CN219434199U - Weighing junction box with unbalanced load correction function - Google Patents
Weighing junction box with unbalanced load correction function Download PDFInfo
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- CN219434199U CN219434199U CN202223252453.2U CN202223252453U CN219434199U CN 219434199 U CN219434199 U CN 219434199U CN 202223252453 U CN202223252453 U CN 202223252453U CN 219434199 U CN219434199 U CN 219434199U
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- unbalanced load
- junction box
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- 238000005303 weighing Methods 0.000 title claims abstract description 94
- 238000012937 correction Methods 0.000 title claims abstract description 32
- 238000007789 sealing Methods 0.000 claims abstract description 18
- 238000004891 communication Methods 0.000 claims abstract description 16
- 239000000565 sealant Substances 0.000 claims description 2
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 238000000034 method Methods 0.000 description 9
- 238000004519 manufacturing process Methods 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 8
- 238000010586 diagram Methods 0.000 description 6
- 230000005484 gravity Effects 0.000 description 2
- 238000010276 construction Methods 0.000 description 1
- 230000008602 contraction Effects 0.000 description 1
- 238000011161 development Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000002955 isolation Methods 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 230000002265 prevention Effects 0.000 description 1
- 238000012545 processing Methods 0.000 description 1
- 230000000007 visual effect Effects 0.000 description 1
- 238000003466 welding Methods 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E10/00—Energy generation through renewable energy sources
- Y02E10/50—Photovoltaic [PV] energy
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- Connection Or Junction Boxes (AREA)
Abstract
The utility model relates to the technical field of weighing, in particular to a weighing junction box with an unbalanced load correction function, which comprises a junction box body and a plurality of analog weighing sensors, wherein the junction box body comprises a shell and a plastic sealing box arranged in the shell; the plastic sealing box is internally provided with a wiring board, a singlechip, a plurality of A/D digital-to-analog converters, a temperature sensor, a power management unit and a communication unit which are electrically connected; the A/D digital-analog converter is electrically connected with the analog weighing sensor in a one-to-one correspondence manner. The utility model has the beneficial effects that: in the weighing junction box with the unbalanced load correction function, the plastic sealing box is additionally arranged in the shell of the junction box to seal the core part, namely the junction plate, the singlechip and the A/D digital-to-analog converter, which are arranged on the junction plate, so that the sealing protection and the stability of key parts are enhanced.
Description
Technical Field
The utility model relates to the technical field of weighing, in particular to a weighing junction box with an unbalanced load correction function.
Background
Along with the progress of science and technology and the development of economy, the application of the electronic scale is also becoming more and more popular, so that the electronic scale is not only very popular in commercial metering, but also is increasingly used in the production process. The electronic scale mainly comprises a weighing platform, a weighing sensor, a junction box, a shielding signal cable and a weighing display instrument. When the object to be weighed is placed on the weighing platform, under the action of gravity, the weighing platform transmits the gravity to the weighing sensor, so that the sensor elastic body is deformed, a voltage signal proportional to the quality value is output under the action of exciting voltage, the signal is amplified by the linear amplifier, then the signal is converted into a digital signal through A/D, and the quality value is directly displayed after being processed by the microprocessor.
For an electronic scale such as an electronic truck scale, an electronic ground scale, an electronic platform scale, etc. employing a plurality of sensors, unbalanced load errors are generated due to inconsistent output under the same load as the output sensitivity and output impedance of each sensor are unlikely to be consistent, as well as welding deformation of the weighing platform, deformation of the weighing platform caused by impact of a weighed object during use, horizontal errors of a foundation on which the weighing sensor is mounted, etc. There are several methods for adjusting the unbalanced load error:
1. adjustment of offset load error of analog weighing sensor
Adopt mode of adjusting output signal
Electronic scales using multiple weighing sensors basically all adopt a full parallel operation mode. In order to ensure that each sensor can work normally, the requirements on the technical parameters of the sensors are higher, and the output impedance and the output sensitivity error of each weighing sensor are required to be smaller. The offset load error is adjusted by connecting an isolation resistor in series with the output end of each sensor, and simultaneously connecting a short-circuit prevention resistor and an adjustable precision potentiometer in parallel with the two output ends. The impedance sensitivity is finely adjusted by adjusting the potentiometer, so that the output impedance and the sensitivity coefficient of each weighing sensor are consistent as much as possible to achieve unbalanced load balance;
the mode of adjusting input power supply is adopted
The input power supply adjustment mode is generally that an adjustable precision potentiometer is connected in series with the input end of the sensor, and the output of each weighing sensor is consistent as much as possible through adjusting the input voltage of the weighing sensor to achieve unbalanced load balance.
2. Adjustment of offset load error of digital weighing sensor
Automatic adjustment using an angular difference adjustment program
Provided that the offset load adjustment adopts an angular pressing mode and the address of each bearing point sensor is known. Entering parameter setting, and adjusting the pressure angle according to the constant object for instrument prompt. The meter does not display that the indication value must exit the parameter setting to determine the unbalanced load error.
Secondly, the unbalanced load error is adjusted by changing the unbalanced load coefficient of the weighing sensor
When the electronic scale is shifted, the addresses of the sensors at the bearing points are disturbed or forgotten. Then the adjustment cannot be made using method 1. Parameter settings must be entered to modify the sensor unbalance loading coefficient. And modifying the unbalanced load coefficient to be adjusted according to the indication value to achieve unbalanced load balance.
The disadvantage of the above-mentioned adjustment of the offset error is:
1. offset load error adjustment of analog weighing sensor
The method has the advantages that the requirement on consistency of the output sensitivity and the output impedance of each weighing sensor is very high, the production difficulty of the weighing sensors is increased, the production efficiency is low, and the labor intensity of workers is high;
the method has high levelness requirements on the bearing foundation of the electronic scale, and the foundation construction cost is increased;
the method has the advantages of high labor intensity, low efficiency and low accuracy in unbalanced load adjustment;
in the method, when the unbalanced load error is adjusted, adjacent bearing points can influence each other, the adjustment is considered left and right, and the requirements on experience and technical level of operators are high;
in the use process, unbalanced load errors caused by foundation change, thermal expansion and contraction influence, weighing table deformation caused by the impact of a weighed object and the like are increased, and subsequent adjustment cost and working strength are high;
the seal protection level is lower.
2. Offset load error adjustment of digital weighing sensor
The method has the advantages of complex operation, high requirement on operators and non-visual error display;
secondly, when the addresses of the weighing sensors at the bearing points are disturbed or the addresses of the bearing points of the weighing sensors are forgotten, great inconvenience is brought to subsequent unbalanced load error adjustment;
and thirdly, unbalanced load adjustment and range calibration cannot be completed at the same time, so that the workload and labor intensity are increased, and the working efficiency is low.
The sealing protection level is lower.
Disclosure of Invention
The technical problems to be solved by the utility model are as follows: the weighing junction box with the unbalanced load correction function is high in protection level.
In order to solve the technical problems, the utility model adopts the following technical scheme: the junction box comprises a junction box body and a plurality of analog weighing sensors, wherein the junction box body comprises a shell and a plastic sealing box arranged in the shell;
the plastic sealing box is internally provided with a wiring board, a singlechip, a plurality of A/D digital-to-analog converters, a temperature sensor, a power management unit and a communication unit which are electrically connected;
the singlechip, the plurality of A/D digital-to-analog converters, the temperature sensor, the power management unit and the communication unit are arranged on the wiring board;
the A/D digital-to-analog converter is electrically connected with the analog weighing sensor in a one-to-one correspondence manner;
the singlechip is used for acquiring temperature data and weight data of the temperature sensor and the weighing sensor and sending the temperature data and the weight data to a computer or a weighing instrument outside the junction box body.
Furthermore, in the weighing terminal box with the unbalanced load correction function, the communication unit comprises a TTL serial port, an RS232 interface or an RS485 interface.
Furthermore, in the weighing junction box with the unbalanced load correction function, the A/D converter is a 24-bit high-precision A/D converter, the temperature sensor is an NTC thermistor, and the singlechip is a 32-bit flash singlechip.
Furthermore, in the weighing junction box with the unbalanced load correction function, the plastic sealing box is filled with sealant.
Furthermore, in the weighing junction box with the unbalanced load correction function, the analog weighing sensors are analog weighing sensors with any specification, and can be selected as KA 13031H-type weighing sensors, and the number of the analog weighing sensors is 4.
The utility model has the beneficial effects that: in the weighing junction box with the unbalanced load correction function, the plastic sealing box is additionally arranged in the shell of the junction box to seal the core part, namely the junction plate, the singlechip and the A/D digital-to-analog converter, which are arranged on the junction plate, so that the sealing protection and the stability of key parts are enhanced.
The utility model collects the weight data of the analog weighing sensors one by one through the A/D converter, measures the output value of each analog weighing sensor, and converts the output value into a digital signal through the A/D converter for processing by the singlechip.
When the unbalanced load is calibrated, the single chip microcomputer simultaneously collects the data output by each A/D (analog to digital) converter by loading weights with the same weight on each sensor, and the sensitivity difference of each sensor is calculated, so that the unbalanced load correction coefficient is obtained.
When the junction box is assembled into the balance body for use, the weight is additionally arranged at any position of the balance body, and the singlechip simultaneously collects the data output by each A/D (analog to digital) converter and multiplies the data by the unbalanced load correction coefficient respectively to obtain the actual weight value. The actual weight value is transmitted to a computer or a weighing display instrument through a communication unit for display.
Drawings
FIG. 1 is a schematic connection diagram of a weighing terminal box with unbalanced load correction function according to an embodiment of the present utility model;
FIG. 2 is a schematic circuit diagram of a singlechip of a weighing junction box with unbalanced load correction function according to an embodiment of the utility model;
FIG. 3 is a schematic circuit diagram of 4A/D digital-to-analog converters of a weighing terminal box with offset load correction according to an embodiment of the present utility model;
FIG. 4 is a schematic circuit diagram of a temperature sensor of a weighing terminal box with offset load correction according to an embodiment of the present utility model;
FIG. 5 is a schematic circuit diagram of a power management unit of a weighing terminal box with unbalanced load correction function according to an embodiment of the present utility model;
FIG. 6 is a schematic circuit diagram of a communication unit of a weighing terminal box with unbalanced load correction function according to an embodiment of the present utility model;
description of the reference numerals:
1. simulating a weighing sensor; 2. a housing; 3. a plastic seal box; 4. a wiring board; 41. a single chip microcomputer; 42. an A/D digital-to-analog converter; 43. a temperature sensor; 44. a power management unit; 45. a communication unit; 5. a computer or a weighing scale.
Detailed Description
In order to describe the technical contents, the achieved objects and effects of the present utility model in detail, the following description will be made with reference to the embodiments in conjunction with the accompanying drawings.
Example 1
Referring to fig. 1-6, a weighing junction box with unbalanced load correction function comprises a junction box body and 4 analog weighing sensors, wherein the junction box body comprises a shell and a plastic sealing box arranged in the shell;
the plastic sealing box is internally provided with a wiring board, a singlechip, 4A/D digital-to-analog converters, a temperature sensor, a power management unit and a communication unit which are electrically connected;
the singlechip, the plurality of A/D digital-to-analog converters, the temperature sensor, the power management unit and the communication unit are arranged on the wiring board;
the A/D digital-to-analog converter is electrically connected with the analog weighing sensor in a one-to-one correspondence manner;
the singlechip is used for acquiring temperature data and weight data of the temperature sensor and the weighing sensor and sending the temperature data and the weight data to a computer or a weighing instrument outside the junction box body.
The communication unit comprises a TTL serial port, an RS232 interface or an RS485 interface. The analog weighing sensor is of any specification, and can be selected as a KA13031H type weighing sensor, the A/D analog-to-digital converter is a 24-bit high-precision A/D analog-to-digital converter, the temperature sensor is an NTC thermistor, and the singlechip is a 32-bit flash singlechip.
The weighing junction box with the unbalanced load correction function is used: in the weighing junction box, 4 analog weighing sensors are connected to a junction plate in a shell of the junction box and are connected with an A/D (analog to digital) converter arranged on the junction plate through the junction plate. The computer or the external weighing instrument is connected to a wiring board in the shell of the wiring box, and is connected with a communication unit arranged on the wiring board through the wiring board. The singlechip is connected with the A/D digital-to-analog converter and can acquire an analog signal of weight data of the analog weighing sensor, and the singlechip transmits the weight data subjected to unbalanced load correction to a computer or an external weighing instrument through the communication unit.
In summary, the weighing junction box with the unbalanced load correction function provided by the utility model has the following advantages:
1. the weighing junction box is internally provided with a plastic sealing box for sealing the core part, so that the sealing protection of key parts (the junction plate and parts on the junction plate) is enhanced, a double waterproof structure is used, and the reliability is greatly improved.
2. The weighing junction box can be directly connected into the analog weighing sensor and outputs a digital signal, the potentiometer is not required to adjust unbalanced load, the single weighing sensor is not required to be digitalized, the production cost is reduced, meanwhile, the requirements on the output sensitivity and the output impedance of the weighing sensor are quite low, the standardized correction on the output sensitivity and the output impedance is not required, the production difficulty and the labor intensity of the weighing sensor are reduced, the production cost of the weighing sensor is reduced, and the production efficiency of the weighing sensor is greatly improved.
3. The automatic calibration method is adopted, the position of the weighing sensor is not required to be recorded, the loading sequence is not required, and the requirement on operators is low; according to a special weighing instrument or a computer, parameter setting of a weighing sensor is completed, unbalanced load correction and linearization correction are carried out; the weighing sensor can be suitable for weighing sensors with different sizes and different measuring ranges, the data updating frequency is adjustable, the communication rate is adjustable, the full-digital unbalanced load correction is realized, and the multi-section weight linearization correction is realized. The offset load adjustment and the measuring range calibration can be completed at the same time, so that the production efficiency is improved, and the labor intensity is reduced.
The foregoing description is only illustrative of the present utility model and is not intended to limit the scope of the utility model, and all equivalent changes made by the specification and drawings of the present utility model, or direct or indirect application in the relevant art, are included in the scope of the present utility model.
Claims (5)
1. The weighing junction box with the unbalanced load correcting function is characterized by comprising a junction box body and a plurality of analog weighing sensors, wherein the junction box body comprises a shell and a plastic sealing box arranged in the shell;
the plastic sealing box is internally provided with a wiring board, a singlechip, a plurality of A/D digital-to-analog converters, a temperature sensor, a power management unit and a communication unit which are electrically connected;
the singlechip, the plurality of A/D digital-to-analog converters, the temperature sensor, the power management unit and the communication unit are arranged on the wiring board;
the A/D digital-to-analog converter is electrically connected with the analog weighing sensor in a one-to-one correspondence manner;
the singlechip is used for acquiring temperature data and weight data of the temperature sensor and the weighing sensor and sending the temperature data and the weight data to a computer or a weighing instrument outside the junction box body.
2. The weighing terminal box with unbalanced load correction function according to claim 1, wherein the communication unit comprises a TTL serial port, an RS232 interface or an RS485 interface.
3. The weighing terminal box with unbalanced load correction function according to claim 1, wherein the A/D analog-to-digital converter is a 24-bit high-precision A/D analog-to-digital converter, the temperature sensor is an NTC thermistor, and the singlechip is a 32-bit flash singlechip.
4. The weighing terminal box with unbalanced load correction function according to claim 1, wherein the inside of the plastic sealing box is filled with sealant.
5. The weighing terminal box with unbalanced load correction function of claim 1, wherein the number of analog load cells is 4.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223252453.2U CN219434199U (en) | 2022-12-05 | 2022-12-05 | Weighing junction box with unbalanced load correction function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202223252453.2U CN219434199U (en) | 2022-12-05 | 2022-12-05 | Weighing junction box with unbalanced load correction function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN219434199U true CN219434199U (en) | 2023-07-28 |
Family
ID=87335695
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202223252453.2U Active CN219434199U (en) | 2022-12-05 | 2022-12-05 | Weighing junction box with unbalanced load correction function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN219434199U (en) |
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2022
- 2022-12-05 CN CN202223252453.2U patent/CN219434199U/en active Active
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