CN2370428Y - Comprehensive detector for temperature, humidity and illuminance - Google Patents
Comprehensive detector for temperature, humidity and illuminance Download PDFInfo
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- CN2370428Y CN2370428Y CN99235966U CN99235966U CN2370428Y CN 2370428 Y CN2370428 Y CN 2370428Y CN 99235966 U CN99235966 U CN 99235966U CN 99235966 U CN99235966 U CN 99235966U CN 2370428 Y CN2370428 Y CN 2370428Y
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Abstract
The utility model relates to a comprehensive detector for temperature, humidity and illuminance, which is composed of a humidity sensor, an illuminance sensor, an A/D converter, a temperature sensor, an address switch, a display, and an SCM. The humidity sensor is composed of the sequential connection of an oscillator, a monostable circuit, an integrating circuit, a DC amplifier. The illuminance sensor is composed of the sequential connection of a photosensitive element, and an I/V converter. The humidity sensor and the illuminance sensor are respectively connected with the A/D converter, and the A/D converter, the temperature sensor, the address switch and the display are respectively connected with the SCM. In order to realize the remote data communication, the SCM can be also connected with a communication device.
Description
The utility model relates to the pick-up unit of temperature, humidity and the illuminance of environment such as being used to measure plant or vegetables culturing room, laboratory, warehouse, office, relates to finish temperature, humidity and illuminance simultaneously with an instrument in more detail and detects.
The detection of existing temperature, humidity and illuminance all is manually to measure each parameter respectively, measures the thermometer that temperature adopts mercury thermometer or made by thermistor or integrated thermosensitive device (AD590); Measure the humidity measuring instrument that humidity adopts hair hygrometer, psychrometer and humicap sensing; Measuring light illumination adopts the illumination meter of light-sensitive cell as sensor; Also have and measure temperature and humidity instrument simultaneously.Its shortcoming is: 1, adopts and manually measures temperature, humidity, illuminance respectively, and more loaded down with trivial details; 2, can only obtain image data in the scene, can not realize remote data communication.
The purpose of this utility model is the shortcoming at prior art, and a kind of temperature, humidity and illuminance comprehensive detection device are provided, and can detect simultaneously and displays temperature, humidity and illuminance.
The purpose of this utility model also is the shortcoming at prior art, and a kind of temperature, humidity and illuminance comprehensive detection device are provided, and can detect simultaneously and displays temperature, humidity and illuminance, can also realize remote data communication.
Temperature of the present utility model, humidity and illuminance comprehensive detection device are made of humidity sensor, illuminance transducer, A/D transducer, temperature sensor, address switch, display, single-chip microcomputer; Humidity sensor is connected and composed successively by oscillator, monostable circuit, integrating circuit, direct current amplifier; Illuminance transducer is connected and composed successively by light activated element, I/V transducer; Humidity sensor is connected with the A/D transducer respectively with illuminance transducer, and A/D transducer, temperature sensor, address switch, display are connected with single-chip microcomputer respectively.
Solidified the program of supporting full machine operation in the single-chip microcomputer.
Humidity sensor, illuminance transducer, temperature sensor are used for temperature, humidity, the brightness value of measurement environment, because humidity and the brightness value measured are analog quantitys, therefore needing the A/D transducer is digital signal with analog-signal transitions.
Display can be existing general display, as digital tube display, LCD, is used for displays temperature value, humidity value.
Address switch is used to read in switch value, if this switch value zero, then it goes without doing station address, and as the debugging mode operation, when non-zero just as effective address.
In order to realize remote data communication, this single-chip microcomputer can also connect a communicator, is used for accepting and transmitting data, can adopt the communicator of models such as RS-232, RS-485, RS-422.
During use, the utility model device can use separately also can networking operation.When using separately, feed and exchange (or direct current) 14-20V voltage, device starts automatically, repeat successively displays temperature value under P sign (degree centigrade), under the H sign, show humidity value (%RH), be illuminance value (4 bit digital then, actual value is that display digit takes advantage of 10, the LUX of unit).As networking operation, at first dial and decide unit address with address switch, communicator output end of main by device connects with bus then.
This shows that the utility model is to be the intelligent measurement instrument of core with the one-chip computer.It has adopted integrated digital type temperature sensor to measure temperature as temp probe; Adopt humicap as humidity sensitive device measures ambient humidity; Adopting light-sensitive cell is the sensor of illuminance, the brightness value of measuring light; This device is under Single-chip Controlling, the temperature of difference measurement environment, humidity and illumination value, and (for example temperature, humidity are 2 bit digital to provide the numeral demonstration, illumination is 4 bit digital), and device design has standard serial communicator bus interface and address configuration switch, can with the host computer communication with similar bus.The combinational circuit design that the utility model device has adopted succinct novelty has reliably realized the conversion of parameter accurately, and digital filtering is handled, serial output Pagination Display.
The utility model compared with prior art has following advantage:
1, the utility model adopts single-chip microcomputer to cooperate miscellaneous part to detect simultaneously and temperature, humidity, the illuminance of display environment, has save manually-operated numerous and diverse step;
2, the utility model needn't manually arrive the collection in worksite data owing to adopted communicator to realize remote data communication;
3, the utility model cost is relatively low, and wide adaptive capacity to environment (wide temperature, humidity, illuminance scope) is arranged.
Fig. 1 is the block diagram of temperature of the present utility model, humidity and illuminance comprehensive detection device;
Fig. 2 is another block diagram of temperature of the present utility model, humidity and illuminance comprehensive detection device;
Fig. 3 is a shape assumption diagram of temperature of the present utility model, humidity and illuminance comprehensive detection device;
Fig. 4 is the circuit diagram of temperature of the present utility model, humidity and illuminance comprehensive detection device.
Below by embodiment the utility model is further described.
Embodiment
As shown in Figure 1, temperature of the present utility model, humidity and illuminance comprehensive detection device are made of humidity sensor 1, illuminance transducer 2, A/D transducer 3, temperature sensor 4, address switch 5, display 6, single-chip microcomputer 7; Humidity sensor 1 is connected and composed successively by oscillator 1 (1), monostable circuit 1 (2), integrating circuit 1 (3), direct current amplifier 1 (4); Illuminance transducer 2 is connected and composed successively by light activated element 2 (1), I/V transducer 2 (2); Humidity sensor 1 is connected with A/D transducer 3 respectively with illuminance transducer 2, and A/D transducer 3, temperature sensor 4, address switch 5, display 6 are connected with single-chip microcomputer 7 respectively.
As shown in Figure 2, temperature of the present utility model, humidity and illuminance comprehensive detection device can also be made of humidity sensor 1, illuminance transducer 2, A/D transducer 3, temperature sensor 4, address switch 5, display 6, single-chip microcomputer 7, communicator 8; Humidity sensor 1 is connected and composed successively by oscillator 1 (1), monostable circuit 1 (2), integrating circuit 1 (3), direct current amplifier 1 (4); Illuminance transducer 2 is connected and composed successively by light activated element 2 (1), I/V transducer 2 (2); Humidity sensor 1 is connected with A/D transducer 3 respectively with illuminance transducer 2, and A/D transducer 3, temperature sensor 4, address switch 5, display 6, communicator 8 are connected with single-chip microcomputer 7 respectively.
The I/V transducer 2 of humidity sensor 1, illuminance transducer 2 has been installed in the cabinet 9 as shown in Figure 3,
(2), A/D transducer 3, temperature sensor 4, address switch 5, display 6, single-chip microcomputer 7, communicator 8; Be connected with the light activated element 2 (1) of illuminance transducer 2 by lead 10, light activated element 2 (1) is supported by shelf 11.
Can understand the object lesson of present embodiment device and each parts thereof in conjunction with Fig. 2 and Fig. 4.
Humidity sensor 1: the sensitive element of selecting for use is humicap CRH, and circuit structure divides following each several part:
Oscillator 1 (1):, therefore all adopt low-voltage 2.66V power supply when being higher than 3V with close-connected each circuit of humicap CRH (1) and (2) because of humicap is easy to puncture.Pierce circuit is C13 wherein, R13, and R15 determines oscillation frequency, the design's oscillation frequency is 125KHZ.Waveform is a square wave.
Monostable circuit 1 (2): the square wave from 1 (1) is through C15, the R7 differential, form trigger pulse, monostable circuit also is made of TLC555CP, when trigger pulse changes the monostable circuit triggering over to temporary stable state, hold time and then determine, and CRH is relevant with ambient humidity, utilizes this principle to constitute monostable pulse width modulated function by humicap CRH.The humicap of 50-60PF is selected in design for use, and the humidity rate of change is 0.13PF/1%RH, gets 20K as R10, and relative humidity is by 0-100%RH, and pulse width will change 0.26 microsecond.
Integrating circuit 1 (3): monostable trigger pulse is sent into by R20, the integrating circuit that R21 and C17 constitute, the time constant of this circuit is much larger than the cycle of monostable pulse, so integrating circuit is output as burning voltage, and its amplitude is relevant with pulsewidth.When the parameter humidity of this circuit 1 (2), 1 (3) design expires Cheng Bianhua, cause that integral voltage changes 86mv..
Direct current amplifier 1 (4): the voltage of 86 millivolts of amplitudes of variation is carried out the A/D conversion reflect that humidity value obviously too little (general A/D input voltage is 0-5V) therefore need amplify, this example is selected direct current amplifier 1 (4) LM358 for use, and be furnished with zero point and regulate and multiplying power regulator potentiometer W1 W2.This amplifier multiple can be regulated between 5-50 times, approximately is used for about 24 times in this instrument.
Illuminance transducer 2:
Light activated element 2 (1): this routine light activated element adopts 1 square millimeter silicon photocell, it can be operated in 0.45-0.57um visible light wave range scope, its light characteristics is: open-circuit voltage and illuminance are non-linear, and its short-circuit current is linear with illuminance in a big way, and the design is about to short-circuit current and is used as the illumination electric parameter and measures.In order to reduce the influence of directivity to reading, photosensitive device is placed in the circular arc outer cover, the about 20mm of arc radius.
I/V transducer 2 (2): when electric current is measured as reflection illuminance parameter, voltage need be converted into and just the A/D conversion can be carried out, obtain measured value, therefore introduce I/V transducer 2 (2), it is made of operational amplifier LM358, and the potential difference (PD) of the out-phase input end of operational amplifier is approximately zero, and available this characteristic is connected into the virtual short sample circuit with photoelectric cell, its output voltage is directly proportional with photocurrent, has finished the I/V conversion.For obtaining the change in voltage scope that the A/D conversion requires, W3 realizes the multiplying power adjusting.Connection terminal JP1, JP2, the suitable selection of JP3 is drawn access A/D conversion, the application in the time of also can being used for other parameter measurements to humidity and illuminance.
A/D transducer 3: the TLC2543C that this example selects for use TI company to produce, it is 12 bit switch gradually-appoximant analog-digital converters, it has 11 input channels, can sequentially carry out the A/D conversion to 11 input analog amounts, adopted serial i/O mode, promptly be provided with one digit number according to output terminal, one digit number is according to an input end and a bit clock, the serial of conversion control word can be imported (order input), can be after finishing the A/D conversion with the resultant string line output.Because humidity and light exposure measurement are to obtain analog quantity, are transformed to numeral and have selected the two-way among the TLC2543C for use.The 10# passage is selected in the humidity conversion, and the 9# passage is selected in the illuminance conversion for use.
P15 CS, P16 DATAOUT, P17 DATAIN, P18 I/OCLOCK is then supported by single-chip microcomputer 7.Solidification software supports above-mentioned each end to finish Input Control Word in single-chip microcomputer 7, and A/D transducer 3 starts operations such as output transform result.TLC2543C adopts 8 control words, passage determine that the transformation results position is long selected, data layout is all finished by Input Control Word.
Temperature sensor 4: it is the integrated temperature element that the nineties, U.S. DALLAS company produced that this example adopts model DS1820, it has only 3 lead end (+5V, ground, signal end) communicates with the external world with a signal wire behind the place in circuit, accept external command, finish corresponding thermometric conversion, read an operation such as temperature value.Temperature sensor 4 is connected with single-chip microcomputer signals of 7 usefulness (P3.7), in single-chip microcomputer 7, solidified interface routine with DS1820, control temperature sensor 4 is finished the thermometric conversion, read the temperature value operations, after operations was finished, temperature value was stored in the storer of single-chip microcomputer 7, was shown by display 6 again, or carry out remote digital communication by communicator 8, reach other instrument or computing machine.
Address switch 5: totally 5 of the address switches that present embodiment is selected for use, directly read the P1 mouth and can read in switch value.If this switch value zero, then it goes without doing station address, and as the debugging mode operation, when non-zero just as effective address.
Display 6: this example is selected 4 (decimal system) digital demonstration for use.Use static display mode, formed 32 bit shift register by 4 74HC164 and supported 4 LED charactron data presentation of sun altogether, constitute well-regulated data presentation chain, drive end is two I/O only, expand to show that chain does not increase drive end yet.2 I/O P1.5 of single-chip microcomputer 7 usefulness, P1.6 supports this demonstration.Solidify display driving software in the single-chip microcomputer, be used for number of support according to the show.
Single-chip microcomputer 7: select AT89C2051 (hereinafter to be referred as 2051) for use, it is the version of reducing the staff of MCS-51, and gets the DIP20 encapsulation, outside just I/O reduces, order set, interrupt structure, run timing, RAM capacity are all identical with MCS-51, and internal program memory is reduced to the 2K byte by the 4K byte.
The single-chip microcomputer hardware components: 2051 power supply meets P20 VCC and P10 GND.P4 XTAL1, P5XTAL2 meet oscillating crystal and capacitor C 20 and C21, and it is 18.432MHZ that this device is selected crystal oscillation frequency for use, and the clock period is 0.0542us, and the instruction cycle is 0.65us.The reset circuit of this machine does not adopt common R-C mode, and has adopted the special chip MAX810 that resets of MAXIM company fresh product, and this chip can produce the positive reset pulse of about 240ms automatically when powering on, and makes reset start-up routine operation of single-chip microcomputer.And also can produce reset pulse during of short duration beating because of loose contact causes at power supply and prevented the deadlock phenomenon that therefore occurs.
P1.7-P1.0 is 8 P1 interfaces, and P3.7-P3.0 is 7 (few P3.6) P3 interfaces, carries out the I/O operation.
Each I/O port is finished following function:
AP1.4, P1.3, P1.2, P1.1, P1.0 read in the address switch value, determine the station address of this machine in communication network.32 addresses can be set in totally 5 of addresses, but No. zero address is as station address, only as the test sign of this machine.The address that switch is set is first address, is used for transmitting temperature and humidity value to host computer, and first cyclic address change fixed increment (being finished by software) is used for transmitting illuminance to host computer for second address of this device.
BP3.7 and temperature sensor 4 join, and finish temperature measuring, and temperature value is read in single-chip microcomputer 7 internal memories.
CP3.3, P3.2, P1.6, P1.5 is connected with A/D transducer 3, supports the A/D map function of full machine, and humidity value and the illumination value that quantizes read in the single-chip microcomputer internal memory, further does data processing.
DP3.5, P3.4 is connected with display 6, provides temperature, humidity, the numeral of illuminance shows.
EP3.1, P3.0, P1.7 then are used for data communication equipment 8.P3.1 is serial data output, and P3.0 is the serial data input, and P1.7 then serves as transmission/reception conversion.Communication is adopted and is driven special chip 75176, and communication standard meets the RS-485 standard.
In AT89C2051, solidified the program of supporting full machine operation.For supporting the main flow operation, be equipped with following modules.
The A initialization:
Put each I/O port initial condition;
Initial value is put in all RAM zero clearings;
This machine of setting address;
Put each special register initial value;
Interrupt setting.
The B numeral shows support program:
Scale-of-two changes binary-coded decimal;
Segment encode is tabled look-up;
Driven in series;
C digital communication support program:
Interrupt the reception program;
The address is differentiated;
Data send.
The support program of D thermometric program:
The DS1820 command list;
The DS1820 reader;
DS1820 writes a program.
EA/D conversion support program:
The TLC2543C initialize routine;
TLC2543C serial read/write procedure.
The F software application:
Soft delay routine is delayed to 1ms 2ms 20ms 1s;
Measure the digital filter program of humidity;
Measure humidity and adjust program zero point;
Measure the integrator of illuminance.
Primary power: primary power is by rectification, and filtering and voltage stabilizing each several part are formed.Output 5V 200MA, 12V50MA, input direct current or interchange 14-20 volt, direct current inserts also nonpolarity qualification, and this device is suitable for the low-tension supply group net operation, is the desirable front end instrument of multi-point sampler network.
Accessory power supply: accessory power supply is told from 12 volts, provides following two groups: (1) supports 1 (1), 1 (2) 2.66V; (2) be used for the reference power source VREF of A/D transducer 3, the design VREF is 4.8V, has high degree of stability.
This device can use separately also can networking operation.When using separately, feed and exchange (or direct current) 14-20V voltage, device starts automatically, repeat successively displays temperature value under P sign (degree centigrade), under the H sign, show humidity value (%RH), be illuminance value (4 bit digital then, actual value is that display digit takes advantage of 10, the LUX of unit).As networking operation, at first dial and decide unit address with address switch, communicator output end of main by device connects with bus then.
This device is applicable to the parameter area of broad, is specially adapted in the computer monitoring system system of agricultural greenhouse booth environment, also is applicable to other environmental monitoring (control) system.This example is used for flower shed computer automatic monitoring network system, and ruuning situation is good.
Claims (2)
1, a kind of temperature, humidity and illuminance comprehensive detection device, it is characterized in that being made of humidity sensor, illuminance transducer, A/D transducer, temperature sensor, address switch, display, single-chip microcomputer, humidity sensor is connected and composed successively by oscillator, monostable circuit, integrating circuit, direct current amplifier; Illuminance transducer is connected and composed successively by light activated element, I/V transducer, and humidity sensor is connected with the A/D transducer respectively with illuminance transducer, and A/D transducer, temperature sensor, address switch, display are connected with single-chip microcomputer respectively.
2, a kind of temperature, humidity and illuminance comprehensive detection device, it is characterized in that by humidity sensor, illuminance transducer, the A/D transducer, temperature sensor, address switch, display, single-chip microcomputer, communicator constitutes, humidity sensor is by oscillator, monostable circuit, integrating circuit, direct current amplifier connects and composes successively, illuminance transducer is by light activated element, the I/V transducer connects and composes successively, humidity sensor is connected the A/D transducer respectively with illuminance transducer with the A/D transducer, temperature sensor, address switch, display, communicator is connected with single-chip microcomputer respectively.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99235966U CN2370428Y (en) | 1999-05-07 | 1999-05-07 | Comprehensive detector for temperature, humidity and illuminance |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN99235966U CN2370428Y (en) | 1999-05-07 | 1999-05-07 | Comprehensive detector for temperature, humidity and illuminance |
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| CN2370428Y true CN2370428Y (en) | 2000-03-22 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN99235966U Expired - Fee Related CN2370428Y (en) | 1999-05-07 | 1999-05-07 | Comprehensive detector for temperature, humidity and illuminance |
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Cited By (9)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7132596B2 (en) | 2003-06-06 | 2006-11-07 | Mitsubishi Denki Kabushiki Kaisha | Automatic music selecting system in mobile unit |
| CN1306252C (en) * | 2004-08-13 | 2007-03-21 | 华南师范大学 | Intelligent light intensity, temperature and humidity measuring instrument |
| CN100465976C (en) * | 2003-08-06 | 2009-03-04 | 水星传感器公司 | Universal sensor adapter |
| CN101080631B (en) * | 2004-12-17 | 2012-03-28 | 德尔塔-T设备有限公司 | Moisture content sensor and related methods |
| CN103177668A (en) * | 2013-03-05 | 2013-06-26 | 四川省电力公司达州电业局 | Liquid crystal display (LCD) device for warehouse management |
| CN103984270A (en) * | 2014-05-29 | 2014-08-13 | 苏州南斗专利服务有限公司 | Light collection system |
| CN105157826A (en) * | 2015-07-21 | 2015-12-16 | 俞凤翔 | Multifunctional illuminometer |
| CN105157823A (en) * | 2015-07-21 | 2015-12-16 | 俞凤翔 | Illuminometer |
| CN105157825A (en) * | 2015-07-21 | 2015-12-16 | 俞凤翔 | Illuminometer |
-
1999
- 1999-05-07 CN CN99235966U patent/CN2370428Y/en not_active Expired - Fee Related
Cited By (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US7132596B2 (en) | 2003-06-06 | 2006-11-07 | Mitsubishi Denki Kabushiki Kaisha | Automatic music selecting system in mobile unit |
| CN100394425C (en) * | 2003-06-06 | 2008-06-11 | 三菱电机株式会社 | Automatic music selecting system in mobile unit |
| CN100465976C (en) * | 2003-08-06 | 2009-03-04 | 水星传感器公司 | Universal sensor adapter |
| CN1306252C (en) * | 2004-08-13 | 2007-03-21 | 华南师范大学 | Intelligent light intensity, temperature and humidity measuring instrument |
| CN101080631B (en) * | 2004-12-17 | 2012-03-28 | 德尔塔-T设备有限公司 | Moisture content sensor and related methods |
| CN103177668A (en) * | 2013-03-05 | 2013-06-26 | 四川省电力公司达州电业局 | Liquid crystal display (LCD) device for warehouse management |
| CN103984270A (en) * | 2014-05-29 | 2014-08-13 | 苏州南斗专利服务有限公司 | Light collection system |
| CN105157826A (en) * | 2015-07-21 | 2015-12-16 | 俞凤翔 | Multifunctional illuminometer |
| CN105157823A (en) * | 2015-07-21 | 2015-12-16 | 俞凤翔 | Illuminometer |
| CN105157825A (en) * | 2015-07-21 | 2015-12-16 | 俞凤翔 | Illuminometer |
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| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |