Modularized multichannel vibrating wire data collecting and transmitting device

Abstract

The utility model relates to the technical field of data acquisition, in particular to a modularized multichannel vibrating wire data acquisition and transmission device, which comprises a channel transmission module, a vibrating wire acquisition module and a processing module, and is characterized in that the processing module comprises a first microprocessor, and the channel transmission module, the vibrating wire acquisition module and the first microprocessor are mutually connected in pairs; the channel transmission module comprises a plurality of relay interface modules; the relay interface module comprises a relay group and a second microprocessor, the second microprocessor is respectively connected with the relay group and the first microprocessor, and the output end of the relay group is connected with the vibrating wire acquisition module; the first microprocessor is used for processing data transmitted by the vibrating wire acquisition module; and the second microprocessor is used for controlling the relay group to switch the vibrating wire data acquisition channel. According to the utility model, the technical problems of limited system stability and inflexible function expansion caused by large workload of a microprocessor when a large number of sensors are deployed in an engineering structure in the conventional vibrating wire data acquisition and transmission device are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to data acquisition technical field, specifically, relate to a kind of modular multi-channel vibrating string data acquisition device. BACKGROUND

[0002] Vibrating string data acquisition device is a kind of equipment specially used for collecting and sending vibrating string sensor data, not only applied to the health monitoring of bridge, tunnel, dam and other civil engineering structures, but also used for monitoring geological disasters such as landslides and ground subsidence.In the above scenarios, vibrating string sensors are installed in key positions, such as bridge piers, beam bodies and other parts of the bridge, and different stratum depths buried in the mountain, and vibrating string data acquisition device collects stress, strain and other data of vibrating string sensor;When data changes abnormally (such as sudden increase of stress data or strain data beyond normal range), it may indicate that the engineering structure has potential safety hazards, and staff need to be notified immediately to take measures such as maintenance and reinforcement.

[0003] The multi-channel vibrating string data acquisition device on the market has high cost.In large scenes, such as monitoring of large bridges or large building groups, a large number of channels are needed to connect a large number of vibrating string sensors.Because only multiple multi-channel vibrating string data acquisition devices can be selected, the number of channels is increased by stacking devices, which results in a doubling of the cost.

[0004] The Chinese utility model patent with the patent name "Multi-channel vibrating string acquisition instrument based on FPGA parallel processing" and the announcement number CN213067929U has been disclosed, which comprises an FPGA logic control circuit, a communication circuit, a storage circuit, an excitation circuit and N parallel connected signal acquisition units, each signal acquisition unit is connected with a plurality of vibrating string sensors, and the data of the plurality of vibrating string sensors is transmitted through the same channel to collect the data, which expands the collection range while reducing the use cost, but the working load of the FPGA logic control circuit of the patent is heavy, and once the processor fails, the relay control and data acquisition may fail simultaneously;And it is not easy to expand or adjust the function, which is limited in use. UTILITY MODEL CONTENT

[0005] The purpose of the present application is to provide a modular multi-channel vibrating string data acquisition device, which solves the technical problems of large working load of microprocessor and limited system stability and inflexible function expansion when a large number of sensors are deployed in the existing vibrating string data acquisition device in engineering structure.

[0006] In order to solve the above technical problems, the scheme adopted by the present application is as follows:

[0007] The utility model provides a kind of modular multi-channel vibrating string data acquisition device, it is characterized by: including channel transmission module, vibrating string acquisition module, processing module, the processing module includes first microprocessor, channel transmission module, vibrating string acquisition module, first microprocessor are pairwise interconnected;The channel transmission module includes a plurality of relay interface module group;The relay interface module group includes relay group, second microprocessor, the second microprocessor is connected with the relay group, first microprocessor respectively, the output of the relay group is connected with the vibrating string acquisition module;

[0008] The first microprocessor is used for processing the data transmitted by the vibrating string acquisition module.

[0009] The second microprocessor is used for controlling the relay group to switch vibrating string data acquisition channel.

[0010] The vibrating string acquisition module collects the data monitored by the vibrating string sensor through the channel transmission module.

[0011] In some embodiments, the relay interface module further includes a plurality of optocoupler driving circuits, and the second microprocessor is connected with the relay group through the plurality of optocoupler driving circuits.

[0012] In some embodiments, the relay group includes a plurality of relays, the output ends of the plurality of relays are connected and an output end is arranged thereon as a data output end of the relay group, and the control ends of the plurality of relays are connected with the plurality of optocoupler driving circuits one by one.

[0013] In some embodiments, the plurality of relays are all double-pole double-throw relays, and the double-pole double-throw relays are of HFD4 / 3 type.

[0014] In some embodiments, the channel transmission module further includes an isolation RS485 driving chip, and the second microprocessor is connected with the first microprocessor through the isolation RS485 driving chip.

[0015] In some embodiments, the channel transmission module further includes a memory and a rotary dial switch, and the memory and the rotary dial switch are connected with the second microprocessor respectively.

[0016] In some embodiments, the processing module further includes a communication module, and the communication module is connected with the first microprocessor.

[0017] In some embodiments, the communication module includes a Beidou short message module, a mobile communication module and a LORA module, and the Beidou short message module, the mobile communication module and the LORA module are connected with the first microprocessor respectively.

[0018] In some embodiments, the model of the first microprocessor is STM32F767IGT6.

[0019] In some embodiments, the model of the second microprocessor is STM32L051C8T6.

[0020] The technical scheme of the present application has at least the following advantages and beneficial effects:

[0021] 1. In large engineering structures, when a large number of sensors need to be deployed, the traditional method relies on multiple multi-channel vibrating string data acquisition devices to increase the number of channels by stacking devices. This approach not only increases the cost, but also requires a single microprocessor to undertake heavy data collection and relay channel switching tasks, with a heavy workload. The utility model introduces a relay interface module, effectively increasing the number of sensor access channels. Compared with purchasing additional vibrating string data acquisition devices, the cost of the relay interface module is lower, thereby significantly reducing the overall cost.

[0022] 2. In the utility model, the relay interface module shares the workload of the first microprocessor, ensuring the orderliness of the relay opening transmission channel, and thereby improving the stability of the entire system. The modular design of the utility model first ensures that even if a certain relay interface module fails, it will not affect the data acquisition work of other modules, ensuring the normal operation of the rest of the system; secondly, when a data acquisition link fails, the staff can quickly lock and check the faulty relay interface module and its related lines, greatly improving the maintenance efficiency; in addition, the modular design of the utility model also provides great flexibility for function expansion or adjustment. If you need to increase or adjust the function, you only need to modify the relevant independent modules, without the need to reconstruct the entire system on a large scale, which makes the maintenance and upgrading of the system more convenient. BRIEF DESCRIPTION OF DRAWINGS

[0023] Fig. 1 is a schematic diagram of the overall structure of the utility model;

[0024] Fig. 2 is a schematic diagram of the structure of a relay interface module of the utility model;

[0025] Fig. 3 is a schematic diagram of a relay interface module of the utility model. DETAILED DESCRIPTION

[0026] With reference to the drawings of the embodiments of the present application, the technical solutions in the embodiments of the present application will be clearly and completely described. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments of the present application, all other embodiments obtained by those skilled in the art without creative work fall within the scope of the present application.

[0027] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, therefore, once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings. If the terms "center", "upper", "lower", "inner", "outer" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship when the product of the application is used, which is only for the convenience of describing the application and simplifying the description, and therefore cannot be understood as indicating or implying that the device or element must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application. It should also be noted that, unless otherwise explicitly specified and limited, if the terms "set", "install", "connect" appear, they should be understood broadly, for example, they can be fixedly connected, or detachably connected, or integrally connected; they can be mechanically connected, or electrically connected; they can be directly connected, or indirectly connected through an intermediate medium, or the connection between two elements can be internal communication. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0028] Embodiment 1

[0029] Please refer to Figs. 1-3 The utility model provides a kind of modular multi-channel vibrating string data acquisition device, including channel transmission module, vibrating string acquisition module, processing module, processing module includes first microprocessor, channel transmission module, vibrating string acquisition module, first microprocessor two two interconnects;Channel transmission module includes a plurality of relay interface module;Relay interface module includes relay group, second microprocessor, second microprocessor is connected with relay group, first microprocessor respectively, and the output end of relay group is connected with vibrating string acquisition module;

[0030] First microprocessor is used to process the data transmitted by vibrating string acquisition module;

[0031] Second microprocessor is used to control the switching vibrating string data acquisition channel of relay group;

[0032] Vibrating string acquisition module acquires the data monitored by vibrating string sensor through channel transmission module.

[0033] It should be explained that the vibrating string sensor connected with the device includes but is not limited to a steel bar meter, an anchor cable meter, a osmotic pressure meter, a soil pressure meter and a displacement meter.

[0034] In the utility model, the model of the first microprocessor is STM32F767IGT6, and the model of the vibrating string acquisition module is VM511.

[0035] In the utility model, the model of the second microprocessor is STM32L051C8T6, the microprocessor is low in cost and power consumption, and the number of interfaces meets the requirements of the device.

[0036] In the utility model, the output ends of all the relay interface modules are connected and an output end is arranged thereon as an output end of the channel transmission module, and the output end is connected with the vibrating string acquisition module and the processing module; the utility model uses a polling data acquisition mode to complete vibrating string data acquisition, and meets the purpose of general long-term monitoring requirements.

[0037] Further, the relay interface module further comprises a plurality of optocoupler driving circuits, and the second microprocessor is connected with the relay group through the plurality of optocoupler driving circuits. The optocoupler driving circuit functions to isolate the input and output circuits, and controls the switching of the relay according to the signal of the second microprocessor.

[0038] Further, the optocoupler isolation driving circuit comprises an optocoupler chip U1, a transistor Q1 and Q2, and resistors R1, R2, R3 and R4.

[0039] Specifically, the base of the transistor Q1 is arranged as a P_IN input end, the emitter of the transistor Q1 is connected with a pin 2 of the optocoupler chip U1, one end of the resistor R1 is connected with a pin 1 of the optocoupler chip U1, the other end of the resistor R1, one end of the resistor R2 and the emitter of the transistor Q2 are connected and connected with a power supply; the other end of the resistor R2, one end of the resistor R3 and a pin 4 of the optocoupler chip U1 are connected, the other end of the resistor R3 is connected with the base of the transistor Q2, the collector of the transistor Q2 is connected with one end of the resistor R4, and a P_OUT output end is arranged at the position, and the other end of the resistor R4, a pin 3 of the optocoupler chip U1 and the collector of the transistor Q1 are connected and grounded.

[0040] It should be noted that the P_IN input end is connected with an IO port for receiving vibrating string data of the second microprocessor, and the P_OUT output end is connected with a relay control end.

[0041] It should be noted that in the embodiment, the transistor Q1 and the transistor Q2 are both PNP type, and the model of the optocoupler chip U1 is PC357C.

[0042] In some embodiments, the second microprocessor is connected with the plurality of opto-coupler driving circuits through a decoder, which is used to prevent the plurality of opto-coupler driving circuits from occupying too many IO ports of the second microprocessor; and the model of the decoder is SN74LS138NS.

[0043] In the utility model, the relay group includes a plurality of relays, the output ends of the plurality of relays are connected and the output end at the place is set as the data output end of the relay group;The control end of the plurality of relays is connected with the plurality of opto-coupler driving circuits one by one;

[0044] It should be noted that, in the embodiment, the number of relays in the relay group includes but is not limited to 4, 8 and 16.

[0045] It should be explained that when the second microprocessor sends signals to the control end of the relay through the opto-coupler driving circuit, the relay is opened, and the vibration string sensor connected with the relay starts to transmit data;In the embodiment, the plurality of relays are double-pole double-throw relays, and the model of the double-pole double-throw relay is HFD4 / 3.

[0046] The channel transmission module further includes an isolation RS485 driving chip, and the second microprocessor is connected with the first microprocessor through the isolation RS485 driving chip;

[0047] It should be explained that the first microprocessor and the second microprocessor communicate through the RS485 interface;The isolation RS485 driving chip is used to provide electrical isolation in the RS485 communication line to enhance the anti-interference ability and safety of the system.

[0048] The channel transmission module further includes a memory and a rotary dial switch, and the memory and the rotary dial switch are connected with the second microprocessor respectively;

[0049] It should be explained that the memory is an EEPROM memory, and the model of the EEPROM memory is AT24C128, which is used to store configuration information, and the configuration information includes but is not limited to RS485 bus address and communication baud rate;The model of the rotary dial switch is MHR-10, which is used to manually configure the RS485 bus address of the relay interface module, so as to increase the measurement channel during on-site installation.

[0050] It should be explained that the staff configures the RS485 bus address of each relay interface module by rotating the dial switch of each relay interface module, so as to allocate a unique identifier for each relay interface module on the RS485 bus.

[0051] It should be noted that in the embodiment, the channel transmission module is configured with a centralized external interface, and the channel transmission module is connected with the processing module through the centralized external interface; the centralized external interface includes but is not limited to an RS485 interface, a tuning fork signal interface and a power supply interface.

[0052] The processing module further comprises a communication module connected with the first microprocessor.

[0053] Further, the communication module comprises a Beidou short message module, a mobile communication module and a LORA module, and the Beidou short message module, the mobile communication module and the LORA module are respectively connected with the first microprocessor.

[0054] It should be explained that the Beidou short message module is used to return the data of the sensor collected by the device in the absence of 4G signal; the LORA module is used for wireless communication in a local range, such as collecting sensor data with LORA function; the mobile communication module is used for data return in a conventional environment, including sensor data collected by the device, sending and receiving instructions.

[0055] It should be noted that the mobile communication module includes but is not limited to a 4G communication module and a 5G communication module.

[0056] The processing module further comprises an EMMC memory, a USB interface, a state indicating lamp and an isolated relay output interface, and the EMMC memory, the USB interface, the state indicating lamp and the isolated relay output interface are respectively connected with the first microprocessor.

[0057] It should be explained that the EMMC memory is used to store the sensor data collected by the device; the USB interface is used to connect a notebook computer, a handheld debugging instrument and other equipment to realize local data reading and parameter configuration of the device; the state indicating lamp is used to indicate the running state of the device, which includes but is not limited to a power indicating lamp, a LORA communication state indicating lamp, a mobile network indicating lamp, a Beidou communication indicating lamp, a data sending indicating lamp and a device running indicating lamp; and the isolated relay output interface is used to connect a sound and light alarm and other equipment.

[0058] In the utility model, a power module is further included, which converts 220V voltage into 12V voltage to meet the power supply demand of the field monitoring equipment; the power module includes but is not limited to a solar cell panel, a wind power generation device and a storage battery.

[0059] The utility model discloses a relay interface module is added to realize the purpose of the growth of sensor access channel quantity, and the cost of a relay interface module is far lower than a vibration string data acquisition device, and this effectively solves the technical problem of cost increase in the large engineering structure when needing numerous sensors, and the vibration string data acquisition device of the past can only rely on multiple channel vibration string data acquisition device, and the mode of superposition equipment is used to expand the channel quantity, thereby causing the cost to rise.

[0060] For the convenience of understanding, suppose that 10 relay interface modules are configured in the device, if 16 channels are selected for each relay interface module, then the device can access 160 vibration string sensors at most, thereby realizing the increase of sensor access channel.

[0061] It needs to be explained that in the embodiment, if the address of the relay interface module is not limited by the rotary dial switch, the maximum address of RS485 can be designed as 48, that is, the device can access 48 relay interface modules at most, if 16 channels are selected for each module, then the maximum number of sensors accessed by the device is 768.

[0062] It needs to be explained that the above-mentioned electronic devices can be bought in the domestic and foreign markets.

[0063] Up to now, the embodiments of the utility model have been described in detail. In order to avoid the shielding of the concept of the utility model, some details known in the art are not described. According to the above description, the person skilled in the art can fully understand how to implement the technical scheme of the utility model, and the scope of the utility model is defined by the appended claims.

Claims

1. A modular multi-channel vibrating wire data acquisition and transmission device, characterized in that: Channel transmission module, vibration string acquisition module, processing module, the processing module includes a first microprocessor, the channel transmission module, vibration string acquisition module, first microprocessor two two interconnects;The channel transmission module includes a plurality of relay interface module;The relay interface module includes a relay group, a second microprocessor, the second microprocessor is connected with the relay group, first microprocessor respectively, the output end of the relay group is connected with the vibration string acquisition module; The first microprocessor is used for processing the data transmitted by the vibration string acquisition module; The second microprocessor is used for controlling the relay group to switch the vibration string data acquisition channel; The vibration string acquisition module collects the data monitored by the vibration string sensor through the channel transmission module.

2. The modular multi-channel vibrating string data acquisition device of claim 1, wherein, The relay interface module further includes a plurality of optocoupler drive circuits, and the second microprocessor is connected with the relay group through a plurality of optocoupler drive circuits.

3. The modular multi-channel vibrating string data acquisition device of claim 2, wherein, The relay group includes a plurality of relays, the output ends of the plurality of relays are connected and the output ends are arranged as the data output end of the relay group;The control end of the plurality of relays is connected with the plurality of optocoupler drive circuits one by one.

4. The modular multi-channel vibrating string data acquisition device of claim 3, wherein, The plurality of relays are double-pole double-throw relays, and the double-pole double-throw relays are HFD4 / 3.

5. The modular multi-channel vibrating string data acquisition device of claim 1, wherein, The channel transmission module further includes an isolation RS485 drive chip, and the second microprocessor is connected with the first microprocessor through the isolation RS485 drive chip.

6. The modular multi-channel vibrating string data acquisition device of claim 1, wherein, The channel transmission module further includes a memory and a rotary dial switch, and the memory and the rotary dial switch are connected with the second microprocessor respectively.

7. The modular multi-channel vibrating string data acquisition device of claim 1, wherein, The processing module further includes a communication module, and the communication module is connected with the first microprocessor.

8. The modular multi-channel vibrating string data acquisition device of claim 7, wherein, The communication module includes a Beidou short message module, a mobile communication module and a LORA module, and the Beidou short message module, the mobile communication module and the LORA module are connected with the first microprocessor respectively.

9. The modular multi-channel vibrating string data acquisition device of claim 1, wherein, The model of the first microprocessor is STM32F767IGT6.

10. The modular multi-channel vibrating string data acquisition device of claim 1, wherein, The model of the second microprocessor is STM32L051C8T6.

Images