CN-224216037-U - Dynamic resistance strain signal acquisition device

Abstract

The utility model discloses a dynamic resistance strain signal acquisition device which comprises a detection seat, wherein two ends of the detection seat are respectively provided with a mounting part, a detection arm is arranged between the two mounting parts, a detection hole is arranged between the detection arms, 4 resistance strain pieces are uniformly arranged in the detection hole, an object placing groove is formed in the side face of one mounting part, a signal conditioning control board is arranged in the object placing groove, and the signal conditioning control board is electrically connected with the resistance strain pieces. The full-bridge resistance strain gauge and the signal conditioning control board are integrated together, the acquired strain signal can be directly amplified and converted into a digital signal, and the digital signal is directly output in 485 form, so that the data acquisition process is further simplified, the connection and the data interaction with other equipment are facilitated, the data acquisition efficiency and flexibility are improved, and the bridge monitoring system is more suitable for practical application scenes such as bridge monitoring.

Inventors

• WANG SEN
• SHEN BINJIE
• Bao Enzhao

Assignees

• 浙江博远电子科技有限公司

Dates

Publication Date

20260508

Application Date

20250715

Claims (7)

1. 1. A dynamic resistance strain signal acquisition device is characterized by comprising a detection seat, wherein two ends of the detection seat are respectively provided with a mounting part, a detection arm is arranged between the two mounting parts, a detection hole is arranged between the two mounting parts, 4 resistance strain pieces are uniformly arranged in the detection hole, an object placing groove is formed in one side surface of the mounting part, a signal conditioning control board is arranged in the object placing groove, and the signal conditioning control board is electrically connected with the resistance strain pieces.
2. 2. The device for collecting dynamic resistance strain signals according to claim 1, wherein a packing sealing layer is arranged on the outer side of the detecting arm, a metal cover plate is arranged above the storage groove, and the metal cover plate and the storage groove opening are fixed through glue packaging.
3. 3. The dynamic resistance strain signal acquisition device of claim 1, wherein the signal conditioning control board is provided with a signal amplifying circuit and an analog-to-digital conversion circuit, and a signal output end of the signal conditioning control board is connected with an RS485 bus.
4. 4. The device for acquiring dynamic resistance strain signals according to claim 1, wherein the detecting hole in the middle of the detecting arm is of a circular structure, a first resistance strain gauge, a second resistance strain gauge, a third resistance strain gauge and a fourth resistance strain gauge are respectively arranged on the upper side, the lower side, the left side and the right side of the detecting hole, and the first resistance strain gauge, the second resistance strain gauge, the third resistance strain gauge and the fourth resistance strain gauge form a Wheatstone bridge.
5. 5. The device for collecting dynamic resistance strain signals according to claim 4, wherein the left detecting end and the right detecting end of the detecting arm are respectively connected with two mounting parts, and semicircular notches are arranged on the upper side and the lower side of the left detecting end and the right detecting end.
6. 6. The device for collecting dynamic resistance strain signals according to claim 1, wherein the two sides of the storage tank are provided with threading holes which penetrate through, and one side of the threading holes is communicated with the storage tank and the detection arm.
7. 7. The device for collecting dynamic resistance strain signals according to claim 1, wherein a through assembly hole is formed in the middle of the mounting portion, and an adhesive portion is further arranged on the top surface of the mounting portion.

Description

Dynamic resistance strain signal acquisition device Technical Field The utility model relates to the technical field of resistance strain monitoring, in particular to a dynamic resistance strain signal acquisition device. Background Currently, dynamic resistance strain gauges applied to bridge monitoring in the market mostly output in the form of analog signals (such as voltage and current). In general, the strain of a bridge structure is usually an extremely tiny amount, and when the data is acquired at the rear end, the amplitude of an analog signal is often low and is easily disturbed due to the characteristics of the analog signal, so that the analog signal cannot be effectively identified and processed by acquisition equipment. Therefore, a special signal conditioning amplifier must be provided to amplify, filter, and the like the analog signal. However, the signal conditioning amplifier needs to be purchased additionally, so that project cost is increased, and meanwhile, the signal conditioning amplifier needs to be debugged and installed again, so that technical difficulty in the construction process is increased. Disclosure of utility model In order to solve the problems, the utility model provides a dynamic resistance strain signal acquisition device which integrates the functions of strain signal acquisition, conditioning and amplifying, and the monitoring data is output through a digital mode, so that the project cost is reduced. The dynamic resistance strain signal acquisition device comprises a detection seat, wherein two ends of the detection seat are respectively provided with a mounting part, a detection arm is arranged between the two mounting parts, a detection hole is formed in the middle of the detection arm, 4 resistance strain gauges are uniformly arranged in the detection hole, a storage groove is formed in the side face of one side of the mounting part, a signal conditioning control board is arranged in the storage groove, and the signal conditioning control board is electrically connected with the resistance strain gauges. On the basis of the scheme and as a preferable scheme of the scheme, a wrapped sealing adhesive layer is arranged on the outer side of the detection arm, a metal cover plate is arranged above the storage groove, and the metal cover plate and the storage groove opening are fixed through glue encapsulation. On the basis of the scheme and as a preferable scheme of the scheme, a signal amplifying circuit and an analog-to-digital conversion circuit are arranged on the signal conditioning control board, and a signal output end of the signal conditioning control board is connected with an RS485 bus. On the basis of the scheme, the detection hole in the middle of the detection arm is of a circular structure, a first resistance strain gauge, a second resistance strain gauge, a third resistance strain gauge and a fourth resistance strain gauge are respectively arranged on the upper side, the lower side, the left side and the right side of the detection hole, and the first resistance strain gauge, the second resistance strain gauge, the third resistance strain gauge and the fourth resistance strain gauge form a Wheatstone bridge. On the basis of the scheme and as a preferable scheme of the scheme, a left detection end and a right detection end of the detection arm are respectively connected with two mounting parts, and semicircular notches are formed in the upper side and the lower side of the left detection end and the right detection end. On the basis of the scheme and as a preferable scheme of the scheme, through threading holes are formed in two sides of the storage groove, and one side of the through threading holes are communicated with the storage groove and the detection arm. On the basis of the scheme, the adhesive tape is used as a preferable scheme of the scheme, wherein a penetrating assembly hole is formed in the middle of the mounting part, and the top surface of the mounting part is also provided with an adhesive part. Compared with the prior art, the utility model has the beneficial effects that: The full-bridge resistance strain gauge and the signal conditioning control board are integrated together, the acquired strain signals can be directly amplified and converted into digital signals, and the digital signals are directly output in 485 form, so that additional equipment is not required to be connected to process and transmit the signals, the data acquisition flow is further simplified, connection and data interaction with other equipment are facilitated, the data acquisition efficiency and flexibility are improved, and the bridge monitoring system is more suitable for practical application scenes such as bridge monitoring. The Wheatstone bridge is formed by the first, second, third and fourth resistance strain gages, so that the extremely tiny strain quantity of the bridge structure can be detected more accurately, a reliable data base is provided for bri