CN209313530U - A kind of alternating current monitoring unit - Google Patents
A kind of alternating current monitoring unit Download PDFInfo
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- CN209313530U CN209313530U CN201920214391.5U CN201920214391U CN209313530U CN 209313530 U CN209313530 U CN 209313530U CN 201920214391 U CN201920214391 U CN 201920214391U CN 209313530 U CN209313530 U CN 209313530U
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- 238000012544 monitoring process Methods 0.000 title claims abstract description 20
- 239000003990 capacitor Substances 0.000 claims description 35
- 230000000087 stabilizing effect Effects 0.000 claims description 17
- 230000005611 electricity Effects 0.000 claims description 11
- 230000004044 response Effects 0.000 abstract description 6
- 239000008280 blood Substances 0.000 description 7
- 210000004369 blood Anatomy 0.000 description 7
- 238000004140 cleaning Methods 0.000 description 7
- 230000003111 delayed effect Effects 0.000 description 3
- 238000001514 detection method Methods 0.000 description 3
- 238000010586 diagram Methods 0.000 description 3
- 238000005070 sampling Methods 0.000 description 3
- 238000001914 filtration Methods 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 239000000463 material Substances 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000007958 sleep Effects 0.000 description 2
- 241000208340 Araliaceae Species 0.000 description 1
- 235000005035 Panax pseudoginseng ssp. pseudoginseng Nutrition 0.000 description 1
- 235000003140 Panax quinquefolius Nutrition 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000000502 dialysis Methods 0.000 description 1
- 235000008434 ginseng Nutrition 0.000 description 1
- 238000009434 installation Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 238000011084 recovery Methods 0.000 description 1
- 230000006641 stabilisation Effects 0.000 description 1
- 238000011105 stabilization Methods 0.000 description 1
- 239000000758 substrate Substances 0.000 description 1
Classifications
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B70/00—Technologies for an efficient end-user side electric power management and consumption
- Y02B70/30—Systems integrating technologies related to power network operation and communication or information technologies for improving the carbon footprint of the management of residential or tertiary loads, i.e. smart grids as climate change mitigation technology in the buildings sector, including also the last stages of power distribution and the control, monitoring or operating management systems at local level
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02B—CLIMATE CHANGE MITIGATION TECHNOLOGIES RELATED TO BUILDINGS, e.g. HOUSING, HOUSE APPLIANCES OR RELATED END-USER APPLICATIONS
- Y02B90/00—Enabling technologies or technologies with a potential or indirect contribution to GHG emissions mitigation
- Y02B90/20—Smart grids as enabling technology in buildings sector
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/12—Energy storage units, uninterruptible power supply [UPS] systems or standby or emergency generators, e.g. in the last power distribution stages
-
- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y04—INFORMATION OR COMMUNICATION TECHNOLOGIES HAVING AN IMPACT ON OTHER TECHNOLOGY AREAS
- Y04S—SYSTEMS INTEGRATING TECHNOLOGIES RELATED TO POWER NETWORK OPERATION, COMMUNICATION OR INFORMATION TECHNOLOGIES FOR IMPROVING THE ELECTRICAL POWER GENERATION, TRANSMISSION, DISTRIBUTION, MANAGEMENT OR USAGE, i.e. SMART GRIDS
- Y04S20/00—Management or operation of end-user stationary applications or the last stages of power distribution; Controlling, monitoring or operating thereof
- Y04S20/20—End-user application control systems
- Y04S20/248—UPS systems or standby or emergency generators
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Abstract
The utility model proposes a kind of alternating current monitoring units, including rectifier, comparator, first timer and o controller；Monitored exchange is electrically connected the input terminal of the rectifier, the sine wave of alternating current is rectified into half-wave by the rectifier, the first input end of the output end connection comparator of the rectifier, second input terminal of the comparator connects reference voltage output terminal, the output end of the comparator connects first timer input terminal, the first timer output end connects the o controller, the connection of the control terminal of the o controller output end and Backup Power Switch, controls opening and closing for the Backup Power Switch.The alternating current monitoring unit is directly compared alternating current peak value, response speed greatly improved, as long as AC power source has half period exception occur, which can respond immediately without converting alternating current to direct current.
Description
Technical field
The utility model relates to medical instruments fields, and in particular to a kind of alternating current monitoring unit.
Background technique
Have much to the detection technique of power grid at present, most of is all that AC rectification is filtered into direct current, then right
It is compared, and DirectCurrent Voltage Ratio reference voltage is low, starts backup power source；Or using microprocessor with the speed of Microsecond grade
Degree to AC signal carry out high-speed sampling, then by the hundreds of data sampled carry out data processing, then with setting
Threshold value is compared, and is less than threshold value, is then started backup power source.
AC rectification is filtered into direct current, then it is compared, filtering all be unable to do without capacitor, when alternating current stops
When electric, the capacitor of filtering discharges, and both end voltage slowly reduces, and has seriously affected city's electro-detection response speed, blood cleaning equipment
Operating current is big, and stability requirement is high, if alternating current cannot detect in time when powering off and be switched to backup power source, will lead to blood
Cleaning equipment shutdown is restarted or is resetted, and brings life threat to patient.
High-speed sampling is carried out to AC signal using microprocessor, then carries out data processing, although response speed meets
It requires, but 1 microprocessor is needed individually to sample and data processing, if there are also other functions to need to use micro- place for system
In addition managing device to guarantee response speed can only then add 1 processor, cause circuit system complexity and it is at high cost the disadvantages of.
Utility model content
In order to overcome above-mentioned defect existing in the prior art, the purpose of the utility model is to provide it is a kind of can be quickly to city
The alternating current monitoring unit that piezoelectric voltage is monitored.
In order to realize the above-mentioned purpose of the utility model, the utility model provides a kind of alternating current monitoring unit, including whole
Flow device, comparator, first timer and o controller；
Monitored exchange is electrically connected the input terminal of the rectifier, and the sine wave of alternating current is rectified into half by the rectifier
Wave, the first input end of the output end connection comparator of the rectifier, the second input terminal connection of the comparator is with reference to electricity
Output end is pressed, the output end of the comparator connects first timer input terminal, when the electricity that the first input end of comparator inputs
It forces down when reference voltage, first timer starts timing, when the voltage that the first input end of comparator inputs is higher than with reference to electricity
When pressure, first timer timing is reset, and the first timer output end connects the o controller, the o controller
The connection of the control terminal of output end and Backup Power Switch, controls opening and closing for the Backup Power Switch.
The alternating current monitoring unit is directly compared alternating current peak value, substantially without converting alternating current to direct current
Response speed is improved, as long as AC power source has half period exception occur, which can make sound immediately
It answers.
It further, further include that backup power source delay disconnects timer, the backup power source delay disconnects timer input
End connects the first timer output end, and the backup power source delay disconnects timer output end and connects the o controller
Input terminal.After city power recovery is normal, since the filter capacitor inside power supply adaptor needs to charge, stabilization cannot be exported immediately
Direct current, the utility model disconnects one section of timer delay using backup power source delay after detecting that alternating current restores normal
Backup power source is disconnected after time again, ensure that the stability of power supply for electrical equipment.
Further, the reference voltage is provided by hysteresis adjustable reference source, and the first timer output end is also connected with
To hysteresis adjustable reference source input terminal.There are two functions in hysteresis adjustable reference source, and first function is that reference voltage is adjustable,
Realize that the starting voltage of backup power source is adjusted by adjusting reference voltage, second function is the output electricity by first timer
Flat variation, which is realized, is fixed adjusting to reference voltage, realizes that corresponding alternating voltage and closing are spare when starting backup power source
Corresponding ac voltage is different when power supply, and to prevent alternating voltage in the critical point that backup power source starts, backup power source is anti-
Multiple starting and closing, i.e. hysteresis.
Further, the o controller is also connect with the master control system of electrical equipment, the master control of the electrical equipment
System sends electrical equipment working condition to the o controller.
Further, the first timer includes timing chip, three pole of timing resistor, timing capacitor and the second positive-negative-positive
Pipe；
The comparator output terminal connects the triggering end of the timing chip, the discharge end and threshold value of the timing chip
End is connected to first end, the first end of timing capacitor of the timing resistor, and the second end of the timing resistor is connected to 5V
Power supply, the second end ground connection of the timing capacitor, the emitter of second PNP type triode connect the of the timing capacitor
One end, the collector of second PNP type triode connect the second end of the timing capacitor, second PNP type triode
Base stage connect the output end of the comparator, the output end of the timing chip is connected to the o controller.This first
Timer circuit structure is simple, and production cost is low.
Further, it includes the 5th resistance, the second capacitor and third positive-negative-positive that the backup power source delay, which disconnects timer,
Triode；
The first timer output end connects the base stage of the third PNP type triode, the third PNP type triode
Grounded collector, emitter connects one end of second capacitor and one end of the 5th resistance, second capacitor
The other end of other end ground connection, the 5th resistance connects 5V power supply, and the emitter of the third PNP type triode is additionally coupled to
The o controller.Backup power source delay disconnection timer circuit structure is simple, and production cost is low.
Further, the o controller includes NAND gate；
The first timer output end connects the first input end of the NAND gate, the third PNP type triode
Emitter connects the second input terminal of the NAND gate, the control terminal of the output end connection Backup Power Switch of the NAND gate.
The control opened and closed to Backup Power Switch is realized using a NAND gate, so that circuit is more succinct, and low in cost.
Further, the o controller further includes and door, the output end connection of the NAND gate the with door
One input terminal, the electrical equipment working state output terminal of the master control system that electrical equipment is connect with the second input terminal of door,
The control terminal that Backup Power Switch is connect with the output end of door.Work as electrical equipment, such as blood cleaning equipment, in sleep or
Standby mode when mains failure, does not need starting backup power source.The utility model by by with the second input terminal of door and electricity consumption
The master control system of equipment connects, and to the working condition for sending electrical equipment with door, realizes whether start backup power source by master control control
System.
Further, hysteresis adjustable reference source includes reference voltage stabilizing source, diode, adjustable rheostat and the first NPN
Type triode；
The cathode of the reference voltage stabilizing source connects the positive terminal of the comparator, and the positive terminal of the comparator is also connected with
3rd resistor, the 3rd resistor are connected to 5V power supply, and the anode of the reference voltage stabilizing source is being separately connected the diode just
Pole, described adjustable rheostatic coil one end, first NPN type triode collector；The reference of the reference voltage stabilizing source
Pole connects the adjustable rheostatic adjustable side, and the adjustable rheostatic coil other end connects the positive of the comparator
End, the base stage of first NPN type triode connect the output end of the first timer, first NPN type triode
The cathode of emitter and diode ground connection.Using the hysteresis adjustable reference source circuit, once alternating current is lower than a reference value of setting, touching
After sending out and starting spare backup power source, a reference value will be increased automatically, prevent from switching repeatedly, prevent monitored alternating voltage
In the critical point of backup power source starting, backup power source switchs repeatedly.
The beneficial effects of the utility model are: the alternating current monitoring unit is without converting alternating current to direct current, it is directly right
Alternating current peak value is compared, and response speed greatly improved, as long as AC power source has half period exception occur, can be stood
It responds, compared to the mode of microprocessor samples, the utility model circuit is more succinct, and low in cost.
3, reference adjustment circuit has also been devised in the utility model, realizes adjustable to the setting value of starting backup power source.
The additional aspect and advantage of the utility model will be provided in following description section, partially will from the following description
Become obvious, or is recognized by the practice of the utility model.
Detailed description of the invention
The above-mentioned and/or additional aspect and advantage of the utility model from the description of the embodiment in conjunction with the following figures will
Become obvious and be readily appreciated that, in which:
Fig. 1 is the principles of the present invention block diagram；
Fig. 2 is the circuit diagram of the utility model；
Fig. 3 is the rectification of alternating current, compares waveform diagram.
Specific embodiment
The embodiments of the present invention are described below in detail, examples of the embodiments are shown in the accompanying drawings, wherein from beginning
Same or similar element or element with the same or similar functions are indicated to same or similar label eventually.Below by ginseng
The embodiment for examining attached drawing description is exemplary, and is only used for explaining the utility model, and should not be understood as to the utility model
Limitation.
In the description of the present invention, unless otherwise specified and limited, it should be noted that term " installation ", " phase
Even ", " connection " shall be understood in a broad sense, for example, it may be mechanical connection or electrical connection, the company being also possible to inside two elements
It is logical, it can be directly connected, can also indirectly connected through an intermediary, for the ordinary skill in the art, it can
To understand the concrete meaning of above-mentioned term as the case may be.
As shown in Figure 1, the utility model provides a kind of alternating current monitoring unit, including rectifier D1, comparator U2A,
One timer and o controller.
Monitored exchange is electrically connected the input terminal of the rectifier D1, and the rectifier D1 rectifies the sine wave of alternating current
At half-wave, the first input end of the output end connection comparator U2A of the rectifier D1, the second input of the comparator U2A
End connection reference voltage output terminal, reference voltage here are provided by hysteresis adjustable reference source, the first timer output end
It is additionally coupled to hysteresis adjustable reference source input terminal.
The output end of the comparator U2A connects first timer input terminal, and the first timer output end connects institute
O controller is stated, the control terminal connection of the o controller output end and Backup Power Switch controls the backup power source
Switch opens and closes.
After monitored exchange electrical connection rectifier D1, as shown in figure 3, rectifier D1 is by the sine wave of monitored alternating current
(A waveform) is converted into half-wave (B waveform), and rectifier D1 is connected to comparator U2A, and comparator U2A is to half-wave and hysteresis adjustable substrate
Quasi- source (Ref of B waveform) is compared, and comparator U2A is connected to first timer, and first timer is exchange electro-detection timing
Device, when sampling voltage signal is greater than reference voltage signal, comparator U2A exports low level, on the contrary then export high level, such as Fig. 3
C waveform, when comparator U2A export high level when, first timer starts timing, when comparator U2A export low level when, clearly
The timing time of zero first timer, first timer exports high level to o controller, while the output of first timer
It is also connected to hysteresis adjustable reference source.
There are two functions in hysteresis adjustable reference source, and first function is that reference voltage is adjustable, by adjusting reference voltage reality
The starting voltage of existing backup power source is adjusted, and second function is to be realized by the variation of the output level of timer 1 to benchmark electricity
Pressure carries out secured adjusted, realizes corresponding alternating voltage when corresponding alternating voltage is with closing backup power source when starting backup power source
Value is different, and to prevent alternating voltage in the critical point that backup power source starts, backup power source starts and closes repeatedly, i.e. hysteresis.
When inputting 220V alternating current to power adapter, there are many filter capacitors inside power adapter, can not stand
Export stable DC.Therefore backup power source cannot be disconnected after alternating current is normal immediately by detecting, when needing to postpone one section
Between after disconnect again, therefore the preferred embodiment as the present embodiment, the alternating current monitoring unit further includes that backup power source delay disconnects meter
When device, i.e., delay disconnect backup power source timer, with realize backup power source delay disconnect purpose.
The output end of first timer is connected to the input terminal that backup power source delay disconnects timer, and the backup power source prolongs
Timer output end is disconnected late connects the o controller input terminal.When reaching setting time between first timer timing,
First timer output becomes low level, and low level signal makes backup power source delay disconnection timer output high level be given to output
Controller, output controller controls Backup Power Switch disconnect.
O controller is also connect with the master control system of electrical equipment, and the master control system of the electrical equipment is to the output
Controller sends electrical equipment working condition, and the only master control system of electrical equipment sends enable signal, and output control module is
Output is ready for use, and power supply delay disconnects the state of timer, is just able to achieve the backup power source of starting electrical equipment.At electrical equipment
When working condition, the master control system of electrical equipment exports enable signal, and when electrical equipment, which is in, sleeps or is standby, electricity consumption is set
Standby master control system does not send enable signal, monitors not start backup power source then when exchange electrical anomaly at this time.Here electricity consumption
Equipment is preferably but not limited to as blood cleaning equipment.
Specifically, rectifying as shown in Fig. 2, monitored alternating current is input to the 2 of rectifier D1,4 feet by the first connector J1
1 foot of device D1 is grounded, and 3 feet export half-wave, and as shown in the B waveform of Fig. 3,3 feet of rectifier D1 are exported through first resistor R1, second
Resistance R2 is divided, and the inverting input terminal of comparator U2A is sent into after scale smaller, is compared with the reference voltage of in-phase end, than
First timer input terminal, the voltage ratio that comparator U2A is preferably but not limited to as model LM393 are connected compared with device U2A output end
Compared with device.
Here reference voltage is provided by hysteresis adjustable reference source, which includes reference voltage stabilizing source U1, two
Pole pipe D2, adjustable rheostat RP1 and the first NPN type triode Q1, reference voltage stabilizing source U1 are preferably but not limited to as model TL431
Source of stable pressure.
The cathode of the reference voltage stabilizing source U1 connects the positive terminal of the comparator U2A, the positive terminal of the comparator U2A
It is also connected with 3rd resistor R3, the 3rd resistor R3 is connected to 5V power supply, and the anode of the reference voltage stabilizing source U1 is separately connected
Coil one end of positive, the described adjustable rheostat RP1 of the diode D2, the first NPN type triode Q1 collector；
The reference pole of the reference voltage stabilizing source U1 connects the adjustable side of the adjustable rheostat RP1, the coil of the adjustable rheostat RP1
The other end connects the positive terminal of the comparator U2A, and the base stage of the first NPN type triode Q1 connects the first timer
Output end, the cathode ground connection of the emitter of the first NPN type triode Q1 and diode D2.
First timer includes timing chip U3, timing resistor R4, timing capacitor C1 and the second PNP type triode Q2, is determined
When chip U3 be preferably but not limited to as the chip of model NE555.
The comparator U2A output end connects the triggering end of the timing chip U3, the discharge end of the timing chip U3
It is connected to the first end of the timing resistor R4, the first end of timing capacitor C1 with threshold value end, the timing resistor R4's
Second end is connected to 5V power supply, the second end ground connection of the timing capacitor C1, and the emitter of the second PNP type triode Q2 connects
The first end of the timing capacitor C1 is connect, the collector of the second PNP type triode Q2 connects the of the timing capacitor C1
The base stage at two ends, the second PNP type triode Q2 connects the output end of the comparator U2A, and the timing chip U3's is defeated
Outlet is connected to the o controller.
It includes the 5th resistance R5, the second capacitor C2 and third PNP type triode that the backup power source delay, which disconnects timer,
Q3。
The first timer output end connects the base stage of the third PNP type triode Q3, three pole of third positive-negative-positive
The grounded collector of pipe Q3, emitter connect one end of the second capacitor C2 and one end of the 5th resistance R5, and described
The other end of two capacitor C2 is grounded, and the other end of the 5th resistance R5 connects 5V power supply, the third PNP type triode Q3's
Emitter is additionally coupled to the o controller.
The o controller includes NAND gate U4A, and the first timer output end connects the of the NAND gate U4A
One input terminal, the emitter of the third PNP type triode Q3 connect the second input terminal of the NAND gate U4A, it is described with it is non-
The output end connection Backup Power Switch control terminal or first input end with door U5A of door U4A, it is described second defeated with door U5A
Enter the blood cleaning equipment working state output terminal of end connection blood cleaning equipment master control system, the output end with door U5A
Connect the control terminal of Backup Power Switch.
5V power supply is powered after 3rd resistor R3 current limliting to reference voltage stabilizing source U1, and reference voltage stabilizing source U1 is adjustable according to being connected to
The voltage of the reference pole of rheostat RP1 adjusts its cathode voltage, so that comparator U2A does benchmark, the first NPN type when original state
The base stage of triode Q1 is high level, and the first NPN type triode Q1 is on state, the collector of the first NPN type triode Q1
With the resistance very little of emitter, can be neglected, the anode of reference voltage stabilizing source U1 can be considered ground connection, when comparator U2A reverse side
Voltage it is higher than the voltage of in-phase end when, comparator U2A exports low level, on the contrary then export high level.When comparator U2A is exported
When for low level, the second PNP type triode Q2 conducting is discharged to timing capacitor C1, simultaneously because comparator U2A output end also connects
Double triggering ends for arriving timing chip U3 are connect, therefore the triggering end of timing chip U3 is set low, the output of timing chip U3 output end is high
Level, when comparator U2A exports high level, the second PNP type triode Q2 cut-off stops the electric discharge to timing capacitor C1, fixed
When capacitor C1 charged by+5V power supply by timing resistor R4, timing capacitor C1 voltage be charged to setting voltage value when, such as
3.3V, i.e. timing are arrived, and the output end of timing chip U3 exports low level, i.e., monitored AC supply voltage is through scale smaller
Afterwards, lower than the reference voltage of setting and the timing beyond setting of holding time.
Here it is divided into two kinds of situations, one kind not considering the situation that is delayed, and one is consider the situation that is delayed.
When do not consider be delayed situation when, the output end of timing chip U3 is connect with o controller, o controller according to
The high and low level control Backup Power Switch of the output end output of timing chip U3 opens and closes.
When in view of delay situation, the output end of timing chip U3 just postpones disconnection timer with backup power source and connect.
When the output end of timing chip U3 exports low level, the third PNP type triode Q3 for being connected to timing chip U3 output end is led
It is logical, it discharges to the second capacitor C2, it is low for being connected to the first input end of the NAND gate U4A of third PNP type triode Q3 emitter
Second input terminal of level, NAND gate U4A is connected directly between on the output end of timing chip U3, is similarly low level, NAND gate
The output end of U4A exports high level.
When the output end of NAND gate U4A connects Backup Power Switch control terminal, directly by the output result of NAND gate U4A
The opening and closing of Backup Power Switch is controlled, the output end of NOT gate U4A exports high level here, opens Backup Power Switch.When with door
When the output end of the first input end connection NAND gate U4A of U5A, the output end output of NOT gate U4A is high level here, with door
The second input terminal of U5A passes through the connection enable end EN of the second connector J2, which is controlled by dialysis machine master control system, defeated
Blood cleaning equipment working condition out, such as at this time enable end EN be high level, then with the output end output state of door U5A according to
The output end of NOT gate U4A changes, and exports high level, by 3 feet of the second connector J2, opens Backup Power Switch；As at this time
Enable end EN is low level, then keeps output low level with the output end of door U5A, can not open Backup Power Switch.
The output end of timing chip U3 is also connected to the base stage of the first NPN type triode Q1 simultaneously, and timing chip U3's is defeated
Outlet exports low level, the first NPN type triode Q1 cut-off, and the collector and emitter of the first NPN type triode Q1 disconnects, base
The electric current of the anode of quasi- source of stable pressure U1 is by diode D2 flow direction ground.A tube voltage drop is had when diode D2 forward conduction, it should
Depending on the voltage value of tube voltage drop is with specific reference to the type of diode D2, in the present embodiment, the voltage value of the tube voltage drop is 0.7V, from
And the anode voltage of reference voltage stabilizing source U1 is 0.7V, the cathode voltage of reference voltage stabilizing source U1 rises 0.7V, i.e. a reference source voltage quilt
0.7V is raised, hysteresis is formed and compares.Backup Power Switch is such as closed, the voltage signal of scaled down must be more spare than starting
Voltage when power supply is higher than the voltage value of the tube voltage drop, is here 0.7V, and realization will not exist because of the voltage of monitored alternating current
Backup power source back and forth starts and disconnects when starting the critical point of backup power source setting value.
When monitored alternating current restores normal, the voltage signal of scaled down is higher than the pipe than the reference power supply value of setting
After the voltage value of pressure drop, comparator U2A exports low level, resets timing chip U3 timing, the output end of timing chip U3
Export high level.The first input end of NAND gate U4A becomes high level, and third PNP type triode Q3 ends, at this time the second capacitor
Voltage on C2 is 0V, i.e. the second input terminal of NAND gate U4A is low level, and the output end of NAND gate U4A still maintains at this time
High level, backup power source are still persistently opened, and the second capacitor C2 is charged by 5V power supply by the 5th resistance R5 for it, when the second electricity
After voltage on appearance C2 is charged to high level, the output end output of NAND gate U4A becomes low level, exports with the output end of door U5A
Become low level, close Backup Power Switch, realizes the purpose of time-delay closing backup power source.
In the description of this specification, reference term " one embodiment ", " some embodiments ", " example ", " specifically show
The description of example " or " some examples " etc. means specific features, structure, material or spy described in conjunction with this embodiment or example
Point is contained at least one embodiment or example of the utility model.In the present specification, to the schematic table of above-mentioned term
Stating may not refer to the same embodiment or example.Moreover, particular features, structures, materials, or characteristics described can be
It can be combined in any suitable manner in any one or more embodiment or examples.
While there has been shown and described that the embodiments of the present invention, it will be understood by those skilled in the art that:
These embodiments can be carried out with a variety of variations, modification, replacement in the case where not departing from the principles of the present invention and objective
And modification, the scope of the utility model are defined by the claims and their equivalents.
Claims (9)
1. a kind of alternating current monitoring unit, it is characterised in that: including rectifier (D1), comparator (U2A), first timer and output
Controller；
Monitored exchange is electrically connected the input terminal of the rectifier (D1), and the rectifier (D1) rectifies the sine wave of alternating current
At half-wave, the first input end of the output end of the rectifier (D1) connection comparator (U2A), the of the comparator (U2A)
Two input terminals connect reference voltage output terminal, and the output end of the comparator (U2A) connects first timer input terminal, when comparing
When the voltage of the first input end input of device (U2A) is lower than reference voltage, first timer starts timing, as comparator (U2A)
First input end input voltage be higher than reference voltage when, first timer timing reset, the first timer output end
The o controller is connected, the control terminal connection of the o controller output end and Backup Power Switch controls described standby
With opening and closing for power switch.
2. alternating current monitoring unit according to claim 1, it is characterised in that: further include that backup power source delay disconnects timing
Device, the backup power source delay disconnect timer input terminal and connect the first timer output end, the backup power source delay
It disconnects timer output end and connects the o controller input terminal.
3. alternating current monitoring unit according to claim 1, it is characterised in that: the reference voltage is by hysteresis adjustable reference source
It provides, the first timer output end is additionally coupled to hysteresis adjustable reference source input terminal.
4. alternating current monitoring unit according to claim 1, it is characterised in that: the o controller also with electrical equipment
Master control system connection, the master control system of the electrical equipment send the working condition of electrical equipment to the o controller.
5. alternating current monitoring unit according to claim 1, it is characterised in that: the first timer includes timing chip
(U3), timing resistor (R4), timing capacitor (C1) and the second PNP type triode (Q2)；
Comparator (U2A) output end connects the triggering end of the timing chip (U3), the electric discharge of the timing chip (U3)
End and threshold value end are connected to the first end of the first end of the timing resistor (R4), timing capacitor (C1), the timing electricity
The second end of resistance (R4) is connected to 5V power supply, the second end ground connection of the timing capacitor (C1), second PNP type triode
(Q2) emitter connects the first end of the timing capacitor (C1), the collector connection of second PNP type triode (Q2)
The base stage of the second end of the timing capacitor (C1), second PNP type triode (Q2) connects the defeated of the comparator (U2A)
The output end of outlet, the timing chip (U3) is connected to the o controller.
6. alternating current monitoring unit according to claim 2, it is characterised in that: the backup power source delay disconnects timer packet
Include the 5th resistance (R5), the second capacitor (C2) and third PNP type triode (Q3)；
The first timer output end connects the base stage of the third PNP type triode (Q3), the third PNP type triode
(Q3) grounded collector, emitter connect one end of second capacitor (C2) and one end of the 5th resistance (R5), institute
The other end ground connection of the second capacitor (C2) is stated, the other end of the 5th resistance (R5) connects 5V power supply, the third positive-negative-positive three
The emitter of pole pipe (Q3) is additionally coupled to the o controller.
7. alternating current monitoring unit according to claim 6, it is characterised in that: the o controller includes NAND gate
(U4A)；
The first timer output end connects the first input end of the NAND gate (U4A), the third PNP type triode
(Q3) emitter connects the second input terminal of the NAND gate (U4A), and the output end of the NAND gate (U4A) connects standby electricity
The control terminal of source switch.
8. alternating current monitoring unit according to claim 7, it is characterised in that: the o controller further includes and door
(U5A), the output end connection first input end with door (U5A) of the NAND gate (U4A), the with door (U5A)
Two input terminals connect the electrical equipment working state output terminal of the master control system of electrical equipment, the output end with door (U5A)
Connect the control terminal of Backup Power Switch.
9. alternating current monitoring unit according to claim 3, it is characterised in that: hysteresis adjustable reference source includes that benchmark is steady
Potential source (U1), diode (D2), adjustable rheostat (RP1) and the first NPN type triode (Q1)；
The cathode of the reference voltage stabilizing source (U1) connects the positive terminal of the comparator (U2A), the positive of the comparator (U2A)
End is also connected with the 5th resistance (R5), and the 5th resistance (R5) is connected to 5V power supply, the anode of the reference voltage stabilizing source (U1)
It is separately connected coil one end, three pole of the first NPN type of positive, the described adjustable rheostat (RP1) of the diode (D2)
Manage the collector of (Q1)；The reference pole of the reference voltage stabilizing source (U1) connects the adjustable side of the adjustable rheostat (RP1), described
The coil other end of adjustable rheostat (RP1) connects the positive terminal of the comparator (U2A), first NPN type triode
(Q1) base stage connects the output end of the first timer, the emitter and diode of first NPN type triode (Q1)
(D2) cathode ground connection.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920214391.5U CN209313530U (en) | 2019-02-20 | 2019-02-20 | A kind of alternating current monitoring unit |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920214391.5U CN209313530U (en) | 2019-02-20 | 2019-02-20 | A kind of alternating current monitoring unit |
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| Publication Number | Publication Date |
|---|---|
| CN209313530U true CN209313530U (en) | 2019-08-27 |
Family
ID=67681788
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201920214391.5U Withdrawn - After Issue CN209313530U (en) | 2019-02-20 | 2019-02-20 | A kind of alternating current monitoring unit |
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| CN (1) | CN209313530U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713799A (en) * | 2019-02-20 | 2019-05-03 | 重庆山外山血液净化技术股份有限公司 | Alternating current monitoring unit |
-
2019
- 2019-02-20 CN CN201920214391.5U patent/CN209313530U/en not_active Withdrawn - After Issue
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109713799A (en) * | 2019-02-20 | 2019-05-03 | 重庆山外山血液净化技术股份有限公司 | Alternating current monitoring unit |
| CN109713799B (en) * | 2019-02-20 | 2024-05-03 | 重庆山外山血液净化技术股份有限公司 | Commercial power monitoring unit |
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