CN204166038U - A kind of combined sensor - Google Patents
A kind of combined sensor Download PDFInfo
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- CN204166038U CN204166038U CN201420643634.4U CN201420643634U CN204166038U CN 204166038 U CN204166038 U CN 204166038U CN 201420643634 U CN201420643634 U CN 201420643634U CN 204166038 U CN204166038 U CN 204166038U
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Abstract
The utility model discloses a kind of combined sensor, for the detection of transmission line of electricity in photovoltaic inverting system, comprise the first temperature detecting unit, current detecting unit and controller.Wherein, the first temperature detecting unit comprises the first temperature sensor and the first temperature modulate circuit; Current detecting unit comprises current sensor and the first current regulating circuit.First temperature sensor is arranged at current sensor place, for detecting the temperature of current sensor.First temperature modulate circuit is nursed one's health the signal that the first temperature sensor exports.Current sensor passes transmission line of electricity, for detecting the electric current flowing through transmission line of electricity.The signal that first current regulating circuit is used for current sensor exports is nursed one's health.The signal that controller utilizes the first temperature modulate circuit to export carries out temperature adjustmemt to the signal that the first current regulating circuit exports, thus improves current detection accuracy.
Description
Technical field
The utility model relates to photovoltaic system technical field, particularly relates to a kind of combined sensor.
Background technology
Along with the fast development of photovoltaic technology, the application of photovoltaic DC-to-AC converter (Photovoltaic inverter) is also more and more extensive.At present, employing current sensor mostly is to the current detection scheme of the transmission line of electricity (as copper bar and cable) in photovoltaic inverting system.For powerful photovoltaic DC-to-AC converter, the electric current flowing through transmission line of electricity is comparatively large, and the temperature of transmission line of electricity can rise thereupon, and the environment temperature therefore residing for current sensor changes.Because the measuring accuracy of current sensor affects by drift current is isoparametric, such as, variation of ambient temperature can cause the change of drift current, and therefore when the temperature residing for current sensor raises, its accuracy of detection is deteriorated.
Therefore, in varying environment temperature, the accuracy of detection how improving current sensor is those skilled in the art's problem demanding prompt solutions.
Utility model content
The purpose of this utility model is to provide a kind of combined sensor, for improving the current detection accuracy of transmission line of electricity in photovoltaic inverting system.
For solving the problems of the technologies described above, the utility model provides a kind of combined sensor, and for the detection of transmission line of electricity in photovoltaic inverting system, described combined sensor comprises the first temperature detecting unit, current detecting unit and controller;
Described first temperature detecting unit comprises the first temperature sensor and the first temperature modulate circuit; Described first temperature sensor is arranged at described current sensor place, detects the temperature of described current sensor; Described first temperature modulate circuit is connected with described first temperature sensor, nurses one's health the signal that described first temperature sensor exports, and described first temperature modulate circuit is connected with described controller simultaneously;
Described current detecting unit comprises current sensor and the first current regulating circuit; Described current sensor passes described transmission line of electricity, detects the electric current flowing through described transmission line of electricity; Described first current regulating circuit is connected with described current sensor, nurses one's health the signal that described current sensor exports, and described first current regulating circuit is connected with described controller simultaneously;
The signal that described controller utilizes described first temperature modulate circuit to export carries out temperature adjustmemt to the signal that described first current regulating circuit exports.
Preferably, in combinations thereof formula sensor, described first temperature sensor is arranged at the inside of described current sensor.
Preferably, combinations thereof formula sensor also comprises the second temperature detecting unit, and described second temperature detecting unit comprises the second temperature sensor and the second temperature modulate circuit;
Described second temperature sensor is arranged at described transmission line of electricity place, detects the temperature of described transmission line of electricity;
Described second temperature modulate circuit is connected with described second temperature sensor, nurses one's health the signal that described second temperature sensor exports, and described second temperature modulate circuit is connected with described controller simultaneously.
Preferably, in combinations thereof formula sensor, described second temperature sensor is arranged at the surface of described transmission line of electricity.
Preferably, in combinations thereof formula sensor, it is inner that described second temperature sensor is integrated in described transmission line of electricity.
The utility model also provides a kind of combined sensor, for the detection of transmission line of electricity in photovoltaic inverting system, described combined sensor comprises the first temperature sensor, current sensor, current regulating circuit and controller, and wherein, described current sensor has temperature adjustmemt function;
Described first temperature sensor is arranged at described current sensor place, detects the temperature of described current sensor, and described first temperature sensor is connected with the temperature signal input of described current sensor;
Described current sensor passes described transmission line of electricity, detects the electric current flowing through described transmission line of electricity;
Described current regulating circuit is connected with described current sensor, nurses one's health the signal that described current sensor exports, and described current regulating circuit is connected with described controller simultaneously.
Preferably, in combinations thereof formula sensor, described first temperature sensor is arranged at the inside of described current sensor.
Preferably, combinations thereof formula sensor also comprises temperature detecting unit;
Described temperature detecting unit comprises the second temperature sensor and temperature modulate circuit;
Described second temperature sensor is arranged at described transmission line of electricity place, detects the temperature of described transmission line of electricity;
Described temperature modulate circuit is connected with described second temperature sensor, nurse one's health the signal that described second temperature sensor exports, and described temperature modulate circuit is connected with described controller simultaneously.
Preferably, in combinations thereof formula sensor, described second temperature sensor is arranged at the surface of described transmission line of electricity.
Preferably, in combinations thereof formula sensor, it is inner that described second temperature sensor is integrated in described transmission line of electricity.
As can be seen here, the beneficial effects of the utility model are:
Current sensor and temperature sensor is included in combined sensor disclosed in the utility model.Wherein, temperature sensor is arranged at current sensor place, for detecting the temperature of current sensor.Current sensor passes transmission line of electricity, for detecting the electric current flowing through transmission line of electricity.The output signal of the temperature value utilizing temperature sensor to detect to current sensor is revised, thus improves the current detection accuracy of transmission line of electricity in photovoltaic inverting system.
Accompanying drawing explanation
In order to be illustrated more clearly in the utility model embodiment, simple introduction is done below by the accompanying drawing used required in embodiment, apparently, accompanying drawing in the following describes is only embodiments more of the present utility model, for those of ordinary skill in the art, under the prerequisite not paying creative work, other accompanying drawing can also be obtained according to these accompanying drawings.
The structural drawing of a kind of combined sensor that Fig. 1 provides for the utility model;
The structural drawing of the another kind of combined sensor that Fig. 2 provides for the utility model;
The structural drawing of the another kind of combined sensor that Fig. 3 provides for the utility model;
The structural drawing of the another kind of combined sensor that Fig. 4 provides for the utility model.
Embodiment
Below in conjunction with the accompanying drawing in the utility model embodiment, be clearly and completely described the technical scheme in the utility model embodiment, obviously, described embodiment is only the utility model part embodiment, instead of whole embodiment.Based on the embodiment in the utility model, those of ordinary skill in the art are not making under creative work prerequisite, and the every other embodiment obtained, all belongs to the utility model protection domain.
Core of the present utility model is to provide a kind of combined sensor, the basis of existing current sensor adds the parts such as temperature sensor, modulate circuit, controller, for improving the current detection accuracy of transmission line of electricity in photovoltaic inverting system.
In order to make those skilled in the art person understand the utility model scheme better, below in conjunction with the drawings and specific embodiments, the utility model is described in further detail.
Embodiment one
Fig. 1 is the structural drawing of a kind of combined sensor that the utility model provides.Below the structure of the combined sensor shown in Fig. 1 is described.
Combined sensor comprises: the first temperature detecting unit 11, current detecting unit 12 and controller 13.First temperature detecting unit 11 comprises the first temperature sensor 110 and the first temperature modulate circuit 111; Current detecting unit 12 comprises current sensor 121 and the first current regulating circuit 122.Concrete annexation is:
First temperature sensor 110 is arranged at current sensor 121 place, for detecting the temperature of current sensor 121, and is connected with the first temperature modulate circuit 111.
First temperature modulate circuit 111 is nursed one's health the signal that the first temperature sensor 110 exports, and is connected with controller 13.
Current sensor 121, through transmission line of electricity, for detecting the electric current flowing through transmission line of electricity, and is connected with the first current regulating circuit 122.
First current regulating circuit 122 is nursed one's health for the signal exported current sensor 121, and is connected with controller 13.
The signal that controller 13 utilizes the first temperature modulate circuit 111 to export carries out temperature adjustmemt to the signal that the first current regulating circuit 122 exports.
Current sensor is a kind of pick-up unit, can experience the signal of tested electric current, and the signal detected can be converted to according to certain rules the electric signal output meeting certain standard needs.Therefore be widely used in commercial production.
Such as, in photovoltaic system, current sensor is for detecting the electric current of transmission line of electricity.In current detecting, normally transmission line of electricity is passed current sensor, when transmission line of electricity has electric current to flow through, being then reflected as current sensor has output signal.Multi-form due to current sensor, therefore, for multi-form current sensor, its output signal is also different.If the environment temperature residing for current sensor is constant; its measuring accuracy is also constant in the ideal case; but due to the current sensor in work and transmission line of electricity close together; and transmission line of electricity can cause temperature to rise usually because loaded current is excessive; therefore, the environment temperature residing for current sensor also can rise.Temperature is the important parameter affecting current sensor accuracy of detection, so the impact of the accuracy of detection on current sensor too high or too low for temperature is more obvious.
For powerful photovoltaic DC-to-AC converter, the electric current flowing through transmission line of electricity is comparatively large, and the temperature of transmission line of electricity is also very high, and the temperature therefore residing for current sensor is also higher, causes the accuracy of detection of current sensor to reduce.
The utility model considers the impact of temperature for current sensor accuracy of detection, as shown in Figure 1.Current sensor 121 place is provided with the first temperature detecting unit 11, and this temperature detecting unit comprises the first temperature sensor 110 and the first temperature modulate circuit 111.
Wherein, the temperature signal experienced is converted into corresponding signal (this signal is generally analog voltage signal) by the first temperature sensor 110, and this signal is fainter, in order to follow-up convenient utilization, need this signal to export in modulate circuit to nurse one's health, namely the first temperature sensor 110 is connected with the first temperature modulate circuit 111.First temperature modulate circuit 111 is nursed one's health this signal, exports in controller 13.
Current sensor is through transmission line of electricity, and when transmission line of electricity has electric current through out-of-date, it can detect the electric current flowing through transmission line of electricity, namely can produce the output signal corresponding with this current signal.This output signal is usually fainter, and useful signal amplitude is less, even there is undesired signal.Therefore need through modulate circuit, namely current sensor 121 is connected with the first current regulating circuit 122.The signal that first 122 pairs, current regulating circuit current sensor 121 exports is nursed one's health.Although the first current regulating circuit 122 has carried out the conditionings such as amplitude becomes large, filtering to this signal, but due to the temperature variation residing for current sensor 121, its signal magnitude exported accurately can not reflect the current signal size flowing through transmission line of electricity, and namely Output rusults has error.
In order to accurately detect the current signal size flowing through transmission line of electricity, the Signal transmissions that the first temperature modulate circuit 111 need be exported is to controller 13.There are two signals in this Time Controller 13, the signal that controller 13 utilizes the first temperature modulate circuit 111 to export carries out temperature adjustmemt to the signal that the first current regulating circuit 122 exports.Therefore, can accurately reflect the electric current flowing through transmission line of electricity through the revised signal of controller 13, thus improve current detection accuracy.
In sum, the signal that current sensor exports carries out temperature adjustmemt through controller, thus improves the current detection accuracy of transmission line of electricity in photovoltaic inverting system.In addition, the first temperature modulate circuit and the first current regulating circuit can amplify signal, and filtering etc., antijamming capability is strong.
In addition, the said first temperature modulate circuit of the present embodiment and the first current regulating circuit are used for feeble signal to amplify, filtering etc., although be all modulate circuit, need according to the suitable modulate circuit of different signal behavior.Here wouldn't repeat because modulate circuit belongs to common technology to those skilled in the art.In addition, the signal that controller utilizes the first temperature modulate circuit to export is revised the signal that the first current regulating circuit exports, and adopts existing temperature correction, no longer describes in detail here.In enforcement, controller can adopt the existing chip with temperature adjustmemt function.
Embodiment two
Fig. 2 is the structural drawing of the another kind of combined sensor that the utility model provides.Below the structure of the combined sensor shown in Fig. 2 is described.
Combined sensor comprises: the first temperature detecting unit 11, current detecting unit 12, controller 13 and the second temperature detecting unit 14.First temperature detecting unit 11 comprises the first temperature sensor 110 and the first temperature modulate circuit 111; Current detecting unit 12 comprises current sensor 121 and the first current regulating circuit 122; Second temperature detecting unit 14 comprises the second temperature sensor 141 and the second temperature modulate circuit 142.Because the first temperature detecting unit 11 in the present embodiment, current detecting unit 12, controller 13 are identical with the structure of embodiment one, here only provide the annexation of the second temperature detecting unit 14 in detail, the annexation of other devices and the course of work are see embodiment one.
Second temperature sensor 141 is arranged at transmission line of electricity place, for detecting the temperature of transmission line of electricity, and is connected with the second temperature modulate circuit 142.Second temperature modulate circuit 142 is nursed one's health for the signal exported the second temperature sensor 141, and is connected with controller 13.
In concrete enforcement, the electric current flowing through transmission line of electricity is usually very large, and therefore the temperature of transmission line of electricity can rise thereupon, has a strong impact on the safe operation of transmission line of electricity and even whole photovoltaic inverting system.
The temperature inversion of the transmission line of electricity experienced is corresponding signal (this signal is generally analog voltage signal) by the second temperature sensor 141, and this signal is fainter, in order to follow-up convenient utilization, need this signal to export in modulate circuit to nurse one's health, namely the second temperature sensor 141 is connected with the second temperature modulate circuit 142.Second temperature modulate circuit 142 is nursed one's health this signal, and is exported in controller 13 by the signal after conditioning.Controller 13 judges the temperature of transmission line of electricity according to the signal that the second temperature modulate circuit 142 exports, when temperature is too high, and can alarm.
The present embodiment adds the second temperature detecting unit on the basis of embodiment one, for detecting the temperature of transmission line of electricity, at any time to the temperature detection of transmission line of electricity, can reduce the probability of happening of fire.
It should be noted that, in the present embodiment, the second temperature sensor can be arranged at the surface of transmission line of electricity, and what now the second temperature sensor detected is the temperature on transmission line of electricity surface.In enforcement, the second temperature sensor can also be integrated in transmission line of electricity inside, what now the second temperature sensor detected is the temperature of transmission line of electricity inside, and accuracy of detection is higher.
In addition, in embodiment one and embodiment two, the first temperature sensor can be arranged at the outside of current sensor, such as, be arranged at the upside of current sensor.Preferably, the first temperature sensor can be arranged at the inside of current sensor, now, the first temperature sensor can detect the temperature of current sensor more accurately.
Embodiment three
Fig. 3 is the structural drawing of the another kind of combined sensor that the utility model provides.Below the structure of the combined sensor shown in Fig. 3 is described.
Combined sensor comprises: current sensor 21, first temperature sensor 22, current regulating circuit 23 and controller 24.Wherein, current sensor 21 has temperature adjustmemt function.Concrete annexation is:
First temperature sensor 22 is arranged at current sensor 21 place, for detecting the temperature of current sensor 21, and is connected with the temperature signal input of current sensor 21.
Current sensor 21, through transmission line of electricity, for detecting the electric current flowing through transmission line of electricity, and is connected with current regulating circuit 23.
Current regulating circuit 23 is nursed one's health for the signal exported current sensor 21, and is connected with controller 24.
The utility model considers the impact of temperature for current sensor accuracy of detection, and as shown in Figure 3, this current sensor 21 can not only sensed current signal, can also receive temperature signal, and carry out temperature adjustmemt based on temperature signal to current signal.
When current sensor 21 works, the temperature signal detected is transferred to current sensor 21 by the first temperature sensor 22.Current sensor 21 utilizes the temperature signal received to carry out temperature adjustmemt to the current signal experienced, and the signal that namely current sensor 21 exports is through the signal after temperature adjustmemt.This output signal is usually fainter, and useful signal amplitude is less, even there is undesired signal.Therefore need through modulate circuit, namely current sensor 21 is connected with current regulating circuit 23.The signal that the current regulating circuit 23 pairs of current sensors 21 export is nursed one's health, and mainly comprises that amplitude becomes large, filtering etc.Current regulating circuit 23 by conditioning after Signal transmissions to controller 24.
In sum, the current sensor in this combined sensor has temperature adjustmemt function, and the current signal that the temperature signal that can be exported by the first temperature sensor is experienced self carries out temperature adjustmemt, thus improves the current detection accuracy of transmission line of electricity.In addition, current regulating circuit can amplify signal, filtering etc., and antijamming capability is strong.
In addition, the said current regulating circuit of the present embodiment is used for carrying out amplification process, filtering process etc. to feeble signal.Current regulating circuit adopts existing circuit, no longer describes in detail here.
In enforcement, the first temperature sensor can be arranged at the outside of current sensor.Preferably, be built in current sensor by the first temperature sensor, can improve integrated level on the one hand, on the other hand, the first temperature sensor can detect the temperature of current sensor more accurately.
Embodiment four
Fig. 4 is the structural drawing of the another kind of combined sensor that the utility model provides.Below the structure of the combined sensor shown in Fig. 4 is described.
Combined sensor comprises: current sensor 21, first temperature sensor 22, current regulating circuit 23, controller 24 and temperature detecting unit 25.Temperature detecting unit 25 comprises the second temperature sensor 251 and temperature modulate circuit 252.Wherein, first temperature sensor 22 is built in current sensor 21, due to the similar of the first temperature sensor 22, current sensor 21, current regulating circuit 23, controller 24 and the embodiment three in the present embodiment, here only provide the annexation of temperature detecting unit 25 in detail, the annexation of other devices and the course of work are see embodiment three.
Second temperature sensor 251 is arranged at transmission line of electricity place, for detecting the temperature of transmission line of electricity, and is connected with temperature modulate circuit 252.
Temperature modulate circuit 252 is nursed one's health for the signal exported the second temperature sensor 251.
In concrete enforcement, as in photovoltaic inverting system, the electric current flowing through transmission line of electricity is usually very large, and therefore the temperature of transmission line of electricity can rise thereupon, has a strong impact on transmission line of electricity, and even the safe operation of whole photovoltaic inverting system.
The temperature inversion of the transmission line of electricity experienced is corresponding signal (this signal is generally voltage signal) by the second temperature sensor 251, because this signal is fainter, in order to follow-up convenient utilization, need this signal to export in modulate circuit to nurse one's health, namely the second temperature sensor 251 is connected with temperature modulate circuit 252.Temperature modulate circuit 252 is nursed one's health this signal, and by the Signal transmissions after conditioning to controller 24.The signal that controller 24 can export according to temperature modulate circuit 252 judges the temperature of transmission line of electricity, when temperature is too high, and can alarm.
The present embodiment adds temperature detecting unit on the basis of embodiment three, for detecting the temperature of transmission line of electricity, can detect the temperature of transmission line of electricity at any time, the probability of happening of reduction accident.
In the present embodiment, the second temperature sensor 251 can be arranged at the surface of transmission line of electricity, and what now the second temperature sensor 251 detected is the temperature on transmission line of electricity surface.In enforcement, the second temperature sensor 251 can also be integrated in transmission line of electricity inside, what now the second temperature sensor 251 detected is the temperature of transmission line of electricity inside, and accuracy of detection is higher.
It should be noted that, in the various embodiments described above, no matter be that the signal that the controller in combined sensor is exported by temperature sensor is revised the signal that current sensor exports, or the signal that current sensor self is exported by temperature sensor is revised output signal, can improve the current detection accuracy of transmission line of electricity.
Above combined sensor provided by the utility model is described in detail.Apply specific case herein to set forth principle of the present utility model and embodiment, the explanation of above embodiment just understands method of the present utility model and core concept thereof for helping.Should be understood that; for those skilled in the art; under the prerequisite not departing from the utility model principle, can also carry out some improvement and modification to the utility model, these improve and modify and also fall in the protection domain of the utility model claim.
Claims (10)
1. a combined sensor, for the detection of transmission line of electricity in photovoltaic inverting system, is characterized in that, described combined sensor comprises the first temperature detecting unit, current detecting unit and controller;
Described first temperature detecting unit comprises the first temperature sensor and the first temperature modulate circuit; Described first temperature sensor is arranged at described current sensor place, detects the temperature of described current sensor; Described first temperature modulate circuit is connected with described first temperature sensor, nurses one's health the signal that described first temperature sensor exports, and described first temperature modulate circuit is connected with described controller simultaneously;
Described current detecting unit comprises current sensor and the first current regulating circuit; Described current sensor passes described transmission line of electricity, detects the electric current flowing through described transmission line of electricity; Described first current regulating circuit is connected with described current sensor, nurses one's health the signal that described current sensor exports, and described first current regulating circuit is connected with described controller simultaneously;
The signal that described controller utilizes described first temperature modulate circuit to export carries out temperature adjustmemt to the signal that described first current regulating circuit exports.
2. combined sensor as claimed in claim 1, it is characterized in that, described first temperature sensor is arranged at the inside of described current sensor.
3. combined sensor as claimed in claim 1 or 2, it is characterized in that, also comprise the second temperature detecting unit, described second temperature detecting unit comprises the second temperature sensor and the second temperature modulate circuit;
Described second temperature sensor is arranged at described transmission line of electricity place, detects the temperature of described transmission line of electricity;
Described second temperature modulate circuit is connected with described second temperature sensor, nurses one's health the signal that described second temperature sensor exports, and described second temperature modulate circuit is connected with described controller simultaneously.
4. combined sensor as claimed in claim 3, it is characterized in that, described second temperature sensor is arranged at the surface of described transmission line of electricity.
5. combined sensor as claimed in claim 3, is characterized in that, it is inner that described second temperature sensor is integrated in described transmission line of electricity.
6. a combined sensor, for the detection of transmission line of electricity in photovoltaic inverting system, it is characterized in that, described combined sensor comprises the first temperature sensor, current sensor, current regulating circuit and controller, wherein, described current sensor has temperature adjustmemt function;
Described first temperature sensor is arranged at described current sensor place, detects the temperature of described current sensor, and described first temperature sensor is connected with the temperature signal input of described current sensor;
Described current sensor passes described transmission line of electricity, detects the electric current flowing through described transmission line of electricity;
Described current regulating circuit is connected with described current sensor, nurses one's health the signal that described current sensor exports, and described current regulating circuit is connected with described controller simultaneously.
7. combined sensor as claimed in claim 6, it is characterized in that, described first temperature sensor is arranged at the inside of described current sensor.
8. combined sensor as claimed in claims 6 or 7, is characterized in that, also comprise temperature detecting unit;
Described temperature detecting unit comprises the second temperature sensor and temperature modulate circuit;
Described second temperature sensor is arranged at described transmission line of electricity place, detects the temperature of described transmission line of electricity;
Described temperature modulate circuit is connected with described second temperature sensor, nurse one's health the signal that described second temperature sensor exports, and described temperature modulate circuit is connected with described controller simultaneously.
9. combined sensor as claimed in claim 8, it is characterized in that, described second temperature sensor is arranged at the surface of described transmission line of electricity.
10. combined sensor as claimed in claim 8, is characterized in that, it is inner that described second temperature sensor is integrated in described transmission line of electricity.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643634.4U CN204166038U (en) | 2014-10-30 | 2014-10-30 | A kind of combined sensor |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420643634.4U CN204166038U (en) | 2014-10-30 | 2014-10-30 | A kind of combined sensor |
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| Publication Number | Publication Date |
|---|---|
| CN204166038U true CN204166038U (en) | 2015-02-18 |
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| CN201420643634.4U Active CN204166038U (en) | 2014-10-30 | 2014-10-30 | A kind of combined sensor |
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| CN (1) | CN204166038U (en) |
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2014
- 2014-10-30 CN CN201420643634.4U patent/CN204166038U/en active Active
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