CN203037713U - Multiple-signal collection device used for fire hazard detector - Google Patents
Multiple-signal collection device used for fire hazard detector Download PDFInfo
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- CN203037713U CN203037713U CN 201220632339 CN201220632339U CN203037713U CN 203037713 U CN203037713 U CN 203037713U CN 201220632339 CN201220632339 CN 201220632339 CN 201220632339 U CN201220632339 U CN 201220632339U CN 203037713 U CN203037713 U CN 203037713U
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Abstract
The utility model relates to a multiple-signal collection device used for a fire hazard detector. The multiple-signal collection device comprises a sensor, a sampling resistor circuit, a voltage clamping protection circuit, a filter circuit and a main chip that are connected in order. Compared with the prior art, the multiple-signal collection device used for the fire hazard detector has the advantages of flexible function changes, low application cost, convenient wiring, optimized lines, etc.
Description
Technical field
The utility model relates to a kind of signal pickup assembly, especially relates to a kind of multiple signal pickup assembly for fire monitoring detector.
Background technology
At present, the function ratio of most of fire monitoring detector is more single on the market, as special measurement residual current, measure temperature or the monitoring of special distribution specially, in more nervous today of the energy day, electricity consumption also will be calculated carefully and budget strictly, and is necessary the accurate measurement electric energy like this, and quantification treatment is carried out in electricity consumption, at above-mentioned situation, existing a kind of by distribution monitoring, fire hazard monitoring, the three-in-one comprehensive detector of electric energy metrical on the market.
Simultaneously, realize the detector of above-mentioned functions, just need gather signals such as voltage, electric current, residual current, temperature, so just need multiple different Acquisition Circuit to be integrated on the circuit board, like this because the difference of each Acquisition Circuit, cause the kind of needs buying components and parts more heterogeneous, the cabling layout on the circuit board is also cumbersome, has also increased cost for simultaneously enterprise.Because each Acquisition Circuit has purposes separately, so just make the function of each Acquisition Circuit correspondence fix again, the functional characteristics conversion is dumb.
The utility model content
The purpose of this utility model be exactly provide in order to overcome the defective that above-mentioned prior art exists a kind of functional mapping flexibly, realize that cost is low, layout convenient and optimize the multiple signal pickup assembly that is used for fire monitoring detector of cabling.
The purpose of this utility model can be achieved through the following technical solutions:
A kind of multiple signal pickup assembly for fire monitoring detector is characterized in that, comprises the sensor, sample resistance circuit, voltage clamping protective circuit, filtering circuit and the master chip that connect successively.
Described sensor comprises voltage transformer (VT), current transformer, residual current transformer and temperature sensor.
Described sample resistance circuit comprises sample resistance R1, capacitor C 1, capacitor C 2 and reference voltage V REF; described sample resistance R1 is connected in parallel on the sensor two ends; described capacitor C 1 one ends are connected with the input end of sample resistance R1 one end, voltage clamping protective circuit respectively; the described sample resistance R1 other end is connected with capacitor C 2 one ends, reference voltage V REF respectively, described capacitor C 1 other end and the equal ground connection of capacitor C 2 other ends.
If temperature sensor is the thermosensitive type temperature sensor, described sample resistance circuit comprises sample resistance R and reference voltage V REF, and described thermosensitive type temperature sensor one end is by sample resistance R ground connection, and the other end is connected with reference voltage V REF.
Described voltage clamping protective circuit is the duodiode device Q1 that is made up of first diode of reverse parallel connection and second diode; wherein the positive pole of the negative pole of first diode and second diode all is connected between the input end of the output terminal of sample resistance circuit and filtering circuit; the plus earth of described first diode, the negative pole of described second diode meets reference power source 3.3V.
Described filtering circuit comprises resistance R 2 and capacitor C 3, and described resistance R 2 one ends are connected with the output terminal of voltage clamping protective circuit, and the other end is connected with capacitor C 3 one ends, master chip respectively, described capacitor C 3 other end ground connection.
Compared with prior art, the utlity model has following advantage:
1, this device is used for the circuit board of detector inside, can realize the signals collecting to three-phase voltage, three-phase current, residual current and temperature; Also the signal acquisition circuit of three-phase voltage or three-phase current can be converted to the signal acquisition circuit of residual current or temperature, realize multiloop fire hazard monitoring, functional mapping is flexible;
2, this device components and parts are resistance, electric capacity and diode, and can adopt paster encapsulation, these device low prices, market purchasing is also more convenient, because a plurality of Acquisition Circuit are all identical, so circuit board also has layout more convenient, optimize the advantage of cabling simultaneously.
Description of drawings
Fig. 1 is universal circuit figure of the present utility model;
Fig. 2 is the circuit diagram of thermosensitive type temperature sensor for sensor of the present utility model.
Embodiment
Below in conjunction with the drawings and specific embodiments the utility model is elaborated.
Embodiment
The utility model is applicable to three-phase voltage, three-phase current, residual current and selection of temperature signal, because these signals can be used with a kind of Acquisition Circuit, so being voltage acquisition, main difference leans on voltage transformer (VT), what current acquisition leaned on is current transformer, what the residual current collection was leaned on is residual current transformer, and what temperature signal collection leaned on is temperature sensor.
As shown in Figure 1, the utility model comprises sensor, sample resistance circuit 10, voltage clamping protective circuit 20, filtering circuit 30 and the master chip that connects successively.Described sensor comprises voltage transformer (VT), current transformer, residual current transformer and temperature sensor.
Described sample resistance circuit comprises sample resistance R1, capacitor C 1, capacitor C 2 and reference voltage V REF; described sample resistance R1 is connected in parallel on the sensor two ends; described capacitor C 1 one ends are connected with the input end of sample resistance R1 one end, voltage clamping protective circuit respectively; the described sample resistance R1 other end is connected with capacitor C 2 one ends, reference voltage V REF respectively, described capacitor C 1 other end and the equal ground connection of capacitor C 1 other end.
As shown in Figure 2, if temperature sensor is the thermosensitive type temperature sensor, described sample resistance circuit comprises sample resistance R and reference voltage V REF, and described thermosensitive type temperature sensor one end is by sample resistance R ground connection, and the other end is connected with reference voltage V REF.
Described voltage clamping protective circuit is the duodiode device Q1 that is made up of first diode of reverse parallel connection and second diode; wherein the positive pole of the negative pole of first diode and second diode all is connected between the input end of the output terminal of sample resistance circuit and filtering circuit; the plus earth of described first diode, the negative pole of described second diode meets reference power source 3.3V.
Described filtering circuit comprises resistance R 2 and capacitor C 3, and described resistance R 2 one ends are connected with the output terminal of voltage clamping protective circuit, and the other end is connected with capacitor C 3 one ends, master chip respectively, described capacitor C 3 other end ground connection.
Principle of work of the present utility model is as follows:
The analog current signal that mutual inductor collects obtain the potential voltage at A place through sample resistance R1, and capacitor C 1 and C2 plays the effect of filtering.
Electronic devices and components Q1 inside is made up of 2 diodes, and diode has the characteristic of unidirectional conducting, 3 pin and the 2 pin conductings of Q1 when the voltage that obtains in the sample circuit 10 surpasses 3.3V, this moment, the 3 pin voltages of components and parts Q1 were 3.3V, when the voltage that obtains in the sample circuit 10 is lower than 0V, 3 pin of Q1 and 1 pin conducting, this moment, the 3 pin voltages of components and parts Q1 were 0V.
Voltage, current acquisition circuit theory are the same with the residual current Acquisition Circuit, all be to collect an analog current by the mutual inductance mutual inductor, and at the thermosensitive resistance type temperature sensor, because what collect is not electric parameter, but resistance value, like this as long as resistance R 1 and capacitor C 2 are not adorned, it is just passable that the electric capacity at C1 place changes resistance into, the same like this voltage (as Fig. 2) that can obtain the A place.
Claims (6)
1. a multiple signal pickup assembly that is used for fire detector is characterized in that, comprises the sensor, sample resistance circuit, voltage clamping protective circuit, filtering circuit and the master chip that connect successively.
2. a kind of multiple signal pickup assembly for fire monitoring detector according to claim 1 is characterized in that described sensor comprises voltage transformer (VT), current transformer, residual current transformer and temperature sensor.
3. a kind of multiple signal pickup assembly for fire detector according to claim 1; it is characterized in that; described sample resistance circuit comprises sample resistance R1, capacitor C 1, capacitor C 2 and reference voltage V REF; described sample resistance R1 is connected in parallel on the sensor two ends; described capacitor C 1 one ends are connected with the input end of sample resistance R1 one end, voltage clamping protective circuit respectively; the described sample resistance R1 other end is connected with capacitor C 2 one ends, reference voltage V REF respectively, described capacitor C 1 other end and the equal ground connection of capacitor C 2 other ends.
4. a kind of multiple signal pickup assembly for fire detector according to claim 2 is put, it is characterized in that, if temperature sensor is the thermosensitive type temperature sensor, described sample resistance circuit comprises sample resistance R and reference voltage V REF, described thermosensitive type temperature sensor one end is by sample resistance R ground connection, and the other end is connected with reference voltage V REF.
5. a kind of multiple signal pickup assembly for fire detector according to claim 1; it is characterized in that; described voltage clamping protective circuit is the duodiode device Q1 that is made up of first diode of reverse parallel connection and second diode; wherein the positive pole of the negative pole of first diode and second diode all is connected between the input end of the output terminal of sample resistance circuit and filtering circuit; the plus earth of described first diode, the negative pole of described second diode meets reference power source 3.3V.
6. a kind of multiple signal pickup assembly for fire detector according to claim 1; it is characterized in that; described filtering circuit comprises resistance R 2 and capacitor C 3; described resistance R 2 one ends are connected with the output terminal of voltage clamping protective circuit; the other end is connected with capacitor C 3 one ends, master chip respectively, described capacitor C 3 other end ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220632339 CN203037713U (en) | 2012-11-26 | 2012-11-26 | Multiple-signal collection device used for fire hazard detector |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 201220632339 CN203037713U (en) | 2012-11-26 | 2012-11-26 | Multiple-signal collection device used for fire hazard detector |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN203037713U true CN203037713U (en) | 2013-07-03 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 201220632339 Expired - Lifetime CN203037713U (en) | 2012-11-26 | 2012-11-26 | Multiple-signal collection device used for fire hazard detector |
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| Country | Link |
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| CN (1) | CN203037713U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291226A (en) * | 2016-07-27 | 2017-01-04 | 北大青鸟环宇消防设备股份有限公司 | Residual current transformer failure detector circuit and electrical fire-detector |
-
2012
- 2012-11-26 CN CN 201220632339 patent/CN203037713U/en not_active Expired - Lifetime
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN106291226A (en) * | 2016-07-27 | 2017-01-04 | 北大青鸟环宇消防设备股份有限公司 | Residual current transformer failure detector circuit and electrical fire-detector |
| CN106291226B (en) * | 2016-07-27 | 2019-08-06 | 北大青鸟环宇消防设备股份有限公司 | Residual current transformer fault detection circuit and electrical fire-detector |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C56 | Change in the name or address of the patentee | ||
| CP01 | Change in the name or title of a patent holder |
Address after: 201801 Jiading District Green Road, No. 253, Shanghai Patentee after: ACREL Co.,Ltd. Patentee after: JIANGSU ACREL ELECTRICAL APPLIANCE MANUFACTURE Co.,Ltd. Address before: 201801 Jiading District Green Road, No. 253, Shanghai Patentee before: Shanghai Acrel Ltd. Patentee before: JIANGSU ACREL ELECTRICAL APPLIANCE MANUFACTURE Co.,Ltd. |
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| CX01 | Expiry of patent term |
Granted publication date: 20130703 |
|
| CX01 | Expiry of patent term |