CN101706558A - On-line monitoring system for direct-current power supply and storage battery - Google Patents
On-line monitoring system for direct-current power supply and storage battery Download PDFInfo
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- CN101706558A CN101706558A CN 200910108924 CN200910108924A CN101706558A CN 101706558 A CN101706558 A CN 101706558A CN 200910108924 CN200910108924 CN 200910108924 CN 200910108924 A CN200910108924 A CN 200910108924A CN 101706558 A CN101706558 A CN 101706558A
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Abstract
The invention discloses an on-line monitoring system for a direct-current power supply and a storage battery, which comprises an on-line monitor, a monitoring centre, a user terminal, a monitoring network and a management network, wherein the on-line monitor consists of a CPU, a storage battery voltage and internal resistance test unit, a direct-current charger characteristic test unit, a power supply unit, a communication unit, an input-output unit, a fault alarm unit, a reset unit and a storage unity, monitors a field storage battery and the direct-current charger online and transmits monitoring data to the monitoring centre through the monitoring network; the monitoring centre is a large-scale server, which receives the monitoring data transmitted from the on-line monitor and performs storage management on the monitoring data in a large-scale database mode; the system responses various commands of the user terminal, and receives the commands of the user terminal to perform various controls on the on-line monitor installed on-site.
Description
Technical field
The present invention relates to a kind of direct supply and accumulator on-line monitoring system, belong to the detection technique field.
Background technology
The backup power system of being made up of accumulator and dc charging motor is as the important component part of power-supply system, playing reserve power, deal with the unusual and particular job situation of electrical network, keep the key effect that system runs well, is to need highly reliable electric energy to ensure the last line of defense in field.This system is widely used in industry fields such as electric power, communication, government bodies, finance, security, insurance, radio and television, communications and transportation, manufacturing, army, education, scientific research, communal facility.The stability of backup power system and the actual capacity that can offer load in discharge process have crucial meaning to the safe operation of guaranteeing equipment.But in actual applications; owing to lack effective monitoring means; can not grasp the state of backup power system in time, exactly; can't eliminate the hidden danger of existence; in electric power supply unusual or when interrupting backup power system can not normally devote oneself to work; or very short just inefficacy of working time, thereby causing power outage, the example that produces heavy economic losses is of common occurrence.
Owing to be subjected to the restriction of current techniques diagnostic level, the mode of manual inspection mostly taked in the detection of backup power system, or, is existed a lot of defectives only at the on-line monitoring mode of the function singleness of accumulator:
1, the defective of manual inspection mode: (1) security risk is big.Because the field condition complexity, the space is little, voltage is high, and exists inflammable and corrosive gas, the staff detects to on-the-spot, has bigger risk.(2) waste time and energy, the cost height, work efficiency is low; (3) can't grasp the situation of field apparatus whenever and wherever possible, when potential safety hazard occurring, can't learn immediately, often lead to major accident, cause great economy and personal casualty loss.(4) can't realize status of equipment take advantage of a favourable situation the prediction.When (5) data volume was big, data management and various form, query statistic be difficulty comparatively.
2, the viewpoint of system of no use is come problem of perception.In fact, straight-flow system is comprising a plurality of subsystems, and each subsystem influences each other.Accumulator is one of them subsystem.Only at the detection of the function singleness of accumulator, the defective of monitoring mode: accumulator is complicated electrochemical product, for guaranteeing its normal use and life-saving, needs meticulous administering and maintaining.A lot of accumulators are not damaged, but fill badly, and its basic reason is that particularly indexs such as the precision of voltage regulation, precision of steady current, ripple voltage coefficient are relatively poor, cause accumulator to damage in early days because the characteristic of charging set is relatively poor.
Therefore,, need a kind of direct supply and accumulator on-line monitoring system, direct supply and accumulator are carried out comprehensive monitoring for guaranteeing the reliability of backup power system.
Summary of the invention
The objective of the invention is to: a kind of direct supply and accumulator on-line monitoring system are provided, direct supply and accumulator are carried out comprehensive monitoring, guarantee the reliability of backup power system.
In order to overcome above-mentioned deficiency, the invention provides the up-to-date direct supply and the accumulator on-line monitoring system that improve above-mentioned deficiency. the present invention solves the scheme that its technical matters adopts and is: a kind of direct supply and accumulator on-line monitoring system, described system is by the on-line monitoring instrument, monitoring center, user terminal, monitoring network, supervising the network is formed. and described on-line monitoring instrument is by CPU, battery tension internal resistance test cell, dc charging motor characteristic test unit, power supply unit, communication unit, input-output unit, the fault alarm unit, reset unit, memory cell is formed, realization is sent to described monitoring center to the on-line monitoring of on-the-spot accumulator and dc charging motor and with Monitoring Data by described monitoring network. and described monitoring center is a large server, moving the database application management software, receive the Monitoring Data that described on-line monitoring instrument transmits, and Monitoring Data is carried out storage management with the large database form; Respond the various command of described user terminal, transmit data via described supervising the network to described user terminal with the form of webpage; Connecing the described order that is subjected to user terminal and carry out various controls being installed on on-the-spot described on-line monitoring instrument. described user terminal is many personal computers, by the described monitoring center of browser access and issue various access control orders, receiving the web data that described monitoring center is transmitted, realize the accumulator at scene and the on-line monitoring of dc charging motor. monitoring network, supervising the network are realized the intercommunication mutually between online monitor, monitoring center, the user terminal.
Preferably, described battery tension internal resistance test cell is made up of CPU, high-power MOS tube, coupling capacitance, operational amplifier, multi-way switch, bandpass filter able to programme, low-pass filter, modulus converter A/D, digital to analog converter D/A etc.; High-power MOS tube is connected on battery discharging and detects in the loop, makes battery discharging to produce the sine wave AC exciting current signal of setpoint frequency by CPU control high-power MOS tube, induces corresponding ac voltage signal on the accumulator anode and cathode post; In the time of CPU control modulus converter A/D sampling ac current signal, also control the alternating voltage of multi-way switch and digital to analog converter A/D sampling accumulator anode and cathode intercolumniation; Ac current signal and ac voltage signal are removed DC component through described coupling capacitance, by described operational amplifier signal are amplified, and send into digital to analog converter A/D again after described bandpass filter able to programme is removed undesired signal and become digital signal; CPU control digital to analog converter A/D high-speed sampling, and all sampled datas are sent into described CPU carry out digital signal processing, CPU further calculates parameters such as the real part, imaginary part, phase place, effective value of electric current, voltage signal, the internal resistance that finally draws accumulator again.
Preferably, described battery tension internal resistance test cell is made up of CPU, high-power MOS tube, coupling capacitance, operational amplifier, multi-way switch, bandpass filter able to programme, low-pass filter, modulus converter A/D, digital to analog converter D/A etc.; High-power MOS tube is connected on battery discharging and detects in the loop, makes battery discharging to produce the sine wave AC exciting current signal of setpoint frequency by CPU control high-power MOS tube, also induces corresponding ac voltage signal on the line between accumulator; In the time of CPU control modulus converter A/D sampling ac current signal, also control the alternating voltage on the line between multi-way switch and digital to analog converter A/D sampling accumulator; Ac current signal and ac voltage signal are removed DC component through described coupling capacitance, by described operational amplifier signal are amplified, and send into digital to analog converter A/D again after described bandpass filter able to programme is removed undesired signal and become digital signal; CPU control digital to analog converter A/D high-speed sampling, and all sampled datas are sent into described CPU carry out digital signal processing, CPU further calculates parameters such as the real part, imaginary part, phase place, effective value of electric current, voltage signal again, finally draws the connection resistances between accumulator.
Preferably, the voltage signal of every joint accumulator amplifies through operational amplifier, removes undesired signal through low-pass filter, becomes digital signal through modulus converter A/D again, sends into CPU afterwards, measures the voltage (DC component) of every joint accumulator.
Preferably, control described multi-way switch by CPU, can the sequence detection battery pack in internal resistance, the connection resistances between accumulator, the battery tension of every joint accumulator; Adopt the alternating current discharge method to measure the internal resistance of accumulator and the connection resistances between accumulator, the measuring-signal frequency can be avoided charging set ripple frequency and other undesired signal frequencies, be not subjected to the influence of direct current signal, can be implemented in internal resistance, voltage, and the connection resistances of on-line monitoring accumulator in the accumulator charging/discharging process; Adopted bandpass filter able to programme that current signal and voltage signal are carried out filtering, to adapt to the processing of different measuring frequency interfering signal.
Preferably, described dc charging motor characteristic test unit is by host CPU, form from CPU, operational amplifier, digital to analog converter D/A, high-speed synchronous modulus converter A/D, multi-way switch, low-pass filter etc.; Described host CPU is the LPC2468 chip, finishes functions such as control, demonstration, communication; Described is dsp chip from CPU, receives the digital signal that the high-speed synchronous analog to digital converter sends, and carries out high-speed data computing and processing; Described high-speed synchronous analog to digital converter has adopted a slice THS1206 high-speed synchronous modulus converter A/D, and precision is 12, and sampling rate is 6MSPS, can support the high-speed synchronous sampling of 4 road signals.
Preferably, the measurement of accumulator battery voltage: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of accumulator battery voltage measuring-signal, subtract each other with the accumulator battery voltage measuring-signal behind attenuator circuit, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal; The thousands of values of host CPU control high-speed synchronous modulus converter A/D high-speed sampling are sent into from CPU (DSP) and are carried out mathematics manipulation, get after the average as the accumulator battery voltage measured value; The measurement of battery pack charging and discharging currents: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of battery pack charging and discharging currents measuring-signal, subtract each other with the battery pack charging and discharging currents measuring-signal that records through Hall current sensor, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal; Thereby host CPU is by the enlargement factor of the automatic resonance-amplifier of control multi-way switch; The thousands of values of host CPU control high-speed synchronous modulus converter A/D high-speed sampling are sent into from CPU (DSP) and are carried out mathematics manipulation, get after the average measured value as battery pack charging and discharging currents measuring-signal.
Preferably, the measurement of the charging set precision of voltage regulation: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of measuring voltage, subtract each other with the voltage measurement signal behind attenuator circuit, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal; Host CPU control high-speed synchronous modulus converter A/D high-speed sampling is sent into from CPU and is carried out that digital operation is handled and the precision of voltage regulation that calculates charging set; The measurement of charging set precision of steady current: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of charging set current measurement signal, subtract each other with the charging set current measurement signal behind attenuator circuit, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal.Host CPU control high-speed synchronous modulus converter A/D high-speed sampling is sent into from CPU and is carried out that digital operation is handled and the precision of steady current that calculates charging set.The measurement of charging set ripple voltage coefficient: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of measuring voltage, subtract each other with the voltage measurement signal behind attenuator circuit, amplify through amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal; Thereby host CPU is by the enlargement factor of the automatic resonance-amplifier of control multi-way switch; Host CPU control high-speed synchronous modulus converter A/D high-speed sampling is sent into from CPU and is carried out that digital operation is handled and the ripple voltage coefficient that calculates charging set; The measurement of charging module current-sharing degree of unbalancedness: Hall current sensor measure current signal become digital signal through operational amplifier and modulus converter A/D and send into host CPU; Host CPU control multi-way switch can No. 1 output current to No. 8 charging modules of sequence detection, the computing method of charging module current-sharing degree of unbalancedness: β=[(I-I
P)/I
N] * 100%, β in the formula: current-sharing degree of unbalancedness; I: the ultimate value of actual measurement module output current; I
P: the mean value of N operational module output current; I
NThe load current value of-module.
Preferably, it is characterized in that: described dc charging motor characteristic test unit is provided with the current trigger threshold values, judge exactly and note the charging set battery pack after normal floating charge state → generation has a power failure back battery discharging state → incoming call, to change constant current pressure limiting charged state → voltage automatically over to and reach to change over to automatically after the setting value and be transferred to the so complete charge and discharge cycles process of normal floating charge state when modified constant-voltage charge state → electric current is reduced to setting value automatically, and calculate charging set in the floating charge duty, the precision of voltage regulation under the constant voltage and current limiting duty, the ripple voltage coefficient; Calculate precision of steady current and the charging module current-sharing degree of unbalancedness of charging set under constant current pressure limiting duty, and send these charging set performance index to host CPU.
Preferably, described communication unit comprises RS232, RS485, USB, LAN interface, can form monitoring network, and can communicate with other equipment such as discharge instrument, finish the property checked volume test to battery pack, intactly write down the variation of accumulator battery current, accumulator battery voltage, every joint battery tension in charge and discharge process, and produced nucleus holds form; Described reset unit is used for resetting to the on-line monitoring instrument; Described memory cell is SRAM, FLASH, EEPROM, can store test data; Described input-output unit is LCD, button, printer etc., realizes the demonstration of measurement data and the modification of measuring order parameter; Monitoring center receives the field monitoring data that online monitor transmits in real time by monitoring network, store and record with the form of database, and based on this database, regularly or according to operator command, generate accumulator nuclear and hold query statistic form under form, accumulator and charging set monthly magazine annual report, the different query composition statistical condition etc.
Direct supply of the present invention and accumulator on-line monitoring system, adopt Technology of Precision Measurement, signal analysis and processing technology, network technology and database management technology, to parameters such as the internal resistance of accumulator, voltage, electric current, temperature, characterisitic parameters such as the charging set precision of voltage regulation, precision of steady current, ripple voltage coefficient and charging module current-sharing degree of unbalancedness are monitored.Compare with traditional accumulator detection mode, have tangible advantage:
1, with the subsystem of battery pack, taken into full account of the influence of charging set characteristic, made a new step has been gone up in the monitoring and the management of accumulator, thereby improved the security and the reliability of total system accumulator as straight-flow system.
2, monitor the state of each joint accumulator in real time, find the accumulator of the backwardness in several ten thousand accumulators at any time and send warning at once, remind the maintenance management personnel in time to handle, guarantee the safety of electric power system.
3, to misoperation situation auto-real-time monitoring records such as system blackout discharge, incoming call chargings.
4, discharge instrument is controlled, need not manually be carried out taking out stitches and frequent detection record work of complicated wiring, finish whole nuclear discharge capacitor process automatically, and produced nucleus holds form automatically.
5, monitor parameters such as battery current, voltage, internal resistance, temperature in real time, when abnormal conditions took place, system reported to the police automatically, and the prompting maintenance management personnel in time handle, and prevents the generation of accident, ensures the safe operation of electric system.
6, each joint accumulator is all set up lifelong archives, and at any time archives have been upgraded, realized modern management, scientific management, fine-grained management.
7, human and material resources and financial resources have been saved.
Description of drawings
The present invention is further described below in conjunction with accompanying drawing:
Accompanying drawing 1 is the system construction drawing of a kind of direct supply of the present invention and accumulator on-line monitoring system;
Accompanying drawing 2 is hardware block diagrams of the on-line monitoring instrument of direct supply of the present invention and accumulator on-line monitoring system;
Accompanying drawing 3 is battery tension internal resistance test cell schematic diagrams of the on-line monitoring instrument of direct supply of the present invention and accumulator on-line monitoring system.
Accompanying drawing 4 is dc charging motor characteristic test unit schematic diagrams of the on-line monitoring instrument of direct supply of the present invention and accumulator on-line monitoring system.
Accompanying drawing 5 is change curves of accumulator voltage and current in whole discharge and charging process.
Embodiment
Of the present invention a kind of direct supply shown in Fig. 1～5 and accumulator on-line monitoring system, described system is by the on-line monitoring instrument, monitoring center, user terminal, supervising the network and monitoring network are formed. and described on-line monitoring instrument is by CPU, battery tension internal resistance test cell, dc charging motor characteristic test unit, power supply unit, communication unit, input-output unit, the fault alarm unit, reset unit, memory cell is formed, realization is sent to described monitoring center to the on-line monitoring of on-the-spot accumulator and dc charging motor and with Monitoring Data by described monitoring network. and described monitoring center is a large server, moving the database application management software, receive the Monitoring Data that described on-line monitoring instrument transmits, and Monitoring Data is carried out storage management with the large database form; Respond the various command that described user terminal is sent via supervising the network, transmit data via described supervising the network to described user terminal with the form of webpage; To accept the described order that is subjected to user terminal and carry out various controls to being installed on on-the-spot described on-line monitoring instrument via monitoring network. described user terminal is many personal computers, by the described monitoring center of browser access and issue various access control orders, receiving the web data that described monitoring center is transmitted, realize the accumulator at scene and the on-line monitoring of dc charging motor. monitoring network and supervising the network are realized the intercommunication mutually between online monitor, monitoring center, the user terminal.
The effect of the battery tension internal resistance test cell of on-line monitoring instrument is a voltage of measuring internal resistance, the connection resistances between accumulator and every joint accumulator of every joint accumulator, is made up of CPU, high-power MOS tube, coupling capacitance, operational amplifier, multi-way switch, bandpass filter able to programme, low-pass filter, modulus converter A/D, digital to analog converter D/A etc.1, the measurement of the internal resistance of every joint accumulator, the connection resistances between accumulator: high-power MOS tube is connected on battery discharging and detects in the loop, make battery discharging to produce the sine wave AC exciting current signal of setpoint frequency by CPU control high-power MOS tube, because the existence of connecting line resistance between accumulator internal resistance and accumulator, the exciting current signal will induce corresponding ac voltage signal on the accumulator anode and cathode post and on the connecting line between accumulator.In the time of CPU control modulus converter A/D sampling ac current signal, also control the alternating voltage of multi-way switch and digital to analog converter A/D sampling accumulator anode and cathode intercolumniation and the alternating voltage on the accumulator connecting line.Ac current signal and ac voltage signal are removed DC component through described coupling capacitance, by described operational amplifier signal are amplified, and send into digital to analog converter A/D again after described bandpass filter able to programme is removed undesired signal and become digital signal.CPU control digital to analog converter A/D high-speed sampling 4000～8000 times, and all sampled datas are sent into described CPU carry out digital signal processing, further remove the harmonic interference signal with digital lock-in technique, only keep the effective AC signal identical with setpoint frequency, to guarantee that accumulator is in running order down as floating charge state at the scene, all fill state, the accuracy that strong interference environments such as power failure discharge condition are measured down, CPU further calculates electric current again, the real part of voltage signal, imaginary part, phase place, parameters such as effective value finally draw the resistance of connecting line between the internal resistance of accumulator and accumulator.CPU is in the sampling ac current signal, detect the alternating voltage of every joint accumulator anode and cathode intercolumniation and the alternating voltage on the connecting line between accumulator respectively in the mode of patrolling and examining, through calculating the resistance of every connecting line between the internal resistance finally draw every joint accumulator and accumulator.Group and connecting line resistance are sent into the CPU of online monitor main frame at last and are stored demonstration in the accumulator, and send into monitoring center through monitoring network and further be sent to user terminal again.2, the measurement of every joint accumulator DC pressure: every joint battery tension signal is sent into digital to analog converter A/D and is become digital signal after operational amplifier and low-pass filter processing, CPU control digital to analog converter A/D high-speed sampling 2000～4000 times, and all sampled datas are sent into described CPU carry out digital signal processing, get its mean value and press as accumulator DC.CPU controls multi-way switch, detects the DC voltage of every joint accumulator anode and cathode intercolumniation respectively in the mode of patrolling and examining, and finally draws the DC voltage of every joint accumulator.The DC voltage of accumulator is sent into the CPU of online monitor main frame at last and is stored demonstration, and sends into monitoring center through monitoring network and further be sent to user terminal again.
The effect of the dc charging motor characteristic test unit of on-line monitoring instrument is to measure accumulator battery voltage, charging and discharging currents, environment temperature and the dc charging motor characterisitic parameter such as the precision of voltage regulation, precision of steady current, the ripple voltage coefficient, data such as charging module current-sharing degree of unbalancedness, by host CPU (LPC2468), from CPU (DSP), operational amplifier, digital to analog converter D/A, the high-speed synchronous modulus converter A/D, multi-way switch, low-pass filters etc. are formed .1, the measurement of accumulator battery voltage: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of accumulator battery voltage measuring-signal, subtract each other with the accumulator battery voltage measuring-signal behind attenuator circuit, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal. because accumulator battery voltage measuring-signal and voltage reference signal subtract each other, the enlargement factor of the operational amplifier of back level can be very high, thereby improved the measuring accuracy of accumulator battery voltage measuring-signal. the thousands of values of host CPU control high-speed synchronous modulus converter A/D high-speed sampling, send into from CPU (DSP) and carry out mathematics manipulation, to get after the average as the accumulator battery voltage measured value. the accumulator battery voltage measured value is sent into host CPU again, send into the CPU of online monitor main frame at last and store demonstration, and send into monitoring center through monitoring network and further be sent to user terminal .2 again, the measurement of battery pack charging and discharging currents: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of battery pack charging and discharging currents measuring-signal, subtract each other with the battery pack charging and discharging currents measuring-signal that records through Hall current sensor, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal. because battery pack charging and discharging currents measuring-signal and current reference signal subtract each other, the enlargement factor of the operational amplifier of back level can be very high, thereby having improved the measuring accuracy of battery pack charging and discharging currents measuring-signal. thereby host CPU is by the control multi-way switch enlargement factor of resonance-amplifier automatically. the thousands of values of host CPU control high-speed synchronous modulus converter A/D high-speed sampling, send into from CPU (DSP) and carry out mathematics manipulation, get after the average measured value as battery pack charging and discharging currents measuring-signal. battery pack charging and discharging currents measuring-signal measured value is sent into host CPU again, send into the CPU of online monitor main frame at last and store demonstration, and send into monitoring center through monitoring network and further be sent to user terminal .3 again, the measurement of temperature: the temperature signal that temperature sensor measurement gets becomes digital signal through operational amplifier and modulus converter A/D and sends into host CPU, send into the CPU of online monitor main frame at last and store demonstration, and send into monitoring center through monitoring network and further be sent to user terminal .4 again, the measurement of the charging set precision of voltage regulation: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of measuring voltage, subtract each other with the voltage measurement signal behind attenuator circuit, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal. because voltage measuring value and voltage reference value subtract each other, the enlargement factor of the operational amplifier of back level can be very high, thereby improved the measuring accuracy of voltage signal. the thousands of values of host CPU control high-speed synchronous modulus converter A/D high-speed sampling, send into from CPU and carry out that digital operation is handled and the precision of voltage regulation that calculates charging set. precision of voltage regulation computing method: δ u=(U
M-U
Z)/U
Z* 100%, δ u wherein: the precision of voltage regulation; U
M: the voltage fluctuation ultimate value; U
Z: the voltage setting valve.The precision of voltage regulation of charging set is sent into host CPU again, sends into the CPU of online monitor main frame at last and stores demonstration, and send into monitoring center through monitoring network and further be sent to user terminal again.5, the measurement of charging set precision of steady current: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of charging set current measurement signal, subtract each other with the charging set current measurement signal behind attenuator circuit, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal.Because charging set current measurement signal and current reference value are subtracted each other, the enlargement factor of the operational amplifier of back level can be very high, thereby improved the measuring accuracy of charging set current signal.Thereby host CPU is by the enlargement factor of the automatic resonance-amplifier of control multi-way switch.The thousands of values of host CPU control high-speed synchronous modulus converter A/D high-speed sampling are sent into from CPU and are carried out that digital operation is handled and the precision of steady current that calculates charging set.Precision of steady current computing method: δ i=(I
M-I
Z)/I
Z* 100%, δ i wherein: precision of steady current; I
M: the current fluctuation ultimate value; I
Z: current setting.The precision of steady current of charging set is sent into host CPU again, sends into the CPU of online monitor main frame at last and stores demonstration, and send into monitoring center through monitoring network and further be sent to user terminal again.6, the measurement of charging set ripple voltage coefficient: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of measuring voltage, subtract each other with the voltage measurement signal behind attenuator circuit, amplify through amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal.Because voltage measuring value and voltage reference value subtract each other, the enlargement factor of the operational amplifier of back level can be very high, thereby improved the measuring accuracy of voltage signal.Thereby host CPU is by the enlargement factor of the automatic resonance-amplifier of control multi-way switch.The thousands of values of host CPU control high-speed synchronous modulus converter A/D high-speed sampling are sent into from CPU and are carried out that digital operation is handled and the ripple voltage coefficient that calculates charging set.Ripple voltage coefficient calculations method: δ pp=Upp/Udc/2 * 100%, wherein δ pp: ripple voltage coefficient; Upp: ripple voltage peak one peak value; Udc: dc voltage average value.The ripple voltage coefficient of charging set is sent into host CPU again, sends into the CPU of online monitor main frame at last and stores demonstration, and send into monitoring center through monitoring network and further be sent to user terminal again.7, the measurement of charging module current-sharing degree of unbalancedness: Hall current sensor measure current signal become digital signal through operational amplifier and modulus converter A/D and send into host CPU.Host CPU control multi-way switch can No. 1 output current to No. 8 charging modules of sequence detection, the computing method of charging module current-sharing degree of unbalancedness: β=[(I-I
P)/I
N] * 100%, β in the formula: current-sharing degree of unbalancedness; I: the ultimate value of actual measurement module output current; I
P: the mean value of N operational module output current; I
N: the load current value of module.After host CPU calculates charging module current-sharing degree of unbalancedness, send into the CPU of online monitor main frame and store demonstration, and send into monitoring center through monitoring network and further be sent to user terminal again.
Described dc charging motor characteristic test unit is provided with the current trigger threshold values, can judge and note charging set _ battery pack exactly and change constant current pressure limiting charged state → voltage automatically over to reach to change over to automatically after the setting value and be transferred to the so complete charge and discharge cycles process of normal floating charge state when modified constant-voltage charge state → electric current is reduced to setting value automatically after normal floating charge state → generation has a power failure back battery discharging state → incoming call.And calculate the precision of voltage regulation, the ripple voltage coefficient of charging set under floating charge duty, constant voltage and current limiting duty; Calculate precision of steady current, the charging module current-sharing degree of unbalancedness of charging set under constant current pressure limiting duty, and send these charging set performance index to host CPU.Send into the CPU of online monitor main frame at last and store demonstration, and send into monitoring center through monitoring network and further be sent to user terminal again.
The memory cell of described on-line monitoring instrument is SRAM, FLASH, EEPROM, can store Monitoring Data.The communication unit of described on-line monitoring instrument is RS232/485, LAN and USB, can communicate with computer equipment, realizes on-line monitoring and file administration to accumulator and charging set.The input-output unit of described on-line monitoring instrument is LCD, button, printer etc., realizes the demonstration of Monitoring Data and the modification of monitoring parameter.
Direct supply of the present invention and accumulator on-line monitoring system, adopt Technology of Precision Measurement, signal analysis and processing technology, network technology and database management technology, to parameters such as the monomer internal resistance of accumulator, monomer voltage, connection resistances, accumulator battery voltage, charging and discharging currents, temperature, characterisitic parameters such as the charging set precision of voltage regulation, precision of steady current, ripple voltage coefficient, charging module current-sharing degree of unbalancedness are carried out on-line monitoring.Compare with traditional accumulator detection mode, have tangible advantage:
1, with the subsystem of battery pack, taken into full account of the influence of charging set characteristic, made a new step has been gone up in the monitoring and the management of accumulator, thereby improved the security and the reliability of total system accumulator as straight-flow system.
2, monitor the state of each joint accumulator in real time, find the accumulator of the backwardness in several ten thousand accumulators at any time and send warning at once, remind the maintenance management personnel in time to handle, guarantee the safety of electric power system.
3, to misoperation situation auto-real-time monitoring records such as system blackout discharge, incoming call chargings.
4, discharge instrument is controlled, need not manually be carried out taking out stitches and frequent detection record work of complicated wiring, finish whole nuclear discharge capacitor process automatically, and produced nucleus holds form automatically.
5, monitor parameters such as battery current, voltage, internal resistance, temperature in real time, when abnormal conditions took place, system reported to the police automatically, and the prompting maintenance management personnel in time handle, and prevents the generation of accident, ensures the safe operation of electric system.
6, each joint accumulator is all set up lifelong archives, and at any time archives have been upgraded, realized modern management, scientific management, fine-grained management.
7, human and material resources and financial resources have been saved.
The application of direct supply and accumulator on-line monitoring system is very extensive, can be applied to the on-line monitoring and the assessment of industry field backup power systems such as electric power, communication, government bodies, finance, security, insurance, radio and television, communications and transportation, manufacturing, army, education, scientific research, communal facility.
The foregoing description only is explanation technical conceive of the present invention and characteristics; its purpose is to allow the personage that is familiar with this technology can understand content of the present invention and is implemented; can not limit protection scope of the present invention with this; all equivalences that spirit is done according to the present invention change or modify, and all should be encompassed in protection scope of the present invention.
Claims (10)
1. direct supply and accumulator on-line monitoring system, described system is made up of on-line monitoring instrument, monitoring center, user terminal, monitoring network, supervising the network; Described on-line monitoring instrument is made up of CPU, battery tension internal resistance test cell, dc charging motor characteristic test unit, power supply unit, communication unit, input-output unit, fault alarm unit, reset unit, memory cell, realizes being sent to described monitoring center to the on-line monitoring of on-the-spot accumulator and dc charging motor and with Monitoring Data by described monitoring network; Described monitoring center is a large server, receives the Monitoring Data that described on-line monitoring instrument transmits, and with the large database form Monitoring Data is carried out storage management; Respond the various command of described user terminal; Accept the order of described user terminal and carry out various controls being installed on on-the-spot described on-line monitoring instrument.
2. direct supply according to claim 1 and accumulator on-line monitoring system is characterized in that: described battery tension internal resistance test cell is made up of CPU, high-power MOS tube, coupling capacitance, operational amplifier, multi-way switch, bandpass filter able to programme, low-pass filter, modulus converter A/D, digital to analog converter D/A etc.; High-power MOS tube is connected on battery discharging and detects in the loop, makes battery discharging to produce the sine wave AC exciting current signal of setpoint frequency by CPU control high-power MOS tube, induces corresponding ac voltage signal on the accumulator anode and cathode post; In the time of CPU control modulus converter A/D sampling ac current signal, also control the alternating voltage of multi-way switch and digital to analog converter A/D sampling accumulator anode and cathode intercolumniation; Ac current signal and ac voltage signal are removed DC component through described coupling capacitance, by described operational amplifier signal are amplified, and send into digital to analog converter A/D again after described bandpass filter able to programme is removed undesired signal and become digital signal; CPU control digital to analog converter A/D high-speed sampling, and all sampled datas are sent into described CPU carry out digital signal processing, CPU further calculates parameters such as the real part, imaginary part, phase place, effective value of electric current, voltage signal, the internal resistance that finally draws accumulator again.
3. direct supply according to claim 1 and accumulator on-line monitoring system is characterized in that: described battery tension internal resistance test cell is made up of CPU, high-power MOS tube, coupling capacitance, operational amplifier, multi-way switch, bandpass filter able to programme, low-pass filter, modulus converter A/D, digital to analog converter D/A etc.; High-power MOS tube is connected on battery discharging and detects in the loop, makes battery discharging to produce the sine wave AC exciting current signal of setpoint frequency by CPU control high-power MOS tube, also induces corresponding ac voltage signal on the line between accumulator; In the time of CPU control modulus converter A/D sampling ac current signal, also control the alternating voltage on the line between multi-way switch and digital to analog converter A/D sampling accumulator; Ac current signal and ac voltage signal are removed DC component through described coupling capacitance, by described operational amplifier signal are amplified, and send into digital to analog converter A/D again after described bandpass filter able to programme is removed undesired signal and become digital signal; CPU control digital to analog converter A/D high-speed sampling, and all sampled datas are sent into described CPU carry out digital signal processing, CPU further calculates parameters such as the real part, imaginary part, phase place, effective value of electric current, voltage signal again, finally draws the connection resistances between accumulator.
4. according to claim 2 or described direct supply of claim 3 and accumulator on-line monitoring system, it is characterized in that: the voltage signal of every joint accumulator amplifies through operational amplifier, remove undesired signal through low-pass filter, become digital signal through modulus converter A/D again, send into CPU afterwards, measure the voltage (DC component) of every joint accumulator.
5. according to claim 2 and described direct supply of claim 3 and accumulator on-line monitoring system, it is characterized in that: control described multi-way switch by CPU, can the sequence detection battery pack in internal resistance, the connection resistances between accumulator, the battery tension of every joint accumulator; Adopt the alternating current discharge method to measure the internal resistance of accumulator and the connection resistances between accumulator, the measuring-signal frequency can be avoided charging set ripple frequency and other undesired signal frequencies, be not subjected to the influence of direct current signal, can be implemented in internal resistance, voltage, and the connection resistances of on-line monitoring accumulator in the accumulator charging/discharging process; Adopted bandpass filter able to programme that current signal and voltage signal are carried out filtering, to adapt to the processing of different measuring frequency interfering signal.
6. direct supply according to claim 1 and accumulator on-line monitoring system is characterized in that: described dc charging motor characteristic test unit is by host CPU, form from CPU, operational amplifier, digital to analog converter D/A, high-speed synchronous modulus converter A/D, multi-way switch, low-pass filter etc.; Described host CPU is the LPC2468 chip, finishes functions such as control, demonstration, communication; Described is dsp chip from CPU, receives the digital signal that the high-speed synchronous analog to digital converter sends, and carries out high-speed data computing and processing; Described high-speed synchronous analog to digital converter has adopted a slice THS1206 high-speed synchronous modulus converter A/D, and precision is 12, and sampling rate is 6MSPS, can support the high-speed synchronous sampling of 4 road signals.
7. according to claim 1 and described direct supply of claim 6 and accumulator on-line monitoring system, it is characterized in that: the measurement of accumulator battery voltage: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of accumulator battery voltage measuring-signal, subtract each other with the accumulator battery voltage measuring-signal behind attenuator circuit, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal; The thousands of values of host CPU control high-speed synchronous modulus converter A/D high-speed sampling are sent into from CPU (DSP) and are carried out mathematics manipulation, get after the average as the accumulator battery voltage measured value; The measurement of battery pack charging and discharging currents: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of battery pack charging and discharging currents measuring-signal, subtract each other with the battery pack charging and discharging currents measuring-signal that records through Hall current sensor, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal; Thereby host CPU is by the enlargement factor of the automatic resonance-amplifier of control multi-way switch; The thousands of values of host CPU control high-speed synchronous modulus converter A/D high-speed sampling are sent into from CPU (DSP) and are carried out mathematics manipulation, get after the average measured value as battery pack charging and discharging currents measuring-signal.
8. according to claim 1 and described direct supply of claim 6 and accumulator on-line monitoring system, it is characterized in that: the measurement of the charging set precision of voltage regulation: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of measuring voltage, subtract each other with the voltage measurement signal behind attenuator circuit, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal; Host CPU control high-speed synchronous modulus converter A/D high-speed sampling is sent into from CPU and is carried out that digital operation is handled and the precision of voltage regulation that calculates charging set; The measurement of charging set precision of steady current: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of charging set current measurement signal, subtract each other with the charging set current measurement signal behind attenuator circuit, amplify through low-pass filtering and amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal; Host CPU control high-speed synchronous modulus converter A/D high-speed sampling is sent into from CPU and is carried out that digital operation is handled and the precision of steady current that calculates charging set; The measurement of charging set ripple voltage coefficient: host CPU is controlled reference signal of digital to analog converter D/A input automatically according to the size of measuring voltage, subtract each other with the voltage measurement signal behind attenuator circuit, amplify through amplifier again, send into the high-speed synchronous modulus converter A/D and become digital signal; Thereby host CPU is by the enlargement factor of the automatic resonance-amplifier of control multi-way switch; Host CPU control high-speed synchronous modulus converter A/D high-speed sampling is sent into from CPU and is carried out that digital operation is handled and the ripple voltage coefficient that calculates charging set; The measurement of charging module current-sharing degree of unbalancedness: Hall current sensor measure current signal become digital signal through operational amplifier and modulus converter A/D and send into host CPU; Host CPU control multi-way switch can No. 1 output current to No. 8 charging modules of sequence detection, the computing method of charging module current-sharing degree of unbalancedness: β=[(I-I
P)/I
N] * 100%, β in the formula: current-sharing degree of unbalancedness; I: the ultimate value of actual measurement module output current; I
P: the mean value of N operational module output current; I
NThe load current value of-module.
9. according to claim 1 and described direct supply of claim 6 and accumulator on-line monitoring system, it is characterized in that: described dc charging motor characteristic test unit is provided with the current trigger threshold values, judge exactly and note the charging set battery pack after normal floating charge state → generation has a power failure back battery discharging state → incoming call, to change constant current pressure limiting charged state → voltage automatically over to and reach to change over to automatically after the setting value and be transferred to the so complete charge and discharge cycles process of normal floating charge state when modified constant-voltage charge state → electric current is reduced to setting value automatically, and calculate charging set in the floating charge duty, the precision of voltage regulation under the constant voltage and current limiting duty, the ripple voltage coefficient; Calculate precision of steady current and the charging module current-sharing degree of unbalancedness of charging set under constant current pressure limiting duty, and send these charging set performance index to host CPU.
10. direct supply according to claim 1 and accumulator on-line monitoring system, it is characterized in that: described communication unit comprises RS232, RS485, USB, LAN interface, can form monitoring network, and can communicate with other equipment such as discharge instrument, finish the property checked volume test to battery pack, intactly write down the variation of accumulator battery current, accumulator battery voltage, every joint battery tension in charge and discharge process, and produced nucleus holds form; Described reset unit is used for resetting to the on-line monitoring instrument; Described memory cell is SRAM, FLASH, EEPROM, can store test data; Described input-output unit is LCD, button, printer etc., realizes the demonstration of measurement data and the modification of measuring order parameter; Monitoring center receives the field monitoring data that online monitor transmits in real time by monitoring network, store and record with the form of database, and based on this database, regularly or according to operator command, generate accumulator nuclear and hold query statistic form under form, accumulator and charging set monthly magazine annual report, the different query composition statistical condition etc.
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| CN111965557A (en) * | 2020-08-21 | 2020-11-20 | 浙江华电器材检测研究所有限公司 | Backup power reliability assessment method and device |
| CN112164833A (en) * | 2020-09-28 | 2021-01-01 | 珠海市科宏电子科技有限公司 | Storage battery online monitoring management system with data model |
| CN113466729A (en) * | 2021-06-22 | 2021-10-01 | 盛德东南(福建)新能源科技有限公司 | Insulation resistance detection method and system for lithium ion power storage battery |
| CN115420940A (en) * | 2022-11-04 | 2022-12-02 | 山东恒美电子科技有限公司 | Direct current signal detecting system of multipurpose |
| CN116525978A (en) * | 2023-07-03 | 2023-08-01 | 北京恩天科技发展有限公司 | Online detection, sensing and maintenance system for storage battery |
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