CN201008136Y - Power amplifier and loading output detecting apparatus - Google Patents
Power amplifier and loading output detecting apparatus Download PDFInfo
- Publication number
- CN201008136Y CN201008136Y CNU2006201522052U CN200620152205U CN201008136Y CN 201008136 Y CN201008136 Y CN 201008136Y CN U2006201522052 U CNU2006201522052 U CN U2006201522052U CN 200620152205 U CN200620152205 U CN 200620152205U CN 201008136 Y CN201008136 Y CN 201008136Y
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- circuit
- power amplifier
- interface
- control
- control circuit
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Abstract
The utility model relates to a power amplifier and load output detecting device, which belongs to electric appliance field and comprises a box body and an inner control circuit. The main technique point is that the control circuit comprises an SCM, an A/D transferring circuit, a switch off control circuit and a sampling interface circuit, wherein the output end of the sampling interface circuit is connected with the switch off control circuit, the output end of the switch off control circuit is connected with the A/D transferring circuit, the output end of the A/D transferring circuit is connected with an I/O interface of the SCM, the control interface of the SCM is connected with control interface of the switch off control circuit, and the communication interface of the SCM is connected with a communication interface circuit. The utility model is reasonable in design, wherein the control circuit accomplishes the power amplifier and load output detecting function and auto switch off between the master power amplifier and spare power amplifier via a master power amplifier, which saves investment and improves system performance and reliability. At the same time, the utility model provides an RS485 communication interface, which is convenient for scene employment and of extensive employment range.
Description
Technical field
The utility model belongs to electronic device field, especially a kind of power amplifier and load output checkout gear.
Background technology
Power amplifier is an important equipment in the passenger traffic broadcasting system, to directly influence the operate as normal of passenger traffic broadcasting system in case power amplifier work is undesired, therefore, in present passenger traffic broadcasting system is all to adopt active and standby two cover power amplifiers mostly, when the power amplifier that is moving breaks down, by manual switching mode standby power amplifier is linked in the passenger traffic broadcasting system, this mode all is after the system failure takes place by a period of time, could find to break down, therefore, this system construction mode can not find in time whether power amplifier fault has taken place, and, this employing manual switching mode can not be fast handling failure in time, cause the passenger traffic broadcasting system normally not resume work, influence the normal broadcasting of passenger-traffic system and commander and work such as dredge.
Summary of the invention
The purpose of this utility model is to overcome the deficiencies in the prior art, the power amplifier and the load output checkout gear that provide a kind of reasonable in design, can carry out fault detect to power amplifier.
The utility model solves its technical problem and takes following technical scheme to realize:
This power amplifier and load output checkout gear, constitute by casing and inner control circuit thereof, it is characterized in that: control circuit is made of single-chip microcomputer, A/D change-over circuit, control switching circuit, sampling interface circuit, the output of this sampling interface circuit is connected to control switching circuit, the output of this control switching circuit is connected to the A/D change-over circuit, the output of this A/D change-over circuit is connected to the I/O interface of single-chip microcomputer, the control mouth of this single-chip microcomputer is connected to the control mouth of control switching circuit, and the port of this single-chip microcomputer is connected with communication interface circuit.
And described sampling interface circuit comprises prime sampling interface circuit, power amplifier sampling interface circuit and service area sampling interface circuit.
And described single-chip microcomputer is the AT89C51 chip, and described A/D change-over circuit adopts the ADC0809 chip, and described control switching circuit is made up of 3 MC14051 chips, and described communication interface circuit adopts the RS485 communication protocol interface.
Advantage of the present utility model and good effect are:
1. this device is reasonable in design, on the basis that does not increase power amplifier, power amplifier finished by control circuit and load is exported measuring ability and will be led the automatic switchover of using between power amplifier and the non-firm power amplifier by main control computer, this mode is not provided with fixing guest machine, so long as the power amplifier that does not have at present to use all is a guest machine, therefore saved investment, and, the Performance And Reliability of system improved.
2. whether this device can judge exactly whether power amplifier breaks down, also can judge service area and open a way and short circuit, can accurately and timely find fault, handling failure, guarantees the normal operation of passenger traffic broadcasting system effectively.
3. the communication interface of this device has adopted the RS485 communication interface, long transmission distance, convenient on-the-spot use, applied widely.
Description of drawings
Fig. 1 is a casing front panel schematic diagram of the present utility model;
Fig. 2 is a cabinet rear panel schematic diagram of the present utility model;
Fig. 3 is a control circuit block diagram of the present utility model.
Embodiment
Below in conjunction with accompanying drawing the utility model embodiment is further described:
This power amplifier and load output checkout gear, constitute by casing and inner control circuit thereof, on the casing front panel, there is LED to detect sign 1 and mains switch 2, supply socket 8 is arranged on cabinet rear panel, insurance 7, passenger traffic broadcasting power amplifier output interface 3, pre-amplifier output interface 4, service area output interface 5, RS485 communication interface 6.Be packed in the interior control circuit of casing by single-chip microcomputer, communication interface circuit, the A/D change-over circuit, control switching circuit, the sampling interface circuit constitutes, wherein, single-chip microcomputer adopts the AT89C51 chip, the A/D change-over circuit adopts the ADC0809 chip, control switching circuit is made up of 3 MC14051 chips, communication interface circuit adopts the RS485 communication protocol interface, the sampling interface circuit comprises prime sampling interface circuit, power amplifier sampling interface circuit and service area sampling interface circuit, 3 sampling interface circuits respectively with the pre-amplifier output interface, passenger traffic broadcasting power amplifier output interface and service area output interface are connected, the output of 3 sampling interface circuits is connected respectively to control switching circuit, the output of this control switching circuit is connected to the A/D change-over circuit, the output of this A/D change-over circuit is connected to the I/O interface of single-chip microcomputer, the control mouth of this single-chip microcomputer is connected to the control mouth of control switching circuit, and the port of this single-chip microcomputer is connected to communication interface circuit.
Operation principle of the present utility model is:
This power amplifier and load output checkout gear are to move under the control of single-chip microcomputer.The output signal of pre-amplifier, the output signal of power amplifier and the signal of service area are delivered to control switching circuit after handling by the sampling interface circuit, control switching circuit is under the control of single-chip microcomputer, select road signal wherein, and this road signal become digital signal by the A/D change-over circuit with analog signal conversion, deliver to single-chip microcomputer, single-chip microcomputer performs mathematical calculations by the digital signal of internal processes with sample conversion, whether judge power amplifier and pre-amplifier breaks down, whether also can judge service area opens a way and short circuit, if above-mentioned fault takes place, single-chip microcomputer can send the respective coding signal to main control computer by the RS485 interface circuit, after main control computer is received code signal, send signal and notify switch controller that the power amplifier that breaks down is switched to the non-firm power amplifier to switch controller again, this mode does not adopt fixing standby host form, so long as the power amplifier that does not have at present to use can be used as the standby host use.
Embodiment described in the utility model is illustrative; rather than it is determinate; therefore the utility model is not limited to the embodiment described in the embodiment; every by those skilled in the art according to other execution modes that the technical solution of the utility model draws, belong to protection range of the present utility model equally.
Claims (3)
1. power amplifier and load output checkout gear, constitute by casing and inner control circuit thereof, it is characterized in that: control circuit is made of single-chip microcomputer, A/D change-over circuit, control switching circuit, sampling interface circuit, the output of this sampling interface circuit is connected to control switching circuit, the output of this control switching circuit is connected to the A/D change-over circuit, the output of this A/D change-over circuit is connected to the I/O interface of single-chip microcomputer, the control mouth of this single-chip microcomputer is connected to the control mouth of control switching circuit, and the port of this single-chip microcomputer is connected with communication interface circuit.
2. power amplifier according to claim 1 and load output checkout gear is characterized in that: described sampling interface circuit comprises prime sampling interface circuit, power amplifier sampling interface circuit and service area sampling interface circuit.
3. power amplifier according to claim 1 and load output checkout gear, it is characterized in that: described single-chip microcomputer is the AT89C51 chip, described A/D change-over circuit adopts the ADC0809 chip, described control switching circuit is made up of 3 MC14051 chips, and described communication interface circuit adopts the RS485 communication protocol interface.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201522052U CN201008136Y (en) | 2006-12-30 | 2006-12-30 | Power amplifier and loading output detecting apparatus |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CNU2006201522052U CN201008136Y (en) | 2006-12-30 | 2006-12-30 | Power amplifier and loading output detecting apparatus |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN201008136Y true CN201008136Y (en) | 2008-01-16 |
Family
ID=39004085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CNU2006201522052U Expired - Fee Related CN201008136Y (en) | 2006-12-30 | 2006-12-30 | Power amplifier and loading output detecting apparatus |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN201008136Y (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313828A (en) * | 2011-06-30 | 2012-01-11 | 重庆长安汽车股份有限公司 | Direct current converter electronic load used for hybrid vehicle |
| CN107102233A (en) * | 2017-06-16 | 2017-08-29 | 苏州美声电子有限公司 | Burn in process system for power amplifier |
-
2006
- 2006-12-30 CN CNU2006201522052U patent/CN201008136Y/en not_active Expired - Fee Related
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102313828A (en) * | 2011-06-30 | 2012-01-11 | 重庆长安汽车股份有限公司 | Direct current converter electronic load used for hybrid vehicle |
| CN107102233A (en) * | 2017-06-16 | 2017-08-29 | 苏州美声电子有限公司 | Burn in process system for power amplifier |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C14 | Grant of patent or utility model | ||
| GR01 | Patent grant | ||
| C19 | Lapse of patent right due to non-payment of the annual fee | ||
| CF01 | Termination of patent right due to non-payment of annual fee |