JPH02107911A - Inclination monitoring system - Google Patents

Abstract

PURPOSE:To enable monitoring of an inclination of an erected body at a low cost by detecting the inclination thereof with an inclination transmitter to be transmitted through a stringing. CONSTITUTION:A silicon substrate 101 is hollowed at the center thereof leaving a weight part 103 and a strain gauge circuit 104 is provided on the top of a beam section 102 to build a semiconductor acceleration sensor as inclination sensor 1. Then, an inclination transmitter 304 is made up of the sensor 1 and a processing circuit 2 and is placed on an electric post 301. Then, a drive current is supplied through a constant current circuit 4 from an external power source 3 to detect an inclination of the electric post 301. An inclination detection signal of the sensor 1 is inputted into an operational amplifier 12 of an offset circuit 11 through an amplification circuit 8 and then, an output of the amplifier 12 is inputted into a current modulation circuit 14. Thus, the inclination signal is transmitted to a telephone line 302 through a signal line l3 and can be monitored with a telephone station 303.

Description

[Detailed Description of the Invention] <Industrial Application Field> The present invention detects the inclination of an erected structure such as a utility pole or a steel tower, on which overhead wires are installed, to prevent accidents and dangers, and to perform various types of management. The present invention relates to a tilt monitoring system for carrying out.

<Conventional technology> Conventionally, in the case of erected objects such as telephone poles and steel towers,
Over time or suddenly due to aging, disasters, or poor soil conditions, the structure may tilt significantly and become dangerous.

Therefore, it is absolutely necessary to accurately understand and maintain such phenomena in order to prevent disasters and the like.

<Problems to be Solved by the Invention> However, up to now, for the above-mentioned upright structures, detection and management of inclination has hardly been performed.

This is because attitude control is currently implemented in high-grade control systems such as aircraft and rockets, but in these cases it is indispensable even without considering the cost. In the case of the above-mentioned utility poles, steel towers, and other erected structures, there are currently no suitable slope angle transmitters available for installation, and the installation of signal lines is required, among other reasons. It will be done.

The present invention has been made in view of the above-mentioned conventional circumstances, and its purpose is to provide a simple inclination angle transmitter and to reduce costs by using the overhead wire itself of the erected structure. We do not intend to provide a slope monitoring system for this purpose.

<Means for Solving the Problems> The inclination monitoring system of the present invention achieves the above object by installing an inclination angle transmitter on an erected structure on which an overhead wire is installed, and transmits the detection signal to the erected structure. It is transmitted to the management station via overhead wires for monitoring. The tilt angle oscillator is a small, low-cost device manufactured using semiconductor manufacturing technology.
Furthermore, it uses a simple one-dimensional or multidimensional acceleration sensor that is easy to handle.

<Operation> In this tilt monitoring system, the tilt angle transmitter accurately detects the inclination of the erected structure, and this detection signal is transmitted through the overhead wire of the erected structure. Therefore, the inclination of the erected structure can be monitored at low cost.

<Embodiment> FIG. 1 shows an embodiment of the tilt monitoring system according to the present invention.

In the figure, 301 is a telephone pole as an upright structure, and a telephone line 302 is laid as an overhead wire between the poles 301 and 301. This telephone line 302 is connected to a telephone office 30 at an appropriate location.
Drawn to 3. In the present invention, for example, this telephone station 3
03 will be used as the management station.

A tilt angle transmitter 304 is installed on the utility pole 301, as shown in FIG. 2, for example.

The internal configuration of this tilt angle transmitter 304 is as shown in FIG. 3, and includes a tilt angle detection sensor installed on the utility pole 301,
Processing circuit 2 that processes the detection signal from this detection sensor 1
It consists of

The main oblique angle detection sensor 1 detects the electric pole 301 due to the action of gravity.
In principle, any device that can detect the inclination of the sensor can be used, but it is preferable to use a semiconductor acceleration sensor made of silicon as shown in FIG. 4, for example. This acceleration sensor 1, for example,
A weight section 103 extending through the beam section 102 is hollowed out to allow free movement of the weight section 103, and a strain gauge circuit 104 is provided on the top surface of the beam section 102, etc., so that when the utility pole 301 is tilted, The inclination is detected by the movement of the weight section 103. If this is manufactured using recent semiconductor manufacturing techniques, an extremely small and simple semiconductor element can be obtained.

As is clear from FIG. 3, this tilt angle detection sensor 1 uses an external power source 3, for example, power for driving a telephone, and connects a power supply line I! from telephone lines 302 and 302. , I~2, and diode 5, voltage regulator diode 6, operational amplifier 7
A drive current is supplied through a constant current circuit 4 consisting of the following. Note that this external power source 3 may be replaced by a device system that combines a solar cell (for daytime power supply and power storage) and a storage battery (for nighttime power supply) that are substantially directly connected to the sensor chip.

The tilt angle detection signal from the tilt angle detection sensor 1 is amplified by an amplifier circuit 8 consisting of an operational amplifier 9 and an operational amplifier 10, and this amplified signal is input to an operational amplifier 12 of an offset circuit 11. In this offset circuit 11, for example, the variable resistor 13 adjusts the output of the utility pole 301 when it is normal (when it is not tilted) to an appropriate value. This offset circuit 1
The output from the operational amplifier 12 of No. 1 is output as a proportional value corresponding to the inclination of the utility pole 301, and is input to the base of the transistor 15 of the current modulation circuit 14.
An inclination angle signal (such as a danger signal) corresponding to the inclination of
Signal line! 3 to the negative telephone line 302, for example. The tilt angle signal transmitted by this telephone line 302 is monitored at a telephone office 303. In addition, when the detection sensor 1 is installed on a large number of utility poles 301, it is preferable to incorporate appropriate discrimination means into the inclination angle transmitter 304 and the central office side device.

Since the inclination angle transmitter 304 having one inclination angle detection sensor 1 can only detect the inclination of the utility pole 301 in one direction, it is more preferable to install a plurality of inclination angle detection sensors 1 in different directions or to install multiple inclination angle detection sensors 1 in different directions. It is preferable to use a multidimensional distortion detection sensor that can detect dimensional distortion.

An example of the tilt angle transmitter 304 having two built-in tilt angle detection sensors is shown in FIG. This case is basically the same as the case in Figure 3 above, but
Two circuits are provided corresponding to the two inclination angle detection sensors IA and IB, and the inclination angle signals from the rain detection sensors IA and IB are calculated by the calculation circuit 16.
The magnitude of the slope of 01 and its directional component are determined. And these two components are connected to the current modulation circuit 14.14 and the signal line! 8,! 3' to telephone lines 302 and 302, and is monitored at the telephone office 303.

In addition, the tilt angle transmitter 304 uses a multidimensional strain detection sensor, for example, a two-dimensional one, as a tilt angle detection sensor.
An example of this is shown in FIG. In this case, the procedure is basically the same as the case shown in Fig. 5 above, but the two
As the dimensional distortion detection sensor IC, a semiconductor two-dimensional acceleration sensor having a structure as shown in FIG. 7, for example, is preferable.

This detection sensor IC has a diaphragm disk 202 formed by, for example, providing a recess on the bottom side of the center of a silicon substrate 201, etc., and a weight portion 203 is suspended from the bottom surface of this diaphragm disk 202. In addition to freeing the movement of the section 203, strain gauge circuits 204, 204, and 205 are installed at multiple locations such as on the top surface of the diaphragm board 202.
．． 205 is provided. This strain gauge circuit consists of a pair of circuits 204.204 or 205.205 facing each other.
It is best to arrange them so that they are perpendicular to each other.

If this is manufactured using recent semiconductor manufacturing techniques, an extremely small and simple semiconductor element can be obtained.

In this sensor IC, the weight part 103 is attached to the utility pole 301 in a hanging manner, and when the utility pole 301 is tilted, the weight part 1
The two-dimensional inclination of the utility pole 301 can be detected by the two-dimensional distortion of the diaphragm board 202 due to the movement of the electric pole 301.

This two-dimensional inclination is determined by each pair of strain gauge circuits 1
It is processed by two circuit systems corresponding to 04.104 and 105.105, and as in the case of FIG.
' to the telephone lines 302, 302 and monitored at the telephone office 303.

Note that in the above embodiment, the erected body is the utility pole 301, but the present invention is not limited to this. Further, the signal processing circuit 2 of the present invention is not limited to those of the above-mentioned embodiments, and may be any other circuit as long as it transmits some kind of signal to the outside in response to a detection signal from a sensor. I don't mind.

<Effects of the Invention> As is clear from the above description, according to the present invention, the inclination of an erected structure such as a utility pole or a steel tower on which overhead wires are installed can be detected using a small and low-cost inclination angle transmitter that is easy to employ. , the overhead lines themselves can be used to provide a low-cost slope monitoring system that can be easily monitored.

With this tilt monitoring system, it is possible to detect the collapse of an erected structure, prevent serious damage or danger, and speed up effective countermeasures. In addition, the automation of the monitor provides various benefits, such as reducing the labor costs traditionally required by maintenance personnel and eliminating difficult-to-reach locations (mountains and hilly areas under snow cover, etc.).

[Brief explanation of the drawing]

Fig. 1 is a schematic explanatory diagram showing one embodiment of the inclination monitoring system according to the present invention, Fig. 2 is a perspective view showing the installation state of the inclination angle transmitter on an upright structure, and Fig. 3 is the above-mentioned inclination. A wiring diagram showing an example of an angle transmitter, Fig. 4 is a partially cutaway perspective view showing an example of an inclination angle detection sensor, and Figs. 5 and 6 show other examples of the above-mentioned inclination angle transmitter. Each connection diagram and FIG. 7 are partially cutaway schematic perspective views showing an example of a two-dimensional strain detection sensor. In the figure, 301... Erected body, 302... Overhead line, 303... Management station, 304... Tilt angle transmitter, 1, LA-C... Sensor, Patent applicant Fujikura Electric Wire Co., Ltd.

Claims (2)

[Claims] (1) A tilt monitoring system in which a tilt angle transmitter is installed on an erected body on which an overhead wire is laid, and the detection signal is transmitted to a management station through the overhead wire of the erected body for monitoring. (2) The tilt monitoring system according to claim 1, wherein the tilt angle transmitter is a semiconductor acceleration sensor.