CN201081791Y

CN201081791Y - Wireless weighing sensor

Info

Publication number: CN201081791Y
Application number: CNU200720045802XU
Authority: CN
Inventors: 田峰; 周亮
Original assignee: Mettler Toledo Changzhou Measurement Technology Ltd; Mettler Toledo Changzhou Precision Instruments Ltd; Mettler Toledo Changzhou Weighing Equipment Co Ltd
Current assignee: Mettler Toledo Changzhou Measurement Technology Ltd; Mettler Toledo Changzhou Precision Instruments Ltd; Mettler Toledo Changzhou Weighing Equipment Co Ltd
Priority date: 2007-09-14
Filing date: 2007-09-14
Publication date: 2008-07-02
Anticipated expiration: 2017-09-14

Abstract

The utility model relates to a wireless weighing sensor which comprises an elastic body, a resistance foil gauge fixedly connected with the elastic body, a circuit board provided with a measuring circuit, and an encloser connected with the elastic body, wherein a wireless communication module is also arranged on the elastic body; the output terminal of the measuring circuit is connected with the wireless communication module; the outer side of the elastic body is provided with a joint; an antenna connected with the wireless communication module is arranged on the external part of the elastic body. As weighing data is output through the wireless communication module in a wireless mode, the utility model avoids the cable loss of the prior weighing sensor, reduces construction difficulty, workload and the odds that the weighing sensor is interfered by the outside, improves the performance of the weighing sensor, enlarges the use scope of the weighing sensor, and achieves the application in anti-explosion and other special situations with a more simple design as well.

Description

Wireless LOAD CELLS

Technical field

The utility model relates to a kind of LOAD CELLS, especially relates to a kind of wireless LOAD CELLS that can realize wireless telecommunications.

Background technology

The tradition LOAD CELLS mainly is made of elastic body and resistance strain gage, metering circuit and the joint etc. that are arranged on the elastic body.When elastic body is subjected to external force and produces when distortion, make the also distortion simultaneously of resistance strain gage that sticks on the elastic body, cause the variation of resistance strain gage resistance, by metering circuit weight signal is transformed into the output of corresponding simulating electric signal.But the electric signal of output is to be connected with instrument behind the energising cable thereto again, and treated data show weight by instrument.Because LOAD CELLS must be carried out data communication by wired mode, has not only needed to use materials such as a large amount of cables, terminal box, and also need to spend a large amount of manpower construction wirings when mounted.Simultaneously, because power supply input on long more cable, just has big more energy loss, and during wire communication, the easier absorption of cable is also being launched various interfering energies, causes the instability of weighing system.

Summary of the invention

The purpose of this utility model provides a kind of wireless LOAD CELLS of data by wireless telecommunications output of weighing.

The utility model is that the technical scheme that achieves the above object is: a kind of wireless LOAD CELLS, comprise elastic body, be fixedly connected on resistance strain gage on the elastic body, the circuit board of metering circuit is housed and is connected case on the elastic body, it is characterized in that: wireless communication module also is housed on the described elastic body, the output terminal of metering circuit is connected with wireless communication module, the elastomeric outside has joint, and the antenna that is connected with wireless communication module is installed in elastomeric outside.

The utility model has been installed a wireless communication module on elastic body, and be connected with metering circuit, therefore after the metering circuit on the circuit board is carried out acquisition process to weighing-up wave, can export the data of weighing wirelessly by wireless communication module, avoided the cable loss of traditional LOAD CELLS, difficulty of construction and workload have been reduced, reduced the probability that LOAD CELLS is subjected to external disturbance, improved the performance of LOAD CELLS, also enlarge the usable range of LOAD CELLS, can also simpler design be implemented in the explosion-proof application that waits special occasions.

Description of drawings

Below in conjunction with accompanying drawing embodiment of the present utility model is described in further detail.

Fig. 1 is one of structural representation of the present utility model.

Fig. 2 is the structural representation of the A-A of Fig. 1.

Fig. 3 is two of a structural representation of the present utility model.

Fig. 4 is three of a structural representation of the present utility model.

Fig. 5 is four of a structural representation of the present utility model.

Fig. 6 is a metering circuit and the block diagram that is connected of wireless communication module.

Fig. 7 is an electrical schematic diagram of the present utility model.

Wherein: 1-elastic body, 2-wireless communication module, 3-resistance strain gage, 4-case, 5-blind hole, 6-cable, 7-circuit board, 8-mounting hole, 9-joint, 10-cutting ferrule, 11-charge power supply, 12-antenna.

Embodiment

See the wireless LOAD CELLS of utility model shown in Fig. 1～5, comprise elastic body 1, be fixedly connected on resistance strain gage 3 on the elastic body 1, the circuit board 7 of metering circuit is housed and is connected case 4 on the elastic body 1, the utility model also is equipped with wireless communication module 2 on elastic body 1, the output terminal of metering circuit is connected with wireless communication module 2 by cable 6, the outside of elastic body 1 has joint 9, and the antenna 12 that is connected with wireless communication module 2 is installed in the outside of elastic body 1.See Fig. 6, shown in 7, metering circuit of the present utility model is conventional weighing-up wave treatment circuit, the main resistance bridge that constitutes by resistance strain gage 3, A/D change-over circuit and cpu control circuit constitute, by the resistance bridge changes in resistance, gravimetric value is transformed into measurable simulating signal, analog electrical signal converts digital signal to by the A/D change-over circuit and delivers to the CPU treatment circuit and carry out data processing, data are after treatment launched by antenna 12 by wireless communication module 2, instrument is then by corresponding wireless communication module received signal, realize wireless telecommunications, the utility model provides power supply for giving metering circuit and wireless communication module 2, the joint 9 in elastic body 1 outside is connected with alternating circuit, see shown in Fig. 1～5, perhaps the joint 9 in elastic body 1 outside is equipped with charge power supply 11, one end of charge power supply 11 is connected by cutting ferrule 10 on the joint 9 of elastic body 1, and antenna 12 is installed on the charge power supply 11; Can also be that charge power supply 11 is connected on the joint 9 of elastic body 1 by bolt, antenna 12 be installed on the charge power supply 11.

See shown in Fig. 1～2 it is the wireless LOAD CELLS of a kind of structure of the present utility model, elastic body 1 is a pole structure, resistance strain gage 3 is bonded in elastic body 1 surface, circuit board 7 is fixedly connected on the elastic body 1, wireless communication module 2 is fixedly connected on the circuit board 7, the output terminal of metering circuit is connected with wireless communication module 2, there is case 4 in the outside of elastic body 1, this case is to constitute cylindrical casing by upper encloser and lower encioser, by case wireless communication module 2 is encapsulated on the elastic body 1, antenna 12 is installed on the joint 9 of elastic body 1, and when charge power supply 11 was installed on the

joint

9,12 on antenna was installed on the charge power supply 11.

See that shown in Figure 3 is the wireless LOAD CELLS of the another kind of structure of the utility model, elastic body 1 is for shearing girder structure, elastic body 1 is provided with two symmetries and coaxial blind hole 5, resistance strain gage 3 is bonded in the bottom, hole of two blind holes 5 respectively, wireless communication module 2 then is fixedly connected at the bottom of the hole wall place or hole of any one blind hole 5, the place, aperture of blind hole 5 is fixedly connected with case 4, this case 4 is bowl-type, wireless communication module 2 is encapsulated in the elastic body 1, antenna 12 is installed on the joint 9 of elastic body 1, when charge power supply 11 was installed on the

joint

9,12 on antenna was installed on the charge power supply 11.

See that shown in Figure 4 is the wireless LOAD CELLS of another structure of the utility model, this elastic body 1 is also for shearing girder structure, elastic body 1 is provided with two symmetries and coaxial blind hole 5, resistance strain gage 3 is respectively the bottom, hole that is bonded in two blind holes 5, the place, aperture of blind hole 5 is fixedly connected with case 4, also be provided with mounting hole 8 on the elastic body 1, circuit board 7 is housed in the mounting hole 8, wireless communication module 2 is housed on the circuit board 7, case 4 is fixedly connected on the mouth place of elastic body 1 mounting hole 8, case 4 is tabular, wireless communication module 2 is encapsulated in the elastic body 1, antenna 12 is installed on the joint 9 of elastic body 1, and when charge power supply 11 was installed on the

joint

9,12 on antenna was installed on the charge power supply 11.

See that shown in Figure 5 is the wireless LOAD CELLS of another structure of the utility model, this elastic body 1 is also for shearing girder structure, elastic body 1 is provided with two symmetries and coaxial blind hole 5, resistance strain gage 3 is respectively the bottom, hole that is bonded in two blind holes 5, the place, aperture of blind hole 5 is fixedly connected with case 4, also be provided with mounting hole 8 on the elastic body 1, circuit board 7 is housed in the mounting hole 8, case 4 is fixedly connected on the mouth place of elastic body 1 mounting hole 8, case 4 is tabular, circuit board 7 is encapsulated in the elastic body 1, and wireless communication module 2 is fixedly connected on the outside of elastic body 1, and the end of incoming cables of wireless communication module 2 is installed on the joint 9 and is connected with metering circuit, and antenna 12 is installed on the wireless communication module 2, when needs are installed charge power supply 11, charge power supply 11 can be installed on the joint 9.

Wireless communication module 2 of the present utility model can be in the wireless communication modules such as RF, Zigbee, 802.11, wirelessUSB any, select the LOAD CELLS of different size structure for use according to the different application occasion, and select different wireless communication modules for use according to factors such as communication distance, power supply, dimensional structures.

Claims

1. wireless LOAD CELLS, comprise elastic body (1), be fixedly connected on resistance strain gage (3) on the elastic body (1), the circuit board (7) of metering circuit is housed and is connected case (4) on the elastic body (1), it is characterized in that: wireless communication module (2) also is housed on the described elastic body (1), the output terminal of metering circuit is connected with wireless communication module (2), the outside of elastic body (1) has joint (9), and the antenna (12) that is connected with wireless communication module (2) is installed in the outside of elastic body (1).

2. according to the described wireless LOAD CELLS of claim 1, it is characterized in that: described wireless communication module (2) is installed on the circuit board (7), circuit board (7) and resistance strain gage (3) are bonded on the elastic body (1) of cylindricality, case (4) is coated on the elastic body (1), and antenna (12) is installed on the joint (9) of elastic body (1).

3. according to the described wireless LOAD CELLS of claim 1, it is characterized in that: described wireless communication module (2) is installed in the hole wall or the bottom, hole of (1) two symmetry of elastic body and coaxial any one blind hole (5), case (4) is fixedly connected on the place, aperture of elastic body (1) blind hole, and antenna (12) is installed on the joint (9) of elastic body (1).

4. according to the described wireless LOAD CELLS of claim 1, it is characterized in that: described wireless communication module (2) is installed on the circuit board (7), circuit board (7) is installed in the mounting hole (8) of elastic body (1), case (4) is fixedly connected on the place, mounting hole (8) aperture of elastic body (1), and antenna (12) is installed on the joint (9) of elastic body (1).

5. according to the described wireless LOAD CELLS of claim 1, it is characterized in that: described wireless communication module (2) is fixedly connected on the outside of elastic body (1), the end of incoming cables of wireless communication module (2) is installed in joint (9) and upward is connected with metering circuit, and antenna (12) is installed on the wireless communication module (2).

6. according to the described wireless LOAD CELLS of one of claim 1 to 5, it is characterized in that: described wireless communication module (2) is any for RF, Zigbee, 802.11, wireless USB's.

7. according to the described wireless LOAD CELLS of claim 1, it is characterized in that: charge power supply (11) is installed on the described joint (9), and charge power supply (11) is connected on the joint (9) of elastic body (1) by cutting ferrule (10), and antenna (12) is installed on the charge power supply (11).

8. according to the described wireless LOAD CELLS of claim 1, it is characterized in that: charge power supply (11) is installed on the described joint (9), and charge power supply (11) is connected on the joint (9) of elastic body (1) by bolt, and antenna (12) is installed on the charge power supply (11).