JP2015165072A - Management apparatus of concrete pavement cure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a management apparatus of concrete pavement cure capable of notifying water spray timing of a caved concrete slab without depending on experiences or hunch of operators.SOLUTION: A management apparatus of concrete pavement cure 100 includes: a sensor 200 for detecting capacitance between two points separated from each other on a caved concrete slab; a controller 300 that calculates moisture content of the concrete slab based on the capacitance; and an indicator unit 400 that indicates the moisture content of the concrete slab using different colors. The controller 300 refers to, for example, a map in which the moisture content corresponding to the capacitance is set to calculate the moisture content corresponding to an output from the sensor 200. The controller 300 controls a signal tower 410 of the indicator unit 400 to indicate the moisture content of the concrete slab using different colors.

Description

  The present invention relates to a concrete pavement curing management device.

  The paved concrete slab develops strength through a hydration reaction between cement and water. Therefore, as described in “Handbook of Pavement Construction (2006 edition)” (Non-patent Document 1), the surface of the concrete plate is covered with a curing mat without any gaps, and the wet curing is performed to spray the water so that it becomes wet. It has been broken.

“Paving Construction Handbook (2006 edition)”, Japan Road Association, February 24, 2006, p. 165-167

  However, since the watering to the concrete plate was performed at a timing depending on the experience and intuition of the operator, it was not necessarily performed at an appropriate timing, and the quality of the concrete pavement was highly variable.

  Accordingly, the present invention provides a concrete pavement curing management device (hereinafter abbreviated as “curing management device”) that can notify the timing of water spraying on a concrete plate without depending on the experience and intuition of the operator. The purpose is to do.

  The curing management device is a sensor that detects the electrical characteristics between two spaced apart points of the concrete slab contacting the surface of the paved concrete slab, a calculation means for calculating the moisture content of the concrete slab from the electrical characteristics, An informing means for informing the water content ratio of the plate.

  Since the moisture content calculated from the electrical characteristics between two spaced apart points of the concrete plate is notified, it is possible to know the timing of water spraying on the concrete plate without depending on the experience and intuition of the operator.

It is a perspective view which shows an example of a curing management apparatus. It is a functional block diagram which shows an example of a curing management apparatus. It is explanatory drawing of the light-shielding plate which makes a display apparatus easy to see. It is explanatory drawing of the display apparatus with which the light-shielding plate was attached.

Hereinafter, embodiments for carrying out the present invention will be described in detail with reference to the accompanying drawings.
FIG.1 and FIG.2 shows an example of the curing management apparatus 100. FIG.

  The curing management device 100 includes a sensor 200 that detects electrical characteristics between two spaced points of a paved concrete plate, a control device 300 that calculates the moisture content of the concrete plate from the output of the sensor 200, and the moisture content of the concrete plate. And a display device 400 for displaying the color by color. Here, the control device 300 also has a function of controlling the display device 400 according to the moisture content of the concrete plate. Moreover, as an electrical characteristic between the two spaced apart points of the concrete plate, for example, an electrostatic capacity, an electrical resistance, or the like can be used. In the following description, an electrostatic capacity is used. In addition, while the control apparatus 300 is mentioned as an example of a calculation means, the display apparatus 400 is mentioned as an example of an alerting | reporting means which alert | reports the moisture content of a concrete plate.

  The sensor 200 includes a pair of electrode plates 210 that are in contact with the surface of the paved concrete plate 500, a rectangular insulating plate 220 that connects the pair of electrode plates 210 with a predetermined distance therebetween, and a pair of electrodes 210. And a storage battery 230 that applies a pulse of a predetermined voltage (for example, 5 V). The sensor 200 detects a capacitance between two spaced apart points of the concrete plate 500 when the pair of electrode plates 210 come into contact with the surface of the paved concrete plate 500. Here, the storage battery 230 is an example of a power source that applies a predetermined voltage between the pair of electrode plates 210.

  In order to ensure contact with the concrete plate 500, for example, a conductive elastic body 240 such as a conductive sponge is attached to the lower surface of the pair of electrode plates 210, that is, the lower surface contacting the surface of the concrete plate 500. It is done. The elastic body 240 can be attached to the electrode plate 210 using, for example, a fixing means such as conductive double-sided tape or adhesive. By attaching the elastic body 240 to the lower surface of the electrode plate 210, for example, even if there are minute irregularities on the surface of the concrete plate 500, the elastic body 240 is elastically deformed and closely attached. Capacitance detection accuracy can be improved. The elastic body 240 is preferably made of a heat-resistant member, and is preferably exchangeable because of deterioration.

  The control device 300 is configured by, for example, a microcomputer, an electronic circuit, and the like, and operates by being supplied with electric power from the storage battery 230 of the sensor 200. Then, the control device 300 reads the output (capacitance) of the sensor 200 and calculates the water content ratio of the concrete plate 500 from the capacitance between two spaced apart points of the concrete plate 500. Control device 300 may be operated by a power source different from storage battery 230.

  When the amount of water in the concrete plate 500 decreases, current hardly flows between the pair of electrode plates 210 in the sensor 200, and thus the capacitance decreases. On the other hand, when the amount of water in the concrete plate 500 increases, a current easily flows between the pair of electrode plates 210 in the sensor 200, so that the capacitance increases. For this reason, the control apparatus 300 calculates the water content ratio of the concrete plate 500 via the capacitance closely related to the water content ratio of the concrete plate 500. Specifically, the control device 300 can calculate the water content ratio according to the capacitance detected by the sensor 200 with reference to, for example, a map in which the water content ratio corresponding to the capacitance is set.

  The display device 400 includes a signal tower 410 that displays the water content ratio of the concrete plate 500 for each color, and a tripod 420 that supports the signal tower 410. The signal tower 410 displays the water content ratio of the paved concrete plate 500 in, for example, three stages of a red lamp (dry state), a yellow lamp (low wet state), and a blue / green lamp (wet state). Here, the signal tower 410 may use an LED (Light Emitting Diode) in order to reduce power consumption. Note that the water content ratio of the concrete plate 500 is not limited to the three levels of the red lamp, the yellow lamp, and the blue / green lamp, but may be notified at least in two or more stages capable of reporting whether or not the wet state.

  The tripod 420 connects the main body 420A, three legs 420B attached to the main body 420A so as to be deployable, an elevator 420C attached to the main body 420A so as to be movable up and down, and the legs 420B and the elevator 420C. And a stay 420D for reinforcement. And the signal tower 410 is attached to the upper end part of the elevator 420C.

  A solar panel 600 is attached to the tripod 420. The solar panel 600 generates light by receiving light energy from the sun, and the generated power is stored in the storage battery 230 via an inverter (not shown). For this reason, even if it is a place without external power supplies, such as a generator and a commercial power supply, the curing management apparatus 100 can be operated over a long time. In addition, the solar panel 600 and an inverter are mentioned as an example of the solar power generation device which receives the light energy from the sun and generates electric power.

  Further, a control box 720 in which the storage battery 230 and the control device 300 are incorporated is detachably suspended from the stay 420D of the tripod 420 via a carabiner 700 and a chain 710. In this way, since the heavy object is located below the tripod 420 and its center of gravity is lowered, the display device 400 can be prevented from falling down even when an external force such as wind acts.

  The control box 720 is provided with a warning light that is turned on when the charge amount of the storage battery 230 falls below a specified value, a charger insertion port for connecting a charger, and the like (not shown). Therefore, when the warning light is lit, the battery 230 is charged while supplying power to the sensor 200, the control device 300, and the display device 400 by connecting a charger to the charger inlet of the control box 720. can do.

Next, the usage method and operation | movement of the curing management apparatus 100 are demonstrated.
As shown in FIG. 2, the sensor 200 is installed on the upper surface of the paved concrete plate 500, and the concrete plate 500 and the sensor 200 are covered with a curing sheet 800. In addition, for example, the display device 400 in which the control box 720 is suspended is installed at a position that is easily visible to the operator. In the initial state, since the concrete plate 500 is in a wet state, the control device 300 turns on the blue / green lamp of the display device 400.

  When the water content ratio decreases due to hydration reaction, water evaporation, etc. in the concrete plate 500, it becomes difficult for current to flow between the pair of electrode plates 210 of the sensor 200, and the capacitance between two spaced points is small. Become. The control device 300 reads the output of the sensor 200 and calculates the water content ratio of the concrete slab 500 from the output. Then, when the water content ratio of the concrete plate 500 becomes equal to or less than a first predetermined value (for example, a threshold value that defines a wet state), the control device 300 turns on the yellow lamp instead of the blue / green lamp of the display device 400. Therefore, by appropriately setting the first predetermined value, the worker who has visually recognized that the yellow lamp of the display device 400 has been turned on can recognize that the watering timing of the concrete plate 500 has approached, for example.

  As the water content ratio decreases in the concrete plate 500, it becomes more difficult for a current to flow between the pair of electrode plates 210 of the sensor 200, and the capacitance between two spaced points is further reduced. When the water content ratio of the concrete slab 500 calculated from the output of the sensor 200 is equal to or lower than a second predetermined value (for example, a threshold value that defines a dry state; a first threshold value> a second threshold value), Instead of the yellow lamp of the display device 400, the red lamp is turned on. Therefore, by appropriately setting the second predetermined value, an operator who has visually recognized that the red lamp of the display device 400 has been turned on can recognize that the timing for watering the concrete plate 500 has arrived. In addition, watering to the concrete plate 500 can be performed using a watering hose etc., for example.

  Accordingly, as the water content ratio of the concrete plate 500 decreases, the display device 400 changes from a blue / green lamp to a yellow lamp and a red lamp, so that the operator can only visually recognize the color of the lamp of the display device 400. It is possible to recognize what the concrete plate 500 is in. When the worker recognizes that the concrete plate 500 is in a dry state, the worker can keep the wet state by watering the concrete plate 500. For this reason, it can be expected that water can be sprayed onto the concrete plate 500 at an appropriate timing without depending on the experience and intuition of the operator, and the quality of the concrete pavement can be made uniform.

  Since the display device 400 is installed outdoors, for example, it may be difficult to visually recognize the lighting color of the lamp during the daytime when it is irradiated with sunlight. In this case, visibility may be improved by attaching a light shielding plate 900 as shown in FIGS. 3 and 4 to the signal tower 410 and avoiding direct sunlight.

  The light shielding plate 900 includes a substantially circular disk member 910 that is arranged concentrically with the signal tower 410 and covers the signal tower 410, and a fixing member 920 for elastically holding and fixing the signal tower 410. The fixing member 920 includes two members having a cross section that follows a part of the outer shape of the signal tower 410, and is attached to the lower surface of the disk member 910. Note that the fixing member 920 is made of, for example, an elastic body such as a spring material so as to be detachable from the signal tower 410.

In the curing management apparatus 100, each component can be configured as follows.
As a member for supporting the display device 400, a support member having a base and a column can be used instead of the tripod 420. In the display device 400, instead of or in addition to the signal tower 410, the moisture content of the concrete plate 500 can be notified by voice or the like. In addition, when the water content ratio of the concrete plate 500 decreases, the control device 300 may wirelessly transmit the fact to the office or the like.

DESCRIPTION OF SYMBOLS 100 Curing management apparatus 200 Sensor 210 A pair of electrode plate 220 Insulating plate 230 Storage battery 240 Elastic body 300 Control apparatus 400 Display apparatus 410 Signal tower 500 Concrete plate 600 Solar panel

Claims (5)

A sensor that contacts the surface of the paved concrete plate and detects electrical characteristics between two spaced apart points of the concrete plate;
A calculating means for calculating a water content ratio of the concrete slab from the electrical characteristics;
Informing means for informing the moisture content of the concrete plate,
A concrete pavement curing management device characterized by comprising: The notification means displays the water content ratio of the concrete slab by color.
The curing management device of concrete pavement according to claim 1 characterized by things. The sensor includes a pair of electrode plates that contact a surface of a concrete plate, an insulating plate that connects the pair of electrode plates with a predetermined distance therebetween, and a power source that applies a predetermined voltage between the pair of electrode plates. And detecting a capacitance between the pair of electrode plates,
The curing management device for concrete pavement according to claim 1 or 2, characterized by the above-mentioned. An elastic body having conductivity is attached to the lower surfaces of the pair of electrode plates.
The concrete pavement curing management device according to claim 3. A solar power generation device that generates light by receiving light energy from the sun;
A storage battery for storing electric power generated by the solar power generation device;
The curing management device for concrete pavement according to any one of claims 1 to 4, further comprising: