CN209417224U - A kind of preamplifier test device - Google Patents
A kind of preamplifier test device Download PDFInfo
- Publication number
- CN209417224U CN209417224U CN201821820485.9U CN201821820485U CN209417224U CN 209417224 U CN209417224 U CN 209417224U CN 201821820485 U CN201821820485 U CN 201821820485U CN 209417224 U CN209417224 U CN 209417224U
- Authority
- CN
- China
- Prior art keywords
- port
- frequency
- relay
- amplifier
- dsp module
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Active
Links
Landscapes
- Amplifiers (AREA)
Abstract
The application belongs to electronic information technical field, it is related to a kind of preamplifier test device, it is electrically connected to the input port of amplifier and the port d of relay, output port is electrically connected with the Single port for adopting frequency and frequency dividing circuit, the another port for adopting frequency and frequency dividing circuit is connect with one end of DSP module electrical property, the other end of DSP module and the port a of relay are electrically connected, the port b, c ground connection of relay；DSP module is connected by the port a with b of process control relay and generates electromagnetic force, the elastic slice of the port electromagnetic attracting force d and the port c are electrically connected to form short-circuit, or DSP module disconnects release electromagnetic force by the port a and b of process control relay, then the elastic slice of the port d and the port c, which disconnect, is electrically connected to form broken string circuit；The short circuit frequency signal or broken string frequency signal to amplifier for adopting frequency and frequency dividing circuit output that DSP module will receive, export after being analyzed and determined.The device to test is easy, and quickly, efficiency is very high for the speed of test.
Description
Technical field
The embodiment of the present application belongs to electronic information technical field more particularly to a kind of preamplifier test device.
Background technique
Preamplifier, which refers to, is amplified to the received input range of power amplifier institute energy audio signal.Need preceding storing
Big device carries out good conversion and transmitting to its signal.Traditional preamplifier test method be by preamplifier be used for
The reception box for receiving the signal by amplification is connected and powers, and manufactures short circuit phenomenon with the metal shell for receiving box, pulls out connection
Whether normal line manufacture broken string phenomenon finally goes to put frequency values one by one using channel oscilloscope, extremely cumbersome.
Utility model content
To solve the above-mentioned problems, the embodiment of the present application provides a kind of preamplifier test device, to solve existing survey
The problem of method for testing is extremely cumbersome and low efficiency.
Optionally, as a kind of embodiment of the application, the preamplifier test device includes: relay, adopts frequency
With frequency dividing circuit, DSP module；
The relay includes the port a, the port b, the port c and the port d；
The port d of the input port to amplifier and the relay is electrically connected；
The output port to amplifier and the Single port electric connection for adopting frequency and frequency dividing circuit, it is described to adopt frequency
It is connect with the another port of frequency dividing circuit with one end of the DSP module electrical property, the other end of the DSP module and the relay
The port a of device is electrically connected, the port b of the relay, the port c ground connection；
The DSP module is connected with the port b by the port a of relay described in process control and generates electromagnetic force, the electricity
Magnetic force attracts the elastic slice of the port d and the port c to be electrically connected to form short-circuit, or
The DSP module disconnects release electromagnetic force by the port a of relay described in process control and the port b, then the d
The elastic slice of port and the port c, which disconnect, is electrically connected to form broken string circuit；
The DSP module adopts the short circuit frequency signal to amplifier that frequency and frequency dividing circuit export described in receiving
Or broken string frequency signal, it is exported after being analyzed and determined.
Optionally, as another embodiment of the application, the preamplifier test device includes: relay, adopts
Frequency and frequency dividing circuit, DSP module；
Relay includes two, respectively the first relay and the second relay；
Described two relays include the port a, the port b, the port c and the port d；
The port d of the input port to amplifier and first relay is electrically connected；
The output port to amplifier and the Single port electric connection for adopting frequency and frequency dividing circuit, it is described to adopt frequency
It is connect with the another port of frequency dividing circuit with one end of the DSP module electrical property, the output end of the DSP module and described first
The port b of relay is electrically connected, the port a of first relay, the port c ground connection；
The input port to amplifier is also electrically connected with the port d of second relay；
The output end of the DSP module 4 is also electrically connected with the port b of second relay, second relay
The port a ground connection, the port c do not connect anything, is in broken string state；
The DSP module is connected with the port b by the port a of the first relay described in process control and generates electromagnetic force, together
When control the port a of second relay and the port b is disconnected, the elastic slice of the port the electromagnetic attracting force d and the port c are electrical
Connection form short-circuit, at this time to amplifier belong to short circuit state or
The DSP module is connected with the port b by the port a of the second relay described in process control and generates electromagnetic force, together
When control the port a of first relay and the port b is disconnected, the elastic slice of the port the electromagnetic attracting force d and the port c are electrical
Connection forms broken string circuit；
The DSP module adopts the short circuit frequency signal to amplifier that frequency and frequency dividing circuit export described in receiving
Or broken string frequency signal, it is exported after being analyzed and determined.
Further, described to adopt frequency and frequency dividing circuit includes the adopting frequency circuit and have with rectification function of sequential series
The frequency dividing circuit of division function receives the short circuit frequency signal to amplifier output or broken string frequency signal, and passes through
The DSP module is delivered to after rectification and scaling down processing.
Optionally, in some embodiments, the preamplifier test device further includes connecting, being used for DSP module
Show the display module of test result.
Further, the display module is LED display or LCD display.
Further, the DSP module is dsp chip.
Compared with prior art, preamplifier test device provided by the embodiments of the present application has the advantages that
By one relay of DSP module procedure auto-control or the switch of two relays, to amplifier
Outside forms short-circuit or broken string circuit, makes to be in short circuit state or broken string state to amplifier, will be defeated to amplifier
Different frequency signals out, including broken string when frequency signal, be shorted when frequency signal, adopt frequency and frequency dividing circuit frequency is believed
Number be collected and rectified, divide after send DSP module to, whether DSP module carries out discriminatory analysis to signal normal simultaneously
It is exported, test is simple, avoids cumbersome manual test program, improves efficiency reduction cost.
Detailed description of the invention
It, below will be to embodiment or description of the prior art in order to illustrate more clearly of the application or scheme in the prior art
Needed in attached drawing make one and simple introduce, it should be apparent that, the accompanying drawings in the following description is some realities of the application
Example is applied, it for those of ordinary skill in the art, without creative efforts, can also be according to these attached drawings
Obtain other attached drawings.
Fig. 1 is the working principle diagram provided by the embodiments of the present application to amplifier；
Fig. 2 is the schematic diagram that broken string state is in amplifier that the application first embodiment provides；
Fig. 3 is the schematic diagram that short circuit state is in amplifier that the application first embodiment provides；
Fig. 4 is the schematic diagram for the preamplifier test device that the application second embodiment provides.
Specific embodiment
In order to make those skilled in the art more fully understand application scheme, below in conjunction in the embodiment of the present application
Attached drawing, the technical scheme in the embodiment of the application is clearly and completely described.Unless otherwise defined, used herein
All technical and scientific terms are identical as the normally understood meaning of the those skilled in the art for belonging to the application.Herein
Term used in the description of the present application, which is only for the purpose of describing specific embodiments, is not intended to limit this
Application.The description and claims of this application and term " first " in above-mentioned attached drawing, " second " etc. are for distinguishing not
Same object, is not use to describe a particular order.In addition, term " includes " and " having " and their any deformations, it is intended that
Non-exclusive include in covering.
Referenced herein " embodiment " is it is meant that a particular feature, structure, or characteristic described can wrap in conjunction with the embodiments
It is contained at least one embodiment of the application.Each position in the description occur the phrase might not each mean it is identical
Embodiment, nor the independent or alternative embodiment with other embodiments mutual exclusion.Those skilled in the art explicitly and
Implicitly understand, embodiment described herein can be combined with other embodiments.
Referring to Fig. 1, Fig. 1 is the working principle diagram for the preamplifier for applying for that embodiment provides；In the present embodiment to
Amplifier 1 is preamplifier 1, including LC oscillating circuit and shaping circuit, inside preamplifier 1, LC oscillating circuit
Output end and shaping circuit be electrically connected；Preamplifier 1 is electrically connected by LC oscillating circuit and external sensor capacitor；
Using sensor capacitance as a part of LC oscillating circuit, oscillating circuit is sprinkled using the carat of class capacitance three-point type, capacitor is passed
The frequency variation of sensor transmitting carries out signal shaping amplification by triode, its output frequency is as follows:
Wherein, f is frequency, and L is inductance, C0For amplifier capacitor, CXFor load capacitance,
Preamplifier 1 is equivalent in the case where normal work and has loaded a part of capacitor, this partition capacitance is namely
The capacitor of sensor, that is to say, that sensor capacitance actually belongs to a part of preamplifier 1, and frequency is solid at one at this time
Stablize in fixed range.As can be seen that being equivalent to load capacitance C in the case where broken string in from the equations aboveXBecome suddenly
Minimum, frequency can become larger suddenly, and stablize within the scope of one, different from the frequency of normal work；Similarly, work as preamplifier
When short circuit, load capacitance CXBecome larger, frequency can become smaller, and different from the frequency of normal work, so judging an amplifier
Whether Hao Huai standard is that whether frequency of the amplifier when being shorted and the frequency in broken string are normal.
Referring to Fig.2, Fig. 2 is the schematic diagram for the preamplifier test device that the application first embodiment provides；The application
Embodiment provides a kind of preamplifier test device, comprising: relay 2 adopts frequency and frequency dividing circuit 3, DSP module 4；
In the present embodiment, relay 2 only one, including the port a, the port b, the port c, the port d, when the port a and the end b
Mouth can generate electromagnetic force when connecting, and the elastic slice 21 of the port electromagnetic attracting force d is close to the port c；When the port a and the port b are disconnected
Electromagnetic force will not be generated, the elastic slice 21 of the port d is not turned on far from both ports c.
The port d of the input port to amplifier 1 and the relay 2 is electrically connected；
The output port to amplifier 1 and the Single port electric connection for adopting frequency and frequency dividing circuit 3, it is described to adopt
The another port of frequency and frequency dividing circuit 3 is connect with one end of 4 electrical property of the DSP module, one end of the DSP module 4 with it is described
The port a of relay 2 is electrically connected, and the other end is connect by adopting frequency and frequency dividing circuit 3 with to amplifier 1；The relay 2
The port b, the port c is grounded；Specifically, in the present embodiment, the shell to amplifier 1 is ground state, it is only necessary to by c
The shell to amplifier 1 is accessed in port.
Refering to Fig. 3, the schematic diagram that short circuit state is in amplifier provided for the application first embodiment；It is described
DSP module 4 is connected with the port b by the port a of relay 2 described in process control and generates electromagnetic force, the end the electromagnetic attracting force d
The elastic slice 21 of mouth and the port c are electrically connected to form short-circuit, belong to short circuit state to amplifier 1 at this time, specifically, at this
In embodiment, entire preamplifier test device be must be powered on, entire circuit communication, and DSP module 4 passes through process control
The port a of the relay 2 is connected to the port b, it is made to generate electromagnetic force, thus the elastic slice 21 of the port d and the port c form and be shorted
State forms short-circuit outside to amplifier 1, is in short circuit state to amplifier 1 at this time；
Or
Referring to Fig.2, Fig. 2 is the schematic diagram for the preamplifier test device that the application first embodiment provides；When to be measured
Circuit when amplifier 1 is in broken string state is identical as Fig. 2, and the difference of the two during the test is exactly whether circuit is in logical
Electricity condition, therefore the schematic diagram that broken string state is in amplifier of the application second embodiment offer is also provided with Fig. 2；Institute
It states DSP module 4 and release electromagnetic force is disconnected by the port a of relay 2 described in process control and the port b, then the bullet of the port d
Piece 21 and the port c, which disconnect, is electrically connected to form broken string circuit, belongs to broken string state to amplifier 1 at this time, specifically, in this implementation
In example, when DSP module is disconnected, broken string state is also belonged in the outside to amplifier 1, but entire preposition amplification at this time
Device test device is not powered on connection, can not survey the frequency of the output to amplifier 1, so entire preamplifier test device
It must be powered on, entire circuit communication, and DSP module 4 is not connected by the port a and the port b of relay 2 described in process control
It is logical, so that it is not generated electromagnetic force, thus the elastic slice 21 of the port d and the port c form off-state, to 1 outside shape of amplifier
At broken string circuit, broken string state is in amplifier 1 at this time；
The output port to amplifier 1 and one end electric connection for adopting frequency and frequency dividing circuit 3, it is described to adopt frequency
It is electrically connected with the other end of frequency dividing circuit 3 and the DSP module 4, further, frequency and the frequency dividing circuit 3 adopted is including suitable
Sequence is concatenated to adopt frequency circuit and the frequency dividing circuit with division function with rectification function, receives described defeated to amplifier 1
Short circuit frequency signal or broken string frequency signal out, and the DSP module 4 is delivered to after over commutation and scaling down processing；Specifically
, it adopts frequency and frequency dividing circuit 3 receives the different frequency signals transmitted when amplifier 1 is in different conditions, including broken string state
When frequency signal, frequency signal when being shorted, sent to after the frequency signal received the processing such as to be rectified to, divided
DSP module 4.
The DSP module 4 adopts the short circuit frequency to amplifier 1 that frequency and frequency dividing circuit 3 export described in receiving
Signal or broken string frequency signal, export after being analyzed and determined.
Specifically, in the present embodiment, DSP module 4 is dsp chip；Optionally, in some other embodiments, DSP core
Piece can be replaced with single-chip microcontroller.
Preamplifier test device in the present embodiment controls the switch state of relay 2 by DSP module 4, make to
Amplifier 1 be in short circuit state and broken string state, and by the frequency signal of two states export to adopt frequency and 3 end of frequency dividing circuit
Carry out rectification and scaling down processing after send to again DSP module 4 analysis to amplifier 1 signal it is whether normal, may be implemented from
Dynamicization test can make test simpler instead of many and diverse method of original redundancy, improve working efficiency and save the cost.
Further, the preamplifier test device further includes connecting with DSP module 4, for showing test result
Display module 5, the display module 5 shows the visual result of analytical judgment；The display module 5 includes being used for
The LED display or LCD display of the specific value of display frequency signal and for display frequency signal it is whether normal
Traffic lights, specifically, in this example it is shown that module 5 includes red light and green light, if analysis show that frequency signal belongs to
Normal range (NR) then controls green light, and otherwise control red light is bright, if green light and red light are not to 1 no signal of amplifier
Bright, further, display module 5 further includes LCD display or LED display, for the specific value of display frequency, this
The benefit of sample setting is intuitively shown by display module 5, so that at a glance it can be seen that test result.
Further, the preamplifier test device further includes the pedestal placed to amplifier 1.
Testing procedure and principle are as follows:
S10: will be put into pedestal (not shown) to amplifier 1, be equipped in pedestal and be electrically connected with to amplifier 1
Interface.
S20: power supply such as 24V is accessed, the voltage of power supply is not limited in the present embodiment, device carries out initialization journey
Sequence.Specifically, in the present embodiment, relay 2 and display module 5 will do it an initialization.
S30: relay 2 is switched under the control of DSP module 4, realizes short circuit and broken string to amplifier 1, when
Process control relay 2 is connected to, and is in short circuit state to amplifier 1, when relay 2 is not connected to, is in amplifier 1
Broken string state.
S40: the frequency signal exported to amplifier 1 under two states is rectified by adopting frequency division frequency circuit 3, is divided
Frequency is handled；Specifically, in the present embodiment, adopting frequency and frequency dividing circuit 3 including adopting frequency circuit and frequency dividing circuit, adopting frequency circuit will connect
The frequency signal received carries out rectification processing, then carries out scaling down processing by frequency dividing circuit again.
S50: being captured through the processed frequency signal of S40 by DSP module 4, specifically, in the present embodiment, DSP module 4
For dsp chip, and finally judge whether the frequency signal belongs to normal range (NR), controls display module 5 if normal.
Refering to Fig. 4, Fig. 4 is the schematic diagram for the preamplifier test device that the application second embodiment provides；The application
Embodiment provides a kind of preamplifier test device, comprising: relay 2 adopts frequency and frequency dividing circuit 3, DSP module 4；
Relay 2 in the present embodiment includes two, and respectively the first relay 20 and the second relay 22 include a
Port, the port b, the port c, the port d can generate electromagnetic force, the elastic slice of the port electromagnetic attracting force d when the port a and the connection of the port b
201,221 close to the port c；Electromagnetic force will not be generated when the port a and the port b are disconnected, the elastic slice 201,221 of the port d is far from c
Both ports are not turned on.
The port d of the input port to amplifier 1 and first relay 20 is electrically connected；
The port b of the output end of the DSP module 4 and first relay 20 is electrically connected, first relay
20 port a, c ground connection；Specifically, in the present embodiment, the shell to amplifier 1 is ground state, it is only necessary to by first
The shell to amplifier 1 is accessed in the port c of relay 20.
The input port to amplifier 1 is also electrically connected with the port d of second relay 22；
The output end of the DSP module 4 is also electrically connected with the port b of second relay 22, second relay
The port a of device 22 is grounded, and the port c does not connect anything, is in broken string state；
The DSP module 4 is connected with the port b by the port a of the first relay 20 described in process control and generates electromagnetic force,
It controls the port a of second relay 22 simultaneously and the port b is disconnected, the elastic slice 201 and c of the port the electromagnetic attracting force d
Port is electrically connected to form short-circuit, at this time to amplifier 1 belong to short circuit state or
The DSP module 4 is connected with the port b by the port a of the second relay 22 described in process control and generates electromagnetic force,
Electromagnetic force is connected with the port b and generated in the port a for controlling first relay 20 simultaneously, the port the electromagnetic attracting force d
Elastic slice 221 and the port c, which are electrically connected at, forms broken string circuit to the external of amplifier 1, belongs to broken string to amplifier 1 at this time
State；The benefit being arranged so only needs to change the program of DSP module 4 when wherein the second relay 22 breaks down
Then it is tested, specifically, circuit diagram is identical as the circuit diagram in first embodiment at this time, the program of DSP module 4 is changed to
Program identical with first embodiment.
The output port to amplifier 1 and one end electric connection for adopting frequency and frequency dividing circuit 3, it is described to adopt frequency
It is electrically connected with the other end of frequency dividing circuit 3 and the DSP module 4, it is described to adopt the tool of frequency and frequency dividing circuit 3 including sequential series
Have rectification function adopts frequency circuit and the frequency dividing circuit with division function, receives the short circuit frequency exported to amplifier 1
Rate signal or broken string frequency signal, and the DSP module 4 is delivered to after over commutation and scaling down processing；Specifically, adopting frequency and dividing
Frequency circuit 3 receives the different frequency signals transmitted when amplifier 1 is in different conditions, frequency letter when including broken string state
Number, frequency signal when being shorted state, send DSP module to after the frequency signal received the processing such as to be rectified to, divided
4。
The DSP module 4 adopts the short circuit frequency to amplifier 1 that frequency and frequency dividing circuit 3 export described in receiving
Signal or broken string frequency signal, export after being analyzed and determined.
Specifically, in the present embodiment, DSP module 4 is dsp chip；Optionally, in some other embodiments, DSP core
Piece can be replaced with single-chip microcontroller.Preamplifier test device in the present embodiment by DSP module 4 control relay 2 (including
Two: be respectively relay 20 and relay 22) switch state, make to be in short circuit state and broken string state to amplifier 1,
And by the frequency signal of two states export to adopt frequency and 3 end of frequency dividing circuit carry out rectification and scaling down processing after send DSP to again
Whether the analysis of module 4 is normal to the signal of amplifier 1, and analysis result is delivered to external display module 5 and is carried out intuitively
It has been shown that, may be implemented automatic test, instead of many and diverse method of original redundancy, test can be made simpler, improve working efficiency
And save the cost.
Further, the preamplifier test device further includes connecting with DSP module 4, for showing test result
Display module 5；Further, the display module include for the specific value of display frequency signal LED display or
Person's LCD display and for the whether normal traffic lights of display frequency signal specifically, in this example it is shown that module packet
The display of red light green light is included, while also including the display of LCD display or LED display, specifically, traffic lights is aobvious
Show be in order to intuitively see frequency judgement it is normal whether information, for example, if analyze show that frequency signal belongs to normally
Range then controls green light, and otherwise control red light is bright, if to 1 no signal of amplifier, green light and red light all do not work；And
The display of LCD display or LED display is the specific value in order to see frequency, and the benefit being arranged in this way is to pass through display
Module 5 is intuitively shown, so that at a glance it can be seen that test result.
Further, the preamplifier test device further includes the pedestal placed to amplifier 1.
Testing procedure and principle are as follows:
S10: will be put into pedestal (not shown) to amplifier 1, be equipped in pedestal and be electrically connected with to amplifier 1
Interface.
S20: power supply such as 24V is accessed, the voltage of power supply is not limited in the present embodiment, device carries out initialization journey
Sequence.Specifically, in the present embodiment, relay 20, relay 22 and display module 5 will do it an initialization.
S30: relay 20 and relay 22 are switched under the control of DSP module 4, are realized to the short of amplifier 1
Connect and break, when relay 20 open be connected to, when other relays 22 are turned off, be in short circuit state to amplifier 1, when after
When electric appliance 22 opens connection, when other relays 20 are turned off, broken string state is in amplifier 1.
S40: under two states to amplifier 1 export frequency signal by adopt frequency and frequency dividing circuit 3 rectified,
Scaling down processing；Specifically, in the present embodiment, adopting frequency and frequency dividing circuit 3 including adopting frequency circuit and frequency dividing circuit, adopting frequency circuit will
The frequency signal received carries out rectification processing, then carries out scaling down processing by frequency dividing circuit again.
S50: being captured through the processed frequency signal of S40 by DSP module 4, specifically, in the present embodiment, DSP module 4
For dsp chip, and finally judge whether the frequency signal belongs to normal range (NR), controls display module 5 if normal.
Compared with prior art, preamplifier test device provided by the embodiments of the present application has the advantages that
By 4 procedure auto-control of DSP module, 1 relay 2 or two relays 20,22, to amplifier 1
Outside forms short-circuit or broken string circuit, makes to be in short circuit state or broken string state to amplifier 1, will be to amplifier 1
The different frequency signals of output, including broken string when frequency signal, be shorted when frequency signal, through adopting frequency and frequency dividing circuit 3
It is collected and sends DSP module 4 to after over commutation, frequency dividing, whether DSP module 4 is normal to signal progress discriminatory analysis, and
The result of test is intuitively shown finally by display module 5；
It only needs to connect to amplifier 1, it will be able to be tested, test is easy, and the speed of test quickly, and can
Intuitively test whether to pass through from display module 5.
Obviously, embodiments described above is merely a part but not all of the embodiments of the present application, attached
The preferred embodiment of the application is given in figure, but is not intended to limit the scope of the patents of the application.The application can be with many differences
Form realize, on the contrary, purpose of providing these embodiments is keeps the understanding to disclosure of this application more thorough
Comprehensively.Although the application is described in detail with reference to the foregoing embodiments, for coming for those skilled in the art,
Can still modify to technical solution documented by aforementioned each specific embodiment, or to part of technical characteristic into
Row equivalence replacement.All equivalent structures done using present specification and accompanying drawing content, are directly or indirectly used in other
Relevant technical field, similarly within the application scope of patent protection.
Claims (10)
1. a kind of preamplifier test device, for detecting the performance to amplifier characterized by comprising relay,
Adopt frequency and frequency dividing circuit, DSP module；
The relay includes the port a, the port b, the port c and the port d；
The port d of the input port to amplifier and the relay is electrically connected；
The output port to amplifier is electrically connected with the Single port for adopting frequency and frequency dividing circuit, described to adopt frequency and divide
The another port of frequency circuit is connect with one end of the DSP module electrical property, the other end of the DSP module and the relay
The port a is electrically connected, the port b of the relay, the port c ground connection；
The DSP module is connected with the port b by the port a of relay described in process control and generates electromagnetic force, the electromagnetic force
The elastic slice and the port c for attracting the port d are electrically connected to form short-circuit, or
The DSP module disconnects release electromagnetic force by the port a of relay described in process control and the port b, then the port d
Elastic slice and the port c disconnect be electrically connected to form broken string circuit；
The DSP module will receive described in adopt frequency and frequency dividing circuit output to the short circuit frequency signal of amplifier or disconnected
Line frequency signal exports after being analyzed and determined.
2. preamplifier test device according to claim 1, which is characterized in that it is described adopt frequency and frequency dividing circuit include
Sequential series adopt frequency circuit and the frequency dividing circuit with division function with rectification function, receive described defeated to amplifier
Short circuit frequency signal or broken string frequency signal out, and the DSP module is delivered to after over commutation and scaling down processing.
3. preamplifier test device according to claim 1, which is characterized in that the amplifier test device is also wrapped
Include the display module connecting with DSP module, for showing test result.
4. preamplifier test device according to claim 3, which is characterized in that the display module includes for showing
Show the LED display or LCD display and whether normal red for display frequency signal of the specific value of frequency signal
Green light.
5. preamplifier test device according to claim 4, which is characterized in that the DSP module is dsp chip.
6. a kind of preamplifier test device, for detecting the performance to amplifier characterized by comprising relay,
Adopt frequency and frequency dividing circuit, DSP module；
Relay includes two, respectively the first relay and the second relay；
Described two relays include the port a, the port b, the port c and the port d；
The port d of the input port to amplifier and first relay is electrically connected；
The output port to amplifier is electrically connected with the Single port for adopting frequency and frequency dividing circuit, described to adopt frequency and divide
The another port of frequency circuit is connect with one end of the DSP module electrical property, the output end of the DSP module and first relay
The port b of device is electrically connected, the port a of first relay, the port c ground connection；
The input port to amplifier is also electrically connected with the port d of second relay；
The output end of the DSP module is also electrically connected with the port b of second relay, the end a of second relay
Mouth ground connection, the port c do not connect anything, are in broken string state；
The DSP module is connected with the port b by the port a of the first relay described in process control and generates electromagnetic force, same to time control
The port a and the port b for making second relay are disconnected, and the elastic slice of the port the electromagnetic attracting force d and the port c are electrically connected
Formed short-circuit, at this time to amplifier belong to short circuit state or
The DSP module is connected with the port b by the port a of the second relay described in process control and generates electromagnetic force, same to time control
The port a and the port b for making first relay are disconnected, and the elastic slice of the port the electromagnetic attracting force d and the port c are electrically connected
Form broken string circuit；
The DSP module will receive described in adopt frequency and frequency dividing circuit output to the short circuit frequency signal of amplifier or disconnected
Line frequency signal exports after being analyzed and determined.
7. preamplifier test device according to claim 6, which is characterized in that it is described adopt frequency and frequency dividing circuit include
Sequential series adopt frequency circuit and the frequency dividing circuit with division function with rectification function, receive described defeated to amplifier
Short circuit frequency signal or broken string frequency signal out, and the DSP module is delivered to after over commutation and scaling down processing.
8. preamplifier test device according to claim 6, which is characterized in that the amplifier test device is also wrapped
Include the display module connecting with DSP module, for showing test result.
9. preamplifier test device according to claim 8, which is characterized in that the display module includes for showing
Show the LED display or LCD display and whether normal red for display frequency signal of the specific value of frequency signal
Green light.
10. preamplifier test device according to claim 9, which is characterized in that the DSP module is dsp chip.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821820485.9U CN209417224U (en) | 2018-11-06 | 2018-11-06 | A kind of preamplifier test device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201821820485.9U CN209417224U (en) | 2018-11-06 | 2018-11-06 | A kind of preamplifier test device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN209417224U true CN209417224U (en) | 2019-09-20 |
Family
ID=67932898
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201821820485.9U Active CN209417224U (en) | 2018-11-06 | 2018-11-06 | A kind of preamplifier test device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN209417224U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806532A (en) * | 2019-11-25 | 2020-02-18 | 昆明理工大学 | Pre-amplifier detection system of EH4 |
-
2018
- 2018-11-06 CN CN201821820485.9U patent/CN209417224U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN110806532A (en) * | 2019-11-25 | 2020-02-18 | 昆明理工大学 | Pre-amplifier detection system of EH4 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104144236B (en) | A kind of antenna for mobile phone use state detects circuit | |
| CN102970051A (en) | Anti-interference wireless communication system | |
| CN209417224U (en) | A kind of preamplifier test device | |
| CN204244219U (en) | A kind of telecommunication circuit detecting RS485 interface voltage | |
| CN102854847A (en) | Electrical appliance management system and electrical appliance management method thereof | |
| CN108540172B (en) | Handheld performance monitoring system and monitoring method for electricity consumption information acquisition system | |
| CN105337126A (en) | Power source line device with intelligent plug | |
| CN205986855U (en) | Radio frequency device and data transmission system | |
| CN205157644U (en) | Multiloop ammeter | |
| CN209312185U (en) | A kind of electrical fire monitoring device of accessible cloud platform | |
| CN201601759U (en) | Television voice control system and television using the voice control system | |
| CN207053780U (en) | Bluetooth equipment test system | |
| CN206906471U (en) | A kind of aerator monitoring system | |
| CN206649657U (en) | A kind of power supply unit electricity charge acquisition system | |
| CN205826811U (en) | A kind of aging testing system | |
| CN211603415U (en) | Transformer substation operation and maintenance cable insulation monitoring system | |
| CN205301405U (en) | Novel digital power frequency virtual value multimeter of low -power consumption | |
| CN201298754Y (en) | Integral 10kv carrier communication intelligent switch | |
| CN211018405U (en) | Ring main unit monitoring device | |
| CN209055644U (en) | A kind of device of multi-mode battery capacity indication | |
| CN206684269U (en) | Test board weighs electrifying device automatically | |
| CN206195774U (en) | Eight two -way passageway module MTRX of radio frequency | |
| CN107065635A (en) | A kind of intelligent automation control system | |
| CN207036335U (en) | A kind of acquisition and analysis instrument circuit board | |
| CN207968519U (en) | A kind of intelligent network test equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |