CN206450329U - A kind of multi-point temperature measurement Acquisition Instrument based on DS18B20 - Google Patents
A kind of multi-point temperature measurement Acquisition Instrument based on DS18B20 Download PDFInfo
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- CN206450329U CN206450329U CN201621431605.7U CN201621431605U CN206450329U CN 206450329 U CN206450329 U CN 206450329U CN 201621431605 U CN201621431605 U CN 201621431605U CN 206450329 U CN206450329 U CN 206450329U
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- monobus
- ds18b20
- acquisition instrument
- temperature measurement
- point temperature
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Abstract
The utility model is related to a kind of multi-point temperature measurement Acquisition Instrument based on DS18B20, plate and telecommunication circuit is selected to constitute by single-chip computer control system, electric power management circuit, monobus driver, memory cell, dust piece, electric power management circuit, memory cell and telecommunication circuit connection single-chip computer control system, single-chip computer control system connects monobus driver, monobus driver interface channel piece selects plate, and dust piece selects plate to connect temperature sensor DS18B20.The utility model at most can access 256 temperature sensors, solve field temperature sensor acquisition problems, reduce the cost of temperature sensor collection.
Description
Technical field
The utility model belongs to field of civil engineering, and industry is monitored applied to structure safety and Health, refers in particular to a kind of be used for greatly
The Acquisition Instrument of amount temperature collection.
Background technology
Modernization construction and the national economic development are rapid, and the requirement that society is realized to production environment and living environment is also more next
It is higher.The monitoring and control of humiture turns into very important technology in production process.Temperature sensor should in industrial circle
With scope widely, it is mainly used to detection temperature in structure safety and Health monitoring industry, is that environment parameter monitoring is indispensable
Part.The Acquisition Instrument for collecting temperature sensor can only typically connect a temperature sensor in the market, and project is existing
Field generally requires substantial amounts of temperature test point, disposes after substantial amounts of temperature sensor, is configured with substantial amounts of temperature sensor, causes
The increase of project monitoring cost.
Utility model content
For it is above-mentioned the problem of, the utility model provide a kind of multi-point temperature measurement Acquisition Instrument based on DS18B20, Mei Getong
Road can connect 8 temperature sensors, and the number of channels of multi-point temperature measurement Acquisition Instrument can be improved according to configuring the need for scene
Disposition flexibility, due to reducing the usage quantity of temperature sensor, monitoring cost declines, and has promoted the application of temperature monitoring.
The utility model is realized by following technical proposals：A kind of multi-point temperature measurement Acquisition Instrument based on DS18B20, by list
Piece machine control system, electric power management circuit, monobus driver, memory cell, dust piece select plate and telecommunication circuit to constitute, power supply
Circuit, memory cell and telecommunication circuit connection single-chip computer control system are managed, single-chip computer control system connects monobus driver,
Monobus driver interface channel piece selects plate, and dust piece selects plate to connect temperature sensor DS18B20.
Single-chip computer control system is using STM32 single-chip microcomputers as control unit, and the supply voltage of STM32 single-chip microcomputers is
3.3V, is provided by electric power management circuit, and multi-point temperature measurement Acquisition Instrument outside input 12V power supplys, are that system is each after multilevel decompression
Individual module provides supply voltage.
STM32 single-chip microcomputers are connected by I2C buses with monobus driver and memory cell, monobus driver and storage
Unit is assigned different address of devices in I2C buses, can be used in conjunction with same I2C buses.Piece selects plate to be connected to list
Bus driver input., it is necessary to be deposited temperature sensor in-line coding ID by telecommunication circuit interface after the completion of field deployment
Store up to the memory cell of multi-point temperature measurement Acquisition Instrument.When collecting temperature, single-chip computer control system is by reading in memory cell
Temperature sensor encodes ID, then by I2C bus marco monobus drivers, single-chip computer control system built-in search algorithm,
The temperature sensor being connected on multi-point temperature measurement Acquisition Instrument passage will be inquired by searching algorithm, then single-chip computer control system
The temperature sensor found is acquired.Monobus driver can control the MOSFET element of external connection, for single total
Line strong pull-up, improves monobus load capacity, meanwhile, monobus is directly pulled to power supply by monobus by pull-up resistor, this
Sample, can connect 8 digital temperature sensors in the case where not increasing overhead above single passage.Before collection, by
STM32 single-chip microcomputers take out operation digital temperature sensor coding ID from memory device, are sent by monobus driver to list
In bus, the digital temperature sensor mounted on monobus, the temperature sensor coding ID that automatic contrast is received, if it is determined that with
The temperature sensor of oneself laser encodes ID unanimously, then gating receives subsequent commands, if it is determined that be not consistent, then it is follow-up to order
Order is not responding to, until next reduced temperature sensor encodes ID.By the outside MOSFET element of monobus driver pull-up and
The power supply strong pull-up of monobus, improves monobus driving force, realizes single channel and connects 8 digital temperature sensors, together
When, monobus is by way of two kinds of pull-up, the communication distance that monobus can be made to extend to 400 meters, substantially increase communication away from
From, can make digital temperature sensor distribution deployment.Multi-point temperature measurement Acquisition Instrument can be by way of dust piece selects plate, by passage
Extension, could support up 32 passages, each passage can connect 8 temperature sensors, and a multi-point temperature measurement Acquisition Instrument can be gathered
Live 256 digital temperature sensors, save acquisition cost.
The utility model solves a large amount of temperature sensor acquisition problems, multi-point temperature measurement collection described in the utility model
Instrument, by built-in search algorithm and monobus actuation techniques, can make multi-point temperature measurement Acquisition Instrument access most 256 TEMPs
Device, solves field temperature sensor acquisition problems, reduces the cost of temperature sensor collection.
Brief description of the drawings
Fig. 1 is multi-point temperature measurement Acquisition Instrument schematic diagram of the present utility model.
Fig. 2 is monobus drive circuit connection figure.
Embodiment
The utility model is further elucidated below in conjunction with the accompanying drawings.
A kind of reference picture 1, multi-point temperature measurement Acquisition Instrument based on DS18B20 is mainly total by single-chip computer control system (6), list
Line drive (4), temperature sensor DS18B20 (1), dust piece select plate (3), memory cell (7), telecommunication circuit (8) and power supply
Manage the composition such as circuit (5).
Single-chip computer control system (6) uses STM32 single-chip microcomputers, and monobus driver (4) is mono- by I2C buses and STM32
Piece machine is connected, while the I2C buses are also associated with memory cell (7), memory cell uses EEPROM device, is wiped with repeatable
Write attribute.Memory cell (7) possesses different address of devices in I2C buses from monobus driver (4), and STM32 single-chip microcomputers can
To be communicated according to different address of devices.Electric power management circuit (5) and telecommunication circuit (8) are directly and single-chip computer control system
(6) connect, telecommunication circuit (8) uses 485 buses, and the temperature data of collection is sent to control end.Monobus driver (4) is even
It is connected to dust piece and selects plate (3), dust piece selects plate (3) using the pattern of one group of 4 passage, i.e., every piece dust piece selects plate (3) there are 4 to lead to
Road, multi-point temperature measurement Acquisition Instrument can at most configure 8 pieces of dust pieces and select plate (3), and scene can be according to temperature sensor DS18B20
(1) actual deployment quantity, flexible configuration dust piece selects plate (3), can so reduce cost.Dust piece selects plate (3) to connect
Temperature sensor DS18B20 (1), temperature sensor DS18B20 (1) selects plate (3) to be connected by monobus (2) with dust piece, often
The monobus (2) of individual passage can at most connect 8 temperature sensor DS18B20 (1).
After the completion of multi-point temperature measurement Acquisition Instrument field deployment, by telecommunication circuit (8) by all TEMPs of joint connection in site
Device DS18B20 (1) in-line coding ID is stored in memory cell (7).After collection starts, single-chip computer control system (6) is first
Temperature sensor DS18B20 (1) coding ID is read from memory cell (7), then control passage piece selects plate (3), pass through search
Algorithm, finds carry corresponding temperature sensor DS18B20 (1) on monobus (2), after the completion of search, STM32 single-chip microcomputers
Temperature sensor DS18B20 (1) is gated by monobus (2), temperature data reading is then carried out.
Monobus driver (4) can control the MOSFET element of external connection, for monobus (2) strong pull-up, improve
Monobus load capacity, meanwhile, monobus (2) by pull-up resistor (as shown in Fig. 2 monobus has 470 Ω pull-up resistor,
Monobus driving force can be improved), monobus is directly pulled to power supply, so, the feelings of overhead can not increased
8 digital temperature sensors are connected under condition above single passage.Pulled up by the outside MOSFET element of monobus driver (4)
With the power supply strong pull-up of monobus, monobus driving force is improved, single channel is realized and connects 8 temperature sensors
DS18B20 (1), meanwhile, monobus is by way of two kinds of pull-up, the communication distance that monobus can be made to extend to 400 meters, significantly
Communication distance is improved, temperature sensor DS18B20 (1) distribution deployment can be made.Multi-point temperature measurement Acquisition Instrument can pass through passage
Piece selects the mode of plate (3), and passage is extended, and could support up 32 passages, and each passage can connect 8 temperature sensors, one
Multi-point temperature measurement Acquisition Instrument can save acquisition cost with 256 digital temperature sensors of collection site.
Preferred embodiment of the present utility model is described in detail above in association with accompanying drawing, still, the utility model is not limited
Detail in above-mentioned embodiment, can be to skill of the present utility model in range of the technology design of the present utility model
Art scheme carries out a variety of simple variants, and these simple variants belong to protection domain of the present utility model.
Claims (8)
1. a kind of multi-point temperature measurement Acquisition Instrument based on DS18B20, it is characterized in that by single-chip computer control system, electric power management circuit,
Monobus driver, memory cell, dust piece select plate and telecommunication circuit to constitute, electric power management circuit, memory cell and communication electricity
Road connects single-chip computer control system, single-chip computer control system connection monobus driver, the choosing of monobus driver interface channel piece
Plate, dust piece selects plate to connect temperature sensor DS18B20.
2. the multi-point temperature measurement Acquisition Instrument according to claim 1 based on DS18B20, it is characterized in that：The monobus driving
Device and memory cell are connected by I2C buses with single-chip computer control system.
3. the multi-point temperature measurement Acquisition Instrument according to claim 1 based on DS18B20, it is characterized in that：Telecommunication circuit and power supply
Management circuit is directly connected by I/O port with single-chip computer control system.
4. the multi-point temperature measurement Acquisition Instrument according to claim 1 based on DS18B20, it is characterized in that：Temperature sensor
DS18B20 is connected with monobus driver using monobus mode.
5. the multi-point temperature measurement Acquisition Instrument according to claim 1 based on DS18B20, it is characterized in that：Every piece of dust piece selects plate
It is made up of 4 passages, each passage at most 8 temperature sensors of connection, the 8 dust piece choosings of the most carries of multi-point temperature measurement Acquisition Instrument
Plate.
6. the multi-point temperature measurement Acquisition Instrument according to claim 1 based on DS18B20, it is characterized in that：The monobus driving
Device controls the MOSFET element of external connection, for monobus strong pull-up.
7. the multi-point temperature measurement Acquisition Instrument according to claim 6 based on DS18B20, it is characterized in that：The monobus is provided with
470 Ω pull-up resistor.
8. the multi-point temperature measurement Acquisition Instrument according to claim 1 based on DS18B20, it is characterized in that：Single-chip computer control system
Using STM32 single-chip microcomputers as control unit, the supply voltage of STM32 single-chip microcomputers is 3.3V, is provided by electric power management circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621431605.7U CN206450329U (en) | 2016-12-23 | 2016-12-23 | A kind of multi-point temperature measurement Acquisition Instrument based on DS18B20 |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621431605.7U CN206450329U (en) | 2016-12-23 | 2016-12-23 | A kind of multi-point temperature measurement Acquisition Instrument based on DS18B20 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206450329U true CN206450329U (en) | 2017-08-29 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621431605.7U Active CN206450329U (en) | 2016-12-23 | 2016-12-23 | A kind of multi-point temperature measurement Acquisition Instrument based on DS18B20 |
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| CN (1) | CN206450329U (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586750A (en) * | 2018-12-20 | 2019-04-05 | 苏州路之遥科技股份有限公司 | A kind of monobus communication signal enhancing circuit |
| CN112595370A (en) * | 2021-01-07 | 2021-04-02 | 郑州利凌电子科技有限公司 | Temperature and humidity acquisition circuit based on single bus |
-
2016
- 2016-12-23 CN CN201621431605.7U patent/CN206450329U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109586750A (en) * | 2018-12-20 | 2019-04-05 | 苏州路之遥科技股份有限公司 | A kind of monobus communication signal enhancing circuit |
| CN109586750B (en) * | 2018-12-20 | 2020-12-01 | 苏州路之遥科技股份有限公司 | Single bus communication signal enhancement circuit |
| CN112595370A (en) * | 2021-01-07 | 2021-04-02 | 郑州利凌电子科技有限公司 | Temperature and humidity acquisition circuit based on single bus |
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