CN215811348U - Distributed pressure monitoring circuit - Google Patents
Distributed pressure monitoring circuit Download PDFInfo
- Publication number
- CN215811348U CN215811348U CN202022161595.2U CN202022161595U CN215811348U CN 215811348 U CN215811348 U CN 215811348U CN 202022161595 U CN202022161595 U CN 202022161595U CN 215811348 U CN215811348 U CN 215811348U
- Authority
- CN
- China
- Prior art keywords
- pressure sensor
- analog switch
- pressure
- output end
- input end
- 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.)
- Active
Links
Images
Landscapes
- Measuring Fluid Pressure (AREA)
Abstract
The utility model provides a distributed pressure monitoring circuit, comprising: the device comprises a pressure sensor array, a three-to-one analog switch, an eight-to-one analog switch, a resistance voltage division circuit and a main controller; the first output end and the second output end of the pressure sensor array are respectively connected with the first input end of the three-in-one analog switch and the first input end of the eight-in-one analog switch, the output end of the three-in-one analog switch and the output end of the eight-in-one analog switch are respectively connected with the first input end and the second input end of the resistance voltage division circuit, the output end of the resistance voltage division circuit is connected with the input end of the main controller, and the first output end and the second output end of the main controller are respectively connected with the second input end of the three-in-one analog switch and the second input end of the eight-in-one analog switch. The utility model has the beneficial effects that: the cost is saved, the pressure value of each pressure sensor can be accurately measured by using fewer chip resources, and the pressure value can be displayed in real time.
Description
Technical Field
The utility model relates to the field of sensors, in particular to a distributed pressure monitoring circuit.
Background
Among the prior art, when measuring pressure sensor's pressure value, especially when measuring a plurality of pressure sensor simultaneously, need use more chip, this leads to the chip too much easily in equipment uses, and is bulky, difficult portable scheduling problem, if measure with less chip then can appear the not high problem of measuring precision.
Disclosure of Invention
In order to solve the above problem, the present invention provides a distributed pressure monitoring circuit, including: the distributed pressure monitoring circuit includes: the device comprises a pressure sensor array, a three-to-one analog switch, an eight-to-one analog switch, a resistance voltage division circuit and a main controller;
the pressure sensor array is used for acquiring resistance information;
the main controller is used for carrying out AD sampling, acquiring a primary voltage value, controlling the three-to-one analog switch and the eight-to-one analog switch through the IO port and further realizing dynamic scanning of the pressure sensor array;
the first output end and the second output end of the pressure sensor array are respectively connected with the first input end of the three-in-one analog switch and the first input end of the eight-in-one analog switch, the output end of the three-in-one analog switch and the output end of the eight-in-one analog switch are respectively connected with the first input end and the second input end of the resistance voltage division circuit, the output end of the resistance voltage division circuit is connected with the input end of the main controller, and the first output end and the second output end of the main controller are respectively connected with the second input end of the three-in-one analog switch and the second input end of the eight-in-one analog switch.
Further, the pressure sensor array is a 21-point pressure sensor array with 3 rows by 7 columns.
Further, the 21-point pressure sensor array is A, B and C, wherein 7 pressure sensors are connected in each row, the row a includes a pressure sensor a1, a pressure sensor a2, a pressure sensor A3, a pressure sensor a4, a pressure sensor a5, a pressure sensor a6 and a pressure sensor a7, the row B includes a pressure sensor B1, a pressure sensor B2, a pressure sensor B3, a pressure sensor B4, a pressure sensor B5, a pressure sensor B6 and a pressure sensor B7, and the row C includes a pressure sensor C1, a pressure sensor C2, a pressure sensor C3, a pressure sensor C4, a pressure sensor C5, a pressure sensor C6 and a pressure sensor C7;
in each row, the input ends of the pressure sensors are connected together;
the 3 pressure sensors at the corresponding positions of each row are arranged into a group, and each group of pressure sensors AiAnd the pressure sensor BiAnd CiAre connected, i 1,2, 3.
Further, the main controller is an STM32F103C chip.
Further, the one-out-of-three analog switch is a TS5A3357-VSSOP chip.
Further, the one-out-of-eight analog switch is a CD4051-SSOP chip.
Further, the resistance voltage division circuit is a TLC2252AIDR-SOP chip.
Further, main control unit passes through bluetooth wireless connection in mobile terminal, main control unit packs the voltage value who acquires and sends to mobile terminal, and this mobile terminal will the voltage value converts the pressure value into, shows this pressure value in real time on mobile terminal's display screen.
The technical scheme provided by the utility model has the beneficial effects that: the cost is saved, the pressure value of each pressure sensor can be accurately measured by using fewer chip resources, and the pressure value can be displayed in real time.
Drawings
The utility model will be further described with reference to the accompanying drawings and examples, in which:
FIG. 1 is a schematic diagram of a distributed pressure monitoring circuit according to an embodiment of the present invention;
FIG. 2 is a schematic diagram of a 21-point pressure sensor array in an embodiment of the utility model;
FIG. 3 is a circuit schematic of the master controller in an embodiment of the utility model;
FIG. 4 is a schematic diagram of a resistance divider AD sampling circuit according to an embodiment of the present invention;
FIG. 5 is a schematic circuit diagram of the connection of the capacitors C1, C2 and C3 in the embodiment of the present invention;
fig. 6 is a circuit schematic of a 21-point pressure sensor array interface in an embodiment of the utility model.
Detailed Description
For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.
The embodiment of the utility model provides a distributed pressure monitoring circuit.
Referring to fig. 1 to 6, fig. 1 is a schematic diagram of a distributed pressure monitoring circuit in an embodiment of the present invention, fig. 2 is a schematic diagram of a 21-point pressure sensor array in an embodiment of the present invention, fig. 3 is a schematic circuit diagram of a main controller in an embodiment of the present invention, fig. 4 is a schematic diagram of a resistance division AD sampling circuit in an embodiment of the present invention, fig. 5 is a schematic circuit diagram of connections of capacitors C1, C2, and C3 in an embodiment of the present invention, and fig. 6 is a schematic circuit diagram of a 21-point pressure sensor array interface in an embodiment of the present invention, which specifically includes: the device comprises a pressure sensor array, a three-to-one analog switch, an eight-to-one analog switch, a resistance voltage division circuit and a main controller;
the pressure sensor array is used for acquiring resistance information;
the main controller is used for carrying out AD sampling, acquiring a primary voltage value, controlling the three-to-one analog switch and the eight-to-one analog switch through the IO port and further realizing dynamic scanning of the pressure sensor array; in this embodiment, main control unit chooses STM32 singlechip for use.
The first output end and the second output end of the pressure sensor array are respectively connected with the first input end of the three-in-one analog switch and the first input end of the eight-in-one analog switch, the output end of the three-in-one analog switch and the output end of the eight-in-one analog switch are respectively connected with the first input end and the second input end of the resistance voltage division circuit, the output end of the resistance voltage division circuit is connected with the input end of the main controller, and the first output end and the second output end of the main controller are respectively connected with the second input end of the three-in-one analog switch and the second input end of the eight-in-one analog switch.
As shown in fig. 2, the pressure sensor array is a 21-point pressure sensor array with 3 rows by 7 columns. The 21-point pressure sensor array is composed of A, B rows and C rows, wherein 7 pressure sensors are connected in each row, the A row comprises a pressure sensor A1, a pressure sensor A2, a pressure sensor A3, a pressure sensor A4, a pressure sensor A5, a pressure sensor A6 and a pressure sensor A7, the B row comprises a pressure sensor B1, a pressure sensor B2, a pressure sensor B3, a pressure sensor B4, a pressure sensor B5, a pressure sensor B6 and a pressure sensor B7, and the C row comprises a pressure sensor C1, a pressure sensor C2, a pressure sensor C3, a pressure sensor C4, a pressure sensor C5, a pressure sensor C6 and a pressure sensor C7.
In each row, the input ends of the pressure sensors are connected together; the input end of the pressure sensor A1 is connected with the input ends of a pressure sensor A2, a pressure sensor A3, a pressure sensor A4, a pressure sensor A5, a pressure sensor A6 and a pressure sensor A7, the input end of the pressure sensor B1 is connected with the input ends of a pressure sensor B2, a pressure sensor B3, a pressure sensor B4, a pressure sensor B5, a pressure sensor B6 and a pressure sensor B7, and the input end of the pressure sensor C1 is connected with the input ends of a pressure sensor C2, a pressure sensor C3, a pressure sensor C4, a pressure sensor C5, a pressure sensor C6 and a pressure sensor C7;
the output end of each group of pressure sensors Ai is connected with the output ends of the pressure sensors Bi and Ci, i is 1,2, 3.
The main controller is wirelessly connected to the mobile terminal through Bluetooth, the main controller packs the acquired voltage value and sends the voltage value to the mobile terminal, and the mobile terminal converts the voltage value into a pressure value and displays the pressure value on a display screen of the mobile terminal in real time.
The main controller is an STM32F103C chip. The one-out-of-three analog switch is a TS5A3357-VSSOP chip. The one-out-of-eight analog switch is a CD4051-SSOP chip. The resistance voltage division circuit is a TLC2252AIDR-SOP chip.
Resistance value data of the 21-point pressure sensor array are led out through ten lines of A, B, C,1,2,3,4,5,6 and 7 and are respectively connected into a three-in-one analog switch and an eight-in-one analog switch. The output that selects an analog switch and eight to select an analog switch three respectively connects in resistance bleeder circuit's first input and second input, the STM32 singlechip passes through IO mouth control three and selects an analog switch and eight select an analog switch, select a certain analog switch to open, another analog switch is closed, thereby realize the dynamic scanning of pressure sensor array, switch over at every turn, the STM32 singlechip acquires resistance bleeder circuit's voltage value once through AD sampling, 21 times switch over to a cycle, accomplish the measurement of an array. Then STM32 singlechip sends the cell-phone APP with data packing through bluetooth module, and the cell-phone APP converts the voltage value into the pressure value, shows in real time.
Each pressure sensor is a resistance type pressure sensor, and the pressure sensors are combined into a pressure sensor array with three rows and seven columns. The resistance value of each sensor can be measured by using less chip resources by means of dynamic scanning of rows and columns.
The resistance value data of the 21-point pressure sensor array is respectively connected with pins 1,2,3,4,5,6,7 of the TS5A3357-VSSOP chip through interfaces A, B and C, and respectively connected with pins 13,14,15,12,1,5,2, CD4051-SSOP chip pin 3 of TLC2252AIDR-SOP chip pin 3, TLC2252AIDR-SOP chip pin 3 is also connected with resistors R6, TLC2252AIDR-SOP chip pin 8 is respectively connected with pins 24,36 and 48 of STM32 chip, TLC2252AIDR-SOP chip pin 1 is connected with pin 15 of STM32 chip, TS5A3357- VSSOP chip pins 6 and 5 are respectively connected with pins 11 and 12 of STM32 chip, and pins 6,11,10 and 9 of CD 51-SSOP chip are respectively connected with pins 29, STM32 and STM 32.
The utility model has the beneficial effects that: the cost is saved, the pressure value of each pressure sensor can be accurately measured by using fewer chip resources, and the pressure value can be displayed in real time.
The above description is only for the purpose of illustrating the preferred embodiments of the present invention and is not to be construed as limiting the utility model, and any modifications, equivalents, improvements and the like that fall within the spirit and principle of the present invention are intended to be included therein.
Claims (8)
1. A distributed pressure monitoring circuit, its characterized in that: the distributed pressure monitoring circuit includes: the device comprises a pressure sensor array, a three-to-one analog switch, an eight-to-one analog switch, a resistance voltage division circuit and a main controller;
the pressure sensor array is used for acquiring resistance information;
the main controller is used for carrying out AD sampling, acquiring a primary voltage value, controlling the three-to-one analog switch and the eight-to-one analog switch through the IO port and further realizing dynamic scanning of the pressure sensor array;
the first output end and the second output end of the pressure sensor array are respectively connected with the first input end of the three-in-one analog switch and the first input end of the eight-in-one analog switch, the output end of the three-in-one analog switch and the output end of the eight-in-one analog switch are respectively connected with the first input end and the second input end of the resistance voltage division circuit, the output end of the resistance voltage division circuit is connected with the input end of the main controller, and the first output end and the second output end of the main controller are respectively connected with the second input end of the three-in-one analog switch and the second input end of the eight-in-one analog switch.
2. The distributed pressure monitoring circuit of claim 1, wherein: the pressure sensor array is a 21-point pressure sensor array with 3 rows by 7 columns.
3. A distributed pressure monitoring circuit according to claim 2, wherein: the 21-point pressure sensor array is composed of A, B and C three rows, wherein 7 pressure sensors are connected in each row, the A row comprises a pressure sensor A1, a pressure sensor A2, a pressure sensor A3, a pressure sensor A4, a pressure sensor A5, a pressure sensor A6 and a pressure sensor A7, the B row comprises a pressure sensor B1, a pressure sensor B2, a pressure sensor B3, a pressure sensor B4, a pressure sensor B5, a pressure sensor B6 and a pressure sensor B7, and the C row comprises a pressure sensor C1, a pressure sensor C2, a pressure sensor C3, a pressure sensor C4, a pressure sensor C5, a pressure sensor C6 and a pressure sensor C7;
in each row, the input ends of the pressure sensors are connected together;
taking 3 pressure sensors at corresponding positions of each row as a group, wherein each group of pressure sensors AiAnd the pressure sensor BiAnd CiAre connected, i 1,2, 3.
4. The distributed pressure monitoring circuit of claim 1, wherein: the main controller is an STM32F103C chip.
5. The distributed pressure monitoring circuit of claim 1, wherein: the one-out-of-three analog switch is a TS5A3357-VSSOP chip.
6. The distributed pressure monitoring circuit of claim 1, wherein: the one-out-of-eight analog switch is a CD4051-SSOP chip.
7. The distributed pressure monitoring circuit of claim 1, wherein: the resistance voltage division circuit is a TLC2252AIDR-SOP chip.
8. The distributed pressure monitoring circuit of claim 1, wherein: the main controller is wirelessly connected to the mobile terminal through Bluetooth, the main controller packs the acquired voltage value and sends the voltage value to the mobile terminal, and the mobile terminal converts the voltage value into a pressure value and displays the pressure value on a display screen of the mobile terminal in real time.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022161595.2U CN215811348U (en) | 2020-09-27 | 2020-09-27 | Distributed pressure monitoring circuit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202022161595.2U CN215811348U (en) | 2020-09-27 | 2020-09-27 | Distributed pressure monitoring circuit |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN215811348U true CN215811348U (en) | 2022-02-11 |
Family
ID=80124287
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202022161595.2U Active CN215811348U (en) | 2020-09-27 | 2020-09-27 | Distributed pressure monitoring circuit |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN215811348U (en) |
-
2020
- 2020-09-27 CN CN202022161595.2U patent/CN215811348U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN201917614U (en) | Space ship-oriented explosive device testing device | |
| CN215811348U (en) | Distributed pressure monitoring circuit | |
| CN207457458U (en) | A kind of accumulator wireless inspection device | |
| CN205301413U (en) | Test system for vehicle quiescent current | |
| CN202837383U (en) | System for batch measurement of battery voltage | |
| CN209342222U (en) | Electronic scale | |
| CN207098640U (en) | A kind of USB safe chargings monitoring for protection instrument | |
| CN113470489B (en) | Network type bridge resistance test experiment instrument and operation method | |
| CN211123230U (en) | Portable automatic debugging system for calibrator | |
| CN201035055Y (en) | Duct spreading device of LRC tester | |
| CN209571216U (en) | A kind of LED display mould group automatic white balance debugging system | |
| CN206924080U (en) | A kind of human strength and sign measuring device | |
| CN202871161U (en) | Bridge addition and subtraction characteristic demonstrator | |
| CN202631191U (en) | Pressure meter measuring instrument | |
| CN202258037U (en) | Teaching experimental instrument of force resolution on slope | |
| CN201314947Y (en) | Battery-detecting instrument | |
| CN201950942U (en) | Roller offset press gripping and correcting state detector | |
| CN205390506U (en) | Sports shoes accuse temperature energy storage system | |
| CN102128696B (en) | Occlusion regulating state detector of rolling offset printing press | |
| CN218724932U (en) | Isolator touches finger pressure test device | |
| CN215767448U (en) | Automatic detection device for clothes popping sensor | |
| CN213282288U (en) | Bed board capable of weighing body intelligently | |
| CN208240705U (en) | Minisize thermoelectric heap infrared sensor | |
| CN212256677U (en) | Volt-ampere characteristic experiment instrument for wireless data acquisition and transmission resistance element | |
| CN206095394U (en) | Lazy people's balance in bedroom |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |