CN111424637B - Dynamic compaction machine and automatic braking system and rammer height detection system thereof - Google Patents
Dynamic compaction machine and automatic braking system and rammer height detection system thereof Download PDFInfo
- Publication number
- CN111424637B CN111424637B CN202010243605.9A CN202010243605A CN111424637B CN 111424637 B CN111424637 B CN 111424637B CN 202010243605 A CN202010243605 A CN 202010243605A CN 111424637 B CN111424637 B CN 111424637B
- Authority
- CN
- China
- Prior art keywords
- rammer
- lifting height
- height
- actual
- preset
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Images
Classifications
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D3/00—Improving or preserving soil or rock, e.g. preserving permafrost soil
- E02D3/02—Improving by compacting
- E02D3/046—Improving by compacting by tamping or vibrating, e.g. with auxiliary watering of the soil
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D5/00—Braking or detent devices characterised by application to lifting or hoisting gear, e.g. for controlling the lowering of loads
- B66D5/02—Crane, lift hoist, or winch brakes operating on drums, barrels, or ropes
- B66D5/24—Operating devices
- B66D5/30—Operating devices electrical
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01B—MEASURING LENGTH, THICKNESS OR SIMILAR LINEAR DIMENSIONS; MEASURING ANGLES; MEASURING AREAS; MEASURING IRREGULARITIES OF SURFACES OR CONTOURS
- G01B21/00—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant
- G01B21/02—Measuring arrangements or details thereof, where the measuring technique is not covered by the other groups of this subclass, unspecified or not relevant for measuring length, width, or thickness
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01L—MEASURING FORCE, STRESS, TORQUE, WORK, MECHANICAL POWER, MECHANICAL EFFICIENCY, OR FLUID PRESSURE
- G01L5/00—Apparatus for, or methods of, measuring force, work, mechanical power, or torque, specially adapted for specific purposes
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B66—HOISTING; LIFTING; HAULING
- B66D—CAPSTANS; WINCHES; TACKLES, e.g. PULLEY BLOCKS; HOISTS
- B66D2700/00—Capstans, winches or hoists
- B66D2700/03—Mechanisms with latches or braking devices in general for capstans, hoists or similar devices as well as braking devices actuated electrically or by fluid under pressure
Landscapes
- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Life Sciences & Earth Sciences (AREA)
- Structural Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Soil Sciences (AREA)
- Agronomy & Crop Science (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Road Paving Machines (AREA)
Abstract
The invention discloses a dynamic compactor rammer height detection system, when a pressure value of a clutch is greater than or equal to a first preset pressure value, a winch starts to rotate, whether the increase rate of the actual output torque of an engine in a preset time period is greater than a preset value or not is judged, if yes, the current moment is used as a lifting zero position where the rammer lifting height is zero, the actual rammer lifting height is recorded through a pulse signal of a pulse sensor, and the dynamic compactor rammer height detection system is simple in structure and convenient to set and maintain. The system judges the lifting zero position by acquiring the actual output torque of the engine control unit to obtain the actual lifting height of the rammer, so that the braking time point of automatic braking can be accurately judged, and the system is low in cost and easy to maintain. The invention also discloses an automatic dynamic compactor detection system comprising the dynamic compactor rammer height detection system and a dynamic compactor, and the dynamic compactor detection system has the technical effects.
Description
Technical Field
The invention relates to the technical field of dynamic compaction machine control, in particular to a system for detecting the height of a rammer of a dynamic compaction machine, and further relates to an automatic braking system and the dynamic compaction machine comprising the system for detecting the height of the rammer.
Background
With the application of the dynamic compactor becoming more and more extensive. In the actual construction of the dynamic compaction machine, the phenomenon of material reduction due to work stealing exists for saving the construction time, and the rammer is released to complete one-time ramming when the lifting height of the rammer does not reach the construction requirement, so that the construction quality does not reach the standard. In order to ensure the construction quality, the construction process is usually supervised by manpower, so that the labor cost is increased and the working efficiency is reduced.
Meanwhile, along with the wide application of the deep dynamic compaction method in the hole, the unhooking-free dynamic compactor is used more and more, and needs to be automatically braked after the rammer falls down and tamps the ground. The automatic braking function needs to detect the height of the rammer, and when the rammer falls to the ground, automatic braking is carried out. Because the sinking amount of the rammer cannot be determined after the rammer of the dynamic compaction machine is rammed on the ground every time, the zero position of the rammer, namely the moment when the rammer leaves the ground, needs to be judged to accurately measure the lifting height of the rammer.
Disclosure of Invention
In view of the above, a first object of the present invention is to provide a system for detecting a height of a ram of a dynamic compactor, so as to solve a problem that a lifting height of an existing ram cannot be determined, which results in that an automatic braking time point cannot be determined.
In order to achieve the first object, the invention provides the following technical scheme:
a dynamic compactor ram height detection system, comprising:
the pressure detection device is arranged on the clutch and used for detecting the pressure value of the clutch;
the device comprises a displacement detection plate arranged on a main winch of the dynamic compactor and a pulse sensor assembly arranged on a fixed support of the main winch, wherein the pulse sensor assembly is used for reading the rotation state of the displacement detection plate and sending a pulse signal to a main control device;
the main control device is connected with the engine control unit to obtain actual output torque of the engine, and when the pressure value of a clutch of the pressure detection device is greater than or equal to a first preset pressure value, the main control device judges whether the increase rate of the actual output torque of the engine in a preset time period is greater than a preset increase rate value, if so, the current moment is used as a lifting zero position of the lifting height of the rammer to be zero, and the actual lifting height of the rammer is recorded according to a pulse signal of the pulse sensor component.
Preferably, the pulse sensor assembly comprises:
a first pulse sensor and a second pulse sensor;
the main control device is also used for obtaining the actual lifting height of the first rammer according to the first pulse number and the first frequency of the first pulse sensor; obtaining the actual lifting height of the second rammer according to the second pulse number and the second frequency of the second pulse sensor; and carrying out data processing according to the first rammer actual lifting height and the second rammer actual lifting height to obtain the rammer actual lifting height.
Preferably, the master control device is further configured to:
and judging whether the first frequency and the second frequency are equal, if so, the actual lifting height of the rammer is the average value between the actual lifting height of the first rammer and the actual lifting height of the second rammer.
Preferably, the master control device is further configured to:
judging whether the first frequency and the second frequency are equal, if not, comparing the first frequency and the second frequency with a preset frequency range respectively;
when the first frequency is not within the preset frequency range, judging that the first pulse sensor is in fault, and triggering a first alarm device to alarm; the actual lifting height of the rammer is the actual lifting height of the second rammer;
when the second frequency is not within the preset frequency range, judging that the second pulse sensor is in fault, and triggering a second alarm device to alarm; the actual ram lifting height is the first actual ram lifting height.
Preferably, the master control device is further configured to:
and judging whether the actual lifting height of the rammer is equal to a preset height or not, and if so, controlling a height indicating lamp to start.
Preferably, the master control device is further configured to:
and judging whether the increase rate of the actual output torque of the engine in a preset time period is greater than a preset increase rate value, if so, taking the current moment as a lifting zero position of the rammer with zero lifting height, and controlling a zero position indicator lamp to start.
The invention also provides an automatic braking system of the dynamic compactor, which comprises the dynamic compactor hammer height detection system according to any one of the embodiments, and further comprises:
the rammer actual lifting height processing module is used for controlling the clutch to act the rammer to fall and respectively recording the falling distance of the rammer and the rope outlet amount of the steel wire rope of the main winch according to the pulse signal of the pulse sensor assembly when the actual lifting height of the rammer is equal to the preset height;
the rammer falling distance processing module is used for controlling the steel wire rope of the main winch to continuously fall when the rammer falling distance is equal to the actual lifting height of the rammer;
and the brake control module is used for braking when the difference between the rope outlet amount of the steel wire rope of the main winch and the actual lifting height of the rammer is equal to a preset delay brake distance.
The invention provides a dynamic compactor comprising the dynamic compactor hammer height detection system according to any one of the above embodiments.
The invention provides a dynamic compactor rammer height detection system, which comprises a pressure detection device, a speed sensor and a speed sensor, wherein the pressure detection device is arranged on a clutch and is used for detecting the pressure value of the clutch; the device comprises a displacement detection plate arranged on a main winch of the dynamic compactor and a pulse sensor assembly arranged on a fixed support of the main winch, wherein the pulse sensor assembly is used for reading the rotation state of the displacement detection plate and sending a pulse signal to a main control device; the main control device is connected with the engine control unit to acquire actual output torque of the engine, and when the pressure value of a clutch of the pressure detection device is greater than or equal to a first preset pressure value, the main control device judges whether the increase rate of the actual output torque of the engine in a preset time period is greater than a preset increase rate value, if so, the current moment is taken as a lifting zero position of which the lifting height of the rammer is zero, and the actual lifting height of the rammer is recorded according to a pulse signal of the pulse sensor component.
By applying the dynamic compactor rammer height detection system provided by the invention, when the pressure value of the clutch is greater than or equal to the first preset pressure value, the winch starts to rotate, whether the increase rate of the actual output torque of the engine in a preset time period is greater than a preset value is judged, if yes, the current moment is taken as a lifting zero position at which the rammer lifting height is zero, and the actual rammer lifting height is recorded through the pulse signal of the pulse sensor. The system judges the lifting zero position by acquiring the actual output torque of the engine control unit to obtain the actual lifting height of the rammer, so that the braking time point of automatic braking can be accurately judged, and the system is low in cost and easy to maintain.
In order to achieve the second object, the invention further provides an automatic braking system of the dynamic compactor, wherein the dynamic compactor comprises any one of the dynamic compactor height detection systems, and the dynamic compactor height detection system has the technical effects.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a system for detecting the height of a rammer of a dynamic compactor according to an embodiment of the present invention.
The drawings are numbered as follows:
the device comprises an engine control unit 1, a first pulse sensor 2, a second pulse sensor 3, an indicator lamp 4, a main control device 5 and a pressure sensor 6.
Detailed Description
The embodiment of the invention discloses a system for detecting the height of a rammer of a dynamic compaction machine, which aims to solve the problem that the automatic braking time point cannot be determined due to the fact that the lifting height of the existing rammer cannot be determined.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural diagram of a system for detecting a height of a rammer of a dynamic compactor according to an embodiment of the present invention.
In a specific embodiment, the invention provides a system for detecting the height of a rammer of a dynamic compactor, which comprises:
the pressure detection device is arranged on the clutch and used for detecting the pressure value of the clutch;
pressure detection device generally sets up to pressure sensor 6, and pressure sensor 6 sets up on the oil circuit of clutch, preferably detachable fixed connection, and operating personnel operates the lifting handle and makes interior bloated clutch be in the combined state, and main control unit 5 reads interior bloated clutch pressure value through pressure detection device, and when clutch pressure value more than or equal to first preset pressure value, the hoist began corotation.
The device comprises a displacement detection plate arranged on a main winch of the dynamic compactor and a pulse sensor assembly arranged on a fixed support of the main winch, wherein the pulse sensor assembly is used for reading the rotation state of the displacement detection plate and sending a pulse signal to a main control device 5;
and sending a pulse signal to the main control device 5 through a cable to calculate the displacement of the rammer.
The displacement detection plate is detachably and fixedly connected with the main winch of the dynamic compaction machine, and is fixed through a screw if the displacement detection plate is fixed through the screw. In one embodiment, the pulse sensor assembly includes two or more pulse sensors, preferably two pulse sensors, which are respectively disposed at both sides of the displacement detecting plate to respectively transmit pulse signals to the main control device 5 according to the rotation state of the displacement detecting plate. Wherein, the pulse sensor is connected with the main control device 5 through a cable.
The main control device 5 is connected with the pressure detection device and the pulse sensor assembly respectively, the main control device 5 is connected with the engine control unit 1 to obtain actual output torque of the engine, when the pressure value of a clutch of the pressure detection device is larger than or equal to a first preset pressure value, the main control device 5 judges whether the increase rate of the actual output torque of the engine in a preset time period is larger than a preset increase rate value, if yes, the current moment is used as a lifting zero position of the rammer with zero lifting height, and the actual lifting height of the rammer is recorded according to a pulse signal of the pulse sensor assembly.
The master control device 5 may be specifically configured as a master control device such as a master control chip or an integrated instrument, the master control device 5 is connected to the pressure detection device and the displacement detection device through cables, and the master control device 5 is connected to the engine control unit 1 through a CAN bus. The first predetermined pressure value may be set according to a predetermined calculation, and similarly, the predetermined value of the increase rate of the actual output torque of the engine within the predetermined time period is also predetermined, it is understood that the predetermined time period is generally within 1 second, such as 0.3-0.8 milliseconds, so as to improve the calculation accuracy, and in an embodiment, the increase rate within the second five seconds is 50%, and then the time of the second five seconds is taken as a zero-lifting position where the lifting height of the ram is zero.
The specific working process is as follows: the rammer is on ground, operating personnel operates the lifting handle to make the internal expansion clutch be in a combined state, main control unit 5 reads the internal expansion clutch pressure value through pressure sensor 6 and reaches a first preset pressure value, namely the hoisting lifting set value, at the moment, the hoisting starts corotation, main control unit 5 records the hoisting rotation displacement through the displacement detection device, when the hoisting rotates to eliminate redundant rope discharge amount, the rammer is lifted, at the moment, the engine load is increased instantaneously due to the gravity of the rammer, the output torque is increased for keeping the rotating speed constant, therefore, the increase rate of the actual output torque of the engine in a preset time period is larger than the increase rate preset value, the current moment is used as the lifting zero position of the rammer with zero lifting height, and the actual lifting height of the rammer is recorded. The main control device 5 is connected with the engine control unit 1 through a CAN bus to collect the actual output torque of the engine, and lights a zero indicator lamp 4 to prompt an operator, and if the actual height of the system fault rammer is not at the zero position, the operator CAN stop the machine for detection, so that the operation safety is improved.
By applying the dynamic compactor rammer height detection system provided by the invention, when the pressure value of the clutch is greater than or equal to the first preset pressure value, the winch starts to rotate, whether the increase rate of the actual output torque of the engine in a preset time period is greater than a preset value is judged, if yes, the current moment is taken as a lifting zero position at which the rammer lifting height is zero, and the actual rammer lifting height is recorded through the pulse signal of the pulse sensor. The system judges the lifting zero position by acquiring the actual output torque of the engine control unit 1 to obtain the actual lifting height of the rammer, so that the braking time point of automatic braking can be accurately judged, and the system is low in cost and easy to maintain.
Preferably, the pulse sensor assembly comprises:
a first pulse sensor 2 and a second pulse sensor 3;
the main control device 5 is also used for obtaining the actual lifting height of the first rammer according to the first pulse number n1 and the first frequency f1 of the first pulse sensor 2; obtaining the actual lifting height of the second rammer according to the second pulse number n2 and the second frequency f2 of the second pulse sensor 3; and carrying out data processing according to the first rammer actual lifting height and the second rammer actual lifting height to obtain the rammer actual lifting height.
In one embodiment, the actual lifting height of the rammer is obtained by averaging the actual lifting height of the first rammer and the actual lifting height of the second rammer, or the main control device 5 obtains the actual lifting height h of the rammer as (N1+ N2)/2N pi d according to the first pulse number N1 and the second pulse number N2, wherein N is the number of circular holes of the displacement detection plate, d is the winding diameter, and the actual lifting height of the rammer is calculated by the average value of the pulse numbers of the two sensors, so that the measurement accuracy is improved.
Further, the main control device 5 is further configured to:
judging whether the first frequency and the second frequency are equal, if not, comparing the first frequency and the second frequency with a preset frequency range respectively;
when the first frequency is not within the preset frequency range, judging that the first pulse sensor 2 has a fault, and triggering a first alarm device to alarm; the actual lifting height of the rammer is the actual lifting height of the second rammer;
when the second frequency is not within the preset frequency range, judging that the second pulse sensor 3 has a fault, and triggering a second alarm device to alarm; the actual ram lifting height is the first actual ram lifting height.
When the first frequency and the second frequency are not equal, judging that one pulse sensor has a fault, comparing the first frequency and the second frequency with a preset frequency range respectively to judge the fault sensor, calculating the actual lifting height of the rammer according to the pulse signals of the undamaged pulse sensors, triggering an alarm device to give an alarm, wherein the alarm device can remind a worker to replace the sensor in time by outputting characters on a display screen and buzzing the alarm to give an alarm,
further, the main control device 5 is further configured to:
judging whether the actual lifting height of the rammer is equal to a preset height or not, and if so, controlling a height indicator lamp 4 to start;
and judging whether the increase rate of the actual output torque of the engine in a preset time period is greater than a preset increase rate value, if so, taking the current moment as a lifting zero position of which the lifting height of the rammer is zero, and controlling a zero position indicator lamp 4 to start so as to remind a worker.
The main control device 5 is respectively connected with a height indicator lamp 4 and a zero indicator lamp 4, when the actual lifting height of the rammer is equal to the preset prompting height, the rammer reaches the set height, the height indicator lamp 4 is lightened to remind a worker, and the height indicator lamp 4 is extinguished after the rammer falls down.
The system judges the lifting zero position by acquiring the actual output torque value of the ECU engine; detecting the rotation state of the winch through a double-pulse sensor, and calculating the lifting height of the rammer through an instrument; the measurement precision is improved by a double-pulse sensor self-checking method, the use safety and reliability are ensured, the cost is reduced, and the maintenance is easy. In the main winch rotation process, two pulse sensors simultaneously generate signals with the frequency consistent with the pulse number, the frequency of the two pulse sensors is compared with a preset frequency range to obtain a fault sensor, the lifting height of the rammer is measured by a double-pulse sensor calibration method, and whether the sensor fails or not is judged; and judging a faulty sensor by a double-pulse sensor self-checking method, and automatically switching the undamaged sensor to be used as a measuring signal.
The zero calibration is realized by directly reading the actual output torque of the engine without additionally installing a sensor, so that the cost is low and the maintenance is easy; in addition, the double-pulse sensor measures the actual lifting height of the rammer, and the signal error is reduced to 0.5 detection plate hole distance through the average value calculation of the number of double pulses, so that the measurement precision is improved; the double-pulse sensor self-checking method can judge a fault sensor in time and prompt an operator, so that the use safety is improved; meanwhile, most construction sites of the dynamic compaction machine are in remote areas, if the sensors fail, the sensors cannot be replaced in time, so that the construction site is shut down, the double-pulse sensor measuring system can be automatically switched into a single-pulse sensor for detection, the construction efficiency is improved, and the maintenance is convenient.
The invention also provides an automatic braking system of the dynamic compactor, which comprises the dynamic compactor rammer height detection system according to any one of the embodiments, wherein the main control device 5 of the dynamic compactor rammer rigidity detection system is used for:
the rammer actual lifting height processing module is used for controlling the clutch to act the rammer to fall and respectively recording the falling distance of the rammer and the rope outlet amount of the steel wire rope of the main winch according to the pulse signal of the pulse sensor assembly when the actual lifting height of the rammer is equal to the preset height;
the rammer falling distance processing module is used for controlling the steel wire rope of the main winch to continuously fall when the rammer falling distance is equal to the actual lifting height of the rammer;
and the brake control module is used for braking when the difference between the rope outlet amount of the steel wire rope of the main winch and the actual lifting height of the rammer is equal to the preset delay brake distance.
During the process that the rammer is continuously lifted off the ground, the actual lifting height H1 of the rammer is recorded, when the actual lifting height H1 of the rammer is equal to the preset height, the output signal lights up the height indicator lamp 4, the expanding clutch in the lifting handle is loosened to be disengaged, the rammer begins to fall, the signal of the pressure detection device is zero at the moment, the hoisting rotation displacement is judged to be the falling distance of the rammer, the falling distance H2 of the rammer and the rope outlet amount of the steel wire rope of the main winch are recorded according to the pulse signal of the pulse sensor component, when H1-H2 is equal to 0, the rammer is judged to reach the zero position, the steel wire rope continues to fall in order to improve the safety without losing kinetic energy, the displacement after the zero position is set as the redundant rope outlet amount H3 is equal to H2-H1, namely the difference between the rope outlet amount of the steel wire rope of the main winch and the actual lifting height of the rammer, when the difference is equal to the preset extension braking distance L1, the brake is carried out, and the extension braking distance L1 can be set according to different actual lifting heights of the rammer.
Further, the main control device 5 is specifically configured to:
when the difference between the rope outlet quantity of the steel wire rope of the main winch and the actual lifting height of the rammer is equal to the preset delay braking distance, outputting a current signal according to a preset current signal change curve to control the braking pressure of a braking device to decelerate;
when the rope outlet quantity of the steel wire rope of the main winch is equal to the construction preset rope outlet quantity, the control current signal is output according to the maximum value of the preset current signal change curve to control the brake device to be locked.
The current signal change curve is preset through the setting so that the braking process is relaxed, the service life of the steel wire rope is prolonged, the braking process is divided into deceleration and locking, the rope outlet quantity is preset during construction and can be set as required, and therefore the braking process is relaxed, the braking impact is reduced, the service life of the steel wire rope is prolonged, and the driving experience is improved.
In one embodiment, the master control device 5 is further configured to:
when the rope outlet amount of the steel wire rope of the main winch is equal to the construction preset rope outlet amount, the current signal is controlled to output brake locking according to the maximum value of the change curve of the preset current signal, the actual rope outlet amount of the steel wire rope of the current main winch is recorded, and when a first deviation value between the actual rope outlet amount of the steel wire rope of the main winch and the construction preset rope outlet amount is not zero, the next preset delay brake distance is a difference value between the preset delay brake distance and the first deviation value.
The system finishes automatic braking, after the main winch stops rotating, the actual rope outlet amount L3 of the steel wire rope of the current main winch is recorded, due to abrasion of a brake pad and the response time of a hydraulic system, deviation possibly exists between the actual rope outlet amount L3 of the steel wire rope and the construction preset rope outlet amount, when the first deviation value of the actual rope outlet amount L3 of the steel wire rope and the construction preset rope outlet amount is equal to zero, the main control device 5 does not process the deviation, and the system still controls braking according to the last preset delay braking distance; when the first deviation value is not zero, the control device adjusts the next preset delay braking distance into the difference value between the preset delay braking distance and the first deviation value when the system brakes for the next time, the steps are sequentially circulated, and the system automatically adjusts the signal output time point through the comparison between the actual braking distance and the target braking distance, so that the braking distance is kept stable, and the service life of the brake pad is prolonged.
The system actually lifts the height and automatically adjusts the braking distance through the rammer, and simultaneously presets a delayed braking distance self-checking control mode to enable the rope outlet amount to be kept stable, so that the service life of the brake pad is prolonged, the maintenance cost is reduced, the purpose of moderating the braking process is achieved through the change curve of the braking signal, and the service life of the steel wire rope is prolonged.
Further, the system further comprises:
a brake device connected with the main control device 5;
the brake device comprises an electro-hydraulic proportional valve connected with the main control device 5 through a cable and a disc brake connected with the electro-hydraulic proportional valve.
Wherein the structure of dish brake and the position that sets up on dynamic compactor can set up according to prior art, realize automatic braking through the electric-hydraulic proportional valve, and master control set 5 controls brake pressure through presetting current signal variation curve, according to the position control brake signal output curve of ram.
Specifically, the pulse sensor assembly includes:
the device comprises a displacement detection plate arranged on a main winch of the dynamic compaction machine and a pulse sensor arranged on a fixed support of the main winch, wherein the pulse sensor is used for reading the rotation state of the displacement detection plate and sending a pulse signal to the main control device 5.
And sending a pulse signal to the main control device 5 through a cable to calculate the displacement of the rammer.
The displacement detection plate is detachably and fixedly connected with the main winch of the dynamic compaction machine, for example, the displacement detection plate is fixed through a screw. The pulse sensor may also be provided as another type of sensor.
The system compares the actual value of the braking distance with the target value through closed-loop detection, and adjusts the automatic braking time point to keep the braking distance stable, and the system does not need to additionally install a sensor and directly realizes zero calibration in a mode of reading the actual output torque of the engine, so that the cost is low and the maintenance is easy; by setting the relation between the actual lifting height of the rammer and the braking distance, the system automatically adjusts the braking distance according to the height of the rammer in the working process, so that the use is convenient, and the working efficiency is improved; the system brake adopts the proportional solenoid valve, sets for the relation of actual play rope volume and instrument electric current, divide into two stages of speed reduction and locking with the braking process, makes the braking process alleviate and reduces the brake and strike, increases wire rope life, improves and drives experience. In addition, the unhooking-free dynamic compaction machine has high automatic braking frequency, the brake pad is easy to wear, the mechanical gap of the brake is increased, the rope outlet amount of the brake steel wire rope is unstable, the brake pad needs to be frequently replaced to maintain the stable rope outlet amount, the maintenance cost is high, and the construction efficiency is low; the invention keeps the rope outlet quantity stable by automatically detecting the actual rope outlet quantity and automatically adjusting the braking time point, prolongs the service life of the brake pad and improves the construction efficiency.
Based on the system for detecting the height of the rammer of the dynamic compactor provided in the above embodiment, the invention further provides a dynamic compactor, which includes any one of the systems for detecting the height of the rammer of the dynamic compactor in the above embodiments, and as the system for detecting the height of the rammer of the dynamic compactor in the above embodiments is adopted in the dynamic compactor, the beneficial effects of the dynamic compactor refer to the above embodiments.
The embodiments in the present description are described in a progressive manner, each embodiment focuses on differences from other embodiments, and the same and similar parts among the embodiments are referred to each other.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. Various modifications to these embodiments will be readily apparent to those skilled in the art, and the generic principles defined herein may be applied to other embodiments without departing from the spirit or scope of the invention. Thus, the present invention is not intended to be limited to the embodiments shown herein but is to be accorded the widest scope consistent with the principles and novel features disclosed herein.
Claims (4)
1. The utility model provides a dynamic compactor ram height detection system which characterized in that includes:
the pressure detection device is arranged on the clutch and used for detecting the pressure value of the clutch;
the pulse sensor assembly comprises a first pulse sensor and a second pulse sensor, and the pulse sensor assembly is used for reading the rotation state of the displacement detection plate and sending a pulse signal to a main control device;
the main control device is respectively connected with the pressure detection device and the pulse sensor assembly, the main control device is connected with the engine control unit to obtain the actual output torque of the engine, and the main control device is used for:
when the pressure value of a clutch of the pressure detection device is larger than or equal to a first preset pressure value, judging whether the increase rate of the actual output torque of the engine in a preset time period is larger than a preset increase rate value, if so, taking the current moment as a lifting zero position with zero lifting height of the rammer, and recording the actual lifting height of the rammer according to a pulse signal of the pulse sensor component;
obtaining the actual lifting height of the first rammer according to the first pulse number and the first frequency of the first pulse sensor; obtaining the actual lifting height of the second rammer according to the second pulse number and the second frequency of the second pulse sensor; performing data processing according to the first rammer actual lifting height and the second rammer actual lifting height to obtain the rammer actual lifting height;
judging whether the first frequency and the second frequency are equal, if so, the actual lifting height of the rammer is an average value between the actual lifting height of the first rammer and the actual lifting height of the second rammer; if not, comparing the first frequency and the second frequency with a preset frequency range respectively, and when the first frequency is not in the preset frequency range, judging that the first pulse sensor has a fault and triggering a first alarm device to alarm; the actual lifting height of the rammer is the actual lifting height of the second rammer, and when the second frequency is not within the preset frequency range, the second pulse sensor is judged to be in fault, and a second alarm device is triggered to give an alarm; the actual lifting height of the rammer is the actual lifting height of the first rammer;
and judging whether the actual lifting height of the rammer is equal to a preset height or not, and if so, controlling a height indicating lamp to start.
2. The dynamic compactor ram height detection system of claim 1, wherein the master control device is further configured to:
and judging whether the increase rate of the actual output torque of the engine in a preset time period is greater than a preset increase rate value, if so, taking the current moment as a lifting zero position of the rammer with zero lifting height, and controlling a zero position indicator lamp to start.
3. An automatic braking system of a dynamic compactor, characterized by comprising the dynamic compactor hammer height detection system according to claim 1 or 2, and further comprising:
the rammer actual lifting height processing module is used for controlling the clutch to act the rammer to fall and respectively recording the falling distance of the rammer and the rope outlet amount of the steel wire rope of the main winch according to the pulse signal of the pulse sensor assembly when the actual lifting height of the rammer is equal to the preset height;
the rammer falling distance processing module is used for controlling the steel wire rope of the main winch to continuously fall when the rammer falling distance is equal to the actual lifting height of the rammer;
and the brake control module is used for braking when the difference between the rope outlet amount of the steel wire rope of the main winch and the actual lifting height of the rammer is equal to a preset delay brake distance.
4. A dynamic compactor comprising a dynamic compactor ram height detection system according to claim 1 or 2.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010243605.9A CN111424637B (en) | 2020-03-31 | 2020-03-31 | Dynamic compaction machine and automatic braking system and rammer height detection system thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010243605.9A CN111424637B (en) | 2020-03-31 | 2020-03-31 | Dynamic compaction machine and automatic braking system and rammer height detection system thereof |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| CN111424637A CN111424637A (en) | 2020-07-17 |
| CN111424637B true CN111424637B (en) | 2021-09-07 |
Family
ID=71551750
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202010243605.9A Active CN111424637B (en) | 2020-03-31 | 2020-03-31 | Dynamic compaction machine and automatic braking system and rammer height detection system thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN111424637B (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113591026B (en) * | 2021-08-06 | 2024-05-24 | 杭叉集团股份有限公司 | Dynamic compactor rammer lifting height detection system and calculation method for multi-layer rope winding of main winch |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2393992B1 (en) * | 2009-02-06 | 2013-07-31 | Mario Prütz | Free falling hammer with an eddy current brake |
| CN103510503A (en) * | 2013-09-30 | 2014-01-15 | 中国地质大学（北京） | Method for monitoring rammed point soil stabilization state vibration in real time |
| KR20150130091A (en) * | 2014-05-13 | 2015-11-23 | 한미기초건설 주식회사 | system for measuring free falling impulse energy of weight |
| CN106149671A (en) * | 2015-03-23 | 2016-11-23 | 徐工集团工程机械股份有限公司 | The control system of dynamic compaction machinery automatic job and method and dynamic compaction machinery |
| CN107964955A (en) * | 2017-11-28 | 2018-04-27 | 王继忠 | A kind of self-operated measuring unit and method for automatic measurement for ramming pile penetration |
| CN110616702A (en) * | 2019-09-25 | 2019-12-27 | 机械工业勘察设计研究院有限公司 | System and method for monitoring construction quality of compaction pile |
-
2020
- 2020-03-31 CN CN202010243605.9A patent/CN111424637B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP2393992B1 (en) * | 2009-02-06 | 2013-07-31 | Mario Prütz | Free falling hammer with an eddy current brake |
| CN103510503A (en) * | 2013-09-30 | 2014-01-15 | 中国地质大学（北京） | Method for monitoring rammed point soil stabilization state vibration in real time |
| KR20150130091A (en) * | 2014-05-13 | 2015-11-23 | 한미기초건설 주식회사 | system for measuring free falling impulse energy of weight |
| CN106149671A (en) * | 2015-03-23 | 2016-11-23 | 徐工集团工程机械股份有限公司 | The control system of dynamic compaction machinery automatic job and method and dynamic compaction machinery |
| CN107964955A (en) * | 2017-11-28 | 2018-04-27 | 王继忠 | A kind of self-operated measuring unit and method for automatic measurement for ramming pile penetration |
| CN110616702A (en) * | 2019-09-25 | 2019-12-27 | 机械工业勘察设计研究院有限公司 | System and method for monitoring construction quality of compaction pile |
Non-Patent Citations (1)
| Title |
|---|
| 强夯机自动起升与强夯系统研究;任良才、唐建林;《建筑机械化》;20190228;第30-32页 * |
Also Published As
| Publication number | Publication date |
|---|---|
| CN111424637A (en) | 2020-07-17 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| AU2014328348B2 (en) | Method and apparatus for monitoring displacement adjustment state of steel rope tension balancing of multi-rope hoist | |
| CN111424637B (en) | Dynamic compaction machine and automatic braking system and rammer height detection system thereof | |
| US10196247B2 (en) | Electric winch device | |
| CN108059048B (en) | Detection early warning system and early warning method for elevator brake | |
| CN111424638B (en) | Automatic braking method and system for dynamic compaction machine | |
| EP3173368B1 (en) | Electric winch device | |
| AU2004277722A1 (en) | Electronic winch monitoring system | |
| CN112919276B (en) | Elevator reliability ground equivalent verification system and method | |
| CN105621185A (en) | Test self-checking device and method for rack-type construction hoist braking torque | |
| CN110282552B (en) | Crown block early warning system | |
| CN113247809A (en) | Crane type vibroflotation device winch control system and control method | |
| US20140138865A1 (en) | Method of Controlling a Pellet Mill | |
| CN216586704U (en) | Vertical bearing capacity detection device of pile foundation for building engineering | |
| CN202757776U (en) | Brake torsional fatigue tester | |
| CN102849642B (en) | A kind of hydraulic winch structure control method and system | |
| CN105174064A (en) | Crane machinery brake self-check method and crane machinery brake self-check device | |
| CN203534569U (en) | Dynamic compaction machine and ramming depth detection device | |
| JPH05246635A (en) | Braking property monitor of elevator | |
| CN216560061U (en) | Novel pressure measuring device | |
| CN212101526U (en) | Elevator brake testing device | |
| CN105314486A (en) | Measurement method for braking force of elevator brake | |
| CN103196664A (en) | Hydraulic power plant mechanical hydraulic pressure over-speed protection device simulation test platform and test method | |
| CN103486994A (en) | Dynamic compaction machine as well as ramming depth detection device and method | |
| CN111320048A (en) | Elevator brake testing device and testing method thereof | |
| CN110386531A (en) | A kind of anti-falling safety device pre-tightens automatically and resets system |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| GR01 | Patent grant | ||
| GR01 | Patent grant |