CN201007675Y - Tuning fork level message reporting device - Google Patents

Abstract

The utility model discloses a turning-fork position annunciator, which comprises a fork body, a driver of a frequency-selective amplifier, a signal shaping device and a singlechip. Signals of fork vibration are shaped by the signal shaping device after passing through the driver, then are sent to the singlechip to be digitally processed. The digitally proceeded electric signals and the output frequency signals return to the fork body after passing through the frequency-selective amplifier to maintain the vibration of the fork body. Simultaneously the singlechip commands an action control switch of a relay to open and close according to the vibration signals of the folk body, the output switching-capacity signals, the on-site bus signals and the current signals can realize on-site bus control and remote signals switch control. The utility model has the advantages of high sensibility and reliability, strong functions, which can realizes integral display and control, and the utility model is reasonable in structure, simple in assembly, dependable in operation, low in cost, high in economic profit, convenient in popularization and utilization, which is also adapted for other non-position controls.

Description

A kind of tuning fork thing position signalling generator

Affiliated technical field

The utility model relates to level meter technical field in the instrument and meter industry, particularly relates to a kind of tuning fork thing position signalling generator.

Technical background:

As everyone knows, in the level meter technical field, tuning fork thing position signalling generator is a kind of gauge tap of controlling thing position height in the container, use more extensive, its principle of work is after object height in the container changes, the vibration signal that the fork body of the tuning fork thing position signalling generator of installing on the material container receives also can change, and the vibration signal of signalling generator utilization fork body is transformed into the closure that electric signal comes the gauge tap device, reaches the purpose of thing position height in the control container.The shortcoming of traditional tuning fork thing position signalling generator is that shock resistance is poor, function singleness, too high to the coherence request of fork body self parameter, often misoperation even malfunctioning, its reason mainly is that traditional tuning fork thing position signalling generator adopts mimic channel to judge whether failure of oscillation just can't be guaranteed reliable output to the fork body, amplitude is transferred big to be difficult for failure of oscillation, turned down and be difficult for starting of oscillation, and the more feasible fork body of the vibration of environment is difficult for failure of oscillation.Just amplitude is slightly not different with frequency in the medium at different things to pitch body in addition, it is the process of quantitative change, but the switching value that requires output is the process of a qualitative change, and this all is the problem of the indeterminable solution of traditional tuning fork thing position signalling generator, and its shortcoming also is conspicuous.How overcoming the shortcoming that above-mentioned traditional tuning fork thing position signalling generator occurs, is the task that current urgent need solves in this area.

Summary of the invention:

The purpose of this utility model is to provide a kind of highly sensitive, good reliability, powerful and can realize the intelligentized tuning fork thing of having of centralized displaying and control position signalling generator.

In order to achieve the above object, the utility model adopts the technical scheme of following structure: a kind of tuning fork thing position signalling generator, by the fork body, the device driver is sent out in frequency-selecting big, signal shaper, single-chip microcomputer is formed, be characterized in: enter signal shaper after the vibration signal that the startup of fork body is sent becomes electric signal through driver, electric signal carries out digital processing through entering single-chip microcomputer after the shaping, electric signal through digital processing, part signal becomes frequency signal, after sending out device big, frequency-selecting returns the fork body, the fork body is vibrated by setpoint frequency, the single-chip microcomputer variable signal commands relays that vibration is returned according to the fork body is moved the closed of gauge tap and is opened simultaneously, and other signals become the switching value signal, the output after the single-chip microcomputer instruction of RS-485 fieldbus signal and current signal is carried out Fieldbus Control and is realized the control of remote signal switch.

What above-mentioned described single-chip microcomputer adopted is the MSP430 surface-mounted integrated circuit.

The vibration frequency range that above-mentioned described fork body is adapted to is the following any frequency of 65500Hz.

Above-mentioned described tuning fork thing position signalling generator is equipped with a plurality of sensors, is not only applicable to tuning fork or vibrating head, also is applicable to the sensor of principles such as resistance, electric capacity, inductance.

Structural principle of the present utility model is such, adopt single-chip microcomputer and mimic channel Mixed Design, in order that keep stronger amplitude, to improve reliability, vibration signal is sent into single-chip microcomputer through shaping, measuring vibrations frequency constantly, when frequency departure during the frequency range that sets, promptly be considered to effective output condition, do not consider amplitude, so no matter failure of oscillation whether, normal output is always arranged, and shock resistance has surpassed 1.5G, and sensitivity has improved several times, adopt the single-chip microcomputer intelligentized design, the one, had adaptation function, to adapt to different fork bodies and site environment, can adapt to the following any frequency of 65500Hz, reduced requirement, be easy to debugging fork body self parameter consistency; The 2nd, had up and down thing position set-up function, realize the same logic in thing position up and down, both often opened, normally closed setting, avoided power consumption that relay causes because of long-time adhesive greatly, the problem of easy burn-out; The 4th, had the intelligent trouble arbitration functions, long-time failure of oscillation is regarded as fault, exports corresponding fault code signal, and the failure of oscillation time can be set between 1-255 hour, to adapt to different operating modes; Adopt the single-chip microcomputer intelligentized design also to embody industrial field bus, realized long-distance transmissions, simplified field wiring, host computer shows the IP address of extension number simultaneously, current frequency, thing position state and failure code, in order to the character of judgement medium and the duty of denseness and fork thing position signalling generator, be convenient to and revise the IP address of extension set and to set thing position and the setting of failure of oscillation time up and down by host computer.

Owing to adopted the structural principle of above-mentioned employing single-chip microcomputer and mimic channel Mixed Design, make the utlity model has highly sensitive, good reliability, powerful and can centralized displaying and the intelligentized characteristics of control realized rational in infrastructure, simple, reliable operation be installed, manufacturing and operating cost are low, the economic benefit height, it is the ideal substitute of traditional tuning fork level switch, be convenient to vigorously promote the use, the utility model also is applicable to as closing near other non-thing potential fields such as switches.

Description of drawings:

Fig. 1 is the utility model structural principle schematic block diagram

Embodiment:

Below in conjunction with accompanying drawing in detail the utility model is described in detail, from Fig. 1 and can find out structural principle of the present utility model, a kind of tuning fork thing position signalling generator, by the fork body, the device driver is sent out in frequency-selecting big, signal shaper, single-chip microcomputer is formed, after becoming electric signal through driver, the vibration signal that the startup of fork body is sent enters signal shaper, electric signal carries out digital processing through entering MSP430 surface-mounted integrated circuit single-chip microcomputer after the shaping, electric signal through digital processing, part signal becomes frequency signal, after sending out device big, frequency-selecting returns the fork body, the fork body is vibrated in the 60000Hz frequency range by setpoint frequency, the single-chip microcomputer variable signal commands relays that vibration is returned according to the fork body is moved the closed of gauge tap and is opened simultaneously, and his signal becomes the switching value signal, RS-485 fieldbus signal and current signal output, can carry out Fieldbus Control and realize the control of remote signal switch, tuning fork thing position signalling generator is equipped with a plurality of sensors, be not only applicable to tuning fork or vibrating head, be applicable to resistance yet, electric capacity, the sensor of principles such as inductance.Also be applicable to as closing near other non-thing potential fields such as switches.

Claims (4)

1. tuning fork thing position signalling generator, by the fork body, the device driver is sent out in frequency-selecting big, signal shaper, single-chip microcomputer is formed, it is characterized in that: enter signal shaper after the vibration signal that the startup of fork body is sent becomes electric signal through driver, electric signal carries out digital processing through entering single-chip microcomputer after the shaping, electric signal through digital processing, part signal becomes frequency signal, after sending out device big, frequency-selecting returns the fork body, the fork body is vibrated by setpoint frequency, the single-chip microcomputer variable signal commands relays that vibration is returned according to the fork body is moved the closed of gauge tap and is opened simultaneously, and other signals become the switching value signal, the output after the single-chip microcomputer instruction of RS-485 fieldbus signal and current signal is carried out Fieldbus Control and is realized the control of remote signal switch.

2. tuning fork thing according to claim 1 position signalling generator is characterized in that: what described single-chip microcomputer adopted is the MSP430 surface-mounted integrated circuit.

3. tuning fork thing according to claim 1 position signalling generator is characterized in that: the vibration frequency range that described fork body is adapted to is the following any frequency of 65500Hz.

4. tuning fork thing according to claim 1 position signalling generator is characterized in that: described tuning fork thing position signalling generator is equipped with a plurality of sensors, is not only applicable to tuning fork or vibrating head, also is applicable to the sensor of principles such as resistance, electric capacity, inductance.