TW201319557A - Humidity detector and detection method thereof - Google Patents

Abstract

A humidity detector comprises a first conductor, a second conductor a power supply circuit and a current sensing circuit, wherein the two conductors are close to each other but spaced by a predetermined distance. The power supply circuit is electrically connected to the two conductors to provide a high voltage to the first conductor. The current sensing circuit is electrically connected to one of the two conductors to detect the current variation thereof when moisture enters between the two conductors and output a signal corresponding to the current variation. In addition, this invention further provides a corresponding humidity detection method.

Description

Humidity detecting device and detecting method thereof

The present invention relates to humidity detection, and more particularly to a humidity detecting device and a detecting method thereof.

With the advancement of the industrial and technological industries, the impact of humidity on process, product maintenance, or product operation is also receiving increasing attention. The conventional humidity detecting device is roughly classified into two types: mechanical type and electronic type. Generally, the mechanical type humidity detecting device is mostly used as a switch, and the inside is provided with a film, and when the film is absorbing moisture, The phenomenon of elongation and elongation is generated, whereby the different lengths of the film at different relative humidity can be utilized to conduct the conduction of the switch contacts. However, although this type of switch has high accuracy, it has the disadvantage of being bulky and cannot output signals to other instruments as a basis for humidity detection.

Most of the electronic humidity detecting devices are composed of small electronic chips or electronic circuits, and most of them contain an infrared type humidity sensor for detecting the relative humidity through the humidity sensor and outputting according to the detection result. Different voltages can be displayed simultaneously with relative humidity. However, although the above-mentioned electronic humidity detecting device is small and convenient, it can output a signal to display the humidity at that time, but it also has the disadvantage that the detection error value is still large due to environmental influence, and it is well known that the electronic When the wafer product is operated in a high temperature environment, it is easy to have a burnt or overheating fault, and the electronic temperature detecting device cannot work in a high temperature environment. Therefore, in summary, it can be known that the conventional temperature detecting device is still not perfect, and there is still room for improvement.

In view of this, the main object of the present invention is to provide a humidity detecting device and a detecting method thereof, which are not only accurate in measurement but also applicable to a high temperature environment.

In order to achieve the above object, the humidity detecting device provided by the present invention comprises a first conductor, a second conductor, a power supply circuit and a current sensing circuit, wherein the two conductors are close to each other but spaced apart by a predetermined distance; The power supply circuit is electrically connected to the two conductors for supplying a high voltage to the first conductor; the current sensing circuit is electrically connected to one of the two conductors for detecting moisture entering the two conductors During the time, the current on one of the two conductors changes, and a signal corresponding to the current change is output.

According to the above concept, the humidity detecting device further includes an arithmetic circuit coupled to the current sensing circuit for receiving the signal output by the current sensing circuit, and calculating the moisture of the water according to the received signal.

According to the above concept, the humidity detecting device further includes an adjusting circuit disposed between the operating circuit and the current sensing circuit for adjusting a signal output by the current sensing circuit to the operating circuit.

According to the above concept, a display device is further included, and is electrically connected to the operation circuit for displaying the moisture of the water and gas calculated by the operation circuit.

According to the above concept, the present invention further provides a humidity detecting method, which comprises the following steps:

A. Set two conductors that are close to each other but spaced apart by a predetermined distance to the humidity to be tested;

B. providing a high voltage to one of the two conductors;

C. detecting a change in current on one of the two conductors when moisture enters between the two conductors;

D. According to the current change measured in step C, a signal corresponding to the current change is output.

According to the above concept, the temperature detecting method further includes a step E of receiving the signal output by the current sensing circuit and calculating the moisture of the water according to the received signal.

According to the above concept, in step E, before receiving the signal output by the current sensing circuit, the signal outputted to the arithmetic circuit by the current sensing circuit is adjusted.

According to the above concept, the temperature detecting method further comprises a step F, which displays the calculated moisture of the water and gas.

Therefore, the design of the humidity detecting device and the detecting method thereof can not only make the humidity measurement more accurate, but also can be applied to a high temperature environment.

In order that the present invention may be more clearly described, the preferred embodiments are illustrated in the accompanying drawings.

Referring to FIG. 1 , a humidity detecting device according to a preferred embodiment of the present invention mainly includes a first conductor 11 , a second conductor 12 , a power supply circuit 20 , and a current sensing circuit 30 . Wherein: the two conductors 11, 12 are close to each other but spaced apart by a predetermined distance. In this embodiment, the two conductors 11 and 12 are probe-shaped and made of a metal material, but are not limited thereto.

The power supply circuit 20 is electrically connected to the two conductors 11 and 12 for supplying a high voltage to the first conductor 11. In this embodiment, the power supply circuit converts the received electrical energy into a high-voltage electrical energy output through an isolation transformer (Isolation Transformer), but is not limited thereto.

The current sensing circuit 30 is electrically connected to one of the two conductors 11 and 12 for detecting a change in current on one of the two conductors 11 and 12. In the present embodiment, the current sensing circuit 30 is electrically connected to the first conductor 11, but is not limited thereto, and may be electrically connected to the second conductor 12.

Thereby, the purpose of detecting the humidity change at a humidity to be measured is achieved by using the above-mentioned structural design and through the humidity detecting method described below. Referring to FIG. 2, the humidity detection method includes the following steps:

A. The two conductors 11, 12 which are close to each other but spaced apart by a predetermined distance are disposed at the humidity to be tested. Thereby, the air between the two conductors 11 and 12 forms a high resistance region, and the resistance of the high resistance region is proportional to the distance between the two conductors 11, 12, that is, when the two conductors 11 and 12 are The larger the distance, the higher the resistance of the high resistance region, and the lower the distance between the two conductors 11, 12, the lower the resistance of the high resistance region.

B. Providing a high voltage to one of the two conductors 11, 12. In the present embodiment, the power supply circuit 20 is used to supply a high voltage to the first conductor 11, but not limited thereto. Therefore, when a sufficiently high voltage is supplied to the first conductor 11, an arc phenomenon is generated to turn on the first conductor 11 and the second conductor 12 such that the first conductor 11 and the second conductor 12 are connected in series. And a small amount of current is generated.

C. detecting a change in current on one of the two conductors 11, 12. That is, when the humidity at the humidity to be measured rises, it means that the moisture content in the air between the two conductors 11 and 12 is increased, so that the resistance of the high resistance region is lowered, and the first conductor 11 is caused to The trace current on the second conductor 12 is increased. Conversely, when the humidity at the humidity to be measured decreases, a slight amount of current on the first conductor 11 and the second conductor 12 is lowered. In the present embodiment, the current sensing circuit 30 is used to detect the current change on the first conductor 11, but is not limited thereto.

D. According to the current change measured in step C, the current sensing circuit 30 will output a signal corresponding to the current change. Thereby, the current output on the two conductors 11 and 12 can be obtained by analyzing the signal outputted by the current sensing circuit 30, and the humidity change at the humidity to be measured can be further derived.

In addition, referring to FIG. 3, in order to make the humidity detecting device applicable to various environments, the humidity detecting device of the present invention may further include an adjusting circuit 40 and the current sensing circuit 30 under the structure of FIG. The sexual connection is used to perform a step E after the step D, and the signal output by the current sensing circuit 30 is adjusted according to the user's requirement, so that the humidity detecting device can be more accurate when measuring the humidity. In this embodiment, the adjustment circuit 40 is mainly composed of a multiplication circuit and a subtraction circuit for performing zeroing, fine adjustment, amplification, etc. on the output signals of the current sensing circuit 30, but the circuit design is not This is limited to this.

In addition, in order to make the user more convenient in detecting the humidity, please refer to FIG. 4 , the humidity detecting device of the present invention is further provided with an arithmetic circuit 50 and a display device 60 under the structure of FIG. 3 , the operation circuit The current sensing circuit 30 is coupled to the current sensing circuit 30 such that the adjustment circuit 40 is located between the operational circuit 50 and the current sensing circuit 30. The display device 60 is electrically connected to the arithmetic circuit 50. Therefore, through the above design, after the signal outputted by the current sensing circuit 30 is adjusted in step E, the signal output by the current sensing circuit 30 and adjusted by the adjusting circuit 40 is received by the arithmetic circuit 50, according to the The received signal calculates the moisture of the water vapor. After the step E, a step F is further executed, and the moisture of the water and gas calculated by the arithmetic circuit 50 is displayed through the display device 60. In this way, the user can directly observe the measured display device 60 to know the measured moisture of the water and gas, without further performing measurement procedures such as measurement and conversion, thereby greatly increasing the speed of the measurement, so that the user can It is more convenient to detect humidity.

It is worth mentioning that, in an environment that is stable and not too adjusted, the operation circuit 50 can be directly connected to the current sensing 30 circuit without using the adjustment circuit 40, so that the step E is executed. The operation circuit 50 directly receives the signal output by the current sensing circuit 30, and calculates the moisture of the water and gas according to the received signal, thereby achieving the same purpose.

In addition, in order to make the above structure applicable to a high temperature environment, referring to FIG. 5, the humidity detecting device of the present invention is separated by a remote connection, so that the user can detect the humidity through the humidity detecting device. The two conductors 11, 12 need only be placed at the humidity to be tested to achieve the effect of humidity detection. In addition, in order to enable the detecting humidity device to detect the humidity more stably, the humidity detecting device of the present invention further comprises a casing 70 made of a material resistant to high temperature and having heat insulation and insulation effects, and The two conductors 11 and 12 are connected to cover the two conductors 11 and 12, and the two conductors 11 and 12 are partially exposed outside the casing 70, thereby achieving the purpose of fixing the position and spacing of the two conductors 11, 12. Thereby, through the above design, the influence of the high temperature on the humidity detecting device can be greatly insulated, and the humidity detecting device of the present invention can not only make the humidity measurement more accurate, but also can be applied to various environments.

The above description is only for the preferred embodiment of the present invention, and the equivalent structure and method variations of the present invention and the scope of the patent application are intended to be included in the scope of the present invention.

11. . . First conductor

12. . . Second conductor

20. . . Power supply circuit

30. . . Current sensing circuit

40. . . Adjustment circuit

50. . . Operation circuit

60. . . Display device

70. . . case

1 is a structural view of a humidity detecting device of the present invention.

2 is a flow chart of a humidity detecting method according to the present invention.

FIG. 3 shows an adjustment circuit added under the architecture of FIG. 1.

FIG. 4 shows an arithmetic circuit and a display device added to the architecture of FIG. 3.

Figure 5 reveals the split circuit design under the architecture of Figure 4.

11. . . First conductor

12. . . Second conductor

20. . . Power supply circuit

30. . . Current sensing circuit

40. . . Adjustment circuit

50. . . Operation circuit

60. . . Display device

70. . . case

Claims (11)

A humidity detecting device comprising: a first conductor; a second conductor adjacent to the first conductor but spaced apart by a predetermined distance; a power supply circuit electrically connected to the two conductors for supplying a high voltage The first conductor; and a current sensing circuit electrically connected to one of the two conductors for detecting a change in current of one of the two conductors when water vapor enters between the two conductors, And output a signal corresponding to the current change. The humidity detecting device of claim 1, further comprising an arithmetic circuit coupled to the current sensing circuit for receiving the signal output by the current sensing circuit, and calculating the moisture of the water according to the received signal. The humidity detecting device of claim 2, further comprising an adjusting circuit disposed between the operating circuit and the current sensing circuit for adjusting a signal output by the current sensing circuit to the operating circuit. The humidity detecting device of claim 2, further comprising a display device electrically connected to the computing circuit for displaying the moisture of the water and gas calculated by the computing circuit. The humidity detecting device of claim 1, further comprising an adjusting circuit electrically connected to the current sensing circuit for adjusting a signal output by the current sensing circuit. The humidity detecting device of claim 1, further comprising a casing connected to the two conductors to cover the two conductors, and the two conductor portions are exposed outside the casing. A humidity detecting method for detecting a humidity change at a humidity to be measured; the humidity detecting method comprises the following steps: A. setting two conductors that are close to each other but spaced apart by a predetermined distance at the humidity to be tested; B. providing a high voltage to one of the two conductors; C. detecting a change in current on one of the two conductors; D. outputting a signal corresponding to the change in current according to the change in current measured in step C. The method for detecting humidity according to claim 7 further includes a step E of receiving a signal output by the current sensing circuit and calculating a moisture level according to the received signal. The humidity detecting method according to claim 8, wherein in step E, before receiving the signal output by the current sensing circuit, the signal outputted to the operating circuit by the current sensing circuit is adjusted. The humidity detecting method according to claim 8, further comprising a step F for displaying the calculated moisture of the water and gas. The method for detecting humidity according to claim 7 further includes a step E of adjusting a signal output by the current sensing circuit to the operation circuit.