CN103236150A - Distributed wireless humiture measuring apparatus and method adopting measuring apparatus to measure humiture - Google Patents
Distributed wireless humiture measuring apparatus and method adopting measuring apparatus to measure humiture Download PDFInfo
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- CN103236150A CN103236150A CN2013101755362A CN201310175536A CN103236150A CN 103236150 A CN103236150 A CN 103236150A CN 2013101755362 A CN2013101755362 A CN 2013101755362A CN 201310175536 A CN201310175536 A CN 201310175536A CN 103236150 A CN103236150 A CN 103236150A
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Abstract
The invention discloses a distributed wireless humiture measuring apparatus and a method adopting the measuring apparatus to measure humiture, and belongs to the field of humiture measurement. The distributed wireless humiture measuring apparatus and the method solves the problems that the wiring is complicated when the humiture is measured in a large area range, the maintenance is difficult, a wiring blind region exists, and the measuring method of the humiture is lack of man-machine interaction. The distributed wireless humiture measuring apparatus comprises a main control unit and n sub-control units, wherein the main control unit controls a radio frequency transmit-receive circuit I to send a control signal to the sub-control units and receives the humiture data sent by the sub-control units, and a warning circuit gives an alarm; a liquid crystal display circuit can display the humiture of the sub-control units and the history humiture, and a sub-controller circuit of each sub-control unit controls a radio frequency transmit-receive circuit II to receive the control signal and sends humiture information to the main control unit; and a humiture signal collected by a humiture collecting circuit is sent to a controller circuit and sends the humiture signal to the main control unit through the radio frequency transmit-receive circuit II. The distributed wireless humiture measuring apparatus and the method provided by the invention are suitable for measuring humiture.
Description
Technical field
The invention belongs to the temperature and humidity measurement field, be specifically related to distributed wireless temperature and humidity measurement instrument and adopt this measuring instrument to measure the method for humiture.
Background technology
For the higher occasion of environmental requirements such as laboratory and silo, need accurately measures ambient temperature and humidity, for example: a lot of data in laboratory need humiture corresponding one by one, need to obtain in real time the humiture in each storehouse in the silo.For the distributed measurement of several thousand square metres of scopes such as silo, traditional method is to make up the RS485 distributed field bus, is interfered easily for long Distance Transmission so on the one hand; The warehouse connects up also comparatively loaded down with trivial details more for a long time on the other hand; Simultaneously, the circuit of laying needs often to safeguard, has increased cost; The loaded down with trivial details tediously long system power dissipation that also increased connects up; Traditional wiring may cause the humiture of some points to measure because the wiring blind area appears in environmental limit.What a lot of sensors were exported in the existing application is analog quantity and needs peripheral circuit to assist to carry out signals collecting and analog to digital conversion, and this is unfavorable for the direct deal with data of MCU, has also reduced measuring reliability simultaneously; And be difficult to obtain same point humiture data one to one.On the other hand, existing conventional temperature is measured and is only carried out real-time measurement and the demonstration of temperature mostly, lacks man-machine interaction.Existing temperature survey temperature and humidity measurement time wiring in than the large tracts of land scope is complicated, has the wiring blind area, the problem that is subject to disturb.
Summary of the invention
The present invention for solve existing temperature and humidity measurement than in the large tracts of land scope during temperature and humidity measurement wiring complicated, difficult in maintenance, have the wiring blind area, and the measuring method of humiture lacks the problem of man-machine interaction, the method for proposition distributed wireless temperature and humidity measurement instrument and this measuring instrument measurement humiture.
A kind of distributed wireless temperature and humidity measurement instrument of the present invention, it comprises main control unit and n sub-control module this measuring instrument, wherein, n is the integer greater than 1;
Main control unit comprises main controller circuit, liquid crystal display circuit, keyboard circuit, power circuit, warning circuit and a RF transmit-receive circuit;
The radio-frequency (RF) control signal output of main controller circuit or information receiving end mouth receive with the control signal of a RF transmit-receive circuit by bus or information transmitting terminal links to each other, the alarm signal output ends of main controller circuit links to each other with the alerting signal input end of warning circuit, the liquid crystal display signal output part of main controller circuit links to each other with the liquid crystal display signal input part of liquid crystal display circuit, the keyboard signal input end of main controller circuit links to each other with the keyboard signal input end of keyboard circuit
The power supply signal output terminal of a power circuit links to each other with the power supply signal input end of main controller circuit, the power supply signal input end of liquid crystal display circuit, the power supply signal input end of keyboard circuit, the power supply signal input end of warning circuit and the power supply signal input end of a RF transmit-receive circuit respectively;
Each sub-control module includes No. two RF transmit-receive circuits, No. two power circuits, sub-controller circuit and humiture collection circuit;
The radio-frequency (RF) control signal output of sub-controller circuit or information receiving end receive with the control signal of No. two RF transmit-receive circuits by bus or information transmitting terminal links to each other, the temperature-humidity signal input end of sub-controller circuit links to each other with the temperature-humidity signal output terminal of humiture collection circuit by bus
The power supply signal output terminal of No. two power circuits links to each other with the power supply signal input end of No. two RF transmit-receive circuits, the power supply signal input end of temperature collection circuit and the power supply signal input end of sub-controller circuit respectively;
No. two RF transmit-receive circuits of each sub-control module all adopt wireless mode to carry out the signal transmission with RF transmit-receive circuit of main control unit;
The button of keyboard circuit comprises numerical key, emission key, preservation key, repeat key, query key and ESC Escape;
Adopt above-mentioned distributed wireless temperature and humidity measurement instrument to measure the method for humiture, the concrete steps of this method are:
It is receiving mode that step 3, sub-controller circuit will arrange No. two RF transmit-receive circuits, waits for the control signal of a RF transmit-receive circuit transmission that receives main control unit;
Whether step 4, main controller circuit have numerical key to press by regularly interrupting detecting keyboard circuit, if then main controller circuit is with the address of the numerical information by the numerical key input as sub-control module, execution in step five; Otherwise execution in step 41;
Whether step 4 one, return step 4, continuing to detect keyboard circuit has numerical key to press;
The current state of emission key, query key or the ESC Escape of step 5, detection keyboard circuit;
When the detection emission key was pressed, RF transmit-receive circuit of main controller circuit control sent the address information of sub-control module to No. two RF transmit-receive circuits of sub-control module by wireless mode; Execution in step six;
When the detection query key was pressed, main controller circuit control liquid crystal display circuit demonstrated the historical humiture information of the sub-control module of step 3 Input Address, and the historical humiture data of this sub-control module are inquired about, and returns step 4;
When the detection ESC Escape is pressed, return step 4;
It is receiving mode that step 6, main controller circuit arrange a RF transmit-receive circuit;
No. two RF transmit-receive circuits of step 7, each sub-control module all receive the address information that RF transmit-receive circuit sends sub-control module, judge whether the address in this information is the address of self, if execution in step eight then, otherwise execution in step July 1st;
Step July 1st, return execution in step seven, continue to wait for the control signal that a RF transmit-receive circuit receiving main control unit sends;
The humiture information that step 8, each sub-control module collect the humiture collection circuit by No. two RF transmit-receive circuits through being wirelessly sent to a RF transmit-receive circuit of main control unit;
The main controller circuit of step 9, main control unit detects a RF transmit-receive circuit and whether successfully receives data, if then the data that sub-control module is sent are sent to liquid crystal display circuit and carry out humiture and show, finishes the distributed wireless temperature and humidity measurement.
The present invention adopts wireless transmission to carry out distributed measurement, need not wiring, can measure the temperature of all measurement points in several thousand square metres of scopes, measure non-blind area, avoided the route bus process of traditional type transmission, need not consider the insulation of transmission course and to the maintenance of circuit, master console is provided with keyboard simultaneously, and this measuring instrument is measured the method for humiture can carry out the selectivity storage and demonstration of humiture, and the query history humiture is convenient to carry out man-machine interaction.
Description of drawings
Fig. 1 is the electrical structure synoptic diagram of distributed wireless temperature and humidity measurement instrument of the present invention;
Fig. 2 is the electrical structure synoptic diagram of embodiment two described distributed wireless temperature and humidity measurement instrument.
Embodiment
Embodiment one: in conjunction with Fig. 1 present embodiment is described, the described a kind of distributed wireless temperature and humidity measurement instrument of present embodiment, this measuring instrument comprise main control unit and n sub-control module, and wherein, n is the integer more than or equal to 2;
Main control unit comprises main controller circuit 1, liquid crystal display circuit 2, keyboard circuit 3, power circuit 4, warning circuit 5 and a RF transmit-receive circuit 6;
The RF control signal output of main controller circuit 1 or information receiving end mouth receive with the control signal of a RF transmit-receive circuit 6 by bus or information transmitting terminal is connected, the alarm signal output ends of main controller circuit 1 is connected with the alarm signal input of warning circuit 5, the liquid crystal display signal output part of main controller circuit 1 is connected with the liquid crystal display signal input part of liquid crystal display circuit 2, the keyboard signal input of main controller circuit 1 is connected with the keyboard signal input of keyboard circuit 3
The power supply signal output terminal of a power circuit 4 links to each other with the power supply signal input end of main controller circuit 1, the power supply signal input end of liquid crystal display circuit 2, the power supply signal input end of keyboard circuit 3, the power supply signal input end of warning circuit 5 and the power supply signal input end of a RF transmit-receive circuit 6 respectively;
Each sub-control module includes No. two RF transmit-receive circuits 7, No. two power circuits 8, sub-controller circuit 9 and humiture collection circuit 10;
The radio-frequency (RF) control signal output of sub-controller circuit 9 or information receiving end receive with the control signal of No. two RF transmit-receive circuits 7 by bus or information transmitting terminal links to each other, the temperature-humidity signal input end of sub-controller circuit 9 links to each other with the temperature-humidity signal output terminal of temperature collection circuit 10 by bus
The power supply signal output terminal of No. two power circuits 8 links to each other with the power supply signal input end of No. two RF transmit-receive circuits 7, the power supply signal input end of humiture collection circuit 10 and the power supply signal input end of sub-controller circuit 9 respectively;
No. two RF transmit-receive circuits 7 of each sub-control module all adopt wireless mode to carry out the signal transmission with the RF transmit-receive circuit 6 of main control unit;
The button of keyboard circuit 3 comprises numerical key, emission key, preservation key, repeat key, query key and ESC Escape.
Present embodiment adopts wireless transmission to carry out distributed measurement, adopts digital integrated Temperature Humidity Sensor, and it is auxiliary to need not peripheral circuit, and circuit is simple, and is affected by environment little, the measuring accuracy height, and the reliability height, measurement range is big; And can obtain temperature and humidity one to one simultaneously.Be provided with warning circuit simultaneously, can in time report to the police according to pre-set threshold.
Present embodiment is when needing the occasion of N monitoring point, if adopt the mode of wire transmission: if master console and monitoring point employing Y-connection need to lay N bar data line altogether the monitoring point is connected respectively to master console; If master console adopts daisy chaining to be connected with the monitoring point, also need to lay N bar data line altogether.If adopt the monitoring point to be connected respectively to bus allocator, to be connected to the mode of master console by bus allocator again, then need N+1 bar data line.And adopt the wireless connections mode, and need not wiring, just can realize the transmission of data, thereby avoid the complex process of wiring, reach the periodic maintenance work to lead.
Embodiment two: present embodiment is described in conjunction with Fig. 2, the difference of present embodiment and embodiment one described a kind of distributed wireless temperature and humidity measurement instrument is, each sub-control module also comprises liquid crystal display circuit 11 No. two, the liquid crystal display signal output part of the liquid crystal display signal input part connexon controller circuitry 9 of described No. two liquid crystal display circuits 11, the power supply signal input end of No. two liquid crystal display circuits 11 connects a power supply signal output terminal of No. two power circuits 8.
This liquid crystal circuit is used for the humiture data that the sub-control module of demonstration collects in real time, can intuitively understand the humiture information of each sub-control module place environment.
Embodiment three: present embodiment is to the further specifying of embodiment one described a kind of distributed wireless temperature and humidity measurement instrument, and main controller circuit 1 adopts MSP430F149 to realize.
Embodiment four: present embodiment is to the further specifying of embodiment one described a kind of distributed wireless temperature and humidity measurement instrument, and each sub-controller circuit 9 adopts MSP430F149 to realize.
Embodiment five: present embodiment is to the further specifying of embodiment one described a kind of distributed wireless temperature and humidity measurement instrument, and it is that the chip of nRF905 is realized that RF transmit-receive circuit 6 adopts models.
Embodiment six: present embodiment is to the further specifying of embodiment one described a kind of distributed wireless temperature and humidity measurement instrument, and it is that the chip of nRF905 is realized that No. two RF transmit-receive circuits 7 adopt models.
Embodiment seven: present embodiment is to the further specifying of embodiment one described a kind of distributed wireless temperature and humidity measurement instrument, and it is that the chip of DHT22 is realized that humiture collection circuit 10 adopts models.
Embodiment eight: adopt the method for embodiment one described distributed wireless temperature and humidity measurement instrument temperature and humidity measurement, the concrete steps of this method are:
Whether step 4, main controller circuit 1 have numerical key to press by regularly interrupting detecting keyboard circuit 3, if then main controller circuit 1 is with the address of the numerical information by the numerical key input as sub-control module, execution in step five; Otherwise execution in step 41;
Whether step 4 one, return step 4, continuing to detect keyboard circuit 3 has numerical key to press;
The current state of emission key, query key or the ESC Escape of step 5, detection keyboard circuit 3;
When the detection emission key was pressed, RF transmit-receive circuit 6 of main controller circuit 1 control sent the address information of sub-control module to No. two RF transmit-receive circuits 7 of sub-control module by wireless mode; Execution in step six;
When the detection query key was pressed, main controller circuit 1 control liquid crystal display circuit 2 demonstrated the historical humiture information of the sub-control module of step 3 Input Address, and the historical humiture data of this sub-control module are inquired about, and returns step 4;
When the detection ESC Escape is pressed, return step 4;
No. two RF transmit-receive circuits 7 of step 7, each sub-control module all receive the address information of a sub-control module of RF transmit-receive circuit 6 transmissions, judge whether the address in this information is the address of self, if execution in step eight then, otherwise execution in step July 1st;
Step July 1st, return execution in step seven, continue to wait for the control signal that the RF transmit-receive circuit 6 that receives main control unit sends;
The humiture information that step 8, each sub-control module collect humiture collection circuit 10 by No. two RF transmit-receive circuits 7 through being wirelessly sent to a RF transmit-receive circuit 6 of main control unit;
The main controller circuit 1 of step 9, main control unit detects a RF transmit-receive circuit 6 and whether successfully receives data, if then the data that sub-control module is sent are sent to liquid crystal display circuit 2 and carry out humiture and show, finish the distributed wireless temperature and humidity measurement.
Embodiment nine: embodiment is in the further specifying of the method for embodiment eight described distributed wireless temperature and humidity measurement instrument temperature and humidity measurements, the step 9, if No. one RF transmit-receive circuit 6 successfully receives data, the humiture data and the default humiture threshold value that receive are compared, when if the humiture data that receive exceed threshold information, warning circuit 5 is reported to the police, detect the button input simultaneously, if detecting the preservation key presses, then execution in step two is returned in humiture storage at this moment; If repeat key is pressed, then repeated execution of steps nine, otherwise return execution in step two.
Embodiment ten: present embodiment is further specifying the method for embodiment nine described distributed wireless temperature and humidity measurement instrument temperature and humidity measurements, it is the method for nRF905 chip and humiture collection circuit 10 models temperature and humidity measurement when being the chip of DHT22 that the main controller circuit 1 of this distributed wireless temperature and humidity measurement instrument and sub-controller circuit 9 all adopt MSP430F149, RF transmit-receive circuit 6 and No. two RF transmit-receive circuits 7 all to adopt model, and the concrete steps of this method are:
Sub-control module control procedure:
After step 3, No. two RF transmit-receive circuits 7 of sub-controller circuit 9 configurations enter receiving mode, whether the CD pin that at first detects the nRF905 chip of No. two RF transmit-receive circuits 7 is high level, judge whether No. two RF transmit-receive circuits 7 receive the carrier signal of same frequency, whether the AM pin that the carrier signal of detection same frequency then further detects the nRF905 chip is high level, judge that the address that receives is whether consistent with self address, if the address and the own matching addresses that receive, then the AM pin is high level execution in step four; If the address that receives and own address do not match and then only carry out data acquisition and local demonstration does not send;
Whether the DR pin of step 5, detection nRF905 chip is high level, see whether data send successful, if sending the DR pin of successful nRF905 chip is to be high level, sub-controller circuit 9 enters receiving mode by TX_EN and No. two RF transmit-receive circuits 7 of TRX_CE pin configuration that the nRF905 chip is set; Return execution in step two, if send unsuccessful then repeating transmission, till sending successfully;
The main control unit control section:
The current state of emission key, query key or the ESC Escape of step 3, detection keyboard circuit 3:
If press the transmission key, then a RF transmit-receive circuit 6 is placed the transmission state, and the address of sub-control module is sent; Execution in step four;
If press query key, then export the historical humiture of the sub-control module of step 3 Input Address, can only show 3 groups of humiture data;
If press ESC Escape, then return step 2;
Present embodiment adopts wireless transmission, and than traditional RS232 bus transmission model, the RS232 transmission is serious above signal attenuation behind the 15m, is interfered easily; Adopt the RS485 bus transmission model, no matter be Y-connection or daisy chain connected mode, need connect 120 Ω build-out resistors in terminal, make the degradation problem under signal reflex, the antijamming capability that when data transmission distance is far away, produces easily.Simultaneously, because these modes are owing to need wiring, be easy to be subjected to the to connect up influence of physical environment of its signal quality.And this design wireless transmission adopts nRF905, and it adopts the strong Gaussian Frequency Shift Keying modulation system of antijamming capability, and built-in complete communication protocol and CRC check circuit make data transmission more reliable, is fit to industrial occasions.
Claims (9)
1. a distributed wireless temperature and humidity measurement instrument is characterized in that, it comprises main control unit and n sub-control module this measuring instrument, and wherein, n is the integer greater than 1;
Main control unit comprises main controller circuit (1), liquid crystal display circuit (2), keyboard circuit (3), a power circuit (4), warning circuit (5) and a RF transmit-receive circuit (6);
Main controller circuit, (1) radio-frequency (RF) control signal output or information receiving end mouth are by bus and a RF transmit-receive circuit, (6) control signal receives or information transmitting terminal links to each other, main controller circuit, (1) alarm signal output ends and warning circuit, (5) alerting signal input end links to each other, main controller circuit, (1) liquid crystal display signal output part and liquid crystal display circuit, (2) liquid crystal display signal input part links to each other, main controller circuit, (1) keyboard signal input end and keyboard circuit, (3) keyboard signal input end links to each other
The power supply signal output terminal of a power circuit (4) links to each other with the power supply signal input end of main controller circuit (1), the power supply signal input end of liquid crystal display circuit (2), the power supply signal input end of keyboard circuit (3), the power supply signal input end of warning circuit (5) and the power supply signal input end of a RF transmit-receive circuit (6) respectively;
Each sub-control module includes No. two RF transmit-receive circuits (7), No. two power circuits (8), sub-controller circuit (9) and humiture collection circuit (10);
The radio-frequency (RF) control signal output of sub-controller circuit (9) or information receiving end receive with the control signal of No. two RF transmit-receive circuits (7) by bus or information transmitting terminal links to each other, the temperature-humidity signal input end of sub-controller circuit (9) links to each other by the temperature-humidity signal output terminal of bus with humiture collection circuit (10)
The power supply signal output terminal of No. two power circuits (8) links to each other with the power supply signal input end of No. two RF transmit-receive circuits (7), the power supply signal input end of temperature collection circuit (10) and the power supply signal input end of sub-controller circuit (9) respectively;
No. two RF transmit-receive circuits (7) of each sub-control module all adopt wireless mode to carry out the signal transmission with the RF transmit-receive circuit (6) of main control unit;
The button of keyboard circuit (3) comprises numerical key, emission key, preservation key, repeat key, query key and ESC Escape.
2. a kind of distributed wireless temperature and humidity measurement instrument according to claim 1, it is characterized in that, sub-control module also comprises No. two liquid crystal display circuits (11), the liquid crystal display signal output part of the liquid crystal display signal input part connexon controller circuitry (9) of described No. two liquid crystal display circuits (11), the power supply signal input end of No. two liquid crystal display circuits (11) connects a power supply signal output terminal of No. two power circuits (8).
3. a kind of distributed wireless temperature and humidity measurement instrument according to claim 1 is characterized in that, main controller circuit (1) adopts MSP430F149 to realize.
4. a kind of distributed wireless temperature and humidity measurement instrument according to claim 1 is characterized in that, sub-controller circuit (9) adopts MSP430F149 to realize.
5. a kind of distributed wireless temperature and humidity measurement instrument according to claim 1 is characterized in that, a RF transmit-receive circuit (6) adopts nRF905 to realize.
6. a kind of distributed wireless temperature and humidity measurement instrument according to claim 1 is characterized in that, No. two RF transmit-receive circuits (7) adopt nRF905 to realize.
7. a kind of distributed wireless temperature and humidity measurement instrument according to claim 1 is characterized in that, humiture collection circuit (10) adopts DHT22 to realize.
8. adopt the distributed wireless temperature and humidity measurement method of the described a kind of distributed wireless temperature and humidity measurement instrument of claim 1, it is characterized in that the concrete steps of this method are:
Step 1, main controller circuit (1) carry out address width setting, data length setting and redundancy check by bus to a RF transmit-receive circuit (6) and enable to arrange; Sub-controller circuit (9) enables to arrange to No. two RF transmit-receive circuits (7) address width setting, data length setting and redundancy check by bus;
Step 2, sub-controller circuit (9) carry out the humiture data acquisition by timing down trigger control humiture collection circuit (10), obtain the humiture data at sub-control module place;
It is receiving mode that step 3, sub-controller circuit (9) will arrange No. two RF transmit-receive circuits (7), waits for the control signal of a RF transmit-receive circuit (6) transmission that receives main control unit;
Whether step 4, main controller circuit (1) have numerical key to press by regularly interrupting detecting keyboard circuit (3), if then main controller circuit (1) is with the address of the numerical information by the numerical key input as sub-control module, execution in step five; Otherwise execution in step 41;
Whether step 4 one, return step 4, continuing to detect keyboard circuit (3) has numerical key to press;
The current state of emission key, query key or the ESC Escape of step 5, detection keyboard circuit (3);
When the detection emission key was pressed, main controller circuit (a 1) RF transmit-receive circuit of control (6) sent the address information of sub-control module to No. two RF transmit-receive circuits (7) of sub-control module by wireless mode; Execution in step six;
When the detection query key was pressed, main controller circuit (1) control liquid crystal display circuit (2) demonstrated the historical humiture information of the sub-control module of step 3 Input Address, and the historical humiture data of this sub-control module are inquired about, and returns step 4;
When the detection ESC Escape is pressed, return step 4;
It is receiving mode that step 6, main controller circuit (1) arrange a RF transmit-receive circuit (6);
No. two RF transmit-receive circuits (7) of step 7, each sub-control module all receive the address information that a RF transmit-receive circuit (6) sends sub-control module, judge whether the address in this information is the address of self, if execution in step eight then, otherwise execution in step July 1st;
Step July 1st, return execution in step seven, continue to wait for the control signal that the RF transmit-receive circuit (6) that receives main control unit sends;
The humiture information that step 8, each sub-control module collect humiture collection circuit (10) by No. two RF transmit-receive circuits (7) through being wirelessly sent to a RF transmit-receive circuit (6) of main control unit;
The main controller circuit of step 9, main control unit (1) detects a RF transmit-receive circuit (6) and whether successfully receives data, if then the data that sub-control module is sent are sent to liquid crystal display circuit (2) and carry out humiture and show, finish the distributed wireless temperature and humidity measurement.
9. the distributed wireless temperature and humidity measurement method of 8 described a kind of distributed wireless temperature and humidity measurement instrument as requested, it is characterized in that in the step 9, if a RF transmit-receive circuit (6) successfully receives data, the humiture data and the default humiture threshold value that receive are compared, and when exceeding threshold information as if the humiture data that receive, warning circuit (5) is reported to the police, detect the button input simultaneously, press if detect the preservation key, then execution in step two is returned in humiture storage at this moment; If repeat key is pressed, then repeated execution of steps nine, otherwise return execution in step two.
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CN113945246A (en) * | 2021-12-21 | 2022-01-18 | 深圳市聚能优电科技有限公司 | Energy storage temperature and humidity acquisition method, system, equipment and storage medium |
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Application publication date: 20130807 |