high, and the GPS signal is unstable due to the limitation of the environmental conditions of the construction site, so the measurement precision is poor, the centimeter level can be reached, and the high-precision requirement of displacement monitoring can not be met. The laser ranging is to accurately measure the distance of a target by using laser, and although the method has high precision, the cost of the used laser equipment is high, so that the use of the laser equipment in the monitoring field is influenced.
Disclosure of Invention
The invention mainly solves the technical problem of providing a displacement monitoring method and a displacement monitoring system based on a carrier phase, which can reduce the cost of displacement monitoring and ensure higher monitoring precision.
In order to solve the technical problems, the invention adopts a technical scheme that: a displacement monitoring method based on carrier phase is provided, which comprises the following steps: transmitting a carrier wave with a preset wavelength to a monitoring point at a reference point, wherein the initial distance between the reference point and the monitoring point is selected in advance; receiving the carrier wave at the monitoring point, and measuring the carrier phase of the carrier wave; and calculating the whole cycle number of the received carrier wave according to the initial distance and the preset wavelength, and calculating the displacement value of the monitoring point relative to the reference point according to the initial distance, the preset wavelength, the whole cycle number and the carrier wave phase.
Preferably, the step of calculating the displacement value of the monitoring point relative to the reference point according to the initial distance, the predetermined wavelength, the whole cycle number and the carrier phase specifically includes: calculating the actual distance between the reference point and the monitoring point according to the whole cycle number, the preset wavelength and the carrier phase; and calculating the displacement value of the monitoring point relative to the reference point according to the actual distance and the initial distance.
Preferably, the carriers are GPS system L1 carriers, beidou system B1 carriers, ZIGBEE carriers.
In order to solve the technical problem, the invention adopts another technical scheme that: the utility model provides a displacement monitoring system based on carrier phase, includes carrier emission module, carrier receiving module and displacement monitoring module, wherein: the carrier transmitting module is used for transmitting carriers with preset wavelengths to a monitoring point at a reference point, wherein the initial distance between the reference point and the monitoring point is selected in advance; the carrier receiving module is used for receiving the carrier at the monitoring point, measuring the carrier phase of the carrier and sending the carrier phase to the displacement monitoring module; the displacement monitoring module is used for calculating the whole cycle number of the received carrier wave according to the initial distance and the preset wavelength, and calculating the displacement value of the monitoring point relative to the reference point according to the initial distance, the preset wavelength, the whole cycle number and the carrier phase.
Preferably, the displacement monitoring module is specifically configured to calculate an actual distance between the reference point and the monitoring point according to the whole cycle number, the predetermined wavelength, and the carrier phase, and then calculate a displacement value of the monitoring point relative to the reference point according to the actual distance and the initial distance.
Preferably, the carriers are GPS system L1 carriers, beidou system B1 carriers, ZIGBEE carriers.
Different from the prior art, the invention has the beneficial effects that: the initial positions of the reference point and the monitoring point are selected in advance, the carrier wave with the preset wavelength is transmitted to the monitoring point at the reference point, the carrier phase of the carrier wave is calculated at the monitoring point, the displacement of the monitoring point relative to the reference point can be calculated according to the initial position, the preset wavelength, the whole cycle number and the carrier phase, the whole cycle number of the carrier wave received by the monitoring point is not required to be measured only by measuring the carrier phase, the cost of displacement monitoring can be reduced, meanwhile, higher monitoring precision is ensured, the method and the device can be popularized and applied to the fields of geological disaster prevention, high-speed rail construction, subway construction and the like, and huge production benefits are generated.
Drawings
Fig. 1 is a schematic flowchart of a carrier phase-based displacement monitoring method according to an embodiment of the present invention.
Fig. 2 is a schematic structural diagram of a displacement monitoring system based on carrier phase according to an embodiment 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.
Referring to fig. 1, a schematic flow chart of a displacement monitoring method based on carrier phase according to an embodiment of the present invention is shown. The displacement monitoring method of the embodiment comprises the following steps:
s1: a carrier wave of a predetermined wavelength is transmitted at the reference point to the monitoring point, wherein an initial distance between the reference point and the monitoring point is preselected.
The carrier may be a GPS system L1 carrier, a beidou system B1 carrier, or a ZIGBEE carrier, or may be another type of carrier. After the carrier is selected, the corresponding wavelength can be determined. The initial distance between the reference point and the monitoring point may be measured by laser ranging or other means.
S2: a carrier is received at a monitoring point and the carrier phase of the carrier is measured.
Wherein, the carrier phase can be measured through setting up GPS chip or big dipper chip at the monitoring point. The carrier wave between the reference point and the monitoring point usually comprises an incomplete period besides an integer number of periods, and even if the monitoring point generates displacement in the industries of building construction, geological disaster, high-speed rail construction, subway construction, operation and the like, the displacement value is very small and does not exceed one carrier wave wavelength, so that the whole cycle number of the carrier wave between the reference point and the monitoring point does not change, only the carrier phase of the incomplete period needs to be calculated, and the whole cycle number of the carrier wave between the reference point and the monitoring point does not need to be measured independently.
S3: and calculating the whole cycle number of the received carrier wave according to the initial distance and the preset wavelength, and calculating the displacement value of the monitoring point relative to the reference point according to the initial distance, the preset wavelength, the whole cycle number and the carrier phase.
In this embodiment, the step of calculating the displacement value of the monitoring point relative to the reference point according to the initial distance, the predetermined wavelength, the whole cycle number, and the carrier phase specifically includes:
calculating the actual distance between the reference point and the monitoring point according to the whole cycle number, the preset wavelength and the carrier phase;
and calculating the displacement value of the monitoring point relative to the datum point according to the actual distance and the initial distance.
After the actual distance is calculated, the actual coordinate of the monitoring point can be obtained according to the actual distance, the initial coordinate of the monitoring point can be obtained according to the initial distance, and the displacement value can be calculated by comparing the actual coordinate with the initial coordinate. Assume that the initial distance is L0When the predetermined wavelength is λ, the whole number of cycles N is int (L)0Lambda), i.e. the number of complete revolutions N is L0Integer obtained from/λ. Suppose the actual distance is L1The carrier phase isThen the actual distanceWherein,both N and λ are known. Finally, according to the initial distance L0Actual distance L1The border measuring network can be adopted for networking adjustment, and the initial coordinates and the actual coordinates of the monitoring points can be calculated through adjustment.
Fig. 2 is a schematic structural diagram of a carrier phase-based displacement monitoring system according to an embodiment of the present invention. The displacement monitoring system of the present embodiment includes a carrier transmitting module 11, a carrier receiving module 12, and a displacement monitoring module 13.
The carrier wave transmitting module 11 is used for transmitting a carrier wave with a preset wavelength to a monitoring point at a reference point, wherein the initial distance between the reference point and the monitoring point is selected in advance. The carrier may be a GPS system L1 carrier, a beidou system B1 carrier, or a ZIGBEE carrier, or may be another type of carrier. After the carrier is selected, the corresponding wavelength can be determined. The initial distance between the reference point and the monitoring point may be measured by laser ranging or other means.
The carrier receiving module 12 is configured to receive a carrier at a monitoring point, measure a carrier phase of the carrier, and send the carrier phase to the displacement monitoring module 13. Wherein, the carrier phase can be measured through setting up GPS chip or big dipper chip at the monitoring point. The carrier wave between the reference point and the monitoring point usually comprises an incomplete period besides an integer number of periods, and even if the monitoring point generates displacement in the industries of building construction, geological disaster, high-speed rail construction, subway construction, operation and the like, the displacement value is very small and does not exceed one carrier wave wavelength, so that the whole cycle number of the carrier wave between the reference point and the monitoring point does not change, only the carrier phase of the incomplete period needs to be calculated, and the whole cycle number of the carrier wave between the reference point and the monitoring point does not need to be measured independently.
The displacement monitoring module 13 is configured to calculate the number of whole cycles of the received carrier according to the initial distance and the predetermined wavelength, and calculate a displacement value of the monitoring point relative to the reference point according to the initial distance, the predetermined wavelength, the number of whole cycles, and the carrier phase.
In this embodiment, the displacement monitoring module 13 is specifically configured to calculate an actual distance between the reference point and the monitoring point according to the whole cycle number, the predetermined wavelength, and the carrier phase, and then calculate a displacement value of the monitoring point relative to the reference point according to the actual distance and the initial distance. Wherein, assume the initial distance is L0When the predetermined wavelength is λ, the whole number of cycles N is int (L)0Lambda), i.e. the number of complete revolutions N is L0Integer obtained from/λ. Suppose the actual distance is L1The carrier phase isThen the actual distanceWherein,both N and λ are known. Finally, according to the initial distance L0Actual distance L1The border measuring network can be adopted for networking adjustment, and the initial coordinates and the actual coordinates of the monitoring points can be calculated through adjustment.
In the prior art, the calculation of the whole cycle number from the transmitting end to the receiving end in the GPS positioning and ranging process has a considerable difficulty, and the calculation difficulty of the whole cycle number is also the bottleneck problem of the current GPS positioning. Compared with the prior art, the displacement monitoring method and the displacement monitoring system based on the carrier phase do not need to calculate the whole cycle number from the transmitting end to the receiving end in the GPS positioning and ranging process, and the displacement variation of the allowed monitoring point in the monitoring industry is very small, so that a whole cycle cannot be influenced, the high-precision displacement monitoring can be realized only by measuring the carrier phase, the phase measurement precision is about one hundredth, and the monitoring precision can reach millimeter level. Therefore, the cost for measuring the carrier phase is low, and the precision is high, so that the cost for monitoring the displacement can be reduced, and the high monitoring precision is ensured.
The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes performed by the present specification and drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (5)
1. A displacement monitoring method based on carrier phase is characterized by comprising the following steps:
transmitting a carrier wave with a preset wavelength to a monitoring point at a reference point, wherein the initial distance between the reference point and the monitoring point is selected in advance, and the initial coordinate of the monitoring point can be obtained according to the initial distance;
receiving the carrier wave at the monitoring point, and measuring the carrier phase of the carrier wave; calculating the whole cycle number of the received carrier wave according to the initial distance and the preset wavelength;
calculating the actual distance between the reference point and the monitoring point according to the whole cycle number, the preset wavelength and the carrier phase, so as to obtain the actual coordinate of the monitoring point according to the actual distance;
and calculating the displacement value of the monitoring point relative to the reference point according to the actual coordinate and the initial coordinate.
2. The displacement monitoring method of claim 1, wherein the carrier is a GPS system L1 carrier, a Beidou system B1 carrier, or a ZIGBEE carrier.
3. The utility model provides a displacement monitoring system based on carrier phase place, its characterized in that includes carrier emission module, carrier receiving module and displacement monitoring module, wherein:
the carrier transmitting module is used for transmitting carriers with preset wavelengths to a monitoring point at a reference point, wherein the initial distance between the reference point and the monitoring point is selected in advance;
the carrier receiving module is used for receiving the carrier at the monitoring point, measuring the carrier phase of the carrier and sending the carrier phase to the displacement monitoring module;
the displacement monitoring module is used for calculating the whole cycle number of the received carrier wave according to the initial distance and the preset wavelength, and calculating the displacement value of the monitoring point relative to the reference point according to the initial distance, the preset wavelength, the whole cycle number and the carrier phase.
4. The displacement monitoring system of claim 3, wherein the displacement monitoring module is specifically configured to calculate an actual distance between the reference point and the monitoring point according to the number of whole cycles, the predetermined wavelength, and the carrier phase, and then calculate a displacement value of the monitoring point relative to the reference point according to the actual distance and the initial distance.
5. The displacement monitoring system of claim 3, wherein the carrier is a GPS system L1 carrier, a Beidou system B1 carrier, a ZIGBEE carrier.
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| CN105540369A (en) * | 2015-12-29 | 2016-05-04 | 永大电梯设备（中国）有限公司 | Method for detecting absolute position of lift car and control system and method of absolute position of lift |
| CN106289078A (en) * | 2016-07-25 | 2017-01-04 | 余代俊 | A kind of total powerstation instrument high measurement method |
| CN106604391A (en) * | 2016-11-14 | 2017-04-26 | 上海斐讯数据通信技术有限公司 | Indoor wifi positioning method and server |
| CN111649664A (en) * | 2020-06-17 | 2020-09-11 | 阳光学院 | Indoor building structure configuration height-changing precision monitoring method and system |
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| JP5350331B2 (en) * | 2010-06-15 | 2013-11-27 | 株式会社京三製作所 | Distance sensor |
| CN102323578B (en) * | 2011-06-01 | 2013-06-19 | 重庆大学 | Microwave distance measurement-based three-dimensional displacement monitoring device and method |
| CN102435165B (en) * | 2011-09-07 | 2013-07-24 | 石家庄铁道大学 | CNSS (COMPASS navigation satellite system)-based long-term ground facility deformation monitoring method |
| CN102590808B (en) * | 2012-01-12 | 2013-12-18 | 重庆大学 | Multi-measurement-tape microwave phase distance measurement method based on carrier modulation principle |
| JP2013195117A (en) * | 2012-03-16 | 2013-09-30 | Ricoh Co Ltd | Distance measurement device |
| CN203501991U (en) * | 2013-10-23 | 2014-03-26 | 三峡大学 | Wireless monitoring apparatus for mountain landslide |
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| 调频型相位法微波测距关键技术研究;严蓉;《中国优秀硕士学位论文全文数据库 工程科技II辑》;20150115(第01期);第6页第2段至第8页第2段 * |
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