CN2828888Y - Sulfur hexafluoride density controller with telemetering function - Google Patents
Sulfur hexafluoride density controller with telemetering function Download PDFInfo
- Publication number
- CN2828888Y CN2828888Y CN 200520078347 CN200520078347U CN2828888Y CN 2828888 Y CN2828888 Y CN 2828888Y CN 200520078347 CN200520078347 CN 200520078347 CN 200520078347 U CN200520078347 U CN 200520078347U CN 2828888 Y CN2828888 Y CN 2828888Y
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- Prior art keywords
- sulfur hexafluoride
- density controller
- hexafluoride density
- movement
- utility
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Abstract
The utility model relates to a sulfur hexafluoride density controller with a remote transmitting function, which belongs to monitoring equipment for high voltage electric apparatus. The utility model is characterized in that an oscillating unit with an angular displacement measuring instrument is connected with an oscillating frequency measuring unit; the variable frequency signal of an oscillator, which is measured by the measuring unit, is corrected, processed and calculated, and then the data of the signal is transmitted to a digital to analog converter, and is converted into an analog electric signal; an analog electric signal controlling unit composed of O1, Q1 controls an output electric current. The utility model has the advantages of compact structure and simple circuit, and can be embedded in the narrow space of the sulfur hexafluoride density controller. The movement of a magnetic stripe, which is in a coil, is non-contact movement, thereby, the problems that the indicating value of the pointer of the sulfur hexafluoride density controller is deviated, vibrated, etc. are avoided.
Description
Technical field
The utility model relates to a kind of sulfur hexafluoride density controller that has the teletransmission function, belongs to a kind of High-Voltage Electrical Appliances monitoring equipment.
Background technology:
Sulfur hexafluoride gas is used in the electric system already as safest High-Voltage Insulation medium, to the density of sulfur hexafluoride gas monitoring tool---the sulfur hexafluoride density controller also just becomes requisite monitoring equipment.Existing sulfur hexafluoride density controller is divided into two kinds substantially: mechanical type density controller and electronic type.The electronic type density controller is not had an optimistic view of by power department at present owing to the interference free performance difference.Mechanical type sulfur hexafluoride density controller is a kind of tensimeter that temperature compensation is arranged, and it is made up of spring body, bourdon tube, temperature compensation structure, movement, pointer and watchcase.When temperature is 20 ℃, pointer shows the pressure of measured air chamber.When the temperature of measured air chamber changed, bourdon tube deformed the drive pointer is rotated, and temperature compensation structure has been arranged, it will be with variation of temperature, drive pointer and rotate in the opposite direction, these two displacements are cancelled out each other, the position when making pointer still point to 20 ℃.The pressure of measured air chamber is relevant when making pointer only with 20 ℃ like this, and temperature independent, thus the variable density of reflection sulfur hexafluoride gas.But the mechanical type density controller does not have measuring-signal teletransmission function.Can not long-rangely read the density value of sulfur hexafluoride density controller.
Summary of the invention
The technical matters that solves
For fear of the deficiencies in the prior art part, the utility model provides a kind of sulfur hexafluoride density controller that has the teletransmission function.The indicated value of density controller is passed to observing and controlling chamber, a distant place in the mode of electric current, allow to the long-range density value that reads the sulfur hexafluoride density controller, finish the long-haul telemetry function.
Technical scheme
The utility model is based on mechanical sulfur hexafluoride density controller and has finished the tonometric temperature compensation of sulfur hexafluoride gas, the angular displacement of reflection density value is obtained the electric signal of density value as measurement target.Technical characterictic is: the oscillator unit that has the angle displacement measurement device connects the oscillation frequency measuring unit, the change frequency signal of the oscillator that measuring unit measures is after the treatment for correcting of signal processor is calculated, data are given count/touch converter and convert analog electrical signal to, the analog electrical signal control module control output current of forming by O1 and Q1.
Described angle displacement measurement device is: on the dish of the movement 1 of sulfur hexafluoride density controller, fix a coil 3, and welding drive link 5 on the axle of movement sector, the other end of drive link 5 is sensing magnetic stripe 2 fixedly.
When the density of tested gas changes, cause that the sector of the movement 1 of sulfur hexafluoride density controller produces angular displacement.When this movement 1 sector motion, drive link 5 drives sensing magnetic stripe 2 and moves in coil 3, make the inductance value of coil 3 change, thereby the concussion frequency that causes oscillator changes.Make measurement to sulfur hexafluoride density become measurement to the concussion frequency of oscillator.Measure the concussion frequency by the frequency measurement chip again, give processor again, after calculating through the treatment for correcting of processor, data are given count/touch converter and convert analog electrical signal to, by 01 and the analog electrical signal control output current formed of Q1, to reach the purpose of measurement data teletransmission.
Beneficial effect
The beneficial effects of the utility model are, have compact conformation, and circuit is simple.Can be embedded in the very little space, sulfur hexafluoride density controller inside.Therefore magnetic stripe motion in coil is non-contact movement, can not produce the problems such as deviation of reading, shake of sulfur hexafluoride density controller pointer.
Description of drawings
Fig. 1: theory diagram
Fig. 2: embodiment electrical schematic diagram
Fig. 3: embodiment angle displacement measurement device schematic diagram
1-movement 2-sensing magnetic stripe 3-coil 4-circuit board 5-drive link
Embodiment
Now in conjunction with the accompanying drawings the utility model is further described:
On the dish of the movement 1 of sulfur hexafluoride density controller, fix a coil 3, welding drive link 5 on the axle of movement sector, the other end of drive link 5 is sensing magnetic stripe 2 fixedly.Said structure is formed the angle displacement measurement device, and wherein coil 3 is as the oscillator coil of oscillator unit.
Oscillator unit:
The oscillation frequency measuring unit:
Signal processor:
The oscillation frequency measuring unit: this unit is made up of the chip with timer counter function.
Signal processor: finish by ultra low-power microcontroller.It is the acp chip of the data-switching and the adjustment of data.Signal processor carries out analyzing and processing calculating with frequency data of measuring and the linear fit data that pre-deposit, thereby obtains density value.
Count/touch converter: be the chip that digital quantity is converted to analog quantity.At this, it gives the electric signal control module with the density value that the density value of digital quantity converts analog quantity to.
Electric signal control module: the controlled constant-current source circuit of forming by operational amplifier and triode.It is controlled by circuital current the density value of analog quantity.
The technical indicator that reaches:
● range :-0.1MPa-0.9MPa; Transmitter output 4～20mA;
● the density controller accuracy class: 20 ℃, 1.5 grades;-25 ℃～60 ℃, 2.5 grades;
● transmitter output accuracy grade: density when 0.3～0.7MPa 1.5 grades, all the other 2.5 grades;
● working environment: A, temperature :-45 ℃～60 ℃ (the lower limit serviceability temperatures that different rated pressure values are corresponding different);
● power supply: 18-30VDC (pushing away remonstrates with uses 24VDC);
● pull-up resistor :≤500 ohm;
● insulating property: connection terminal should be greater than 200M Ω to the insulation resistance of housing;
● ambient humidity: 0～90%RH;
● stability: 0.2%-0.5%FS/.
Claims (2)
1. sulfur hexafluoride density controller that has the teletransmission function, it is characterized in that: the oscillator unit that has the angle displacement measurement device connects the oscillation frequency measuring unit, after the treatment for correcting of the treated device of change frequency signal of the oscillator that measuring unit measures is calculated, data are given count/touch converter and convert analog electrical signal to, the analog electrical signal control module control output current of forming by O1 and Q1.
2. the sulfur hexafluoride density controller that has the teletransmission function according to claim 1, it is characterized in that: described angle displacement measurement device is: fix a coil (3) on the dish of the movement (1) of sulfur hexafluoride density controller, weld drive link (5) on the axle of movement sector, the other end of drive link (5) is sensing magnetic stripe (2) fixedly.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078347 CN2828888Y (en) | 2005-02-06 | 2005-02-06 | Sulfur hexafluoride density controller with telemetering function |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520078347 CN2828888Y (en) | 2005-02-06 | 2005-02-06 | Sulfur hexafluoride density controller with telemetering function |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2828888Y true CN2828888Y (en) | 2006-10-18 |
Family
ID=37080439
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520078347 Expired - Lifetime CN2828888Y (en) | 2005-02-06 | 2005-02-06 | Sulfur hexafluoride density controller with telemetering function |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2828888Y (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564896A (en) * | 2010-12-10 | 2012-07-11 | 特拉法格股份公司 | Density monitor |
-
2005
- 2005-02-06 CN CN 200520078347 patent/CN2828888Y/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102564896A (en) * | 2010-12-10 | 2012-07-11 | 特拉法格股份公司 | Density monitor |
| CN102564896B (en) * | 2010-12-10 | 2015-12-09 | 特拉法格股份公司 | Density monitor |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CX01 | Expiry of patent term |
Expiration termination date: 20150206 Granted publication date: 20061018 |
|
| DD01 | Delivery of document by public notice |
Addressee: Zhang Dongbo Document name: Notification of Expiration of Patent Right Duration |