CN201173830Y - Two-wire system humiture transmitter with on-site display - Google Patents
Two-wire system humiture transmitter with on-site display Download PDFInfo
- Publication number
- CN201173830Y CN201173830Y CNU2007203001571U CN200720300157U CN201173830Y CN 201173830 Y CN201173830 Y CN 201173830Y CN U2007203001571 U CNU2007203001571 U CN U2007203001571U CN 200720300157 U CN200720300157 U CN 200720300157U CN 201173830 Y CN201173830 Y CN 201173830Y
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Abstract
The utility model discloses a two-wire temperature and humidity transmitter with on-site display. The signal output end T of the temperature detection circuit (4) is connected with the input end of the temperature digital display circuit (5) and the input end of the temperature transmitting circuit (6) with a constant flow source; the temperature digital display (21) is arranged on the shell (1); the signal output end H of the humidity detection circuit (8) is connected with the input end of the humidity digital display circuit (9) and the input end of the humidity transmitting circuit (10) with a constant flow source; the humidity digital display (21) is arranged on the shell (1); the signal output ends Tout and Hout of the temperature and humidity transmitting circuits are respectively connected with the anodes of the external temperature load (18) and the humidity load (19); the cathode of the external power source (17) is respectively connected with the cathodes of the external temperature load (18) and the humidity load (19). The two-wire temperature and humidity transmitter has good heat and corrosion resistant performances, high precision, fast response speed, good stability and low power consumption, and has on-site display function.
Description
Technical field
The utility model relates to the humiture detecting instrument, and is especially a kind of with the on-the-spot two-wire system humiture transmitter that shows.
Background technology
A lot of important occasion at industry, agriculture field; as store at tobacco leaf, production of cigarettes; important events such as food fresh keeping, the oven dry of porcelain base, historical relic preservation, Heating,Ventilating and Air Conditioning (HVAC) and agricultural booth; telemeasurement to temperature humidity is had relatively high expectations; there is following problem in existing humiture integrated transducer transmitter: 1, Temperature Humidity Sensor unprotect; fragile; serviceable life is short; 2, mostly be cases of otherwise standard design greatly; do not meet the two-wire system design of industrial standard, the fire-proof and explosion-proof requirement that does not reach " essential safety ".So-called two-wire system is meant that the instrument and the external world only have two leads to be associated, shared these two lines of instrument power source and output signal line, and not only wiring is simple, also is easy to reach the fire-proof and explosion-proof requirement of " essential safety ".
Summary of the invention
The purpose of this utility model overcomes the deficiencies in the prior art and a kind of industrial standard that meets, the on-the-spot two-wire system humiture transmitter that shows of output 4～20mA current signal band is provided.
The on-the-spot two-wire system humiture transmitter that shows of described band comprises shell 1, the sensor mounting pipe 2 that is connected with shell 1, ring flange 3, it is characterized in that:
The signal output part T of a, temperature sensing circuit 4 is connected with the input end of temperature digital display circuit 5, and signal output part T also is connected with the input end of the temperature transmission circuit 6 of being with constant current source; Temperature digital display 21 is arranged on the shell 1;
The signal output part H of b, humidity measuring circuit 8 is connected with the input end of humidity digital display circuit 9, and signal output part H also is connected with the input end of the humidity transmission circuit 10 of being with constant current source; Humidity digital indicator 22 is arranged on the shell 1;
The positive source of c, temperature transmission circuit 6 and humidity transmission circuit 10 is connected with the positive pole of external power supply 17 respectively, signal output part Tout, the Hout of temperature transmission circuit 6 and humidity transmission circuit 10 is connected with the positive pole of external temperature load 18 with humidity load 19 respectively, and the negative pole of external power supply 17 is connected with the negative pole of external temperature load 18 with humidity load 19 respectively.
The beneficial effects of the utility model are: 1, the humiture testing circuit is reasonable in design, and the measuring accuracy high response speed is fast, good stability, and power consumption is little, long service life; Its transmitter circuit is constant current source output, and the output impedance height has the 4～20mA two-wire system electric current output that meets industrial standard; But 2, dust and the fiber contamination humidity sensor that floats in the probe protective cover barrier gas, and cleaning is convenient; 3, transmitter has the character of essential safety; 4, transmitter has the field digital Presentation Function.
Description of drawings
Fig. 1 is the utility model structural representation,
Fig. 2 is the utility model circuit theory diagrams,
Fig. 3 is that the utility model is installed wiring diagram,
Fig. 4 is a double-layer and double-side board structure of circuit synoptic diagram.
Among the figure: 1-shell, 2-sensor mounting pipe, 3-ring flange; the 4-temperature sensing circuit; the 5-temperature display circuit, 6-temperature transmission circuit, 7-constant-current source device; the 8-humidity measuring circuit; 9-humidity digital display circuit, 10-humidity transmission circuit, 11-constant-current source device; 12,13-double-sided PCB; 14-heavy gauge wire post, 15-temperature sensor, 16-humidity sensor; the 17-external power supply; the load of 18-external temperature, the external humidity load of 19-, the 20-protective cover of popping one's head in; the 21-temperature indicator, 22-humidity digital indicator.
Embodiment
Below in conjunction with accompanying drawing the utility model is further specified: show as Fig. 1; the utility model comprises shell 1, the sensor mounting pipe 2 that is connected with shell 1, ring flange 3; temperature digital display 21 is arranged on the shell 1; humidity digital indicator 22 is arranged on the shell 1; the test side of sensor mounting pipe 2 is provided with microporous mesh probe protective cover 20, and probe protective cover 20 is threaded with sensor mounting pipe 2.
In Fig. 2,3, the signal output part T of temperature sensing circuit 4 is connected with the input end of temperature digital display circuit 5, and signal output part T also is connected with the input end of the temperature transmission circuit 6 of being with constant current source; The signal output part H of humidity measuring circuit 8 is connected with the input end of humidity digital display circuit 9, and signal output part H also is connected with the input end of the humidity transmission circuit 10 of being with constant current source; The positive source of temperature transmission circuit 6 and humidity transmission circuit 10 is connected with the positive pole of external power supply 17 respectively, signal output part Tout, the Hout of temperature transmission circuit 6 and humidity transmission circuit 10 is connected with the positive pole of external temperature load 18 with humidity load 19 respectively, and the negative pole of external power supply 17 is connected with the negative pole of external temperature load 18 with humidity load 19 respectively.
Humiture testing circuit and transmission circuit 4,6,8,10 are arranged on the double-sided PCB shown in Figure 4 12, and temperature, humidity display circuit 5,9 are arranged on the double-sided PCB 13; Realize that by heavy gauge wire post 14 machinery and electric signal connect between the double- sided PCB 12,13.
Its operation parameter is: measuring temperature range is-10 ℃～90 ℃, measuring accuracy is ± 0.5 ℃, measuring humidity range is 10～98%RH, measuring accuracy is ± 3%RH, power supply is at 18～36VDC, its output signal is: temperature 4～20mA (corresponding-10 ℃～90 ℃), (correspondence 0～100%RH), external load resistance is less than 500 Ω for humidity 4～20mA.
When the utility model showed in the band numeral, its temperature resolution was 0.1 ℃, humidity 1%RH.
Claims (5)
1. the two-wire system humiture transmitter with on-the-spot demonstration comprises shell (1), the sensor mounting pipe (2) that is connected with shell (1), ring flange (3), it is characterized in that:
The signal output part T of a, temperature sensing circuit (4) is connected with the input end of the temperature transmission circuit (6) of the input end of temperature digital display circuit (5), band constant current source; Temperature digital display (21) is arranged on the shell (1);
The signal output part H of b, humidity measuring circuit (8) is connected with the input end of the humidity transmission circuit (10) of the input end of humidity digital display circuit (9), band constant current source; Humidity digital indicator (22) is arranged on the shell (1);
The positive source of c, temperature transmission circuit (6) and humidity transmission circuit (10) is connected with the positive pole of external power supply (17) respectively, signal output part Tout, the Hout of temperature transmission circuit (6) and humidity transmission circuit (10) is connected with the positive pole of external temperature load (18) with humidity load (19) respectively, and the negative pole of external power supply (17) is connected with the negative pole of external temperature load (18) with humidity load (19) respectively.
2. the on-the-spot two-wire system humiture transmitter that shows of band according to claim 1, it is characterized in that: humiture testing circuit and transmission circuit (4,6,8,10) are arranged on the double-sided PCB (12), and temperature, humidity display circuit (5,9) are arranged on the double-sided PCB (13).
3. the on-the-spot two-wire system humiture transmitter that shows of band according to claim 2 is characterized in that: realize that by heavy gauge wire post (14) machinery and electric signal connect between the double-sided PCB (12,13).
4. the on-the-spot two-wire system humiture transmitter that shows of band according to claim 1 is characterized in that: the test side of sensor mounting pipe (2) is provided with microporous mesh probe protective cover (20), and probe protective cover (20) is threaded with sensor mounting pipe (2).
5. the on-the-spot two-wire system humiture transmitter that shows of band according to claim 1, it is characterized in that: the temperature sensor (15) in the temperature sensing circuit (4) adopts the integrated temperature-sensing element of high precision, and the humidity sensor (16) in the humidity measuring circuit (8) adopts the wet element of condenser type sense.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203001571U CN201173830Y (en) | 2007-12-21 | 2007-12-21 | Two-wire system humiture transmitter with on-site display |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2007203001571U CN201173830Y (en) | 2007-12-21 | 2007-12-21 | Two-wire system humiture transmitter with on-site display |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201173830Y true CN201173830Y (en) | 2008-12-31 |
Family
ID=40200957
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2007203001571U Expired - Fee Related CN201173830Y (en) | 2007-12-21 | 2007-12-21 | Two-wire system humiture transmitter with on-site display |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201173830Y (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636190A (en) * | 2012-05-04 | 2012-08-15 | 郑州阜丰电子科技有限公司 | Explosion-proof temperature and humidity transmitter |
| CN104280052A (en) * | 2014-09-18 | 2015-01-14 | 昆明理工大学 | Circuit structure of compact type two-wire-system thermocouple transmitter and installing method thereof |
| CN104457311A (en) * | 2014-11-10 | 2015-03-25 | 镇江中化聚氨酯工业设备有限公司 | Vertical condenser for unsaturated polyester resin |
-
2007
- 2007-12-21 CN CNU2007203001571U patent/CN201173830Y/en not_active Expired - Fee Related
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102636190A (en) * | 2012-05-04 | 2012-08-15 | 郑州阜丰电子科技有限公司 | Explosion-proof temperature and humidity transmitter |
| CN102636190B (en) * | 2012-05-04 | 2015-04-22 | 郑州阜丰电子科技有限公司 | Explosion-proof temperature and humidity transmitter |
| CN104280052A (en) * | 2014-09-18 | 2015-01-14 | 昆明理工大学 | Circuit structure of compact type two-wire-system thermocouple transmitter and installing method thereof |
| CN104280052B (en) * | 2014-09-18 | 2017-06-13 | 昆明理工大学 | A kind of circuit structure and its installation method of pocket two-wire system Thermocouple Temperature Transmitter |
| CN104457311A (en) * | 2014-11-10 | 2015-03-25 | 镇江中化聚氨酯工业设备有限公司 | Vertical condenser for unsaturated polyester resin |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20081231 Termination date: 20100121 |