CN102279011A - Temperature-humidity recorder with low power consumption - Google Patents
Temperature-humidity recorder with low power consumption Download PDFInfo
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- CN102279011A CN102279011A CN201110180576A CN201110180576A CN102279011A CN 102279011 A CN102279011 A CN 102279011A CN 201110180576 A CN201110180576 A CN 201110180576A CN 201110180576 A CN201110180576 A CN 201110180576A CN 102279011 A CN102279011 A CN 102279011A
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Abstract
The invention discloses a temperature-humidity recorder with low power consumption. The temperature-humidity recorder with low power consumption comprises a microcontroller (U1), a plurality of external reservoirs, a temperature-humidity sensor (sensor 1), a general serial port bus chip (U6), and a general serial interface (J1). The microcontroller (U1) is connected with the temperature-humidity sensor (sensor 1) and the plurality of external reservoirs through I/O ports and the general serial interface (J1) is connected with the microcontroller (U1) through the general serial port bus chip (U6).
Description
Technical field
The present invention relates to a kind of low-power consumption, small size, the portable warm hygrograph of high reliability that can be regularly.
Background technology
The humiture registering instrument is a kind of miniature surveying instrument, can timing automatic write down the temperature that test environment is introduced, humidity, and store measurement result, by being connected, can analyze measurement data with computing machine.Because this instrument need not manual intervention, can also be applied to the environment that some manually can't be monitored, as occasions such as air-conditioning system debugging, dryings.The testing result of preserving is transferred in the continuous computing machine accurately, is very important with the data analysis that realizes the later stage.Along with the decline of cost of memory and enriching of product category, jumbo nonvolatile memory begins to be used widely gradually.Like this, the thing followed is the increase of transmission time and data, and the power consumption of humiture registering instrument of the prior art is all bigger, and transfer rate is also slow, and is therefore, very disadvantageous during to the long-time use of registering instrument.In addition, existing recorded instrument great majority adopt analog Temperature Humidity Sensor, like this, need or increase analog to digital conversion circuit in circuit in the processor part, have increased the power consumption of system; Below all can make shortening greatly these service time for battery in this battery responsive type of the registering instrument equipment.
Summary of the invention
The objective of the invention is to remedy weak point of the prior art, provide a kind of easy to connect, the humiture registering instrument that capacity is big, measuring accuracy is high, low in energy consumption with computer.
Technical scheme: a kind of low-power consumption humiture registering instrument is provided.Described a kind of low-power consumption humiture registering instrument comprises microcontroller U1, some external storages, Temperature Humidity Sensor SENSOR1, universal serial port bus chip U6 and universal serial port interface J1.
Described microcontroller U1 is connected with Temperature Humidity Sensor SENSOR1 and external memory storage by the I/O mouth, and described universal serial port interface J1 is connected with microcontroller U1 by universal serial port bus chip U6.
Wherein, described microcontroller U1 adopts the MSP430F437 chip, and the DATA pin of described Temperature Humidity Sensor SENSOR1 is connected with 56 pin of microcontroller U1, and is connected with 62 pin of microcontroller U1 by first resistance R 1; The SCK pin of described Temperature Humidity Sensor SENSOR1 is connected with 61 pin of microcontroller U1; The VDD pin of described Temperature Humidity Sensor SENSOR1 is connected with 62 pin of microcontroller U1.
The TXD pin of described universal serial port bus chip U6 is connected with 53,55 pin of microcontroller U1 respectively,
The RXD pin of described universal serial port bus chip U6 is connected with 54 pin of microcontroller U1.
The VCUS pin of described universal serial port interface J1 is connected with REGIN, the VBUS pin of universal serial port bus chip U6 respectively; The D-pin of described universal serial port interface J1 is connected with the D-pin of universal serial port bus chip U6; The D+ pin of described universal serial port interface J1 is connected with the D+ pin of universal serial port bus chip U6.
Technique effect: microcontroller is connected with Temperature Humidity Sensor and external memory storage by common I/O mouth, level height by control I/O mouth, clock signal to two device operations is provided, realizes temperature and humidity measurement, in the moment that provides measurement data is deposited in the external memory device simultaneously.During practical application, by usb transmission chip interface this registering instrument and computing machine are coupled together, by the VC program on the host computer to registering instrument parameter (system clock, writing time at interval and the opening entry mode) (PC communicates with single-chip microcomputer by VC control) is set, wherein the mode of registering instrument open record has three kinds: the current time opens, sampling time, measurement are in real time opened, are provided with to certain time in the future.After setting is finished, registering instrument is disconnected connection with computing machine, registering instrument can begin to measure and record humiture data according to the open mode that sets in advance.DATA REASONING is fetched registering instrument and is reconnected with PC after finishing, and the humiture data that write down among the EEPROM can be derived by the VC program on the PC and form Excel form and data and curves, so that analyzing and processing.
Description of drawings
The circuit diagram of a kind of low-power consumption humiture of Fig. 1 specific embodiment of the invention registering instrument.
Embodiment
The present invention is described in detail below in conjunction with drawings and Examples.
With reference to Fig. 1, the humiture registering instrument in the present embodiment mainly comprises microcontroller U1, nonvolatile memory U2, U3, U4, U5, universal serial port bus chip U6, universal serial port interface J1, Temperature Humidity Sensor module SENSOR1.
Wherein, microcontroller adopts the low-power scm of TI company, and this chip is travel direction control I/O pin separately, has the A/D converter of 12 bit resolutions.Can move under the doubleclocking pattern, external crystal oscillator adopts the 32.768kHz crystal oscillator, for system provides accurate real-time clock.This kind single-chip microcomputer has the super low-power consumption arousal function, has enhancement mode USART module, can realize that serial ports wakes device automatically up, thereby make things convenient for the low power dissipation design of realization system.
Sensor assembly adopts the SHT1X type digital transducer of auspicious benefactor of flourishing age department.SHT1X is single chip integrated digital hygro sensor, and the conditioning of all signals is all finished at chip internal, adopts the 1C bus to realize communication, finishes the transmission of data and clock, and directly exports digital signal.This sensor temperature measurement has 14bit resolution, and relative humidity has the resolution of 12bit.So not only save the I/O mouth line of single-chip microcomputer, and reduced the A/D device, reduced cost.MSP430F435 is connected with SHT11, only need with 2 I/O mouth lines respectively as data line DATA and clock line SCK, and go into 1 pull-up resistor in the DATA termination, the while is gone into 1 decoupling capacitor at VDD and GND termination, by design of software corresponding, can finish the collection and the transmission of data.
The external memory storage of image data is the 24LC512 type of Microchip company, and this chip is supported 2 line serial line interfaces, can store maximum 64K data, and memory space is big.Because the storage and measurement data be not synchronous, EEPROM can with the shared SCK pin of sensor, select I/O mouth of single-chip microcomputer to do DATA～I pin in addition, this pin will connect equally and draw resistance.
That universal serial port bus is sampled is CP2103, and it is that the integrated USB of a kind of height changes the UART bridge, provides one to use minimized element and PCB space to realize that RS232 changes the easy solution of USB.This chip comprises a USB 2.0 function control device at full speed, the USB transceiver, and oscillator and the asynchronous serial data bus (UART) that has whole modem control signals, repertoire is integrated in the IC of a 5mm X5mm MLP-28 encapsulation.In need not other external USB element.EEPROM can be used for the storage space by data such as the self-defined USB vendor code of original equipment manufacturer, product code, product description literal, power label, version number and device serial number in the sheet.
EEPROM can programme on the application plate by USB, and this makes just can realize it is programmed in product manufacturing and debug process.The device driver of using CYGNAL to provide free can be used to CP2101 to realize an effective com port at an easy rate.
Tax-free practical com port (VCP) device driver that Cygnal provides allows one to use based on the product of a CP2101 com port as PC.So handling all RS232 signals, the UART interface of CP2101 comprises that control and the existing system firmware of handshake need not to change.In many existing RS232 designs, what renewal will be done from RS232 to USB is exactly to replace other converter of RS232 level with CP2101.The principle of parts selection is to reduce power consumption under the prerequisite of the function of the system of realization as far as possible, reduces the volume of registering instrument.The frequency of operation of single-chip microcomputer is very big to the influence of power consumption, and frequency is high more, and power consumption is big more.The exemplary operation electric current of msp430 series monolithic has only 15 μ A when adopting 32kHz crystal oscillator, 3V operating voltage, uses the external crystal oscillator of 32.768kHz, for system provides real-time clock, greatly reduces the power consumption of system under park mode.
With reference to Fig. 1, present embodiment: system is powered by the 3V button cell, by the MSP430F435 single-chip microcomputer data conversion of Temperature Humidity Sensor collection is read and stored in the middle of the EEPROM, write current Measuring Time simultaneously, write down current humiture data, realized the requirement of real time record,, shown the humiture change curve when can sense data when computer connects by upper computer software.Realized that volume is little, low-power consumption, high precision, the long-time measurement, 2 years serviceable life of typical case.
Above content be in conjunction with optimal technical scheme to further describing that the present invention did, can not assert that the concrete enforcement of invention only limits to these explanations.Concerning the general technical staff of the technical field of the invention, under the prerequisite that does not break away from design of the present invention, can also make simple deduction and replacement, all should be considered as protection scope of the present invention.
Claims (2)
1. a low-power consumption humiture registering instrument is characterized in that, described low-power consumption humiture registering instrument comprises microcontroller (U1), some external storages, Temperature Humidity Sensor (SENSOR1), universal serial port bus chip (U6) and universal serial port interface (J1);
Described microcontroller (U1) is connected with Temperature Humidity Sensor (SENSOR1) and external memory storage by the I/O mouth, and described universal serial port interface (J1) is connected with microcontroller (U1) by universal serial port bus chip (U6).
2. a kind of low-power consumption humiture registering instrument according to claim 1, it is characterized in that, described microcontroller (U1) adopts the MSP430F437 chip, the DATA pin of described Temperature Humidity Sensor (SENSOR1) is connected with 56 pin of microcontroller (U1), and is connected with 62 pin of microcontroller (U1) by first resistance (R1); The SCK pin of described Temperature Humidity Sensor (SENSOR1) is connected with 61 pin of microcontroller (U1); The VDD pin of described Temperature Humidity Sensor (SENSOR1) is connected with 62 pin of microcontroller (U1);
The TXD pin of described universal serial port bus chip (U6) is connected with 53,55 pin of microcontroller (U1) respectively, and the RXD pin of described universal serial port bus chip (U6) is connected with 54 pin of microcontroller (U1);
The VCUS pin of described universal serial port interface (J1) is connected with REGIN, the VBUS pin of universal serial port bus chip (U6) respectively; The D-pin of described universal serial port interface (J1) is connected with the D-pin of universal serial port bus chip (U6); The D+ pin of described universal serial port interface (J1) is connected with the D+ pin of universal serial port bus chip (U6).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201110180576A CN102279011A (en) | 2011-06-30 | 2011-06-30 | Temperature-humidity recorder with low power consumption |
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| CN201110180576A CN102279011A (en) | 2011-06-30 | 2011-06-30 | Temperature-humidity recorder with low power consumption |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102521422A (en) * | 2011-12-15 | 2012-06-27 | 复旦大学 | Temperature acquiring system based on USB (universal serial bus) storage equipment |
| CN116996764A (en) * | 2023-09-26 | 2023-11-03 | 深圳市华图测控系统有限公司 | Dynamic energy-saving method and equipment for intelligent multifunctional wireless recorder system |
-
2011
- 2011-06-30 CN CN201110180576A patent/CN102279011A/en active Pending
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102521422A (en) * | 2011-12-15 | 2012-06-27 | 复旦大学 | Temperature acquiring system based on USB (universal serial bus) storage equipment |
| CN116996764A (en) * | 2023-09-26 | 2023-11-03 | 深圳市华图测控系统有限公司 | Dynamic energy-saving method and equipment for intelligent multifunctional wireless recorder system |
| CN116996764B (en) * | 2023-09-26 | 2024-02-13 | 深圳市华图测控系统有限公司 | Dynamic energy-saving method and equipment for intelligent multifunctional wireless recorder system |
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Application publication date: 20111214 |