CN2798109Y - Automatic DC power tester - Google Patents
Automatic DC power tester Download PDFInfo
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- CN2798109Y CN2798109Y CN 200520000564 CN200520000564U CN2798109Y CN 2798109 Y CN2798109 Y CN 2798109Y CN 200520000564 CN200520000564 CN 200520000564 CN 200520000564 U CN200520000564 U CN 200520000564U CN 2798109 Y CN2798109 Y CN 2798109Y
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Abstract
The utility model relates to an automatic detecting device for a direct current power supply, which is used for detecting and controlling the working condition of the direct current power supply under various loading conditions. The automatic detecting device comprises a zoom type timer, a current detecting and overcurrent protective device, a voltage detecting and overvoltage protective device, and an overload protective device. The zoom type timer is used for setting time cycle to circularly carry out the automatic detection of the working condition of the direct current power supply. The current detecting and overcurrent protective device is used for comparing the reference position and the measuring current, and the working circuit is closed at the abnormal time in order to benefit the over-current protection of the direct current power source device and the relevant work system. The voltage detecting and overvoltage protective device is used for comparing reference voltage and measuring voltage, and the working circuit is closed at the abnormal time in order to benefit the overvoltage protection of the direct current power supply device and the relevant work system. The overload protective device is used for comparing reference position and measuring voltage, and the working circuit is closed at the abnormal time in order to benefit the overload protection of the direct current power supply and the relevant work system.
Description
Technical field
The utility model relates to a kind of direct supply detection, demonstration, holding circuit, particularly a kind of direct supply automatic detection device that is suitable under several given load condition.
Background technology
Continuous-current plant is used various in industrial and life; energy conversion between alternating electromotive force supply system and continuous-current plant is used very wide; wherein for to prevent that the overload condition of direct supply from causing systemic breakdown; the detection holding circuit of direct supply develops for a long time, need do the optimization adjustment yet the same detection is protected under the different DC power system duties.The utility model is specially for solving in vehicle power supply device because of having forgotten to close load, and generator is unusual, the overvoltage that traffic accident or short circuit caused, overcurrent, overload condition; For the power supply on vehicle protection provides better choice.
Summary of the invention
Fundamental purpose of the present utility model provides a kind of direct supply automatic detection device, is used for detecting automatically the working condition of direct supply under the various loading conditions, and the display system state, in order to avoiding the system failure.
Another order of the present utility model provides a kind of adjustable timer, so that setting-up time carries out the automatic detection of direct supply working condition with loop cycle.
Above-mentioned purpose of the present utility model is to realize like this, a kind of circuit protection device that comprises is to carry out the direct supply automatic detection device of over-voltage and over-current and overload protection, comprise the direct supply detection display device that detects and show the working condition of direct supply, it is characterized in that this direct supply detects display device and comprises; Generation one can be adjusted the adjustable timing circuit of test period; Carry out the electronic type commutation circuit that load and show state switch; Several load devices that comprise display device and pull-up resistor respectively; The voltage signal pick-up unit; The current signal pick-up unit; Over-pressure safety device; Overcurrent protective device; Wherein:
Described adjustable timing circuit, over-pressure safety device and overcurrent protective device are connected described electronic type commutation circuit respectively;
The current signal pick-up unit connects and controls a load and select circuit;
Described several load devices select circuit to connect load voltage via described load respectively.
The utlity model has following technique effect:
1, voltage detecting and over-pressure safety device show when unusual or close operating circuit, in order to overvoltage (over voltage) protection or low-voltage (low voltage) protection of continuous-current plant and related work system;
2, current detecting and overcurrent protective device are closed operating circuit when unusual, in order to overcurrent (over current) protection of continuous-current plant and related work system;
Below in conjunction with accompanying drawing the utility model is elaborated.
Description of drawings
Fig. 1 is the circuit diagram of the utility model preferred embodiment;
Fig. 2 is a process block diagram of the present utility model;
Fig. 3 is a logical flow chart of the present utility model.
Description of reference numerals: 10 timing loops; 101 times produced circuit; 102 counter circuits; 103 timing loop AND logic gates; 20 function circuits; 201 function circuit AND logic gates; 30 voltage detecting and electric voltage exception holding circuit; 301 voltage detecting circuits; 302 electric voltage exception holding circuits; 303 overvoltage exclusive circuits; 304 low-voltage lockout circuit; 40 current detecting and current foldback circuit; 401 current detection circuits; 402 current amplification circuits; 403 current comparison circuits; 4031 first order current comparison circuits; 4032 second level current comparison circuits; 404 current foldback circuits; Circuit is selected in 405 loads; 50 these load corresponding circuits; The corresponding comparer of 501 first order loads; The corresponding comparer of 502 second level loads; The corresponding comparer of 503 third level loads; 60 reference voltage circuits; 601 mu balanced circuits; LED1 overvoltage signal lamp; LED2-battery failures signal lamp.
Embodiment
The dc-battery power supply that sees also the utility model preferred embodiment shown in Figure 1 detects and shows the protection synoptic diagram, and as shown in the figure, timing loop 10 comprises that the time produces circuit 101, a counter circuit 102, an AND logic gate 103.
Its electrical connection is as follows: this time produces circuit 101 and produces the immobilizing foundation time, and the output terminal of this time generation circuit 101 is coupled to the counting input end of counter circuit 102.The output terminal of this counter circuit 102 is coupled to an input end of this AND logic gate 103.In the present embodiment, for making the easier design of whole device, can produce the immobilizing foundation time T that circuit 101 produces the time ' be the basis, cooperate this counter circuit 102 to produce an adjustable test period T=nT ' to cooperate the device demand under the different operating condition.
Under such design, when T=nT ', an AND logic gate 201 is used for the device switch and switches.The input end of this AND logic gate 201 is electrically connected with the output terminal of current detecting with the current foldback circuit 404 of current foldback circuit 40 with the output terminal of the overvoltage crowbar 302 of overvoltage crowbar 30 with voltage detecting with AND logic gate 103 respectively.Form operation circuit.After this function circuit obtained the input signal in self clock loop 100 via the electric connection point with AND logic gate 103, promptly conducting device began to test.
This voltage detecting and electric voltage exception holding circuit 30 comprise a voltage detecting circuit 301, an electric voltage exception holding circuit 302, an overvoltage exclusive circuit 303, a low-voltage lockout circuit 304.This voltage detecting circuit 301 is used for detecting and comparing load voltage, and the load that the input end of this voltage detecting circuit 301 is connected with direct supply respectively is connected with the output terminal of the mu balanced circuit 601 of reference voltage circuit 60.This electric voltage exception holding circuit 302 is used for detecting and the protection direct supply, and the input end of this electric voltage exception holding circuit 302 is connected with the output terminal of direct voltage source with the mu balanced circuit 601 of reference voltage circuit 60 respectively.
This voltage detecting circuit 301 compares the current potential of load voltage and reference voltage Vref; when its fiducial value overflows standard; transmit a caution signal (Warning Signal) to this overvoltage exclusive circuit 303; overvoltage this moment signal lamp LED1 lights; this overvoltage exclusive circuit 303 cut-off systems running is with the protection load and transmit the AND logic gate 201 of a pick-off signal (Cut-Off Signal) to function circuit 20, and the cutoff test program also enters the power supply discharge mode to avoid the battery damage.
This electric voltage exception holding circuit 302 compares the current potential of load voltage and reference voltage Vref; when its fiducial value is lower than standard; transmit the AND logic gate 201 of a pick-off signal (Cut-Off Signal) to function circuit 20, cutoff test program or direct discharge mode are to avoid the battery damage.
This voltage detecting circuit 301 can be an OP amplifier, and this overvoltage crowbar 302 also can be an OP amplifier, but voltage detecting circuit 301 not only is the OP amplifier with overvoltage crowbar 302, also can be all kinds of differential circuits that voltage ratio is amplified that can be used for.Should end can be a 4013IC, but this locking not only is a 4013IC with circuit 303, also can be all kinds of circuit that can be used for system's locking (Latch) with circuit 303.
This current detecting and current foldback circuit 40 comprise a current detection circuit 401, a current amplification circuit 402, a current comparison circuit 403, and this current comparison circuit also comprises first order current comparison circuit 4031, second level current comparison circuit 4032, a current anomaly protective circuit 404, a selection circuit 405.The input end of this current detection circuit 401 is connected with direct supply, and output terminal connects the input end of current amplification circuit 402.The input end of this current amplification circuit 402 is connected with the output terminal of current detection circuit 401, and output terminal connects current comparison circuit 403.The input end of the first order current comparison circuit 4031 of this current comparison circuit 403 is connected with the output terminal of current amplification circuit 402, and output terminal is connected with the input end of this selection circuit 405.The input end of the second level current comparison circuit 4032 of this current comparison circuit 403 is connected with the output terminal of this current amplification circuit 402, and the output terminal of the second level current comparison circuit 4032 of this current comparison circuit 403 is connected with the input control end of this selection circuit 405.The input end of this current foldback circuit 404 is connected with the input end of this current amplification circuit 402, and the output terminal of this current foldback circuit 404 is connected in an end of this logic gate 201.This selects the input control end of circuit 405 to be connected with current comparison circuit 4031 output terminals.This selects circuit 405 input control ends to be connected with the output terminal of current comparison circuit 4032.These selector switch 405 input ends are connected load with direct supply terminal voltage connects.The output of this selector switch 405 according to the signal of input end, has three kinds of corresponding comparator circuit 501,502,503 couplings with different loads of output respectively.
This current detection circuit 401 is in order to obtain the power supply signal of direct supply; by coil-induced current signal is converted to voltage signal; its conversion proportion is by once survey, the decision of secondary test coil; and reach the circuit isolation effect by stream voltage transitions mechanism; can avoid control circuit to be subjected to the interference of power circuit overload, reach the purpose of conversion of signals and circuit protection simultaneously.These current amplification circuit 402 linear amplification compare and classification in order to 403 pairs of signals of this current comparison circuit, and reduce output impedance simultaneously from the detection signal of this current detection circuit 401, to increase energy transmission efficiency.One current comparison circuit 403 comprises first order current comparison circuit 4031, second level current comparison circuit 4032, is used for the current levels analysis, and cooperates this load to select the suitable load size of circuit 405 decisions to correspond to relative alternative route.It is a current potential sorting circuit that circuit 405 is selected in this load, is used for the voltage potential classification from this current comparison circuit 403, and selects signal is inserted in the load corresponding circuits 50.
This current detection circuit 401 can be a Hall current inductor (Hall Sensor), but this current detection circuit 401 not only is a Hall current inductor (Hall Sensor), also can be all kinds of change-over circuits that can be used for current/voltage.This current amplification circuit 402, this current comparison circuit 403 comprise first order current comparison circuit 4031, second level current comparison circuit 4032, a current foldback circuit 404; all can be an OP amplifier; but not only be the OP amplifier, also can be all kinds of differential circuits that voltage ratio is amplified that can be used for.This load selects circuit 405 to can be a 4051IC, but this load selection circuit 405 not only is a 4051IC, also can be all kinds of circuit that can be used for current levels, and in the truth table of 4051IC, size of current has following classification:
1, electric current does not reach 10 ampere-hours, is considered as no-load;
2, electric current reaches 10 amperes, does not reach 20 ampere-hours, is considered as first order load;
3, electric current reaches 20 amperes, does not reach 30 ampere-hours, is considered as second level load;
4, electric current reaches 30 amperes, does not reach 50 ampere-hours, is considered as third level load;
5, electric current surpasses 50 ampere-hours, and battery failures signal lamp LED2 lights;
This load corresponding circuits 50 comprises the corresponding comparer 501 of first order load, the corresponding comparer 502 of second level load, the corresponding comparer 503 of third level load.Loads wherein at different levels all comprise one group of above display circuit and pull-up resistor, when load condition not simultaneously, compare this selections circuit 405, contrast above-mentioned current status to determine corresponding circuits.When deliver to the corresponding comparer 501,502,503 of load a period of time wherein corresponding to the voltage signal of relatively load, if there is load voltage to be lower than being as the criterion of reference voltage, then corresponding comparer send a caution signal to the low-voltage lockout loop 304 this moment battery failures signal lamp LED2 light.
Reference voltage circuit 60 comprises a mu balanced circuit 601, is used to provide the system stability reference voltage Vref.
Claims (6)
1, a kind of circuit protection device that comprises is to carry out the direct supply automatic detection device of over-voltage and over-current and overload protection, comprise the direct supply detection display device that detects and show the working condition of direct supply, it is characterized in that this direct supply detects display device and comprises: generation one can be adjusted the adjustable timing circuit of test period; Carry out the electronic type commutation circuit that load and show state switch; Several load devices that comprise display device and pull-up resistor respectively; The voltage signal pick-up unit; The current signal pick-up unit; Over-pressure safety device; Overcurrent protective device; Wherein:
Described adjustable timing circuit, over-pressure safety device and overcurrent protective device are connected described electronic type commutation circuit respectively;
The current signal pick-up unit connects and controls a load and select circuit;
Described several load devices select circuit to connect load voltage via described load respectively.
2, direct supply automatic detection device as claimed in claim 1 is characterized in that, direct supply is a battery system.
3, direct supply automatic detection device as claimed in claim 1 is characterized in that, direct supply is the Vehicular battery system.
4, direct supply automatic detection device as claimed in claim 1 is characterized in that, load is the passive load system.
5, direct supply automatic detection device as claimed in claim 2 is characterized in that, load is the passive load system.
6, direct supply automatic detection device as claimed in claim 3 is characterized in that, load is the passive load system.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520000564 CN2798109Y (en) | 2005-01-12 | 2005-01-12 | Automatic DC power tester |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200520000564 CN2798109Y (en) | 2005-01-12 | 2005-01-12 | Automatic DC power tester |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN2798109Y true CN2798109Y (en) | 2006-07-19 |
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN 200520000564 Expired - Fee Related CN2798109Y (en) | 2005-01-12 | 2005-01-12 | Automatic DC power tester |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN2798109Y (en) |
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394435B (en) * | 2008-11-12 | 2011-05-25 | 闻泰集团有限公司 | Device for automatically detecting over-voltage protection of mobile phone |
| TWI397246B (en) * | 2009-11-06 | 2013-05-21 | Analog Vision Technology Inc | Protection circuit with latch control |
| CN103257580A (en) * | 2013-03-29 | 2013-08-21 | 国家电网公司 | Overload limit simulation device |
| CN101598771B (en) * | 2009-06-22 | 2013-08-21 | 艾默生网络能源有限公司 | Devices and method for detecting output over-voltage protection point of power supply module |
| CN103323788A (en) * | 2012-03-22 | 2013-09-25 | 鸿富锦精密工业(武汉)有限公司 | Power source testing system |
| CN106033937A (en) * | 2015-03-12 | 2016-10-19 | 钜泉光电科技(上海)股份有限公司 | Adaptive power control system for dynamic power supply |
-
2005
- 2005-01-12 CN CN 200520000564 patent/CN2798109Y/en not_active Expired - Fee Related
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101394435B (en) * | 2008-11-12 | 2011-05-25 | 闻泰集团有限公司 | Device for automatically detecting over-voltage protection of mobile phone |
| CN101598771B (en) * | 2009-06-22 | 2013-08-21 | 艾默生网络能源有限公司 | Devices and method for detecting output over-voltage protection point of power supply module |
| TWI397246B (en) * | 2009-11-06 | 2013-05-21 | Analog Vision Technology Inc | Protection circuit with latch control |
| CN103323788A (en) * | 2012-03-22 | 2013-09-25 | 鸿富锦精密工业(武汉)有限公司 | Power source testing system |
| CN103257580A (en) * | 2013-03-29 | 2013-08-21 | 国家电网公司 | Overload limit simulation device |
| CN103257580B (en) * | 2013-03-29 | 2015-07-01 | 国家电网公司 | Overload limit simulation device |
| CN106033937A (en) * | 2015-03-12 | 2016-10-19 | 钜泉光电科技(上海)股份有限公司 | Adaptive power control system for dynamic power supply |
| CN106033937B (en) * | 2015-03-12 | 2019-02-01 | 钜泉光电科技(上海)股份有限公司 | A kind of optimal energy allocation system suitable for dynamic power supplies |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C17 | Cessation of patent right | ||
| CF01 | Termination of patent right due to non-payment of annual fee |
Granted publication date: 20060719 |