CN215114832U - Digital weighing sensor with redundant design - Google Patents

Abstract

The utility model provides a digital weighing sensor with redundant design, include: the force measuring element is used for detecting the loading force of the digital weighing sensor, and each force measuring element converts the loading force into one path of analog signal; and each force measuring element is connected with at least one analog-to-digital conversion module, and the analog-to-digital conversion module converts the analog signals into digital signals. The utility model discloses a digital weighing sensor all provides the redundancy design for dynamometry element and analog-to-digital conversion module at least, can ensure digital weighing sensor's normal fortune effectively and do.

Description

Digital weighing sensor with redundant design

Technical Field

The utility model relates to a precision instruments field especially relates to a digital weighing sensor with redundant design.

Background

In modern industrial processes, weight information is a key source of information and control objective. For example, in a vehicle weighing system, weight information is the output data that needs to be obtained; on the filling line, the weight information is the control target of the filling production process. The reliability and accuracy of the weighing is therefore of great significance.

With the development of digitization and informatization technologies, weighing devices have shifted from traditional mechanical systems to digital systems. The digital weighing sensor is a circuit with high-precision analog-digital conversion function and digital processing capability, which is arranged in the sensor, converts the loading force information of the sensor into a digital signal, processes the digital signal according to the requirement, and displays the digital signal at a user terminal. In weighing systems based on digital load cells, the reliability of the weighing data obtained by the digital load cells is of great significance.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to provide a digital weighing sensor of multiple redundant design with high reliability.

In order to solve the technical problem, the utility model provides a digital weighing sensor with redundant design, a serial communication port, include: the force measuring element is used for detecting the loading force of the digital weighing sensor, and each force measuring element converts the loading force into one path of analog signal; and each force measuring element is connected with at least one analog-to-digital conversion module, and the analog-to-digital conversion module converts the analog signals into digital signals.

In an embodiment of the present invention, each of the force measuring elements is connected to at least two of the analog-to-digital conversion modules.

In an embodiment of the present invention, the apparatus further includes one or more processors, each of the analog-to-digital conversion modules is connected to at least one of the processors, and the processors process the digital signals.

In an embodiment of the present invention, the system further includes one or more storage units, and each of the processors is connected to at least one of the storage units.

In an embodiment of the present invention, the system further includes one or more power units, and each of the processors is connected to at least one of the power units.

In an embodiment of the present invention, the mobile terminal further includes one or more communication units, each of the processors is connected to at least one of the communication units, and the communication unit is adapted to communicate with an external device.

The utility model discloses an in an embodiment, still include alarm unit, the treater is compared digital signal and threshold value obtain the comparative result, according to the comparative result suggestion alarm unit sends the warning.

In an embodiment of the present invention, the processor calculates the difference between the at least two paths of the digital signals, and the difference is used for analyzing the fault trend.

In an embodiment of the present invention, in the loading process of the digital weighing sensor, the processor compares at least two paths of the digital signals to obtain a dynamic comparison result.

The utility model discloses an in an embodiment, still include alarm unit, the treater is compared dynamic comparison result and dynamic threshold value scope obtain dynamic comparison result, according to the suggestion of dynamic comparison result alarm unit sends the warning.

In an embodiment of the present invention, the device further comprises one or more limiting protection devices, wherein the limiting protection devices limit the digital weighing sensor in a predetermined area.

The utility model discloses a digital weighing sensor all provides the redundant design for dynamometry element and analog-to-digital conversion module, can ensure digital weighing sensor's normal fortune effectively and do. The utility model discloses a digital weighing sensor still further provides the redundancy design for relevant treater, the memory cell of detection circuitry, for functional element such as electrical unit, communication unit, alarm unit provides the redundancy design to and for the safety device including spacing protection device provides the redundancy design, provide multiple safety guarantee for digital weighing sensor from a plurality of angles, improved digital weighing sensor's reliability greatly.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the application and together with the description serve to explain the principle of the invention. In the drawings:

fig. 1 is a block diagram of a digital weighing sensor according to an embodiment of the present invention;

fig. 2 is a block diagram of a digital load cell according to yet another embodiment of the present invention;

fig. 3 is a block diagram of a digital load cell according to yet another embodiment of the present invention;

fig. 4 is a schematic structural view of a load cell in a digital load cell according to an embodiment of the present invention.

Detailed Description

In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below. It is obvious that the drawings in the following description are only examples or embodiments of the application, from which the application can also be applied to other similar scenarios without inventive effort for a person skilled in the art. Unless otherwise apparent from the context, or otherwise indicated, like reference numbers in the figures refer to the same structure or operation.

As used in this application and the appended claims, the terms "a," "an," "the," and/or "the" are not intended to be inclusive in the singular, but rather are intended to be inclusive in the plural unless the context clearly dictates otherwise. In general, the terms "comprises" and "comprising" merely indicate that steps and elements are included which are explicitly identified, that the steps and elements do not form an exclusive list, and that a method or apparatus may include other steps or elements.

The relative arrangement of the components and steps, the numerical expressions, and numerical values set forth in these embodiments do not limit the scope of the present application unless specifically stated otherwise. Meanwhile, it should be understood that the sizes of the respective portions shown in the drawings are not drawn in an actual proportional relationship for the convenience of description. Techniques, methods, and apparatus known to those of ordinary skill in the relevant art may not be discussed in detail but are intended to be part of the specification where appropriate. In all examples shown and discussed herein, any particular value should be construed as merely illustrative, and not limiting. Thus, other examples of the exemplary embodiments may have different values. It should be noted that: like reference numbers and letters refer to like items in the following figures, and thus, once an item is defined in one figure, further discussion thereof is not required in subsequent figures.

In the description of the present application, it is to be understood that the orientation or positional relationship indicated by the directional terms such as "front, rear, upper, lower, left, right", "lateral, vertical, horizontal" and "top, bottom", etc., are generally based on the orientation or positional relationship shown in the drawings, and are used for convenience of description and simplicity of description only, and in the case of not making a reverse description, these directional terms do not indicate and imply that the device or element being referred to must have a particular orientation or be constructed and operated in a particular orientation, and therefore, should not be considered as limiting the scope of the present application; the terms "inner and outer" refer to the inner and outer relative to the profile of the respective component itself.

Spatially relative terms, such as "above … …," "above … …," "above … …," "above," and the like, may be used herein for ease of description to describe one device or feature's spatial relationship to another device or feature as illustrated in the figures. It will be understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientation depicted in the figures. For example, if a device in the figures is turned over, devices described as "above" or "on" other devices or configurations would then be oriented "below" or "under" the other devices or configurations. Thus, the exemplary term "above … …" can include both an orientation of "above … …" and "below … …". The device may be otherwise variously oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly.

It should be noted that the terms "first", "second", and the like are used to define the components, and are only used for convenience of distinguishing the corresponding components, and the terms have no special meanings unless otherwise stated, and therefore, the scope of protection of the present application is not to be construed as being limited. Further, although the terms used in the present application are selected from publicly known and used terms, some of the terms mentioned in the specification of the present application 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. Further, it is required that the present application is understood not only by the actual terms used but also by the meaning of each term lying within.

Fig. 1 is a block diagram of a digital weighing sensor according to an embodiment of the present invention. Referring to fig. 1, the digital load cell 100 of this embodiment includes at least one load cell 110 for detecting the loading force of the digital load cell 100, and each load cell 110 converts the loading force measured by it into a single analog signal; and one or more analog-to-digital conversion modules 120, each load cell 110 being connected to at least one analog-to-digital conversion module 120, the analog-to-digital conversion module 120 converting analog signals into digital signals.

Referring to fig. 1, three load cells 111, 112, 113 are shown, as well as three analog-to- digital conversion modules 121, 122, 123. The digital load cell 100 comprises at least a load cell 111, represented by a solid-line frame, and an analog-to-digital conversion module 121, the load cell 111 and the analog-to-digital conversion module 121 being interconnected, represented in fig. 1 by solid lines with arrows. The analog-to-digital conversion module 121 receives an analog signal from the load cell 111 and converts the analog signal to a digital signal. The digital signal may be used for subsequent processing, display, etc.

Referring to FIG. 1, the digital load cell 100 may also include load cells 112, 113 and analog-to- digital conversion modules 122, 123, represented by dashed boxes. Since each load cell 110 is connected to at least one analog-to-digital conversion module 120, for the embodiment shown in fig. 1, the load cell 111 is connected to at least one of the analog-to-digital conversion modules 120, at most to each analog-to-digital conversion module, as indicated by the dashed arrow in fig. 1; similarly, the load cell 112 is connected to at least one of the analog-to-digital conversion modules 120, and may be connected to at most each analog-to-digital conversion module; the load cell 113 is connected to at least one of the analog-to-digital conversion modules 120 and at most to each analog-to-digital conversion module.

It will be appreciated that when all the dotted lines with arrows in fig. 1 are shown as actual connections, the digital load cell forms an interconnection network between the 3 load cells 111, 112, 113 and the 3 analog-to- digital conversion modules 121, 122, 123, each analog-to-digital conversion module 120 being capable of receiving and processing 3 analog signals from the 3 load cells 111, 112, 113. In this case, the digital load cell 100 can be normally used as long as one load cell 110 and one analog-to-digital conversion module 120 are in a normal operation state, and when there is a load, a weighing result can be normally output, thereby improving the reliability of the digital load cell 100.

It should be noted that the illustration in fig. 1 is merely an example, and is not intended to limit the number and connection relationship of the force-measuring elements and the analog-to-digital conversion modules in the digital load cell of the present invention.

In some embodiments, each load cell is connected to at least two analog-to-digital conversion modules.

Fig. 2 is a block diagram of a digital load cell according to another embodiment of the present invention. Referring to FIG. 2, the digital load cell 200 of this embodiment includes a load cell 210 and 2 analog-to-digital conversion modules 220. Fig. 2 shows a preferred embodiment of the present invention, in which the force measuring cell 210 converts the load force into a path of analog signal S _ a1, and transmits the analog signal S _ a1 to 2 analog-to- digital conversion modules 221 and 222, respectively. The 2 analog-to- digital conversion modules 221 and 222 can simultaneously convert the analog signal S _ a1 into digital signals S _ d1 and S _ d2, and transmit the digital signals S _ d1 and S _ d2 to subsequent processing modules for processing, displaying, and the like.

According to the preferred embodiment shown in fig. 2, each load cell is connected to at least 2 analog-to-digital conversion modules, which ensures that when one analog-to-digital conversion module fails, a redundantly designed analog-to-digital conversion module is provided for receiving the analog signals of the load cells and processing the analog signals, so as to ensure that the digital load cell 200 can obtain valid measurement results, and to improve the reliability of the digital load cell 200.

In some embodiments, the digital weighing sensor of the present invention further comprises one or more processors, each analog-to-digital conversion module is connected to at least one processor, and the processor processes the digital signal.

Continuing to refer to FIG. 2, this embodiment also includes 2 processors 231, 232. The analog-to-digital conversion module 221 is connected to the processor 231, and the analog-to-digital conversion module 222 is connected to the processor 232. It is understood that the analog-to-digital conversion module 221 may be connected to the processors 231, 232 at the same time, and the analog-to-digital conversion module 222 may be connected to the processors 231, 232 at the same time. If only one processor is included in the digital load cell, the analog-to- digital conversion modules 221, 222 may both be connected to the one processor, which may together process the digital signals S _ d1, S _ d2 output by the analog-to- digital conversion modules 221, 222.

In some embodiments, the processor calculates a difference between the at least two digital signals, the difference being used for fault trend analysis. Referring to fig. 2, the processors 231 and 232 may perform any processing after obtaining the digital signals S _ d1 and S _ d2 from the analog-to- digital conversion modules 221 and 222. In these embodiments, the processors 231, 232 calculate the difference Diff between the two digital signals S _ d1, S _ d 2. For a digital load cell in a normal state, the two digital signals S _ d1 and S _ d2 should have a certain expected value, for example, the two digital signals S _ d1 and S _ d2 should be identical, proportional, different within a certain range, symmetrical, and the like. The difference Diff between the two actually obtained digital signals S _ d1 and S _ d2 is calculated and compared with the expected result, so that the failure trend analysis of the digital weighing sensor can be used as a failure trend analysis to prompt a user of the risk that failure may occur. For example, the difference Diff between the two digital signals S _ d1 and S _ d2 should be within a difference range Diff1, and if the difference Diff calculated by the processors 231 and 232 approaches or exceeds the boundary value of the difference range Diff1, the user may be prompted that the digital load cell is at a high risk of failure. Through long-term calculation and recording, a fault trend analysis curve can be drawn, and the prediction of a user on fault risks is facilitated.

In some embodiments, the processor may further compare the at least two digital signals to obtain a dynamic comparison result during loading of the digital load cell. The so-called loading process is a process directed to adding a load to the digital load cell, the load referring to the object to be weighed. In the process, the digital weighing sensor is in a dynamic state, the weighing result of the digital weighing sensor is also in a dynamic state, and a stable weighing result can be obtained only after a certain time passes after the loading is finished and is used as the weighing result of the load. Referring to fig. 2, the processors 231 and 232 may compare the two digital signals S _ d1 and S _ d2 during the loading process to obtain a dynamic comparison result Diff _ d, which may reflect real-time loaded information of the digital load cell. The storage unit may store the dynamic comparison result Diff _ d so that the user can view or analyze the real-time loading condition of the digital weighing cell. When the weighing result is abnormal, the reason of the abnormality can be analyzed by referring to the real-time loading condition.

The plurality of processors in the embodiment realize the redundant design of the processors in the digital weighing sensor, and when a single processor fails, the processors in a normal state can still receive the digital signals output by the analog-to-digital conversion module and further control each element in the digital weighing sensor.

In some embodiments, the digital load cell of the present invention further comprises one or more memory units, and each processor is connected to at least one memory unit.

Continuing to refer to FIG. 2, this embodiment also includes 2 memory cells 241, 242. The storage unit 241 is connected to the processor 231, and the storage unit 242 is connected to the processor 232. It is to be appreciated that the storage unit 241 may be coupled to both processors 231, 232 and the storage unit 242 may be coupled to both processors 231, 232. If only one memory unit is included in the digital load cell, the processors 231, 232 may both be connected to the one memory unit, which may simultaneously store the digital signals S _ d1, S _ d2 output by the analog-to- digital conversion modules 221, 222, and the data, instructions, etc. sent or received by the processors 231, 232.

In some embodiments, the storage unit is used for storing configuration information of the digital weighing sensor, threshold values, data and other information required in the process of processing the digital signals.

The multiple memory cells in this embodiment enable a redundant design of the memory cells in the digital load cell, and when an individual memory cell fails, the memory cell in the normal state can still operate.

In some embodiments, the digital load cell of the present invention further comprises one or more power supply units, each processor being connected to at least one of the power supply units.

With continued reference to fig. 2, there are also 2 power supply units 251, 252 included in this embodiment. The power supply unit 251 is connected to the processor 231, and the power supply unit 252 is connected to the processor 232. Referring to FIG. 2, the power supply units 251, 252 may also provide power to other units or modules in the digital load cell 200, such as to the analog-to- digital conversion modules 221, 222, the storage units 241, 242, the communication units 261, 262, and the alarm unit 270, respectively.

It is understood that the power supply unit 251 may be simultaneously connected to the processors 231, 232, and the power supply unit 252 may be simultaneously connected to the processors 231, 232. If only one power supply unit is included in the digital load cell 200, both processors 231, 232 may be connected to the one power supply unit.

The multiple power supply units in this embodiment implement a redundant design of the power supply units in the digital load cell, and when a failure occurs in a particular power supply unit, the power supply unit in a normal state can still operate to ensure the normal operation of the digital load cell 200.

In some embodiments, the digital load cell of the present invention further comprises one or more communication units, each processor being connected to at least one communication unit, the communication unit being adapted to communicate with an external device.

Continuing to refer to fig. 2, this embodiment also includes 2 communication units 261, 262. The communication unit 261 is connected to the processor 231, and the communication unit 262 is connected to the processor 232. It is to be understood that the communication unit 261 may be simultaneously connected with the processors 231, 232, and the communication unit 262 may be simultaneously connected with the processors 231, 232. If only one communication unit is included in the digital load cell 200, the processors 231, 232 may both be connected to the one communication unit, which may operate according to control instructions of the processors 231, 232, and may transmit the digital signals S _ d1, S _ d2 from the different analog-to- digital conversion modules 221, 222 to a display, a user interface, or the like.

The utility model discloses do not limit to the concrete communication mode of communication unit 261, 262, can adopt wired, wireless etc. field common techniques. The communication network 0 employed may include a cable network, a wired network, a fiber optic network, a telecommunications network, an intranet, a Wireless Local Area Network (WLAN), a Metropolitan Area Network (MAN), a Public Switched Telephone Network (PSTN), a bluetooth (TM) network, a zigbee (TM) network, a Near Field Communication (NFC) network, the like, or any combination thereof.

The plurality of communication units in this embodiment enable a redundant design of the communication units in the digital load cell, and when a failure occurs in an individual communication unit, the communication unit in a normal state can still operate.

In some embodiments, the digital weighing sensor of the present invention further comprises an alarm unit, wherein the processor compares the digital signal with the threshold value to obtain a comparison result, and prompts the alarm unit to send an alarm according to the comparison result.

Referring to fig. 2, the embodiment further includes an alarm unit 270, the processors 231 and 232 are connected to the alarm unit 270, and the power supply units 251 and 252 may also be connected to the alarm unit 270 to supply power thereto. The utility model discloses do not limit to alarm unit 270's quantity, can include a plurality of alarm units, as alarm unit's redundant design, every treater is connected with an alarm unit respectively.

In these embodiments, the threshold Th may be stored in the storage units 241 and 242, or may be stored in the caches of the processors 231 and 232. During use of the digital load cell 200, the processors 231, 232 compare the digital signals S _ d1, S _ d2 obtained from the analog-to- digital conversion modules 221, 222 with the threshold Th to obtain a comparison result. The utility model discloses do not do the restriction to specific comparison method, the skilled in the art can adopt arbitrary comparison method. For example: comparing the sizes, the obtained comparison result may include: the digital signal is greater than the threshold Th, the digital signal is equal to the threshold Th, and the digital signal is equal to the threshold Th. When there are a plurality of digital signals, different thresholds may be set for the digital signals obtained by different analog-to-digital conversion modules. For example, if the threshold Th1 is set for the digital signal S _ d1 and the threshold Th2 is set for the digital signal S _ d2, the processors 231 and 232 respectively compare the digital signal S _ d1 with the threshold Th1 and compare the digital signal S _ d2 with the threshold Th2 to obtain 2 comparison results in the present embodiment.

The digital signals S _ d1 and S _ d2 may be steady-state data of the digital load cell 200 in a steady state, or dynamic data during the dynamic process of weighing.

In some embodiments, the processor compares the dynamic comparison result with the dynamic threshold range to obtain a dynamic comparison result, and prompts the alarm unit to issue an alarm according to the dynamic comparison result. The dynamic comparison result refers to a dynamic comparison result Diff _ d obtained by comparing at least two paths of digital signals by a processor in the loading process of the digital weighing sensor. Referring to fig. 2, the processors 231 and 232 may also compare the dynamic comparison result Diff _ d with a preset dynamic threshold range Diff _ d1, and prompt the alarm unit 270 to issue an alarm according to the dynamic comparison result. For example, when the dynamic comparison result Diff _ d exceeds the dynamic threshold range Diff _ d1, the alarm unit 270 issues an alarm.

Fig. 3 is a block diagram of a digital load cell according to another embodiment of the present invention. Referring to FIG. 3, the digital load cell 300 of this embodiment includes 2 load cells 310 and 2 analog-to-digital conversion modules 320. Fig. 3 is a preferred embodiment of the present invention, in which the force measuring element 311 converts the load force into an analog signal S _ a1, and transmits the analog signal S _ a1 to the analog-to-digital conversion module 221, and the force measuring element 312 converts the load force into an analog signal S _ a2, and transmits the analog signal S _ a2 to the analog-to-digital conversion module 222. The analog-to- digital conversion modules 221 and 222 respectively convert the analog signals S _ a1 and S _ a2 into digital signals S _ d1 and S _ d2, and send the digital signals S _ d1 and S _ d2 to subsequent processing modules for processing, displaying and the like.

According to the embodiment shown in FIG. 3, the digital load cell 300 may include a plurality of load cells 311, 312, and the plurality of load cells 311, 312 may be distributed at various locations within the digital load cell 300, and each load cell may detect a load force and convert the load force to a single analog signal under normal conditions when loaded.

The difference between the embodiment shown in fig. 3 and the embodiment shown in fig. 2 is that the load cells 311, 312 are redundant, and when one load cell fails, the other load cell can work normally, so as to ensure that the digital load cell 300 can output a weighing result normally.

The embodiment shown in fig. 3 may also include 2 processors 331, 332, 2 storage units 341, 342, 2 power supply units 351, 352, 2 communication units 361, 362, and an alarm unit 370 similar to the embodiment shown in fig. 2. The connection and functions of these elements can refer to the corresponding description of fig. 2, and are not repeated here.

Fig. 4 is a schematic structural view of a load cell in a digital load cell according to an embodiment of the present invention. Referring to fig. 4, one configuration of a load cell 410 is shown, namely a bridge configuration comprising 4 resistors. The two outputs of the bridge configuration are connected to an analog-to-digital conversion unit 430. When a load is applied to the load cell 410, the load cell 410 converts the load force into an analog signal S _ a, and the analog-to-digital conversion unit 430 converts the analog signal S _ a into a digital signal analog signal S _ d, so as to facilitate subsequent operations such as processing and displaying.

In some embodiments, the load cell 410 may be a resistive strain gauge or a capacitive strain gauge.

In some embodiments, the digital load cell of the present invention further comprises one or more limit protectors that limit the digital load cell within a predetermined area.

Referring to fig. 4, a limit stop 420 may confine the digital load cell to a predetermined area for providing a redundant safety design for overloads and impacts. A limit stop 420 is shown in fig. 4 as a triangle. For example, when a load drops from above the load cell 410 onto the digital load cell, the limit guard 420 may ensure that the digital load cell does not move downward. Fig. 4 is not intended to limit the number, configuration, and specific location of the bump protectors 420.

The utility model discloses a digital weighing sensor has multiple redundant design, including but not limited to the redundant design to such weighing element of measuring cell, detection circuitry's including analog-to-digital conversion module, treater, memory cell etc. redundant design including functional element such as electrical unit, communication unit, alarm unit to and the redundant design of safety device including spacing protection device, provide multiple safety guarantee for digital weighing sensor from a plurality of angles, improved digital weighing sensor's reliability greatly.

Having thus described the basic concept, it will be apparent to those skilled in the art that the foregoing disclosure is by way of example only, and is not intended to limit the present application. Various modifications, improvements and adaptations to the present application may occur to those skilled in the art, although not explicitly described herein. Such modifications, improvements and adaptations are proposed in the present application and thus fall within the spirit and scope of the exemplary embodiments of the present application.

Also, this application uses specific language to describe embodiments of the application. Reference throughout this specification to "one embodiment," "an embodiment," and/or "some embodiments" means that a particular feature, structure, or characteristic described in connection with at least one embodiment of the present application is included in at least one embodiment of the present application. Therefore, it is emphasized and should be appreciated that two or more references to "an embodiment" or "one embodiment" or "an alternative embodiment" in various places throughout this specification are not necessarily all referring to the same embodiment. Furthermore, some features, structures, or characteristics of one or more embodiments of the present application may be combined as appropriate.

Similarly, it should be noted that in the preceding description of embodiments of the present application, various features are sometimes grouped together in a single embodiment, figure, or description thereof for the purpose of streamlining the disclosure and aiding in the understanding of one or more of the embodiments. This method of disclosure, however, is not intended to require more features than are expressly recited in the claims. Indeed, the embodiments may be characterized as having less than all of the features of a single embodiment disclosed above.

Numerals describing the number of components, attributes, etc. are used in some embodiments, it being understood that such numerals used in the description of the embodiments are modified in some instances by the use of the modifier "about", "approximately" or "substantially". Unless otherwise indicated, "about", "approximately" or "substantially" indicates that the number allows a variation of ± 20%. Accordingly, in some embodiments, the numerical parameters used in the specification and claims are approximations that may vary depending upon the desired properties of the individual embodiments. In some embodiments, the numerical parameter should take into account the specified significant digits and employ a general digit preserving approach. Notwithstanding that the numerical ranges and parameters setting forth the broad scope of the range are approximations, in the specific examples, such numerical values are set forth as precisely as possible within the scope of the application.

Claims (11)

1. A digital load cell with redundant design, comprising:

the force measuring element is used for detecting the loading force of the digital weighing sensor, and each force measuring element converts the loading force into one path of analog signal; and

each force measuring element is connected with at least one analog-to-digital conversion module, and the analog-to-digital conversion module converts the analog signals into digital signals.

2. The digital load cell of claim 1, wherein each of said load cells is connected to at least two of said analog-to-digital conversion modules.

3. The digital load cell of claim 1, further comprising one or more processors, each said analog-to-digital conversion module being coupled to at least one said processor, said processor processing said digital signals.

4. The digital load cell of claim 3, further comprising one or more memory units, each of said processors being coupled to at least one of said memory units.

5. The digital load cell of claim 3, further comprising one or more power supply units, each said processor being connected to at least one said power supply unit.

6. The digital load cell of claim 3, further comprising one or more communication units, each said processor being connected to at least one said communication unit, said communication unit being adapted to communicate with an external device.

7. The digital load cell of claim 3, further comprising an alarm unit, wherein the processor compares the digital signal to a threshold value to obtain a comparison result, and prompts the alarm unit to issue an alarm based on the comparison result.

8. The digital load cell of claim 3, wherein said processor calculates a difference between at least two of said digital signals, said difference being used for fault trend analysis.

9. The digital load cell of claim 3, wherein the processor compares at least two of the digital signals during loading of the digital load cell to obtain a dynamic comparison.

10. The digital load cell of claim 9, further comprising an alarm unit, wherein the processor compares the dynamic comparison result to a dynamic threshold range to obtain a dynamic comparison result, and prompts the alarm unit to issue an alarm based on the dynamic comparison result.

11. The digital load cell of claim 1, further comprising one or more limit stops that confine the digital load cell to a predetermined area.

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