CN210571127U - Tension sensor - Google Patents
Tension sensor Download PDFInfo
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- CN210571127U CN210571127U CN201921186153.4U CN201921186153U CN210571127U CN 210571127 U CN210571127 U CN 210571127U CN 201921186153 U CN201921186153 U CN 201921186153U CN 210571127 U CN210571127 U CN 210571127U
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- 239000003990 capacitor Substances 0.000 claims description 37
- 238000006243 chemical reaction Methods 0.000 claims description 6
- 239000011888 foil Substances 0.000 claims description 2
- 238000005259 measurement Methods 0.000 abstract description 13
- 230000000149 penetrating effect Effects 0.000 abstract description 3
- 230000005484 gravity Effects 0.000 description 8
- 230000035945 sensitivity Effects 0.000 description 5
- 238000004364 calculation method Methods 0.000 description 4
- 238000009434 installation Methods 0.000 description 3
- 238000004519 manufacturing process Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 2
- 238000005457 optimization Methods 0.000 description 2
- 229910000831 Steel Inorganic materials 0.000 description 1
- 230000003321 amplification Effects 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000003199 nucleic acid amplification method Methods 0.000 description 1
- 239000000047 product Substances 0.000 description 1
- 239000010959 steel Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
- 238000004804 winding Methods 0.000 description 1
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Abstract
The utility model discloses a tension sensor and tension sensor, include: the yarn tension sensor comprises a shell, a measuring sheet arranged in the shell, a detecting head connected with one end of the measuring sheet, a hole penetrating through the inside and the outside of the shell and a circuit of a tension sensor, wherein the circuit of the sensor is provided with a strain bridge circuit used for contacting with yarn on the strain sheet and an amplifying circuit linked with the strain bridge circuit; during operation, the yarn produces tension to the detecting head, and tension makes the detecting head push down the measurement piece, and the measurement piece takes place deformation, and the resistance card on the measurement piece correspondingly produces deformation, and the electric current that deformation produced is inputed amplifier circuit, and amplifier circuit filters noise, burr in the electric current effectively, and the rethread amplifier chip is enlargied weak current signal, obtains accurate, pure signal of telecommunication.
Description
Technical Field
The utility model relates to a measurement field, especially a tension sensor.
Background
At present, in the production and processing of some yarns and rope wires, the wires are conveyed from an outgoing line to a wire winding through a multi-stage intermediate shaft to be sorted, in order to prevent the wires from being broken due to overlarge force in the sorting process, sometimes, the finished wire products are not regular enough due to insufficient tension, the conveying speed is low, and the production efficiency is reduced, so that a tension sensor is used for measuring the tension of the wires in real time in the production process, the measurement circuit of the existing tension sensor with a small size mainly uses a half-bridge circuit, the sensitivity is insufficient, the signal interference of an amplifying circuit is large, and the measurement circuit has the problems of inaccurate measurement and large error and cannot truly reflect the real tension of the yarns.
SUMMERY OF THE UTILITY MODEL
In order to solve the above problems, an object of the present invention is to provide a tension sensor, which can accurately and effectively amplify the slight current variation caused by the yarn tension.
The utility model provides a technical scheme that its problem adopted is:
according to the utility model provides a pair of tension sensor, include: the casing, set up and be in the inside measuring piece of casing, with measuring the detecting head that piece one end is connected, run through inside outside hole of casing and setting are in zero setting button on the casing, the detecting head passes through the hole is followed the inside of casing extends to the outside, tension sensor's circuit is arranged in the casing.
According to the utility model provides a pair of tension sensor, the circuit possess the setting with yarn contact foil gage on strain bridge circuit and with the amplifier circuit that the bridge circuit is linked is strained.
According to the utility model provides a pair of tension sensor, strain bridge circuit arranges in measure the both sides of piece.
According to the utility model provides a tension sensor, the strain bridge circuit includes the first chain link end and the second chain link end that link with the amplifier circuit; the amplifying circuit comprises an amplifying chip, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor and a first power supply, wherein the amplifying chip comprises an RG pin, + RG pin, -IN pin, + I N pin, -VS pin and + VS pin, one end of the first resistor is linked with the RG pin, the other end of the first resistor is linked with the + RG pin, one end of the first capacitor is linked to the ground, the other end of the first capacitor is linked with the-I N pin, one end of the second capacitor is linked with the-I N pin, the other end of the second capacitor is linked with the + I N pin, the third capacitor is linked with the + I N pin, the other end of the third capacitor is linked with the ground, the-VS pin is linked with the ground, one end of the second resistor is linked with the-I N pin, the other end of the third resistor is linked to the first link end, one end of the third resistor is linked to the + I N pin, the other end of the third resistor is linked to the second link end, and the + VS pin is linked to the first power supply. One end of the first capacitor is linked to the ground, the other end of the first capacitor is linked to the-I N pin, one end of the second capacitor is linked to the-I N pin, the other end of the second capacitor is linked to the + I N pin, the third capacitor is linked to the + I N pin, and the other end of the third capacitor is linked to the ground.
According to the utility model provides a tension sensor, strain bridge circuit includes second power, fourth resistance, fifth resistance, sixth resistance, seventh resistance, the one end of fourth resistance is linked to the second power, and the other end is linked to the first end that links, the one end of fifth resistance is linked to the first end that links, and the other end is linked to ground, the one end of sixth resistance is linked to the second power, and the other end is linked to the second end that links, the one end of seventh resistance is linked to the second end that links, and the other end is linked to ground; compared with a half-bridge circuit, the sensitivity of the full bridge is doubled, the impedance of the bridge circuit is improved, the power consumption of the bridge circuit is reduced, and the integral current consumption of the sensor is less than or equal to 20 mA.
According to the present invention, the fourth resistor, the fifth resistor, the sixth resistor and the seventh resistor have the same resistance value; the four resistance values of the full-bridge circuit are the same, so that the numerical calculation is effectively simplified, and the calculation efficiency is improved.
According to the utility model provides a pair of tension sensor still includes AD converting circuit, it still includes the OUT pin to amplify the chip, the OUT pin with AD converting circuit links, and the analog signal of telecommunication after low direct current skew, low drift, low noise, high open-loop gain, big common mode rejection ratio, high input impedance's amplifying circuit enlargies converts digital signal into through AD converting circuit.
According to the utility model provides a tension sensor, still include the CPU module that is used for adjusting the data error, CPU module with AD converting circuit links; the digital signal is amplified by software regulation through a CPU module, and is digitally filtered by software, so that interference signals are reduced, and output signals are clean and stable.
According to the utility model provides a pair of tension sensor, zero setting button with the CPU module is connected.
According to the utility model provides a tension sensor, still include DA converting circuit, DA converting circuit with the CPU module is linked; according to the requirement of the output signal of the client, a DA conversion circuit can be added, and finally, the amplified pure analog electric signal is output.
According to the utility model provides a pair of tension sensor, it still includes the REF pin to amplify the chip, the REF pin links to ground, effectively accomplishes zero offset output.
Drawings
The present invention will be further explained with reference to the drawings and examples.
Fig. 1 is a perspective view of an embodiment of a tension sensor of the present invention;
fig. 2 is a cross-sectional view of an embodiment of a tension sensor of the present invention;
fig. 3 is a circuit diagram of an embodiment of a tension sensor of the present invention;
fig. 4 is a schematic block diagram of an embodiment of the tension sensor of the present invention.
Detailed Description
This section will describe in detail the embodiments of the present invention, preferred embodiments of the present invention are shown in the attached drawings, which are used to supplement the description of the text part of the specification with figures, so that one can intuitively and vividly understand each technical feature and the whole technical solution of the present invention, but they cannot be understood as the limitation of the protection scope of the present invention.
In the description of the present invention, it should be understood that the orientation or positional relationship indicated with respect to the orientation description, such as up, down, front, rear, left, right, etc., is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, and does not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention.
In the description of the present invention, a plurality of means are one or more, a plurality of means are two or more, and the terms greater than, less than, exceeding, etc. are understood as not including the number, and the terms greater than, less than, within, etc. are understood as including the number. If the first and second are described for the purpose of distinguishing technical features, they are not to be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated or implicitly indicating the precedence of the technical features indicated.
In the description of the present invention, unless there is an explicit limitation, the words such as setting, installation, connection, etc. should be understood in a broad sense, and those skilled in the art can reasonably determine the specific meanings of the above words in combination with the specific contents of the technical solution.
Referring to fig. 1-2, the present invention provides a tension sensor, including a housing 50, a measuring sheet 20 disposed inside the housing 50 and used for receiving a stress carrier of yarn tension, a detecting head 30 connected to one end of the measuring sheet 20 and a hole 40 penetrating through the inside and outside of the housing 50, the detecting head extends from the inside of the housing 50 to the outside through the hole 40, a circuit 10 of the tension sensor is disposed inside the housing 50, the measuring sheet 20 is provided with a strain bridge circuit, the circuit 10 of the tension sensor includes an amplifying circuit for amplifying a measuring signal transmitted by the measuring sheet 20, an AD conversion circuit for converting an amplified analog signal, a CPU module for adjusting data error and a DA conversion circuit for converting a digital signal into an analog signal.
Compared with the traditional tension sensor, the tension sensor has small volume and higher output signal precision through optimizing and improving the strain bridge circuit, the amplifying circuit and the CPU module, and the technical core of the optimization is as follows:
1. the strain bridge circuit that uses on traditional, the thin measurement piece on the tiny tension sensor of volume is half-bridge circuit, and the utility model provides a pair of tension sensor, only dispose the full-bridge circuit on the measurement piece that the area is for several square millimeters, thickness are less than 1 millimeter, and the half-bridge circuit is compared to the full-bridge circuit, and its sensitivity has improved one time, simultaneously, improves the impedance of full-bridge circuit kilo ohm's rank, reduces the power consumptive of full-bridge circuit, and the whole current consumption of sensor is less than 20 mA.
2. Because the area of measuring the piece is smaller, only has several millivolts of zero point in the direct current bias voltage of straining bridge circuit output, the utility model provides a pair of tension sensor has adopted low direct current skew, low drift, low noise, high open loop gain, big common mode rejection ratio, high input impedance's amplifier circuit, improves the accuracy nature and the stability of tension sensor received signal when reducing circuit electronic components number, because measuring circuit's optimization for the tension sensor volume can be done littleer.
3. Because the tension of yarn and the weak of signal, in order to improve measurement accuracy, must eliminate the gravity influence of measurement piece self, the utility model provides a pair of tension sensor sets up the CPU module, mainly solves four big problems: (1) adjusting the zero position of the tension sensor according to the difference of the gravity borne by the measuring sheet 20 according to the different installation directions of the tension sensor, and correcting the zero position through an algorithm in a CPU module; (2) further adjusting the amplification factor of the signal by using software in the CPU module; (3) the amplified signals are digitally filtered by using software, so that the influence of interference signals is further reduced, and the output digital signals are clean and stable; (4) if the customer needs to obtain the digital signal output, the clean and stable digital signal can be directly output through the CPU module.
4. Because the customer of part needs to read analog signal output, so the utility model provides a pair of tension sensor can install the DA circuit additional behind the CPU module according to the customer to the demand of signal, satisfies the customer to analog signal's output demand.
Referring to fig. 1-2, an embodiment of the present invention provides a tension sensor according to the present invention, including: the tension sensor comprises a shell 50, a measuring sheet 20 arranged in the shell, a detecting head 30 connected with one end of the measuring sheet, a hole 40 penetrating through the inside and the outside of the shell 50 and a zero setting button 60 arranged on the shell 50, wherein the detecting head 30 extends from the inside of the shell 50 to the outside through the hole 40, and a circuit 10 of the tension sensor is arranged in the shell 50.
Referring to fig. 3-4, according to the present invention, the circuit 10 has a strain bridge circuit disposed on a strain gauge contacting with the yarn and an amplifying circuit linked with the strain bridge circuit.
According to the utility model provides a tension sensor, the strain bridge circuit includes the first chain link end and the second chain link end that link with the amplifier circuit; the amplifying circuit includes an amplifying chip, a first resistor R1, a second resistor R2, a third resistor R3, a first capacitor C1, a second capacitor C2, a third capacitor C3 and a first power supply V1, the amplifying chip includes an-RG pin, a + RG pin, a-I N pin, a + I N pin, a-VS pin and a + VS pin, one end of the first resistor R1 is linked with the-RG pin, the other end is linked with the + RG pin, one end of the first capacitor C1 is linked to ground, the other end is linked with the-I N pin, one end of the second capacitor C2 is linked with the-I N pin, the other end is linked with the + I N pin, the other end of the third capacitor C3 is linked with the + I N pin, the other end is linked with ground, the-VS pin is linked with ground, one end of the second resistor R2 is linked with the-I N pin, the other end is linked to the first link end, one end of the third resistor R3 is linked to the + I N pin, the other end is linked to the second link end, and the + VS pin is linked to the first power supply V1. One end of the first capacitor is linked to the ground, the other end of the first capacitor is linked to the-I N pin, one end of the second capacitor is linked to the-I N pin, the other end of the second capacitor is linked to the + I N pin, the third capacitor is linked to the + I N pin, and the other end of the third capacitor is linked to the ground.
According to the utility model provides a tension sensor, strain bridge circuit includes second power V2, fourth resistance R4, fifth resistance R5, sixth resistance R6, seventh resistance R7, fourth resistance R4's one end is linked to second power V2, the other end is linked to the first end of linking, fifth resistance R5's one end is linked to the first end of linking, the other end is linked to ground, sixth resistance R6's one end is linked to second power V2, the other end is linked to the second end of linking, seventh resistance R7's one end is linked to the second end of linking, the other end is linked to ground; compared with a half-bridge circuit, the sensitivity of the full bridge is doubled, the impedance of the bridge circuit is improved, the power consumption of the bridge circuit is reduced, and the integral current consumption of the sensor is less than or equal to 20 mA.
According to the present invention, the fourth resistor R4, the fifth resistor R5, the sixth resistor R6 and the seventh resistor R7 have the same resistance value; the four resistance values of the full-bridge circuit are the same, so that the numerical calculation is effectively simplified, and the calculation efficiency is improved.
An embodiment of the utility model provides a tension sensor, fourth resistance R4, fifth resistance R5, the both sides of measuring the piece are arranged in to two bisymmetry of sixth resistance R6 and seventh resistance R7, use the full-bridge circuit mode to paste four resistance cards on measuring piece 20, four resistance cards are puted up on measuring piece about each slice or each slice from top to bottom, the position that the resistance card was puted up is close to the stiff end, make the resistance card be in the biggest position of measuring 20 deformation, effectively improve current output's absolute value, effectively improve sensitivity.
An embodiment of the present invention provides a tension sensor, and the material of the measuring piece 20 is preferably steel.
According to the utility model provides a pair of tension sensor still includes AD converting circuit, it still includes the OUT pin to amplify the chip, the OUT pin with AD converting circuit links, and the analog signal of telecommunication after low direct current skew, low drift, low noise, high open-loop gain, big common mode rejection ratio, high input impedance's amplifying circuit enlargies converts digital signal into through AD converting circuit.
According to the utility model provides a tension sensor, still include the CPU module that is used for adjusting the data error, CPU module with AD converting circuit links; the digital signal is amplified by software regulation through a CPU module, and is digitally filtered by software, so that interference signals are reduced, and output signals are clean and stable.
According to the tension sensor provided by the utility model, the zero setting button 60 is connected with the CPU module; according to different installation directions of the tension sensors and different gravitational forces on the measuring sheet 20, the zero position of the tension sensor is adjusted and corrected through an algorithm in the CPU module.
The CPU module performs zero adjustment on the gravity of the detecting head and the measuring sheet through software according to different placing directions of the tension sensor when in use, eliminates the influence of the gravity of the detecting head and the measuring sheet on measured tension data, and performs zero resetting by adding the initial value in the current state before measurement and the gravity values of the detecting head and the measuring sheet if the downward gravity of the detecting head and the measuring sheet is opposite to the upward yarn tension when the detecting head faces the ground; if the detecting head is towards the direction opposite to the ground, the downward gravity of the detecting head and the measuring sheet is the same as the upward yarn tension direction, and the gravity values of the detecting head and the measuring sheet are subtracted from the initial value in the current state before measurement to return to zero.
According to the utility model provides a tension sensor, still include DA converting circuit, DA converting circuit with the CPU module is linked; according to the requirement of the output signal of the client, a DA conversion circuit can be added, and finally, the amplified pure analog electric signal is output.
According to the utility model provides a pair of tension sensor, it still includes the REF pin to amplify the chip, the REF pin links to ground, effectively accomplishes zero offset output.
Above, only the preferred embodiment of the present invention has been described, the present invention is not limited to the above embodiment, and the technical effects of the present invention can be achieved by the same means, which all belong to the protection scope of the present invention.
Claims (10)
1. A tension sensor, comprising: including the casing, set up and be in the inside measuring piece of casing, with measuring the detecting head that piece one end is connected, run through inside outside hole of casing and setting are in zero setting button on the casing, the detecting head passes through the hole is followed the inside of casing extends to the outside, tension sensor's circuit is arranged in the casing.
2. A tension sensor as in claim 1, wherein: the circuit is provided with a strain bridge circuit arranged on a strain foil contacted with the yarn and an amplifying circuit linked with the strain bridge circuit.
3. A tension sensor as claimed in claim 2, wherein: the strain bridge circuit is arranged on two sides of the measuring sheet.
4. A tension sensor as claimed in claim 2, wherein: the strain bridge circuit comprises a first linking end and a second linking end which are linked with the amplifying circuit; the amplifying circuit comprises an amplifying chip, a first resistor, a second resistor, a third resistor, a first capacitor, a second capacitor, a third capacitor and a first power supply, wherein the amplifying chip comprises an RG pin, a + RG pin, an IN pin, a + IN pin, a-VS pin and a + VS pin, one end of the first resistor is linked with the RG pin, the other end of the first resistor is linked with the + RG pin, one end of the first capacitor is linked with the ground, the other end of the first capacitor is linked with the-IN pin, one end of the second capacitor is linked with the-IN pin, the other end of the second capacitor is linked with the + IN pin, the third capacitor is linked with the + IN pin, the other end of the third capacitor is linked with the ground, one end of the second resistor is linked with the-IN pin, and the other end of the second capacitor is linked with the first link end, one end of the third resistor is linked to the + IN pin, the other end of the third resistor is linked to the second link end, and the + VS pin is linked to the first power supply.
5. A tension sensor as claimed in claim 4, wherein: the strain bridge circuit comprises a second power supply, a fourth resistor, a fifth resistor, a sixth resistor and a seventh resistor, one end of the fourth resistor is linked to the second power supply, the other end of the fourth resistor is linked to the first linking end, one end of the fifth resistor is linked to the first linking end, the other end of the fifth resistor is linked to the ground, one end of the sixth resistor is linked to the second power supply, the other end of the sixth resistor is linked to the second linking end, one end of the seventh resistor is linked to the second linking end, and the other end of the seventh resistor is linked to the ground.
6. A tension sensor as claimed in claim 5, wherein: the fourth resistor, the fifth resistor, the sixth resistor and the seventh resistor have the same resistance value.
7. A tension sensor as claimed in claim 4, wherein: still include AD converting circuit, the amplifier chip still includes the OUT pin, the OUT pin with AD converting circuit links.
8. A tension sensor as in claim 7, wherein: the data error adjusting circuit further comprises a CPU module used for adjusting data errors, and the CPU module is connected with the AD conversion circuit.
9. A tension sensor as recited in claim 8, wherein: the zero setting button is connected with the CPU module.
10. A tension sensor as recited in claim 8, wherein: the CPU module also comprises a DA conversion circuit which is linked with the CPU module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921186153.4U CN210571127U (en) | 2019-07-25 | 2019-07-25 | Tension sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201921186153.4U CN210571127U (en) | 2019-07-25 | 2019-07-25 | Tension sensor |
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| Publication Number | Publication Date |
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| CN210571127U true CN210571127U (en) | 2020-05-19 |
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| CN201921186153.4U Active CN210571127U (en) | 2019-07-25 | 2019-07-25 | Tension sensor |
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| CN (1) | CN210571127U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955585A (en) * | 2021-12-04 | 2022-01-21 | 广东溢达纺织有限公司 | Yarn tension sensor protector and winding device |
-
2019
- 2019-07-25 CN CN201921186153.4U patent/CN210571127U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113955585A (en) * | 2021-12-04 | 2022-01-21 | 广东溢达纺织有限公司 | Yarn tension sensor protector and winding device |
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Effective date of registration: 20240330 Address after: No. 323 Xiawan Road, Gongbei, Zhuhai City, Guangdong Province, 519000, No. 180 Qianhe Road Patentee after: ZHUHAI MIAOSI PRECISION INSTRUMENT CO.,LTD. Country or region after: China Address before: No. 35 Guangcang Road, Baodi Plastic Products Industrial Zone, Baodi District, Tianjin, 301822 Patentee before: Tianjin jinmiaosi Precision Instrument Co.,Ltd. Country or region before: China |