Voltage monitoring sensor

Abstract

The utility model discloses a voltage monitoring sensor, which belongs to the technical field of voltage sensors and comprises a power supply module, a voltage acquisition module, a voltage signal amplification module, a voltage signal filtering module and an OC output module, the power supply module supplies power to the voltage acquisition module, the voltage signal amplification module, the voltage signal filtering module and the OC output module. The problem that it is difficult to accurately monitor and feed back the abnormal voltage of the storage battery pack is solved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to voltage sensor technical field especially relates to a voltage monitoring sensor. BACKGROUND

[0002] The radio frequency remote unit (RRU, Remote Radio Unit) equipment of GSM-R distributed base station is applied in the outdoor scene such as tunnel, bridge along the railway.The stability and accuracy of power voltage are crucial to the normal operation of RRU equipment, and too high or too low voltage can cause damage to RRU equipment, affect communication quality and even cause equipment failure.At present, in order to ensure the stability of RRU equipment power supply, the battery pack capable of standby for several hours is configured correspondingly, but there is still a problem that the voltage of battery pack cannot be accurately monitored, and if the effective operation time of RRU equipment cannot be accurately fed back in time after power failure, and the voltage abnormality of RRU equipment is not timely alarmed, there will be great safety hazards. UTILITARIAN CONTENT

[0003] In view of the above-mentioned deficiencies in the prior art, the utility model provides a voltage monitoring sensor, which solves the problem of difficult accurate monitoring and feedback of battery pack voltage abnormality.

[0004] In order to achieve the above-mentioned invention purpose, the utility model adopts the technical scheme that:

[0005] The utility model provides a voltage monitoring sensor, which comprises a power module, and voltage acquisition module, voltage signal amplification module, voltage signal filtering module and OC output module connected in sequence.

[0006] The power module supplies power for the voltage acquisition module, voltage signal amplification module, voltage signal filtering module and OC output module.

[0007] The utility model discloses an advantageous effect is: the utility model provides a kind of voltage monitoring sensor, power module is powered for voltage acquisition module, voltage signal amplification module, voltage signal filter module and OC output module, to guarantee voltage monitoring sensor stable work, by voltage acquisition module, the voltage acquisition signal of the battery pack of RRU equipment can be monitored, and voltage acquisition signal is transmitted to voltage signal amplification module, voltage acquisition signal can be amplified, to adapt the I / O input voltage demand of MCU, obtain voltage amplification signal, voltage signal filter module can effectively remove the voltage noise and exogenous interference in hardware circuit, to obtain voltage filter signal, voltage filter signal is input OC output module, based on microprocessor technology and high-precision analog-digital converter can accurately capture the voltage parameter of battery pack, realize accurate monitoring the battery pack voltage of RRU equipment, again by comparing with the voltage threshold value set in advance, output OC switch quantity detection signal, can feedback the voltage detection condition of battery pack to base station environment monitoring equipment, provide foundation for guaranteeing accurate and timely voltage early warning.

[0008] Preferably, the power module includes a transformer T1, a rectifier bridge H1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a step-down converter U1 of model MP2315GJ-Z, a resistor R1, a resistor R2 and a resistor R3;

[0009] The first end of the high-voltage side of the transformer T1 is connected with an AC 220V power supply, and the second end is grounded. The third end and the fourth end of the low-voltage side of the transformer T1 are connected with the first end and the second end of the rectifier bridge H1 in a one-to-one correspondence. The fourth end of the rectifier bridge H1 is connected with one end of the capacitor C1, one end of the capacitor C2 and the first end of the step-down converter U1, and serves as a first power supply end. The second end of the step-down converter U1 is connected with one end of the resistor R1. The other end of the resistor R1 is connected with one end of the resistor R2, one end of the capacitor C3 and one end of the resistor R3. The other end of the resistor R2 is connected with the other end of the capacitor C3 and one end of the capacitor C4, and serves as a second power supply end. The third end of the rectifier bridge H1 is connected with the other end of the capacitor C1, the other end of the capacitor C2, the third end of the step-down converter U1, the other end of the resistor R3 and the other end of the capacitor C4, and is grounded. The first power supply end is connected with the OC output module. The second power supply end is connected with the voltage acquisition module, the voltage signal amplification module, the voltage signal filter module and the OC output module.

[0010] The beneficial effects of the above preferred scheme are that the power module, after being connected to the mains, obtains 12V and 5V DC power supplies through the transformer and the step-down chip under the condition of ensuring filtering and buffer isolation, thereby providing a basis for the normal and stable operation of the voltage acquisition module, the voltage signal amplification module, the voltage signal filter module and the OC output module.

[0011] Preferably, the voltage acquisition module comprises a Hall voltage sensor U2 of model HVS-AS5, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, an inductor L1, an inductor L2, a capacitor C5 and a capacitor C6;

[0012] One end of the resistor R4 is connected to a positive voltage input terminal, and the positive electrode of the storage battery is connected to the other end of the resistor R4; the first end of the Hall voltage sensor U2 is connected to the other end of the resistor R4; the second end of the Hall voltage sensor U2 is connected to a negative voltage input terminal, and the negative electrode of the storage battery is connected to the second end of the Hall voltage sensor U2; the third end of the Hall voltage sensor U2 is connected to a second power supply terminal; the fourth end of the Hall voltage sensor U2 is grounded; the fifth end of the Hall voltage sensor U2 is connected to one end of the inductor L1; the other end of the inductor L1 is connected to one end of the resistor R5; the other end of the resistor R5 is connected to one end of the resistor R6 and one end of the capacitor C5, and is connected to the voltage signal amplification module as a first voltage acquisition terminal; the other end of the resistor R6 is connected to the other end of the capacitor C5 and grounded; the sixth end of the Hall voltage sensor U2 is connected to one end of the inductor L2; the other end of the inductor L2 is connected to one end of the resistor R7; the other end of the resistor R7 is connected to one end of the resistor R8 and one end of the capacitor C6, and is connected to the voltage signal amplification module as a second voltage acquisition terminal; the other end of the resistor R8 is connected to the other end of the capacitor C6 and grounded.

[0013] The Hall voltage sensor of model HVS-AS5 used in the voltage acquisition module has the characteristics of high precision, good linearity, low temperature drift, low response time and high anti-interference, and can accurately measure the voltage under the condition of electrical isolation, so as to obtain the voltage acquisition signal and provide a basis for accurately monitoring the voltage of the storage battery.

[0014] Preferably, the voltage signal amplification module comprises a resistor R9, a resistor R10, a resistor R11, an amplifier U3 of model AD620, a voltage follower U4 of model LM324, a capacitor C7 and a capacitor C8;

[0015] One end of the resistor R9 is connected with the first voltage collection end; the other end of the resistor R9 is connected with one end of the capacitor C7 and the first end of the amplifier U3 respectively; the other end of the capacitor C7 is grounded; one end of the resistor R10 is connected with the second voltage collection end; the other end of the resistor R10 is connected with one end of the capacitor C8 and the second end of the amplifier U3 respectively; the other end of the capacitor C8 is grounded; the fourth end of the amplifier U3 is connected with the second power supply end; one end of the resistor R11 is connected with the fifth end of the amplifier U3; the other end of the resistor R11 is connected with the sixth end of the amplifier U3; the seventh end of the amplifier U3 is connected with the eighth end and grounded; the third end of the amplifier U3 is connected with the second end of the voltage follower U4; the first end and the third end of the voltage follower U4 are connected, as a voltage signal amplification end, and are connected with a voltage signal filtering module; the fourth end of the voltage follower U4 is grounded; the fifth end of the voltage follower U4 is connected with the second power supply end.

[0016] The voltage signal amplification module has the advantages that the amplifier U3 with the model AD620 is adopted, the amplifier is a double-end input differential amplifier, has a high gain multiple, can significantly improve the common-mode rejection ratio of the operational amplifier circuit, and the voltage follower is arranged after the amplifier U3, so that the output impedance of the circuit is improved, and the output end of the amplifier is provided with isolation protection and voltage buffering.

[0017] Preferably, the voltage signal filtering module comprises resistors R12, R13, R14, R15 and a filtering chip U5 with the model LM324.

[0018] One end of the resistor R13 is connected with the voltage signal amplification end; the other end of the resistor R13 is connected with the second end of the filtering chip; one end of the resistor R12 is connected with the first end of the filtering chip U5 and one end of the resistor R14 respectively; the other end of the resistor R12 is grounded; the other end of the resistor R14 is connected with the third end of the filtering chip U5 and one end of the resistor R15 respectively; the fourth end of the filtering chip U5 is grounded; the fifth end of the filtering chip U5 is connected with the second power supply end; the other end of the resistor R15 is connected with an OC output module as a voltage signal filtering end.

[0019] The voltage signal filtering module has the advantages that a first-order low-pass filter is constructed based on the filtering chip U5, the hardware circuit noise and external interference generated by the voltage follower are effectively removed, and the voltage filtering signal matched with the I / O port of the MCU and the analog-to-digital converter is obtained.

[0020] Preferably, the OC output module comprises a microprocessor U6 of MSP430 type, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a triode Q1 and a triode Q2;

[0021] The 3rd pin of the microprocessor U6 is connected with a voltage signal filtering end; the 1st pin of the microprocessor U6 is connected with a second power supply end; the 11th pin of the microprocessor U6 is grounded; the 13th pin of the microprocessor U6 is connected with one end of the resistor R16; the other end of the resistor R16 is connected with the base of the triode Q1; the emitter of the triode Q1 is grounded; the collector of the triode Q1 is connected with one end of the resistor R17 and one end of the resistor R18 respectively; the other end of the resistor R18 is connected with the first power supply end; the other end of the resistor R17 is taken as a first OC output end and is connected with a base station environment monitoring device; the 15th pin of the microprocessor is connected with one end of the resistor R19; the other end of the resistor R19 is connected with the base of the triode Q2; the emitter of the triode Q2 is grounded; the collector of the triode Q2 is connected with one end of the resistor R20 and one end of the resistor R21 respectively; the other end of the resistor R21 is connected with the first power supply end; the other end of the resistor R20 is taken as a second OC output end and is connected with a base station environment monitoring device.

[0022] The microprocessor U6 of MSP430 type is adopted to receive a voltage filtering signal, and the voltage filtering signal is converted into digital signal based on the high-precision analog-to-digital converter inside the microprocessor, so that the accurate voltage of the battery pack is obtained, and the voltage is compared with the preset high voltage threshold value and low voltage threshold value respectively, so that the first OC switching quantity detection signal and the second OC switching quantity detection signal are obtained, the first OC switching quantity detection signal is output from the 13th pin of the microprocessor U6, so that the collector of the triode Q1 can output the first OC switching quantity detection signal through the resistor R17, and whether the battery pack voltage exceeds the high voltage threshold value is reflected, the second OC switching quantity detection signal is output from the 15th pin of the microprocessor U6, so that the collector of the triode Q2 can output the second OC switching quantity detection signal through the resistor R20, and whether the battery pack voltage does not reach the low voltage threshold value is reflected, so that the voltage monitoring alarm is further realized through the external EMUB on the basis of accurate monitoring of the battery pack voltage.

[0023] The other advantages of the application will be analyzed in detail in the subsequent examples. BRIEF DESCRIPTION OF DRAWINGS

[0024] In order to more clearly illustrate the technical solutions of the embodiments of the present invention, the following is a brief introduction to the drawings required for use in the embodiments. It should be understood that the following drawings only illustrate certain embodiments of the present invention and therefore should not be regarded as limiting the scope. For ordinary technicians in this field, other relevant drawings can be obtained based on these drawings without paying any creative work.

[0025] Figure 1 This is a block diagram of a voltage monitoring sensor in an embodiment of the present utility model.

[0026] Figure 2 This is a circuit diagram of the power module in the embodiment of the utility model.

[0027] Figure 3 This is a circuit diagram of the voltage acquisition module in an embodiment of the present utility model.

[0028] Figure 4 This is a circuit diagram of the voltage signal amplification module in an embodiment of the present utility model.

[0029] Figure 5 This is a circuit schematic diagram of the voltage signal filtering module in an embodiment of the present utility model.

[0030] Figure 6 This is a circuit diagram of the OC output module in an embodiment of the present utility model.

[0031] Figure 7 This is a schematic diagram of a voltage monitoring sensor used to monitor and feedback abnormal voltage of a battery pack of an RRU device in an embodiment of the present utility model. DETAILED DESCRIPTION

[0032] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, not all of the embodiments. The components of the embodiments of the present invention generally described and shown in the drawings herein can be arranged and designed in various different configurations. Therefore, the following detailed description of the embodiments of the present invention provided in the drawings is not intended to limit the scope of the claimed invention, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without making creative work are within the scope of protection of the present invention.

[0033] like Figure 1 As shown, in one embodiment of the present utility model, a voltage monitoring sensor is provided, comprising a power module, and a voltage acquisition module, a voltage signal amplification module, a voltage signal filtering module and an OC output module connected in sequence;

[0034] The power module supplies power for a voltage acquisition module, a voltage signal amplification module, a voltage signal filtering module and an OC output module.

[0035] As shown in Figure 2 The power module includes a transformer T1, a rectifier bridge H1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a step-down converter U1 with a model number of MP2315GJ-Z, a resistor R1, a resistor R2 and a resistor R3.

[0036] A first end of the high-voltage side of the transformer T1 is connected with an AC 220V power supply, and a second end is grounded; a third end and a fourth end of the low-voltage side of the transformer T1 are connected with a first end and a second end of the rectifier bridge H1 in a one-to-one correspondence; a fourth end of the rectifier bridge H1 is connected with one end of the capacitor C1, one end of the capacitor C2 and a first end of the step-down converter U1 respectively, and serves as a first power supply end; a second end of the step-down converter U1 is connected with one end of the resistor R1; the other end of the resistor R1 is connected with one end of the resistor R2, one end of the capacitor C3 and one end of the resistor R3 respectively; the other end of the resistor R2 is connected with the other end of the capacitor C3 and one end of the capacitor C4 respectively, and serves as a second power supply end; a third end of the rectifier bridge H1 is connected with the other end of the capacitor C1, the other end of the capacitor C2, a third end of the step-down converter U1, the other end of the resistor R3 and the other end of the capacitor C4 respectively, and is grounded; the first power supply end is connected with the OC output module; the second power supply end is connected with the voltage acquisition module, the voltage signal amplification module, the voltage signal filtering module and the OC output module respectively.

[0037] As shown in Figure 3 The voltage acquisition module includes a Hall voltage sensor U2 with a model number of HVS-AS5, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, an inductor L1, an inductor L2, a capacitor C5 and a capacitor C6.

[0038] One end of the resistor R4 is connected to the positive input terminal of the voltage, and the positive electrode of the storage battery is connected to the other end of the resistor R4; the first end of the Hall voltage sensor U2 is connected to the other end of the resistor R4; the second end of the Hall voltage sensor U2 is connected to the negative input terminal of the voltage, and the negative electrode of the storage battery is connected to the second end of the Hall voltage sensor U2; the third end of the Hall voltage sensor U2 is connected to the second power supply terminal; the fourth end of the Hall voltage sensor U2 is grounded; the fifth end of the Hall voltage sensor U2 is connected to one end of the inductor L1; the other end of the inductor L1 is connected to one end of the resistor R5; the other end of the resistor R5 is connected to one end of the resistor R6 and one end of the capacitor C5, and is connected to the first voltage acquisition terminal and the voltage signal amplification module; the other end of the resistor R6 is connected to the other end of the capacitor C5 and grounded; the sixth end of the Hall voltage sensor U2 is connected to one end of the inductor L2; the other end of the inductor L2 is connected to one end of the resistor R7; the other end of the resistor R7 is connected to one end of the resistor R8 and one end of the capacitor C6, and is connected to the second voltage acquisition terminal and the voltage signal amplification module; the other end of the resistor R8 is connected to the other end of the capacitor C6 and grounded.

[0039] As shown in Figure 4 , the voltage signal amplification module comprises a resistor R9, a resistor R10, a resistor R11, an amplifier U3 with a model number of AD620, a voltage follower U4 with a model number of LM324, a capacitor C7 and a capacitor C8.

[0040] One end of the resistor R9 is connected to the first voltage acquisition terminal; the other end of the resistor R9 is connected to one end of the capacitor C7 and the first end of the amplifier U3; the other end of the capacitor C7 is grounded; one end of the resistor R10 is connected to the second voltage acquisition terminal; the other end of the resistor R10 is connected to one end of the capacitor C8 and the second end of the amplifier U3; the other end of the capacitor C8 is grounded; the fourth end of the amplifier U3 is connected to the second power supply terminal; one end of the resistor R11 is connected to the fifth end of the amplifier U3; the other end of the resistor R11 is connected to the sixth end of the amplifier U3; the seventh end and the eighth end of the amplifier U3 are connected and grounded; the third end of the amplifier U3 is connected to the second end of the voltage follower U4; the first end and the third end of the voltage follower U4 are connected as the voltage signal amplification terminal and are connected to the voltage signal filtering module; the fourth end of the voltage follower U4 is grounded; the fifth end of the voltage follower U4 is connected to the second power supply terminal.

[0041] As shown in Figure 5 , the voltage signal filtering module comprises a resistor R12, a resistor R13, a resistor R14, a resistor R15 and a filtering chip U5 with a model number of LM324.

[0042] One end of the resistor R13 is connected with the voltage signal amplification end; the other end of the resistor R13 is connected with the 2nd end of the filter chip; one end of the resistor R12 is connected with the 1st end of the filter chip U5 and one end of the resistor R14 respectively; the other end of the resistor R12 is grounded; the other end of the resistor R14 is connected with the 3rd end of the filter chip U5 and one end of the resistor R15 respectively; the 4th end of the filter chip U5 is grounded; the 5th end of the filter chip U5 is connected with the second power supply end; the other end of the resistor R15 is connected with the OC output module as the voltage signal filtering end.

[0043] As shown in Figure 6 The OC output module comprises a microprocessor U6 of MSP430 type, resistors R16, R17, R18, R19, R20, R21, a triode Q1 and a triode Q2.

[0044] The 3rd pin of the microprocessor U6 is connected with the voltage signal filtering end; the 1st pin of the microprocessor U6 is connected with the second power supply end; the 11th pin of the microprocessor U6 is grounded; one end of the resistor R16 is connected with the 13th pin of the microprocessor U6; the other end of the resistor R16 is connected with the base of the triode Q1; the emitter of the triode Q1 is grounded; the collector of the triode Q1 is connected with one end of the resistor R17 and one end of the resistor R18 respectively; the other end of the resistor R18 is connected with the first power supply end; the other end of the resistor R17 is connected with the base station environment monitoring equipment EMUB as the first OC output end; one end of the resistor R19 is connected with the 15th pin of the microprocessor; the other end of the resistor R19 is connected with the base of the triode Q2; the emitter of the triode Q2 is grounded; the collector of the triode Q2 is connected with one end of the resistor R20 and one end of the resistor R21 respectively; the other end of the resistor R21 is connected with the first power supply end; the other end of the resistor R20 is connected with the base station environment monitoring equipment EMUB as the second OC output end.

[0045] The utility model discloses a working principle for: the utility model provides a kind of voltage monitoring sensor, by power module external 220V alternating voltage, and the direct current power supply voltage of 12V and 5V is obtained by alternating voltage buck rectification, output 12V voltage by first power supply end, output 5V voltage by second power supply end;With the other end of resistance R18 and the other end of resistance R21 respectively by the first power supply end of power module is connected, guarantee that OC output is 12V or 0V, for the external EMUB carries out battery pack voltage monitoring early warning and provides foundation;With the 3rd end of hall voltage sensor U2, the 5th end of voltage follower U4, the 5th end of filter chip U5 and the 1st pin of microprocessor U6 respectively by second power supply end is connected, guarantee that voltage acquisition module, voltage signal amplification module, voltage signal filter module and OC output module are normally stable work;With the positive pole of battery pack by one end of resistance R4, the negative pole of battery pack by the 2nd end of hall voltage sensor U2, the voltage acquisition signal of battery pack is obtained, and after filtering and voltage isolation, with the one end of resistance R9 by the other end of resistance R7 is connected, voltage acquisition signal is output to voltage signal amplification module;After being amplified by the double-end input differential amplifier of AD620, voltage amplification signal is obtained, the output end of amplifier is protected and voltage buffer by voltage follower of LM324, guarantee the stability of voltage sensor;With the one end of resistance R13 by the 3rd end of voltage follower U4 is connected, voltage amplification signal is transmitted to voltage signal filter module, after voltage amplification signal is filtered by first-order filter, effectively filter out hardware noise and external interference, and obtain voltage filter signal;With the 3rd pin of microprocessor U6 by the other end of resistance R15 is connected, and voltage filter signal is input to OC output module;After high-precision analog-digital conversion of voltage filter signal by microprocessor U6, compare with preset high voltage threshold and low voltage threshold respectively, and according to the comparison result with voltage threshold, 12V / 0V OC switch quantity detection signal is output to the base station environment monitoring equipment EMUB that is externally connected by first OC output end and second OC output end, wherein, if voltage exceeds high voltage threshold, the 13th pin of microprocessor U6 is low level, i.e. the voltage of first OC output end is 12V;If voltage does not exceed high voltage threshold, the 13th pin of microprocessor U6 is high level, i.e. the voltage of first OC output end is 0V;If voltage is not lower than low voltage threshold, the 15th pin of microprocessor U6 is high level, i.e. the voltage of second OC output end is 0V;If voltage is lower than low voltage threshold, the 15th pin of microprocessor U6 is low level, then the voltage of second OC output end is 12V.

[0046] As Figure 7As shown, in one practical example of the utility model, the voltage monitoring sensor provided by the utility model is used for monitoring the voltage of the battery of the RRU equipment for the UPS host, the voltage detection sensor of the scheme is started through the external 220V power supply, and the positive electrode and the negative electrode of the battery pack are connected one by one through the voltage positive input end and the voltage negative input end of the voltage acquisition module respectively, the voltage acquisition signal of the battery pack is obtained, and after being amplified by the voltage signal amplification module and filtered by the voltage signal filtering module in turn, in the OC output module, the monitored voltage is compared with the high voltage threshold value and the low voltage threshold value respectively, when the detected voltage exceeds the high voltage threshold value, the other end of the resistance R17 is connected with the first on-off quantity signal detection interface of the base station environment monitoring equipment EMUB, 12V voltage is output, high voltage abnormal OC early warning signal is transmitted, when the detected voltage is lower than the low voltage threshold value, the other end of the resistance R20 is connected with the second on-off quantity signal detection interface of the base station environment monitoring equipment EMUB, 12V voltage is output, low voltage abnormal OC early warning signal is transmitted, and the base station environment monitoring equipment EMUB is connected with the base station BSC network management, so that the high voltage abnormal OC early warning signal or / low voltage abnormal OC early warning signal can be transmitted to the base station BSC network management, and the battery voltage monitoring and early warning of the RRU equipment can be realized in time and accurately.

[0047] In specific cases, the base station environment monitoring equipment EMUB can be connected with a plurality of voltage monitoring sensors for monitoring the battery pack of different RRU equipment according to specific conditions, so as to monitor and feed back the voltage abnormality of the battery pack at different base stations. At the same base station, a plurality of voltage monitoring sensors can also be used to monitor and feed back the voltage abnormality of the battery pack of the main RRU equipment and the standby RRU equipment respectively.

[0048] In the embodiment, the UPS (Uninterruptible Power Supply) host is an existing device, and its full name is uninterrupted power supply host. The UPS host is a device capable of connecting the battery with the host equipment to provide stable and uninterrupted power supply for computers or electronic equipment. The UPS host is usually composed of a battery pack, an inverter, a rectifier, a static switch and a control system. The working principle of the UPS host is to convert alternating current into direct current, and then convert the direct current into alternating current to provide stable power supply. The specific working process of the UPS host is as follows: the battery power supply is converted into direct current through the rectifier; the direct current is charged through the battery to provide standby power supply when the power is off or the voltage fluctuates; when the input power supply is interrupted or the voltage is abnormal, the UPS starts the inverter to convert the direct current into alternating current to supply to the equipment connected to the UPS, i.e. the RRU equipment; the static switch is used to automatically switch to the standby power supply when the input battery power supply fails, to ensure uninterrupted power supply of the RRU equipment.

[0049] In the embodiment, the base station environment monitoring device EMUB (Environment Monitoring Unit type B) is an important component in the base station for monitoring environmental variables in the cabinet, processing alarms and other functions, and is an existing device. The EMUB supports 32-way switch quantity signal detection interfaces, which can be connected to cable terminals; the switch quantity signal detection interface includes S1-S32 paths, all interfaces support dry contact and OC mode switch quantity signal input, among them, S13-S16, S29-S32 path interfaces can support voltage output type switch quantity signal input, the first switch quantity signal detection interface and the second switch quantity signal detection interface in the embodiment are any two interfaces in the S13-S16, S29-S32 path interfaces.

[0050] In the embodiment, the base station BSC network management is an existing device, and the base station BSC (Base Station Controller) network management refers to a series of operations and tools for network management of the base station controller. The base station controller plays a crucial role in the mobile communication network, responsible for managing and controlling multiple base stations, including call management, frequency management, power control and other functions. The BSC is also responsible for scheduling resources, optimizing network performance, and interacting with other systems (such as the core network). The base station BSC gateway in the scheme can further customize the alarm level, alarm type, alarm site location information, alarm occurrence time and alarm recovery time for the high-voltage abnormal OC early warning signal or / low-voltage abnormal OC early warning signal uploaded by the voltage monitoring sensor through the base station environment monitoring device EMBU, thereby further realizing the management of the voltage monitoring alarm results of the battery pack of the RUU device.

[0051] The above is only a specific embodiment of the present application, but the protection scope of the present application is not limited thereto, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the present application, which should be covered within the protection scope of the present application.

Claims

1. A voltage monitoring sensor, characterized in that: It includes a power supply module, and a voltage acquisition module, a voltage signal amplification module, a voltage signal filtering module and an OC output module connected in sequence; The power supply module supplies power to the voltage acquisition module, the voltage signal amplification module, the voltage signal filtering module and the OC output module; The OC output module includes a microprocessor U6 of model MSP430, a resistor R16, a resistor R17, a resistor R18, a resistor R19, a resistor R20, a resistor R21, a transistor Q1 and a transistor Q2; The third pin of the microprocessor U6 is connected to the voltage signal filter terminal; the first pin of the microprocessor U6 is connected to the second power supply terminal; the 11th pin of the microprocessor U6 is grounded; the 13th pin of the microprocessor U6 is connected to one end of the resistor R16; the other end of the resistor R16 is connected to the base of the transistor Q1; the emitter of the transistor Q1 is grounded; the collector of the transistor Q1 is respectively connected to one end of the resistor R17 and one end of the resistor R18; the other end of the resistor R18 is connected to the first power supply terminal ; The other end of the resistor R17 serves as a first OC output end, which is externally connected to a base station environment monitoring device; Pin 15 of the microprocessor is connected to one end of a resistor R19; the other end of the resistor R19 is connected to the base of the transistor Q2; the emitter of the transistor Q2 is grounded; the collector of the transistor Q2 is respectively connected to one end of a resistor R20 and one end of a resistor R21; the other end of the resistor R21 is connected to a first power supply end; the other end of the resistor R20 serves as a second OC output end, which is externally connected to a base station environment monitoring device.

2. The voltage monitoring sensor according to claim 1, characterized in that: The power supply module includes a transformer T1, a rectifier bridge H1, a capacitor C1, a capacitor C2, a capacitor C3, a capacitor C4, a buck converter U1 of model MP2315GJ-Z, a resistor R1, a resistor R2 and a resistor R3; The first end of the high-voltage side of the transformer T1 is connected to an external AC 220V power supply, and the second end is grounded; the third and fourth ends of the low-voltage side of the transformer T1 are connected to the first and second ends of the rectifier bridge H1 in a one-to-one correspondence; the fourth end of the rectifier bridge H1 is respectively connected to one end of the capacitor C1, one end of the capacitor C2 and the first end of the buck converter U1, and serves as the first power supply end; the second end of the buck converter U1 is connected to one end of the resistor R1; the other end of the resistor R1 is respectively connected to one end of the resistor R2, one end of the capacitor C3 and one end of the resistor R3; The other end of the resistor R2 is respectively connected to the other end of the capacitor C3 and one end of the capacitor C4, and serves as the second power supply end; the third end of the rectifier bridge H1 is respectively connected to the other end of the capacitor C1, the other end of the capacitor C2, the third end of the buck converter U1, the other end of the resistor R3 and the other end of the capacitor C4, and is grounded; the first power supply end is respectively connected to the other end of the resistor R18 and the other end of the resistor R21; the second power supply end is respectively connected to the voltage acquisition module, the voltage signal amplification module, the voltage signal filtering module and the first pin of the microprocessor U6.

3. The voltage monitoring sensor according to claim 2, characterized in that: The voltage acquisition module includes a Hall voltage sensor U2 of model HVS-AS5, a resistor R4, a resistor R5, a resistor R6, a resistor R7, a resistor R8, an inductor L1, an inductor L2, a capacitor C5 and a capacitor C6; One end of the resistor R4 is connected to the positive terminal of the battery pack; the other end of the resistor R4 is connected to the first end of the Hall voltage sensor U2; the second end of the Hall voltage sensor U2 is connected to the negative terminal of the battery pack; the third end of the Hall voltage sensor U2 is connected to the second power supply terminal; the fourth end of the Hall voltage sensor U2 is grounded; the fifth end of the Hall voltage sensor U2 is connected to one end of the inductor L1; the other end of the inductor L1 is connected to one end of the resistor R5; the other end of the resistor R5 is connected to the inductor L1 and the inductor L1. One end of the resistor R6 is connected to one end of the capacitor C5, and is connected to the voltage signal amplification module as a first voltage collection end; the other end of the resistor R6 is connected to the other end of the capacitor C5 and is grounded; the sixth end of the Hall voltage sensor U2 is connected to one end of the inductor L2; the other end of the inductor L2 is connected to one end of the resistor R7; the other end of the resistor R7 is respectively connected to one end of the resistor R8 and one end of the capacitor C6, and is connected to the voltage signal amplification module as a second voltage collection end; the other end of the resistor R8 is connected to the other end of the capacitor C6 and is grounded.

4. The voltage monitoring sensor according to claim 2, characterized in that: The voltage signal amplification module includes a resistor R9, a resistor R10, a resistor R11, an amplifier U3 of model AD620, a voltage follower U4 of model LM324, a capacitor C7 and a capacitor C8; One end of the resistor R9 is connected to the first voltage acquisition end; the other end of the resistor R9 is respectively connected to one end of the capacitor C7 and the first end of the amplifier U3; the other end of the capacitor C7 is grounded; one end of the resistor R10 is connected to the second voltage acquisition end; the other end of the resistor R10 is respectively connected to one end of the capacitor C8 and the second end of the amplifier U3; the other end of the capacitor C8 is grounded; the fourth end of the amplifier U3 is connected to the second power supply end; the fifth end of the amplifier U3 is connected to one end of the resistor R11; the other end of the resistor R11 is connected to the sixth end of the amplifier U3; the seventh end and the eighth end of the amplifier U3 are connected and grounded; the third end of the amplifier U3 is connected to the second end of the voltage follower U4; the first end and the third end of the voltage follower U4 are connected as the voltage signal amplification end and are connected to the voltage signal filtering module; the fourth end of the voltage follower U4 is grounded; and the fifth end of the voltage follower U4 is connected to the second power supply end.

5. The voltage monitoring sensor according to claim 4, characterized in that: The voltage signal filter module includes a resistor R12, a resistor R13, a resistor R14, a resistor R15 and a filter chip U5 of model LM324; One end of the resistor R13 is connected to the voltage signal amplifying end; the other end of the resistor R13 is connected to the second end of the filter chip; one end of the resistor R12 is respectively connected to the first end of the filter chip U5 and one end of the resistor R14; the other end of the resistor R12 is grounded; the other end of the resistor R14 is respectively connected to the third end of the filter chip U5 and one end of the resistor R15; the fourth end of the filter chip U5 is grounded; the fifth end of the filter chip U5 is connected to the second power supply end; the other end of the resistor R15 is connected to the third pin of the microprocessor U6 as the voltage signal filtering end.

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