CN213579661U - Weighing sensor - Google Patents
Weighing sensor Download PDFInfo
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- CN213579661U CN213579661U CN202021966486.1U CN202021966486U CN213579661U CN 213579661 U CN213579661 U CN 213579661U CN 202021966486 U CN202021966486 U CN 202021966486U CN 213579661 U CN213579661 U CN 213579661U
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Abstract
The utility model provides a weighing sensor, it includes elastomer, foil gage, control circuit board and signal processing circuit board, one side of elastomer is provided with the recess, control circuit board and signal processing circuit board encapsulation are in the recess, the foil gage with the bridge circuit is constituteed to the signal processing circuit board, control circuit board and signal processing circuit board electricity are connected. The utility model provides a weighing sensor seals control circuit board and signal processing circuit board in the recess through the grooving in the elastomer, reducible weighing sensor's occupation space and simplify weighing sensor's line design.
Description
Technical Field
The utility model belongs to the technical field of the technique of weighing-appliance and specifically relates to relate to weighing sensor.
Background
In recent years, the popularity of the unmanned supermarket is increased, and the commodities sold in the unmanned supermarket are developed from the commodities which are sealed and packaged, such as bottled beverages, snacks and the like, to the commodities which are weighed and fresh at present. The fresh goods are sold by weighing, and the fresh goods have the advantages that each goods, such as fruits or vegetables, can be selected by a consumer, and the number of the purchased goods can be actually determined by the consumer. However, the difficulty of weighing and selling fresh commodities lies in how to weigh, the weighing accuracy and how to settle accounts. At present, most of the fresh commodities are classified, weighing equipment is placed under a goods shelf, and price settlement is carried out according to weight change. The weighing equipment adopts the resistance strain type weight sensor at most, but the control module of the current weight sensor is arranged outside the elastic body, which occupies space and complicates the circuit arrangement.
It is therefore desirable to provide a load cell that is simple in construction and reliable in performance.
SUMMERY OF THE UTILITY MODEL
Based on this, it is necessary to provide a weighing sensor with simple structure and reliable performance.
The utility model provides a weighing sensor, it includes elastomer, foil gage, control circuit board and signal processing circuit board, one side of elastomer is provided with the recess, control circuit board and signal processing circuit board encapsulation are in the recess, the foil gage with the bridge circuit is constituteed to the signal processing circuit board, control circuit board and signal processing circuit board electricity are connected. The control circuit board and the signal processing circuit board are packaged in the elastic body, so that the occupied space of the weighing sensor can be reduced, the circuit arrangement is also reduced, and the structure of the weighing equipment is simplified.
Preferably, the upper and lower both sides of elastomer are provided with the weighing platform, the foil gage laminating the weighing platform and fixed connection. The upper side and the lower side are opposite to the side face of the weighing sensor connected with the external equipment, the upper side is connected with the external weighing frame, and the lower side is connected with the external base. The resistance value of the strain gauge changes along with the deformation of the strain gauge, the strain gauge is designed into a bridge circuit, and the change of voltage can be measured according to the change of the resistance value, so that the change of weight can be measured.
Preferably, the signal processing circuit board processes a voltage signal of which the resistance value of the strain gauge changes, and the signal processing circuit board converts the voltage signal into an analog signal and sends the analog signal to the control circuit board.
Preferably, the control circuit board converts the analog signal into a digital signal and transmits the digital signal to an external display for displaying.
Preferably, the control circuit board comprises a power supply processor, an A/D converter and a memory, the power supply processor and the A/D converter are electrically connected with the signal processing circuit board, and the A/D converter processes signal data sent by the signal processing circuit board. The a/D converter is an analog-to-digital converter for converting an analog signal into a digital signal. The weight change can be quantified by the a/D converter as a number displayed on an external display.
Preferably, the groove extends inwards from the side surface of the elastic body to form a cavity, the control circuit board and the signal processing circuit board are packaged in the cavity, a sealing plate is arranged at a first opening of the cavity, and the sealing plate is fixedly connected with the groove.
Preferably, the groove extends inwards from the side surface of the elastic body and penetrates through the elastic body to form a channel, the control circuit board and the signal processing circuit board are packaged in the channel, sealing plates are arranged at openings at two ends of the channel, and the sealing plates are fixedly connected with the groove.
Further preferably, the sealing plate is provided with a power supply hole penetrating through the sealing plate, and the power supply data line is connected with the control circuit board and the signal processing circuit board through the power supply hole.
Preferably, the elastic body further comprises fixing holes, the fixing holes are arranged at two ends of the elastic body, and the direction of the fixing holes extending into the elastic body is perpendicular to the strain gauge.
The utility model provides a weighing sensor seals control circuit board and signal processing circuit board in the recess through the grooving in the elastomer, reducible weighing sensor's occupation space and simplify weighing sensor's line design.
Drawings
The foregoing and other objects, features and advantages of the invention will be apparent from the following more particular description of preferred embodiments of the invention, as illustrated in the accompanying drawings. Like reference numerals refer to like parts throughout the drawings, and the drawings are not intended to be drawn to scale in actual dimensions, emphasis instead being placed upon illustrating the principles of the invention.
Fig. 1 is a schematic structural diagram of a weighing sensor provided by an embodiment of the present invention.
Fig. 2 is a schematic view of an implementation state of the weighing sensor provided by the embodiment of the present invention.
Detailed Description
To facilitate an understanding of the present invention, the present invention will now be described more fully with reference to the accompanying drawings.
It will be understood that when an element is referred to as being "connected" to another element, it can be directly connected to the other element and be integral therewith, or intervening elements may also be present. The terms "mounted," "one end," "the other end," and the like are used herein for illustrative purposes only.
Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.
Referring to fig. 1-2, an embodiment of the present invention provides a weighing sensor 10, which includes an elastic body 1, a strain gauge 2, a control circuit board (not specifically identified in the drawings) and a signal processing circuit board (not specifically identified in the drawings), wherein a groove 3 is disposed on one side of the elastic body 1, the groove 3 extends into the elastic body 1 to form a cavity, the control circuit board and the signal processing circuit board are packaged in the groove 3, the strain gauge 2 and the signal processing circuit board form an electrical bridge circuit, and the control circuit board is electrically connected to the signal processing circuit board. In the embodiment, the load cell 10 is fixed on the base 7 and a shelf frame or a tray is placed on the load cell 10, when a commodity is placed on the shelf frame or the tray, the resistance value of the strain gauge 2 on the load cell 10 changes after deformation, so that the voltage changes, the control circuit board and the signal processing circuit board convert the signal data of the voltage change into digital signals and output the digital signals to an external display (not specifically identified in the figure), and the change of the weight on the load cell 10 can be measured. The control circuit board and the signal processing circuit board are packaged in the elastic body 1, so that the occupied space of the weighing sensor 10 can be reduced, the circuit arrangement is reduced, and the structure of the weighing equipment is simplified.
Referring to fig. 1, in a preferred embodiment, weighing platforms are disposed on upper and lower sides of the elastic body 1, the weighing platforms are platforms sinking into the elastic body 1 from upper and lower sides of the elastic body 1, and the strain gauges 2 are attached to the weighing platforms and fixedly connected. The upper and lower sides are the upper side connected to the external weighing frame and the lower side connected to the external base 7, with respect to the side where the load cell 10 is connected to the external device. The resistance value of the strain gauge 2 changes along with the deformation, and the strain gauge 2 is designed into a bridge circuit, so that the change of voltage can be measured according to the change of the resistance value, and the change of weight can be measured.
In a preferred embodiment, the signal processing circuit board processes a voltage signal of the strain gauge 2 with a changed resistance value, and the signal processing circuit board converts the voltage signal into an analog signal and sends the analog signal to the control circuit board.
In a preferred embodiment, the control circuit board converts the analog signal to a digital signal and transmits the digital signal to an external display for display.
In a preferred embodiment, the control circuit board comprises a power supply processor, an A/D converter and a memory (not specifically identified in the figure), the power supply processor and the A/D converter are electrically connected with the signal processing circuit board, and the A/D converter processes signal data sent by the signal processing circuit board. The a/D converter is an analog-to-digital converter for converting an analog signal into a digital signal. The weight change can be quantified by an a/D converter, in particular as a number, which is displayed on an external display.
Referring to fig. 1, in a preferred embodiment, a groove 3 extends inwards from a side surface of an elastic body 1 to form a cavity, a control circuit board and a signal processing circuit board are encapsulated in the cavity, a sealing plate 4 is arranged at a first opening of the cavity, and the sealing plate 4 is fixedly connected with the groove 3. Thereby can prevent that vapor from corroding to the recess 3 in to cause the damage to circuit board and components and parts after closing plate 4 and recess 3 fixed connection.
Referring to fig. 1, in a preferred embodiment, a groove 3 extends inward from a side surface of an elastic body 1 and penetrates through the elastic body 1 to form a channel, a control circuit board and a signal processing circuit board are packaged in the channel, sealing plates 4 are arranged at openings at two ends of the channel, and the sealing plates 4 are fixedly connected with the groove 3. The provision of the recess 3 as a passage through the elastomer 1 facilitates the packaging and routing of the control circuit board and the signal processing circuit board.
Referring to fig. 1-2, in a further preferred embodiment, the sealing plate 4 is provided with a power hole 5 penetrating through the sealing plate 4, and the power data line 8 is connected to the control circuit board and the signal processing circuit board through the power hole 5. The power supply data line 8 is used to supply power to the load cell 10 and to transmit electronic signals into the external display.
Referring to fig. 1-2, in a preferred embodiment, the elastic body 1 further includes fixing holes 6, the fixing holes 6 are disposed at two ends of the elastic body 1, and a direction in which the fixing holes 6 extend into the elastic body 1 is perpendicular to the strain gauge 2. The fixing holes 6 can be threaded holes for mounting the weighing sensor 10, the weighing sensor 10 can be fixed on a base 7 of the weighing device, and a tray or a shelf frame to be weighed can also be mounted on the weighing sensor 10.
The utility model provides a weighing sensor 10 is through the grooving in elastomer 1 and with control circuit board and signal processing circuit board sealed in recess 3, reducible weighing sensor 10 occupy space and simplify weighing sensor 10's line design.
The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.
The above-mentioned embodiments only express the specific embodiments of the utility model, and the description thereof is specific and detailed, but not construed as limiting the scope of the utility model. It should be noted that, for those skilled in the art, without departing from the spirit of the present invention, several variations and modifications can be made, which are within the scope of the present invention. Therefore, the protection scope of the present invention should be subject to the appended claims.
Claims (9)
1. The weighing sensor is characterized by comprising an elastic body, a strain gauge, a control circuit board and a signal processing circuit board, wherein a groove is formed in one side of the elastic body, the control circuit board and the signal processing circuit board are packaged in the groove, the strain gauge and the signal processing circuit board form a bridge circuit, and the control circuit board is electrically connected with the signal processing circuit board.
2. The weighing sensor of claim 1, wherein the elastic body is provided with a platform on upper and lower sides thereof, and the strain gauge is attached to and fixedly connected with the platform.
3. The load cell of claim 1, wherein the signal processing circuit board processes a voltage signal of the strain gage having a change in resistance, the signal processing circuit board converting the voltage signal into an analog signal and transmitting the analog signal to the control circuit board.
4. The load cell of claim 3, wherein the control circuit board converts the analog signal to a digital signal and transmits the digital signal to an external display for display.
5. The load cell of claim 1, wherein the control circuit board includes a power processor, an a/D converter and a memory, the power processor and a/D converter being electrically connected to the signal processing circuit board, the a/D converter processing signal data transmitted by the signal processing circuit board.
6. The load cell of claim 1, wherein the recess extends inwardly from a side of the elastomer to form a cavity, the control circuit board and the signal processing circuit board being enclosed within the cavity, a sealing plate being disposed at the first opening of the cavity, the sealing plate being fixedly attached to the recess.
7. The load cell of claim 1, wherein the recess extends inwardly from a side of the body and forms a channel through the body, the control circuit board and the signal processing circuit board being enclosed within the channel, the opening at each end of the channel being provided with a sealing plate, the sealing plates being fixedly attached to the recess.
8. The load cell according to claim 6 or claim 7, wherein the sealing plate is provided with a power supply hole penetrating through the sealing plate, and a power supply data line is connected to the control circuit board and the signal processing circuit board through the power supply hole.
9. The load cell of claim 1, wherein the elastomer further comprises fixing holes, the fixing holes are disposed at two ends of the elastomer, and the direction in which the fixing holes extend into the elastomer is perpendicular to the strain gauge.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021966486.1U CN213579661U (en) | 2020-09-09 | 2020-09-09 | Weighing sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202021966486.1U CN213579661U (en) | 2020-09-09 | 2020-09-09 | Weighing sensor |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN213579661U true CN213579661U (en) | 2021-06-29 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202021966486.1U Active CN213579661U (en) | 2020-09-09 | 2020-09-09 | Weighing sensor |
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| Country | Link |
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| CN (1) | CN213579661U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114636490A (en) * | 2022-03-24 | 2022-06-17 | 速通电气(苏州)有限公司 | Matching method of strain sensor and signal processing device and force sensor |
-
2020
- 2020-09-09 CN CN202021966486.1U patent/CN213579661U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114636490A (en) * | 2022-03-24 | 2022-06-17 | 速通电气(苏州)有限公司 | Matching method of strain sensor and signal processing device and force sensor |
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