CN101201332B

CN101201332B - An Intelligent Suction Hygrometer

Info

Publication number: CN101201332B
Application number: CN2007101334654A
Authority: CN
Inventors: 周根明; 郭霆; 周云祥
Original assignee: Jiangsu University of Science and Technology
Current assignee: Jiangsu Yuan Yuan Instrument Group Co Ltd
Priority date: 2007-09-30
Filing date: 2007-09-30
Publication date: 2010-06-02
Anticipated expiration: 2027-09-30
Also published as: CN101201332A

Abstract

The invention provides an intellectual extraction hygrometer, which consists of a sampling tube, an intellectual module, a display and data output unit, a meter power supply, a dry bulb temperature sensor, a wet bulb temperature sensor, a dynamic pressure sensor, a minitype blower fan, a humidity absorbing material, a minitype ball cock, a water receptacle, water level electrodes, and a water replenishing capillary. The invention is technically characterized in that the sampling tube is matched with the minitype blower fan to ensure the air speed flowing through a wet bulb thermometer and to improve the accuracy of measurement of the hygrometer. In addition, the temperature sensor of the intellectual extraction hygrometer is not affected by the dew on the surface so that the intellectual extraction hygrometer has high accuracy of measurement in the high humidity areas. Compared with the prior hygrometer with a moisture sensitive sensor, the invention solves the problem of short service life of the sensor as no failure resulting from the surface contamination occurs. The invention has the advantages of high accuracy of measurement, wide measurement range, long performance life, capability of long-term on-line measurement, automatic fault detection and so on. The invention will certainly become an updated novel product in the measurement technology of parameters of ambient conditions.

Description

A kind of intelligent bleeder hygrometer

Technical field

The present invention relates to measurement instrument, more particularly relate to a kind of intelligent bleeder hygrometer.

Background technology

In ambient condition parameter measurement technology, Humidity Detection is an important parameter.Common Humidity Detection instrument has psychrometer, hair hygrometer, dew-point hygrometer and humidity-sensitive elements such as utilization pottery, semiconductor to make the hygrometer of sensor at present.Wherein the temperature sensitive type hygrometer has simple in structurely, and so the advantage that measurement range is wide, but need add manual intervention processes such as water is generally should not be as the usefulness of on-line detector table.And humidity-sensitive element type hygrometer is convenient for installation and maintenance, can be used as the usefulness of on-line detector table, but because the situation that exists surface contamination to lose efficacy, so its serviceable life is short, high humidity area measure precision is low.In addition, the stated accuracy of instrument and actual measurement precision are also closely related with the airflow state of measuring point, and this is to need to solve in present Humidity Detection instrument and the moisture measurement technology and the technical matters that is not resolved as yet.

Summary of the invention

Technical matters: in order to overcome the deficiency that above-mentioned hygrometer exists, improve hygroscopic performance, solve the technical issues that need to address in present Humidity Detection instrument and the moisture measurement technology.The invention provides a kind of intelligent bleeder hygrometer.

Technical scheme: for achieving the above object, a kind of intelligent bleeder hygrometer of the present invention is by sampling pipe, intelligent object, show and the data output unit, instrument power, dry-bulb temperature sensor, the wet temperature sensor of asking, dynamic pressure transducer, mini fan, hygroscopic material, miniature ball-cock assembly, water receptacle, level electrode, the moisturizing kapillary is formed, pass respectively in the respective aperture that has at described sampling pipe upper wall dry-bulb temperature sensor is installed, wet bulb temperature sensor, and dynamic pressure transducer, pass at described sampling pipe lower wall and to have and to install wet asking in the corresponding hole of temperature sensor water receptacle is installed, in described sampling pipe right-hand member pipe, mini fan is installed, described wet bulb temperature sensor end is with hygroscopic material, this hygroscopic material afterbody is put into water receptacle, this water

Moisturizing kapillary and level electrode are housed on the container, and this moisturizing capillary end is equipped with miniature ball-cock assembly.

Beneficial effect: a kind of intelligent bleeder hygrometer of the present invention, the coupling of sampling pipe and mini fan can guarantee to flow through the gas velocity of wet bulb thermometer in its technical scheme, the measuring accuracy that this has not only improved hygrometer itself has also improved the science to tested gas sample.The humidity value that is calculated by intelligent object by dry bulb and wet bulb temperature sensor signal is based upon on the accurate and reliable calorifics theory basis, and its theoretical precision is self-evident.Because the hygroscopic temperature probe of a kind of intelligent bleeder of the present invention is not subjected to the influence of surface sweating, make it have good measuring accuracy again in high humidity regions.And compare with the hygrometer of moisture sensor, the situation that does not exist surface contamination to lose efficacy is so solved sensor short problem in serviceable life.

In addition, the miniature ball-cock assembly that is placed in moisturizing capillary end in the water receptacle can keep the water level of water receptacle automatically, thereby, not needing artificial recharge, this just provides necessary condition for long-term on-line measurement.

When making the instrument dehydration owing to other reason besides, the signal of level electrode can impel intelligent object to send alerting signal.If when making sampling air flow obstructed for a certain reason, the dynamic pressure transducer signal can impel intelligent object to send alerting signal.This has improved the hygrometer reliability of operation again greatly.

A kind of intelligent bleeder hygrometer of the present invention is compared with existing humidity measuring instrument and is had the following advantages:

1, measuring accuracy height, wide, the long service life of range ability.

2, on-line measurement for a long time is for the atmosphere control system provides technique guarantee.

3, automatic fault detects, the reliability height.

4, air current composition has improved accuracy and the science measured.

Description of drawings

Fig. 1: intelligent bleeder hygrometer schematic diagram

Among the figure: 1. level electrode 2. sampling pipes 3. sampling air flows 4. dry-bulb temperature sensors 5. wet bulb temperature sensors 6. dynamic pressure transducers 7. show and data output unit 8. instrument powers 9. intelligent objects 10. mini fans 11. hygroscopic materials 12. miniature ball-cock assembly 13. water receptacles 14. moisturizing kapillaries

Embodiment

The invention will be further described below in conjunction with accompanying drawing.

As shown in Figure 1: pass installation dry-bulb temperature sensor 4, wet bulb temperature sensor 5 and dynamic pressure transducer 6 in the respective aperture that has respectively at sampling pipe 2 upper walls, sampling pipe 2 lower walls pass to have and install installs water receptacle 13 in the wet bulb temperature sensor 5 corresponding holes; In sampling pipe 2 right-hand member pipes, adopt the support mode that mini fan 10 is installed; At the end of wet bulb temperature sensor 5 socket hygroscopic material 11, hygroscopic material 11 afterbodys are put into water receptacle 13, installing moisturizing kapillary 14 and level electrode 1 are installed miniature ball-cock assembly 12 in moisturizing kapillary 14 ends on water receptacle 13.

During measurement sampling pipe 2 is put into test environment,, and be moisturizing kapillary 14 connection water sources so that sampling air flow 3 flows through sampling pipe 2 smoothly with certain speed.

Four road signals of dry-bulb temperature sensor 4, wet bulb temperature sensor 5, dynamic pressure transducer 6, level electrode 1 are inserted intelligent object 9.By design programming to intelligent object 9, calculate the humidity value and the fault alarm value of the air-flow of surveying, its output signal is imported into and is shown and data output unit 7, with measured value and the situation of demonstration with output meter.

Instrument power 8 inserts intelligent object 9 and mini fan 10 respectively and provides working current for intelligent object 9 and mini fan 10.

Claims

1. An intelligent suction type hygrometer is characterized in that: the hygrometer consists of a sampling tube (2), an intelligent module (9), a display and data output unit (7), an instrument power supply (8), a dry bulb temperature Sensor (4), wet bulb temperature sensor (5), dynamic pressure sensor (6), micro fan (10), hygroscopic material (11), micro float valve (12), water container (13), water level electrode (1) , replenishment capillary (14) composition; Wherein, dry bulb temperature sensor (4), wet bulb temperature sensor (5) and dynamic pressure sensor (5) are installed in the corresponding hole that passes through respectively on the upper wall of described sampling tube (2) Sensor (6); the water container (13) is installed in the hole corresponding to the position where the wet bulb temperature sensor (5) is installed through the lower wall of the sampling pipe (2); in the sampling pipe (2) ) a micro fan (10) is installed in the right end pipe; the end of the wet bulb temperature sensor (5) is also covered with a hygroscopic material (11), and the tail of the hygroscopic material (11) is put into the water container (13), and the water container (13) is also equipped with replenishment capillary (14) and water level electrode (1), and this replenishment capillary (14) end is also equipped with miniature float valve (12); In addition, described dry bulb temperature sensor (4), The four signals of the wet bulb temperature sensor (5), the dynamic pressure sensor (6), and the water level electrode (1) are respectively connected to the intelligent module (9), and the measured air flow rate is calculated by programming the intelligent module (9). Humidity value and fault alarm value, the output signal of which is transmitted to the display and data output unit (7) to display and output the measured value and status of the instrument; the instrument power supply (8) is respectively connected to the intelligent module (9) and the micro The blower fan (10) also provides working current for the intelligent module (9) and the micro blower fan (10).

2. An intelligent suction type hygrometer according to claim 1, characterized in that: the installation of the micro fan (10) in the right end of the sampling pipe (2) is a pillar type or a bracket type.