CN206772487U - Teletransmission pressure transmitter with scene temperature compensation - Google Patents
Teletransmission pressure transmitter with scene temperature compensation Download PDFInfo
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- CN206772487U CN206772487U CN201720326117.8U CN201720326117U CN206772487U CN 206772487 U CN206772487 U CN 206772487U CN 201720326117 U CN201720326117 U CN 201720326117U CN 206772487 U CN206772487 U CN 206772487U
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- pressure transmitter
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Abstract
The utility model belongs to pressure transmitter pressure measurement technology field, more particularly to a kind of teletransmission pressure transmitter with scene temperature compensation, aim to solve the problem that teletransmission pressure transmitter scene temperature compensation problem, including pressure transmitter body and pressure-detecting device, pressure-detecting device installation is at the scene in measured medium, pressure transmitter body is installed in the security context away from scene, and temperature collecting device is also equipped with live measured medium；Pressure-detecting device is connected by the sensor element teletransmission of capillary and transmitter body, and temperature collecting device resolves part teletransmission by the electrical equipment of wire and transmitter body and connected.While collection site pressure, temperature measuring equipment gathers and uploaded the electric signal for representing field medium temperature, teletransmission pressure transmitter is carried out real-time temperature compensation according to site temperature, ensure that the precision of pressure measxurement.
Description
Technical field
The utility model belongs to pressure transmitter pressure measurement technology field, and in particular to a kind of that detection scene temperature is adopted
The teletransmission pressure transmitter with scene temperature compensation of collection.
Background technology
The method that teletransmission pressure transmitter currently on the market uses capillary impulse, the pressure of measured medium is passed through
Capillary pressure guiding pipe is sent to the pressure transmitter body away from measurement medium, and then pressure transmitter is to pressure of field medium etc.
Parameter carries out resolving and send aobvious, such as the pressure transmitter described in patent 200920100835.9, is exactly by bellows and capillary
Pipe realizes the collection to site pressure.The great advantage of this method is simple in construction, it is only necessary to which a capillary connects, it is possible to
Measure the pressure value of complicated field medium.But this method does not have scene temperature to gather link, is had in measurement process larger
Error.Because capillary can only collect the pressure of field medium, and scene temperature can not be perceived, sensor body is being carried out
Scene temperature exact value is just lacked during resolving, the pressure so resolved just has certain error.
For the pressure measurement errors reduced or offset pressure transmitter is brought by temperature change, collect inside pressure transmitter
Into temperature compensation function, but such pressure transmitter is only installed in field medium and can be only achieved temperature compensation function, and
There is electronic component in pressure transmitter, it there are certain requirements to operating ambient temperature, cause such pressure transmitter to be not suitable for
It is directly mounted in the particular surroundings such as high temperature.Therefore, for the complicated site environment such as high temperature, using the pressure transmitter with teletransmission
To carry out pressure detecting.Now, although pressure transmitter body part has temperature compensation function, its reference temperature can only be
The use environment temperature of pressure transmitter, and sometimes environment temperature and scene temperature difference are larger, at this time calculate
Pressure value just has larger error.
The content of the invention
The utility model provides a kind of teletransmission pressure transmitter with scene temperature compensation, it is intended to solves the change of teletransmission pressure
Device scene temperature compensation problem is sent, ensures measurement accuracy of the teletransmission pressure transmitter under any measurement temperature.
The utility model adopts the following technical scheme that：
A kind of teletransmission pressure transmitter with scene temperature compensation, including pressure transmitter body and pressure-detecting device,
The pressure transmitter body is connected with pressure-detecting device teletransmission, and pressure-detecting device installation in measured medium, is pressed at the scene
Power transmitter body is installed in the security context away from scene, and temperature collecting device is also equipped with live measured medium；Institute
The electronics for stating pressure transmitter body including integrated form resolves part and sensor element, pressure-detecting device by capillary with
The sensor element teletransmission connection of transmitter body, temperature collecting device resolve part by the electrical equipment of wire and transmitter body
Teletransmission connects, and it is the representative temperature signal that temperature collecting device output was powered and received to temperature collecting device that electrical equipment, which resolves part,
Electric signal.
The pressure-detecting device is isolation bellows, provided with one group or two groups（It is respectively used to pressure detecting and differential pressure inspection
Survey）, isolate bellows and temperature collecting device be installed in live measured medium by flange.
The suggestion ultimate range of the teletransmission is 50 meters.
Described temperature collecting device is RTD equitemperature Sensitive Apparatus.
Pressure transmitter described in the utility model contains temperature signal resolving circuit, can accurate reproduction field medium temperature
Angle value.Transmitter hardware includes resolver, isolation bellows detection means, live temperature measuring equipment and transmitter annex（Such as hair
Tubule, wire etc.）.Wherein, temperature element is fixed on the flange of pressure measurement bellows one end, coherent detection position at the scene is installed
Put；Pressure transmitter body two parts are connected by capillary with annexes such as wires, are formed with the remote of scene temperature detection teletransmission
Biography type pressure transmitter, while collection site pressure, temperature measuring equipment, which is gathered and uploaded, represents field medium temperature
Electric signal, to electric signal decode, just can obtain site temperature, teletransmission pressure transmitter is carried out according to site temperature
Real-time temperature compensation, it ensure that the precision of pressure measxurement.
Compared with existing pressure transmitter, the utility model has the advantages that：
1st, the utility model increases sensor for measuring temperature on the impulse end of teletransmission impulse capillary, the temperature sensor
Scene temperature is converted into can teletransmission, the electric signal that is not limited by distance.The electric signal is sent to by pick-up by wire
Device body, then carry out temperature reduction.Using the technology, the temperature of live measured medium can be accurately detected, and then is carried out accurate
Really effective pressure temperature compensation, compared to traditional teletransmission pressure transmitter（Compensate environment temperature, i.e., can only be according to residing for transmitter body
Environment temperature carry out pressure temperature compensation）, the measurement accuracy of live measured medium pressure can be greatly improved.
2nd, teletransmission temperature-compensating can be achieved in the temperature measuring equipment that the utility model only needs increase to be connected with transmitter body,
Need not change pressure transmitter body construction, it is of the present utility model it is simple in construction, cost is low.
Brief description of the drawings
Fig. 1 is structural representation of the present utility model；
In figure：1- electronics resolves part, 2- wires, 3- temperature collecting devices, 4- pressure-detecting devices, 5- capillaries, 6-
Sensor element, 7- connectors.
Embodiment
The utility model in order to make up due to lack accurate field medium temperature value and caused by pressure measurement error, realize pair
The temperature compensation function of the measurement accuracy of teletransmission pressure transmitter, it is proposed that a kind of by the accurate collection site of teletransmission pressure transmitter
The measurement apparatus of measured medium temperature.
Teletransmission pressure transmitter with scene temperature compensation as shown in Figure 1, including pressure transmitter body and pressure inspection
Device is surveyed, the pressure transmitter body is connected with pressure-detecting device teletransmission, and pressure-detecting device installation is tested at the scene to be situated between
In matter, pressure transmitter body is installed in the security context away from scene, and temperature acquisition is also equipped with live measured medium
Device；The pressure transmitter body includes the electronics resolving part of integrated form and sensor element, pressure-detecting device pass through
The sensor element teletransmission connection of capillary and transmitter body, temperature collecting device pass through wire and the electrical equipment of transmitter body
Part teletransmission connection is resolved, it is the representative temperature that temperature collecting device output was powered and received to temperature collecting device that electronics, which resolves part,
Spend the electric signal of signal.
The distance of the teletransmission determines that ultimate range is usually no more than 50 according to the pressure transmission ability of pressure transmission device
Rice, i.e. the distance between pressure transmitter body and Site Detection part.
Described temperature collecting device can carry out measure field temperature using ripe temperature sensor of in the market etc., such as
RTD equitemperature Sensitive Apparatus.
Wherein, it be routine techniques that the sensor element of pressure transmitter body and electronics, which resolve part, can using it is existing into
Cooking technique.
During onsite application, the capillary pressure guiding pipe measurement end with temperature-detecting device is arranged on tested be situated between by flange etc.
Matter side, transmitter body are mounted remotely from the place of safety of tested device.When remote transmitter works on power, transmitter sheet
The resolver of body provides the current signal of standard to temperature-detecting device, and temperature-detecting device is started working, and will be live warm
Degree is converted into directly proportional voltage signal, passes back to transmitter body, the electric signal is reduced into temperature signal by transmitter（Platinum electricity
The change in resistance and temperature proportion relation of resistance）, participate in the temperature-compensating of pressure.Due to can accurately obtain field medium
Temperature value, so as to ensure that the measurement accuracy of pressure.
Claims (4)
1. a kind of teletransmission pressure transmitter with scene temperature compensation, including pressure transmitter body and pressure-detecting device（4）,
It is characterized in that：The pressure transmitter body and pressure-detecting device（4）Teletransmission connects, pressure-detecting device（4）It is arranged on
In live measured medium, pressure transmitter body is installed in the security context away from scene, is also installed in live measured medium
There is temperature collecting device（3）；The electronics that the pressure transmitter body includes integrated form resolves part（1）And sensor element
（6）, pressure-detecting device（4）Pass through capillary（5）With the sensor element of transmitter body（6）Teletransmission connects, temperature acquisition
Device（3）Pass through wire（2）Part is resolved with the electrical equipment of transmitter body（1）Teletransmission connects, and electrical equipment resolves part（1）For temperature
Harvester（3）Power and receive temperature collecting device（3）The electric signal of the representative temperature signal of output.
2. the teletransmission pressure transmitter according to claim 1 with scene temperature compensation, it is characterised in that：The pressure inspection
Survey device（4）For isolation bellows, provided with one group or two groups, isolate bellows and temperature collecting device（3）It is installed on by flange
In live measured medium.
3. the teletransmission pressure transmitter according to claim 2 with scene temperature compensation, it is characterised in that：The teletransmission
Ultimate range is 50 meters.
4. the teletransmission pressure transmitter according to claim 3 with scene temperature compensation, it is characterised in that：Described temperature
Harvester（3）For RTD.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720326117.8U CN206772487U (en) | 2017-03-30 | 2017-03-30 | Teletransmission pressure transmitter with scene temperature compensation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201720326117.8U CN206772487U (en) | 2017-03-30 | 2017-03-30 | Teletransmission pressure transmitter with scene temperature compensation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN206772487U true CN206772487U (en) | 2017-12-19 |
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ID=60630828
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201720326117.8U Active CN206772487U (en) | 2017-03-30 | 2017-03-30 | Teletransmission pressure transmitter with scene temperature compensation |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987451A (en) * | 2019-11-22 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | External-guiding temperature and pressure measuring method for internal sealing device of aircraft engine |
-
2017
- 2017-03-30 CN CN201720326117.8U patent/CN206772487U/en active Active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110987451A (en) * | 2019-11-22 | 2020-04-10 | 中国航发沈阳黎明航空发动机有限责任公司 | External-guiding temperature and pressure measuring method for internal sealing device of aircraft engine |
| CN110987451B (en) * | 2019-11-22 | 2021-10-15 | 中国航发沈阳黎明航空发动机有限责任公司 | External-guiding temperature and pressure measuring method for internal sealing device of aircraft engine |
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