CN215448149U - Compound weighing monitoring device - Google Patents

Abstract

The utility model discloses a compound weighing monitoring device, which comprises a power supply module, a measuring module, a main connecting module and a processing module, wherein the main connecting module is connected with the power supply module; the power supply module is respectively connected with the measuring module, the processing module and the main connecting module and supplies power; the measuring module comprises a plurality of scales which are sequentially arranged in the vertical direction, and a plurality of measuring signals are obtained after the object to be measured is measured for one time; the main connecting module is respectively connected with the measuring module and the processing module and is used for transmitting a plurality of measuring signals measured by the measuring module to the processing module for processing; the processing module judges the difference value of the measurement signals for measuring the same object and monitors whether the working state of the weighing control terminal is abnormal or not. The compound weighing monitoring device provided by the utility model can enable the two metering scales to be weighed once through one-time weighing action, reduces actions of hoisting, transferring and the like for respectively weighing the two scales, and saves time and transferring cost for personnel and equipment.

Description

Compound weighing monitoring device

Technical Field

The utility model particularly relates to a compound weighing monitoring device.

Background

In some metering occasions, such as valuables, medicament formulas, chemical ingredients and the like, the weight of the objects needs to be precisely weighed, a metering scale with high metering precision (for example, the precision is 15000e and 30000e) is often selected, but sometimes the metering scale or a scale instrument and the like are not found in time after a fault occurs, and the products leaving the factory in the period of time can cause great economic loss and even accidents.

Therefore, 2 high-precision weighing scales can be selected to weigh for 2 times in some occasions, and the numerical deviation of each weighing is guaranteed to be within the precision range of the scales, so that the economic loss and accidents caused by the fact that faults of the weighing scales or the meters are not found in time are guaranteed. However, one object is weighed once on 2 scales respectively, the object needs to be placed on the first weighing scale and then transferred to the second weighing scale after being weighed, and for objects with large volume and heavy weight, such as precious metal ingots, precious powder bags, extremely toxic object barrels and the like, multiple weighing actions need to be matched by a forklift, an overhead traveling crane and the like, so that the efficiency is low, and the participation of equipment and personnel is high.

SUMMERY OF THE UTILITY MODEL

The utility model aims to provide a compound weighing monitoring device which can monitor whether the working state of a scale is abnormal or not.

The utility model provides a compound weighing monitoring device, which comprises a power module, a measuring module, a main connecting module and a processing module, wherein the main connecting module is connected with the power module; the power supply module is respectively connected with the measuring module, the processing module and the main connecting module and supplies power; the measuring module comprises a plurality of scales which are sequentially arranged in the vertical direction, and a plurality of measuring signals are obtained after the object to be measured is measured for one time; the main connecting module is respectively connected with the measuring module and the processing module and is used for transmitting a plurality of measuring signals measured by the measuring module to the processing module for processing; the processing module judges the difference value of the measurement signals for measuring the same article and monitors whether the working state of the scale is abnormal or not.

The compound weighing monitoring device also comprises a computer monitoring loop, and the computer monitoring loop comprises a computer connecting module and a computer; the computer is connected to the main connecting module through the computer connecting module and is used for displaying a plurality of times of measuring signals of the compound weighing monitoring device and giving an alarm when the work is abnormal.

The measuring module comprises an upper scale and a lower scale; the upper scale is placed above the lower scale along the gravity direction; the measuring module is used for weighing once and simultaneously acquiring an upper weighing signal and a lower weighing signal.

The upper scale and the lower scale both adopt a weighing control terminal with the model number IND 331.

The main connecting module comprises a first RS232 converter, a second RS232 converter, a third RS232 converter, a first RS485 converter and a second RS485 converter; the computer connecting module comprises a fourth RS232 converter and a third RS485 converter; the first RS232 converter, the second RS232 converter, the third RS232 converter and the fourth RS232 converter adopt a USB-to-RS 232 converter with the model number of UT 8801; the first RS485 converter, the second RS485 converter and the third RS485 converter adopt RS 232-to-RS 485 converters with the model number of UT 201B; the upper scale is sequentially connected in series with a first RS232 converter and a first RS485 converter, then is connected with the PLC, and transmits an upper scale signal to the PLC; the down balance is sequentially connected in series with a second RS232 converter, a second RS485 converter and a third RS232 converter, then is connected with the PLC, and transmits a down balance signal to the PLC; the PLC is sequentially connected in series with the third RS232 converter, the third RS485 converter and the fourth RS232 converter, then is connected with the computer and is communicated with the computer; when the error of the upper weighing data and the lower weighing data is smaller than the preset error, the compound weighing monitoring device works normally, otherwise, the compound weighing monitoring device outputs an alarm signal and reminds.

The main connecting module also comprises a Tuoli 485 serial port plate, a PROFIBUS bus connection or a DeviceNet bus connection.

The processing module adopts PLC of free port communication, modbus communication, Profibus communication or DeviceNet communication.

The processing module specifically adopts a PLC with the model number of 200 smart.

The compound weighing monitoring device provided by the utility model can enable the two metering scales to be weighed once through one-time weighing action, reduces actions of hoisting, transferring and the like for respectively weighing the two scales, and saves time and transferring cost for personnel and equipment.

Drawings

FIG. 1 is a functional block diagram of a hardware device according to the present invention.

Fig. 2 is a circuit structure diagram of a hardware device according to the present invention.

Fig. 3 is a schematic front view of the device structure according to the embodiment of the present invention.

Detailed Description

FIG. 1 is a functional block diagram of a hardware device of the present invention: the utility model provides a compound weighing monitoring device, which comprises a power module, a measuring module, a main connecting module and a processing module, wherein the main connecting module is connected with the power module; the power supply module is respectively connected with the measuring module, the processing module and the main connecting module and supplies power; the measuring module comprises a plurality of scales which are sequentially arranged in the vertical direction, and a plurality of measuring signals are obtained after the object to be measured is measured for one time; the main connecting module is respectively connected with the measuring module and the processing module and is used for transmitting a plurality of measuring signals measured by the measuring module to the processing module for processing; the processing module judges the difference value of the measurement signals for measuring the same article and monitors whether the working state of the scale is abnormal or not.

In this embodiment, the main connection module is connected by using RS232 to RS485, and in specific application, the main connection module can also be connected by using toledo 485 serial port board or PLC option board modes such as PROFIBUS and DeviceNet.

The compound weighing monitoring device also comprises a computer monitoring loop, wherein the computer monitoring loop comprises a computer connecting module and a computer (PC); the computer is connected to the main connecting module through the computer connecting module and is used for displaying a plurality of times of measuring signals of the compound weighing monitoring device and giving an alarm when the work is abnormal.

Fig. 2 is a schematic circuit diagram of a hardware device according to the present invention. The measuring module comprises an upper scale and a lower scale; the upper scale and the lower scale both adopt a Mettler-Torledo weighing control terminal with the model number of IND331, and can also adopt other models of weighing control terminals; the main connection module comprises a first RS232 converter U1, a second RS232 converter U2, a third RS232 converter U3, a first RS485 converter U5 and a second RS485 converter U6; the computer connecting module comprises a fourth RS232 converter U4 and a third RS485 converter U7; the first RS232 converter U1, the second RS232 converter U2, the third RS232 converter U3 and the fourth RS232 converter U4 adopt a Utai USB-to-RS 232 converter with the model number of UT 8801; the first RS485 converter U5, the second RS485 converter U6 and the third RS485 converter U7 adopt Yuntai RS 232-to-RS 485 converters with the model number of UT 201B; the processing module adopts a PLC with a Siemens model number of 200smart, and can also adopt other brands of PLCs supporting free port communication, modbus communication or Profibus and DeviceNet communication, and the main connecting module can adopt corresponding communication modes of RS232 to RS485, free port communication or modbus communication, Profibus communication or DeviceNet communication and the like.

In the embodiment, the +5V end is connected with a power supply; the upper GND end is grounded; the RXD pin is connected with the pin 2 of the first RS232 converter and receives signals, and the TXD pin is connected with the pin 3 of the first RS232 converter and outputs a weighing measurement signal; the +5V end of the lower scale is connected with a power supply; the GND end of the lower scale is grounded; the RXD pin called below is connected with the pin 2 of the second RS232 converter and receives signals; the TXD pin of the next scale is connected with the 3 pin of the second RS232 converter, and outputs a next scale measuring signal; the 232 port of the first RS485 converter is connected with the first RS232 converter, the A + end of the first RS485 converter is connected with the TX/B pin of the first port Prot1 of the PLC, and the B-end of the first RS485 converter is connected with the RX/A end of the first port of the PLC; the first port of the PLC is used for receiving a weighing measurement signal; the 232 port of the second RS485 converter is connected with the second RS232 converter; the A + end of the second RS485 converter is connected with the 3 pin of the third RS232 converter, and the A + pin of the second RS485 converter is connected with the A + end of the third RS485 converter; the B-end of the second RS485 converter is connected with the 8 pin of the third RS232 converter, and the B-pin of the second RS485 converter is connected with the B-end of the third RS485 converter; a pin 3 of the third RS232 converter is connected with the end B of a second port (Prot0) of the PLC, and a pin 8 of the third RS232 converter is connected with the end of the second port of the PLC and carries out communication; and the 232 end of the third RS485 converter is connected with a fourth RS232 converter, and the fourth RS232 converter is connected with a PC and uploads an upbalance signal, a downgrade signal and a signal processed by the PLC.

In the embodiment, the upper scale is connected with the PLC after being sequentially connected in series with the first RS232 converter and the first RS485 converter, and transmits the upper scale signal to the PLC; the down balance is sequentially connected in series with a second RS232 converter, a second RS485 converter and a third RS232 converter, then is connected with the PLC, and transmits a down balance signal to the PLC; the PLC is sequentially connected in series with the third RS232 converter, the third RS485 converter and the fourth RS232 converter, then is connected with the computer and is communicated with the computer; when the error of the upper weighing data and the lower weighing data is smaller than the preset error, the compound weighing monitoring device works normally, otherwise, the compound weighing monitoring device outputs an alarm signal and reminds.

In the embodiment, the upper scale is placed above the lower scale along the gravity direction, and is used for weighing once and simultaneously acquiring the upper scale signal and the lower scale signal.

Fig. 3 is a schematic front view of the device structure according to the embodiment of the present invention. Wherein 1 is called goods; 2, weighing; 3 is a weighing instrument; 4 is a scale-down instrument; 5, weighing down; 6 is a scale frame; and 7, a control system. The upper metering scale 2 is arranged on the lower metering scale 5, the lower metering scale 5 is arranged on the scale frame 6, the scale frame 6 is made of steel structures or other materials, the binding is solid and reliable, the deformation is small under a heavy object, and if the flatness of the scale foundation meets the requirement, the metering scale is directly arranged on the scale foundation. The weighing instrument 3 is connected with the weighing scale 2 through a special cable, and the weight of an object weighed by the weighing scale 2 is displayed on the weighing instrument 3; balance 5 links to each other through private cable under balance instrument 4 and the measurement, and the object weight that 5 of weighing down in the measurement was weighed shows on balance instrument 4 down, goes up balance instrument 3 and 4 band communication functions of balance instrument down, compares weighing value transmission to control system 7. Because the upper metering scale 2 is superposed and arranged on the lower metering scale 5, the weighed weight of the upper metering scale 2 is peeled and reset through the lower scale instrument. When the weighed goods 1 are placed to the upper scale 2, the upper scale 2 and the lower scale 5 can simultaneously acquire weighing data, the weighing data are respectively sent to the control system 7 through the upper scale instrument 3 and the lower scale instrument 4 for comparison, if the difference between the two values is within the scale precision range, the weighing is correct, otherwise, the weighing is wrong, and the machine needs to be stopped immediately to check the fault or to be calibrated again. 2 weighers of weighing at every turn all compare each other, and arbitrary weigher or instrument break down and all can be found immediately, and the numerical value of weighing of two weighers can be obtained in the action of once weighing in addition, need not to go to actions such as hoist and mount, the transfer of 2 weighers respectively.

In conclusion, the utility model can ensure that two weighing scales are compared with each other each time, and any one weighing scale or instrument can be found immediately after a fault occurs, thereby preventing serious economic loss and serious accidents caused by the fact that the scale fails and is not found in time. In addition, the two metering scales can be weighed once through one-time weighing action, so that the actions of hoisting, transferring and the like for respectively weighing the two metering scales are reduced, and the time and the transferring cost of personnel and equipment are saved.

Claims (8)

1. A compound weighing monitoring device is characterized by comprising a power module, a measuring module, a main connecting module and a processing module; the power supply module is respectively connected with the measuring module, the processing module and the main connecting module and supplies power; the measuring module comprises a plurality of scales which are sequentially arranged in the vertical direction, and a plurality of measuring signals are obtained after the object to be measured is measured for one time; the main connecting module is respectively connected with the measuring module and the processing module and is used for transmitting a plurality of measuring signals measured by the measuring module to the processing module for processing; the processing module judges the difference value of the measurement signals for measuring the same article and monitors whether the working state of the scale is abnormal or not.

2. The compound weighing monitoring device of claim 1, further comprising a computerized monitoring circuit, the computerized monitoring circuit comprising a computerized connection module and a computer; the computer is connected to the main connecting module through the computer connecting module and is used for displaying a plurality of times of measuring signals of the compound weighing monitoring device and giving an alarm when the work is abnormal.

3. A compound weighing monitoring device according to one of claims 1-2, wherein the measuring module comprises an upper scale and a lower scale; the upper scale is placed above the lower scale along the gravity direction; the measuring module is used for weighing once and simultaneously acquiring an upper weighing signal and a lower weighing signal.

4. The compound weight monitoring device of claim 3, wherein the upper scale and the lower scale each employ a weight control terminal having a model number IND 331.

5. The compound weighing monitoring device according to claim 4, wherein the main connection module comprises a first RS232 converter, a second RS232 converter, a third RS232 converter, a first RS485 converter and a second RS485 converter; the computer connecting module comprises a fourth RS232 converter and a third RS485 converter; the first RS232 converter, the second RS232 converter, the third RS232 converter and the fourth RS232 converter adopt a USB-to-RS 232 converter with the model number of UT 8801; the first RS485 converter, the second RS485 converter and the third RS485 converter adopt RS 232-to-RS 485 converters with the model number of UT 201B; the upper scale is sequentially connected in series with a first RS232 converter and a first RS485 converter, then is connected with the PLC, and transmits an upper scale signal to the PLC; the down balance is sequentially connected in series with a second RS232 converter, a second RS485 converter and a third RS232 converter, then is connected with the PLC, and transmits a down balance signal to the PLC; the PLC is sequentially connected in series with the third RS232 converter, the third RS485 converter and the fourth RS232 converter, then is connected with the computer and is communicated with the computer; when the error of the upper weighing data and the lower weighing data is smaller than the preset error, the compound weighing monitoring device works normally, otherwise, the compound weighing monitoring device outputs an alarm signal and reminds.

6. The compound weigh monitoring apparatus of claim 5 wherein the main connection module further comprises a toledo 485 serial port plate, a PROFIBUS bus connection or a DeviceNet bus connection.

7. The compound weigh monitoring apparatus of claim 6 wherein the processing module employs a PLC of free port communication, modbus communication, Profibus communication or DeviceNet communication.

8. The compound weighing monitoring device according to claim 6, wherein the processing module is specifically a PLC model 200 smart.

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