CN203535468U - Detector for temperature and humidity controller - Google Patents
Detector for temperature and humidity controller Download PDFInfo
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- CN203535468U CN203535468U CN201320587833.3U CN201320587833U CN203535468U CN 203535468 U CN203535468 U CN 203535468U CN 201320587833 U CN201320587833 U CN 201320587833U CN 203535468 U CN203535468 U CN 203535468U
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- temperature
- humidity
- humidity controller
- display module
- collection circuit
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Abstract
The utility model provides a detector for a temperature and humidity controller. The detector for the temperature and humidity controller comprises the temperature and humidity controller, a rheostat, display modules and temperature and humidity collection circuits, wherein the display modules comprise a temperature display module and a humidity display module; the temperature display module and the humidity display module are connected to the temperature and humidity controller through the rheostat; and the temperature and humidity collection circuits are connected to the temperature and humidity controller. The detector for the temperature and humidity controller is simple in structure, convenient to operate, and capable of achieving higher precision by programming. By the utilization of a simple principle, a method which is the most convenient to implement is provided for detecting the temperature and humidity controller.
Description
Technical field: the utility model provides a kind of temperature and humidity controller detector.
Background technology: in the mankind's living environment, temperature, humidity are being played the part of extremely important role.No matter where you live in, and are engaged in what work, are not beating dealings with temperature, humidity all the time.Since the industrial revolution of 18th century, industrial development to whether grasping temperature, humidity has absolute contact.In electric power, metallurgy, iron and steel, petrochemical industry, cement, glass, medicine etc. industry, can say that almost 80% industrial sector all has to considering factor warm, humidity.Temperature, humidity is so important for industry, advanced thus the development of temperature, humidity sensor.Enter after 21 century, temperature, humidity sensor just develop rapidly towards high-tech directions such as high precision, multi-functional, bus standard, high reliability and security, development of virtual sensor and network sensor, development monolithic temp measuring systems.
Since temperature, humidity controller have vital role like this, known its can just seem more crucial by reliably working.
Utility model content:
Utility model object: the utility model provides a kind of temperature and humidity controller detector, its objective is the not good problem of the existing course of work reliability of solution equipment in the past.
Technical scheme: the utility model is achieved through the following technical solutions:
A temperature and humidity controller detector, is characterized in that: this detector comprises temperature and humidity controller, rheostat, display module and humiture collection circuit; Display module is divided into temperature display module and humidity display module, and temperature display module and humidity display module are all connected to temperature and humidity controller by rheostat, and humiture collection circuit is connected to temperature and humidity controller.
Humiture collection circuit is divided into temperature collection circuit and humidity collection circuit; Temperature collection circuit is connected to temperature and humidity controller by rheostat, and temperature and humidity controller connects temperature display module by rheostat; Humidity collection circuit is connected to temperature and humidity controller by rheostat, and temperature and humidity controller is connected to humidity display module by rheostat.
Temperature collection circuit is temperature sensor or temp probe; Humidity collection circuit is humidity sensor or moisture probe.
Temperature and humidity controller consists of single-chip microcomputer, in this single-chip microcomputer, be provided with A/D modular converter and humiture and calculate module, humiture is calculated module and is comprised temperature computation module and humidity computing module, and temperature sensor is connected to A/D modular converter, and temperature display module connects temperature computation module; Humidity sensor connects A/D modular converter, and humidity display module connects humidity computing module.
Advantage and effect: the utility model provides a kind of temperature and humidity controller detector, this detector comprises temperature and humidity controller, rheostat, display module and humiture collection circuit; Display module is divided into temperature display module and humidity display module, and temperature display module and humidity display module are all connected to temperature and humidity controller by rheostat, and humiture collection circuit is connected to temperature and humidity controller.
Due to scientific and technical develop rapidly, microelectronic processing technique particularly, the development of computer technology and the information processing technology, people are growing to the demand of information resources, as providing sensing technology and the sensor of information more and more to cause people's attention, and the sensor technology of comprehensive various technology also enters into a developing stage at full speed.To correctly obtain in time various information, solve the various concrete inspection problem running in engineering, production and scientific research, just must choose reasonable be good at applying various sensors and sensing technology.As the measurement of simple temperature, there are thermopair, fibre optic temperature sensor etc.But, thermistor be exploitation early, kind is many, development the is more ripe first device of sensitivity.Thermistor is comprised of semiconductor ceramic material, and the principle of utilization is that temperature causes resistance variations.Thermal resistor is a class of sensitive element, according to temperature coefficient difference, is divided into positive temperature coefficient thermistor (PTC) and negative temperature coefficient thermistor (NTC).The typical feature of thermal resistor is to responsive to temperature, shows different resistance values at different temperature.Positive temperature coefficient thermistor (PTC) resistance value when temperature is higher is larger, and negative temperature coefficient thermistor (NTC) resistance value when temperature is higher is lower, and they belong to semiconductor devices.Along with the development of semiconductor technology, thermistor is more and more extensive as a kind of Novel temperature sensing element application.He has that volume is little, highly sensitive, lightweight, thermal inertia is little, the life-span is long and the advantage such as low price, the most important thing is as the sensitivity of the thermistor of temperature sensor very highly, and this is that other temperature probes can not be compared.
The utlity model has following functions:
1. basic function
1) test temperature and humidity controller startup, return to temperature and humidity value;
2) test site standard temperature, humidity value at that time;
3) sensor test carrying by temperature and humidity controller is temperature, humidity value at that time;
4) use digital display tube to show above numerical value;
5) the self-contained power supply of detector;
2. the scope of application
Temperature-measuring range is-40-70 ℃; Humidity range is 10%-100%
Temperature measurement error < ± 1 ℃; Humidity error < ± 3%
Accompanying drawing explanation:
Fig. 1 is structured flowchart of the present utility model;
Fig. 2 is the schematic diagram of single chip part of the present utility model;
Fig. 3 is thermistor temp family curve of the present utility model;
Fig. 4 is power circuit diagram of the present utility model;
Fig. 5 is single-chip minimum system figure of the present utility model;
Fig. 6 is display system circuit diagram of the present utility model
Embodiment: the utility model is described further below in conjunction with accompanying drawing:
As shown in Figure 1, the utility model provides a kind of temperature and humidity controller detector, and this detector comprises temperature and humidity controller, rheostat, display module and humiture collection circuit; Display module is divided into temperature display module and humidity display module, and temperature display module and humidity display module are all connected to temperature and humidity controller by rheostat, and humiture collection circuit is connected to temperature and humidity controller.Humiture collection circuit is divided into temperature collection circuit and humidity collection circuit; Temperature collection circuit is connected to temperature and humidity controller by rheostat, and temperature and humidity controller connects temperature display module by rheostat; Humidity collection circuit is connected to temperature and humidity controller by rheostat, and temperature and humidity controller is connected to humidity display module by rheostat.
Temperature collection circuit is temperature sensor or temp probe; Humidity collection circuit is humidity sensor or moisture probe.
Temperature and humidity controller consists of single-chip microcomputer, in this single-chip microcomputer, be provided with A/D modular converter and humiture and calculate module, humiture is calculated module and is comprised temperature computation module and humidity computing module, and temperature sensor is connected to A/D modular converter, and temperature display module connects temperature computation module; Humidity sensor connects A/D modular converter, and humidity display module connects humidity computing module.
Total demand of the present utility model:
In conjunction with current my design and actual conditions, there are following mission requirements: temp probe and the moisture probe of during detection, removing temperature and humidity controller, connect the temperature and humidity controller detection line of instrument, adjusting knob, observe temperature and humidity controller, when temperature and humidity controller moves, at tester digital display module, can directly read the working value of temperature or humidity.Digital display module also can be by built-in Temperature Humidity Sensor display standard humiture.Built-in Temperature Humidity Sensor is disconnected, connect respectively temperature, moisture probe that temperature and humidity controller is joined, comparison humiture is whether the probe of distinguishable temperature and humidity controller damages.In addition, this tester is also furnished with self-contained electric system, and to tester, being full of can be without connecting 220V power supply after electricity.
Hardware circuit design and analysis
Single-chip minimum system
After having selected the required hardware of the design, just need to carry out the design effort of circuit, the circuit design only holding water can be combined into single electric elements the works that can realize various functions.Therefore circuit design is most important in whole manufacturing process, must be very familiar to Ling Yang SPCE061A single-chip microcomputer and want completing circuit to design.The built-in 8 path 10 position analog-digital converters of SPCE061A, wherein 7 passages are used for analog signals (for example voltage signal) to be converted to digital quantity signal, can directly pass through to go between (IOA[0～6]) input.In fact analog to digital converter (ADC, Analog to Digital Converter) can be regarded as to a scrambler of realizing the conversion of mould/number signal.In ADC, by digital to analog converter DAC0 and successive approximation register SAR, form successive approximation analog-digital converter as shown in Figure 2.
Specific design
The design has selected Ling Yang SPCE061A single-chip microcomputer and a 5K Ω negative tempperature coefficient thermistor to combine, and the voltage at the interrupt system Real-Time Monitoring thermistor two ends by Ling Yang SPCE061A single-chip microcomputer calculates temperature value through microprocessor.
Resistance temperature measurement principle
Thermistor is a kind of novel semi-conductor temperature-sensing element that development in recent years is got up.Due to it have highly sensitive, volume is little, lightweight, thermal inertia is little, the life-span is long and the advantage such as low price, therefore application is very extensive.Negative coefficient thermistor thermistor is different from ordinary hot resistance, and it has negative resistance-temperature characteristic, and when temperature raises, resistance value reduces; When temperature reduces, resistance value increases, its family curve as shown in Figure 3:
The resistance of thermistor---temperature characteristics is an index curve, and nonlinearity is larger, therefore will carry out linearization process in use, although linearization process can be improved the family curve of thermistor, more complicated.Be everlasting in less demanding general application for this reason, be made in the linear supposition of the interior temperature of certain temperature range and resistance, to simplify calculating.The application of thermistor is to give thermistor with constant electric current for sense temperature for this reason, and measuring resistance two ends just obtain a voltage, then just can try to achieve temperature by following formula: T=T
0-KV
t
Wherein: T------dut temperature
T
0the temperature parameter that------is relevant with thermistor characteristic
The coefficient that K-----is relevant with thermistor characteristic
V
tthe voltage at------thermistor two ends
According to this formula, if record the voltage V at thermistor two ends
t, then know parameter T
0and COEFFICIENT K, can calculate the environment temperature of thermistor, namely tested temperature.
Choosing of fixed resistance R resistance:
Good one section of MFD-502-34 type thermistor linearization is at-20 ℃ to 80 ℃, in order to make measured signal substantially approach full scale value when maximum temperature and the minimum temperature, take in the range of linearity in the middle of the resistance of certain some temperature as the value of fixed resistance.After their dividing potential drops, the input voltage of AD be AD input voltage range half.In the time of 25 ℃, the resistance of thermistor is 5K Ω, so choose the value of fixed resistance R, is 5K Ω.In the time of-20 ℃, the resistance of thermistor is 37.399K Ω, and thermistor both end voltage VRT=2.9V approaches the upper limit 3.3V of A/D input voltage; In the time of 80 ℃, the resistance of thermistor is 0.796K Ω, and thermistor both end voltage VRT=0.45V approaches the lower limit 0V of A/D input voltage.The A/D value of SPCE061A value of reaching capacity not all in the good region of temperature linearityization.During according to 0 connection, T0=76, K=0.1022, according to above formula and parameter, measures the voltage at thermistor two ends and just can obtain dut temperature.
R25℃=10K?B(25/50)=3470K
Temperature computation
The main contents of temperature sensing design effort, become thermistor both end voltage value into digital quantity through A/D conversion exactly, then by software approach, calculate temperature value.
In design, system has been expanded a button on the basis of Ling Yang SPCE061A single-chip microcomputer, be connected to the IOA15 of SPCE061A, when button is pressed, just carry out A/D conversion initialization, and carry out four A/D conversion, the A/D transformation result of SPCE061A is high 10, moved into low 10 at every turn and calculates four mean values again and return as the effective result of AD; In order to improve accuracy, variable TempAD, Temper adopt floating number, have calculated and have used digital display tube displays temperature.Because play function when the playback can change some parameters, for the purpose of stable, before each A/D conversion, all doing an initialization.
The reason such as inaccurate of, the fixed resistance of with thermistor connecting not the same due to the characteristic of each thermistor, every thermometer is at least looked at 5 and is proofreaied and correct in whole measurement range, and suitable modification parameter is to reach optimum condition.
Working power circuit
The operating voltage of Ling Yang single-chip microcomputer is 3.3V, and obtaining operating voltage has two kinds of modes:
(1) by two continuous step-downs of diode, make the voltage of 5V be down to 3.6V, for chip.This method is fairly simple, but magnitude of voltage is not very accurate.
(2) by SPY0029, can obtain 3.3V voltage accurately, if Fig. 4 is the circuit of power unit, 4.5V DC voltage produces 3.3V and powers to whole system after SPY0029.
The voltage of SPY0029 Shi Lingyang company design is adjusted IC, adopts CMOS technique.SPY0029 has the features such as quiescent current is low, driving force strong, linear adjustment is outstanding.
VDDH3 in Fig. 4 is the I/O level reference of SPCE061A, connects 51 pin of SPCE061A, and it is 3.3V that this connection makes I/O output high level; VDDP is PLL phaselocked loop power supply, connects 7 pin of SPCE061A; VDD and VDDA are respectively digital power and analog power, connect respectively 15 pin and 36 pin of SPCE061A; AVSS1 is in analog, connects 24 pin of SPCE061A; VSS is digitally, connects 38 pin of SPCE061A.
Microcontroller system circuit design
Single-chip minimum system is by CUP chip, clock circuit (external 11.0592HZ crystal oscillator), and reset circuit forms.Its circuit diagram is as shown in Figure 5:
Display system circuit design
Use at present wider display to have CRT, LED, LCD and 3D display etc., according to the actual demand of titanium slag automatic weighing system, the design selects LED nixie display, because consider that price is not high and can realize required display requirement.Its hardware chart as shown in Figure 6.
In sum:
The utility model design has realized take single-chip microcomputer as core, and the monitoring of the temperature and humidity controller based on thermistor, demonstration and control system, produce the simple tester of humiture control device.This system architecture is simple, easy to operate, and can realize higher precision by programming.The simple principle of this instrument utilization provides the method for most convenient for production scene check temperature and humidity controller.
Claims (4)
1. a temperature and humidity controller detector, is characterized in that: this detector comprises temperature and humidity controller, rheostat, display module and humiture collection circuit; Display module is divided into temperature display module and humidity display module, and temperature display module and humidity display module are all connected to temperature and humidity controller by rheostat, and humiture collection circuit is connected to temperature and humidity controller.
2. temperature and humidity controller detector according to claim 1, is characterized in that: humiture collection circuit is divided into temperature collection circuit and humidity collection circuit; Temperature collection circuit is connected to temperature and humidity controller by rheostat, and temperature and humidity controller connects temperature display module by rheostat; Humidity collection circuit is connected to temperature and humidity controller by rheostat, and temperature and humidity controller is connected to humidity display module by rheostat.
3. temperature and humidity controller detector according to claim 2, is characterized in that: temperature collection circuit is temperature sensor or temp probe; Humidity collection circuit is humidity sensor or moisture probe.
4. temperature and humidity controller detector according to claim 3, it is characterized in that: temperature and humidity controller consists of single-chip microcomputer, in this single-chip microcomputer, be provided with A/D modular converter and humiture and calculate module, humiture is calculated module and is comprised temperature computation module and humidity computing module, temperature sensor is connected to A/D modular converter, and temperature display module connects temperature computation module; Humidity sensor connects A/D modular converter, and humidity display module connects humidity computing module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320587833.3U CN203535468U (en) | 2013-09-23 | 2013-09-23 | Detector for temperature and humidity controller |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320587833.3U CN203535468U (en) | 2013-09-23 | 2013-09-23 | Detector for temperature and humidity controller |
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| Publication Number | Publication Date |
|---|---|
| CN203535468U true CN203535468U (en) | 2014-04-09 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320587833.3U Expired - Lifetime CN203535468U (en) | 2013-09-23 | 2013-09-23 | Detector for temperature and humidity controller |
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| Country | Link |
|---|---|
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103488164A (en) * | 2013-09-23 | 2014-01-01 | 国家电网公司 | Detector for temperature and humidity controller |
| CN104360026A (en) * | 2014-11-27 | 2015-02-18 | 南车株洲电力机车有限公司 | Urban rail vehicle as well as main air pipeline air humidity detection device thereof and detection method |
-
2013
- 2013-09-23 CN CN201320587833.3U patent/CN203535468U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103488164A (en) * | 2013-09-23 | 2014-01-01 | 国家电网公司 | Detector for temperature and humidity controller |
| CN104360026A (en) * | 2014-11-27 | 2015-02-18 | 南车株洲电力机车有限公司 | Urban rail vehicle as well as main air pipeline air humidity detection device thereof and detection method |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140409 |
|
| CX01 | Expiry of patent term |