CN114244945B - Noise-reducing and monitoring integrated dispatching special telephone - Google Patents
Noise-reducing and monitoring integrated dispatching special telephone Download PDFInfo
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- CN114244945B CN114244945B CN202111491913.4A CN202111491913A CN114244945B CN 114244945 B CN114244945 B CN 114244945B CN 202111491913 A CN202111491913 A CN 202111491913A CN 114244945 B CN114244945 B CN 114244945B
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/02—Constructional features of telephone sets
- H04M1/19—Arrangements of transmitters, receivers, or complete sets to prevent eavesdropping, to attenuate local noise or to prevent undesired transmission; Mouthpieces or receivers specially adapted therefor
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- H—ELECTRICITY
- H04—ELECTRIC COMMUNICATION TECHNIQUE
- H04M—TELEPHONIC COMMUNICATION
- H04M1/00—Substation equipment, e.g. for use by subscribers
- H04M1/58—Anti-side-tone circuits
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Abstract
The invention provides a noise-reducing and monitoring integrated dispatching special telephone, which comprises a dispatching master machine, matched master machine earphones, a monitoring slave machine and matched slave machine earphones, wherein the dispatching master machine is connected with the dispatching master machine; the dispatching master machine and the field communication equipment bidirectionally transmit audio signals, and the monitoring slave machine and the dispatching master machine bidirectionally transmit audio signals; the monitoring sub-machine and the field communication equipment do not have audio signal transmission; the master earphone is worn by a dispatcher, and transmits the on-site audio signal and the monitoring instruction audio signal received by the dispatcher to the dispatcher; the headset of the sub-machine is worn by a guardian and transmits the live audio signal and the scheduling audio signal to the guardian. Compared with a common telephone, the invention is more suitable for power dispatching service, can improve dispatching communication quality and dispatching operation monitoring quality, reduce risks of situations such as hearing-error repeating, hearing-error command issuing and the like, and strengthen a safety barrier of dispatching operation monitoring.
Description
Technical Field
The invention relates to the technical field of power grid dispatching, in particular to a dispatching special telephone with noise reduction and monitoring integration.
Background
The dispatching telephone voice system is an infrastructure guarantee facility for daily dispatching work in the power grid, and at present, a telephone call-out command mode is still one of the most main modes of dispatching command issuing. The dispatching telephone is used as the main hardware device of the dispatching telephone voice system, and has great influence on the quality and efficiency of the completed dispatching work. In view of the fact that the conventional dispatch telephone still adopts a universal earphone telephone, the applicability is low. The dispatching telephone speech system mainly comprises software and hardware, and is specifically a telephone traffic system (namely a telephone processing system in a computer) and a telephone set respectively.
Through investigation, research and comprehensive analysis, the existing scheduling work by adopting a general telephone receiver still has the problems that the call is interfered by environmental noise, scheduling and monitoring are carried out, and the like, so that potential safety hazards are caused, and the method is mainly embodied as follows:
1) Dispatch call presents a security risk problem.
An undisturbed environment is an important guarantee for the correct handling of the accident by the dispatcher. Especially, in the period of the call of the dispatcher, the quiet call environment can reduce the occurrence probability of situations such as on-site mishearing order, mishearing and repeating of the dispatcher, and the like. However, the problem that the call between the dispatchers is interfered by noise always exists, and the problem is caused by the limitation of the existing telephone to a great extent, such as the multi-period of accidents of typhoons, heavy rain and the like, the dispatching telephones are usually fully loaded to run, three or more telephones are usually carried out simultaneously, the call environment of the on-duty dispatcher is noisier and mutually interfered, the working quality and the efficiency are greatly influenced, and the risks of mistakenly listening instructions by on-site workers and mistakenly listening and repeating by the dispatcher are obviously increased.
In addition, when a dispatcher calls, usually, more than 2 computers are operated simultaneously to check various information in a EMS, GIS, OMS system and the like, and a dispatching instruction is issued in an auxiliary way. However, the handset-type dispatch phone requires the caller to hold the handset with one hand to make a call, which means that the dispatcher only has one free hand to operate more than 2 computers at the moment, so that the situation that the operator on duty clamps the handset with the ears and shoulders and operates the computers at the same time often occurs, and the call mode definitely increases the risk of operation errors.
2) Scheduling monitors existing security risk issues.
According to the 9.4.5.1 clause of the electric safety work procedure of the limited responsibility company of the south China grid: the monitoring operation must be performed by two persons, one for each person and one for each person. The operator is not allowed to have any operation behavior which is not agreed by the guardian in the operation process. The current dispatching operation monitoring mode is mainly monitored by a guardian station beside an on-duty dispatcher, however, the monitoring mode has a problem: the guardian cannot hear what is being said to be in the phone. Under the dispatch monitoring mode, the operation contents of the described field working condition, the repeated description, the verified field device state and the report are not directly known by the guardian. The dispatching work can be effectively performed under the condition that the site is fully known, so the dispatching monitoring is also performed, and the knowledge of a single side in the call is insufficient to enable a guardian to complete high-quality monitoring work and provide reliable guarantee, and the monitoring mode has a large safety risk. This monitoring mode is also a futile measure under the limitations of current general-purpose phones.
Disclosure of Invention
The invention aims to provide a dispatching special telephone with integrated noise reduction and monitoring, which can solve the problems of the prior art that the acoustic type dispatching telephone has large noise and the dispatching call is caused by mutual interference and the existing safety risk is caused by dispatching monitoring because the earphone type dispatching telephone can not enable a guardian to know the actual situation on site.
The invention aims at realizing the following technical scheme:
a noise-reducing and monitoring integrated dispatching special telephone comprises a dispatching master machine, matched master machine earphones, a monitoring slave machine and matched slave machine earphones; the dispatching master machine and the field communication equipment bidirectionally transmit audio signals, the field communication equipment transmits the field audio signals to the dispatching master machine, and the dispatching master machine transmits the dispatching audio signals to the field communication equipment; the monitoring sub-machine and the dispatching master machine bidirectionally transmit audio signals, the dispatching master machine transmits field audio signals and dispatching audio signals to the monitoring sub-machine, and the monitoring sub-machine transmits monitoring instruction audio signals to the dispatching master machine; the monitoring sub-machine and the field communication equipment do not have audio signal transmission; the master earphone is worn by a dispatcher, and transmits the on-site audio signal and the monitoring instruction audio signal received by the dispatching master to the dispatcher; the headset is worn by a guardian and transmits the live audio signal and the scheduling audio signal to the guardian.
Further, the scheduling master comprises a master antenna, a first duplex filter, a first high-frequency receiving circuit, a first frequency modulation intermediate amplifying and demodulating circuit, a first low-frequency amplifying circuit, a call signal control circuit, a differential coupling control circuit, a first modulation signal generating circuit, a first radio frequency signal generating circuit, a first high-frequency amplifying circuit, a control circuit and a pilot frequency detecting circuit;
the first input end of the first duplex filter receives a monitoring instruction audio signal of the monitoring sub-machine through the main machine antenna, the first output end of the first duplex filter is connected with the input end of the first high-frequency receiving circuit, the output end of the first high-frequency receiving circuit is connected with the first input end of the first frequency modulation middle amplifying and demodulating circuit, the first output end of the first frequency modulation middle amplifying and demodulating circuit is connected with the input end of the first low-frequency amplifying circuit, and the second output end of the first frequency modulation middle amplifying and demodulating circuit is connected with the first input end of the call signal control circuit and the first input end of the pilot frequency detecting circuit; the output end of the call signal control circuit is connected with the first low-frequency amplifying circuit; the output end of the first low-frequency amplifying circuit outputs a monitoring instruction audio signal or a live audio signal to the earphone of the mother machine; the first low-frequency amplifying circuit is electrically connected with the differential coupling control circuit;
the differential coupling control circuit receives a field audio signal or transmits a scheduling audio signal to the field through a telephone exchange system; the field audio signal is simultaneously transmitted to a second input end of the first frequency modulation intermediate amplifying and demodulating circuit; the dispatch audio signal is input to the first input ends of the differential coupling control circuit and the first modulation signal generation circuit; the output end of the differential coupling control circuit is connected with the second input end of the first modulation signal generation circuit and the second input end of the pilot frequency detection circuit; the output end of the first modulation signal generation circuit is connected with the input end of the first radio frequency signal generation circuit; the output end of the first radio frequency signal generating circuit is connected with the input end of the first high frequency amplifying circuit, the output end of the first high frequency amplifying circuit is connected with the second input end of the first duplex filter, and the second output end of the first duplex filter sends scheduling audio signals and/or field audio signals to the monitoring child machine through the master machine antenna; the output end of the pilot frequency detection circuit is connected with the control circuit; the control circuit is respectively connected with the call signal control circuit, the first low-frequency amplifying circuit, the differential coupling control circuit, the first radio frequency signal generating circuit and the first high-frequency amplifying circuit.
Further, the dispatching master also comprises a master speaker, and the master speaker plays the audio signal output by the first low-frequency amplifying circuit.
Further, the monitoring sub-machine comprises a sub-machine antenna, a second duplex filter, a second high-frequency receiving circuit, a second frequency modulation middle amplifying and modulating circuit, a second low-frequency amplifying circuit, a sub-machine earphone, a ringing detection control circuit, a pilot frequency oscillator, a calling oscillator, a sub-machine key, a second modulation signal generating circuit, a second radio frequency signal generating circuit, a second high-frequency amplifying circuit, a first single-pole three-throw switch, a second single-pole three-throw switch and a buzzer; the first input end of the second duplex filter receives the dispatching audio signal and the field audio signal from the dispatching master through the slave antenna, and the first output end of the second duplex filter is connected with the first input end of the second high-frequency receiving circuit; the output end of the second high-frequency receiving circuit is connected with the first input end of the second frequency modulation intermediate amplification and modulation circuit, the first output end of the second frequency modulation intermediate amplification and modulation circuit is connected with the first input end of the second low-frequency amplifying circuit, and the second output end of the second frequency modulation intermediate amplification and modulation circuit is connected with the first input end of the ringing detection control circuit; the output end of the second low-frequency amplifying circuit is connected with the headset and sends the scheduling audio signal and/or the on-site audio signal to the headset; the common end of the first single-pole three-throw switch is connected with the battery voltage; the ON end and the TALK end of the first single-pole three-throw switch are connected with the second input end of the second high-frequency receiving circuit and the second input end of the second frequency modulation intermediate amplifying and regulating circuit; the pilot frequency oscillator, the call oscillator and the sub-machine key are respectively and electrically connected with the second modulation signal generation circuit; the first input end of the second modulation signal generating circuit receives a monitoring instruction voice signal, the output end of the second modulation signal generating circuit is connected with the first input end of the second radio frequency signal generating circuit, and the output end of the second radio frequency signal generating circuit is connected with the first input end of the second high frequency amplifying circuit; the input end of the second high-frequency amplifying circuit is connected with the second input end of the second duplex filter, and the second output end of the second duplex filter sends a monitoring instruction voice signal to the dispatching master through the slave antenna; the common end of the second single-pole three-throw switch is connected with the battery voltage, and the TALK end of the second single-pole three-throw switch is respectively connected with the second input end of the second modulation signal generating circuit, the second input end of the second radio frequency signal generating circuit and the second input end of the second high frequency amplifying circuit; the ON end of the second single-pole three-throw switch is connected with the second input end of the ringing detection control circuit; the buzzer is connected with the output end of the ringing detection control circuit, and receives a control signal or a ringing signal output by the ringing detection control circuit.
Further, the monitoring sub-machine further comprises a sub-machine loudspeaker, and the sub-machine loudspeaker plays the audio signal output by the second low-frequency amplifying circuit.
The special dispatching telephone set integrating noise reduction and monitoring adopts the combined design of the headset noise reduction technology and the special signal transmission logic master-slave machine, is more suitable for power dispatching business than a general telephone set, can improve dispatching communication quality and dispatching operation monitoring quality, reduce the possibility of situations such as error hearing repetition, error hearing command and the like, strengthen a safety barrier of dispatching operation monitoring, and can effectively reduce the safety risk of the existing dispatching work.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions of the prior art, the drawings that are needed in the embodiments or the description of the prior art will be briefly described below, it will be obvious that the drawings in the following description are some embodiments of the present invention, and that other drawings can be obtained according to these drawings without inventive effort to a person skilled in the art.
FIG. 1 is a schematic diagram of the signal transmission logic of a dispatch-only telephone of the present invention;
FIG. 2 is a diagram of a dispatch only telephone set according to the present invention;
FIG. 3 is a diagram showing the communication modes between a master and a slave in the prior art and a scheduling master/monitoring slave in the present invention;
FIG. 4 is a schematic block diagram of a scheduling master of the present invention;
fig. 5 is a schematic block diagram of a monitor sub-machine according to the present invention.
Detailed Description
Embodiments of the present disclosure are described in detail below with reference to the accompanying drawings.
Other advantages and effects of the present disclosure will become readily apparent to those skilled in the art from the following disclosure, which describes embodiments of the present disclosure by way of specific examples. It will be apparent that the described embodiments are merely some, but not all embodiments of the present disclosure. The disclosure may be embodied or practiced in other different specific embodiments, and details within the subject specification may be modified or changed from various points of view and applications without departing from the spirit of the disclosure. It should be noted that the following embodiments and features in the embodiments may be combined with each other without conflict. All other embodiments, which can be made by one of ordinary skill in the art without inventive effort, based on the embodiments in this disclosure are intended to be within the scope of this disclosure.
The invention relates to a noise-reducing and monitoring integrated dispatching special telephone, which solves the problems of large noise interference and safety risk in monitoring in the prior art by adopting a mode of combining a dispatching telephone master machine with a noise-reducing headset with a monitoring telephone slave machine.
From a physical definition, vibrations with irregular amplitudes and frequencies are called noise. In combination with the scheduling operation, all sounds interfering with the normal progress of the scheduling operation can be regarded as noise. From the theory, there are three ways to realize the noise reduction function:
1) Noise reduction at the sound source: controlling a noise source, and reducing the noise of the sound source;
2) Noise reduction during noise propagation: blocking noise transmission and reducing noise in the sound transmission path; controlling the transmission of noise, and changing the transmission path of the noise emitted by the sound source;
3) Noise reduction at the human ear: i.e. noise protection of the recipient or organ of the recipient, such as wearing ear protectors like earplugs, earmuffs or helmets, etc.
Theoretically, combining practice, we combine the above three noise reduction modes with scheduling work:
1) Noise reduction at the sound source is mainly achieved by reducing the speaking volume of each dispatcher, which is obviously not practical for the dispatching work, however, reducing the speaking volume of the dispatcher may lead to commands being issued which are not clearly audible, increasing the risk of misoperation, which is not desirable.
2) Noise reduction can be achieved by adding a noise blocking baffle between a dispatcher and the dispatcher in the sound transmission process, so that the noise reduction effect is achieved to a certain extent, the telephone is not required to be modified, and the modulation office environment is required to be modified.
3) Noise reduction at the ear can be achieved by adding a noise reduction headset (as shown in fig. 5), namely, a noise reduction headset jack is newly added on the basis of the original earphone type telephone, and an original audio single-output channel is transformed into a double-output channel. Is the optimal scheme in the three schemes.
The monitoring function of the dispatching special telephone set of the invention can meet the following three requirements:
a) For guardianship personnel, the monitoring system can be used for monitoring both dispatch operators and on-site personnel at the same time;
b) For the on-duty dispatcher, the method can be used for enabling the on-duty dispatcher to hear the reminding and righting of the dispatching guardian while communicating with the on-site personnel;
c) The on-site operator should only hear the individual sounds of the on-duty dispatcher to avoid command confusion.
In order to meet the requirements, a scheduling telephone sub-machine with special signal transmission logic is added on the basis of the original telephone main machine for guardians to use. The specific signaling logic of the master and slave in the dispatch specific phone is shown in fig. 1.
According to the investigation of the prior art and products, a primary-secondary telephone with the functions of noise reduction and headset and monitoring is not available in the market, and communication among all parties when the primary-secondary telephone on the market performs three-party communication is bidirectional, namely, any party can hear the speaking contents of other two parties, and the actual requirements of monitoring work are not met. As shown in fig. 3, (a) is a communication scheme of a conventional master-slave unit, and (b) is a communication scheme of a master-slave unit of the load monitoring function of the present invention. Therefore, the application develops the dispatching special telephone with integrated noise reduction and monitoring, and can realize the noise reduction and monitoring functions.
The invention relates to a noise-reducing and monitoring integrated dispatching special telephone, which comprises a dispatching master machine, matched master machine headphones, a monitoring slave machine and matched slave machine headphones. The dispatching master and the field communication equipment bidirectionally transmit audio signals, the field communication equipment transmits the field audio signals to the dispatching master, and the dispatching master transmits the dispatching audio signals to the field communication equipment; the monitoring sub-machine and the dispatching master machine bidirectionally transmit audio signals, the dispatching master machine transmits field audio signals and dispatching audio signals to the monitoring sub-machine, and the monitoring sub-machine transmits monitoring instruction audio signals to the dispatching master machine. The monitoring sub-machine and the on-site communication equipment have no audio signal transmission. The master earphone is worn by the dispatcher, and transmits the on-site audio signals and the monitoring instruction audio signals received by the dispatcher to the dispatcher. The headset of the sub-machine is worn by a guardian and transmits the live audio signal and the scheduling audio signal to the guardian.
When the field staff is communicated with the dispatching attendant, the audio signal of the field staff is transmitted to the dispatching special telephone set through the telephone traffic system. In the dispatching special telephone, the dispatching master receives the field personnel audio signal from the telephone exchange (which meets one of the requirements in the monitoring function b) of the dispatching special telephone), receives the guardian audio signal from the guardian sub-machine and receives the dispatcher audio signal from the own receiver, outputs the dispatcher and the field audio signal to the guardian sub-machine (which meets the requirements in the monitoring function a) of the dispatching special telephone), and outputs the duty dispatcher audio signal to the telephone traffic system so as to be transmitted to the field staff (which meets the requirements in the monitoring function c) of the dispatching special telephone); the monitoring sub-machine has no direct transmission relation with the on-site personnel audio signals, only has signal transmission with the main machine, and the monitoring sub-machine receives the dispatching personnel audio signals and the on-site personnel audio signals from the dispatching main machine and outputs the monitoring personnel audio signals to the dispatching main machine (the requirement in the monitoring function b) of the dispatching special telephone is met).
Further, as shown in fig. 4, the schematic diagram of the scheduling master includes a master antenna, a first duplex filter, a first high-frequency receiving circuit, a first fm intermediate amplifying and demodulating circuit, a first low-frequency amplifying circuit, a call signal control circuit, a differential coupling control circuit, a first modulation signal generating circuit, a first radio frequency signal generating circuit, a first high-frequency amplifying circuit, a control circuit and a pilot frequency detecting circuit. The first duplex filter has a first input terminal, a second input terminal, a first output terminal, and a second output terminal. The first input end of the first duplex filter receives the monitoring instruction audio signal of the monitoring sub-machine through the parent-machine antenna, the first output end of the first duplex filter is connected with the input end of the first high-frequency receiving circuit, the output end of the first high-frequency receiving circuit is connected with the first input end of the first frequency modulation middle amplifying and demodulating circuit, the first output end of the first frequency modulation middle amplifying and demodulating circuit is connected with the input end of the first low-frequency amplifying circuit, and the second output end of the first frequency modulation middle amplifying and demodulating circuit is connected with the first input end of the call signal control circuit and the first input end of the pilot frequency detecting circuit; the output end of the call signal control circuit is connected with the first low-frequency amplifying circuit. The output end of the first low-frequency amplifying circuit outputs a monitoring instruction audio signal or a live audio signal to the earphone of the mother machine. The first low-frequency amplifying circuit is electrically connected with the differential coupling control circuit.
The differential coupling control circuit receives the live audio signal or transmits the scheduled audio signal to the live through the telephone exchange system. The field audio signal is simultaneously transmitted to a second input end of the first frequency modulation intermediate amplifying and demodulating circuit. The scheduling audio signal input is connected with a first input end of the differential coupling control circuit and the first modulation signal generating circuit. The output end of the differential coupling control circuit is connected with the second input end of the first modulation signal generating circuit and the second input end of the pilot frequency detecting circuit. The output end of the first modulation signal generating circuit is connected with the input end of the first radio frequency signal generating circuit. The output end of the first radio frequency signal generating circuit is connected with the input end of the first high frequency amplifying circuit, the output end of the first high frequency amplifying circuit is connected with the second input end of the first duplex filter, and the second output end of the first duplex filter transmits scheduling audio signals and/or field audio signals to the monitoring child machine through the master machine antenna. The output end of the pilot frequency detection circuit is connected with the control circuit. The control circuit is respectively connected with the call signal control circuit, the first low-frequency amplifying circuit, the differential coupling control circuit, the first radio frequency signal generating circuit and the first high-frequency amplifying circuit.
Further, the dispatching master also comprises a master speaker, and the master speaker plays the audio signal output by the first low-frequency amplifying circuit.
The working principle of the dispatching master is as follows:
1) A first duplex filter: the high-frequency signal receiving circuit is used for receiving the high-frequency signal (including dispatching and field audio signals) of the first high-frequency amplifying circuit and the high-frequency signal (including guardianship instruction audio signals) transmitted from the secondary machine to the primary machine, respectively transmitting the high-frequency signal to the antenna transmitting and first high-frequency receiving circuit, suppressing clutter, and strictly isolating the received and transmitted high-frequency signals, wherein the partial circuit is formed by cascading a plurality of stages of filters.
2) A first high-frequency receiving circuit: the method is used for converting the high-frequency signals transmitted from the slave machine to the master machine into intermediate-frequency signals and completing the tasks of selecting signals, amplifying signals and converting. The partial circuit consists of a high-frequency amplifying circuit, a frequency mixing circuit, a local oscillator circuit and the like. The first high-frequency receiving circuit is used for reducing noise coefficient, improving receiving sensitivity and anti-interference performance, and a resonant amplifying circuit is generally adopted. A local oscillator circuit employs a capacitive three-point crystal oscillator. A mixer circuit performs difference frequency mixing on the signal amplified by the high frequency amplifier and a local oscillator, and converts the signal into a fixed intermediate frequency signal.
3) First frequency modulation intermediate-frequency amplification and demodulation circuit: the method is used for generating low-frequency signals, and the process is that two local oscillation signals are generated first, and then the low-frequency signals are demodulated after amplitude limiting amplification. Typically consisting of a dedicated narrowband fm intermediate amplifier integrated circuit. The more common models are MA6162, LM3361, MC3362 and the like. The output signal of the element comprises: an audio signal (guardian audio signal) generated in the sub-set microphone; pilot signals for controlling the starting of the master machine by the slave machine; calling pilot signal of mother machine of son machine calling; the dial signals generated by the dial control dial circuit of the sub-machine.
4) A first low frequency amplifying circuit: the audio signal and the dialing signal are sent to the interface circuit of the mother machine and the speaker system (the earphone and the noise-reducing earphone) of the mother machine and are controlled by the control circuit of the mother machine and the call control circuit.
5) Pilot frequency detection circuit: the pilot frequency signal is used for identifying and demodulating the pilot frequency signals which are generated by the master machine and the slave machine and used for controlling the master machine in the demodulated low-frequency signals, and generating control signals and outputting the control signals to the control circuit. This part may be an integrated circuit of the audio decoder LM 567.
6) The control circuit: the element is the central control system of the master. The signal is received from the pilot frequency detection circuit and the master keyboard, and the working states of the three circuits are mainly controlled: the power supply circuit of the master radio frequency signal generation and amplification circuit; a relay power supply circuit (operating state under off hook of the mother machine) for controlling off hook state of the mother machine; and controlling the working state of the low-frequency power amplifier circuit of the master-slave interphone.
7) Call signal control circuitry: for controlling dial-up calls of a parent machine. The signals are received from the master control circuit and the master antenna as dial signals transmitted by the slave.
8) The differential coupling control circuit: the element is an interface circuit between the master and the telephone external line, which is used for establishing the wired connection between the master and the telephone exchange system, completing the conversion and transmission of the input and output signals and transmitting the master signal to the modulation circuit. Specifically, the circuit will receive a live crew audio signal from outside the telephone and output a dispatcher audio signal.
9) A first modulation signal generation circuit: for converting the signal into a low frequency modulated signal suitable for transmission and amplifying. The partial circuit consists of a modulation signal generation and amplification circuit. The processed signals include audio signals (guardian audio signals) from telephone external inputs fed to the circuit via the differential coupling circuit; a ringing signal input by telephone external line, i.e. a signal called by the master; audio signals (dispatcher audio signals) generated by the master microphone.
10 First radio frequency signal generation circuit: the device is used for generating high-frequency modulation signals (300 kHz-300 GHz) required by a master transmitter circuit, and can consist of a modulator, a frequency multiplier and the like.
11 First high-frequency amplifying circuit: for amplifying the radio frequency signal generated in the previous step and providing sufficient transmit power to the antenna. The partial circuit may be composed of a driver amplifying circuit and a high-frequency power amplifier. Wherein the driver amplifier may employ a resistor-capacitor coupled amplifier.
12 Power supply circuit: the direct current power supply voltage required by each stage of circuits of the master machine can be generated by matching a step-down transformer with a rectifier.
Further, as shown in fig. 5, the monitoring sub-machine of the present invention includes a sub-machine antenna, a second duplex filter, a second high frequency receiving circuit, a second frequency modulation intermediate amplifying and modulating circuit, a second low frequency amplifying circuit, a sub-machine earphone, a ringing detection control circuit, a pilot frequency oscillator, a call oscillator, a sub-machine key, a second modulation signal generating circuit, a second radio frequency signal generating circuit, a second high frequency amplifying circuit, a first single-pole three-throw switch, a second single-pole three-throw switch and a buzzer. The first input end of the second duplex filter receives the dispatching audio signal and the field audio signal from the dispatching master through the slave antenna, and the first output end of the second duplex filter is connected with the first input end of the second high-frequency receiving circuit. The output end of the second high-frequency receiving circuit is connected with the first input end of the second frequency modulation intermediate amplification and regulation circuit, the first output end of the second frequency modulation intermediate amplification and regulation circuit is connected with the first input end of the second low-frequency amplification circuit, and the second output end of the second frequency modulation intermediate amplification and regulation circuit is connected with the first input end of the ringing detection control circuit; the output end of the second low-frequency amplifying circuit is connected with the headset, and the scheduling audio signal and/or the on-site audio signal is sent to the headset. The common terminal of the first single-pole three-throw switch is connected with the battery voltage. The ON end and the TALK end of the first single-pole three-throw switch are connected with the second input end of the second high-frequency receiving circuit and the second input end of the second frequency modulation intermediate amplifying and modulating circuit. The pilot frequency oscillator, the calling oscillator and the sub-machine key are respectively and electrically connected with the second modulation signal generating circuit. The first input end of the second modulation signal generating circuit receives the monitoring command voice signal, the output end of the second modulation signal generating circuit is connected with the first input end of the second radio frequency signal generating circuit, and the output end of the second radio frequency signal generating circuit is connected with the first input end of the second high frequency amplifying circuit. The input end of the second high-frequency amplifying circuit is connected with the second input end of the second duplex filter, and the second output end of the second duplex filter sends a monitoring instruction voice signal to the dispatching master through the slave antenna. The common end of the second single-pole three-throw switch is connected with the battery voltage, and the TALK end of the second single-pole three-throw switch is respectively connected with the second input end of the second modulation signal generating circuit, the second input end of the second radio frequency signal generating circuit and the second input end of the second high frequency amplifying circuit; the ON terminal is connected with a second input terminal of the ringing detection control circuit. The buzzer is connected with the output end of the ringing detection control circuit and receives a control signal or a ringing signal output by the ringing detection control circuit.
The first single-pole three-throw switch and the second single-pole three-throw switch respectively have 4 ports: a common terminal, a TALK terminal, an ON terminal, and an OFF terminal. The OFF end is typically in a floating state.
Further, the monitoring sub-machine further comprises a sub-machine loudspeaker, and the sub-machine loudspeaker plays the audio signal output by the second low-frequency amplifying circuit.
The working principle of the monitoring sub-machine is as follows:
the working principle and the composition characteristics of a second duplex filter, a second frequency modulation intermediate amplifying and demodulating circuit, a second radio frequency signal generating circuit, a second high frequency amplifying circuit, a second high frequency receiving circuit, a second low frequency amplifying circuit, a second modulation signal generating circuit and the like in the monitoring child machine are basically the same as those of the dispatching parent machine, and the difference is that the working frequencies set by the high frequency transmitting circuit and the high frequency receiving circuit of the parent machine and the child machine are different. In order to shorten the antenna of the sub-machine, the monitoring sub-machine designed by the invention preferably adopts low-frequency receiving and high-frequency transmitting; the master machine is scheduled to receive and transmit by high frequency and low frequency, which can reduce the manufacturing difficulty of the antenna of the slave machine. The differences are:
1) Ringing detection control circuit: the device is used for identifying and demodulating the calling pilot signal from the master antenna and generating a corresponding control signal or ringing signal to the buzzer so as to remind a guardian of answering a call.
2) Pilot oscillator circuit: the method is used for enabling the monitoring sub-machine to generate single audio signals for controlling the off-hook, on-hook, pulse dialing and the like of the main machine. The element can be realized by adopting an RC phase-shifting oscillating circuit or a CMOS gate oscillator.
3) Call oscillator: the calling pilot signal used for generating the calling host of the sub-machine is controlled by the calling key, and the circuit composition and the characteristics are similar to those of a pilot oscillator.
4) The dial signal generating circuit is usually composed of a dial keyboard and a special pulse/double-tone integrated circuit, wherein pulse dial is transmitted by controlling the working mode of a pilot frequency oscillator.
The invention relates to a dispatching special telephone set with the mutual matching of a dispatching master machine and a monitoring slave machine, which mainly has the new functions as follows:
function 1: the master machine communicates with the outside, and the guardian monitors the dispatcher. (core function)
External telephone dialing master machine: at this time, the differential decoupling circuit will receive the telephone external signal, on one hand, the signal processed and output by the differential decoupling circuit of the master will be converted into intermediate frequency signal through the output end of the frequency modulation middle amplifying and demodulating circuit, the signal is dispersed into two paths, one path will be passed through the ringing detection control circuit to dial the slave machine, the other path will be passed through the low frequency amplifying circuit to output audio signal to the noise reduction earphone or earphone loudspeaker of the master machine, the user (dispatcher) of the master machine will be able to hear the voice of the field personnel. On the other hand, the signals processed and output by the differential decoupling circuit of the master machine are input to the modulation signal generating circuit simultaneously with the dispatcher audio signals received by the earphone, and are transmitted to the master machine antenna through the radio frequency signal generating circuit, the high-frequency amplifying circuit and the duplex filter, the audio signals are received by the antennas of the dialed slave machine, and finally output to the noise reduction earphone or the earphone loudspeaker of the slave machine through the circuits of high-frequency receiving, frequency modulation, middle amplifying, demodulation, low-frequency amplifying and the like, and the dispatcher and field personnel can hear the voices of the user (guardian) of the slave machine. The dispatcher audio signal received by the earpiece will also be passed through the differential decoupling circuit to the outside of the phone, and the field personnel will be able to hear and only the dispatcher's voice. Meanwhile, the sub-phone microphone signals are transmitted to the sub-phone antenna through the radio frequency signal generating circuit, the high-frequency amplifying circuit and the duplex filter, then transmitted to the main phone antenna, and transmitted to the noise reduction earphone or the earphone loudspeaker of the main phone through the circuits such as the high-frequency receiving circuit, the frequency modulation middle amplifying circuit, the demodulation circuit, the low-frequency amplifying circuit and the like of the duplex filter, and at the moment, a main phone user (dispatcher) can hear the voice of the guardian.
The master dials the external telephone: at this time, the dialing signal of the master is transmitted through the external telephone line, and after the dialed telephone is connected, the differential decoupling circuit receives the external telephone line signal, and the signal transmission logic among the master, the slave and the telephone exchange (external telephone line) is basically the same as that of the external telephone dialing master, which can be referred to above.
The function is the core function of the set dispatching special telephone, and the dual requirements of noise reduction and monitoring in dispatching communication are met. The high-quality noiseless communication environment can be provided for the duty dispatcher; the demand of guardians for knowing scheduling and on-site double-side information is met; meanwhile, the field personnel are not influenced by the voices of guardians, only can listen to the voices of schedulers, and the problems of crosstalk or confusion caused by the schedulers are avoided.
Function 2: the master machine and the slave machine are used for internal intercom, and the method is suitable for recording and talking work in shift.
The master machine dials the slave machine: when the TALK switch of the slave unit is set at the ON bit, the receiving circuit and the ringing detection control circuit of the slave unit are turned ON to receive the call from the host unit.
When the master machine calls the slave machine, a calling pilot frequency oscillator in the master machine modulation signal generating circuit works, the generated pilot frequency signal is amplified and then generates a high-frequency modulation signal in the radio frequency signal generating circuit, a demodulated master machine calling pilot frequency signal can be output by the amplifying and demodulating circuit in the frequency modulation of the slave machine, and the signal is controlled by the ringing detection control circuit and then generates or amplifies a calling ringing signal to send the calling signal to the slave machine calling buzzer to send a calling sound. After the slave machine hears the calling ringing sound sent by the host machine, the slave machine can carry out internal communication with the master machine after the TALK switch is dialed from the ON position to the TALK position.
The slave machine dials the master machine: when the calling key is pressed by the secondary machine, the secondary machine calling oscillator works and generates a calling pilot signal, the output end of the amplifying and demodulating circuit outputs a secondary machine calling ringing signal in the frequency modulation of the primary machine, the calling ringing signal is amplified by the primary machine calling detection control circuit and sent to the primary machine buzzer to make a calling sound, after the primary machine receives the calling ringing sound, the primary machine control circuit presses the internal intercom switch, the primary machine control circuit is connected with the primary machine low-frequency power amplifier circuit, and simultaneously, the power supply of the relay for controlling the primary machine to pick up the primary machine is cut off, so that the primary machine is in a hanging-up state, the external dialing tone is prevented from interfering the internal intercom, and the internal intercom can be carried out between the primary machine and the secondary machine.
The function supports intercom in the master and slave machines, can be used for scheduling telephone recording work when an operator on duty performs shift switching, improves the condition that two telephones are needed to finish shift switching recording, and reduces the telephone resource occupation condition when shift switching is performed.
It should be noted that the dispatch specific telephone set is designed without eliminating the handset. Considering that the dispatcher may feel uncomfortable due to wearing the headset for a long time or due to the conversation habit and other problems, the dispatcher is still allowed to use the original earphone mode to communicate under the environment without noise, and the monitoring function is still complete at the moment, but the noise reduction function is lost. The headset noise reduction is taken as a new function, does not conflict with the original communication mode, and plays a role in adding flowers to the whole.
The above two functions are only new functions, not all functions, of the designed dispatch-specific telephone set, which are distinguished from general-purpose telephone sets. The description of the general functions is not given for the sake of brevity.
The telephone set specially designed for dispatching in the invention is compared with the existing telephone set which can be used for dispatching communication, and the analysis advantages and disadvantages are shown in the following table 1.
Table 1 telephone function comparison table
As shown in table 1, except for the dispatching special telephone set of the present invention, none of the above telephone sets has the dual functions of noise reduction and monitoring, or only has the noise reduction function, or only has the traditional three-way call function, and cannot be highly adapted to dispatching work.
The invention designs a noise reduction and monitoring integrated dispatching special telephone set, which comprehensively considers various dispatching call demands, has the most complete performance in the noise reduction function and the monitoring function compared with other existing telephone sets, is suitable for the recording of the switching call (the intercom in the master and slave machines), and is the only special telephone set highly suitable for dispatching work.
The invention designs a dispatching special telephone with integrated noise reduction and monitoring by comprehensively analyzing the safety risk of the existing dispatching telephone and aiming at the problems that the dispatching call is interfered by environmental noise, the dispatching monitoring is not comprehensive and the like. The telephone adopts the combined design of the headset noise reduction technology and the special signal transmission logic master-slave machine, can improve the dispatching communication quality and the dispatching operation monitoring quality, reduce the possibility of the occurrence of the situations of mishearing and repeating, mishearing and ordering and the like, strengthen the safety barrier of the dispatching operation monitoring, and can effectively reduce the safety risk of the current dispatching work. At present, feasibility, effectiveness and quality of the designed telephone special for dispatching are verified in theory and technology.
In the present invention, unless expressly stated or limited otherwise, a first feature "on" a second feature may be that the first and second features are in direct contact, or that the first and second features are in indirect contact via an intervening medium. The meaning of "a plurality of" means at least two, e.g., two, three, etc., unless explicitly defined otherwise.
In the present invention, unless explicitly specified and limited otherwise, the terms "mounted," "connected," "secured," and the like are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally formed; may be mechanically connected, may be electrically connected or may be in communication with each other; either directly or indirectly, through intermediaries, or both, may be in communication with each other or in interaction with each other, unless expressly defined otherwise. The specific meaning of the above terms in the present invention can be understood by those of ordinary skill in the art according to the specific circumstances.
The above description is for the purpose of illustrating the embodiments of the present invention and is not to be construed as limiting the invention, but is intended to cover all modifications, equivalents, improvements and alternatives falling within the spirit and principles of the invention.
Claims (5)
1. The special dispatching telephone set with integrated noise reduction and monitoring functions is characterized by comprising a dispatching master machine, matched master machine earphone, a monitoring slave machine and matched slave machine earphone; the dispatching master machine and the field communication equipment bidirectionally transmit audio signals, the field communication equipment transmits the field audio signals to the dispatching master machine, and the dispatching master machine transmits the dispatching audio signals to the field communication equipment; the monitoring sub-machine and the dispatching master machine bidirectionally transmit audio signals, the dispatching master machine transmits field audio signals and dispatching audio signals to the monitoring sub-machine, and the monitoring sub-machine transmits monitoring instruction audio signals to the dispatching master machine; the monitoring sub-machine and the field communication equipment do not have audio signal transmission; the master earphone is worn by a dispatcher, and transmits the on-site audio signal and the monitoring instruction audio signal received by the dispatching master to the dispatcher; the headset is worn by a guardian and transmits the live audio signal and the scheduling audio signal to the guardian.
2. The integrated noise reduction and monitoring dispatch dedicated telephone set according to claim 1, wherein the dispatch master includes a master antenna, a first duplex filter, a first high frequency receiving circuit, a first frequency modulation intermediate amplifying and demodulating circuit, a first low frequency amplifying circuit, a call signal control circuit, a differential coupling control circuit, a first modulation signal generating circuit, a first radio frequency signal generating circuit, a first high frequency amplifying circuit, a control circuit and a pilot frequency detecting circuit;
the first input end of the first duplex filter receives a monitoring instruction audio signal of the monitoring sub-machine through the main machine antenna, the first output end of the first duplex filter is connected with the input end of the first high-frequency receiving circuit, the output end of the first high-frequency receiving circuit is connected with the first input end of the first frequency modulation middle amplifying and demodulating circuit, the first output end of the first frequency modulation middle amplifying and demodulating circuit is connected with the input end of the first low-frequency amplifying circuit, and the second output end of the first frequency modulation middle amplifying and demodulating circuit is connected with the first input end of the call signal control circuit and the first input end of the pilot frequency detecting circuit; the output end of the call signal control circuit is connected with the first low-frequency amplifying circuit; the output end of the first low-frequency amplifying circuit outputs a monitoring instruction audio signal or a live audio signal to the earphone of the mother machine; the first low-frequency amplifying circuit is electrically connected with the differential coupling control circuit;
the differential coupling control circuit receives a field audio signal or transmits a scheduling audio signal to the field through a telephone exchange system; the field audio signal is simultaneously transmitted to a second input end of the first frequency modulation intermediate amplifying and demodulating circuit; the dispatch audio signal is input to the first input ends of the differential coupling control circuit and the first modulation signal generation circuit; the output end of the differential coupling control circuit is connected with the second input end of the first modulation signal generation circuit and the second input end of the pilot frequency detection circuit; the output end of the first modulation signal generation circuit is connected with the input end of the first radio frequency signal generation circuit; the output end of the first radio frequency signal generating circuit is connected with the input end of the first high frequency amplifying circuit, the output end of the first high frequency amplifying circuit is connected with the second input end of the first duplex filter, and the second output end of the first duplex filter sends scheduling audio signals and/or field audio signals to the monitoring child machine through the master machine antenna; the output end of the pilot frequency detection circuit is connected with the control circuit; the control circuit is respectively connected with the call signal control circuit, the first low-frequency amplifying circuit, the differential coupling control circuit, the first radio frequency signal generating circuit and the first high-frequency amplifying circuit.
3. The integrated noise reduction and monitoring dispatch dedicated telephone set of claim 2, wherein the dispatch master further comprises a master speaker, the master speaker playing the audio signal output by the first low frequency amplification circuit.
4. The integrated noise reduction and monitoring dispatching special telephone set according to claim 1, wherein the monitoring sub-set comprises a sub-set antenna, a second duplex filter, a second high-frequency receiving circuit, a second frequency modulation middle amplifying and modulating circuit, a second low-frequency amplifying circuit, a sub-set earphone, a ringing detection control circuit, a pilot oscillator, a call oscillator, a sub-set key, a second modulation signal generating circuit, a second radio-frequency signal generating circuit, a second high-frequency amplifying circuit, a first single-pole three-throw switch, a second single-pole three-throw switch and a buzzer; the first input end of the second duplex filter receives the dispatching audio signal and the field audio signal from the dispatching master through the slave antenna, and the first output end of the second duplex filter is connected with the first input end of the second high-frequency receiving circuit; the output end of the second high-frequency receiving circuit is connected with the first input end of the second frequency modulation intermediate amplification and modulation circuit, the first output end of the second frequency modulation intermediate amplification and modulation circuit is connected with the first input end of the second low-frequency amplifying circuit, and the second output end of the second frequency modulation intermediate amplification and modulation circuit is connected with the first input end of the ringing detection control circuit; the output end of the second low-frequency amplifying circuit is connected with the headset and sends the scheduling audio signal and/or the on-site audio signal to the headset; the common end of the first single-pole three-throw switch is connected with the battery voltage; the ON end and the TALK end of the first single-pole three-throw switch are connected with the second input end of the second high-frequency receiving circuit and the second input end of the second frequency modulation intermediate amplifying and regulating circuit; the pilot frequency oscillator, the call oscillator and the sub-machine key are respectively and electrically connected with the second modulation signal generation circuit; the first input end of the second modulation signal generating circuit receives a monitoring instruction voice signal, the output end of the second modulation signal generating circuit is connected with the first input end of the second radio frequency signal generating circuit, and the output end of the second radio frequency signal generating circuit is connected with the first input end of the second high frequency amplifying circuit; the input end of the second high-frequency amplifying circuit is connected with the second input end of the second duplex filter, and the second output end of the second duplex filter sends a monitoring instruction voice signal to the dispatching master through the slave antenna; the common end of the second single-pole three-throw switch is connected with the battery voltage, and the TALK end of the second single-pole three-throw switch is respectively connected with the second input end of the second modulation signal generating circuit, the second input end of the second radio frequency signal generating circuit and the second input end of the second high frequency amplifying circuit; the ON end of the second single-pole three-throw switch is connected with the second input end of the ringing detection control circuit; the buzzer is connected with the output end of the ringing detection control circuit, and receives a control signal or a ringing signal output by the ringing detection control circuit.
5. The integrated noise reduction and monitoring dispatch special telephone set of claim 4, wherein the monitoring sub-set further comprises a sub-set speaker, wherein the sub-set speaker plays the audio signal output by the second low frequency amplifying circuit.
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