CN2208225Y

CN2208225Y - Digital wireless signal transmitting weighing apparatus

Info

Publication number: CN2208225Y
Application number: CN 93207274
Authority: CN
Inventors: 陈瑞增
Original assignee: Individual
Current assignee: Individual
Priority date: 1993-03-27
Filing date: 1993-03-27
Publication date: 1995-09-20
Anticipated expiration: 2003-03-27

Abstract

The utility model relates to a digital wireless transmission weighing and force measuring device, which is formed by combining a set of digital weighing and force measuring and transmission devices and a set of receiving and display devices, wherein weighing and force measuring elements are used for sensing and measuring the weight to weigh; then, the weight signals are amplified by an amplifier; after noises are filtrated by a filter, the weight signals are converted to digital signals by an analogue-to-digital converter, and then, are transmitted by the transmission device. The receiving device receives the wireless signals; then, the signals are decoded and are reverted into the digital signals; after the digital signals are transmitted to a microcomputer to be processed, the numerical values of the signals are directly displayed; or the digital signals can be transmitted to a central control computer through a serial interface to be processed. Therefore, the weighing and force measuring device enables occasions which can not use conducting wires for signal transmission to use electronic weighing.

Description

Digital wireless signal transmitting weighing apparatus

The utility model relates to a kind of digital electronic device for measuring force of weighing, refer in particular to a kind ofly be difficult for adopting wired mode to transmit wireless transmission type that the signal occasion the uses device for measuring force of weighing, it can so that weigh that the gained data are easy to read, observation and record.

Because being showing improvement or progress day by day of science and technology, the weighing apparatus usable range of weighing more and more widely.Again in order to read, make things convenient for record easily, weighing device gradually with digital display for controlling the trend.Current digital weighing device is not outer in dual mode: a kind of is weight sensing apparatus and the display device person of being integrated, as electronic scale common on the open market.Another kind is that weight sensing apparatus and display device are separated into two parts and rely on cable to transmit necessary signals, as various large and small weighbridges.Yet in some occasion, these two kinds of weighing devices are very not suitable.The title that hangs that for example cooperates the driving use, because of it must hang on the suspension hook of driving, and with the suspension hook oscilaltion, the weight display part just is difficult to be connected with weighing device with electric wire like this, so, this title that hangs mostly is integral type at present, and promptly the weight sensing is integrated with demonstration two parts, and by the battery supply power.Because the charge capacity of battery is limited, so, for the long working time can be arranged, and also can see clearly Chu at a distance, generally all adopt large-scale liquid crystal (L.C.D.) to show its numerical value.But the visible angle of liquid crystal is less, can not especially must write down, read the value of weighing by the people in dark place reading numerical values again, can not directly be connected with management system or control system, and its practicality is had a greatly reduced quality.

The purpose of this utility model provides a kind of novel device for measuring force of weighing----digital radio transmission type that can overcome above-mentioned defective device for measuring force of weighing.

The utility model is dimerous by sensing conveyer and receiving and displaying device, wherein the sensing conveyer mainly be the amplifier that amplified by the weight sensing element that can export the high low signal of corresponding weight after stressed, with above-mentioned signal, the unnecessary signal of filtering wave filter, this conversion of signals is become the analog to digital converter of digital signal, above-mentioned digital signal is weaved into serial sequence and insert the scrambler of identification code and the radio transmitter that this coded signal is launched constituted; Receiving and displaying device by the receiver that receives above-mentioned coded signal, with signal be reduced into digital signal demoder and this digital signal handle, the microcomputer of digital-to-analog conversion and demonstration forms.The coded digital signal of sensing conveyer is sent to receiving and displaying device in the radiowave mode.

The utility model has the advantages that:, can omit the puzzlement of backguy because the weight sensing of separating transmits signal with receiving demonstration two parts in the radiowave mode.The transmission of digital signal, processing accuracy height, antijamming capability is strong, is not subjected to the influence of sensing apparatus; And the signal to sensitivity amplifies, the very close sensor of filtering and analog-to-digital place, and the transmission distortion that can not produce signal is so whole device can have very high measurement accuracy.The utility model has inserted identification code to signal encoding the time, good in anti-interference performance.The Integrated weighing processing unit that can adopt several sensing conveyers to share a group of received display device and form.Be connected because receiving and displaying device can directly be controlled (management) computing machine by the communication interface of microcomputer with central authorities, realize the full automation of weighing.

Specifically introduce design feature of the present utility model below in conjunction with drawings and Examples.

Fig. 1 is a single unit system synoptic diagram of the present utility model.

Fig. 2 is the block scheme of the utility model sensing conveyer.

Fig. 3 is the block scheme of the utility model receiving and displaying device.

Fig. 4 is the electrical schematic diagram of the utility model sensing conveyer.

Fig. 5 is the utility model wireless launcher electrical schematic diagram.

Fig. 6 is the utility model radio receiver electrical schematic diagram.

Fig. 7 is the electrical schematic diagram of the utility model receiving and displaying device.

Fig. 8 is wave filter reference circuit figure of the present utility model.

Fig. 9 is the waveform synoptic diagram of string type coding of the present utility model, transmission.

Referring to Fig. 1, maximum characteristics of the present utility model are to be divided into sensing conveyer A and receiving and displaying device B two parts, and these two parts separate fully, and the signal transmission between them transmits reception by the digital signal wireless communication pattern.

Consult Fig. 2, Fig. 3, it is after the carrying sensitive element in the weight sensor 1 is stressed that the block scheme of sensing conveyer A of the present utility model constitutes, just export the corresponding sensitive signal of itself and load weight size, this signal is after amplifying circuit 2 is amplified to suitable size, again through the unnecessary impurity signal of dynamic filter circuits 3 filterings, just enter analog to digital converter 4, the simulating signal of original weight numerical quantity is given digitizing, the encoded again device 5 of this digital signal is weaved into the digital signal of serial sequence, also inserts identification code simultaneously.Like this, except get rid of disturbing, can also receive the signal that several sensing conveyers send, distinguish identification by identification code one by one, process and display respectively by a receiver 7.After coding was finished, the serial code digital signal that adds after the identification code just can be launched it by radio transmitter 6.

The block diagram of receiving and displaying device B constitutes: after receiving the serial digital radiowave that contains identification signal and weight signal that radio transmitters 6 are launched by receiver 7, by demoder 8 its decoding is reduced into the parallel microcomputer 9 of sending into of parallel digital signal of original expression weight again, after being carried out data processing, converted to actual weight by computing machine 9, the display device 10 of sending into output device by computing machine directly demonstrates weight numerical value again.Also can control (management) computing machine by its serial line interface with central authorities by microcomputer 9 is connected.

Fig. 4, Fig. 5, Fig. 6 and Fig. 7 have showed the associated electrical schematic diagram of the utility model embodiment respectively.

Fig. 8 A is the reference circuit of passive type wave filter.

Fig. 8 B is the reference circuit of active filter.

Oscillator is a clock signal in the utility model serial code waveform synoptic diagram shown in Figure 9, and Tc is the clock period, and output is the waveform of scrambler output.Wherein the 1st～3 (bit0～bit2) signal is an identification code, can set it as required, and the 4th～8 signal is the digital signal of number-Mo conversion, and the 9th～12 signal is standby reference.

Claims

1, a kind of digital radio transmission type ergographic sensing emitter of weighing, it is characterized in that: this device mainly be the amplifier that amplified by the weight sensing element that can export the high low signal of corresponding weight after stressed, with above-mentioned signal, the unnecessary signal of filtering wave filter, this conversion of signals is become the analog to digital converter of digital signal, above-mentioned digital signal is weaved into serial sequence and insert the scrambler of identification code and the radio transmitter that this coded signal is launched constituted.