CN114812760A - Double-output weighing sensor and manufacturing method thereof - Google Patents
Double-output weighing sensor and manufacturing method thereof Download PDFInfo
- Publication number
- CN114812760A CN114812760A CN202210444545.6A CN202210444545A CN114812760A CN 114812760 A CN114812760 A CN 114812760A CN 202210444545 A CN202210444545 A CN 202210444545A CN 114812760 A CN114812760 A CN 114812760A
- Authority
- CN
- China
- Prior art keywords
- compensation
- main
- sensor
- analog
- weight data
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
- 238000005303 weighing Methods 0.000 title claims abstract description 33
- 238000004519 manufacturing process Methods 0.000 title claims abstract description 14
- 230000037396 body weight Effects 0.000 claims abstract description 24
- 230000003068 static effect Effects 0.000 claims abstract description 9
- 238000006243 chemical reaction Methods 0.000 claims description 65
- 230000009977 dual effect Effects 0.000 claims description 20
- 238000003466 welding Methods 0.000 claims description 8
- 239000012528 membrane Substances 0.000 claims description 6
- 238000004806 packaging method and process Methods 0.000 claims description 4
- 230000007613 environmental effect Effects 0.000 description 8
- 238000000034 method Methods 0.000 description 8
- 238000005259 measurement Methods 0.000 description 5
- 239000003381 stabilizer Substances 0.000 description 4
- 230000005540 biological transmission Effects 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000003860 storage Methods 0.000 description 3
- 238000012360 testing method Methods 0.000 description 3
- 229920001971 elastomer Polymers 0.000 description 2
- 239000000806 elastomer Substances 0.000 description 2
- 230000005484 gravity Effects 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 238000012545 processing Methods 0.000 description 2
- 230000015572 biosynthetic process Effects 0.000 description 1
- 230000008094 contradictory effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 238000012937 correction Methods 0.000 description 1
- 238000013500 data storage Methods 0.000 description 1
- 230000005489 elastic deformation Effects 0.000 description 1
- 239000011888 foil Substances 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
- 230000000630 rising effect Effects 0.000 description 1
- 230000000087 stabilizing effect Effects 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Images
Classifications
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/13—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing having piezoelectric or piezoresistive properties
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G23/00—Auxiliary devices for weighing apparatus
- G01G23/01—Testing or calibrating of weighing apparatus
- G01G23/012—Testing or calibrating of weighing apparatus with load cells comprising in-build calibration weights
-
- G—PHYSICS
- G01—MEASURING; TESTING
- G01G—WEIGHING
- G01G3/00—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances
- G01G3/12—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing
- G01G3/14—Weighing apparatus characterised by the use of elastically-deformable members, e.g. spring balances wherein the weighing element is in the form of a solid body stressed by pressure or tension during weighing measuring variations of electrical resistance
- G01G3/142—Circuits specially adapted therefor
Landscapes
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Measurement Of Force In General (AREA)
Abstract
The invention provides a double-output weighing sensor and a manufacturing method thereof, wherein the double-output weighing sensor is characterized in that a compensation sensor is arranged in a main sensor; the main sensor collects the weight of the load body and sends the collected weight data of the current load body to the compensation unit; the compensation sensor collects the weight of the weight in the current state and sends the collected current weight data of the weight to the compensation unit; and the compensation unit compares the current weight data with the weight data in a static state, and compensates the current load body weight data according to a comparison result to obtain standard load body weight data. In the invention, the compensation sensor is arranged in the main sensor, and the current weight data of the load body is compensated by using the current weight data output by the compensation sensor arranged in the main sensor, so that the accurate weight data of the standard load body is obtained.
Description
Technical Field
The invention relates to the technical field of sensors, in particular to a double-output weighing sensor and a manufacturing method thereof.
Background
In industrial applications, there are irregular or low frequency vibrations in weighing applications, such as docks, ships, etc., due to equipment vibration and environmental factors. The existing dynamic weighing sensor is not enough to filter low-frequency vibration signals, so that the difference between the measured reading of the sensor and the actual mass is larger. How to correct the output under the vibration condition, eliminate the influence of the vibration, correct the measured value is an effective solution.
Can use another sensor to carry out this card to the measured value in the occasion of weighing in current correction scheme, but above-mentioned scheme for compensation weighing device's scale pan and weight are arranged in outdoors, contact with the air, can receive environmental factor influence when using for a long time, for example because of rusty or material scatter factors such as scale pan, lead to the weight quality inaccurate, influence measurement accuracy.
The above is only for the purpose of assisting understanding of the technical aspects of the present invention, and does not represent an admission that the above is prior art.
Disclosure of Invention
The invention mainly aims to provide a double-output weighing sensor and a manufacturing method thereof, and aims to solve the technical problem that accurate weighing data cannot be obtained due to the influence of environmental factors in the prior art.
To achieve the above object, the present invention provides a dual output weighing sensor, comprising: the dual output load cell includes: the device comprises a main sensor, a compensation sensor and a compensation unit;
the compensation sensor is arranged in the main sensor, and the main sensor and the compensation sensor are respectively connected with the compensation unit;
the main sensor is used for collecting the weight of the load body and sending the collected weight data of the current load body to the compensation unit;
the compensation sensor is used for collecting the weight of the weight in the current state and sending the collected current weight data of the weight to the compensation unit;
and the compensation unit is used for comparing the current weight data with the weight data in a static state, and compensating the current load weight data according to a comparison result to obtain standard load weight data.
Optionally, the primary sensor comprises: the sensor shell consists of a base, a sheath welding part and a top-layer diaphragm;
the sensor shell is internally provided with a main elastic body, and the main elastic body penetrates through a center hole of the top layer diaphragm and is arranged on the base.
Optionally, a number of main resistance strain gauges are further arranged in the sensor housing;
the main resistance strain gauge is arranged on a strain sensitive part of the main elastic body of the column type structure;
a certain number of the main resistance strain gauges form a main Wheatstone bridge;
the main Wheatstone bridge is connected with the compensation unit;
and the main Wheatstone bridge is used for collecting the weight of the load body and sending the collected weight data of the current load body to the compensation unit.
Optionally, a main analog-to-digital conversion unit is further arranged in the sensor housing;
the main analog-digital conversion unit is arranged on the main elastic body, and the main analog-digital conversion unit is respectively connected with the main Wheatstone bridge and the compensation unit;
the main analog-to-digital conversion unit is used for receiving the current load body weight data output by the main Wheatstone bridge and converting the current load body weight data into digital load body weight data;
the main analog-to-digital conversion unit is used for sending the digital load weight data to the compensation unit.
Optionally, the main analog-to-digital conversion unit includes: a main amplifier, a main analog-to-digital converter, a main microprocessor and a main memory;
the main amplifier is respectively connected with the main Wheatstone bridge and the main analog-to-digital converter, the main microprocessor is respectively connected with the main analog-to-digital converter and the main memory, and the main microprocessor is further connected with the compensation unit through a main interface.
Optionally, the compensation sensor comprises: a certain number of compensation resistance strain gauges, compensation elastomers with a sheet structure and weights;
the compensation elastic body is arranged on the base, the weights are arranged at one end of the compensation elastic body, and the compensation resistance strain gauges are symmetrically adhered to the front surface and the back surface of the compensation elastic body;
the compensation resistance strain gauges in a certain number form a compensation Wheatstone bridge;
wherein the compensation Wheatstone bridge is connected with the compensation unit;
and the compensation Wheatstone bridge is used for collecting the weight of the weight and sending the collected weight data of the current weight to the compensation unit.
Optionally, a compensation analog-to-digital conversion unit is further arranged in the sensor housing;
the compensation analog-to-digital conversion unit is arranged on the main elastic body and is respectively connected with the compensation Wheatstone bridge and the compensation unit;
the compensation analog-to-digital conversion unit is used for receiving the current weight data output by the compensation Wheatstone bridge and converting the current weight data into digital weight data;
and the compensation analog-to-digital conversion unit is used for sending the weight data of the digital weight to the compensation unit.
Optionally, the compensation analog-to-digital conversion unit includes: the compensation amplifier, the compensation analog-to-digital converter, the compensation microprocessor and the compensation memory are arranged in the circuit board;
the compensation amplifier is respectively connected with the compensation Wheatstone bridge and the compensation analog-to-digital converter, the compensation microprocessor is respectively connected with the compensation analog-to-digital converter and the compensation memory, and the compensation microprocessor is further connected with the compensation unit through a compensation interface.
Optionally, the dual output load cell further comprises: a dual-channel instrument;
wherein the dual channel meter is connected with the compensation unit, and the compensation unit is disposed within the dual channel meter.
In order to achieve the above object, the present invention further provides a method for manufacturing a dual-output weighing sensor, where the method for manufacturing a dual-output weighing sensor includes:
arranging a main elastic body with a main resistance strain gauge, a main analog-digital conversion unit and an auxiliary analog-digital conversion unit on a base;
arranging a compensation sensor with a compensation resistance strain gauge and weights on the base;
parameter debugging is carried out on a main sensor comprising the main elastic body and the compensation sensor through a connected compensation unit;
and packaging the debugged main sensor and the debugged compensation sensor by using a sheath welding part, a top layer membrane and the base to obtain the double-output weighing sensor.
The invention provides a double-output weighing sensor and a manufacturing method thereof, wherein the double-output weighing sensor is characterized in that a compensation sensor is arranged in a main sensor, and the main sensor and the compensation sensor are respectively connected with a compensation unit; the main sensor collects the weight of the load body and sends the collected weight data of the current load body to the compensation unit; the compensation sensor collects the weight of the weight in the current state and sends the collected current weight data of the weight to the compensation unit; and the compensation unit compares the current weight data with the weight data in a static state, and compensates the current load body weight data according to a comparison result to obtain standard load body weight data. In the invention, the compensation sensor is arranged in the main sensor, and the current weight data of the load body is compensated by using the current weight data output by the compensation sensor arranged in the main sensor, so that the accurate weight data of the standard load body is obtained.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below, it is obvious that the drawings in the following description are only some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained according to the structures shown in the drawings without creative efforts.
FIG. 1 is a schematic structural view of a first embodiment of a dual output load cell in accordance with the present invention;
FIG. 2 is a schematic diagram of a hardware configuration of a second embodiment of a dual output load cell in accordance with the present invention;
FIG. 3 is a schematic diagram of a hardware configuration of a compensation sensor in a dual output load cell according to the present invention;
FIG. 4 is a top view of a plate-shaped sheet structure of a compensation sensor in a dual output load cell according to the present invention;
FIG. 5 is a top view of an annular foil structure of a compensation sensor in a dual output load cell according to the present invention;
FIG. 6 is an electrical schematic of the dual output load cell of the present invention;
FIG. 7 is a schematic flow chart of a method of manufacturing a dual-output load cell of the present invention.
The reference numbers illustrate:
the implementation, functional features and advantages of the objects of the present invention will be further explained with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.
It should be noted that all the directional indicators (such as up, down, left, right, front, and rear … …) in the embodiment of the present invention are only used to explain the relative position relationship between the components, the movement situation, etc. in a specific posture (as shown in the drawing), and if the specific posture is changed, the directional indicator is changed accordingly.
In addition, the descriptions related to "first", "second", etc. in the present invention are for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In addition, the technical solutions in the embodiments may be combined with each other, but it must be based on the realization of those skilled in the art, and when the technical solutions are contradictory or cannot be realized, such a combination should be considered to be absent and not within the protection scope of the present invention.
Referring to fig. 1, fig. 1 is a schematic structural view of a dual-output load cell according to a first embodiment of the present invention. A first embodiment of the dual output load cell of the present invention is presented based on fig. 1.
In this embodiment, the dual output load cell includes: a main sensor 1, a compensation sensor 2 and a compensation unit 3;
the compensation sensor 2 is arranged inside the main sensor 1, and the main sensor 1 and the compensation sensor 2 are respectively connected with the compensation unit 3.
It should be understood that the load cell is a very convenient sensor by which the weight of the load body can be directly acquired. However, in some special cases, the weight data collected by the sensor is not accurate, for example, when weighing a load on a ship, the ship body cannot be stabilized due to water flow, and at this time, the weight data obtained by weighing the load is not accurate. In addition, the standard weight data can be obtained in a short time by providing one compensation sensor 2 in the same environment to compensate the collected weight data, however, since the compensation sensor 2 is usually directly provided in the measurement environment, the standard weight object measured by the compensation sensor 2 is affected by the environment, which causes the weight of the object to change, such as rusting or material scattering on the standard weight object, or the standard weight object to have a chemical reaction, etc., at this time, the weight data of the standard weight object measured by the compensation sensor 2 is not accurate, and thus the load weight data cannot be accurately compensated.
The main sensor 1 is a sensor for collecting weight data of the load body. The compensation sensor 2 is a sensor for measuring the weight that a standard-weight object presents in the current state. Standard weight objects in a particular situation, the weight data obtained by weighing is not the same as the standard weight data for the object. For example, in the case of weight measurement on a weighing scale, the weight data measured by a person standing on the weighing scale in a static state is completely different from the weight data measured by a person standing on the weighing scale while crouching and rising. The compensation unit 3 is a unit for compensating the weight data of the load body collected in the current environmental state. The weight data of the load body obtained after compensation by the compensation unit 3 is standard weight data of the load body.
In specific implementation, the main sensor 1 may collect the weight of the load body in the current state, and send the collected weight data of the current load body to the compensation unit 3; the compensation sensor 2 can collect the weight of the weight in the current state and send the collected current weight data of the weight to the compensation unit 3; and the compensation unit 3 compares the current weight data with the weight data in a static state, and compensates the current load body weight data according to a comparison result to obtain standard load body weight data. For example, the compensating unit 3 may determine a difference between the weight data of the weights collected in the static state and the current state through an internal operation, determine a compensation ratio of the current load weight data collected in the current state through a divider between the difference and the current weight data of the weights, and compensate the current load weight data through an amplifier according to the adjustment ratio to obtain the standard load weight data.
The current load weight data is the load weight acquired by the main sensor 1 in the current environmental state. The current weight data is the weight of the weight collected by the compensation sensor 2 in the current environmental state. The standard load body weight data is the actual weight of the load body, i.e., the weight data of the load body in the standard state.
In this embodiment, the dual-output weighing sensor is configured such that the compensation sensor is disposed inside the main sensor, and the main sensor and the compensation sensor are respectively connected to the compensation unit; the main sensor collects the weight of the load body and sends the collected weight data of the current load body to the compensation unit; the compensation sensor collects the weight of the weight in the current state and sends the collected current weight data of the weight to the compensation unit; and the compensation unit compares the current weight data with the weight data in a static state, and compensates the current load body weight data according to a comparison result to obtain standard load body weight data. In this embodiment, accurate standard load body weight data is obtained by disposing the compensation sensor inside the main sensor and compensating the current load body weight data with the current weight data output from the compensation sensor disposed inside the main sensor.
Referring to fig. 2, fig. 2 is a schematic diagram of a hardware structure of a second embodiment of the dual-output load cell according to the present invention. A second embodiment of the dual-output load cell of the present invention is presented based on the first embodiment of the dual-output load cell described above.
In the present embodiment, the main sensor 1 includes: a sensor shell consisting of a base 12, a sheath welding piece 13 and a top membrane 14;
a main elastic body 11 is arranged in the sensor shell, and the main elastic body 11 penetrates through a central hole of the top layer diaphragm 14 and is arranged on the base 12.
It should be noted that the sensor housing formed by the base 12, the sheath weldment 13 and the top diaphragm 14 can seal the relevant components disposed inside the housing. External environmental factors do not affect the environmental state within the housing. The weight arranged in the shell is not influenced by the external environment to cause the weight change. The main elastic body 11 may be used to measure weight data of the load body, and the main elastic body 11 may be elastically deformed according to the weight of the load body prevented at the upper end thereof, the elastic deformation being related according to the weight of the load body. The top membrane 14 is centrally provided with a central hole of a size slightly larger than the diameter of the protruding portion of the main elastic body 11, so as to seal the environment as much as possible without affecting the deformation of the protruding portion of the main elastic body 11. The sensor housing may have a columnar structure or a cubic structure, which is not limited herein.
In the present embodiment, a number of main resistance strain gauges 16 are also provided in the sensor housing;
the main resistance strain gauge 16 is arranged on the strain sensitive part of the main elastic body 11 of the column structure; a certain number of the main resistance strain gauges form a main Wheatstone bridge; the main Wheatstone bridge is connected with the compensation unit.
It should be understood that a resistive strain gauge is a transducer that converts dimensional changes on an engineered component into a change in resistance. In this embodiment, the resistance strain gauge may convert the deformation size of the elastic body into a resistance change. The main resistance strain gauge 16 is a resistance strain gauge for converting the deformation dimension of the main elastic body 11 into a change in resistance value. The main resistance strain gauges 16 with a certain number can form a Wheatstone bridge, when a load body is weighed, the load body can extrude the main elastic body 11, the deformation generated by the main elastic body 11 can directly cause the resistance value of the main resistance strain gauges 16 on the Wheatstone bridge to change, and therefore the weight data of the load body can be determined according to the output result of the main resistance strain gauges.
Note that, in the present embodiment, the main elastic body 11 may have a column structure, and the strain sensitive portion is present on the main elastic body 11. When a load body is present on the main elastic body 11, the size of the strain sensitive portion changes directly according to the weight of the load body. Of course, the main elastic body 11 also has a non-strain sensitive portion, which is not generally changed.
In specific implementation, the weight of the load body can be directly acquired through the main wheatstone bridge, and the acquired current load body weight data is sent to the compensation unit 3 for compensation to obtain standard load body weight data.
In this embodiment, a main analog-to-digital conversion unit 4 is further disposed in the sensor housing;
the main analog-to-digital conversion unit 4 is disposed on the main elastic body 11, and the main analog-to-digital conversion unit 4 is connected to the main wheatstone bridge and the compensation unit 3, respectively.
It should be understood that in the actual weighing process, the collected weight data is usually sent directly in analog form. The weight data displayed by the weight display device is inaccurate due to the fact that the weight display device is easily interfered in the process of transmitting the analog signals. In order to reduce interference in the data transmission process, in this embodiment, the analog-to-digital conversion unit may convert the acquired analog data into digital data, and then transmit the digital data, so that interference in the data transmission process can be effectively reduced. The main analog-to-digital conversion unit 4 is a unit for performing analog-to-digital conversion on the acquired weight data of the load body.
In specific implementation, the main wheatstone bridge may send the acquired current load body weight data to the main analog-to-digital conversion unit 4, and the main analog-to-digital conversion unit 4 converts the current load body weight data into digital load body weight data when receiving the current load body weight data; the digital load mass weight data is then sent to the compensation unit 3 for compensation.
Referring to fig. 6, in this embodiment, the main analog-to-digital conversion unit 4 specifically includes: a main amplifier 41, a main analog-to-digital converter 42, a main microprocessor 43, and a main memory 44;
the main amplifier 41 is connected to the main wheatstone bridge and the main analog-to-digital converter 42, the main microprocessor 13 is connected to the main analog-to-digital converter 42 and the main memory 44, and the main microprocessor 43 is further connected to the compensation unit 3 through a main interface 45.
It should be understood that, when analog-to-digital converting the analog signal, the analog signal may be amplified first, and then the amplified analog signal may be analog-to-digital converted to obtain a digital signal. In the present embodiment, the microprocessor is a unit for controlling data storage and data transmission. In order to prevent the collected data from being lost, a memory can be arranged to store the collected weight data of the load body. The main amplifier 41, the main analog-to-digital converter 42, the main microprocessor 43, and the main memory 44 are units for processing, storing, or transmitting the current load body weight data.
In a specific implementation, in a current state, the current load weight data collected by the main sensor 1 may be amplified by the main amplifier 41, and then subjected to analog-to-digital conversion by the main analog-to-digital converter 42 to obtain digital load weight data. Upon receiving the digital load weight data, the main microprocessor 43 may transmit the digital load weight data to the main memory 45 for storage. The main microprocessor 43 can also send the load weight data in digital form to the compensation unit 3 via a data-sending main interface 45.
Referring to fig. 3 to 5, in the present embodiment, the compensation sensor 2 includes: a certain number of compensation resistance strain gauges 23, a compensation elastic body 22 of a sheet structure, and weights 21;
the compensation elastic body 22 is arranged on the base 12, the weight 21 is arranged at one end of the compensation elastic body 22, and the compensation resistance strain gauges 23 are symmetrically adhered to the front surface and the back surface of the compensation elastic body;
the certain number of compensation resistance strain gauges 23 form a compensation Wheatstone bridge;
wherein the compensation Wheatstone bridge is connected with the compensation unit 3;
it should be understood that a certain number of compensation resistance strain gauges 23 may form a compensation wheatstone bridge, when the weight is weighed, the weight may squeeze the compensation elastic body 21, and the deformation generated by the compensation elastic body 21 may directly cause the resistance value of the compensation resistance strain gauge 23 on the compensation wheatstone bridge to change, so as to determine the weight data in the current state according to the output result of the compensation wheatstone bridge.
The compensation elastic body 23 of the sheet structure may be a straight sheet structure or a circular sheet structure. Also on this compensation elastomer 23 there are strain sensitive and non-strain sensitive parts. The specific structure of the compensation elastic body 22 of the sheet structure is not limited in the present embodiment. The weight may be a columnar structure provided at one end of the compensation elastic body 23.
In specific implementation, the weight of the weight can be directly collected through the compensation wheatstone bridge 23, and the collected current weight data of the weight is sent to the compensation unit 3, so that the compensation unit 3 adjusts the current load weight data according to the current weight data of the weight and the weight in a static state.
In this embodiment, a compensation analog-to-digital conversion unit 5 is further disposed in the sensor housing;
the compensation analog-to-digital conversion unit 5 is disposed on the main elastic body 11, and the compensation analog-to-digital conversion unit 5 is connected to the compensation wheatstone bridge and the compensation unit 3, respectively.
In this embodiment, the compensation analog-to-digital conversion unit 5 is a unit for performing analog-to-digital conversion on the weight data of the collected weight in the current state. In a specific implementation, the compensation analog-to-digital conversion unit 5 may receive current weight data output by the compensation wheatstone bridge, convert the current weight data into digital weight data, and finally send the digital weight data to the compensation unit 3.
In this embodiment, the compensation analog-to-digital conversion unit 5 includes: a compensation amplifier 51, a compensation analog-to-digital converter 52, a compensation microprocessor 53 and a compensation memory 54;
the compensation amplifier 51 is connected to the compensation wheatstone bridge and the compensation analog-to-digital converter 52, the compensation microprocessor 53 is connected to the compensation analog-to-digital converter 52 and the compensation memory 54, and the compensation microprocessor 53 is further connected to the compensation unit through a compensation interface 55.
The compensation amplifier 51, the compensation analog-to-digital converter 52, the compensation microprocessor 53 and the compensation memory 54 are units for processing, storing or transmitting the weight data of the current weight.
In a specific implementation, in a current state, the current weight data collected by the compensation sensor 2 may be amplified by the compensation amplifier 51, and then subjected to analog-to-digital conversion by the compensation analog-to-digital converter 52 to obtain digital weight data. When receiving the digital weight data, the compensation microprocessor 53 may send the digital weight data to the compensation memory 55 for storage. The compensation microprocessor 53 can also transmit the weight data in digital form to the compensation unit 3 via a data-transmitting compensation interface 55.
In this embodiment, the dual output load cell further includes: a dual-channel instrument 8;
wherein the two-channel instrument 8 is connected with the compensation unit 3 and the compensation unit 3 is arranged within the two-channel instrument 8.
It should be noted that the meter is a unit for displaying the collected weight data. In this embodiment, the compensation unit 3 in the dual-channel meter 8 can receive the current load weight data sent by the main sensor 1, and can also receive the current weight data sent by the compensation sensor 2. The compensation unit 3 can simultaneously send the current weight data of the weight of the standard load after compensation to the dual-channel instrument 8 for displaying.
In this embodiment, the dual output load cell further includes: a main regulator 6 and a compensation regulator 7;
the main voltage stabilizer 6 is connected with the main analog-digital conversion unit 4 and the power supply in the dual-channel instrument 8, and the compensation voltage stabilizer 7 is connected with the compensation analog-digital conversion unit 5 and the power supply in the dual-channel instrument 8.
It should be understood that, since the power source needs to be placed in a certain size, in this embodiment, the power source may be directly disposed in the dual-channel meter 8, and then electrically connected with the analog-to-digital conversion unit through the dual-channel meter 8 to supply power to the analog-to-digital conversion unit. The voltage stabilizer is a device for stabilizing the power voltage output by the power supply, and can avoid inaccurate weight data collected due to power voltage fluctuation.
In this embodiment, the main regulator 6 may regulate the power voltage provided by the power supply, and output the regulated power voltage to the main analog-to-digital conversion unit 4 to supply power to the main analog-to-digital conversion unit 4; the compensation voltage stabilizer 8 may stabilize the power voltage provided by the power supply, and output the stabilized power voltage to the compensation analog-to-digital conversion unit 5 to supply power to the compensation analog-to-digital conversion unit 5. Of course, the power supply in this embodiment can also supply power to the main sensor 1 and the compensation sensor 2.
In the embodiment, the compensation sensor is arranged in the main sensor, so that the influence caused by inaccuracy of the compensation sensor is avoided, and the weight data is transmitted through the analog-to-digital conversion module through the formation of the digital signal, so that the accuracy of obtaining the weight data can be further improved.
Referring to fig. 7, fig. 7 is a schematic flow chart of a method for manufacturing a dual-output load cell according to the present invention. In order to achieve the above object, the present invention further provides a method for manufacturing a dual-output weighing sensor, including:
s10: arranging a main elastic body with a main resistance strain gauge, a main analog-digital conversion unit and an auxiliary analog-digital conversion unit on a base;
it should be understood that, because the main elastic body is arranged inside the shell of the main sensor, before the main elastic body is placed into the shell consisting of the base, the top diaphragm and the sheath welding piece, the main resistance strain gauge and the analog-to-digital conversion unit which are required to be arranged on the main elastic body are fixed on the main elastic body in advance, and the main elastic body which can be directly rotated is obtained. After obtaining the main elastic body on which the resistance strain gauges and the analog-to-digital conversion unit are fixed, the main elastic body can be directly arranged on the base, the main Wheatstone bridge formed by the main resistance strain gauges is connected with the main analog-to-digital conversion module, and the analog-to-digital conversion module is electrically connected with the compensation unit and the power supply which are arranged in the dual-channel instrument.
S20: arranging a compensation sensor with a compensation resistance strain gauge and weights on the base;
it should be noted that, when the compensation sensor is arranged, the compensation resistance strain gauge and the corresponding weight need to be arranged on the compensation elastic body in advance to form a complete compensation sensor, then the complete compensation sensor is arranged on the base, a compensation wheatstone bridge formed by the resistance strain gauges in the compensation sensor is connected with the compensation analog-digital conversion module, and then the compensation analog-digital conversion module is electrically connected with the compensation unit and the power supply which are arranged in the dual-channel instrument.
S30: parameter debugging is carried out on a main sensor comprising the main elastic body and the compensation sensor through a connected compensation unit;
it should be understood that after the main sensor and the compensation sensor are set, parameters of the main sensor and the compensation sensor need to be adjusted to determine that the main sensor and the compensation sensor can accurately acquire corresponding weight data. The debugging can comprise temperature compensation debugging of the sensor at different temperatures, elastic body deformation testing of the sensor, resistance change testing of the resistance strain gauge, gravity data sending, storage testing and the like.
S40: and packaging the debugged main sensor and the debugged compensation sensor by using a sheath welding part, a top layer membrane and the base to obtain the double-output weighing sensor.
It should be noted that the main sensor is encapsulated by the sheath weld, the top diaphragm and the base after the main sensor and the compensation sensor are tested. The compensation sensor is directly packaged inside the main sensor, so that when long-time measurement is avoided, the weight measured by the compensation sensor is influenced by the external environment to cause inaccurate measurement.
The embodiment provides a method for manufacturing a double-output weighing sensor, which comprises the steps of arranging a main elastic body with a main resistance strain gauge, a main analog-digital conversion unit and an auxiliary analog-digital conversion unit on a base; arranging a compensation sensor with a compensation resistance strain gauge and weights on the base; parameter debugging is carried out on a main sensor comprising the main elastic body and the compensation sensor through a connected compensation unit; and packaging the debugged main sensor and the debugged compensation sensor by using a sheath welding part, a top layer membrane and the base to obtain the double-output weighing sensor. In this embodiment, the compensation sensor is directly encapsulated inside the main sensor, and the analog-to-digital conversion unit is arranged to transmit gravity data, so that standard weight data of the load body can be acquired more accurately.
In this embodiment, the specific manufacturing method of the dual-output weighing sensor can refer to the specific structure of the dual-output weighing sensor, which is not described herein again.
The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.
Claims (10)
1. A dual-output load cell, comprising: the device comprises a main sensor, a compensation sensor and a compensation unit;
the compensation sensor is arranged in the main sensor, and the main sensor and the compensation sensor are respectively connected with the compensation unit;
the main sensor is used for collecting the weight of the load body and sending the collected weight data of the current load body to the compensation unit;
the compensation sensor is used for collecting the weight of the weight in the current state and sending the collected current weight data of the weight to the compensation unit;
and the compensation unit is used for comparing the current weight data with the weight data in a static state, and compensating the current load weight data according to a comparison result to obtain standard load weight data.
2. The dual output load cell of claim 1, wherein said main sensor comprises: the sensor shell consists of a base, a sheath welding part and a top-layer diaphragm;
the sensor shell is internally provided with a main elastic body, and the main elastic body penetrates through a center hole of the top layer diaphragm and is arranged on the base.
3. The dual output load cell of claim 2, wherein a number of primary resistive strain gauges are also provided within said sensor housing;
the main resistance strain gauge is arranged on a strain sensitive part of the main elastic body of the column type structure;
a certain number of the main resistance strain gauges form a main Wheatstone bridge;
the main Wheatstone bridge is connected with the compensation unit;
and the main Wheatstone bridge is used for collecting the weight of the load body and sending the collected weight data of the current load body to the compensation unit.
4. The dual-output load cell of claim 3, wherein a main analog-to-digital conversion unit is further provided within said sensor housing;
the main analog-digital conversion unit is arranged on the main elastic body, and the main analog-digital conversion unit is respectively connected with the main Wheatstone bridge and the compensation unit;
the main analog-to-digital conversion unit is used for receiving the current load body weight data output by the main Wheatstone bridge and converting the current load body weight data into digital load body weight data;
the main analog-to-digital conversion unit is used for sending the digital load weight data to the compensation unit.
5. The dual-output load cell of claim 4, wherein the main analog-to-digital conversion unit comprises: a main amplifier, a main analog-to-digital converter, a main microprocessor and a main memory;
the main amplifier is respectively connected with the main Wheatstone bridge and the main analog-to-digital converter, the main microprocessor is respectively connected with the main analog-to-digital converter and the main memory, and the main microprocessor is further connected with the compensation unit through a main interface.
6. The dual output load cell of claim 5, wherein said compensation sensor comprises: a certain number of compensation resistance strain gauges, compensation elastic bodies of sheet structures and weights;
the compensation elastic body is arranged on the base, the weights are arranged at one end of the compensation elastic body, and the compensation resistance strain gauges are symmetrically adhered to the front surface and the back surface of the compensation elastic body;
the compensation resistance strain gauges form a compensation Wheatstone bridge;
wherein the compensation Wheatstone bridge is connected with the compensation unit;
and the compensation Wheatstone bridge is used for collecting the weight of the weight and sending the collected weight data of the current weight to the compensation unit.
7. The dual-output load cell of claim 6, wherein a compensation analog-to-digital conversion unit is further disposed within the sensor housing;
the compensation analog-to-digital conversion unit is arranged on the main elastic body and is respectively connected with the compensation Wheatstone bridge and the compensation unit;
the compensation analog-to-digital conversion unit is used for receiving the current weight data output by the compensation Wheatstone bridge and converting the current weight data into digital weight data;
and the compensation analog-to-digital conversion unit is used for sending the weight data of the digital weight to the compensation unit.
8. The dual-output load cell of claim 7, wherein said compensation analog-to-digital conversion unit comprises: the compensation amplifier, the compensation analog-to-digital converter, the compensation microprocessor and the compensation memory are arranged in the circuit board;
the compensation amplifier is respectively connected with the compensation Wheatstone bridge and the compensation analog-to-digital converter, the compensation microprocessor is respectively connected with the compensation analog-to-digital converter and the compensation memory, and the compensation microprocessor is further connected with the compensation unit through a compensation interface.
9. The dual-output load cell of claim 8, further comprising: a dual-channel instrument;
wherein the dual channel meter is connected with the compensation unit, and the compensation unit is disposed within the dual channel meter.
10. A manufacturing method of a dual-output weighing sensor is characterized by comprising the following steps:
arranging a main elastic body with a main resistance strain gauge, a main analog-digital conversion unit and an auxiliary analog-digital conversion unit on a base;
arranging a compensation sensor with a compensation resistance strain gauge and weights on the base;
parameter debugging is carried out on a main sensor comprising the main elastic body and the compensation sensor through a connected compensation unit;
and packaging the debugged main sensor and the debugged compensation sensor by using a sheath welding part, a top layer membrane and the base to obtain the double-output weighing sensor.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210444545.6A CN114812760A (en) | 2022-04-26 | 2022-04-26 | Double-output weighing sensor and manufacturing method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202210444545.6A CN114812760A (en) | 2022-04-26 | 2022-04-26 | Double-output weighing sensor and manufacturing method thereof |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN114812760A true CN114812760A (en) | 2022-07-29 |
Family
ID=82507675
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202210444545.6A Pending CN114812760A (en) | 2022-04-26 | 2022-04-26 | Double-output weighing sensor and manufacturing method thereof |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN114812760A (en) |
-
2022
- 2022-04-26 CN CN202210444545.6A patent/CN114812760A/en active Pending
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5357786A (en) | Device for determining mechanical properties of materials | |
| US7478001B2 (en) | Systems and methods for temperature-compensated measuring of a load | |
| CN204085667U (en) | Electronic scales | |
| CN201653608U (en) | High-intelligent resistance strain gage sensor | |
| GB2041523A (en) | Weighing apparatus | |
| CN109489789A (en) | A kind of scale and method of measurable quadrangle weight value | |
| CN208187598U (en) | Load cell and dynamic assembly suspension force measuring sensors | |
| US7104139B2 (en) | System and method for load sensing using piezoelectric effect | |
| CN217358703U (en) | Double-output weighing sensor | |
| CN114812760A (en) | Double-output weighing sensor and manufacturing method thereof | |
| CN117330239A (en) | Pressure transmitter detection system and method | |
| CN106679777A (en) | Electronic scale temperature compensation device and compensation method thereof | |
| CN115541105A (en) | Digital pressure sensor and calibration, calibration and measurement method thereof | |
| CN218331086U (en) | Drilling fluid density automatic measuring instrument | |
| Dontu | Calibrating a double aluminium bar with electrotensometric strain gauge attached | |
| CN219348052U (en) | Force measuring calibration device | |
| GB2368644A (en) | Tester for applying tensile force to a fixing | |
| CN111323103A (en) | Pressure sensing device for adjusting and calibrating four-corner balance, circuit and electronic weighing instrument | |
| CN221571636U (en) | Bellows type weighing sensor | |
| KR102538936B1 (en) | Electronic scales with imporved precision | |
| CN116046228B (en) | Magnetic particle inspection equipment lifting force measuring device and method based on strain gauge | |
| JPS6039521A (en) | Force measuring device provided with temperature compensation | |
| CN109374101B (en) | Human body scale, circuit and method capable of improving weighing repeatability | |
| JP3621188B2 (en) | Mass measuring device | |
| CN211696753U (en) | Embedded force measuring device of strain sensitive element |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PB01 | Publication | ||
| PB01 | Publication | ||
| SE01 | Entry into force of request for substantive examination | ||
| SE01 | Entry into force of request for substantive examination |