Summary of the invention
Technical matters to be solved by this invention is to provide a kind of wind-driven generator pitching electric battery on-line monitoring system, realize to become the on-line monitoring of oar electric battery, thereby guarantees that the safety of blower fan puts away the oars, and has improved the reliability of pitch system of wind driven generator.
In order to solve the problems of the technologies described above, wind-driven generator pitching electric battery on-line monitoring system provided by the invention, comprise: simple alternating current constant-current source circuit module, pumping signal is switched and coupled circuit module, receiving signal switches and coupled circuit module, receive Signal Matching and signal processing module and single-chip microcomputer, wherein, described simple alternating current constant-current source circuit module is switched and is connected with coupled circuit module with described pumping signal, described reception signal switching is connected with signal processing module with described reception Signal Matching with coupled circuit module, described reception Signal Matching is connected with described single-chip microcomputer with signal processing module.
Preferably, described tested battery is for becoming a monomer in oar electric battery.
Preferably, described change oar electric battery comprises three monomers, and each monomer is six joints batteries connected in series.
Preferably, described simple alternating current constant-current source circuit module comprises sine wave signal generator, constant current controlling and driving circuits, power signal sampling and translation circuit and power amplification circuit, wherein, described sine wave signal generator is connected with described constant current controlling and driving circuits, described constant current controlling and driving circuits is connected with described power amplification circuit, and described power amplification circuit is connected with described constant current controlling and driving circuits with translation circuit by power signal sampling.
Preferably, described reception signal switches and the use of coupled circuit module mesohigh Capacitance parallel connection.
Preferably, described pumping signal is switched identical with the structure of coupled circuit module and the switching of described reception signal and coupled circuit module.
Preferably, described reception Signal Matching and signal processing module comprise match circuit, amplifying circuit, circuit and filter circuit module multiply each other.
Preferably, described wind-driven generator pitching electric battery on-line monitoring system, also comprises: the battery voltage monitoring module being connected with described single-chip microcomputer, environment temperature monitoring modular and battery charging and discharging stream monitoring modular.
Preferably, described wind-driven generator pitching electric battery on-line monitoring system, also comprises: the CAN bus module being connected with described single-chip microcomputer.
Preferably, described wind-driven generator pitching electric battery on-line monitoring system, also comprises: the demonstration being connected with single-chip microcomputer and Keysheet module.
To sum up, wind-driven generator pitching electric battery on-line monitoring system provided by the invention, by employing, exchange four line impedence mensurations, by one, exchange constant current drive signal and be added in electric battery two ends by two lines, then measure and flow through the electric current of electric battery and the AC voltage drop that this electric current produces at electric battery two ends, can calculate the internal resistance value of battery thus, wherein, the AC voltage drop signal that electric battery two ends produce is taken out by another two lines, has effectively overcome the impact of conductor resistance on electric battery internal resistance measurement precision.
Embodiment
Below in conjunction with the drawings and specific embodiments, the present invention is further detailed explanation.
With reference to the electric battery of wind-driven generator pitching shown in Fig. 1 on-line monitoring system, comprise: simple alternating current constant-current source circuit module, pumping signal is switched and coupled circuit module, receiving signal switches and coupled circuit module, receive Signal Matching and signal processing module and single-chip microcomputer, wherein, described simple alternating current constant-current source circuit module is switched and is connected with coupled circuit module with described pumping signal, described pumping signal is switched with coupled circuit module and is switched and be connected at tested battery positive and negative electrode end with coupled circuit module with described reception signal, form battery 4 line Measurement architecture processed, described pumping signal is switched to be connected with coupled circuit module by tested battery and is switched and be connected with coupled circuit module with described reception signal, described reception signal switching is connected with signal processing module with described reception Signal Matching with coupled circuit module, described reception Signal Matching is connected with described single-chip microcomputer with signal processing module.
In actual application, described tested battery is for becoming a monomer in oar electric battery.Common change oar electric battery comprises three monomers, and each monomer is six joints batteries connected in series, and the battery symbol in Fig. 1 represents respectively three monomers.Simple alternating current constant-current source circuit module produces simple alternating current constant current drive signal, wind-driven generator pitching battery backup power source is generally comprised of three electric battery, and tested battery voltage is higher, need to switch with coupled circuit module simple alternating current constant current drive signal is accessed to tested electric battery two ends by pumping signal, the AC voltage drop signal that simple alternating current constant current drive signal produces at electric battery two ends, by receiving, signal switches and coupling basic circuit module is taken out AC voltage drop, send into and receive Signal Matching and signal processing module, in receiving Signal Matching and signal processing module, carry out impedance matching, amplify, filtering, with the Noise and Interference beyond filtering passband, multiply each other with pumping signal afterwards, relevant treatment, effectively suppress the impact of interference and noise, through low-pass filtering, obtain and the proportional direct current signal of electric battery internal resistance again, send into the A/D port of single-chip microcomputer, by calculating after analog to digital conversion, obtain internal resistance data.Concrete by described reception Signal Matching and included match circuit, the amplifying circuit of signal processing module, multiply each other circuit and filter circuit module, completed.Further introduce, in the present embodiment, with three monomers, each monomer is that six joints battery connected in series is the explanation that example is carried out, and in actual application, monomer and battery can also adopt other array modes.
Further, described simple alternating current constant-current source circuit module comprises sine wave signal generator, constant current controlling and driving circuits, power signal sampling and translation circuit and power amplification circuit, wherein, described sine wave signal generator is connected with described constant current controlling and driving circuits, described constant current controlling and driving circuits is connected with described power amplification circuit, and described power amplification circuit is connected with described constant current controlling and driving circuits with translation circuit by power signal sampling.
In actual application, referring to Fig. 2, simple alternating current constant-current source circuit module is the current negative feedback circuit of a closed-loop control.Sine wave signal generator produces a frequency stabilization, symmetry, 1KHz left and right sine wave signal that degree of distortion is low.Power amplification circuit carries out power amplification sine wave signal, obtains simple sinusoidal alternating current output.Constant current controlling and driving circuits, the feedback signal obtaining from power amplifier output, by comparing with given signal, regulates the signal of driving circuit, thereby makes the electric current of output power signal keep constant.More specifically, the circuit diagram of constant current controlling and driving circuits can be referring to Fig. 3.
Further, described reception signal switches and the use of coupled circuit module mesohigh Capacitance parallel connection.
The reception signal switching specifically providing referring to Fig. 4 and the structural representation of coupled circuit, high-voltage capacitance is in parallel to be used, and can realize high pressure stopping direct current, reduces conduction impedance to the impact of measuring simultaneously.The switching controls of relay can realize by a set of metering circuit and complete the measurement to many Battery packs group.In actual applications, it is identical with the structure of coupled circuit module and the switching of described reception signal and coupled circuit module that described pumping signal is switched, and just the input and output of signal are different.Supplement to introduce, provided the electrical block diagram adopting in some reality in the present embodiment, the technology that is comparative maturity based on adopted circuit structure, repeats no more in literary composition, separately, the circuit structure that adopts can replace with flexibly the circuit structure of identical effect.
Further, described wind-driven generator pitching electric battery on-line monitoring system also comprises: the battery voltage monitoring module being connected with described single-chip microcomputer, environment temperature monitoring modular and battery charging and discharging stream monitoring modular.
In actual applications, Single-chip Controlling sequentially completes after the test of all electric battery internal resistances, the temperature sensor signal of sending into according to environment temperature monitoring modular records ambient temperature value, the charge and discharge stream transducing signal of sending into electric battery according to battery charging and discharging stream monitoring modular records charge and discharge flow valuve, and the battery voltage transducing signal of sending into according to battery voltage monitoring module records the magnitude of voltage of electric battery.
Further, described wind-driven generator pitching electric battery on-line monitoring system also comprises: the CAN bus module being connected with described single-chip microcomputer.
In actual applications, CAN bus module is used for carrying out data communication with host computer.
Further, described wind-driven generator pitching electric battery on-line monitoring system also comprises: the demonstration being connected with single-chip microcomputer and Keysheet module.
In practical application, show and Keysheet module is used for initialization system initial parameter, display measurement data etc.
Wind-driven generator pitching electric battery on-line monitoring system of the present invention is widely used in the wind powered generator system using battery pack as wind-driven generator pitching standby power supply, Main Function is to monitor that the capacity of battery pack is, the information such as duty of the aging and battery charger of accumulator, and by accumulator correlation parameter communication to long distance control system, accomplish to give warning in advance, thereby guarantee the object that blower fan is put away the oars safely, further improve the reliability of pitch system of wind driven generator.Same, this programme also can be applicable in the test of lithium battery and Ni-MH battery etc., and the fields such as communication, military affairs that can in like manner be applied to are used in the on-line monitoring of the systems such as accumulator, lithium battery.
Above wind-driven generator pitching electric battery on-line monitoring system provided by the present invention is described in detail, applied specific case herein principle of the present invention and embodiment are set forth, the explanation of above embodiment is just for helping to understand method of the present invention and core concept thereof; , for one of ordinary skill in the art, according to thought of the present invention, all will change in specific embodiments and applications, in sum, this description should not be construed as limitation of the present invention meanwhile.