CN206339258U - Laboratory safety-protection system based on Zigbee - Google Patents
Laboratory safety-protection system based on Zigbee Download PDFInfo
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- CN206339258U CN206339258U CN201621215509.9U CN201621215509U CN206339258U CN 206339258 U CN206339258 U CN 206339258U CN 201621215509 U CN201621215509 U CN 201621215509U CN 206339258 U CN206339258 U CN 206339258U
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Abstract
A kind of laboratory safety-protection system based on Zigbee, including signal acquisition module, signal analysis module, signal processing module.Signal acquisition module is made up of temperature acquisition sensor, humidity collection sensor and multi-channel analog converter；Signal analysis module by AID converters and singlechip group into；The white display circuit of signal processing module and warning circuit composition.Signal acquisition module is connected with signal analysis module, the humiture information transmission collected is analyzed and handled to signal analysis module, the signal analysis module other end is connected with signal processing module, is handled and is shown receiving temperature-humidity signal from signal acquisition module and being delivered to signal processing module.Therefore said structure design, a kind of laboratory safety-protection system based on Zigbee of the utility model are used, temperature separately gathers signal with humidity, and just to gather the degree of accuracy stronger, the system cost is cheap, easy to use and measurement accurately.
Description
Technical field
The utility model belongs to safety-protection system field, and in particular to a kind of Laboratory Temperature Humidity Detection based on Zigbee
Safety-protection system.
Background technology
In recent years, with college student quantity scientific research level continuous improvement, the scale and instrument quantity in laboratory are entered
One step expands, and potential safety hazard also increases therewith, thus laboratory security monitoring system become battle support laboratory safe operation and
The important topic of management.Moistureproof, mould proof, anti-corrosion, it is explosion-proof be laboratory routine work important content, be weigh laboratory room managing
The important indicator of quality, temperature, as two important physical quantitys, directly influences the use longevity of stockpile with humidity
Life and functional reliability, thus it is particularly important in the important monitoring in real time to humiture of Laboratory safety management.
At present, tradition be to the safety-protection system of Temperature and Humidity with humidometer, hair hygrometer, dual metal type meter and
The test equipments such as humidity test paper, by manually being detected, are aerated to the laboratory for not meeting temperature and humidity requirement, go
The work such as wet and cooling, to reach the real-time monitoring to laboratory security protection.
Although above-mentioned conventional, prior art is for two important parameters of humiture of laboratory safety-protection system, carry out in real time
Monitoring, reduces the potential safety hazard in laboratory, improves the safety in laboratory.
But the laboratory safety-protection system of traditional artificial detection method has the following disadvantages：Waste time and energy high cost, efficiency
It is low, and the temperature and humidity error of test are big, randomness is big.
The content of the invention
The purpose of this utility model is based on Zigbee laboratories, low cost, easy to use and measurement there is provided a kind of
The accurate laboratory safety-protection system with temp.-humidity measuring apparatus.
To achieve the above object, technical scheme provided by the utility model is：
At a kind of safety-protection system based on Zigbee laboratories, including signal acquisition module, signal analysis module and signal
Manage the big module of module three；Signal acquisition module is by temperature acquisition sensor, humidity collection sensor and multi-channel analog converter group
Into；Signal analysis module by A/D converter and singlechip group into；Signal processing module is made up of display circuit and warning circuit；
Signal acquisition module is connected with signal analysis module, and the humiture information transmission collected is divided to signal analysis module
Analyse and handle, the signal analysis module other end is connected with signal processing module, believe humiture is received from signal acquisition module
Number being delivered to signal processing module is handled and is shown.
As further technical scheme, temperature acquisition sensor is connected with one end of multi-channel analog converter, multichannel mould
One end of the other end and A/D converter of intending converter is connected, and the other end of A/D converter is connected with single-chip microcomputer；Humidity collection
Sensor is connected with one end of multi-channel analog converter, and the other end of multi-channel analog converter is connected with single-chip microcomputer；Single-chip microcomputer
The other end is connected with display circuit and warning circuit.
As further technical scheme, the temperature sensor uses model AD590 temperature sensors.
As further technical scheme, the humidity sensor uses model HS1100 capacitance sensors.
As further technical scheme, the multi-channel analog converter uses model CD4051 variable connectors.
As further technical scheme, the A/D converter uses the double integrator converter of model high precision
MC14433。
As further technical scheme, the single-chip microcomputer uses 8031 single-chip microcomputers.
The beneficial effects of the utility model are：The temperature acquisition that the safety-protection system based on Zigbee laboratories provided is used
Sensor, which separately gathers signal with humidity collection sensor and reduces test error, makes the collection degree of accuracy stronger, and the system cost is low
Honest and clean, easy to use and measurement is accurately.
Brief description of the drawings
Fig. 1 is system architecture diagram schematic diagram of the present utility model；
Fig. 2 is the internal core circuit diagram of AD590 temperature sensors；
Fig. 3 is 555 oscillating circuit schematic diagrames of rate-adaptive pacemaker；
Fig. 4 is CD4051 inside theory diagram schematic diagram.
Embodiment
To describe technology contents of the present utility model, construction feature, the purpose and effect realized in detail, below in conjunction with reality
Apply mode and coordinate accompanying drawing to be described in detail.
As shown in figure 1, the utility model provides a kind of safety-protection system based on Zigbee laboratories, it includes signal acquisition
Module, signal analysis module, the big module of signal processing module three.Signal acquisition module is by temperature acquisition sensor, humidity collection
Sensor and multi-channel analog converter composition；Signal analysis module by A/D converter and singlechip group into；Signal processing module by
Display circuit and warning circuit composition.Signal acquisition module is connected with signal analysis module, the humiture information collected
It is delivered to signal analysis module to be analyzed and handled, the signal analysis module other end is connected with signal processing module, from letter
Number acquisition module, which receives temperature-humidity signal and is delivered to signal processing module, to be handled and is shown.
Temperature acquisition sensor is connected with one end of multi-channel analog converter, the other end and A/D of multi-channel analog converter
One end connection of converter, the other end of A/D converter is connected with single-chip microcomputer；Humidity collection sensor and multi-channel analog converter
One end connection, the other end of multi-channel analog converter is connected with single-chip microcomputer；The other end of single-chip microcomputer and display circuit and report
Alert circuit connection.
Wherein, the temperature sensor uses model AD590 temperature sensors, and the humidity sensor uses model
HS1100 capacitance sensors, the multi-channel analog converter uses model CD4051 variable connectors, and the A/D converter is used
The double integrator converter MC14433 of model high precision, the single-chip microcomputer uses 8031 single-chip microcomputers.
A kind of safety-protection system based on Zigbee laboratories that embodiments above is mentioned, by the collection to signal,
Analysis and processing, reach the real-time monitoring to laboratory safety-protection system.The important technological parameters of TT＆C system are as follows:Temperature detection
Scope：-30℃-+50℃；Measurement accuracy：0.5℃；Humidity Detection scope：10%-100%RH；Accuracy of detection：1%RH；Temperature
Display mode：Four displays；Humidity display mode：Four displays；Type of alarm：The buzz alarm of triode driving.
As shown in Fig. 2 the design uses equivalent to one constant-current source of temperature sensor AD 590, it is straight with 5~30V
Flow power supply be connected, and output end concatenate a 1k Ω constant resistance, then, the electric current flowed through on this resistance will with by thermometric
Degree is directly proportional, and now resistance two ends will have 1mV/K voltage signal.AD590 internal cores circuit utilizes Δ UBE characteristics
The temperature-sensitive part core circuit of integrated PN junction sensor, wherein T1, T2 plays constant current, available for make left and right two branch roads current collection
Electrode current I1 and I2 is equal；T3, T4 are the transistors of temperature-sensitive, and the material of two pipes is identical with technique, but T3 is substantial
It is to be formed by n coupled in parallel, thus its junction area is n times of T4.T3 and T4 transmitting junction voltage UBE3 and UBE4 is through anti-
It is added in after polarity series connection on resistance R, so terminal voltage is Δ UBE on R.Therefore, electric current I1=Δs UBE/R=(KT/q) (lnn)/
R, the total current of circuit will be directly proportional to thermodynamic temperature T, this electric current is led on load resistance RL just to can obtain be directly proportional to T
Output voltage.Due to make use of constant-current characteristics, so output signal is not influenceed by supply voltage and conductor resistance.Resistance R
It is the film resistor formed on silicon plate, the resistance have modified its resistance value with laser, thus available 1 under fiducial temperature
μ A/K I values.
As shown in figure 3, the design is placed in 555 oscillating circuits using capacitance sensor HS1100, by the change of capacitance
Switch to the voltage-frequency signal being inversely proportional therewith, the variable quantity of electric capacity can be changed into the letter that computer is easy to receive exactly
Number.Chip outer meeting resistance R4, R2 of integrated timer 555 and humicap C, constitutes the charge circuit to C.7 ends pass through chip
Internal transistor shorted to earth constitutes the discharge loop to C again, and by pin 2,6 ends are connected is incorporated into comparator in piece,
Become as typical a multivibrator, i.e. square-wave generator.In addition, R3 is to prevent the protective resistance of output short-circuit, R1 is used
In equilibrium temperature coefficient.The alternation procedure of the temporary stable state of the oscillating circuit two is as follows：Power supply Vs first is charged by R4, R2 to C,
After the t charging intervals, Uc reaches the high triggering level of comparator in chip, about 0.67Vs, and now the end of output pin 3 is by high level
Bust is low level, is then discharged by R2, after t discharge times, and Uc drops to the low triggering level of comparator, about 0.33Vs
Output, now the end of output pin 3 is again high level by low level bust, is so tossed about, and forms square wave output.Wherein, fill
Discharge time is t=C (R4+R2) Ln2t electric discharges=CR2Ln2, thus, the square wave frequency f=1/ (t electric discharges+t chargings) of output=
1/ [C (R4+R2) Ln2], it is seen then that air humidity is just changed into frequency signal therewith in inverse ratio by 555 measuring circuits.
Controlled as shown in figure 4, the design employs the double amounts of humiture, model CD4051 multi-channel analog converters, it is
A kind of monolithic, COMS, 8 channel switch.The chip selects 1 decoder by DTL/TTL-COMS level translators with forbidding the 8 of end
Input, is constituted plus 8 COMS analog switches TG of control respectively.
Each pins of CD4051 are described as follows:
Channel line IN/OUT (4,2,5,1,12,15,14,13)：When this group of pin is as input, it can be achieved 8 and select 1 function,
During as output, 1 point of 8 function can be achieved；
XCOM(3)：It is public output when the pin is as output, is input during as input；
A、B、C(11、10、9)：Address pin；
INH(6)：Forbid input pin, when INH is high level, to forbid each passage to be connected with output end OUT/IN, INH
During for low level, it is allowed to which each passage is connected with deferent segment OUT/IN；
VDD(16)/VSS(8)：VDD is positive supply input, and limiting value is 17V, and VSS is negative supply input, limiting value
For -17V；
VGG(7):Level translator power supply, generally meets+5V or -5V.When CD4051 selects 1 function as 8, if A, B, C are
Logical zero (INH=0), then address code 00013 output end OUT/IN is connected with passage 0 after decoding.It is defeated in the case of other
Go out to hold OUT/IN output ends OUT/IN.
Therefore, a kind of safety-protection system based on Zigbee laboratories that the present embodiment is provided, temperature acquisition sensor
Signal is separately gathered with humidity collection sensor, test error is reduced, makes the collection degree of accuracy stronger, the system cost is cheap,
Easy to use and measurement is accurately.
It is above-mentioned that only the specific embodiment of the utility model is illustrated, but protection of the present utility model can not be used as
Scope, equivalence changes or modification or equal proportion made by every design spirit according in the utility model are zoomed in or out
Deng being deemed to fall protection domain of the present utility model.
Claims (7)
1. the laboratory safety-protection system based on Zigbee, it is characterised in that：Including signal acquisition module, signal analysis module, letter
Number processing module:The signal acquisition module is by temperature acquisition sensor, humidity collection sensor and multi-channel analog converter group
Into:The signal analysis module by AID converters and singlechip group into；The signal processing module is by display circuit and alarm electricity
Road is constituted；The signal acquisition module is connected with signal analysis module, the humiture information transmission collected to signal point
Analysis module is analyzed and handled, and the signal analysis module other end is connected with signal processing module, from signal acquisition mould
Block, which receives temperature-humidity signal and is delivered to signal processing module, to be handled and is shown.
2. the laboratory safety-protection system as claimed in claim 1 based on Zigbee, it is characterised in that：The temperature acquisition sensing
Device is connected with one end of multi-channel analog converter, and the other end of the multi-channel analog converter is connected with one end of AID converters,
The other end of the AID converters is connected with single-chip microcomputer；One end of the humidity collection sensor and multi-channel analog converter connects
Connect, the other end of the multi-channel analog converter is connected with single-chip microcomputer；The other end of the single-chip microcomputer and display circuit and report
Alert circuit connection.
3. the laboratory safety-protection system as claimed in claim 1 or 2 based on Zigbee, it is characterised in that：The temperature acquisition
Sensor uses model AD590 temperature sensors.
4. the laboratory safety-protection system as claimed in claim 1 or 2 based on Zigbee, it is characterised in that：The humidity collection
Sensor uses model HSllOO capacitance sensors.
5. the laboratory safety-protection system as claimed in claim 1 or 2 based on Zigbee, it is characterised in that：The multi-channel analog
Converter uses model CD4051 variable connectors.
6. the laboratory safety-protection system as claimed in claim 1 or 2 based on Zigbee, it is characterised in that：The AID converters
Using the double integrator converter MC14433 of model high precision.
7. the laboratory safety-protection system as claimed in claim 1 or 2 based on Zigbee, it is characterised in that：The single-chip microcomputer is adopted
Use 8031 single-chip microcomputers.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621215509.9U CN206339258U (en) | 2016-11-11 | 2016-11-11 | Laboratory safety-protection system based on Zigbee |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201621215509.9U CN206339258U (en) | 2016-11-11 | 2016-11-11 | Laboratory safety-protection system based on Zigbee |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206339258U true CN206339258U (en) | 2017-07-18 |
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ID=59300536
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201621215509.9U Expired - Fee Related CN206339258U (en) | 2016-11-11 | 2016-11-11 | Laboratory safety-protection system based on Zigbee |
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| Country | Link |
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| CN (1) | CN206339258U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521823A (en) * | 2019-01-07 | 2019-03-26 | 五邑大学 | A kind of temperature and humidity control system suitable for MMS-2A friction and wear tester |
-
2016
- 2016-11-11 CN CN201621215509.9U patent/CN206339258U/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109521823A (en) * | 2019-01-07 | 2019-03-26 | 五邑大学 | A kind of temperature and humidity control system suitable for MMS-2A friction and wear tester |
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| GR01 | Patent grant | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20170718 Termination date: 20171111 |
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| CF01 | Termination of patent right due to non-payment of annual fee |