CN203406850U - Telemetering adaptor in high isolation - Google Patents
Telemetering adaptor in high isolation Download PDFInfo
- Publication number
- CN203406850U CN203406850U CN201320437280.3U CN201320437280U CN203406850U CN 203406850 U CN203406850 U CN 203406850U CN 201320437280 U CN201320437280 U CN 201320437280U CN 203406850 U CN203406850 U CN 203406850U
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- Prior art keywords
- circuit
- power supply
- secondary power
- isolating
- isolation
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Abstract
The utility model relates to a telemetering adaptor in high isolation, comprising a secondary power supply circuit, an optoelectronic isolation circuit, an isolating amplifier circuit, signal input ends and signal output ends. The signal input ends are respectively connected with the signal output ends through the optoelectronic isolation circuit and the isolating amplifier circuit. An input end of the secondary power supply circuit is connected with the signal output end, and output ends of the secondary power supply circuit are respectively connected with the optoelectronic isolation circuit and the isolating amplifier circuit. Since the isolation circuit formed by the optoelectronic isolation circuit and the isolating amplifier circuit is used, input and output signals are effectively isolated, isolation is improved, and use is simple and convenient, and the telemetering adaptor has relatively high practical value.
Description
[technical field]
The utility model relates to a kind of remote measurement adapter, particularly a kind of remote measurement adapter of high-isolation.
[background technology]
Remote measurement is undertaken by telemetry system.Telemetry system is comprised of three parts: (1) input equipment, comprises transducer and converter.Transducer becomes measured parameter into the signal of telecommunication, and converter becomes to be suitable for the signal of multiple transmission apparatus input requirement converting electrical signal.(2) transmission equipment is a kind of multiple communicating apparatus.It can be wire communication or radio communication, both can transmission of analogue signal also can transmission of digital signals.Object is that the signal of equipment input is passed to terminal without distortion.(3) terminal equipment, its function is to receive signal, and signal is carried out to record, shows and processes, to obtain measurement result.
At present, for the signal isolation in telemetry, be generally to adopt the formation remote measurement adapters such as resistance, operational amplifier to realize isolation, this remote measurement adapter isolation consisting of resistance, operational amplifier is low, bad to input and output isolation effect, affects the service behaviour of product.
[utility model content]
In order to overcome prior art deficiency, the purpose of this utility model is to provide a kind of remote measurement adapter of high-isolation.
The technical solution adopted in the utility model is: a kind of remote measurement adapter of high-isolation, it comprises secondary power supply circuit, photoelectric isolating circuit, isolating amplifier circuit, signal input part and signal output part, this signal input part is respectively by being connected with described signal output part after described photoelectric isolating circuit, described isolating amplifier circuit, the input of described secondary power supply circuit is connected with described signal output part, and the output of this secondary power supply circuit is connected with described photoelectric isolating circuit, described isolating amplifier circuit respectively.
Further, described secondary power supply circuit comprises input filter capacitor, DC-DC power module, output filter capacitor, the compensating network being connected successively.
Further, the model of described DC-DC power module is TPS5430DDA.
Further, between described photoelectric isolating circuit and described signal input part, be also connected with a current-limiting resistance.
Further, between described signal input part and described isolating amplifier circuit, be also connected with the first impedance matching unit, between this isolating amplifier circuit and described signal output part, be also connected with an operational amplifier, between described photoelectric isolating circuit and described signal output part, be connected with the second impedance matching unit, described the first impedance matching unit is also connected with the output of secondary power supply circuit with the second impedance matching unit.
With respect to remote measurement adapter of the prior art, the beneficial effects of the utility model are: the buffer circuit that adopts photoelectric isolating circuit and isolating amplifier circuit to form, effectively input and output signal is isolated, and improved isolation, and easy to use, there is higher practical value.
[accompanying drawing explanation]
Fig. 1. be the frame diagram of the remote measurement adapter of high-isolation of the present utility model;
Fig. 2. be the frame diagram of secondary power supply circuit of the remote measurement adapter of high-isolation of the present utility model.
Description of reference numerals: 1, signal input part, 2, current-limiting resistance, 3, photoelectric isolating circuit, 4, the second impedance matching unit, 5, secondary power supply circuit, the 6, first impedance matching unit, 7, isolating amplifier circuit, 8, operational amplifier, 9, signal output part, 51, input filter capacitor, 52, DC-DC power module, 53, output filter capacitor, 54, compensating network.
[embodiment]
Below in conjunction with drawings and embodiments, the utility model is described in further detail.
Consult shown in Fig. 1, the utility model provides a kind of remote measurement adapter of high-isolation, it comprises secondary power supply circuit 5, photoelectric isolating circuit 3, isolating amplifier circuit 7, signal input part 1 and signal output part 9, this signal input part 1 is respectively by being connected with signal output part 9 after photoelectric isolating circuit 3, isolating amplifier circuit 7, and the input of secondary power supply circuit 5 is connected with signal output part 9.The output of this secondary power supply circuit 5 is connected with photoelectric isolating circuit 3, isolating amplifier circuit 7 respectively.In the present embodiment, the input of secondary power supply circuit 5 is by provide+27 voltages of signal output part 9, and the output of secondary power supply circuit 5 provides 15V voltage to photoelectric isolating circuit 3 and isolating amplifier circuit 7.
Concrete, between photoelectric isolating circuit 3 and signal input part 1, be also in series with a current-limiting resistance 2.Between signal input part 1 and isolating amplifier circuit 7, be also connected with the first impedance matching unit 6, be also connected with an operational amplifier 8 between this isolating amplifier circuit 7 and signal output part 9, the model of this operational amplifier 8 is FX124 preferably.Between photoelectric isolating circuit 3 and signal output part 9, be connected with the second impedance matching unit 4, the first impedance matching unit 6 is also connected with the output of secondary power supply circuit 5 with the second impedance matching unit 4, and the supply voltage of 15V is provided by the output of secondary power supply circuit 5.In the present embodiment, the optocoupler model that photoelectric isolating circuit 3 adopts is TLP281, and the model of the isolated amplifier in isolating amplifier circuit 7 is AD202.
Consult shown in Fig. 2, this secondary power supply circuit 5 comprises input filter capacitor 51, DC-DC power module 52, output filter capacitor 53, the compensating network 54 being connected successively.Wherein the model of DC-DC power module 52 is TPS5430DDA, have wide input voltage range (5.5V～36V), power output is large, efficiency is high, output ripple is little feature, and output voltage values can select different debugging resistance to determine.
Foregoing detailed description is only exemplary description, and those skilled in the art in the situation that do not depart from the scope and spirit that the utility model is protected, can design various execution modes according to different actual needs.
Claims (5)
1. the remote measurement adapter of a high-isolation, it is characterized in that: comprise secondary power supply circuit (5), photoelectric isolating circuit (3), isolating amplifier circuit (7), signal input part (1) and signal output part (9), this signal input part (1) is respectively by described photoelectric isolating circuit (3), after described isolating amplifier circuit (7), be connected with described signal output part (9), the input of described secondary power supply circuit (5) is connected with described signal output part (9), and the output of this secondary power supply circuit (5) respectively with described photoelectric isolating circuit (3), described isolating amplifier circuit (7) is connected.
2. the remote measurement adapter of high-isolation according to claim 1, is characterized in that: described secondary power supply circuit (5) comprises input filter capacitor (51), DC-DC power module (52), output filter capacitor (53), the compensating network (54) being connected successively.
3. the remote measurement adapter of high-isolation according to claim 2, is characterized in that: the model of described DC-DC power module (52) is TPS5430DDA.
4. the remote measurement adapter of high-isolation according to claim 1, is characterized in that: between described photoelectric isolating circuit (3) and described signal input part (1), be also connected with a current-limiting resistance (2).
5. the remote measurement adapter of high-isolation according to claim 1, it is characterized in that: between described signal input part (1) and described isolating amplifier circuit (7), be also connected with the first impedance matching unit (6), between this isolating amplifier circuit (7) and described signal output part (9), be also connected with an operational amplifier (8), between described photoelectric isolating circuit (3) and described signal output part (9), be connected with the second impedance matching unit (4), described the first impedance matching unit (6) is also connected with the output of secondary power supply circuit (5) with the second impedance matching unit (4).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437280.3U CN203406850U (en) | 2013-07-22 | 2013-07-22 | Telemetering adaptor in high isolation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201320437280.3U CN203406850U (en) | 2013-07-22 | 2013-07-22 | Telemetering adaptor in high isolation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203406850U true CN203406850U (en) | 2014-01-22 |
Family
ID=49942769
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201320437280.3U Expired - Lifetime CN203406850U (en) | 2013-07-22 | 2013-07-22 | Telemetering adaptor in high isolation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN203406850U (en) |
-
2013
- 2013-07-22 CN CN201320437280.3U patent/CN203406850U/en not_active Expired - Lifetime
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| CX01 | Expiry of patent term |
Granted publication date: 20140122 |
|
| CX01 | Expiry of patent term |