CN2857002Y

CN2857002Y - Inside relative moisture analyzer for concrete

Info

Publication number: CN2857002Y
Application number: CN 200520038745
Authority: CN
Inventors: 蒋正武
Original assignee: Tongji University
Current assignee: Tongji University
Priority date: 2005-01-05
Filing date: 2005-01-05
Publication date: 2007-01-10
Anticipated expiration: 2015-01-05

Abstract

The utility model relates to an internal relative humidity detection device for concrete, which comprises a probe comprising a housing, a humiture sensor arranged at the top of the housing and a sealing baffle plate arranged between the humiture sensor and the leads; and a display device. The device further comprises a rubber sealing ring surrounding the outer side of the housing. The humiture sensor may be a monolithic processor comprising a capacity humidity sensor and a temperature sensor. The inner side of the probe adopts a baffle plate sealing technology so that the exchangeable air volume of the concrete internal measuring hole into which the probe inserts is smaller to improve the measuring accuracy and depress the measuring error. The utility model can effectively improve the measuring accuracy in particular to the concrete having a lower inside humidity and very little exchangeable moisture. Furthermore, a rubber sealing ring is provided at the outer side of the probe to ensure the sealing performance of the internal porosity of the concrete so as to depress the moisture exchanging between the internal holes and outside surroundings and improve the measuring accuracy.

Description

Inside concrete relative humidity determinator

Technical field

The utility model relates to a kind of measurement test device system, particularly a kind of digital, measure the mortar that hardens in the buildings or the device of concrete relative humidity rapidly, continuously.

Background technology

The distribution of internal void relative humidity is not only directly related with the influence of shrinking, creep, thermal expansion and counter stress state, bending and crack forming in the xoncrete structure, and hole relative humidity directly influences heat conductivity, hydration rate or degree of ripeness.Simultaneously, it plays the significant effects effect to concrete durability and refractability.Modern concrete, especially high-strength and high performance concrete is compared with normal concrete, and is low because of its water cement ratio, mix feature such as active admixture, and micromechanism is fine and close more, its moisture diffusion non-linear more obvious.Measuring and study the distribution of inside concrete relative humidity has great importance to the application of instructing xoncrete structure.

At home, build the reasonable instrument that does not still have measurement maturing internal relative humidity in the boundary at present.Their humidity detects by an unaided eye, judges by rule of thumb with the expert entirely, thereby error is very big.Abroad, adopt methods such as NEUTRON METHOD, x-ray method to measure concrete humidity, but implement these methods the apparatus structure complexity, bulky, operation is complicated, cost an arm and a leg, should not use at the scene.And this quasi-instrument is not seen introduction at home.At present, adopted capacitance probe to measure inside concrete relative humidity abroad.The domestic utilization sine wave of having developed is measured concrete humidity, and has applied for patent, also adopts common dew point hygrometer to measure concrete internal relative humidity in addition.Then, these method of testings still exist a lot of shortcomings with not enough with device, and mainly show: test probe is too big, the wetting balance time is long, and measuring accuracy is lower, and error is too big, there is drift in test value, and more prior deficiency is not design according to xoncrete structure.The proving installation of developing a kind of novel fast measuring inside concrete relative humidity has great importance.

Summary of the invention

The purpose of this utility model is to provide a kind of high precision measurement device, but fast measuring inside concrete relative humidity can be widely used in the mensuration of the internal relative humidity in fields such as xoncrete structure in the buildings, the impaired xoncrete structure of fire.

For reaching above-mentioned purpose, the utility model adopts following technical scheme:

A kind of inside concrete relative humidity determinator comprises probe, and described probe comprises shell, places the Temperature Humidity Sensor in the shell top, is provided with a seal diaphragm between described Temperature Humidity Sensor and lead.

As a kind of improvement of the present utility model, be wound with an O-ring seal at described shell outer ring.

As a kind of mode of priority of the present utility model, being shaped as of described probe is cylindrical.

The utility model has taken into full account the characteristics of concrete material, especially characteristics of when different length of time, testing, dividing plate encapsulation process technology has been adopted in probe inside, it is less that feasible probe enters the tradable air volume of inside concrete instrument connection, thereby improved the inside concrete measuring accuracy, reduced test error.Especially for the considerably less high performance concrete of lower, the tradable moisture of interior humidity, can improve measuring accuracy effectively.In addition, the outside preparation of probe rubber seal improves the sealing that guarantees the inside concrete hole, reduces the exchange of moisture of inside concrete hole and external environment, improves the precision of test.This proving installation can be measured the device of the humiture of inside concrete rapidly, continuously, can be widely used in concrete performance test, the research.Also can be applied to the test of the relative humidity of other building materials inside.

Description of drawings

Fig. 1 is the device to test synoptic diagram of inside concrete relative humidity

Fig. 2 is a relative humidity test probe synoptic diagram

Embodiment

Below the utility model is described in further detail to closing drawings and Examples.

As shown in Figure 1 and Figure 2, a kind of inside concrete relative humidity determinator, comprise probe 1, digital indicator 2 and computing machine 3, described probe 1 comprises shell, places the Temperature Humidity Sensor 5 in the shell top, be provided with a seal diaphragm 7 between described Temperature Humidity Sensor 5 and lead 6, the outer ring of described shell is wound with a rubber seal 8.

Among the utility model embodiment, except that the seal diaphragm 7 and rubber seal 8 of probe 1, remaining part as Temperature Humidity Sensor 5, digital indicator 2 and computing machine 3 etc., is prior art.For further specifying the utility model structure and using method thereof, the principle of work to Temperature Humidity Sensor 5, digital indicator 2 and computing machine 3 briefly introduces below.

Wherein, described Temperature Humidity Sensor 5 is the single chip circuit of digital Temperature and Humidity meter, and it adopts directly the mounted on surface mode of Chip Packaging on the PCB circuit board, by quartz crystal, imitate positive electric capacity, reset circuit etc., enters original state after the energising.The analog quantity that humiture is changed by two temperature sensors and humidity sensor, through three I/O mouths inputs of IC, sample circuit per 10 second once sampling, through A/D converter analog quantity is converted to digital quantity then.Temperature Humidity Sensor 5 is put into the certain specification cylindrical probe, and the probe inner sensor is connected on digital indicator 2 and the computing machine 3 by the lead 6 of certain-length, directly storage or demonstration.

To pop one's head in during use in the 1 insertion concrete 4, regulate rubber seal 8, guarantee the sealing of inside concrete hole.

This test probe adopted up-to-date have only several square millimeters the Temperature Humidity Sensor chip, it is little to have a volume, the test probe of preparing is very little.Therefore, the basic characteristics that not only possess general relative humidity test probe.Also can prepare difform probe, as thin right cylinder, sphere etc. according to the test needs.Use this proving installation can measure the device of the humiture of inside concrete rapidly, continuously.This device can be widely used in also can being applied to the test of the relative humidity of other building materials inside in concrete performance test, the research.

The utility model is not limited to the structure of above-mentioned embodiment; the utility model can also have other malformation; for example; described probe shape can be spherical or other shape; test data also can adopt non-lead modes such as wireless telecommunications to transfer on the display device; as long as adopted between the Temperature Humidity Sensor of described probe and lead and be provided with this architectural feature of seal diaphragm, all dropped within the protection domain of the present utility model.

Claims

1, a kind of inside concrete relative humidity determinator comprises probe, and described probe comprises shell, places the Temperature Humidity Sensor in the shell top, it is characterized in that: be provided with a seal diaphragm between described Temperature Humidity Sensor and lead.

2, inside concrete relative humidity determinator according to claim 1 is characterized in that: be wound with an O-ring seal at described shell outer ring.

3, inside concrete relative humidity determinator according to claim 1 and 2, it is characterized in that: being shaped as of described probe is cylindrical.