CN204359448U - A kind of multifunction multipath temperature monitoring - Google Patents
A kind of multifunction multipath temperature monitoring Download PDFInfo
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- CN204359448U CN204359448U CN201420792637.4U CN201420792637U CN204359448U CN 204359448 U CN204359448 U CN 204359448U CN 201420792637 U CN201420792637 U CN 201420792637U CN 204359448 U CN204359448 U CN 204359448U
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- temperature
- temperature monitoring
- time
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Abstract
A kind of multifunction multipath temperature monitoring that the utility model provides is for realization designs the real-time monitoring alarming of multi-point temp.Adopt the temperature of 4 DS18B20 temperature sensors to 4 differences to measure, and can increase flexibly; Adding DS1302 clock chip to reach real-time object, while measuring tempeature, providing precise time when different temperatures produces; The temperature of the change obtained, temperature acquisition point and time thereof are stored, have employed serial EEPROM chip AT24C08 temperature information storage time, by the man-machine interface of 1602 liquid crystal display close friends, result is perfectly presented to user.
Description
Technical field
The utility model relates to temperature monitoring field, particularly a kind of multifunction multipath temperature monitoring.
Background technology
The collection monitoring of temperature has purposes widely in daily life, is no matter in industry, agricultural production or in daily life, all often needs the change of monitor temperature to adjust in time.Such as will carry out Real-Time Monitoring to the temperature in booth in agricultural production and keep optimum condition to make it.Traditional temperature monitoring adopts thermoelectricity occasionally thermal resistance, hardware-software debugging is complicated, cost is high, and when measuring in real time temperature, the time when temperature changes a lot can not be recorded, thus record value excessive for the change in one period is carried out secondary storage and reports to the police, be not easy to the monitoring to historical data, arrangement and analysis.Self structure is single simultaneously, and usable range is less.
Utility model content
Utility model object of the present utility model is: for above-mentioned Problems existing, provides a kind of multifunction multipath temperature monitoring, to historgraphic data recording, can be convenient to analysis and arrangement, cheap, and usable range is wide.
A kind of multifunction multipath temperature monitoring, comprising: master controller, temperature measuring section, data storage section, warning device and display section.Described master controller adopts AT89S52 single-chip microcomputer, and operating voltage 4.0V to 5.5V, have 8K byte FLASH memory and 256 byte ram in slice, full static clock scope is from 0 ~ 33MHz.P0 with P2 is connected liquid crystal display circuit, and P1 connects reception temperature sensor.
Temperature measuring section adopts temperature sensor DS18B20, and this sensor can realize the temperature reading of 9-12 position, and temperature measurement range is :-55 ~+125, and results conversion, up to 0.0625, is become serial digital signal by thermometric resolution.Owing to adopting unibus structure, each 18B20 has unique label, and data terminal all links P1^1 mouth place.
Data storage section can only deposit master routine due to the 8K register of single-chip microcomputer inside, so need external memory storage, the utility model adopts AT24C08, and this chip has the EEPROM storage space of 8K, and passes through I between single-chip microcomputer
2c bussing technique communicates, and three address end A0, A1 and A2 can give different addresses for each storer, can be suspended to single-chip microcomputer at most get on 8.
Alarm portion mainly comprises a hummer, when needing after single-chip microcomputer is by program verification to report to the police, just exports a high level turn-on transistor, and hummer has electric current to flow through both can to report to the police.
Display section adopts the LCD1602 dot matrix character escope of band backlight.This display is specifically designed to display letter, numeral and symbol etc., and it is integrated with HD44780 controller, is a Liquid crystal module.The capacity of display is 16 × 2 characters, chip operating voltage: 4.5 ~ 5.5V, and optimum operating voltage 5.0V always has 16 pins, 11 instructions.
Temperature measurement module program part, its initialization step is: (1) single-chip microcomputer drags down more than single line 480us and produces reset pulse; (2) discharge this line, enter Rx receiving mode; (3) time delay 40us after the rising edge produced when 18B20 detects single-chip microcomputer release bus; (4) drag down bus 60 ~ 240us and produce transponder pulse, after single-chip microcomputer receives, send ROM operational order, memory operation commands and data processing.
In sum, the beneficial effects of the utility model are:
A kind of multifunction multipath temperature monitoring alarm that the utility model provides is low in energy consumption, advanced technology, minimum resource can be utilized to carry out high-precision measurement to multiple spot different temperatures, and while meeting real-time, can Record Comparison be carried out to historical data and provide information, there is higher intellectuality; Dependable performance, operation facility, complicated work has been come by software programming, and user of service can obtain result easily.
Accompanying drawing explanation
Fig. 1 is structured flowchart of the present utility model.
Mark in figure: the storage of 1-data, 2-single-chip microcomputer, 3-temperature alarming, 4-liquid crystal display, 5-temperature survey, 6-real-time clock, 7-supervisory keyboard.
Embodiment
A kind of multifunction multipath temperature monitoring, comprising: master controller, temperature measuring section, data storage section, warning device and display section, this wherein topmost part be middle main control module part, temperature survey
Completed by DS18B20 temperature sensor.The measurement result of sensor, owing to being export with digital signal form, can directly give single-chip microcomputer process.Single-chip microcomputer is after receiving data, on the one hand the temperature value in this moment is delivered to liquid crystal display to show, whether contrast changes with temperature data before on the other hand, if changing just is stored in external data memory AT24C08 by temperature value together with the time of change, if twice storage has larger fluctuation, will automatic alarm simultaneously this is carried out storing separately being beneficial to check.When user wants to check the time, carry out display by keyboard and switch, just can realize the flexible switching of temperature monitoring and time clock feature.It is characterized in that: master controller adopts AT89S52 single-chip microcomputer, operating voltage 4.0V to 5.5V, have 8K byte FLASH memory and 256 byte ram in slice, full static clock scope is from 0 ~ 33MHz, its maximum convenience room is supported in System Programming ISP, can carry out up to 1000 times erasable, save design cost.In the mouth line of single-chip microcomputer, P0 and P2 be used for liquid crystal display circuit, P1 mouth for receive temperature sensor input data and with between chip external memory through row exchanges data, P3 mouth be used for the look-at-me of input keyboard and the signal of real-time timepiece chip.
A very crucial effect is played in temperature survey in this monitor, and traditional mode adopts thermoelectricity occasionally thermal resistance, but hardware-software debugging is complicated, and cost is high.Here have selected the unibus system digital temperature sensor DS18B20 that DALLAS company of the U.S. produces.This sensor can realize the temperature reading of 9-12 position, and temperature measurement range is :-55 ~+125, and results conversion, up to 0.0625, is become serial digital signal by thermometric resolution.Owing to adopting unibus structure, each 18B20 has unique label, has saved mouth line resource.Data terminal all links P1^1 mouth place.When reading data, read different temperature sensor value to realize multimetering by the unique sequence numbers sending sensor.
The time of temperature value when temperature being changed and correspondence is needed to store in data storage section, here the temporal information stored is from DS1302, inside be provided with year, month, day, hour, min, second register, the value of direct readout register can obtain the time, use flexibly.Because the FLASH storage space of the inner 8K of single-chip microcomputer can only deposit master routine, external memory storage must be selected.The utility model is selected to adopt AT24C08, and this chip has the EEPROM storage space of 8K, and passes through I between single-chip microcomputer
2c bussing technique communicates, and three address end A0, A1 and A2 can give different addresses for each storer, can be suspended to single-chip microcomputer at most get on 8, and only takies two mouth lines with the interface of single-chip microcomputer, in U7 and U8 shown in.More chip can be added according to actual needs, select degree of freedom larger.
Alarm portion hardware circuit is relatively simple, a mainly hummer, when needing after single-chip microcomputer is by program verification to report to the police, just exports a high level turn-on transistor, and hummer has electric current to flow through both can to report to the police.Alarm portion mainly also will depend on that can the design of software accurately accurately contrast not data in the same time.
In order to provide a more good display interface, the LCD1602 dot matrix character escope of band backlight is selected in this design.This display is specifically designed to display letter, numeral and symbol etc., and it is integrated with HD44780 controller, is a Liquid crystal module.The capacity of display is 16 × 2 characters, chip operating voltage: 4.5 ~ 5.5V, and optimum operating voltage 5.0V always has 16 pins, 11 instructions.Its another large advantage is exactly that power consumption mainly consumes in electrode therein and drive IC, and thus power consumption wants much less than other display.
The multi-functional realization of for the benefit of this design and higher programming efficiency, adopt C language to programme.Because 18B20 is unibus structure, read the value of 4 temperature sensors, first must write the control word of different numbering, then read corresponding temperature value, the numbering of each sensor is obtained by program in advance.After reading in temperature, with it last minute time temperature value contrast, if temperature variation has exceeded the scope (being just set to 2) of setting, so just by change after temperature value together with change moment stored in chip external memory, this is that one-level stores, if change can separately be established more than 3(in 1h), then while triggering buzzer warning, these data are being taken out storage separately, this is secondary storage.Separately establish button can change display state, by the information displaying of real-time clock out, a temperature monitoring moment just becomes a digital clock.
That the utility model adopts is the DS18B20 of unibus structure, and first must carry out initialization before use, its initialization step comprises: single-chip microcomputer produces reset pulse by dragging down more than single line 480us, then discharges this line, enters Rx receiving mode.A rising edge can be produced during single-chip microcomputer release bus, 18B20 detects time delay 40us after this rising edge, transponder pulse is produced by dragging down bus 60 ~ 240us, just illustrating after single-chip microcomputer receives has single wire device to exist, and just can send ROM operational order, memory operation commands and data processing afterwards.Realize multichannel measurement single-chip microcomputer will some operations to numerous online 18B20 time, first coupling ROM order (55H) will be sent, and then single-chip microcomputer provides 64 bit sequences, is exactly afterwards specifically to read its temperature value for certain, but start-up temperature conversion command all carries out all.
Claims (5)
1. a multifunction multipath temperature monitoring, comprise: master controller, temperature measuring section, data storage section, warning device and display section, it is characterized in that: described master controller adopts AT89S52 single-chip microcomputer, operating voltage 4.0V to 5.5V, have 8K byte FLASH memory and 256 byte ram in slice, full static clock scope is connected liquid crystal display circuit from 0 ~ 33MHz, P0 and P2, and P1 connects reception temperature sensor.
2. a kind of multifunction multipath temperature monitoring according to claim 1, it is characterized in that: temperature measuring section adopts temperature sensor DS18B20, the temperature reading of 9-12 position can be realized, temperature measurement range is :-55 ~+125, thermometric resolution can reach 0.0625, results conversion is become serial digital signal, and each 18B20 has unique label, and data terminal all links P1^1 mouth place.
3. a kind of multifunction multipath temperature monitoring according to claim 1, is characterized in that: external memory storage adopts AT24C08, has the EEPROM storage space of 8K, and passes through I between single-chip microcomputer
2c bussing technique communicates, and it is 8 that single-chip microcomputer can hang at most number.
4. a kind of multifunction multipath temperature monitoring according to claim 1, is characterized in that: alarm portion mainly comprises a hummer, and during warning, export a high level turn-on transistor, hummer has electric current to flow through.
5. a kind of multifunction multipath temperature monitoring according to claim 1, it is characterized in that: display section adopts the LCD1602 dot matrix character escope of band backlight, be integrated with HD44780 controller, the capacity of display is 16 × 2 characters, chip operating voltage: 4.5 ~ 5.5V, optimum operating voltage 5.0V, always has 16 pins, 11 instructions.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420792637.4U CN204359448U (en) | 2014-12-16 | 2014-12-16 | A kind of multifunction multipath temperature monitoring |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420792637.4U CN204359448U (en) | 2014-12-16 | 2014-12-16 | A kind of multifunction multipath temperature monitoring |
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| CN204359448U true CN204359448U (en) | 2015-05-27 |
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| CN201420792637.4U Expired - Fee Related CN204359448U (en) | 2014-12-16 | 2014-12-16 | A kind of multifunction multipath temperature monitoring |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105159598A (en) * | 2015-06-30 | 2015-12-16 | 广州市邦沃电子科技有限公司 | Method for reading total usage time from any device |
| CN105675157A (en) * | 2015-11-09 | 2016-06-15 | 广州齐天冷链科技有限公司 | Cold accumulation state determination method and determination instrument |
| CN105758539A (en) * | 2014-12-16 | 2016-07-13 | 成都问达茂源科技有限公司 | Multifunctional multipath temperature monitor |
| CN108007586A (en) * | 2017-11-24 | 2018-05-08 | 海宁智测光电科技有限公司 | A kind of multichannel temperature monitoring and control device and method |
-
2014
- 2014-12-16 CN CN201420792637.4U patent/CN204359448U/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN105758539A (en) * | 2014-12-16 | 2016-07-13 | 成都问达茂源科技有限公司 | Multifunctional multipath temperature monitor |
| CN105159598A (en) * | 2015-06-30 | 2015-12-16 | 广州市邦沃电子科技有限公司 | Method for reading total usage time from any device |
| CN105159598B (en) * | 2015-06-30 | 2018-11-20 | 广州市邦沃电子科技有限公司 | A method of it is read in arbitrary equipment and uses total time |
| CN105675157A (en) * | 2015-11-09 | 2016-06-15 | 广州齐天冷链科技有限公司 | Cold accumulation state determination method and determination instrument |
| CN108007586A (en) * | 2017-11-24 | 2018-05-08 | 海宁智测光电科技有限公司 | A kind of multichannel temperature monitoring and control device and method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20150527 Termination date: 20151216 |
|
| EXPY | Termination of patent right or utility model |