CN205317908U - Anti -jamming battery voltage observation circuit - Google Patents
Anti -jamming battery voltage observation circuit Download PDFInfo
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- CN205317908U CN205317908U CN201521001233.XU CN201521001233U CN205317908U CN 205317908 U CN205317908 U CN 205317908U CN 201521001233 U CN201521001233 U CN 201521001233U CN 205317908 U CN205317908 U CN 205317908U
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Abstract
The utility model discloses an anti -jamming battery voltage observation circuit, including signal input circuit and battery monitoring facilities, battery monitoring facilities is including signal amplification circuit, signal isolation circuit, signal filtering circuit and the AD converting circuit of electricity connection in proper order, signal input circuit is connected with the signal amplification circuit electricity, signal amplification circuit, signal filtering circuit and AD converting circuit pass through the signal isolation circuit and realize the electric isolation for there is not direct electrical connection relation each other. The utility model discloses a signal amplification circuit, signal filtering circuit and AD converting circuit's electric isolation has improved the common mode rejection ability for voltage monitoring value more is close the actual value.
Description
Technical field
The present invention relates to store battery field, it is specifically related to a kind of anti-interference accumulator voltage monitoring circuit.
Background technology
On-line monitoring single battery voltage can be user and judges the basis for estimation that the running status of store battery and health degree provide important. owing to secondary battery uses with power rectifier equipment or the parallel connection of power inverter equipment in the power supply system, power rectifier equipment and power inverter equipment can produce very big noise, and these noises can be superimposed upon in secondary battery. when this kind of noise is very big, can cause some accumulator monitoring equipment cannot accurate measurements single battery voltage, even error is very big. in order to address this problem, noise must be suppressed, prior art adopts the difference circuit being made up of operational amplifier or the difference circuit that is made up of instrument amplifier to be suppressed by noise usually, these circuit can suppress certain noise, for the occasion that noise is little, really there is effect, but in many instances, owing to the output rating of power rectifier equipment or power inverter equipment is very big, the noise produced is very big, the output noise voltage of power rectifier equipment or power inverter equipment is greater than the working power voltage of voltage collection circuit, or exceed the input reference signal of Acquisition Circuit, voltage monitoring value is caused to deviate store battery actual voltage value far away, or monitoring value is very unstable, cannot correctly monitor single battery voltage.
Summary of the invention
It is an object of the invention to address the deficiencies of the prior art, it is provided that a kind of anti-interference accumulator voltage monitoring circuit, the technical scheme of employing is as follows:
A kind of anti-interference accumulator voltage monitoring circuit, comprise signal input circuit and accumulator monitoring equipment, described accumulator monitoring equipment comprises the signal amplification circuit, signal isolation circuit, signal filter circuit and the A/D that are electrically connected successively and changes circuit, described signal input circuit is electrically connected with signal amplification circuit, and described signal amplification circuit, signal filter circuit and A/D change circuit and realize electrical isolation by signal isolation circuit.
As preferably, the signal modulation circuit that described signal isolation circuit comprises with signal amplification circuit output terminal is electrically connected, described signal modulation circuit has been electrically connected matching transformer and demodulator circuit successively, described demodulator circuit has been electrically connected vibrator, described vibrator has been electrically connected working power VDD and supply transformer respectively, and described supply transformer has been electrically connected rectification and filtering circuit and signal modulation circuit respectively.
Signal isolation circuit have employed two transformers, input signal is modulated into the pulsation signal of certain frequency through signal modulation circuit, this pulse signal is coupled into the pulse signal of same frequency through matching transformer, is then demodulated to continuous print simulating signal through demodulator circuit again. Vibrator is demodulator circuit and supply transformer offer work clocksignal simultaneously, and this work clocksignal, after supply transformer is coupled, is again signal modulation circuit offer clock. Rectification and filtering circuit are the output rectifier and filter of supply transformer, output power supply VCC, VEE and VSS, thus realize the electrical isolation that signal amplification circuit, signal filter circuit and A/D change circuit, it is to increase common mode inhibition capacity so that voltage monitoring value is closer to true value.
Compared with prior art, the beneficial effects of the utility model: the utility model realizes signal amplification circuit, signal filter circuit and A/D change circuit electrical isolation, it is to increase the common mode inhibition capacity of circuit so that voltage monitoring value is closer to true value.
Accompanying drawing explanation
Fig. 1 is system architecture figure of the present utility model;
Fig. 2 is the schematic circuit of accumulator monitoring equipment of the present utility model.
Embodiment
Below in conjunction with drawings and Examples, the utility model is described in further detail.
Embodiment: as shown in Figure 1, a kind of anti-interference accumulator voltage monitoring circuit, comprise signal input circuit and accumulator monitoring equipment, described accumulator monitoring equipment comprises the signal amplification circuit, signal isolation circuit, signal filter circuit and the A/D that are electrically connected successively and changes circuit, described signal input circuit is electrically connected with signal amplification circuit, and described signal amplification circuit, signal filter circuit and A/D change circuit and realize electrical isolation by signal isolation circuit.
As shown in Figure 2, the signal modulation circuit that described signal isolation circuit comprises with signal amplification circuit output terminal is electrically connected, described signal modulation circuit has been electrically connected matching transformer T1 and demodulator circuit successively, described demodulator circuit has been electrically connected vibrator, described vibrator has been electrically connected working power VDD and supply transformer T2 respectively, and described supply transformer T2 has been electrically connected rectification and filtering circuit and signal modulation circuit respectively.
Signal isolation circuit have employed two transformers, input signal is modulated into the pulsation signal of certain frequency through signal modulation circuit, this pulse signal is coupled into the pulse signal of same frequency through matching transformer T1, is then demodulated to continuous print simulating signal through demodulator circuit again. Vibrator provides work clocksignal for demodulator circuit and supply transformer T2 simultaneously, and this work clocksignal, after supply transformer T2 is coupled, is again signal modulation circuit offer clock. Rectification and filtering circuit are the output rectifier and filter of supply transformer, output power supply VCC, VEE and VSS, thus realize the electrical isolation that signal amplification circuit, signal filter circuit and A/D change circuit, it is to increase common mode inhibition capacity.
The present embodiment achieves signal amplification circuit, signal filter circuit and A/D change circuit electrical isolation, it is to increase the common mode inhibition capacity of circuit so that voltage monitoring value is closer to true value.
Claims (2)
1. an anti-interference accumulator voltage monitoring circuit, comprise signal input circuit and accumulator monitoring equipment, it is characterized in that, described accumulator monitoring equipment comprises the signal amplification circuit, signal isolation circuit, signal filter circuit and the A/D that are electrically connected successively and changes circuit, described signal input circuit is electrically connected with signal amplification circuit, and described signal amplification circuit, signal filter circuit and A/D change circuit and realize electrical isolation by signal isolation circuit.
2. a kind of anti-interference accumulator voltage monitoring circuit according to claim 1, it is characterised in that,
The signal modulation circuit that described signal isolation circuit comprises with signal amplification circuit output terminal is electrically connected, described signal modulation circuit has been electrically connected matching transformer and demodulator circuit successively, described demodulator circuit has been electrically connected vibrator, described vibrator has been electrically connected working power VDD and supply transformer respectively, and described supply transformer has been electrically connected rectification and filtering circuit and signal modulation circuit respectively.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
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CN201521001233.XU CN205317908U (en) | 2015-12-07 | 2015-12-07 | Anti -jamming battery voltage observation circuit |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
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CN201521001233.XU CN205317908U (en) | 2015-12-07 | 2015-12-07 | Anti -jamming battery voltage observation circuit |
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CN205317908U true CN205317908U (en) | 2016-06-15 |
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CN201521001233.XU Active CN205317908U (en) | 2015-12-07 | 2015-12-07 | Anti -jamming battery voltage observation circuit |
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Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108832714A (en) * | 2016-07-27 | 2018-11-16 | 国网江苏省电力公司常州供电公司 | A kind of active power distribution network intelligent terminal battery isolation monitoring device |
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2015
- 2015-12-07 CN CN201521001233.XU patent/CN205317908U/en active Active
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
CN108832714A (en) * | 2016-07-27 | 2018-11-16 | 国网江苏省电力公司常州供电公司 | A kind of active power distribution network intelligent terminal battery isolation monitoring device |
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