RU73978U1 - HUMIDITY SENSOR FOR AEROLOGICAL RADIO PROBE - Google Patents

Abstract

The humidity sensor for an aerological radiosonde belongs to meteorology and is designed to measure humidity using a radiosonde that transmits the measurement results to a meteorological station during its rise in the atmosphere. The humidity sensor for the aerological radiosonde is a multilayer, capacitive sensing element in the form of a rectangular plate with three electrically conductive contacts connected to a power source and a voltage meter. What is new in it is that the sensitive element of the humidity sensor for the aerological radiosonde is placed in a light-, electro-shielding cap made of hydrophobic material or coated with it and providing access of ambient air inside the cap to the sensitive element. An option is a humidity sensor for an aerological radiosonde in which slots and / or holes are made in the shielding cap to prevent direct light from entering a sensitive element, such as blinds. An option is a humidity sensor for an aerological radiosonde, in which the shielding cap inside and / or outside and / or in its mass is metallized, for example, equipped with a metal mesh.

Description

The humidity sensor for an aerological radiosonde belongs to meteorology and is designed to measure humidity using a radiosonde that transmits the measurement results to a meteorological station during its rise in the atmosphere.

A known humidity sensor for an aerological radiosonde of the RKZ-5 type (Khrgian A.Kh. Atmospheric Physics. - M .: Gidrometizdat, 1978, p.25.), Containing a moisture-sensitive organic film in a stretched position and connected with a rheostat engine, whose resistance is measured and transmitted using a radiosonde.

But the closest of the analogues to the claimed object is a Honeywell moisture sensor (see Honeywell brochure attached to the application: HIH-4000 Series.

Humidity Sensors, 2005, p. 4). HIH-4000 series of humidity sensor (sensor) is designed for high production volumes of equipment with a linear voltage output from 0 to 4 V in the range of relative humidity from 0 to 100% at temperatures from -40 to +80 C with a standard current range from 0 up to 200 μA. The sensor is ideal for measuring low atmospheric humidity. This humidity sensor measures relative humidity with high accuracy. The advantages of the humidity sensor allow, after its refinement, to be used as a humidity sensor for an aerological radiosonde.

The new humidity sensor for the aerological radiosonde is also a multilayer, thermoplastic, capacitive sensitive element in the form of a rectangular plate with three electrically conductive contacts connected to a power source, a voltage meter.

New in it is that the sensitive element of the humidity sensor for the aerological radiosonde is placed in a light-, electro-shielding cap made of hydrophobic material or coated with it and providing

access of ambient air inside the cap to the sensing element.

An option is a humidity sensor for an aerological radiosonde in which slots and / or holes are made in the shielding cap to prevent direct light from entering a sensitive element, such as blinds.

An option is a humidity sensor for an aerological radiosonde, in which the shielding cap inside and / or outside and / or in its mass is metallized, for example, equipped with a metal mesh.

The technical result of the new humidity sensor for the aerological radiosonde is to reduce the dimensions and mass of the humidity sensor, as well as to increase the sensitivity and accuracy of humidity measurement in comparison with analogues due to the use of a new sensitive element of smaller sizes and accuracy. But most importantly, the influence of sunlight on the sensitive element during the rise of the radiosonde during the day, as well as electrostatic electricity, which is abundant in the free atmosphere, especially in pre-thunderstorm, thunderstorm and post-thunderstorm days and hours, has been eliminated.

The drawing shows a humidity sensor for upper-air radiosonde in section. It contains a sensing element 1 with electrical contacts 2, a shielding cap 3 with slots 4 and light screens 5. Slots 4 are sized and oriented obliquely so that light from the sun passes past the sensitive element 1. They are additionally covered by light screens 5.

The humidity sensor for aerological radiosonde works as follows. When the radiosonde rises in the atmosphere, air through the slots 4 enters the shielding cap 1 to the sensing element 1, which measures the relative humidity and, through the electrical contacts 2, the signal enters the radio transmitter. Since the light does not reach the sensitive element 1, it does not heat it up and does not distort the measurements. Also, static atmospheric electricity due to the presence of a shielding cap 3 does not affect the measurement of the sensitive element 1.

Claims (3)

1. The humidity sensor for the aerological radiosonde, which is a multilayer, capacitive, sensitive element in the form of a rectangular plate with three electrically conductive contacts connected to a power source and a voltage meter, characterized in that the humidity sensor element for the aerological radiosonde is placed in a light, electro-shielding cap made of hydrophobic material or coated with it and providing access of ambient air inside the cap to the core real element. 2. The humidity sensor for the aerological radiosonde according to claim 1, characterized in that slots and / or holes are made in the shielding cap to prevent direct light from entering the sensing element, for example, blinds. 3. The humidity sensor for the aerological radiosonde according to claim 1, characterized in that the shielding cap inside and / or outside and / or in its mass is metallized, for example, with a metal mesh.