CN204391888U - With the power supply of handoff functionality - Google Patents
With the power supply of handoff functionality Download PDFInfo
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- CN204391888U CN204391888U CN201420854584.4U CN201420854584U CN204391888U CN 204391888 U CN204391888 U CN 204391888U CN 201420854584 U CN201420854584 U CN 201420854584U CN 204391888 U CN204391888 U CN 204391888U
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Abstract
The power supply of the utility model band handoff functionality, comprising: Ni-MH battery group and external power supply, and described Ni-MH battery group is connected by double-point double-throw switch with described external power supply; Relay, described relay is connected with described double-point double-throw switch, and described relay is connected with described external power supply by AC/DC module; Bleeder circuit, described bleeder circuit is connected with described double-point double-throw switch; Switching circuit, described switching circuit is connected with described Ni-MH battery group and described bleeder circuit respectively; Voltage stabilizing circuit, described voltage stabilizing circuit is connected with described double-point double-throw switch.The power supply of the utility model band handoff functionality needs to move position as patient in infusion process, even and if move to there is no AC power particular surroundings under, also can not affect infusion process.When external ac power source restores electricity, equipment can automatically restore to original Alternating Current Power Supply again, and internal battery can be made like this to be charged.
Description
Technical field
The utility model patent is about medical injection pump, infusion pump when external ac power source disconnects, and is provided the functional realiey of uninterrupted power supply by its built-in Ni-MH battery group.
Background technology
Medical injection pump, infusion pump (hereinafter referred to as " equipment ") are the fluid delivery apparatus of widely used a kind of full-automatic, high accuracy, high reliability, the high security such as current various big hospital, health station, healthcare hospital for women & children, it is widely used in internal medicine, surgery, paediatrics, cardiology department, emergency department and operating room, is particularly useful for the infusion treatment in ICU and CCU ward.Also need to work under the particular surroundingss such as battlefield, field, ambulance, makeshift tent simultaneously.In these environment, facility can be very simple and crude, the AC power of 220V even cannot be provided, this just requires that equipment is except powering by external ac power source, also built-in power will be had, and requirement arbitrarily can switch between external ac power source and built-in power and can not affect the normal work of equipment.
Utility model content
The purpose of this utility model is to provide a kind of power supply that can realize the band handoff functionality freely switched between different electrical power that can not produce any impact on equipment work.
For solving the problems of the technologies described above, the power supply of the utility model band handoff functionality, comprising: Ni-MH battery group and external power supply, and described Ni-MH battery group is connected by double-point double-throw switch with described external power supply; Relay, described relay is connected with described double-point double-throw switch, and described relay is connected with described external power supply by AC/DC module; Bleeder circuit, described bleeder circuit is connected with described double-point double-throw switch; Switching circuit, described switching circuit is connected with described Ni-MH battery group and described bleeder circuit respectively; Voltage stabilizing circuit, described voltage stabilizing circuit is connected with described double-point double-throw switch.
Described bleeder circuit is the resistor voltage divider circuit be made up of the first resistance R3 and the second resistance R4.
Described switching circuit is made up of triode and metal-oxide-semiconductor; First triode TR3, the base stage of described first triode TR3 is connected with the dividing point of described bleeder circuit, the grounded emitter of described first triode TR3, the collector electrode of described first triode TR3 and the 4th resistance R2; The base stage of the second triode TR2, described second triode TR2 is connected with the collector electrode of described first triode TR3, the grounded emitter of described second triode TR2; The drain electrode of described metal-oxide-semiconductor TR1 is connected with described Ni-MH battery group, and the grid of described metal-oxide-semiconductor TR1 is connected with the collector electrode of described second triode TR2, and the source electrode of described metal-oxide-semiconductor TR1 is connected with described voltage stabilizing circuit; 3rd resistance R1, described 3rd resistance R1 are serially connected between the collector electrode of described Ni-MH battery group and described second triode TR2, and described 3rd resistance R1 is in parallel with described metal-oxide-semiconductor TR1.
Described metal-oxide-semiconductor TR1 source electrode be also connected in series one first voltage stabilizing didoe D1 between described voltage stabilizing circuit.
Described AC/DC module be also connected in series one second voltage stabilizing didoe D2 between described relay.
The power supply of the utility model band handoff functionality is made up of AC/DC power module and 14V Ni-MH battery group two parts, and powered to equipment by external communication 220V power supply under normal circumstances, AC/DC module converts the 220V alternating current of input to 18V DC power supply.When external ac power source is disconnected, electrical source exchange can automatically be powered to interior nickel hydrogen battery group by the power supply switch circuit of device interior, and the equipment that can not affect works normally.And when external ac power source is switched on again, power supply switch circuit can automatically switch back again ac power supply.When power supply is switched, other each functional module of equipment can work as usual, and the equipment aligned in use does not have any impact.When patient needs to move position in infusion process, even and if move to there is no AC power particular surroundings under, also can not affect infusion process.When external ac power source restores electricity, equipment can automatically restore to original Alternating Current Power Supply again, and internal battery can be made like this to be charged.
Accompanying drawing explanation
Fig. 1 is the power circuit diagram of the utility model band handoff functionality.
Embodiment
Be described in further detail below in conjunction with the power supply of accompanying drawing to the utility model band handoff functionality.
Relay in circuit, as core component, has three kinds of states during normal work: adhesive, release and transition state.When on the coil of relay, (between PIN1 and PIN8) applies the direct voltage of 10V ~ 18V, coil can produce magnetic force by plug-in strip adhesive, and during plug-in strip adhesive, PIN3 meeting and PIN4 connect, and PIN6 meeting and PIN5 connect.When not applying any voltage on the coil of relay, relay plug-in strip is release condition, and during plug-in strip release, PIN3 and PIN2 connects, PIN6 and PIN7 connects.When relay turns to attracting state from release condition, or turn to the process of release condition from attracting state, have a very of short duration transition state, now plug-in strip have left PIN2 and PIN7, but go back access failure to PIN4 and PIN5, the plug-in strip in this time is equivalent to vacant state.
As shown in Figure 1, the power supply of the utility model band handoff functionality, when external ac power source exports 18V direct voltage to "+DC " place by AC/DC module, there is electric current to flow through relay coil and produce magnetic attraction, plug-in strip is in attracting state, 18V DC power supply directly outputs to rear class voltage stabilizing circuit after being switched to PIN3 by relay plug-in strip from PIN4.Second voltage stabilizing didoe D2 plays the effect of one-way conduction here, prevents having reverse electric current and flows back to AC/DC module.The PIN6 place of relay is connected to the switching circuit be made up of triode and metal-oxide-semiconductor, each working point of switching circuit now is as follows: when the adhesive of relay plug-in strip, PIN6 meeting and PIN5 connect, and 18V direct voltage also can be switched to the resistance pressure-dividing network be made up of the first resistance R3 and the second resistance R4.According to voltage divider principle, dividing potential drop on the second resistance R4 can reach 1.25V, because the base stage of the first triode TR3 is connected to this dividing point, this some place voltage higher than the conducting voltage (0.7V) of triode, so now the first triode TR3 can be in saturation conduction state.And the base stage of the second triode TR2 is connected to the collector terminal of the first triode TR3, due to the saturation conduction of the first triode TR3, make the second triode TR2 base stage place current potential close to signal ground, so the second triode TR2 is in cut-off state.Because the second triode TR2 ends, the grid of metal-oxide-semiconductor TR1 is made to be pulled upward to Ni-MH battery group output voltage by R1 resistance, and the source electrode equipotential of metal-oxide-semiconductor TR1, so metal-oxide-semiconductor TR1 is also in cut-off state.Ni-MH battery group can not be pulled to the PIN3 of relay, therefore can not have an impact to the output of circuit.
When external ac power source disconnects, + DC place does not have direct current 18V voltage, relay coil discharges plug-in strip because not having voltage, relay PIN2 and PIN3 connects, so Ni-MH battery group is connected to total output VOUT place of power supply switch circuit, now powered by the rear class voltage stabilizing circuit of Ni-MH battery groups to devices.When relay PIN2 and PIN3 connect after, the branch road at metal-oxide-semiconductor TR1 place is equivalent to be shorted, thus metal-oxide-semiconductor TR1 whatsoever state all can not have an impact to rear class.
The third state: transition state.Namely relay plug-in strip is in by the vacant state of in adhesive or dispose procedure, PIN3 with PIN6 of relay other any pin of getting along well is connected.Although this process very of short duration, if do not processed, will make the rear class voltage stabilizing circuit short time lose power supply supply.So the microcontroller of equipment will reset because of power-off, and motor also can the stall because of power-off, and equipment will quit work the short time.So one of critical function of circuit is exactly avoid, when relay is in an interim state, occurring the phenomenon of short time power-off.Concrete function is achieved in that, when relay is by attracting state or release condition transition vacant state, the first triode TR3 can by the second resistance R4 resistive pull-downs to signal ground, and the first triode TR3 now can be in cut-off state.The base stage of the second triode TR2 is pulled upward to 5V power supply by the 4th resistance R2 resistance, so the second triode TR2 meeting saturation conduction, makes the grid potential of metal-oxide-semiconductor TR1 pulled down to signal ground.Metal-oxide-semiconductor TR1 will saturation conduction, and when metal-oxide-semiconductor TR1 saturation conduction, Ni-MH battery group will be switched to total output VOUT of power supply switch circuit by the branch road at metal-oxide-semiconductor TR1 place.The first voltage stabilizing didoe D1 in branch road plays the effect of one-way conduction here, prevents having reverse electric current and flows back to metal-oxide-semiconductor TR1.
No matter which kind of state relay is in, and total output VOUT of circuit always has power supply supply.When relay is in attracting state, powered to rear class voltage stabilizing circuit by AC/DC module by external ac power source.And when relay is in release condition, powered to rear class voltage stabilizing circuit by Ni-MH battery group.When relay is in transition vacant state, the switching circuit of triode and metal-oxide-semiconductor composition can play a role, and Ni-MH battery group is switched to total output of circuit.
By with the coordinating of power supply switch circuit, Ni-MH battery composition, in order to the uninterrupted power supply of equipment, reaches the object that device power supply (DPS) can arbitrarily be switched.
The power supply of the utility model band handoff functionality is made up of AC/DC power module and 14V Ni-MH battery group two parts, and powered to equipment by external communication 220V power supply under normal circumstances, AC/DC module converts the 220V alternating current of input to 18V DC power supply.When external ac power source is disconnected, electrical source exchange can automatically be powered to interior nickel hydrogen battery group by the power supply switch circuit of device interior, and the equipment that can not affect works normally.And when external ac power source is switched on again, power supply switch circuit can automatically switch back again ac power supply.When power supply is switched, other each functional module of equipment can work as usual, and the equipment aligned in use does not have any impact.When patient needs to move position in infusion process, even and if move to there is no AC power particular surroundings under, also can not affect infusion process.When external ac power source restores electricity, equipment can automatically restore to original Alternating Current Power Supply again, and internal battery can be made like this to be charged.
Below the preferred embodiment that the utility model is created is illustrated, but the utility model is created and is not limited to described embodiment, those of ordinary skill in the art also can make all equivalent modification or replacement under the prerequisite without prejudice to the invention spirit, and these equivalent modification or replacement are all included in the application's claim limited range.
Claims (5)
1. be with the power supply of handoff functionality, it is characterized in that, comprising:
Ni-MH battery group and external power supply, described Ni-MH battery group is connected by double-point double-throw switch with described external power supply;
Relay, described relay is connected with described double-point double-throw switch, and described relay is connected with described external power supply by AC/DC module;
Bleeder circuit, described bleeder circuit is connected with described double-point double-throw switch;
Switching circuit, described switching circuit is connected with described Ni-MH battery group and described bleeder circuit respectively;
Voltage stabilizing circuit, described voltage stabilizing circuit is connected with described double-point double-throw switch.
2. the power supply of band handoff functionality according to claim 1, is characterized in that, described bleeder circuit is the resistor voltage divider circuit be made up of the first resistance R3 and the second resistance R4.
3. the power supply of band handoff functionality according to claim 1, is characterized in that, described switching circuit is made up of triode and metal-oxide-semiconductor;
First triode TR3, the base stage of described first triode TR3 is connected with the dividing point of described bleeder circuit, the grounded emitter of described first triode TR3, the collector electrode of described first triode TR3 and the 4th resistance R2;
The base stage of the second triode TR2, described second triode TR2 is connected with the collector electrode of described first triode TR3, the grounded emitter of described second triode TR2;
The drain electrode of described metal-oxide-semiconductor TR1 is connected with described Ni-MH battery group, and the grid of described metal-oxide-semiconductor TR1 is connected with the collector electrode of described second triode TR2, and the source electrode of described metal-oxide-semiconductor TR1 is connected with described voltage stabilizing circuit;
3rd resistance R1, described 3rd resistance R1 are serially connected between the collector electrode of described Ni-MH battery group and described second triode TR2, and described 3rd resistance R1 is in parallel with described metal-oxide-semiconductor TR1.
4. the power supply of band handoff functionality according to claim 3, is characterized in that, described metal-oxide-semiconductor TR1 source electrode be also connected in series one first voltage stabilizing didoe D1 between described voltage stabilizing circuit.
5. the power supply of band handoff functionality according to claim 1, is characterized in that, described AC/DC module be also connected in series one second voltage stabilizing didoe D2 between described relay.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420854584.4U CN204391888U (en) | 2014-12-26 | 2014-12-26 | With the power supply of handoff functionality |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201420854584.4U CN204391888U (en) | 2014-12-26 | 2014-12-26 | With the power supply of handoff functionality |
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| Publication Number | Publication Date |
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| CN204391888U true CN204391888U (en) | 2015-06-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201420854584.4U Active CN204391888U (en) | 2014-12-26 | 2014-12-26 | With the power supply of handoff functionality |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649687A (en) * | 2018-06-13 | 2018-10-12 | 杭州四方博瑞科技股份有限公司 | A kind of control method, system and the circuit of the switching of double copies power supply |
| CN111564834A (en) * | 2020-04-13 | 2020-08-21 | 上海紫通信息科技有限公司 | Power supply method for power distribution terminal tester and storage battery activation method |
-
2014
- 2014-12-26 CN CN201420854584.4U patent/CN204391888U/en active Active
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN108649687A (en) * | 2018-06-13 | 2018-10-12 | 杭州四方博瑞科技股份有限公司 | A kind of control method, system and the circuit of the switching of double copies power supply |
| CN111564834A (en) * | 2020-04-13 | 2020-08-21 | 上海紫通信息科技有限公司 | Power supply method for power distribution terminal tester and storage battery activation method |
| CN111564834B (en) * | 2020-04-13 | 2024-04-16 | 上海紫通信息科技有限公司 | Power supply method of distribution terminal tester and storage battery activation method |
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