Fault detection interface device and laser range finder

Abstract

The invention discloses a fault detection interface device and a laser range finder. The device comprises a control module, and a communication interface circuit, a data display circuit, a voltage sampling circuit, a key array circuit and a signal trigger circuit which are connected with the control module, the control module serves as a core and is responsible for responding to an external signal, generating a control signal and resolving data information; the communication interface circuit realizes serial port communication with a superior system and a subordinate unit; the data display circuit displays the key data; the voltage sampling circuit detects key voltage; the key array circuit triggers a command through a key; the signal trigger circuit converts the level signal. According to the invention, troubleshooting of various fault points is realized through keys, including verification of a PE trigger signal state sent by a superior overall system, a communication state from external communication of the single-machine subsystem to the superior overall system, an internal communication state of the single-machine subsystem, working voltage of key components and a distance measurement function; therefore, the troubleshooting range is narrowed, and the fault detection efficiency is improved.

Description

Technical Field

[0001] The invention belongs to the technical field of laser distance measurement, and in particular relates to a fault detection interface device and a laser distance meter. Background Art

[0002] This stand-alone subsystem (laser rangefinder) is controlled by the superior overall system (photoelectric system) to realize the function of stand-alone laser ranging and status information feedback. However, during the overall use and debugging process, when the superior overall system receives abnormal status feedback information from the stand-alone subsystem, the fault point is not clear enough due to the limited feedback information and test points, thus indicating that the stand-alone subsystem is working abnormally. For example, when the superior overall system sends a PE ranging signal to the subsystem, if the stand-alone subsystem fails to effectively respond to the PE ranging signal or fails to normally feedback effective information to the superior overall system, a detailed analysis may involve a variety of reasons, such as: abnormal PE ranging signal waveform, abnormal PE ranging signal transmission, abnormal ranging function of the stand-alone subsystem, or abnormal status information feedback of the stand-alone subsystem. Therefore, how to quickly detect the fault of the subsystem status is the key to improving fault detection efficiency and saving manpower and material resources. Summary of the invention

[0003] The purpose of the present invention is to provide a fault detection interface device and a laser rangefinder to perform fault detection on a single subsystem, so as to narrow the scope of equipment fault investigation, improve fault detection efficiency, and save manpower and material resources.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: In a first aspect, the present invention provides a fault detection interface device, the device comprising a control module, and a communication interface circuit, a data display circuit, a voltage sampling circuit, a key array circuit and a signal trigger circuit connected to the control module; The control module is a control circuit used for responding to external signals, generating control signals and solving data information; The communication interface circuit includes a first communication interface circuit and a second communication interface circuit, which respectively communicate with the upper overall system and the lower unit of the stand-alone subsystem through serial ports; wherein the first communication interface circuit communicates with the upper overall system to receive and send data, and after the data is parsed by the control module, realizes the response to the command of the upper overall system and the command forwarding function; the second communication interface circuit communicates with the lower unit of the stand-alone subsystem to receive and send data, and after the data is parsed by the control module, realizes the control of the lower unit of the stand-alone subsystem and the data forwarding function; The data display circuit realizes the digital tube display of the key data of the stand-alone subsystem, including the digital tube and the digital tube driving circuit; wherein the key data includes the distance measurement result and the voltage sampling value; The voltage sampling circuit realizes sampling and detection of the key voltage of this stand-alone subsystem to obtain the voltage sampling value; The control module also includes a software control unit for analyzing the signals input from the superior overall system or the stand-alone subsystem and generating control signals; The key array circuit includes a plurality of keys, and the keys are used to trigger related commands; the control module executes related operations after receiving the related triggering commands of the key array circuit, and transmits the related information through the communication interface circuit or displays it through the data display circuit; The signal trigger circuit is connected to the lower-level unit of this stand-alone subsystem, and is used to convert the level signal generated by the control module into a differential signal and transmit it to the lower-level unit of this stand-alone subsystem; the signal trigger circuit is controlled by relevant keys, and the control module generates a level signal after receiving the trigger command of the relevant key, and realizes level conversion through the signal trigger circuit and reaches the lower-level unit of this stand-alone subsystem.

[0005] In the above scheme, during the troubleshooting process, a PE signal is directly generated through the first button in the button array circuit, the control module and the signal trigger circuit, and the state of the PE trigger signal sent by the superior overall system is verified: the generated PE signal is directly transmitted to the lower unit of the present stand-alone subsystem for the ranging function. If the present stand-alone subsystem normally feeds back the ranging result to the superior overall system, it is verified that the state of the PE signal in the superior overall system is abnormal; if the superior overall system does not receive the ranging result fed back by the present stand-alone subsystem, it cannot be ruled out that the phenomenon that the present stand-alone subsystem cannot measure the distance is related to the state of the PE trigger signal, and it is necessary to continue troubleshooting; when, through subsequent troubleshooting, it has been determined that the communication between the present stand-alone subsystem and the superior overall system is normal, the internal communication of the present stand-alone subsystem is normal, the key voltage is normal, and the ranging function is normal, it can be determined that the current phenomenon that the present stand-alone subsystem cannot measure the distance is caused by the abnormal state of the PE trigger signal.

[0006] In the above scheme, during the troubleshooting process, the heartbeat message instruction of the stand-alone subsystem is generated by the second button in the button array circuit, the control module and the first communication interface circuit, and the communication status between the stand-alone subsystem and the superior overall system is verified: when the second button is pressed, after the control module receives the trigger signal generated by the second button, the control module generates a frame of heartbeat message instruction and sends it to the first communication interface circuit. If the superior overall system does not receive the data frame, it indicates that the communication status between the sending end of the first communication interface circuit and the superior overall system is abnormal; if the superior overall system receives the data frame, it indicates that the data sending end of the first communication interface circuit is normal.

[0007] In the above scheme, during the troubleshooting process, a self-test query instruction is generated by the third button in the button array circuit, the control module, the first communication interface circuit and the second communication interface circuit to verify the internal communication status of the stand-alone subsystem: when the third button is pressed, after the control module receives the trigger signal generated by the third button, the control module sends a self-test instruction to the second communication interface circuit. Under normal circumstances at the sending end of the first communication interface circuit, if the superior overall system does not receive a feedback on the self-test instruction, it indicates that the internal communication status of the stand-alone subsystem is abnormal; if the superior overall system receives a self-test feedback instruction, it indicates that the internal communication status of the stand-alone subsystem is normal.

[0008] In the above scheme, during the troubleshooting process, the operating voltage of the key components of the stand-alone subsystem is sampled through the fourth button in the button array circuit, the control module, the voltage sampling circuit and the data display circuit to determine whether the operating voltage is normal: when the fourth button is pressed, the control module receives the trigger signal generated by the fourth button, and the control module samples the key voltage of the stand-alone subsystem through the sampling circuit, and displays the sampling result in the digital tube; based on the voltage value displayed in the digital tube, it is determined whether the key components of the current stand-alone subsystem are working normally.

[0009] In the above scheme, during the troubleshooting process, a distance measurement instruction is generated by the fifth button in the button array circuit, the control module, the first communication interface circuit and the second communication interface circuit to verify the distance measurement function of the stand-alone subsystem: when the fifth button is pressed, after the control module receives the trigger signal generated by the fifth button, the control module sends a distance measurement instruction to the second communication interface circuit. When the second communication interface circuit is normal, the instruction is sent to the distance measurement module of the stand-alone subsystem. If the distance measurement module is normal, the distance measurement result calculated by the distance measurement module is returned to the control module through the second communication interface circuit. The control module then sends the distance measurement result to the superior overall system through the first communication interface circuit, and displays the distance measurement result in the digital tube at the same time. If the superior overall system cannot receive the distance measurement result, and the digital tube cannot display the distance measurement value, it indicates that the distance measurement module of the stand-alone subsystem is abnormal.

[0010] In the above scheme, the control module adopts a control circuit with an MCU chip as the core, and the software control unit is arranged in the central processing unit MCU.

[0011] In the above scheme, both the first communication interface circuit and the second communication interface circuit use isolated serial port chips to perform serial port communication with the upper-level overall system and the lower-level unit of the stand-alone subsystem respectively.

[0012] In the above solution, if the voltage sampling circuit needs to sample multiple voltage signals, multiple sampling circuits are matched.

[0013] In a second aspect, the present invention further provides a laser rangefinder, which includes the fault detection interface device described in any one of the above.

[0014] In general, the above technical solutions conceived by the present invention can achieve the following beneficial effects compared with the prior art: The present invention provides an interface device suitable for narrowing the fault detection range and improving the fault detection efficiency when the laser rangefinder has abnormal functions in the photoelectric system. The interface device realizes various fault point troubleshooting through relevant buttons, including verifying the PE trigger signal status sent by the superior overall system, the communication status between the stand-alone subsystem and the superior overall system, the internal communication status of the stand-alone subsystem, the working voltage of the key components of the stand-alone subsystem, and the distance measurement function of the stand-alone subsystem. It is safe and convenient, simple to operate, has low technical requirements for on-site operators, is highly practical, and can save manpower and material resources. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a diagram of the fault detection device architecture; Figure 2 is a schematic diagram of a fault detection device; Figure 3 This is the interface diagram of the host computer of the fault detection device; Figure 4 This is the principle block diagram of generating PE signal through external triggering of key, which is used to verify whether the PE signal is normal; Figure 5 A principle block diagram of realizing a message feedback command by external triggering of a key, which is used to verify whether the first communication interface circuit is normal; Figure 6 The principle block diagram of realizing the self-check query command through external triggering of a key is used to verify the integrity of the communication interface circuit function; Figure 7 The principle block diagram of realizing the query of voltage information of key components through external triggering of buttons is used to verify whether the voltage of key components is working normally; Figure 8 This is a principle block diagram for implementing distance measurement instructions through external button triggering and displaying the results, which is used to verify whether the distance measurement function of the device is normal. DETAILED DESCRIPTION

[0016] In order to make the purpose, technical solutions and advantages of the present invention more clearly understood, the present invention is further described in detail below in conjunction with the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention. In addition, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0017] Laser ranging is the core function of this stand-alone subsystem. When the superior overall system sends a PE signal to control this stand-alone system to perform ranging, when the equipment and signal are in normal working condition, this stand-alone subsystem performs laser ranging after receiving the PE signal, and feeds back the ranging result to the photoelectric system through the serial communication circuit. However, when the PE signal is abnormal or the working state of this stand-alone subsystem is abnormal, this stand-alone subsystem cannot correctly respond to the ranging command of the superior overall system, or cannot feed back the ranging result to the superior overall system after executing the ranging command, which indicates that this stand-alone subsystem has a fault in the superior overall system. Since this stand-alone subsystem requires strong professionalism in the troubleshooting process, and improper operation is likely to cause damage to personnel and equipment, the fault detection interface device can narrow the scope of troubleshooting and improve troubleshooting efficiency.

[0018] The embodiment of the present invention provides a fault detection interface device, which is applied to a laser rangefinder device, such as Figure 1 , Figure 2 and Figure 3 As shown, the fault detection interface device includes: a control module, a communication interface circuit, a data display circuit, a voltage sampling circuit, a key array circuit and a signal trigger circuit.

[0019] The control module is a control circuit with MCU chip as the core, which is used for responding to external signals, generating control signals and solving data information. External signals include communication data signals of the upper overall system, lower units in this stand-alone subsystem, trigger signals generated by each button and voltage sampling signals obtained by the sampling circuit. By analyzing these signals, corresponding control signals are generated.

[0020] The communication interface circuit includes two communication interface circuits, both of which use isolated serial port chips to communicate with the upper overall system and the lower unit of the stand-alone subsystem through serial ports. The first communication interface circuit communicates with the upper overall system to receive and send data, and after the control module analyzes the data, it realizes the response to the upper system command and the command forwarding function; the second communication interface circuit communicates with the lower unit of the stand-alone subsystem to receive and send data, and after the control module analyzes the data, it realizes the control of the lower unit of the stand-alone subsystem and the data forwarding function.

[0021] The data display circuit realizes the digital tube display of the key data of this stand-alone subsystem, such as the distance measurement result (obtained by the distance measurement module of this stand-alone subsystem), the voltage sampling value (obtained by the voltage sampling circuit), etc., including the digital tube and the digital tube driving circuit.

[0022] The voltage sampling circuit realizes sampling and detection of the key voltage of this stand-alone subsystem. If multiple voltage signals need to be sampled, multiple sampling circuits can be matched.

[0023] The control module also includes a software control unit; the software control unit is arranged in the central processing unit MCU, and the software control unit is used to analyze the signal input from the upper overall system or the stand-alone subsystem and generate the control signal.

[0024] The key array circuit includes a plurality of keys, and the keys are used to trigger commands. In this embodiment, there are first to fifth keys, corresponding to five troubleshooting processes respectively.

[0025] After receiving the trigger command from the key array, the control module executes the relevant operation and transmits the information through the communication interface circuit or displays it through the digital tube display circuit; The signal trigger circuit includes a differential chip, a TVS tube, etc. The differential chip is used to convert the level signal generated by the control module into a differential signal and transmit it to the lower unit of the stand-alone subsystem. The TVS is used in the circuit to protect the bus side pins of the differential chip. The signal trigger circuit is controlled by a key. After receiving the key signal, the control module generates a level signal, and realizes level conversion through the signal trigger circuit to reach the lower-level unit of this stand-alone subsystem.

[0026] like Figure 4 As shown, during the troubleshooting process, the PE signal is directly generated through the first button in the button array, the control module and the signal trigger circuit in the device, and the PE trigger signal status sent by the superior overall system can be verified. The generated PE signal is directly transmitted to the lower unit of this stand-alone subsystem for the distance measurement function. If this stand-alone subsystem normally feeds back the distance measurement result to the superior overall system, it can be verified that the PE signal status in the superior overall system is abnormal; if the superior overall system does not receive the distance measurement result fed back by this stand-alone subsystem, it cannot be ruled out that the phenomenon that this stand-alone subsystem cannot measure the distance is related to the PE trigger signal status, and other fault points need to be checked. When it has been determined that the communication between this stand-alone subsystem and the superior overall system is normal, the internal communication of this stand-alone subsystem is normal, the key voltage is normal, and the distance measurement function is normal, it can be determined that the current phenomenon that this stand-alone subsystem cannot measure the distance is caused by the abnormal PE trigger signal status.

[0027] like Figure 5As shown, during the troubleshooting process, the heartbeat message instruction of the stand-alone subsystem is generated by the second button in the button array, the control module and the first communication interface circuit in the device, and the communication status between the stand-alone subsystem and the upper overall system can be verified. When the second button is pressed, after the control module receives the trigger signal generated by the second button, the control module generates a frame of heartbeat message instruction and sends it to the first communication interface circuit. If the upper system does not receive the data frame, it indicates that the communication status between the sending end of the first communication interface circuit and the upper overall system is abnormal; if the upper system receives the data frame, it indicates that the data sending end of the first communication interface circuit is normal, and other fault points can be checked.

[0028] like Figure 6 As shown, during the troubleshooting process, the internal communication status of the stand-alone subsystem can be verified by generating a self-check query instruction through the third button in the button array, the control module, the first communication interface circuit, and the second communication interface circuit. When the third button is pressed, the control module receives the trigger signal generated by the third button, and then sends a self-check instruction to the second communication interface circuit. Under normal circumstances, if the upper overall system does not receive a self-check instruction feedback when the first communication interface circuit sends, it indicates that the internal communication status of the stand-alone subsystem is abnormal; if the upper overall system receives a self-check feedback instruction, it indicates that the internal communication status of the stand-alone subsystem is normal, and other fault points can be checked.

[0029] like Figure 7 As shown, during the troubleshooting process, the operating voltage of the key components of the stand-alone subsystem is sampled through the fourth button in the button array, the control module, the voltage sampling circuit and the data display circuit to determine whether the operating voltage is normal. When the fourth button is pressed, the control module receives the trigger signal generated by the fourth button, and the control module samples the key voltage of the stand-alone subsystem through the sampling circuit, and displays the sampling result in the digital tube. According to the voltage value displayed in the digital tube, it is determined whether the key components of the current stand-alone subsystem are working normally. If the voltage value is within a reasonable value range, other fault points can be checked.

[0030] like Figure 8As shown, during the troubleshooting process, the distance measurement function of this stand-alone subsystem can be verified by generating a distance measurement instruction through the fifth button in the button array, the control module, the first communication interface circuit, and the second communication interface circuit. When the fifth button is pressed, the control module receives the trigger signal generated by the fifth button, and then sends a distance measurement instruction to the second communication interface circuit. When the second communication interface circuit is normal, the instruction is sent to the distance measurement module of this stand-alone subsystem. If the distance measurement module is normal, the distance measurement result calculated by the distance measurement module is returned to the control module of the interface device through the second communication interface circuit. The control module then sends the distance measurement result to the upper-level overall system through the first communication interface circuit, and displays the distance measurement result in the digital tube at the same time; if the upper-level overall system cannot receive the distance measurement result, and the digital tube cannot display the distance measurement value, it indicates that the distance measurement module of this stand-alone subsystem is abnormal, and the above can complete the verification of the functional status of the distance measurement module.

[0031] In addition, the present invention also provides a laser rangefinder, which includes any one of the above-mentioned fault detection interface devices.

[0032] In summary, the present invention provides a fault detection interface device and a laser rangefinder for quickly troubleshooting the single-machine subsystem (laser rangefinder equipment) in the superior overall system (photoelectric system) when the ranging function is abnormal or the state feedback is abnormal. Various fault point troubleshooting can be achieved through relevant buttons to narrow the scope of fault troubleshooting, improve fault detection efficiency, and save manpower and material resources.

[0033] It should be noted that the size of the serial numbers of the steps in the above embodiments does not mean the order of execution. The execution order of each process should be determined by its function and internal logic, and should not constitute any limitation on the implementation process of the embodiments of the present application.

[0034] It should be pointed out that, according to the needs of implementation, the various steps / components described in this application can be split into more steps / components, and two or more steps / components or partial operations of steps / components can be combined into new steps / components to achieve the purpose of the present invention.

[0035] It will be easily understood by those skilled in the art that the above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions and improvements made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fault detection interface device, characterized in that: The device includes a control module, and a communication interface circuit, a data display circuit, a voltage sampling circuit, a key array circuit and a signal trigger circuit connected to the control module; The control module is a control circuit used for responding to external signals, generating control signals and calculating data information; The communication interface circuit includes a first communication interface circuit and a second communication interface circuit, which respectively communicate with the upper overall system and the lower unit of the stand-alone subsystem through serial ports; wherein the first communication interface circuit communicates with the upper overall system to receive and send data, and after the data is parsed by the control module, realizes the response to the command of the upper overall system and the command forwarding function; the second communication interface circuit communicates with the lower unit of the stand-alone subsystem to receive and send data, and after the data is parsed by the control module, realizes the control of the lower unit of the stand-alone subsystem and the data forwarding function; The data display circuit realizes the digital tube display of the key data of the stand-alone subsystem, including a digital tube and a digital tube driving circuit; wherein the key data includes the distance measurement result and the voltage sampling value; The voltage sampling circuit performs sampling detection on the key voltage of the stand-alone subsystem to obtain the voltage sampling value; The control module also includes a software control unit for analyzing the signal input from the upper overall system or the stand-alone subsystem and generating the control signal; The key array circuit includes a plurality of keys, and the keys are used to trigger related commands; the control module executes related operations after receiving the related triggering commands of the key array circuit, and transmits the related information through the communication interface circuit or displays it through the data display circuit; The signal trigger circuit is connected to the lower-level unit of this stand-alone subsystem, and is used to convert the level signal generated by the control module into a differential signal and transmit it to the lower-level unit of this stand-alone subsystem; the signal trigger circuit is controlled by relevant keys, and the control module generates a level signal after receiving the trigger command of the relevant key, and realizes level conversion through the signal trigger circuit, which reaches the lower-level unit of this stand-alone subsystem.

2. The fault detection interface device according to claim 1, characterized in that: During the troubleshooting process, a PE signal is directly generated through the first button in the button array circuit, the control module and the signal trigger circuit, and the state of the PE trigger signal sent by the superior overall system is verified: the generated PE signal is directly transmitted to the lower unit of the stand-alone subsystem for the ranging function. If the stand-alone subsystem normally feeds back the ranging result to the superior overall system, it is verified that the PE signal state in the superior overall system is abnormal; if the superior overall system does not receive the ranging result fed back by the stand-alone subsystem, it cannot be ruled out that the phenomenon that the stand-alone subsystem cannot measure the distance is related to the PE trigger signal state, and it is necessary to continue troubleshooting; when, through subsequent troubleshooting, it has been determined that the communication between the stand-alone subsystem and the superior overall system is normal, the internal communication of the stand-alone subsystem is normal, the key voltage is normal, and the ranging function is normal, it is determined that the current phenomenon that the stand-alone subsystem cannot measure the distance is caused by the abnormal state of the PE trigger signal.

3. The fault detection interface device according to claim 1, characterized in that: During the troubleshooting process, the heartbeat message instruction of the stand-alone subsystem is generated through the second button in the button array circuit, the control module and the first communication interface circuit, and the communication status between the stand-alone subsystem and the superior overall system is verified: when the second button is pressed, the control module receives the trigger signal generated by the second button, and then the control module generates a frame of heartbeat message instruction and sends it to the first communication interface circuit. If the superior overall system does not receive the data frame, it indicates that the communication status between the sending end of the first communication interface circuit and the superior overall system is abnormal; If the superior overall system receives the data frame, it indicates that the data sending end of the first communication interface circuit is normal.

4. The fault detection interface device according to claim 3, characterized in that: During the troubleshooting process, a self-test query instruction is generated through the third button in the button array circuit, the control module, the first communication interface circuit and the second communication interface circuit to verify the internal communication status of the stand-alone subsystem: when the third button is pressed, after the control module receives the trigger signal generated by the third button, the control module sends a self-test instruction to the second communication interface circuit. Under normal circumstances at the sending end of the first communication interface circuit, if the superior overall system does not receive a feedback on the self-test instruction, it indicates that the internal communication status of the stand-alone subsystem is abnormal; if the superior overall system receives a self-test feedback instruction, it indicates that the internal communication status of the stand-alone subsystem is normal.

5. The fault detection interface device according to claim 1, characterized in that: During the troubleshooting process, the operating voltage of the key components of the stand-alone subsystem is sampled through the fourth button in the button array circuit, the control module, the voltage sampling circuit and the data display circuit to determine whether the operating voltage is normal: when the fourth button is pressed, the control module receives the trigger signal generated by the fourth button, and the control module samples the key voltage of the stand-alone subsystem through the sampling circuit, and displays the sampling result in the digital tube; based on the voltage value displayed in the digital tube, it is determined whether the key components of the current stand-alone subsystem are working normally.

6. The fault detection interface device according to claim 1, characterized in that: During the troubleshooting process, a distance measurement instruction is generated through the fifth button in the button array circuit, the control module, the first communication interface circuit and the second communication interface circuit to verify the distance measurement function of the stand-alone subsystem: when the fifth button is pressed, after the control module receives the trigger signal generated by the fifth button, the control module sends a distance measurement instruction to the second communication interface circuit. When the second communication interface circuit is normal, the instruction is sent to the distance measurement module of the stand-alone subsystem. If the distance measurement module is normal, the distance measurement result calculated by the distance measurement module is returned to the control module through the second communication interface circuit. The control module then sends the distance measurement result to the superior overall system through the first communication interface circuit, and displays the distance measurement result in the digital tube at the same time. If the superior overall system cannot receive the distance measurement result, and the digital tube cannot display the distance measurement value, it indicates that the distance measurement module of the stand-alone subsystem is abnormal.

7. The fault detection interface device according to claim 1, characterized in that: The control module adopts a control circuit with an MCU chip as the core, and the software control unit is arranged in the central processing unit MCU.

8. The fault detection interface device according to claim 1, characterized in that: The first communication interface circuit and the second communication interface circuit both use isolated serial port chips to perform serial port communications with the upper overall system and the lower unit of the stand-alone subsystem respectively.

9. The fault detection interface device according to claim 1, characterized in that: If the voltage sampling circuit needs to sample multiple voltage signals, multiple sampling circuits are matched.

10. A laser rangefinder, characterized in that: The laser rangefinder comprises the fault detection interface device according to any one of claims 1 to 9.

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