CN214481267U - Broadcast control box testing device - Google Patents
Broadcast control box testing device Download PDFInfo
- Publication number
- CN214481267U CN214481267U CN202120574440.3U CN202120574440U CN214481267U CN 214481267 U CN214481267 U CN 214481267U CN 202120574440 U CN202120574440 U CN 202120574440U CN 214481267 U CN214481267 U CN 214481267U
- Authority
- CN
- China
- Prior art keywords
- detection circuit
- audio
- control box
- test
- broadcast control
- 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
Images
Landscapes
- Testing Electric Properties And Detecting Electric Faults (AREA)
Abstract
The utility model provides a broadcast control box testing device, which comprises a main control unit, an audio output detection circuit, an audio input detection circuit, an emergency output detection circuit, a power management circuit and an input and display unit, wherein the power management circuit comprises an electrical parameter detection circuit and a power supply circuit; the input and display unit is connected with the main control unit and is used for inputting test parameters and test instructions and displaying the test parameters, the test instructions and test results; the main control unit is respectively connected with the audio output detection circuit, the audio input detection circuit, the emergency output detection circuit and the electrical parameter detection circuit and is used for controlling the audio output detection circuit, the audio input detection circuit, the emergency output detection circuit or the electrical parameter detection circuit to work according to the test parameters and the test instructions so as to realize the test of the tested broadcast control box.
Description
Technical Field
The utility model relates to a testing arrangement, specific theory has related to a broadcast control box testing arrangement.
Background
The broadcast control box belongs to a communication broadcast system and is used for backup broadcast, and the functions of the broadcast control box comprise manual multicast, voice synthesis, area selection and the like. Each line of the subway has a broadcast control box, the functions are similar approximately, and related interfaces are slightly different. At present, the equipment faces the condition of production reduction or production halt, and the failure rate of the equipment tends to increase; after the equipment is maintained, the test platform is not needed, the function of the equipment cannot be verified, the environment of the main line station needs to be used for testing, manpower is consumed, the maintenance time is prolonged, and the equipment maintenance efficiency is reduced.
In order to solve the above problems, people are always seeking an ideal technical solution.
Disclosure of Invention
The utility model aims at the not enough of prior art to a broadcast control box testing arrangement is provided.
In order to realize the purpose, the utility model discloses the technical scheme who adopts is: a testing device for a broadcast control box comprises a main control unit, an audio output detection circuit, an audio input detection circuit, an emergency output detection circuit, a power management circuit and an input and display unit,
the power management circuit comprises an electrical parameter detection circuit and a power supply circuit; the power supply circuit is used for supplying working voltage to the broadcast control box testing device and the broadcast control box to be tested; the electrical parameter detection circuit is used for collecting a voltage signal and a current signal of the broadcast control box to be tested;
the input and display unit is connected with the main control unit and is used for inputting test parameters and test instructions and displaying the test parameters, the test instructions and test results;
the audio output detection circuit is used for outputting different audio signals to the broadcast control box to be tested;
the audio input detection circuit is used for acquiring an audio input signal of the broadcast control box to be tested;
the emergency output detection circuit is used for acquiring an emergency output signal of the broadcast control box to be tested;
the main control unit is respectively connected with the audio output detection circuit, the audio input detection circuit, the emergency output detection circuit and the electrical parameter detection circuit, and is used for controlling the audio output detection circuit to output audio signals according to the test parameters and the test instructions, controlling the audio input detection circuit, the emergency output detection circuit or the electrical parameter detection circuit to acquire signals according to the test parameters and the test instructions, and judging the state of the tested broadcast control box according to the acquisition results of the audio input detection circuit, the emergency output detection circuit and the electrical parameter detection circuit.
Based on the above, the audio output detection circuit comprises a first audio operational amplifier and a first audio transformer which are sequentially connected, wherein the first audio operational amplifier receives the TF card audio signal or the recorded audio signal, amplifies the TF card audio signal or the recorded audio signal according to the reference voltage, and outputs the amplified TF card audio signal or the recorded audio signal to the first audio transformer; and the first audio transformer is used for carrying out secondary amplification on the amplified TF card audio signal or the audio signal after recording and then sending the amplified TF card audio signal or the audio signal to the tested broadcast control box.
Based on the above, the audio input detection circuit comprises a second audio transformer, a second audio operational amplifier, a multiplexer, a third audio operational amplifier and a loudspeaker which are connected in sequence, wherein the second audio transformer receives an audio signal output by the tested broadcast control box and transmits the audio signal to the second audio operational amplifier; the second audio operational amplifier amplifies the audio signal according to the reference voltage and sends the audio signal to the multiplexer through the amplitude limiting circuit; the multiplexer stores audio signals or sends the audio signals to the third audio operational amplifier for amplification according to switching signals issued by the main control unit, and the audio signals amplified by the third audio operational amplifier are sent to the loudspeaker for playing.
Based on the above, the emergency output detection circuit comprises a photoelectric coupler, and a cathode end of the photoelectric coupler is used for collecting and receiving the emergency output signal of the tested broadcast control box; the anode end of the photoelectric coupler receives comparison voltage; and the photoelectric coupler outputs a corresponding emergency output detection signal to the main control unit according to whether a positive voltage difference is generated between the cathode end and the anode end.
Based on the above, the electrical parameter detection circuit comprises a current detection circuit and a voltage detection circuit, the current detection circuit is used for collecting current signals of the broadcast control box to be tested, and the voltage detection circuit is used for collecting voltage signals of the broadcast control box to be tested; the power supply circuit comprises a 24V power supply circuit, a 24V to 5V power supply circuit and a 5V to 3.3V power supply circuit and is used for supplying various working voltages to the broadcast control box testing device and the tested broadcast control box.
Compared with the prior art, the utility model has substantive characteristics and progress, in particular to the utility model, the utility model is provided with a main control unit, an audio output detection circuit, an audio input detection circuit, an emergency output detection circuit, a power management circuit and an input and display unit, wherein, the power management circuit collects the voltage signal and the current signal of the tested broadcast control box; the input and display unit inputs the test parameters and the test instructions and displays the test parameters, the test instructions and the test results; the audio output detection circuit outputs different audio signals to the broadcast control box; the audio input detection circuit collects audio input signals of the broadcast control box to be tested; the emergency output detection circuit acquires an emergency output signal of the tested broadcast control box; the main control unit controls the circuit to work and judges the state of the broadcast control box to be tested according to the acquisition result of the circuit; when the broadcasting control box testing device is used, all functions of the broadcasting control box can be tested only by connecting the broadcasting box testing device with the broadcasting control box, the testing of the station environment of a main line is not needed, the labor is saved, the overhauling efficiency is improved, and the performance of the broadcasting control box after maintenance is guaranteed to be put into operation.
Drawings
Fig. 1 is a schematic block diagram of the present invention.
Fig. 2 is a schematic structural diagram of the present invention.
Fig. 3 is a schematic circuit diagram of the audio output detection circuit of the present invention.
Fig. 4 is a circuit diagram of the audio input detection circuit of the present invention.
Fig. 5 is a schematic circuit diagram of the emergency output detection circuit of the present invention.
Fig. 6 is a schematic circuit diagram of the current detection circuit of the present invention.
Fig. 7 is a schematic circuit diagram of the voltage detection circuit of the present invention.
In the figure: 1. a housing; 2. a display screen; 3. a power switch; 4. a test switch; 5. an emergency button; 6. a voice button; 7. a volume knob; 8. testing the key; 9. a data interface; 10. and a power interface.
Detailed Description
The technical solution of the present invention will be described in further detail through the following embodiments.
Example 1
The present embodiment provides a testing apparatus for a broadcast control box, as shown in fig. 1, comprising a main control unit, an audio output detection circuit, an audio input detection circuit, an emergency output detection circuit, a power management circuit, and an input and display unit,
the power management circuit comprises an electrical parameter detection circuit and a power supply circuit; the power supply circuit is used for supplying working voltage to the broadcast control box testing device; the electrical parameter detection circuit is used for collecting a voltage signal and a current signal of the broadcast control box to be tested;
the input and display unit is connected with the main control unit and is used for inputting test parameters and test instructions and displaying the test parameters, the test instructions and test results;
the audio output detection circuit is used for outputting different audio signals to the broadcast control box to be tested;
the audio input detection circuit is used for acquiring an audio input signal of the broadcast control box to be tested;
the emergency output detection circuit is used for acquiring an emergency output detection signal of the tested broadcast control box;
the main control unit is respectively connected with the audio output detection circuit, the audio input detection circuit, the emergency output detection circuit and the electrical parameter detection circuit, and is used for controlling the audio output detection circuit to output audio signals according to the test parameters and the test instructions, controlling the audio input detection circuit, the emergency output detection circuit or the electrical parameter detection circuit to acquire signals according to the test parameters and the test instructions, and judging the state of the tested broadcast control box according to the acquisition results of the audio input detection circuit, the emergency output detection circuit and the electrical parameter detection circuit.
In specific implementation, the electrical parameter detection circuit comprises a current detection circuit and a voltage detection circuit, the current detection circuit is used for collecting current signals of the broadcast control box to be tested, and the voltage detection circuit is used for collecting voltage signals of the broadcast control box to be tested; the power supply circuit comprises a 24V power supply circuit, a 24V to 5V power supply circuit and a 5V to 3.3V power supply circuit and is used for supplying various working voltages to the broadcast control box testing device and the tested broadcast control box.
In specific implementation, as shown in fig. 2, the broadcast control box testing apparatus further includes a casing 1, and the main control unit, the audio output detection circuit, the audio input detection circuit, the emergency output detection circuit, and the power management circuit are disposed in the casing 1; the shell is provided with a power switch 3, the input and display unit, a power interface 10 and a data interface 9, and the power switch 3 is connected with the power supply circuit and used for connecting the power supply circuit; the power interface 10 is connected with the power management circuit and is used for supplying power to the broadcast control box to be tested and collecting voltage and current signals of the broadcast control box to be tested; the data interface 9 is connected to the audio output detection circuit, the audio input detection circuit, and the emergency output detection circuit, respectively, and is configured to perform data communication.
In specific implementation, the input and display unit comprises a display screen 2, a test switch 4, an emergency button 5, a voice button 6, a test key 8 and a volume knob 7, wherein the test switch 4 is used for inputting an electrical parameter test instruction to the main control unit; the emergency button 5 is used for inputting an emergency test instruction to the main control unit;
the voice button 6 is used for inputting a broadcast function test activation instruction to the main control unit; the test key 8 comprises an interface broadcast test key, a prerecorded broadcast test key and a monitoring test key, wherein the interface broadcast test key is used for sending an interface broadcast test instruction to the main control unit, the prerecorded broadcast test key is used for sending a prerecorded broadcast test instruction to the main control unit, and the monitoring test key is used for sending a monitoring test instruction to the main control unit;
the volume knob 7 is connected with the audio input detection circuit and is used for adjusting the playing volume of the audio input detection circuit;
the display screen 2 is connected with the main control unit and used for displaying data.
At present, the function of the tested broadcast control box is briefly described as follows:
1. emergency broadcasting: pressing the "emergency" key causes the microphone to broadcast voice, (in this case, the broadcast area is the entire broadcast area).
2. Sowing at mouth:
and (3) carrying out the oral broadcasting operation on the 01 area, firstly clicking the numerical keys of '0' and '1' (selecting the 01 area, and also pressing the 'full-on' to select the whole broadcasting area), and then pressing the 'microphone' key to carry out the broadcasting talk.
3. Pre-recording broadcast:
the area 01 is pre-recorded and broadcasted, the number keys of '0' and '1' are clicked firstly (the area 01 is selected, if all the broadcasting areas are selected, the 'full-on' key is pressed), then the 'voice' key is pressed, then the pre-recorded voice number to be played is selected, for example, 01, and then the 'function' key is pressed for broadcasting.
4. Monitoring: if monitoring is needed after voice playing, the 'voice' key is pressed, then the number of the broadcast area (such as the area 01) is selected, the '0' and the '1' are pressed, the broadcast condition of the area 01 can be monitored, and the monitoring can be closed by pressing the 'voice' key.
The testing procedure of the existing broadcast control box by using the broadcast control box testing device of the embodiment is as follows:
1. the broadcast control box testing device is connected with the broadcast control box to be tested through a power interface 10 and a data interface 9, and the broadcast control box testing device supplies power and communicates data to the broadcast control box to be tested.
2. And pressing a button of a test switch 4 to start the operation of the broadcast control box test device, controlling a current detection circuit and a voltage detection circuit of the broadcast control box test device to sequentially detect the voltage signal and the current signal of the broadcast control box to be tested, and recording and storing data. Normally, the voltage signal and the current signal have a proper range, and if the current signal is too large or too small, the internal fault of the tested broadcast control box is indicated. The current of the broadcast control box to be tested is automatically controlled, and when the current is too large and is larger than a set current limiting value, the testing device automatically cuts off the power supply of the testing circuit, so that the fault range is prevented from being enlarged.
3. Testing emergency broadcasting functions: and when the emergency button 5 is pressed, the emergency output detection circuit of the broadcast control box testing device starts to work, and operates the tested broadcast control box to carry out emergency broadcast, and the emergency output signal of the tested broadcast control box is detected through the emergency output detection circuit of the broadcast control box testing device.
4. Testing the oral sowing function: and pressing an oral broadcast test key in the test key 8, starting the audio input detection circuit of the broadcast control box test device to work, operating the tested broadcast control box to carry out oral broadcast, and detecting whether the audio input of the tested broadcast control box is normal or not through the audio input detection circuit of the broadcast control box test device.
5. Pre-recording broadcast test: pressing a prerecorded broadcast test key in the test keys 8, starting an audio output detection circuit of the broadcast control box test device to work, and outputting different audio signals to a tested broadcast control box; and operating the tested broadcast control box to perform pre-recorded broadcast, and observing the audio condition of the loudspeaker on the tested broadcast control box so as to determine whether the pre-recorded broadcast function of the tested broadcast control box is normal.
6. And (3) testing the monitoring function: the monitoring test key in the test key 8 is pressed, the audio output detection circuit of the broadcast control box test device starts working, different audio signals are output to the tested broadcast control box, the tested broadcast control box is operated to carry out monitoring function test, the audio condition of the loudspeaker is observed on the tested broadcast control box, and then whether the area selection function and the monitoring function of the tested broadcast control box are normal is determined.
Example 2
This example differs from example 1 in that: as shown in fig. 3, the audio output detection circuit includes a first audio operational amplifier and a first audio transformer, which are connected in sequence, specifically, a positive input terminal of the first audio operational amplifier is connected to a reference voltage, and a negative input terminal of the first audio operational amplifier receives a TF card audio signal or a recorded audio signal through a resistor and a limiting circuit; the output end of the first audio operational amplifier is connected with the first audio transformer, and the output end of the first audio operational amplifier is also connected with the negative input end of the first audio operational amplifier through a feedback resistor.
When the first audio operational amplifier is used, the first audio operational amplifier receives TF card audio signals or recorded audio signals, amplifies the TF card audio signals or the recorded audio signals according to reference voltage and outputs the amplified TF card audio signals or the recorded audio signals to the first audio transformer; and the first audio transformer is used for carrying out secondary amplification on the amplified TF card audio signal or the audio signal after recording and then sending the amplified TF card audio signal or the audio signal to the tested broadcast control box.
As shown in fig. 4, the audio input detection circuit includes a second audio transformer, a second audio operational amplifier, a multiplexer, a third audio operational amplifier, and a speaker, which are connected in sequence, specifically, an input end of the second audio transformer is connected to the broadcast control box to be tested, an output end of the second audio transformer is connected to a negative input end of the second audio operational amplifier, and a positive input end of the second audio operational amplifier is connected to a reference voltage; the output end of the second audio operational amplifier is connected with the common through end of the multiplexer through a limiting circuit, and a first channel of the multiplexer is connected with the negative input end of the third audio operational amplifier; the output end of the third audio operational amplifier is connected with the loudspeaker; the second channel of the multiplexer outputs the audio signal for storage; the selection end of the multiplexer is also connected with the main control unit and is used for receiving the enabling switching signal sent by the main control unit.
When the audio frequency transformer is used, the second audio frequency transformer receives the audio frequency signal output by the tested broadcast control box and transmits the audio frequency signal to the second audio frequency operational amplifier; the second audio operational amplifier amplifies the audio signal according to the reference voltage and sends the audio signal to the multiplexer through the amplitude limiting circuit; the multiplexer stores audio signals according to switching signals sent by the main control unit or sends the audio signals to the third audio operational amplifier for amplification, and the audio signals amplified by the third audio operational amplifier are sent to the loudspeaker for playing.
As shown in fig. 5, the emergency output detection circuit includes a photo coupler, and a cathode terminal of the photo coupler is used for receiving an emergency output signal of the broadcast control box to be tested; the anode end of the photoelectric coupler is connected with a power supply voltage through a light-emitting diode and a current-limiting resistor; the anode end of the photoelectric coupler is also connected with a power supply voltage through a shunt resistor; the collecting electrode of the photoelectric coupler is connected with 3.3V direct current voltage through a pull-up resistor, and the connecting point of the collecting electrode of the photoelectric coupler and the pull-up resistor is also used as the output end of the emergency output detection circuit to output an emergency output signal to the main control unit.
When the test device is used, the cathode end of the photoelectric coupler is used for collecting and receiving emergency output signals of the broadcast control box to be tested; the anode end of the photoelectric coupler receives comparison voltage; and the photoelectric coupler outputs a corresponding emergency output detection signal to the main control unit according to whether a positive voltage difference is generated between the cathode end and the anode end.
As shown in fig. 6, the current detection circuit includes a first operational amplifier, positive and negative input terminals of the first operational amplifier are respectively connected to PGND and GND, and an output terminal of the first operational amplifier is connected to the main control unit through an RC filter circuit to provide a current measurement value to the main control unit; the output end of the first operational amplifier is also connected with the negative input end of the first operational amplifier through a feedback resistor.
As shown in fig. 7, the voltage detection circuit includes a second operational amplifier, a 24V supply voltage is connected to a positive input terminal of the second operational amplifier through a divided current, and an output terminal of the second operational amplifier is connected to the main control unit through an RC filter circuit to provide a voltage measurement value to the main control unit; and the output end of the second operational amplifier is also directly connected with the negative input end of the second operational amplifier in a feedback manner.
Example 3
This embodiment provides a specific embodiment, in which the first audio operational amplifier, the second audio operational amplifier, and the third audio operational amplifier are MC4558 operational amplifiers; the first audio transformer and the second audio transformer are both LY-2450 transformers; the first operational amplifier and the second operational amplifier are both MCP 6002; the multiplexer adopts an analog test switch SN74LV1G3157 multiplexer; the photoelectric coupler adopts an EL357N coupler; the amplitude limiting circuit is formed by reversely connecting two diodes in parallel.
Finally, it should be noted that the above embodiments are only used for illustrating the technical solutions of the present invention and not for limiting the same; although the present invention has been described in detail with reference to preferred embodiments, it should be understood by those skilled in the art that: the invention can be modified or equivalent substituted for some technical features; without departing from the spirit of the present invention, it should be understood that the scope of the claims is intended to cover all such modifications and variations.
Claims (9)
1. The utility model provides a broadcast control box testing arrangement which characterized in that: comprises a main control unit, an audio output detection circuit, an audio input detection circuit, an emergency output detection circuit, a power management circuit and an input and display unit,
the power management circuit comprises an electrical parameter detection circuit and a power supply circuit; the power supply circuit is used for supplying working voltage to the broadcast control box testing device and the broadcast control box to be tested; the electrical parameter detection circuit is used for collecting a voltage signal and a current signal of the broadcast control box to be tested;
the input and display unit is connected with the main control unit and is used for inputting test parameters and test instructions and displaying the test parameters, the test instructions and test results;
the audio output detection circuit is used for outputting different audio signals to the broadcast control box to be tested;
the audio input detection circuit is used for acquiring an audio input signal of the broadcast control box to be tested;
the emergency output detection circuit is used for acquiring an emergency output detection signal of the tested broadcast control box;
the main control unit is respectively connected with the audio output detection circuit, the audio input detection circuit, the emergency output detection circuit and the electrical parameter detection circuit, and is used for controlling the audio output detection circuit to output audio signals according to the test parameters and the test instructions, controlling the audio input detection circuit, the emergency output detection circuit or the electrical parameter detection circuit to acquire signals according to the test parameters and the test instructions, and judging the state of the tested broadcast control box according to the acquisition results of the audio input detection circuit, the emergency output detection circuit and the electrical parameter detection circuit.
2. The broadcast control box test apparatus of claim 1, wherein: the audio output detection circuit comprises a first audio operational amplifier and a first audio transformer which are sequentially connected, wherein the first audio operational amplifier receives a TF card audio signal or a recording audio signal, amplifies the TF card audio signal or the recording audio signal according to a reference voltage and outputs the TF card audio signal or the recording audio signal to the first audio transformer; and the first audio transformer is used for carrying out secondary amplification on the amplified TF card audio signal or the audio signal after recording and then sending the amplified TF card audio signal or the audio signal to the tested broadcast control box.
3. The broadcast control box test apparatus of claim 1, wherein: the audio input detection circuit comprises a second audio transformer, a second audio operational amplifier, a multiplexer, a third audio operational amplifier and a loudspeaker which are sequentially connected, wherein the second audio transformer receives an audio signal output by the tested broadcast control box and transmits the audio signal to the second audio operational amplifier; the second audio operational amplifier amplifies the audio signal according to the reference voltage and sends the audio signal to the multiplexer through the amplitude limiting circuit; the multiplexer stores audio signals according to switching signals sent by the main control unit or sends the audio signals to the third audio operational amplifier for amplification, and the audio signals amplified by the third audio operational amplifier are sent to the loudspeaker for playing.
4. The broadcast control box test apparatus of claim 1, wherein: the emergency output detection circuit comprises a photoelectric coupler, and the cathode end of the photoelectric coupler is used for collecting and receiving emergency output signals of the tested broadcast control box; the anode end of the photoelectric coupler receives comparison voltage; and the photoelectric coupler outputs a corresponding emergency output detection signal to the main control unit according to whether a positive voltage difference is generated between the cathode end and the anode end.
5. The broadcast control box test apparatus of claim 1, wherein: the electric parameter detection circuit comprises a current detection circuit and a voltage detection circuit, the current detection circuit is used for collecting current signals of the tested broadcast control box, and the voltage detection circuit is used for collecting voltage signals of the tested broadcast control box; the power supply circuit comprises a 24V power supply circuit, a 24V to 5V power supply circuit and a 5V to 3.3V power supply circuit and is used for supplying various working voltages to the broadcast control box testing device and the tested broadcast control box.
6. The broadcast control box test apparatus of claim 5, wherein: the current detection circuit comprises a first operational amplifier, the positive input end and the negative input end of the first operational amplifier are respectively connected with PGND and GND, and the output end of the first operational amplifier is connected with the main control unit through an RC filter circuit so as to provide a current measurement value for the main control unit.
7. The broadcast control box test apparatus of claim 5, wherein: the voltage detection circuit comprises a second operational amplifier, 24V power supply voltage is connected to the positive input end of the second operational amplifier through divided current, and the output end of the second operational amplifier is connected with the main control unit through an RC filter circuit so as to provide a voltage measurement value for the main control unit.
8. The broadcast control box test apparatus of claim 1, wherein: the input and display unit comprises a display screen, a test switch, an emergency button, a voice button, a test key and a volume knob, wherein the test switch is used for inputting an electrical parameter test instruction to the main control unit; the emergency button is used for inputting an emergency test instruction to the main control unit;
the voice button is used for inputting a broadcast function test activation instruction to the main control unit; the test key comprises an interface broadcast test key, a prerecorded broadcast test key and a monitoring test key, wherein the interface broadcast test key is used for sending an interface broadcast test instruction to the main control unit, the prerecorded broadcast test key is used for sending a prerecorded broadcast test instruction to the main control unit, and the monitoring test key is used for sending a monitoring test instruction to the main control unit;
the volume knob is connected with the audio input detection circuit and is used for adjusting the playing volume of the audio input detection circuit;
the display screen is connected with the main control unit and used for displaying data.
9. The broadcast control box test apparatus of claim 1, wherein: the broadcast control box testing device also comprises a shell, wherein the main control unit, the audio output detection circuit, the audio input detection circuit, the emergency output detection circuit and the power management circuit are arranged in the shell; the shell is provided with a power switch, the input and display unit, a power interface and a data interface, and the power switch is connected with the power supply circuit and used for connecting the power supply circuit; the power interface is connected with the power management circuit, and the data interface is respectively connected with the audio output detection circuit, the audio input detection circuit and the emergency output detection circuit.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120574440.3U CN214481267U (en) | 2021-03-19 | 2021-03-19 | Broadcast control box testing device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202120574440.3U CN214481267U (en) | 2021-03-19 | 2021-03-19 | Broadcast control box testing device |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN214481267U true CN214481267U (en) | 2021-10-22 |
Family
ID=78156916
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202120574440.3U Active CN214481267U (en) | 2021-03-19 | 2021-03-19 | Broadcast control box testing device |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN214481267U (en) |
-
2021
- 2021-03-19 CN CN202120574440.3U patent/CN214481267U/en active Active
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| US5467773A (en) | Cardiac patient remote monitoring using multiple tone frequencies from central station to control functions of local instrument at patient's home | |
| CN210042141U (en) | Wireless earphone, wireless earphone charging box and charging control system | |
| CN214481267U (en) | Broadcast control box testing device | |
| CN107135438A (en) | A kind of apparatus control method, apparatus and system | |
| CN208210192U (en) | Intelligent sound system | |
| CN111458579A (en) | Electrical test apparatus, electrical test method, electrical test device, electrical test apparatus, and storage medium | |
| CN111148008A (en) | Detection system and method for cable broadcasting system | |
| CN105872164B (en) | Patchcord, test result wiring method, device, mobile terminal and test macro | |
| CN108710282A (en) | A kind of children's wrist-watch | |
| US20190086893A1 (en) | Mobile power supply and voice prompting system and method thereof | |
| CN213239015U (en) | Portable power equipment sound wave detection analyzer | |
| CN208820987U (en) | The voice dialogue device of function is corrected with wrong word | |
| CN206948622U (en) | A kind of earphone continuation of the journey test device | |
| CN208110350U (en) | A kind of fire-fighting equipment power supply status monitor | |
| CN211576426U (en) | Artificial intelligent voice prompt wireless portable torque measurement system | |
| KR950014296B1 (en) | Line powered electronic controller | |
| CN214900886U (en) | Machine leads to control box test device based on performance test | |
| CN201611447U (en) | Device for processing on-site multi-metering signals | |
| CN201359618Y (en) | Wireless intelligent power consumption monitoring system | |
| CN212484514U (en) | Intelligent alarm of dull and stereotyped | |
| CN219244791U (en) | Hand-held acousto-optic detector | |
| KR102117162B1 (en) | Self-diagnosis type line test box | |
| CN215871523U (en) | Mobile terminal remote control system | |
| CN204989426U (en) | Measuring device | |
| CN208723914U (en) | A kind of fault category diagnostic system of broadcasting equipment |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| GR01 | Patent grant | ||
| GR01 | Patent grant |