CN211085090U

CN211085090U - Magnetic grid digital display caliper

Info

Publication number: CN211085090U
Application number: CN201921277010.4U
Authority: CN
Inventors: 陈波; 刘振宏; 吕耀坤
Original assignee: Tsun Electronic Shenzhen Co ltd
Current assignee: Tsun Electronic Shenzhen Co ltd
Priority date: 2019-08-05
Filing date: 2019-08-05
Publication date: 2020-07-24
Anticipated expiration: 2029-08-05

Abstract

The utility model discloses a magnetic grid digital display caliper, including aluminium alloy magnetic grid measuring caliper and wireless receiving module, aluminium alloy magnetic grid measuring caliper is by deciding pawl fixed block, aluminium alloy guide rail, slider, magnetic stripe briquetting, locking handle, decide the jack catch, move the jack catch fixed plate, long table box backup pad, short table box backup pad, table box panel, magnetic grid digital display table, magnetic grid sensor, plastic handle, antenna and end-capping block and constitute, the beneficial effects of the utility model are that 1: the precision measurement of magnetic grid chi, repeated measurement precision + -0.01mm, highest resolution 0.01mm, 2: have relative, two absolute measuring mode, 3: adopt 2 No. 5 batteries to supply power, 4: high contrast L CD, large character display mode, 5: a key wireless transmission measured value function, the maximum distance can reach 200 meters, 6: receive can pass through RS485, RS232, USB's communication mode and computer or P L C transmission.

Description

Magnetic grid digital display caliper

Technical Field

The utility model relates to a slide caliper rule specifically is a magnetic grid digital display slide caliper rule.

Background

The magnetic displacement controller is a device for measuring and controlling the length by the displacement distance of the Hall sensor, is a non-contact measurement control technology, and has the advantages of non-contact measurement, high pollution resistance, dust resistance, abrasion resistance, impact resistance, vibration resistance, magnetic field interference resistance and extremely long service life, and is suitable for working in industrial environments such as water, oil, dust and the like, thereby being widely applied to the fields of metal processing equipment, building material machinery, woodworking machinery and the like.

The vernier caliper in the current market has short measuring range, the long-measuring-range vernier caliper has higher unit price ratio, the precision of the tape measure is poorer, and the measurement and the data recording are inconvenient.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a magnetic grid digital display slide caliper to solve the problem of proposing among the above-mentioned background art.

In order to achieve the above object, the utility model provides a following technical scheme:

a magnetic grid digital display caliper comprises an aluminum profile magnetic grid measuring caliper and a wireless receiving module, wherein the aluminum profile magnetic grid measuring caliper is wirelessly connected with the wireless receiving module, the aluminum profile magnetic grid measuring caliper is composed of a fixed jaw fixing block, an aluminum profile guide rail, a sliding block, a magnetic stripe pressing block, a locking handle, a fixed jaw, a movable jaw fixing plate, a long meter box supporting plate, a short meter box supporting plate, a meter box panel, a magnetic grid digital display meter, a magnetic grid sensor, a plastic handle, an antenna I and a sealing end block, the fixed jaw is locked on the fixed jaw fixing block, the fixed jaw fixing block is fixed at the starting end of the aluminum profile guide rail through screws, the magnetic stripe is directly pasted on the aluminum profile guide rail and is tightly pressed by the magnetic stripe pressing block, the movable jaw fixing plate, the long meter box supporting plate and the short meter box supporting plate are all fixed on the four sliding blocks through screws, the magnetic grid sensor is fixed on a long meter box supporting plate through screws, the meter box is fixed on the long meter box supporting plate and a short meter box supporting plate through screws, a meter box panel is fixed on the long meter box supporting plate and the short meter box supporting plate through copper columns, the magnetic grid digital display meter is fixed on the meter box panel, an antenna I and a plastic handle are fixed on the side face of the meter box, a locking handle is fixed on the long meter box supporting plate, a sealing block is fixed at the tail end of an aluminum profile guide rail through screws, a wireless receiving module comprises an elastic assembly buckle, an aluminum shell, an integrated PCB and an antenna II, the elastic assembly buckle is fixed on an aluminum shell upper cover through copper columns and screws, the integrated PCB is placed on the copper columns and locked through screws, then an aluminum shell lower cover and the aluminum shell upper cover are aligned and clamped, aluminum shell side plates are placed at two ends of the aluminum shell upper cover and the aluminum shell upper cover, and the antenna II is fixed on the aluminum, the small film is stuck on the lower cover of the aluminum shell.

As a further technical solution of the present invention: a signal transmitting part is arranged in the magnetic grid measuring caliper, and a signal receiving part is arranged in the integrated PCB; the signal transmitting part comprises a transmitting end control IC, an HTN code breaking screen, an operational amplifier, a Hall sensor length shaft and a 433M wireless transmitting module, the Hall sensor length shaft is connected with the operational amplifier, the control IC is respectively connected with the HTN code breaking screen, the operational amplifier and the 433M wireless transmitting module, the signal receiving part comprises a receiving end control IC, a nixie tube, the 433M wireless receiving module and an interface module, the receiving end control IC is respectively connected with the nixie tube, the 433M wireless receiving module and the interface module, and the 433M wireless transmitting module is in wireless connection with the 433M wireless receiving module.

As a further technical solution of the present invention: the signal transmitting part also comprises a DC-DC power supply management module, and the DC-DC power supply management module is respectively connected with the wireless transmitting module and the operational amplifier.

As a further technical solution of the present invention: the signal receiving part also comprises a DC-DC power supply management module, and the DC-DC power supply management module is respectively connected with the interface module and the wireless receiving module.

As a further technical solution of the present invention: the interface module comprises an RS485 interface, an RS232 interface and a USB interface.

As a further technical solution of the present invention: the type of the transmitting terminal control IC is MSP430F 449.

As a further technical solution of the present invention: the type of the receiving end control IC is STM3232F 103.

Compared with the prior art, the utility model has the advantages that 1, the precision measurement of the magnetic scale, the repeated measurement precision is + -0.01mm, the highest resolution is 0.01mm, 2, the two measurement modes of relative and absolute type are provided, 3, 2, No. 5 batteries are adopted for supplying power, 4, the high contrast ratio is L CD, the high definition display mode of large characters is provided, 5, the function of one-key wireless transmission measurement value is provided (optional), the maximum distance can reach 500 meters, and 6, the receiving can be transmitted with a computer or a P L C through the RS485 and RS232 communication modes of USB.

Drawings

Fig. 1 is an overall schematic diagram of a signal transmitting portion.

Fig. 2 is an overall schematic diagram of the signal receiving section.

Fig. 3 is a circuit diagram of a hall sensor/length axis.

Fig. 4 is a circuit diagram of an operational amplifier.

Fig. 5 is a structural diagram of the aluminum profile magnetic grid measuring caliper.

Fig. 6 is a block diagram of a wireless receiving module.

In fig. 5: the device comprises a fixed jaw fixing block 1, a fixed jaw 2, an aluminum profile guide rail 3, a magnetic strip pressing block 4, a magnetic strip 5, a movable jaw fixing plate 6, a movable jaw 7, a sliding block 8, a plastic handle 9, a short meter box supporting plate 10, a long meter box supporting plate 11, a locking handle 12, an antenna I13, a meter box 14, a meter box panel 15, a magnetic grid digital display meter 16, a sealing end block 17, a screw 18-M5, a screw 19-M4, a screw 20-M6, a copper column 21-M3, a screw 22-M3 and a magnetic grid sensor 23.

In fig. 6: 31-lower cover of aluminum shell, 32-integrated PCB, 33-upper cover of aluminum shell, 34-small face film, 35-second antenna, 36-side plate of aluminum shell, and 37-elastic assembly buckle.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

Example 1: referring to fig. 1-6, a magnetic grid digital display caliper comprises an aluminum profile magnetic grid measuring caliper and a wireless receiving module, wherein the aluminum profile magnetic grid measuring caliper comprises a fixed jaw fixing block 1, an aluminum profile guide rail 3, a sliding block 8, a magnetic strip 5, a magnetic strip pressing block 4, a locking handle 12, a fixed jaw 2, a movable jaw 7, a movable jaw fixing plate 6, a long meter box supporting plate 11, a short meter box supporting plate 10, a meter box 14, a meter box panel 15, a magnetic grid digital display meter 16, a magnetic grid sensor 23, a plastic handle 9, an antenna I13 and a sealing block 17, the fixed jaw 2 is locked on the fixed jaw fixing block 1, the fixed jaw fixing block 1 is fixed on the starting end of the aluminum profile guide rail 3 through screws, the magnetic strip 5 is directly adhered to the aluminum profile guide rail 3 and pressed by the magnetic strip pressing block 4, the movable jaw fixing plate 6, the long meter box supporting plate 11 and the short meter box supporting plate 10 are all fixed on the four sliding blocks 8, the movable claw 7 is locked on the movable claw fixing plate 6, the magnetic grid sensor 23 is fixed on the long meter box supporting plate 11 through screws, the meter box 14 is fixed on the long meter box supporting plate 11 and the short meter box supporting plate 10 through screws, the meter box 14 panel is fixed on the long meter box supporting plate 11 and the short meter box supporting plate 10 through 4 copper columns, the magnetic grid digital display meter 16 is fixed on the meter box panel 15, the antenna I13 and the plastic handle 9 are fixed on the side surface of the meter box 14, the locking handle 12 is fixed on the long meter box supporting plate 11, the end-capping block 17 is fixed at the tail end of the aluminum profile guide rail 3 through screws, 4 sliding blocks slide on the guide rail to drive the magnetic grid sensor to move, thereby achieving the purpose of measurement, the wireless receiving module is composed of an elastic assembly buckle 37, an aluminum shell, an integrated PCB 32 and an antenna II 35, the elastic assembly buckle 37 is fixed on the aluminum shell upper cover 31 through, the integrated PCB 32 is placed on the copper column and is locked by screws, then the lower cover 31 of the aluminum shell is aligned and clamped with the upper cover 33 of the aluminum shell, side plates 36 of the aluminum shell are placed at two ends of the upper cover 31 of the aluminum shell and the upper cover 33 of the aluminum shell, the second antenna 35 is fixed on the side plate 36 of the aluminum shell at one end, and the small face film 34 is attached to the lower cover 31 of the aluminum shell. This novel accurate measurement of long stroke can be realized, the stroke is nearly 2000mm, precision 0.05mm to but remote wireless transmission data receiving, the distance can reach 100 meters.

Wherein, the magnetic grid measuring caliper is internally provided with a signal transmitting part, and the integrated PCB 32 is internally provided with a signal receiving part; the signal transmitting part comprises a transmitting end control IC, an HTN code breaking screen, an operational amplifier, a Hall sensor length shaft and a 433M wireless transmitting module, the Hall sensor length shaft is connected with the operational amplifier, the control IC is respectively connected with the HTN code breaking screen, the operational amplifier and the 433M wireless transmitting module, the signal receiving part comprises a receiving end control IC, a nixie tube, the 433M wireless receiving module and an interface module, the receiving end control IC is respectively connected with the nixie tube, the 433M wireless receiving module and the interface module, and the 433M wireless transmitting module is in wireless connection with the 433M wireless receiving module.

In the hall effect principle, the hall voltage changes with the change of the magnetic field strength, the stronger the magnetic field, the higher the voltage, the weaker the magnetic field, the lower the voltage, the small hall voltage value, usually only a few millivolts, but the voltage can be amplified to be enough to output a stronger signal by the amplifier in the integrated circuit. If the Hall IC is used for sensing, the magnetic induction intensity needs to be changed mechanically. The magnetic grid ruler (magnetic spacing 5m) is adopted in the design (the base ruler is a uniformly magnetized steel strip, S and N poles are uniformly arranged on the steel strip at intervals), the Hall sensor is arranged on the magnetic grid ruler, and when the sensor is positioned in an air gap between the magnetic grid and the Hall integrated circuit, the sensor is moved, the magnetic field deviates from the integrated chip, and the change of the output voltage of the Hall integrated circuit can indicate that the sensor is positioned at a certain position of the magnetic grid.

The high and low voltage of the sensor is generated: the circuit diagram is shown in fig. 3, and the head voltage is maintained at 0.03V. The operational amplifier follower is adopted to ensure that the voltage on the sensor is constant and is not influenced by the resistance change of the magnetic head. The hall sensor is supplied with voltage from a 1.5V battery using a field effect transistor.

Because the magnetic field intensity of the magnetic grid ruler is weak, the differential signal output by the Hall sensor is also a very weak electric signal, the signal needs to adopt an instrument amplifier, the instrument amplifier is a precise differential voltage amplifier and has a differential input and a closed loop gain component with a relative reference end single-end output, key elements are integrated in the amplifier by the instrument amplifier, and the unique structure of the instrument amplifier ensures that the instrument amplifier has the characteristics of high common-mode rejection ratio, high input impedance, low noise, low linear error, low offset drift gain, flexible setting, convenient use and the like, so that the instrument amplifier is favored in the aspects of data acquisition, sensor signal amplification, high-speed signal regulation, medical instruments, high-grade acoustic equipment and the like. The signal amplifier is shown in fig. 4.

The signal transmitting part also comprises a DC-DC power supply management module, and the DC-DC power supply management module is respectively connected with the wireless transmitting module and the operational amplifier. The signal receiving part also comprises a DC-DC power supply management module which is respectively connected with the interface module and the wireless receiving module. The interface module comprises an RS485 interface, an RS232 interface and a USB interface, the voltage of the battery is 1.5V and is boosted to 2.7V through an AS1323, the voltage is supplied to the MCU and the operational amplifier, and in order to save electricity, the wireless transmitting function is started when data is to be transmitted; when no measurement requirement exists, the machine is automatically turned off and is in a power-saving mode.

HTN code break screen: the HTN (high twisted nematic) nematic liquid crystal molecules are sandwiched between two transparent glasses, and the orientation of the liquid crystal molecules is deflected by 110-130 degrees between the two glasses. The lcd of this type has the characteristics of high contrast, low power consumption, low driving voltage, wide viewing angle and the like, and 2-row 7-bit digital display.

Description of the principle of a receiving circuit of the magnetic grid digital caliper: 433MHz, 10mW high stability, diffraction and through-the-wall ability reinforce, the data transmission module of receiving and dispatching an organic whole, from taking FEC and interweaving the code, the interference killing feature is strong, the spectral characteristic is good, the harmonic is little, characteristics such as channel crosstalk are little set up ID number one to avoid the crosstalk of channel, it is SPI communication transmission with MCU. External antenna, transmission distance can reach 500 meters distance, microprocessor (STM32F 103): the USB interface is mainly communicated with each equipment interface, the USB is connected with a computer, which is equivalent to the keyboard input of the computer, and received data can be directly displayed in a computer display screen. RS232 and RS485 serial ports are communicated, the Baud rates are set to be consistent, and data are transmitted with industrial equipment.

Embodiment 2, on the basis of embodiment 1, the transmitting-end control IC employs an ultra-low power consumption microcontroller MSP430F449, which is an optimal choice for prolonging the battery life in portable measurement applications, and employs an uninterrupted scanning mode to sample the sensor signal, calculate the AD value, calibrate the midpoint voltage in the signal amplifier and the progress of the sensor in an intelligent verification mode, start transmitting data by one key, turn off the power supply of the transmitted signal when no signal is transmitted, and return to a power saving mode, and the wireless data transmission employs an open 433MHz, 10mW high stability, strong diffraction and wall penetration capability, a transceiving integrated data transmission module, and features strong self-contained FEC and interleaved coding, strong anti-interference capability, good spectral characteristics, small harmonic, small channel crosstalk, and the like.

It is obvious to a person skilled in the art that the invention is not restricted to details of the above-described exemplary embodiments, but that it can be implemented in other specific forms without departing from the spirit or essential characteristics of the invention. The present embodiments are therefore to be considered in all respects as illustrative and not restrictive, the scope of the invention being indicated by the appended claims rather than by the foregoing description, and all changes which come within the meaning and range of equivalency of the claims are therefore intended to be embraced therein. Any reference sign in a claim should not be construed as limiting the claim concerned.

Furthermore, it should be understood that although the present description refers to embodiments, not every embodiment may contain only a single embodiment, and such description is for clarity only, and those skilled in the art should integrate the description, and the embodiments may be combined as appropriate to form other embodiments understood by those skilled in the art.

Claims

1. A magnetic grid digital caliper comprises an aluminum profile magnetic grid measuring caliper and a wireless receiving module, wherein the aluminum profile magnetic grid measuring caliper is in wireless connection with the wireless receiving module, and is characterized in that the aluminum profile magnetic grid measuring caliper comprises a fixed clamping jaw fixing block (1), an aluminum profile guide rail (3), a sliding block (8), a magnetic stripe (5), a magnetic stripe pressing block (4), a locking handle (12), a fixed clamping jaw (2), a movable clamping jaw (7), a movable clamping jaw fixing plate (6), a long meter box supporting plate (11), a short meter box supporting plate (10), a meter box (14), a meter box panel (15), a magnetic grid digital display meter (16), a magnetic grid sensor (23), a plastic handle (9), an antenna I (13) and a blocking block (17), the fixed clamping jaw (2) is locked on the fixed clamping jaw fixing block (1), the fixed clamping jaw fixing block (1) is fixed at the starting end of the aluminum profile guide rail (3) through screws, the magnetic strip (5) is directly adhered to the aluminum profile guide rail (3) and is pressed by the magnetic strip pressing block (4), the movable clamping claw fixing plate (6), the long meter box supporting plate (11) and the short meter box supporting plate (10) are all fixed on the four sliding blocks (8) through screws, the movable clamping claw (7) is locked on the movable clamping claw fixing plate (6), the magnetic grid sensor (23) is fixed on the long meter box supporting plate (11) through screws, the meter box (14) is fixed on the long meter box supporting plate (11) and the short meter box supporting plate (10) through screws, the meter box (14) panel is fixed on the long meter box supporting plate (11) and the short meter box supporting plate (10) through (4) copper columns, the magnetic grid digital display meter (16) is fixed on the meter box panel (15), the antenna I (13) and the plastic handle (9) are fixed on the side face of the meter box (14), and the locking handle (12) is fixed on the long meter box supporting plate (11), the sealing end block (17) is fixed at the tail end of the aluminum profile guide rail (3) through screws, the wireless receiving module is composed of an elastic assembly buckle (37), an aluminum shell, an integrated PCB (printed circuit board) (32) and a second antenna (35), the elastic assembly buckle (37) is fixed on the lower cover (31) of the aluminum shell through a copper column and screws, the integrated PCB (32) is placed on the copper column and locked through the screws, then the lower cover (31) of the aluminum shell and the upper cover (33) of the aluminum shell are aligned and clamped, the side plates (36) of the aluminum shell are placed at two ends of the lower cover (31) of the aluminum shell and the upper cover (33) of the aluminum shell, the second antenna (35) is fixed on the side plate (36) of the aluminum shell at one end, and the small surface film (34) is attached to the lower cover (.

2. The magnetic grid digital caliper is characterized in that a signal transmitting part is arranged inside the magnetic grid measuring caliper, and a signal receiving part is arranged inside an integrated PCB (32); the signal transmitting part comprises a transmitting end control IC, an HTN code breaking screen, an operational amplifier, a Hall sensor length shaft and a 433M wireless transmitting module, the Hall sensor length shaft is connected with the operational amplifier, the control IC is respectively connected with the HTN code breaking screen, the operational amplifier and the 433M wireless transmitting module, the signal receiving part comprises a receiving end control IC, a nixie tube, the 433M wireless receiving module and an interface module, the receiving end control IC is respectively connected with the nixie tube, the 433M wireless receiving module and the interface module, and the 433M wireless transmitting module is in wireless connection with the 433M wireless receiving module.

3. The magnetic grid digital caliper according to claim 2, wherein the signal transmitting part further comprises a DC-DC power management module, and the DC-DC power management module is respectively connected with the wireless transmitting module and the operational amplifier.

4. The magnetic grid digital caliper according to claim 2, wherein the signal receiving part further comprises a DC-DC power management module, and the DC-DC power management module is respectively connected with the interface module and the wireless receiving module.

5. The magnetic grid digital caliper according to claim 2, wherein the interface module comprises an RS485 interface, an RS232 interface and a USB interface.

6. The caliper according to claim 2, wherein the transmitter control IC is model MSP430F 449.

7. The magnetic grid digital caliper according to any one of claims 2 to 5, wherein the receiving end control IC model is STM3232F 103.