Competitive power supply circuit for POS machine test server

Abstract

The utility model provides a competitive power supply circuit for a POS machine test server, which comprises a 24V direct power supply, a standby power supply, a competitive power supply switching circuit and a direct power supply state monitoring circuit, and is characterized in that the output end of the 24V direct power supply is connected with the input end of the competitive power supply switching circuit and the input end of the direct power supply state monitoring circuit; the output end of the direct power supply state monitoring circuit is connected with the input end of the competitive power supply switching circuit, the output end of the competitive power supply switching circuit is in power supply connection with the POS machine test server, and the input end of the competitive power supply switching circuit is further connected with the output end of the standby power supply. The beneficial effects of the utility model are that a 24V direct power supply and a standby battery can compete to supply power to the POS machine test server, the circuit is simple, the cost is low, and the circuit is suitable for being directly integrated on the circuit board of the POS machine test server.

Description

TECHNICAL FIELD

[0001] The utility model relates to a circuit technical field, concretely relates to a kind of competitive power supply circuit for POS machine test server. BACKGROUND

[0002] POS machine is a kind of multifunctional terminal, install POS machine in credit card special partner and acceptance network point and form network with computer, and it can realize electronic fund automatic transfer, it has support consumption, pre-authorization, balance inquiry and transfer function, use safe, fast, reliable.

[0003] POS machine test server is a kind of test equipment, is used to test the stability of POS machine in the development stage of POS machine equipment, usually needs to work continuously for 7 days every day 24 hours, in order to avoid the power-off situation that accidentally appears, usually additional standby power supply is used to compete for power supply, to ensure the integrity and accuracy of test, that is, standby power supply keeps switching posture at any time, immediately switches standby power supply power supply once power-off, keeps POS machine test server and does not interrupt test by power-off. At present, the existing POS machine test server power supply usually uses UPS power supply (Uninterruptible Power System, Uninterruptible Power Supply) to power supply, but this UPS power supply usually cost is very high, and the volume is very large, also not suitable for integrated into the circuit board of POS machine test server itself, the use experience that people brings is not good enough. UTILITY MODEL CONTENTS

[0004] To solve the problems in the prior art, the utility model provides a kind of competitive power supply circuit for POS machine test server, by being arranged in the competitive power supply circuit for POS machine test server 24V direct power supply, standby power supply, competitive power supply switching circuit and direct power supply state monitoring circuit that cooperate with each other, competitive power supply switching circuit can automatically switch into standby power supply for POS machine test server power supply work according to the information fed back by direct power supply state monitoring circuit, can realize 24V direct power supply and standby battery for POS machine test server competitive power supply, circuit is simple, cost is low, suitable for directly integrated into the circuit board of POS machine test server itself, greatly improve the use experience of user, solve the problem that the POS machine test server of prior art needs uninterrupted power supply usually uses UPS power supply cost is high, the problem of large volume.

[0005] The utility model provides a kind of for POS machine test server's competitive power supply circuit, including 24V direct power supply, backup power supply, competitive power supply switching circuit and direct power supply state monitoring circuit, the output of the 24V direct power supply is connected with the input of the competitive power supply switching circuit, the input of the direct power supply state monitoring circuit, the output of the direct power supply state monitoring circuit is connected with the input of the competitive power supply switching circuit, the output of the competitive power supply switching circuit is connected with POS machine test server power supply, the input of the competitive power supply switching circuit is also connected with the output of the backup power supply, the competitive power supply switching circuit can be automatically switched into the backup power supply for POS machine test server power supply work according to the information fed back by the direct power supply state monitoring circuit.

[0006] The utility model makes further improvement, the competitive power supply switching circuit is equipped with field effect tube Q1, field effect tube Q2, resistance R1, resistance R3 and diode D1, wherein, the gate of field effect tube Q1 is connected with the source of field effect tube Q2, one end of resistance R1, the drain of field effect tube Q1 is connected with the other end of resistance R1, the negative pole of diode D1, the drain of field effect tube Q2, one end of resistance R3, the source of field effect tube Q1 is connected with the output of 24V direct power supply, the source of field effect tube Q1 is also connected with POS machine test server power supply, the positive pole of diode D1 is connected with the output of backup power supply, the gate of field effect tube Q2 is connected with the other end of resistance R3, the output of direct power supply state monitoring circuit.

[0007] The utility model makes further improvement, the competitive power supply switching circuit is also equipped with resistance R2, one end of resistance R2 is connected with the gate of field effect tube Q1, the source of field effect tube Q2, one end of resistance R1, the other end of resistance R2 is grounded.

[0008] The utility model makes further improvement, the direct power supply state monitoring circuit is equipped with triode Q3, resistance R4, resistance R5, resistance R6, resistance R7 and diode D2, wherein, the collector of triode Q3 is connected with one end of resistance R5, the other end of resistance R5 is connected with the gate of field effect tube Q2, the other end of resistance R3, the base of triode Q3 is connected with one end of resistance R6, the other end of resistance R6 is connected with one end of resistance R7, the positive pole of diode D2, the negative pole of diode D2 is connected with one end of resistance R4, the other end of resistance R4 is connected with the output of 24V direct power supply, the emitter of triode Q3, the other end of resistance R7 is grounded.

[0009] The resistance R1, the resistance R2 and the resistance R3 are all 10KΩ.

[0010] The resistance R4, the resistance R5 and the resistance R7 are all 10KΩ, and the resistance R6 is 1KΩ.

[0011] The backup power supply is a lead-acid battery or a lithium ion battery.

[0012] Compared with the prior art, the utility model has the advantages that a competition power supply circuit for a POS machine test server is provided, 24V direct power supply, a backup power supply, a competition power supply switching circuit and a direct power supply state monitoring circuit are arranged in the competition power supply circuit for the POS machine test server, the competition power supply switching circuit can automatically switch to the backup power supply to supply power to the POS machine test server according to the information fed back by the direct power supply state monitoring circuit, the 24V direct power supply and the backup battery can compete to supply power to the POS machine test server, the backup battery can be quickly switched to supply power to the POS machine test server when the 24V direct power supply is powered off, the uninterrupted power supply of the POS machine test server is ensured, the completeness and accuracy of the test are ensured, the 24V direct power supply is preferentially used to supply power to the POS machine test server regardless of whether the voltage of the backup battery is higher than 24V or lower than 24V, the circuit is simple, the cost is low, the circuit can be directly integrated into the circuit board of the POS machine test server, the use experience of the user is greatly improved, and the problem that the UPS power supply with high cost and large size is usually used for the uninterrupted power supply of the POS machine test server in the prior art is solved. BRIEF DESCRIPTION OF DRAWINGS

[0013] In order to more clearly illustrate the scheme of the utility model or the prior art, the drawings needed in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are some embodiments of the utility model, and those skilled in the art can also obtain other drawings according to the drawings without creative labor.

[0014] Figure 1 It is a circuit diagram of the competition power supply circuit for the POS machine test server of the utility model. DETAILED DESCRIPTION

[0015] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this application belongs; the terminology used in the specification herein is for describing particular embodiments only and is not intended to be limiting of the application; the present application is well suited to carry out various embodiments as broadly described herein without resorting to use of more specific terminology. The above specification, examples and data

[0016] Reference herein to "an embodiment" means that a particular feature, structure, or characteristic described in connection with the embodiment can be included in at least one embodiment of the application. The appearances of the phrase "in an embodiment" in various places in the specification are not necessarily all referring to the same embodiment, nor are they necessarily all directed to the same embodiment, or to a single alternative embodiment. It is expressly understood that any of the embodiments described herein can be incorporated into any other embodiments even though it can not be explicitly described within the same. It will be apparent to those skilled in the art that various modifications and variations can be made to the present application without departing from the spirit or scope of the application. There is no intention to limit the application to the specific embodiments disclosed, but the application is to cover all modifications and variations within the scope of the present application.

[0017] In order to make the technical personnel of the present application better understand the present application, the technical solutions in the embodiments of the present application will be clearly and completely described below in conjunction with the drawings.

[0018] As shown in Figure 1 The application provides a competition power supply circuit for a POS machine test server, which comprises a 24V direct power supply, a backup power supply, a competition power supply switching circuit and a direct power supply state monitoring circuit. The output end of the 24V direct power supply is connected with the input end of the competition power supply switching circuit and the input end of the direct power supply state monitoring circuit. The output end of the direct power supply state monitoring circuit is connected with the input end of the competition power supply switching circuit. The output end of the competition power supply switching circuit is connected with the POS machine test server for power supply. The input end of the competition power supply switching circuit is also connected with the output end of the backup power supply. In the embodiment, the competition power supply switching circuit can automatically switch to the backup power supply for the POS machine test server to work according to the information fed back by the direct power supply state monitoring circuit, can realize the competition power supply of the 24V direct power supply and the backup battery for the POS machine test server, can quickly switch the backup battery for the POS machine test server to supply power when the 24V direct power supply is powered off, and can further ensure the uninterrupted power supply of the POS machine test server to ensure the completeness and accuracy of the test. Moreover, no matter whether the voltage of the backup battery is higher than 24V or lower than 24V, the 24V direct power supply can be preferentially used for the POS machine test server to supply power. The circuit is simple, low in cost, suitable for being directly integrated into the circuit board of the POS machine test server itself, and greatly improves the user experience.

[0019] As shown in Figure 1As shown, the competition power supply switching circuit is provided with a field effect transistor Q1, a field effect transistor Q2, a resistor R1, a resistor R3 and a diode D1, wherein the gate of the field effect transistor Q1 is connected with the source of the field effect transistor Q2 and one end of the resistor R1, the drain of the field effect transistor Q1 is connected with the other end of the resistor R1, the negative electrode of the diode D1, the drain of the field effect transistor Q2 and one end of the resistor R3, the source of the field effect transistor Q1 is connected with the output end of the 24V direct power supply, the source of the field effect transistor Q1 is also connected with the power supply of the POS machine test server, the positive electrode of the diode D1 is connected with the output end of the backup power supply, the gate of the field effect transistor Q2 is connected with the other end of the resistor R3 and the output end of the direct power supply state monitoring circuit; the competition power supply switching circuit is also provided with a resistor R2, one end of the resistor R2 is connected with the gate of the field effect transistor Q1, the source of the field effect transistor Q2 and one end of the resistor R1, and the other end of the resistor R2 is grounded; the direct power supply state monitoring circuit is provided with a triode Q3, a resistor R4, a resistor R5, a resistor R6, a resistor R7 and a diode D2, wherein the collector of the triode Q3 is connected with one end of the resistor R5, the other end of the resistor R5 is connected with the gate of the field effect transistor Q2 and the other end of the resistor R3, the base of the triode Q3 is connected with one end of the resistor R6, the other end of the resistor R6 is connected with one end of the resistor R7 and the positive electrode of the diode D2, the negative electrode of the diode D2 is connected with one end of the resistor R4, the other end of the resistor R4 is connected with the output end of the 24V direct power supply, and the emitter of the triode Q3 and the other end of the resistor R7 are grounded; the resistance values of the resistor R1, the resistor R2 and the resistor R3 are all 10KΩ, the resistance values of the resistor R4, the resistor R5 and the resistor R7 are all 10KΩ, the resistance value of the resistor R6 is 1KΩ, and the backup power supply is a lead-acid battery or a lithium-ion battery. In this embodiment, when the 24V direct power supply supplies power for the POS machine test server, the triode Q3 will be in the state of conduction, if the backup battery voltage is less than 24V, the backup battery is cut off by the diode D1; if the backup battery voltage is greater than 24V, because the triode Q3 is in conduction, the field effect transistor Q2 will also be in conduction, in this way, the voltages on both sides of the resistor R1 will be the same, then the field effect transistor Q1 will not be in conduction, so the VOUT for supplying power for the POS machine test server is directly supplied by the 24V direct power supply. When the 24V direct power supply is suddenly powered off, because of the existence of the diode D2, when the 24V direct power supply drops to below 22V, the triode Q3 can be immediately cut off, after the triode Q3 is cut off, the field effect transistor Q2 will also be cut off, at this time, the Vgs voltage of the field effect transistor Q1 will have half of the backup battery voltage, which can ensure that the field effect transistor Q1 is completely in conduction, in this way, the backup battery is quickly switched to supply power for the POS machine test server, which ensures the normal operation of the POS machine test server.

[0020] From the above, the utility model provides a kind of competition power supply circuit for POS machine test server, by being set in the competition power supply circuit for POS machine test server 24V direct power supply, backup power supply, competition power supply switching circuit and direct power supply state monitoring circuit of mutual cooperation, competition power supply switching circuit can automatically switch into backup power supply according to the information fed back by direct power supply state monitoring circuit and be powered for POS machine test server, 24V direct power supply and backup battery can be realized for POS machine test server competition power supply, when 24V direct power supply is powered off, backup battery can be quickly switched for POS machine test server power supply, to ensure that POS machine test server uninterrupted power supply, to ensure the integrity and accuracy of test, and no matter whether the voltage of backup battery is higher than 24V or lower than 24V, 24V direct power supply can be realized for POS machine test server power supply, circuit is simple, cost is low, suitable for direct integration to the circuit board of POS machine test server itself, greatly improve the use experience of user, solve the problem of high cost and large size of UPS power supply in prior art, which is usually used for uninterrupted power supply for POS machine test server.

[0021] The above-described specific embodiments are preferred embodiments of the utility model, and are not intended to limit the specific implementation range of the utility model. The scope of the utility model includes, but is not limited to, the present specific embodiment. Any equivalent changes made in accordance with the utility model are within the scope of protection of the utility model.

Claims

1. A contention-based power supply circuit for a POS machine test server, characterized in that: The system includes a 24V direct power supply, a backup power supply, a competing power supply switching circuit, and a direct power supply status monitoring circuit. The output terminal of the 24V direct power supply is connected to the input terminals of the competing power supply switching circuit and the direct power supply status monitoring circuit. The output terminal of the direct power supply status monitoring circuit is connected to the input terminal of the competing power supply switching circuit. The output terminal of the competing power supply switching circuit is connected to the power supply of the POS machine test server. The input terminal of the competing power supply switching circuit is also connected to the output terminal of the backup power supply. The competing power supply switching circuit can automatically switch to the backup power supply to power the POS machine test server based on the information fed back by the direct power supply status monitoring circuit. The competing power supply switching circuit includes a field-effect transistor Q1, a field-effect transistor Q2, resistors R1 and R3, and a diode D1. The field-effect transistor Q1... The gate of transistor Q1 is connected to the source of transistor Q2 and one end of resistor R1. The drain of transistor Q1 is connected to the other end of resistor R1, the cathode of diode D1, the drain of transistor Q2, and one end of resistor R3. The source of transistor Q1 is connected to the output of the 24V direct power supply. The source of transistor Q1 is also connected to the power supply of the POS machine test server. The anode of diode D1 is connected to the output of the backup power supply. The gate of transistor Q2 is connected to the other end of resistor R3 and the output of the direct power supply status monitoring circuit. The competitive power supply switching circuit also includes resistor R2. One end of resistor R2 is connected to the gate of transistor Q1, the source of transistor Q2, and one end of resistor R1. The other end of resistor R2 is grounded.

2. The contention power supply circuit for a POS machine test server according to claim 1, characterized in that: The direct power supply status monitoring circuit includes a transistor Q3, resistors R4, R5, R6, R7, and a diode D2. The collector of transistor Q3 is connected to one end of resistor R5, the other end of resistor R5 is connected to the gate of field-effect transistor Q2 and the other end of resistor R3, the base of transistor Q3 is connected to one end of resistor R6, the other end of resistor R6 is connected to one end of resistor R7 and the anode of diode D2, the cathode of diode D2 is connected to one end of resistor R4, the other end of resistor R4 is connected to the output terminal of the 24V direct power supply, and the emitter of transistor Q3 and the other end of resistor R7 are grounded.

3. The contention power supply circuit for a POS machine test server according to claim 2, characterized in that: The resistance values ​​of resistors R1, R2, and R3 are all 10KΩ.

4. The contention power supply circuit for a POS machine test server according to claim 3, characterized in that: The resistance values ​​of resistors R4, R5, and R7 are all 10KΩ, and the resistance value of resistor R6 is 1KΩ.

5. The contention power supply circuit for a POS machine test server according to claim 4, characterized in that: The backup power source is a lead-acid battery or a lithium-ion battery.

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