CN204129192U - Power-supply fluctuation analyser - Google Patents
Power-supply fluctuation analyser Download PDFInfo
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- CN204129192U CN204129192U CN201420353729.2U CN201420353729U CN204129192U CN 204129192 U CN204129192 U CN 204129192U CN 201420353729 U CN201420353729 U CN 201420353729U CN 204129192 U CN204129192 U CN 204129192U
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Abstract
The utility model discloses a kind of power-supply fluctuation analyser, comprise communication power supply input end, for gather the ac current signal of load AC current collecting module, for gathering the DC voltage acquisition module of the d. c. voltage signal of load, Signal-regulated kinase, signal processing module, signal processing module feed circuit and relay; The Gather and input end of AC current collecting module and DC voltage acquisition module is all connected with load; The output terminal of AC current collecting module and DC voltage acquisition module is all connected with the sampling end of signal processing module through Signal-regulated kinase; The first end of relay is connected with communication power supply input end, and the second end of relay is connected with the power end of load, and the control end of relay is connected with an I/O mouth of signal processing module.The utility model improves the accuracy tested the power-supply fluctuation of electronic equipment, and improves the test efficiency tested the power-supply fluctuation of electronic equipment.
Description
Technical Field
The utility model relates to an electronic equipment field especially relates to a power fluctuation analysis appearance.
Background
With the development of electronic technology, the requirements of electronic devices and even chips on the working environment are higher and higher, especially on the power supply. After the electronic device is started by alternating current, whether the electronic device can be normally started is the key of the reliability of the electronic device. When the electronic equipment is started by alternating current, if the voltage and current conditions of the electronic equipment can be monitored, whether the electronic equipment can be started normally can be judged.
At present, a lot of electronic devices perform ac power-on and power-off tests (power supply fluctuation test for short) before batch production, for example, television sets perform power supply fluctuation tests before batch production, so as to ensure that the television sets can be normally started after ac power-on.
In the prior art, the power supply fluctuation test of the television is only to perform simple alternating current and alternating current interruption in a repeated cycle, and whether the television fails or not needs to be monitored in real time manually in the process of performing the alternating current on the television.
SUMMERY OF THE UTILITY MODEL
The utility model discloses a main objective is the accuracy of the power fluctuation test of improvement to electronic equipment to and improve the experimental efficiency of power fluctuation to electronic equipment.
In order to achieve the above object, the present invention provides a power supply fluctuation analyzer, which comprises an ac power supply input end, an ac current collecting module for collecting an ac current signal of a load, a dc voltage collecting module for collecting a dc voltage signal of the load, a signal conditioning module, a signal processing module power supply circuit, and a relay; wherein,
the acquisition input end of the alternating current acquisition module and the acquisition input end of the direct current acquisition module are both connected with a load; the output end of the alternating current acquisition module and the output end of the direct current acquisition module are connected with the sampling end of the signal processing module through the signal conditioning module; the first end of the relay is connected with the input end of the alternating current power supply, the second end of the relay is connected with the power end of a load, and the control end of the relay is connected with the first I/O port of the signal processing module; the signal processing module power supply circuit is connected between the input end of the alternating current power supply and the power input end of the signal processing module.
Preferably, the power fluctuation analyzer further comprises a parameter setting module, and the parameter setting module is connected with the second I/O port of the signal processing module.
Preferably, the power fluctuation analyzer further comprises a display module for displaying the parameters set by the parameter setting module; and the display module is connected with a third I/O port of the signal processing module.
Preferably, the signal conditioning module comprises a first signal conditioning module for filtering, rectifying and amplifying the output signal of the alternating current acquisition module, and a second signal conditioning module for dividing and filtering the output signal of the direct current voltage acquisition module; wherein,
the first signal conditioning module comprises a filtering amplifying circuit and a rectifying amplifying circuit; the input end of the filtering amplification circuit is connected with the output end of the alternating current acquisition module, and the output end of the filtering amplification circuit is connected with the input end of the rectification amplification circuit; the output end of the rectification amplifying circuit is connected with the first sampling end of the signal processing module;
the second signal conditioning module comprises a voltage division circuit and a filter circuit; the input end of the voltage division circuit is connected with the output end of the direct-current voltage acquisition module, and the output end of the voltage division circuit is connected with the input end of the filter circuit; and the output end of the filter circuit is connected with the second sampling end of the signal processing module.
Preferably, the filtering and amplifying circuit includes a first power input terminal, a second power input terminal, a first resistor, a second resistor, a third resistor, a first capacitor, and a first operational amplifier; wherein,
the first end of the first resistor is connected with the output end of the alternating current acquisition module, and the second end of the first resistor is connected with the positive phase input end of the first operational amplifier; the first end of the first capacitor is connected with the second end of the first resistor, and the second end of the first capacitor is grounded; the first end of the second resistor is grounded, and the second end of the second resistor is connected with the output end of the first operational amplifier through a third resistor; the inverting input end of the first operational amplifier is connected between the second resistor and the third resistor; the positive power supply end of the first operational amplifier is connected with the first power supply input end, and the negative power supply end of the first operational amplifier is connected with the second power supply input end.
Preferably, the rectifying and amplifying circuit includes a second operational amplifier, a third operational amplifier, a first diode, a second diode, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, and a tenth resistor; wherein,
the inverting input end of the second operational amplifier is connected with the output end of the first operational amplifier through a fourth resistor, the non-inverting input end of the second operational amplifier is grounded through a fifth resistor, the output end of the second operational amplifier is respectively connected with the anode of the first diode and the cathode of the second diode, the positive power supply end of the second operational amplifier is connected with the input end of the first power supply, and the negative power supply end of the second operational amplifier is connected with the input end of the second power supply; the cathode of the first diode is connected with the inverting input end of the second operational amplifier; the anode of the second diode is connected with the inverting input end of the second operational amplifier through a sixth resistor; the anode of the second diode is also connected with the inverting input end of the third operational amplifier through a seventh resistor; the positive phase input end of the third operational amplifier is grounded through an eighth resistor, the output end of the third operational amplifier is connected with the first sampling end of the signal processing module, the output end of the third operational amplifier is connected with the inverting input end of the third operational amplifier through a ninth resistor, the inverting input end of the third operational amplifier is connected with the output end of the first operational amplifier through a tenth resistor, the positive power supply end of the third operational amplifier is connected with the first power supply input end, and the negative power supply end of the third operational amplifier is connected with the second power supply input end.
Preferably, the voltage dividing circuit comprises a precision adjustable resistor; the first end of the precise adjustable resistor is connected with the output end of the direct-current voltage acquisition module, the second end of the precise adjustable resistor is grounded, and the adjusting end of the precise adjustable resistor is connected with the input end of the filter circuit.
Preferably, the filter circuit includes an eleventh resistor and a second capacitor; wherein,
the first end of the eleventh resistor is connected with the adjusting end of the precision adjustable resistor, and the second end of the eleventh resistor is connected with the second sampling end of the signal processing module; and the first end of the second capacitor is connected with the second end of the eleventh resistor, and the second end of the second capacitor is grounded.
Preferably, the power supply fluctuation analyzer further comprises an alarm device, wherein the alarm device comprises a twelfth resistor, a thirteenth resistor, an LED, a triode and a buzzer; wherein,
the first end of the twelfth resistor is connected with the fourth I/O port of the signal processing module, and the second end of the twelfth resistor is connected with the anode of the LED; the cathode of the LED is grounded; the first end of the thirteenth resistor is connected with the fifth I/O port of the signal processing module, and the second end of the thirteenth resistor is connected with the base electrode of the triode; the emitting electrode of the triode is grounded, and the collecting electrode of the triode is connected with the negative electrode of the buzzer; and the positive electrode of the buzzer is connected with the first power supply input end.
Preferably, the alternating current acquisition module is a current transformer; the direct current voltage acquisition module is an adjustable rheostat; the parameter setting module is a keyboard module; the display module is a liquid crystal display module.
The utility model discloses a power supply fluctuation analyzer, including AC power supply input end, AC current acquisition module for acquiring the AC current signal of load, DC voltage acquisition module for acquiring the DC voltage signal of load, signal conditioning module, signal processing module power supply circuit and relay; the acquisition input end of the alternating current acquisition module and the acquisition input end of the direct current acquisition module are both connected with a load; the output end of the alternating current acquisition module and the output end of the direct current acquisition module are connected with the sampling end of the signal processing module through the signal conditioning module; the first end of the relay is connected with the input end of the alternating current power supply, the second end of the relay is connected with the power supply end of the load, and the control end of the relay is connected with the first I/O port of the signal processing module; the power supply circuit of the signal processing module is connected between the input end of the alternating current power supply and the power input end of the signal processing module. The utility model provides high accuracy to electronic equipment's power fluctuation is experimental to and improved the experimental efficiency of the power fluctuation experiment to electronic equipment, simultaneously, the utility model discloses still have simple structure, convenient operation, low power dissipation and the high advantage of stability.
Drawings
FIG. 1 is a schematic block diagram of the power fluctuation analyzer according to the preferred embodiment of the present invention;
FIG. 2 is a circuit diagram of a first signal conditioning module according to a preferred embodiment of the power fluctuation analyzer of the present invention;
FIG. 3 is a circuit diagram of a second signal conditioning module according to a preferred embodiment of the power fluctuation analyzer of the present invention;
fig. 4 is a circuit diagram of an alarm device in a preferred embodiment of the power fluctuation analyzer of the present invention.
The objects, features and advantages of the present invention will be realized by the embodiments and will be further described with reference to the accompanying drawings.
Detailed Description
It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.
The utility model provides a power supply fluctuation analyzer.
Referring to fig. 1, fig. 1 is a schematic circuit block diagram of a preferred embodiment of the power fluctuation analyzer of the present invention.
In a preferred embodiment, the power fluctuation analyzer 100 includes an ac current collection module 101, a dc voltage collection module 102, a signal conditioning module 103, a signal processing module 104, a parameter setting module 105, an alarm device 106, a display module 107, an ac power input 108, a signal processing module power supply circuit 109, and a relay 110. Wherein the signal conditioning module 103 comprises a first signal conditioning module 1031 and a second signal conditioning module 1032. The signal processing module 104 in this embodiment is a single chip microcomputer.
Specifically, the acquisition input end of the alternating current acquisition module 101 and the acquisition input end of the direct current acquisition module 102 are both connected with the load 200; the output end of the alternating current acquisition module 101 is connected with the first sampling end ADC1 of the signal processing module 104 through the first signal conditioning module 1031; the output end of the dc voltage collecting module 102 is connected to the second sampling end ADC2 of the signal processing module 104 through the second signal conditioning module 1032; a first end of the relay 110 is connected with the input end 108 of the alternating current power supply, a second end of the relay 110 is connected with a power end of the load 200, and a control end of the relay 110 is connected with the first I/O port a of the signal processing module 104; the parameter setting module 105 is connected with a second I/O port B of the signal processing module; the display module 107 is connected with the third I/O port C of the signal processing module; the alarm device 106 is connected with the fourth I/O port D1 and the fifth I/O port D2 of the signal processing module; the input end of the signal processing module power supply circuit 109 is connected to the ac power supply input end 108, and the output end of the signal processing module power supply circuit 109 is connected to the power supply input end VCC of the signal processing module 104.
In this embodiment, the alternating current acquisition module 101 is configured to sample one path of alternating current signals of the load 200; in this embodiment, the ac current collecting module 101 is a current transformer, and the current transformer converts a high-voltage ac current on an ac power line of the load 200 into a low-voltage ac voltage, and outputs a low-voltage ac voltage signal to the first signal conditioning module 1031;
the dc voltage acquisition module 102 is configured to sample a path of dc voltage signal of the load 200, in this embodiment, the dc voltage acquisition module 102 may acquire voltage through a large-resistance adjustable resistor;
the first signal conditioning module 1031 is configured to filter, rectify and amplify the output signal of the ac current collecting module 101, and output the filtered, rectified and amplified signal to the first sampling terminal ADC1 of the signal processing module 104;
the second signal conditioning module 1032 is configured to perform voltage division and filtering processing on the output signal of the direct-current voltage acquisition module 102, and output the signal after voltage division and filtering processing to the second sampling end ADC2 of the signal processing module 104;
the parameter setting module 105 is configured to set a working mode of the power fluctuation analyzer 100 and a current detection threshold and a voltage detection threshold when the load 200 is powered on; in this embodiment, the operation mode of the power supply fluctuation analyzer 100 is divided into a timing switching mode and a random switching mode; the timing switch mode refers to the power supply fluctuation analyzer 100 controlling the load 200 to perform timing power-on and power-off operations; the random switching mode is that the power fluctuation analyzer 100 simulates random power-on and power-off operations of the load 200 performed by the user, that is, the operation of the power fluctuation analyzer 100 controlling the load 200 to perform power-on and power-off operations is not regular. In this embodiment, the parameter setting module 105 is a keyboard module;
the alarm device 106 is used for alarming power failure when the load 200 is started up;
the display module 107 is configured to display the operating mode of the power fluctuation analyzer 100 set by the parameter setting module 105, the current detection threshold and the voltage detection threshold when the load 200 is powered on, and the number of times of power-on failures of the load 200 within a preset time; in this embodiment, the display module 107 is a liquid crystal display module;
the ac power input terminal 108 is used for providing a working power supply for the load 200;
the signal processing module power supply circuit 109 is used for converting the ac power supply input end 108 into the working voltage required by the signal processing module 104;
the signal processing module 104 is configured to control a switching operation of the relay 110 and an alarm operation of the alarm device 106 according to the output signal of the first signal conditioning module 1031 and/or the second signal conditioning module 1032 and the parameter set by the parameter setting module 105, count the number of times of faults occurring in the load 200 within a predetermined time, and control the display module 107 to display the parameter set by the parameter setting module 105 and the number of times of startup faults occurring in the load 200 within a predetermined time. In this embodiment, the signal processing module is MSP430F 449.
In this embodiment, when the load 200 is in the power-on state, the signal processing module 104(MSP430F449) compares the signal sampled by the first sampling terminal ADC1 with the current detection threshold set by the parameter setting module 105, and compares the signal sampled by the second sampling terminal ADC2 with the voltage detection threshold set by the parameter setting module 105, when the signal sampled by the first sampling terminal ADC1 is smaller than the set current detection threshold and/or the signal sampled by the second sampling terminal ADC2 is smaller than the set voltage detection threshold (i.e. the load 200 has a power-on failure), the signal processing module 104 outputs a corresponding control signal to control the alarm device 106 to alarm and outputs a corresponding control signal to the control terminal of the relay 110, so as to control the relay 110 to be in the closed state (i.e. to keep the load 200 in the power-on state), the fault state is locked to notify the technician to analyze the fault, until the switching time is up, the signal processing module 104 controls the relay 110 to turn off, and then the next startup fault detection of the load 200 is performed.
The power supply fluctuation analyzer provided by the embodiment comprises an alternating current power supply input end, an alternating current acquisition module for acquiring alternating current signals of a load, a direct current voltage acquisition module for acquiring direct current voltage signals of the load, a signal conditioning module, a signal processing module power supply circuit, a parameter setting module, an alarm device, a display module and a relay; the signal conditioning module comprises a first signal conditioning module and a second signal conditioning module; the acquisition input end of the alternating current acquisition module and the acquisition input end of the direct current acquisition module are both connected with a load; the output end of the alternating current acquisition module is connected with the first sampling end of the signal processing module through the first signal conditioning module; the output end of the direct current voltage acquisition module is connected with the second sampling end of the signal processing module through the second signal conditioning module; the first end of the relay is connected with the input end of the alternating current power supply, the second end of the relay is connected with the power supply end of the load, and the control end of the relay is connected with the first I/O port of the signal processing module; the parameter setting module is connected with a second I/O port of the signal processing module; the display module is connected with a third I/O port of the signal processing module; the alarm device is connected with the fourth I/O port and the fifth I/O port of the signal processing module; the power supply circuit is connected between the input end of the alternating current power supply and the power input end of the signal processing module. The power fluctuation analyzer that this embodiment provided has improved the experimental accuracy of power fluctuation to electronic equipment to and improved the experimental efficiency of power fluctuation to electronic equipment, simultaneously, the utility model discloses still have simple structure, convenient operation, the low power dissipation and the high advantage of stability.
Fig. 2 is a circuit diagram of the first signal conditioning module in the preferred embodiment of the power fluctuation analyzer of the present invention.
Referring to fig. 1 and 2 together, in a preferred embodiment, the first signal conditioning module 1031 includes a filter amplifying circuit 10311 and a rectifier amplifying circuit 10312. An input end of the filter amplification circuit 1031 is connected with an output end of the alternating current acquisition module 101, and an output end of the filter amplification circuit 10311 is connected with an input end of the rectification amplification circuit 10312; an output terminal of the rectifying and amplifying circuit 10312 is connected to the first sampling terminal ADC1 of the signal processing module 104.
Specifically, the filter amplification circuit 10311 includes a +5V first power input terminal, a-5V second power input terminal, a first resistor R21, a second resistor R17, a third resistor R18, a first capacitor C46, and a first operational amplifier U1;
a first end of the first resistor R21 is an input end of the filter amplification circuit 10311, and is connected to an output end of the alternating current acquisition module 101, and a second end of the first resistor R21 is connected to a non-inverting input end of the first operational amplifier U1; a first end of the first capacitor C46 is connected with a second end of the first resistor R21, and a second end of the first capacitor C46 is grounded; a first end of the second resistor R17 is grounded, and a second end of the second resistor R17 is connected with the output end of the first operational amplifier U1 through a third resistor R18; the inverting input end of the first operational amplifier U1 is connected between the second resistor R17 and the third resistor R18; the positive power supply terminal of the first operational amplifier U1 is connected to the +5V first power supply input terminal, and the negative power supply terminal of the first operational amplifier U1 is connected to the-5V second power supply input terminal. The output terminal of the first operational amplifier U1 is the output terminal of the filter amplifier circuit 10311, and is connected to the input terminal of the rectifier amplifier circuit 1032.
The rectifying and amplifying circuit 10312 includes a second operational amplifier U2, a third operational amplifier U3, a first diode D2, a second diode D3, a fourth resistor R22, a fifth resistor R25, a sixth resistor R15, a seventh resistor R24, an eighth resistor R26, a ninth resistor R19, and a tenth resistor R29.
The inverting input end of the second operational amplifier U2 is connected to the output end of the first operational amplifier U1 through a fourth resistor R22, the non-inverting input end of the second operational amplifier U2 is grounded through a fifth resistor R25, the output end of the second operational amplifier U2 is connected to the anode of the first diode D2 and the cathode of the second diode D2 respectively, the positive power supply end of the second operational amplifier U2 is connected to the +5V first power supply input end, and the negative power supply end of the second operational amplifier U2 is connected to the-5V second power supply input end; the cathode of the first diode D2 is connected with the inverting input end of the second operational amplifier U2; the anode of the second diode D2 is connected to the inverting input terminal of the second operational amplifier U2 through a sixth resistor R15; the anode of the second diode D2 is also connected to the inverting input terminal of the third operational amplifier U3 through a seventh resistor R24; the non-inverting input terminal of the third operational amplifier U3 is grounded via an eighth resistor R26, the output terminal of the third operational amplifier U3 is connected to the first sampling terminal ADC1 of the signal processing module 104, the output terminal of the third operational amplifier U3 is further connected to the inverting input terminal of the third operational amplifier U3 via a ninth resistor R19, the inverting input terminal of the third operational amplifier U3 is further connected to the output terminal of the first operational amplifier U1 via a tenth resistor R29, the positive power supply terminal of the third operational amplifier U3 is connected to the +5V first power supply input terminal, and the negative power supply terminal of the third operational amplifier U3 is connected to the-5V second power supply input terminal. In this embodiment, the fourth resistor R22, the seventh resistor R24 and the tenth resistor R29 have the same resistance, that is, R22 ═ R24 ═ R29, and the sixth resistor R15 has the same resistance as twice the resistance of the fourth resistor R22, that is, R15 ═ 2R 22.
In this embodiment, the first resistor R21 and the first capacitor C46 form a filter circuit in the filter amplifying circuit 10311, and filter the input signal Vin1 (i.e., the output signal of the ac current collecting module 101). The first operational amplifier U1, the second resistor R17 and the third resistor R18 form an amplifying circuit in the filtering amplifying circuit 10311, which amplifies the filtered input signal Vin1 and outputs a voltage signal Ui, wherein the second resistor R17 and the third resistor R18 control the amplification factor; since the fourth resistor R22, the seventh resistor R24, and the tenth resistor R29 in the rectifying and amplifying circuit 10312 have the same resistance, i.e., R22 equals to R24 equals to R29, and the sixth resistor R15 has the same resistance as twice the fourth resistor R22, i.e., R15 equals to 2R 22,
when Ui > 0, the first diode D2 is turned off, the second diode D3 is turned on, and therefore, the voltage Uii at the anode of the second diode D3 is-2 Ui, and since the voltage at the right end of the tenth resistor R29 is Ui (ignoring the voltage drop of the tenth resistor R29 itself), the voltage Uo1 at the output end of the third operational amplifier U3 is:
when Ui < 0, the first diode D2 is turned on, and the second diode D3 is turned off, so that the voltage Uii at the anode of the second diode D3 is equal to 0, and the voltage Uo1 at the output end of the third operational amplifier U3 is:
that is, in this embodiment, the first signal conditioning module 1031 converts the ac voltage signal at the input end thereof (i.e., the low-voltage ac voltage signal output by the current transformer) into a dc voltage signal, and outputs the dc voltage signal to the first sampling end ADC1 of the signal processing module 104, so that the signal processing module 104 samples the dc voltage signal in real time.
Fig. 3 is a circuit diagram of a second signal conditioning module in a preferred embodiment of the power fluctuation analyzer of the present invention.
Referring to fig. 1 and 3 together, in a preferred embodiment, the second signal conditioning module 1032 includes a voltage divider circuit 10321 and a filter circuit 10322. An input end of the voltage dividing circuit 10321 is connected with an output end of the dc voltage acquisition module 102, and an output end of the voltage dividing circuit 10321 is connected with an input end of the filter circuit 10322; an output terminal of the filter circuit 10322 is connected to the second sampling terminal ADC2 of the signal processing module 104.
Specifically, the voltage divider circuit 10321 employs a precision adjustable resistor RWH; a first end of the precision adjustable resistor RWH is connected with the output end of the direct-current voltage acquisition module 102, a second end of the precision adjustable resistor RWH is grounded, and an adjusting end of the precision adjustable resistor RWH is connected with the input end of the filter circuit 10322;
the filter circuit 10322 includes an eleventh resistor R13 and a second capacitor C43. A first end of the eleventh resistor R13 is an input end of the filter circuit 10322 and is connected to an adjusting end of the precision adjustable resistor RWH, and a second end of the eleventh resistor R13 is an output end of the filter circuit 10322 and is connected to the second sampling end ADC2 of the signal processing module 104; a first terminal of the second capacitor C43 is connected to the second terminal of the eleventh resistor R13, and a second terminal of the second capacitor C43 is grounded.
In this embodiment, the second signal conditioning module 1032 divides and filters the dc voltage signal Vin2 at the input end thereof (i.e., the dc voltage signal of the load 200 acquired by the dc voltage acquisition module 102), and outputs the divided and filtered dc voltage signal Uo2 to the second sampling end ADC2 of the signal processing module 104, so that the signal processing module 104 can sample the signal in real time.
Fig. 4 is a circuit diagram of an alarm device in a preferred embodiment of the power fluctuation analyzer of the present invention.
Referring to fig. 1 and 4 together, in a preferred embodiment, the alarm device 106 includes a twelfth resistor R31, a thirteenth resistor R32, an LED D4, a transistor Q1, and a buzzer BEEF.
A first end of the twelfth resistor R31 is connected to the fourth I/O port D1 of the signal processing module 104, and a second end of the twelfth resistor R31 is connected to the anode of the LED light emitting diode D4; the cathode of the LED D4 is grounded; a first end of the thirteenth resistor R32 is connected to the fifth I/O port D2 of the signal processing module 104, and a second end of the thirteenth resistor R32 is connected to the base of the transistor Q1; the emitting electrode of the triode Q1 is grounded, and the collecting electrode of the triode Q1 is connected with the negative electrode of the buzzer BEEF; the positive pole of buzzer BEEF is connected with the +5V first power input end.
In this embodiment, when the load 200 has a power-on failure (i.e., when the signal sampled by the first sampling terminal ADC1 of the signal processing module 104 is smaller than the set current detection threshold and/or the signal sampled by the second sampling terminal ADC2 of the signal processing module 104 is smaller than the set voltage detection threshold), the signal processing module 104 outputs a high-level signal out1 to the base of the transistor Q1, and the transistor Q1 is turned on, so that the buzzer BEEF emits an alarm sound; meanwhile, the signal processing module 104 outputs a high-level signal out2 to the anode of the LED D4 to light the LED D4.
The above only is the preferred embodiment of the present invention, not limiting the scope of the present invention, all the equivalent structures or equivalent flow changes made by the contents of the specification and the drawings, or directly or indirectly applied to other related technical fields, are included in the same way in the protection scope of the present invention.
Claims (10)
1. A power supply fluctuation analyzer is characterized by comprising an alternating current power supply input end, an alternating current acquisition module for acquiring alternating current signals of a load, a direct current voltage acquisition module for acquiring direct current voltage signals of the load, a signal conditioning module, a signal processing module power supply circuit and a relay; wherein,
the acquisition input end of the alternating current acquisition module and the acquisition input end of the direct current acquisition module are both connected with a load; the output end of the alternating current acquisition module and the output end of the direct current acquisition module are connected with the sampling end of the signal processing module through the signal conditioning module; the first end of the relay is connected with the input end of the alternating current power supply, the second end of the relay is connected with the power end of a load, and the control end of the relay is connected with the first I/O port of the signal processing module; the signal processing module power supply circuit is connected between the input end of the alternating current power supply and the power input end of the signal processing module.
2. The power fluctuation analyzer of claim 1, further comprising a parameter setting module, the parameter setting module being connected to the second I/O port of the signal processing module.
3. The power fluctuation analyzer of claim 2, further comprising a display module for displaying the parameter set by the parameter setting module; and the display module is connected with a third I/O port of the signal processing module.
4. The power fluctuation analyzer of claim 1, 2 or 3, wherein the signal conditioning module comprises a first signal conditioning module for filtering, rectifying and amplifying the output signal of the alternating current acquisition module, and a second signal conditioning module for dividing and filtering the output signal of the direct current acquisition module; wherein,
the first signal conditioning module comprises a filtering amplifying circuit and a rectifying amplifying circuit; the input end of the filtering amplification circuit is connected with the output end of the alternating current acquisition module, and the output end of the filtering amplification circuit is connected with the input end of the rectification amplification circuit; the output end of the rectification amplifying circuit is connected with the first sampling end of the signal processing module;
the second signal conditioning module comprises a voltage division circuit and a filter circuit; the input end of the voltage division circuit is connected with the output end of the direct-current voltage acquisition module, and the output end of the voltage division circuit is connected with the input end of the filter circuit; and the output end of the filter circuit is connected with the second sampling end of the signal processing module.
5. The power supply fluctuation analyzer of claim 4, wherein the filtering and amplifying circuit comprises a first power supply input terminal, a second power supply input terminal, a first resistor, a second resistor, a third resistor, a first capacitor and a first operational amplifier; wherein,
the first end of the first resistor is connected with the output end of the alternating current acquisition module, and the second end of the first resistor is connected with the positive phase input end of the first operational amplifier; the first end of the first capacitor is connected with the second end of the first resistor, and the second end of the first capacitor is grounded; the first end of the second resistor is grounded, and the second end of the second resistor is connected with the output end of the first operational amplifier through a third resistor; the inverting input end of the first operational amplifier is connected between the second resistor and the third resistor; the positive power supply end of the first operational amplifier is connected with the first power supply input end, and the negative power supply end of the first operational amplifier is connected with the second power supply input end.
6. The power fluctuation analyzer of claim 5, wherein the rectifying and amplifying circuit comprises a second operational amplifier, a third operational amplifier, a first diode, a second diode, a fourth resistor, a fifth resistor, a sixth resistor, a seventh resistor, an eighth resistor, a ninth resistor, and a tenth resistor; wherein,
the inverting input end of the second operational amplifier is connected with the output end of the first operational amplifier through a fourth resistor, the non-inverting input end of the second operational amplifier is grounded through a fifth resistor, the output end of the second operational amplifier is respectively connected with the anode of the first diode and the cathode of the second diode, the positive power supply end of the second operational amplifier is connected with the input end of the first power supply, and the negative power supply end of the second operational amplifier is connected with the input end of the second power supply; the cathode of the first diode is connected with the inverting input end of the second operational amplifier; the anode of the second diode is connected with the inverting input end of the second operational amplifier through a sixth resistor; the anode of the second diode is also connected with the inverting input end of the third operational amplifier through a seventh resistor; the positive phase input end of the third operational amplifier is grounded through an eighth resistor, the output end of the third operational amplifier is connected with the first sampling end of the signal processing module, the output end of the third operational amplifier is further connected with the inverting input end of the third operational amplifier through a ninth resistor, the inverting input end of the third operational amplifier is further connected with the output end of the first operational amplifier through a tenth resistor, the positive power supply end of the third operational amplifier is connected with the first power supply input end, and the negative power supply end of the third operational amplifier is connected with the second power supply input end.
7. The power fluctuation analyzer of claim 6, wherein the voltage divider circuit comprises a precision adjustable resistor; the first end of the precise adjustable resistor is connected with the output end of the direct-current voltage acquisition module, the second end of the precise adjustable resistor is grounded, and the adjusting end of the precise adjustable resistor is connected with the input end of the filter circuit.
8. The power fluctuation analyzer of claim 7, wherein the filter circuit comprises an eleventh resistor and a second capacitor; wherein,
the first end of the eleventh resistor is connected with the adjusting end of the precision adjustable resistor, and the second end of the eleventh resistor is connected with the second sampling end of the signal processing module; and the first end of the second capacitor is connected with the second end of the eleventh resistor, and the second end of the second capacitor is grounded.
9. The power fluctuation analyzer of claim 8, further comprising an alarm device, the alarm device comprising a twelfth resistor, a thirteenth resistor, an LED, a triode, and a buzzer; wherein,
the first end of the twelfth resistor is connected with the fourth I/O port of the signal processing module, and the second end of the twelfth resistor is connected with the anode of the LED; the cathode of the LED is grounded; the first end of the thirteenth resistor is connected with the fifth I/O port of the signal processing module, and the second end of the thirteenth resistor is connected with the base electrode of the triode; the emitting electrode of the triode is grounded, and the collecting electrode of the triode is connected with the negative electrode of the buzzer; and the positive electrode of the buzzer is connected with the first power supply input end.
10. The power fluctuation analyzer of claim 3, wherein the alternating current collection module is a current transformer; the direct current voltage acquisition module is an adjustable rheostat; the parameter setting module is a keyboard module; the display module is a liquid crystal display module.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
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| CN201420353729.2U CN204129192U (en) | 2014-06-27 | 2014-06-27 | Power-supply fluctuation analyser |
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| Application Number | Priority Date | Filing Date | Title |
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| CN201420353729.2U CN204129192U (en) | 2014-06-27 | 2014-06-27 | Power-supply fluctuation analyser |
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Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167690A (en) * | 2017-05-15 | 2017-09-15 | 湖南利能科技股份有限公司 | A kind of voltage acquisition system for battery pack broken thread detector and method |
| CN110346671A (en) * | 2019-08-22 | 2019-10-18 | 珠海格力电器股份有限公司 | Fault reminding method and device for electric equipment and electric equipment |
| CN113835384A (en) * | 2021-09-30 | 2021-12-24 | 深圳市长龙铁路电子工程有限公司 | Monitoring system |
-
2014
- 2014-06-27 CN CN201420353729.2U patent/CN204129192U/en not_active Expired - Fee Related
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN107167690A (en) * | 2017-05-15 | 2017-09-15 | 湖南利能科技股份有限公司 | A kind of voltage acquisition system for battery pack broken thread detector and method |
| CN110346671A (en) * | 2019-08-22 | 2019-10-18 | 珠海格力电器股份有限公司 | Fault reminding method and device for electric equipment and electric equipment |
| CN113835384A (en) * | 2021-09-30 | 2021-12-24 | 深圳市长龙铁路电子工程有限公司 | Monitoring system |
| CN113835384B (en) * | 2021-09-30 | 2023-11-28 | 深圳市长龙铁路电子工程有限公司 | Monitoring system |
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