A high-precision bar scale body

Abstract

This utility model relates to the field of electronic scale technology, and in particular to a high-precision bar scale body. The main supporting beam has a hollow structure, with load cells installed at both ends of the inner cavity of the main supporting beam. A wiring module is installed in the middle of the main supporting beam, and the signal lines of both load cells are connected to the wiring module. A potentiometer is installed on the wiring module to adjust the resistance. Adjusting the potentiometer eliminates the error between the sensors and improves the weighing accuracy. The main supporting body has mounting ears for installing the supporting platform, making installation and use convenient. The load cell lines are centrally connected to the built-in wiring module in the middle, and each bar scale has only one output line, making the structure simpler. In wireless connection applications, a wiring module integrating a microprocessor for digital-to-analog conversion and a wireless transmitter is selected. The signals from the load cells are processed on the wiring module and then directly transmitted to the instrument or other devices that require the weight data through the wireless transmitter, simplifying the structure.

Description

Technical Field

[0001] This utility model relates to the field of electronic scale technology, and in particular to a high-precision bar scale body. Background Technology

[0002] An electronic scale is a device that uses electronic technology to measure the mass of objects and is widely used in households, businesses, and industries.

[0003] A Chinese patent (CN206192478U) discloses a bar scale, which includes a main beam weighing platform, a signal module installed inside the main beam weighing platform, a weighing sensor disposed on the main beam weighing platform, and an instrument display module disposed on one side of the main beam weighing platform. It also includes a shielded wire connecting the weighing sensor and the instrument display module, and the main beam weighing platform is a strip-shaped tube. However, it has the following drawbacks:

[0004] 1. Connecting the scale body to other platforms requires a separate angle iron connecting bracket, which is very inconvenient;

[0005] 2. The existing main beam weighing platform has signal modules installed at both ends to transmit signals. The weighing sensor is installed inside the main beam weighing platform. The weighing sensor is connected to the corresponding signal module, which facilitates the weighing sensor to convert the weight signal into an electrical signal and then quickly transmit it to the signal sensor through the terminal block. The above structure is complicated, and in the actual production process, the output signal of the sensor often has a small error. This technical solution cannot eliminate this error, resulting in low weighing accuracy.

[0006] 3. Existing weighing sensors convert weight signals into electrical signals and transmit them to the instrument through a connecting plate and anti-interference shielded wires. After processing by the instrument's microprocessor, the weight is displayed, or transmitted to other devices via wired or wireless means. However, in situations where wireless use is required, the bar scale still needs to be connected to the instrument via a wired connection, which is quite complicated. Some usage scenarios do not even have the conditions for wired connection, such as when the load-bearing platform is too large and hands cannot be inserted to perform wiring operations. Utility Model Content

[0007] The technical problem to be solved by this utility model is: in order to solve the problems existing in the prior art in the background art, to provide a high-precision bar scale body that eliminates the error between weighing sensors and improves the weighing accuracy.

[0008] The technical solution adopted by this utility model to solve its technical problem is: a high-precision bar scale body, including a main supporting beam, the main supporting beam being a hollow structure, with load cells installed at both ends of the inner cavity of the main supporting beam, and a wiring module installed in the middle of the main supporting beam, the signal lines of the two load cells being connected to the wiring module, and a potentiometer for adjusting the resistance being installed on the wiring module.

[0009] Furthermore, the wiring module integrates a microprocessor for analog-to-digital conversion and a wireless transmitter. The load cell is connected to the microprocessor to convert the analog signal received from the load cell into a digital signal to form weight data. The microprocessor is connected to the wireless transmitter to wirelessly transmit the weight data to the instrument or other devices that require the weight data.

[0010] Furthermore, mounting ears are installed on both sides of the main beam.

[0011] Furthermore, one end of the load cell is equipped with a support leg that extends out of the main beam, and the other end of the load cell is bolted into the main beam.

[0012] Furthermore, the support leg is a fixed leg with a large disc and a screw. The diameter of the large disc in the support leg is greater than or equal to the width of the main beam, and the screw is connected to the load cell.

[0013] Furthermore, an output signal line is connected to the wiring module, and the output signal line is led out from one end of the main beam; both ends of the main beam are equipped with side cover plates, and cable fixing connectors for protecting the output signal line are installed on the surface of the side cover plates.

[0014] Furthermore, an output signal line connector is installed at the output end of the output signal line.

[0015] Furthermore, mounting lugs are provided on the inner walls at both ends of the main beam, and the side cover plates are installed with the mounting lugs by bolts.

[0016] Furthermore, a fixing plate is installed between the lower end of the load cell and the inner wall of the main beam, and a gasket is installed between the upper end of the load cell and the inner wall of the main beam.

[0017] Furthermore, an opening is provided on the main beam, through which the wiring module is placed and covered by a wiring module cover plate. A handle is also installed on one side of the main beam.

[0018] The beneficial effects of this utility model are:

[0019] 1. The main body of the load-bearing unit comes with mounting ears for installing the load-bearing platform, making installation and use convenient;

[0020] 2. The load cell lines are centrally connected to the built-in wiring module in the middle. Each bar scale has only one output line, which makes the structure simpler. The wiring module has a potentiometer that can adjust the signal. Adjusting the potentiometer can eliminate errors between sensors and improve weighing accuracy.

[0021] 3. In applications requiring wireless connectivity, a wiring module integrating a microprocessor for digital-to-analog conversion and a wireless transmitter should be selected. The signal from the load cell is processed on the wiring module and then transmitted directly to the instrument or other equipment that requires the weight data via the wireless transmitter, simplifying the structure. Attached Figure Description

[0022] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0023] Figure 1 This is a schematic diagram of the structure of this utility model;

[0024] Figure 2 This is the front view of this utility model;

[0025] Figure 3 This is an exploded view of this utility model;

[0026] In the diagram: 1. Output signal line connector, 2. Cable fixing connector, 3. Side cover plate, 4. Weighing sensor, 5. Support leg, 6. Wiring module cover plate, 7. Load-bearing main beam, 8. Handle, 9. Wiring module, 10. Output signal line, 11. Mounting ear, 12. Mounting lug, 13. Opening, 14. Fixing plate, 15. Gasket. Detailed Implementation

[0027] The present invention will now be described in further detail with reference to the accompanying drawings. These drawings are simplified schematic diagrams, illustrating only the basic structure of the present invention, and therefore only show the components relevant to the present invention.

[0028] In this utility model Figure 1 This is the front of the product, in its normal use state. Figure 2 and Figure 3 This is the state of the product after it has been flipped over.

[0029] like Figures 1-3 The high-precision bar scale body shown includes a main support beam 7. Both ends of the main support beam 7 are equipped with mounting ears 11. The mounting ears 11 can be easily connected to a larger platform for weighing large items, making it convenient to use.

[0030] The main beam 7 is a hollow structure, serving as the main frame of the entire weighing structure. It bears the external load and transmits it to the load cells 4. Load cells 4 are installed at both ends of the inner cavity of the main beam 7 to detect the pressure on the main beam 7 in real time and output analog signals. A wiring module 9 is installed in the middle of the main beam 7. Each load cell 4 has a signal line at its tail. The signal lines of both load cells 4 are connected to the wiring module 9. A potentiometer is installed on the wiring module 9 to adjust the resistance. By adjusting the potentiometer, the signal inconsistency caused by sensor manufacturing errors can be eliminated, improving the weighing accuracy. The potentiometer can be adjusted during the production calibration stage, the positioning maintenance stage, and after component replacement to ensure the measurement accuracy and reliability of the electronic scale.

[0031] The wiring module 9 integrates a microprocessor for digital-to-analog conversion and a wireless transmitter. The load cell is connected to the microprocessor to convert the analog signal received from the load cell into a digital signal to form weight data. The microprocessor is connected to the wireless transmitter to wirelessly transmit the weight data to the instrument or other devices that need the weight data, thus simplifying the structure.

[0032] like Figures 1-3 As shown, an output signal line 10 is connected to the wiring module 9. The output end of the output signal line 10 is equipped with an output signal line connector 1. The output signal line 10 is led out from one end of the main beam 7, simplifying the external connection.

[0033] Both ends of the main beam 7 are equipped with side cover plates 3. Cable fixing connectors 2 for protecting the output signal line 10 are installed on the surface of the side cover plates 3. In harsh outdoor environments, the fixing connectors can be selected to have waterproof functions to meet the waterproof requirements of rain and daily washing.

[0034] like Figures 1-3 As shown, mounting lugs 12 are provided on the inner walls of both ends of the main beam 7, and the side cover plate 3 is installed with the mounting lugs 12 by bolts.

[0035] One end of the load cell 4 is equipped with a support leg 5, which extends out of the main beam 7. The other end of the load cell 4 is installed inside the main beam 7 by bolts.

[0036] like Figure 3As shown, support leg 5 is a fixed foot with a large disc and a screw. The diameter of the large disc in support leg 5 is greater than or equal to the width of the main beam 7, which disperses the pressure and prevents local deformation of the main beam 7. In this way, even if the connection between the platform and the bar scale body used by the user on site is not level, the load force point transmitted by the platform to the bar scale is still within the range of the support leg in the vertical direction, ensuring that the scale body is level when weighing. The screw is connected to the load cell 4 and its height can be adjusted. In the case of uneven ground, the level of the load beam can be ensured by adjusting the length of the screw, thereby improving the weighing accuracy.

[0037] A fixing plate 14 is installed between the lower end of the load cell 4 and the inner wall of the main beam 7. The fixing plate 14 acts like a nut to fix the load cell 4 to the main beam 7. A gasket 15 is installed between the upper end of the load cell 4 and the inner wall of the main beam 7 to ensure that there is a gap between the load cell 4 and the main beam 7 so that weighing can be performed.

[0038] like Figure 3 As shown, an opening 13 is provided on the beam body of the main beam 7. The wiring module 9 is placed in the main beam 7 through the opening 13 and is covered by the wiring module cover plate 6 to form a sealed protection. A handle 8 is also installed on one side of the main beam 7.

[0039] Weighing process:

[0040] Bar scales are generally used in pairs. When using them, first place the two bar scales on a flat, hard surface, with the two bar scales parallel to each other. Adjust the height of the support feet 5 so that the scale body supports the main beam 7 horizontally. Connect the output signal line of the bar scale to the instrument, or connect it to the instrument wirelessly.

[0041] During weighing, the goods are placed on two bar scales simultaneously. The external force of the goods acts on the supporting main beam 7 and is transmitted to the weighing sensors 4 at both ends. The weighing sensors 4 output analog signals, which are transmitted to the wiring module 9 via signal lines. The microprocessor completes the analog-to-digital conversion, and the wireless transmitter sends the weight data to the terminal. The instrument displays the weight in real time, and the weight data displayed on the instrument can be read. When the size of the goods is different, or the rigidity of the goods is insufficient to place them on two bar scales, an additional supporting platform is required. First, the supporting platform is placed on the two bar scales. A better solution is to use the mounting ears 11 on both sides of the supporting main beam 7 of the bar scales to reliably connect the bar scales to the supporting platform with bolts, and then place the goods on the supporting platform for weighing.

[0042] Based on the above-described preferred embodiments of this utility model, and through the foregoing description, those skilled in the art can make various changes and modifications without departing from the technical concept of this utility model. The technical scope of this utility model is not limited to the contents of the specification, but must be determined according to the scope of the claims.

Claims

1. A high-precision bar scale body, characterized in that: Includes a main beam (7), which is a hollow structure. Weighing sensors (4) are installed at both ends of the inner cavity of the main beam (7). A wiring module (9) is installed in the middle of the main beam (7). The signal lines of the two weighing sensors (4) are connected to the wiring module (9). A potentiometer for adjusting the resistance is installed on the wiring module (9).

2. The high-precision bar scale body according to claim 1, characterized in that: The wiring module (9) integrates a microprocessor for digital-to-analog conversion and a wireless transmitter. The load cell is connected to the microprocessor to convert the analog signal received from the load cell into a digital signal to form weight data. The microprocessor is connected to the wireless transmitter and sends the weight data wirelessly to the instrument or the device that needs the weight data.

3. The high-precision bar scale body according to claim 1, characterized in that: Mounting ears (11) are installed on both sides of the main beam (7).

4. The high-precision bar scale body according to claim 1, characterized in that: One end of the weighing sensor (4) is equipped with a support leg (5), which extends out of the main beam (7) and the other end of the weighing sensor (4) is installed inside the main beam (7) by bolts.

5. The high-precision bar scale body according to claim 4, characterized in that: The support leg (5) is a fixed leg with a large disc and a screw. The diameter of the large disc in the support leg (5) is greater than or equal to the width of the main beam (7) and the screw is connected to the weighing sensor (4).

6. The high-precision bar scale body according to claim 1, characterized in that: An output signal line (10) is connected to the wiring module (9), and the output signal line (10) is led out from one end of the main beam (7); Both ends of the main beam (7) are equipped with side cover plates (3), and cable fixing connectors (2) for protecting the output signal line (10) are installed on the surface of the side cover plates (3).

7. The high-precision bar scale body according to claim 6, characterized in that: The output signal line (10) is equipped with an output signal line connector (1) at its output end.

8. The high-precision bar scale body according to claim 1, characterized in that: The inner walls at both ends of the main beam (7) are provided with mounting lugs (12), and the side cover plate (3) is installed with the mounting lugs (12) by bolts.

9. The high-precision bar scale body according to claim 1, characterized in that: A fixing plate (14) is installed between the lower end of the weighing sensor (4) and the inner wall of the main beam (7), and a gasket (15) is installed between the upper end of the weighing sensor (4) and the inner wall of the main beam (7).

10. The high-precision bar scale body according to claim 1, characterized in that: An opening (13) is provided on the beam body of the main beam (7). The wiring module (9) is placed in the main beam (7) through the opening (13) and covered by the wiring module cover plate (6). A handle (8) is also installed on one side of the main beam (7).

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