阅读说明：本技术 一种基于光纤光栅的压差式静力水准装置 (A kind of differential static level device based on fiber grating ) 是由 胡长华 于 2019-09-10 设计创作，主要内容包括：一种基于光纤光栅的压差式静力水准装置,它是通过光纤光栅传感器测量测点处与基准点处压力之差,代表了各测点的静力水准值,压差可消除温度等环境条件对液位的影响。该装置体积小,结构简单,操作简便,适合于各种结构的静力水准测量。(A kind of differential static level device based on fiber grating, it be by fiber-optic grating sensor measure measuring point at and datum pressure difference, represent the static level value of each measuring point, pressure difference can eliminate influence of the environmental conditions such as temperature to liquid level.The device volume is small, and structure is simple, easy to operate, is suitable for the hydrostatic leveling of various structures.)

1. a kind of differential static level device based on fiber grating, it is characterized in that: liquid storage cylinder (1) is installed to settling position Place, uses pipeline (5) to connect a static(al) box body (3) on hand as datum mark, then install other static(al) at other needs Box body (3) is used as measuring point, by pipeline (5) connection of each static(al) box body (3), with optical fiber by the fiber grating on static(al) box body (3) Sensor (4) is concatenated on fiber Bragg grating (FBG) demodulator (2).

Technical field:

The present invention relates to a kind of static level device, specifically a kind of differential static level based on fiber grating Device.

Background technique:

Hydrostatic leveling is widely used in many engineering structures such as building, bridge, tunnel, passes through static level Available vertical displacement and inclined monitoring.Compared to traditional electric measuring method, fiber grating measurement has remote, not charged The characteristics of, using very convenient in large scale structure measurement.Patent

The hydrostatic level of fiber grating is proposed in CN101408463A and CN204788355U respectively, they are all based on Liquid level principle, is made of spar structures, and volume is larger, and internal structure is complicated, and range is small (600mm or less), if to be mounted on In the round tube of minor diameter or range is to several meters, it is clear that is unable to measure.

Summary of the invention:

The purpose of the present invention is to solve the shortcomings of the prior art and providing a kind of differential static(al) based on fiber grating Leveling device.The device uses principle of differential pressure, and small in size, structure is simple, easy to operate.

Technical solution of the present invention:

A kind of differential static level device based on fiber grating, it is characterised in that: static(al) box body, upper cover are elasticity Thin slice, posts fiber-optic grating sensor outside thin slice, and box body both ends are equipped with fluid-through tube connector, when measurement, installs at base position Liquid storage cylinder, one static(al) box body of lower end outlet connection, installs other static(al) box body, by pipeline by institute at the measuring point of needs There is static(al) box body to be serially connected, then all fiber-optic grating sensors are connected in series on fiber Bragg grating (FBG) demodulator, measures each measuring point Static level data at measuring point can be obtained with datum pressure difference.

The beneficial effects of the present invention are: compared with the prior art, the present invention is a kind of differential quiet based on fiber grating Power leveling device, small in size, structure is simple, easy to operate.

Detailed description of the invention:

Fig. 1 is structural schematic diagram of the invention.

Marked in the figure: 1 liquid storage cylinder, 2 fiber Bragg grating (FBG) demodulators, 3 static(al) box bodys, 4 fiber-optic grating sensors, 5 pipelines.

Specific embodiment:

As shown in Figure 1, a kind of differential static level device based on fiber grating.Including 1 liquid storage cylinder, 2 fiber gratings (FBG) demodulator, 3 static(al) box bodys, 4 fiber-optic grating sensors, 5 pipelines.

Liquid storage cylinder 1 is installed at settling position, pipeline 5 is used to connect a static(al) box body 3 on hand as datum mark, then Other static(al) box body 3 is installed at other needs as measuring point, each pipeline 5 of static(al) box body 3 is connected, with optical fiber by static(al) Fiber-optic grating sensor 4 on box body 3 is concatenated on fiber Bragg grating (FBG) demodulator 2.

The differential static level device working principle based on fiber grating is: fiber Bragg grating (FBG) demodulator measurement is each The fiber-optic grating sensor pressure data of a position, the difference of pressure and benchmark place pressure represents static level value at measuring point, and The liquid level influence generated by environmental conditions such as temperature can be eliminated by pressure difference.