TW201400672A - Sensing method of fully optical fiber integral bridge security sensing system - Google Patents

Abstract

The present invention provides a sensing method of a fully optical fiber integral bridge security sensing system having smart phone voice alarm. The fully optical fiber integral bridge security sensing system comprises stabilizers, optical fiber sensing devices and communication devices. The basic structure is to connect cables and optical fibers at two ends via sumitubes, measuring zones being located between two sumitubes, a predetermined tension being applied to the measuring zones by the stabilizers. A strain can be sensed by the optical sensing device by means of a grating of the measuring zone in the optical fiber. When the measuring zone is subjected to a strain, the measuring zone switches from a first state to a second state and generates a signal variation in a reflection signal. A signal processing device converts the signal variation of the reflection signal to a physical parameter and transmit an alarm signal to a user end via the communication devices. The alarm signal is transmitted to the mobiles phones of users to report the security condition of the bridge secure in human language.

Description

Sensing method for all-fiber full-bridge bridge safety monitoring and integration system

The invention relates to an all-fiber bridge full-bridge safety monitoring and integration system with smart phone voice alarm, in particular to an all-fiber full-bridge bridge safety monitoring and integration system with a grating and a communication device, which is used for measuring the civil structure of the bridge. The warning signal is transmitted to the user through the communication device, the warning signal is transmitted to the user's mobile phone, and the bridge security state is actively notified by human language.

Civil engineering facilities are vital to the lives and property of the people. Many civil facilities such as bridges, roads, tunnels, reservoirs, harbors, etc. have gradually become more saturated. The development and management plans for civil facilities will gradually be converted from construction to maintenance. . On the other hand, Taiwan's early years of land development did not pay attention to soil and water conservation work, and the frequent occurrence of natural disasters such as earthquakes and typhoons, hydrology and geography have been relatively unstable.

Many newly completed civil facilities have structural safety concerns over the life of the building. For the existing bridge structure, in order to achieve the design life, or to extend the service life due to economic considerations, the use of the situation requires a set of immediate monitoring devices for these engineering structures. Concealed security is monitored over time to detect problems in real time and to repair or reinforce them appropriately to prevent loss of life and property due to structural damage.

The structural safety monitoring time of civil facilities will gradually shift from the construction phase of the past to the operational use phase. Remote and immediate monitoring can effectively reduce monitoring Cost, strengthen the early warning function, and take the priority of the allocation of funds for the repair, maintenance and replacement of civil facilities, and the necessary means for the safe management of civil facilities.

For new structures, such as the high-speed railway project or other important structural projects to be built, the quality, safety requirements and service life required for the structure are higher than the general civil structure. At this time, the monitoring device will play Important roles to ensure their security and service capabilities.

The purpose of the invention is to assist the bridge manager to perform the normal bridge inspection operation with economical and efficient measurement technology; in the event of an earthquake or flood, the bridge safety monitoring, in the event of an emergency, immediately transmit a warning to provide protection for passers-by. And disaster prevention management.

One of the objectives of the present invention is to provide an all-fiber bridge full-bridge bridge safety monitoring integrated system with smart phone voice alarm and a sensing method thereof, and more particularly to an all-fiber full-bridge of a fiber sensing device with a grating and a communication device. The bridge safety monitoring and integration system can be used as an elevation meter, a displacement meter, a water level gauge and a steel cable vibrometer for measuring the civil structure of the bridge, and transmits a warning signal via the communication device, and issues a warning to the user end as a disaster prevention management.

The steps of the present invention are as follows: (a) providing a stabilizing device, a fiber sensing device, an optical device, and a signal processing device; (b) providing an optical fiber, two heat shrink sleeves, and a cable to the light a fiber sensing device, and at least one measuring device is formed on at least one measuring section of the optical fiber, wherein both ends of the cable are coupled to each other by opposite ends of the optical fiber by the heat shrinkable sleeve, and the measuring section is located at the Between the heat shrinkable sleeves, one end of the cable is connected to the stabilizing device, and the heat shrinkable sleeve is a fixed end with respect to the stabilizing device; wherein the measuring device is a grating. (c) coupling the optical device to one end of the optical fiber sensing device, wherein the optical device transmits an optical signal into the optical fiber, and the optical device receives the optical signal reflected by the measuring portion to reflect the signal; d) coupling the signal processing device to the optical device; (e) connecting one end of the stabilizing device to the other end of the fiber sensing device to provide a predetermined tension of the measuring segment, and then the measuring segment is maintained in a first state; Applying a strain to the measurement section to cause the measurement section to transition to a second state, when the measurement section is in the second state, the reflected signal produces a signal change; and (g) the signal processing device is to generate The reflected signal of the signal change is converted into physical parameters such as distance, vibration frequency, water level, height difference, and weight.

The coupled structure of the above construction: heat shrinkable sleeve, optical fiber, fiber grating, cable, is the core unit of the invention. Using the core unit, an elevation meter, a displacement meter, a water level gauge, and a steel cable vibration frequency monitor are respectively established.

In another aspect, the all-fiber full-bridge bridge safety monitoring and integration system further provides a communication device, and the communication device is connected to the signal processing device. When the reflected signal generates a signal change, the signal processing device controls the communication device to transmit a warning signal. . The communication device transmits the warning signal through a wireless network or a wired network. Warning signals are transmitted by SMS, email, or voice message Set the user.

By using a fiber grating sensor as a measuring tool for the bridge structure, it can be used as a sensing instrument for various bridges to monitor the condition of the bridge in real time, and can also transmit a warning signal to the manager via the communication device in an emergency situation. Keep abreast of the current situation of the bridge, so that the manager can make the correct disposal at the first time and reduce the expansion of the disaster.

For a better understanding of the features and technical aspects of the present invention, reference should be made to the accompanying drawings.

1A is a schematic diagram of an elevation meter 100 in accordance with an embodiment of the present invention. The elevation meter 100 is illustrated as having a first acrylic tube 102 and a second acrylic tube 104. The first communication tube 152 is connected between the first acrylic tube 102 and the second acrylic tube 104. The first acrylic tube 102 and the second acrylic tube 104 are internally provided with a liquid, and the first communication tube 152 is connected therebetween. According to the principle of the communication tube in the physics, the first acrylic tube 102 and the second The liquid level of the liquid in the acrylic tube 104 is maintained at the same level. Figure 1A has a first all-fiber full bridge bridge safety monitoring integration system 112 and a second all-fiber full bridge bridge safety monitoring integration system 114, which are respectively disposed on the first acrylic tube 102 and the second acrylic tube 104 internal. As shown in the figure, one end of the first all-fiber full-bridge bridge safety monitoring integration system 112 is connected to a first fixed end 122 and the other end is floated in the liquid by the first stabilizing device 1120, and the phase The first heat shrink sleeve 12130 of the first stabilizing device 1120 is a first fixed end 122, and the first all-fiber full bridge bridge safety monitoring integrated system 112 is fixed to the first press by the first heat shrink sleeve 11230. The force tube 102, in this embodiment, the first stabilizing device 1120 is, for example, a styroic cylinder, and a circular iron block 1121 is connected under the first stabilizing device 1120 to provide the downward gravity of the stabilizing device 1120. One end of the second all-fiber full-bridge bridge safety monitoring integration system 114 is connected to the second fixed end 122 and the other end is floated in the liquid by the second stabilizing device 1140 and is opposite to the second heat of the second stabilizing device 1140. The shrink sleeve 11430 is a second fixed end 124 and the second all-fiber full bridge bridge safety monitoring integrated system 114 is secured to the second acrylic tube 104 by a second heat shrink sleeve 11430. In this embodiment, the second stabilizing device 1140 is, for example, a styroic cylinder, and the second stabilizing device 1140 is connected to a circular iron block 1141 to provide a downward gravity of the stabilizing device 1120.

In this embodiment, the first stabilizing device 1120 and the second stabilizing device 1140 are floating devices or styrofoam. The other end of the first stabilizing device 1120 is connected to the first cable 12228 of the first fiber sensing device 1122. In this embodiment, a carbon fiber line is used, and the other end of the second stabilizing device 1140 is connected to the second fiber sensing device. The second cable 1142 of 1142, in this embodiment, is a carbon fiber. By the buoyancy of the first stabilizing device 1120, it provides a predetermined pulling force of the first fiber optic sensing device 1122 to maintain the first measuring segment 11222 in the first state. Similarly, one end of the second all-fiber full-bridge bridge safety monitoring integration system 114 is connected to a second fixed end 124, and the other end is floated by the stabilizing device 1140. In the body, and by the buoyancy of the second stabilizing device 1140, it provides a predetermined pulling force of the second fiber sensing device 1142 to maintain the second measuring portion 11422 in the first state.

In this embodiment, the elevation meter 100 includes two acrylic tubes and two all-fiber full bridge bridge safety monitoring integration systems. However, the elevation meter also includes other numbers of acrylic tubes and all-fiber full bridges. The combination of safety monitoring and integration systems, for example, three acrylic tubes and three all-fiber full-bridge bridge safety monitoring integration systems, an example is given for illustrative purposes only, and the number is not limited thereto. It should be noted that the combination of the number of acrylic tube and the all-fiber full-bridge bridge safety monitoring integrated system in the elevation meter needs to be configured according to the length of the bridge structure to be tested.

Figure 1B is a schematic diagram of an all-fiber full bridge bridge safety monitoring integration system 112 in the elevation meter of Figure 1A. As shown, the first all-fiber full-bridge bridge safety monitoring integration system 112 includes a first stabilization device 1120, a first fiber sensing device 1122, a first optical device 1124, and a first signal processing device 1126. The first fiber optic sensing device 1122 includes a first optical fiber 11220, a first measurement section 11222, a first measurement device 11224, and a first tube device 11226, a first cable 12228, and two first heat shrink sleeves 11230. . The first heat shrink sleeve 12230 shrinks due to heat. The two ends of the first cable 11228 are mutually joined by the first heat-shrinkable sleeves 11230 corresponding to the two ends of the first optical fiber 11220; the first measuring section 11222 is disposed in the optical fiber 11220, and is located in the first heat shrinkable sleeve 11230. between. First measuring device 11224 is set Placed within the first measurement section 11222 of the first optical fiber 11220.

The first tube device 11226 is wrapped around the first optical fiber 11220 and the first measurement portion 11222 to provide protection for the first optical fiber 11220 and the first measurement portion 11222. One end of the first fiber sensing device 1122 is connected to the first stabilizing device 1120. In this embodiment, the first measuring device 11224 is a grating.

The first optical device 1124 is disposed at one end of the first fiber sensing device 1122. The first optical device 1124 emits an optical signal S1 into the first optical fiber 11220, and the first optical device 1124 is also configured to receive the optical signal S1 from the first measurement segment 11222 to reflect one of the reflected signals S2. The optical signal S1 is a wide-band optical signal that satisfies the specific wavelength of the grating Bragg condition when passing through the first measuring device 11224 (ie, the grating), and reflects the reflected signal S2 to the first optical device 1124. The first signal processing device 1126 is coupled to the first optical device 1124. The first optical device 1124 and the first signal processing device 1126 are coupled to the first fiber sensing device 1122 via the first coupler 1129. The first stabilizing device 1120 is coupled to the first fiber optic sensing device 1122 to provide a predetermined pulling force for the first measuring portion 11222 to maintain the first measuring portion 11222 in the first state. The first barrel device 11226 is configured to transmit a strain to the first measurement section 1122 of the first fiber optic sensing device 1122.

When the first measurement section 11222 is strained by an external force, the first measurement section 11222 is changed due to the tensile force, thereby causing the first measurement section 11222 to transition to the second state, at which time the reflection signal S2 is The first signal change is generated. Subsequently, the first signal processing device 1126 will generate the first signal change. The reflected signal S2 is converted into a physical parameter. When the reflected signal S2 generates a signal change, the first signal processing device 1126 transmits an alert signal Sw to a use terminal U1. It should be noted that FIG. 1B only uses the first all-fiber full-bridge bridge safety monitoring integrated system 112 as an illustration, and the structure and operation principle of the second all-fiber full-bridge bridge safety monitoring integrated system 114 are also the same. This will not be repeated here.

Please refer to FIG. 1A, FIG. 1B, and FIG. 2A. 2A is a schematic diagram of an elevation meter according to another embodiment of the present invention. In this embodiment, the elevation meter 100 is the same as the embodiment of FIG. 1A, wherein FIG. 2A illustrates an embodiment in which the first acrylic tube 102 is sunk in the elevation meter 100, when the first acrylic tube 102 When sinking, the first fixed end 122 is sunk, and the first heat shrinkable sleeve 11230 simultaneously drives the first fiber sensing device 1122 to move. Finally, the first cable 12228 conducts the first all-fiber type. The buoyancy of the first stabilizer 1120 of the bridge bridge safety monitoring integration system 112 is changed, and the first all-fiber full bridge bridge safety monitoring integration system 112 can measure the sinking event. In this embodiment, the first stabilizing device 1120 and the second stabilizing device 1140 are, for example, a floating device or a styrofoam.

The first acrylic tube 102 and the second acrylic tube 104 are connected by a first communication tube 152, and the liquid level maintains the same liquid level. Actual measurement, as shown in FIG. 3B, 3B The figure is a schematic diagram of an elevation meter disposed on two bridge piers of a bridge according to another embodiment of the present invention. The two acrylic pipe positions 102 and 104 are respectively disposed on the piers 340 and 342, respectively, due to normal conditions. The piers 340, 342 are located on the same level, so that the liquid system filled inside is maintained at the same level. Therefore, the volume of the first stabilizing device 1120 is lowered into the liquid, the depth is deeper, and the buoyancy is also larger, thereby also changing the pulling force of the first cable 11228 of the first fiber sensing device 112, and the first fiber The first measurement section 11222 of 11220 changes from the first state to the second state. The first optical device 1124 emits an optical signal S1 into the first measuring device 11224 of the first optical fiber 11220, that is, a grating. Since the first measuring portion 11222 changes from the first state to the second state, the optical signal S1 is reflected by the grating. The reflected signal S2 corresponds to the first signal change. Subsequently, the first signal processing device 1126 converts to a physical parameter, that is, a descending height value, according to the reflected signal S2, and notifies the user, thereby achieving the function of real-time monitoring and early warning. In the actual measurement situation, as shown in FIG. 3C, wherein FIG. 3C is a schematic diagram of an elevation meter disposed on two bridges of a bridge according to another embodiment of the present invention. When the pier 340 sinks, the first acrylic tube 102 also sinks, and therefore, the first all-fiber full bridge bridge safety monitoring integration system 112 is pulled downward. The first fiber optic sensing device 1122 is also pulled downward, causing the first stabilizing device 1120 to simultaneously pull the first fiber optic sensing device 1122.

Please refer to FIG. 1C and FIG. 1D. FIG. 1C is a schematic diagram of an elevation meter 100 according to another embodiment of the present invention. The first 1D is a schematic diagram of an all-fiber full bridge bridge safety monitoring integration system 112 in the elevation of the 1C chart. The elevation meter 100 has a first acrylic tube 102 and a second acrylic tube 104. The first communication tube 152 is connected between the first acrylic tube 102 and the second acrylic tube 104. The first acrylic tube 102 and the second acrylic tube 104 are internally provided with a liquid, and the first communication tube 152 is connected therebetween. According to the principle of the communication tube in the physics, the first acrylic tube 102 and the second The liquid level of the liquid in the acrylic tube 104 is maintained at the same level. 1C has a first all-fiber full bridge bridge safety monitoring integration system 112 and a second all-fiber full bridge bridge safety monitoring integration system 114, which are respectively disposed on the first acrylic tube 102 and the second acrylic tube 104 internal. As shown in the figure, one end of the first all-fiber full-bridge bridge safety monitoring integration system 112 is connected to a first fixed end 122 and the other end is floated in the liquid by the first stabilizing device 1120, and is stable relative to the first The first heat shrink sleeve 12230 of the device 1120 is a first fixed end 122, and the first all-fiber full bridge bridge safety monitoring integrated system 112 is fixed to the first acrylic tube 102 by the first heat shrink sleeve 11230. In this embodiment, the first stabilizing device 1120 is, for example, a styroic cylinder. The first stabilizing device 1120 is connected to a circular iron block 1121 to provide a downward gravity of the stabilizing device 1120. One end of the second all-fiber full-bridge bridge safety monitoring integration system 114 is connected to the second fixed end 122 and the other end is floated in the liquid by the second stabilizing device 1140 and is opposite to the second heat of the second stabilizing device 1140. The shrink sleeve 11430 is a second fixed end 124 and the second all-fiber full bridge bridge safety monitoring integrated system 114 is secured to the second acrylic tube 104 by a second heat shrink sleeve 11430. In this embodiment, the second stabilizing device 1140 is, for example, a styroic cylinder, and the second stabilizing device 1140 is connected to a circular iron block 1141 to provide a downward gravity of the stabilizing device 1120.

In this embodiment, the first stabilizing device 1120 and the second stabilizing device 1140 are floating devices or styrofoam. The other end of the first stabilizing device 1120 is connected to the first cable 12228 of the first fiber sensing device 1122. In this embodiment, a carbon fiber line is used, and the other end of the second stabilizing device 1140 is connected to the second fiber sensing device. The second cable 1142 of 1142, in this embodiment, is a carbon fiber. By the buoyancy of the first stabilizing device 1120, it provides a predetermined pulling force of the first fiber optic sensing device 1122 to maintain the first measuring segment 11222 in the first state. Similarly, one end of the second all-fiber full-bridge bridge safety monitoring integration system 114 is connected to a second fixed end 124, and the other end is floated in the liquid by the stabilizing device 1140, and by the second stabilizing device 1140 The buoyancy provides a predetermined pulling force of the second fiber sensing device 1142 to maintain the second measuring segment 11422 in the first state.

In this embodiment, the elevation meter 100 includes two acrylic tubes and two all-fiber full bridge bridge safety monitoring integration systems. However, the elevation meter also includes other numbers of acrylic tubes and all-fiber full bridges. The combination of safety monitoring and integration systems, for example, three acrylic tubes and three all-fiber full-bridge bridge safety monitoring integration systems, an example is given for illustrative purposes only, and the number is not limited thereto. It should be noted that the combination of the number of acrylic tube and the all-fiber full-bridge bridge safety monitoring integrated system in the elevation meter needs to be configured according to the length of the bridge structure to be tested.

Referring to FIG. 1D, the first all-fiber full-bridge bridge safety monitoring integration system 112 includes: a first stabilizing device 1120, and a first fiber sensing device 1122. The first optical device 1124 and the first signal processing device 1126. The first fiber optic sensing device 1122 includes a first optical fiber 11220, a first measurement section 11222, a first measurement device 11224, and a first tube device 11226, a first cable 12228, and two first heat shrink sleeves 11230. . The first heat shrink sleeve 12230 shrinks due to heat. The two ends of the first cable 11228 are mutually joined by the first heat-shrinkable sleeves 11230 corresponding to the two ends of the first optical fiber 11220; the first measuring section 11222 is disposed in the optical fiber 11220, and is located in the first heat shrinkable sleeve 11230. between. The first measuring device 11224 is disposed within the first measurement section 11222 of the first optical fiber 11220.

The first tube device 11226 is wrapped around the first optical fiber 11220 and the first measurement portion 11222 to provide protection for the first optical fiber 11220 and the first measurement portion 11222. One end of the first fiber sensing device 1122 is connected to the first stabilizing device 1120. In this embodiment, the first measuring device 11224 is a grating.

The first optical device 1124 is disposed at one end of the first fiber sensing device 1122. The first optical device 1124 emits an optical signal S1 into the first optical fiber 11220, and the first optical device 1124 is also configured to receive the optical signal S1 from the first measurement segment 11222 to reflect one of the reflected signals S2. The optical signal S1 is a wide-band optical signal that satisfies the specific wavelength of the grating Bragg condition when passing through the first measuring device 11224 (ie, the grating), and reflects the reflected signal S2 to the first optical device 1124. The first signal processing device 1126 is coupled to the first optical device 1124. The first optical device 1124 and the first signal processing device 1126 are coupled to the first fiber sensing device 1122 via the first coupler 1129. First stabilizing device 1120 The first fiber optic sensing device 1122 is coupled to provide a predetermined tension of the first measurement section 11222 to maintain the first measurement section 11222 in the first state. The first barrel device 11226 is configured to transmit a strain to the first measurement section 1122 of the first fiber optic sensing device 1122.

When the first measurement section 11222 is strained by an external force, the first measurement section 11222 is changed due to the tensile force, thereby causing the first measurement section 11222 to transition to the second state, at which time the reflection signal S2 is The first signal change is generated. Subsequently, the first signal processing device 1126 converts the reflected signal S2 that generates the first signal change into a physical parameter. When the reflected signal S2 generates a signal change, the first signal processing device 1126 transmits an alert signal Sw to a use terminal U1. It should be noted that the first D-picture only uses the first all-fiber full-bridge bridge safety monitoring integrated system 112 as an illustration, and the structure and operation principle of the second all-fiber full-bridge bridge safety monitoring integrated system 114 are also the same. This will not be repeated here.

Please refer to the 1C, 1D, and 2B drawings. Figure 2B is a schematic diagram of an elevation meter in accordance with another embodiment of the present invention. In this embodiment, the elevation meter 100 is the same as the embodiment of FIG. 1C, wherein FIG. 2B illustrates an embodiment in which the first acrylic tube 102 sinks in the elevation meter 100, when the first acrylic tube 102 When sinking, the first fixed end 122 is sunk, and the first heat shrinkable sleeve 11230 simultaneously drives the first fiber sensing device 1122 to move. Finally, the first cable 12228 conducts the first all-fiber type. The first stabilizer 1120 of the bridge bridge safety monitoring integration system 112 changes buoyancy, then the first all-fiber full bridge The bridge safety monitoring integration system 112 can measure the occurrence of sinking events. In this embodiment, the first stabilizing device 1120 and the second stabilizing device 1140 are, for example, a floating device or a styrofoam.

The first acrylic tube 102 and the second acrylic tube 104 are connected by a first communication tube 152, and the liquid level maintains the same liquid level. Actual measurement, as shown in FIG. 3B, 3B The figure is a schematic diagram of an elevation meter disposed on two bridge piers of a bridge according to another embodiment of the present invention. The two acrylic pipe positions 102 and 104 are respectively provided with bridge piers 340 and 342, and the bridge pier 340 is normal. The 342 system is on the same level, so the liquid system filled inside is maintained at the same level. Therefore, the volume of the first stabilizing device 1120 is lowered into the liquid, the depth is deeper, and the buoyancy is also larger, thereby also changing the pulling force of the first cable 11228 of the first fiber sensing device 112, and the first fiber The first measurement section 11222 of 11220 changes from the first state to the second state. The first optical device 1124 emits an optical signal S1 into the first measuring device 11224 of the first optical fiber 11220, that is, a grating. Since the first measuring portion 11222 changes from the first state to the second state, the optical signal S1 is reflected by the grating. The reflected signal S2 corresponds to the first signal change. Subsequently, the first signal processing device 1126 converts to a physical parameter, that is, a descending height value, according to the reflected signal S2, and notifies the user, thereby achieving the function of real-time monitoring and early warning.

Please refer to FIGS. 1C, 1D and 2B. In this embodiment, the first all-fiber full-bridge bridge safety monitoring and integration system 1120 includes a first communication device 1128, and the first communication device 1128 is connected to the first signal processing device 1126. Reflective signal When the S2 generates a signal change, the first signal processing device 1126 controls the first communication device 1128 to transmit an alert signal Sw to a user terminal U1, wherein the alert signal Sw is transmitted to the mobile terminal U1, and the bridge is actively notified in a human language manner. Security status. The first communication device 1128 transmits the warning signal Sw through a wireless network or a wired network. It should be noted that the warning signal Sw is transmitted by means of a short message, an email or a voice message.

Please refer to FIG. 3E , which is a schematic diagram of an all-fiber bridge full-bridge bridge security monitoring and integration system with smart phone voice alarm according to an embodiment of the present invention. Please refer to FIG. 3E. For example, the first communication device 1128 transmits the warning signal Sw to the mobile phone U11 of the bridge manager U1 via the network, and the first communication device 1128 also activates the warning device 350, such as a warning light. , alarm bells or voice alarms to provide warnings for nearby passers-by.

The invention also provides a sensing method, the flow chart of which is shown in Fig. 3A. To illustrate an embodiment of the sensing method of the present invention, and in conjunction with FIG. 1A, FIG. 1B, and FIG. 2, the sensing method includes the following steps:

Step 304 provides a first fiber sensing device 1122 and a second fiber sensing device 1142, a first fiber 12220, a second fiber 11420, a first optical device 1124, a second optical device 1144, a first signal processing device 1126, and a second The signal processing device 1146 and the first stabilizing device 1120 and the second stabilizing device 1140.

As shown in FIGS. 1A and 1B, the elevation meter 100 has a first acrylic tube 102 and a second acrylic tube 104. The first communication tube 152 is connected to the first pressure The force tube 102 is between the second acrylic tube 104. Since the first acrylic tube 102 and the second acrylic tube 104 are in communication with each other, when the two acrylic tubes are located at the same horizontal plane, the liquid system filled therein maintains the same horizontal plane, and the first stabilizing device 1120, The second stabilizing device 1140 is a stabilizing device of the same volume and the same material. Therefore, the first stabilizing device 1120 and the second stabilizing device 1140 are all located at the same horizontal plane. In actual measurement, as shown in FIG. 3B, FIG. 3B is a schematic diagram of an elevation meter disposed on two bridge piers of a bridge according to another embodiment of the present invention, and two acrylic tube positions 102 and 104 are respectively set. On the piers 340 and 342, since the piers 340 and 342 are normally located on the same horizontal plane, the liquid system filled therein maintains the same horizontal plane.

Step 306 creates a first measurement device 11224 in the first measurement section 1122 of the first optical fiber 11220. A second measurement device 11424 is fabricated in the second measurement section 11422 of the second optical fiber 11420. As shown in Figure 1A. The first measuring device 11224 and the second measuring device 11424 are a grating structure. The first optical fiber 11220, the two first heat shrinkable sleeves 11230, and the first cable 12228 are provided on the first fiber sensing device 1122, and the first ends of the first cable 12228 are corresponding to each other by the first heat shrinkable sleeve 11230. The ends of a fiber 11220 are joined to each other, the first measuring section 11222 is located between the first heat shrinkable sleeves 11230, and one end of the first cable 11228 is connected to the first stabilizing device 1120. One end of the first all-fiber full-bridge bridge safety monitoring integration system 112 floats in the liquid by the first stabilizing device 1120, and is a first fixed end with respect to the first heat shrinkable sleeve 11230 of the first stabilizing device 1120. 122, the first all-fiber type The bridge bridge safety monitoring integration system 112 is secured to the first acrylic tube 102 by a first heat shrink sleeve 12230.

A second fiber 11420, two second heat shrink sleeves 11430, and a second cable 11428 are provided to the second fiber sensing device 1142. The two ends of the second cable 11428 are mutually engaged by the second heat-shrinkable sleeve 11430 corresponding to the two ends of the second optical fiber 11420, and the second measuring section 11422 is located between the second heat-shrinkable sleeves 11430, the second cable One end of the 11428 is connected to the second stabilizing device 1140, and one end of the second all-fiber full-bridge bridge safety monitoring integrated system 114 is floated in the liquid by the second stabilizing device 1140, and is second with respect to the second stabilizing device 1140. The heat shrink sleeve 11430 is a second fixed end 124, and the second all-fiber full bridge bridge safety monitoring integrated system 114 is fixed to the second acrylic tube 104 by a second heat shrink sleeve 11430.

In an embodiment of the invention, to provide fiber-optic protection, a first tube device 11226 and a second tube device 11426 are further provided, step 318. The first tube device 11226 is overlaid on the first optical fiber 11220 and the first measurement portion 11222. When subjected to a strain, the first tube device 11226 transmits the strain to the first of the first fiber sensing device 1122. Measurement section 11222. The second tube device 11426 is overcoated with the second fiber 11420 and the second measurement portion 11422. When subjected to a strain, the second tube device 11426 transmits strain to the second fiber sensing device 1142. Measurement section 11422.

Step 308, the first optical device 112 is coupled to one end of the first optical fiber sensing device 1122, and the first optical device 1124 emits an optical signal S1. The first optical device 1124 receives the optical signal S1 and reflects one of the reflected signals S2 reflected by the first measurement section 11222. The second optical device 1144 is coupled to one end of the second fiber sensing device 1142, the second optical device 1144 is configured to emit an optical signal S1 into the second optical fiber 11420, and the second optical device 1144 receives the optical signal S1 by the second measurement. One of the segments 11422 reflects one of the reflected signals S2.

Step 310, coupling the first signal processing device 1126 to the first optical device 1124. The second signal processing device 1146 is coupled to the second optical device 1144. In this embodiment, step 310 further includes step 320. Step 320 couples the other end of the first fiber sensing device 1122 to the first stabilizing device 1120. The other end of the second fiber sensing device 1142 is coupled to the second stabilizing device 1140.

In step 312, the first stabilizing device 1120 provides a predetermined pulling force of the first measuring section 11222 via the first fiber sensing device 1122, and then the first measuring section 11222 is maintained in the first state. The second stabilizing device 1140 is connected to the second fiber optic sensing device 1142 to provide a predetermined pulling force of the second measuring portion 11422, and then the second measuring portion 11422 is maintained in the first state.

Step 314, applying a strain to the first measurement section 11222 to cause the first measurement section 11222 to transition to a second state. The strain applied in this embodiment is, for example, that the elevation meter 100 is disposed on two bridge piers of a bridge, and when one of the bridge pier heights is changed, in other embodiments, the strain may also be the seam distance caused by the expansion joint. The person caused by the change. In actual measurement, such as 3C In the figure, FIG. 3C is a schematic diagram of an elevation meter disposed on two bridges of a bridge according to another embodiment of the present invention. When the pier 340 sinks, the first acrylic tube 102 also sinks, and therefore, the first all-fiber full bridge bridge safety monitoring integration system 112 is pulled downward. The first fiber optic sensing device 1122 is also pulled downward, causing the first stabilizing device 1120 to simultaneously pull the first fiber optic sensing device 1122.

Since the first acrylic tube 102 and the second acrylic tube 104 are connected by the first communication tube 152, the liquid level maintains the same liquid level, and therefore, the first stabilizing device 1120 is sunk to The volume in the liquid is larger, the depth is deeper, and the buoyancy is greater, thereby also changing the pulling force of the first fiber sensing device 1162. At the same time, the first measurement section 11222 is changed from the first state to the second state, and the reflected signal S2 generates the first signal variation. The first signal processing device 1126 converts the reflected signal S2 that generates the first signal change into a physical parameter, step 316.

Step 322, the first all-fiber full-bridge bridge safety monitoring integration system 112 provides a first communication device 1128. The first communication device 1128 is connected to the first signal processing device 1126. When the reflected signal S2 generates a signal change, the first signal processing device 1126 controls the first communication device 1128 to transmit the warning signal Sw to a use terminal U1, and the warning signal Sw is transmitted to the mobile terminal U1, and then actively informs the bridge in human language. Security status. The first communication device 1128 transmits the warning signal Sw through a wireless network or a wired network. It should be noted that the warning signal Sw is transmitted by means of a short message, an email or a voice message. Figure 3E, It is a schematic diagram of an all-fiber full-bridge bridge safety monitoring integrated system with smart phone voice alarm according to an embodiment of the present invention. Please refer to FIG. 3E. For example, the first communication device 1128 transmits the warning signal Sw to the mobile phone U11 of the bridge manager U1 via the network, and the first communication device 1128 also activates the warning device 350, such as a warning light. , alarm bells or voice alarms to provide warnings for nearby passers-by.

In another embodiment, please refer to FIGS. 4A, 4B, and 4C. FIG. 4A is a schematic diagram of a steel cable vibration frequency monitoring meter according to an embodiment of the present invention. Figure 4B is a schematic view of the steel cable vibration frequency monitoring meter mounted on the steel cable according to Figure 4A. Figure 4C is a schematic view of the steel cable vibration frequency monitor of Figure 4A disposed on a diagonal bridge. As shown, the cable vibration monitor 412 is suspended, for example, on one of the cables 420 of a diagonal bridge 430 for monitoring the vibration frequency of the cable 420. In this embodiment, the structure of the cable vibration frequency monitor 412 is similar to the first all-fiber full bridge safety monitoring integration system 112 in FIG. 1B, and the difference is only in the first stabilization device 1120 in FIG. 1B. A floating device or a styrofoam; and the stabilizing device 4120 of the present embodiment is a styroic cylinder. As shown in FIG. 4A, the stabilizing device 4120 is placed as a counterweight by the circular iron block 4121. In the water 450, the gravity it receives provides a predetermined pulling force of the fiber grating 41224 to maintain the fiber grating 41224 in the first state. One of the heat shrink sleeves 41230 above the fiber grating 41224 is fixed to the support plate 440, and the other lower heat shrink sleeve 41230 is connected to the stabilizer 4120 by the carbon fiber line 41228. In this embodiment, the steel cable vibration frequency monitor 412 is not only a stabilizer Other than the structure other than 4120, the other systems are the same as the first all-fiber full-bridge bridge safety monitoring integration system 112 in Fig. 1B, and therefore will not be described again.

The cable vibration monitor 412 is attached to the cable 420 by a suspension wire 460 as shown in Fig. 4B. When the cable 420 vibrates, the cable vibration monitor 412 vibrates with the cable 420, thus providing a strain of the cable vibration monitor 412 fiber grating 41224. The fiber grating 41224 changes to the second state, which in turn causes a signal change in the reflected signal S2, as shown in FIG. 4A. Subsequently, the signal processing device converts the reflected signal that generates the signal change into a physical parameter (ie, the vibration frequency), and the tension T of the steel cable 420 is obtained by frequency conversion to provide the instantaneous vibration condition of the monitoring cable 420 for real-time measurement. The vibration of any of the steel cables 420 of the inclined bridge 430 is as shown in Fig. 4D. Wherein, the above tension is the cable tension T, and the formula is:

W: steel cable unit length weight

L: cable length

g: gravitational acceleration

f ₁ : steel cable vibration fundamental frequency

For another embodiment, please refer to FIGS. 3D and 5, which are schematic diagrams of a displacement meter according to an embodiment of the present invention. As shown, one end of the displacement meter 512 is connected to point B via a stabilizing device 5120 via a wire 520, and the other end is connected to point A through a fiber 51220, and is measured by a displacement meter 512. The displacement of two points A and B. In this embodiment, the structure of the displacement meter 512 is similar to the first all-fiber full bridge bridge safety monitoring integration system 112 in FIG. 1B, except that the first stabilizing device 1120 is a floating device or a styrofoam. The stabilizing device 5120 of the present embodiment is a buffer device or a spring for providing a predetermined pulling force of the measuring section by elastic force to provide buffering thereof, so that the measuring section 51222 is maintained in the first state. The structure of the displacement meter 512 except the stabilizing device 5120 in this embodiment is the same as that of the first all-fiber full-bridge bridge safety monitoring integrated system 112 in FIG. 1B, and therefore will not be described again.

When the displacement between the two points A and B changes, the measuring section 51222 of the displacement meter 512 is pulled, is subjected to a strain, and thus changes from the first state to the second state, thereby generating a signal change in the reflected signal S2. Subsequently, the signal processing device converts the reflected signal that generates the signal change into a physical parameter (ie, displacement) to provide an instantaneous displacement amount for monitoring two points A and B, not shown. This embodiment can be used for the monitoring of the bridge expansion joint 348. When the seam distance of the expansion joint 348 is large, the measuring section 51222 of the displacement gauge 512 is pulled, subjected to a strain, and the bridge is safely monitored, such as 3D illustration.

Please refer to FIGS. 6A and 6B. FIG. 6A is a schematic diagram of a water level gauge according to an embodiment of the present invention. Figure 6B is a schematic view of a water level gauge placed on a bridge according to Figure 6A. The water level gauge 612 has a stabilizing device 6120, an optical fiber 61220, a hanging line 620, a measuring section 61222, and a probe 650. Measurement section 61222 includes a grating 61224. The measurement section 61222 is adhered to the probe 650. Hanging line 620 is hung from the guardrail 660 of the bridge and down Hanging, a gravity is provided by the stabilizing device 6120 to stabilize the measuring section 61222. The distance between the probe 650 and the water surface of the river 664 may be determined according to the warning water level set by the user. When the water level of the river 664 rises, the measuring section 61222 of the water level gauge 612 is subjected to a strain by which the wavelength of the grating 61224 is measured to know when it touches the water surface, as shown in Fig. 6C, and a warning is issued.

The above-mentioned all-fiber full-bridge bridge safety monitoring and integration system uses the grating inside the optical fiber as a measurement, and senses the variation of the physical quantity by sensing the variation of the reflected signal, and is used as an elevation meter and a displacement meter for measuring the civil structure of the bridge. And the vibration frequency monitor. The all-fiber full-bridge bridge safety monitoring and integration system of the present invention can also be used as the other all-fiber full-bridge bridge safety monitoring and integration system. The description in the present invention is merely illustrative and not limited thereto.

The above is only the preferred embodiment of the present invention, and is not intended to limit the scope of the present invention; all other equivalent changes or modifications which are not departing from the spirit of the present invention should be included in the following. Within the scope of the patent application.

100‧‧‧height

102‧‧‧First Acrylic Tube

104‧‧‧Second Acrylic Tube

112‧‧‧First all-fiber full-bridge bridge safety monitoring and integration system

1120‧‧‧First Stabilizer

1121‧‧‧ round iron

1122‧‧‧First fiber optic sensing device

11220‧‧‧First fiber

11222‧‧‧First measurement section

11224‧‧‧First measuring device

11226‧‧‧First tube device

11228‧‧‧First cable

11230‧‧‧First heat shrinkable casing

1124‧‧‧First optical device

1126‧‧‧First signal processing device

1128‧‧‧First communication device

1129‧‧‧First coupler

114‧‧‧Second all-fiber full-bridge bridge safety monitoring and integration system

1140‧‧‧Second stabilizer

1142‧‧‧Second fiber sensing device

11420‧‧‧second fiber

1141‧‧‧ round iron

11422‧‧‧Second measurement section

11424‧‧‧Second measuring device

11426‧‧‧Second tube device

11428‧‧‧Second cable

11430‧‧‧Second heat shrinkable tube

S1‧‧‧Optical signal

S2‧‧‧Reflected signal

Sw‧‧‧ warning signal

U1‧‧‧Usage

122‧‧‧First fixed end

124‧‧‧Second fixed end

152‧‧‧First connecting pipe

302~324‧‧‧Method

340, 342‧‧ ‧ pier

344, 346‧‧ ‧ bridge deck

348‧‧‧ expansion joint

412‧‧‧Steel cable vibration frequency monitor

4120‧‧‧Paulilong cylinder

4121‧‧‧ round iron

4122‧‧‧Fiber sensing device

41222‧‧‧Measurement section

41224‧‧‧ fiber grating

41220‧‧‧Fiber

41226‧‧‧tube device

41228‧‧‧carbon fiber line

41230‧‧‧Heat Shrink Tubing

420‧‧‧Steel cable

430‧‧‧ diagonal bridge

440‧‧‧support board

450‧‧‧ water

460‧‧‧ hanging wire

512‧‧‧displacement meter

5120‧‧‧stabilizer

51220‧‧‧Fiber

51222‧‧‧Measurement section

51224‧‧‧Measurement device

51226‧‧‧tube device

520‧‧‧Steel wire

612‧‧‧Water level gauge

6120‧‧‧ Stabilizer

61220‧‧‧Fiber

61222‧‧‧Measurement section

61224‧‧‧Raster

620‧‧‧ hanging line

650‧‧‧ probe

660‧‧‧ guardrail

664‧‧‧ River water

W‧‧‧Steel cable unit length weight

L‧‧‧ cable length

G‧‧‧gravity acceleration

f ₁ ‧‧‧Steel cable vibration fundamental frequency

1A is a schematic diagram of an elevation meter according to an embodiment of the present invention; FIG. 1B is a schematic diagram of an all-fiber bridge full bridge safety monitoring integration system according to the elevation meter of FIG. 1A; FIG. 1C is a diagram according to the present invention; A schematic diagram of an elevation meter of another embodiment of the invention.

Figure 1D is a schematic diagram of an all-fiber full bridge bridge safety monitoring integrated system according to the 1C chart elevation meter.

2A is a schematic diagram of an elevation meter according to another embodiment of the present invention; FIG. 2B is a schematic diagram of an elevation meter according to another embodiment of the present invention; FIG. 3A is a diagram of an embodiment of the present invention Example of a sensing method flowchart; FIG. 3B is a schematic diagram of an elevation meter disposed on two bridges of a bridge according to another embodiment of the present invention; FIG. 3C, an elevation meter according to another embodiment of the present invention FIG. 3D is a schematic view of an expansion joint applied to a bridge according to another embodiment of the present invention; FIG. 3E is a diagram showing a smartphone voice according to an embodiment of the present invention. FIG. 4A is a schematic diagram of a vibration frequency monitoring instrument of a steel cable according to an embodiment of the present invention; FIG. 4B is a steel cable according to FIG. 4A The schematic diagram of the vibration frequency monitoring meter is hung on the steel cable; the fourth embodiment is a schematic diagram of setting the steel cable vibration frequency monitoring meter of the 4A diagram to a diagonal bridge; 4D is a vibration frequency diagram measured by a steel cable vibration frequency monitor of FIG. 4A; FIG. 5 is a schematic diagram of a displacement meter according to an embodiment of the present invention; FIG. 6A is a diagram according to the present invention A schematic diagram of a water level gauge of one embodiment; and a schematic diagram of a water level gauge according to FIG. 6A disposed on a bridge; and FIG. 6C is a grating wavelength diagram measured according to a water level gauge of FIG. 6A.

302~324‧‧‧Method

Claims (6)

A sensing method includes the steps of: (a) providing a stabilizing device, a fiber sensing device, an optical device, and a signal processing device; (b) providing an optical fiber, two heat shrink sleeves, and a cable The fiber sensing device, and the at least one measuring device is formed on at least one measuring section of the optical fiber, wherein the two ends of the cable are mutually engaged by the heat shrinkable sleeve opposite to the optical fiber, the measuring section Located between the heat shrinkable sleeves, one end of the cable is connected to the stabilizing device, and the heat shrinkable sleeve is a fixed end with respect to the stabilizing device; (c) coupling the optical device to the fiber optic sensing One end of the device, wherein the optical device emits an optical signal into the optical fiber, and the optical device receives a signal reflected by the measuring portion to reflect the optical signal; (d) coupling the signal processing device to the optical device (e) connecting one end of the stabilizing device to the other end of the fiber sensing device to provide a predetermined pulling force of the measuring segment, the measuring segment is maintained in a first state; (f) the measuring region Segment application In order to convert the measurement section into a second state, when the measurement section is in the second state, the reflection signal generates a signal change; and (g) the signal processing device is to generate the signal change The reflected signal is converted to this physical parameter. The sensing method of claim 1, wherein the measuring device is a grating. The sensing method of claim 1, wherein the stabilizing device is a floating device or a styrofoam, and the other end of the stabilizing device is connected to the cable of the optical fiber sensing device, and the stabilizing device provides A buoyancy force to the cable, the measurement section of the optical fiber being subjected to the predetermined pulling force to maintain the measurement section in the first state. The sensing method of claim 1, wherein the all-fiber full-bridge bridge safety monitoring and integration system further provides a communication device, wherein the communication device is connected to the signal processing device, and when the reflected signal generates the signal change The signal processing device controls the communication device to transmit an alert signal. The sensing method of claim 4, wherein the communication device transmits the warning signal by using a wireless network or a wired network. The sensing method of claim 5, wherein the warning signal is transmitted to the user by way of a short message, an email, or an audio message.