CN114353720B - Hydraulic support mining height measuring device and method based on stay wire displacement sensor - Google Patents
Hydraulic support mining height measuring device and method based on stay wire displacement sensor Download PDFInfo
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Abstract
The invention provides a hydraulic support mining height measuring device and method based on a stay wire displacement sensor, and belongs to the technical field of coal mine support mining height; the technical problem to be solved is as follows: the improvement of the hydraulic support mining height measuring method based on the stay wire displacement sensor is provided; the technical scheme for solving the technical problems is as follows: calibrating the initial distance of the pull wire displacement sensor and the initial height of the hydraulic support; acquiring the real-time height of the hydraulic support through a stay wire displacement sensor in the hydraulic support mining height measuring device; the method comprises the steps that after a current signal of a stay wire displacement sensor is collected by a collecting terminal, the actual coal mining height of a hydraulic support is measured and calculated; the method comprises the following steps that an acquisition terminal uploads the actual mining height of a hydraulic support to a cloud platform, and the cloud platform feeds back signals to support controllers through the acquisition terminal by comparing the height difference of adjacent supports according to the measured height of the hydraulic support to perform electro-hydraulic control on the support posture; the invention is applied to the mining height measurement of the hydraulic support.
Description
Technical Field
The invention provides a hydraulic support mining height measuring device and method based on a stay wire displacement sensor, and belongs to the technical field of mining height measurement of hydraulic supports for coal mines.
Background
The mining height measuring method of the hydraulic support is a method for measuring the real-time height of the hydraulic support, the mining height is a main parameter of a fully mechanized coal mining face, and the method is mainly used for mining height control, coal quantity measurement and calculation, incoming pressure early warning and the like.
Originally, the fully mechanized mining team of the coal mine uses a measuring tape to measure the mining height, and the change condition of the mining height cannot be monitored and mastered in real time only by instantaneous measurement.
Along with the development of intelligent comprehensive mining, the existing mode of measuring and mining height mainly adopts a tilt sensor to measure and convert, the mounting position of the tilt sensor is mainly arranged on the inner side of a top beam of a hydraulic support, the front end of a base of the hydraulic support and the inner side surface of a shield beam of the hydraulic support (refer to fig. 1), but the tilt sensor is used for having the following defects in the measuring process: firstly, each hydraulic support needs to be provided with a plurality of inclination angle sensors, and each inclination angle sensor needs to be arranged at a corresponding position, so that the cost of a project single piece is increased, and the cost of after-sales maintenance is increased; secondly, because each bracket needs to be provided with a plurality of inclination angle sensors, the accumulated error is increased; thirdly, as the hydraulic support deforms along with the coal mining process or the inclination angle sensors loosen, the initial angle of each inclination angle sensor changes, and the measurement precision is finally influenced; therefore, it is necessary to solve the above-mentioned technical problems.
Disclosure of Invention
In order to overcome the defects in the prior art, the invention aims to solve the technical problems that: the improvement of the hardware structure of the hydraulic support mining height measuring device based on the stay wire displacement sensor and the improvement of the measuring method thereof are provided.
In order to solve the technical problems, the technical scheme adopted by the invention is as follows: a hydraulic support mining height measuring device based on a stay wire displacement sensor comprises a hydraulic support body, a stay wire displacement sensor and an acquisition terminal, wherein the stay wire displacement sensor comprises a stay rope, a pull ring and a stay wire displacement sensor body, the stay wire displacement sensor body is fixed on the inner side of a hydraulic support top beam, the pull ring is fixed on the outer side of a hydraulic support upright post cylinder body, the stay rope extending out of the stay wire displacement sensor body is connected with a fixed point of the pull ring through a pulley, so that the stay rope on a hydraulic support upright post is parallel to the hydraulic support upright post, and the pulley is fixed on the inner side of the hydraulic support top beam;
the acquisition terminal comprises a microcontroller and a wireless transmission module, the microcontroller is connected with the stay wire displacement sensor through a wire, the microcontroller is in two-way communication with the cloud platform through the wireless transmission module, and the microcontroller is further connected with the plurality of support controllers through wires.
The stay wire displacement sensor body is connected with the acquisition terminal through a four-core mining cable.
The stay cord specifically adopts the steel wire material.
A hydraulic support mining height measuring method based on a stay wire displacement sensor comprises the following steps:
s1: calibrating the initial distance of the pull wire displacement sensor and the initial height of the hydraulic support;
s2: acquiring the real-time height of the hydraulic support through a stay wire displacement sensor in the hydraulic support mining height measuring device;
s3: the method comprises the steps that after a current signal of a stay wire displacement sensor is collected by a collecting terminal, the actual coal mining height of a hydraulic support is measured and calculated;
s4: and the acquisition terminal calculates the height of the hydraulic support according to the actual mining height of the hydraulic support, and by comparing the height difference of adjacent supports, signals are fed back to each support controller through the acquisition terminal to perform electro-hydraulic control on the support posture.
Further comprising S5: and the acquisition terminal uploads the actual mining height of the hydraulic support to the cloud platform, the cloud platform calculates the coal amount, and then the dynamic drawing of the coal amount curve is carried out.
Further comprising S6: after the cloud platform receives the height of the hydraulic support, the sinking amount of the top plate is accumulated according to the cycle progress of the working face, and the working face pressure step is measured and calculated in an auxiliary mode.
The initial calibration in step S1 is as follows: l for distance from center point of steel wire rope outlet of stay wire displacement sensor to center point of pulley0Indicating that the initial height of the hydraulic support is H when the stay wire displacement sensor is calibrated0The extension length of the stay wire displacement sensor is expressed by L, and the effective extension length of the stay wire displacement sensor is expressed by L-L0And (4) showing.
The step of measuring and calculating the actual coal mining height of the hydraulic support in the step S3 is as follows:
stay wire displacement sensor steel wire stay cord length LXAnd an output current signal AXThe conversion formula of (c) is as follows:
LX=3/16AX-3/4；
the acquisition terminal acquires current signals of the stay wire displacement sensor and then calculates the current signals as follows:
effective extension length of stay wire displacement sensor = extension length of stay wire displacement sensor L-distance L from center point of steel wire stay rope outlet of stay wire displacement sensor to center point of pulley0；
The extension length L =3/16A-3/4 of the stay wire displacement sensor, wherein A is the output analog quantity value of the sampling point stay wire displacement sensor;
distance L from center point of steel wire rope outlet of stay wire displacement sensor to center point of pulley0=3/16A0-3/4, wherein A0Outputting an analog quantity value for the default of the calibrated pull wire displacement sensor;
actual mining height of hydraulic support = initial height of hydraulic support (H)0) Effective extension length (L-L) of + stay wire displacement sensor0）。
The coal amount = actual mining height of the hydraulic support cycle progress working face length specific gravity of the coal.
Compared with the prior art, the invention has the beneficial effects that: the hydraulic support mining height method provided by the invention has the advantages that the installation process is simplified, the project cost is reduced, the coal quantity measuring and calculating precision is improved, the mining height control precision is improved, and the safety degree during installation is increased.
Drawings
The invention is further described below with reference to the accompanying drawings:
fig. 1 is a schematic view of a sensor mounting structure of a hydraulic support mining height measuring device in the prior art;
FIG. 2 is a schematic structural diagram of a hydraulic support mining height measuring device according to the present invention;
FIG. 3 is a flow chart of a hydraulic support mining height measurement method of the present invention;
FIG. 4 is a schematic structural diagram of a pull wire displacement sensor employed in the present invention;
in the figure: the hydraulic support comprises a hydraulic support body 1, a tilt angle sensor 2, a stay wire displacement sensor body 3, a pull rope 4, a pull ring 5, a hydraulic support top beam 6, a hydraulic support upright post 7 and a pulley 8.
Detailed Description
As shown in fig. 1 to 4, the hydraulic support mining height measuring device based on the stay wire displacement sensor of the invention comprises a hydraulic support body 1, a stay wire displacement sensor, a collecting terminal, a stay wire displacement sensor and a collecting terminal, wherein the stay wire displacement sensor comprises a stay wire 4, a pull ring 5 and a stay wire displacement sensor body 3, the stay wire displacement sensor body 3 is fixed at the inner side of a hydraulic support top beam 6, the pull ring 5 is fixed at the outer side of a hydraulic support upright post 7 cylinder body, the stay wire 4 extending out of the stay wire displacement sensor body 3 is connected with a fixed point of the pull ring 5 through a pulley 8, so that the stay wire 4 on the hydraulic support upright post 7 is kept parallel to the hydraulic support upright post 7, and the pulley 8 is fixed at the inner side of the hydraulic support top beam 6;
the acquisition terminal comprises a microcontroller and a wireless transmission module, the microcontroller is connected with the stay wire displacement sensor through a wire, the microcontroller is in two-way communication with the cloud platform through the wireless transmission module, and the microcontroller is further connected with the plurality of support controllers through wires.
The stay wire displacement sensor body is connected with the acquisition terminal through a four-core mining cable.
The pull rope 4 is made of steel wires.
A hydraulic support mining height measuring method based on a stay wire displacement sensor comprises the following steps:
s1: calibrating the initial distance of the pull wire displacement sensor and the initial height of the hydraulic support;
s2: acquiring the real-time height of the hydraulic support through a stay wire displacement sensor in the hydraulic support mining height measuring device;
s3: the method comprises the steps that after a current signal of a stay wire displacement sensor is collected by a collecting terminal, the actual coal mining height of a hydraulic support is measured and calculated;
s4: and the acquisition terminal calculates the height of the hydraulic support according to the actual mining height of the hydraulic support, and by comparing the height difference of adjacent supports, signals are fed back to each support controller through the acquisition terminal to perform electro-hydraulic control on the support posture.
Further comprising S5: and the acquisition terminal uploads the actual mining height of the hydraulic support to the cloud platform, the cloud platform calculates the coal amount, and then the dynamic drawing of the coal amount curve is carried out.
Further comprising S6: after the cloud platform receives the height of the hydraulic support, the sinking amount of the top plate is accumulated according to the cycle progress of the working face, and the working face pressure step is measured and calculated in an auxiliary mode.
The initial calibration in step S1 is as follows: l for distance from center point of steel wire rope outlet of stay wire displacement sensor to center point of pulley0Showing that when the stay wire displacement sensor is calibrated, the initial height of the hydraulic support is H0The extension length of the stay wire displacement sensor is expressed by L, and the effective extension length of the stay wire displacement sensor is expressed by L-L0And (4) showing.
The step of measuring and calculating the actual coal mining height of the hydraulic support in the step S3 is as follows:
stay wire displacement sensor steel wire stay cord length LXAnd an output current signal AXThe conversion formula of (c) is as follows:
LX=3/16AX-3/4；
the acquisition terminal acquires current signals of the stay wire displacement sensor and then calculates the current signals as follows:
effective extension length of stay wire displacement sensor = extension length of stay wire displacement sensor L-distance L from center point of steel wire stay rope outlet of stay wire displacement sensor to center point of pulley0；
The extension length L =3/16A-3/4 of the stay wire displacement sensor, wherein A is the output analog quantity value of the sampling point stay wire displacement sensor;
distance L from center point of steel wire rope outlet of stay wire displacement sensor to center point of pulley0=3/16A0-3/4, wherein A0Outputting an analog quantity value for the default of the calibrated pull wire displacement sensor;
actual mining height of hydraulic support = initial height of hydraulic support (H)0) Effective extension length (L-L) of + stay wire displacement sensor0）。
The coal amount = actual mining height of the hydraulic support cycle progress working face length specific gravity of the coal.
The invention provides a hydraulic support mining height measuring device, which comprises a pull rope 4 and a pull rope displacement sensor body 3, wherein the pull rope 4 is made of a steel wire material and is used for detecting the moving distance of a hydraulic support stand column; the stay wire displacement sensor body 3 is used for acquiring the length change of the stay rope; and converting the change length of the pull rope into an analog quantity signal (voltage of 0-5V or current of 4-20 mA) and uploading the analog quantity signal to an acquisition terminal.
The invention also provides a hydraulic support mining height measuring method, which comprises a stay wire displacement sensor; the stay wire displacement sensor body 3 is fixed on the inner side of a top beam 6 of the hydraulic support, the stay wire displacement sensor body 3 is connected with the acquisition terminal through a four-core mining cable, a steel wire stay cord 4 of the stay wire displacement sensor is fixed on the outer side of a cylinder body of a vertical column 7 of the hydraulic support, and the stay cord of the stay wire sensor is guaranteed to be parallel to the vertical column 7 of the hydraulic support through a pulley 8.
The invention uses L to measure the distance from the center point of the steel wire rope 4 outlet of the stay wire displacement sensor to the center point of the pulley 8 when the mining height of the hydraulic support is measured0Showing that when the stay wire displacement sensor is calibrated, the initial height of the hydraulic support is H0The extension length of the stay wire displacement sensor is expressed by L, and the effective extension length of the stay wire displacement sensor is expressed by L-L0And (4) showing.
Stay wire displacement sensor steel wire rope length LXAnd an output current signal AXThe conversion formula of (c) is as follows:
LX=3/16AX-3/4。
the acquisition terminal acquires current signals of the stay wire displacement sensor and then calculates the current signals as follows:
effective extension length of stay wire displacement sensor = extension length of stay wire displacement sensor L-distance L from steel wire rope outlet central point of stay wire displacement sensor to pulley central point0；
The extension length L =3/16A-3/4(A is the output analog value of the pull wire displacement sensor at the sampling point);
distance L from center point of steel wire rope outlet of stay wire displacement sensor to center point of pulley0=3/16A0-3/4(A0For calibrating default output of rear pull wire displacement sensorAnalog magnitude);
actual mining height of hydraulic support = initial height of hydraulic support (H)0) Effective extension length (L-L) of + stay wire displacement sensor0)。
The acquisition terminal uploads the actual mining height of the hydraulic support to the cloud platform, and the cloud platform calculates the coal amount: coal quantity = actual mining height of the hydraulic support and cycle progress and working face length and specific gravity of the coal, and then dynamic drawing of a coal quantity curve is performed;
after the cloud platform acquires the height of the hydraulic supports, signals are fed back to the support controllers through the acquisition terminal by comparing the height difference of the adjacent supports, the postures of the hydraulic supports are controlled, and the electro-hydraulic support is prevented from being bitten by the support controllers;
after the height of the hydraulic support is collected by the cloud platform, the sinkage of the top plate is accumulated by combining the cycle progress of the working face, and the working face pressure step is measured and calculated in an auxiliary mode.
It should be noted that, regarding the specific structure of the present invention, the connection relationship between the modules adopted in the present invention is determined and can be realized, except for the specific description in the embodiment, the specific connection relationship can bring the corresponding technical effect, and the technical problem proposed by the present invention is solved on the premise of not depending on the execution of the corresponding software program.
Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; and the modifications or the substitutions do not make the essence of the corresponding technical solutions depart from the scope of the technical solutions of the embodiments of the present invention.
Claims (6)
1. The utility model provides a hydraulic support adopts high measuring device based on stay wire displacement sensor, includes the hydraulic support body, its characterized in that: the pull-wire displacement sensor comprises a pull-wire, a pull ring and a pull-wire displacement sensor body, wherein the pull-wire displacement sensor body is fixed on the inner side of the top beam of the hydraulic support, the pull ring is fixed on the outer side of a cylinder body of an upright post of the hydraulic support, the pull wire extending out of the pull-wire displacement sensor body is connected with a fixed point of the pull ring through a pulley, so that the pull wire on the upright post of the hydraulic support is parallel to the upright post of the hydraulic support, and the pulley is fixed on the inner side of the top beam of the hydraulic support;
the acquisition terminal comprises a microcontroller and a wireless transmission module, the microcontroller is connected with the stay wire displacement sensor through a lead, the microcontroller is in bidirectional communication with the cloud platform through the wireless transmission module, and the microcontroller is also connected with the plurality of support controllers through leads;
the collecting terminal collects a current signal of the stay wire displacement sensor and then calculates the actual coal mining height of the hydraulic support;
the acquisition terminal uploads the actual mining height of the hydraulic support to the cloud platform, and the cloud platform calculates the coal amount: coal quantity = actual mining height of the hydraulic support and cycle progress and working face length and specific gravity of the coal, and then dynamic drawing of a coal quantity curve is performed;
after the height of the hydraulic supports is acquired by the cloud platform, signals are fed back to the support controllers through the acquisition terminal by comparing the height difference of the adjacent supports, and the postures of the hydraulic supports are controlled.
2. The hydraulic support mining height measuring device based on the stay wire displacement sensor as claimed in claim 1, wherein: the stay wire displacement sensor body is connected with the acquisition terminal through a four-core mining cable.
3. The hydraulic support mining height measuring device based on the stay wire displacement sensor as claimed in claim 1, wherein: the stay cord specifically adopts the steel wire material.
4. A hydraulic support mining height measuring method based on a stay wire displacement sensor is characterized by comprising the following steps: the method comprises the following steps:
s1: calibrating the initial distance of the pull wire displacement sensor and the initial height of the hydraulic support;
the initial calibration in step S1 is as follows: l for distance from center point of steel wire rope outlet of stay wire displacement sensor to center point of pulley0Indicating that the initial height of the hydraulic support is H when the stay wire displacement sensor is calibrated0The extension length of the stay wire displacement sensor is represented by L, and the effective extension length of the stay wire displacement sensor is represented by L-L0Represents;
s2: acquiring the real-time height of the hydraulic support through a stay wire displacement sensor in the hydraulic support mining height measuring device;
s3: the method comprises the steps that after a current signal of a stay wire displacement sensor is collected by a collecting terminal, the actual coal mining height of a hydraulic support is measured and calculated;
the step of measuring and calculating the actual coal mining height of the hydraulic support in the step S3 is as follows:
stay wire displacement sensor steel wire stay cord length LXAnd an output current signal AXThe conversion formula of (c) is as follows:
LX=3/16AX-3/4；
the acquisition terminal acquires a current signal of the stay wire displacement sensor and then calculates the current signal as follows:
effective extension length of stay wire displacement sensor = extension length of stay wire displacement sensor L-distance L from center point of steel wire stay rope outlet of stay wire displacement sensor to center point of pulley0；
The extension length L =3/16A-3/4 of the stay wire displacement sensor, wherein A is the output analog value of the sampling point stay wire displacement sensor;
distance L from center point of steel wire rope outlet of stay wire displacement sensor to center point of pulley0=3/16A0-3/4, wherein A0Outputting an analog quantity value for the default of the calibrated pull wire displacement sensor;
actual mining height of hydraulic support = initial height of hydraulic support (H)0) Effective extension length (L-L) of + stay wire displacement sensor0）；
S4: the acquisition terminal calculates the height of the hydraulic support according to the actual mining height of the hydraulic support, and signals are fed back to each support controller through the acquisition terminal by comparing the height difference of adjacent supports to perform electro-hydraulic control on the support posture;
s5: and the acquisition terminal uploads the actual mining height of the hydraulic support to the cloud platform, the cloud platform calculates the coal amount, and then the dynamic drawing of the coal amount curve is carried out.
5. The hydraulic support mining height measuring method based on the stay wire displacement sensor as claimed in claim 4, wherein the method comprises the following steps: further comprising S6: after the cloud platform receives the height of the hydraulic support, the sinking amount of the top plate is accumulated according to the cycle progress of the working face, and the working face pressure step is measured and calculated in an auxiliary mode.
6. The hydraulic support mining height measuring method based on the stay wire displacement sensor as claimed in claim 4, wherein the method comprises the following steps: the coal amount = actual mining height of the hydraulic support cycle progress working face length specific gravity of the coal.
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