KR100291852B1 - Device and method for automatically measuring displacement amount of inclination by using serial communication - Google Patents

Abstract

PURPOSE: An automatic measuring device and method of an inclination displacement amounts are provided to automatically measure many inclination displacement amount through a serial communication method by converting horizontal underground displacement amounts inside the ground and to permanently measure the inclination displacement by installing many measuring sensors in many measured positions permanently. CONSTITUTION: Many inclination sensors output many inclination displacement amounts corresponding to each inclination displacement by installing many measured positions. Many signal converting units(20) converts signals from the inclination sensors to digital signals and transmits the digital data through a serial communication method when an own address is called. A sensor control unit(25) designates the data transmission to the signal converting units, receives the converted data and controls the transmission and receiving of the data sequentially. A main computer(27) receives and analyzes the data.

Description

Automatic device for measuring tilt displacement using serial communication and its method

The present invention relates to an automatic inclination measuring device and a method for automatically measuring the inclination displacement by controlling a plurality of inclination sensors by serial communication, in particular, the field for measuring in detail the inclination displacement of underground soil, that is, the horizontal horizontal displacement Applied to the automatic measuring device and the method of measuring the displacement of displacement using a serial communication which embeds a narrow and long inclinometer in the basement and inserts a plurality of inclination sensors at a certain depth into the underground and automatically controls and measures the sensor. It is about.

In general, in civil engineering works such as roads, bridges, ports, and dams, it is necessary to measure and manage the amount of inclination displacement of various structures and ground caused by the influence of ground behavior, wind power, and vibration.

The conventional method of measuring underground horizontal displacement in civil engineering, that is, the amount of inclined displacement caused by the ground, can be measured manually by manually inserting a probe with a tilt sensor at the end of a tape measure into a plastic tilt gauge. It was a cumbersome task that required personnel.

As described above, a typical inclination displacement measuring method for measuring underground horizontal displacements, which are commonly used in civil construction sites, will be described with reference to FIG. 1.

Take the measuring cable 13 marked with depth in 0.5 meter length from the cable storage drum 14 and insert the measuring probe 11 with the tilt sensor at its end into the 50 mm wide plastic inclinometer 12 (3B, 31 and 32) and insert the roller wheel 10 into the unit by 0.5 meters by hand while at the same time measuring the slope of the ground according to the depth while pressing the instrument logger 15 with one hand.

Since the measuring equipment has a cable length of 50 meters or more, it can not be lifted by one hand because of its heavy weight.

The conventional measurement method, which is a little more improved than the conventional method, may be performed by inserting a plurality of inclination sensors made in the same shape as the conventional probe 11 into the inclination tube 12 in a line by measurement depth. In this case, as shown in Fig. 4B, the signal lines 41 of each sensor are all gathered in one place and concentrated on the measuring device 40, so that the line is very complicated and wiring is difficult.

Since many such lines must pass through the inclined tube 12 having a narrow diameter of 50 millimeters, there is a limit of the quantity of the inclined measuring probe 11 into the inclined tube, and the price is very high. More specifically, since six lines 41 are provided per sensor, 120 signal lines are provided even when 20 inclination sensors are installed, and thus the number of installation of the sensors cannot be continuously increased as necessary.

Such conventional techniques have many limitations and limitations in measuring tilt displacement in civil engineering.

As mentioned above, in the field of civil engineering measurement of the conventional inclination displacement amount, in spite of the urgent need for automatic control and high precision measurement in view of various working conditions, it still relies on the conventional low-precision manual measurement of the conventional method.

The technical problem to solve this problem is to reduce the control line and to digitize the output signal of the sensor in the sensor itself to configure the system suitable for the measurement work conditions for inclined measurement automation, and the measurement data to the main communication It's a technology that delivers to a computer.

The present invention has been made in view of the above-described problems of the prior art, the purpose of which is to convert the underground horizontal displacement amount of a large number of points in the ground that can occur when excavating the underground for civil engineering-related construction into an electrical signal In addition, the present invention provides a device for automatically measuring tilt displacement, which can measure a large number of tilt displacements remotely by a serial communication method.

Another object of the present invention is to permanently measure the change in the slope of the civil engineering structure due to the natural environment or poor construction of the exterior, not time-limited, permanently fixed to a plurality of measuring sensors at a plurality of measuring points of the measurement site, Using the serial data communication line, the slope measurement of the structure is automatically measured in the office, and it is possible to measure the displacement of the slope automatically until the structure is permanently used, regardless of the measurement time and place. To provide.

1 is a schematic cross-sectional view showing a conventional manual tilt displacement measuring device,

2 is a schematic cross-sectional view showing an automatic device for measuring the amount of inclination displacement according to the present invention;

3A is a schematic diagram of the guide for inserting a tilt sensor into an inclinometer;

3B is a cross-sectional view of the inclinometer with guide grooves,

Figure 4A is a block diagram connecting the inclination sensor according to the present invention,

4B is a schematic diagram of a track connecting the inclination sensor conventionally;

5A is a detailed block diagram of an inclination sensor signal converter according to the present invention;

5B is a detailed block diagram of a sensor controller according to the present invention;

6A is a flowchart of a signal conversion unit shown in FIG. 5A;

6B is a flow chart of the sensor controller shown in FIG. 5B;

7A is a serial communication protocol for transmitting to a sensor signal converter;

7B is a serial communication protocol received by a sensor controller.

(Explanation of symbols for the main parts of the drawing)

10; Rolla wheel 11; Probe

12; Inclinometer tube 13; Measuring cable

14; Cable drum 15; Manual measuring instrument

20; Signal converter 21; Connecting rod

22; Spring plates for guides 23; Guide protrusion

24; Serial sensor measuring line 25; Sensor control unit

26; Serial main communication line 27; Main computer

30; Spring plate projections 31,32; Inclinometer Home

40; Conventional instruments 41; Conventional signal line

42,53; Inclination sensor 50; A / D converter

51; Microprocessor for conversion 52; RS-485 converter

53; Display panel (L C D) 54; Microprocessor for control

55; Memory 56; Nonvolatile Memory (EEPROM)

57; Serial Transceiver Driver

In order to achieve the above object, the present invention, the inclination tube for inserting the inclination sensor into the basement, the sensor connecting rod for positioning the sensor at regular intervals into the inclination system, and picking up the connecting rod along the groove inside the inclination system A guide attached to the connecting rod for input, a signal conversion means for transmitting data converted from the inclination sensor to digital, and a serial communication method, a sensor control means for receiving and storing this data in serial, and It provides a device for automatically measuring the displacement amount of displacement, characterized in that consisting of a main computer for receiving and analyzing the measurement data and information.

According to another aspect of the present invention, the present invention provides a method for automatically measuring tilt displacement using a tilt gauge, a tilt sensor, a sensor connecting rod, a signal converter, a sensor controller, a main computer, etc. Instructing each signal converter to A / D conversion of the inclination sensor by the serial communication protocol method, and the signal converter waiting for monitoring the serial communication line always recognizes its own address and performs A / D conversion. Transmitting digital data to the signal control unit through the serial communication method; storing the data collected by the serial communication method; displaying information such as measurement time and stored state on the display panel; and transmitting the collected data to the main computer. And, it analyzes the data in the main computer received and plotted and characterized Provides a method for automatically measuring the amount of inclination displacement.

According to the present invention, the main computer is located in the office and can perform automatic measurement unattended, and the modem can be connected to the remote central computer communication network, so that the measurement data processing is more rapid regardless of time and place. And convenient.

(Example)

Hereinafter, with reference to the accompanying drawings showing a preferred embodiment of the present invention described above in more detail.

2 is a schematic cross-sectional view showing an apparatus for automatically measuring a displacement amount according to the present invention, FIG. 3 is a configuration diagram of a line connecting the inclination sensor, FIG. 4 is a schematic diagram for inserting the inclination sensor into the inclination system, and FIG. Detailed block diagram for the signal conversion and sensor control unit according to the invention, Figure 6 is a flow chart of the control circuit shown in Figure 5, Figure 7 is a serial communication protocol between the sensor signal conversion unit and the sensor control unit.

First, the operation flow of each part of the present invention will be briefly described. When the inclination tube 12 embedded in the ground is inclined with the ground, there is a change in the output voltage of the inclination sensor 53 in the inclination system, and the signal is digital. The sensor control unit 25 arrives and is stored as a digital signal via a signal conversion unit 20 having a built-in inclination sensor. The sensor control unit collects inclination displacement data of all sensors and sends them to the main computer 27 via RS-232 communication. Therefore, this measurement data can be analyzed and informed on the main computer. The inclination sensor 53 may use the well-known inclination sensor 42 or the inclination sensor proposed by the present applicant as the patent application No. 97-18936, "An inclination angle transducer using the capacitance of a bridge circuit and its method." have.

Then, referring to FIG. 2 as an installation example, the quantity of the measurement point is selected for the signal conversion unit 20 in which the inclination sensor 53 is incorporated, and a predetermined distance (about 0.5-2 meters) is provided therebetween. The connecting rod 21 is connected between the signal conversion units 20 to maintain the installation depth of the gap, and the signal line 24 is connected to the last sensor unit through the inside of the connecting rod. Typically, the total length of this connection is about 20-30 meters, although it varies slightly between civil sites.

When assembled as described above, the guides (Figs. 3A, 23 and 30) are matched with the grooves (Figs. 3B, 31 and 32) of the plastic inclined tube 12 having a diameter of about 50 millimeters and pushed to the end of the inclined tube and the inclined tube lid ( 28) Close and seal.

The signal line 24 from this inclination tube is connected to the sensor control part 25, and the data line 26 from the control part is connected to the main computer 27, and a system is completed.

When the system is applied to civil engineering structures, the sensor signal converter 20 may be separated and attached to measurement points at regular intervals, thereby simplifying configuration.

The guides 22, 23, and 30 for inserting the inclination sensor signal converter 20 into the inclination tube 12 will be described in more detail with reference to FIG. 3.

The guide has two groove supporting protrusions 23 of 4 millimeters in width and 120 millimeters apart so as to descend along the inclination tube grooves (FIGS. 3B and 31). On the opposite side, the spring iron plate 22 having a width of 4 millimeters and a length of 120 millimeters is pushed so that the protruding portion 30 slides in close contact with the groove 32. This guide system, once installed, can be said to be much more stable than conventional roller wheels 10 that must be moved from time to time as a feature of the present invention, which is permanently and automatically measured.

In addition, by connecting the connecting rod 21 and the inclination sensor signal conversion unit 20 that follows, in order to ensure that the movement does not move to make a screw thread at the end of the connecting rod 21, or fixed with a fixing pin All installed tilt sensor signal converters can also be tilted together. However, the length of the connecting rod 21 is set to the same length (about 0.5 m or less) as the manual measuring probe 11 so as to be able to flexibly move back, forth, left and right as in manual measurement, and the connecting portions are joined to each other in a round spherical shape, respectively. The sensor may be connected to the inclination sensor signal converter 20 to move easily.

The serial communication method, which is a representative feature of the present invention, will be described below with reference to FIG. 4. Unlike the conventional method, this method can be configured simply by two lines 24 coming out of the sensor control unit 25. These two lines adopt the RS-485 communication method and the communication distance is several kilometers.

RS-485 communication supports multi-point mode. Multi-point refers to a standard that allows multiple devices to be connected to one line, each device is assigned a unique address, and then a host can transmit and receive a desired device.

In order to apply the method, a sensor signal conversion unit (FIGS. 5A and 20) capable of A / D conversion (Analog to Digital Conversion) of each inclination sensor 42 and a digitalization of the inclination displacement amount to manage serial communication is required. Do. This serial communication system can realize high-precision civil engineering measurement that could not be realized by the conventional system that requires many lines 41 as shown in FIG. 4B.

Referring to Figure 5 when explaining the inclination amount automatic measuring apparatus using serial communication as follows.

FIG. 5A illustrates an inclination signal converter 20 incorporating an inclination sensor 53 and digitally converting a signal. When a DC voltage is applied to the inclination sensor 53, a voltage change occurs according to a change in inclination. In order to send to the sensor control unit 25 in the serial communication, the A / D converter 50 is passed through, and the microprocessor 51 receives the conversion data and the RS-485 converter 52 in accordance with the serial communication protocol for RS-485 communication. The data is transmitted to the sensor controller 25 through.

FIG. 5B is a sensor controller 25 which controls each inclination sensor signal converter 20 located inside the inclination tube 12 to comprehensively receive inclination displacement data, which is received through the RS-485 converter 52. When data is sent to the microprocessor 54, the reception status is displayed on the display screen 53, the displacement amount of each sensor received in the memory storage device 55 is stored, and the sensor address and communication in the nonvolatile memory 56 are stored. Store constant data such as specifications.

In addition, information is exchanged with the main computer 27 through the serial transmission / reception driver 57 in an RS-232 manner.

FIG. 6 is a flowchart illustrating a control program of the microprocessor 51 in the sensor signal converter 20 and the microprocessor 54 in the sensor controller 25.

FIG. 6A is a flow chart of a macro processor of a signal conversion unit. In detail, when the power is supplied and the operation is started, the inclination sensor for the sensor data transmission request from the sensor control unit while the RS-485 communication port is in the standby state for input. If it is confirmed that the call signal has been applied or not, the standby state is repeatedly maintained (step S61). If there is a call signal, it is checked whether it is my sensor address (step S62). If the inclination sensor displacement amount request of the My Address is performed, the A / D conversion operation is performed (step S63). The converted data is stored in the memory (step S64), the data is transmitted by RS-485 communication (step S65), and the operation is terminated after confirming the data reception completion signal of the control unit. In order to save transmission and reception time, the confirmation operation may be omitted.

6B is a flow chart of the macro processor of the sensor controller, which will be described in detail. When power is supplied to the controller and the operation is started, the RS-485 communication port is in an input state and waits for a controller call signal from the sensor signal converter. Step S67). If there is a control unit call signal, the transmission sensor address checking operation is performed (step S68). After the verification operation, the reception data and measurement time are stored in the memory (step S69), the reception completion data is sent out (step S70), the reception status is displayed on the display screen LCD (step S71), and measurement of all installed sensors is performed. Upon completion, data transfer operation is performed to the main computer (step S72).

7 illustrates a serial communication standard (protocol) between the sensor signal converter 20 and the sensor controller 25. This is described as follows.

FIG. 7A is a protocol for calling a signal converter of a sensor measured by a sensor controller, the first 16 bits of which transmits two characters (ASCII) in ASCII code as a signal for calling a tilt sensor, and then a received sensor. Send 8 bits of address number. The following 8 bits are the inverted signals inverting the sensor address, that is, 1 is 0 and 0 is 1, which is a signal for preventing transmission / reception errors and may be omitted to save transmission / reception time.

7B is a protocol for transmitting the measurement result data from the sensor signal conversion unit to the sensor control unit. The first 16 bits are signals for calling the sensor control unit, and transmit two characters (ASCII) in ASCII code, and then transmit sensor address. The number 8 bits and the inverted 8 bits are sent in succession. The next data is the four digits of the measurement result, a total of 32 bits of data, followed by an invert signal. Again, the inverted signal may be omitted to save transmission and reception time.

For example, if the transmit / receive signal is expressed in ASCII code, it can be expressed as follows. That is, the sensor transmission code of FIG. 7A may be expressed as “SN 01 FE”, and the gradient result receiving code of FIG. 7B may be expressed as “MH 01 FE 31 32 33 34 AE AD AC AB”.

As described above, in the present invention, the construction of civil engineering sites and underground soils, that is, in the horizontal horizontal displacement measurement, free from manual conventional civil measurement, enables fully automated information construction and civil measurement.

Briefly, the effect of the invention is described as follows.

As a first effect, the control line from the tilt sensor is reduced to only 2 lines from the conventional method, which required at least dozens of lines, so that accurate measurement can be made automatically using many sensors even in the field where there was no installation space. .

Second, since the A / D conversion of the inclination displacement is converted to digital signal by outputting A / D at the stage immediately after the sensor signal, it is generally more accurate and lossless than the conventional method of dragging a line over 30 meters and converting the signal. have.

Third, the individual inclination sensor can be made small, and the built-in conversion control circuit is built in, so that additional equipment such as a roller wheel for manual measurement is unnecessary, so that it can be manufactured at a low price, and the installation is simple and costly. Very savings.

Fourth, it is not the conventional method to measure while moving the measuring instrument with tilt sensor. It can be installed as a measuring facility fixed in one place, so it can be installed for a long time and is suitable for permanent safety inspection of civil engineering structures.

Fifth, by being fixedly installed at the measurement point, the measurement error caused by measuring and inclined displacement amount by measuring and moving once and then moving again at the next measurement time can be reduced.

In addition, as a last effect, the measurement time is shortened automatically because it is measured at a long distance, and labor costs are saved because there is no need for a separate measurement personnel, and a larger effect is that the current measurement data is quickly input into a computer, which enables information-based measurement management. Innovative contributions to civil engineering surveys can be made.

In the above, the present invention has been illustrated and described by way of specific preferred embodiments, but the present invention is not limited to the above-described embodiments, and the general knowledge in the technical field to which the present invention pertains falls within the scope of the present invention. Various changes and modifications will be possible by those who have

Claims (6)

A plurality of inclination sensors installed at the plurality of measurement sites and outputting a plurality of inclination displacements corresponding to the inclination displacements of each of the measurement units; A plurality of signal converting units converting the inclination displacement signals from the plurality of inclination sensors into digital, and transmitting the digital conversion data through a serial communication method when its address is called; Sensor control means installed at a remote location from the plurality of signal conversion units to sequentially specify measurement data transmission to a plurality of signal conversion means, receive and store the converted measurement data in serial, and control transmission / reception of measurement data; And a main computer configured to receive, analyze, and inform the measurement data from the sensor control means. The apparatus of claim 1, wherein the sensor control means and each signal converter are connected to a serial communication line to collect data in a multi-point manner. The apparatus of claim 1, wherein the plurality of inclination sensors are inserted into a plurality of inclinometers embedded in the ground to generate a horizontal displacement measuring signal of each part of the ground. 4. The projection and support of claim 3, wherein each of the inclination sensors is attached to the inclination sensor side or the connecting rod side connecting to maintain the inclination sensor at regular intervals so that the inclination sensor fits in the groove in the inclination tube. Slope displacement automatic measuring device further comprising a spring plate for. A plurality of inclination sensors which are provided at a plurality of measurement sites and whose output signals change according to the amount of inclination displacement corresponding to the inclination displacement of each of the measurement units; An A / D converter for converting a tilt displacement signal output from the plurality of tilt sensors into a digital signal; Control means for controlling the A / D converter, storing the converted data, and controlling remote transmission / reception of data; A tilt displacement detection / conversion circuit, comprising: a serial converter for transmitting and receiving data to and from a remote main computer or other storage device. At least one inclination sensor for measuring underground horizontal displacement, at least one inclination tube for embedding the sensor, at least one sensor connecting rod, at least one signal conversion unit, the sensor control unit and the main computer for analyzing the measurement data In the method of automatically measuring the amount of inclination displacement of the device for measuring the amount of inclination displacement, Instructing the inclination displacement measurement and the A / D conversion operation by the inclination sensor to each signal conversion unit by a serial communication protocol method in the sensor control unit; A signal conversion unit which monitors and waits for the serial communication line at all times, recognizes its own address, performs A / D conversion, and transfers the converted digital data to the sensor control unit through a serial communication method; Storing data collected by the sensor controller through a serial communication method, displaying information such as a measurement time and a stored state on a display panel, and transmitting the collected data to a main computer; A method for automatically measuring tilt displacement, characterized in that the data is analyzed, plotted, and informed by the transmitted main computer.