CN219977542U

CN219977542U - Intelligent weighing system

Info

Publication number: CN219977542U
Application number: CN202320840332.5U
Authority: CN
Inventors: 王峰; 覃彦龙
Original assignee: Siemens Ltd China
Current assignee: Siemens Ltd China
Priority date: 2023-04-14
Filing date: 2023-04-14
Publication date: 2023-11-07
Anticipated expiration: 2033-04-14

Abstract

The utility model provides an intelligent weighing system, which comprises: a plurality of analog weighing sensors; a digital junction box connected with each of the plurality of analog weighing sensors; the weighing module is connected with the digital junction box to convert voltage signals from the plurality of analog weighing sensors into weight signals; and the programmable logic controller is connected with the digital junction box and the weighing module to read and evaluate various states and diagnostic information of the intelligent weighing system, and the 5G router, and is connected with the 5G router. The intelligent weighing system can finish intelligent transformation of the weighing system using the analog weighing sensor with lower cost, and can improve the stability and reliability of external data communication.

Description

Intelligent weighing system

Technical Field

The utility model relates to the field of weighing, in particular to an intelligent weighing system.

Background

Most conventional weighing systems are made up of analog weighing components, such as analog sensors and analog terminal blocks. Such weighing systems are ubiquitous: the problems of poor anti-interference capability, short transmission distance, incapability of displaying the address and working state of each sensor in real time by a weighing controller and the like are solved, and the weighing controller is inconvenient for field installation and debugging and maintenance in the future.

In particular, for application occasions with complex working conditions, poor field environment and unsuitable for service personnel to carry out equipment maintenance and debugging on site, the influence caused by the problems is more remarkable.

In addition, the communication mode between the weighing controller and the upper computer in the traditional weighing system is mainly wired communication. It is also not suitable for applications where wired deployment is difficult or costly.

For conventional weighing systems that are using analog sensors, if an intelligent solution is desired, it is common practice to replace the analog sensors with digital sensors, thus necessitating replacement of all sensors and installation kits, requiring rewiring. This intelligent solution is relatively costly and difficult to deploy.

Disclosure of Invention

Aiming at the problems in the prior art, the utility model provides an intelligent weighing system.

In one aspect, the intelligent weighing system replaces the analog terminal block with a digital terminal block, rather than replacing the analog sensor with a digital sensor. The intelligent weighing system can well solve the defects that the sensor is difficult to install and debug, the daily maintenance is complex, the address and the working state of each sensor cannot be monitored in real time, and the anti-interference capability of the intelligent weighing system can be enhanced. And the weighing data and the working state of each sensor are monitored remotely in real time, once a certain sensor has a problem, service personnel can find out in time, and after the connection of the certain sensor is disconnected, the equipment can still work continuously, so that the equipment downtime is reduced.

On the other hand, the intelligent weighing system adopts an industrial 5G mode to transmit data from the controller to the upper computer, and is not limited by wiring. Industrial 5G is wide in coverage, strong in anti-interference capability and high in safety and reliability of data transmission, and can help service personnel to perform remote data acquisition, monitoring, control, debugging and maintenance of the weighing system. The industrial 5G router connects the field device to the enterprise-specific 5G network, which then establishes communication with the 5G server. The external upper computer can be connected with the 5G server only by installing client software, so that the connection can be realized with the field device in an instant messaging mode. Communication between field devices such as PN controllers and PN I/O may be accomplished through servers and industrial 5G routers.

Specifically, the utility model provides an intelligent weighing system, which comprises:

a plurality of analog weighing sensors;

a digital junction box connected to each of the plurality of analog load cells;

a weighing module connected to the digital junction box to convert voltage signals from the plurality of analog weighing sensors into weight signals;

a programmable logic controller connected to the digital junction box and the weighing module for reading and evaluating various status and diagnostic information of the intelligent weighing system, and

and the 5G router is connected with the programmable logic controller.

According to an embodiment of the present utility model, in the above intelligent weighing system, the digital junction box further includes:

the number of the load unit terminals is consistent with that of the analog weighing sensors, so that a one-to-one connection relationship is formed;

the control chip is connected with the load unit terminal, analyzes and judges the running state of the analog weighing sensor, and generates a corresponding digital signal;

the DIP dial switch is arranged between the control chip and the output terminal, so that digital signals from the control chip are converted into a specific communication mode and are output from the output terminal.

According to an embodiment of the present utility model, in the above intelligent weighing system, a shielding terminal is provided on a cable between the load cell terminal and the analog load cell.

According to one embodiment of the present utility model, in the above intelligent weighing system, one shielding terminal is disposed on a cable between each two load cell terminals and each two analog weighing sensors, and a one-to-one connection relationship is formed between each two load cell terminals and each two analog weighing sensors.

According to an embodiment of the utility model, in the intelligent weighing system, the output terminal is an RS-485 terminal, and the DIP dial switch can select an RS-485 communication mode for digital signals from the control chip through switches with different fluctuation.

According to one embodiment of the present utility model, in the above intelligent weighing system, the digital junction box further includes a fault light, and the fault light is connected to the control chip.

According to an embodiment of the present utility model, in the above intelligent weighing system, the programmable logic controller forms a communication link with an external upper computer and/or a 5G server via the 5G router.

It is to be understood that both the foregoing general description and the following detailed description of the present utility model are exemplary and explanatory and are intended to provide further explanation of the utility model as claimed.

Drawings

The accompanying drawings, which are included to provide a further understanding of the utility model and are incorporated in and constitute a part of this specification, illustrate embodiments of the utility model and together with the description serve to explain the principles of the utility model. In the accompanying drawings:

FIG. 1 is a schematic diagram of one embodiment of an intelligent weighing system in accordance with the present utility model.

Fig. 2 shows a schematic diagram of the internal structure of one embodiment of a digital junction box.

Reference numerals illustrate:

10. analog weighing sensor

20. Digital junction box

21. Load cell terminal

22. Shielding terminal

23. Control chip

24 DIP dial switch

25. Output terminal

26. Fault lamp

30. Weighing module

40. Programmable logic controller

50 5G router

60. Upper computer

70 5G server

Detailed Description

Embodiments of the present utility model will now be described in detail with reference to the accompanying drawings. Reference will now be made in detail to the preferred embodiments of the present utility model, examples of which are illustrated in the accompanying drawings. Wherever possible, the same reference numbers will be used throughout the drawings to refer to the same or like parts. Furthermore, although terms used in the present utility model are selected from publicly known and commonly used terms, some terms mentioned in the present specification may be selected by the applicant at his or her discretion, the detailed meanings of which are described in relevant parts of the description herein. Furthermore, it is required that the present utility model is understood, not simply by the actual terms used but by the meaning of each term lying within.

The basic principle and preferred embodiments of the present utility model will be discussed in more detail with reference to the accompanying drawings. Referring first to fig. 1, the intelligent weighing system of the present utility model mainly comprises: a plurality of analog load cells 10, a digital junction box 20, a weighing module 30, a programmable logic controller 40, and a 5G router 50.

A digital junction box 20 is connected to each of the plurality of analog load cells 10. In a general embodiment, there are four analog load cells 10 symmetrically disposed at the bottom of the object to be weighed, respectively. The utility model adopts the analog weighing sensor 10, so that the cost and the workload of intelligent transformation can be reduced.

The weighing module 30 is connected to the digital junction box 20 to convert the voltage signals from the plurality of analog load cells 10 into weight signals.

A programmable logic controller 40 is connected to the digital junction box 20 and the weighing module 30 to read and evaluate various status and diagnostic information of the intelligent weighing system.

The 5G router 50 is connected to the programmable logic controller 40 such that the programmable logic controller 40 forms a communication link with external host computers and/or 5G servers, such as the host computer 60 and 5G server 70 of fig. 1, via the 5G router 50.

Turning to fig. 2, the internal architecture of a digital junction box 20 according to the present utility model is shown. The digital junction box 20 further includes: load unit terminal 21, shield terminal 22, control chip 23, DIP dial switch 24, output terminal 25, and fault light 26.

The number of load cell terminals 21 corresponds to the number of analog load cells 10 to form a one-to-one connection. That is, in the example discussed above, the number of load cell terminals 21 is four as well as the number of analog load cells 10, with each load cell terminal 21 being connected to one analog load cell 10, respectively.

A shield terminal 22 for shielding external interference signals may be provided on the cable between the load cell terminal 21 and the analog load cell 10. In a preferred embodiment, a shielding terminal 22 is provided on the cable between each two load cell terminals 21 and the two analog load cells 10, and a one-to-one connection is formed between the two load cell terminals 21 and the two analog load cells 10. For example, reference may be made to the connection relationship of each shield terminal 22 to two analog load cells 10 shown in fig. 2.

The control chip 23 is connected to the load cell terminal 21. The control chip 23 performs enhanced diagnostics and monitoring of each of the analog load cells 10 accessed, and may include targeted analysis and determination of the operational status of the analog load cells 10, such as wire breaks, overloads, and underruns. And the control chip 23 generates digital signals.

DIP (dual in-line package) dial switch 24 is provided between control chip 23 and output terminal 25 to convert digital signals from control chip 23 into a specific communication scheme and output from output terminal 25. In one example, the output terminal 25 is an RS-485 terminal, and the DIP dial switch 24 is able to select the RS-485 communication scheme for the digital signal from the control chip 23 by fluctuating different switches. For example, in the embodiment shown in FIG. 2, a pair of DIP dial switches 24 are included. One DIP dial switch 24 has 4 sets of switches, and the address of RS-485 is set by toggling different switches. The digital signal processed by the control chip 23 is transmitted through the output terminal 25 by means of RS-485 communication. And, another DIP dial switch 24 has 2 sets of switches, and whether the communication mode is RS-485 communication is set by toggling different switches.

Furthermore, the digital junction box 20 may further include a fault light 26 connected to the control chip 23. The fault light 26 is signaled by the control chip 23 and may also be connected to the output terminal 25. In one example, there are 6 total fault lights 26, with 4 indicator lights each showing the connection status of 4 analog load cells 10. When the analog load cell 10 is not accessed, the corresponding fault light 26 will not illuminate; when the analog load cell 10 is connected incorrectly, the corresponding fault light 26 will be lit red; when the analog load cell 10 is properly connected, the corresponding fault light 26 will illuminate green. The remaining 2 fault lamps 26 correspond to PWR (power supply) and ERR (fault), respectively, and when the junction box is connected to the 24V power supply, the PWR lamps will be turned on green; when the junction box fails, the ERR lamp is lighted red, and the specific failure cause needs to be further determined.

To sum up, if a digital sensor is selected to replace an analog sensor in order to upgrade a general weighing system into an intelligent weighing system, all sensors and installation kits need to be replaced, rewiring is needed, the engineering amount is large, and the cost is high. For the same purpose, the utility model uses a digital junction box to connect an analog weighing sensor, and the weighing module and a Programmable Logic Controller (PLC) are connected through the digital junction box. Therefore, the address, the weighing data and the voltage value of each weighing sensor can be monitored in real time, and the adjustment of the angle difference value of each weighing sensor is very convenient. If a weighing sensor fails in the future, maintenance personnel can quickly find out and timely disconnect the sensor, so that the equipment downtime is reduced. In addition, the utility model also selects industrial 5G communication, such as Siemens industrial 5G, instead of ordinary Bluetooth and Wi-Fi communication, and establishes communication connection between the weighing controller and the upper computer. The method is characterized by wide coverage of industrial 5G, strong anti-interference capability, high bandwidth, low time delay, private network of enterprises, high security, reliable data and the like. And a large amount of weighing data is transmitted to an upper computer provided with a 5G RC client through a Siemens industry 5G network (an industry 5G router and a 5G RC server), so that the client can perform remote data acquisition, monitoring, control, debugging and maintenance on a weighing system more safely, accurately and rapidly.

It will be apparent to those skilled in the art that various modifications and variations can be made to the above-described exemplary embodiments of the present utility model without departing from the spirit and scope of the utility model. Therefore, it is intended that the present utility model cover the modifications and variations of this utility model provided they come within the scope of the appended claims and their equivalents.

Claims

1. An intelligent weighing system, comprising:

a plurality of analog load cells (10);

a digital junction box (20) connected to each of the plurality of analog load cells (10);

a weighing module (30) connected to the digital junction box (20) to convert voltage signals from the plurality of analog load cells (10) into weight signals;

a programmable logic controller (40) coupled to the digital junction box (20) and the weighing module (30) for reading and evaluating various status and diagnostic information of the intelligent weighing system, and

and the 5G router (50), and the programmable logic controller (40) is connected with the 5G router (50).

2. The intelligent weighing system of claim 1, wherein said digital junction box (20) further comprises:

load cell terminals (21), the number of the load cell terminals (21) being identical to the number of the analog load cells (10) to form a one-to-one connection relationship;

the control chip (23) is connected with the load unit terminal (21), analyzes and judges the running state of the analog weighing sensor (10) and generates a corresponding digital signal;

and a DIP dial switch (24) provided between the control chip (23) and the output terminal (25) to convert the digital signal from the control chip (23) into a specific communication scheme and output the digital signal from the output terminal (25).

3. Intelligent weighing system according to claim 2, characterized in that a shielding terminal (22) is provided on the cable between the load cell terminal (21) and the analog load cell (10).

4. A smart weighing system according to claim 3, characterized in that one shielding terminal (22) is provided on the cable between each two load cell terminals (21) and two analog weighing sensors (10), and that a one-to-one connection is made between the two load cell terminals (21) and the two analog weighing sensors (10).

5. Intelligent weighing system according to claim 2, characterized in that the output terminal (25) is an RS-485 terminal and the DIP dial switch (24) is able to select the RS-485 communication scheme for the digital signals coming from the control chip (23) by means of a fluctuating different switch.

6. The intelligent weighing system according to claim 2, characterized in that said digital junction box (20) further comprises a fault light (26), said fault light (26) being connected with said control chip (23).

7. Intelligent weighing system according to claim 1, characterized in that the programmable logic controller (40) forms a communication link with an external host computer (60) and/or a 5G server (70) via the 5G router (50).