CN101764664A - PCM signal monitoring device with error detection alarming function and error detection alarming method thereof - Google Patents

Abstract

A PCM signal monitoring device with error detection and alarm function and a method for error detection and alarm. It relates to a PCM signal monitoring device and a method for error detection and alarm thereof. It is proposed to solve the defect that the existing device cannot decode the PCM signal, and at the same time detect and alarm the errors that the clock signal lags the gate control signal, the data signal lags the clock signal, and the clock signal duty cycle imbalance occurs. The signal isolation and level conversion module converts the external telemetry or remote detection signal and sends it to the telemetry or remote detection signal input terminal of the signal decoding and error detection alarm module through the telemetry or remote detection signal output terminal, and the signal decoding and error detection alarm module passes Signal decoding and error detection and alarm module internal solidified clock signal lag gate signal, data signal lag clock signal and clock signal duty ratio error logic state machine to detect and alarm. It can be widely used in various occasions where data monitoring and error detection of PCM signals are required.

Description

PCM signal monitoring device with error detection and alarm function and method for error detection and alarm

technical field

The invention relates to a PCM signal monitoring device and a method for error detection and alarm thereof.

Background technique

The telemetry and remote control commands between the satellite center computer and the ground measurement and control terminal use PCM (pulse code modulation) signals, as shown in Figure 1; and a complete set of PCM signals is composed of three signals: gate control, clock and data . At present, there are many PCM signal processing devices in the market, some devices can realize the encoding or decoding of PCM data, and some devices can perform PCM frame synchronization detection; but there is no device that can realize both decoding of PCM signals, At the same time, it can detect and alarm the possible errors of clock signal lagging gate control signal, data signal lagging clock signal, and clock signal duty ratio imbalance that may occur during the transmission process.

Contents of the invention

In order to solve the problem that the existing device cannot complete the decoding of the PCM signal at the same time, the present invention also detects and alarms the error that the clock signal lags the gating signal, the data signal lags the clock signal, and the duty ratio imbalance of the clock signal that may occur during the transmission process defects, and propose a PCM signal monitoring device with error detection and alarm function and a method for error detection and alarm.

PCM signal monitoring device with error detection and alarm function, which includes signal decoding and error detection and alarm module, telemetry signal isolation and level conversion module, remote control signal isolation and level conversion module, LVDS signal sending component and LVDS signal receiving component; The telemetry signal isolation and level conversion module and the remote control signal isolation and level conversion module have the same structure and function; the telemetry signal input terminal of the telemetry signal isolation and level conversion module is used to receive external telemetry signals, and the telemetry signal isolation The telemetry signal output terminal of the level conversion module is connected with the telemetry signal input terminal of the signal decoding and error detection alarm module; the remote control signal isolation and the remote control signal input terminal of the level conversion module are used to receive external remote control signals; the remote control signal isolation The remote control signal output terminal of the level conversion module is connected with the remote control signal input terminal of the signal decoding and error detection alarm module; the data signal output terminal of the signal decoding and error detection alarm module is connected with the data signal input terminal of the LVDS signal sending component, and the signal The data signal input terminal of the decoding and error detection and alarm module is connected to the data signal output terminal of the LVDS signal receiving component; the data signal output terminal of the LVDS signal sending component is used to send data signals to external control equipment, and the data signal input terminal of the LVDS signal receiving component The terminal is used to receive the data signal sent by the external control equipment.

Based on the error detection and alarm method of the PCM signal monitoring device with error detection and alarm function, the first telemetry signal decoding module in the signal decoding and error detection and alarm module is used to decode the received telemetry signal and decode the decoded telemetry signal The signal is sent to the first LVDS signal framing module for framing processing; the second remote control signal decoding module in the signal decoding and error detection alarm module is used to decode the received remote control signal, and send the decoded remote control signal to The second LVDS signal framing module performs framing processing; the first clock signal lag gating signal error detection logic state machine and the second clock signal lag gating signal error detection logic are also solidified in the signal decoding and error detection alarm module State Machine, First Data Signal Lag Clock Signal Error Detection Logic State Machine, Second Data Signal Lag Clock Signal Error Detection Logic State Machine, First Clock Signal Duty Cycle Error Detection Logic State Machine, and Second Clock Signal Duty Cycle Error Detection logic state machine; the first clock signal lag gate signal error detection logic state machine performs error detection of the clock signal lag gate signal on the received telemetry detection signal, and generates an alarm or error message according to the detection result, and also Send the alarm or error information to the first LVDS signal framing module for framing processing; the second clock signal lag gating signal error detection logic state machine performs clock signal lag gating on the received remote control detection signal Error detection of the signal, and generate an alarm or error message according to the detection result, and send the alarm or error message to the second LVDS signal framing module for framing processing; the first data signal lags the clock signal error detection logic state The machine performs the error detection of the data signal lagging the clock signal on the received telemetry detection signal, and generates an alarm or error message according to the detection result, and sends the alarm or error message to the first LVDS signal framing module for framing processing ; The second data signal lagging clock signal error detection logic state machine performs error detection of the data signal lagging clock signal on the received remote control detection signal, and generates an alarm or error message according to the detection result, and also reports the alarm or error The information is sent to the second LVDS signal framing module for framing processing; the first clock signal duty cycle error detection logic state machine performs the error detection of the clock signal duty cycle on the received telemetry detection signal, and generates an error message according to , also sending the error reporting information to the first LVDS signal framing module for framing processing; the second clock signal duty cycle error detection logic state machine performs error detection of the clock signal duty cycle on the received remote control detection signal , and generate error information according to the detection results, and send the error information to the second LVDS signal framing module for framing processing, and the first LVDS signal framing module and the second LVDS signal framing module will receive the received The alarm or error signal is sent to the LVDS signal sending module after framing processing, and the LVDS signal sending module sends the received alarm or error signal to the LVDS signal Send components.

The present invention can detect and alarm the clock signal lagging gating signal, data signal lagging clock signal, and clock signal duty ratio imbalance that may occur in the transmission process while completing the decoding of the PCM signal; by setting different Threshold value, to realize two alarm modes of alarm and error reporting; LVDS signal sending component 4 adopts LVDS high-speed transmission interface, which can upload the monitored data and error information quickly, and LVDS (differential signal with low voltage swing) can make the signal in the Differential PCB lines or pairs of balanced cables transmit at a rate of several hundred Mbps, featuring high speed, high noise immunity, low voltage swing, and low power consumption.

Description of drawings

Fig. 1 is a schematic diagram of the communication system between the existing satellite and the ground control center; Fig. 2 is a schematic diagram of the module structure of the specific embodiment 1; Fig. 3 is a schematic diagram of the module structure of the signal decoding and error detection and alarm module 1; Fig. 4 is a signal isolation and level The schematic circuit diagram of the conversion module 2; Fig. 5 is the schematic circuit diagram of the LVDS signal sending component 4; Fig. 6 is the schematic circuit diagram of the LVDS signal receiving component 5; Fig. 7 is the work of the logic state machine for clock signal lag gating signal error detection Schematic diagram of the principle; FIG. 8 is a schematic diagram of the working principle of the logic state machine for data signal lagging clock signal error detection; FIG. 9 is a schematic diagram of the working principle of the logic state machine for clock signal duty cycle error detection.

Detailed ways

Specific implementation mode 1: This implementation mode is described in conjunction with FIG. 2. This implementation mode includes a signal decoding and error detection and alarm module 1, a telemetry signal isolation and level conversion module 2, a remote control signal isolation and level conversion module 3, and an LVDS signal transmission component. 4 and LVDS signal receiving assembly 5; The structures and functions of the telemetry signal isolation and level conversion module 2 and the remote control signal isolation and level conversion module 3 are the same; the telemetry signal isolation and level conversion module 2 telemetry signal input terminals For receiving external telemetry signals, the telemetry signal output end of the telemetry signal isolation and level conversion module 2 is connected to the telemetry signal input end of the signal decoding and error detection alarm module 1; the remote control signal isolation and level conversion module 3 The signal input terminal is used to receive external remote control signals; the remote control signal output terminal of the remote control signal isolation and level conversion module 3 is connected to the remote control signal input terminal of the signal decoding and error detection alarm module 1; the signal decoding and error detection alarm module 1 The data signal output end of the LVDS signal sending assembly 4 is connected to the data signal input end of the LVDS signal sending assembly 4, and the data signal input end of the signal decoding and error detection alarm module 1 is connected to the data signal output end of the LVDS signal receiving assembly 5; The data signal output end is used to send data signals to the external control device, and the data signal input end of the LVDS signal receiving component 5 is used to receive the data signal sent by the external control device.

Specific embodiment two: this embodiment is described in conjunction with Fig. 3, the difference between this embodiment and specific embodiment one is that the signal decoding and error detection alarm module 1 is composed of the first telemetry signal decoding module 1-1, the first clock signal lag Gating signal error detection and alarm module 1-2, first data signal lagging clock signal error detection and alarm module 1-3, first clock signal duty cycle error detection and error reporting module 1-4, first LVDS signal framing module 1- 5. System clock and data receiving module 1-6, second remote control signal decoding module 1-7, second clock signal lag gating signal error detection and alarm module 1-8, second data signal lag clock signal error detection and alarm module 1 -9, the second clock signal duty cycle error detection error reporting module 1-10, the second LVDS signal framing module 1-11 and LVDS signal transmission module 1-12; telemetry signal isolation and level conversion module 2 telemetry signal The output terminal is simultaneously connected with the telemetry signal input terminal of the first telemetry signal decoding module 1-1, the telemetry signal input terminal of the first clock signal lag gating signal error detection alarm module 1-2, and the first data signal lag clock signal error detection alarm The telemetry signal input terminal of the module 1-3 is connected with the telemetry signal input terminal of the first clock signal duty cycle error detection error reporting module 1-4; the telemetry decoding signal output terminal of the first telemetry signal decoding module 1-1, the first clock signal The telemetry detection alarm signal output terminal of the signal lag gating signal error detection alarm module 1-2, the first data signal lag clock signal error detection alarm signal output terminal of the telemetry detection alarm module 1-3, and the first clock signal duty ratio error The telemetry detection error signal output terminal of the detection error reporting module 1-4 is respectively connected with the first telemetry decoding signal input terminal, the second telemetry detection alarm signal input terminal, and the third telemetry detection alarm signal input terminal of the first LVDS signal framing module 1-5 end is connected with the fourth telemetry detection error signal input end; the LVDS signal output end of the first LVDS signal framing module 1-5 is connected with the first LVDS signal input end of the LVDS signal transmission module 1-12; remote control signal isolation and level The remote control signal output terminal of the conversion module 3 is connected with the remote control signal input terminal of the second remote control signal decoding module 1-7, the remote control signal input terminal of the second clock signal lag gating signal error detection alarm module 1-8, and the second data signal simultaneously. The remote control signal input terminal of the delayed clock signal error detection and alarm module 1-9 is connected to the remote control signal input terminal of the second clock signal duty cycle error detection error reporting module 1-10; the remote control decoding signal of the second remote control signal decoding module 1-7 Output end, the second clock signal lags the remote control detection alarm signal output end of the gating signal error detection alarm module 1-8, the second data signal lags the remote control detection alarm signal output end of the clock signal error detection alarm module 1-9, the second The remote control detection error signal output terminal of the clock signal duty cycle error detection error reporting module 1-10 is connected with the first remote control decoding signal input terminal and the second remote control detection alarm signal of the second LVDS signal framing module 1-11 respectively. Number input end, the third remote control detection alarm signal input end and the fourth remote control detection error reporting signal input end are connected; the LVDS signal output end of the second LVDS signal framing module 1-11 is connected with the second LVDS signal output end of the LVDS signal sending module 1-12 The signal input terminal is connected, the data signal output terminal of LVDS signal transmission module 1-12 is connected with the data signal input terminal of LVDS signal transmission component 4, and the data signal output terminal of LVDS signal transmission module 1-12 is signal decoding and error detection alarm The data signal output end of module 1; the data signal input end of system clock and data receiving module 1-6 is connected with the data signal output end of LVDS signal receiving assembly 5, and the data signal input end of system clock and data receiving module 1-6 is It is the data signal input end of the signal decoding and error detection alarm module 1. Other compositions and connection methods are the same as those in Embodiment 1.

The working process of this embodiment:

First, the telemetry signal isolation and level conversion module 2 or the remote control signal isolation and level conversion module 3 performs level conversion on the externally sent telemetry signal or remote control signal, and converts the PCM signal of the RS-422 level into a TTL level, Simultaneously the converted signal is sent to the signal decoding and error detection alarm module 1, the first telemetry signal decoding module 1-1 and the second remote control signal decoding module 1-7 in the signal decoding and error detection alarm module 1 are used to receive The received telemetry signal or remote control signal is decoded, and the decoded telemetry signal or remote control signal is sent to the first LVDS signal framing module 1-5 or the second LVDS signal framing module 1-11 for framing processing and then sent to The LVDS signal sending module 1-12; the LVDS signal sending module 1-12 sends the received data signal to the LVDS signal sending component 4;

The first and second clock signal lag gating signal error detection and alarm modules, the first and second data signal lag clock signal error detection and alarm modules, and the first and second clock signal duty ratio error detection and alarm modules receive telemetry or remote control signals Perform detection and counting, and compare the detection and counting results with the preset threshold to determine the type and time of error occurrence. According to the different setting thresholds, it can issue two types of alarms: alarm and error; for specific alarm thresholds, refer to The following table:

detection function set the threshold Test results Error in clock signal lagging gating signal 7μs≤t ₁ <10μs Call the police t ₁ ≥ 10μs report error The error that the data signal lags behind the clock signal 20μs≤t ₂ <30μs Call the police t ₂ ≥ 30μs report error Wrong clock signal duty cycle τ≤45% Over the lower limit error τ≥55% Over limit error

The LVDS signal sending component 4 uploads the error detection result to the external control device; the LVDS signal receiving component 5 can inject the system time of the external control device into the device.

Specific embodiment three: This embodiment is described in conjunction with Fig. 4. The difference between this embodiment and specific embodiment one is that the telemetry signal isolation and level conversion module 2 and the remote control signal isolation and level conversion module 3 all adopt the model of NVE company. Integrated circuit of IL422. Other compositions and connection methods are the same as those in Embodiment 1.

Embodiment 4: This embodiment is described with reference to FIG. 5 . The difference between this embodiment and Embodiment 1 is that the LVDS signal sending component 4 adopts an integrated circuit of the type DS90LV011 of NS Company. Other compositions and connection methods are the same as those in Embodiment 1.

Embodiment 5: This embodiment is described with reference to FIG. 6 . The difference between this embodiment and Embodiment 1 is that the LVDS signal receiving component 5 adopts an integrated circuit of the type DS90LV012 of NS Company. Other compositions and connection methods are the same as those in Embodiment 1.

Specific embodiment six: the method for error detection and alarm based on the PCM signal monitoring device with error detection and alarm function described in this embodiment;

The first telemetry signal decoding module 1-1 in the signal decoding and error detection alarm module 1 is used to decode the received telemetry signal, and send the decoded telemetry signal to the first LVDS signal framing module 1-5 for further processing. Framing processing; signal decoding and error detection alarm module 1 The second remote control signal decoding module 1-7 is used to decode the received remote control signal, and send the decoded remote control signal to the second LVDS signal framing module 1-11 to perform framing processing; the signal decoding and error detection alarm module 1 is also solidified with a first clock signal lag gating signal error detection logic state machine, a second clock signal lag gating signal error detection logic state machine, First data signal lag clock signal error detection logic state machine, second data signal lag clock signal error detection logic state machine, first clock signal duty cycle error detection logic state machine, and second clock signal duty cycle error detection logic state machine machine; the first clock signal lag gating signal error detection logic state machine performs error detection of the clock signal lag gating signal on the received telemetry detection signal, and generates an alarm or error message according to the detection result, and also the described Alarm or error information is sent to the first LVDS signal framing module 1-5 for framing processing; the second clock signal lag gating signal error detection logic state machine performs clock signal lag gating on the received remote control detection signal Error detection of the signal, and generate an alarm or error message according to the detection result, and send the alarm or error message to the second LVDS signal framing module 1-11 for framing processing; the first data signal lags the clock signal error The detection logic state machine performs the error detection of the data signal lagging the clock signal on the received telemetry detection signal, and generates an alarm or error message according to the detection result, and sends the alarm or error message to the first LVDS signal framing module 1 -5 Carry out framing processing; the second data signal lag clock signal error detection logic state machine performs error detection of data signal lag clock signal on the received remote control detection signal, and generates an alarm or error message according to the detection result, and also Send the alarm or error message to the second LVDS signal framing module 1-11 for framing processing; the first clock signal duty ratio error detection logic state machine performs clock signal duty ratio on the received telemetry detection signal error detection, and generate error reporting information according to the detection results, and also send the error reporting information to the first LVDS signal framing module 1-5 for framing processing; the second clock signal duty cycle error detection logic state machine will receive The received remote control detection signal carries out error detection of the clock signal duty ratio, and generates error reporting information according to the detection result, and also sends the error reporting information to the second LVDS signal framing module 1-11 for framing processing, and the first The LVDS signal framing module 1-5 and the second LVDS signal framing module 1-11 send the received alarm or error signal framing to the LVDS signal sending module 1-12, and the LVDS signal sending module 1-12 12 Send the received alarm or error signal to the LVDS signal sending component 4 .

Embodiment 7: This embodiment is described in conjunction with FIG. 7 . The difference between this embodiment and Embodiment 6 is that the first clock signal lag gating signal error detection logic state machine and the second clock signal lag gating signal error detection logic state The working process of the machine is the same, and they all include four states: system idle state, start counting state, stop counting state and system state judgment state; in the system idle state, waiting for detection of telemetry signal isolation and level conversion module 2 or remote control signal isolation With the telemetry detection signal or the remote control detection signal sent by the level conversion module 3; if the rising edge of the gating signal in the telemetry detection signal or the remote control detection signal is received, the state machine is converted to the start counting state; in the start counting state , the system counter adds 1 to the counting result of each clock cycle; if the rising edge of the clock signal in the telemetry detection signal or the remote control detection signal is detected, the state machine is converted to the stop counting state; in the stop counting state, the The detection and counting results of the system counter are latched, and then switched to the system state judgment state; in the system state judgment state, the counting result is compared with the set threshold, the type and time of error occurrence are judged, and an alarm is generated according to different preset thresholds or report error information, and send the alarm or error report information; if the falling edge of the gating signal in the telemetry detection signal or the remote control detection signal is received, the state machine switches to the system idle state. Other compositions and connection methods are the same as those in Embodiment 6.

Embodiment 8: This embodiment is described in conjunction with FIG. 8 . The difference between this embodiment and Embodiment 6 lies in the logic state machine for error detection of the first data signal lagging clock signal and the logic state machine for error detection of the second data signal lagging clock signal. The working process is the same, and they all include five states: system idle state, system ready state, start counting state, stop counting state and system state judgment state; The telemetry detection signal or the remote control detection signal sent by the signal isolation and level conversion module 3; if the rising edge of the gating signal in the telemetry detection signal or the remote control detection signal is received, the state machine is converted to the system ready state; in the system Ready state, waiting for the telemetry detection signal or the remote control detection signal sent by the detection signal isolation and level conversion module 2, if the falling edge of the gating signal in the telemetry detection signal or the remote control detection signal is received, the state machine switches to the system idle state; if the rising edge of the clock signal in the telemetry detection signal or the remote control detection signal is received, the state machine is switched to the start counting state; in the counting start state, the system counter adds 1 to the counting result of each clock cycle; if Receive the falling edge of the clock signal in the telemetry detection signal or the remote control detection signal and the data signal does not jump, then the state machine is converted to the system ready state; if the data signal in the telemetry detection signal or the remote control detection signal is received jump, then the state machine is converted to the stop counting state; in the stop counting state, the detection and counting result of the system counter is latched, and then converted to the system state judgment state; in the system state judgment state, the counting result is compared with the set threshold In comparison, the error occurrence type and occurrence time are judged, an alarm or error message is generated according to different preset thresholds, and the alarm or error message is sent; the state machine switches to the system ready state. Other compositions and connection methods are the same as those in Embodiment 6.

Embodiment 9: This embodiment is described in conjunction with FIG. 9 . The difference between this embodiment and Embodiment 6 is that the first clock signal duty cycle error detection logic state machine and the second clock signal duty cycle error detection logic state machine The working process is the same, and they all include five states: system idle state, system ready state, start counting state, stop counting state and system state judgment state; The telemetry detection signal or the remote control detection signal sent by the signal isolation and level conversion module 3; if the rising edge of the gating signal in the telemetry detection signal or the remote control detection signal is received, the state machine is converted to the system ready state; in the system Ready state, waiting for the telemetry detection signal or the remote control detection signal sent by the detection signal isolation and level conversion module 2, if the falling edge of the gating signal in the telemetry detection signal or the remote control detection signal is received, the state machine switches to the system idle state; if the rising edge of the clock signal in the telemetry detection signal or the remote control detection signal is received, the state machine is switched to the start counting state; in the counting start state, the system counter adds 1 to the counting result of each clock cycle; if Receive the falling edge of the clock signal in the telemetry detection signal or the remote control detection signal, then the state machine is converted to the stop counting state; in the stop counting state, the detection and counting result of the system counter is latched, and then converted to the system state judgment state ; In the system state judgment state, the counting result is compared with the set threshold value, the type of error occurrence and the time of occurrence are judged, and the error message is generated according to the preset different thresholds, and the error message is sent; the state machine switches to the system ready state. Other compositions and connection methods are the same as those in Embodiment 6.

Claims (9)

1. the PCM signal monitoring device that has error detection alarming function is characterized in that it comprises signal decoding and error detection alarming module (1), telemetered signal is isolated and level switch module (2), remote signal are isolated and level switch module (3), LVDS signal sending assembly (4) and LVDS signal receiving assembly (5); Described telemetered signal is isolated all identical with the 26S Proteasome Structure and Function of level switch module (3) with the remote signal isolation with level switch module (2); Telemetered signal is isolated and the telemetered signal input of level switch module (2) is used to receive outside telemetered signal, and described telemetered signal is isolated and linked to each other with the telemetered signal input of signal decoding and error detection alarming module (1) with the telemetered signal output of level switch module (2); Remote signal is isolated and the remote signal input of level switch module (3) is used to receive the external remote control signal; Described remote signal is isolated and is linked to each other with the remote signal input of signal decoding and error detection alarming module (1) with the remote signal output of level switch module (3); The data-signal output of signal decoding and error detection alarming module (1) links to each other with the data-signal input of LVDS signal sending assembly (4), and the data-signal input of signal decoding and error detection alarming module (1) links to each other with the data-signal output of LVDS signal receiving assembly (5); The data-signal output of LVDS signal sending assembly (4) is used for sending data-signal to external control devices, and the data-signal input of LVDS signal receiving assembly (5) is used to receive the data-signal that external control devices sends.

2. the PCM signal monitoring device with error detection alarming function according to claim 1 is characterized in that described signal decoding and error detection alarming module (1) are by the first telemetered signal decoder module (1-1), the first clock signal hysteresis gate signal error detection alarm module (1-2), the first data-signal hysteresis clock signal error detection alarming module (1-3), the first clock signal duty cycle error detection module (1-4) that reports an error, the one LVDS sets of signals frame module (1-5), system clock and data reception module (1-6), the second remote signal decoder module (1-7), second clock signal lag gate-control signal error detection alarming module (1-8), the second data-signal hysteresis clock signal error detection alarming module (1-9), the second clock signal dutyfactor error detection module (1-10) that reports an error, the 2nd LVDS sets of signals frame module (1-11) and LVDS signal transmitting module (1-12) are formed; Telemetered signal is isolated with the report an error telemetered signal input of module (1-4) of the telemetered signal input and the first clock signal duty cycle error detection of the telemetered signal input of the telemetered signal input of telemetered signal output while of level switch module (2) and the first telemetered signal decoder module (1-1), the first clock signal hysteresis gate signal error detection alarm module (1-2), the first data-signal hysteresis clock signal error detection alarming module (1-3) and is linked to each other; The remote measurement decoded signal output of the first telemetered signal decoder module (1-1), the remote measurement detection alarm signal output part of the first clock signal hysteresis gate signal error detection alarm module (1-2), the remote measurement detection alarm signal output part of the first data-signal hysteresis clock signal error detection alarming module (1-3), the first clock signal duty cycle error detection report an error the remote measurement of module (1-4) detect report an error signal output part respectively with the first remote measurement decoded signal input of a LVDS sets of signals frame module (1-5), the second remote measurement detection alarm signal input part, the 3rd remote measurement detection alarm signal input part detects the signal input part that reports an error with the 4th remote measurement and links to each other; The LVDS signal output part of the one LVDS sets of signals frame module (1-5) links to each other with a LVDS signal input part of LVDS signal transmitting module (1-12); Remote signal is isolated with the report an error remote signal input of module (1-10) of the remote signal input and the second clock signal dutyfactor error detection of the remote signal input of the remote signal input of remote signal output while of level switch module (3) and the second remote signal decoder module (1-7), second clock signal lag gate-control signal error detection alarming module (1-8), the second data-signal hysteresis clock signal error detection alarming module (1-9) and is linked to each other; The remote control decoding signal output part of the second remote signal decoder module (1-7), the remote control detection alarm signal output part of second clock signal lag gate-control signal error detection alarming module (1-8), the remote control detection alarm signal output part of the second data-signal hysteresis clock signal error detection alarming module (1-9), second clock signal dutyfactor error detection report an error the remote control of module (1-10) detect report an error signal output part respectively with the first remote control decoding signal input part of the 2nd LVDS sets of signals frame module (1-11), the second remote control detection alarm signal input part, the 3rd remote control detection alarm signal input part detects the signal input part that reports an error with the 4th remote control and links to each other; The LVDS signal output part of the 2nd LVDS sets of signals frame module (1-11) links to each other with the 2nd LVDS signal input part of LVDS signal transmitting module (1-12), the data-signal output of LVDS signal transmitting module (1-12) links to each other with the data-signal input of LVDS signal sending assembly (4), and the data-signal output of LVDS signal transmitting module (1-12) is the data-signal output of signal decoding and error detection alarming module (1); The data-signal input of system clock and data reception module (1-6) links to each other with the data-signal output of LVDS signal receiving assembly (5), and the data-signal input of system clock and data reception module (1-6) is the data-signal input of signal decoding and error detection alarming module (1).

3. the PCM signal monitoring device with error detection alarming function according to claim 1 is characterized in that it is the integrated circuit of IL422 that the telemetered signal isolation is all adopted the model of NVE company with level switch module (2) and remote signal isolation with level switch module (3).

4. the PCM signal monitoring device with error detection alarming function according to claim 1 is characterized in that it is the integrated circuit of DS90LV011 that LVDS signal sending assembly (4) adopts the model of NS company.

5. the PCM signal monitoring device with error detection alarming function according to claim 1 is characterized in that it is the integrated circuit of DS90LV012 that LVDS signal receiving assembly (5) adopts the model of NS company.

6. based on the method for the error detection alarming of claim 1 or 2 described PCM signal monitoring devices with error detection alarming function, the first telemetered signal decoder module (1-1) in signal decoding and the error detection alarming module (1) is used for the telemetered signal that receives is decoded, and decoded telemetered signal is sent to a LVDS sets of signals frame module (1-5) carries out framing and handle; The second remote signal decoder module (1-7) in signal decoding and the error detection alarming module (1) is used for the remote signal that receives is decoded, and decoded remote signal is sent to the 2nd LVDS sets of signals frame module (1-11) carries out framing and handle; It is characterized in that also being solidified with in described signal decoding and the error detection alarming module (1) the first clock signal hysteresis gate signal error and detect logic state machine, second clock signal lag gate-control signal error detection logic state machine, the first data-signal hysteresis clock signal error detection logic state machine, the second data-signal hysteresis clock signal error detection logic state machine, the first clock signal duty cycle error detection logic state machine and second clock signal dutyfactor error detection logic state machine; The described first clock signal hysteresis gate signal error detects logic state machine, the remote measurement detection signal that receives is carried out the error detection of clock signal hysteresis gate-control signal, and generate to report to the police or the information that reports an error according to testing result, also described warning or the information of reporting an error are sent to a LVDS sets of signals frame module (1-5) and carry out framing and handle; Described second clock signal lag gate-control signal error detection logic state machine, the remote control detection signal that receives is carried out the error detection of clock signal hysteresis gate-control signal, and generate to report to the police or the information that reports an error according to testing result, also described warning or the information of reporting an error are sent to the 2nd LVDS sets of signals frame module (1-11) and carry out framing and handle; The described first data-signal hysteresis clock signal error detection logic state machine, the remote measurement detection signal that receives is carried out the error detection of data-signal hysteresis clock signal, and generate to report to the police or the information that reports an error according to testing result, also described warning or the information of reporting an error are sent to a LVDS sets of signals frame module (1-5) and carry out framing and handle; The described second data-signal hysteresis clock signal error detection logic state machine, the remote control detection signal that receives is carried out the error detection of data-signal hysteresis clock signal, and generate to report to the police or the information that reports an error according to testing result, also described warning or the information of reporting an error are sent to the 2nd LVDS sets of signals frame module (1-11) and carry out framing and handle; The first clock signal duty cycle error detection logic state machine, the remote measurement detection signal that receives is carried out the error detection of clock signal duty cycle, and generate the information that reports an error according to testing result, also the described information of reporting an error is sent to a LVDS sets of signals frame module (1-5) and carry out the framing processing; Second clock signal dutyfactor error detection logic state machine, the remote control detection signal that receives is carried out the error detection of clock signal duty cycle, and generate the information that reports an error according to testing result, also the described information of reporting an error is sent to the 2nd LVDS sets of signals frame module (1-11) and carry out the framing processing, the warning that a described LVDS sets of signals frame module (1-5) and the 2nd LVDS sets of signals frame module (1-11) will receive or the signal framing that reports an error send to LVDS signal transmitting module (1-12) after handling, and the warning that LVDS signal transmitting module (1-12) will receive or the signal that reports an error send to LVDS signal sending assembly (4).

7. the method for the error detection alarming of the PCM signal monitoring device with error detection alarming function according to claim 6, it is identical with the course of work of second clock signal lag gate-control signal error detection logic state machine to it is characterized in that the first clock signal hysteresis gate signal error detects logic state machine, and they include one of four states: system's idle condition, begin count status, stop count status and system mode is judged state; In system's idle condition, wait for detection signal is isolated and level switch module sends remote measurement detection signal or remote control detection signal; If receive the rising edge of the gate-control signal in remote measurement detection signal or the remote control detection signal, then described state machine is transformed into the beginning count status; At the beginning count status, system counter adds 1 on the count results of each clock cycle; If detect the rising edge of clock signal in remote measurement detection signal or the remote control detection signal, then described state machine is transformed into and stops count status; Stopping count status, the detection count results of system counter is being latched, be transformed into system mode then and judge state; Judge state in system mode, count results compared with setting threshold that misjudgment occurrence type and time of origin generate the warning or the information that reports an error according to pre-set threshold, and send the described warning or the information that reports an error; If receive the trailing edge of the gate-control signal in remote measurement detection signal or the remote control detection signal, then described state machine is transformed into system's idle condition.

8. the method for the error detection alarming of the PCM signal monitoring device with error detection alarming function according to claim 6, it is characterized in that the first data-signal hysteresis clock signal error detection logic state machine is identical with the course of work of the second data-signal hysteresis clock signal error detection logic state machine, they include five states: system's idle condition, system's ready state, begin count status, stop count status and system mode and judge state; In system's idle condition, wait for detection signal is isolated and level switch module sends remote measurement detection signal or remote control detection signal; If receive the rising edge of the gate-control signal in remote measurement detection signal or the remote control detection signal, then described state machine is transformed into system's ready state; In system's ready state, wait for detection signal is isolated and level switch module sends remote measurement detection signal or remote control detection signal, if receive the trailing edge of the gate-control signal in remote measurement detection signal or the remote control detection signal, described state machine is transformed into system's idle condition; If receive the rising edge of clock signal in remote measurement detection signal or the remote control detection signal, described state machine is transformed into the beginning count status; At the beginning count status, system counter adds 1 on the count results of each clock cycle; If receive the trailing edge and the data-signal of the clock signal in remote measurement detection signal or the remote control detection signal saltus step does not take place, then described state machine is transformed into system's ready state; If receive the data-signal generation saltus step in remote measurement detection signal or the remote control detection signal, then described state machine is transformed into and stops count status; Stopping count status, the detection count results of system counter is being latched, be transformed into system mode then and judge state; Judge state in system mode, count results compared with setting threshold that misjudgment occurrence type and time of origin produce the warning or the information that reports an error according to preestablishing different threshold values, and send the described warning or the information that reports an error; Described state machine is transformed into system's ready state.

9. the method for the error detection alarming of the PCM signal monitoring device with error detection alarming function according to claim 6, it is characterized in that the first clock signal duty cycle error detection logic state machine is identical with the course of work of second clock signal dutyfactor error detection logic state machine, they include five states: system's idle condition, system's ready state, begin count status, stop count status and system mode and judge state; In system's idle condition, wait for detection signal is isolated and level switch module sends remote measurement detection signal or remote control detection signal; If receive the rising edge of the gate-control signal in remote measurement detection signal or the remote control detection signal, then described state machine is transformed into system's ready state; In system's ready state, wait for detection signal is isolated and level switch module sends remote measurement detection signal or remote control detection signal, if receive the trailing edge of the gate-control signal in remote measurement detection signal or the remote control detection signal, described state machine is transformed into system's idle condition; If receive the rising edge of clock signal in remote measurement detection signal or the remote control detection signal, described state machine is transformed into the beginning count status; At the beginning count status, system counter adds 1 on the count results of each clock cycle; If receive the trailing edge of the clock signal in remote measurement detection signal or the remote control detection signal, then described state machine is transformed into and stops count status; Stopping count status, the detection count results of system counter is being latched, be transformed into system mode then and judge state; Judge state in system mode, count results compared with setting threshold that misjudgment occurrence type and time of origin produce the information that reports an error according to preestablishing different threshold values, and send the described information that reports an error; Described state machine is transformed into system's ready state.

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