System for data transmission

• US 4,983,964 A
• Filed: 06/29/1988
• Issued: 01/08/1991
• Est. Priority Date: 07/01/1987
• Status: Expired due to Fees

• Current Assignee: Elektriciteit VOOR Goederenbehandeling Marine EN Industrie In HET Verkort "Egemin" Naamloze Vennootschap
• Original Assignee: Elektriciteit VOOR Goederenbehandeling Marine EN Industrie In HET Verkort "Egemin" Naamloze Vennootschap
• Inventors: Van de Pas, Leo
• Primary Examiner(s): NOT, DEFINED
• Assistant Examiner(s): Lau, Yuk H.
• Application Number:
  US07/212,791
• Time in Patent Office: 923 Days
• Field of Search: 340/870.31, 340/623, 340/624, 340/870.37, 340/620, 73/309, 73/308, 73/291, 73/292, 73/304 C, 73/290 R, 324/127, 324/58 R, 324/61 R, 374/142
• US Class Current: 340/870.31
• CPC Class Codes: G01D 5/24 by varying capacitance
• CPC Class Codes: G01F 23/44 using electrically actuated indicating means
• CPC Class Codes: G01F 23/46 using magnetically actuated indicating means
• CPC Class Codes: G01F 23/60 using electrically actuated indicating means
• CPC Class Codes: G01F 23/62 using magnetically actuated indicating means

Abstract

A system for the transmission of data in a measuring instrument includes a measuring device is being introduced in a medium in order to measure specific properties thereof and with which these measuring data are being transmitted. The system includes autonomous and active measuring device; a freely movable electrically conductive element with which the measuring device is connected; a signal receiving unit where through or along which, the electrically conductive element, without making physical or galvanic contact, can move freely; a signal processing unit which is electrically connected with the signal receiving unit and a direct or indirect electric connection between the electrically conductive and freely movable element and the medium to be tested.

Claims

1. System for the transfer of data in a measuring instrument, whereby a measuring device is being introduced in a medium housed in a receptacle in order to measure specific properties of said medium and to transfer the measuring data, comprising:

an autonomous active measuring device;

a freely movable electrically conductive element to which the autonomous active measuring device is connected;

a signal reception unit through which the electrically conductive element, without making a physical or galvanic contact, can move freely;

a signal processing unit connected electrically to the signal reception unit; and

an electrical connection located outside of said signal reception unit connecting the electrically conductive freely moveable element and the medium to be tested.

2. System according to claim 1, wherein the freely movable electrically conductive element comprises a rod.

3. System according to claim 1, wherein the freely movable electrically conductive element comprises a wire or a cable.

4. System according to claim 1, wherein the freely movable electrically conductive element is connected with a position measuring device.

5. System according to claim 4, wherein the position measuring device is constructed in the shape of a drum.

6. System according to claim 1, wherein the signal reception unit comprises a transformer composed of a magnetic core and a toroidal coil wound around it.

7. System according to claim 6, wherein the magnetic core is a ring core.

8. System according to claim 6, wherein the toroidal coil is connected with a signal processing unit.

9. System according to claim 1, wherein the freely movable electrically conductive element, is connected electrically with an electrically conductive body that is located in the medium to be tested.

10. System according to claim 1, wherein the freely movable electrically conductive element is connected electrically with an electrically conductive housing of the receptacle in which the medium to be inspected to located.

11. System according to claim 9, wherein the electric connection is established between the electrically conductive body, and, respectively, the receptacle in which the medium is located, and the position measuring device.

12. System according to claim 1, wherein a primary electric circuit of the signal reception unit comprises the autonomous active measuring device;

the electrically conductive freely movable measuring element to which the autonomous active measuring device is connected;

an electric connection comprising the electric connection between the electrically conductive freely movable measuring element and the electrically conductive element placed in the medium and an electrically conductive housing of the receptacle; and

the range capacity of the capacitor which is being built up by the housing of the autonomous active measuring device and the electrically conductive element and the receptacle.

13. System according to claim 1, wherein a secondary electric circuit of the signal reception comprises a toroidal coil of a magnetic core and the signal processing unit.

14. System according to claim 1, wherein the autonomous active measuring device comprises an electrically conductive housing equipped with one or more sensors which are electrically connected with a measuring signal receiving unit which is in turn connected with a measuring signal converter electrically connected with the freely movable electrically conductive element.

15. System according to claim 14, wherein the measuring signal converter is connected electrically, on one hand, with the conductive parts of the electrically conductive housing, and, on the other hand, with the freely movable electrically conductive element (4).

16. System according to claim 14, wherein said sensors are placed within an electrically conductive housing.

17. System according to claim 14, wherein said sensors reach through an electrically conductive housing to the outside of said housing.

18. System according to claim 14, wherein the autonomous active measuring device is completely surrounded by an electrically insulating layer.

19. System according to claim 14, wherein the autonomous active measuring device contains a memory.

20. System according to claim 14, wherein the autonomous active measuring device contains a time recording unit.