Messsonde

Abstract

Measuring probe (4) for determining the density of liquids (3), comprising: 1.1. a probe base body (5) with a liquid inlet opening (8), 1.2. a float (6) arranged in the probe base body (5), 1.3. a drive unit (11) for generating a drive force on the float (6), 1.4. at least one float detection device (12, 13) for determining the float position and 1.5. at least one control unit which is in signal communication with the drive unit (11) and / or the float detection unit (12, 13) and is designed to calculate the liquid density.

Claims

[1] Measuring probe (4) for determining the density of liquids (3), comprising: 1.

1. a probe body (5) with a liquid inlet opening (8), 1.

2. a float (6) arranged in the probe body (5), 1.

3. a drive unit (11) for generating a drive force on the float (6), 1.

4. at least one float detection device (12, 13) for determining the float position and 1.

5. at least one control unit which is in signal connection with the output unit (11) and / or the float detection unit (12, 13) and is designed to calculate the liquid density. [2] Measuring probe (4) according to claim 1, characterized by that the float (6) at least partially comprises a ferromagnetic region. [3] Measuring probe (4) according to one of the preceding claims, characterized bythat the output unit (11) is designed as a magnetic field generating component. [4] Measuring probe (4) according to one of the preceding claims, characterized by that the float detection unit (12, 13) comprises two coils. [5] Measuring probe (4) according to one of the preceding claims, characterized by that the control unit comprises a capacitor and a resistor forming an RC component with a discharge half-life T H where: 0.1 s ≤ T H ≤ 5 s [6] Method for measuring the density of liquids (3) with at least one measuring probe (4) according to one of claims 1 to 5, comprising the following steps: 6.

1. Providing a liquid (3), 6.

2. Submerging at least one measuring probe (4) in the liquid (3), 6.

3. Applying a propulsion force to the float (6) with the propulsion unit (11), 6.

4. Deactivation of the output unit (11) after a delay time, 6.

5. Detecting the position of the float (6) with the float detection unit (12, 13), 6.

6. Detecting the float buoyancy duration with the control device comprising a capacitor and a resistor, and 6.

7. Calculate the density of the liquid (3) from the determined state data of the float (6). [7] Method according to claim 6, characterized by that the capacitor is at least partially charged. [8] Method according to claim 7, characterized by that the capacitor is at least partially discharged when the output unit (11) is deactivated. [9] Method according to claim 8, characterized by that the float buoyancy duration is determined via the residual voltage of the capacitor. [10] Method according to claim 6, characterized by that a magnetic force is generated by the output unit (11). [11] Method according to claim 6, characterized by that the float detection unit (12, 13) generates a time-varying magnetic field. [12] Method according to claim 11, characterized by that the float detection unit (12, 13) detects the magnetic response of the float (6).

Images