CN214333890U - Pressure-torsion composite force sensor with digital signal output - Google Patents
Pressure-torsion composite force sensor with digital signal output Download PDFInfo
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- CN214333890U CN214333890U CN202120714485.6U CN202120714485U CN214333890U CN 214333890 U CN214333890 U CN 214333890U CN 202120714485 U CN202120714485 U CN 202120714485U CN 214333890 U CN214333890 U CN 214333890U
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- torsion
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Abstract
The utility model discloses a take digital signal output's pressure to turn round compound force sensor, including the shell, set up elastomer and inside cavity in the shell, install the signal processing circuit board in inside cavity, and set up the atress piece on the shell, the atress piece is connected with the elastomer, the signal processing circuit board is exported after converting pressure and torsional mV level voltage signal into corresponding digital signal, can guarantee the measuring precision, can improve output signal's interference killing feature again, realize the remote transmission that the compound force sensor output signal was turned round to the pressure.
Description
Technical Field
The utility model relates to a sensor field specifically is a take digital signal output's pressure to turn round compound force transducer.
Background
The pressure-torsion composite force sensor is a composite force sensor capable of measuring pressure and torsion simultaneously, and is mainly used for automatic production equipment such as mechanical arms and industrial robots. At present, the pressure-torsion composite force sensor can only output mV level voltage signals, is easily interfered in an industrial environment, reduces the detection accuracy, and further has adverse effects on the processing precision and the yield of automatic production equipment.
At present, two methods are mainly used for signal processing of the pressure-torsion composite force sensor, one method is to directly connect the mV voltage signal into a control instrument, and the method has the defects that the distance between the sensor and the instrument is long, so that the mV voltage signal is easily interfered by the external environment in the transmission process, and the detection precision is reduced; the other mode is that an external transmitter is connected between the sensor and the control instrument, and the mV level voltage signal is converted into a standard signal and then output to the control instrument, so that the method has the advantages of strong anti-interference capability, but has the defect that a transmitter box needs to be hung externally, the transmitter box is difficult to fix on a mechanical arm moving at a high speed, and continuous large-amplitude shaking easily causes the looseness of an internal circuit board and electronic components of the transmitter box, so that the reliability is reduced.
SUMMERY OF THE UTILITY MODEL
The to-be-solved technical problem of the utility model is to provide a take digital signal output's pressure to turn round compound force sensor, can convert pressure and torsional mV level voltage signal to the digital signal back output that corresponds, can guarantee the measuring precision, can improve output signal's interference killing feature again, realize the pressure and turn round compound force sensor output signal's remote transmission.
The technical scheme of the utility model is that:
a pressure-torsion composite force sensor with digital signal output comprises a shell, an elastic body and an internal cavity which are arranged in the shell, a signal processing circuit board arranged in the internal cavity, and a stressed piece arranged on the shell, the stress piece is connected with the elastic body, the signal processing circuit board is provided with a single chip microcomputer U2, a pressure signal AD conversion chip U1, a torsion signal AD conversion chip U3 and an RS485 level conversion chip U5, the analog signal input end of the pressure signal AD conversion chip U1 and the analog signal input end of the torsion signal AD conversion chip U3 are connected with the elastic body, the digital signal output end of the AD conversion chip U1 and the digital signal output end of the torsion signal AD conversion chip U3 are connected with the corresponding ports of the single chip microcomputer U2 respectively, the signal input end of the RS485 level conversion chip U5 is connected with the corresponding port of the single chip microcomputer U2, and the signal output end of the RS485 level conversion chip U5 is connected with the RS485 bus.
The analog signal input end of the pressure signal AD conversion chip U1 and the analog signal input end of the torsion signal AD conversion chip U3 are respectively connected with the elastic body through corresponding internal cables.
The pressure signal AD conversion chip U1 and the torsion signal AD conversion chip U3 are both TM1237 AD conversion chips.
The single chip microcomputer U2 is of STC11F series.
The RS485 level conversion chip U5 is a 485 level conversion chip with the model number of SP 3485.
The inner end of the RS485 bus is connected with the signal output end of the RS485 level conversion chip U5, and the outer end of the RS485 bus is led out of the shell.
The utility model has the advantages that:
the utility model can output pressure and torsion digital signals simultaneously, and has long transmission distance and strong anti-interference capability; and no external transmitter is needed, the installation is simple and convenient, and the stability and the reliability of long-term operation are higher.
Drawings
Fig. 1 is a schematic structural diagram of the present invention.
Fig. 2 is a circuit diagram of the pressure signal AD conversion chip U1 of the present invention.
Fig. 3 is a circuit diagram of the torque signal AD conversion chip U3 of the present invention.
Fig. 4 is a circuit diagram of the single chip microcomputer U2 of the present invention.
Fig. 5 is a circuit diagram of the RS485 level conversion chip U5 of the present invention.
Detailed Description
The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
Referring to fig. 1, the pressure-torsion composite force sensor with digital signal output comprises a shell 1, an elastic body 2 and an internal cavity 3 which are arranged in the shell 1, a signal processing circuit board 4 which is arranged in the internal cavity 3, and a stress piece 5 which is arranged on the shell 1, wherein the stress piece 5 is connected with the elastic body 2.
Referring to fig. 2-5, a single chip microcomputer U2, a pressure signal AD conversion chip U1, a torsion signal AD conversion chip U3 and an RS485 level conversion chip U5 are disposed on the signal processing circuit board 4, a pressure differential signal AIN2+ and AIN 2-output by the elastic body 2 are input to a pin 4 and a pin 3 of the pressure signal AD conversion chip U1, a pin 6 and a pin 5 of the pressure signal AD conversion chip U1 are respectively connected to a pin 42 and a pin 41 of the single chip microcomputer U2, a torsion differential signal AIN1+ and an AIN 1-output by the elastic body 3 are input to a pin 4 and a pin 3 of the torsion signal AD conversion chip U3, a pin 6 and a pin 5 of the torsion signal AD conversion chip U3 are respectively connected to a pin 40 and a pin 39 of the single chip microcomputer U38, a pin 1 and a pin 4 of the RS485 level conversion chip U5 are respectively connected to a pin 5 and a pin 7 of the single chip microcomputer U2, a pin 2 and a pin 3 of the RS485 level conversion chip U5 are connected to a common pin 6 of the single chip U2, pin 8 and pin 5 of RS485 level conversion chip U5 are respectively connected to VCC and GND, capacitor C9 is a decoupling capacitor, both ends are respectively connected to VCC and GND, resistor R2 is a pull-up resistor, both ends are respectively connected to pin 7 of VCC and RS485 level conversion chip U5, resistor R4 is a pull-down resistor, both ends are respectively connected to pin 6 of GND and RS485 level conversion chip U5, R3 is a matching resistor, both ends are respectively connected to pin 6 and pin 7 of RS485 level conversion chip U5, D1 is a transient suppressor diode, both ends are respectively connected to pin 7 and GND of RS485 level conversion chip U5, D3 is a transient suppressor diode, both ends are respectively connected to pin 6 and pin 7 of RS485 level conversion chip U5, D2 is a transient suppressor diode, both ends are respectively connected to pin 6 and pin 7 of RS485 level conversion chip U5, pin 6 and pin 7 of RS485 level conversion chip U5 output RS485 bus signals together and are led out of the outer end of RS485 bus 7, and RS485 bus shell is led out of RS485 bus 1.
The pressure signal AD conversion chip U1 and the torsion signal AD conversion chip U3 are AD conversion chips with the model number TM 1237; the singlechip U2 is a singlechip of STC11F series; the RS485 level conversion chip U5 adopts a 485 level conversion chip with the model number of SP 3485.
Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.
Claims (6)
1. The utility model provides a take digital signal output's pressure to turn round compound force transducer which characterized in that: comprises a shell, an elastic body and an internal cavity which are arranged in the shell, a signal processing circuit board which is arranged in the internal cavity, and a stress element which is arranged on the shell, the stress piece is connected with the elastic body, the signal processing circuit board is provided with a single chip microcomputer U2, a pressure signal AD conversion chip U1, a torsion signal AD conversion chip U3 and an RS485 level conversion chip U5, the analog signal input end of the pressure signal AD conversion chip U1 and the analog signal input end of the torsion signal AD conversion chip U3 are connected with the elastic body, the digital signal output end of the AD conversion chip U1 and the digital signal output end of the torsion signal AD conversion chip U3 are connected with the corresponding ports of the single chip microcomputer U2 respectively, the signal input end of the RS485 level conversion chip U5 is connected with the corresponding port of the single chip microcomputer U2, and the signal output end of the RS485 level conversion chip U5 is connected with the RS485 bus.
2. The pressure-torsion composite force sensor with digital signal output according to claim 1, characterized in that: the analog signal input end of the pressure signal AD conversion chip U1 and the analog signal input end of the torsion signal AD conversion chip U3 are respectively connected with the elastic body through corresponding internal cables.
3. The pressure-torsion composite force sensor with digital signal output according to claim 1, characterized in that: the pressure signal AD conversion chip U1 and the torsion signal AD conversion chip U3 are both TM1237 AD conversion chips.
4. The pressure-torsion composite force sensor with digital signal output according to claim 1, characterized in that: the single chip microcomputer U2 is of STC11F series.
5. The pressure-torsion composite force sensor with digital signal output according to claim 1, characterized in that: the RS485 level conversion chip U5 is a 485 level conversion chip with the model number of SP 3485.
6. The pressure-torsion composite force sensor with digital signal output according to claim 1, characterized in that: the inner end of the RS485 bus is connected with the signal output end of the RS485 level conversion chip U5, and the outer end of the RS485 bus is led out of the shell.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120714485.6U CN214333890U (en) | 2021-04-08 | 2021-04-08 | Pressure-torsion composite force sensor with digital signal output |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120714485.6U CN214333890U (en) | 2021-04-08 | 2021-04-08 | Pressure-torsion composite force sensor with digital signal output |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214333890U true CN214333890U (en) | 2021-10-01 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120714485.6U Expired - Fee Related CN214333890U (en) | 2021-04-08 | 2021-04-08 | Pressure-torsion composite force sensor with digital signal output |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214333890U (en) |
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2021
- 2021-04-08 CN CN202120714485.6U patent/CN214333890U/en not_active Expired - Fee Related
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20211001 |