CN103390884A - Power source detection control device and power supply control system - Google Patents
Power source detection control device and power supply control system Download PDFInfo
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- CN103390884A CN103390884A CN2013103110013A CN201310311001A CN103390884A CN 103390884 A CN103390884 A CN 103390884A CN 2013103110013 A CN2013103110013 A CN 2013103110013A CN 201310311001 A CN201310311001 A CN 201310311001A CN 103390884 A CN103390884 A CN 103390884A
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Abstract
The invention discloses a power source detection control device which comprises a power source input port, a power supply output port, a signal detection circuit, a singlechip and a display unit, wherein the power source input port is used for accessing an external voltage-stabilized power source signal; the power supply output port is used for being connected with an external power utilization device, is in a conducting state at a switch, accesses the external voltage-stabilized power source signal, and supplies power to the external power utilization device; the signal detection circuit is used for accessing a to-be-detected signal of the external power utilization device; the singlechip is used for judging whether the to-be-detected signal of the external power utilization device is normal, and when the to-be-detected signal is normal, the switch is controlled to be connected; when the to-be-detected signal is abnormal, the switch is controlled to be disconnected; and the display unit is used for outputting and displaying a result of detection performed by the singlechip on the external utilization device. The invention further provides a power supply control system, real-time monitoring of a working state of the power utilization device is realized, the system can supply power to the power utilization device according to the detection result, and flexible power supply protection can be performed on the power utilization device.
Description
Technical field
The present invention relates to electronic technology field, relate in particular to a kind of power supply detection control apparatus and electric power supply control system.
Background technology
In today of electronic technology develop rapidly, daily life has be unable to do without various electronic products with work.Along with the development of integrated electronic circuit, the raising of making technology (as the fineness of integrated circuit, production technology etc.), the integrated level of various electronic product equipments is more and more higher, and its function is also more and more abundanter.In the production process of various electronic product equipments, need to test its circuit main board circuit, test passes just can put goods on the market and sells and use.
when electronic equipment being tested or normally uses, need to power to this electronic equipment, the electronic equipment of some high-performance high primary frequencies need to provide a plurality of different operating voltages usually, as high definition (High Definition) set-top box, and the common power consumption of these electronic products is larger, especially in the product test process, requirement to power supply is very strict, if power supply can not meet actual requirement to the electrifying timing sequence of electronic equipment, or the output voltage of power supply does not meet standard, as reverse power connection, the load excess load, circuit performance is poor etc., will cause these electronic equipments or device the system failure occurs and quit work, even burn electronic device and circuit on its internal circuit mainboard, as chip etc.
Summary of the invention
Technical problem to be solved by this invention is; a kind of power supply detection control apparatus and electric power supply control system are provided; can detect in real time by the operating state to power device; and control stabilized voltage power supply according to testing result this power device is powered, to realize the power supply protection to power device.
For solving above technical problem, on the one hand, the invention provides a kind of power supply detection control apparatus, comprising: power input mouth, derailing switch, power supply output port, single-chip microcomputer, Multi-path signal detecting circuit and display unit;
Described power input mouth, be used for access external stabilized power signal;
Described power supply output port, be used for connecting outside power device, and when described derailing switch is in conducting state,, by with described power input mouth, being connected, accessing described external stabilized power signal described outside power device is powered;
Described signal deteching circuit, be used for accessing the measured signal of described outside power device, and the measured signal of described outside power device carried out transferring to described single-chip microcomputer after preliminary treatment;
Described single-chip microcomputer, be used for judging whether the measured signal of described outside power device is normal, to obtain testing result; And at described measured signal, while being normal, controlling described derailing switch and be in conducting state; , control described derailing switch and be in off-state while being abnormal at described measured signal;
Described display unit, be used for described single-chip microcomputer is carried out output display to the testing result of described outside power device.
Further, the described signal deteching circuit in each road comprises voltage detecting circuit; Described measured signal comprises voltage signal to be measured;
Described voltage detecting circuit, be used for accessing the voltage signal to be measured of described outside power device, and described voltage signal to be measured carried out transferring to described single-chip microcomputer after voltage division processing.
The described signal deteching circuit in each road also comprises current detection circuit; Described measured signal also comprises current signal to be measured;
Described current detecting electric current, be used for accessing the current signal to be measured of described outside power device, and described current signal to be measured carried out transferring to described single-chip microcomputer after differential amplification.
But in a kind of implementation, described voltage detecting circuit is comprised of the first resistor, the second resistor, the first capacitor, the second capacitor, the first operational amplifier and the first clamp circuit;
One end of described the first resistor is used for accessing voltage signal to be measured, and the other end is connected to the input in the same way of described the first operational amplifier, and described voltage signal to be measured is carried out dividing potential drop;
After described the second resistor and described the first Parallel-connected Capacitor, an end is connected to the in-phase input end of described the first operational amplifier, and other end ground connection is used for the voltage signal described to be measured of access is carried out filtering;
One end of described the second capacitor is connected to the positive supply input of described the first operational amplifier, and the other end connects ground; The reverse input end of described the first operational amplifier is connected with the output of described the first operational amplifier, forms voltage follower;
The output of described the first operational amplifier is connected with described single-chip microcomputer, is used for carrying out voltage signal described to be measured after dividing potential drop and transfers to described single-chip microcomputer and detect;
Described the first clamp circuit is comprised of the series circuit of the first diode and the second diode, wherein, the negative pole of the positive pole of described the first diode and described the second diode is connected to the output of described the first operational amplifier jointly, is used for the voltage signal of described the first operational amplifier output is limited.
In a kind of attainable mode, described current detection circuit is comprised of the 3rd resistor, the 4th resistor, the 5th resistor, the 6th resistor, the second operational amplifier and the second clamp circuit;
Described the 3rd resistor and described the 4th resistor are connected to the reverse input end of described the second operational amplifier and input in the same way, are used for current signal difference to be measured is inputed to described the second operational amplifier;
One end of described the 5th resistor is connected to the in-phase input end of described the second operational amplifier, other end ground connection; One end of described the 6th resistor is connected to the reverse input end of described the second operational amplifier, and the other end is connected to the output of described the second operational amplifier;
The output of described the second operational amplifier is connected with described single-chip microcomputer, and current signal transfer described to be measured to the described single-chip microcomputer that is used for carrying out after differential amplification detects;
Described the second clamp circuit is comprised of the series circuit of the 3rd diode and the 4th diode, wherein, the negative pole of the positive pole of described the 3rd diode and described the 4th diode is connected to the output of described the second operational amplifier jointly, is used for the voltage signal of described the second operational amplifier output is limited.
On the other hand, the present invention also provides a kind of electric power supply control system, and described system comprises: stabilized voltage power supply, power supply detection control apparatus, power device and computer.
Described stabilized voltage power supply is used for by described power supply detection control apparatus, described power device being powered;
Described power supply detection control apparatus is the described power supply detection control apparatus of above any one, is used for the operating state of described power device is detected; And when described power device being detected and break down, disconnect being electrically connected to of described stabilized voltage power supply and described power device, and fault message is carried out output display;
Described computer is used for described power supply detection control apparatus is carried out the parameter setting, and is used for carrying out transfer of data by described power supply detection control apparatus and described power device.
Preferably, described power device is set-top box.
The technical scheme that the embodiment of the present invention provides, stabilized voltage power supply is powered to power device by the derailing switch of power supply detection control apparatus inside, by the power supply detection control apparatus is designed, adopt this power supply detection control apparatus to gather power device De Ge road measured signal (voltage signal and/or current signal), analyze and judge whether the operating state of described power device is normal, and at described measured signal while being normal, the control switch device is in conducting state; , control described derailing switch and be in off-state while being abnormal at the measured signal of arbitrary road signal deteching circuit, realize the intelligent power supply to power device; And further testing result is carried out output display, and so that the working condition of the described power device of engineering staff's rapid analysis, the unexpected generation such as prevent that power device from burning.
Description of drawings
Fig. 1 is the structural representation of the first embodiment of a kind of power supply detection control apparatus provided by the invention;
Fig. 2 is the internal structure schematic diagram of the signal deteching circuit that provides of first embodiment of the invention;
Fig. 3 is the circuit theory diagrams of a kind of implementation of the voltage detecting circuit that provides of first embodiment of the invention;
Fig. 4 is the circuit theory diagrams of a kind of implementation of the current detection circuit that provides of first embodiment of the invention;
Fig. 5 is the structural representation of the second embodiment of power supply detection control apparatus provided by the invention;
Fig. 6 is the first serial that provides of second embodiment of the invention and a kind of communication connection circuit theory diagrams of second serial;
Fig. 7 is the structural representation of an embodiment of a kind of electric power supply control system provided by the invention.
Embodiment
Below in conjunction with the accompanying drawing in the embodiment of the present invention, the technical scheme in the embodiment of the present invention is clearly and completely described.
, referring to Fig. 1, be the structural representation of the first embodiment of a kind of power supply detection control apparatus provided by the invention.
In the present embodiment, described power supply detection control apparatus comprises: power input mouth 101, derailing switch 102, power supply output port 103, single-chip microcomputer 104, (signal deteching circuit 1 as shown in Figure 1 for Multi-path signal detecting circuit, signal deteching circuit 2, signal deteching circuit n, wherein n 〉=2) and display unit 105.
Described power input mouth 101, be used for access external stabilized power signal.
Described power supply output port 103, be used for connecting outside power device, and when described derailing switch 102 is in conducting state,, by with described power input mouth 101, being connected, accessing described external stabilized power signal described outside power device is powered.
Described signal deteching circuit, be used for accessing the measured signal of described outside power device, and the measured signal of described outside power device carried out transferring to described single-chip microcomputer 104 after preliminary treatment.
Described single-chip microcomputer 104, be used for judging whether the measured signal of described outside power device is normal, to obtain testing result; And at described measured signal, while being normal, controlling described derailing switch 102 and be in conducting state; , control described derailing switch 102 and be in off-state while being abnormal at described measured signal.
During concrete enforcement, described derailing switch 102 is for containing high-power P type MOS(Metal Oxide Semiconductor, oxide semiconductor) electronic switch of field-effect transistor.The advantages such as that electronic switch possesses is high-power, noise is low, speed is fast, reliability is high and loss is low, and can be by the configuration binding post, so that the user adjusts flexibly to the polarity of the stabilized voltage power supply signal of input.
Described display unit 105, be used for the testing result of 104 pairs of described outside power devices of described single-chip microcomputer is carried out output display.
In the present embodiment, external stabilized power, via the power input mouth 101 in the power supply detection control apparatus, is under conducting state at derailing switch 102, listens power supply output port 103 to export to outside power device the external stabilized power signal; Simultaneously, after the energising of outside power device started, the power supply detection control apparatus carried out signals collecting by each road signal deteching circuit to the relevant position of outside power device, to obtain detection signal.During concrete enforcement, the signal deteching circuit on each road works alone, and does not interfere with each other, and can need to detect the diverse location of outside power device according to practical application.
Particularly, the operation principle of described power supply detection control apparatus is: the circuit operation of the outside power device of each road signal deteching circuit Real-Time Monitoring, and the measured signal that Real-time Collection obtains is transferred to single-chip microcomputer 104; Single-chip microcomputer 104 stores normal operation parameter area or the threshold value of each road signal deteching circuit, also can arrange by running parameter scope or the threshold value of user Dui Mei road signal deteching circuit.In concrete testing process, the measured signal that single-chip microcomputer 104 gathers the signal deteching circuit on each road and the normal value of its storage compare, when described measured signal while being normal, single-chip microcomputer 104 is controlled described derailing switch 102 conductings, thereby makes external stabilized power to power to outside power device by described power supply detection control apparatus; When the measured signal that gathers when any road signal deteching circuit was abnormal, single-chip microcomputer 104 was controlled described derailing switches 102 cut-offs, thereby being connected of disconnecting external stabilized voltage power supply and outside power device do not burnt to protect outside power device.
, referring to Fig. 2, be the internal structure schematic diagram of the signal deteching circuit that provides of first embodiment of the invention.
In the present embodiment, further, the described signal deteching circuit in each road comprises voltage detecting circuit; Described measured signal comprises voltage signal to be measured; Described voltage detecting circuit, be used for accessing the voltage signal to be measured of described outside power device, and described voltage signal to be measured carried out transferring to described single-chip microcomputer 104 after voltage division processing.
The described signal deteching circuit in each road also comprises current detection circuit; Described measured signal also comprises current signal to be measured; Described current detecting electric current, be used for accessing the current signal to be measured of described outside power device, and described current signal to be measured carried out transferring to described single-chip microcomputer 104 after differential amplification.
Take signal deteching circuit shown in Figure 11 as example, as shown in Figure 2, signal deteching circuit 1 comprises voltage detecting circuit 11 and current detection circuit 12.Wherein, voltage detecting circuit 11 is respectively used to detect voltage signal and the current signal of outside power device with current detection circuit 12, and independently described voltage signal and current signal transfer is processed to single-chip microcomputer 104.
Need to prove, as preferred embodiment, (signal deteching circuit 1 as shown in Figure 1 for each road signal deteching circuit that the embodiment of the present invention provides, signal deteching circuit 2, signal deteching circuit n, wherein n 〉=2) include respectively a road voltage detecting circuit and a road current detection circuit.
, referring to Fig. 3, be the circuit theory diagrams of a kind of implementation of the voltage detecting circuit that provides of first embodiment of the invention.
In a kind of attainable mode, described voltage detecting circuit is comprised of the first resistor R1, the second resistor R2, the first capacitor C1, the second capacitor C2, the first operational amplifier U1 and the first clamp circuit.
Wherein, the end of described the first resistor R1 is used for accessing voltage signal Vin to be measured, and the other end is connected to the input in the same way of described the first operational amplifier U1, and described voltage signal Vin to be measured is carried out dividing potential drop.
Described the second resistor R2 is with after described the first capacitor C1 is in parallel, and an end is connected to the in-phase input end of described the first operational amplifier U1, and other end ground connection is used for the voltage signal Vin described to be measured of access is carried out filtering.
The end of described the second capacitor C2 is connected to the positive supply input of described the first operational amplifier U1, and the other end connects ground; The reverse input end of described the first operational amplifier U1 is connected with the output end vo ut of described the first operational amplifier U1, forms voltage follower.The negative supply input end grounding of the first operational amplifier U1.Voltage follower through the first operational amplifier U1 forms, can effectively improve the input impedance to the next stage circuit,, to reduce the impact of voltage detecting circuit on the voltage signal to be measured of required collection, improves the precision that data are processed.
The output of described the first operational amplifier U1 is connected with described single-chip microcomputer 104, is used for carrying out voltage signal described to be measured after dividing potential drop and transfers to described single-chip microcomputer 104 and detect.During concrete enforcement, described single-chip microcomputer 104 is provided with D/A converting circuit, and the voltage signal of described the first operational amplifier U1 output will be transported to the D/A converting circuit of single-chip microcomputer 104 inside and process.And, because the first operational amplifier U1 has formed voltage follower in the present embodiment, effectively improved the input impedance of D/A converting circuit, improved the precision of the detection signal that gathers.
Described the first clamp circuit is comprised of the series circuit of the first diode D1 and the second diode D2, wherein, the negative pole of the positive pole of described the first diode D1 and described the second diode D2 is connected to the output end vo ut of described the first operational amplifier U1 jointly, is used for the voltage signal of described the first operational amplifier U1 output is limited.Particularly, the positive pole of described the first diode D1 is with after the negative pole of described the second diode D2 is connected, be connected on the output of described the first operational amplifier U1, the negative pole of described the first diode D1 connects 3.3 volts of voltage signal V2, the plus earth of described the second diode D2.This first clamp circuit is in the normal voltage scope for the voltage signal values of the output end vo ut that limits described the first operational amplifier U1, so that described single-chip microcomputer 104 is carried out overvoltage protection.
Preferably, can to adopt model be the operational amplifier of TL062 to described the first operational amplifier.Because technotron has been adopted in its inside, operational amplifier TL062 possesses the high advantage of input impedance, can effectively avoid the interference of the offset current signal of input Vin access to the voltage signal of required sampling.
Especially, when described voltage detecting circuit is used for set-top box is carried out signals collecting, the input Vin of described the first operational amplifier U1 is used for voltage signal acquisition is carried out in a certain position of the motherboard circuit of set-top box, and the voltage that the positive supply input V1 of described the first operational amplifier U1 accesses is 12 volts.
, referring to Fig. 4, be the circuit theory diagrams of a kind of implementation of the current detection circuit that provides of first embodiment of the invention.
In a kind of attainable mode, described current detection circuit is comprised of the 3rd resistor R3, the 4th resistor R4, the 5th resistor R5, the 6th resistor R6, the second operational amplifier U2 and the second clamp circuit.
Described the 3rd resistor R3 and described the 4th resistor R4 are connected to the reverse input end of described the second operational amplifier U2 and input in the same way, are used for current signal difference to be measured is inputed to described the second operational amplifier U2; Wherein, the differential input end of current detection circuit anodal In+, negative pole In-, in the specific implementation, be connected to the two ends (usually anodal In+, negative pole In-of differential input end is connected to the two ends of a certain measuring resistance of outside power device) of electronic device of the required measurement of outside power device.
The end of described the 5th resistor R5 is connected to the in-phase input end of described the second operational amplifier U2, other end ground connection; The end of described the 6th resistor R6 is connected to the reverse input end of described the second operational amplifier U2, and the other end is connected to the output Out of described the second operational amplifier U2.
The output Out of described the second operational amplifier U2 is connected with described single-chip microcomputer 104, and current signal transfer described to be measured to the described single-chip microcomputer 104 that is used for carrying out after differential amplification detects.
Described the second clamp circuit is comprised of the series circuit of the 3rd diode D3 and the 4th diode D4, wherein, the negative pole of the positive pole of described the 3rd diode D3 and described the 4th diode D4 is connected to the output of described the second operational amplifier U2 jointly, is used for the voltage signal of described the second operational amplifier U2 output is limited.
During concrete enforcement, because current detection circuit is less to the current signal amplitude that outside power device collects, therefore, each resistor in current detection circuit and the second operational amplifier U2 form differential amplifier circuit, after the low current signal of anodal In+, the negative pole In-input of the differential input end of current detection circuit is suitably amplified, send in single-chip microcomputer 104 and detect, to improve the precision of measuring.
Especially, when the 3rd resistor R3 and the 4th equal value of resistor R4 are 10k Ω, the 5th resistor R5 and the 6th equal value of resistor R6 are 100k Ω, and when the second operational amplifier U2 model was TL062, this current detection circuit can be realized 0 ~ 5A(peace) current sample work.Need to prove, each electronic device of the current detection circuit that the embodiment of the present invention provides comprises but is not limited to the above value.
In the present embodiment, described the second clamp circuit is identical with the basic principle of the first clamp circuit, acquire the second clamp circuit at the current detection circuit output, its objective is and control within the specific limits for the current swing of the output with operational amplifier, avoid the electronic circuit of the current signal of operational amplifier output terminal to single-chip microcomputer inside, the especially overcurrent of the analog to digital converter of single-chip microcomputer inside infringement.
, referring to Fig. 5, be the structural representation of the second embodiment of power supply detection control apparatus provided by the invention.
The present embodiment is on the basis of the first embodiment, and further, described power supply detection control apparatus also comprises controls button 201 and voltage conversion unit 202.
Wherein, described control button 201 is used for described single-chip microcomputer 104 is carried out the parameter setting.During concrete enforcement, the user can arrange by the running parameter of controlling 201 pairs of single-chip microcomputers 104 of button.For example, by controlling voltage signal threshold value and the current signal threshold value of button 201 to the signal deteching circuit on single-chip microcomputer 104 each road of input; When the voltage signal to be measured that single-chip microcomputer 104 Zai Duige road signal deteching circuits gather or current signal to be measured detect, itself and user can be compared by controlling the default respective threshold of button 201, thereby judge whether the live signal that corresponding signal deteching circuit gathers is normal.
Described voltage conversion unit 202 is comprised of pressurizer 2021 and reference voltage source 2022, be used for the external stabilized power signal of described power input mouth 101 inputs is changed, and the power supply signal after changing inputs to described single-chip microcomputer 104, so that described single-chip microcomputer 104 is powered.
In the present embodiment, further, the display unit 105 of described power supply detection control apparatus also comprises liquid crystal display 1051 and multichannel indicating lamp device 1052.
Wherein, described liquid crystal display 1051 is used for receiving the testing result of described single-chip microcomputer 104, and described testing result is carried out output display.During concrete enforcement, the engineering staff can obtain intuitively by liquid crystal display 1051 real-time detector data of each road signal deteching circuit,, so that the operating state of outside power device is further analyzed, be particularly suitable for the application scenario in the circuit main board performance test.
Described indicator light 1052 is used to indicate the operating state of described signal deteching circuit.Particularly, described indicator light 1052 adopts LED(Light-Emitting Diode, light-emitting diode) realize.When described signal deteching circuit was provided with the n road, described power supply detection control apparatus need to arrange the LED on 2n road, and the signal deteching circuit on each road is indicated by the LED of two-way; Wherein a paths of LEDs is used to refer to the operating state of the voltage detecting circuit in signal deteching circuit, and an other paths of LEDs is used to indicate the operating state of the current detection circuit in signal deteching circuit.In concrete indication process, when indicator light 1052,, for the normal measured signal that represents that this road signal deteching circuit detects when bright is normal, represent that measured signal breaks down during for flicker; Wherein, can also further with fast blink, represent measured signal overvoltage or overcurrent, at a slow speed under-voltage the or undercurrent of flicker expression.Need to prove, the indicator light of the embodiment of the present invention includes but not limited to by treat the indication of slowdown monitoring circuit with upper type, can also indicate by distinguishing the modes such as indicator light colors.
Again further, the power supply detection control apparatus that provides of the present embodiment also comprises first serial J1 and second serial J2.
Wherein, described first serial J1 is used for connecting outer computer, by described outer computer, described single-chip microcomputer is carried out the parameter setting.
Described second serial J2 is used for connecting described outside power device,, with by in conjunction with described first serial J1, realizes the transfer of data of described outer computer and described outside power device.
, referring to Fig. 6, be the first serial that provides of second embodiment of the invention and a kind of communication connection circuit theory diagrams of second serial.
Particularly, first serial J1 is connected chip ADM3202ARN with second serial J2 by serial ports and connects.ADM3202ARN is high speed, binary channels RS232 interface device, RS232 is the EIA(Electronic Industry Association of EIA) a kind of serial physical interface of formulating, adopt+3.3 V single power supplies, it has low-power consumption and turn-off characteristic, is fit to very much battery powered portable apparatus and uses.Wherein, first serial J1 has a data input RX1 and data output end TX1, and second serial J2 has a data discrepancy end RX2 and data output end TX2 equally.By first serial J1 is connected reasonable circuit connection with second serial J2, outer computer can arrange the running parameter of single-chip microcomputer 104 by first serial J1, or single-chip microcomputer 104 can send data to outer computer by first serial J1; Simultaneously outer computer can transfer to outside power device with data via the power supply detection control apparatus by being connected of first serial J1 and second serial J2, and realizes the data communication of outer computer and outside power device.
The embodiment of the present invention also provides a kind of electric power supply control system.
, referring to Fig. 7, be the structural representation of an embodiment of a kind of electric power supply control system provided by the invention.
In the present embodiment, described electric power supply control system comprises: stabilized voltage power supply 701, power supply detection control apparatus 702, power device 703 and computer 704.
Described stabilized voltage power supply 701 is used for powering by 702 pairs of described power devices 703 of described power supply detection control apparatus.
Described power supply detection control apparatus 702 is the described power supply detection control apparatus of any one that the first embodiment or the second embodiment put down in writing, and is used for the operating state of described power device 703 is detected; And when described power device 703 being detected and break down, disconnect being electrically connected to of described stabilized voltage power supply 701 and described power device 703, and fault message is carried out output display.
Described computer 704 is used for described power supply detection control apparatus 702 is carried out the parameter setting, and is used for carrying out transfer of data by described power supply detection control apparatus 702 with described power device 703.
Preferably, described power device 703 is set-top box.
In the set-top box production test procedure, the electric power supply control system that can utilize the present embodiment to provide, utilize objective circuit or the circuit node of 702 pairs of set-top box of described power supply detection control apparatus to carry out voltage detecting and current detecting.in the moment that the power supply of the circuit main board to set-top box starts, power supply detection control apparatus 702 can collect corresponding voltage signal and current signal, if find that after testing this voltage signal or current signal are abnormal, as surpassing normal range of operation, power supply detection control apparatus 702 is closed its inner derailing switch at once, thereby disconnect the power supply of stabilized voltage power supply to set-top box, and with testing result, comprise fault type, the information outputs such as malfunctioning node position show to the display unit of establishing in power supply detection control apparatus 702, avoided set-top box and burnt in test process or in use procedure, and be convenient to the engineering staff fault is carried out analyzing and testing.
Need to prove, the present embodiment can be applied but be not limited to the set top box testing technical field.Any electric power supply control system that to the strict power device of power reguirements or circuit main board, all can adopt the embodiment of the present invention to provide is powered.
The above is the preferred embodiment of the present invention; should be pointed out that for those skilled in the art, under the premise without departing from the principles of the invention; can also make some improvements and modifications, these improvements and modifications also are considered as protection scope of the present invention.
Claims (10)
1. a power supply detection control apparatus, is characterized in that, comprising: power input mouth, derailing switch, power supply output port, single-chip microcomputer, Multi-path signal detecting circuit and display unit;
Described power input mouth, be used for access external stabilized power signal;
Described power supply output port, be used for connecting outside power device, and when described derailing switch is in conducting state,, by with described power input mouth, being connected, accessing described external stabilized power signal described outside power device is powered;
Described signal deteching circuit, be used for accessing the measured signal of described outside power device, and the measured signal of described outside power device carried out transferring to described single-chip microcomputer after preliminary treatment;
Described single-chip microcomputer, be used for judging whether the measured signal of described outside power device is normal, to obtain testing result; And at described measured signal, while being normal, controlling described derailing switch and be in conducting state; , control described derailing switch and be in off-state while being abnormal at described measured signal;
Described display unit, be used for described single-chip microcomputer is carried out output display to the testing result of described outside power device.
2. power supply detection control apparatus as claimed in claim 1, is characterized in that, the described signal deteching circuit in each road comprises voltage detecting circuit; Described measured signal comprises voltage signal to be measured;
Described voltage detecting circuit, be used for accessing the voltage signal to be measured of described outside power device, and described voltage signal to be measured carried out transferring to described single-chip microcomputer after voltage division processing.
3. power supply detection control apparatus as claimed in claim 2, is characterized in that, the described signal deteching circuit in each road also comprises current detection circuit; Described measured signal also comprises current signal to be measured;
Described current detecting electric current, be used for accessing the current signal to be measured of described outside power device, and described current signal to be measured carried out transferring to described single-chip microcomputer after differential amplification.
4. power supply detection control apparatus as claimed in claim 2, is characterized in that, described voltage detecting circuit is comprised of the first resistor, the second resistor, the first capacitor, the second capacitor, the first operational amplifier and the first clamp circuit;
One end of described the first resistor is used for accessing voltage signal to be measured, and the other end is connected to the input in the same way of described the first operational amplifier, and described voltage signal to be measured is carried out dividing potential drop;
After described the second resistor and described the first Parallel-connected Capacitor, an end is connected to the in-phase input end of described the first operational amplifier, and other end ground connection is used for the voltage signal described to be measured of access is carried out filtering;
One end of described the second capacitor is connected to the positive supply input of described the first operational amplifier, and the other end connects ground; The reverse input end of described the first operational amplifier is connected with the output of described the first operational amplifier, forms voltage follower;
The output of described the first operational amplifier is connected with described single-chip microcomputer, is used for carrying out voltage signal described to be measured after dividing potential drop and transfers to described single-chip microcomputer and detect;
Described the first clamp circuit is comprised of the series circuit of the first diode and the second diode, wherein, the negative pole of the positive pole of described the first diode and described the second diode is connected to the output of described the first operational amplifier jointly, is used for the voltage signal of described the first operational amplifier output is limited.
5. power supply detection control apparatus as claimed in claim 3, is characterized in that, described current detection circuit is comprised of the 3rd resistor, the 4th resistor, the 5th resistor, the 6th resistor, the second operational amplifier and the second clamp circuit;
Described the 3rd resistor and described the 4th resistor are connected to the reverse input end of described the second operational amplifier and input in the same way, are used for current signal difference to be measured is inputed to described the second operational amplifier;
One end of described the 5th resistor is connected to the in-phase input end of described the second operational amplifier, other end ground connection; One end of described the 6th resistor is connected to the reverse input end of described the second operational amplifier, and the other end is connected to the output of described the second operational amplifier;
The output of described the second operational amplifier is connected with described single-chip microcomputer, and current signal transfer described to be measured to the described single-chip microcomputer that is used for carrying out after differential amplification detects;
Described the second clamp circuit is comprised of the series circuit of the 3rd diode and the 4th diode, wherein, the negative pole of the positive pole of described the 3rd diode and described the 4th diode is connected to the output of described the second operational amplifier jointly, is used for the voltage signal of described the second operational amplifier output is limited.
6. power supply detection control apparatus as described in claim 1 ~ 5 any one, is characterized in that, described display unit comprises liquid crystal display and multichannel indicator light;
Described liquid crystal display is used for receiving the testing result of described single-chip microcomputer, and described testing result is carried out output display;
Described indicator light is used to indicate the operating state of described signal deteching circuit.
7. power supply detection control apparatus as claimed in claim 6, is characterized in that, described device also comprises controls button and voltage conversion unit;
Described control button is used for described single-chip microcomputer is carried out the parameter setting;
Described voltage conversion unit is comprised of pressurizer and reference voltage source, be used for the external stabilized power signal of described power input mouth input is changed, and the power supply signal after changing inputs to described single-chip microcomputer, so that described single-chip microcomputer is powered.
8. power supply detection control apparatus as claimed in claim 7, is characterized in that, described device also comprises first serial and second serial;
Described first serial is used for connecting outer computer, by described outer computer, described single-chip microcomputer is carried out the parameter setting;
Described second serial is used for connecting described outside power device,, with by in conjunction with described first serial, realizes the transfer of data of described outer computer and described outside power device.
9. an electric power supply control system, is characterized in that, described system comprises: stabilized voltage power supply, power supply detection control apparatus, power device and computer;
Described stabilized voltage power supply is used for by described power supply detection control apparatus, described power device being powered;
Described power supply detection control apparatus is power supply detection control apparatus as described in claim 1 ~ 8 any one, is used for the operating state of described power device is detected; And when described power device being detected and break down, disconnect being electrically connected to of described stabilized voltage power supply and described power device, and fault message is carried out output display;
Described computer is used for described power supply detection control apparatus is carried out the parameter setting, and is used for carrying out transfer of data by described power supply detection control apparatus and described power device.
10. electric power supply control system as claimed in claim 9, is characterized in that, described power device is set-top box.
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