CN218145455U - Measuring device and measuring system based on force cell - Google Patents
Measuring device and measuring system based on force cell Download PDFInfo
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- CN218145455U CN218145455U CN202222545783.4U CN202222545783U CN218145455U CN 218145455 U CN218145455 U CN 218145455U CN 202222545783 U CN202222545783 U CN 202222545783U CN 218145455 U CN218145455 U CN 218145455U
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Abstract
The utility model discloses a measuring device and a measuring system based on a force transducer, which comprises a first connecting part and a second connecting part, wherein the first connecting part and the second connecting part are connected through a connecting rod; the connecting rod is provided with a measuring section, a force measuring sensor is attached to the outer surface of the measuring section, and protective layers are coated on the periphery of the force measuring sensor and the measuring section; the periphery of the measuring section is also provided with a shell, and two ends of the shell are respectively connected with the first connecting part and the second connecting part in a sealing way; the shell is provided with an antenna, and the antenna is in signal connection with the force transducer; the utility model discloses a lifting device and waiting goods handling are connected respectively to two connecting portion again to connect two connecting portions through the connecting rod, and install force cell sensor on connecting portion, like this, can avoid the too big accident that takes place of lifting device atress when the hoist and mount goods the atress condition of real-time detection lifting device (especially hoist and mount arm etc.), unexpected risk when reducing large-scale goods handling.
Description
Technical Field
The utility model belongs to the technical field of the measuring force device, especially, relate to a measuring device and measurement system based on force cell sensor.
Background
With the development of society, the number of oversized and overweight equipment or goods is increased, and the installation and transportation of the equipment or goods usually need the support of heavy equipment, even need the work of a plurality of heavy equipment together.
In the process of loading, unloading and installing the oversized and overweight equipment or goods, the specific heavy equipment is usually selected according to the weight of the oversized and overweight equipment or goods. For example, when installing a tower weighing 10 tonnes, a crane of 15 tonnes may need to be selected.
In a specific operation process, although the heavy weight of the heavy equipment meets the hoisting requirement, due to the limitations of installation angles, scene conditions and the like, accidents may occur in the operation process of the heavy equipment. If a 10-ton iron tower is hoisted by a 15-ton crane, the crane can overturn due to the installation angle of the crane and the application of strong wind in the field.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing a measuring device and measurement system based on force cell sensor can detect the real-time atress condition of heavy equipment during operation through this measuring device, can in time stop when the atress transfinites, avoids unexpected emergence.
The utility model adopts the following technical scheme: a measuring device based on a force transducer comprises a first connecting part and a second connecting part, wherein the first connecting part and the second connecting part are connected through a connecting rod;
the connecting rod is provided with a measuring section, a force measuring sensor is attached to the outer surface of the measuring section, and protective layers are further coated on the periphery of the force measuring sensor and the measuring section;
the periphery of the measuring section is also provided with a shell, and two ends of the shell are respectively connected with the first connecting part and the second connecting part in a sealing way;
the shell is provided with an antenna, and the antenna is in signal connection with the force transducer; the antenna is used for receiving the measuring signal of the force measuring sensor and sending the measuring signal to the remote data receiving device.
Further, the diameter of the measuring section is smaller than the diameter of the connecting rod.
Further, the shell is fixedly connected with the first connecting portion, or the shell is fixedly connected with the second connecting portion.
Further, the housing includes a front cover and a rear cover;
the connection surface of the front cover and the rear cover is provided with a convex part, and the rear cover is provided with a concave part corresponding to the convex part.
Further, an accommodating cavity is formed between the shell and the connecting rod, and a battery is installed in the accommodating cavity.
Further, all seted up the through-hole on first connecting portion and the second connecting portion.
Further, the force measuring sensor comprises a resistance strain gauge, and the resistance strain gauge is attached to and arranged on the outer surface of the measuring section.
The utility model discloses an another kind technical scheme: a measuring system based on a load cell comprises the measuring device based on the load cell.
Furthermore, the device also comprises a tilt angle sensor, a far-end data receiving device and an operation end alarm display.
The utility model has the advantages that: the utility model discloses a lifting device and waiting to load and unload goods are connected respectively to two connecting portion again to connect two connecting portions through the connecting rod, and install force cell on connecting portion, like this, can be when the hoist and mount goods the atress condition of real-time detection lifting device (especially hoist and mount arm etc.), avoid the too big emergence accident of lifting device atress, unexpected risk when reducing large-scale goods loading and unloading.
Drawings
Fig. 1 is a schematic structural diagram of a measuring device in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of the measuring device according to the embodiment of the present invention when the antenna is not installed;
fig. 3 is a schematic structural view of the measuring device according to the embodiment of the present invention when the casing is not installed;
fig. 4 is a schematic structural view of another view angle when the housing is not installed in the embodiment of the present invention;
FIG. 5 is a schematic diagram of the mechanism of the rear cover in the embodiment of the present invention;
fig. 6 is a schematic structural view of an outer shell in an embodiment of the present invention;
FIG. 7 is a schematic block diagram of a load cell in an embodiment of the present invention;
fig. 8 is a schematic structural diagram of a measurement system based on a load cell according to an embodiment of the present invention.
Wherein: 10. a first connection portion;
20. a second connecting portion;
30. a housing; 31. a front cover; 32. a rear cover;
40. an antenna;
50. a connecting rod; 51. a measuring section;
60. a battery;
100. a measuring device; 200. a tilt sensor; 300. a remote data receiving device; 400. and an operation end alarm display.
Detailed Description
The present invention will be described in detail with reference to the accompanying drawings and specific embodiments.
The embodiment of the utility model discloses a measuring device based on a force transducer, as shown in figure 1 and figure 2, comprises a first connecting part 10 and a second connecting part 20, wherein the first connecting part 10 and the second connecting part 20 are connected through a connecting rod 50; the connecting rod 50 is provided with a measuring section 51, a force measuring sensor is attached to the outer surface of the measuring section 51, and protective layers are coated on the periphery of the force measuring sensor and the measuring section 51; the periphery of the measuring section 51 is also provided with a shell 30, and two ends of the shell 30 are respectively connected with the first connecting part 10 and the second connecting part 20 in a sealing manner; an antenna 40 is arranged on the shell 30, and the antenna 40 is in signal connection with the force measuring sensor; the antenna 40 is used for receiving the measurement signal of the load cell and sending the measurement signal to the remote data receiving device.
The utility model discloses a lifting device and waiting to load and unload goods are connected respectively to two connecting portion again to connect two connecting portions through the connecting rod, and install force cell on connecting portion, like this, can be when the hoist and mount goods the atress condition of real-time detection lifting device (especially hoist and mount arm etc.), avoid the too big emergence accident of lifting device atress, unexpected risk when reducing large-scale goods loading and unloading. Finally, the measurement signal is transmitted to the remote data receiving device through the antenna 40, so that real-time monitoring is realized.
In the present embodiment, as shown in fig. 3 and 4, the connecting rod 50 is a round rod, and the diameter of the measuring section 51 is smaller than that of the connecting rod 50. The load cell includes a resistance strain gauge attached to the outer surface of the measurement section 51. Thus, in use of the device, the measurement section 51 will produce a deformation quantity which will be picked up by the resistance strain gauge.
More specifically, as shown in fig. 7, the load cell is a wireless load cell, and is composed of a resistance strain gauge, an a/D conversion circuit, a single chip, a 2.4GHz wireless communication circuit, an OLED display screen, an alarm circuit, a power circuit, a lithium battery, a key, a housing, and the like.
The measuring section 51, the resistance strain gauge, the housing and other accessories form a resistance strain type force measuring sensor. During measurement, in a load test circuit in which the measuring section 51 passes through the connection holes at both ends, the elastic deformation region corresponding to the measuring section 51 generates corresponding tensile deformation along with the change of the load, and the resistance value of the resistance strain gauge attached to the deformation region changes along with the mechanical deformation. And the plurality of resistance strain gauges and the compensation element form a Wheatstone bridge, and output micro-voltage signals corresponding to the force values.
The micro-voltage signal output by the sensor is converted into a digital signal by an A/D conversion circuit, is sent to an OLED screen for display after being subjected to calibration operation by a singlechip, is subjected to wireless communication by a wireless communication circuit, and is subjected to alarm comparison operation according to set alarm data.
More specifically, the power supply circuit comprises 7.4V rechargeable lithium battery, a switch, a voltage stabilizing circuit and other components. The power supply circuit provides 5V and 3.3V direct current for the sensor and the data acquisition and transmission circuitA power source. OLED display screen pass I 2 The C bus is controlled by the single chip microcomputer to complete data display of measured values, alarm states, battery electric quantity, parameter names, parameter values and the like. The wireless communication module receives the data reading instruction, the parameter setting instruction, the operation control instruction and the like and returns the measured data, the alarm data and the alarm state under the control of the single chip microcomputer through the SPI. The sound-light alarm circuit consists of a buzzer and a red-green double-color light-emitting diode, and completes alarm state indication under the control of a single chip microcomputer. The four keys are respectively connected with the PD 4-PD 7 ports of the single chip microcomputer to complete control operations such as on-off control, zero setting, unit switching, parameter setting and the like. The A/D conversion circuit consists of a 24-bit A/D conversion chip and a peripheral voltage-stabilizing and filtering circuit, is communicated with the singlechip in a serial communication mode, converts the analog signal of the sensor into a digital signal under the control of the singlechip, and provides an excitation power supply for the sensor. The single chip Microcomputer (MCU) is provided with an operation clock by an 11.0592MHz crystal oscillator, an SPI interface of the single chip Microcomputer (MCU) is connected with a wireless communication module, an I2C interface of the single chip microcomputer is connected with an OLED display screen, an ADC7 port is used for collecting the electric quantity of a battery, PC2 and PC3 ports are connected with an A/D conversion chip, a PD3 port is used for self-locking of a power supply, and other I/O ports are respectively used for key detection, alarm indication and the like. And the functions of sensor data and battery power acquisition, calibration operation, display, wireless communication, alarm comparison and the like are completed under the control of a program.
Specifically, the connecting rod 50 and the measuring section 51 are made of 7A04 type high-strength aluminum alloy, the yield strength is more than 400MPa, and the surface is subjected to yellow oxidation treatment. When the rated range is measured, the maximum stress of the elastic deformation zone is about 160MPa, and the safety factor is more than 2 times. BF350-3AA23 type resistance strain gauge is selected, the resistance value is 350 ohm, the sensitivity coefficient is 2.1 +/-0.1, the linear expansion coefficient is 23 multiplied by 10 < -6 > and the fatigue life is 107 times.
The method comprises the steps of selecting an HX711 type 24-bit A/D conversion chip of the sea-chip science and technology company, packaging the chip with the working voltage of 2.6-5.5V and SOP-16, communicating with a single chip microcomputer through a two-wire serial bus, integrating a 128-time programmable amplifier in a chip, supplying power to an external sensor and an A/D converter in the chip by an on-chip voltage stabilizing circuit, and integrating a reset circuit, a clock circuit and 50Hz and 60Hz power interference suppression circuits. The sampling rate is ten times per second, and the final resolution is one ten thousandth of the rated measuring range.
The singlechip is ATMEGA328P type singlechip of ATMEL company. The single chip has instruction execution speed of 20MIPS, FLASH capacity of 32KB, EEPROM of 1KB, SRAM of 2KB, 10-bit A/D conversion and integrated serial SPI and I 2 C. USART interface, etc. The working voltage is 1.8-5.5V, and the package is TQFP32. The display screen adopts a 1.3-inch monochrome OLED display screen, the resolution ratio is 128 multiplied by 64, chinese and English and graphic display are supported, the working voltage is 3.3-5V, and two lines I are provided 2 C bus communication interface, I with single-chip microcomputer 2 And C, connecting communication ports. The wireless communication circuit selects an NRF24L01 core wireless communication chip of NORDIC company, the communication speed is 2Mbps, the wireless communication circuit works in an ISM frequency band of 2.4 GHz-2.5 GHz, a four-wire ISP communication interface is connected with the SPI and a hardware interrupt port of the singlechip. LM1117-5.0 and LM1117-3.3V voltage-stabilizing chips of TI company are selected to provide 5V and 3.3V voltage for the circuit. A7.4V/2500 mAh lithium battery is selected.
In summary, the performance indexes of the measuring device are as follows: measuring range: 10000Kg; division value: 1Kg; sampling rate: 10 times per second; safety overload: 120% of F.S; displaying: 1.3 inch monochrome OLED screen, resolution 128X 64; pressing a key: 4 keys, which are a switch key, a setting key, a unit switching key and a zero setting key respectively; and (4) alarming: two-point alarm, the alarm value and the alarm mode can be set, the alarm value buzzer buzzes, and the indicator light flickers; communication: 2.4GHz wireless communication, the communication distance is wider than 200 meters; power supply: A7.4V/2500 mAh lithium battery is arranged in the lithium battery, and the lithium battery can continuously work for more than 8 hours after being fully filled.
In one embodiment, the housing 30 is fixedly connected to the first connecting portion 10, or the housing 30 is fixedly connected to the second connecting portion 20. Since the first connecting portion 10 and the second connecting portion 20 are connected to the lifting device and the goods, respectively, the housing 30 can be fixedly connected to only one of them.
Specifically, as shown in fig. 6, the housing 30 includes a front cover 31 and a rear cover 32; the connection surface of the front cover 31 and the rear cover 32 has a convex portion, and the rear cover 32 has a concave portion corresponding to the convex portion. The cross part of the convex part and the concave part is connected through a screw, so that the connection stability between the convex part and the concave part can be improved.
In addition, a receiving cavity is formed between the housing 30 and the connecting rod 50, and a battery 60 is mounted in the receiving cavity. Through the mode, all electrical components can be coated inside the shell, and the electrical components can be protected by combining a sealing connection mode.
In one embodiment, in order to facilitate the connection convenience between the measuring device and the hoisting device and the goods, through holes are formed in the first connecting portion 10 and the second connecting portion 20. And then can realize quick connection by pin shafts and the like.
The utility model also discloses a measurement system based on force cell sensor, measurement system include foretell measuring device 100 based on force cell sensor. In addition, the measuring system may further include a tilt sensor 200, a remote data receiving device 300, and an operator-side alarm display 400.
As a specific implementation, as shown in fig. 8, the measurement system designed for iron tower assembly is composed of 10 sets of measurement devices 100, 1 set of two-axis tilt angle sensors 200, a remote data receiving device 300, 6 sets of operation end alarm displays 400, and other necessary accessories. The measuring device 100 and the tilt angle sensor 200 respectively complete force value and tilt angle detection in the iron tower assembly process, send out alarm prompts according to set alarm data, and complete data transmission with the far-end data receiving device 300 through wireless communication. The remote data receiving device 300 reads and displays the measurement data and the alarm state of each measurement device 100, and sends the measurement data to the operation end alarm display 400, so as to complete the display of the measurement data and the alarm state of 5 designated channels.
Claims (9)
1. A load cell based measuring device, comprising a first connection portion (10) and a second connection portion (20), said first connection portion (10) and second connection portion (20) being connected by a connecting rod (50);
the connecting rod (50) is provided with a measuring section (51), a force measuring sensor is attached to the outer surface of the measuring section (51), and protective layers are coated on the periphery of the force measuring sensor and the measuring section (51);
the periphery of the measuring section (51) is also provided with a shell (30), and two ends of the shell (30) are respectively connected with the first connecting part (10) and the second connecting part (20) in a sealing manner;
an antenna (40) is arranged on the shell (30), and the antenna (40) is in signal connection with the force measuring sensor; the antenna (40) is used for receiving the measuring signal of the load cell and sending the measuring signal to a remote data receiving device.
2. A load cell based measuring device according to claim 1, wherein the diameter of the measuring section (51) is smaller than the diameter of the connecting rod (50).
3. A load cell based measuring device according to claim 2, wherein said housing (30) is fixedly connected to said first connecting portion (10) or said housing (30) is fixedly connected to said second connecting portion (20).
4. A load cell based measuring device according to claim 3, wherein said housing (30) comprises a front cover (31) and a rear cover (32);
the connection surface of the front cover (31) and the rear cover (32) is provided with a convex part, and the rear cover (32) is provided with a concave part corresponding to the convex part.
5. A load cell based measuring device according to claim 3 or 4, wherein a receiving cavity is provided between said housing (30) and said connecting rod (50), said receiving cavity being provided with a battery (60).
6. The load cell-based measuring device according to claim 5, wherein the first connecting portion (10) and the second connecting portion (20) are provided with through holes.
7. A load cell based measuring device according to claim 6, wherein said load cell comprises a resistance strain gauge, said resistance strain gauge being attachedly mounted on an outer surface of said measuring section (51).
8. A load cell based measuring system, characterized in that it comprises a load cell based measuring device according to any of claims 1-7.
9. The load cell-based measurement system of claim 8, further comprising a tilt sensor, a remote data receiving device, and an operator alarm display.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222545783.4U CN218145455U (en) | 2022-09-26 | 2022-09-26 | Measuring device and measuring system based on force cell |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202222545783.4U CN218145455U (en) | 2022-09-26 | 2022-09-26 | Measuring device and measuring system based on force cell |
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| Publication Number | Publication Date |
|---|---|
| CN218145455U true CN218145455U (en) | 2022-12-27 |
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| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202222545783.4U Active CN218145455U (en) | 2022-09-26 | 2022-09-26 | Measuring device and measuring system based on force cell |
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| Country | Link |
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| CN (1) | CN218145455U (en) |
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- 2022-09-26 CN CN202222545783.4U patent/CN218145455U/en active Active
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