Concrete slicking ruler capable of displaying floor pouring thickness deviation

Abstract

The utility model discloses a concrete slicking ruler capable of displaying floor slab pouring thickness deviation, which comprises a slicking ruler body, a power supply, a measuring mechanism for measuring the floor slab pouring thickness deviation, a signal conversion mechanism and a signal display mechanism, the power supply, the measuring mechanism and the signal conversion mechanism are all integrated on the ruler plate and are connected with one another through wires, the measuring mechanism comprises an ultrasonic sensor and can emit and transmit ultrasonic signals into concrete, and the ultrasonic signals are reflected when being transmitted to the interface of the concrete and a floor bottom template; the reflected wave is received by the ultrasonic signal sensor and converted into a corresponding action electric signal after being secondarily propagated in the concrete, and finally, the thickness deviation of floor concrete pouring is displayed in real time through the signal display mechanism. The pouring thickness of the concrete floor can be accurately controlled without arranging thickness control marks such as stirrups or steel chisels, and certain popularization value is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of building construction, in particular to a concrete leveling ruler which can display the thickness deviation of floor slab casting. Background Art

[0002] In the field of building engineering construction, when pouring floor slab concrete, it is necessary to accurately control the pouring thickness of the concrete and to scrape and finish the concrete surface to ensure that the quality control indicators such as the floor slab forming thickness, the thickness of the steel bar protective layer, and the floor slab surface flatness meet the requirements of the specifications. As for the existing methods for controlling the pouring thickness of floor slab concrete and scraping the surface, there are mainly the method of setting stirrups or thickness control markings, the method of inserting a rod to measure, the method of pulling a wire, etc., but the above methods all have some defects during the construction process.

[0003] For the method of setting stirrups or thickness control marks, it is usually necessary to set stirrups or other types of thickness control marks on the formwork in advance, and then when pouring concrete, according to the height of the stirrups or thickness control marks, use a concrete leveling ruler or a scraping plate that can display the thickness deviation of the floor slab to level the concrete surface. However, the thickness control mark is complicated to make and needs to be installed on the formwork in advance before pouring concrete, and the installation process is relatively cumbersome;

[0004] For the insertion measurement method, a ruler or other measuring tools are generally used to insert a rod to measure the thickness of concrete during concrete pouring. This method is greatly affected by human factors and cannot guarantee the uniformity and density of the distribution of the measuring points. It is easy to cause large fluctuations in the actual measured data of the plate thickness, which ultimately affects the plate thickness control results.

[0005] For the wire pulling method, generally one or several horizontal control measuring lines are pulled out before or during concrete pouring, and then the height of the finished surface of the concrete floor pouring is controlled according to the height of the measuring lines, so as to finally control the thickness of the floor pouring. This method often has shortcomings such as inaccurate elevation control lines and easy shaking of the wires, and it is also easy to cause deviations in the slab thickness control. Utility Model Content

[0006] The purpose of the utility model is to overcome the defects of the prior art and provide a concrete leveling ruler which can display the deviation of the pouring thickness of the floor slab. When the concrete surface of the floor slab is leveled, the concrete pouring thickness deviation of the leveled area can be displayed in real time, thereby realizing accurate control of the pouring thickness of the concrete floor slab and improving the pouring quality of the concrete floor slab.

[0007] In order to achieve the above technical effects, the utility model provides a concrete scraping ruler that can display the thickness deviation of floor slab casting, a scraping ruler body, the scraping ruler body includes a ruler plate and a handle fixedly connected to the ruler plate, and also includes:

[0008] A power supply, a measuring mechanism for measuring the deviation of the cast thickness of the floor slab, a signal conversion mechanism and a signal display mechanism. The power supply, the measuring mechanism and the signal conversion mechanism are all integrated in the scale plate and connected to each other through wires. The signal conversion mechanism includes a timer arranged on the scale plate and a signal conditioning circuit connected to the timer signal. The signal display mechanism is arranged on the surface of the scale plate and connected to the signal conversion mechanism through the wire.

[0009] Preferably, the measuring mechanism includes an ultrasonic signal sensor disposed on the scale plate and an ultrasonic signal generator connected to the ultrasonic signal sensor via the wire.

[0010] Preferably, the ultrasonic signal sensor includes an ultrasonic transducer disposed on the scale plate and connected to the ultrasonic signal generator via the wire, and a signal receiver connected to the ultrasonic transducer via the wire, and the signal receiver is connected to the signal conversion mechanism via the wire.

[0011] Preferably, the signal display mechanism includes three indicator lights of different colors arranged on the surface of the ruler.

[0012] Due to the adoption of the above technical solution, the technical effects achieved by the utility model are:

[0013] During the pouring and leveling process of floor slab concrete, the deviation between the actual pouring thickness and the designed thickness of the concrete floor slab can be monitored in real time. There is no need to set stirrups or thickness control marks in advance, and there is no need to insert drills or pull wires to accurately control the pouring thickness of the floor slab concrete. This can not only effectively improve the pouring quality of floor slab concrete, but also save materials and labor consumption for the production and installation of stirrups or thickness control marks. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings required for use in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

[0015] Figure 1 The utility model is a structural schematic diagram of a concrete leveling ruler capable of displaying the thickness deviation of floor slab casting.

[0016] Figure 2 The utility model is a schematic diagram of the working principle of a concrete leveling ruler capable of displaying the thickness deviation of floor slab casting.

[0017] The corresponding relationship of the numbers in the accompanying drawings is as follows:

[0018] 1-ruler; 2-handle; 3-ultrasonic signal sensor; 31-ultrasonic transducer; 32-signal receiver; 4-insulated wire; 5-power supply; 6-ultrasonic signal generator; 7-signal conversion mechanism; 8-signal display mechanism; 9-floor concrete; 10-floor formwork. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1 to Figure 2 As shown, the embodiment of the utility model provides a concrete scraping ruler capable of displaying the deviation of the cast thickness of a floor slab, comprising a scraping ruler body, the scraping ruler body comprising a ruler plate 1 and a handle 2 fixedly connected to the ruler plate 1, a power supply 5, a measuring mechanism for measuring the deviation of the cast thickness of a floor slab, a signal conversion mechanism 7 and a signal display mechanism 8 ( Figure 1 (not shown), the power supply 5, the measuring mechanism and the signal conversion mechanism 7 are integrated in the scale plate 1 and are connected to each other through wires. The signal conversion mechanism 7 includes a timer arranged on the scale plate 1 and a signal conditioning circuit connected to the timer signal. The signal display mechanism 8 is arranged on the surface of the scale plate 1 and is connected to the signal conversion mechanism 7 through an insulated wire 4.

[0021] Furthermore, the measuring mechanism in this embodiment includes an ultrasonic signal sensor 3 disposed on the scale plate and an ultrasonic signal generator 6 connected to the ultrasonic signal sensor 3 via a wire. Figure 1As shown, in this embodiment, two ultrasonic signal sensors 3 are provided, and the ultrasonic signal sensors 3 include an ultrasonic transducer 31 and a signal receiver 32 connected to the ultrasonic transducer 31 via a wire 4. The ultrasonic transducer 31 is connected to the ultrasonic signal generator 6 using the insulated wire 4, and the signal receiver 32 is connected to the signal conversion mechanism 7 using the insulated wire 4. Preferably, the ultrasonic signal generator 6 has a built-in driving circuit and an oscillation circuit, which can convert the first electrical signal from the power supply 5 into a high-frequency AC signal that matches the frequency of the ultrasonic transducer 31. After receiving the high-frequency AC signal emitted by the ultrasonic signal generator 6, the ultrasonic transducer 31 can emit an ultrasonic signal that matches the frequency of the high-frequency AC signal. The ultrasonic signal can be received by the signal receiver 32 after being reflected by the floor. After receiving the reflected ultrasonic signal, the signal receiver 32 can convert it into a corresponding second electrical signal and input it into the signal conversion mechanism 7. The signal conversion mechanism 7 has a built-in timing and signal conditioning circuit (a circuit that can convert analog signals into digital signals for data acquisition, control processes, execution of calculations, display readouts or other purposes). In this embodiment, the signal conversion mechanism 7 can output a corresponding action electrical signal according to the signal time difference between the received first electrical signal and the second electrical signal through a timer, and input it to the signal display mechanism 8 through the insulated wire 4. After receiving the action electrical signal from the signal conversion mechanism 7, the signal display mechanism 8 can make an action display corresponding to the action electrical signal.

[0022] Specifically, before the concrete pouring operation, a wooden beam or hanging formwork with a height of h0 and a horizontal upper end can be used to enclose a sample range on the horizontal concrete floor to be poured, and then concrete is poured within the sample range, and the above-mentioned leveling ruler is used to level the concrete surface along the upper end of the wooden beam or hanging formwork.

[0023] Furthermore, after the power supply 5 is turned on, the ultrasonic signal generator 6 converts the first electrical signal from the power supply 5 into a high-frequency AC signal of a certain frequency. The high-frequency AC signal drives the ultrasonic transducer 31 fixed on the scale plate 1 to emit an ultrasonic signal of a certain frequency into the concrete 9 and triggers the timer of the signal conversion mechanism 7 to start timing. The ultrasonic signal propagates downward inside the concrete 9 to the interface between the concrete and the concrete formwork 10 and generates reflection. The reflected wave signal propagates twice inside the concrete 9 and is finally received by the signal receiver 32 and triggers the timer of the signal conversion mechanism 7 to stop timing.

[0024] Furthermore, assuming that the time difference between the time when the signal receiver 32 receives the ultrasonic signal and the time when the ultrasonic transducer 31 transmits the ultrasonic signal is △t0, the time difference is the time for the ultrasonic signal to propagate inside the concrete 9; based on the known thickness h0 of the concrete 9, the propagation speed v=2h0 / △t0 of the ultrasonic signal in the concrete to be poured can be accurately calculated.

[0025] Specifically, based on the measured propagation velocity v of ultrasound in concrete 9, the design thickness h1 of the proposed floor slab, and the allowable thickness deviation ±△h1, it can be calculated that the theoretical time difference between the time when the signal receiver 32 receives the ultrasonic signal and the time when the ultrasonic transducer 31 transmits the ultrasonic signal is △t1=2h1 / v, and the theoretical allowable time deviation is ±(2△h1 / v).

[0026] Furthermore, according to the calculated theoretical time difference △t1 between the time when the signal receiver 32 receives the ultrasonic signal and the time when the ultrasonic transducer 31 transmits the ultrasonic signal, and the theoretical allowable time deviation ±(2△h1 / v), the parameters of the signal conversion circuit built into the signal conversion mechanism 7 are adjusted and set. If the time difference between the time when the signal conversion circuit receives the signal from the signal receiver 32 and the time when the ultrasonic transducer 31 transmits the ultrasonic signal is within the range of the theoretical allowable time deviation △t1-(2△h1 / v) to △t1+(2△h1 / v), it can be determined that the actual pouring thickness of the concrete 9 is within the allowable thickness deviation range. At this time, the signal conversion circuit will output a type A action electrical signal to the signal display mechanism 8; if the signal If the time difference between the signal conversion circuit receiving the signal from the signal receiver 32 and the time difference between the ultrasonic transducer 31 transmitting the ultrasonic signal is greater than the theoretically allowable time deviation △t1+(2△h1 / v), it can be determined that the actual pouring thickness of the concrete 9 is greater than the allowable thickness deviation range, and the signal conversion circuit outputs a type B action electrical signal to the signal display mechanism 8; if the time difference between the signal conversion circuit receiving the signal from the signal receiver 32 and the time difference between the ultrasonic transducer 31 transmitting the ultrasonic signal is less than the theoretically allowable time deviation △t1-(2△h1 / v), it can be determined that the actual pouring thickness of the concrete 9 is less than the allowable thickness deviation range, and the signal conversion circuit outputs a type C action electrical signal to the signal display mechanism 8.

[0027] See also Figure 2 As shown, in this embodiment, the signal display mechanism 8 uses indicator lights of three colors, green, yellow and red, to display actions. If the signal display mechanism 8 receives a type A action electrical signal from the signal conversion mechanism 7, the green signal light will light up; if the signal display mechanism 8 receives a type B action electrical signal from the signal conversion mechanism 7, the yellow signal light will light up; if the signal display mechanism 8 receives a type C action electrical signal from the signal conversion mechanism 7, the red signal light will light up.

[0028] Preferably, according to the type of action signal displayed by the signal display mechanism 8, the deviation of the pouring thickness of the concrete 9 in the scraping area can be determined. When the green signal light is on, it indicates that the pouring and scraping thickness of the concrete 9 meets the requirements; when the yellow signal light is on, it indicates that the pouring and scraping thickness of the concrete 9 exceeds the reasonable range and needs to be thinned; when the red signal light is on, it indicates that the pouring and scraping thickness of the concrete 9 is less than the reasonable range and needs to be supplemented.

[0029] The utility model adopts a concrete leveling ruler which can display the deviation of the pouring thickness of the floor slab. During the pouring and leveling process of the floor slab concrete, the deviation between the actual pouring thickness and the designed thickness of the concrete of the floor slab can be monitored in real time. There is no need to set stirrups or thickness control marks in advance, and there is no need to insert drills or pull wires. The pouring thickness of the floor slab concrete can be accurately controlled. This can not only effectively improve the pouring quality of the floor slab concrete, but also save materials and labor consumption for the production and installation of stirrups or thickness control marks, and has certain promotion value.

[0030] Parts not involved in the present invention are the same as the prior art or can be implemented by the prior art. Although the embodiments of the present invention have been shown and described, it is understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the attached claims and their equivalents.

Claims

1. A concrete leveling ruler capable of displaying the thickness deviation of a floor slab, comprising a leveling ruler body, wherein the leveling ruler body comprises a ruler plate and a handle fixedly connected to the ruler plate, characterized in that: It also includes a power supply, a measuring mechanism for measuring the deviation of the casting thickness of the floor slab, a signal conversion mechanism and a signal display mechanism. The power supply, the measuring mechanism and the signal conversion mechanism are all integrated in the scale plate and are connected to each other through wires. The signal conversion mechanism includes a timer arranged in the scale plate and a signal conditioning circuit connected to the timer signal. The signal display mechanism is arranged on the surface of the scale plate and is connected to the signal conversion mechanism through the wire.

2. The concrete leveling ruler capable of displaying the thickness deviation of floor slab casting as claimed in claim 1, characterized in that: The measuring mechanism includes an ultrasonic signal sensor disposed on the scale plate and an ultrasonic signal generator connected to the ultrasonic signal sensor through the wire.

3. The concrete leveling ruler capable of displaying the thickness deviation of floor slab casting as claimed in claim 2, characterized in that: The ultrasonic signal sensor includes an ultrasonic transducer disposed on the scale plate and connected to the ultrasonic signal generator through the wire, and a signal receiver connected to the ultrasonic transducer through the wire, and the signal receiver is connected to the signal conversion mechanism through the wire.

4. The concrete leveling ruler capable of displaying the thickness deviation of floor slab casting as claimed in claim 1, characterized in that: The signal display mechanism includes three indicator lights of different colors arranged on the surface of the ruler.

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