CN2708272Y - Loader electronic weighing device - Google Patents
Loader electronic weighing device Download PDFInfo
- Publication number
- CN2708272Y CN2708272Y CN 200420060143 CN200420060143U CN2708272Y CN 2708272 Y CN2708272 Y CN 2708272Y CN 200420060143 CN200420060143 CN 200420060143 CN 200420060143 U CN200420060143 U CN 200420060143U CN 2708272 Y CN2708272 Y CN 2708272Y
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- shovel loader
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- singlechip cpu
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Abstract
The utility model relates to a loader electronic weighing device, which is characterized in that a pressure sensor with measuring temperature function is arranged on the pipeline of the high and low pressure chamber of any one oil cylinder in the two mobile arm raising oil cylinders of the loader. A sensor for measuring the movement speed of the raising mobile arm is arranged on the front frame of the loader; a tilting counter is installed on a tilting oil cylinder. A main electric apparatus with a CPU is installed on the instrument table of the driver's room. And a printer is arranged. The sensors and the tilting counter are directly mutually connected with the main electric apparatus through electric cables and interfaces. The device has the characteristics that the software compensating of pressure signals, temperature signals and speed signals is carried out through the main electric apparatus, and the loader weighing is ensured to have higher dynamic weighing precision. The main electric apparatus has stronger displaying function, inquiring function, editing function, warning function and printing function.
Description
Technical field
The utility model relates to the shovel loader electronic weighing device, and shovel loader weight of material in loading and unloading can be to the shovel loader bucket during loose unpacked material is measured automatically.The driver is in loading and unloading during material, without any need for additional operations, and the bucket number and the general assembly (TW) that can show the monobucket weight of material on the display of main electrical equipment and load and unload.If after having preset desire dress general assembly (TW), display shows the general assembly (TW) of successively decreasing simultaneously.
Background technology
The loader weighing apparatus of prior art shows according to available data, and pressure transducer generally adopts hardware compensating to Temperature Compensation, and its shortcoming is that temperature compensation range is narrow, and the working oil temperature that can not be suitable for shovel loader is from-20 ℃～100 ℃ variation ranges.Available data is not mentioned to carry out the computer software compensation to the loading arm pulling speed to tipping bucket weight, therefore influences the dynamic weighing precision under the various pulling speeies greatly.
Summary of the invention
The purpose of this utility model is to overcome above-mentioned shortcoming, and a kind of shovel loader electronic weighing device is provided.
See Fig. 1, the shovel loader electronic weighing device is characterized in that:
Install on the pipeline in the high-low pressure chamber of any oil cylinder in two swing arm lift cylinders of shovel loader and have big cavity pressure sensor and the loculus pressure transducer of measuring temperature function; The pulling speed sensor is installed on the front frame of shovel loader; Tipping bucket bucket counter is installed on the dump ram of shovel loader; Big cavity pressure sensor, loculus pressure transducer, pulling speed sensor, tipping bucket bucket counter directly link to each other with main electrical equipment with interface by cable; Main electrical equipment is core with the singlechip CPU; The shell that main electrical equipment is installed is arranged;
See Fig. 2, main electrical equipment comprises:
Big cavity pressure sensor interface filtering circuit (1) connects amplification and A/D change-over circuit (2), connects singlechip CPU then; Loculus pressure sensor interface filtering circuit (3) connects amplification and A/D change-over circuit (4), connects singlechip CPU then; Tipping bucket bucket counter interface connects anti-interference buffer circuit (5), connects singlechip CPU then; The pulling speed sensor interface connects anti-interference buffer circuit (6), connects singlechip CPU then; Singlechip CPU is connected with data storing circuit, clock circuit, keyboard and backlight circuit, printer circuitry, anti-overvoltage mu balanced circuit, LCD display circuit respectively; The LCD display circuit is connected with LCDs;
Main electrical equipment adopts singlechip CPU control, utilizes software to pressure signal, temperature signal, handle automatically:
Have big cavity pressure sensor and the loculus pressure transducer of measuring temperature function and record big cavity pressure temperature signal and loculus pressure and temp signal respectively, divide two-way to pass through separately 16 A/D converters of interface circuit, filtering circuit, high precision respectively, coupling by software is amplified, carry out the pressure data compensation by software, be converted to big cavity pressure temperature digital signal and loculus pressure and temp digital signal, two ways of digital signals is sent into singlechip CPU again and is carried out data processing, control weighing measurement precision.
Described shovel loader electronic weighing device is characterized in that:
Singlechip CPU is selected the integrated circuit of 89C51RD2FN model for use, and amplification and A/D change-over circuit are selected the integrated circuit of AD7705 model for use, and the data storing circuit is selected the integrated circuit of X5645 model for use, and LCDs is selected 128 * 128 dot matrix for use.
Described shovel loader electronic weighing device, it is characterized in that: the pulling speed sensor is in the plumbous box of the die casting of a water-tight device two probes of being made by tongue tube to be installed, between two probes spacing is arranged, the pulling speed sensor maintains static by the fore-stock that support is installed in shovel loader; When the process of the permanent magnet on the swing arm that is installed in shovel loader speed pickup, two probes send switching signal respectively, by interface and anti-interference and the buffering circuit (6) enter single-chip microcomputer, single-chip microcomputer is according to the time of magnet by two probes, calculate the speed of swing arm motion, the speed parameter has been arranged, carried out velocity compensation by the heavy amount of software symmetry.
Advantage and effect:
This apparatus features is: can the Chinese display menu on display screen; Can edit name driver, license number; Demonstration, storage, printing function are perfect; LCDs and guidance panel all have the night time operation of being convenient to backlight; Have fault and wrong way alarm function; Because pressure, temperature, rate signal data have been carried out software compensation, the system accuracy height is 0.5%～1%F.S.
Main electrical equipment adopts singlechip CPU control, utilizes software that pressure signal, temperature signal, swing arm movement velocity are handled automatically.The weight of material under the situation of a certain movement velocity, is directly proportional with the mean value of pressure reduction in a certain position of lift cylinder high-low pressure in the shovel loader bucket.But the swing arm pulling speed of shovel loader changes with the variation of the size of the rotating speed of engine, fuel delivery.The pressure reduction of the big loculus of lift cylinder is respective change also, and the oil temperature of shovel loader is different with intensity with the shovel loader working time, and oily temperature can be raised to 100 ℃ from-20 ℃, and the variation of oil temperature causes that lift cylinder size cylinder pressure transducer produces very big temperature and wafts.Therefore the key that improves measuring accuracy is how to solve oil temperature, the influence of pulling speed to weighing.
Be subjected to the warm influence of oil for solving the shovel loader electronic weighing device, the pressure transducer with measurement temperature function is installed on the pipeline in the high-low pressure chamber of any oil cylinder in two swing arm lift cylinders of shovel loader.Big cavity pressure temperature signal and loculus pressure and temp signal, divide two-way to pass through interface circuit, filtering circuit, 16 A/D converters of high precision (AD7705) respectively, coupling by software is amplified, be converted to big cavity pressure, temperature digital signal and loculus pressure and temp, digital signal, two ways of digital signals is sent into single-chip microcomputer 89C51RD2FN again and is carried out data processing.Two pressure transducers all adopt the constant current circuit power supply.The G3 key of push panel, input password enter pressure and temp compensation menu, carry out pressure, temperature compensation by the requirement of menu.Pressure and temp amount after the compensation is sent into EEPROMX5645 and is stored.Computing machine is followed the tracks of pressure, the temperature of actual measurement all the time in measuring process, carries out data processing, and temperature can be controlled in 0.2%F.S-20 ℃～100 ℃ variation range internal pressure precision.
Be the solution influence of material of weighing with the oil cylinder movement velocity, be provided with the pulling speed sensor in the utility model, the pulling speed sensor is in the plumbous box of the die casting of a water-tight device two probes of being made by tongue tube to be installed, and the spacing between two probes is 50mm.This sensor maintains static by the fore-stock that support is installed in shovel loader.When the process speed pickup of the permanent magnet on the swing arm that is installed in shovel loader (distance of reaction is 20+5mm), two probes send switching signal respectively, by interface and anti-interference and the buffering circuit enter single-chip microcomputer, single-chip microcomputer calculates the speed of swing arm motion according to the time of magnet by two probes.The speed parameter has been arranged, carried out velocity compensation by the heavy amount of software symmetry.
The velocity compensation program just can access by operation push-button G2 and input password.This velocity compensation program is divided 3 subroutines, and chooser program 1 can be carried out " large, medium and small " three velocity compensations to the empty bucket of scraper bowl weight.Chooser program 2 can be carried out " large, medium and small " three velocity compensations to standard weights known in the scraper bowl.Chooser program 3 can be finely tuned correction to " large, medium and small " three velocity compensation results.Various physical quantitys after the velocity compensation deposit EEPROMX5645 voluntarily in.Press G1 key chooser program 2, can observe the parameter that compensates among the EEPROMX5645.
Main electrical equipment has many functions, except main interface display weighing results, enters zero setting (peeling) display interface by zero setting (peeling) button.By button and Password Operations, can inquire about temperature compensation result, velocity compensation result, current travelling speed and temperature value; Whether size cavity pressure sensor is working properly, and whether pulling speed sensor and tipping bucket bucket counter be working properly; The skew of empty bucket weight; Maloperation or fault Presentation Function (audible alarm simultaneously), but audit memory has loaded and unloaded result's (128 print datas).More than show and be Chinese character.Main electrical equipment also has stronger editting function, can edit name driver, by the license number of entrucking or exabyte, but the general assembly (TW) of setting-up time and desire dress material.
Description of drawings:
Fig. 1: schematic block circuit diagram of the present utility model.
Fig. 2: the circuit theory diagrams of the main electrical equipment among Fig. 1.
Fig. 3: the front view of main electric appliance casing in the utility model.
Fig. 4: the A direction view among Fig. 3.
Fig. 5: the side view of main electric appliance casing in the utility model.
Embodiment:
See Fig. 2, the LCD display that can be used for watching night is extensive use of Chinese and shows, convenient greatly domestic user.Designed multiple display screen at the different users:
(1) main display of weighing of weighing operation person (being the shovel loader driver) use, zero clearing (allowancing for bark) display screen, parameter are set display screen, data are printed query display screen etc.The main display of wherein weighing can show tipping bucket number, tipping bucket and lift arm position, monobucket weight of material, the weight that adds up, the weight of successively decreasing, date and time, name, license number and zero clearing (allowancing for bark) state or relevant fault prompting etc. simultaneously.Zero clearing and allowance for bark and merge into a kind of operation is because purpose all is in order to draw the net weight of material in the tipping bucket.
(2) the inside parameter display screen that debugging, calibration or maintenance and repair personnel use, pressure-temperature calibration display screen, weight-speed calibration display screen etc.Wherein the parameter display screen can show greatly/raw data such as loculus oil pressure/oil temperature, lift arm speed, weight simultaneously, and the very convenient relevant personnel use when the adjustment of weighing, fault analysis.
The data of weighing can be stored in (100 years) for a long time and preserve among the EEPOM of data, and can conveniently inquire about or print the preservation data.Need not use battery.
Have button backlight and make things convenient for night time operation.The operation of weighing device all is to finish by button, and is convenient and swift.
This shovel loader electronic weighing device has following technical indicator:
(1) dynamic weighing precision: 0.5～1%FS (shovel loader nominal load capacity)
(2) monobucket scope: the 0～99.99t that weighs
(3) scope of weighing: the 0～327.67t that adds up
(4) general assembly (TW) scope: the 0～327.67t that successively decreases
(5) pressure transducer working pressure range 0～18MPa, extreme pressure 100MPa
(6) main frame (measurement display) operating temperature range :-20 ℃～50 ℃;
Various working sensor temperature ranges :-20 ℃～100 ℃.
(7) preserve data content: name driver, license number, bucket number, cumulative weight, date (time-division date).Can preserve data capacity: 128 groups (every group contains above data), and can expand.
(8) liquid power supply: direct current 20V～40V, and overvoltage protection is arranged.
See Fig. 3, LCDs (7) is arranged at main appliance panel top, and panel bottom keyboard has 1～9,0 numerical key and " zero clearing ", " printing ", " setting ", " carriage return ", " weighing ", " G1 ", " G2 ", " G3 " function key on the keyboard.Also has shifting bond(s).
Seeing Fig. 4, in the rearward end of main electrical equipment a plurality of interfaces (8) are arranged, is two pressure sensor interfaces, a pulling speed sensor interface, a tipping bucket bucket counter interface, a printer interface.
Claims (4)
1, shovel loader electronic weighing device is characterized in that:
Install on the pipeline in the high-low pressure chamber of any oil cylinder in two swing arm lift cylinders of shovel loader and have big cavity pressure sensor and the loculus pressure transducer of measuring temperature function; The pulling speed sensor is installed on the front frame of shovel loader; Tipping bucket bucket counter is installed on the dump ram of shovel loader; Big cavity pressure sensor, loculus pressure transducer, pulling speed sensor, tipping bucket bucket counter directly link to each other with main electrical equipment with interface by cable; Main electrical equipment is core with the singlechip CPU; The shell that main electrical equipment is installed is arranged;
Main electrical equipment comprises:
Big cavity pressure sensor interface filtering circuit (1) connects amplification and A/D change-over circuit (2), connects singlechip CPU then; Loculus pressure sensor interface filtering circuit (3) connects amplification and A/D change-over circuit (4), connects singlechip CPU then; Tipping bucket bucket counter interface connects anti-interference buffer circuit (5), connects singlechip CPU then; The pulling speed sensor interface connects anti-interference buffer circuit (6), connects singlechip CPU then; Singlechip CPU is connected with data storing circuit, clock circuit, keyboard and backlight circuit, printer circuitry, anti-overvoltage mu balanced circuit, LCD display circuit respectively; The LCD display circuit is connected with LCDs;
Main electrical equipment adopts singlechip CPU control, utilizes software to pressure signal, temperature signal, handle automatically:
Have big cavity pressure sensor and the loculus pressure transducer of measuring temperature function and record big cavity pressure temperature signal and loculus pressure and temp signal respectively, divide two-way to pass through separately 16 A/D converters of interface circuit, filtering circuit, high precision respectively, coupling by software is amplified, carry out the pressure data compensation by software, be converted to big cavity pressure temperature digital signal and loculus pressure and temp digital signal, two ways of digital signals is sent into singlechip CPU again and is carried out data processing, control weighing measurement precision.
2, shovel loader electronic weighing device according to claim 1 is characterized in that:
Singlechip CPU is selected the integrated circuit of 89C51RD2FN model for use, and amplification and A/D change-over circuit are selected the integrated circuit of AD7705 model for use, and the data storing circuit is selected the integrated circuit of X5645 model for use, and LCDs is selected 128 * 128 dot matrix for use.
3, shovel loader electronic weighing device according to claim 1 and 2, it is characterized in that: the pulling speed sensor is in the plumbous box of the die casting of a water-tight device two probes of being made by tongue tube to be installed, between two probes spacing is arranged, the pulling speed sensor maintains static by the fore-stock that support is installed in shovel loader; When the process of the permanent magnet on the swing arm that is installed in shovel loader speed pickup, two probes send switching signal respectively, by interface and anti-interference and the buffering circuit (6) enter single-chip microcomputer, single-chip microcomputer is according to the time of magnet by two probes, calculate the speed of swing arm motion, the speed parameter has been arranged, carried out velocity compensation by the heavy amount of software symmetry.
4, shovel loader electronic weighing device according to claim 3, it is characterized in that: LCDs (7) is arranged at main housing face-plate for electric appliance top, keyboard is arranged at the panel bottom, 1～9,0 numerical key and " zero clearing ", " printing ", " setting ", " carriage return ", " weighing ", " G1 ", " G2 ", " G3 " function key are arranged on the keyboard, also have shifting bond(s); Rearward end at main electrical equipment has a plurality of interfaces (8), is respectively two pressure sensor interfaces, a pulling speed sensor interface, a tipping bucket bucket counter interface, a printer interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420060143 CN2708272Y (en) | 2004-07-08 | 2004-07-08 | Loader electronic weighing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200420060143 CN2708272Y (en) | 2004-07-08 | 2004-07-08 | Loader electronic weighing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2708272Y true CN2708272Y (en) | 2005-07-06 |
Family
ID=34851986
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200420060143 Expired - Fee Related CN2708272Y (en) | 2004-07-08 | 2004-07-08 | Loader electronic weighing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2708272Y (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102735318A (en) * | 2011-04-12 | 2012-10-17 | 塔姆特豪思公司 | Measurement system for a material transfer vehicle |
| CN102735319A (en) * | 2011-04-12 | 2012-10-17 | 塔姆特豪思公司 | Monitoring system for a material transfer vehicle |
| CN101999069B (en) * | 2007-11-30 | 2013-05-01 | 卡特彼勒公司 | Payload system that compensates for rotational forces |
| CN107197807A (en) * | 2017-05-26 | 2017-09-26 | 上海海洋大学 | Automatic weigh feeding system and feeding method |
-
2004
- 2004-07-08 CN CN 200420060143 patent/CN2708272Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101999069B (en) * | 2007-11-30 | 2013-05-01 | 卡特彼勒公司 | Payload system that compensates for rotational forces |
| CN102735318A (en) * | 2011-04-12 | 2012-10-17 | 塔姆特豪思公司 | Measurement system for a material transfer vehicle |
| CN102735319A (en) * | 2011-04-12 | 2012-10-17 | 塔姆特豪思公司 | Monitoring system for a material transfer vehicle |
| CN102735319B (en) * | 2011-04-12 | 2016-09-28 | 塔姆特豪思公司 | The monitoring system of vehicle is transmitted for material |
| CN107197807A (en) * | 2017-05-26 | 2017-09-26 | 上海海洋大学 | Automatic weigh feeding system and feeding method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20050706 Termination date: 20110708 |